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/* Copyright (C) 1996-2019 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>
/* This function is only called via the assembly language routine
__sigsetjmp, which arranges to pass in the stack pointer and the frame
pointer. We do things this way because it's difficult to reliably
access them in C. */
/* Stack protection is disabled to avoid changing s0 (or any other
caller-save register) before storing it to environment.
See BZ #22624. */
int __attribute__ ((nomips16))
inhibit_stack_protector
__sigsetjmp_aux (jmp_buf env, int savemask, int sp, int fp)
{
#ifdef __mips_hard_float
/* Store the floating point callee-saved registers... */
asm volatile ("s.d $f20, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[0]));
asm volatile ("s.d $f22, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[1]));
asm volatile ("s.d $f24, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[2]));
asm volatile ("s.d $f26, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[3]));
asm volatile ("s.d $f28, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[4]));
asm volatile ("s.d $f30, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[5]));
#endif
/* .. and the PC; */
asm volatile ("sw $31, %0" : : "m" (env[0].__jmpbuf[0].__pc));
/* .. and the stack pointer; */
env[0].__jmpbuf[0].__sp = (void *) sp;
/* .. and the FP; it'll be in s8. */
env[0].__jmpbuf[0].__fp = (void *) fp;
/* .. and the GP; */
asm volatile ("sw $gp, %0" : : "m" (env[0].__jmpbuf[0].__gp));
/* .. and the callee-saved registers; */
asm volatile ("sw $16, %0" : : "m" (env[0].__jmpbuf[0].__regs[0]));
asm volatile ("sw $17, %0" : : "m" (env[0].__jmpbuf[0].__regs[1]));
asm volatile ("sw $18, %0" : : "m" (env[0].__jmpbuf[0].__regs[2]));
asm volatile ("sw $19, %0" : : "m" (env[0].__jmpbuf[0].__regs[3]));
asm volatile ("sw $20, %0" : : "m" (env[0].__jmpbuf[0].__regs[4]));
asm volatile ("sw $21, %0" : : "m" (env[0].__jmpbuf[0].__regs[5]));
asm volatile ("sw $22, %0" : : "m" (env[0].__jmpbuf[0].__regs[6]));
asm volatile ("sw $23, %0" : : "m" (env[0].__jmpbuf[0].__regs[7]));
/* Save the signal mask if requested. */
return __sigjmp_save (env, savemask);
}
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