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comparison src/os/unix/rfork_thread.S @ 267:83205e0b5522

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nginx-0.0.2-2004-02-24-20:31:46 import
author Igor Sysoev <igor@sysoev.ru>
date Tue, 24 Feb 2004 17:31:46 +0000
parents
children da8c5707af39
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266:5238e93961a1 267:83205e0b5522
1
2 #include <sys/syscall.h>
3 #include <machine/asm.h>
4
5 /*
6 * rfork_thread(3) - rfork_thread(flags, stack, func, arg);
7 */
8
9 #define KERNCALL int $0x80
10
11 ENTRY(rfork_thread)
12 push %ebp
13 mov %esp, %ebp
14 push %esi
15
16 mov 12(%ebp), %esi # the stack address
17
18 sub $4, %esi
19 mov 20(%ebp), %eax # the thread argument
20 mov %eax, (%esi)
21
22 sub $4, %esi
23 mov 16(%ebp), %eax # the start thread address
24 mov %eax, (%esi)
25
26 push 8(%ebp) # rfork(2) flags
27 push $0
28 mov $SYS_rfork, %eax
29 KERNCALL
30 jc error
31
32 cmp $0, %edx
33 jne child
34
35 parent:
36 add $8, %esp
37 pop %esi
38 mov %ebp, %esp
39 pop %ebp
40 ret
41
42 child:
43 mov %esi, %esp
44 pop %eax
45 call *%eax # call a thread start address ...
46 add $4, %esp
47
48 push %eax
49 push $0
50 mov $SYS_exit, %eax # ... and exit(2) after a thread would return
51 KERNCALL
52
53 error:
54 add $8, %esp
55 pop %esi
56 mov %ebp, %esp
57 pop %ebp
58 PIC_PROLOGUE
59
60 /* libc's cerror: jmp PIC_PLT(HIDENAME(cerror)) */
61
62 push %eax
63 call PIC_PLT(CNAME(__error))
64 pop %ecx
65 PIC_EPILOGUE
66 mov %ecx, (%eax)
67 mov $-1, %eax
68 mov $-1, %edx
69 ret