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Add option -e for setting ELF file's entry

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Ziyao 2022-04-18 14:26:15 +08:00
parent 0366924047
commit 39ea340a31
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GPG key ID: A32FA9E5C3BB744D
3 changed files with 12 additions and 2 deletions
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2
libtcc.c
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@ -1335,6 +1335,8 @@ static int tcc_set_linker(TCCState *s, const char *option)
s->symbolic = 1;
} else if (link_option(option, "nostdlib", &p)) {
s->nostdlib = 1;
} else if (link_option(option, "e=", &p)) {
copy_linker_arg(&s->elf_entryname, p, 0);
} else if (link_option(option, "fini=", &p)) {
copy_linker_arg(&s->fini_symbol, p, 0);
ignoring = 1;

2
tcc.h
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@ -961,6 +961,8 @@ struct TCCState {
Section *verneed_section;
#endif
char *elf_entryname;
#ifdef TCC_IS_NATIVE
const char *runtime_main;
void **runtime_mem;

10
tccelf.c
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@ -2322,11 +2322,17 @@ static void tcc_output_elf(TCCState *s1, FILE *f, int phnum, ElfW(Phdr) *phdr,
default:
case TCC_OUTPUT_EXE:
ehdr.e_type = ET_EXEC;
ehdr.e_entry = get_sym_addr(s1, "_start", 1, 0);
ehdr.e_entry = get_sym_addr(s1,
s1->elf_entryname ?
s1->elf_entryname : "_start",
1, 0);
break;
case TCC_OUTPUT_DLL:
ehdr.e_type = ET_DYN;
ehdr.e_entry = text_section->sh_addr; /* XXX: is it correct ? */
ehdr.e_entry = s1->elf_entryname ?
get_sym_addr(s1,s1->elf_entryname,1,0) :
text_section->sh_addr;
/* XXX: is it correct ? */
break;
case TCC_OUTPUT_OBJ:
ehdr.e_type = ET_REL;