1/*        $NetBSD: sigsetjmp.S,v 1.8 2013/11/30 20:20:42 joerg Exp $  */
2
3/*
4 * Copyright (c) 1997 Mark Brinicombe
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *        This product includes software developed by Mark Brinicombe
18 * 4. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <machine/asm.h>
36#include <machine/setjmp.h>
37
38/*
39 * C library -- sigsetjmp, siglongjmp
40 *
41 *        longjmp(a,v)
42 * will generate a "return(v)" from the last call to
43 *        setjmp(a, m)
44 * by restoring registers from the stack.
45 * The previous signal state is restored.
46 */
47
48ENTRY(__sigsetjmp14)
49#if defined(__thumb__) && defined(_ARM_ARCH_T2)
50          cbnz      r1, 1f
51          b         PLT_SYM(_C_LABEL(_setjmp))
521:        b         PLT_SYM(_C_LABEL(__setjmp14))
53#elif !defined(__thumb__)
54          cmp       r1, #0
55          beq       PLT_SYM(_C_LABEL(_setjmp))
56          b         PLT_SYM(_C_LABEL(__setjmp14))
57#else
58          push      {r3, lr}
59          beq       1f
60          bl        PLT_SYM(_C_LABEL(__setjmp14))
61          b         2f
621:        bl        PLT_SYM(_C_LABEL(_setjmp))
632:        pop       {r3, pc}
64#endif
65END(__sigsetjmp14)
66
67ENTRY(__siglongjmp14)
68          ldr       r3, [r0]
69#if !defined(__thumb__)
70          bics      r3, r3, #(_JB_MAGIC_SETJMP ^ _JB_MAGIC_SETJMP_VFP)
71#else
72          movs      r2, #(_JB_MAGIC_SETJMP ^ _JB_MAGIC_SETJMP_VFP)
73          bics      r3, r3, r2
74#endif
75          ldr       r2, .L_setjmp_magic
76          cmp       r2, r3
77#if !defined(__thumb__) || defined(_ARM_ARCH_T2)
78#ifdef __thumb__
79          it        eq
80#endif
81          beq       PLT_SYM(_C_LABEL(_longjmp))
82          b         PLT_SYM(_C_LABEL(__longjmp14))
83#else
84          push      {r3, lr}
85          beq       11f
86          bl        PLT_SYM(_C_LABEL(__longjmp14))
87          pop       {r3, pc}
8811:       bl        PLT_SYM(_C_LABEL(_longjmp))
89          pop       {r3, pc}
90#endif
91
92          .align    0
93.L_setjmp_magic:
94          .word     _JB_MAGIC__SETJMP
95END(__siglongjmp14)
96