/* $NetBSD: _setjmp.S,v 1.20.34.5 2010/02/03 23:46:47 matt Exp $ */ /*- * Copyright (c) 1991, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Ralph Campbell. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include "SYS.h" #if defined(LIBC_SCCS) && !defined(lint) #if 0 RCSID("from: @(#)_setjmp.s 8.1 (Berkeley) 6/4/93") #else RCSID("$NetBSD: _setjmp.S,v 1.20.34.5 2010/02/03 23:46:47 matt Exp $") #endif #endif /* LIBC_SCCS and not lint */ /* * C library -- _setjmp, _longjmp * * _longjmp(a,v) * will generate a "return(v)" from * the last call to * _setjmp(a) * by restoring registers from the stack, * The previous signal state is NOT restored. */ .set noreorder LEAF(_setjmp) REG_PROLOGUE REG_LI v0, _JB_MAGIC__SETJMP # sigcontext magic number REG_S v0, (_JB_MAGIC * SZREG)(a0) REG_S ra, (_JB_REG_RA * SZREG)(a0) /* * From "MIPSpro N32 ABI Handbook", Table 2-1: * Registers s0..s7 are callee-saved. * The sp register is callee-saved. * The fp (or s8) register is callee-saved. * The gp register is callee-saved (for n32/n64). */ REG_S s0, (_JB_REG_S0 * SZREG)(a0) REG_S s1, (_JB_REG_S1 * SZREG)(a0) REG_S s2, (_JB_REG_S2 * SZREG)(a0) REG_S s3, (_JB_REG_S3 * SZREG)(a0) REG_S s4, (_JB_REG_S4 * SZREG)(a0) REG_S s5, (_JB_REG_S5 * SZREG)(a0) REG_S s6, (_JB_REG_S6 * SZREG)(a0) REG_S s7, (_JB_REG_S7 * SZREG)(a0) REG_S sp, (_JB_REG_SP * SZREG)(a0) REG_S s8, (_JB_REG_S8 * SZREG)(a0) #if defined(__mips_n32) || defined(__mips_n64) REG_S gp, (_JB_REG_GP * SZREG)(a0) # newabi gp is callee-saved #endif /* * From "MIPSpro N32 ABI Handbook", Table 2-1: * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved. * In N64, FP registers F24 .. F31 are callee-saved. * In O32, FP registers F20 .. F23 are callee-saved. */ #ifndef __mips_soft_float cfc1 v0, $31 # too bad can't check if FP used #if defined(__mips_n64) || defined(__mips_n32) FP_S $f30, (_JB_FPREG_F30 * SZREG)(a0) FP_S $f28, (_JB_FPREG_F28 * SZREG)(a0) FP_S $f26, (_JB_FPREG_F26 * SZREG)(a0) FP_S $f24, (_JB_FPREG_F24 * SZREG)(a0) #endif #if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64) FP_S $f22, (_JB_FPREG_F22 * SZREG)(a0) FP_S $f20, (_JB_FPREG_F20 * SZREG)(a0) #endif #if defined(__mips_o32) || defined(__mips_o64) FP_S $f21, (_JB_FPREG_F21 * SZREG)(a0) FP_S $f23, (_JB_FPREG_F23 * SZREG)(a0) #endif #if defined(__mips_n64) FP_S $f25, (_JB_FPREG_F25 * SZREG)(a0) FP_S $f27, (_JB_FPREG_F27 * SZREG)(a0) FP_S $f29, (_JB_FPREG_F29 * SZREG)(a0) FP_S $f31, (_JB_FPREG_F31 * SZREG)(a0) #endif INT_S v0, (_JB_FPREG_FCSR * SZREG)(a0) #endif /* ! __mips_soft_float */ REG_EPILOGUE j ra move v0, zero END(_setjmp) LEAF(_longjmp) PIC_PROLOGUE(_longjmp) PTR_SUBU sp, sp, CALLFRAME_SIZ SAVE_GP(CALLFRAME_GP) REG_PROLOGUE REG_L v0, (_JB_MAGIC * SZREG)(a0) # get magic number REG_L ra, (_JB_REG_RA * SZREG)(a0) REG_LI t0, _JB_MAGIC__SETJMP bne v0, t0, botch # jump if error PTR_ADDU sp, sp, CALLFRAME_SIZ # does not matter, sanity /* * From "MIPSpro N32 ABI Handbook", Table 2-1: * Registers s0..s7 are callee-saved. * The sp register is callee-saved. * The fp (or s8) register is callee-saved. * The gp register is callee-saved (for n32/n64). */ REG_L s0, (_JB_REG_S0 * SZREG)(a0) REG_L s1, (_JB_REG_S1 * SZREG)(a0) REG_L s2, (_JB_REG_S2 * SZREG)(a0) REG_L s3, (_JB_REG_S3 * SZREG)(a0) REG_L s4, (_JB_REG_S4 * SZREG)(a0) REG_L s5, (_JB_REG_S5 * SZREG)(a0) REG_L s6, (_JB_REG_S6 * SZREG)(a0) REG_L s7, (_JB_REG_S7 * SZREG)(a0) REG_L sp, (_JB_REG_SP * SZREG)(a0) REG_L s8, (_JB_REG_S8 * SZREG)(a0) #if defined(__mips_n32) || defined(__mips_n64) REG_L gp, (_JB_REG_GP * SZREG)(a0) #endif #ifndef __mips_soft_float # get fpu status INT_L v0, (_JB_FPREG_FCSR * SZREG)(a0) ctc1 v0, $31 /* * From "MIPSpro N32 ABI Handbook", Table 2-1: * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved. * In N64, FP registers F24 .. F31 are callee-saved. * In O32, FP registers F20 .. F23 are callee-saved. */ #if defined(__mips_n64) || defined(__mips_n32) FP_L $f30, (_JB_FPREG_F30 * SZREG)(a0) FP_L $f28, (_JB_FPREG_F28 * SZREG)(a0) FP_L $f26, (_JB_FPREG_F26 * SZREG)(a0) FP_L $f24, (_JB_FPREG_F24 * SZREG)(a0) #endif #if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64) FP_L $f22, (_JB_FPREG_F22 * SZREG)(a0) FP_L $f20, (_JB_FPREG_F20 * SZREG)(a0) #endif #if defined(__mips_o32) || defined(__mips_o64) FP_L $f21, (_JB_FPREG_F21 * SZREG)(a0) FP_L $f23, (_JB_FPREG_F23 * SZREG)(a0) #endif #if defined(__mips_n64) FP_L $f25, (_JB_FPREG_F25 * SZREG)(a0) FP_L $f27, (_JB_FPREG_F27 * SZREG)(a0) FP_L $f29, (_JB_FPREG_F29 * SZREG)(a0) FP_L $f31, (_JB_FPREG_F31 * SZREG)(a0) #endif #endif /* ! __mips_soft_float */ REG_EPILOGUE bne a1, zero, 1f move v0, a1 # get return value in 1st arg REG_LI v0, 1 # return 1 if arg is 0 1: j ra nop botch: /* * We know we aren't returning so we don't care about restoring * our caller's GP. */ PTR_LA t9, _C_LABEL(longjmperror) jalr t9 nop PIC_TAILCALL(abort) END(_longjmp)