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83 lines
2.9 KiB
C
83 lines
2.9 KiB
C
/* Copyright (C) 1992 Free Software Foundation, Inc.
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Contributed by Brendan Kehoe (brendan@zen.org).
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <setjmp.h>
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#include <stdlib.h>
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#undef __longjmp
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#ifndef __GNUC__
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#error This file uses GNU C extensions; you must compile with GCC.
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#endif
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__NORETURN
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void
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DEFUN(__longjmp, (env, val_arg), CONST __jmp_buf env AND int val_arg)
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{
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/* gcc 1.39.19 miscompiled the longjmp routine (as it did setjmp before
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the hack around it); force it to use $a1 for the longjmp value.
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Without this it saves $a1 in a register which gets clobbered
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along the way. */
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register int val asm ("a1");
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/* Pull back the floating point callee-saved registers. */
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asm volatile ("l.d $f20, %0" : : "m" (env[0].__fpregs[0]));
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asm volatile ("l.d $f22, %0" : : "m" (env[0].__fpregs[1]));
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asm volatile ("l.d $f24, %0" : : "m" (env[0].__fpregs[2]));
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asm volatile ("l.d $f26, %0" : : "m" (env[0].__fpregs[3]));
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asm volatile ("l.d $f28, %0" : : "m" (env[0].__fpregs[4]));
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asm volatile ("l.d $f30, %0" : : "m" (env[0].__fpregs[5]));
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/* Restore the stack pointer. */
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asm volatile ("lw $29, %0" : : "m" (env[0].__sp));
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/* Get and reconstruct the floating point csr. */
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asm volatile ("lw $2, %0" : : "m" (env[0].__fpc_csr));
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asm volatile ("ctc1 $2, $31");
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/* Get the FP. */
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asm volatile ("lw $30, %0" : : "m" (env[0].__fp));
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/* Get the GP. */
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asm volatile ("lw $gp, %0" : : "m" (env[0].__gp));
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/* Get the callee-saved registers. */
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asm volatile ("lw $16, %0" : : "m" (env[0].__regs[0]));
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asm volatile ("lw $17, %0" : : "m" (env[0].__regs[1]));
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asm volatile ("lw $18, %0" : : "m" (env[0].__regs[2]));
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asm volatile ("lw $19, %0" : : "m" (env[0].__regs[3]));
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asm volatile ("lw $20, %0" : : "m" (env[0].__regs[4]));
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asm volatile ("lw $21, %0" : : "m" (env[0].__regs[5]));
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asm volatile ("lw $22, %0" : : "m" (env[0].__regs[6]));
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asm volatile ("lw $23, %0" : : "m" (env[0].__regs[7]));
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/* Get the PC. */
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asm volatile ("lw $31, %0" : : "m" (env[0].__pc));
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/* Give setjmp 1 if given a 0, or what they gave us if non-zero. */
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if (val == 0)
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asm volatile ("li $2, 1");
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else
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asm volatile ("move $2, %0" : : "r" (val));
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asm volatile ("j $31");
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abort ();
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}
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