projects / dragonfly.git / blame
| Commit | Line | Data |
|---|---|---|
| 17030342 MD |
1 | /*- |
| 2 | * Copyright (c) 1990 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * William Jolitz. | |
| 7 | * | |
| 8 | * Redistribution and use in source and binary forms, with or without | |
| 9 | * modification, are permitted provided that the following conditions | |
| 10 | * are met: | |
| 11 | * 1. Redistributions of source code must retain the above copyright | |
| 12 | * notice, this list of conditions and the following disclaimer. | |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 14 | * notice, this list of conditions and the following disclaimer in the | |
| 15 | * documentation and/or other materials provided with the distribution. | |
| 17030342 MD |
16 | * 4. Neither the name of the University nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software | |
| 18 | * without specific prior written permission. | |
| 19 | * | |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 30 | * SUCH DAMAGE. | |
| 31 | * | |
| 32 | * @(#)_setjmp.s 5.1 (Berkeley) 4/23/90 | |
| eb9f4715 | 33 | * $FreeBSD: src/lib/libc/amd64/gen/_setjmp.S,v 1.21 2008/11/02 01:10:54 peter Exp $ |
| 17030342 MD |
34 | */ |
| 35 | ||
| 36 | #include <machine/asm.h> | |
| 37 | ||
| 38 | /* | |
| 39 | * C library -- _setjmp, _longjmp | |
| 40 | * | |
| 41 | * _longjmp(a,v) | |
| 42 | * will generate a "return(v)" from the last call to | |
| 43 | * _setjmp(a) | |
| 44 | * by restoring registers from the environment 'a'. | |
| 45 | * The previous signal state is NOT restored. | |
| 46 | */ | |
| 47 | ||
| 48 | ENTRY(_setjmp) | |
| 49 | movq %rdi,%rax | |
| 50 | movq 0(%rsp),%rdx /* retval */ | |
| 51 | movq %rdx, 0(%rax) /* 0; retval */ | |
| 52 | movq %rbx, 8(%rax) /* 1; rbx */ | |
| 53 | movq %rsp,16(%rax) /* 2; rsp */ | |
| 54 | movq %rbp,24(%rax) /* 3; rbp */ | |
| 55 | movq %r12,32(%rax) /* 4; r12 */ | |
| 56 | movq %r13,40(%rax) /* 5; r13 */ | |
| 57 | movq %r14,48(%rax) /* 6; r14 */ | |
| 58 | movq %r15,56(%rax) /* 7; r15 */ | |
| 59 | fnstcw 64(%rax) /* 8; fpu cw */ | |
| eb9f4715 | 60 | stmxcsr 68(%rax) /* and mxcsr */ |
| 17030342 MD |
61 | xorq %rax,%rax |
| 62 | ret | |
| eb9f4715 | 63 | END(_setjmp) |
| 17030342 MD |
64 | |
| 65 | .weak CNAME(_longjmp) | |
| 66 | .set CNAME(_longjmp),CNAME(___longjmp) | |
| 67 | ENTRY(___longjmp) | |
| 68 | movq %rdi,%rdx | |
| eb9f4715 PA |
69 | /* Restore the mxcsr, but leave exception flags intact. */ |
| 70 | stmxcsr -4(%rsp) | |
| 71 | movl 68(%rdx),%eax | |
| 72 | andl $0xffffffc0,%eax | |
| 73 | movl -4(%rsp),%edi | |
| 74 | andl $0x3f,%edi | |
| 75 | xorl %eax,%edi | |
| 76 | movl %edi,-4(%rsp) | |
| 77 | ldmxcsr -4(%rsp) | |
| 17030342 MD |
78 | movq %rsi,%rax /* retval */ |
| 79 | movq 0(%rdx),%rcx | |
| 80 | movq 8(%rdx),%rbx | |
| 81 | movq 16(%rdx),%rsp | |
| 82 | movq 24(%rdx),%rbp | |
| 83 | movq 32(%rdx),%r12 | |
| 84 | movq 40(%rdx),%r13 | |
| 85 | movq 48(%rdx),%r14 | |
| 86 | movq 56(%rdx),%r15 | |
| 17030342 MD |
87 | fldcw 64(%rdx) |
| 88 | testq %rax,%rax | |
| 89 | jnz 1f | |
| 90 | incq %rax | |
| 91 | 1: movq %rcx,0(%rsp) | |
| 92 | ret | |
| eb9f4715 | 93 | END(___longjmp) |