Mercurial > illumos > onarm

comparison usr/src/cmd/mdb/intel/ia32/libstand/setjmp.s @ 0:c9caec207d52 b86

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Initial porting based on b86
author Koji Uno <koji.uno@sun.com>
date Tue, 02 Jun 2009 18:56:50 +0900
parents
children 1a15d5aaf794
comparison
equal deleted inserted replaced
-1:000000000000 0:c9caec207d52
1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "@(#)setjmp.s 1.3 05/06/08 SMI"
28
29 #if defined(__lint)
30 #include <setjmp.h>
31 #endif
32
33 #include <sys/asm_linkage.h>
34
35 /*
36 * longjmp(env, val)
37 * will generate a "return(val)" from
38 * the last call to
39 * setjmp(env)
40 * by restoring registers ip, sp, bp, bx, si, and di from 'env'
41 * and doing a return.
42 *
43 * entry reg offset from (%si)
44 * env[0] = %ebx 0 / register variables
45 * env[1] = %esi 4
46 * env[2] = %edi 8
47 * env[3] = %ebp 12 / stack frame
48 * env[4] = %esp 16
49 * env[5] = %eip 20
50 */
51
52 #if defined(__lint)
53 /* ARGSUSED */
54 int
55 setjmp(jmp_buf env)
56 {
57 return (0);
58 }
59
60 /* ARGSUSED */
61 int
62 sigsetjmp(sigjmp_buf env, int savemask)
63 {
64 return (0);
65 }
66 #else /* __lint */
67
68 ENTRY(setjmp)
69 ALTENTRY(sigsetjmp)
70 movl 4(%esp),%eax / jmpbuf address
71 movl %ebx,0(%eax) / save ebx
72 movl %esi,4(%eax) / save esi
73 movl %edi,8(%eax) / save edi
74 movl %ebp,12(%eax) / save caller's ebp
75 popl %edx / return address
76 movl %esp,16(%eax) / save caller's esp
77 movl %edx,20(%eax)
78 subl %eax,%eax / return 0
79 jmp *%edx
80 SET_SIZE(sigsetjmp)
81 SET_SIZE(setjmp)
82
83 #endif /* __lint */
84
85 #if defined(__lint)
86 /* ARGSUSED */
87 void
88 longjmp(jmp_buf env, int val)
89 {
90 }
91
92 /* ARGSUSED */
93 void
94 siglongjmp(sigjmp_buf env, int val)
95 {
96 }
97 #else /* __lint */
98
99 ENTRY(longjmp)
100 ALTENTRY(siglongjmp)
101 movl 4(%esp),%edx / first parameter after return addr
102 movl 8(%esp),%eax / second parameter
103 movl 0(%edx),%ebx / restore ebx
104 movl 4(%edx),%esi / restore esi
105 movl 8(%edx),%edi / restore edi
106 movl 12(%edx),%ebp / restore caller's ebp
107 movl 16(%edx),%esp / restore caller's esp
108 test %eax,%eax / if val != 0
109 jnz .ret / return val
110 incl %eax / else return 1
111 .ret:
112 jmp *20(%edx) / return to caller
113 SET_SIZE(siglongjmp)
114 SET_SIZE(longjmp)
115
116 #endif /* __lint */