1 files changed, 140 insertions, 0 deletions
diff --git a/libcorkscrew/arch-x86/dwarf.h b/libcorkscrew/arch-x86/dwarf.h
new file mode 100755
index 0000000..962fc55
--- /dev/null
+++ b/libcorkscrew/arch-x86/dwarf.h
@@ -0,0 +1,140 @@
+/*
+ * 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
+
+