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