diff options
Diffstat (limited to 'sysdeps/mips/setjmp_aux.c')
| -rw-r--r-- | sysdeps/mips/setjmp_aux.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/sysdeps/mips/setjmp_aux.c b/sysdeps/mips/setjmp_aux.c new file mode 100644 index 0000000000..d478e3fdc9 --- /dev/null +++ b/sysdeps/mips/setjmp_aux.c @@ -0,0 +1,64 @@ +/* Copyright (C) 1992, 1994, 1995 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 <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. */ + +int +__sigsetjmp_aux (jmp_buf env, int savemask, int sp, int fp) +{ + /* 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])); + + /* .. and the PC; */ + asm volatile ("sw $31, %0" : : "m" (env[0].__jmpbuf[0].__pc)); + + /* .. and the stack pointer; */ + env[0].__jmpbuf[0].__sp = sp; + + /* .. and the FP; it'll be in s8. */ + env[0].__jmpbuf[0].__fp = 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])); + + /* .. and finally get and reconstruct the floating point csr. */ + asm ("cfc1 %0, $31" : "=r" (env[0].__jmpbuf[0].__fpc_csr)); + + /* Save the signal mask if requested. */ + return __sigjmp_save (env, savemask); +} |