1 /* $NetBSD: setjmp.S,v 1.5 2003/04/05 23:08:51 bjh21 Exp $ */
4 * Copyright (c) 1997 Mark Brinicombe
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
35 #include <machine/asm.h>
36 __FBSDID("$FreeBSD$");
38 * C library -- setjmp, longjmp
41 * will generate a "return(v)" from the last call to
43 * by restoring registers from the stack.
44 * The previous signal state is restored.
48 /* Block all signals and retrieve the old signal mask */
50 add r2, r0, #(25 * 4) /* oset */
51 mov r0, #0x00000001 /* SIG_BLOCK */
54 bl PIC_SYM(_C_LABEL(sigprocmask), PLT)
58 ldr r1, .Lsetjmp_magic
64 /* Store fp registers */
70 /* Store integer registers */
76 .word _JB_MAGIC_SETJMP
79 .weak _C_LABEL(longjmp)
80 .set _C_LABEL(longjmp), _C_LABEL(__longjmp)
82 ldr r2, .Lsetjmp_magic
89 stmfd sp!, {r0, r1, r14}
90 sub sp, sp, #4 /* align the stack */
92 add r1, r0, #(25 * 4) /* Signal mask */
93 mov r0, #3 /* SIG_SETMASK */
95 bl PIC_SYM(_C_LABEL(sigprocmask), PLT)
97 add sp, sp, #4 /* unalign the stack */
98 ldmfd sp!, {r0, r1, r14}
104 /* Restore fp registers */
107 ldr r4, [r0], #0x0004
109 #endif /* SOFTFLOAT */
110 /* Restore integer registers */
113 /* Validate sp and r14 */
118 /* Set return value */
122 moveq r0, #0x00000001
125 /* validation failed, die die die. */
127 bl PIC_SYM(_C_LABEL(longjmperror), PLT)
128 bl PIC_SYM(_C_LABEL(abort), PLT)
129 b . - 8 /* Cannot get here */