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/* Copyright (C) 1992-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Brendan Kehoe (brendan@zen.org).
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#include <setjmp.h>
#include <sgidefs.h>
#include <stdlib.h>
#ifndef __GNUC__
#error This file uses GNU C extensions; you must compile with GCC.
#endif
void
__longjmp (__jmp_buf env_arg, int val_arg)
{
/* gcc 1.39.19 miscompiled the longjmp routine (as it did setjmp before
the hack around it); force it to use $a1 for the longjmp value.
Without this it saves $a1 in a register which gets clobbered
along the way. */
register struct __jmp_buf_internal_tag *env asm ("a0");
register int val asm ("a1");
#ifdef CHECK_SP
register long long sp asm ("$29");
CHECK_SP (env[0].__sp, sp, long long);
#endif
#ifdef __mips_hard_float
/* Pull back the floating point callee-saved registers. */
#if _MIPS_SIM == _ABI64
asm volatile ("l.d $f24, %0" : : "m" (env[0].__fpregs[0]));
asm volatile ("l.d $f25, %0" : : "m" (env[0].__fpregs[1]));
asm volatile ("l.d $f26, %0" : : "m" (env[0].__fpregs[2]));
asm volatile ("l.d $f27, %0" : : "m" (env[0].__fpregs[3]));
asm volatile ("l.d $f28, %0" : : "m" (env[0].__fpregs[4]));
asm volatile ("l.d $f29, %0" : : "m" (env[0].__fpregs[5]));
asm volatile ("l.d $f30, %0" : : "m" (env[0].__fpregs[6]));
asm volatile ("l.d $f31, %0" : : "m" (env[0].__fpregs[7]));
#else
asm volatile ("l.d $f20, %0" : : "m" (env[0].__fpregs[0]));
asm volatile ("l.d $f22, %0" : : "m" (env[0].__fpregs[1]));
asm volatile ("l.d $f24, %0" : : "m" (env[0].__fpregs[2]));
asm volatile ("l.d $f26, %0" : : "m" (env[0].__fpregs[3]));
asm volatile ("l.d $f28, %0" : : "m" (env[0].__fpregs[4]));
asm volatile ("l.d $f30, %0" : : "m" (env[0].__fpregs[5]));
#endif
#endif
/* Get the GP. */
asm volatile ("ld $gp, %0" : : "m" (env[0].__gp));
/* Get the callee-saved registers. */
asm volatile ("ld $16, %0" : : "m" (env[0].__regs[0]));
asm volatile ("ld $17, %0" : : "m" (env[0].__regs[1]));
asm volatile ("ld $18, %0" : : "m" (env[0].__regs[2]));
asm volatile ("ld $19, %0" : : "m" (env[0].__regs[3]));
asm volatile ("ld $20, %0" : : "m" (env[0].__regs[4]));
asm volatile ("ld $21, %0" : : "m" (env[0].__regs[5]));
asm volatile ("ld $22, %0" : : "m" (env[0].__regs[6]));
asm volatile ("ld $23, %0" : : "m" (env[0].__regs[7]));
/* Get the PC. */
asm volatile ("ld $31, %0" : : "m" (env[0].__pc));
/* Restore the stack pointer and the FP. They have to be restored
last and in a single asm as gcc, depending on options used, may
use either of them to access env. */
asm volatile ("ld $29, %0\n\t"
"ld $30, %1\n\t" : : "m" (env[0].__sp), "m" (env[0].__fp));
/* Give setjmp 1 if given a 0, or what they gave us if non-zero. */
if (val == 0)
asm volatile ("dli $2, 1");
else
asm volatile ("move $2, %0" : : "r" (val));
asm volatile ("j $31");
/* Avoid `volatile function does return' warnings. */
for (;;);
}
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