Unam3dd

#include <stdio.h>

int	ft_atoi(char *str)
{
	long long			to_dec = 0;
	int				neg = 1;

	while (!(*str ^ ' ') || (*str >= '\t' && *str <= '\r'))
		str = (char *)-~(unsigned long long)str; // Wtff dude
	while ((!(*str ^ '+') || !(*str ^ '-')))

lancejpollard

Mike's x86-64 Assembly (ASM) Notes

Assembling Binary Machine Code

Operating Modes:

These determine the assumed/default size of instruction operands, and restricts which opcodes are available, and how they are used.

Modern operating systems, booted inside Real mode,

colematt

Adding Sections to ELF Binaries

Suppose you need to add a section to an ELF binary to contain information gathered at compile time, but to be used at link time or run time. Here's how to add a section named .okdata and either populate it with data either after or before emitting the ELF binary.

Adding a Section After Emitting

In this case, you'll add file’s contents to an already existing binary. objcopy copies and translates object files, such that adding a new section is a matter of writing that new section’s contents into the ELF file.

(Optional) Create a simple program’s object file.

DhavalKapil

ELF

ELF Header

The first portion of any ELF file is the ELF header. This generally provides offsets to other headers (program headers and section headers) within an ELF.

typedef struct {
  unsigned char e_ident[EI_NIDENT];
 uint16_t e_type;

baoilleach

> set PATH=C:\MinGW\bin;%PATH%

C:\Tools\zlib\zlib-1.2.8> C:\MinGW\bin\mingw32-make.exe -fwin32/Makefile.gcc
gcc  -O3 -Wall -c -o adler32.o adler32.c
gcc  -O3 -Wall -c -o compress.o compress.c
gcc  -O3 -Wall -c -o crc32.o crc32.c
gcc  -O3 -Wall -c -o deflate.o deflate.c
gcc  -O3 -Wall -c -o gzclose.o gzclose.c
gcc  -O3 -Wall -c -o gzlib.o gzlib.c
gcc  -O3 -Wall -c -o gzread.o gzread.c