Mercurial > hg > nginx-quic
annotate src/os/unix/rfork_thread.S @ 5860:c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
One intentional side effect of this change is that key is allowed only
in the first position. Previously, it was possible to specify the key
variable at any position, but that was never documented, and is contrary
to nginx configuration practice for positional parameters.
author | Valentin Bartenev <vbart@nginx.com> |
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date | Wed, 24 Sep 2014 21:55:19 +0400 |
parents | d620f497c50f |
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rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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6 |
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7 |
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8 #include <sys/syscall.h> |
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9 #include <machine/asm.h> |
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10 |
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11 /* |
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12 * rfork_thread(3) - rfork_thread(flags, stack, func, arg); |
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13 */ |
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14 |
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15 #define KERNCALL int $0x80 |
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16 |
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17 ENTRY(rfork_thread) |
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18 push %ebp |
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19 mov %esp, %ebp |
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20 push %esi |
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21 |
483 | 22 mov 12(%ebp), %esi # the thread stack address |
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23 |
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24 sub $4, %esi |
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25 mov 20(%ebp), %eax # the thread argument |
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26 mov %eax, (%esi) |
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27 |
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28 sub $4, %esi |
483 | 29 mov 16(%ebp), %eax # the thread start address |
267
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30 mov %eax, (%esi) |
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31 |
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32 push 8(%ebp) # rfork(2) flags |
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33 push $0 |
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34 mov $SYS_rfork, %eax |
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35 KERNCALL |
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36 jc error |
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37 |
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38 cmp $0, %edx |
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39 jne child |
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40 |
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41 parent: |
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42 add $8, %esp |
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43 pop %esi |
483 | 44 leave |
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45 ret |
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46 |
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47 child: |
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48 mov %esi, %esp |
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49 pop %eax |
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50 call *%eax # call a thread start address ... |
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51 add $4, %esp |
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52 |
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53 push %eax |
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54 push $0 |
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55 mov $SYS_exit, %eax # ... and exit(2) after a thread would return |
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56 KERNCALL |
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57 |
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58 error: |
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59 add $8, %esp |
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60 pop %esi |
483 | 61 leave |
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62 PIC_PROLOGUE |
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63 |
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64 /* libc's cerror: jmp PIC_PLT(HIDENAME(cerror)) */ |
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65 |
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66 push %eax |
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67 call PIC_PLT(CNAME(__error)) |
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68 pop %ecx |
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69 PIC_EPILOGUE |
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70 mov %ecx, (%eax) |
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71 mov $-1, %eax |
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72 mov $-1, %edx |
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73 ret |