1 /* $NetBSD: setjmp.S,v 1.19 2010/09/03 17:22:51 matt Exp $ */
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35 #include <sys/syscall.h>
40 #if defined(LIBC_SCCS) && !defined(lint)
42 RCSID("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93")
44 RCSID("$NetBSD: setjmp.S,v 1.19 2010/09/03 17:22:51 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 * and a struct sigcontext, see <signal.h>
59 #define SETJMP_FRAME_SIZE (CALLFRAME_SIZ + STACK_T_SIZE)
61 NON_LEAF(__setjmp14, SETJMP_FRAME_SIZE, ra)
62 .mask 0x80010000, (CALLFRAME_RA - CALLFRAME_SIZ)
64 PTR_SUBU sp, sp, SETJMP_FRAME_SIZE # allocate stack frame
66 SETUP_GP64(CALLFRAME_GP, __setjmp14)
68 REG_S ra, CALLFRAME_RA(sp) # save RA
69 REG_S s0, CALLFRAME_S0(sp) # save S0
70 move s0, a0 # save sigcontext
72 /* Get the signal mask. */
73 PTR_ADDU a2, a0, _OFFSETOF_SC_MASK # &sc.sc_mask
75 jal _C_LABEL(__sigprocmask14) # get current signal mask
77 /* Get the signal stack. */
79 PTR_ADDU a1, sp, CALLFRAME_SIZ # pointer to stack_t
80 jal _C_LABEL(__sigaltstack14)
82 move a0, s0 # restore jmpbuf
83 INT_L v1, CALLFRAME_SIZ+_OFFSETOF_STACK_T_FLAGS(sp)
85 and v1, v1, SS_ONSTACK # extract onstack flag
86 INT_S v1, _OFFSETOF_SC_ONSTACK(a0) # save it in sc_onstack
88 REG_L s0, CALLFRAME_S0(sp) # restore S0
89 REG_L ra, CALLFRAME_RA(sp) # restore RA
90 blt v0, zero, botch # check for sigaltstack() error
93 * We know we won't need this routine's GP anymore.
96 PTR_ADDU sp, sp, SETJMP_FRAME_SIZE # pop stack frame
100 REG_S ra, _OFFSETOF_SC_PC(a0) # sc_pc = return address
101 REG_LI v0, 0xACEDBADE # sigcontext magic number
102 REG_S v0, _OFFSETOF_SC_REGS(a0) # saved in sc_regs[0]
103 REG_S s0, _OFFSETOF_SC_REGS_S0(a0)
104 REG_S s1, _OFFSETOF_SC_REGS_S1(a0)
105 REG_S s2, _OFFSETOF_SC_REGS_S2(a0)
106 REG_S s3, _OFFSETOF_SC_REGS_S3(a0)
107 REG_S s4, _OFFSETOF_SC_REGS_S4(a0)
108 REG_S s5, _OFFSETOF_SC_REGS_S5(a0)
109 REG_S s6, _OFFSETOF_SC_REGS_S6(a0)
110 REG_S s7, _OFFSETOF_SC_REGS_S7(a0)
111 REG_S gp, _OFFSETOF_SC_REGS_GP(a0)
112 REG_S sp, _OFFSETOF_SC_REGS_SP(a0)
113 REG_S s8, _OFFSETOF_SC_REGS_S8(a0)
114 #ifdef SOFTFLOAT_FOR_GCC
115 INT_S zero, _OFFSETOF_SC_FPUSED(a0) # sc_fpused = 0
117 li v0, 1 # be nice if we could tell
118 INT_S v0, _OFFSETOF_SC_FPUSED(a0) # sc_fpused = 1
120 INT_S v0, _OFFSETOF_SC_FPREGS_FCSR(a0)
121 #if defined(__mips_o32) || defined(__mips_o64) || defined(__mips_n32)
122 FP_S $f20, _OFFSETOF_SC_FPREGS_F20(a0)
123 FP_S $f22, _OFFSETOF_SC_FPREGS_F22(a0)
125 #if defined(__mips_o32) || defined(__mips_o64)
126 FP_S $f21, _OFFSETOF_SC_FPREGS_F21(a0)
127 FP_S $f23, _OFFSETOF_SC_FPREGS_F23(a0)
129 #if defined(__mips_n32) || defined(__mips_n64)
130 FP_S $f24, _OFFSETOF_SC_FPREGS_F24(a0)
131 FP_S $f26, _OFFSETOF_SC_FPREGS_F26(a0)
132 FP_S $f28, _OFFSETOF_SC_FPREGS_F28(a0)
133 FP_S $f30, _OFFSETOF_SC_FPREGS_F30(a0)
135 #if defined(__mips_n64)
136 FP_S $f25, _OFFSETOF_SC_FPREGS_F25(a0)
137 FP_S $f27, _OFFSETOF_SC_FPREGS_F27(a0)
138 FP_S $f29, _OFFSETOF_SC_FPREGS_F29(a0)
139 FP_S $f31, _OFFSETOF_SC_FPREGS_F31(a0)
141 #endif /* SOFTFLOAT_FOR_GCC */