setjmp.S revision 1.10.4.1
1 1.10.4.1 wrstuden /* $NetBSD: setjmp.S,v 1.10.4.1 1999/12/27 18:29:35 wrstuden Exp $ */ 2 1.5 jonathan 3 1.1 glass /*- 4 1.1 glass * Copyright (c) 1991, 1993 5 1.1 glass * The Regents of the University of California. All rights reserved. 6 1.1 glass * 7 1.1 glass * This code is derived from software contributed to Berkeley by 8 1.1 glass * Ralph Campbell. 9 1.1 glass * 10 1.1 glass * Redistribution and use in source and binary forms, with or without 11 1.1 glass * modification, are permitted provided that the following conditions 12 1.1 glass * are met: 13 1.1 glass * 1. Redistributions of source code must retain the above copyright 14 1.1 glass * notice, this list of conditions and the following disclaimer. 15 1.1 glass * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 glass * notice, this list of conditions and the following disclaimer in the 17 1.1 glass * documentation and/or other materials provided with the distribution. 18 1.1 glass * 3. All advertising materials mentioning features or use of this software 19 1.1 glass * must display the following acknowledgement: 20 1.1 glass * This product includes software developed by the University of 21 1.1 glass * California, Berkeley and its contributors. 22 1.1 glass * 4. Neither the name of the University nor the names of its contributors 23 1.1 glass * may be used to endorse or promote products derived from this software 24 1.1 glass * without specific prior written permission. 25 1.1 glass * 26 1.1 glass * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 1.1 glass * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 1.1 glass * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 1.1 glass * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 1.1 glass * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 1.1 glass * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 1.1 glass * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 1.1 glass * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 1.1 glass * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 1.1 glass * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 1.1 glass * SUCH DAMAGE. 37 1.1 glass */ 38 1.1 glass 39 1.9 castor #include <machine/cdefs.h> 40 1.1 glass #include <sys/syscall.h> 41 1.6 jonathan #include <mips/regnum.h> 42 1.6 jonathan #include <mips/asm.h> 43 1.10 castor #include <machine/signal.h> 44 1.9 castor #include <machine/setjmp.h> 45 1.1 glass 46 1.1 glass #if defined(LIBC_SCCS) && !defined(lint) 47 1.1 glass ASMSTR("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93") 48 1.10.4.1 wrstuden ASMSTR("$NetBSD: setjmp.S,v 1.10.4.1 1999/12/27 18:29:35 wrstuden Exp $") 49 1.1 glass #endif /* LIBC_SCCS and not lint */ 50 1.1 glass 51 1.6 jonathan #ifdef ABICALLS 52 1.6 jonathan .abicalls 53 1.6 jonathan #endif 54 1.6 jonathan 55 1.1 glass /* 56 1.1 glass * C library -- setjmp, longjmp 57 1.1 glass * 58 1.1 glass * longjmp(a,v) 59 1.1 glass * will generate a "return(v)" from 60 1.1 glass * the last call to 61 1.1 glass * setjmp(a) 62 1.1 glass * by restoring registers from the stack, 63 1.1 glass * and a struct sigcontext, see <signal.h> 64 1.1 glass */ 65 1.1 glass 66 1.10 castor #define SETJMP_FRAME_SIZE (CALLFRAME_SIZ + 12) 67 1.1 glass 68 1.3 mycroft NON_LEAF(setjmp, SETJMP_FRAME_SIZE, ra) 69 1.10 castor .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ) 70 1.6 jonathan #ifdef ABICALLS 71 1.6 jonathan .set noreorder 72 1.6 jonathan .cpload t9 73 1.6 jonathan .set reorder 74 1.6 jonathan #endif 75 1.1 glass subu sp, sp, SETJMP_FRAME_SIZE # allocate stack frame 76 1.6 jonathan #ifdef ABICALLS 77 1.6 jonathan .cprestore 16 78 1.6 jonathan #endif 79 1.10 castor sw ra, CALLFRAME_RA(sp) # save state 80 1.1 glass sw a0, SETJMP_FRAME_SIZE(sp) 81 1.1 glass move a0, zero # get current signal mask 82 1.3 mycroft jal _C_LABEL(sigblock) 83 1.1 glass lw v1, SETJMP_FRAME_SIZE(sp) # v1 = jmpbuf 84 1.1 glass sw v0, (1 * 4)(v1) # save sc_mask = sigblock(0) 85 1.1 glass move a0, zero 86 1.10 castor addu a1, sp, CALLFRAME_SIZ # pointer to struct sigaltstack 87 1.7 thorpej jal _C_LABEL(__sigaltstack14) 88 1.1 glass lw a0, SETJMP_FRAME_SIZE(sp) # restore jmpbuf 89 1.10 castor lw v1, CALLFRAME_SIZ+8(sp) # get old ss_onstack 90 1.1 glass and v1, v1, 1 # extract onstack flag 91 1.1 glass sw v1, 0(a0) # save it in sc_onstack 92 1.10 castor lw ra, CALLFRAME_RA(sp) 93 1.1 glass addu sp, sp, SETJMP_FRAME_SIZE 94 1.1 glass blt v0, zero, botch # check for sigstack() error 95 1.9 castor REG_PROLOGUE 96 1.9 castor REG_S ra, (2 * 4)(a0) # sc_pc = return address 97 1.9 castor REG_LI v0, 0xACEDBADE # sigcontext magic number 98 1.9 castor REG_S v0, (_OFFSETOF_SC_REGS + SZREG * ZERO)(a0) # saved in sc_regs[0] 99 1.9 castor REG_S s0, (_OFFSETOF_SC_REGS + SZREG * S0)(a0) 100 1.9 castor REG_S s1, (_OFFSETOF_SC_REGS + SZREG * S1)(a0) 101 1.9 castor REG_S s2, (_OFFSETOF_SC_REGS + SZREG * S2)(a0) 102 1.9 castor REG_S s3, (_OFFSETOF_SC_REGS + SZREG * S3)(a0) 103 1.9 castor REG_S s4, (_OFFSETOF_SC_REGS + SZREG * S4)(a0) 104 1.9 castor REG_S s5, (_OFFSETOF_SC_REGS + SZREG * S5)(a0) 105 1.9 castor REG_S s6, (_OFFSETOF_SC_REGS + SZREG * S6)(a0) 106 1.9 castor REG_S s7, (_OFFSETOF_SC_REGS + SZREG * S7)(a0) 107 1.9 castor REG_S gp, (_OFFSETOF_SC_REGS + SZREG * GP)(a0) 108 1.9 castor REG_S sp, (_OFFSETOF_SC_REGS + SZREG * SP)(a0) 109 1.9 castor REG_S s8, (_OFFSETOF_SC_REGS + SZREG * S8)(a0) 110 1.1 glass li v0, 1 # be nice if we could tell 111 1.9 castor sw v0, (_OFFSETOF_SC_REGS + 34 * SZREG)(a0) # sc_fpused = 1 112 1.10.4.1 wrstuden #ifndef SOFTFLOAT 113 1.1 glass cfc1 v0, $31 114 1.9 castor swc1 $f20, (20 * 4 + _OFFSETOF_SC_FPREGS)(a0) 115 1.9 castor swc1 $f21, (21 * 4 + _OFFSETOF_SC_FPREGS)(a0) 116 1.9 castor swc1 $f22, (22 * 4 + _OFFSETOF_SC_FPREGS)(a0) 117 1.9 castor swc1 $f23, (23 * 4 + _OFFSETOF_SC_FPREGS)(a0) 118 1.9 castor swc1 $f24, (24 * 4 + _OFFSETOF_SC_FPREGS)(a0) 119 1.9 castor swc1 $f25, (25 * 4 + _OFFSETOF_SC_FPREGS)(a0) 120 1.9 castor swc1 $f26, (26 * 4 + _OFFSETOF_SC_FPREGS)(a0) 121 1.9 castor swc1 $f27, (27 * 4 + _OFFSETOF_SC_FPREGS)(a0) 122 1.9 castor swc1 $f28, (28 * 4 + _OFFSETOF_SC_FPREGS)(a0) 123 1.9 castor swc1 $f29, (29 * 4 + _OFFSETOF_SC_FPREGS)(a0) 124 1.9 castor swc1 $f30, (30 * 4 + _OFFSETOF_SC_FPREGS)(a0) 125 1.9 castor swc1 $f31, (31 * 4 + _OFFSETOF_SC_FPREGS)(a0) 126 1.9 castor sw v0, ((32 * 4) + _OFFSETOF_SC_FPREGS)(a0) 127 1.10.4.1 wrstuden #endif 128 1.9 castor REG_EPILOGUE 129 1.1 glass move v0, zero 130 1.1 glass j ra 131 1.3 mycroft END(setjmp) 132 1.1 glass 133 1.3 mycroft LEAF(longjmp) 134 1.6 jonathan #ifdef ABICALLS 135 1.6 jonathan .set noreorder 136 1.6 jonathan .cpload t9 137 1.6 jonathan .set reorder 138 1.6 jonathan subu sp, sp, 32 139 1.6 jonathan .cprestore 16 140 1.6 jonathan #endif 141 1.9 castor REG_PROLOGUE 142 1.9 castor /* save return value in sc_regs[V0] */ 143 1.9 castor REG_S a1, (_OFFSETOF_SC_REGS + V0 * SZREG)(a0) 144 1.9 castor REG_EPILOGUE 145 1.8 jonathan li v0, SYS_compat_13_sigreturn13 146 1.1 glass syscall 147 1.1 glass botch: 148 1.3 mycroft jal _C_LABEL(longjmperror) 149 1.3 mycroft jal _C_LABEL(abort) 150 1.3 mycroft END(longjmp) 151
Indexes created Wed Oct 01 07:09:59 GMT 2025