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69 lines
2.9 KiB
C
69 lines
2.9 KiB
C
/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<https://www.gnu.org/licenses/>. */
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#include <setjmp.h>
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/* This function is only called via the assembly language routine
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__sigsetjmp, which arranges to pass in the stack pointer and the frame
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pointer. We do things this way because it's difficult to reliably
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access them in C. */
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/* Stack protection is disabled to avoid changing s0 (or any other
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caller-save register) before storing it to environment.
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See BZ #22624. */
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int __attribute__ ((nomips16))
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inhibit_stack_protector
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__sigsetjmp_aux (jmp_buf env, int savemask, int sp, int fp)
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{
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#ifdef __mips_hard_float
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/* Store the floating point callee-saved registers... */
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asm volatile ("s.d $f20, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[0]));
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asm volatile ("s.d $f22, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[1]));
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asm volatile ("s.d $f24, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[2]));
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asm volatile ("s.d $f26, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[3]));
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asm volatile ("s.d $f28, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[4]));
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asm volatile ("s.d $f30, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[5]));
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#endif
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/* .. and the PC; */
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asm volatile ("sw $31, %0" : : "m" (env[0].__jmpbuf[0].__pc));
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/* .. and the stack pointer; */
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env[0].__jmpbuf[0].__sp = (void *) sp;
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/* .. and the FP; it'll be in s8. */
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env[0].__jmpbuf[0].__fp = (void *) fp;
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/* .. and the GP; */
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asm volatile ("sw $gp, %0" : : "m" (env[0].__jmpbuf[0].__gp));
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/* .. and the callee-saved registers; */
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asm volatile ("sw $16, %0" : : "m" (env[0].__jmpbuf[0].__regs[0]));
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asm volatile ("sw $17, %0" : : "m" (env[0].__jmpbuf[0].__regs[1]));
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asm volatile ("sw $18, %0" : : "m" (env[0].__jmpbuf[0].__regs[2]));
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asm volatile ("sw $19, %0" : : "m" (env[0].__jmpbuf[0].__regs[3]));
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asm volatile ("sw $20, %0" : : "m" (env[0].__jmpbuf[0].__regs[4]));
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asm volatile ("sw $21, %0" : : "m" (env[0].__jmpbuf[0].__regs[5]));
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asm volatile ("sw $22, %0" : : "m" (env[0].__jmpbuf[0].__regs[6]));
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asm volatile ("sw $23, %0" : : "m" (env[0].__jmpbuf[0].__regs[7]));
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/* Save the signal mask if requested. */
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return __sigjmp_save (env, savemask);
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}
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