projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| e853ea00 UD |
1 | /* Copyright (C) 1996, 1997, 1998, 2000, 2003, 2004 |
| 2 | Free Software Foundation, Inc. | |
| 41bdb6e2 | 3 | This file is part of the GNU C Library. |
| 9d187dd4 | 4 | Contributed by Richard Henderson (rth@tamu.edu). |
| 84384f5b | 5 | |
| 0c5ecdc4 | 6 | The GNU C Library is free software; you can redistribute it and/or |
| 41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| 84384f5b | 10 | |
| 0c5ecdc4 UD |
11 | The GNU C Library is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 14 | Lesser General Public License for more details. |
| 84384f5b | 15 | |
| 41bdb6e2 AJ |
16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, write to the Free | |
| 18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 19 | 02111-1307 USA. */ | |
| 84384f5b UD |
20 | |
| 21 | /* clone() is even more special than fork() as it mucks with stacks | |
| 22 | and invokes a function in the right context after its all over. */ | |
| 0c5ecdc4 | 23 | |
| 84384f5b UD |
24 | #include <asm/errno.h> |
| 25 | #include <asm/unistd.h> | |
| e853ea00 UD |
26 | #include <tcb-offsets.h> |
| 27 | ||
| 28 | #define CLONE_VM 0x00000100 | |
| 29 | #define CLONE_THREAD 0x00010000 | |
| 84384f5b | 30 | |
| b5bc52ef UD |
31 | /* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg, |
| 32 | pid_t *ptid, void *tls, pid_t *ctid); */ | |
| 84384f5b UD |
33 | |
| 34 | .text | |
| a334319f UD |
35 | .align 4 |
| 36 | .globl __clone | |
| 37 | .type __clone,@function | |
| 38 | ||
| 39 | __clone: | |
| 84384f5b | 40 | save %sp,-96,%sp |
| 0c5ecdc4 | 41 | |
| 84384f5b | 42 | /* sanity check arguments */ |
| a334319f | 43 | tst %i0 |
| 4194bc66 | 44 | be .Lerror |
| 09bf6406 | 45 | orcc %i1,%g0,%o1 |
| 4194bc66 | 46 | be .Lerror |
| 09bf6406 | 47 | mov %i2,%o0 |
| b5bc52ef UD |
48 | /* ptid */ |
| 49 | mov %i4,%o2 | |
| 50 | /* tls */ | |
| 51 | mov %i5,%o3 | |
| 52 | /* ctid */ | |
| 53 | ld [%fp+92],%o4 | |
| 84384f5b | 54 | |
| 0c5ecdc4 | 55 | /* Do the system call */ |
| 84384f5b UD |
56 | set __NR_clone,%g1 |
| 57 | ta 0x10 | |
| bf47fa23 | 58 | bcs .Lerror |
| 4194bc66 | 59 | tst %o1 |
| 84384f5b | 60 | bne __thread_start |
| 4194bc66 | 61 | nop |
| a334319f | 62 | ret |
| 09bf6406 | 63 | restore %o0,%g0,%o0 |
| 0c5ecdc4 | 64 | |
| 4194bc66 | 65 | .Lerror: |
| 84384f5b | 66 | call __errno_location |
| bf47fa23 | 67 | or %g0,EINVAL,%i0 |
| 84384f5b | 68 | st %i0,[%o0] |
| a334319f | 69 | ret |
| 09bf6406 | 70 | restore %g0,-1,%o0 |
| a334319f UD |
71 | |
| 72 | .size __clone, .-__clone | |
| 4194bc66 RH |
73 | |
| 74 | .type __thread_start,@function | |
| 0ecb606c | 75 | |
| a334319f | 76 | __thread_start: |
| e853ea00 UD |
77 | #ifdef RESET_PID |
| 78 | sethi %hi(CLONE_THREAD), %l0 | |
| a334319f | 79 | andcc %i2, %l0, %g0 |
| e853ea00 | 80 | bne 1f |
| a334319f | 81 | andcc %i2, CLONE_VM, %g0 |
| e853ea00 UD |
82 | bne,a 2f |
| 83 | mov -1,%o0 | |
| 84 | set __NR_getpid,%g1 | |
| 85 | ta 0x10 | |
| a334319f | 86 | 2: st %o0,[%g7 + PID] |
| e853ea00 UD |
87 | st %o0,[%g7 + TID] |
| 88 | 1: | |
| 89 | #endif | |
| a334319f UD |
90 | call %i0 |
| 91 | mov %i3,%o0 | |
| 84384f5b | 92 | call _exit,0 |
| 4194bc66 RH |
93 | nop |
| 94 | ||
| 95 | .size __thread_start, .-__thread_start | |
| 96 | ||
| a334319f | 97 | weak_alias(__clone, clone) |