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b168057a | 1 | /* Copyright (C) 2001-2015 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 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://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 AS |
39 | #endif |
40 | register long int r2 __asm ("%r2") = val == 0 ? 1 : val; | |
41 | #ifdef PTR_DEMANGLE | |
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. */ | |
53244a4e SL |
46 | asm volatile ( |
47 | /* longjmp probe expects longjmp first argument, second | |
48 | argument and target address. */ | |
49 | #ifdef PTR_DEMANGLE | |
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) | |
54 | #else | |
55 | LIBC_PROBE_ASM (longjmp, 8@%1 -4@%0 8@%%r14) | |
56 | #endif | |
57 | ||
58 | /* restore fpregs */ | |
59 | "ld %%f8,80(%1)\n\t" | |
bc101e26 AK |
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 SL |
67 | |
68 | /* restore gregs and return to jmp_buf target */ | |
00c2b3b9 | 69 | #ifdef PTR_DEMANGLE |
305bb37e | 70 | "lmg %%r6,%%r13,0(%1)\n\t" |
305bb37e | 71 | "lgr %%r15,%%r5\n\t" |
53244a4e | 72 | LIBC_PROBE_ASM (longjmp_target, 8@%1 -4@%0 8@%%r4) |
305bb37e UD |
73 | "br %%r4" |
74 | #else | |
75 | "lmg %%r6,%%r15,0(%1)\n\t" | |
53244a4e | 76 | LIBC_PROBE_ASM (longjmp_target, 8@%1 -4@%0 8@%%r14) |
00c2b3b9 | 77 | "br %%r14" |
305bb37e UD |
78 | #endif |
79 | : : "r" (r2), | |
00c2b3b9 | 80 | #ifdef PTR_DEMANGLE |
305bb37e UD |
81 | "r" (r1), "r" (r3) |
82 | #else | |
83 | "a" (env) | |
00c2b3b9 | 84 | #endif |
305bb37e | 85 | ); |
847b055c AJ |
86 | |
87 | /* Avoid `volatile function does return' warnings. */ | |
88 | for (;;); | |
89 | } |