1 /* $NetBSD: _setjmp.S,v 1.20.34.5 2010/02/03 23:46:47 matt Exp $ */
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35 #include <machine/asm.h>
36 __FBSDID("$FreeBSD$");
40 #if defined(LIBC_SCCS) && !defined(lint)
42 RCSID("from: @(#)_setjmp.s 8.1 (Berkeley) 6/4/93")
44 RCSID("$NetBSD: _setjmp.S,v 1.20.34.5 2010/02/03 23:46:47 matt Exp $")
46 #endif /* LIBC_SCCS and not lint */
49 * C library -- _setjmp, _longjmp
52 * will generate a "return(v)" from
55 * by restoring registers from the stack,
56 * The previous signal state is NOT restored.
63 REG_LI v0, _JB_MAGIC__SETJMP # sigcontext magic number
64 REG_S v0, (_JB_MAGIC * SZREG)(a0)
65 REG_S ra, (_JB_REG_RA * SZREG)(a0)
67 * From "MIPSpro N32 ABI Handbook", Table 2-1:
68 * Registers s0..s7 are callee-saved.
69 * The sp register is callee-saved.
70 * The fp (or s8) register is callee-saved.
71 * The gp register is callee-saved (for n32/n64).
73 REG_S s0, (_JB_REG_S0 * SZREG)(a0)
74 REG_S s1, (_JB_REG_S1 * SZREG)(a0)
75 REG_S s2, (_JB_REG_S2 * SZREG)(a0)
76 REG_S s3, (_JB_REG_S3 * SZREG)(a0)
77 REG_S s4, (_JB_REG_S4 * SZREG)(a0)
78 REG_S s5, (_JB_REG_S5 * SZREG)(a0)
79 REG_S s6, (_JB_REG_S6 * SZREG)(a0)
80 REG_S s7, (_JB_REG_S7 * SZREG)(a0)
81 REG_S sp, (_JB_REG_SP * SZREG)(a0)
82 REG_S s8, (_JB_REG_S8 * SZREG)(a0)
83 #if defined(__mips_n32) || defined(__mips_n64)
84 REG_S gp, (_JB_REG_GP * SZREG)(a0) # newabi gp is callee-saved
87 * From "MIPSpro N32 ABI Handbook", Table 2-1:
88 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved.
89 * In N64, FP registers F24 .. F31 are callee-saved.
90 * In O32, FP registers F20 .. F23 are callee-saved.
92 #ifndef __mips_soft_float
93 cfc1 v0, $31 # too bad can't check if FP used
94 #if defined(__mips_n64) || defined(__mips_n32)
95 FP_S $f30, (_JB_FPREG_F30 * SZREG)(a0)
96 FP_S $f28, (_JB_FPREG_F28 * SZREG)(a0)
97 FP_S $f26, (_JB_FPREG_F26 * SZREG)(a0)
98 FP_S $f24, (_JB_FPREG_F24 * SZREG)(a0)
100 #if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64)
101 FP_S $f22, (_JB_FPREG_F22 * SZREG)(a0)
102 FP_S $f20, (_JB_FPREG_F20 * SZREG)(a0)
104 #if defined(__mips_o32) || defined(__mips_o64)
105 FP_S $f21, (_JB_FPREG_F21 * SZREG)(a0)
106 FP_S $f23, (_JB_FPREG_F23 * SZREG)(a0)
108 #if defined(__mips_n64)
109 FP_S $f25, (_JB_FPREG_F25 * SZREG)(a0)
110 FP_S $f27, (_JB_FPREG_F27 * SZREG)(a0)
111 FP_S $f29, (_JB_FPREG_F29 * SZREG)(a0)
112 FP_S $f31, (_JB_FPREG_F31 * SZREG)(a0)
114 INT_S v0, (_JB_FPREG_FCSR * SZREG)(a0)
115 #endif /* ! __mips_soft_float */
123 PIC_PROLOGUE(_longjmp)
124 PTR_SUBU sp, sp, CALLFRAME_SIZ
125 SAVE_GP(CALLFRAME_GP)
128 REG_L v0, (_JB_MAGIC * SZREG)(a0) # get magic number
129 REG_L ra, (_JB_REG_RA * SZREG)(a0)
130 REG_LI t0, _JB_MAGIC__SETJMP
131 bne v0, t0, botch # jump if error
132 PTR_ADDU sp, sp, CALLFRAME_SIZ # does not matter, sanity
134 * From "MIPSpro N32 ABI Handbook", Table 2-1:
135 * Registers s0..s7 are callee-saved.
136 * The sp register is callee-saved.
137 * The fp (or s8) register is callee-saved.
138 * The gp register is callee-saved (for n32/n64).
140 REG_L s0, (_JB_REG_S0 * SZREG)(a0)
141 REG_L s1, (_JB_REG_S1 * SZREG)(a0)
142 REG_L s2, (_JB_REG_S2 * SZREG)(a0)
143 REG_L s3, (_JB_REG_S3 * SZREG)(a0)
144 REG_L s4, (_JB_REG_S4 * SZREG)(a0)
145 REG_L s5, (_JB_REG_S5 * SZREG)(a0)
146 REG_L s6, (_JB_REG_S6 * SZREG)(a0)
147 REG_L s7, (_JB_REG_S7 * SZREG)(a0)
148 REG_L sp, (_JB_REG_SP * SZREG)(a0)
149 REG_L s8, (_JB_REG_S8 * SZREG)(a0)
150 #if defined(__mips_n32) || defined(__mips_n64)
151 REG_L gp, (_JB_REG_GP * SZREG)(a0)
153 #ifndef __mips_soft_float
155 INT_L v0, (_JB_FPREG_FCSR * SZREG)(a0)
158 * From "MIPSpro N32 ABI Handbook", Table 2-1:
159 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved.
160 * In N64, FP registers F24 .. F31 are callee-saved.
161 * In O32, FP registers F20 .. F23 are callee-saved.
163 #if defined(__mips_n64) || defined(__mips_n32)
164 FP_L $f30, (_JB_FPREG_F30 * SZREG)(a0)
165 FP_L $f28, (_JB_FPREG_F28 * SZREG)(a0)
166 FP_L $f26, (_JB_FPREG_F26 * SZREG)(a0)
167 FP_L $f24, (_JB_FPREG_F24 * SZREG)(a0)
169 #if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64)
170 FP_L $f22, (_JB_FPREG_F22 * SZREG)(a0)
171 FP_L $f20, (_JB_FPREG_F20 * SZREG)(a0)
173 #if defined(__mips_o32) || defined(__mips_o64)
174 FP_L $f21, (_JB_FPREG_F21 * SZREG)(a0)
175 FP_L $f23, (_JB_FPREG_F23 * SZREG)(a0)
177 #if defined(__mips_n64)
178 FP_L $f25, (_JB_FPREG_F25 * SZREG)(a0)
179 FP_L $f27, (_JB_FPREG_F27 * SZREG)(a0)
180 FP_L $f29, (_JB_FPREG_F29 * SZREG)(a0)
181 FP_L $f31, (_JB_FPREG_F31 * SZREG)(a0)
183 #endif /* ! __mips_soft_float */
186 move v0, a1 # get return value in 1st arg
192 * We know we aren't returning so we don't care about restoring
195 PTR_LA t9, _C_LABEL(longjmperror)