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