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debug st_info

This commit is contained in:
gbrochar 2024-10-21 17:13:46 +02:00
parent 3bbb476505
commit 91510dc86f
3 changed files with 69 additions and 6 deletions
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3
.gitignore vendored
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@ -1,5 +1,8 @@
# ft_nm
out.all
ft_nm
a
b
# libft
inc/libft.h

62
src/nm.c
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@ -4,10 +4,14 @@ void ppp(Elf64_Sym sym, Elf64_Shdr sec);
void print_section(Elf64_Shdr sec);
void print_symbol(Elf64_Sym sym);
char *get_sym_char(Elf64_Sym sym, Elf64_Shdr sec) {
char *get_sym_char(Elf64_Sym sym, Elf64_Shdr sec, int *tool) {
// if ((sec.sh_flags & SHF_COMPRESSED) == SHF_COMPRESSED) {
// return ("N");
// }
*tool = 0;
if (ELF64_ST_TYPE(sym.st_info) == STT_SECTION) {
*tool = 1;
}
if (sym.st_shndx == SHN_ABS) {
if (ELF64_ST_BIND(sym.st_info) == STB_LOCAL) {
return ("a");
@ -166,6 +170,7 @@ void put_entry(void *data) {
int nm64(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;
Elf64_Ehdr header;
@ -213,17 +218,26 @@ int nm64(t_mapped_file mapped_file, char *path, t_verbosity verbosity, t_orderin
// 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_char(sym, sec));
if (ft_strnstr(sec_str, ".debug", 6) && ft_strequ(sym_char, "n")) {
char *sym_char = ft_strdup(get_sym_char(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')
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'))
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;
@ -240,7 +254,7 @@ int nm64(t_mapped_file mapped_file, char *path, t_verbosity verbosity, t_orderin
entry->string[17] = sym_char[0];
entry->string[18] = ' ';
ft_memcpy(entry->string + 19, entry->symbol, ft_strlen(entry->symbol));
if (sym.st_value) {
if (sym.st_value && !ft_strstr(entry->symbol, "@@")) {
for (char i = 15; i >= 0; i--) {
entry->string[15 - i] = ft_get_hex_digit((sym.st_value >> i * 4) & 0xF);
}
@ -285,9 +299,45 @@ int nm64(t_mapped_file mapped_file, char *path, t_verbosity verbosity, t_orderin
return FT_NM_SUCCESS;
}
void print_st_info(unsigned char st_info) {
unsigned char type = ELF64_ST_TYPE(st_info);
unsigned char bind = ELF64_ST_BIND(st_info);
if (type == STT_NOTYPE) {
ft_putstr("symbol has no type (STT_NOTYPE)\n");
} else if (type == STT_OBJECT) {
ft_putstr("symbol has object type (STT_OBJECT)\n");
} else if (type == STT_FUNC) {
ft_putstr("symbol has func type (STT_FUNC)\n");
} else if (type == STT_SECTION) {
ft_putstr("symbol has section type (STT_SECTION)\n");
} else if (type == STT_FILE) {
ft_putstr("symbol has file type (STT_FILE)\n");
} else if (type >= STT_LOPROC && type <= STT_HIPROC) {
ft_putnbr(type);
ft_putstr(" reserved for processor-specific semantics (STT_LOPROC <= type <= STT_HIPROC)\n");
} else {
ft_putstr("symbol TYPE unknown (warning: no matching STT_****)\n");
}
if (bind == STB_LOCAL) {
ft_putstr("symbol has local bind (STB_LOCAL)\n");
} else if (bind == STB_GLOBAL) {
ft_putstr("symbol has global bind (STB_GLOBAL)\n");
} else if (bind == STB_WEAK) {
ft_putstr("symbol has weak bind (STB_WEAK)\n");
} else if (bind >= STB_LOPROC && bind <= STB_HIPROC) {
ft_putnbr(bind);
ft_putstr(" reserved for processor-specific semantics (STB_LOPROC <= bind <= STB_HIPROC)\n");
} else {
ft_putstr("symbol BIND unknown (warning: no matching STB_****)\n");
}
}
void print_symbol(Elf64_Sym sym) {
printf("st_name: %d\n", sym.st_name);
printf("st_info: %d\n", sym.st_info);
print_st_info(sym.st_info);
printf("st_other: %d\n", sym.st_other);
printf("st_shndx: %d\n", sym.st_shndx);
// printf("st_value: %ld\n", sym.st_value);

10
unit_test.sh Executable file
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@ -0,0 +1,10 @@
#!/bin/bash
for file in $1*/**/*
do
if [[ "$file" != *.a ]] ;then
echo $file
./ft_nm $2 $file 2>&1 | cat > a
nm $2 $file 2>&1 | cat > b
diff a b
fi
done