| xf.li | bfc6e71 | 2025-02-07 01:54:34 -0800 | [diff] [blame^] | 1 | /* Copyright (C) 1992-2016 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 <setjmp.h> |
| 20 | #include <stdlib.h> |
| 21 | |
| 22 | #ifndef __GNUC__ |
| 23 | #error This file uses GNU C extensions; you must compile with GCC. |
| 24 | #endif |
| 25 | |
| 26 | static void __attribute__ ((nomips16)) |
| 27 | ____longjmp (__jmp_buf env_arg, int val_arg) |
| 28 | { |
| 29 | /* gcc 1.39.19 miscompiled the longjmp routine (as it did setjmp before |
| 30 | the hack around it); force it to use $a1 for the longjmp value. |
| 31 | Without this it saves $a1 in a register which gets clobbered |
| 32 | along the way. */ |
| 33 | register struct __jmp_buf_internal_tag *env asm ("a0"); |
| 34 | register int val asm ("a1"); |
| 35 | #ifdef CHECK_SP |
| 36 | register long sp asm ("$29"); |
| 37 | CHECK_SP (env[0].__sp, sp, long); |
| 38 | #endif |
| 39 | |
| 40 | #ifdef __mips_hard_float |
| 41 | /* Pull back the floating point callee-saved registers. */ |
| 42 | asm volatile ("l.d $f20, %0" : : "m" (env[0].__fpregs[0])); |
| 43 | asm volatile ("l.d $f22, %0" : : "m" (env[0].__fpregs[1])); |
| 44 | asm volatile ("l.d $f24, %0" : : "m" (env[0].__fpregs[2])); |
| 45 | asm volatile ("l.d $f26, %0" : : "m" (env[0].__fpregs[3])); |
| 46 | asm volatile ("l.d $f28, %0" : : "m" (env[0].__fpregs[4])); |
| 47 | asm volatile ("l.d $f30, %0" : : "m" (env[0].__fpregs[5])); |
| 48 | #endif |
| 49 | |
| 50 | /* Get the GP. */ |
| 51 | asm volatile ("lw $gp, %0" : : "m" (env[0].__gp)); |
| 52 | |
| 53 | /* Get the callee-saved registers. */ |
| 54 | asm volatile ("lw $16, %0" : : "m" (env[0].__regs[0])); |
| 55 | asm volatile ("lw $17, %0" : : "m" (env[0].__regs[1])); |
| 56 | asm volatile ("lw $18, %0" : : "m" (env[0].__regs[2])); |
| 57 | asm volatile ("lw $19, %0" : : "m" (env[0].__regs[3])); |
| 58 | asm volatile ("lw $20, %0" : : "m" (env[0].__regs[4])); |
| 59 | asm volatile ("lw $21, %0" : : "m" (env[0].__regs[5])); |
| 60 | asm volatile ("lw $22, %0" : : "m" (env[0].__regs[6])); |
| 61 | asm volatile ("lw $23, %0" : : "m" (env[0].__regs[7])); |
| 62 | |
| 63 | /* Get the PC. */ |
| 64 | asm volatile ("lw $25, %0" : : "m" (env[0].__pc)); |
| 65 | |
| 66 | /* Restore the stack pointer and the FP. They have to be restored |
| 67 | last and in a single asm as gcc, depending on options used, may |
| 68 | use either of them to access env. */ |
| 69 | asm volatile ("lw $29, %0\n\t" |
| 70 | "lw $30, %1\n\t" : : "m" (env[0].__sp), "m" (env[0].__fp)); |
| 71 | |
| 72 | /* Give setjmp 1 if given a 0, or what they gave us if non-zero. */ |
| 73 | if (val == 0) |
| 74 | asm volatile ("li $2, 1"); |
| 75 | else |
| 76 | asm volatile ("move $2, %0" : : "r" (val)); |
| 77 | |
| 78 | asm volatile ("jr $25"); |
| 79 | |
| 80 | /* Avoid `volatile function does return' warnings. */ |
| 81 | for (;;); |
| 82 | } |
| 83 | |
| 84 | strong_alias (____longjmp, __longjmp); |