setjmp.S revision 1.17
1 1.17 tsutsui /* $NetBSD: setjmp.S,v 1.17 2005/09/17 11:49:39 tsutsui 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 1.17 tsutsui ASMSTR("$NetBSD: setjmp.S,v 1.17 2005/09/17 11:49:39 tsutsui 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 1.17 tsutsui NON_LEAF(__setjmp14, 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 1.17 tsutsui sw ra, CALLFRAME_RA(sp) # save RA 76 1.17 tsutsui sw a0, SETJMP_FRAME_SIZE(sp) # squirrel away sc 77 1.17 tsutsui 78 1.17 tsutsui /* Get the signal mask. */ 79 1.17 tsutsui addu a2, a0, _OFFSETOF_SC_MASK # &sc.sc_mask 80 1.17 tsutsui move a1, zero 81 1.17 tsutsui jal _C_LABEL(__sigprocmask14) # get current signal mask 82 1.17 tsutsui move a0, zero # (in delay slot) 83 1.17 tsutsui 84 1.17 tsutsui /* Get the signal stack. */ 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 1.17 tsutsui nop 89 1.10 castor lw v1, CALLFRAME_SIZ+8(sp) # get old ss_onstack 90 1.17 tsutsui lw a0, SETJMP_FRAME_SIZE(sp) # restore sc pointer 91 1.1 glass and v1, v1, 1 # extract onstack flag 92 1.1 glass sw v1, 0(a0) # save it in sc_onstack 93 1.17 tsutsui 94 1.17 tsutsui lw ra, CALLFRAME_RA(sp) # restore RA 95 1.17 tsutsui addu sp, sp, SETJMP_FRAME_SIZE # pop stack frame 96 1.17 tsutsui 97 1.17 tsutsui blt v0, zero, botch # check for sigaltstack() error 98 1.17 tsutsui 99 1.9 castor REG_PROLOGUE 100 1.9 castor REG_S ra, (2 * 4)(a0) # sc_pc = return address 101 1.9 castor REG_LI v0, 0xACEDBADE # sigcontext magic number 102 1.17 tsutsui REG_S v0, (_OFFSETOF_SC_REGS + _R_ZERO * SZREG)(a0) # saved in sc_regs[0] 103 1.17 tsutsui REG_S s0, (_OFFSETOF_SC_REGS + _R_S0 * SZREG)(a0) 104 1.17 tsutsui REG_S s1, (_OFFSETOF_SC_REGS + _R_S1 * SZREG)(a0) 105 1.17 tsutsui REG_S s2, (_OFFSETOF_SC_REGS + _R_S2 * SZREG)(a0) 106 1.17 tsutsui REG_S s3, (_OFFSETOF_SC_REGS + _R_S3 * SZREG)(a0) 107 1.17 tsutsui REG_S s4, (_OFFSETOF_SC_REGS + _R_S4 * SZREG)(a0) 108 1.17 tsutsui REG_S s5, (_OFFSETOF_SC_REGS + _R_S5 * SZREG)(a0) 109 1.17 tsutsui REG_S s6, (_OFFSETOF_SC_REGS + _R_S6 * SZREG)(a0) 110 1.17 tsutsui REG_S s7, (_OFFSETOF_SC_REGS + _R_S7 * SZREG)(a0) 111 1.17 tsutsui REG_S gp, (_OFFSETOF_SC_REGS + _R_GP * SZREG)(a0) 112 1.17 tsutsui REG_S sp, (_OFFSETOF_SC_REGS + _R_SP * SZREG)(a0) 113 1.17 tsutsui REG_S s8, (_OFFSETOF_SC_REGS + _R_S8 * SZREG)(a0) 114 1.1 glass li v0, 1 # be nice if we could tell 115 1.9 castor sw v0, (_OFFSETOF_SC_REGS + 34 * SZREG)(a0) # sc_fpused = 1 116 1.1 glass cfc1 v0, $31 117 1.9 castor swc1 $f20, (20 * 4 + _OFFSETOF_SC_FPREGS)(a0) 118 1.9 castor swc1 $f21, (21 * 4 + _OFFSETOF_SC_FPREGS)(a0) 119 1.9 castor swc1 $f22, (22 * 4 + _OFFSETOF_SC_FPREGS)(a0) 120 1.9 castor swc1 $f23, (23 * 4 + _OFFSETOF_SC_FPREGS)(a0) 121 1.9 castor swc1 $f24, (24 * 4 + _OFFSETOF_SC_FPREGS)(a0) 122 1.9 castor swc1 $f25, (25 * 4 + _OFFSETOF_SC_FPREGS)(a0) 123 1.9 castor swc1 $f26, (26 * 4 + _OFFSETOF_SC_FPREGS)(a0) 124 1.9 castor swc1 $f27, (27 * 4 + _OFFSETOF_SC_FPREGS)(a0) 125 1.9 castor swc1 $f28, (28 * 4 + _OFFSETOF_SC_FPREGS)(a0) 126 1.9 castor swc1 $f29, (29 * 4 + _OFFSETOF_SC_FPREGS)(a0) 127 1.9 castor swc1 $f30, (30 * 4 + _OFFSETOF_SC_FPREGS)(a0) 128 1.9 castor swc1 $f31, (31 * 4 + _OFFSETOF_SC_FPREGS)(a0) 129 1.17 tsutsui sw v0, (32 * 4 + _OFFSETOF_SC_FPREGS)(a0) 130 1.1 glass move v0, zero 131 1.1 glass j ra 132 1.9 castor REG_EPILOGUE 133 1.1 glass botch: 134 1.3 mycroft jal _C_LABEL(abort) 135 1.17 tsutsui END(__setjmp14) 136
Indexes created Tue Sep 30 20:09:53 GMT 2025