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When creating a staticaly linked ELF program should not include

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any dyn symbols. The if( !s1->static_link ) prevents tcc from
crashing when buiding a program linked to dietlibc.

The section header should not contain the number of local symbols when
the sh_size is null. This makes the header compliant and IDA will not
issue any warnings when an executable is disassembled.
This commit is contained in:
Emil 2017-06-09 19:44:29 +01:00
parent 3e4b7693bf
commit 3e028af453
1 changed files with 7 additions and 5 deletions
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12
tccelf.c
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@ -679,7 +679,8 @@ static void sort_syms(TCCState *s1, Section *s)
p++; p++;
} }
/* save the number of local symbols in section header */ /* save the number of local symbols in section header */
s->sh_info = q - new_syms; if( s->sh_size ) /* this 'if' makes IDA happy */
s->sh_info = q - new_syms;
/* then second pass for non local symbols */ /* then second pass for non local symbols */
p = (ElfW(Sym) *)s->data; p = (ElfW(Sym) *)s->data;
@ -1985,10 +1986,11 @@ static void tidy_section_headers(TCCState *s1, int *sec_order)
for_each_elem(symtab_section, 1, sym, ElfW(Sym)) for_each_elem(symtab_section, 1, sym, ElfW(Sym))
if (sym->st_shndx != SHN_UNDEF && sym->st_shndx < SHN_LORESERVE) if (sym->st_shndx != SHN_UNDEF && sym->st_shndx < SHN_LORESERVE)
sym->st_shndx = backmap[sym->st_shndx]; sym->st_shndx = backmap[sym->st_shndx];
for_each_elem(s1->dynsym, 1, sym, ElfW(Sym)) if( !s1->static_link ) {
if (sym->st_shndx != SHN_UNDEF && sym->st_shndx < SHN_LORESERVE) for_each_elem(s1->dynsym, 1, sym, ElfW(Sym))
sym->st_shndx = backmap[sym->st_shndx]; if (sym->st_shndx != SHN_UNDEF && sym->st_shndx < SHN_LORESERVE)
sym->st_shndx = backmap[sym->st_shndx];
}
for (i = 0; i < s1->nb_sections; i++) for (i = 0; i < s1->nb_sections; i++)
sec_order[i] = i; sec_order[i] = i;
tcc_free(s1->sections); tcc_free(s1->sections);