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otool 64 and 32 bit output

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This commit is contained in:
Gregory 2019-08-17 15:21:56 +03:00
parent e125f85672
commit 544f01f380
6 changed files with 132 additions and 42 deletions
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10
inc/ft_nm.h
View file

@ -6,7 +6,7 @@
/* By: gtertysh <gtertysh@student.unit.ua> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/05/06 22:37:16 by foton #+# #+# */
/* Updated: 2019/08/10 17:18:31 by gtertysh ### ########.fr */
/* Updated: 2019/08/17 14:26:16 by gtertysh ### ########.fr */
/* */
/* ************************************************************************** */
@ -82,12 +82,8 @@ t_symtab_command *find_symbol_table_command
void print_addr
(
size_t addr
);
void print_addr_32
(
size_t addr
size_t addr,
size_t count
);
#endif

1
meson.build
View file

@ -40,6 +40,7 @@ nm_sources = [
otool_sources = [
'src/nm/nm_file.c',
'src/nm/print_address.c',
'src/otool/main.c'
]

2
src/nm/macho32.c
View file

@ -62,7 +62,7 @@ static void print_symbol_table(t_nm_mach_32 *mach32)
// some shit herustic should be used
// to determine to print address or not
if (symbol.n_value)
print_addr_32(symbol.n_value);
print_addr(symbol.n_value, 8);
else
ft_putstr(" ");
ft_putchar(' ');

2
src/nm/macho64.c
View file

@ -62,7 +62,7 @@ static void print_symbol_table(t_nm_mach_64 *mach64)
// some shit herustic should be used
// to determine to print address or not
if (symbol.n_value)
print_addr(symbol.n_value);
print_addr(symbol.n_value, 16);
else
ft_putstr(" ");
ft_putchar(' ');

23
src/nm/print_address.c
View file

@ -2,32 +2,11 @@
#include "libft.h"
#include <stddef.h>
void print_addr(size_t addr)
void print_addr(size_t addr, size_t count)
{
size_t i;
size_t bit_4;
size_t count;
count = sizeof(size_t) * 2;
i = 0;
while (i < count)
{
bit_4 = (addr >> ((count - i - 1) * 4)) & 0xf;
if (bit_4 < 10)
ft_putnbr(bit_4);
else
ft_putchar('a' + bit_4 - 10);
i++;
}
}
void print_addr_32(size_t addr)
{
size_t i;
size_t bit_4;
size_t count;
count = sizeof(size_t);
i = 0;
while (i < count)
{

136
src/otool/main.c
View file

@ -18,7 +18,7 @@ t_segment_command_64 *find_text_command_64
i = 0;
while(i < count)
{
if (lc->cmd == LC_SEGMENT_64 &&
if (lc->cmd == LC_SEGMENT_64 &&
ft_strcmp(((t_segment_command_64 *)lc)->segname, SEG_TEXT) == 0)
{
text_command = (t_segment_command_64 *)lc;
@ -30,6 +30,31 @@ t_segment_command_64 *find_text_command_64
return text_command;
}
t_segment_command_32 *find_text_command_32
(
t_load_command *lc,
uint32_t count
)
{
uint32_t i;
t_segment_command_32 *text_command;
text_command = NULL;
i = 0;
while(i < count)
{
if (lc->cmd == LC_SEGMENT &&
ft_strcmp(((t_segment_command_32 *)lc)->segname, SEG_TEXT) == 0)
{
text_command = (t_segment_command_32 *)lc;
break;
}
lc = (t_load_command *)((uintptr_t)lc + lc->cmdsize);
i++;
}
return text_command;
}
t_section_64 *find_text_section_64
(
t_segment_command_64 *text_segment
@ -41,7 +66,7 @@ t_section_64 *find_text_section_64
i = 0;
text_section = NULL;
runner = (t_section_64 *)((uintptr_t)text_segment +
runner = (t_section_64 *)((uintptr_t)text_segment +
sizeof(t_segment_command_64));
while(i < text_segment->nsects)
@ -57,15 +82,91 @@ t_section_64 *find_text_section_64
return (text_section);
}
void print_text_64
t_section_32 *find_text_section_32
(
t_nm_mach_64 *mach64
t_segment_command_32 *text_segment
)
{
ft_putstr(mach64->text_section->sectname);
ft_putstr("\n section size: ");
ft_putnbr(mach64->text_section->size);
ft_putstr("\n");
uint32_t i;
t_section_32 *text_section;
t_section_32 *runner;
i = 0;
text_section = NULL;
runner = (t_section_32 *)((uintptr_t)text_segment +
sizeof(t_segment_command_32));
while(i < text_segment->nsects)
{
if (ft_strcmp(runner->sectname, SECT_TEXT) == 0)
{
text_section = runner;
break;
}
runner = (t_section_32 *)((uintptr_t)runner + sizeof(t_section_32));
i++;
}
return (text_section);
}
void print_text_64
(
t_nm_mach_64 *mach64,
t_file *file
)
{
size_t text;
size_t addr;
uint64_t i;
uint64_t j;
text = (size_t)file->file + mach64->text_section->offset;
addr = mach64->text_section->addr;
i = 0;
while(i < mach64->text_section->size)
{
print_addr(addr + i, 16);
ft_putstr("\t");
j = 0;
while(i < mach64->text_section->size && j < 16)
{
print_addr(*(char *)(text + i), 2);
ft_putstr(" ");
j++;
i++;
}
ft_putstr("\n");
}
}
void print_text_32
(
t_nm_mach_32 *mach32,
t_file *file
)
{
size_t text;
size_t addr;
uint64_t i;
uint64_t j;
text = (size_t)file->file + mach32->text_section->offset;
addr = mach32->text_section->addr;
i = 0;
while(i < mach32->text_section->size)
{
print_addr(addr + i, 8);
ft_putstr("\t");
j = 0;
while(i < mach32->text_section->size && j < 8)
{
print_addr(*(char *)(text + i), 2);
ft_putstr(" ");
j++;
i++;
}
ft_putstr("\n");
}
}
void otool64(t_file *file)
@ -77,7 +178,19 @@ void otool64(t_file *file)
mach64.text_command = find_text_command_64(mach64.commands,
mach64.header->ncmds);
mach64.text_section = find_text_section_64(mach64.text_command);
print_text_64(&mach64);
print_text_64(&mach64, file);
}
void otool32(t_file *file)
{
t_nm_mach_32 mach32;
mach32.header = (t_mach_header_32 *)file->file;
mach32.commands = (t_load_command *)(file->file + sizeof(t_mach_header_32));
mach32.text_command = find_text_command_32(mach32.commands,
mach32.header->ncmds);
mach32.text_section = find_text_section_32(mach32.text_command);
print_text_32(&mach32, file);
}
void hanldle_file(const char *filename)
@ -91,8 +204,8 @@ void hanldle_file(const char *filename)
magic = *(uint32_t *)file.file;
if (magic == MH_MAGIC_64)
otool64(&file);
// else if (magic == MH_MAGIC)
// macho32(&file);
else if (magic == MH_MAGIC)
otool32(&file);
// else if (magic == FAT_CIGAM)
// fat(&file);
// else if (ft_strncmp(file.file, ARMAG, SARMAG) == 0)
@ -117,6 +230,7 @@ int main(int argc, char **argv)
{
ft_putstr(argv[i]);
ft_putstr(":\n");
ft_putstr("Contents of (__TEXT,__text) section\n");
hanldle_file(argv[i]);
i++;
}