89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
|
/* Copyright (C) 2001-2022 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
|
||
|
|
The GNU C Library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Lesser General Public
|
||
|
|
License as published by the Free Software Foundation; either
|
||
|
|
version 2.1 of the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
Lesser General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Lesser General Public
|
||
|
|
License along with the GNU C Library; if not, see
|
||
|
|
<https://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
#include <errno.h>
|
||
|
|
#include <sysdep.h>
|
||
|
|
#include <setjmp.h>
|
||
|
|
#include <bits/setjmp.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <stap-probe.h>
|
||
|
|
|
||
|
|
/* Jump to the position specified by ENV, causing the
|
||
|
|
setjmp call there to return VAL, or 1 if VAL is 0. */
|
||
|
|
void
|
||
|
|
__longjmp (__jmp_buf env, int val)
|
||
|
|
{
|
||
|
|
#ifdef PTR_DEMANGLE
|
||
|
|
uintptr_t guard = THREAD_GET_POINTER_GUARD ();
|
||
|
|
# ifdef CHECK_SP
|
||
|
|
CHECK_SP (env, guard);
|
||
|
|
# endif
|
||
|
|
#elif defined CHECK_SP
|
||
|
|
CHECK_SP (env, 0);
|
||
|
|
#endif
|
||
|
|
register long int r2 __asm__ ("%r2") = val == 0 ? 1 : val;
|
||
|
|
#ifdef PTR_DEMANGLE
|
||
|
|
register uintptr_t r3 __asm__ ("%r3") = guard;
|
||
|
|
register void *r1 __asm__ ("%r1") = (void *) env;
|
||
|
|
#endif
|
||
|
|
/* Restore registers and jump back. */
|
||
|
|
__asm__ __volatile__ (
|
||
|
|
/* longjmp probe expects longjmp first argument, second
|
||
|
|
argument and target address. */
|
||
|
|
#ifdef PTR_DEMANGLE
|
||
|
|
"lmg %%r4,%%r5,64(%1)\n\t"
|
||
|
|
"xgr %%r4,%2\n\t"
|
||
|
|
"xgr %%r5,%2\n\t"
|
||
|
|
LIBC_PROBE_ASM (longjmp, 8@%1 -4@%0 8@%%r4)
|
||
|
|
#else
|
||
|
|
LIBC_PROBE_ASM (longjmp, 8@%1 -4@%0 8@%%r14)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* restore fpregs */
|
||
|
|
"ld %%f8,80(%1)\n\t"
|
||
|
|
"ld %%f9,88(%1)\n\t"
|
||
|
|
"ld %%f10,96(%1)\n\t"
|
||
|
|
"ld %%f11,104(%1)\n\t"
|
||
|
|
"ld %%f12,112(%1)\n\t"
|
||
|
|
"ld %%f13,120(%1)\n\t"
|
||
|
|
"ld %%f14,128(%1)\n\t"
|
||
|
|
"ld %%f15,136(%1)\n\t"
|
||
|
|
|
||
|
|
/* restore gregs and return to jmp_buf target */
|
||
|
|
#ifdef PTR_DEMANGLE
|
||
|
|
"lmg %%r6,%%r13,0(%1)\n\t"
|
||
|
|
"lgr %%r15,%%r5\n\t"
|
||
|
|
LIBC_PROBE_ASM (longjmp_target, 8@%1 -4@%0 8@%%r4)
|
||
|
|
"br %%r4"
|
||
|
|
#else
|
||
|
|
"lmg %%r6,%%r15,0(%1)\n\t"
|
||
|
|
LIBC_PROBE_ASM (longjmp_target, 8@%1 -4@%0 8@%%r14)
|
||
|
|
"br %%r14"
|
||
|
|
#endif
|
||
|
|
: : "r" (r2),
|
||
|
|
#ifdef PTR_DEMANGLE
|
||
|
|
"r" (r1), "r" (r3)
|
||
|
|
#else
|
||
|
|
"a" (env)
|
||
|
|
#endif
|
||
|
|
);
|
||
|
|
|
||
|
|
/* Avoid `volatile function does return' warnings. */
|
||
|
|
for (;;);
|
||
|
|
}
|