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feat: 32bit

This commit is contained in:
gbrochar 2024-10-25 12:36:52 +02:00
parent 91510dc86f
commit bf21c93f1f
6 changed files with 292 additions and 8 deletions
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1
Makefile
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@ -5,6 +5,7 @@ SRC_FILES = main.c \
header.c \ header.c \
ident.c \ ident.c \
nm.c \ nm.c \
nm32.c \
fetch.c \ fetch.c \
ft_printf.c \ ft_printf.c \

8
inc/ft_nm.h
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@ -54,11 +54,17 @@ void ft_nm_error(const char *path);
int check_ident(unsigned char ident[EI_NIDENT]); int check_ident(unsigned char ident[EI_NIDENT]);
void *fetch(t_mapped_file mapped_file, size_t offset, size_t fetch_size); void *fetch(t_mapped_file mapped_file, size_t offset, size_t fetch_size);
int nm32(t_mapped_file mapped_file); int nm32(t_mapped_file mapped_file, char *path, t_verbosity verbosity, t_ordering ordering);
int get_header32(t_mapped_file mapped_file, Elf32_Ehdr *header);
int nm64(t_mapped_file mapped_file, char *path, t_verbosity verbosity, t_ordering ordering); int nm64(t_mapped_file mapped_file, char *path, t_verbosity verbosity, t_ordering ordering);
int get_header64(t_mapped_file mapped_file, Elf64_Ehdr *header); int get_header64(t_mapped_file mapped_file, Elf64_Ehdr *header);
int strcmp_nm(void *a, void *b);
int reverse(void *a, void *b);
int nosort(void *a, void *b);
void put_entry(void *data);
char ft_get_hex_digit(char c); char ft_get_hex_digit(char c);
#endif #endif

9
src/header.c
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@ -9,3 +9,12 @@ int get_header64(t_mapped_file mapped_file, Elf64_Ehdr *header) {
return FT_NM_SUCCESS; return FT_NM_SUCCESS;
} }
int get_header32(t_mapped_file mapped_file, Elf32_Ehdr *header) {
void *header_ptr = fetch(mapped_file, 0, 52);
if (!header_ptr) {
return FT_NM_FAILURE;
}
ft_memcpy(header, header_ptr, 52);
return FT_NM_SUCCESS;
}

2
src/main.c
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@ -106,7 +106,7 @@ int nm(char *path, t_verbosity verbosity, t_ordering ordering) {
return 0; return 0;
} }
if (ident[EI_CLASS] == ELFCLASS32) { if (ident[EI_CLASS] == ELFCLASS32) {
if (nm32(mapped_file) == FT_NM_FAILURE) { if (nm32(mapped_file, path, verbosity, ordering) == FT_NM_FAILURE) {
ft_printf("sss", "nm: ", path, ": file format not recognized\n"); ft_printf("sss", "nm: ", path, ": file format not recognized\n");
return 0; return 0;
} }

8
src/nm.c
View File

@ -225,12 +225,13 @@ int nm64(t_mapped_file mapped_file, char *path, t_verbosity verbosity, t_orderin
free(sym_char); free(sym_char);
sym_char = ft_strdup("N"); sym_char = ft_strdup("N");
} }
/*
if (sym_char[0] == 'N') { if (sym_char[0] == 'N') {
ft_putstr(entry->symbol); ft_putstr(entry->symbol);
ft_putchar(*sym_char); ft_putchar(*sym_char);
ft_putchar('\n'); ft_putchar('\n');
print_symbol(sym); print_symbol(sym);
} }*/
// ici le sym char a ete calculer, a partir de la on determine la verbosity // ici le sym char a ete calculer, a partir de la on determine la verbosity
// ici on fait if entry->verbosity >= verbosity, si c'est pas bon on skip toute la suite // ici on fait if entry->verbosity >= verbosity, si c'est pas bon on skip toute la suite
@ -359,11 +360,6 @@ void print_section(Elf64_Shdr sec) {
fflush(stdout); fflush(stdout);
} }
int nm32(t_mapped_file mapped_file) {
(void)mapped_file;
return FT_NM_SUCCESS;
}
void ppp(Elf64_Sym sym, Elf64_Shdr sec) { void ppp(Elf64_Sym sym, Elf64_Shdr sec) {
print_symbol(sym); print_symbol(sym);
print_section(sec); print_section(sec);

272
src/nm32.c Normal file
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@ -0,0 +1,272 @@
#include "ft_nm.h"
char *get_sym_char32(Elf32_Sym sym, Elf32_Shdr sec, int *tool) {
// if ((sec.sh_flags & SHF_COMPRESSED) == SHF_COMPRESSED) {
// return ("N");
// }
*tool = 0;
if (ELF32_ST_TYPE(sym.st_info) == STT_SECTION) {
*tool = 1;
}
if (sym.st_shndx == SHN_ABS) {
if (ELF32_ST_BIND(sym.st_info) == STB_LOCAL) {
return ("a");
}
else if (ELF32_ST_BIND(sym.st_info) == STB_GLOBAL) {
return ("A");
}
}
if (ELF32_ST_BIND(sym.st_info) == STB_GNU_UNIQUE) {
return ("u");
}
if (ELF32_ST_TYPE(sym.st_info) == STT_GNU_IFUNC) {
return ("i");
}
if (sec.sh_flags & SHF_EXECINSTR) {
if (ELF32_ST_BIND(sym.st_info) == STB_LOCAL) {
return ("t");
}
else if (ELF32_ST_BIND(sym.st_info) == STB_GLOBAL) {
return ("T");
}
}
if (sec.sh_type == SHT_NOBITS) {
if (ELF32_ST_BIND(sym.st_info) == STB_LOCAL) {
return ("b");
}
else if (ELF32_ST_BIND(sym.st_info) == STB_GLOBAL) {
return ("B");
}
}
if (sec.sh_type == SHT_PROGBITS && (sec.sh_flags & (SHF_ALLOC | SHF_WRITE)) == (SHF_ALLOC | SHF_WRITE)) {
if (ELF32_ST_BIND(sym.st_info) == STB_LOCAL) {
return ("d");
}
else if (ELF32_ST_BIND(sym.st_info) == STB_GLOBAL) {
return ("D");
}
}
if (sec.sh_type == SHT_DYNAMIC && (sec.sh_flags & (SHF_ALLOC | SHF_WRITE)) == (SHF_ALLOC | SHF_WRITE)) {
if (ELF32_ST_BIND(sym.st_info) == STB_LOCAL) {
return ("d");
}
else if (ELF32_ST_BIND(sym.st_info) == STB_GLOBAL) {
return ("D");
}
}
if (sec.sh_type == SHT_INIT_ARRAY && (sec.sh_flags & (SHF_ALLOC | SHF_WRITE)) == (SHF_ALLOC | SHF_WRITE)) {
if (ELF32_ST_BIND(sym.st_info) == STB_LOCAL) {
return ("d");
}
else if (ELF32_ST_BIND(sym.st_info) == STB_GLOBAL) {
return ("D");
}
}
if (sec.sh_type == SHT_PREINIT_ARRAY && (sec.sh_flags & (SHF_ALLOC | SHF_WRITE)) == (SHF_ALLOC | SHF_WRITE)) {
if (ELF32_ST_BIND(sym.st_info) == STB_LOCAL) {
return ("d");
}
else if (ELF32_ST_BIND(sym.st_info) == STB_GLOBAL) {
return ("D");
}
}
if (sec.sh_type == SHT_FINI_ARRAY && (sec.sh_flags & (SHF_ALLOC | SHF_WRITE)) == (SHF_ALLOC | SHF_WRITE)) {
if (ELF32_ST_BIND(sym.st_info) == STB_LOCAL) {
return ("d");
}
else if (ELF32_ST_BIND(sym.st_info) == STB_GLOBAL) {
return ("D");
}
}
if (/*sec.sh_type == SHT_PROGBITS &&*/ sec.sh_flags & SHF_ALLOC) {
if (ELF32_ST_BIND(sym.st_info) == STB_LOCAL) {
return ("r");
}
else if (ELF32_ST_BIND(sym.st_info) == STB_GLOBAL) {
return ("R");
}
}
if (sec.sh_type == SHT_NOTE && sec.sh_flags == SHF_ALLOC) {
if (ELF32_ST_BIND(sym.st_info) == STB_LOCAL) {
return ("r");
}
else if (ELF32_ST_BIND(sym.st_info) == STB_GLOBAL) {
return ("R");
}
}
if (sym.st_shndx == SHN_COMMON) {
if (ELF32_ST_BIND(sym.st_info) == STB_LOCAL) {
return ("c");
}
else if (ELF32_ST_BIND(sym.st_info) == STB_GLOBAL) {
return ("C");
}
}
if (sym.st_shndx == SHN_UNDEF) {
//return ("U");
if (ELF32_ST_BIND(sym.st_info) == STB_LOCAL) {
return ("u");
}
else if (ELF32_ST_BIND(sym.st_info) == STB_GLOBAL) {
return ("U");
}
}
if (ELF32_ST_BIND(sym.st_info) == STB_WEAK) {
if (ELF32_ST_TYPE(sym.st_info) == STT_OBJECT) {
if (sec.sh_type == SHT_NULL) {
return ("v");
}
else {
return ("V");
}
} else {
if (sec.sh_type == SHT_NULL) {
return ("w");
}
else {
return ("W");
}
}
}
if (ELF32_ST_BIND(sym.st_info) == STB_WEAK) {
if (sec.sh_type == SHT_NULL) {
return ("w");
}
else {
return ("W");
}
}
return ("n");
}
int nm32(t_mapped_file mapped_file, char *path, t_verbosity verbosity, t_ordering ordering) {
t_root *tree = NULL;
t_entry *entry = (t_entry *)malloc(sizeof(t_entry));
int tool;
if (!entry)
return FT_NM_FAILURE;
Elf32_Ehdr header;
if (get_header32(mapped_file, &header) == FT_NM_FAILURE) {
return FT_NM_FAILURE;
}
uint32_t addr = header.e_shoff + header.e_shentsize * header.e_shstrndx;
Elf32_Shdr shstrtb;
shstrtb = *(Elf32_Shdr *)fetch(mapped_file, addr, header.e_shentsize);
for (int i = 0; i < header.e_shnum; i++) {
uint32_t addr = header.e_shoff + header.e_shentsize * i;
Elf32_Shdr sh;
sh = *(Elf32_Shdr *)fetch(mapped_file, addr, header.e_shentsize);
if (sh.sh_type == SHT_SYMTAB) {
uint32_t addr2 = header.e_shoff + header.e_shentsize * sh.sh_link;
Elf32_Shdr strtab;
strtab = *(Elf32_Shdr *)fetch(mapped_file, addr2, header.e_shentsize);
char first = *(char *)fetch(mapped_file, strtab.sh_offset, 1);
char last = *(char *)fetch(mapped_file, strtab.sh_offset + strtab.sh_size - 1, 1);
if (first != '\0' || last != '\0') {
return FT_NM_FAILURE;
}
for (uint64_t j = sh.sh_entsize; j < sh.sh_size; j += sh.sh_entsize) {
Elf32_Sym sym;
Elf32_Shdr sec;
sym = *(Elf32_Sym *)fetch(mapped_file, sh.sh_offset + j, sh.sh_entsize);
if (sym.st_shndx < header.e_shnum) {
sec = *(Elf32_Shdr *)fetch(mapped_file, header.e_shoff + header.e_shentsize * sym.st_shndx, header.e_shentsize);
}
char *str;
char *sec_str;
Elf32_Shdr shdr;
if (sym.st_shndx != SHN_ABS) {
shdr = *(Elf32_Shdr *)fetch(mapped_file, header.e_shoff + header.e_shentsize * sym.st_shndx, header.e_shentsize);
sec_str = ft_strdup(mapped_file.ptr + shstrtb.sh_offset + shdr.sh_name);
} else {
sec_str = ft_strdup("");
}
if (sym.st_name) {
str = ft_strdup(mapped_file.ptr + strtab.sh_offset + sym.st_name);
}
else {
str = sec_str;
}
// ici la str (le symbole) est bon, on la charge dans le truc, ensuite on genere la vrai string a afficher, avant de sort
entry->symbol = ft_strdup(str);
free(str);
char *sym_char = ft_strdup(get_sym_char32(sym, sec, &tool));
//if (entry->symbol[0] == '.' || ft_strnstr(entry->symbol, "lpstub", 6)) {
if (ft_strnstr(entry->symbol, ".debug", 6) && ft_strequ(sym_char, "n")) {
free(sym_char);
sym_char = ft_strdup("N");
}
/*
if (sym_char[0] == 'N') {
ft_putstr(entry->symbol);
ft_putchar(*sym_char);
ft_putchar('\n');
print_symbol(sym);
}*/
// ici le sym char a ete calculer, a partir de la on determine la verbosity
// ici on fait if entry->verbosity >= verbosity, si c'est pas bon on skip toute la suite
entry->verbosity = DEFAULT_VERBOSITY;
if ((sym_char[0] == 'a' && sym.st_info == 4) || sym_char[0] == 'N' || tool == 1)// || entry->symbol[0] == '.')
entry->verbosity = ALL;
if (sym_char[0] == 'u' || sym_char[0] == 'v' || sym_char[0] == 'w' || (sym_char[0] >= 'A' && sym_char[0] <= 'Z' && sym_char[0] != 'N'))
entry->verbosity = GLOBAL;
if (sym_char[0] == 'w' || sym_char[0] == 'U')
entry->verbosity = UNDEFINED;
if (entry->verbosity >= verbosity) {
// ici on genere la string a afficher
// pad ' ' symchar ' ' symbol name \n \0
size_t entry_string_len = 8 + 1 + 1 + 1 + ft_strlen(entry->symbol) + 1 + 1;
entry->string = (char *)malloc(sizeof(char) * entry_string_len);
if (!entry->string)
return FT_NM_FAILURE;
entry->string[entry_string_len - 1] = '\0';
entry->string[entry_string_len - 2] = '\n';
entry->string[8] = ' ';
entry->string[9] = sym_char[0];
entry->string[10] = ' ';
ft_memcpy(entry->string + 11, entry->symbol, ft_strlen(entry->symbol));
if (sym.st_value && !ft_strstr(entry->symbol, "@@")) {
for (char i = 7; i >= 0; i--) {
entry->string[7 - i] = ft_get_hex_digit((sym.st_value >> i * 4) & 0xF);
}
} else {
if (ft_strcmp(sym_char, "U") && ft_strcmp(sym_char, "w") && ft_strcmp(sym_char, "v")) {
for (char i = 7; i >= 0; i--) {
entry->string[7 - i] = ft_get_hex_digit((sym.st_value >> i * 4) & 0xF);
}
} else {
for (int i = 0; i < 8; i++)
entry->string[i] = ' ';
}
}
free(sym_char);
// ensuite un switch ordering avec un ft_lstinsert (pointeur sur fonction serait plus opti mais osef)
switch (ordering) {
case NOSORT:
ft_rbt_insert(&tree, ft_rbt_new((void *)entry, sizeof(t_entry)), &nosort);
break;
case REVERSE:
ft_rbt_insert(&tree, ft_rbt_new((void *)entry, sizeof(t_entry)), &reverse);
break;
case DEFAULT_ORDERING:
ft_rbt_insert(&tree, ft_rbt_new((void *)entry, sizeof(t_entry)), &strcmp_nm);
break;
}
// pas de bst oops :D
fflush(stdout);
}
}
}
char *str = ft_strdup(mapped_file.ptr + shstrtb.sh_offset + sh.sh_name);
free(str);
}
// ici on affiche tout ou no symbols en cas de list vide
if (tree) {
ft_putrbt(tree, &put_entry);
} else {
ft_printf("sss", "nm: ", path, ": no symbols\n");
}
return FT_NM_SUCCESS;
}