Annotation of prex-old/usr/arch/arm/setjmp.S, Revision 1.1.1.1
1.1 nbrk 1: /* $NetBSD: setjmp.S,v 1.5 2003/04/05 23:08:51 bjh21 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 -- 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 stack.
45: * The previous signal state is restored.
46: */
47:
48: ENTRY(setjmp)
49: /* Block all signals and retrieve the old signal mask */
50: stmfd sp!, {r0, r14}
51: mov r0, #0x00000000
52:
53: bl PIC_SYM(_C_LABEL(sigblock), PLT)
54: mov r1, r0
55:
56: ldmfd sp!, {r0, r14}
57:
58: /* Store signal mask */
59: str r1, [r0, #((25-13) * 4)]
60:
61: ldr r1, .Lsetjmp_magic
62: str r1, [r0], #4
63:
64: #if 0 /* PREX */
65: #ifdef SOFTFLOAT
66: add r0, r0, #52
67: #else
68: /* Store fp registers */
69: sfm f4, 4, [r0], #48
70: /* Store fpsr */
71: rfs r1
72: str r1, [r0], #0x0004
73: #endif /*SOFTFLOAT*/
74: #endif
75: /* Store integer registers */
76: stmia r0, {r4-r14}
77: mov r0, #0x00000000
78: mov r15, r14
79:
80: .Lsetjmp_magic:
81: .word _JB_MAGIC_SETJMP
82:
83:
84: ENTRY(longjmp)
85: ldr r2, .Lsetjmp_magic
86: ldr r3, [r0]
87: teq r2, r3
88: bne botch
89:
90: /* Fetch signal mask */
91: ldr r2, [r0, #((25-13) * 4)]
92:
93: /* Set signal mask */
94: stmfd sp!, {r0, r1, r14}
95: sub sp, sp, #4 /* align the stack */
96:
97: mov r0, r2
98: bl PIC_SYM(_C_LABEL(sigsetmask), PLT)
99:
100: add sp, sp, #4 /* unalign the stack */
101: ldmfd sp!, {r0, r1, r14}
102:
103: add r0, r0, #4
104: #if 0 /* PREX */
105: #ifdef SOFTFLOAT
106: add r0, r0, #52
107: #else
108: /* Restore fp registers */
109: lfm f4, 4, [r0], #48
110: /* Restore FPSR */
111: ldr r4, [r0], #0x0004
112: wfs r4
113: #endif /* SOFTFLOAT */
114: #endif
115: /* Restore integer registers */
116: ldmia r0, {r4-r14}
117:
118: /* Validate sp and r14 */
119: teq sp, #0
120: teqne r14, #0
121: beq botch
122:
123: /* Set return value */
124:
125: mov r0, r1
126: teq r0, #0x00000000
127: moveq r0, #0x00000001
128: #ifdef __ARM_26__
129: mov r15, r14
130: #else
131: mov r15, r14
132: #endif
133:
134: /* validation failed, die die die. */
135: botch:
136: #if 0 /* PREX */
137: bl PIC_SYM(_C_LABEL(longjmperror), PLT)
138: #endif
139: bl PIC_SYM(_C_LABEL(abort), PLT)
140: b . - 8 /* Cannot get here */
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