projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 2b778ceb | 1 | /* Copyright (C) 2001-2021 Free Software Foundation, Inc. |
| 847b055c AJ |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). | |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
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. | |
| 847b055c AJ |
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 | |
| ffeac417 | 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 41bdb6e2 | 13 | Lesser General Public License for more details. |
| 847b055c | 14 | |
| 41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 | 16 | License along with the GNU C Library; if not, see |
| 5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
| 847b055c AJ |
18 | |
| 19 | #include <errno.h> | |
| 20 | #include <sysdep.h> | |
| 21 | #include <setjmp.h> | |
| 22 | #include <bits/setjmp.h> | |
| 23 | #include <stdlib.h> | |
| 24 | #include <unistd.h> | |
| 53244a4e | 25 | #include <stap-probe.h> |
| 847b055c AJ |
26 | |
| 27 | /* Jump to the position specified by ENV, causing the | |
| 28 | setjmp call there to return VAL, or 1 if VAL is 0. */ | |
| 2f438e20 | 29 | void |
| 847b055c AJ |
30 | __longjmp (__jmp_buf env, int val) |
| 31 | { | |
| 00c2b3b9 | 32 | #ifdef PTR_DEMANGLE |
| 7291c56f | 33 | uintptr_t guard = THREAD_GET_POINTER_GUARD (); |
| b8bb339f | 34 | # ifdef CHECK_SP |
| 7291c56f | 35 | CHECK_SP (env, guard); |
| b8bb339f UD |
36 | # endif |
| 37 | #elif defined CHECK_SP | |
| 38 | CHECK_SP (env, 0); | |
| 7291c56f | 39 | #endif |
| 31cf3942 | 40 | register long int r2 __asm__ ("%r2") = val == 0 ? 1 : val; |
| 7291c56f | 41 | #ifdef PTR_DEMANGLE |
| 31cf3942 SL |
42 | register uintptr_t r3 __asm__ ("%r3") = guard; |
| 43 | register void *r1 __asm__ ("%r1") = (void *) env; | |
| 00c2b3b9 UD |
44 | #endif |
| 45 | /* Restore registers and jump back. */ | |
| 31cf3942 SL |
46 | __asm__ __volatile__ ( |
| 47 | /* longjmp probe expects longjmp first argument, second | |
| 48 | argument and target address. */ | |
| 53244a4e | 49 | #ifdef PTR_DEMANGLE |
| 31cf3942 SL |
50 | "lmg %%r4,%%r5,64(%1)\n\t" |
| 51 | "xgr %%r4,%2\n\t" | |
| 52 | "xgr %%r5,%2\n\t" | |
| 53 | LIBC_PROBE_ASM (longjmp, 8@%1 -4@%0 8@%%r4) | |
| 53244a4e | 54 | #else |
| 31cf3942 | 55 | LIBC_PROBE_ASM (longjmp, 8@%1 -4@%0 8@%%r14) |
| 53244a4e SL |
56 | #endif |
| 57 | ||
| 31cf3942 SL |
58 | /* restore fpregs */ |
| 59 | "ld %%f8,80(%1)\n\t" | |
| 60 | "ld %%f9,88(%1)\n\t" | |
| 61 | "ld %%f10,96(%1)\n\t" | |
| 62 | "ld %%f11,104(%1)\n\t" | |
| 63 | "ld %%f12,112(%1)\n\t" | |
| 64 | "ld %%f13,120(%1)\n\t" | |
| 65 | "ld %%f14,128(%1)\n\t" | |
| 66 | "ld %%f15,136(%1)\n\t" | |
| 53244a4e | 67 | |
| 31cf3942 | 68 | /* restore gregs and return to jmp_buf target */ |
| 00c2b3b9 | 69 | #ifdef PTR_DEMANGLE |
| 31cf3942 SL |
70 | "lmg %%r6,%%r13,0(%1)\n\t" |
| 71 | "lgr %%r15,%%r5\n\t" | |
| 72 | LIBC_PROBE_ASM (longjmp_target, 8@%1 -4@%0 8@%%r4) | |
| 73 | "br %%r4" | |
| 305bb37e | 74 | #else |
| 31cf3942 SL |
75 | "lmg %%r6,%%r15,0(%1)\n\t" |
| 76 | LIBC_PROBE_ASM (longjmp_target, 8@%1 -4@%0 8@%%r14) | |
| 77 | "br %%r14" | |
| 305bb37e | 78 | #endif |
| 31cf3942 | 79 | : : "r" (r2), |
| 00c2b3b9 | 80 | #ifdef PTR_DEMANGLE |
| 31cf3942 | 81 | "r" (r1), "r" (r3) |
| 305bb37e | 82 | #else |
| 31cf3942 | 83 | "a" (env) |
| 00c2b3b9 | 84 | #endif |
| 31cf3942 | 85 | ); |
| 847b055c AJ |
86 | |
| 87 | /* Avoid `volatile function does return' warnings. */ | |
| 88 | for (;;); | |
| 89 | } |