| Elliott Hughes | 4906e56 | 2013-10-04 14:55:30 -0700 | [diff] [blame] | 1 | /* $OpenBSD: setjmp.S,v 1.3 2012/08/22 17:19:34 pascal Exp $ */ |
| 2 | /* $NetBSD: __setjmp14.S,v 1.1 2001/06/19 00:25:02 fvdl Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 2001 Wasabi Systems, Inc. |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Written by Frank van der Linden for Wasabi Systems, Inc. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. All advertising materials mentioning features or use of this software |
| 19 | * must display the following acknowledgement: |
| 20 | * This product includes software developed for the NetBSD Project by |
| 21 | * Wasabi Systems, Inc. |
| 22 | * 4. The name of Wasabi Systems, Inc. may not be used to endorse |
| 23 | * or promote products derived from this software without specific prior |
| 24 | * written permission. |
| 25 | * |
| 26 | * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND |
| 27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 28 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 29 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC |
| 30 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 31 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 32 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 33 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 34 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 35 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 36 | * POSSIBILITY OF SUCH DAMAGE. |
| 37 | */ |
| 38 | |
| 39 | |
| 40 | #include <machine/asm.h> |
| 41 | #include <machine/setjmp.h> |
| 42 | |
| 43 | /* |
| 44 | * C library -- _setjmp, _longjmp |
| 45 | * |
| 46 | * longjmp(a,v) |
| 47 | * will generate a "return(v)" from the last call to |
| 48 | * setjmp(a) |
| 49 | * by restoring registers from the stack. |
| 50 | * The previous signal state is restored. |
| 51 | */ |
| 52 | |
| 53 | ENTRY(setjmp) |
| 54 | pushq %rdi |
| 55 | xorq %rdi,%rdi |
| 56 | #ifdef __PIC__ |
| 57 | call PIC_PLT(_C_LABEL(sigblock)) |
| 58 | #else |
| 59 | call _C_LABEL(sigblock) |
| 60 | #endif |
| 61 | popq %rdi |
| 62 | movq %rax,(_JB_SIGMASK * 8)(%rdi) |
| 63 | |
| 64 | movq (%rsp),%r11 |
| 65 | movq %rbx,(_JB_RBX * 8)(%rdi) |
| 66 | movq %rbp,(_JB_RBP * 8)(%rdi) |
| 67 | movq %r12,(_JB_R12 * 8)(%rdi) |
| 68 | movq %r13,(_JB_R13 * 8)(%rdi) |
| 69 | movq %r14,(_JB_R14 * 8)(%rdi) |
| 70 | movq %r15,(_JB_R15 * 8)(%rdi) |
| 71 | movq %rsp,(_JB_RSP * 8)(%rdi) |
| 72 | movq %r11,(_JB_PC * 8)(%rdi) |
| 73 | |
| 74 | 2: xorl %eax,%eax |
| 75 | ret |
| 76 | |
| 77 | ENTRY(longjmp) |
| 78 | movq %rdi,%r12 |
| 79 | movl %esi,%r8d |
| 80 | |
| 81 | movq (_JB_SIGMASK * 8)(%rdi),%rdi |
| 82 | pushq %r8 |
| 83 | #ifdef __PIC__ |
| 84 | call PIC_PLT(_C_LABEL(sigsetmask)) |
| 85 | #else |
| 86 | call _C_LABEL(sigsetmask) |
| 87 | #endif |
| 88 | popq %r8 |
| 89 | movq (_JB_RBX * 8)(%r12),%rbx |
| 90 | movq (_JB_RBP * 8)(%r12),%rbp |
| 91 | movq (_JB_R13 * 8)(%r12),%r13 |
| 92 | movq (_JB_R14 * 8)(%r12),%r14 |
| 93 | movq (_JB_R15 * 8)(%r12),%r15 |
| 94 | movq (_JB_RSP * 8)(%r12),%rsp |
| 95 | movq (_JB_PC * 8)(%r12),%r11 |
| 96 | movq (_JB_R12 * 8)(%r12),%r12 |
| 97 | |
| 98 | movl %r8d,%eax |
| 99 | testl %eax,%eax |
| 100 | jnz 1f |
| 101 | incl %eax |
| 102 | 1: movq %r11,0(%rsp) |
| 103 | ret |