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/* Copyright 2008-2020 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <stdio.h>
/* Start a transaction. To avoid the need for FPR save/restore, assume
that no FP- or vector registers are modified within the transaction.
Thus invoke TBEGIN with the "allow floating-point operation" flag set
to zero, which forces a transaction abort when hitting an FP- or vector
instruction. Also assume that TBEGIN will eventually succeed, so just
retry indefinitely. */
static void
my_tbegin ()
{
__asm__ volatile
( "1: .byte 0xe5,0x60,0x00,0x00,0xff,0x00\n"
" jnz 1b"
: /* no return value */
: /* no inputs */
: "cc", "memory" );
}
/* End a transaction. */
static void
my_tend ()
{
__asm__ volatile
( " .byte 0xb2,0xf8,0x00,0x00"
: /* no return value */
: /* no inputs */
: "cc", "memory" );
}
void
try_transaction (void)
{
my_tbegin ();
my_tend ();
}
void
crash_in_transaction (void)
{
volatile char *p = 0;
my_tbegin ();
*p = 5; /* FAULT */
my_tend ();
}
int
main (int argc, char *argv[])
{
try_transaction ();
crash_in_transaction ();
return 0;
}
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