/* $OpenBSD: setjmp.S,v 1.5 2005/08/07 16:40:15 espie Exp $ */ /* * Copyright (c) 2001-2002 Opsycon AB (www.opsycon.se / www.opsycon.com) * * 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 Opsycon AB 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 AUTHOR ``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 AUTHOR 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 #include /* * setjmp, longjmp implementation for libc. this code depends * on the layout of the struct sigcontext in machine/signal.h. * */ FRAMESZ= MKFSIZ(2,6) A1OFF= FRAMESZ-4*REGSZ A0OFF= FRAMESZ-3*REGSZ GPOFF= FRAMESZ-2*REGSZ RAOFF= FRAMESZ-1*REGSZ #define FPREG64_S(FPR, OFF, BASE) \ swc1 FPR, OFF(BASE) ; \ mfhc1 t0, FPR ; \ sw t0, OFF+4(BASE) ; #define FPREG64_L(FPR, OFF, BASE) \ lw t0, OFF+4(BASE) ; \ lw t1, OFF(BASE) ; \ mtc1 t1, FPR ; \ mthc1 t0, FPR ; \ NON_LEAF(setjmp, FRAMESZ, ra) .mask 0x80000000, RAOFF PTR_SUBU sp, FRAMESZ # allocate stack frame SETUP_GP64(GPOFF, setjmp) SAVE_GP(GPOFF) .set reorder REG_S ra, RAOFF(sp) # save state REG_S a0, A0OFF(sp) move a0, zero # get current signal mask jal sigblock REG_L v1, A0OFF(sp) # v1 = jmpbuf REG_S v0, SC_MASK(v1) # save sc_mask = sigblock(0) REG_L a0, A0OFF(sp) # restore jmpbuf REG_L ra, RAOFF(sp) REG_S ra, SC_PC(a0) # sc_pc = return address #if defined(__mips64) dli v0, 0xACEDBADE # sigcontext magic number #else li v0, 0xACEDBADE # sigcontext magic number #endif REG_S v0, SC_REGS+ZERO*REGSZ(a0) REG_S s0, SC_REGS+S0*REGSZ(a0) REG_S s1, SC_REGS+S1*REGSZ(a0) REG_S s2, SC_REGS+S2*REGSZ(a0) REG_S s3, SC_REGS+S3*REGSZ(a0) REG_S s4, SC_REGS+S4*REGSZ(a0) REG_S s5, SC_REGS+S5*REGSZ(a0) REG_S s6, SC_REGS+S6*REGSZ(a0) REG_S s7, SC_REGS+S7*REGSZ(a0) REG_S s8, SC_REGS+S8*REGSZ(a0) REG_L v0, GPOFF(sp) REG_S v0, SC_REGS+GP*REGSZ(a0) PTR_ADDU v0, sp, FRAMESZ REG_S v0, SC_REGS+SP*REGSZ(a0) #if !defined(SOFTFLOAT) li v0, 1 # be nice if we could tell REG_S v0, SC_FPUSED(a0) # sc_fpused = 1 cfc1 v0, $31 #if _MIPS_FPSET == 32 FPREG64_S($f20, SC_FPREGS+((F20-F0)*REGSZ_FP), a0) FPREG64_S($f21, SC_FPREGS+((F21-F0)*REGSZ_FP), a0) FPREG64_S($f22, SC_FPREGS+((F22-F0)*REGSZ_FP), a0) FPREG64_S($f23, SC_FPREGS+((F23-F0)*REGSZ_FP), a0) FPREG64_S($f24, SC_FPREGS+((F24-F0)*REGSZ_FP), a0) FPREG64_S($f25, SC_FPREGS+((F25-F0)*REGSZ_FP), a0) FPREG64_S($f26, SC_FPREGS+((F26-F0)*REGSZ_FP), a0) FPREG64_S($f27, SC_FPREGS+((F27-F0)*REGSZ_FP), a0) FPREG64_S($f28, SC_FPREGS+((F28-F0)*REGSZ_FP), a0) FPREG64_S($f29, SC_FPREGS+((F29-F0)*REGSZ_FP), a0) FPREG64_S($f30, SC_FPREGS+((F30-F0)*REGSZ_FP), a0) FPREG64_S($f31, SC_FPREGS+((F31-F0)*REGSZ_FP), a0) #else swc1 $f20, SC_FPREGS+((F20-F0)*REGSZ_FP)(a0) swc1 $f21, SC_FPREGS+((F21-F0)*REGSZ_FP)(a0) swc1 $f22, SC_FPREGS+((F22-F0)*REGSZ_FP)(a0) swc1 $f23, SC_FPREGS+((F23-F0)*REGSZ_FP)(a0) swc1 $f24, SC_FPREGS+((F24-F0)*REGSZ_FP)(a0) swc1 $f25, SC_FPREGS+((F25-F0)*REGSZ_FP)(a0) swc1 $f26, SC_FPREGS+((F26-F0)*REGSZ_FP)(a0) swc1 $f27, SC_FPREGS+((F27-F0)*REGSZ_FP)(a0) swc1 $f28, SC_FPREGS+((F28-F0)*REGSZ_FP)(a0) swc1 $f29, SC_FPREGS+((F29-F0)*REGSZ_FP)(a0) swc1 $f30, SC_FPREGS+((F30-F0)*REGSZ_FP)(a0) swc1 $f31, SC_FPREGS+((F31-F0)*REGSZ_FP)(a0) #endif REG_S v0, SC_FPREGS+((FSR-F0)*REGSZ)(a0) #endif /* !SOFTFLOAT */ move v0, zero RESTORE_GP64 PTR_ADDU sp, FRAMESZ j ra botch: jal longjmperror jal abort RESTORE_GP64 PTR_ADDU sp, FRAMESZ END(setjmp) LEAF(longjmp, FRAMESZ) PTR_SUBU sp, FRAMESZ SETUP_GP64(GPOFF, longjmp) SAVE_GP(GPOFF) .set reorder sw a1, A1OFF(sp) sw a0, A0OFF(sp) lw a0, SC_MASK(a0) jal sigsetmask lw a0, A0OFF(sp) lw a1, A1OFF(sp) .set noreorder REG_L v0, SC_REGS+ZERO*REGSZ(a0) bne v0, 0xACEDBADE, botch # jump if error REG_L ra, SC_PC(a0) REG_L s0, SC_REGS+S0*REGSZ(a0) REG_L s1, SC_REGS+S1*REGSZ(a0) REG_L s2, SC_REGS+S2*REGSZ(a0) REG_L s3, SC_REGS+S3*REGSZ(a0) REG_L s4, SC_REGS+S4*REGSZ(a0) REG_L s5, SC_REGS+S5*REGSZ(a0) REG_L s6, SC_REGS+S6*REGSZ(a0) REG_L s7, SC_REGS+S7*REGSZ(a0) REG_L s8, SC_REGS+S8*REGSZ(a0) REG_L gp, SC_REGS+GP*REGSZ(a0) REG_L sp, SC_REGS+SP*REGSZ(a0) #if !defined(SOFTFLOAT) REG_L v0, SC_FPREGS+((FSR-F0)*REGSZ)(a0) ctc1 v0, $31 #if _MIPS_FPSET == 32 FPREG64_L($f20, SC_FPREGS+((F20-F0)*REGSZ_FP), a0) FPREG64_L($f21, SC_FPREGS+((F21-F0)*REGSZ_FP), a0) FPREG64_L($f22, SC_FPREGS+((F22-F0)*REGSZ_FP), a0) FPREG64_L($f23, SC_FPREGS+((F23-F0)*REGSZ_FP), a0) FPREG64_L($f24, SC_FPREGS+((F24-F0)*REGSZ_FP), a0) FPREG64_L($f25, SC_FPREGS+((F25-F0)*REGSZ_FP), a0) FPREG64_L($f26, SC_FPREGS+((F26-F0)*REGSZ_FP), a0) FPREG64_L($f27, SC_FPREGS+((F27-F0)*REGSZ_FP), a0) FPREG64_L($f28, SC_FPREGS+((F28-F0)*REGSZ_FP), a0) FPREG64_L($f29, SC_FPREGS+((F29-F0)*REGSZ_FP), a0) FPREG64_L($f30, SC_FPREGS+((F30-F0)*REGSZ_FP), a0) FPREG64_L($f31, SC_FPREGS+((F31-F0)*REGSZ_FP), a0) #else lwc1 $f20, SC_FPREGS+((F20-F0)*REGSZ_FP)(a0) lwc1 $f21, SC_FPREGS+((F21-F0)*REGSZ_FP)(a0) lwc1 $f22, SC_FPREGS+((F22-F0)*REGSZ_FP)(a0) lwc1 $f23, SC_FPREGS+((F23-F0)*REGSZ_FP)(a0) lwc1 $f24, SC_FPREGS+((F24-F0)*REGSZ_FP)(a0) lwc1 $f25, SC_FPREGS+((F25-F0)*REGSZ_FP)(a0) lwc1 $f26, SC_FPREGS+((F26-F0)*REGSZ_FP)(a0) lwc1 $f27, SC_FPREGS+((F27-F0)*REGSZ_FP)(a0) lwc1 $f28, SC_FPREGS+((F28-F0)*REGSZ_FP)(a0) lwc1 $f29, SC_FPREGS+((F29-F0)*REGSZ_FP)(a0) lwc1 $f30, SC_FPREGS+((F30-F0)*REGSZ_FP)(a0) lwc1 $f31, SC_FPREGS+((F31-F0)*REGSZ_FP)(a0) #endif #endif /* !SOFTFLOAT */ bne a1, zero, 1f nop li a1, 1 # never return 0! 1: j ra move v0, a1 END(longjmp)