R077A6r1an R077A6r1an
R077A6r1an
/ Makefile
Created
October 10, 2023 14:27
This snippet demonstrates, how to hack the return address, where a x86_64 CPU will continue executing after the main() function in this exsample. For understanding this snippet, you should be familiar with basic concepts of x64 assembler and the stack. #hacking #cracking
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| all: | |
| gcc -o StackOverflow overflow.c -fno-stack-protector | |
| exec: all | |
| ./StackOverflow | |
| clean: | |
| rm StackOverflow | |
| .PHONY: all |
R077A6r1an
/ Kernel.c
Last active
August 13, 2023 00:13
A tutorial for a minimal x86_32 operating system kernel #kernel #osdev #tutorial
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| // First, a minimal stdint.h | |
| typedef __UINT32_TYPE__ uint32_t; | |
| typedef __UINT64_TYPE__ uint64_t; | |
| // NOTE: as kernel, we dont have any stdlib, so if you want to use one, implement one your self, and link it static! | |
| // the multiboot info structure ( all we get by the multiboot bootloader ) | |
| struct multiboot_info { |