1 /* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Brendan Kehoe (brendan@zen.org).
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
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 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
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
28 __sigsetjmp_aux (jmp_buf env, int savemask, int sp, int fp)
30 /* Store the floating point callee-saved registers... */
31 asm volatile ("s.d $f24, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[0]));
32 asm volatile ("s.d $f25, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[1]));
33 asm volatile ("s.d $f26, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[2]));
34 asm volatile ("s.d $f27, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[3]));
35 asm volatile ("s.d $f28, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[4]));
36 asm volatile ("s.d $f29, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[5]));
37 asm volatile ("s.d $f30, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[6]));
38 asm volatile ("s.d $f31, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[7]));
41 asm volatile ("sd $31, %0" : : "m" (env[0].__jmpbuf[0].__pc));
43 /* .. and the stack pointer; */
44 env[0].__jmpbuf[0].__sp = sp;
46 /* .. and the FP; it'll be in s8. */
47 env[0].__jmpbuf[0].__fp = fp;
50 asm volatile ("sd $gp, %0" : : "m" (env[0].__jmpbuf[0].__gp));
52 /* .. and the callee-saved registers; */
53 asm volatile ("sd $16, %0" : : "m" (env[0].__jmpbuf[0].__regs[0]));
54 asm volatile ("sd $17, %0" : : "m" (env[0].__jmpbuf[0].__regs[1]));
55 asm volatile ("sd $18, %0" : : "m" (env[0].__jmpbuf[0].__regs[2]));
56 asm volatile ("sd $19, %0" : : "m" (env[0].__jmpbuf[0].__regs[3]));
57 asm volatile ("sd $20, %0" : : "m" (env[0].__jmpbuf[0].__regs[4]));
58 asm volatile ("sd $21, %0" : : "m" (env[0].__jmpbuf[0].__regs[5]));
59 asm volatile ("sd $22, %0" : : "m" (env[0].__jmpbuf[0].__regs[6]));
60 asm volatile ("sd $23, %0" : : "m" (env[0].__jmpbuf[0].__regs[7]));
62 /* .. and finally get and reconstruct the floating point csr. */
63 asm ("cfc1 %0, $31" : "=r" (env[0].__jmpbuf[0].__fpc_csr));
65 /* Save the signal mask if requested. */
66 return __sigjmp_save (env, savemask);