setjmp.S revision 1.15
1 1.15 agc /* $NetBSD: setjmp.S,v 1.15 2003/08/07 16:42:15 agc 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 1.15 agc * 3. Neither the name of the University nor the names of its contributors 19 1.1 glass * may be used to endorse or promote products derived from this software 20 1.1 glass * without specific prior written permission. 21 1.1 glass * 22 1.1 glass * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 1.1 glass * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 1.1 glass * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 1.1 glass * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 1.1 glass * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 1.1 glass * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 1.1 glass * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 1.1 glass * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 1.1 glass * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 1.1 glass * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 1.1 glass * SUCH DAMAGE. 33 1.1 glass */ 34 1.1 glass 35 1.9 castor #include <machine/cdefs.h> 36 1.1 glass #include <sys/syscall.h> 37 1.6 jonathan #include <mips/regnum.h> 38 1.6 jonathan #include <mips/asm.h> 39 1.10 castor #include <machine/signal.h> 40 1.9 castor #include <machine/setjmp.h> 41 1.1 glass 42 1.1 glass #if defined(LIBC_SCCS) && !defined(lint) 43 1.1 glass ASMSTR("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93") 44 1.15 agc ASMSTR("$NetBSD: setjmp.S,v 1.15 2003/08/07 16:42:15 agc Exp $") 45 1.1 glass #endif /* LIBC_SCCS and not lint */ 46 1.1 glass 47 1.14 thorpej #ifdef __ABICALLS__ 48 1.6 jonathan .abicalls 49 1.6 jonathan #endif 50 1.6 jonathan 51 1.1 glass /* 52 1.1 glass * C library -- setjmp, longjmp 53 1.1 glass * 54 1.1 glass * longjmp(a,v) 55 1.1 glass * will generate a "return(v)" from 56 1.1 glass * the last call to 57 1.1 glass * setjmp(a) 58 1.1 glass * by restoring registers from the stack, 59 1.1 glass * and a struct sigcontext, see <signal.h> 60 1.1 glass */ 61 1.1 glass 62 1.10 castor #define SETJMP_FRAME_SIZE (CALLFRAME_SIZ + 12) 63 1.1 glass 64 1.3 mycroft NON_LEAF(setjmp, SETJMP_FRAME_SIZE, ra) 65 1.10 castor .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ) 66 1.14 thorpej #ifdef __ABICALLS__ 67 1.6 jonathan .set noreorder 68 1.6 jonathan .cpload t9 69 1.6 jonathan .set reorder 70 1.6 jonathan #endif 71 1.1 glass subu sp, sp, SETJMP_FRAME_SIZE # allocate stack frame 72 1.14 thorpej #ifdef __ABICALLS__ 73 1.6 jonathan .cprestore 16 74 1.6 jonathan #endif 75 1.10 castor sw ra, CALLFRAME_RA(sp) # save state 76 1.1 glass sw a0, SETJMP_FRAME_SIZE(sp) 77 1.1 glass move a0, zero # get current signal mask 78 1.3 mycroft jal _C_LABEL(sigblock) 79 1.1 glass lw v1, SETJMP_FRAME_SIZE(sp) # v1 = jmpbuf 80 1.1 glass sw v0, (1 * 4)(v1) # save sc_mask = sigblock(0) 81 1.1 glass move a0, zero 82 1.10 castor addu a1, sp, CALLFRAME_SIZ # pointer to struct sigaltstack 83 1.7 thorpej jal _C_LABEL(__sigaltstack14) 84 1.1 glass lw a0, SETJMP_FRAME_SIZE(sp) # restore jmpbuf 85 1.10 castor lw v1, CALLFRAME_SIZ+8(sp) # get old ss_onstack 86 1.1 glass and v1, v1, 1 # extract onstack flag 87 1.1 glass sw v1, 0(a0) # save it in sc_onstack 88 1.10 castor lw ra, CALLFRAME_RA(sp) 89 1.1 glass addu sp, sp, SETJMP_FRAME_SIZE 90 1.1 glass blt v0, zero, botch # check for sigstack() error 91 1.9 castor REG_PROLOGUE 92 1.9 castor REG_S ra, (2 * 4)(a0) # sc_pc = return address 93 1.9 castor REG_LI v0, 0xACEDBADE # sigcontext magic number 94 1.9 castor REG_S v0, (_OFFSETOF_SC_REGS + SZREG * ZERO)(a0) # saved in sc_regs[0] 95 1.9 castor REG_S s0, (_OFFSETOF_SC_REGS + SZREG * S0)(a0) 96 1.9 castor REG_S s1, (_OFFSETOF_SC_REGS + SZREG * S1)(a0) 97 1.9 castor REG_S s2, (_OFFSETOF_SC_REGS + SZREG * S2)(a0) 98 1.9 castor REG_S s3, (_OFFSETOF_SC_REGS + SZREG * S3)(a0) 99 1.9 castor REG_S s4, (_OFFSETOF_SC_REGS + SZREG * S4)(a0) 100 1.9 castor REG_S s5, (_OFFSETOF_SC_REGS + SZREG * S5)(a0) 101 1.9 castor REG_S s6, (_OFFSETOF_SC_REGS + SZREG * S6)(a0) 102 1.9 castor REG_S s7, (_OFFSETOF_SC_REGS + SZREG * S7)(a0) 103 1.9 castor REG_S gp, (_OFFSETOF_SC_REGS + SZREG * GP)(a0) 104 1.9 castor REG_S sp, (_OFFSETOF_SC_REGS + SZREG * SP)(a0) 105 1.9 castor REG_S s8, (_OFFSETOF_SC_REGS + SZREG * S8)(a0) 106 1.1 glass li v0, 1 # be nice if we could tell 107 1.9 castor sw v0, (_OFFSETOF_SC_REGS + 34 * SZREG)(a0) # sc_fpused = 1 108 1.1 glass cfc1 v0, $31 109 1.9 castor swc1 $f20, (20 * 4 + _OFFSETOF_SC_FPREGS)(a0) 110 1.9 castor swc1 $f21, (21 * 4 + _OFFSETOF_SC_FPREGS)(a0) 111 1.9 castor swc1 $f22, (22 * 4 + _OFFSETOF_SC_FPREGS)(a0) 112 1.9 castor swc1 $f23, (23 * 4 + _OFFSETOF_SC_FPREGS)(a0) 113 1.9 castor swc1 $f24, (24 * 4 + _OFFSETOF_SC_FPREGS)(a0) 114 1.9 castor swc1 $f25, (25 * 4 + _OFFSETOF_SC_FPREGS)(a0) 115 1.9 castor swc1 $f26, (26 * 4 + _OFFSETOF_SC_FPREGS)(a0) 116 1.9 castor swc1 $f27, (27 * 4 + _OFFSETOF_SC_FPREGS)(a0) 117 1.9 castor swc1 $f28, (28 * 4 + _OFFSETOF_SC_FPREGS)(a0) 118 1.9 castor swc1 $f29, (29 * 4 + _OFFSETOF_SC_FPREGS)(a0) 119 1.9 castor swc1 $f30, (30 * 4 + _OFFSETOF_SC_FPREGS)(a0) 120 1.9 castor swc1 $f31, (31 * 4 + _OFFSETOF_SC_FPREGS)(a0) 121 1.12 shin sw v0, ((32 * 4) + _OFFSETOF_SC_FPREGS)(a0) 122 1.9 castor REG_EPILOGUE 123 1.1 glass move v0, zero 124 1.1 glass j ra 125 1.3 mycroft END(setjmp) 126 1.1 glass 127 1.3 mycroft LEAF(longjmp) 128 1.14 thorpej #ifdef __ABICALLS__ 129 1.6 jonathan .set noreorder 130 1.6 jonathan .cpload t9 131 1.6 jonathan .set reorder 132 1.6 jonathan subu sp, sp, 32 133 1.6 jonathan .cprestore 16 134 1.6 jonathan #endif 135 1.9 castor REG_PROLOGUE 136 1.9 castor /* save return value in sc_regs[V0] */ 137 1.9 castor REG_S a1, (_OFFSETOF_SC_REGS + V0 * SZREG)(a0) 138 1.9 castor REG_EPILOGUE 139 1.8 jonathan li v0, SYS_compat_13_sigreturn13 140 1.1 glass syscall 141 1.1 glass botch: 142 1.3 mycroft jal _C_LABEL(longjmperror) 143 1.3 mycroft jal _C_LABEL(abort) 144 1.3 mycroft END(longjmp) 145
Indexes created Wed Oct 01 07:09:59 GMT 2025