1 /* $NetBSD: setjmp.S,v 1.17 2005/09/17 11:49:39 tsutsui Exp $ */
4 * Copyright (c) 1991, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
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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 REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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35 #include <machine/asm.h>
36 __FBSDID("$FreeBSD$");
37 #include <machine/regnum.h>
39 #if defined(LIBC_SCCS) && !defined(lint)
40 ASMSTR("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93")
41 ASMSTR("$NetBSD: setjmp.S,v 1.17 2005/09/17 11:49:39 tsutsui Exp $")
42 #endif /* LIBC_SCCS and not lint */
51 * C library -- setjmp, longjmp
54 * will generate a "return(v)" from
57 * by restoring registers from the stack,
58 * and a struct sigcontext, see <signal.h>
61 #define SETJMP_FRAME_SIZE (CALLFRAME_SIZ + (SZREG * 2))
64 NESTED(setjmp, SETJMP_FRAME_SIZE, ra)
65 .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ)
67 PTR_SUBU sp, sp, SETJMP_FRAME_SIZE # allocate stack frame
69 SETUP_GP64(CALLFRAME_GP, setjmp)
71 REG_S ra, CALLFRAME_RA(sp) # save RA
72 REG_S a0, CALLFRAME_SIZ(sp) # store env
74 /* Get the signal mask. */
75 PTR_ADDU a2, a0, _JB_SIGMASK * SZREG # &oenv
76 li a0, 1 # SIG_SETBLOCK
77 move a1, zero # &env == 0
78 PTR_LA t9, _C_LABEL(sigprocmask) # get current signal mask
82 REG_L a0, CALLFRAME_SIZ(sp) # restore env pointer
83 REG_L ra, CALLFRAME_RA(sp) # restore RA
84 PTR_ADDU sp, sp, SETJMP_FRAME_SIZE # pop stack frame
86 REG_LI v0, _JB_MAGIC_SETJMP
87 REG_S v0, (_JB_MAGIC * SZREG)(a0)
88 REG_S ra, (_JB_REG_RA * SZREG)(a0)
89 REG_S s0, (_JB_REG_S0 * SZREG)(a0)
90 REG_S s1, (_JB_REG_S1 * SZREG)(a0)
91 REG_S s2, (_JB_REG_S2 * SZREG)(a0)
92 REG_S s3, (_JB_REG_S3 * SZREG)(a0)
93 REG_S s4, (_JB_REG_S4 * SZREG)(a0)
94 REG_S s5, (_JB_REG_S5 * SZREG)(a0)
95 REG_S s6, (_JB_REG_S6 * SZREG)(a0)
96 REG_S s7, (_JB_REG_S7 * SZREG)(a0)
97 REG_S sp, (_JB_REG_SP * SZREG)(a0)
98 REG_S s8, (_JB_REG_S8 * SZREG)(a0)
99 #if defined(__mips_n32) || defined(__mips_n64)
100 REG_S gp, (_JB_REG_GP * SZREG)(a0)
107 #define LONGJMP_FRAME_SIZE (CALLFRAME_SIZ + (SZREG * 2))
109 NESTED(longjmp, LONGJMP_FRAME_SIZE, ra)
110 .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ)
111 PIC_PROLOGUE(longjmp)
112 PTR_SUBU sp, sp, LONGJMP_FRAME_SIZE # allocate stack frame
113 SAVE_GP(CALLFRAME_GP)
115 REG_S ra, CALLFRAME_RA(sp) # save RA
116 REG_L v0, (_JB_MAGIC * SZREG)(a0)
117 REG_LI t0, _JB_MAGIC_SETJMP
118 bne v0, t0, botch # jump if error
121 REG_S a0, CALLFRAME_SIZ(sp) # save env
122 REG_S a1, (CALLFRAME_SIZ + SZREG)(sp) # save return value
125 PTR_ADDU a1, a0, _JB_SIGMASK * SZREG # &set
126 move a2, zero # &oset == NULL
127 li a0, 3 # SIG_SETMASK
128 PTR_LA t9,_C_LABEL(sigprocmask) # set current signal mask
132 REG_L a0, CALLFRAME_SIZ(sp) # restore env
133 REG_L a1, (CALLFRAME_SIZ + SZREG)(sp) # restore return value
135 REG_L ra, (_JB_REG_RA * SZREG)(a0)
136 REG_L s0, (_JB_REG_S0 * SZREG)(a0)
137 REG_L s1, (_JB_REG_S1 * SZREG)(a0)
138 REG_L s2, (_JB_REG_S2 * SZREG)(a0)
139 REG_L s3, (_JB_REG_S3 * SZREG)(a0)
140 REG_L s4, (_JB_REG_S4 * SZREG)(a0)
141 REG_L s5, (_JB_REG_S5 * SZREG)(a0)
142 REG_L s6, (_JB_REG_S6 * SZREG)(a0)
143 REG_L s7, (_JB_REG_S7 * SZREG)(a0)
144 REG_L sp, (_JB_REG_SP * SZREG)(a0)
145 REG_L s8, (_JB_REG_S8 * SZREG)(a0)
146 #if defined(__mips_n32) || defined(__mips_n64)
147 REG_L gp, (_JB_REG_GP * SZREG)(a0)
156 * We know we aren't returning so we don't care about restoring
159 PTR_LA t9, _C_LABEL(longjmperror)