1 /* $NetBSD: _setjmp.S,v 1.20.34.5 2010/02/03 23:46:47 matt Exp $ */
4 * Copyright (c) 1991, 1993
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7 * This code is derived from software contributed to Berkeley by
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35 #include <machine/asm.h>
36 __FBSDID("$FreeBSD$");
37 #include <machine/regnum.h>
41 #if defined(LIBC_SCCS) && !defined(lint)
43 RCSID("from: @(#)_setjmp.s 8.1 (Berkeley) 6/4/93")
45 RCSID("$NetBSD: _setjmp.S,v 1.20.34.5 2010/02/03 23:46:47 matt Exp $")
47 #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 * The previous signal state is NOT restored.
64 REG_LI v0, _JB_MAGIC__SETJMP # sigcontext magic number
65 REG_S v0, (_JB_MAGIC * SZREG)(a0)
66 REG_S ra, (_JB_REG_RA * SZREG)(a0)
68 * From "MIPSpro N32 ABI Handbook", Table 2-1:
69 * Registers s0..s7 are callee-saved.
70 * The sp register is callee-saved.
71 * The fp (or s8) register is callee-saved.
72 * The gp register is callee-saved (for n32/n64).
74 REG_S s0, (_JB_REG_S0 * SZREG)(a0)
75 REG_S s1, (_JB_REG_S1 * SZREG)(a0)
76 REG_S s2, (_JB_REG_S2 * SZREG)(a0)
77 REG_S s3, (_JB_REG_S3 * SZREG)(a0)
78 REG_S s4, (_JB_REG_S4 * SZREG)(a0)
79 REG_S s5, (_JB_REG_S5 * SZREG)(a0)
80 REG_S s6, (_JB_REG_S6 * SZREG)(a0)
81 REG_S s7, (_JB_REG_S7 * SZREG)(a0)
82 REG_S sp, (_JB_REG_SP * SZREG)(a0)
83 REG_S s8, (_JB_REG_S8 * SZREG)(a0)
84 #if defined(__mips_n32) || defined(__mips_n64)
85 REG_S gp, (_JB_REG_GP * SZREG)(a0) # newabi gp is callee-saved
88 * From "MIPSpro N32 ABI Handbook", Table 2-1:
89 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved.
90 * In N64, FP registers F24 .. F31 are callee-saved.
91 * In O32, FP registers F20 .. F23 are callee-saved.
94 cfc1 v0, $31 # too bad can't check if FP used
95 #if defined(__mips_n64) || defined(__mips_n32)
96 FP_S $f30, (_JB_FPREG_F30 * SZREG)(a0)
97 FP_S $f28, (_JB_FPREG_F28 * SZREG)(a0)
98 FP_S $f26, (_JB_FPREG_F26 * SZREG)(a0)
99 FP_S $f24, (_JB_FPREG_F24 * SZREG)(a0)
101 #if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64)
102 FP_S $f22, (_JB_FPREG_F22 * SZREG)(a0)
103 FP_S $f20, (_JB_FPREG_F20 * SZREG)(a0)
105 #if defined(__mips_o32) || defined(__mips_o64)
106 FP_S $f21, (_JB_FPREG_F21 * SZREG)(a0)
107 FP_S $f23, (_JB_FPREG_F23 * SZREG)(a0)
109 #if defined(__mips_n64)
110 FP_S $f25, (_JB_FPREG_F25 * SZREG)(a0)
111 FP_S $f27, (_JB_FPREG_F27 * SZREG)(a0)
112 FP_S $f29, (_JB_FPREG_F29 * SZREG)(a0)
113 FP_S $f31, (_JB_FPREG_F31 * SZREG)(a0)
115 INT_S v0, (_JB_FPREG_FCSR * SZREG)(a0)
116 #endif /* ! SOFTFLOAT */
124 PIC_PROLOGUE(_longjmp)
125 PTR_SUBU sp, sp, CALLFRAME_SIZ
126 SAVE_GP(CALLFRAME_GP)
129 REG_L v0, (_JB_MAGIC * SZREG)(a0) # get magic number
130 REG_L ra, (_JB_REG_RA * SZREG)(a0)
131 REG_LI t0, _JB_MAGIC__SETJMP
132 bne v0, t0, botch # jump if error
133 PTR_ADDU sp, sp, CALLFRAME_SIZ # does not matter, sanity
135 * From "MIPSpro N32 ABI Handbook", Table 2-1:
136 * Registers s0..s7 are callee-saved.
137 * The sp register is callee-saved.
138 * The fp (or s8) register is callee-saved.
139 * The gp register is callee-saved (for n32/n64).
141 REG_L s0, (_JB_REG_S0 * SZREG)(a0)
142 REG_L s1, (_JB_REG_S1 * SZREG)(a0)
143 REG_L s2, (_JB_REG_S2 * SZREG)(a0)
144 REG_L s3, (_JB_REG_S3 * SZREG)(a0)
145 REG_L s4, (_JB_REG_S4 * SZREG)(a0)
146 REG_L s5, (_JB_REG_S5 * SZREG)(a0)
147 REG_L s6, (_JB_REG_S6 * SZREG)(a0)
148 REG_L s7, (_JB_REG_S7 * SZREG)(a0)
149 REG_L sp, (_JB_REG_SP * SZREG)(a0)
150 REG_L s8, (_JB_REG_S8 * SZREG)(a0)
151 #if defined(__mips_n32) || defined(__mips_n64)
152 REG_L gp, (_JB_REG_GP * SZREG)(a0)
156 INT_L v0, (_JB_FPREG_FCSR * SZREG)(a0)
159 * From "MIPSpro N32 ABI Handbook", Table 2-1:
160 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved.
161 * In N64, FP registers F24 .. F31 are callee-saved.
162 * In O32, FP registers F20 .. F23 are callee-saved.
164 #if defined(__mips_n64) || defined(__mips_n32)
165 FP_L $f30, (_JB_FPREG_F30 * SZREG)(a0)
166 FP_L $f28, (_JB_FPREG_F28 * SZREG)(a0)
167 FP_L $f26, (_JB_FPREG_F26 * SZREG)(a0)
168 FP_L $f24, (_JB_FPREG_F24 * SZREG)(a0)
170 #if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64)
171 FP_L $f22, (_JB_FPREG_F22 * SZREG)(a0)
172 FP_L $f20, (_JB_FPREG_F20 * SZREG)(a0)
174 #if defined(__mips_o32) || defined(__mips_o64)
175 FP_L $f21, (_JB_FPREG_F21 * SZREG)(a0)
176 FP_L $f23, (_JB_FPREG_F23 * SZREG)(a0)
178 #if defined(__mips_n64)
179 FP_L $f25, (_JB_FPREG_F25 * SZREG)(a0)
180 FP_L $f27, (_JB_FPREG_F27 * SZREG)(a0)
181 FP_L $f29, (_JB_FPREG_F29 * SZREG)(a0)
182 FP_L $f31, (_JB_FPREG_F31 * SZREG)(a0)
184 #endif /* ! SOFTFLOAT */
187 move v0, a1 # get return value in 1st arg
193 * We know we aren't returning so we don't care about restoring
196 PTR_LA t9, _C_LABEL(longjmperror)