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1 | /* Copyright (C) 1996, 1997 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. | |
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3 | Contributed by Brendan Kehoe (brendan@zen.org). |
4 | ||
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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. | |
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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. | |
28f540f4 | 14 | |
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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. */ | |
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19 | |
20 | #include <setjmp.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, int sp, int fp) | |
29 | { | |
30 | /* Store the floating point callee-saved registers... */ | |
31 | asm volatile ("s.d $f20, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[0])); | |
32 | asm volatile ("s.d $f22, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[1])); | |
33 | asm volatile ("s.d $f24, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[2])); | |
34 | asm volatile ("s.d $f26, %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 $f30, %0" : : "m" (env[0].__jmpbuf[0].__fpregs[5])); | |
37 | ||
38 | /* .. and the PC; */ | |
39 | asm volatile ("sw $31, %0" : : "m" (env[0].__jmpbuf[0].__pc)); | |
40 | ||
41 | /* .. and the stack pointer; */ | |
42 | env[0].__jmpbuf[0].__sp = sp; | |
43 | ||
44 | /* .. and the FP; it'll be in s8. */ | |
45 | env[0].__jmpbuf[0].__fp = fp; | |
46 | ||
47 | /* .. and the GP; */ | |
48 | asm volatile ("sw $gp, %0" : : "m" (env[0].__jmpbuf[0].__gp)); | |
49 | ||
50 | /* .. and the callee-saved registers; */ | |
51 | asm volatile ("sw $16, %0" : : "m" (env[0].__jmpbuf[0].__regs[0])); | |
52 | asm volatile ("sw $17, %0" : : "m" (env[0].__jmpbuf[0].__regs[1])); | |
53 | asm volatile ("sw $18, %0" : : "m" (env[0].__jmpbuf[0].__regs[2])); | |
54 | asm volatile ("sw $19, %0" : : "m" (env[0].__jmpbuf[0].__regs[3])); | |
55 | asm volatile ("sw $20, %0" : : "m" (env[0].__jmpbuf[0].__regs[4])); | |
56 | asm volatile ("sw $21, %0" : : "m" (env[0].__jmpbuf[0].__regs[5])); | |
57 | asm volatile ("sw $22, %0" : : "m" (env[0].__jmpbuf[0].__regs[6])); | |
58 | asm volatile ("sw $23, %0" : : "m" (env[0].__jmpbuf[0].__regs[7])); | |
59 | ||
60 | /* .. and finally get and reconstruct the floating point csr. */ | |
61 | asm ("cfc1 %0, $31" : "=r" (env[0].__jmpbuf[0].__fpc_csr)); | |
62 | ||
63 | /* Save the signal mask if requested. */ | |
64 | return __sigjmp_save (env, savemask); | |
65 | } |