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- /* Copyright (C) 1992 Free Software Foundation, Inc.
- 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 Library General Public License as
- published by the Free Software Foundation; either version 2 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <ansidecl.h>
- #include <setjmp.h>
- #include <stdlib.h>
-
- #undef __longjmp
-
- #ifndef __GNUC__
- #error This file uses GNU C extensions; you must compile with GCC.
- #endif
-
- __NORETURN
- void
- DEFUN(__longjmp, (env, val_arg), CONST __jmp_buf env AND 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 int val asm ("a1");
-
- /* Pull back the floating point callee-saved registers. */
- 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]));
-
- /* Restore the stack pointer. */
- asm volatile ("lw $29, %0" : : "m" (env[0].__sp));
-
- /* Get and reconstruct the floating point csr. */
- asm volatile ("lw $2, %0" : : "m" (env[0].__fpc_csr));
- asm volatile ("ctc1 $2, $31");
-
- /* Get the FP. */
- asm volatile ("lw $30, %0" : : "m" (env[0].__fp));
-
- /* Get the GP. */
- asm volatile ("lw $gp, %0" : : "m" (env[0].__gp));
-
- /* Get the callee-saved registers. */
- asm volatile ("lw $16, %0" : : "m" (env[0].__regs[0]));
- asm volatile ("lw $17, %0" : : "m" (env[0].__regs[1]));
- asm volatile ("lw $18, %0" : : "m" (env[0].__regs[2]));
- asm volatile ("lw $19, %0" : : "m" (env[0].__regs[3]));
- asm volatile ("lw $20, %0" : : "m" (env[0].__regs[4]));
- asm volatile ("lw $21, %0" : : "m" (env[0].__regs[5]));
- asm volatile ("lw $22, %0" : : "m" (env[0].__regs[6]));
- asm volatile ("lw $23, %0" : : "m" (env[0].__regs[7]));
-
- /* Get the PC. */
- asm volatile ("lw $31, %0" : : "m" (env[0].__pc));
-
- /* Give setjmp 1 if given a 0, or what they gave us if non-zero. */
- if (val == 0)
- asm volatile ("li $2, 1");
- else
- asm volatile ("move $2, %0" : : "r" (val));
-
- asm volatile ("j $31");
-
- abort ();
- }
-