AArch64: Port debuggerd

Change-Id: Ib18f76f375a1d70c84e0a09d221e17ac43144b96
Signed-off-by: Kévin PETIT <kevin.petit@arm.com>

1 files changed, 123 insertions, 0 deletions

diff --git a/debuggerd/arm64/machine.cpp b/debuggerd/arm64/machine.cpp
new file mode 100644
index 0000000..7159228
--- /dev/null
+++ b/debuggerd/arm64/machine.cpp
@@ -0,0 +1,123 @@
+/*
+ *
+ * Copyright 2014, 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.
+ */
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/ptrace.h>
+#include <sys/user.h>
+#include <sys/uio.h>
+#include <linux/elf.h>
+
+#include "../utility.h"
+#include "../machine.h"
+
+/* enable to dump memory pointed to by every register */
+#define DUMP_MEMORY_FOR_ALL_REGISTERS 1
+
+/*
+ * If configured to do so, dump memory around *all* registers
+ * for the crashing thread.
+ */
+void dump_memory_and_code(log_t* log, pid_t tid, int scope_flags) {
+    struct user_pt_regs regs;
+    struct iovec io;
+    io.iov_base = &regs;
+    io.iov_len = sizeof(regs);
+
+    if (ptrace(PTRACE_GETREGSET, tid, (void*)NT_PRSTATUS, &io) == -1) {
+        _LOG(log, scope_flags, "%s: ptrace failed to get registers: %s\n",
+             __func__, strerror(errno));
+        return;
+    }
+
+    if (IS_AT_FAULT(scope_flags) && DUMP_MEMORY_FOR_ALL_REGISTERS) {
+        for (int reg = 0; reg < 31; reg++) {
+            uintptr_t addr = regs.regs[reg];
+
+            /*
+             * Don't bother if it looks like a small int or ~= null, or if
+             * it's in the kernel area.
+             */
+            if (addr < 4096 || addr >= (1UL<<63)) {
+                continue;
+            }
+
+            _LOG(log, scope_flags | SCOPE_SENSITIVE, "\nmemory near x%d:\n", reg);
+            dump_memory(log, tid, addr, scope_flags | SCOPE_SENSITIVE);
+        }
+    }
+
+    _LOG(log, scope_flags, "\ncode around pc:\n");
+    dump_memory(log, tid, (uintptr_t)regs.pc, scope_flags);
+
+    if (regs.pc != regs.sp) {
+        _LOG(log, scope_flags, "\ncode around sp:\n");
+        dump_memory(log, tid, (uintptr_t)regs.sp, scope_flags);
+    }
+}
+
+void dump_registers(log_t* log, pid_t tid, int scope_flags)
+{
+  struct user_pt_regs r;
+  struct iovec io;
+  io.iov_base = &r;
+  io.iov_len = sizeof(r);
+
+  bool only_in_tombstone = !IS_AT_FAULT(scope_flags);
+
+  if (ptrace(PTRACE_GETREGSET, tid, (void*) NT_PRSTATUS, (void*) &io) == -1) {
+    _LOG(log, scope_flags, "ptrace error: %s\n", strerror(errno));
+    return;
+  }
+
+  for (int i = 0; i < 28; i += 4) {
+    _LOG(log, scope_flags, "    x%-2d  %016lx  x%-2d  %016lx  x%-2d  %016lx  x%-2d  %016lx\n",
+         i, (uint64_t)r.regs[i],
+         i+1, (uint64_t)r.regs[i+1],
+         i+2, (uint64_t)r.regs[i+2],
+         i+3, (uint64_t)r.regs[i+3]);
+  }
+
+  _LOG(log, scope_flags, "    x28  %016lx  x29  %016lx  x30  %016lx\n",
+       (uint64_t)r.regs[28], (uint64_t)r.regs[29], (uint64_t)r.regs[30]);
+
+  _LOG(log, scope_flags, "    sp   %016lx  pc   %016lx\n",
+       (uint64_t)r.sp, (uint64_t)r.pc);
+
+
+  struct user_fpsimd_state f;
+  io.iov_base = &f;
+  io.iov_len = sizeof(f);
+
+  if (ptrace(PTRACE_GETREGSET, tid, (void*) NT_PRFPREG, (void*) &io) == -1) {
+    _LOG(log, scope_flags, "ptrace error: %s\n", strerror(errno));
+    return;
+  }
+
+  for (int i = 0; i < 32; i += 4) {
+    _LOG(log, scope_flags, "    v%-2d  %016lx  v%-2d  %016lx  v%-2d  %016lx  v%-2d  %016lx\n",
+         i, (uint64_t)f.vregs[i],
+         i+1, (uint64_t)f.vregs[i+1],
+         i+2, (uint64_t)f.vregs[i+2],
+         i+3, (uint64_t)f.vregs[i+3]);
+  }
+}