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Tracking some function calls

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This commit is contained in:
Pierre Pronchery 2011-09-07 23:07:55 +00:00
parent a05c936369
commit aa865b0703
1 changed files with 102 additions and 0 deletions
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102
src/format/elf.c
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@ -350,6 +350,8 @@ static int _decode32_addr(FormatPlugin * format, Elf32_Ehdr * ehdr,
static int _decode32_strtab(FormatPlugin * format, Elf32_Shdr * shdr, static int _decode32_strtab(FormatPlugin * format, Elf32_Shdr * shdr,
size_t shdr_cnt, uint16_t ndx, char ** strtab, size_t shdr_cnt, uint16_t ndx, char ** strtab,
size_t * strtab_cnt); size_t * strtab_cnt);
static int _decode32_symtab(FormatPlugin * format, Elf32_Shdr * shdr,
size_t shdr_cnt, uint16_t ndx);
static int _elf_decode32(FormatPlugin * format, int raw) static int _elf_decode32(FormatPlugin * format, int raw)
{ {
@ -381,6 +383,13 @@ static int _elf_decode32(FormatPlugin * format, int raw)
free(shdr); free(shdr);
return -1; return -1;
} }
for(i = 0; i < ehdr.e_shnum; i++)
if(shdr[i].sh_type == SHT_SYMTAB)
{
/* XXX ignore errors? */
_decode32_symtab(format, shdr, ehdr.e_shnum, i);
break;
}
for(i = 0; i < ehdr.e_shnum; i++) for(i = 0; i < ehdr.e_shnum; i++)
{ {
if(shdr[i].sh_name >= shstrtab_cnt) if(shdr[i].sh_name >= shstrtab_cnt)
@ -480,6 +489,48 @@ static int _decode32_strtab(FormatPlugin * format, Elf32_Shdr * shdr,
return 0; return 0;
} }
static int _decode32_symtab(FormatPlugin * format, Elf32_Shdr * shdr,
size_t shdr_cnt, uint16_t ndx)
{
FormatPluginHelper * helper = format->helper;
char * strtab = NULL;
size_t strtab_cnt = 0;
Elf32_Sym sym;
size_t i;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
if(ndx >= shdr_cnt || shdr[ndx].sh_entsize != sizeof(sym))
return -1;
if(_decode32_strtab(format, shdr, shdr_cnt, shdr[ndx].sh_link, &strtab,
&strtab_cnt) != 0)
return -1;
/* read and process symbols */
if(helper->seek(helper->format, shdr[ndx].sh_offset, SEEK_SET)
!= shdr[ndx].sh_offset)
{
free(strtab);
return -1;
}
for(i = 0; i * sizeof(sym) < shdr[ndx].sh_size; i++)
if(helper->read(helper->format, &sym, sizeof(sym))
!= sizeof(sym))
break;
else if(sym.st_name >= strtab_cnt)
break;
else if(ELF32_ST_TYPE(sym.st_info) == STT_FUNC)
/* record the function */
helper->set_function(helper->format, sym.st_value,
&strtab[sym.st_name], -1, sym.st_size);
if(i * sizeof(sym) != shdr[ndx].sh_size)
{
free(strtab);
return -1;
}
return 0;
}
/* elf_decode64 */ /* elf_decode64 */
static int _decode64_shdr(FormatPlugin * format, Elf64_Ehdr * ehdr, static int _decode64_shdr(FormatPlugin * format, Elf64_Ehdr * ehdr,
@ -489,6 +540,8 @@ static int _decode64_addr(FormatPlugin * format, Elf64_Ehdr * ehdr,
static int _decode64_strtab(FormatPlugin * format, Elf64_Shdr * shdr, static int _decode64_strtab(FormatPlugin * format, Elf64_Shdr * shdr,
size_t shdr_cnt, uint16_t ndx, char ** strtab, size_t shdr_cnt, uint16_t ndx, char ** strtab,
size_t * strtab_cnt); size_t * strtab_cnt);
static int _decode64_symtab(FormatPlugin * format, Elf64_Shdr * shdr,
size_t shdr_cnt, uint16_t ndx);
static int _elf_decode64(FormatPlugin * format, int raw) static int _elf_decode64(FormatPlugin * format, int raw)
{ {
@ -519,6 +572,13 @@ static int _elf_decode64(FormatPlugin * format, int raw)
free(shdr); free(shdr);
return -1; return -1;
} }
for(i = 0; i < ehdr.e_shnum; i++)
if(shdr[i].sh_type == SHT_SYMTAB)
{
/* XXX ignore errors? */
_decode64_symtab(format, shdr, ehdr.e_shnum, i);
break;
}
for(i = 0; i < ehdr.e_shnum; i++) for(i = 0; i < ehdr.e_shnum; i++)
{ {
if(shdr[i].sh_name >= shstrtab_cnt) if(shdr[i].sh_name >= shstrtab_cnt)
@ -619,6 +679,48 @@ static int _decode64_strtab(FormatPlugin * format, Elf64_Shdr * shdr,
return 0; return 0;
} }
static int _decode64_symtab(FormatPlugin * format, Elf64_Shdr * shdr,
size_t shdr_cnt, uint16_t ndx)
{
FormatPluginHelper * helper = format->helper;
char * strtab = NULL;
size_t strtab_cnt = 0;
Elf64_Sym sym;
size_t i;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
if(ndx >= shdr_cnt || shdr[ndx].sh_entsize != sizeof(sym))
return -1;
if(_decode64_strtab(format, shdr, shdr_cnt, shdr[ndx].sh_link, &strtab,
&strtab_cnt) != 0)
return -1;
/* read and process symbols */
if(helper->seek(helper->format, shdr[ndx].sh_offset, SEEK_SET)
!= shdr[ndx].sh_offset)
{
free(strtab);
return -1;
}
for(i = 0; i * sizeof(sym) < shdr[ndx].sh_size; i++)
if(helper->read(helper->format, &sym, sizeof(sym))
!= sizeof(sym))
break;
else if(sym.st_name >= strtab_cnt)
break;
else if(ELF64_ST_TYPE(sym.st_info) == STT_FUNC)
/* record the function */
helper->set_function(helper->format, sym.st_value,
&strtab[sym.st_name], -1, sym.st_size);
if(i * sizeof(sym) != shdr[ndx].sh_size)
{
free(strtab);
return -1;
}
return 0;
}
/* section_values */ /* section_values */
static ElfSectionValues * _section_values(char const * name) static ElfSectionValues * _section_values(char const * name)