1 /* Copyright (C) 2000-2015 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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.
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.
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/>. */
22 #include <bits/setjmp.h>
25 #include <stap-probe.h>
27 /* Jump to the position specified by ENV, causing the
28 setjmp call there to return VAL, or 1 if VAL is 0. */
30 __longjmp (__jmp_buf env
, int val
)
33 uintptr_t guard
= THREAD_GET_POINTER_GUARD ();
35 CHECK_SP (env
, guard
);
37 #elif defined CHECK_SP
40 register int r2
__asm ("%r2") = val
== 0 ? 1 : val
;
42 register uintptr_t r3
__asm ("%r3") = guard
;
43 register void *r1
__asm ("%r1") = (void *) env
;
45 /* Restore registers and jump back. */
47 /* longjmp probe expects longjmp first argument, second
48 argument and target address. */
50 "lm %%r4,%%r5,32(%1)\n\t"
53 LIBC_PROBE_ASM (longjmp
, 4@
%1 -4@
%0 4@
%%r4
)
55 LIBC_PROBE_ASM (longjmp
, 4@
%1 -4@
%0 4@
%%r14
)
62 /* restore gregs and return to jmp_buf target */
64 "lm %%r6,%%r13,0(%1)\n\t"
66 LIBC_PROBE_ASM (longjmp_target
, 4@
%1 -4@
%0 4@
%%r4
)
69 "lm %%r6,%%r15,0(%1)\n\t"
70 LIBC_PROBE_ASM (longjmp_target
, 4@
%1 -4@
%0 4@
%%r14
)
81 /* Avoid `volatile function does return' warnings. */