84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
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/* system/debuggerd/utility.c
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**
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** Copyright 2008, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#include <sys/ptrace.h>
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#include <sys/exec_elf.h>
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#include <assert.h>
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#include <string.h>
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#include <errno.h>
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#include "utility.h"
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/* Get a word from pid using ptrace. The result is the return value. */
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int get_remote_word(int pid, void *src)
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{
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return ptrace(PTRACE_PEEKTEXT, pid, src, NULL);
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}
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/* Handy routine to read aggregated data from pid using ptrace. The read
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* values are written to the dest locations directly.
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*/
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void get_remote_struct(int pid, void *src, void *dst, size_t size)
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{
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unsigned int i;
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for (i = 0; i+4 <= size; i+=4) {
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*(int *)(dst+i) = ptrace(PTRACE_PEEKTEXT, pid, src+i, NULL);
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}
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if (i < size) {
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int val;
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assert((size - i) < 4);
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val = ptrace(PTRACE_PEEKTEXT, pid, src+i, NULL);
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while (i < size) {
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((unsigned char *)dst)[i] = val & 0xff;
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i++;
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val >>= 8;
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}
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}
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}
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/* Map a pc address to the name of the containing ELF file */
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const char *map_to_name(mapinfo *mi, unsigned pc, const char* def)
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{
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while(mi) {
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if((pc >= mi->start) && (pc < mi->end)){
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return mi->name;
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}
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mi = mi->next;
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}
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return def;
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}
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/* Find the containing map info for the pc */
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const mapinfo *pc_to_mapinfo(mapinfo *mi, unsigned pc, unsigned *rel_pc)
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{
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while(mi) {
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if((pc >= mi->start) && (pc < mi->end)){
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// Only calculate the relative offset for shared libraries
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if (strstr(mi->name, ".so")) {
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*rel_pc = pc - mi->start;
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}
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return mi;
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}
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mi = mi->next;
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}
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return NULL;
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}
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