wip: elf64
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65a9713d15
commit
f0936e0d52
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@ -24,7 +24,7 @@ int main(int ac, char **av) {
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t_mapped_file mapped_file;
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ft_printf("sds", "file size: ", stat.st_size, "\n");
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// ft_printf("sds", "file size: ", stat.st_size, "\n");
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mapped_file.ptr = mmap(NULL, stat.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
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mapped_file.size = stat.st_size;
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if (mapped_file.ptr != MAP_FAILED) {
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228
src/nm.c
228
src/nm.c
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@ -1,11 +1,14 @@
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#include "ft_nm.h"
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int nm32(t_mapped_file mapped_file) {
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(void)mapped_file;
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return FT_NM_SUCCESS;
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}
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void ppp(Elf64_Sym sym, Elf64_Shdr sec);
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void print_section(Elf64_Shdr sec);
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void print_symbol(Elf64_Sym sym);
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char *get_sym_char(Elf64_Sym sym) {
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char *get_sym_char(Elf64_Sym sym, Elf64_Shdr sec) {
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// ppp(sym, sec);
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if ((sec.sh_flags & SHF_COMPRESSED) == SHF_COMPRESSED) {
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return ("N");
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}
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if (sym.st_shndx == SHN_ABS) {
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if (ELF64_ST_BIND(sym.st_info) == STB_LOCAL) {
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return ("a");
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@ -14,15 +17,135 @@ char *get_sym_char(Elf64_Sym sym) {
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return ("A");
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}
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}
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if (ELF64_ST_TYPE(sym.st_info) == STT_GNU_IFUNC) {
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return ("i");
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}
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if (sec.sh_flags & SHF_EXECINSTR) {
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if (ELF64_ST_BIND(sym.st_info) == STB_LOCAL) {
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return ("t");
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}
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else if (ELF64_ST_BIND(sym.st_info) == STB_GLOBAL) {
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return ("T");
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}
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}
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if (sec.sh_type == SHT_NOBITS) {
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if (ELF64_ST_BIND(sym.st_info) == STB_LOCAL) {
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return ("b");
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}
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else if (ELF64_ST_BIND(sym.st_info) == STB_GLOBAL) {
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return ("B");
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}
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}
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if (sec.sh_type == SHT_PROGBITS && (sec.sh_flags & (SHF_ALLOC | SHF_WRITE)) == (SHF_ALLOC | SHF_WRITE)) {
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if (ELF64_ST_BIND(sym.st_info) == STB_LOCAL) {
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return ("d");
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}
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else if (ELF64_ST_BIND(sym.st_info) == STB_GLOBAL) {
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return ("D");
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}
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}
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if (sec.sh_type == SHT_DYNAMIC && (sec.sh_flags & (SHF_ALLOC | SHF_WRITE)) == (SHF_ALLOC | SHF_WRITE)) {
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if (ELF64_ST_BIND(sym.st_info) == STB_LOCAL) {
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return ("d");
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}
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else if (ELF64_ST_BIND(sym.st_info) == STB_GLOBAL) {
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return ("D");
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}
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}
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if (sec.sh_type == SHT_INIT_ARRAY && (sec.sh_flags & (SHF_ALLOC | SHF_WRITE)) == (SHF_ALLOC | SHF_WRITE)) {
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if (ELF64_ST_BIND(sym.st_info) == STB_LOCAL) {
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return ("d");
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}
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else if (ELF64_ST_BIND(sym.st_info) == STB_GLOBAL) {
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return ("D");
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}
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}
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if (sec.sh_type == SHT_PREINIT_ARRAY && (sec.sh_flags & (SHF_ALLOC | SHF_WRITE)) == (SHF_ALLOC | SHF_WRITE)) {
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if (ELF64_ST_BIND(sym.st_info) == STB_LOCAL) {
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return ("d");
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}
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else if (ELF64_ST_BIND(sym.st_info) == STB_GLOBAL) {
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return ("D");
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}
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}
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if (sec.sh_type == SHT_FINI_ARRAY && (sec.sh_flags & (SHF_ALLOC | SHF_WRITE)) == (SHF_ALLOC | SHF_WRITE)) {
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if (ELF64_ST_BIND(sym.st_info) == STB_LOCAL) {
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return ("d");
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}
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else if (ELF64_ST_BIND(sym.st_info) == STB_GLOBAL) {
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return ("D");
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}
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}
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if (/*sec.sh_type == SHT_PROGBITS &&*/ sec.sh_flags & SHF_ALLOC) {
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if (ELF64_ST_BIND(sym.st_info) == STB_LOCAL) {
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return ("r");
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}
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else if (ELF64_ST_BIND(sym.st_info) == STB_GLOBAL) {
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return ("R");
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}
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}
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if (sec.sh_type == SHT_NOTE && sec.sh_flags == SHF_ALLOC) {
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if (ELF64_ST_BIND(sym.st_info) == STB_LOCAL) {
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return ("r");
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}
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else if (ELF64_ST_BIND(sym.st_info) == STB_GLOBAL) {
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return ("R");
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}
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}
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if (sym.st_shndx == SHN_COMMON) {
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if (ELF64_ST_BIND(sym.st_info) == STB_LOCAL) {
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return ("c");
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}
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else if (ELF64_ST_BIND(sym.st_info) == STB_GLOBAL) {
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return ("C");
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}
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}
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if (sym.st_shndx == SHN_UNDEF) {
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if (ELF64_ST_BIND(sym.st_info) == STB_LOCAL) {
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return ("u");
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}
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else if (ELF64_ST_BIND(sym.st_info) == STB_GLOBAL) {
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return ("U");
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}
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}
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if (ELF64_ST_BIND(sym.st_info) == STB_WEAK) {
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if (ELF64_ST_TYPE(sym.st_info) == STT_OBJECT) {
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if (sec.sh_type == SHT_NULL) {
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return ("v");
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}
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else {
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return ("V");
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}
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} else {
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if (sec.sh_type == SHT_NULL) {
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return ("w");
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}
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else {
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return ("W");
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}
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}
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}
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if (ELF64_ST_BIND(sym.st_info) == STB_WEAK) {
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if (sec.sh_type == SHT_NULL) {
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return ("w");
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}
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else {
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print_symbol(sym);
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print_section(sec);
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return ("W");
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}
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}
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// if section name starts with .debug....
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// return ("N");
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return ("n");
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}
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int nm64(t_mapped_file mapped_file) {
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Elf64_Ehdr header;
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if (get_header64(mapped_file, &header) == FT_NM_FAILURE) {
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return FT_NM_FAILURE;
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}
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printf("Header:\n");
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/* printf("Header:\n");
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printf("Version: %d\n", header.e_version);
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printf("Entry point: %ld\n", header.e_entry);
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printf("Program header offset: ");
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@ -39,6 +162,7 @@ int nm64(t_mapped_file mapped_file) {
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printf("Section header entry size: %d\n", header.e_shentsize);
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printf("Section header num: %d\n", header.e_shnum);
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printf("Section header string table index: %d\n", header.e_shstrndx);
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*/
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/*
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for (int i = 0; i < header.e_phnum; i++) {
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uint64_t addr = header.e_phoff + header.e_phentsize * i;
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@ -64,24 +188,50 @@ int nm64(t_mapped_file mapped_file) {
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uint64_t addr2 = header.e_shoff + header.e_shentsize * sh.sh_link;
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Elf64_Shdr strtab;
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ft_memcpy(&strtab, mapped_file.ptr + addr2, header.e_shentsize);
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ft_printf("sdsds", "SYMTAB Size: ", sh.sh_size, " Entity size: ", sh.sh_entsize, "\n");
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for (uint64_t j = 0; j < sh.sh_size; j += sh.sh_entsize) {
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// ft_printf("sdsds", "SYMTAB Size: ", sh.sh_size, " Entity size: ", sh.sh_entsize, "\n");
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for (uint64_t j = sh.sh_entsize; j < sh.sh_size; j += sh.sh_entsize) {
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Elf64_Sym sym;
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Elf64_Shdr sec;
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ft_memcpy(&sym, mapped_file.ptr + sh.sh_offset + j, sh.sh_entsize);
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char *str = ft_strdup(mapped_file.ptr + strtab.sh_offset + sym.st_name);
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//if (str[ft_strlen(str) - 1] == 'c') {
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printf("st_name: %d\n", sym.st_name);
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printf("st_info: %d\n", sym.st_info);
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printf("st_other: %d\n", sym.st_other);
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printf("st_shndx: %d\n", sym.st_shndx);
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printf("st_value: %ld\n", sym.st_value);
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printf("st_size: %ld\n", sym.st_size);
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//}
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if (sym.st_value) {
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ft_printf("X s ss", sym.st_value, get_sym_char(sym), str, "\n");
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} else {
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ft_printf("P s ss", get_sym_char(sym), mapped_file.ptr + strtab.sh_offset + sym.st_name, "\n");
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// printf("st_shndx: %d\n", sym.st_shndx);
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if (sym.st_shndx < header.e_shnum) {
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ft_memcpy(&sec, mapped_file.ptr + header.e_shoff + header.e_shentsize * sym.st_shndx, header.e_shentsize);
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}
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char *str;
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if (sym.st_name) {
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str = ft_strdup(mapped_file.ptr + strtab.sh_offset + sym.st_name);
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}
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else {
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//printf("good\n");
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Elf64_Shdr shdr;
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//print_symbol(sym);
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if (sym.st_shndx != SHN_ABS) {
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ft_memcpy(&shdr, mapped_file.ptr + header.e_shoff + header.e_shentsize * sym.st_shndx, header.e_shentsize);
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//print_section(shdr);
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//ft_printf("sxs", "sh string table ", shstrtb.sh_offset, "\n");
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str = ft_strdup(mapped_file.ptr + shstrtb.sh_offset + shdr.sh_name);
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//str = ft_strdup("TOTOTOTOTO");
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//str = ft_strdup(mapped_file.ptr + shdr.sh_offset + sec.sh_name);
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} else {
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str = ft_strdup("");
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}
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}
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//if (str[ft_strlen(str) - 1] == 'c') {
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/*
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*/
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//}
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char *sym_char = ft_strdup(get_sym_char(sym, sec));
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if (sym.st_value) {
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ft_printf("X s ss", sym.st_value, sym_char, str, "\n");
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} else {
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if (ft_strcmp(sym_char, "U") && ft_strcmp(sym_char, "w") && ft_strcmp(sym_char, "v")) {
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ft_printf("X s ss", sym.st_value, sym_char, str, "\n");
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} else {
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//ft_printf("P s ss", sym_char, mapped_file.ptr + strtab.sh_offset + sym.st_name, "\n");
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ft_printf("P s ss", sym_char, str, "\n");
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}
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}
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fflush(stdout);
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}
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}
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/*ft_printf("X", sh.sh_offset);
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@ -90,10 +240,44 @@ int nm64(t_mapped_file mapped_file) {
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ft_putchar('\n');*/
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char *str = ft_strdup(mapped_file.ptr + shstrtb.sh_offset + sh.sh_name);
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//ft_putstr(str);
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ft_printf("x x x ss", sh.sh_name, sh.sh_offset, addr, str, "\n");
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// ft_printf("x x x ss", sh.sh_name, sh.sh_offset, addr, str, "\n");
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free(str);
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//ft_putchar('\n');
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}
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return FT_NM_SUCCESS;
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}
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void print_symbol(Elf64_Sym sym) {
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printf("st_name: %d\n", sym.st_name);
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printf("st_info: %d\n", sym.st_info);
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printf("st_other: %d\n", sym.st_other);
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printf("st_shndx: %d\n", sym.st_shndx);
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// printf("st_value: %ld\n", sym.st_value);
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// printf("st_size: %ld\n", sym.st_size);
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fflush(stdout);
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}
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void print_section(Elf64_Shdr sec) {
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printf("sh_name : %d\n", sec.sh_name);
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printf("sh_type : %d\n", sec.sh_type);
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printf("sh_flags : %ld\n", sec.sh_flags);
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// printf("sh_addr : %ld\n", sec.sh_addr);
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// printf("sh_offset : %ld\n", sec.sh_offset);
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// printf("sh_size : %ld\n", sec.sh_size);
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printf("sh_link : %d\n", sec.sh_link);
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printf("sh_info : %d\n", sec.sh_info);
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// printf("sh_addralign : %ld\n", sec.sh_addralign);
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// printf("sh_entsize : %ld\n", sec.sh_entsize);
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fflush(stdout);
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}
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int nm32(t_mapped_file mapped_file) {
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(void)mapped_file;
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return FT_NM_SUCCESS;
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}
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void ppp(Elf64_Sym sym, Elf64_Shdr sec) {
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print_symbol(sym);
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print_section(sec);
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}
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