1 /* Copyright (C) 1996, 1997, 2000 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 <features.h>
20 #include <setjmp.h>
21 #include <sgidefs.h>
22 #include <sys/asm.h>
23 
24 /* This function is only called via the assembly language routine
25    __sigsetjmp, which arranges to pass in the stack pointer and the frame
26    pointer.  We do things this way because it's difficult to reliably
27    access them in C.  */
28 
29 int
30 #if _MIPS_SIM == _MIPS_SIM_ABI64
__sigsetjmp_aux(jmp_buf env,int savemask,long long sp,long long fp,long long gp)31 __sigsetjmp_aux (jmp_buf env, int savemask, long long sp, long long fp, long long gp)
32 #else /* O32 || N32 */
33 __sigsetjmp_aux (jmp_buf env, int savemask, int sp, int fp)
34 #endif /* O32 || N32 */
35 {
36 #if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__
37   /* Store the floating point callee-saved registers...  */
38 #if _MIPS_SIM == _MIPS_SIM_ABI64
39   __asm__ __volatile__ ("s.d $f24, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[0]));
40   __asm__ __volatile__ ("s.d $f25, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[1]));
41   __asm__ __volatile__ ("s.d $f26, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[2]));
42   __asm__ __volatile__ ("s.d $f27, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[3]));
43   __asm__ __volatile__ ("s.d $f28, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[4]));
44   __asm__ __volatile__ ("s.d $f29, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[5]));
45   __asm__ __volatile__ ("s.d $f30, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[6]));
46   __asm__ __volatile__ ("s.d $f31, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[7]));
47 #else /* O32 || N32 */
48   __asm__ __volatile__ ("s.d $f20, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[0]));
49   __asm__ __volatile__ ("s.d $f22, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[1]));
50   __asm__ __volatile__ ("s.d $f24, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[2]));
51   __asm__ __volatile__ ("s.d $f26, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[3]));
52   __asm__ __volatile__ ("s.d $f28, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[4]));
53   __asm__ __volatile__ ("s.d $f30, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[5]));
54 #endif /* O32 || N32 */
55 #endif
56 
57   /* .. and the PC;  */
58 #if _MIPS_SIM == _MIPS_SIM_ABI64
59   __asm__ __volatile__ ("sd $31, %0" : : "m" (env[0].__jmpbuf[0].__pc));
60 #else
61   __asm__ __volatile__ ("sw $31, %0" : : "m" (env[0].__jmpbuf[0].__pc));
62 #endif
63 
64   /* .. and the stack pointer;  */
65   env[0].__jmpbuf[0].__sp = (__ptr_size) sp;
66 
67   /* .. and the FP; it'll be in s8. */
68   env[0].__jmpbuf[0].__fp = (__ptr_size) fp;
69 
70   /* .. and the GP; */
71 #if _MIPS_SIM == _MIPS_SIM_ABI64
72   env[0].__jmpbuf[0].__gp = (__ptr_size) gp;
73 #else
74   __asm__ __volatile__ ("sw $gp, %0" : : "m" (env[0].__jmpbuf[0].__gp));
75 #endif
76 
77   /* .. and the callee-saved registers; */
78 #if (_MIPS_SIM == _MIPS_SIM_ABI32)
79   __asm__ __volatile__ ("sw $16, %0" : : "m" (env[0].__jmpbuf[0].__regs[0]));
80   __asm__ __volatile__ ("sw $17, %0" : : "m" (env[0].__jmpbuf[0].__regs[1]));
81   __asm__ __volatile__ ("sw $18, %0" : : "m" (env[0].__jmpbuf[0].__regs[2]));
82   __asm__ __volatile__ ("sw $19, %0" : : "m" (env[0].__jmpbuf[0].__regs[3]));
83   __asm__ __volatile__ ("sw $20, %0" : : "m" (env[0].__jmpbuf[0].__regs[4]));
84   __asm__ __volatile__ ("sw $21, %0" : : "m" (env[0].__jmpbuf[0].__regs[5]));
85   __asm__ __volatile__ ("sw $22, %0" : : "m" (env[0].__jmpbuf[0].__regs[6]));
86   __asm__ __volatile__ ("sw $23, %0" : : "m" (env[0].__jmpbuf[0].__regs[7]));
87 #else	/* N32 || N64 */
88   __asm__ __volatile__ ("sd $16, %0" : : "m" (env[0].__jmpbuf[0].__regs[0]));
89   __asm__ __volatile__ ("sd $17, %0" : : "m" (env[0].__jmpbuf[0].__regs[1]));
90   __asm__ __volatile__ ("sd $18, %0" : : "m" (env[0].__jmpbuf[0].__regs[2]));
91   __asm__ __volatile__ ("sd $19, %0" : : "m" (env[0].__jmpbuf[0].__regs[3]));
92   __asm__ __volatile__ ("sd $20, %0" : : "m" (env[0].__jmpbuf[0].__regs[4]));
93   __asm__ __volatile__ ("sd $21, %0" : : "m" (env[0].__jmpbuf[0].__regs[5]));
94   __asm__ __volatile__ ("sd $22, %0" : : "m" (env[0].__jmpbuf[0].__regs[6]));
95   __asm__ __volatile__ ("sd $23, %0" : : "m" (env[0].__jmpbuf[0].__regs[7]));
96 #endif	/* N32 || N64 */
97 
98 #if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__
99   /* .. and finally get and reconstruct the floating point csr.  */
100   __asm__ ("cfc1 %0, $31" : "=r" (env[0].__jmpbuf[0].__fpc_csr));
101 #endif
102 
103   /* Save the signal mask if requested.  */
104   return __sigjmp_save (env, savemask);
105 }
106