diff options
Diffstat (limited to 'tcc.c')
| -rw-r--r-- | tcc.c | 46 |
1 files changed, 39 insertions, 7 deletions
@@ -6962,6 +6962,8 @@ static void tcc_add_runtime(TCCState *s1) { char buf[1024]; unsigned long *ptr; + int i; + Section *s; snprintf(buf, sizeof(buf), "%s/%s", tcc_lib_path, "libtcc1.o"); tcc_add_file(s1, buf); @@ -6999,6 +7001,38 @@ static void tcc_add_runtime(TCCState *s1) bss_section->data_offset, 0, ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), bss_section->sh_num, "_end"); + /* add start and stop symbols for sections whose name can be + expressed in C */ + for(i = 1; i < nb_sections; i++) { + s = sections[i]; + if (s->sh_type == SHT_PROGBITS && + (s->sh_flags & SHF_ALLOC)) { + const char *p; + int ch; + + /* check if section name can be expressed in C */ + p = s->name; + for(;;) { + ch = *p; + if (!ch) + break; + if (!isid(ch) && !isnum(ch)) + goto next_sec; + p++; + } + snprintf(buf, sizeof(buf), "__start_%s", s->name); + add_elf_sym(symtab_section, + 0, 0, + ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), + s->sh_num, buf); + snprintf(buf, sizeof(buf), "__stop_%s", s->name); + add_elf_sym(symtab_section, + s->data_offset, 0, + ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), + s->sh_num, buf); + } + next_sec: + } } /* add dynamic sections so that the executable is dynamically linked */ @@ -7115,13 +7149,11 @@ int tcc_output_file(TCCState *s1, const char *filename) bss_section->data_offset = offset; } } else { - /* STT_NOTYPE or STB_WEAK undefined symbols - are accepted */ - /* XXX: STT_NOTYPE is only used to exclude the - unreferenced '_fp_hw' symbol. need a better - solution */ - if (ELF32_ST_TYPE(sym->st_info) == STT_NOTYPE || - ELF32_ST_BIND(sym->st_info) == STB_WEAK) { + /* STB_WEAK undefined symbols are accepted */ + /* XXX: _fp_hw seems to be part of the ABI, so we ignore + it */ + if (ELF32_ST_BIND(sym->st_info) == STB_WEAK || + !strcmp(name, "_fp_hw")) { } else { error("undefined symbol '%s'", name); } |