1 | /* Copyright (C) 1996-2022 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library. If not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <setjmp.h> |
19 | |
20 | /* This function is only called via the assembly language routine |
21 | __sigsetjmp, which arranges to pass in the stack pointer and the frame |
22 | pointer. We do things this way because it's difficult to reliably |
23 | access them in C. */ |
24 | |
25 | /* Stack protection is disabled to avoid changing s0 (or any other |
26 | caller-save register) before storing it to environment. |
27 | See BZ #22624. */ |
28 | |
29 | int __attribute__ ((nomips16)) |
30 | inhibit_stack_protector |
31 | __sigsetjmp_aux (jmp_buf env, int savemask, int sp, int fp) |
32 | { |
33 | #ifdef __mips_hard_float |
34 | /* Store the floating point callee-saved registers... */ |
35 | asm volatile ("s.d $f20, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[0])); |
36 | asm volatile ("s.d $f22, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[1])); |
37 | asm volatile ("s.d $f24, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[2])); |
38 | asm volatile ("s.d $f26, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[3])); |
39 | asm volatile ("s.d $f28, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[4])); |
40 | asm volatile ("s.d $f30, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[5])); |
41 | #endif |
42 | |
43 | /* .. and the PC; */ |
44 | asm volatile ("sw $31, %0" : : "m" (env[0].__jmpbuf[0].__pc)); |
45 | |
46 | /* .. and the stack pointer; */ |
47 | env[0].__jmpbuf[0].__sp = (void *) sp; |
48 | |
49 | /* .. and the FP; it'll be in s8. */ |
50 | env[0].__jmpbuf[0].__fp = (void *) fp; |
51 | |
52 | /* .. and the GP; */ |
53 | asm volatile ("sw $gp, %0" : : "m" (env[0].__jmpbuf[0].__gp)); |
54 | |
55 | /* .. and the callee-saved registers; */ |
56 | asm volatile ("sw $16, %0" : : "m" (env[0].__jmpbuf[0].__regs[0])); |
57 | asm volatile ("sw $17, %0" : : "m" (env[0].__jmpbuf[0].__regs[1])); |
58 | asm volatile ("sw $18, %0" : : "m" (env[0].__jmpbuf[0].__regs[2])); |
59 | asm volatile ("sw $19, %0" : : "m" (env[0].__jmpbuf[0].__regs[3])); |
60 | asm volatile ("sw $20, %0" : : "m" (env[0].__jmpbuf[0].__regs[4])); |
61 | asm volatile ("sw $21, %0" : : "m" (env[0].__jmpbuf[0].__regs[5])); |
62 | asm volatile ("sw $22, %0" : : "m" (env[0].__jmpbuf[0].__regs[6])); |
63 | asm volatile ("sw $23, %0" : : "m" (env[0].__jmpbuf[0].__regs[7])); |
64 | |
65 | /* Save the signal mask if requested. */ |
66 | return __sigjmp_save (env: env, savemask: savemask); |
67 | } |
68 | |