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/* $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 <private/bionic_asm.h>
#include <machine/regnum.h>
#include <machine/signal.h>
/*
* 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
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
s.d $f20, SC_FPREGS+((F20-F0)*REGSZ_FP)(a0)
s.d $f22, SC_FPREGS+((F22-F0)*REGSZ_FP)(a0)
s.d $f24, SC_FPREGS+((F24-F0)*REGSZ_FP)(a0)
s.d $f26, SC_FPREGS+((F26-F0)*REGSZ_FP)(a0)
s.d $f28, SC_FPREGS+((F28-F0)*REGSZ_FP)(a0)
s.d $f30, SC_FPREGS+((F30-F0)*REGSZ_FP)(a0)
#if _MIPS_FPSET == 32
s.d $f21, SC_FPREGS+((F21-F0)*REGSZ_FP)(a0)
s.d $f23, SC_FPREGS+((F23-F0)*REGSZ_FP)(a0)
s.d $f25, SC_FPREGS+((F25-F0)*REGSZ_FP)(a0)
s.d $f27, SC_FPREGS+((F27-F0)*REGSZ_FP)(a0)
s.d $f29, SC_FPREGS+((F29-F0)*REGSZ_FP)(a0)
s.d $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
l.d $f20, SC_FPREGS+((F20-F0)*REGSZ_FP)(a0)
l.d $f22, SC_FPREGS+((F22-F0)*REGSZ_FP)(a0)
l.d $f24, SC_FPREGS+((F24-F0)*REGSZ_FP)(a0)
l.d $f26, SC_FPREGS+((F26-F0)*REGSZ_FP)(a0)
l.d $f28, SC_FPREGS+((F28-F0)*REGSZ_FP)(a0)
l.d $f30, SC_FPREGS+((F30-F0)*REGSZ_FP)(a0)
#if _MIPS_FPSET == 32
l.d $f21, SC_FPREGS+((F21-F0)*REGSZ_FP)(a0)
l.d $f23, SC_FPREGS+((F23-F0)*REGSZ_FP)(a0)
l.d $f25, SC_FPREGS+((F25-F0)*REGSZ_FP)(a0)
l.d $f27, SC_FPREGS+((F27-F0)*REGSZ_FP)(a0)
l.d $f29, SC_FPREGS+((F29-F0)*REGSZ_FP)(a0)
l.d $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)
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