kern
view src/test_proc.S @ 80:4db99a52863e
fixed the "endianess" of the text messages in the ATA identify info block. this
is the first time I've seen wrong byteorder in ascii text, the ATA committee
should be commended.
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Tue, 06 Dec 2011 13:35:39 +0200 |
| parents | c7bd6ec7b946 |
| children |
line source
1 #define ASM
2 #include <syscall.h>
4 .text
5 .globl test_proc
6 test_proc:
7 /* fork another process */
8 movl $SYS_FORK, %eax
9 int $SYSCALL_INT
11 /* test copy-on-write by pushing the pid to the stack
12 * then use this value from the stack times 2 as a sleep
13 * interval in the loop.
14 */
15 movl $SYS_GETPID, %eax
16 int $SYSCALL_INT
17 push %eax
19 /* this will count the iterations */
20 xor %ecx, %ecx
22 infloop:
23 /* --- print a message --- */
24 movl $SYS_HELLO, %eax
25 int $SYSCALL_INT
28 /* --- sleep for (pid * 2) seconds ---
29 * grab the pid from the stack and shift it left to
30 * multiply the pid by 2. Then use that as a sleep interval
31 * in seconds.
32 */
33 movl (%esp), %ebx
34 shl $1, %ebx
35 movl $SYS_SLEEP, %eax
36 int $SYSCALL_INT
38 inc %ecx
40 /* let process 2 quit after 2 iterations */
41 cmpl $2, (%esp)
42 jne 1f
43 cmpl $2, %ecx
44 je exit_proc
46 1:
47 jmp infloop
49 exit_proc:
50 movl $SYS_EXIT, %eax
51 movl $0, %ebx
52 int $SYSCALL_INT
54 /* shouldn't reach this, trap otherwise */
55 int $3
57 .globl test_proc_end
58 test_proc_end: