alanduan

#include <stdio.h>

int main()
{
    long long a = -1ll;
    unsigned b = 0xff;
    a &= ~b;
    // what is a now?
    printf("0x%016llx\n", a);
}

alanduan

; yasm -o %:r.o % -f elf32 -g stabs
; ld -m elf_i386 %:r.o -o %:r -lc --dynamic-linker /lib/ld-linux.so.2

section .data
dividend    dq 0xdeadbeef12
divisor     dd 0x100
quotient    dd 0
remainder   dd 0

alanduan

; yasm -o %:r.o % -f elf32 -g stabs
; ld -m elf_i386 %:r.o -o %:r -lc --dynamic-linker /lib/ld-linux.so.2

section .text

msg db "hello world!",10,0

extern puts
extern exit

alanduan

int8_t c2hex(int8_t c)
{
    return (unsigned) (c - '0') < 10 ? c - '0' : ((unsigned) (c | 0x20) - 'a' < 6 ? 9 + (c&7) : -1);
}

int8_t _c2hex(int8_t c)
{
    if (c - '0' >= 0 && c - '0' < 10) return c - '0';
    if (c - 'a' >= 0 && c - 'a' <  7) return c - 'a' + 10;
    if (c - 'A' >= 0 && c - 'A' <  7) return c - 'A' + 10;

alanduan

extern uint32_t crc32_table[];

uint32_t
crc32(uint8_t *buf, size_t count, uint32_t crc)
{
    while (count--)
        crc = crc32_table[(crc32 ^ *buf++) & 0xff] ^ crc32 >> 8;
    return crc;
}

alanduan

uint32_t
hash(uint8_t const *buff, size_t count, uint32_t hash, uint8_t bits)
{
  for (size_t i = 0; i < count; i++)
  {
    hash = ((hash << bits) | (hash >> (32 - bits))) ^ buf[i];
  }
  return hash;
}

alanduan

typedef struct dlist_s dlist_t;

struct dlist_s
{
    dlist_t *next;
    dlist_t *prev;
};

void dlist_init(dlist_t *list)
{

alanduan

; get value_addr % 0x10
;
; yasm -f elf32 -o div.o -g stabs div.asm
; or
; yasm -f elf32 -o div.o -g dwarf2 div.asm
;
; ld -m elf_i386 -o div div.o
;
; run the program
; ./div

alanduan

import time
from random import randint
import curses
from console import ConsoleDisplay

if __name__ == '__main__':
    rows, cols = (25, 80)

    def func(stdscr, rows, cols):
        console = ConsoleDisplay(stdscr, rows, cols)

alanduan

from itertools import product


class ConsoleDisplay(object):

    def __init__(self, win, rows, cols):
        win.resize(rows, cols)
        self._win = win
        self.rows = rows
        self.cols = cols