Remove libcorkscrew.

All unwinding is now done through libunwind.

Change-Id: I93ba6f5bd5ad41eeb5f6a93113b7894f842cc8e0

21 files changed, 0 insertions, 4428 deletions

diff --git a/libcorkscrew/Android.mk b/libcorkscrew/Android.mk
deleted file mode 100644
index 8f3b68c..0000000
--- a/libcorkscrew/Android.mk
+++ /dev/null
@@ -1,100 +0,0 @@
-# Copyright (C) 2011 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-LOCAL_PATH:= $(call my-dir)
-
-generic_src_files := \
-	backtrace.c \
-	backtrace-helper.c \
-	demangle.c \
-	map_info.c \
-	ptrace.c \
-	symbol_table.c
-
-arm_src_files := \
-	arch-arm/backtrace-arm.c \
-	arch-arm/ptrace-arm.c
-
-x86_src_files := \
-	arch-x86/backtrace-x86.c \
-	arch-x86/ptrace-x86.c
-
-ifneq ($(TARGET_IS_64_BIT),true)
-
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := $(generic_src_files)
-
-ifeq ($(TARGET_ARCH),arm)
-LOCAL_SRC_FILES += $(arm_src_files)
-LOCAL_CFLAGS += -DCORKSCREW_HAVE_ARCH
-endif
-ifeq ($(TARGET_ARCH),x86)
-LOCAL_SRC_FILES += $(x86_src_files)
-LOCAL_CFLAGS += -DCORKSCREW_HAVE_ARCH
-endif
-ifeq ($(TARGET_ARCH),mips)
-LOCAL_SRC_FILES += \
-	arch-mips/backtrace-mips.c \
-	arch-mips/ptrace-mips.c
-LOCAL_CFLAGS += -DCORKSCREW_HAVE_ARCH
-endif
-
-LOCAL_SHARED_LIBRARIES += libdl libcutils liblog libgccdemangle
-
-LOCAL_CFLAGS += -std=gnu99 -Werror -Wno-unused-parameter
-LOCAL_MODULE := libcorkscrew
-LOCAL_MODULE_TAGS := optional
-
-include $(BUILD_SHARED_LIBRARY)
-
-# Build test.
-include $(CLEAR_VARS)
-LOCAL_SRC_FILES := test.cpp
-LOCAL_CFLAGS += -Werror -fno-inline-small-functions
-LOCAL_SHARED_LIBRARIES := libcorkscrew
-LOCAL_MODULE := libcorkscrew_test
-LOCAL_MODULE_TAGS := optional
-include $(BUILD_EXECUTABLE)
-
-endif # TARGET_IS_64_BIT == false
-
-
-ifeq ($(HOST_OS)-$(HOST_ARCH),linux-x86)
-
-# Build libcorkscrew.
-include $(CLEAR_VARS)
-LOCAL_SRC_FILES += $(generic_src_files) $(x86_src_files)
-LOCAL_CFLAGS += -DCORKSCREW_HAVE_ARCH
-LOCAL_STATIC_LIBRARIES += libcutils liblog
-LOCAL_LDLIBS += -ldl
-ifeq ($(HOST_OS),linux)
-  LOCAL_SHARED_LIBRARIES += libgccdemangle # TODO: is this even needed on Linux?
-  LOCAL_LDLIBS += -lrt
-endif
-LOCAL_CFLAGS += -std=gnu99 -Werror -Wno-unused-parameter
-LOCAL_MODULE := libcorkscrew
-LOCAL_MODULE_TAGS := optional
-include $(BUILD_HOST_SHARED_LIBRARY)
-
-# Build test.
-include $(CLEAR_VARS)
-LOCAL_SRC_FILES := test.cpp
-LOCAL_CFLAGS += -Werror
-LOCAL_SHARED_LIBRARIES := libcorkscrew
-LOCAL_MODULE := libcorkscrew_test
-LOCAL_MODULE_TAGS := optional
-include $(BUILD_HOST_EXECUTABLE)
-
-endif # $(HOST_OS)-$(HOST_ARCH) == linux-x86
diff --git a/libcorkscrew/MODULE_LICENSE_APACHE2 b/libcorkscrew/MODULE_LICENSE_APACHE2
deleted file mode 100644
index e69de29..0000000
--- a/libcorkscrew/MODULE_LICENSE_APACHE2
+++ /dev/null
diff --git a/libcorkscrew/NOTICE b/libcorkscrew/NOTICE
deleted file mode 100644
index becc120..0000000
--- a/libcorkscrew/NOTICE
+++ /dev/null
@@ -1,190 +0,0 @@
-
-   Copyright (c) 2011, The Android Open Source Project
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
-
-
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-   1. Definitions.
-
-      "License" shall mean the terms and conditions for use, reproduction,
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-      direction or management of such entity, whether by contract or
-      otherwise, or (ii) ownership of fifty percent (50%) or more of the
-      outstanding shares, or (iii) beneficial ownership of such entity.
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-      represent, as a whole, an original work of authorship. For the purposes
-      of this License, Derivative Works shall not include works that remain
-      separable from, or merely link (or bind by name) to the interfaces of,
-      the Work and Derivative Works thereof.
-
-      "Contribution" shall mean any work of authorship, including
-      the original version of the Work and any modifications or additions
-      to that Work or Derivative Works thereof, that is intentionally
-      submitted to Licensor for inclusion in the Work by the copyright owner
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-      to the Licensor or its representatives, including but not limited to
-      communication on electronic mailing lists, source code control systems,
-      and issue tracking systems that are managed by, or on behalf of, the
-      Licensor for the purpose of discussing and improving the Work, but
-      excluding communication that is conspicuously marked or otherwise
-      designated in writing by the copyright owner as "Not a Contribution."
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-      on behalf of whom a Contribution has been received by Licensor and
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-      where such license applies only to those patent claims licensable
-      by such Contributor that are necessarily infringed by their
-      Contribution(s) alone or by combination of their Contribution(s)
-      with the Work to which such Contribution(s) was submitted. If You
-      institute patent litigation against any entity (including a
-      cross-claim or counterclaim in a lawsuit) alleging that the Work
-      or a Contribution incorporated within the Work constitutes direct
-      or contributory patent infringement, then any patent licenses
-      granted to You under this License for that Work shall terminate
-      as of the date such litigation is filed.
-
-   4. Redistribution. You may reproduce and distribute copies of the
-      Work or Derivative Works thereof in any medium, with or without
-      modifications, and in Source or Object form, provided that You
-      meet the following conditions:
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-          Derivative Works a copy of this License; and
-
-      (b) You must cause any modified files to carry prominent notices
-          stating that You changed the files; and
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-      (c) You must retain, in the Source form of any Derivative Works
-          that You distribute, all copyright, patent, trademark, and
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-      any Contribution intentionally submitted for inclusion in the Work
-      by You to the Licensor shall be under the terms and conditions of
-      this License, without any additional terms or conditions.
-      Notwithstanding the above, nothing herein shall supersede or modify
-      the terms of any separate license agreement you may have executed
-      with Licensor regarding such Contributions.
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-   6. Trademarks. This License does not grant permission to use the trade
-      names, trademarks, service marks, or product names of the Licensor,
-      except as required for reasonable and customary use in describing the
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-   7. Disclaimer of Warranty. Unless required by applicable law or
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-      appropriateness of using or redistributing the Work and assume any
-      risks associated with Your exercise of permissions under this License.
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-   8. Limitation of Liability. In no event and under no legal theory,
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diff --git a/libcorkscrew/arch-arm/backtrace-arm.c b/libcorkscrew/arch-arm/backtrace-arm.c
deleted file mode 100644
index 751efbf..0000000
--- a/libcorkscrew/arch-arm/backtrace-arm.c
+++ /dev/null
@@ -1,589 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/*
- * Backtracing functions for ARM.
- *
- * This implementation uses the exception unwinding tables provided by
- * the compiler to unwind call frames.  Refer to the ARM Exception Handling ABI
- * documentation (EHABI) for more details about what's going on here.
- *
- * An ELF binary may contain an EXIDX section that provides an index to
- * the exception handling table of each function, sorted by program
- * counter address.
- *
- * This implementation also supports unwinding other processes via ptrace().
- * In that case, the EXIDX section is found by reading the ELF section table
- * structures using ptrace().
- *
- * Because the tables are used for exception handling, it can happen that
- * a given function will not have an exception handling table.  In particular,
- * exceptions are assumed to only ever be thrown at call sites.  Therefore,
- * by definition leaf functions will not have exception handling tables.
- * This may make unwinding impossible in some cases although we can still get
- * some idea of the call stack by examining the PC and LR registers.
- *
- * As we are only interested in backtrace information, we do not need
- * to perform all of the work of unwinding such as restoring register
- * state and running cleanup functions.  Unwinding is performed virtually on
- * an abstract machine context consisting of just the ARM core registers.
- * Furthermore, we do not run generic "personality functions" because
- * we may not be in a position to execute arbitrary code, especially if
- * we are running in a signal handler or using ptrace()!
- */
-
-#define LOG_TAG "Corkscrew"
-//#define LOG_NDEBUG 0
-
-#include "../backtrace-arch.h"
-#include "../backtrace-helper.h"
-#include "../ptrace-arch.h"
-#include <corkscrew/ptrace.h>
-
-#include <stdlib.h>
-#include <signal.h>
-#include <stdbool.h>
-#include <limits.h>
-#include <errno.h>
-#include <sys/ptrace.h>
-#include <elf.h>
-#include <cutils/log.h>
-
-#include <ucontext.h>
-
-/* Unwind state. */
-typedef struct {
-    uint32_t gregs[16];
-} unwind_state_t;
-
-static const int R_SP = 13;
-static const int R_LR = 14;
-static const int R_PC = 15;
-
-/* Special EXIDX value that indicates that a frame cannot be unwound. */
-static const uint32_t EXIDX_CANTUNWIND = 1;
-
-/* Get the EXIDX section start and size for the module that contains a
- * given program counter address.
- *
- * When the executable is statically linked, the EXIDX section can be
- * accessed by querying the values of the __exidx_start and __exidx_end
- * symbols.
- *
- * When the executable is dynamically linked, the linker exports a function
- * called dl_unwind_find_exidx that obtains the EXIDX section for a given
- * absolute program counter address.
- *
- * Bionic exports a helpful function called __gnu_Unwind_Find_exidx that
- * handles both cases, so we use that here.
- */
-typedef long unsigned int* _Unwind_Ptr;
-extern _Unwind_Ptr __gnu_Unwind_Find_exidx(_Unwind_Ptr pc, int *pcount);
-
-static uintptr_t find_exidx(uintptr_t pc, size_t* out_exidx_size) {
-    int count;
-    uintptr_t start = (uintptr_t)__gnu_Unwind_Find_exidx((_Unwind_Ptr)pc, &count);
-    *out_exidx_size = count;
-    return start;
-}
-
-/* Transforms a 31-bit place-relative offset to an absolute address.
- * We assume the most significant bit is clear. */
-static uintptr_t prel_to_absolute(uintptr_t place, uint32_t prel_offset) {
-    return place + (((int32_t)(prel_offset << 1)) >> 1);
-}
-
-static uintptr_t get_exception_handler(const memory_t* memory,
-        const map_info_t* map_info_list, uintptr_t pc) {
-    if (!pc) {
-        ALOGV("get_exception_handler: pc is zero, no handler");
-        return 0;
-    }
-
-    uintptr_t exidx_start;
-    size_t exidx_size;
-    const map_info_t* mi;
-    if (memory->tid < 0) {
-        mi = NULL;
-        exidx_start = find_exidx(pc, &exidx_size);
-    } else {
-        mi = find_map_info(map_info_list, pc);
-        if (mi && mi->data) {
-            const map_info_data_t* data = (const map_info_data_t*)mi->data;
-            exidx_start = data->exidx_start;
-            exidx_size = data->exidx_size;
-        } else {
-            exidx_start = 0;
-            exidx_size = 0;
-        }
-    }
-
-    uintptr_t handler = 0;
-    int32_t handler_index = -1;
-    if (exidx_start) {
-        uint32_t low = 0;
-        uint32_t high = exidx_size;
-        while (low < high) {
-            uint32_t index = (low + high) / 2;
-            uintptr_t entry = exidx_start + index * 8;
-            uint32_t entry_prel_pc;
-            ALOGV("XXX low=%u, high=%u, index=%u", low, high, index);
-            if (!try_get_word(memory, entry, &entry_prel_pc)) {
-                break;
-            }
-            uintptr_t entry_pc = prel_to_absolute(entry, entry_prel_pc);
-            ALOGV("XXX entry_pc=0x%08x", entry_pc);
-            if (pc < entry_pc) {
-                high = index;
-                continue;
-            }
-            if (index + 1 < exidx_size) {
-                uintptr_t next_entry = entry + 8;
-                uint32_t next_entry_prel_pc;
-                if (!try_get_word(memory, next_entry, &next_entry_prel_pc)) {
-                    break;
-                }
-                uintptr_t next_entry_pc = prel_to_absolute(next_entry, next_entry_prel_pc);
-                ALOGV("XXX next_entry_pc=0x%08x", next_entry_pc);
-                if (pc >= next_entry_pc) {
-                    low = index + 1;
-                    continue;
-                }
-            }
-
-            uintptr_t entry_handler_ptr = entry + 4;
-            uint32_t entry_handler;
-            if (!try_get_word(memory, entry_handler_ptr, &entry_handler)) {
-                break;
-            }
-            if (entry_handler & (1L << 31)) {
-                handler = entry_handler_ptr; // in-place handler data
-            } else if (entry_handler != EXIDX_CANTUNWIND) {
-                handler = prel_to_absolute(entry_handler_ptr, entry_handler);
-            }
-            handler_index = index;
-            break;
-        }
-    }
-    if (mi) {
-        ALOGV("get_exception_handler: pc=0x%08x, module='%s', module_start=0x%08x, "
-                "exidx_start=0x%08x, exidx_size=%d, handler=0x%08x, handler_index=%d",
-                pc, mi->name, mi->start, exidx_start, exidx_size, handler, handler_index);
-    } else {
-        ALOGV("get_exception_handler: pc=0x%08x, "
-                "exidx_start=0x%08x, exidx_size=%d, handler=0x%08x, handler_index=%d",
-                pc, exidx_start, exidx_size, handler, handler_index);
-    }
-    return handler;
-}
-
-typedef struct {
-    uintptr_t ptr;
-    uint32_t word;
-} byte_stream_t;
-
-static bool try_next_byte(const memory_t* memory, byte_stream_t* stream, uint8_t* out_value) {
-    uint8_t result;
-    switch (stream->ptr & 3) {
-    case 0:
-        if (!try_get_word(memory, stream->ptr, &stream->word)) {
-            *out_value = 0;
-            return false;
-        }
-        *out_value = stream->word >> 24;
-        break;
-
-    case 1:
-        *out_value = stream->word >> 16;
-        break;
-
-    case 2:
-        *out_value = stream->word >> 8;
-        break;
-
-    default:
-        *out_value = stream->word;
-        break;
-    }
-
-    ALOGV("next_byte: ptr=0x%08x, value=0x%02x", stream->ptr, *out_value);
-    stream->ptr += 1;
-    return true;
-}
-
-static void set_reg(unwind_state_t* state, uint32_t reg, uint32_t value) {
-    ALOGV("set_reg: reg=%d, value=0x%08x", reg, value);
-    state->gregs[reg] = value;
-}
-
-static bool try_pop_registers(const memory_t* memory, unwind_state_t* state, uint32_t mask) {
-    uint32_t sp = state->gregs[R_SP];
-    bool sp_updated = false;
-    for (int i = 0; i < 16; i++) {
-        if (mask & (1 << i)) {
-            uint32_t value;
-            if (!try_get_word(memory, sp, &value)) {
-                return false;
-            }
-            if (i == R_SP) {
-                sp_updated = true;
-            }
-            set_reg(state, i, value);
-            sp += 4;
-        }
-    }
-    if (!sp_updated) {
-        set_reg(state, R_SP, sp);
-    }
-    return true;
-}
-
-/* Executes a built-in personality routine as defined in the EHABI.
- * Returns true if unwinding should continue.
- *
- * The data for the built-in personality routines consists of a sequence
- * of unwinding instructions, followed by a sequence of scope descriptors,
- * each of which has a length and offset encoded using 16-bit or 32-bit
- * values.
- *
- * We only care about the unwinding instructions.  They specify the
- * operations of an abstract machine whose purpose is to transform the
- * virtual register state (including the stack pointer) such that
- * the call frame is unwound and the PC register points to the call site.
- */
-static bool execute_personality_routine(const memory_t* memory,
-        unwind_state_t* state, byte_stream_t* stream, int pr_index) {
-    size_t size;
-    switch (pr_index) {
-    case 0: // Personality routine #0, short frame, descriptors have 16-bit scope.
-        size = 3;
-        break;
-    case 1: // Personality routine #1, long frame, descriptors have 16-bit scope.
-    case 2: { // Personality routine #2, long frame, descriptors have 32-bit scope.
-        uint8_t size_byte;
-        if (!try_next_byte(memory, stream, &size_byte)) {
-            return false;
-        }
-        size = (uint32_t)size_byte * sizeof(uint32_t) + 2;
-        break;
-    }
-    default: // Unknown personality routine.  Stop here.
-        return false;
-    }
-
-    bool pc_was_set = false;
-    while (size--) {
-        uint8_t op;
-        if (!try_next_byte(memory, stream, &op)) {
-            return false;
-        }
-        if ((op & 0xc0) == 0x00) {
-            // "vsp = vsp + (xxxxxx << 2) + 4"
-            set_reg(state, R_SP, state->gregs[R_SP] + ((op & 0x3f) << 2) + 4);
-        } else if ((op & 0xc0) == 0x40) {
-            // "vsp = vsp - (xxxxxx << 2) - 4"
-            set_reg(state, R_SP, state->gregs[R_SP] - ((op & 0x3f) << 2) - 4);
-        } else if ((op & 0xf0) == 0x80) {
-            uint8_t op2;
-            if (!(size--) || !try_next_byte(memory, stream, &op2)) {
-                return false;
-            }
-            uint32_t mask = (((uint32_t)op & 0x0f) << 12) | ((uint32_t)op2 << 4);
-            if (mask) {
-                // "Pop up to 12 integer registers under masks {r15-r12}, {r11-r4}"
-                if (!try_pop_registers(memory, state, mask)) {
-                    return false;
-                }
-                if (mask & (1 << R_PC)) {
-                    pc_was_set = true;
-                }
-            } else {
-                // "Refuse to unwind"
-                return false;
-            }
-        } else if ((op & 0xf0) == 0x90) {
-            if (op != 0x9d && op != 0x9f) {
-                // "Set vsp = r[nnnn]"
-                set_reg(state, R_SP, state->gregs[op & 0x0f]);
-            } else {
-                // "Reserved as prefix for ARM register to register moves"
-                // "Reserved as prefix for Intel Wireless MMX register to register moves"
-                return false;
-            }
-        } else if ((op & 0xf8) == 0xa0) {
-            // "Pop r4-r[4+nnn]"
-            uint32_t mask = (0x0ff0 >> (7 - (op & 0x07))) & 0x0ff0;
-            if (!try_pop_registers(memory, state, mask)) {
-                return false;
-            }
-        } else if ((op & 0xf8) == 0xa8) {
-            // "Pop r4-r[4+nnn], r14"
-            uint32_t mask = ((0x0ff0 >> (7 - (op & 0x07))) & 0x0ff0) | 0x4000;
-            if (!try_pop_registers(memory, state, mask)) {
-                return false;
-            }
-        } else if (op == 0xb0) {
-            // "Finish"
-            break;
-        } else if (op == 0xb1) {
-            uint8_t op2;
-            if (!(size--) || !try_next_byte(memory, stream, &op2)) {
-                return false;
-            }
-            if (op2 != 0x00 && (op2 & 0xf0) == 0x00) {
-                // "Pop integer registers under mask {r3, r2, r1, r0}"
-                if (!try_pop_registers(memory, state, op2)) {
-                    return false;
-                }
-            } else {
-                // "Spare"
-                return false;
-            }
-        } else if (op == 0xb2) {
-            // "vsp = vsp + 0x204 + (uleb128 << 2)"
-            uint32_t value = 0;
-            uint32_t shift = 0;
-            uint8_t op2;
-            do {
-                if (!(size--) || !try_next_byte(memory, stream, &op2)) {
-                    return false;
-                }
-                value |= (op2 & 0x7f) << shift;
-                shift += 7;
-            } while (op2 & 0x80);
-            set_reg(state, R_SP, state->gregs[R_SP] + (value << 2) + 0x204);
-        } else if (op == 0xb3) {
-            // "Pop VFP double-precision registers D[ssss]-D[ssss+cccc] saved (as if) by FSTMFDX"
-            uint8_t op2;
-            if (!(size--) || !try_next_byte(memory, stream, &op2)) {
-                return false;
-            }
-            set_reg(state, R_SP, state->gregs[R_SP] + (uint32_t)(op2 & 0x0f) * 8 + 12);
-        } else if ((op & 0xf8) == 0xb8) {
-            // "Pop VFP double-precision registers D[8]-D[8+nnn] saved (as if) by FSTMFDX"
-            set_reg(state, R_SP, state->gregs[R_SP] + (uint32_t)(op & 0x07) * 8 + 12);
-        } else if ((op & 0xf8) == 0xc0) {
-            // "Intel Wireless MMX pop wR[10]-wR[10+nnn]"
-            set_reg(state, R_SP, state->gregs[R_SP] + (uint32_t)(op & 0x07) * 8 + 8);
-        } else if (op == 0xc6) {
-            // "Intel Wireless MMX pop wR[ssss]-wR[ssss+cccc]"
-            uint8_t op2;
-            if (!(size--) || !try_next_byte(memory, stream, &op2)) {
-                return false;
-            }
-            set_reg(state, R_SP, state->gregs[R_SP] + (uint32_t)(op2 & 0x0f) * 8 + 8);
-        } else if (op == 0xc7) {
-            uint8_t op2;
-            if (!(size--) || !try_next_byte(memory, stream, &op2)) {
-                return false;
-            }
-            if (op2 != 0x00 && (op2 & 0xf0) == 0x00) {
-                // "Intel Wireless MMX pop wCGR registers under mask {wCGR3,2,1,0}"
-                set_reg(state, R_SP, state->gregs[R_SP] + __builtin_popcount(op2) * 4);
-            } else {
-                // "Spare"
-                return false;
-            }
-        } else if (op == 0xc8) {
-            // "Pop VFP double precision registers D[16+ssss]-D[16+ssss+cccc]
-            // saved (as if) by FSTMFD"
-            uint8_t op2;
-            if (!(size--) || !try_next_byte(memory, stream, &op2)) {
-                return false;
-            }
-            set_reg(state, R_SP, state->gregs[R_SP] + (uint32_t)(op2 & 0x0f) * 8 + 8);
-        } else if (op == 0xc9) {
-            // "Pop VFP double precision registers D[ssss]-D[ssss+cccc] saved (as if) by FSTMFDD"
-            uint8_t op2;
-            if (!(size--) || !try_next_byte(memory, stream, &op2)) {
-                return false;
-            }
-            set_reg(state, R_SP, state->gregs[R_SP] + (uint32_t)(op2 & 0x0f) * 8 + 8);
-        } else if ((op == 0xf8) == 0xd0) {
-            // "Pop VFP double-precision registers D[8]-D[8+nnn] saved (as if) by FSTMFDD"
-            set_reg(state, R_SP, state->gregs[R_SP] + (uint32_t)(op & 0x07) * 8 + 8);
-        } else {
-            // "Spare"
-            return false;
-        }
-    }
-    if (!pc_was_set) {
-        set_reg(state, R_PC, state->gregs[R_LR]);
-    }
-    return true;
-}
-
-static bool try_get_half_word(const memory_t* memory, uint32_t pc, uint16_t* out_value) {
-    uint32_t word;
-    if (try_get_word(memory, pc & ~2, &word)) {
-        *out_value = pc & 2 ? word >> 16 : word & 0xffff;
-        return true;
-    }
-    return false;
-}
-
-uintptr_t rewind_pc_arch(const memory_t* memory, uintptr_t pc) {
-    if (pc & 1) {
-        /* Thumb mode - need to check whether the bl(x) has long offset or not.
-         * Examples:
-         *
-         * arm blx in the middle of thumb:
-         * 187ae:       2300            movs    r3, #0
-         * 187b0:       f7fe ee1c       blx     173ec
-         * 187b4:       2c00            cmp     r4, #0
-         *
-         * arm bl in the middle of thumb:
-         * 187d8:       1c20            adds    r0, r4, #0
-         * 187da:       f136 fd15       bl      14f208
-         * 187de:       2800            cmp     r0, #0
-         *
-         * pure thumb:
-         * 18894:       189b            adds    r3, r3, r2
-         * 18896:       4798            blx     r3
-         * 18898:       b001            add     sp, #4
-         */
-        uint16_t prev1, prev2;
-        if (try_get_half_word(memory, pc - 5, &prev1)
-            && ((prev1 & 0xf000) == 0xf000)
-            && try_get_half_word(memory, pc - 3, &prev2)
-            && ((prev2 & 0xe000) == 0xe000)) {
-            pc -= 4; // long offset
-        } else {
-            pc -= 2;
-        }
-    } else {
-        /* ARM mode, all instructions are 32bit.  Yay! */
-        pc -= 4;
-    }
-    return pc;
-}
-
-static ssize_t unwind_backtrace_common(const memory_t* memory,
-        const map_info_t* map_info_list,
-        unwind_state_t* state, backtrace_frame_t* backtrace,
-        size_t ignore_depth, size_t max_depth) {
-    size_t ignored_frames = 0;
-    size_t returned_frames = 0;
-
-    for (size_t index = 0; returned_frames < max_depth; index++) {
-        uintptr_t pc = index ? rewind_pc_arch(memory, state->gregs[R_PC])
-                : state->gregs[R_PC];
-        backtrace_frame_t* frame = add_backtrace_entry(pc,
-                backtrace, ignore_depth, max_depth, &ignored_frames, &returned_frames);
-        if (frame) {
-            frame->stack_top = state->gregs[R_SP];
-        }
-
-        uintptr_t handler = get_exception_handler(memory, map_info_list, pc);
-        if (!handler) {
-            // If there is no handler for the PC and this is the first frame,
-            // then the program may have branched to an invalid address.
-            // Try starting from the LR instead, otherwise stop unwinding.
-            if (index == 0 && state->gregs[R_LR]
-                    && state->gregs[R_LR] != state->gregs[R_PC]) {
-                set_reg(state, R_PC, state->gregs[R_LR]);
-                continue;
-            } else {
-                break;
-            }
-        }
-
-        byte_stream_t stream;
-        stream.ptr = handler;
-        uint8_t pr;
-        if (!try_next_byte(memory, &stream, &pr)) {
-            break;
-        }
-        if ((pr & 0xf0) != 0x80) {
-            // The first word is a place-relative pointer to a generic personality
-            // routine function.  We don't support invoking such functions, so stop here.
-            break;
-        }
-
-        // The first byte indicates the personality routine to execute.
-        // Following bytes provide instructions to the personality routine.
-        if (!execute_personality_routine(memory, state, &stream, pr & 0x0f)) {
-            break;
-        }
-        if (frame && state->gregs[R_SP] > frame->stack_top) {
-            frame->stack_size = state->gregs[R_SP] - frame->stack_top;
-        }
-        if (!state->gregs[R_PC]) {
-            break;
-        }
-    }
-
-    // Ran out of frames that we could unwind using handlers.
-    // Add a final entry for the LR if it looks sane and call it good.
-    if (returned_frames < max_depth
-            && state->gregs[R_LR]
-            && state->gregs[R_LR] != state->gregs[R_PC]
-            && is_executable_map(map_info_list, state->gregs[R_LR])) {
-        // We don't know where the stack for this extra frame starts so we
-        // don't return any stack information for it.
-        add_backtrace_entry(rewind_pc_arch(memory, state->gregs[R_LR]),
-                backtrace, ignore_depth, max_depth, &ignored_frames, &returned_frames);
-    }
-    return returned_frames;
-}
-
-ssize_t unwind_backtrace_signal_arch(siginfo_t* siginfo, void* sigcontext,
-        const map_info_t* map_info_list,
-        backtrace_frame_t* backtrace, size_t ignore_depth, size_t max_depth) {
-    const ucontext_t* uc = (const ucontext_t*)sigcontext;
-
-    unwind_state_t state;
-
-    state.gregs[0] = uc->uc_mcontext.arm_r0;
-    state.gregs[1] = uc->uc_mcontext.arm_r1;
-    state.gregs[2] = uc->uc_mcontext.arm_r2;
-    state.gregs[3] = uc->uc_mcontext.arm_r3;
-    state.gregs[4] = uc->uc_mcontext.arm_r4;
-    state.gregs[5] = uc->uc_mcontext.arm_r5;
-    state.gregs[6] = uc->uc_mcontext.arm_r6;
-    state.gregs[7] = uc->uc_mcontext.arm_r7;
-    state.gregs[8] = uc->uc_mcontext.arm_r8;
-    state.gregs[9] = uc->uc_mcontext.arm_r9;
-    state.gregs[10] = uc->uc_mcontext.arm_r10;
-    state.gregs[11] = uc->uc_mcontext.arm_fp;
-    state.gregs[12] = uc->uc_mcontext.arm_ip;
-    state.gregs[13] = uc->uc_mcontext.arm_sp;
-    state.gregs[14] = uc->uc_mcontext.arm_lr;
-    state.gregs[15] = uc->uc_mcontext.arm_pc;
-
-    memory_t memory;
-    init_memory(&memory, map_info_list);
-    return unwind_backtrace_common(&memory, map_info_list, &state,
-            backtrace, ignore_depth, max_depth);
-}
-
-ssize_t unwind_backtrace_ptrace_arch(pid_t tid, const ptrace_context_t* context,
-        backtrace_frame_t* backtrace, size_t ignore_depth, size_t max_depth) {
-    struct pt_regs regs;
-    if (ptrace(PTRACE_GETREGS, tid, 0, &regs)) {
-        return -1;
-    }
-
-    unwind_state_t state;
-    for (int i = 0; i < 16; i++) {
-        state.gregs[i] = regs.uregs[i];
-    }
-
-    memory_t memory;
-    init_memory_ptrace(&memory, tid);
-    return unwind_backtrace_common(&memory, context->map_info_list, &state,
-            backtrace, ignore_depth, max_depth);
-}
diff --git a/libcorkscrew/arch-arm/ptrace-arm.c b/libcorkscrew/arch-arm/ptrace-arm.c
deleted file mode 100644
index a50844e..0000000
--- a/libcorkscrew/arch-arm/ptrace-arm.c
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "Corkscrew"
-//#define LOG_NDEBUG 0
-
-#include "../ptrace-arch.h"
-
-#include <elf.h>
-#include <cutils/log.h>
-
-#ifndef PT_ARM_EXIDX
-#define PT_ARM_EXIDX 0x70000001
-#endif
-
-static void load_exidx_header(pid_t pid, map_info_t* mi,
-        uintptr_t* out_exidx_start, size_t* out_exidx_size) {
-    uint32_t elf_phoff;
-    uint32_t elf_phentsize_ehsize;
-    uint32_t elf_shentsize_phnum;
-    if (try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_phoff), &elf_phoff)
-            && try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_ehsize),
-                    &elf_phentsize_ehsize)
-            && try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_phnum),
-                    &elf_shentsize_phnum)) {
-        uint32_t elf_phentsize = elf_phentsize_ehsize >> 16;
-        uint32_t elf_phnum = elf_shentsize_phnum & 0xffff;
-        for (uint32_t i = 0; i < elf_phnum; i++) {
-            uintptr_t elf_phdr = mi->start + elf_phoff + i * elf_phentsize;
-            uint32_t elf_phdr_type;
-            if (!try_get_word_ptrace(pid, elf_phdr + offsetof(Elf32_Phdr, p_type), &elf_phdr_type)) {
-                break;
-            }
-            if (elf_phdr_type == PT_ARM_EXIDX) {
-                uint32_t elf_phdr_offset;
-                uint32_t elf_phdr_filesz;
-                if (!try_get_word_ptrace(pid, elf_phdr + offsetof(Elf32_Phdr, p_offset),
-                        &elf_phdr_offset)
-                        || !try_get_word_ptrace(pid, elf_phdr + offsetof(Elf32_Phdr, p_filesz),
-                                &elf_phdr_filesz)) {
-                    break;
-                }
-                *out_exidx_start = mi->start + elf_phdr_offset;
-                *out_exidx_size = elf_phdr_filesz / 8;
-                ALOGV("Parsed EXIDX header info for %s: start=0x%08x, size=%d", mi->name,
-                        *out_exidx_start, *out_exidx_size);
-                return;
-            }
-        }
-    }
-    *out_exidx_start = 0;
-    *out_exidx_size = 0;
-}
-
-void load_ptrace_map_info_data_arch(pid_t pid, map_info_t* mi, map_info_data_t* data) {
-    load_exidx_header(pid, mi, &data->exidx_start, &data->exidx_size);
-}
-
-void free_ptrace_map_info_data_arch(map_info_t* mi, map_info_data_t* data) {
-}
diff --git a/libcorkscrew/arch-mips/backtrace-mips.c b/libcorkscrew/arch-mips/backtrace-mips.c
deleted file mode 100644
index 832fb86..0000000
--- a/libcorkscrew/arch-mips/backtrace-mips.c
+++ /dev/null
@@ -1,901 +0,0 @@
-/*
- * Copyright (C) 2012 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/*
- * Backtracing functions for mips
- */
-
-#define LOG_TAG "Corkscrew"
-//#define LOG_NDEBUG 0
-
-#include "../backtrace-arch.h"
-#include "../backtrace-helper.h"
-#include "../ptrace-arch.h"
-#include <corkscrew/ptrace.h>
-#include "dwarf.h"
-
-#include <stdlib.h>
-#include <signal.h>
-#include <stdbool.h>
-#include <limits.h>
-#include <errno.h>
-#include <string.h>
-#include <sys/ptrace.h>
-#include <cutils/log.h>
-
-#include <sys/ucontext.h>
-
-/* For PTRACE_GETREGS */
-typedef struct {
-    uint64_t regs[32];
-    uint64_t lo;
-    uint64_t hi;
-    uint64_t epc;
-    uint64_t badvaddr;
-    uint64_t status;
-    uint64_t cause;
-} user_regs_struct;
-
-enum {
-    REG_ZERO = 0, REG_AT, REG_V0, REG_V1,
-    REG_A0, REG_A1, REG_A2, REG_A3,
-    REG_T0, REG_T1, REG_T2, REG_T3,
-    REG_T4, REG_T5, REG_T6, REG_T7,
-    REG_S0, REG_S1, REG_S2, REG_S3,
-    REG_S4, REG_S5, REG_S6, REG_S7,
-    REG_T8, REG_T9, REG_K0, REG_K1,
-    REG_GP, REG_SP, REG_S8, REG_RA,
-};
-
-
-/* Unwind state. */
-typedef struct {
-    uint32_t reg[DWARF_REGISTERS];
-} unwind_state_t;
-
-uintptr_t rewind_pc_arch(const memory_t* memory __attribute__((unused)), uintptr_t pc) {
-    if (pc == 0)
-        return pc;
-    if ((pc & 1) == 0)
-        return pc-8;            /* jal/bal/jalr + branch delay slot */
-    return pc;
-}
-
-/* Read byte through 4 byte cache. Usually we read byte by byte and updating cursor. */
-static bool try_get_byte(const memory_t* memory, uintptr_t ptr, uint8_t* out_value, uint32_t* cursor) {
-    static uintptr_t lastptr;
-    static uint32_t buf;
-
-    ptr += *cursor;
-
-    if (ptr < lastptr || lastptr + 3 < ptr) {
-        lastptr = (ptr >> 2) << 2;
-        if (!try_get_word(memory, lastptr, &buf)) {
-            return false;
-        }
-    }
-    *out_value = (uint8_t)((buf >> ((ptr & 3) * 8)) & 0xff);
-    ++*cursor;
-    return true;
-}
-
-/* Getting X bytes. 4 is maximum for now. */
-static bool try_get_xbytes(const memory_t* memory, uintptr_t ptr, uint32_t* out_value, uint8_t bytes, uint32_t* cursor) {
-    uint32_t data = 0;
-    if (bytes > 4) {
-        ALOGE("can't read more than 4 bytes, trying to read %d", bytes);
-        return false;
-    }
-    for (int i = 0; i < bytes; i++) {
-        uint8_t buf;
-        if (!try_get_byte(memory, ptr, &buf, cursor)) {
-            return false;
-        }
-        data |= (uint32_t)buf << (i * 8);
-    }
-    *out_value = data;
-    return true;
-}
-
-/* Reads signed/unsigned LEB128 encoded data. From 1 to 4 bytes. */
-static bool try_get_leb128(const memory_t* memory, uintptr_t ptr, uint32_t* out_value, uint32_t* cursor, bool sign_extend) {
-    uint8_t buf = 0;
-    uint32_t val = 0;
-    uint8_t c = 0;
-    do {
-        if (!try_get_byte(memory, ptr, &buf, cursor)) {
-            return false;
-        }
-        val |= ((uint32_t)buf & 0x7f) << (c * 7);
-        c++;
-    } while (buf & 0x80 && (c * 7) <= 32);
-    if (c * 7 > 32) {
-        ALOGE("%s: data exceeds expected 4 bytes maximum", __FUNCTION__);
-        return false;
-    }
-    if (sign_extend) {
-        if (buf & 0x40) {
-            val |= ((uint32_t)-1 << (c * 7));
-        }
-    }
-    *out_value = val;
-    return true;
-}
-
-/* Reads signed LEB128 encoded data. From 1 to 4 bytes. */
-static bool try_get_sleb128(const memory_t* memory, uintptr_t ptr, uint32_t* out_value, uint32_t* cursor) {
-    return try_get_leb128(memory, ptr, out_value, cursor, true);
-}
-
-/* Reads unsigned LEB128 encoded data. From 1 to 4 bytes. */
-static bool try_get_uleb128(const memory_t* memory, uintptr_t ptr, uint32_t* out_value, uint32_t* cursor) {
-    return try_get_leb128(memory, ptr, out_value, cursor, false);
-}
-
-/* Getting data encoded by dwarf encodings. */
-static bool read_dwarf(const memory_t* memory, uintptr_t ptr, uint32_t* out_value, uint8_t encoding, uint32_t* cursor) {
-    uint32_t data = 0;
-    bool issigned = true;
-    uintptr_t addr = ptr + *cursor;
-    /* Lower 4 bits is data type/size */
-    /* TODO: add more encodings if it becomes necessary */
-    switch (encoding & 0xf) {
-    case DW_EH_PE_absptr:
-        if (!try_get_xbytes(memory, ptr, &data, 4, cursor)) {
-            return false;
-        }
-        *out_value = data;
-        return true;
-    case DW_EH_PE_udata4:
-        issigned = false;
-    case DW_EH_PE_sdata4:
-        if (!try_get_xbytes(memory, ptr, &data, 4, cursor)) {
-            return false;
-        }
-        break;
-    default:
-        ALOGE("unrecognized dwarf lower part encoding: 0x%x", encoding);
-        return false;
-    }
-    /* Higher 4 bits is modifier */
-    /* TODO: add more encodings if it becomes necessary */
-    switch (encoding & 0xf0) {
-    case 0:
-        *out_value = data;
-        break;
-    case DW_EH_PE_pcrel:
-        if (issigned) {
-            *out_value = addr + (int32_t)data;
-        } else {
-            *out_value = addr + data;
-        }
-        break;
-        /* Assuming ptr is correct base to calculate datarel */
-    case DW_EH_PE_datarel:
-        if (issigned) {
-            *out_value = ptr + (int32_t)data;
-        } else {
-            *out_value = ptr + data;
-        }
-        break;
-    default:
-        ALOGE("unrecognized dwarf higher part encoding: 0x%x", encoding);
-        return false;
-    }
-    return true;
-}
-
-/* Having PC find corresponding FDE by reading .eh_frame_hdr section data. */
-static uintptr_t find_fde(const memory_t* memory,
-                          const map_info_t* map_info_list, uintptr_t pc) {
-    if (!pc) {
-        ALOGV("find_fde: pc is zero, no eh_frame");
-        return 0;
-    }
-    const map_info_t* mi = find_map_info(map_info_list, pc);
-    if (!mi) {
-        ALOGV("find_fde: no map info for pc:0x%x", pc);
-        return 0;
-    }
-    const map_info_data_t* midata = mi->data;
-    if (!midata) {
-        ALOGV("find_fde: no eh_frame_hdr for map: start=0x%x, end=0x%x", mi->start, mi->end);
-        return 0;
-    }
-
-    eh_frame_hdr_info_t eh_hdr_info;
-    memset(&eh_hdr_info, 0, sizeof(eh_frame_hdr_info_t));
-
-    /* Getting the first word of eh_frame_hdr:
-       1st byte is version;
-       2nd byte is encoding of pointer to eh_frames;
-       3rd byte is encoding of count of FDEs in lookup table;
-       4th byte is encoding of lookup table entries.
-    */
-    uintptr_t eh_frame_hdr = midata->eh_frame_hdr;
-    uint32_t c = 0;
-    if (!try_get_byte(memory, eh_frame_hdr, &eh_hdr_info.version, &c)) return 0;
-    if (!try_get_byte(memory, eh_frame_hdr, &eh_hdr_info.eh_frame_ptr_enc, &c)) return 0;
-    if (!try_get_byte(memory, eh_frame_hdr, &eh_hdr_info.fde_count_enc, &c)) return 0;
-    if (!try_get_byte(memory, eh_frame_hdr, &eh_hdr_info.fde_table_enc, &c)) return 0;
-
-    /* TODO: 3rd byte can be DW_EH_PE_omit, that means no lookup table available and we should
-       try to parse eh_frame instead. Not sure how often it may occur, skipping now.
-    */
-    if (eh_hdr_info.version != 1) {
-        ALOGV("find_fde: eh_frame_hdr version %d is not supported", eh_hdr_info.version);
-        return 0;
-    }
-    /* Getting the data:
-       2nd word is eh_frame pointer (normally not used, because lookup table has all we need);
-       3rd word is count of FDEs in the lookup table;
-       starting from 4 word there is FDE lookup table (pairs of PC and FDE pointer) sorted by PC;
-    */
-    if (!read_dwarf(memory, eh_frame_hdr, &eh_hdr_info.eh_frame_ptr, eh_hdr_info.eh_frame_ptr_enc, &c)) return 0;
-    if (!read_dwarf(memory, eh_frame_hdr, &eh_hdr_info.fde_count, eh_hdr_info.fde_count_enc, &c)) return 0;
-    ALOGV("find_fde: found %d FDEs", eh_hdr_info.fde_count);
-
-    int32_t low = 0;
-    int32_t high = eh_hdr_info.fde_count;
-    uintptr_t start = 0;
-    uintptr_t fde = 0;
-    /* eh_frame_hdr + c points to lookup table at this point. */
-    while (low <= high) {
-        uint32_t mid = (high + low)/2;
-        uint32_t entry = c + mid * 8;
-        if (!read_dwarf(memory, eh_frame_hdr, &start, eh_hdr_info.fde_table_enc, &entry)) return 0;
-        if (pc <= start) {
-            high = mid - 1;
-        } else {
-            low = mid + 1;
-        }
-    }
-    /* Value found is at high. */
-    if (high < 0) {
-        ALOGV("find_fde: pc %x is out of FDE bounds: %x", pc, start);
-        return 0;
-    }
-    c += high * 8;
-    if (!read_dwarf(memory, eh_frame_hdr, &start, eh_hdr_info.fde_table_enc, &c)) return 0;
-    if (!read_dwarf(memory, eh_frame_hdr, &fde, eh_hdr_info.fde_table_enc, &c)) return 0;
-    ALOGV("pc 0x%x, ENTRY %d: start=0x%x, fde=0x%x", pc, high, start, fde);
-    return fde;
-}
-
-/* Execute single dwarf instruction and update dwarf state accordingly. */
-static bool execute_dwarf(const memory_t* memory, uintptr_t ptr, cie_info_t* cie_info,
-                          dwarf_state_t* dstate, uint32_t* cursor,
-                          dwarf_state_t* stack, uint8_t* stack_ptr) {
-    uint8_t inst;
-    uint8_t op = 0;
-
-    if (!try_get_byte(memory, ptr, &inst, cursor)) {
-        return false;
-    }
-    ALOGV("DW_CFA inst: 0x%x", inst);
-
-    /* For some instructions upper 2 bits is opcode and lower 6 bits is operand. See dwarf-2.0 7.23. */
-    if (inst & 0xc0) {
-        op = inst & 0x3f;
-        inst &= 0xc0;
-    }
-
-    switch ((dwarf_CFA)inst) {
-        uint32_t reg = 0;
-        uint32_t offset = 0;
-    case DW_CFA_advance_loc:
-        dstate->loc += op * cie_info->code_align;
-        ALOGV("DW_CFA_advance_loc: %d to 0x%x", op, dstate->loc);
-        break;
-    case DW_CFA_offset:
-        if (!try_get_uleb128(memory, ptr, &offset, cursor)) return false;
-        dstate->regs[op].rule = 'o';
-        dstate->regs[op].value = offset * cie_info->data_align;
-        ALOGV("DW_CFA_offset: r%d = o(%d)", op, dstate->regs[op].value);
-        break;
-    case DW_CFA_restore:
-        dstate->regs[op].rule = stack->regs[op].rule;
-        dstate->regs[op].value = stack->regs[op].value;
-        ALOGV("DW_CFA_restore: r%d = %c(%d)", op, dstate->regs[op].rule, dstate->regs[op].value);
-        break;
-    case DW_CFA_nop:
-        break;
-    case DW_CFA_set_loc: // probably we don't have it on mips.
-        if (!try_get_xbytes(memory, ptr, &offset, 4, cursor)) return false;
-        if (offset < dstate->loc) {
-            ALOGE("DW_CFA_set_loc: attempt to move location backward");
-            return false;
-        }
-        dstate->loc = offset * cie_info->code_align;
-        ALOGV("DW_CFA_set_loc: %d to 0x%x", offset * cie_info->code_align, dstate->loc);
-        break;
-    case DW_CFA_advance_loc1:
-        if (!try_get_byte(memory, ptr, (uint8_t*)&offset, cursor)) return false;
-        dstate->loc += (uint8_t)offset * cie_info->code_align;
-        ALOGV("DW_CFA_advance_loc1: %d to 0x%x", (uint8_t)offset * cie_info->code_align, dstate->loc);
-        break;
-    case DW_CFA_advance_loc2:
-        if (!try_get_xbytes(memory, ptr, &offset, 2, cursor)) return false;
-        dstate->loc += (uint16_t)offset * cie_info->code_align;
-        ALOGV("DW_CFA_advance_loc2: %d to 0x%x", (uint16_t)offset * cie_info->code_align, dstate->loc);
-        break;
-    case DW_CFA_advance_loc4:
-        if (!try_get_xbytes(memory, ptr, &offset, 4, cursor)) return false;
-        dstate->loc += offset * cie_info->code_align;
-        ALOGV("DW_CFA_advance_loc4: %d to 0x%x", offset * cie_info->code_align, dstate->loc);
-        break;
-    case DW_CFA_offset_extended: // probably we don't have it on mips.
-        if (!try_get_uleb128(memory, ptr, &reg, cursor)) return false;
-        if (!try_get_uleb128(memory, ptr, &offset, cursor)) return false;
-        if (reg >= DWARF_REGISTERS) {
-            ALOGE("DW_CFA_offset_extended: r%d exceeds supported number of registers (%d)", reg, DWARF_REGISTERS);
-            return false;
-        }
-        dstate->regs[reg].rule = 'o';
-        dstate->regs[reg].value = offset * cie_info->data_align;
-        ALOGV("DW_CFA_offset_extended: r%d = o(%d)", reg, dstate->regs[reg].value);
-        break;
-    case DW_CFA_restore_extended: // probably we don't have it on mips.
-        if (!try_get_uleb128(memory, ptr, &reg, cursor)) return false;
-        if (reg >= DWARF_REGISTERS) {
-            ALOGE("DW_CFA_restore_extended: r%d exceeds supported number of registers (%d)", reg, DWARF_REGISTERS);
-            return false;
-        }
-        dstate->regs[reg].rule = stack->regs[reg].rule;
-        dstate->regs[reg].value = stack->regs[reg].value;
-        ALOGV("DW_CFA_restore: r%d = %c(%d)", reg, dstate->regs[reg].rule, dstate->regs[reg].value);
-        break;
-    case DW_CFA_undefined: // probably we don't have it on mips.
-        if (!try_get_uleb128(memory, ptr, &reg, cursor)) return false;
-        if (reg >= DWARF_REGISTERS) {
-            ALOGE("DW_CFA_undefined: r%d exceeds supported number of registers (%d)", reg, DWARF_REGISTERS);
-            return false;
-        }
-        dstate->regs[reg].rule = 'u';
-        dstate->regs[reg].value = 0;
-        ALOGV("DW_CFA_undefined: r%d", reg);
-        break;
-    case DW_CFA_same_value: // probably we don't have it on mips.
-        if (!try_get_uleb128(memory, ptr, &reg, cursor)) return false;
-        if (reg >= DWARF_REGISTERS) {
-            ALOGE("DW_CFA_undefined: r%d exceeds supported number of registers (%d)", reg, DWARF_REGISTERS);
-            return false;
-        }
-        dstate->regs[reg].rule = 's';
-        dstate->regs[reg].value = 0;
-        ALOGV("DW_CFA_same_value: r%d", reg);
-        break;
-    case DW_CFA_register: // probably we don't have it on mips.
-        if (!try_get_uleb128(memory, ptr, &reg, cursor)) return false;
-        /* that's new register actually, not offset */
-        if (!try_get_uleb128(memory, ptr, &offset, cursor)) return false;
-        if (reg >= DWARF_REGISTERS || offset >= DWARF_REGISTERS) {
-            ALOGE("DW_CFA_register: r%d or r%d exceeds supported number of registers (%d)", reg, offset, DWARF_REGISTERS);
-            return false;
-        }
-        dstate->regs[reg].rule = 'r';
-        dstate->regs[reg].value = offset;
-        ALOGV("DW_CFA_register: r%d = r(%d)", reg, dstate->regs[reg].value);
-        break;
-    case DW_CFA_remember_state:
-        if (*stack_ptr == DWARF_STATES_STACK) {
-            ALOGE("DW_CFA_remember_state: states stack overflow %d", *stack_ptr);
-            return false;
-        }
-        stack[(*stack_ptr)++] = *dstate;
-        ALOGV("DW_CFA_remember_state: stacktop moves to %d", *stack_ptr);
-        break;
-    case DW_CFA_restore_state:
-        /* We have CIE state saved at 0 position. It's not supposed to be taken
-           by DW_CFA_restore_state. */
-        if (*stack_ptr == 1) {
-            ALOGE("DW_CFA_restore_state: states stack is empty");
-            return false;
-        }
-        /* Don't touch location on restore. */
-        uintptr_t saveloc = dstate->loc;
-        *dstate = stack[--*stack_ptr];
-        dstate->loc = saveloc;
-        ALOGV("DW_CFA_restore_state: stacktop moves to %d", *stack_ptr);
-        break;
-    case DW_CFA_def_cfa:
-        if (!try_get_uleb128(memory, ptr, &reg, cursor)) return false;
-        if (!try_get_uleb128(memory, ptr, &offset, cursor)) return false;
-        dstate->cfa_reg = reg;
-        dstate->cfa_off = offset;
-        ALOGV("DW_CFA_def_cfa: %x(r%d)", offset, reg);
-        break;
-    case DW_CFA_def_cfa_register:
-        if (!try_get_uleb128(memory, ptr, &reg, cursor)) {
-            return false;
-        }
-        dstate->cfa_reg = reg;
-        ALOGV("DW_CFA_def_cfa_register: r%d", reg);
-        break;
-    case DW_CFA_def_cfa_offset:
-        if (!try_get_uleb128(memory, ptr, &offset, cursor)) {
-            return false;
-        }
-        dstate->cfa_off = offset;
-        ALOGV("DW_CFA_def_cfa_offset: %x", offset);
-        break;
-    default:
-        ALOGE("unrecognized DW_CFA_* instruction: 0x%x", inst);
-        return false;
-    }
-    return true;
-}
-
-/* Restoring particular register value based on dwarf state. */
-static bool get_old_register_value(const memory_t* memory, uint32_t cfa,
-                                   dwarf_state_t* dstate, uint8_t reg,
-                                   unwind_state_t* state, unwind_state_t* newstate) {
-    uint32_t addr;
-    switch (dstate->regs[reg].rule) {
-    case 0:
-        /* We don't have dstate updated for this register, so assuming value kept the same.
-           Normally we should look into state and return current value as the old one
-           but we don't have all registers in state to handle this properly */
-        ALOGV("get_old_register_value: value of r%d is the same", reg);
-        // for SP if it's not updated by dwarf rule we assume it's equal to CFA
-        // for PC if it's not updated by dwarf rule we assume it's equal to RA
-        if (reg == DWARF_SP) {
-            ALOGV("get_old_register_value: adjusting sp to CFA: 0x%x", cfa);
-            newstate->reg[reg] = cfa;
-        } else if (reg == DWARF_PC) {
-            ALOGV("get_old_register_value: adjusting PC to RA: 0x%x", newstate->reg[DWARF_RA]);
-            newstate->reg[reg] = newstate->reg[DWARF_RA];
-        } else {
-            newstate->reg[reg] = state->reg[reg];
-        }
-        break;
-    case 'o':
-        addr = cfa + (int32_t)dstate->regs[reg].value;
-        if (!try_get_word(memory, addr, &newstate->reg[reg])) {
-            ALOGE("get_old_register_value: can't read from 0x%x", addr);
-            return false;
-        }
-        ALOGV("get_old_register_value: r%d at 0x%x is 0x%x", reg, addr, newstate->reg[reg]);
-        break;
-    case 'r':
-        /* We don't have all registers in state so don't even try to look at 'r' */
-        ALOGE("get_old_register_value: register lookup not implemented yet");
-        break;
-    default:
-        ALOGE("get_old_register_value: unexpected rule:%c value:%d for register %d",
-              dstate->regs[reg].rule, (int32_t)dstate->regs[reg].value, reg);
-        return false;
-    }
-    return true;
-}
-
-/* Updaing state based on dwarf state. */
-static bool update_state(const memory_t* memory, unwind_state_t* state,
-                         dwarf_state_t* dstate) {
-    unwind_state_t newstate;
-    /* We can restore more registers here if we need them. Meanwile doing minimal work here. */
-    /* Getting CFA. */
-    uintptr_t cfa = 0;
-    if (dstate->cfa_reg == DWARF_SP) {
-        cfa = state->reg[DWARF_SP] + dstate->cfa_off;
-    } else if (dstate->cfa_reg == DWARF_FP) {
-        cfa = state->reg[DWARF_FP] + dstate->cfa_off;
-    } else {
-        ALOGE("update_state: unexpected CFA register: %d", dstate->cfa_reg);
-        return false;
-    }
-    ALOGV("update_state: new CFA: 0x%x", cfa);
-
-    /* Update registers. Order is important to allow RA to propagate to PC */
-    /* Getting FP. */
-    if (!get_old_register_value(memory, cfa, dstate, DWARF_FP, state, &newstate)) return false;
-    /* Getting SP. */
-    if (!get_old_register_value(memory, cfa, dstate, DWARF_SP, state, &newstate)) return false;
-    /* Getting RA. */
-    if (!get_old_register_value(memory, cfa, dstate, DWARF_RA, state, &newstate)) return false;
-    /* Getting PC. */
-    if (!get_old_register_value(memory, cfa, dstate, DWARF_PC, state, &newstate)) return false;
-
-    ALOGV("update_state: PC: 0x%x; restore PC: 0x%x", state->reg[DWARF_PC], newstate.reg[DWARF_PC]);
-    ALOGV("update_state: RA: 0x%x; restore RA: 0x%x", state->reg[DWARF_RA], newstate.reg[DWARF_RA]);
-    ALOGV("update_state: FP: 0x%x; restore FP: 0x%x", state->reg[DWARF_FP], newstate.reg[DWARF_FP]);
-    ALOGV("update_state: SP: 0x%x; restore SP: 0x%x", state->reg[DWARF_SP], newstate.reg[DWARF_SP]);
-
-    if (newstate.reg[DWARF_PC] == 0)
-        return false;
-
-    /* End backtrace if registers do not change */
-    if ((state->reg[DWARF_PC] == newstate.reg[DWARF_PC]) &&
-        (state->reg[DWARF_RA] == newstate.reg[DWARF_RA]) &&
-        (state->reg[DWARF_FP] == newstate.reg[DWARF_FP]) &&
-        (state->reg[DWARF_SP] == newstate.reg[DWARF_SP]))
-        return false;
-
-    *state = newstate;
-    return true;
-}
-
-/* Execute CIE and FDE instructions for FDE found with find_fde. */
-static bool execute_fde(const memory_t* memory,
-                        uintptr_t fde,
-                        unwind_state_t* state) {
-    uint32_t fde_length = 0;
-    uint32_t cie_length = 0;
-    uintptr_t cie = 0;
-    uintptr_t cie_offset = 0;
-    cie_info_t cie_i;
-    cie_info_t* cie_info = &cie_i;
-    fde_info_t fde_i;
-    fde_info_t* fde_info = &fde_i;
-    dwarf_state_t dwarf_state;
-    dwarf_state_t* dstate = &dwarf_state;
-    dwarf_state_t stack[DWARF_STATES_STACK];
-    uint8_t stack_ptr = 0;
-
-    memset(dstate, 0, sizeof(dwarf_state_t));
-    memset(cie_info, 0, sizeof(cie_info_t));
-    memset(fde_info, 0, sizeof(fde_info_t));
-
-    /* Read common CIE or FDE area:
-       1st word is length;
-       2nd word is ID: 0 for CIE, CIE pointer for FDE.
-    */
-    if (!try_get_word(memory, fde, &fde_length)) {
-        return false;
-    }
-    if ((int32_t)fde_length == -1) {
-        ALOGV("execute_fde: 64-bit dwarf detected, not implemented yet");
-        return false;
-    }
-    if (!try_get_word(memory, fde + 4, &cie_offset)) {
-        return false;
-    }
-    if (cie_offset == 0) {
-        /* This is CIE. We shouldn't be here normally. */
-        cie = fde;
-        cie_length = fde_length;
-    } else {
-        /* Find CIE. */
-        /* Positive cie_offset goes backward from current field. */
-        cie = fde + 4 - cie_offset;
-        if (!try_get_word(memory, cie, &cie_length)) {
-            return false;
-        }
-        if ((int32_t)cie_length == -1) {
-            ALOGV("execute_fde: 64-bit dwarf detected, not implemented yet");
-            return false;
-        }
-        if (!try_get_word(memory, cie + 4, &cie_offset)) {
-            return false;
-        }
-        if (cie_offset != 0) {
-            ALOGV("execute_fde: can't find CIE");
-            return false;
-        }
-    }
-    ALOGV("execute_fde: FDE length: %d", fde_length);
-    ALOGV("execute_fde: CIE pointer: %x", cie);
-    ALOGV("execute_fde: CIE length: %d", cie_length);
-
-    /* Read CIE:
-       Augmentation independent:
-       1st byte is version;
-       next x bytes is /0 terminated augmentation string;
-       next x bytes is unsigned LEB128 encoded code alignment factor;
-       next x bytes is signed LEB128 encoded data alignment factor;
-       next 1 (CIE version 1) or x (CIE version 3 unsigned LEB128) bytes is return register column;
-       Augmentation dependent:
-       if 'z' next x bytes is unsigned LEB128 encoded augmentation data size;
-       if 'L' next 1 byte is LSDA encoding;
-       if 'R' next 1 byte is FDE encoding;
-       if 'S' CIE represents signal handler stack frame;
-       if 'P' next 1 byte is personality encoding folowed by personality function pointer;
-       Next x bytes is CIE program.
-    */
-
-    uint32_t c = 8;
-    if (!try_get_byte(memory, cie, &cie_info->version, &c)) {
-        return false;
-    }
-    ALOGV("execute_fde: CIE version: %d", cie_info->version);
-    uint8_t ch;
-    do {
-        if (!try_get_byte(memory, cie, &ch, &c)) {
-            return false;
-        }
-        switch (ch) {
-        case '\0': break;
-        case 'z': cie_info->aug_z = 1; break;
-        case 'L': cie_info->aug_L = 1; break;
-        case 'R': cie_info->aug_R = 1; break;
-        case 'S': cie_info->aug_S = 1; break;
-        case 'P': cie_info->aug_P = 1; break;
-        default:
-            ALOGV("execute_fde: Unrecognized CIE augmentation char: '%c'", ch);
-            return false;
-            break;
-        }
-    } while (ch);
-    if (!try_get_uleb128(memory, cie, &cie_info->code_align, &c)) {
-        return false;
-    }
-    if (!try_get_sleb128(memory, cie, &cie_info->data_align, &c)) {
-        return false;
-    }
-    if (cie_info->version >= 3) {
-        if (!try_get_uleb128(memory, cie, &cie_info->reg, &c)) {
-            return false;
-        }
-    } else {
-        if (!try_get_byte(memory, cie, (uint8_t*)&cie_info->reg, &c)) {
-            return false;
-        }
-    }
-    ALOGV("execute_fde: CIE code alignment factor: %d", cie_info->code_align);
-    ALOGV("execute_fde: CIE data alignment factor: %d", cie_info->data_align);
-    if (cie_info->aug_z) {
-        if (!try_get_uleb128(memory, cie, &cie_info->aug_z, &c)) {
-            return false;
-        }
-    }
-    if (cie_info->aug_L) {
-        if (!try_get_byte(memory, cie, &cie_info->aug_L, &c)) {
-            return false;
-        }
-    } else {
-        /* Default encoding. */
-        cie_info->aug_L = DW_EH_PE_absptr;
-    }
-    if (cie_info->aug_R) {
-        if (!try_get_byte(memory, cie, &cie_info->aug_R, &c)) {
-            return false;
-        }
-    } else {
-        /* Default encoding. */
-        cie_info->aug_R = DW_EH_PE_absptr;
-    }
-    if (cie_info->aug_P) {
-        /* Get encoding of personality routine pointer. We don't use it now. */
-        if (!try_get_byte(memory, cie, (uint8_t*)&cie_info->aug_P, &c)) {
-            return false;
-        }
-        /* Get routine pointer. */
-        if (!read_dwarf(memory, cie, &cie_info->aug_P, (uint8_t)cie_info->aug_P, &c)) {
-            return false;
-        }
-    }
-    /* CIE program. */
-    /* Length field itself (4 bytes) is not included into length. */
-    stack[0] = *dstate;
-    stack_ptr = 1;
-    while (c < cie_length + 4) {
-        if (!execute_dwarf(memory, cie, cie_info, dstate, &c, stack, &stack_ptr)) {
-            return false;
-        }
-    }
-
-    /* We went directly to CIE. Normally it shouldn't occur. */
-    if (cie == fde) return true;
-
-    /* Go back to FDE. */
-    c = 8;
-    /* Read FDE:
-       Augmentation independent:
-       next x bytes (encoded as specified in CIE) is FDE starting address;
-       next x bytes (encoded as specified in CIE) is FDE number of instructions covered;
-       Augmentation dependent:
-       if 'z' next x bytes is unsigned LEB128 encoded augmentation data size;
-       if 'L' next x bytes is LSDA pointer (encoded as specified in CIE);
-       Next x bytes is FDE program.
-    */
-    if (!read_dwarf(memory, fde, &fde_info->start, (uint8_t)cie_info->aug_R, &c)) {
-        return false;
-    }
-    dstate->loc = fde_info->start;
-    ALOGV("execute_fde: FDE start: %x", dstate->loc);
-    if (!read_dwarf(memory, fde, &fde_info->length, 0, &c)) {
-        return false;
-    }
-    ALOGV("execute_fde: FDE length: %x", fde_info->length);
-    if (cie_info->aug_z) {
-        if (!try_get_uleb128(memory, fde, &fde_info->aug_z, &c)) {
-            return false;
-        }
-    }
-    if (cie_info->aug_L && cie_info->aug_L != DW_EH_PE_omit) {
-        if (!read_dwarf(memory, fde, &fde_info->aug_L, cie_info->aug_L, &c)) {
-            return false;
-        }
-    }
-    /* FDE program. */
-    /* Length field itself (4 bytes) is not included into length. */
-    /* Save CIE state as 0 element of stack. Used by DW_CFA_restore. */
-    stack[0] = *dstate;
-    stack_ptr = 1;
-    while (c < fde_length + 4 && state->reg[DWARF_PC] >= dstate->loc) {
-        if (!execute_dwarf(memory, fde, cie_info, dstate, &c, stack, &stack_ptr)) {
-            return false;
-        }
-        ALOGV("PC: %x, LOC: %x", state->reg[DWARF_PC], dstate->loc);
-    }
-
-    return update_state(memory, state, dstate);
-}
-
-static bool heuristic_state_update(const memory_t* memory, unwind_state_t* state)
-{
-    bool found_start = false;
-    int maxcheck = 1024;
-    int32_t stack_size = 0;
-    int32_t ra_offset = 0;
-    dwarf_state_t dwarf_state;
-    dwarf_state_t* dstate = &dwarf_state;
-
-    static struct {
-        uint32_t insn;
-        uint32_t mask;
-    } frame0sig[] = {
-        {0x3c1c0000, 0xffff0000}, /* lui     gp,xxxx */
-        {0x279c0000, 0xffff0000}, /* addiu   gp,gp,xxxx */
-        {0x039fe021, 0xffffffff}, /* addu    gp,gp,ra */
-    };
-    const int nframe0sig = sizeof(frame0sig)/sizeof(frame0sig[0]);
-    int f0 = nframe0sig;
-    memset(dstate, 0, sizeof(dwarf_state_t));
-
-    /* Search code backwards looking for function prologue */
-    for (uint32_t pc = state->reg[DWARF_PC]-4; maxcheck-- > 0 && !found_start; pc -= 4) {
-        uint32_t op;
-        int32_t immediate;
-
-        if (!try_get_word(memory, pc, &op))
-            return false;
-
-        // ALOGV("@0x%08x: 0x%08x\n", pc, op);
-
-        // Check for frame 0 signature
-        if ((op & frame0sig[f0].mask) == frame0sig[f0].insn) {
-            if (f0 == 0)
-                return false;
-            f0--;
-        }
-        else {
-            f0 = nframe0sig;
-        }
-
-        switch (op & 0xffff0000) {
-        case 0x27bd0000: // addiu sp, imm
-            // looking for stack being decremented
-            immediate = (((int32_t)op) << 16) >> 16;
-            if (immediate < 0) {
-                stack_size = -immediate;
-                ALOGV("@0x%08x: found stack adjustment=%d\n", pc, stack_size);
-            }
-            break;
-        case 0x039f0000: // e021
-
-        case 0xafbf0000: // sw ra, imm(sp)
-            ra_offset = (((int32_t)op) << 16) >> 16;
-            ALOGV("@0x%08x: found ra offset=%d\n", pc, ra_offset);
-            break;
-        case 0x3c1c0000: // lui gp
-            ALOGV("@0x%08x: found function boundary", pc);
-            found_start = true;
-            break;
-        default:
-            break;
-        }
-    }
-
-    dstate->cfa_reg = DWARF_SP;
-    dstate->cfa_off = stack_size;
-
-    if (ra_offset) {
-        dstate->regs[DWARF_RA].rule = 'o';
-        dstate->regs[DWARF_RA].value = -stack_size + ra_offset;
-    }
-
-    return update_state(memory, state, dstate);
-}
-
-static ssize_t unwind_backtrace_common(const memory_t* memory,
-        const map_info_t* map_info_list,
-        unwind_state_t* state, backtrace_frame_t* backtrace,
-        size_t ignore_depth, size_t max_depth) {
-
-    size_t ignored_frames = 0;
-    size_t returned_frames = 0;
-
-    ALOGV("Unwinding tid: %d", memory->tid);
-    ALOGV("PC: %x", state->reg[DWARF_PC]);
-    ALOGV("RA: %x", state->reg[DWARF_RA]);
-    ALOGV("FP: %x", state->reg[DWARF_FP]);
-    ALOGV("SP: %x", state->reg[DWARF_SP]);
-
-    for (size_t index = 0; returned_frames < max_depth; index++) {
-        uintptr_t fde = find_fde(memory, map_info_list, state->reg[DWARF_PC]);
-        backtrace_frame_t* frame = add_backtrace_entry(
-            index ? rewind_pc_arch(memory, state->reg[DWARF_PC]) : state->reg[DWARF_PC],
-            backtrace, ignore_depth, max_depth,
-            &ignored_frames, &returned_frames);
-        uint32_t stack_top = state->reg[DWARF_SP];
-
-        if (fde) {
-            /* Use FDE to update state */
-            if (!execute_fde(memory, fde, state))
-                break;
-        }
-        else {
-            /* FDE is not found, update state heuristically */
-            if (!heuristic_state_update(memory, state))
-                break;
-        }
-
-        if (frame) {
-            frame->stack_top = stack_top;
-            if (stack_top < state->reg[DWARF_SP]) {
-                frame->stack_size = state->reg[DWARF_SP] - stack_top;
-            }
-        }
-        ALOGV("Stack: 0x%x ... 0x%x - %d bytes", frame->stack_top, state->reg[DWARF_SP], frame->stack_size);
-    }
-    return returned_frames;
-}
-
-ssize_t unwind_backtrace_signal_arch(siginfo_t* siginfo __attribute__((unused)), void* sigcontext,
-        const map_info_t* map_info_list,
-        backtrace_frame_t* backtrace, size_t ignore_depth, size_t max_depth) {
-    const ucontext_t* uc = (const ucontext_t*)sigcontext;
-
-    unwind_state_t state;
-    state.reg[DWARF_PC] = uc->uc_mcontext.pc;
-    state.reg[DWARF_RA] = uc->uc_mcontext.gregs[REG_RA];
-    state.reg[DWARF_FP] = uc->uc_mcontext.gregs[REG_S8];
-    state.reg[DWARF_SP] = uc->uc_mcontext.gregs[REG_SP];
-
-    ALOGV("unwind_backtrace_signal_arch: "
-          "ignore_depth=%d max_depth=%d pc=0x%08x sp=0x%08x ra=0x%08x\n",
-          ignore_depth, max_depth, state.reg[DWARF_PC], state.reg[DWARF_SP], state.reg[DWARF_RA]);
-
-    memory_t memory;
-    init_memory(&memory, map_info_list);
-    return unwind_backtrace_common(&memory, map_info_list,
-                                   &state, backtrace, ignore_depth, max_depth);
-}
-
-ssize_t unwind_backtrace_ptrace_arch(pid_t tid, const ptrace_context_t* context,
-        backtrace_frame_t* backtrace, size_t ignore_depth, size_t max_depth) {
-
-    user_regs_struct regs;
-    if (ptrace(PTRACE_GETREGS, tid, 0, &regs)) {
-        return -1;
-    }
-
-    unwind_state_t state;
-    state.reg[DWARF_PC] = regs.epc;
-    state.reg[DWARF_RA] = regs.regs[REG_RA];
-    state.reg[DWARF_FP] = regs.regs[REG_S8];
-    state.reg[DWARF_SP] = regs.regs[REG_SP];
-
-    ALOGV("unwind_backtrace_ptrace_arch: "
-          "ignore_depth=%d max_depth=%d pc=0x%08x sp=0x%08x ra=0x%08x\n",
-          ignore_depth, max_depth, state.reg[DWARF_PC], state.reg[DWARF_SP], state.reg[DWARF_RA]);
-
-    memory_t memory;
-    init_memory_ptrace(&memory, tid);
-    return unwind_backtrace_common(&memory, context->map_info_list,
-                                   &state, backtrace, ignore_depth, max_depth);
-}
diff --git a/libcorkscrew/arch-mips/dwarf.h b/libcorkscrew/arch-mips/dwarf.h
deleted file mode 100644
index 8504ea0..0000000
--- a/libcorkscrew/arch-mips/dwarf.h
+++ /dev/null
@@ -1,187 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/*
- * Dwarf2 data encoding flags.
- */
-
-#define DW_EH_PE_absptr         0x00
-#define DW_EH_PE_omit           0xff
-#define DW_EH_PE_uleb128        0x01
-#define DW_EH_PE_udata2         0x02
-#define DW_EH_PE_udata4         0x03
-#define DW_EH_PE_udata8         0x04
-#define DW_EH_PE_sleb128        0x09
-#define DW_EH_PE_sdata2         0x0A
-#define DW_EH_PE_sdata4         0x0B
-#define DW_EH_PE_sdata8         0x0C
-#define DW_EH_PE_signed         0x08
-#define DW_EH_PE_pcrel          0x10
-#define DW_EH_PE_textrel        0x20
-#define DW_EH_PE_datarel        0x30
-#define DW_EH_PE_funcrel        0x40
-#define DW_EH_PE_aligned        0x50
-#define DW_EH_PE_indirect       0x80
-
-/*
- * Dwarf2 call frame instructions.
- */
-
-typedef enum {
-    DW_CFA_advance_loc = 0x40,
-    DW_CFA_offset = 0x80,
-    DW_CFA_restore = 0xc0,
-    DW_CFA_nop = 0x00,
-    DW_CFA_set_loc = 0x01,
-    DW_CFA_advance_loc1 = 0x02,
-    DW_CFA_advance_loc2 = 0x03,
-    DW_CFA_advance_loc4 = 0x04,
-    DW_CFA_offset_extended = 0x05,
-    DW_CFA_restore_extended = 0x06,
-    DW_CFA_undefined = 0x07,
-    DW_CFA_same_value = 0x08,
-    DW_CFA_register = 0x09,
-    DW_CFA_remember_state = 0x0a,
-    DW_CFA_restore_state = 0x0b,
-    DW_CFA_def_cfa = 0x0c,
-    DW_CFA_def_cfa_register = 0x0d,
-    DW_CFA_def_cfa_offset = 0x0e
-} dwarf_CFA;
-
-/*
- * eh_frame_hdr information.
-*/
-
-typedef struct {
-      uint8_t version;
-      uint8_t eh_frame_ptr_enc;
-      uint8_t fde_count_enc;
-      uint8_t fde_table_enc;
-      uintptr_t eh_frame_ptr;
-      uint32_t fde_count;
-} eh_frame_hdr_info_t;
-
-/*
- * CIE information.
-*/
-
-typedef struct {
-      uint8_t version;
-      uint32_t code_align;
-      uint32_t data_align;
-      uint32_t reg;
-      uint32_t aug_z;
-      uint8_t aug_L;
-      uint8_t aug_R;
-      uint8_t aug_S;
-      uint32_t aug_P;
-} cie_info_t;
-
-/*
- * FDE information.
-*/
-
-typedef struct {
-      uint32_t start;
-      uint32_t length; // number of instructions covered by FDE
-      uint32_t aug_z;
-      uint32_t aug_L;
-} fde_info_t;
-
-/*
- * Dwarf state.
-*/
-
-/* Stack of states: required for DW_CFA_remember_state/DW_CFA_restore_state
-   30 should be enough */
-#define DWARF_STATES_STACK 30
-
-typedef struct {
-    char rule;         // rule: o - offset(value); r - register(value)
-    uint32_t value;    // value
-} reg_rule_t;
-
-/* Dwarf preserved number of registers for mips */
-typedef enum
-  {
-    UNW_MIPS_R0,
-    UNW_MIPS_R1,
-    UNW_MIPS_R2,
-    UNW_MIPS_R3,
-    UNW_MIPS_R4,
-    UNW_MIPS_R5,
-    UNW_MIPS_R6,
-    UNW_MIPS_R7,
-    UNW_MIPS_R8,
-    UNW_MIPS_R9,
-    UNW_MIPS_R10,
-    UNW_MIPS_R11,
-    UNW_MIPS_R12,
-    UNW_MIPS_R13,
-    UNW_MIPS_R14,
-    UNW_MIPS_R15,
-    UNW_MIPS_R16,
-    UNW_MIPS_R17,
-    UNW_MIPS_R18,
-    UNW_MIPS_R19,
-    UNW_MIPS_R20,
-    UNW_MIPS_R21,
-    UNW_MIPS_R22,
-    UNW_MIPS_R23,
-    UNW_MIPS_R24,
-    UNW_MIPS_R25,
-    UNW_MIPS_R26,
-    UNW_MIPS_R27,
-    UNW_MIPS_R28,
-    UNW_MIPS_R29,
-    UNW_MIPS_R30,
-    UNW_MIPS_R31,
-
-    UNW_MIPS_PC = 34,
-
-    /* FIXME: Other registers!  */
-
-    /* For MIPS, the CFA is the value of SP (r29) at the call site in the
-       previous frame.  */
-    UNW_MIPS_CFA,
-
-    UNW_TDEP_LASTREG,
-
-    UNW_TDEP_LAST_REG = UNW_MIPS_R31,
-
-    UNW_TDEP_IP = UNW_MIPS_R31,
-    UNW_TDEP_SP = UNW_MIPS_R29,
-    UNW_TDEP_EH = UNW_MIPS_R0   /* FIXME.  */
-
-  }
-mips_regnum_t;
-
-#define DWARF_REGISTERS UNW_TDEP_LASTREG
-
-typedef struct {
-    uintptr_t loc;     // location (ip)
-    uint8_t cfa_reg;   // index of register where CFA location stored
-    intptr_t cfa_off;  // offset
-    reg_rule_t regs[DWARF_REGISTERS]; // dwarf preserved registers for mips
-} dwarf_state_t;
-
-/* DWARF registers we are caring about. */
-
-
-#define DWARF_SP      UNW_MIPS_R29
-#define DWARF_RA      UNW_MIPS_R31
-#define DWARF_PC      UNW_MIPS_PC
-#define DWARF_FP      UNW_MIPS_CFA /* FIXME is this correct? */
diff --git a/libcorkscrew/arch-mips/ptrace-mips.c b/libcorkscrew/arch-mips/ptrace-mips.c
deleted file mode 100644
index ba3b60a..0000000
--- a/libcorkscrew/arch-mips/ptrace-mips.c
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "Corkscrew"
-//#define LOG_NDEBUG 0
-
-#include "../ptrace-arch.h"
-
-#include <stddef.h>
-#include <elf.h>
-#include <cutils/log.h>
-
-static void load_eh_frame_hdr(pid_t pid, map_info_t* mi, uintptr_t *eh_frame_hdr) {
-    uint32_t elf_phoff;
-    uint32_t elf_phentsize_ehsize;
-    uint32_t elf_shentsize_phnum;
-
-
-    try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_phoff), &elf_phoff);
-    ALOGV("reading 0x%08x elf_phoff:%x",  mi->start + offsetof(Elf32_Ehdr, e_phoff), elf_phoff);
-    try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_ehsize), &elf_phentsize_ehsize);
-    ALOGV("reading 0x%08x elf_phentsize_ehsize:%x", mi->start + offsetof(Elf32_Ehdr, e_ehsize), elf_phentsize_ehsize);
-    try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_phnum), &elf_shentsize_phnum);
-    ALOGV("reading 0x%08x elf_shentsize_phnum:%x", mi->start + offsetof(Elf32_Ehdr, e_phnum), elf_shentsize_phnum);
-
-
-
-    if (try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_phoff), &elf_phoff)
-            && try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_ehsize),
-                    &elf_phentsize_ehsize)
-            && try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_phnum),
-                    &elf_shentsize_phnum)) {
-        uint32_t elf_phentsize = elf_phentsize_ehsize >> 16;
-        uint32_t elf_phnum = elf_shentsize_phnum & 0xffff;
-        for (uint32_t i = 0; i < elf_phnum; i++) {
-            uintptr_t elf_phdr = mi->start + elf_phoff + i * elf_phentsize;
-            uint32_t elf_phdr_type;
-            if (!try_get_word_ptrace(pid, elf_phdr + offsetof(Elf32_Phdr, p_type), &elf_phdr_type)) {
-                break;
-            }
-            if (elf_phdr_type == PT_GNU_EH_FRAME) {
-                uint32_t elf_phdr_offset;
-                if (!try_get_word_ptrace(pid, elf_phdr + offsetof(Elf32_Phdr, p_offset),
-                        &elf_phdr_offset)) {
-                    break;
-                }
-                *eh_frame_hdr = mi->start + elf_phdr_offset;
-                ALOGV("Parsed .eh_frame_hdr info for %s: start=0x%08x", mi->name, *eh_frame_hdr);
-                return;
-            }
-        }
-    }
-    *eh_frame_hdr = 0;
-}
-
-void load_ptrace_map_info_data_arch(pid_t pid, map_info_t* mi, map_info_data_t* data) {
-    ALOGV("load_ptrace_map_info_data_arch");
-    load_eh_frame_hdr(pid, mi, &data->eh_frame_hdr);
-}
-
-void free_ptrace_map_info_data_arch(map_info_t* mi __attribute__((unused)),
-                                    map_info_data_t* data __attribute__((unused))) {
-    ALOGV("free_ptrace_map_info_data_arch");
-}
diff --git a/libcorkscrew/arch-x86/backtrace-x86.c b/libcorkscrew/arch-x86/backtrace-x86.c
deleted file mode 100755
index df486de..0000000
--- a/libcorkscrew/arch-x86/backtrace-x86.c
+++ /dev/null
@@ -1,823 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/*
- * Backtracing functions for x86.
- */
-
-#define LOG_TAG "Corkscrew"
-//#define LOG_NDEBUG 0
-
-#include "../backtrace-arch.h"
-#include "../backtrace-helper.h"
-#include "../ptrace-arch.h"
-#include <corkscrew/ptrace.h>
-#include "dwarf.h"
-
-#include <stdlib.h>
-#include <signal.h>
-#include <stdbool.h>
-#include <limits.h>
-#include <errno.h>
-#include <string.h>
-#include <sys/ptrace.h>
-#include <cutils/log.h>
-
-#if defined(__APPLE__)
-
-#define _XOPEN_SOURCE
-#include <ucontext.h>
-
-#else
-
-// glibc has its own renaming of the Linux kernel's structures.
-#define __USE_GNU // For REG_EBP, REG_ESP, and REG_EIP.
-#include <ucontext.h>
-
-#endif
-
-/* Unwind state. */
-typedef struct {
-    uint32_t reg[DWARF_REGISTERS];
-} unwind_state_t;
-
-typedef struct {
-    backtrace_frame_t* backtrace;
-    size_t ignore_depth;
-    size_t max_depth;
-    size_t ignored_frames;
-    size_t returned_frames;
-    memory_t memory;
-} backtrace_state_t;
-
-uintptr_t rewind_pc_arch(const memory_t* memory __attribute__((unused)), uintptr_t pc) {
-    /* TODO: x86 instructions are 1-16 bytes, to define exact size of previous instruction
-       we have to disassemble from the function entry point up to pc.
-       Returning pc-1 is probably enough for now, the only drawback is that
-       it points somewhere between the first byte of instruction we are looking for and
-       the first byte of the next instruction. */
-
-    return pc-1;
-    /* TODO: We should adjust that for the signal frames and return pc for them instead of pc-1.
-       To recognize signal frames we should read cie_info property. */
-}
-
-/* Read byte through 4 byte cache. Usually we read byte by byte and updating cursor. */
-static bool try_get_byte(const memory_t* memory, uintptr_t ptr, uint8_t* out_value, uint32_t* cursor) {
-    static uintptr_t lastptr;
-    static uint32_t buf;
-
-    ptr += *cursor;
-
-    if (ptr < lastptr || lastptr + 3 < ptr) {
-        lastptr = (ptr >> 2) << 2;
-        if (!try_get_word(memory, lastptr, &buf)) {
-            return false;
-        }
-    }
-    *out_value = (uint8_t)((buf >> ((ptr & 3) * 8)) & 0xff);
-    ++*cursor;
-    return true;
-}
-
-/* Getting X bytes. 4 is maximum for now. */
-static bool try_get_xbytes(const memory_t* memory, uintptr_t ptr, uint32_t* out_value, uint8_t bytes, uint32_t* cursor) {
-    uint32_t data = 0;
-    if (bytes > 4) {
-        ALOGE("can't read more than 4 bytes, trying to read %d", bytes);
-        return false;
-    }
-    for (int i = 0; i < bytes; i++) {
-        uint8_t buf;
-        if (!try_get_byte(memory, ptr, &buf, cursor)) {
-            return false;
-        }
-        data |= (uint32_t)buf << (i * 8);
-    }
-    *out_value = data;
-    return true;
-}
-
-/* Reads signed/unsigned LEB128 encoded data. From 1 to 4 bytes. */
-static bool try_get_leb128(const memory_t* memory, uintptr_t ptr, uint32_t* out_value, uint32_t* cursor, bool sign_extend) {
-    uint8_t buf = 0;
-    uint32_t val = 0;
-    uint8_t c = 0;
-    do {
-       if (!try_get_byte(memory, ptr, &buf, cursor)) {
-           return false;
-       }
-       val |= ((uint32_t)buf & 0x7f) << (c * 7);
-       c++;
-    } while (buf & 0x80 && (c * 7) <= 32);
-    if (c * 7 > 32) {
-       ALOGE("%s: data exceeds expected 4 bytes maximum", __FUNCTION__);
-       return false;
-    }
-    if (sign_extend) {
-        if (buf & 0x40) {
-            val |= ((uint32_t)-1 << (c * 7));
-        }
-    }
-    *out_value = val;
-    return true;
-}
-
-/* Reads signed LEB128 encoded data. From 1 to 4 bytes. */
-static bool try_get_sleb128(const memory_t* memory, uintptr_t ptr, uint32_t* out_value, uint32_t* cursor) {
-  return try_get_leb128(memory, ptr, out_value, cursor, true);
-}
-
-/* Reads unsigned LEB128 encoded data. From 1 to 4 bytes. */
-static bool try_get_uleb128(const memory_t* memory, uintptr_t ptr, uint32_t* out_value, uint32_t* cursor) {
-  return try_get_leb128(memory, ptr, out_value, cursor, false);
-}
-
-/* Getting data encoded by dwarf encodings. */
-static bool read_dwarf(const memory_t* memory, uintptr_t ptr, uint32_t* out_value, uint8_t encoding, uint32_t* cursor) {
-    uint32_t data = 0;
-    bool issigned = true;
-    uintptr_t addr = ptr + *cursor;
-    /* Lower 4 bits is data type/size */
-    /* TODO: add more encodings if it becomes necessary */
-    switch (encoding & 0xf) {
-        case DW_EH_PE_absptr:
-            if (!try_get_xbytes(memory, ptr, &data, 4, cursor)) {
-                return false;
-            }
-            *out_value = data;
-            return true;
-        case DW_EH_PE_udata4:
-            issigned = false;
-        case DW_EH_PE_sdata4:
-            if (!try_get_xbytes(memory, ptr, &data, 4, cursor)) {
-                return false;
-            }
-            break;
-        default:
-            ALOGE("unrecognized dwarf lower part encoding: 0x%x", encoding);
-            return false;
-    }
-    /* Higher 4 bits is modifier */
-    /* TODO: add more encodings if it becomes necessary */
-    switch (encoding & 0xf0) {
-        case 0:
-            *out_value = data;
-            break;
-        case DW_EH_PE_pcrel:
-            if (issigned) {
-                *out_value = addr + (int32_t)data;
-            } else {
-                *out_value = addr + data;
-            }
-            break;
-        /* Assuming ptr is correct base to calculate datarel */
-        case DW_EH_PE_datarel:
-            if (issigned) {
-                *out_value = ptr + (int32_t)data;
-            } else {
-                *out_value = ptr + data;
-            }
-            break;
-        default:
-            ALOGE("unrecognized dwarf higher part encoding: 0x%x", encoding);
-            return false;
-    }
-    return true;
-}
-
-/* Having PC find corresponding FDE by reading .eh_frame_hdr section data. */
-static uintptr_t find_fde(const memory_t* memory,
-                          const map_info_t* map_info_list, uintptr_t pc) {
-    if (!pc) {
-        ALOGV("find_fde: pc is zero, no eh_frame");
-        return 0;
-    }
-    const map_info_t* mi = find_map_info(map_info_list, pc);
-    if (!mi) {
-        ALOGV("find_fde: no map info for pc:0x%x", pc);
-        return 0;
-    }
-    const map_info_data_t* midata = mi->data;
-    if (!midata) {
-        ALOGV("find_fde: no eh_frame_hdr for map: start=0x%x, end=0x%x", mi->start, mi->end);
-        return 0;
-    }
-
-    eh_frame_hdr_info_t eh_hdr_info;
-    memset(&eh_hdr_info, 0, sizeof(eh_frame_hdr_info_t));
-
-    /* Getting the first word of eh_frame_hdr:
-        1st byte is version;
-        2nd byte is encoding of pointer to eh_frames;
-        3rd byte is encoding of count of FDEs in lookup table;
-        4th byte is encoding of lookup table entries.
-    */
-    uintptr_t eh_frame_hdr = midata->eh_frame_hdr;
-    uint32_t c = 0;
-    if (!try_get_byte(memory, eh_frame_hdr, &eh_hdr_info.version, &c)) return 0;
-    if (!try_get_byte(memory, eh_frame_hdr, &eh_hdr_info.eh_frame_ptr_enc, &c)) return 0;
-    if (!try_get_byte(memory, eh_frame_hdr, &eh_hdr_info.fde_count_enc, &c)) return 0;
-    if (!try_get_byte(memory, eh_frame_hdr, &eh_hdr_info.fde_table_enc, &c)) return 0;
-
-    /* TODO: 3rd byte can be DW_EH_PE_omit, that means no lookup table available and we should
-       try to parse eh_frame instead. Not sure how often it may occur, skipping now.
-    */
-    if (eh_hdr_info.version != 1) {
-        ALOGV("find_fde: eh_frame_hdr version %d is not supported", eh_hdr_info.version);
-        return 0;
-    }
-    /* Getting the data:
-        2nd word is eh_frame pointer (normally not used, because lookup table has all we need);
-        3rd word is count of FDEs in the lookup table;
-        starting from 4 word there is FDE lookup table (pairs of PC and FDE pointer) sorted by PC;
-    */
-    if (!read_dwarf(memory, eh_frame_hdr, &eh_hdr_info.eh_frame_ptr, eh_hdr_info.eh_frame_ptr_enc, &c)) return 0;
-    if (!read_dwarf(memory, eh_frame_hdr, &eh_hdr_info.fde_count, eh_hdr_info.fde_count_enc, &c)) return 0;
-    ALOGV("find_fde: found %d FDEs", eh_hdr_info.fde_count);
-
-    int32_t low = 0;
-    int32_t high = eh_hdr_info.fde_count;
-    uintptr_t start = 0;
-    uintptr_t fde = 0;
-    /* eh_frame_hdr + c points to lookup table at this point. */
-    while (low <= high) {
-        uint32_t mid = (high + low)/2;
-        uint32_t entry = c + mid * 8;
-        if (!read_dwarf(memory, eh_frame_hdr, &start, eh_hdr_info.fde_table_enc, &entry)) return 0;
-        if (pc <= start) {
-            high = mid - 1;
-        } else {
-            low = mid + 1;
-        }
-    }
-    /* Value found is at high. */
-    if (high < 0) {
-        ALOGV("find_fde: pc %x is out of FDE bounds: %x", pc, start);
-        return 0;
-    }
-    c += high * 8;
-    if (!read_dwarf(memory, eh_frame_hdr, &start, eh_hdr_info.fde_table_enc, &c)) return 0;
-    if (!read_dwarf(memory, eh_frame_hdr, &fde, eh_hdr_info.fde_table_enc, &c)) return 0;
-    ALOGV("pc 0x%x, ENTRY %d: start=0x%x, fde=0x%x", pc, high, start, fde);
-    return fde;
-}
-
-/* Execute single dwarf instruction and update dwarf state accordingly. */
-static bool execute_dwarf(const memory_t* memory, uintptr_t ptr, cie_info_t* cie_info,
-                          dwarf_state_t* dstate, uint32_t* cursor,
-                          dwarf_state_t* stack, uint8_t* stack_ptr) {
-    uint8_t inst;
-    uint8_t op = 0;
-
-    if (!try_get_byte(memory, ptr, &inst, cursor)) {
-        return false;
-    }
-    ALOGV("DW_CFA inst: 0x%x", inst);
-
-    /* For some instructions upper 2 bits is opcode and lower 6 bits is operand. See dwarf-2.0 7.23. */
-    if (inst & 0xc0) {
-        op = inst & 0x3f;
-        inst &= 0xc0;
-    }
-
-    switch ((dwarf_CFA)inst) {
-        uint32_t reg = 0;
-        uint32_t offset = 0;
-        case DW_CFA_advance_loc:
-            dstate->loc += op * cie_info->code_align;
-            ALOGV("DW_CFA_advance_loc: %d to 0x%x", op, dstate->loc);
-            break;
-        case DW_CFA_offset:
-            if (!try_get_uleb128(memory, ptr, &offset, cursor)) return false;
-            dstate->regs[op].rule = 'o';
-            dstate->regs[op].value = offset * cie_info->data_align;
-            ALOGV("DW_CFA_offset: r%d = o(%d)", op, dstate->regs[op].value);
-            break;
-        case DW_CFA_restore:
-            dstate->regs[op].rule = stack->regs[op].rule;
-            dstate->regs[op].value = stack->regs[op].value;
-            ALOGV("DW_CFA_restore: r%d = %c(%d)", op, dstate->regs[op].rule, dstate->regs[op].value);
-            break;
-        case DW_CFA_nop:
-            break;
-        case DW_CFA_set_loc: // probably we don't have it on x86.
-            if (!try_get_xbytes(memory, ptr, &offset, 4, cursor)) return false;
-            if (offset < dstate->loc) {
-                ALOGE("DW_CFA_set_loc: attempt to move location backward");
-                return false;
-            }
-            dstate->loc = offset * cie_info->code_align;
-            ALOGV("DW_CFA_set_loc: %d to 0x%x", offset * cie_info->code_align, dstate->loc);
-            break;
-        case DW_CFA_advance_loc1:
-            if (!try_get_byte(memory, ptr, (uint8_t*)&offset, cursor)) return false;
-            dstate->loc += (uint8_t)offset * cie_info->code_align;
-            ALOGV("DW_CFA_advance_loc1: %d to 0x%x", (uint8_t)offset * cie_info->code_align, dstate->loc);
-            break;
-        case DW_CFA_advance_loc2:
-            if (!try_get_xbytes(memory, ptr, &offset, 2, cursor)) return false;
-            dstate->loc += (uint16_t)offset * cie_info->code_align;
-            ALOGV("DW_CFA_advance_loc2: %d to 0x%x", (uint16_t)offset * cie_info->code_align, dstate->loc);
-            break;
-        case DW_CFA_advance_loc4:
-            if (!try_get_xbytes(memory, ptr, &offset, 4, cursor)) return false;
-            dstate->loc += offset * cie_info->code_align;
-            ALOGV("DW_CFA_advance_loc4: %d to 0x%x", offset * cie_info->code_align, dstate->loc);
-            break;
-        case DW_CFA_offset_extended: // probably we don't have it on x86.
-            if (!try_get_uleb128(memory, ptr, &reg, cursor)) return false;
-            if (!try_get_uleb128(memory, ptr, &offset, cursor)) return false;
-            if (reg >= DWARF_REGISTERS) {
-                ALOGE("DW_CFA_offset_extended: r%d exceeds supported number of registers (%d)", reg, DWARF_REGISTERS);
-                return false;
-            }
-            dstate->regs[reg].rule = 'o';
-            dstate->regs[reg].value = offset * cie_info->data_align;
-            ALOGV("DW_CFA_offset_extended: r%d = o(%d)", reg, dstate->regs[reg].value);
-            break;
-        case DW_CFA_restore_extended: // probably we don't have it on x86.
-            if (!try_get_uleb128(memory, ptr, &reg, cursor)) return false;
-            if (reg >= DWARF_REGISTERS) {
-                ALOGE("DW_CFA_restore_extended: r%d exceeds supported number of registers (%d)", reg, DWARF_REGISTERS);
-                return false;
-            }
-            dstate->regs[reg].rule = stack->regs[reg].rule;
-            dstate->regs[reg].value = stack->regs[reg].value;
-            ALOGV("DW_CFA_restore: r%d = %c(%d)", reg, dstate->regs[reg].rule, dstate->regs[reg].value);
-            break;
-        case DW_CFA_undefined: // probably we don't have it on x86.
-            if (!try_get_uleb128(memory, ptr, &reg, cursor)) return false;
-            if (reg >= DWARF_REGISTERS) {
-                ALOGE("DW_CFA_undefined: r%d exceeds supported number of registers (%d)", reg, DWARF_REGISTERS);
-                return false;
-            }
-            dstate->regs[reg].rule = 'u';
-            dstate->regs[reg].value = 0;
-            ALOGV("DW_CFA_undefined: r%d", reg);
-            break;
-        case DW_CFA_same_value: // probably we don't have it on x86.
-            if (!try_get_uleb128(memory, ptr, &reg, cursor)) return false;
-            if (reg >= DWARF_REGISTERS) {
-                ALOGE("DW_CFA_undefined: r%d exceeds supported number of registers (%d)", reg, DWARF_REGISTERS);
-                return false;
-            }
-            dstate->regs[reg].rule = 's';
-            dstate->regs[reg].value = 0;
-            ALOGV("DW_CFA_same_value: r%d", reg);
-            break;
-        case DW_CFA_register: // probably we don't have it on x86.
-            if (!try_get_uleb128(memory, ptr, &reg, cursor)) return false;
-            /* that's new register actually, not offset */
-            if (!try_get_uleb128(memory, ptr, &offset, cursor)) return false;
-            if (reg >= DWARF_REGISTERS || offset >= DWARF_REGISTERS) {
-                ALOGE("DW_CFA_register: r%d or r%d exceeds supported number of registers (%d)", reg, offset, DWARF_REGISTERS);
-                return false;
-            }
-            dstate->regs[reg].rule = 'r';
-            dstate->regs[reg].value = offset;
-            ALOGV("DW_CFA_register: r%d = r(%d)", reg, dstate->regs[reg].value);
-            break;
-        case DW_CFA_remember_state:
-            if (*stack_ptr == DWARF_STATES_STACK) {
-                ALOGE("DW_CFA_remember_state: states stack overflow %d", *stack_ptr);
-                return false;
-            }
-            stack[(*stack_ptr)++] = *dstate;
-            ALOGV("DW_CFA_remember_state: stacktop moves to %d", *stack_ptr);
-            break;
-        case DW_CFA_restore_state:
-            /* We have CIE state saved at 0 position. It's not supposed to be taken
-               by DW_CFA_restore_state. */
-            if (*stack_ptr == 1) {
-                ALOGE("DW_CFA_restore_state: states stack is empty");
-                return false;
-            }
-            /* Don't touch location on restore. */
-            uintptr_t saveloc = dstate->loc;
-            *dstate = stack[--*stack_ptr];
-            dstate->loc = saveloc;
-            ALOGV("DW_CFA_restore_state: stacktop moves to %d", *stack_ptr);
-            break;
-        case DW_CFA_def_cfa:
-            if (!try_get_uleb128(memory, ptr, &reg, cursor)) return false;
-            if (!try_get_uleb128(memory, ptr, &offset, cursor)) return false;
-            dstate->cfa_reg = reg;
-            dstate->cfa_off = offset;
-            ALOGV("DW_CFA_def_cfa: %x(r%d)", offset, reg);
-            break;
-        case DW_CFA_def_cfa_register:
-            if (!try_get_uleb128(memory, ptr, &reg, cursor)) {
-                return false;
-            }
-            dstate->cfa_reg = reg;
-            ALOGV("DW_CFA_def_cfa_register: r%d", reg);
-            break;
-        case DW_CFA_def_cfa_offset:
-            if (!try_get_uleb128(memory, ptr, &offset, cursor)) {
-                return false;
-            }
-            dstate->cfa_off = offset;
-            ALOGV("DW_CFA_def_cfa_offset: %x", offset);
-            break;
-        default:
-            ALOGE("unrecognized DW_CFA_* instruction: 0x%x", inst);
-            return false;
-    }
-    return true;
-}
-
-/* Restoring particular register value based on dwarf state. */
-static bool get_old_register_value(const memory_t* memory, uint32_t cfa,
-                                   dwarf_state_t* dstate, uint8_t reg,
-                                   unwind_state_t* state, unwind_state_t* newstate) {
-    uint32_t addr;
-    switch (dstate->regs[reg].rule) {
-        case 0:
-            /* We don't have dstate updated for this register, so assuming value kept the same.
-               Normally we should look into state and return current value as the old one
-               but we don't have all registers in state to handle this properly */
-            ALOGV("get_old_register_value: value of r%d is the same", reg);
-            // for ESP if it's not updated by dwarf rule we assume it's equal to CFA
-            if (reg == DWARF_ESP) {
-                ALOGV("get_old_register_value: adjusting esp to CFA: 0x%x", cfa);
-                newstate->reg[reg] = cfa;
-            } else {
-                newstate->reg[reg] = state->reg[reg];
-            }
-            break;
-        case 'o':
-            addr = cfa + (int32_t)dstate->regs[reg].value;
-            if (!try_get_word(memory, addr, &newstate->reg[reg])) {
-                ALOGE("get_old_register_value: can't read from 0x%x", addr);
-                return false;
-            }
-            ALOGV("get_old_register_value: r%d at 0x%x is 0x%x", reg, addr, newstate->reg[reg]);
-            break;
-        case 'r':
-            /* We don't have all registers in state so don't even try to look at 'r' */
-            ALOGE("get_old_register_value: register lookup not implemented yet");
-            break;
-        default:
-            ALOGE("get_old_register_value: unexpected rule:%c value:%d for register %d",
-                   dstate->regs[reg].rule, (int32_t)dstate->regs[reg].value, reg);
-            return false;
-    }
-    return true;
-}
-
-/* Updaing state based on dwarf state. */
-static bool update_state(const memory_t* memory, unwind_state_t* state,
-                         dwarf_state_t* dstate) {
-    unwind_state_t newstate;
-    /* We can restore more registers here if we need them. Meanwile doing minimal work here. */
-    /* Getting CFA. */
-    uintptr_t cfa = 0;
-    if (dstate->cfa_reg == DWARF_ESP) {
-        cfa = state->reg[DWARF_ESP] + dstate->cfa_off;
-    } else if (dstate->cfa_reg == DWARF_EBP) {
-        cfa = state->reg[DWARF_EBP] + dstate->cfa_off;
-    } else {
-        ALOGE("update_state: unexpected CFA register: %d", dstate->cfa_reg);
-        return false;
-    }
-    ALOGV("update_state: new CFA: 0x%x", cfa);
-    /* Getting EIP. */
-    if (!get_old_register_value(memory, cfa, dstate, DWARF_EIP, state, &newstate)) return false;
-    /* Getting EBP. */
-    if (!get_old_register_value(memory, cfa, dstate, DWARF_EBP, state, &newstate)) return false;
-    /* Getting ESP. */
-    if (!get_old_register_value(memory, cfa, dstate, DWARF_ESP, state, &newstate)) return false;
-
-    ALOGV("update_state: IP:  0x%x; restore IP:  0x%x", state->reg[DWARF_EIP], newstate.reg[DWARF_EIP]);
-    ALOGV("update_state: EBP: 0x%x; restore EBP: 0x%x", state->reg[DWARF_EBP], newstate.reg[DWARF_EBP]);
-    ALOGV("update_state: ESP: 0x%x; restore ESP: 0x%x", state->reg[DWARF_ESP], newstate.reg[DWARF_ESP]);
-    *state = newstate;
-    return true;
-}
-
-/* Execute CIE and FDE instructions for FDE found with find_fde. */
-static bool execute_fde(const memory_t* memory,
-                        uintptr_t fde,
-                        unwind_state_t* state) {
-    uint32_t fde_length = 0;
-    uint32_t cie_length = 0;
-    uintptr_t cie = 0;
-    uintptr_t cie_offset = 0;
-    cie_info_t cie_i;
-    cie_info_t* cie_info = &cie_i;
-    fde_info_t fde_i;
-    fde_info_t* fde_info = &fde_i;
-    dwarf_state_t dwarf_state;
-    dwarf_state_t* dstate = &dwarf_state;
-    dwarf_state_t stack[DWARF_STATES_STACK];
-    uint8_t stack_ptr = 0;
-
-    memset(dstate, 0, sizeof(dwarf_state_t));
-    memset(cie_info, 0, sizeof(cie_info_t));
-    memset(fde_info, 0, sizeof(fde_info_t));
-
-    /* Read common CIE or FDE area:
-        1st word is length;
-        2nd word is ID: 0 for CIE, CIE pointer for FDE.
-    */
-    if (!try_get_word(memory, fde, &fde_length)) {
-        return false;
-    }
-    if ((int32_t)fde_length == -1) {
-        ALOGV("execute_fde: 64-bit dwarf detected, not implemented yet");
-        return false;
-    }
-    if (!try_get_word(memory, fde + 4, &cie_offset)) {
-        return false;
-    }
-    if (cie_offset == 0) {
-        /* This is CIE. We shouldn't be here normally. */
-        cie = fde;
-        cie_length = fde_length;
-    } else {
-        /* Find CIE. */
-        /* Positive cie_offset goes backward from current field. */
-        cie = fde + 4 - cie_offset;
-        if (!try_get_word(memory, cie, &cie_length)) {
-           return false;
-        }
-        if ((int32_t)cie_length == -1) {
-           ALOGV("execute_fde: 64-bit dwarf detected, not implemented yet");
-           return false;
-        }
-        if (!try_get_word(memory, cie + 4, &cie_offset)) {
-           return false;
-        }
-        if (cie_offset != 0) {
-           ALOGV("execute_fde: can't find CIE");
-           return false;
-        }
-    }
-    ALOGV("execute_fde: FDE length: %d", fde_length);
-    ALOGV("execute_fde: CIE pointer: %x", cie);
-    ALOGV("execute_fde: CIE length: %d", cie_length);
-
-    /* Read CIE:
-       Augmentation independent:
-        1st byte is version;
-        next x bytes is /0 terminated augmentation string;
-        next x bytes is unsigned LEB128 encoded code alignment factor;
-        next x bytes is signed LEB128 encoded data alignment factor;
-        next 1 (CIE version 1) or x (CIE version 3 unsigned LEB128) bytes is return register column;
-       Augmentation dependent:
-        if 'z' next x bytes is unsigned LEB128 encoded augmentation data size;
-        if 'L' next 1 byte is LSDA encoding;
-        if 'R' next 1 byte is FDE encoding;
-        if 'S' CIE represents signal handler stack frame;
-        if 'P' next 1 byte is personality encoding folowed by personality function pointer;
-       Next x bytes is CIE program.
-    */
-
-    uint32_t c = 8;
-    if (!try_get_byte(memory, cie, &cie_info->version, &c)) {
-       return false;
-    }
-    ALOGV("execute_fde: CIE version: %d", cie_info->version);
-    uint8_t ch;
-    do {
-        if (!try_get_byte(memory, cie, &ch, &c)) {
-           return false;
-        }
-        switch (ch) {
-           case '\0': break;
-           case 'z': cie_info->aug_z = 1; break;
-           case 'L': cie_info->aug_L = 1; break;
-           case 'R': cie_info->aug_R = 1; break;
-           case 'S': cie_info->aug_S = 1; break;
-           case 'P': cie_info->aug_P = 1; break;
-           default:
-              ALOGV("execute_fde: Unrecognized CIE augmentation char: '%c'", ch);
-              return false;
-              break;
-        }
-    } while (ch);
-    if (!try_get_uleb128(memory, cie, &cie_info->code_align, &c)) {
-        return false;
-    }
-    if (!try_get_sleb128(memory, cie, &cie_info->data_align, &c)) {
-        return false;
-    }
-    if (cie_info->version >= 3) {
-        if (!try_get_uleb128(memory, cie, &cie_info->reg, &c)) {
-            return false;
-        }
-    } else {
-        if (!try_get_byte(memory, cie, (uint8_t*)&cie_info->reg, &c)) {
-            return false;
-        }
-    }
-    ALOGV("execute_fde: CIE code alignment factor: %d", cie_info->code_align);
-    ALOGV("execute_fde: CIE data alignment factor: %d", cie_info->data_align);
-    if (cie_info->aug_z) {
-        if (!try_get_uleb128(memory, cie, &cie_info->aug_z, &c)) {
-            return false;
-        }
-    }
-    if (cie_info->aug_L) {
-        if (!try_get_byte(memory, cie, &cie_info->aug_L, &c)) {
-            return false;
-        }
-    } else {
-        /* Default encoding. */
-        cie_info->aug_L = DW_EH_PE_absptr;
-    }
-    if (cie_info->aug_R) {
-        if (!try_get_byte(memory, cie, &cie_info->aug_R, &c)) {
-            return false;
-        }
-    } else {
-        /* Default encoding. */
-        cie_info->aug_R = DW_EH_PE_absptr;
-    }
-    if (cie_info->aug_P) {
-        /* Get encoding of personality routine pointer. We don't use it now. */
-        if (!try_get_byte(memory, cie, (uint8_t*)&cie_info->aug_P, &c)) {
-            return false;
-        }
-        /* Get routine pointer. */
-        if (!read_dwarf(memory, cie, &cie_info->aug_P, (uint8_t)cie_info->aug_P, &c)) {
-            return false;
-        }
-    }
-    /* CIE program. */
-    /* Length field itself (4 bytes) is not included into length. */
-    stack[0] = *dstate;
-    stack_ptr = 1;
-    while (c < cie_length + 4) {
-        if (!execute_dwarf(memory, cie, cie_info, dstate, &c, stack, &stack_ptr)) {
-           return false;
-        }
-    }
-
-    /* We went directly to CIE. Normally it shouldn't occur. */
-    if (cie == fde) return true;
-
-    /* Go back to FDE. */
-    c = 8;
-    /* Read FDE:
-       Augmentation independent:
-        next x bytes (encoded as specified in CIE) is FDE starting address;
-        next x bytes (encoded as specified in CIE) is FDE number of instructions covered;
-       Augmentation dependent:
-        if 'z' next x bytes is unsigned LEB128 encoded augmentation data size;
-        if 'L' next x bytes is LSDA pointer (encoded as specified in CIE);
-       Next x bytes is FDE program.
-     */
-    if (!read_dwarf(memory, fde, &fde_info->start, (uint8_t)cie_info->aug_R, &c)) {
-        return false;
-    }
-    dstate->loc = fde_info->start;
-    ALOGV("execute_fde: FDE start: %x", dstate->loc);
-    if (!read_dwarf(memory, fde, &fde_info->length, 0, &c)) {
-        return false;
-    }
-    ALOGV("execute_fde: FDE length: %x", fde_info->length);
-    if (cie_info->aug_z) {
-        if (!try_get_uleb128(memory, fde, &fde_info->aug_z, &c)) {
-            return false;
-        }
-    }
-    if (cie_info->aug_L && cie_info->aug_L != DW_EH_PE_omit) {
-        if (!read_dwarf(memory, fde, &fde_info->aug_L, cie_info->aug_L, &c)) {
-            return false;
-        }
-    }
-    /* FDE program. */
-    /* Length field itself (4 bytes) is not included into length. */
-    /* Save CIE state as 0 element of stack. Used by DW_CFA_restore. */
-    stack[0] = *dstate;
-    stack_ptr = 1;
-    while (c < fde_length + 4 && state->reg[DWARF_EIP] >= dstate->loc) {
-        if (!execute_dwarf(memory, fde, cie_info, dstate, &c, stack, &stack_ptr)) {
-           return false;
-        }
-        ALOGV("IP: %x, LOC: %x", state->reg[DWARF_EIP], dstate->loc);
-    }
-
-    return update_state(memory, state, dstate);
-}
-
-static ssize_t unwind_backtrace_common(const memory_t* memory,
-        const map_info_t* map_info_list,
-        unwind_state_t* state, backtrace_frame_t* backtrace,
-        size_t ignore_depth, size_t max_depth) {
-
-    size_t ignored_frames = 0;
-    size_t returned_frames = 0;
-
-    ALOGV("Unwinding tid: %d", memory->tid);
-    ALOGV("IP: %x", state->reg[DWARF_EIP]);
-    ALOGV("BP: %x", state->reg[DWARF_EBP]);
-    ALOGV("SP: %x", state->reg[DWARF_ESP]);
-
-    for (size_t index = 0; returned_frames < max_depth; index++) {
-        uintptr_t fde = find_fde(memory, map_info_list, state->reg[DWARF_EIP]);
-        /* FDE is not found, it may happen if stack is corrupted or calling wrong adress.
-           Getting return address from stack.
-        */
-        if (!fde) {
-            uint32_t ip;
-            ALOGV("trying to restore registers from stack");
-            if (!try_get_word(memory, state->reg[DWARF_EBP] + 4, &ip) ||
-                ip == state->reg[DWARF_EIP]) {
-                ALOGV("can't get IP from stack");
-                break;
-            }
-            /* We've been able to get IP from stack so recording the frame before continue. */
-            backtrace_frame_t* frame = add_backtrace_entry(
-                    index ? rewind_pc_arch(memory, state->reg[DWARF_EIP]) : state->reg[DWARF_EIP],
-                    backtrace, ignore_depth, max_depth,
-                    &ignored_frames, &returned_frames);
-            state->reg[DWARF_EIP] = ip;
-            state->reg[DWARF_ESP] = state->reg[DWARF_EBP] + 8;
-            if (!try_get_word(memory, state->reg[DWARF_EBP], &state->reg[DWARF_EBP])) {
-                ALOGV("can't get EBP from stack");
-                break;
-            }
-            ALOGV("restore IP: %x", state->reg[DWARF_EIP]);
-            ALOGV("restore BP: %x", state->reg[DWARF_EBP]);
-            ALOGV("restore SP: %x", state->reg[DWARF_ESP]);
-            continue;
-        }
-        backtrace_frame_t* frame = add_backtrace_entry(
-                index ? rewind_pc_arch(memory, state->reg[DWARF_EIP]) : state->reg[DWARF_EIP],
-                backtrace, ignore_depth, max_depth,
-                &ignored_frames, &returned_frames);
-
-        uint32_t stack_top = state->reg[DWARF_ESP];
-
-        if (!execute_fde(memory, fde, state)) break;
-
-        if (frame) {
-            frame->stack_top = stack_top;
-            if (stack_top < state->reg[DWARF_ESP]) {
-                frame->stack_size = state->reg[DWARF_ESP] - stack_top;
-            }
-        }
-        ALOGV("Stack: 0x%x ... 0x%x - %d bytes", frame->stack_top, state->reg[DWARF_ESP], frame->stack_size);
-    }
-    return returned_frames;
-}
-
-ssize_t unwind_backtrace_signal_arch(siginfo_t* siginfo __attribute__((unused)), void* sigcontext,
-        const map_info_t* map_info_list,
-        backtrace_frame_t* backtrace, size_t ignore_depth, size_t max_depth) {
-    const ucontext_t* uc = (const ucontext_t*)sigcontext;
-
-    unwind_state_t state;
-#if defined(__APPLE__)
-    state.reg[DWARF_EBP] = uc->uc_mcontext->__ss.__ebp;
-    state.reg[DWARF_ESP] = uc->uc_mcontext->__ss.__esp;
-    state.reg[DWARF_EIP] = uc->uc_mcontext->__ss.__eip;
-#else
-    state.reg[DWARF_EBP] = uc->uc_mcontext.gregs[REG_EBP];
-    state.reg[DWARF_ESP] = uc->uc_mcontext.gregs[REG_ESP];
-    state.reg[DWARF_EIP] = uc->uc_mcontext.gregs[REG_EIP];
-#endif
-
-    memory_t memory;
-    init_memory(&memory, map_info_list);
-    return unwind_backtrace_common(&memory, map_info_list,
-            &state, backtrace, ignore_depth, max_depth);
-}
-
-ssize_t unwind_backtrace_ptrace_arch(pid_t tid, const ptrace_context_t* context,
-        backtrace_frame_t* backtrace, size_t ignore_depth, size_t max_depth) {
-#if defined(__APPLE__)
-    return -1;
-#else
-    pt_regs_x86_t regs;
-    if (ptrace(PTRACE_GETREGS, tid, 0, &regs)) {
-        return -1;
-    }
-
-    unwind_state_t state;
-    state.reg[DWARF_EBP] = regs.ebp;
-    state.reg[DWARF_EIP] = regs.eip;
-    state.reg[DWARF_ESP] = regs.esp;
-
-    memory_t memory;
-    init_memory_ptrace(&memory, tid);
-    return unwind_backtrace_common(&memory, context->map_info_list,
-            &state, backtrace, ignore_depth, max_depth);
-#endif
-}
diff --git a/libcorkscrew/arch-x86/dwarf.h b/libcorkscrew/arch-x86/dwarf.h
deleted file mode 100755
index 962fc55..0000000
--- a/libcorkscrew/arch-x86/dwarf.h
+++ /dev/null
@@ -1,140 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/*
- * Dwarf2 data encoding flags.
- */
-
-#define DW_EH_PE_absptr         0x00
-#define DW_EH_PE_omit           0xff
-#define DW_EH_PE_uleb128        0x01
-#define DW_EH_PE_udata2         0x02
-#define DW_EH_PE_udata4         0x03
-#define DW_EH_PE_udata8         0x04
-#define DW_EH_PE_sleb128        0x09
-#define DW_EH_PE_sdata2         0x0A
-#define DW_EH_PE_sdata4         0x0B
-#define DW_EH_PE_sdata8         0x0C
-#define DW_EH_PE_signed         0x08
-#define DW_EH_PE_pcrel          0x10
-#define DW_EH_PE_textrel        0x20
-#define DW_EH_PE_datarel        0x30
-#define DW_EH_PE_funcrel        0x40
-#define DW_EH_PE_aligned        0x50
-#define DW_EH_PE_indirect       0x80
-
-/*
- * Dwarf2 call frame instructions.
- */
-
-typedef enum {
-    DW_CFA_advance_loc = 0x40,
-    DW_CFA_offset = 0x80,
-    DW_CFA_restore = 0xc0,
-    DW_CFA_nop = 0x00,
-    DW_CFA_set_loc = 0x01,
-    DW_CFA_advance_loc1 = 0x02,
-    DW_CFA_advance_loc2 = 0x03,
-    DW_CFA_advance_loc4 = 0x04,
-    DW_CFA_offset_extended = 0x05,
-    DW_CFA_restore_extended = 0x06,
-    DW_CFA_undefined = 0x07,
-    DW_CFA_same_value = 0x08,
-    DW_CFA_register = 0x09,
-    DW_CFA_remember_state = 0x0a,
-    DW_CFA_restore_state = 0x0b,
-    DW_CFA_def_cfa = 0x0c,
-    DW_CFA_def_cfa_register = 0x0d,
-    DW_CFA_def_cfa_offset = 0x0e
-} dwarf_CFA;
-
-/*
- * eh_frame_hdr information.
-*/
-
-typedef struct {
-      uint8_t version;
-      uint8_t eh_frame_ptr_enc;
-      uint8_t fde_count_enc;
-      uint8_t fde_table_enc;
-      uintptr_t eh_frame_ptr;
-      uint32_t fde_count;
-} eh_frame_hdr_info_t;
-
-/*
- * CIE information.
-*/
-
-typedef struct {
-      uint8_t version;
-      uint32_t code_align;
-      uint32_t data_align;
-      uint32_t reg;
-      uint32_t aug_z;
-      uint8_t aug_L;
-      uint8_t aug_R;
-      uint8_t aug_S;
-      uint32_t aug_P;
-} cie_info_t;
-
-/*
- * FDE information.
-*/
-
-typedef struct {
-      uint32_t start;
-      uint32_t length; // number of instructions covered by FDE
-      uint32_t aug_z;
-      uint32_t aug_L;
-} fde_info_t;
-
-/*
- * Dwarf state.
-*/
-
-/* Stack of states: required for DW_CFA_remember_state/DW_CFA_restore_state
-   30 should be enough */
-#define DWARF_STATES_STACK 30
-
-typedef struct {
-    char rule;         // rule: o - offset(value); r - register(value)
-    uint32_t value;    // value
-} reg_rule_t;
-
-/* Dwarf preserved number of registers for x86. */
-
-#define DWARF_REGISTERS 17
-
-typedef struct {
-    uintptr_t loc;     // location (ip)
-    uint8_t cfa_reg;   // index of register where CFA location stored
-    intptr_t cfa_off;  // offset
-    reg_rule_t regs[DWARF_REGISTERS]; // dwarf preserved registers for x86
-} dwarf_state_t;
-
-/* DWARF registers we are caring about. */
-
-#define DWARF_EAX     0
-#define DWARF_ECX     1
-#define DWARF_EDX     2
-#define DWARF_EBX     3
-#define DWARF_ESP     4
-#define DWARF_EBP     5
-#define DWARF_ESI     6
-#define DWARF_EDI     7
-#define DWARF_EIP     8
-
-
diff --git a/libcorkscrew/arch-x86/ptrace-x86.c b/libcorkscrew/arch-x86/ptrace-x86.c
deleted file mode 100755
index 9c49b93..0000000
--- a/libcorkscrew/arch-x86/ptrace-x86.c
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "Corkscrew"
-//#define LOG_NDEBUG 0
-
-#include "../ptrace-arch.h"
-
-#include <stddef.h>
-#include <elf.h>
-#include <cutils/log.h>
-
-static void load_eh_frame_hdr(pid_t pid, map_info_t* mi, uintptr_t *eh_frame_hdr) {
-    uint32_t elf_phoff;
-    uint32_t elf_phentsize_ehsize;
-    uint32_t elf_shentsize_phnum;
-    if (try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_phoff), &elf_phoff)
-            && try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_ehsize),
-                    &elf_phentsize_ehsize)
-            && try_get_word_ptrace(pid, mi->start + offsetof(Elf32_Ehdr, e_phnum),
-                    &elf_shentsize_phnum)) {
-        uint32_t elf_phentsize = elf_phentsize_ehsize >> 16;
-        uint32_t elf_phnum = elf_shentsize_phnum & 0xffff;
-        for (uint32_t i = 0; i < elf_phnum; i++) {
-            uintptr_t elf_phdr = mi->start + elf_phoff + i * elf_phentsize;
-            uint32_t elf_phdr_type;
-            if (!try_get_word_ptrace(pid, elf_phdr + offsetof(Elf32_Phdr, p_type), &elf_phdr_type)) {
-                break;
-            }
-            if (elf_phdr_type == PT_GNU_EH_FRAME) {
-                uint32_t elf_phdr_offset;
-                if (!try_get_word_ptrace(pid, elf_phdr + offsetof(Elf32_Phdr, p_offset),
-                        &elf_phdr_offset)) {
-                    break;
-                }
-                *eh_frame_hdr = mi->start + elf_phdr_offset;
-                ALOGV("Parsed .eh_frame_hdr info for %s: start=0x%08x", mi->name, *eh_frame_hdr);
-                return;
-            }
-        }
-    }
-    *eh_frame_hdr = 0;
-}
-
-void load_ptrace_map_info_data_arch(pid_t pid, map_info_t* mi, map_info_data_t* data) {
-    load_eh_frame_hdr(pid, mi, &data->eh_frame_hdr);
-}
-
-void free_ptrace_map_info_data_arch(map_info_t* mi __attribute__((unused)),
-                                    map_info_data_t* data __attribute__((unused))) {
-}
diff --git a/libcorkscrew/backtrace-arch.h b/libcorkscrew/backtrace-arch.h
deleted file mode 100644
index a46f80b..0000000
--- a/libcorkscrew/backtrace-arch.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/* Architecture dependent functions. */
-
-#ifndef _CORKSCREW_BACKTRACE_ARCH_H
-#define _CORKSCREW_BACKTRACE_ARCH_H
-
-#include "ptrace-arch.h"
-#include <corkscrew/backtrace.h>
-
-#include <signal.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* Rewind the program counter by one instruction. */
-uintptr_t rewind_pc_arch(const memory_t* memory, uintptr_t pc);
-
-ssize_t unwind_backtrace_signal_arch(siginfo_t* siginfo, void* sigcontext,
-        const map_info_t* map_info_list,
-        backtrace_frame_t* backtrace, size_t ignore_depth, size_t max_depth);
-
-ssize_t unwind_backtrace_ptrace_arch(pid_t tid, const ptrace_context_t* context,
-        backtrace_frame_t* backtrace, size_t ignore_depth, size_t max_depth);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif // _CORKSCREW_BACKTRACE_ARCH_H
diff --git a/libcorkscrew/backtrace-helper.c b/libcorkscrew/backtrace-helper.c
deleted file mode 100644
index bf9d3f3..0000000
--- a/libcorkscrew/backtrace-helper.c
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "Corkscrew"
-//#define LOG_NDEBUG 0
-
-#include "backtrace-helper.h"
-
-#include <cutils/log.h>
-
-backtrace_frame_t* add_backtrace_entry(uintptr_t pc, backtrace_frame_t* backtrace,
-        size_t ignore_depth, size_t max_depth,
-        size_t* ignored_frames, size_t* returned_frames) {
-    if (*ignored_frames < ignore_depth) {
-        *ignored_frames += 1;
-        return NULL;
-    }
-    if (*returned_frames >= max_depth) {
-        return NULL;
-    }
-    backtrace_frame_t* frame = &backtrace[*returned_frames];
-    frame->absolute_pc = pc;
-    frame->stack_top = 0;
-    frame->stack_size = 0;
-    *returned_frames += 1;
-    return frame;
-}
diff --git a/libcorkscrew/backtrace-helper.h b/libcorkscrew/backtrace-helper.h
deleted file mode 100644
index 4d8a874..0000000
--- a/libcorkscrew/backtrace-helper.h
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/* Backtrace helper functions. */
-
-#ifndef _CORKSCREW_BACKTRACE_HELPER_H
-#define _CORKSCREW_BACKTRACE_HELPER_H
-
-#include <corkscrew/backtrace.h>
-#include <sys/types.h>
-#include <stdbool.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/*
- * Add a program counter to a backtrace if it will fit.
- * Returns the newly added frame, or NULL if none.
- */
-backtrace_frame_t* add_backtrace_entry(uintptr_t pc,
-        backtrace_frame_t* backtrace,
-        size_t ignore_depth, size_t max_depth,
-        size_t* ignored_frames, size_t* returned_frames);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif // _CORKSCREW_BACKTRACE_HELPER_H
diff --git a/libcorkscrew/backtrace.c b/libcorkscrew/backtrace.c
deleted file mode 100644
index f1dd61d..0000000
--- a/libcorkscrew/backtrace.c
+++ /dev/null
@@ -1,335 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "Corkscrew"
-//#define LOG_NDEBUG 0
-
-#include "backtrace-arch.h"
-#include "backtrace-helper.h"
-#include "ptrace-arch.h"
-#include <corkscrew/map_info.h>
-#include <corkscrew/symbol_table.h>
-#include <corkscrew/ptrace.h>
-#include <corkscrew/demangle.h>
-
-#include <unistd.h>
-#include <signal.h>
-#include <stdlib.h>
-#include <string.h>
-#include <pthread.h>
-#include <unwind.h>
-#include <cutils/log.h>
-#include <cutils/atomic.h>
-
-#define __USE_GNU // For dladdr(3) in glibc.
-#include <dlfcn.h>
-
-#if defined(__BIONIC__)
-
-// Bionic implements and exports gettid but only implements tgkill.
-extern int tgkill(int tgid, int tid, int sig);
-
-#elif defined(__APPLE__)
-
-#include <sys/syscall.h>
-
-// Mac OS >= 10.6 has a system call equivalent to Linux's gettid().
-static pid_t gettid() {
-  return syscall(SYS_thread_selfid);
-}
-
-#else
-
-// glibc doesn't implement or export either gettid or tgkill.
-
-#include <unistd.h>
-#include <sys/syscall.h>
-
-static pid_t gettid() {
-  return syscall(__NR_gettid);
-}
-
-static int tgkill(int tgid, int tid, int sig) {
-  return syscall(__NR_tgkill, tgid, tid, sig);
-}
-
-#endif
-
-typedef struct {
-    backtrace_frame_t* backtrace;
-    size_t ignore_depth;
-    size_t max_depth;
-    size_t ignored_frames;
-    size_t returned_frames;
-    memory_t memory;
-} backtrace_state_t;
-
-static _Unwind_Reason_Code unwind_backtrace_callback(struct _Unwind_Context* context, void* arg) {
-    backtrace_state_t* state = (backtrace_state_t*)arg;
-    uintptr_t pc = _Unwind_GetIP(context);
-    if (pc) {
-        // TODO: Get information about the stack layout from the _Unwind_Context.
-        //       This will require a new architecture-specific function to query
-        //       the appropriate registers.  Current callers of unwind_backtrace
-        //       don't need this information, so we won't bother collecting it just yet.
-        add_backtrace_entry(rewind_pc_arch(&state->memory, pc), state->backtrace,
-                state->ignore_depth, state->max_depth,
-                &state->ignored_frames, &state->returned_frames);
-    }
-    return state->returned_frames < state->max_depth ? _URC_NO_REASON : _URC_END_OF_STACK;
-}
-
-ssize_t unwind_backtrace(backtrace_frame_t* backtrace, size_t ignore_depth, size_t max_depth) {
-    ALOGV("Unwinding current thread %d.", gettid());
-
-    map_info_t* milist = acquire_my_map_info_list();
-
-    backtrace_state_t state;
-    state.backtrace = backtrace;
-    state.ignore_depth = ignore_depth;
-    state.max_depth = max_depth;
-    state.ignored_frames = 0;
-    state.returned_frames = 0;
-    init_memory(&state.memory, milist);
-
-    _Unwind_Reason_Code rc = _Unwind_Backtrace(unwind_backtrace_callback, &state);
-
-    release_my_map_info_list(milist);
-
-    if (state.returned_frames) {
-        return state.returned_frames;
-    }
-    return rc == _URC_END_OF_STACK ? 0 : -1;
-}
-
-#ifdef CORKSCREW_HAVE_ARCH
-static const int32_t STATE_DUMPING = -1;
-static const int32_t STATE_DONE = -2;
-static const int32_t STATE_CANCEL = -3;
-
-static pthread_mutex_t g_unwind_signal_mutex = PTHREAD_MUTEX_INITIALIZER;
-static volatile struct {
-    int32_t tid_state;
-    const map_info_t* map_info_list;
-    backtrace_frame_t* backtrace;
-    size_t ignore_depth;
-    size_t max_depth;
-    size_t returned_frames;
-} g_unwind_signal_state;
-
-static void unwind_backtrace_thread_signal_handler(int n __attribute__((unused)), siginfo_t* siginfo, void* sigcontext) {
-    if (!android_atomic_acquire_cas(gettid(), STATE_DUMPING, &g_unwind_signal_state.tid_state)) {
-        g_unwind_signal_state.returned_frames = unwind_backtrace_signal_arch(
-                siginfo, sigcontext,
-                g_unwind_signal_state.map_info_list,
-                g_unwind_signal_state.backtrace,
-                g_unwind_signal_state.ignore_depth,
-                g_unwind_signal_state.max_depth);
-        android_atomic_release_store(STATE_DONE, &g_unwind_signal_state.tid_state);
-    } else {
-        ALOGV("Received spurious SIGURG on thread %d that was intended for thread %d.",
-                gettid(), android_atomic_acquire_load(&g_unwind_signal_state.tid_state));
-    }
-}
-#endif
-
-ssize_t unwind_backtrace_thread(pid_t tid, backtrace_frame_t* backtrace,
-        size_t ignore_depth, size_t max_depth) {
-    if (tid == gettid()) {
-        return unwind_backtrace(backtrace, ignore_depth + 1, max_depth);
-    }
-
-    ALOGV("Unwinding thread %d from thread %d.", tid, gettid());
-
-    // TODO: there's no tgkill(2) on Mac OS, so we'd either need the
-    // mach_port_t or the pthread_t rather than the tid.
-#if defined(CORKSCREW_HAVE_ARCH) && !defined(__APPLE__)
-    struct sigaction act;
-    struct sigaction oact;
-    memset(&act, 0, sizeof(act));
-    act.sa_sigaction = unwind_backtrace_thread_signal_handler;
-    act.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
-    sigemptyset(&act.sa_mask);
-
-    pthread_mutex_lock(&g_unwind_signal_mutex);
-    map_info_t* milist = acquire_my_map_info_list();
-
-    ssize_t frames = -1;
-    if (!sigaction(SIGURG, &act, &oact)) {
-        g_unwind_signal_state.map_info_list = milist;
-        g_unwind_signal_state.backtrace = backtrace;
-        g_unwind_signal_state.ignore_depth = ignore_depth;
-        g_unwind_signal_state.max_depth = max_depth;
-        g_unwind_signal_state.returned_frames = 0;
-        android_atomic_release_store(tid, &g_unwind_signal_state.tid_state);
-
-        // Signal the specific thread that we want to dump.
-        int32_t tid_state = tid;
-        if (tgkill(getpid(), tid, SIGURG)) {
-            ALOGV("Failed to send SIGURG to thread %d.", tid);
-        } else {
-            // Wait for the other thread to start dumping the stack, or time out.
-            int wait_millis = 250;
-            for (;;) {
-                tid_state = android_atomic_acquire_load(&g_unwind_signal_state.tid_state);
-                if (tid_state != tid) {
-                    break;
-                }
-                if (wait_millis--) {
-                    ALOGV("Waiting for thread %d to start dumping the stack...", tid);
-                    usleep(1000);
-                } else {
-                    ALOGV("Timed out waiting for thread %d to start dumping the stack.", tid);
-                    break;
-                }
-            }
-        }
-
-        // Try to cancel the dump if it has not started yet.
-        if (tid_state == tid) {
-            if (!android_atomic_acquire_cas(tid, STATE_CANCEL, &g_unwind_signal_state.tid_state)) {
-                ALOGV("Canceled thread %d stack dump.", tid);
-                tid_state = STATE_CANCEL;
-            } else {
-                tid_state = android_atomic_acquire_load(&g_unwind_signal_state.tid_state);
-            }
-        }
-
-        // Wait indefinitely for the dump to finish or be canceled.
-        // We cannot apply a timeout here because the other thread is accessing state that
-        // is owned by this thread, such as milist.  It should not take very
-        // long to take the dump once started.
-        while (tid_state == STATE_DUMPING) {
-            ALOGV("Waiting for thread %d to finish dumping the stack...", tid);
-            usleep(1000);
-            tid_state = android_atomic_acquire_load(&g_unwind_signal_state.tid_state);
-        }
-
-        if (tid_state == STATE_DONE) {
-            frames = g_unwind_signal_state.returned_frames;
-        }
-
-        sigaction(SIGURG, &oact, NULL);
-    }
-
-    release_my_map_info_list(milist);
-    pthread_mutex_unlock(&g_unwind_signal_mutex);
-    return frames;
-#else
-    return -1;
-#endif
-}
-
-ssize_t unwind_backtrace_ptrace(pid_t tid, const ptrace_context_t* context,
-        backtrace_frame_t* backtrace, size_t ignore_depth, size_t max_depth) {
-#ifdef CORKSCREW_HAVE_ARCH
-    return unwind_backtrace_ptrace_arch(tid, context, backtrace, ignore_depth, max_depth);
-#else
-    return -1;
-#endif
-}
-
-static void init_backtrace_symbol(backtrace_symbol_t* symbol, uintptr_t pc) {
-    symbol->relative_pc = pc;
-    symbol->relative_symbol_addr = 0;
-    symbol->map_name = NULL;
-    symbol->symbol_name = NULL;
-    symbol->demangled_name = NULL;
-}
-
-void get_backtrace_symbols(const backtrace_frame_t* backtrace, size_t frames,
-        backtrace_symbol_t* backtrace_symbols) {
-    map_info_t* milist = acquire_my_map_info_list();
-    for (size_t i = 0; i < frames; i++) {
-        const backtrace_frame_t* frame = &backtrace[i];
-        backtrace_symbol_t* symbol = &backtrace_symbols[i];
-        init_backtrace_symbol(symbol, frame->absolute_pc);
-
-        const map_info_t* mi = find_map_info(milist, frame->absolute_pc);
-        if (mi) {
-            symbol->relative_pc = frame->absolute_pc - mi->start;
-            if (mi->name[0]) {
-                symbol->map_name = strdup(mi->name);
-            }
-            Dl_info info;
-            if (dladdr((const void*)frame->absolute_pc, &info) && info.dli_sname) {
-                symbol->relative_symbol_addr = (uintptr_t)info.dli_saddr
-                        - (uintptr_t)info.dli_fbase;
-                symbol->symbol_name = strdup(info.dli_sname);
-                symbol->demangled_name = demangle_symbol_name(symbol->symbol_name);
-            }
-        }
-    }
-    release_my_map_info_list(milist);
-}
-
-void get_backtrace_symbols_ptrace(const ptrace_context_t* context,
-        const backtrace_frame_t* backtrace, size_t frames,
-        backtrace_symbol_t* backtrace_symbols) {
-    for (size_t i = 0; i < frames; i++) {
-        const backtrace_frame_t* frame = &backtrace[i];
-        backtrace_symbol_t* symbol = &backtrace_symbols[i];
-        init_backtrace_symbol(symbol, frame->absolute_pc);
-
-        const map_info_t* mi;
-        const symbol_t* s;
-        find_symbol_ptrace(context, frame->absolute_pc, &mi, &s);
-        if (mi) {
-            symbol->relative_pc = frame->absolute_pc - mi->start;
-            if (mi->name[0]) {
-                symbol->map_name = strdup(mi->name);
-            }
-        }
-        if (s) {
-            symbol->relative_symbol_addr = s->start;
-            symbol->symbol_name = strdup(s->name);
-            symbol->demangled_name = demangle_symbol_name(symbol->symbol_name);
-        }
-    }
-}
-
-void free_backtrace_symbols(backtrace_symbol_t* backtrace_symbols, size_t frames) {
-    for (size_t i = 0; i < frames; i++) {
-        backtrace_symbol_t* symbol = &backtrace_symbols[i];
-        free(symbol->map_name);
-        free(symbol->symbol_name);
-        free(symbol->demangled_name);
-        init_backtrace_symbol(symbol, 0);
-    }
-}
-
-void format_backtrace_line(unsigned frameNumber, const backtrace_frame_t* frame __attribute__((unused)),
-        const backtrace_symbol_t* symbol, char* buffer, size_t bufferSize) {
-    const char* mapName = symbol->map_name ? symbol->map_name : "<unknown>";
-    const char* symbolName = symbol->demangled_name ? symbol->demangled_name : symbol->symbol_name;
-    int fieldWidth = (bufferSize - 80) / 2;
-    if (symbolName) {
-        uint32_t pc_offset = symbol->relative_pc - symbol->relative_symbol_addr;
-        if (pc_offset) {
-            snprintf(buffer, bufferSize, "#%02u  pc %08x  %.*s (%.*s+%u)",
-                    frameNumber, (unsigned int) symbol->relative_pc,
-                    fieldWidth, mapName, fieldWidth, symbolName, pc_offset);
-        } else {
-            snprintf(buffer, bufferSize, "#%02u  pc %08x  %.*s (%.*s)",
-                    frameNumber, (unsigned int) symbol->relative_pc,
-                    fieldWidth, mapName, fieldWidth, symbolName);
-        }
-    } else {
-        snprintf(buffer, bufferSize, "#%02u  pc %08x  %.*s",
-                frameNumber, (unsigned int) symbol->relative_pc,
-                fieldWidth, mapName);
-    }
-}
diff --git a/libcorkscrew/demangle.c b/libcorkscrew/demangle.c
deleted file mode 100644
index 30ab1b0..0000000
--- a/libcorkscrew/demangle.c
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "Corkscrew"
-//#define LOG_NDEBUG 0
-
-#include <corkscrew/demangle.h>
-
-#include <cutils/log.h>
-
-extern char *__cxa_demangle (const char *mangled, char *buf, size_t *len,
-                             int *status);
-
-char* demangle_symbol_name(const char* name) {
-#if defined(__APPLE__)
-    // Mac OS' __cxa_demangle demangles "f" as "float"; last tested on 10.7.
-    if (name != NULL && name[0] != '_') {
-        return NULL;
-    }
-#endif
-    // __cxa_demangle handles NULL by returning NULL
-    return __cxa_demangle(name, 0, 0, 0);
-}
diff --git a/libcorkscrew/map_info.c b/libcorkscrew/map_info.c
deleted file mode 100644
index 93dffbf..0000000
--- a/libcorkscrew/map_info.c
+++ /dev/null
@@ -1,279 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "Corkscrew"
-//#define LOG_NDEBUG 0
-
-#include <corkscrew/map_info.h>
-
-#include <ctype.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <limits.h>
-#include <pthread.h>
-#include <unistd.h>
-#include <cutils/log.h>
-#include <sys/time.h>
-
-#if defined(__APPLE__)
-
-// Mac OS vmmap(1) output:
-// __TEXT                 0009f000-000a1000 [    8K     8K] r-x/rwx SM=COW  /Volumes/android/dalvik-dev/out/host/darwin-x86/bin/libcorkscrew_test\n
-// 012345678901234567890123456789012345678901234567890123456789
-// 0         1         2         3         4         5
-static map_info_t* parse_vmmap_line(const char* line) {
-    unsigned long int start;
-    unsigned long int end;
-    char permissions[4];
-    int name_pos;
-    if (sscanf(line, "%*21c %lx-%lx [%*13c] %3c/%*3c SM=%*3c  %n",
-               &start, &end, permissions, &name_pos) != 3) {
-        return NULL;
-    }
-
-    const char* name = line + name_pos;
-    size_t name_len = strlen(name);
-
-    map_info_t* mi = calloc(1, sizeof(map_info_t) + name_len);
-    if (mi != NULL) {
-        mi->start = start;
-        mi->end = end;
-        mi->is_readable = permissions[0] == 'r';
-        mi->is_writable = permissions[1] == 'w';
-        mi->is_executable = permissions[2] == 'x';
-        mi->data = NULL;
-        memcpy(mi->name, name, name_len);
-        mi->name[name_len - 1] = '\0';
-        ALOGV("Parsed map: start=0x%08x, end=0x%08x, "
-              "is_readable=%d, is_writable=%d is_executable=%d, name=%s",
-              mi->start, mi->end,
-              mi->is_readable, mi->is_writable, mi->is_executable, mi->name);
-    }
-    return mi;
-}
-
-map_info_t* load_map_info_list(pid_t pid) {
-    char cmd[1024];
-    snprintf(cmd, sizeof(cmd), "vmmap -w -resident -submap -allSplitLibs -interleaved %d", pid);
-    FILE* fp = popen(cmd, "r");
-    if (fp == NULL) {
-        return NULL;
-    }
-
-    char line[1024];
-    map_info_t* milist = NULL;
-    while (fgets(line, sizeof(line), fp) != NULL) {
-        map_info_t* mi = parse_vmmap_line(line);
-        if (mi != NULL) {
-            mi->next = milist;
-            milist = mi;
-        }
-    }
-    pclose(fp);
-    return milist;
-}
-
-#else
-
-// Linux /proc/<pid>/maps lines:
-// 6f000000-6f01e000 rwxp 00000000 00:0c 16389419   /system/lib/libcomposer.so\n
-// 012345678901234567890123456789012345678901234567890123456789
-// 0         1         2         3         4         5
-static map_info_t* parse_maps_line(const char* line)
-{
-    unsigned long int start;
-    unsigned long int end;
-    char permissions[5];
-    int name_pos;
-    if (sscanf(line, "%lx-%lx %4s %*x %*x:%*x %*d%n", &start, &end,
-            permissions, &name_pos) != 3) {
-        return NULL;
-    }
-
-    while (isspace(line[name_pos])) {
-        name_pos += 1;
-    }
-    const char* name = line + name_pos;
-    size_t name_len = strlen(name);
-    if (name_len && name[name_len - 1] == '\n') {
-        name_len -= 1;
-    }
-
-    map_info_t* mi = calloc(1, sizeof(map_info_t) + name_len + 1);
-    if (mi) {
-        mi->start = start;
-        mi->end = end;
-        mi->is_readable = strlen(permissions) == 4 && permissions[0] == 'r';
-        mi->is_writable = strlen(permissions) == 4 && permissions[1] == 'w';
-        mi->is_executable = strlen(permissions) == 4 && permissions[2] == 'x';
-        mi->data = NULL;
-        memcpy(mi->name, name, name_len);
-        mi->name[name_len] = '\0';
-        ALOGV("Parsed map: start=0x%08x, end=0x%08x, "
-              "is_readable=%d, is_writable=%d, is_executable=%d, name=%s",
-              mi->start, mi->end,
-              mi->is_readable, mi->is_writable, mi->is_executable, mi->name);
-    }
-    return mi;
-}
-
-map_info_t* load_map_info_list(pid_t tid) {
-    char path[PATH_MAX];
-    char line[1024];
-    FILE* fp;
-    map_info_t* milist = NULL;
-
-    snprintf(path, PATH_MAX, "/proc/%d/maps", tid);
-    fp = fopen(path, "r");
-    if (fp) {
-        while(fgets(line, sizeof(line), fp)) {
-            map_info_t* mi = parse_maps_line(line);
-            if (mi) {
-                mi->next = milist;
-                milist = mi;
-            }
-        }
-        fclose(fp);
-    }
-    return milist;
-}
-
-#endif
-
-void free_map_info_list(map_info_t* milist) {
-    while (milist) {
-        map_info_t* next = milist->next;
-        free(milist);
-        milist = next;
-    }
-}
-
-const map_info_t* find_map_info(const map_info_t* milist, uintptr_t addr) {
-    const map_info_t* mi = milist;
-    while (mi && !(addr >= mi->start && addr < mi->end)) {
-        mi = mi->next;
-    }
-    return mi;
-}
-
-bool is_readable_map(const map_info_t* milist, uintptr_t addr) {
-    const map_info_t* mi = find_map_info(milist, addr);
-    return mi && mi->is_readable;
-}
-
-bool is_writable_map(const map_info_t* milist, uintptr_t addr) {
-    const map_info_t* mi = find_map_info(milist, addr);
-    return mi && mi->is_writable;
-}
-
-bool is_executable_map(const map_info_t* milist, uintptr_t addr) {
-    const map_info_t* mi = find_map_info(milist, addr);
-    return mi && mi->is_executable;
-}
-
-static pthread_mutex_t g_my_map_info_list_mutex = PTHREAD_MUTEX_INITIALIZER;
-static map_info_t* g_my_map_info_list = NULL;
-
-static const int64_t MAX_CACHE_AGE = 5 * 1000 * 1000000LL;
-
-typedef struct {
-    uint32_t refs;
-    int64_t timestamp;
-} my_map_info_data_t;
-
-static int64_t now_ns() {
-#if defined(HAVE_POSIX_CLOCKS)
-    struct timespec t;
-    t.tv_sec = t.tv_nsec = 0;
-    clock_gettime(CLOCK_MONOTONIC, &t);
-    return t.tv_sec * 1000000000LL + t.tv_nsec;
-#else
-    struct timeval t;
-    gettimeofday(&t, NULL);
-    return t.tv_sec * 1000000000LL + t.tv_usec * 1000LL;
-#endif
-}
-
-static void dec_ref(map_info_t* milist, my_map_info_data_t* data) {
-    if (!--data->refs) {
-        ALOGV("Freed my_map_info_list %p.", milist);
-        free(data);
-        free_map_info_list(milist);
-    }
-}
-
-map_info_t* acquire_my_map_info_list() {
-    pthread_mutex_lock(&g_my_map_info_list_mutex);
-
-    int64_t time = now_ns();
-    if (g_my_map_info_list != NULL) {
-        my_map_info_data_t* data = (my_map_info_data_t*)g_my_map_info_list->data;
-        int64_t age = time - data->timestamp;
-        if (age >= MAX_CACHE_AGE) {
-            ALOGV("Invalidated my_map_info_list %p, age=%lld.", g_my_map_info_list, age);
-            dec_ref(g_my_map_info_list, data);
-            g_my_map_info_list = NULL;
-        } else {
-            ALOGV("Reusing my_map_info_list %p, age=%lld.", g_my_map_info_list, age);
-        }
-    }
-
-    if (g_my_map_info_list == NULL) {
-        my_map_info_data_t* data = (my_map_info_data_t*)malloc(sizeof(my_map_info_data_t));
-        g_my_map_info_list = load_map_info_list(getpid());
-        if (g_my_map_info_list != NULL) {
-            ALOGV("Loaded my_map_info_list %p.", g_my_map_info_list);
-            g_my_map_info_list->data = data;
-            data->refs = 1;
-            data->timestamp = time;
-        } else {
-            free(data);
-        }
-    }
-
-    map_info_t* milist = g_my_map_info_list;
-    if (milist) {
-        my_map_info_data_t* data = (my_map_info_data_t*)g_my_map_info_list->data;
-        data->refs += 1;
-    }
-
-    pthread_mutex_unlock(&g_my_map_info_list_mutex);
-    return milist;
-}
-
-void release_my_map_info_list(map_info_t* milist) {
-    if (milist) {
-        pthread_mutex_lock(&g_my_map_info_list_mutex);
-
-        my_map_info_data_t* data = (my_map_info_data_t*)milist->data;
-        dec_ref(milist, data);
-
-        pthread_mutex_unlock(&g_my_map_info_list_mutex);
-    }
-}
-
-void flush_my_map_info_list() {
-    pthread_mutex_lock(&g_my_map_info_list_mutex);
-
-    if (g_my_map_info_list != NULL) {
-        my_map_info_data_t* data = (my_map_info_data_t*) g_my_map_info_list->data;
-        dec_ref(g_my_map_info_list, data);
-        g_my_map_info_list = NULL;
-    }
-
-    pthread_mutex_unlock(&g_my_map_info_list_mutex);
-}
diff --git a/libcorkscrew/ptrace-arch.h b/libcorkscrew/ptrace-arch.h
deleted file mode 100755
index 0bcff63..0000000
--- a/libcorkscrew/ptrace-arch.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/* Architecture dependent functions. */
-
-#ifndef _CORKSCREW_PTRACE_ARCH_H
-#define _CORKSCREW_PTRACE_ARCH_H
-
-#include <corkscrew/ptrace.h>
-#include <corkscrew/map_info.h>
-#include <corkscrew/symbol_table.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* Custom extra data we stuff into map_info_t structures as part
- * of our ptrace_context_t. */
-typedef struct {
-#ifdef __arm__
-    uintptr_t exidx_start;
-    size_t exidx_size;
-#elif __mips__
-    uintptr_t eh_frame_hdr;
-#elif __i386__
-    uintptr_t eh_frame_hdr;
-#endif
-    symbol_table_t* symbol_table;
-} map_info_data_t;
-
-void load_ptrace_map_info_data_arch(pid_t pid, map_info_t* mi, map_info_data_t* data);
-void free_ptrace_map_info_data_arch(map_info_t* mi, map_info_data_t* data);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif // _CORKSCREW_PTRACE_ARCH_H
diff --git a/libcorkscrew/ptrace.c b/libcorkscrew/ptrace.c
deleted file mode 100644
index be58f7f..0000000
--- a/libcorkscrew/ptrace.c
+++ /dev/null
@@ -1,152 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "Corkscrew"
-//#define LOG_NDEBUG 0
-
-#include "ptrace-arch.h"
-#include <corkscrew/ptrace.h>
-
-#include <errno.h>
-#include <stdlib.h>
-#include <sys/ptrace.h>
-#include <cutils/log.h>
-
-static const uint32_t ELF_MAGIC = 0x464C457f; // "ELF\0177"
-
-#ifndef PAGE_SIZE
-#define PAGE_SIZE 4096
-#endif
-
-#ifndef PAGE_MASK
-#define PAGE_MASK (~(PAGE_SIZE - 1))
-#endif
-
-void init_memory(memory_t* memory, const map_info_t* map_info_list) {
-    memory->tid = -1;
-    memory->map_info_list = map_info_list;
-}
-
-void init_memory_ptrace(memory_t* memory, pid_t tid) {
-    memory->tid = tid;
-    memory->map_info_list = NULL;
-}
-
-bool try_get_word(const memory_t* memory, uintptr_t ptr, uint32_t* out_value) {
-    ALOGV("try_get_word: reading word at %p", (void*) ptr);
-    if (ptr & 3) {
-        ALOGV("try_get_word: invalid pointer %p", (void*) ptr);
-        *out_value = 0xffffffffL;
-        return false;
-    }
-    if (memory->tid < 0) {
-        if (!is_readable_map(memory->map_info_list, ptr)) {
-            ALOGV("try_get_word: pointer %p not in a readable map", (void*) ptr);
-            *out_value = 0xffffffffL;
-            return false;
-        }
-        *out_value = *(uint32_t*)ptr;
-        return true;
-    } else {
-#if defined(__APPLE__)
-        ALOGV("no ptrace on Mac OS");
-        return false;
-#else
-        // ptrace() returns -1 and sets errno when the operation fails.
-        // To disambiguate -1 from a valid result, we clear errno beforehand.
-        errno = 0;
-        *out_value = ptrace(PTRACE_PEEKTEXT, memory->tid, (void*)ptr, NULL);
-        if (*out_value == 0xffffffffL && errno) {
-            ALOGV("try_get_word: invalid pointer 0x%08x reading from tid %d, "
-                    "ptrace() errno=%d", ptr, memory->tid, errno);
-            return false;
-        }
-        return true;
-#endif
-    }
-}
-
-bool try_get_word_ptrace(pid_t tid, uintptr_t ptr, uint32_t* out_value) {
-    memory_t memory;
-    init_memory_ptrace(&memory, tid);
-    return try_get_word(&memory, ptr, out_value);
-}
-
-static void load_ptrace_map_info_data(pid_t pid, map_info_t* mi) {
-    if (mi->is_executable && mi->is_readable) {
-        uint32_t elf_magic;
-        if (try_get_word_ptrace(pid, mi->start, &elf_magic) && elf_magic == ELF_MAGIC) {
-            map_info_data_t* data = (map_info_data_t*)calloc(1, sizeof(map_info_data_t));
-            if (data) {
-                mi->data = data;
-                if (mi->name[0]) {
-                    data->symbol_table = load_symbol_table(mi->name);
-                }
-#ifdef CORKSCREW_HAVE_ARCH
-                load_ptrace_map_info_data_arch(pid, mi, data);
-#endif
-            }
-        }
-    }
-}
-
-ptrace_context_t* load_ptrace_context(pid_t pid) {
-    ptrace_context_t* context =
-            (ptrace_context_t*)calloc(1, sizeof(ptrace_context_t));
-    if (context) {
-        context->map_info_list = load_map_info_list(pid);
-        for (map_info_t* mi = context->map_info_list; mi; mi = mi->next) {
-            load_ptrace_map_info_data(pid, mi);
-        }
-    }
-    return context;
-}
-
-static void free_ptrace_map_info_data(map_info_t* mi) {
-    map_info_data_t* data = (map_info_data_t*)mi->data;
-    if (data) {
-        if (data->symbol_table) {
-            free_symbol_table(data->symbol_table);
-        }
-#ifdef CORKSCREW_HAVE_ARCH
-        free_ptrace_map_info_data_arch(mi, data);
-#endif
-        free(data);
-        mi->data = NULL;
-    }
-}
-
-void free_ptrace_context(ptrace_context_t* context) {
-    for (map_info_t* mi = context->map_info_list; mi; mi = mi->next) {
-        free_ptrace_map_info_data(mi);
-    }
-    free_map_info_list(context->map_info_list);
-    free(context);
-}
-
-void find_symbol_ptrace(const ptrace_context_t* context,
-        uintptr_t addr, const map_info_t** out_map_info, const symbol_t** out_symbol) {
-    const map_info_t* mi = find_map_info(context->map_info_list, addr);
-    const symbol_t* symbol = NULL;
-    if (mi) {
-        const map_info_data_t* data = (const map_info_data_t*)mi->data;
-        if (data && data->symbol_table) {
-            symbol = find_symbol(data->symbol_table, addr - mi->start);
-        }
-    }
-    *out_map_info = mi;
-    *out_symbol = symbol;
-}
diff --git a/libcorkscrew/symbol_table.c b/libcorkscrew/symbol_table.c
deleted file mode 100644
index 982ccc8..0000000
--- a/libcorkscrew/symbol_table.c
+++ /dev/null
@@ -1,227 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "Corkscrew"
-//#define LOG_NDEBUG 0
-
-#include <corkscrew/symbol_table.h>
-
-#include <stdbool.h>
-#include <stdlib.h>
-#include <fcntl.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <cutils/log.h>
-
-#if defined(__APPLE__)
-#else
-
-#include <elf.h>
-
-static bool is_elf(Elf32_Ehdr* e) {
-    return (e->e_ident[EI_MAG0] == ELFMAG0 &&
-            e->e_ident[EI_MAG1] == ELFMAG1 &&
-            e->e_ident[EI_MAG2] == ELFMAG2 &&
-            e->e_ident[EI_MAG3] == ELFMAG3);
-}
-
-#endif
-
-// Compare function for qsort
-static int qcompar(const void *a, const void *b) {
-    const symbol_t* asym = (const symbol_t*)a;
-    const symbol_t* bsym = (const symbol_t*)b;
-    if (asym->start > bsym->start) return 1;
-    if (asym->start < bsym->start) return -1;
-    return 0;
-}
-
-// Compare function for bsearch
-static int bcompar(const void *key, const void *element) {
-    uintptr_t addr = *(const uintptr_t*)key;
-    const symbol_t* symbol = (const symbol_t*)element;
-    if (addr < symbol->start) return -1;
-    if (addr >= symbol->end) return 1;
-    return 0;
-}
-
-symbol_table_t* load_symbol_table(const char *filename) {
-    symbol_table_t* table = NULL;
-#if !defined(__APPLE__)
-    ALOGV("Loading symbol table from '%s'.", filename);
-
-    int fd = open(filename, O_RDONLY);
-    if (fd < 0) {
-        goto out;
-    }
-
-    struct stat sb;
-    if (fstat(fd, &sb)) {
-        goto out_close;
-    }
-
-    size_t length = sb.st_size;
-    char* base = mmap(NULL, length, PROT_READ, MAP_PRIVATE, fd, 0);
-    if (base == MAP_FAILED) {
-        goto out_close;
-    }
-
-    // Parse the file header
-    Elf32_Ehdr *hdr = (Elf32_Ehdr*)base;
-    if (!is_elf(hdr)) {
-        goto out_close;
-    }
-    Elf32_Shdr *shdr = (Elf32_Shdr*)(base + hdr->e_shoff);
-
-    // Search for the dynamic symbols section
-    int sym_idx = -1;
-    int dynsym_idx = -1;
-    for (Elf32_Half i = 0; i < hdr->e_shnum; i++) {
-        if (shdr[i].sh_type == SHT_SYMTAB) {
-            sym_idx = i;
-        }
-        if (shdr[i].sh_type == SHT_DYNSYM) {
-            dynsym_idx = i;
-        }
-    }
-    if (dynsym_idx == -1 && sym_idx == -1) {
-        goto out_unmap;
-    }
-
-    table = malloc(sizeof(symbol_table_t));
-    if(!table) {
-        goto out_unmap;
-    }
-    table->num_symbols = 0;
-
-    Elf32_Sym *dynsyms = NULL;
-    int dynnumsyms = 0;
-    char *dynstr = NULL;
-    if (dynsym_idx != -1) {
-        dynsyms = (Elf32_Sym*)(base + shdr[dynsym_idx].sh_offset);
-        dynnumsyms = shdr[dynsym_idx].sh_size / shdr[dynsym_idx].sh_entsize;
-        int dynstr_idx = shdr[dynsym_idx].sh_link;
-        dynstr = base + shdr[dynstr_idx].sh_offset;
-    }
-
-    Elf32_Sym *syms = NULL;
-    int numsyms = 0;
-    char *str = NULL;
-    if (sym_idx != -1) {
-        syms = (Elf32_Sym*)(base + shdr[sym_idx].sh_offset);
-        numsyms = shdr[sym_idx].sh_size / shdr[sym_idx].sh_entsize;
-        int str_idx = shdr[sym_idx].sh_link;
-        str = base + shdr[str_idx].sh_offset;
-    }
-
-    int dynsymbol_count = 0;
-    if (dynsym_idx != -1) {
-        // Iterate through the dynamic symbol table, and count how many symbols
-        // are actually defined
-        for (int i = 0; i < dynnumsyms; i++) {
-            if (dynsyms[i].st_shndx != SHN_UNDEF) {
-                dynsymbol_count++;
-            }
-        }
-    }
-
-    size_t symbol_count = 0;
-    if (sym_idx != -1) {
-        // Iterate through the symbol table, and count how many symbols
-        // are actually defined
-        for (int i = 0; i < numsyms; i++) {
-            if (syms[i].st_shndx != SHN_UNDEF
-                    && str[syms[i].st_name]
-                    && syms[i].st_value
-                    && syms[i].st_size) {
-                symbol_count++;
-            }
-        }
-    }
-
-    // Now, create an entry in our symbol table structure for each symbol...
-    table->num_symbols += symbol_count + dynsymbol_count;
-    table->symbols = malloc(table->num_symbols * sizeof(symbol_t));
-    if (!table->symbols) {
-        free(table);
-        table = NULL;
-        goto out_unmap;
-    }
-
-    size_t symbol_index = 0;
-    if (dynsym_idx != -1) {
-        // ...and populate them
-        for (int i = 0; i < dynnumsyms; i++) {
-            if (dynsyms[i].st_shndx != SHN_UNDEF) {
-                table->symbols[symbol_index].name = strdup(dynstr + dynsyms[i].st_name);
-                table->symbols[symbol_index].start = dynsyms[i].st_value;
-                table->symbols[symbol_index].end = dynsyms[i].st_value + dynsyms[i].st_size;
-                ALOGV("  [%d] '%s' 0x%08x-0x%08x (DYNAMIC)",
-                        symbol_index, table->symbols[symbol_index].name,
-                        table->symbols[symbol_index].start, table->symbols[symbol_index].end);
-                symbol_index += 1;
-            }
-        }
-    }
-
-    if (sym_idx != -1) {
-        // ...and populate them
-        for (int i = 0; i < numsyms; i++) {
-            if (syms[i].st_shndx != SHN_UNDEF
-                    && str[syms[i].st_name]
-                    && syms[i].st_value
-                    && syms[i].st_size) {
-                table->symbols[symbol_index].name = strdup(str + syms[i].st_name);
-                table->symbols[symbol_index].start = syms[i].st_value;
-                table->symbols[symbol_index].end = syms[i].st_value + syms[i].st_size;
-                ALOGV("  [%d] '%s' 0x%08x-0x%08x",
-                        symbol_index, table->symbols[symbol_index].name,
-                        table->symbols[symbol_index].start, table->symbols[symbol_index].end);
-                symbol_index += 1;
-            }
-        }
-    }
-
-    // Sort the symbol table entries, so they can be bsearched later
-    qsort(table->symbols, table->num_symbols, sizeof(symbol_t), qcompar);
-
-out_unmap:
-    munmap(base, length);
-
-out_close:
-    close(fd);
-#endif
-
-out:
-    return table;
-}
-
-void free_symbol_table(symbol_table_t* table) {
-    if (table) {
-        for (size_t i = 0; i < table->num_symbols; i++) {
-            free(table->symbols[i].name);
-        }
-        free(table->symbols);
-        free(table);
-    }
-}
-
-const symbol_t* find_symbol(const symbol_table_t* table, uintptr_t addr) {
-    if (!table) return NULL;
-    return (const symbol_t*)bsearch(&addr, table->symbols, table->num_symbols,
-            sizeof(symbol_t), bcompar);
-}
diff --git a/libcorkscrew/test.cpp b/libcorkscrew/test.cpp
deleted file mode 100644
index 22dfa7d..0000000
--- a/libcorkscrew/test.cpp
+++ /dev/null
@@ -1,76 +0,0 @@
-#include <corkscrew/backtrace.h>
-#include <corkscrew/symbol_table.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-int do_backtrace(float /* just to test demangling */) {
-  const size_t MAX_DEPTH = 32;
-  backtrace_frame_t* frames = (backtrace_frame_t*) malloc(sizeof(backtrace_frame_t) * MAX_DEPTH);
-  ssize_t frame_count = unwind_backtrace(frames, 0, MAX_DEPTH);
-  fprintf(stderr, "frame_count=%d\n", (int) frame_count);
-  if (frame_count <= 0) {
-    return frame_count;
-  }
-
-  backtrace_symbol_t* backtrace_symbols = (backtrace_symbol_t*) malloc(sizeof(backtrace_symbol_t) * frame_count);
-  get_backtrace_symbols(frames, frame_count, backtrace_symbols);
-
-  for (size_t i = 0; i < (size_t) frame_count; ++i) {
-    char line[MAX_BACKTRACE_LINE_LENGTH];
-    format_backtrace_line(i, &frames[i], &backtrace_symbols[i],
-                          line, MAX_BACKTRACE_LINE_LENGTH);
-    if (backtrace_symbols[i].symbol_name != NULL) {
-      // get_backtrace_symbols found the symbol's name with dladdr(3).
-      fprintf(stderr, "  %s\n", line);
-    } else {
-      // We don't have a symbol. Maybe this is a static symbol, and
-      // we can look it up?
-      symbol_table_t* symbols = NULL;
-      if (backtrace_symbols[i].map_name != NULL) {
-        symbols = load_symbol_table(backtrace_symbols[i].map_name);
-      }
-      const symbol_t* symbol = NULL;
-      if (symbols != NULL) {
-        symbol = find_symbol(symbols, frames[i].absolute_pc);
-      }
-      if (symbol != NULL) {
-        int offset = frames[i].absolute_pc - symbol->start;
-        fprintf(stderr, "  %s (%s%+d)\n", line, symbol->name, offset);
-      } else {
-        fprintf(stderr, "  %s (\?\?\?)\n", line);
-      }
-      free_symbol_table(symbols);
-    }
-  }
-
-  free_backtrace_symbols(backtrace_symbols, frame_count);
-  free(backtrace_symbols);
-  free(frames);
-  return frame_count;
-}
-
-struct C {
-  int g(int i);
-};
-
-__attribute__ ((noinline)) int C::g(int i) {
-  if (i == 0) {
-    return do_backtrace(0.1);
-  }
-  return g(i - 1);
-}
-
-extern "C" __attribute__ ((noinline)) int f() {
-  C c;
-  return c.g(5);
-}
-
-int main() {
-  flush_my_map_info_list();
-  f();
-
-  flush_my_map_info_list();
-  f();
-
-  return 0;
-}