mirror of
https://github.com/frida/tinycc
synced 2024-11-28 18:43:07 +03:00
better st_other support
This commit is contained in:
bellard
parent
ef156f0c44
commit
d733dc752e
37
tccelf.c
37
tccelf.c
@ -178,7 +178,7 @@ void *tcc_get_symbol_err(TCCState *s, const char *name)
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/* add an elf symbol : check if it is already defined and patch
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it. Return symbol index. NOTE that sh_num can be SHN_UNDEF. */
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static int add_elf_sym(Section *s, unsigned long value, unsigned long size,
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int info, int sh_num, const char *name)
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int info, int other, int sh_num, const char *name)
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{
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Elf32_Sym *esym;
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int sym_bind, sym_index, sym_type, esym_bind;
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@ -217,11 +217,12 @@ static int add_elf_sym(Section *s, unsigned long value, unsigned long size,
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esym->st_shndx = sh_num;
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esym->st_value = value;
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esym->st_size = size;
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esym->st_other = other;
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}
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} else {
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do_def:
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sym_index = put_elf_sym(s, value, size,
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ELF32_ST_INFO(sym_bind, sym_type), 0,
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ELF32_ST_INFO(sym_bind, sym_type), other,
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sh_num, name);
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}
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return sym_index;
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@ -675,7 +676,7 @@ static void build_got(TCCState *s1)
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s1->got = new_section(s1, ".got", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
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s1->got->sh_entsize = 4;
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add_elf_sym(symtab_section, 0, 4, ELF32_ST_INFO(STB_GLOBAL, STT_OBJECT),
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s1->got->sh_num, "_GLOBAL_OFFSET_TABLE_");
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0, s1->got->sh_num, "_GLOBAL_OFFSET_TABLE_");
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ptr = section_ptr_add(s1->got, 3 * sizeof(int));
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/* keep space for _DYNAMIC pointer, if present */
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put32(ptr, 0);
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@ -943,11 +944,11 @@ static void add_init_array_defines(TCCState *s1, const char *section_name)
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add_elf_sym(symtab_section,
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0, 0,
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE),
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0,
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s->sh_num, sym_start);
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add_elf_sym(symtab_section,
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end_offset, 0,
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE),
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0,
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s->sh_num, sym_end);
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}
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@ -967,7 +968,7 @@ static void tcc_add_runtime(TCCState *s1)
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ptr = section_ptr_add(bounds_section, sizeof(unsigned long));
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*ptr = 0;
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add_elf_sym(symtab_section, 0, 0,
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE),
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0,
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bounds_section->sh_num, "__bounds_start");
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/* add bound check code */
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snprintf(buf, sizeof(buf), "%s/%s", tcc_lib_path, "bcheck.o");
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@ -1010,15 +1011,15 @@ static void tcc_add_linker_symbols(TCCState *s1)
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add_elf_sym(symtab_section,
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text_section->data_offset, 0,
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE),
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0,
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text_section->sh_num, "_etext");
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add_elf_sym(symtab_section,
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data_section->data_offset, 0,
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE),
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0,
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data_section->sh_num, "_edata");
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add_elf_sym(symtab_section,
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bss_section->data_offset, 0,
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE),
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0,
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bss_section->sh_num, "_end");
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/* horrible new standard ldscript defines */
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add_init_array_defines(s1, ".preinit_array");
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@ -1047,12 +1048,12 @@ static void tcc_add_linker_symbols(TCCState *s1)
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snprintf(buf, sizeof(buf), "__start_%s", s->name);
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add_elf_sym(symtab_section,
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0, 0,
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE),
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0,
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s->sh_num, buf);
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snprintf(buf, sizeof(buf), "__stop_%s", s->name);
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add_elf_sym(symtab_section,
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s->data_offset, 0,
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE),
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0,
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s->sh_num, buf);
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}
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next_sec: ;
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@ -1919,7 +1920,8 @@ static int tcc_load_object_file(TCCState *s1,
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/* add symbol */
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name = strtab + sym->st_name;
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sym_index = add_elf_sym(symtab_section, sym->st_value, sym->st_size,
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sym->st_info, sym->st_shndx, name);
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sym->st_info, sym->st_other,
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sym->st_shndx, name);
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old_to_new_syms[i] = sym_index;
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}
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@ -2093,7 +2095,7 @@ static int tcc_load_dll(TCCState *s1, int fd, const char *filename, int level)
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{
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Elf32_Ehdr ehdr;
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Elf32_Shdr *shdr, *sh, *sh1;
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int i, nb_syms, nb_dts, sym_bind, ret;
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int i, nb_syms, nb_dts, sym_bind, ret, other;
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Elf32_Sym *sym, *dynsym;
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Elf32_Dyn *dt, *dynamic;
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unsigned char *dynstr;
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@ -2173,8 +2175,15 @@ static int tcc_load_dll(TCCState *s1, int fd, const char *filename, int level)
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if (sym_bind == STB_LOCAL)
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continue;
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name = dynstr + sym->st_name;
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#ifdef TCC_TARGET_PE
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/* in the PE format we need to know the DLL from which the
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symbol comes. XXX: add a new array for that ? */
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other = s1->nb_loaded_dlls - 1;
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#else
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other = sym->st_other;
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#endif
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add_elf_sym(s1->dynsymtab_section, sym->st_value, sym->st_size,
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sym->st_info, sym->st_shndx, name);
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sym->st_info, other, sym->st_shndx, name);
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}
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/* load all referenced DLLs */
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53
tccpe.c
53
tccpe.c
@ -414,24 +414,25 @@ void *resolve_sym(struct TCCState *s1, const char *symbol, int type)
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char buffer[100], *p = buffer;
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void *a = NULL;
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int sym_index = pe_find_import(s1, symbol, p);
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int dll_index;
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const char *dll_name;
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void *hm;
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if (sym_index) {
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int dll_index =
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((Elf32_Sym *) s1->dynsymtab_section->data)[sym_index].
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dll_index = ((Elf32_Sym *) s1->dynsymtab_section->data)[sym_index].
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st_other;
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if (dll_index) {
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const char *dll_name = s1->loaded_dlls[dll_index - 1]->name;
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void *hm = GetModuleHandleA(dll_name);
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if (NULL == hm)
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hm = LoadLibraryA(dll_name);
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if (hm) {
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a = GetProcAddress(hm, buffer);
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if (a && STT_OBJECT == type) {
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// need to return a pointer to the address for data objects
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dynarray_add(&pe_imp, &nb_pe_imp, a);
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a = &pe_imp[nb_pe_imp - 1];
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}
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}
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}
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dll_name = s1->loaded_dlls[dll_index]->name;
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hm = GetModuleHandleA(dll_name);
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if (NULL == hm)
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hm = LoadLibraryA(dll_name);
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if (hm) {
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a = GetProcAddress(hm, buffer);
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if (a && STT_OBJECT == type) {
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// need to return a pointer to the address for data objects
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dynarray_add(&pe_imp, &nb_pe_imp, a);
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a = &pe_imp[nb_pe_imp - 1];
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}
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}
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}
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return a;
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}
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@ -642,9 +643,6 @@ ST int pe_add_import(struct pe_info *pe, int sym_index, DWORD offset)
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dll_index =
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((Elf32_Sym *) pe->s1->dynsymtab_section->data)[sym_index].
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st_other;
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if (0 == dll_index)
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return 0;
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i = dynarray_assoc((void **) pe->imp_info, pe->imp_count, dll_index);
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if (-1 != i) {
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p = pe->imp_info[i];
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@ -694,7 +692,7 @@ ST void pe_build_imports(struct pe_info *pe)
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struct pe_import_header *hdr;
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int k, n, v;
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struct pe_import_info *p = pe->imp_info[i];
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const char *name = pe->s1->loaded_dlls[p->dll_index - 1]->name;
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const char *name = pe->s1->loaded_dlls[p->dll_index]->name;
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/* put the dll name into the import header */
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if (0 == strncmp(name, "lib", 3))
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@ -1079,7 +1077,7 @@ int pe_load_def_file(TCCState * s1, FILE * fp)
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{
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DLLReference *dllref;
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int f = 0, sym_index;
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char *p, *p_other, line[120], dllname[40];
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char *p, line[120], dllname[40];
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while (fgets(line, sizeof line, fp)) {
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p = strchr(line, 0);
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while (p > line && p[-1] <= ' ')
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@ -1116,16 +1114,13 @@ int pe_load_def_file(TCCState * s1, FILE * fp)
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++f;
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default:
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/* tccpe needs to know from what dll it should import
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the sym */
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sym_index = add_elf_sym(s1->dynsymtab_section,
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0, 0, ELF32_ST_INFO(STB_GLOBAL,
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STT_FUNC),
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s1->nb_loaded_dlls - 1,
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text_section->sh_num, p);
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/*gr: tccpe needs to know from what dll it should import the sym */
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p_other =
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&((Elf32_Sym *) s1->dynsymtab_section->
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data)[sym_index].st_other;
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if (0 == *p_other)
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*p_other = s1->nb_loaded_dlls;
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continue;
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}
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}
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@ -1151,7 +1146,7 @@ unsigned long pe_add_runtime(TCCState * s1)
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if (start_symbol)
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add_elf_sym(symtab_section,
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0, 0,
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE),
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0,
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SHN_UNDEF, start_symbol);
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if (0 == s1->nostdlib) {
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@ -1171,7 +1166,7 @@ unsigned long pe_add_runtime(TCCState * s1)
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/* for -run GUI's, put '_runwinmain' instead of 'main' */
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add_elf_sym(symtab_section,
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addr, 0,
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE),
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ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0,
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text_section->sh_num, "main");
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/* FreeConsole(); */
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