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Mention function offsets when meaningful

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This commit is contained in:
Pierre Pronchery 2012-04-06 21:53:22 +00:00
parent 3207b9e855
commit 96ff511844
1 changed files with 34 additions and 18 deletions
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52
src/format/elf.c
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@ -365,8 +365,8 @@ 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, static int _decode32_symtab(FormatPlugin * format, Elf32_Ehdr * ehdr,
size_t shdr_cnt, uint16_t ndx); 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)
{ {
@ -402,7 +402,7 @@ static int _elf_decode32(FormatPlugin * format, int raw)
if(shdr[i].sh_type == SHT_SYMTAB) if(shdr[i].sh_type == SHT_SYMTAB)
{ {
/* XXX ignore errors? */ /* XXX ignore errors? */
_decode32_symtab(format, shdr, ehdr.e_shnum, i); _decode32_symtab(format, &ehdr, shdr, ehdr.e_shnum, i);
break; break;
} }
for(i = 0; i < ehdr.e_shnum; i++) for(i = 0; i < ehdr.e_shnum; i++)
@ -505,14 +505,15 @@ static int _decode32_strtab(FormatPlugin * format, Elf32_Shdr * shdr,
return 0; return 0;
} }
static int _decode32_symtab(FormatPlugin * format, Elf32_Shdr * shdr, static int _decode32_symtab(FormatPlugin * format, Elf32_Ehdr * ehdr,
size_t shdr_cnt, uint16_t ndx) Elf32_Shdr * shdr, size_t shdr_cnt, uint16_t ndx)
{ {
FormatPluginHelper * helper = format->helper; FormatPluginHelper * helper = format->helper;
char * strtab = NULL; char * strtab = NULL;
size_t strtab_cnt = 0; size_t strtab_cnt = 0;
Elf32_Sym sym; Elf32_Sym sym;
size_t i; size_t i;
off_t offset;
#ifdef DEBUG #ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__); fprintf(stderr, "DEBUG: %s()\n", __func__);
@ -523,8 +524,9 @@ static int _decode32_symtab(FormatPlugin * format, Elf32_Shdr * shdr,
&strtab_cnt) != 0) &strtab_cnt) != 0)
return -1; return -1;
/* read and process symbols */ /* read and process symbols */
if(helper->seek(helper->format, shdr[ndx].sh_offset, SEEK_SET) if((offset = helper->seek(helper->format, shdr[ndx].sh_offset,
!= shdr[ndx].sh_offset) SEEK_SET)) < 0
|| (unsigned long)offset != shdr[ndx].sh_offset)
{ {
free(strtab); free(strtab);
return -1; return -1;
@ -536,9 +538,15 @@ static int _decode32_symtab(FormatPlugin * format, Elf32_Shdr * shdr,
else if(sym.st_name >= strtab_cnt) else if(sym.st_name >= strtab_cnt)
break; break;
else if(ELF32_ST_TYPE(sym.st_info) == STT_FUNC) else if(ELF32_ST_TYPE(sym.st_info) == STT_FUNC)
{
offset = -1;
if(ehdr->e_type &= ET_REL)
offset = sym.st_value;
/* record the function */ /* record the function */
helper->set_function(helper->format, sym.st_value, helper->set_function(helper->format, i,
&strtab[sym.st_name], -1, sym.st_size); &strtab[sym.st_name], sym.st_value,
sym.st_size);
}
if(i * sizeof(sym) != shdr[ndx].sh_size) if(i * sizeof(sym) != shdr[ndx].sh_size)
{ {
free(strtab); free(strtab);
@ -556,8 +564,8 @@ 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, static int _decode64_symtab(FormatPlugin * format, Elf64_Ehdr * ehdr,
size_t shdr_cnt, uint16_t ndx); 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)
{ {
@ -592,7 +600,7 @@ static int _elf_decode64(FormatPlugin * format, int raw)
if(shdr[i].sh_type == SHT_SYMTAB) if(shdr[i].sh_type == SHT_SYMTAB)
{ {
/* XXX ignore errors? */ /* XXX ignore errors? */
_decode64_symtab(format, shdr, ehdr.e_shnum, i); _decode64_symtab(format, &ehdr, shdr, ehdr.e_shnum, i);
break; break;
} }
for(i = 0; i < ehdr.e_shnum; i++) for(i = 0; i < ehdr.e_shnum; i++)
@ -696,14 +704,15 @@ static int _decode64_strtab(FormatPlugin * format, Elf64_Shdr * shdr,
return 0; return 0;
} }
static int _decode64_symtab(FormatPlugin * format, Elf64_Shdr * shdr, static int _decode64_symtab(FormatPlugin * format, Elf64_Ehdr * ehdr,
size_t shdr_cnt, uint16_t ndx) Elf64_Shdr * shdr, size_t shdr_cnt, uint16_t ndx)
{ {
FormatPluginHelper * helper = format->helper; FormatPluginHelper * helper = format->helper;
char * strtab = NULL; char * strtab = NULL;
size_t strtab_cnt = 0; size_t strtab_cnt = 0;
Elf64_Sym sym; Elf64_Sym sym;
size_t i; size_t i;
off_t offset;
#ifdef DEBUG #ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__); fprintf(stderr, "DEBUG: %s()\n", __func__);
@ -714,8 +723,9 @@ static int _decode64_symtab(FormatPlugin * format, Elf64_Shdr * shdr,
&strtab_cnt) != 0) &strtab_cnt) != 0)
return -1; return -1;
/* read and process symbols */ /* read and process symbols */
if(helper->seek(helper->format, shdr[ndx].sh_offset, SEEK_SET) if((offset = helper->seek(helper->format, shdr[ndx].sh_offset,
!= shdr[ndx].sh_offset) SEEK_SET)) < 0
|| (unsigned long)offset != shdr[ndx].sh_offset)
{ {
free(strtab); free(strtab);
return -1; return -1;
@ -727,9 +737,15 @@ static int _decode64_symtab(FormatPlugin * format, Elf64_Shdr * shdr,
else if(sym.st_name >= strtab_cnt) else if(sym.st_name >= strtab_cnt)
break; break;
else if(ELF64_ST_TYPE(sym.st_info) == STT_FUNC) else if(ELF64_ST_TYPE(sym.st_info) == STT_FUNC)
{
offset = -1;
if(ehdr->e_type &= ET_REL)
offset = sym.st_value;
/* record the function */ /* record the function */
helper->set_function(helper->format, sym.st_value, helper->set_function(helper->format, i,
&strtab[sym.st_name], -1, sym.st_size); &strtab[sym.st_name], offset,
sym.st_size);
}
if(i * sizeof(sym) != shdr[ndx].sh_size) if(i * sizeof(sym) != shdr[ndx].sh_size)
{ {
free(strtab); free(strtab);