| getcontext.S (217106) | getcontext.S (240152) |
|---|---|
| 1/*- 2 * Copyright (c) 2003 Peter Wemm <peter@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <machine/asm.h> | 1/*- 2 * Copyright (c) 2003 Peter Wemm <peter@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <machine/asm.h> |
| 28__FBSDID("$FreeBSD: head/lib/libc/i386/sys/getcontext.S 217106 2011-01-07 16:08:40Z kib $"); | 28__FBSDID("$FreeBSD: head/lib/libc/i386/sys/getcontext.S 240152 2012-09-05 21:41:05Z jilles $"); |
| 29 30#include <SYS.h> 31 32/* 33 * This has to be magic to handle the multiple returns. 34 * Otherwise, the setcontext() syscall will return here and we'll 35 * pop off the return address and go to the *setcontext* call. 36 */ 37 .weak _getcontext 38 .set _getcontext,__sys_getcontext 39 .weak getcontext 40 .set getcontext,__sys_getcontext 41ENTRY(__sys_getcontext) 42 movl (%esp),%ecx /* save getcontext return address */ 43 mov $SYS_getcontext,%eax 44 KERNCALL | 29 30#include <SYS.h> 31 32/* 33 * This has to be magic to handle the multiple returns. 34 * Otherwise, the setcontext() syscall will return here and we'll 35 * pop off the return address and go to the *setcontext* call. 36 */ 37 .weak _getcontext 38 .set _getcontext,__sys_getcontext 39 .weak getcontext 40 .set getcontext,__sys_getcontext 41ENTRY(__sys_getcontext) 42 movl (%esp),%ecx /* save getcontext return address */ 43 mov $SYS_getcontext,%eax 44 KERNCALL |
| 45 jb 1f | 45 jb HIDENAME(cerror) |
| 46 addl $4,%esp /* remove stale (setcontext) return address */ 47 jmp *%ecx /* restore return address */ | 46 addl $4,%esp /* remove stale (setcontext) return address */ 47 jmp *%ecx /* restore return address */ |
| 481: 49 PIC_PROLOGUE 50 jmp PIC_PLT(HIDENAME(cerror)) | |
| 51END(__sys_getcontext) 52 53 .section .note.GNU-stack,"",%progbits | 48END(__sys_getcontext) 49 50 .section .note.GNU-stack,"",%progbits |