| /* Copyright 2008-2021 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; |
| } |