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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22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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35 #include <machine/asm.h>
36 __FBSDID("$FreeBSD$");
38 #if defined(LIBC_SCCS) && !defined(lint)
39 ASMSTR("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93")
40 ASMSTR("$NetBSD: setjmp.S,v 1.17 2005/09/17 11:49:39 tsutsui Exp $")
41 #endif /* LIBC_SCCS and not lint */
50 * C library -- setjmp, longjmp
53 * will generate a "return(v)" from
56 * by restoring registers from the stack,
57 * and a struct sigcontext, see <signal.h>
60 #define SETJMP_FRAME_SIZE (CALLFRAME_SIZ + (SZREG * 2))
63 NESTED(setjmp, SETJMP_FRAME_SIZE, ra)
64 .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ)
66 PTR_SUBU sp, sp, SETJMP_FRAME_SIZE # allocate stack frame
68 SETUP_GP64(CALLFRAME_GP, setjmp)
70 REG_S ra, CALLFRAME_RA(sp) # save RA
71 REG_S a0, CALLFRAME_SIZ(sp) # store env
73 /* Get the signal mask. */
74 PTR_ADDU a2, a0, _JB_SIGMASK * SZREG # &oenv
75 li a0, 1 # SIG_SETBLOCK
76 move a1, zero # &env == 0
77 PTR_LA t9, _C_LABEL(sigprocmask) # get current signal mask
81 REG_L a0, CALLFRAME_SIZ(sp) # restore env pointer
82 REG_L ra, CALLFRAME_RA(sp) # restore RA
83 PTR_ADDU sp, sp, SETJMP_FRAME_SIZE # pop stack frame
85 REG_LI v0, _JB_MAGIC_SETJMP
86 REG_S v0, (_JB_MAGIC * SZREG)(a0)
87 REG_S ra, (_JB_REG_RA * SZREG)(a0)
89 * From "MIPSpro N32 ABI Handbook", Table 2-1:
90 * Registers s0..s7 are callee-saved.
91 * The sp register is callee-saved.
92 * The fp (or s8) register is callee-saved.
93 * The gp register is callee-saved (for n32/n64).
95 REG_S s0, (_JB_REG_S0 * SZREG)(a0)
96 REG_S s1, (_JB_REG_S1 * SZREG)(a0)
97 REG_S s2, (_JB_REG_S2 * SZREG)(a0)
98 REG_S s3, (_JB_REG_S3 * SZREG)(a0)
99 REG_S s4, (_JB_REG_S4 * SZREG)(a0)
100 REG_S s5, (_JB_REG_S5 * SZREG)(a0)
101 REG_S s6, (_JB_REG_S6 * SZREG)(a0)
102 REG_S s7, (_JB_REG_S7 * SZREG)(a0)
103 REG_S sp, (_JB_REG_SP * SZREG)(a0)
104 REG_S s8, (_JB_REG_S8 * SZREG)(a0)
105 #if defined(__mips_n32) || defined(__mips_n64)
106 REG_S gp, (_JB_REG_GP * SZREG)(a0)
108 #ifndef __mips_soft_float
110 * From "MIPSpro N32 ABI Handbook", Table 2-1:
111 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved.
112 * In N64, FP registers F24 .. F31 are callee-saved.
113 * In O32, FP registers F20 .. F23 are callee-saved.
116 INT_S v0, (_JB_FPREG_FCSR * SZREG)(a0)
117 #if defined(__mips_o32) || defined(__mips_o64) || defined(__mips_n32)
118 FP_S $f20, (_JB_FPREG_F20 * SZREG)(a0)
119 FP_S $f22, (_JB_FPREG_F22 * SZREG)(a0)
121 #if defined(__mips_o32) || defined(__mips_o64)
122 FP_S $f21, (_JB_FPREG_F21 * SZREG)(a0)
123 FP_S $f23, (_JB_FPREG_F23 * SZREG)(a0)
125 #if defined(__mips_n32) || defined(__mips_n64)
126 FP_S $f24, (_JB_FPREG_F24 * SZREG)(a0)
127 FP_S $f26, (_JB_FPREG_F26 * SZREG)(a0)
128 FP_S $f28, (_JB_FPREG_F28 * SZREG)(a0)
129 FP_S $f30, (_JB_FPREG_F30 * SZREG)(a0)
131 #if defined(__mips_n64)
132 FP_S $f25, (_JB_FPREG_F25 * SZREG)(a0)
133 FP_S $f27, (_JB_FPREG_F27 * SZREG)(a0)
134 FP_S $f29, (_JB_FPREG_F29 * SZREG)(a0)
135 FP_S $f31, (_JB_FPREG_F31 * SZREG)(a0)
137 #endif /* ! __mips_soft_float */
143 #define LONGJMP_FRAME_SIZE (CALLFRAME_SIZ + (SZREG * 2))
145 NESTED(longjmp, LONGJMP_FRAME_SIZE, ra)
146 .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ)
147 PIC_PROLOGUE(longjmp)
148 PTR_SUBU sp, sp, LONGJMP_FRAME_SIZE # allocate stack frame
149 SAVE_GP(CALLFRAME_GP)
151 REG_S ra, CALLFRAME_RA(sp) # save RA
152 REG_L v0, (_JB_MAGIC * SZREG)(a0)
153 REG_LI t0, _JB_MAGIC_SETJMP
154 bne v0, t0, botch # jump if error
157 REG_S a0, CALLFRAME_SIZ(sp) # save env
158 REG_S a1, (CALLFRAME_SIZ + SZREG)(sp) # save return value
161 PTR_ADDU a1, a0, _JB_SIGMASK * SZREG # &set
162 move a2, zero # &oset == NULL
163 li a0, 3 # SIG_SETMASK
164 PTR_LA t9,_C_LABEL(sigprocmask) # set current signal mask
168 REG_L a0, CALLFRAME_SIZ(sp) # restore env
169 REG_L a1, (CALLFRAME_SIZ + SZREG)(sp) # restore return value
171 REG_L ra, (_JB_REG_RA * SZREG)(a0)
173 * From "MIPSpro N32 ABI Handbook", Table 2-1:
174 * Registers s0..s7 are callee-saved.
175 * The sp register is callee-saved.
176 * The fp (or s8) register is callee-saved.
177 * The gp register is callee-saved (for n32/n64).
179 REG_L s0, (_JB_REG_S0 * SZREG)(a0)
180 REG_L s1, (_JB_REG_S1 * SZREG)(a0)
181 REG_L s2, (_JB_REG_S2 * SZREG)(a0)
182 REG_L s3, (_JB_REG_S3 * SZREG)(a0)
183 REG_L s4, (_JB_REG_S4 * SZREG)(a0)
184 REG_L s5, (_JB_REG_S5 * SZREG)(a0)
185 REG_L s6, (_JB_REG_S6 * SZREG)(a0)
186 REG_L s7, (_JB_REG_S7 * SZREG)(a0)
187 REG_L sp, (_JB_REG_SP * SZREG)(a0)
188 REG_L s8, (_JB_REG_S8 * SZREG)(a0)
189 #if defined(__mips_n32) || defined(__mips_n64)
190 REG_L gp, (_JB_REG_GP * SZREG)(a0)
192 #ifndef __mips_soft_float
194 * From "MIPSpro N32 ABI Handbook", Table 2-1:
195 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved.
196 * In N64, FP registers F23 .. F31 are callee-saved.
197 * In O32, FP registers F20 .. F23 are callee-saved.
199 INT_L v0, (_JB_FPREG_FCSR * SZREG)(a0)
201 #if defined(__mips_n64) || defined(__mips_n32)
202 FP_L $f30, (_JB_FPREG_F30 * SZREG)(a0)
203 FP_L $f28, (_JB_FPREG_F28 * SZREG)(a0)
204 FP_L $f26, (_JB_FPREG_F26 * SZREG)(a0)
205 FP_L $f24, (_JB_FPREG_F24 * SZREG)(a0)
207 #if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64)
208 FP_L $f22, (_JB_FPREG_F22 * SZREG)(a0)
209 FP_L $f20, (_JB_FPREG_F20 * SZREG)(a0)
211 #if defined(__mips_o32) || defined(__mips_o64)
212 FP_L $f21, (_JB_FPREG_F21 * SZREG)(a0)
213 FP_L $f23, (_JB_FPREG_F23 * SZREG)(a0)
215 #if defined(__mips_n64)
216 FP_L $f25, (_JB_FPREG_F25 * SZREG)(a0)
217 FP_L $f27, (_JB_FPREG_F27 * SZREG)(a0)
218 FP_L $f29, (_JB_FPREG_F29 * SZREG)(a0)
219 FP_L $f31, (_JB_FPREG_F31 * SZREG)(a0)
221 #endif /* ! __mips_soft_float */
229 * We know we aren't returning so we don't care about restoring
232 PTR_LA t9, _C_LABEL(longjmperror)