| /* $OpenBSD: setjmp.S,v 1.3 2012/08/22 17:19:34 pascal Exp $ */ |
| /* $NetBSD: __setjmp14.S,v 1.1 2001/06/19 00:25:02 fvdl Exp $ */ |
| |
| /* |
| * Copyright (c) 2001 Wasabi Systems, Inc. |
| * All rights reserved. |
| * |
| * Written by Frank van der Linden for Wasabi Systems, Inc. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * This product includes software developed for the NetBSD Project by |
| * Wasabi Systems, Inc. |
| * 4. The name of Wasabi Systems, Inc. may not be used to endorse |
| * or promote products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| |
| #include <machine/asm.h> |
| #include <machine/setjmp.h> |
| |
| /* |
| * C library -- _setjmp, _longjmp |
| * |
| * longjmp(a,v) |
| * will generate a "return(v)" from the last call to |
| * setjmp(a) |
| * by restoring registers from the stack. |
| * The previous signal state is restored. |
| */ |
| |
| ENTRY(setjmp) |
| pushq %rdi |
| xorq %rdi,%rdi |
| #ifdef __PIC__ |
| call PIC_PLT(_C_LABEL(sigblock)) |
| #else |
| call _C_LABEL(sigblock) |
| #endif |
| popq %rdi |
| movq %rax,(_JB_SIGMASK * 8)(%rdi) |
| |
| movq (%rsp),%r11 |
| movq %rbx,(_JB_RBX * 8)(%rdi) |
| movq %rbp,(_JB_RBP * 8)(%rdi) |
| movq %r12,(_JB_R12 * 8)(%rdi) |
| movq %r13,(_JB_R13 * 8)(%rdi) |
| movq %r14,(_JB_R14 * 8)(%rdi) |
| movq %r15,(_JB_R15 * 8)(%rdi) |
| movq %rsp,(_JB_RSP * 8)(%rdi) |
| movq %r11,(_JB_PC * 8)(%rdi) |
| |
| 2: xorl %eax,%eax |
| ret |
| |
| ENTRY(longjmp) |
| movq %rdi,%r12 |
| movl %esi,%r8d |
| |
| movq (_JB_SIGMASK * 8)(%rdi),%rdi |
| pushq %r8 |
| #ifdef __PIC__ |
| call PIC_PLT(_C_LABEL(sigsetmask)) |
| #else |
| call _C_LABEL(sigsetmask) |
| #endif |
| popq %r8 |
| movq (_JB_RBX * 8)(%r12),%rbx |
| movq (_JB_RBP * 8)(%r12),%rbp |
| movq (_JB_R13 * 8)(%r12),%r13 |
| movq (_JB_R14 * 8)(%r12),%r14 |
| movq (_JB_R15 * 8)(%r12),%r15 |
| movq (_JB_RSP * 8)(%r12),%rsp |
| movq (_JB_PC * 8)(%r12),%r11 |
| movq (_JB_R12 * 8)(%r12),%r12 |
| |
| movl %r8d,%eax |
| testl %eax,%eax |
| jnz 1f |
| incl %eax |
| 1: movq %r11,0(%rsp) |
| ret |
