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debut de nm d'apres la video de l'intra

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Jack Halford 2017-02-19 03:56:59 +01:00
commit d6732360a1
7 changed files with 217 additions and 0 deletions
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3
nm-otool/.gitmodules vendored Normal file
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[submodule "libft"]
path = libft
url = https://github.com/jzck/libft

84
nm-otool/Makefile Normal file
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# **************************************************************************** #
# #
# ::: :::::::: #
# Makefile :+: :+: :+: #
# +:+ +:+ +:+ #
# By: jhalford <jack@crans.org> +#+ +:+ +#+ #
# +#+#+#+#+#+ +#+ #
# Created: 2017/02/19 03:29:38 by jhalford #+# #+# #
# Updated: 2017/02/19 03:56:22 by jhalford ### ########.fr #
# #
# **************************************************************************** #
NAME = ft_nm
CC = gcc
MKDIR = mkdir -p
RM = /bin/rm -rf
W_FLAGS = -Wall -Wextra -Werror
D_FLAGS =
V_FLAGS = -fvisibility=hidden
FLAGS = $(W_FLAGS) $(D_FLAGS) $(V_FLAGS)
DELTA = $$(echo "$$(tput cols)-47"|bc)
LIBFT_DIR = libft/
LIBFT_LIB = $(LIBFT_DIR)libft.a
LIBFT_INC = $(LIBFT_DIR)includes/
SRC_DIR = src/
INC_DIR = includes/
OBJ_DIR = objs/
SRC_BASE = \
ft_nm.c
SRCS = $(addprefix $(SRC_DIR), $(SRC_BASE))
OBJS = $(addprefix $(OBJ_DIR), $(SRC_BASE:.c=.o))
NB = $(words $(SRC_BASE))
INDEX = 0
all:
@make -j $(NAME)
$(NAME): $(OBJ_DIR) $(OBJS)
@$(CC) $(FLAGS) $(D_FLAGS) \
-I $(INC_DIR) \
-I $(LIBFT_INC) \
$(LIBS) \
$(LIBFT_LIB) $(OBJS) \
-o $(NAME)
@$(eval INDEX=$(shell echo $$(($(INDEX)+1))))
@strip -x $(NAME)
@printf "\r\e[48;5;15;38;5;25m✅ MAKE $(NAME)\e[0m\e[K\n"
$(OBJ_DIR)%.o: $(SRC_DIR)%.c | $(OBJ_DIR)
@$(eval DONE=$(shell echo $$(($(INDEX)*20/$(NB)))))
@$(eval PERCENT=$(shell echo $$(($(INDEX)*100/$(NB)))))
@$(eval COLOR=$(shell echo $$(($(PERCENT)%35+196))))
@$(eval TO_DO=$(shell echo $$((20-$(INDEX)*20/$(NB)))))
@printf "\r\e[38;5;11m⌛ MAKE %10.10s : %2d%% \e[48;5;%dm%*s\e[0m%*s\e[48;5;255m \e[0m \e[38;5;11m %*s\e[0m\e[K" $(NAME) $(PERCENT) $(COLOR) $(DONE) "" $(TO_DO) "" $(DELTA) "$@"
@$(CC) $(FLAGS) -MMD -c $< -o $@\
-I $(INC_DIR) \
-I $(LIBFT_INC)
@$(eval INDEX=$(shell echo $$(($(INDEX)+1))))
$(OBJ_DIR):
@$(MKDIR) $(OBJ_DIR)
@$(MKDIR) $(dir $(OBJS))
clean:
@$(RM) $(OBJ_DIR)
@printf "\r\e[38;5;202m✖ clean $(NAME).\e[0m\e[K\n"
fclean: clean
@$(RM) $(NAME)
@printf "\r\e[38;5;196m❌ fclean $(NAME).\e[0m\e[K\n"
re: fclean all
.PHONY: all clean fclean re
-include $(OBJS:.o=.d)

BIN
nm-otool/ft_nm Executable file
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25
nm-otool/includes/ft_nm.h Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_nm.h :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: jhalford <jack@crans.org> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2017/02/19 03:09:10 by jhalford #+# #+# */
/* Updated: 2017/02/19 03:32:51 by jhalford ### ########.fr */
/* */
/* ************************************************************************** */
#ifndef FT_NM_H
# define FT_NM_H
# include "libft.h"
# include <stdio.h>
# include <sys/mman.h>
# include <mach-o/loader.h>
# include <mach-o/nlist.h>
# include <fcntl.h>
# include <sys/stat.h>
# include <stdlib.h>
#endif

1
nm-otool/libft Submodule

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Subproject commit 0ca8ca817f32fc0345ef93ef74a3abe2583bd89c

87
nm-otool/src/ft_nm.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_nm.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: jhalford <jack@crans.org> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2017/02/19 03:09:12 by jhalford #+# #+# */
/* Updated: 2017/02/19 03:56:34 by jhalford ### ########.fr */
/* */
/* ************************************************************************** */
#include "ft_nm.h"
void print_output(int nsyms, int symoff, int stroff, void *ptr)
{
int i;
char *stringtable;
struct nlist_64 *array;
array = ptr + symoff;
stringtable = (void*)ptr + stroff;
for (i = 0; i < nsyms; ++i)
{
ft_printf("%s\n", stringtable + array[i].n_un.n_strx);
}
}
void handle_64(void *ptr)
{
int ncmds;
int i;
struct mach_header_64 *header;
struct load_command *lc;
struct symtab_command *sym;
header = (struct mach_header_64*)ptr;
ncmds = header->ncmds;
lc = ptr + sizeof(*header);
for (i = 0; i < ncmds; i++)
{
if (lc->cmd == LC_SYMTAB)
{
sym = (struct symtab_command*)lc;
/* ft_printf("nb symbols: %d\n", sym->nsyms); */
print_output(sym->nsyms, sym->symoff, sym->stroff, ptr);
break ;
}
lc = (void*)lc + lc->cmdsize;
}
}
void nm(char *ptr)
{
unsigned int magic_number;
magic_number = *(int *)ptr;
if (magic_number == MH_MAGIC_64)
{
/* ft_printf("je suis un binaire 64 bits\n"); */
handle_64(ptr);
}
}
int main(int ac, char **av)
{
int fd;
char *ptr;
struct stat buf;
if (ac != 2)
{
ft_dprintf(2, "Please give me an arg\n");
return (1);
}
if ((fd = open(av[1], O_RDONLY)) < 0)
return (1);
if ((fstat(fd, &buf)) < 0)
return (1);
if ((ptr = mmap(NULL, buf.st_size, PROT_READ, MAP_PRIVATE, fd, 0))
== MAP_FAILED)
return (1);
nm(ptr);
if (munmap(ptr, buf.st_size))
return (1);
return (0);
}

17
nm-otool/update_makefile.sh Executable file
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MYPATH=$(pwd)
CUR_MAKEFILE=$MYPATH/Makefile
if [ -e $CUR_MAKEFILE ]
then
echo "regenerate Makefile"
sed "`grep -n 'SRC_BASE =' $CUR_MAKEFILE | sed 's/:.*//'`, \$d" $CUR_MAKEFILE > NEWMAKEFILE
grep 'SRC_BASE =' $CUR_MAKEFILE >> NEWMAKEFILE
expr "$(find ./src | grep "\.c" | sed -e 's/src\///' -e 's/\.\///' -e 's/$/\\/')" : "\(.*\).$" >> NEWMAKEFILE
echo "" >> NEWMAKEFILE
grep 'SRCS =' $CUR_MAKEFILE >> NEWMAKEFILE
sed "1, `grep -n 'SRCS =' $CUR_MAKEFILE | sed 's/:.*//'`d" $CUR_MAKEFILE >> NEWMAKEFILE
mv $CUR_MAKEFILE ~/Documents/.OLDMakefile
mv NEWMAKEFILE $CUR_MAKEFILE
echo "Makefile done (copy still alive in ~/Documents/.OLDMakefile)"
else
echo "Makefile not found."
fi