1 /* $NetBSD: _setjmp.S,v 1.22 2010/09/03 17:22:51 matt Exp $ */
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35 #include <machine/cdefs.h>
36 #include <mips/regnum.h>
38 #include <machine/setjmp.h>
39 #include <machine/signal.h> /* XXX */
45 #if defined(LIBC_SCCS) && !defined(lint)
47 RCSID("from: @(#)_setjmp.s 8.1 (Berkeley) 6/4/93")
49 RCSID("$NetBSD: _setjmp.S,v 1.22 2010/09/03 17:22:51 matt Exp $")
51 #endif /* LIBC_SCCS and not lint */
54 * C library -- _setjmp, _longjmp
57 * will generate a "return(v)" from
60 * by restoring registers from the stack,
61 * The previous signal state is NOT restored.
68 REG_LI v0, 0xACEDBADE # sigcontext magic number
69 REG_S ra, _OFFSETOF_SC_PC(a0) # sc_pc = return address
70 REG_S v0, _OFFSETOF_SC_REGS(a0) # saved in sc_regs[0]
71 REG_S s0, _OFFSETOF_SC_REGS_S0(a0)
72 REG_S s1, _OFFSETOF_SC_REGS_S1(a0)
73 REG_S s2, _OFFSETOF_SC_REGS_S2(a0)
74 REG_S s3, _OFFSETOF_SC_REGS_S3(a0)
75 REG_S s4, _OFFSETOF_SC_REGS_S4(a0)
76 REG_S s5, _OFFSETOF_SC_REGS_S5(a0)
77 REG_S s6, _OFFSETOF_SC_REGS_S6(a0)
78 REG_S s7, _OFFSETOF_SC_REGS_S7(a0)
79 REG_S sp, _OFFSETOF_SC_REGS_SP(a0)
80 REG_S s8, _OFFSETOF_SC_REGS_S8(a0)
81 #if defined(__mips_n32) || defined(__mips_n64)
82 REG_S gp, _OFFSETOF_SC_REGS_GP(a0) # newabi gp is callee-saved
85 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved.
86 * In N64, FP registers F23 .. F31 are callee-saved.
87 * In O32, FP registers F20 .. F23 are callee-saved.
89 #ifndef SOFTFLOAT_FOR_GCC
90 cfc1 v0, $31 # too bad cant check if FP used
91 INT_S v0, _OFFSETOF_SC_FPREGS_FCSR(a0)
92 #if defined(__mips_n64) || defined(__mips_n32)
93 FP_S $f30, _OFFSETOF_SC_FPREGS_F30(a0)
94 FP_S $f28, _OFFSETOF_SC_FPREGS_F28(a0)
95 FP_S $f26, _OFFSETOF_SC_FPREGS_F26(a0)
96 FP_S $f24, _OFFSETOF_SC_FPREGS_F24(a0)
98 #if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64)
99 FP_S $f22, _OFFSETOF_SC_FPREGS_F22(a0)
100 FP_S $f20, _OFFSETOF_SC_FPREGS_F20(a0)
102 #if defined(__mips_o32) || defined(__mips_o64)
103 FP_S $f21, _OFFSETOF_SC_FPREGS_F21(a0)
104 FP_S $f23, _OFFSETOF_SC_FPREGS_F23(a0)
106 #if defined(__mips_n64)
107 FP_S $f25, _OFFSETOF_SC_FPREGS_F25(a0)
108 FP_S $f27, _OFFSETOF_SC_FPREGS_F27(a0)
109 FP_S $f29, _OFFSETOF_SC_FPREGS_F29(a0)
110 FP_S $f31, _OFFSETOF_SC_FPREGS_F31(a0)
112 #endif /* SOFTFLOAT_FOR_GCC */
120 PIC_PROLOGUE(_longjmp)
121 PTR_SUBU sp, sp, CALLFRAME_SIZ
122 SAVE_GP(CALLFRAME_GP)
125 REG_L v0, _OFFSETOF_SC_REGS(a0) # get magic number
126 REG_L ra, _OFFSETOF_SC_PC(a0)
127 REG_LI t0, 0xACEDBADE
128 bne v0, t0, botch # jump if error
129 PTR_ADDU sp, sp, CALLFRAME_SIZ # does not matter, sanity
130 REG_S a1, _OFFSETOF_SC_REGS_V0(a0) # save return value
131 REG_L s0, _OFFSETOF_SC_REGS_S0(a0)
132 REG_L s1, _OFFSETOF_SC_REGS_S1(a0)
133 REG_L s2, _OFFSETOF_SC_REGS_S2(a0)
134 REG_L s3, _OFFSETOF_SC_REGS_S3(a0)
135 REG_L s4, _OFFSETOF_SC_REGS_S4(a0)
136 REG_L s5, _OFFSETOF_SC_REGS_S5(a0)
137 REG_L s6, _OFFSETOF_SC_REGS_S6(a0)
138 REG_L s7, _OFFSETOF_SC_REGS_S7(a0)
139 #if defined(__mips_n32) || defined(__mips_n64)
140 REG_L gp, _OFFSETOF_SC_REGS_GP(a0)
143 REG_L sp, _OFFSETOF_SC_REGS_SP(a0)
144 REG_L s8, _OFFSETOF_SC_REGS_S8(a0)
145 #ifndef SOFTFLOAT_FOR_GCC
146 INT_L v0, _OFFSETOF_SC_FPREGS_FCSR(a0)
149 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved.
150 * In N64, FP registers F23 .. F31 are callee-saved.
151 * In O32, FP registers F20 .. F23 are callee-saved.
153 #if defined(__mips_n64) || defined(__mips_n32)
154 FP_L $f30, _OFFSETOF_SC_FPREGS_F30(a0)
155 FP_L $f28, _OFFSETOF_SC_FPREGS_F28(a0)
156 FP_L $f26, _OFFSETOF_SC_FPREGS_F26(a0)
157 FP_L $f24, _OFFSETOF_SC_FPREGS_F24(a0)
159 #if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64)
160 FP_L $f22, _OFFSETOF_SC_FPREGS_F22(a0)
161 FP_L $f20, _OFFSETOF_SC_FPREGS_F20(a0)
163 #if defined(__mips_o32) || defined(__mips_o64)
164 FP_L $f21, _OFFSETOF_SC_FPREGS_F21(a0)
165 FP_L $f23, _OFFSETOF_SC_FPREGS_F23(a0)
167 #if defined(__mips_n64)
168 FP_L $f25, _OFFSETOF_SC_FPREGS_F25(a0)
169 FP_L $f27, _OFFSETOF_SC_FPREGS_F27(a0)
170 FP_L $f29, _OFFSETOF_SC_FPREGS_F29(a0)
171 FP_L $f31, _OFFSETOF_SC_FPREGS_F31(a0)
173 #endif /* SOFTFLOAT_FOR_GCC */
176 move v0, a1 # get return value in 1st arg
182 * We know we aren't returning so we don't care about restoring
185 jal _C_LABEL(longjmperror)