| /* system/debuggerd/utility.c |
| ** |
| ** Copyright 2008, 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 <sys/ptrace.h> |
| #include <sys/exec_elf.h> |
| #include <assert.h> |
| #include <string.h> |
| #include <errno.h> |
| |
| #include "utility.h" |
| |
| /* Get a word from pid using ptrace. The result is the return value. */ |
| int get_remote_word(int pid, void *src) |
| { |
| return ptrace(PTRACE_PEEKTEXT, pid, src, NULL); |
| } |
| |
| |
| /* Handy routine to read aggregated data from pid using ptrace. The read |
| * values are written to the dest locations directly. |
| */ |
| void get_remote_struct(int pid, void *src, void *dst, size_t size) |
| { |
| unsigned int i; |
| |
| for (i = 0; i+4 <= size; i+=4) { |
| *(int *)(dst+i) = ptrace(PTRACE_PEEKTEXT, pid, src+i, NULL); |
| } |
| |
| if (i < size) { |
| int val; |
| |
| assert((size - i) < 4); |
| val = ptrace(PTRACE_PEEKTEXT, pid, src+i, NULL); |
| while (i < size) { |
| ((unsigned char *)dst)[i] = val & 0xff; |
| i++; |
| val >>= 8; |
| } |
| } |
| } |
| |
| /* Map a pc address to the name of the containing ELF file */ |
| const char *map_to_name(mapinfo *mi, unsigned pc, const char* def) |
| { |
| while(mi) { |
| if((pc >= mi->start) && (pc < mi->end)){ |
| return mi->name; |
| } |
| mi = mi->next; |
| } |
| return def; |
| } |
| |
| /* Find the containing map info for the pc */ |
| const mapinfo *pc_to_mapinfo(mapinfo *mi, unsigned pc, unsigned *rel_pc) |
| { |
| while(mi) { |
| if((pc >= mi->start) && (pc < mi->end)){ |
| // Only calculate the relative offset for shared libraries |
| if (strstr(mi->name, ".so")) { |
| *rel_pc = pc - mi->start; |
| } |
| return mi; |
| } |
| mi = mi->next; |
| } |
| return NULL; |
| } |