ports/sysdeps/mips/mips64/setjmp_aux.c

   1 /* Copyright (C) 1996-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Brendan Kehoe (brendan@zen.org).
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <setjmp.h>
  20 #include <sgidefs.h>
  21
  22 /* This function is only called via the assembly language routine
  23    __sigsetjmp, which arranges to pass in the stack pointer and the frame
  24    pointer.  We do things this way because it's difficult to reliably
  25    access them in C.  */
  26
  27 int
  28 __sigsetjmp_aux (jmp_buf env, int savemask, long long sp, long long fp,
  29                  long long gp)
  30 {
  31 #ifdef __mips_hard_float
  32   /* Store the floating point callee-saved registers...  */
  33 #if _MIPS_SIM == _ABI64
  34   asm volatile ("s.d $f24, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[0]));
  35   asm volatile ("s.d $f25, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[1]));
  36   asm volatile ("s.d $f26, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[2]));
  37   asm volatile ("s.d $f27, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[3]));
  38   asm volatile ("s.d $f28, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[4]));
  39   asm volatile ("s.d $f29, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[5]));
  40   asm volatile ("s.d $f30, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[6]));
  41   asm volatile ("s.d $f31, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[7]));
  42 #else
  43   asm volatile ("s.d $f20, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[0]));
  44   asm volatile ("s.d $f22, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[1]));
  45   asm volatile ("s.d $f24, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[2]));
  46   asm volatile ("s.d $f26, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[3]));
  47   asm volatile ("s.d $f28, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[4]));
  48   asm volatile ("s.d $f30, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[5]));
  49 #endif
  50 #endif
  51
  52   /* .. and the PC;  */
  53   asm volatile ("sd $31, %0" : : "m" (env[0].__jmpbuf[0].__pc));
  54
  55   /* .. and the stack pointer;  */
  56   env[0].__jmpbuf[0].__sp = sp;
  57
  58   /* .. and the FP; it'll be in s8. */
  59   env[0].__jmpbuf[0].__fp = fp;
  60
  61   /* .. and the GP; */
  62   env[0].__jmpbuf[0].__gp = gp;
  63
  64   /* .. and the callee-saved registers; */
  65   asm volatile ("sd $16, %0" : : "m" (env[0].__jmpbuf[0].__regs[0]));
  66   asm volatile ("sd $17, %0" : : "m" (env[0].__jmpbuf[0].__regs[1]));
  67   asm volatile ("sd $18, %0" : : "m" (env[0].__jmpbuf[0].__regs[2]));
  68   asm volatile ("sd $19, %0" : : "m" (env[0].__jmpbuf[0].__regs[3]));
  69   asm volatile ("sd $20, %0" : : "m" (env[0].__jmpbuf[0].__regs[4]));
  70   asm volatile ("sd $21, %0" : : "m" (env[0].__jmpbuf[0].__regs[5]));
  71   asm volatile ("sd $22, %0" : : "m" (env[0].__jmpbuf[0].__regs[6]));
  72   asm volatile ("sd $23, %0" : : "m" (env[0].__jmpbuf[0].__regs[7]));
  73
  74   /* Save the signal mask if requested.  */
  75   return __sigjmp_save (env, savemask);
  76 }