| getcontext.S (240178) | getcontext.S (258447) |
|---|---|
| 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/amd64/sys/getcontext.S 240178 2012-09-06 20:59:49Z jilles $"); | 28__FBSDID("$FreeBSD: head/lib/libc/amd64/sys/getcontext.S 258447 2013-11-21 21:25:58Z andreast $"); |
| 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 */ | 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 | 37 WEAK_REFERENCE(__sys_getcontext, _getcontext) 38 WEAK_REFERENCE(__sys_getcontext, getcontext) |
| 41ENTRY(__sys_getcontext) 42 movq (%rsp),%rsi /* save getcontext return address */ 43 mov $SYS_getcontext,%rax 44 KERNCALL 45 jb HIDENAME(cerror) 46 addq $8,%rsp /* remove stale (setcontext) return address */ 47 jmp *%rsi /* restore return address */ 48END(__sys_getcontext) 49 50 .section .note.GNU-stack,"",%progbits | 39ENTRY(__sys_getcontext) 40 movq (%rsp),%rsi /* save getcontext return address */ 41 mov $SYS_getcontext,%rax 42 KERNCALL 43 jb HIDENAME(cerror) 44 addq $8,%rsp /* remove stale (setcontext) return address */ 45 jmp *%rsi /* restore return address */ 46END(__sys_getcontext) 47 48 .section .note.GNU-stack,"",%progbits |