| /* Copyright (C) 2012-2021 Free Software Foundation, Inc. |
| |
| This file is part of the GNU Transactional Memory Library (libitm). |
| |
| Libitm 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. |
| |
| Libitm 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. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include "asmcfi.h" |
| |
| #ifdef __arch64__ |
| # define WORD_SIZE 8 |
| # define MIN_FRAME_SIZE 176 |
| # define STACK_BIAS 2047 |
| # define load ldx |
| # define store stx |
| #else |
| # define WORD_SIZE 4 |
| # define MIN_FRAME_SIZE 96 |
| # define STACK_BIAS 0 |
| # define load ld |
| # define store st |
| #endif |
| |
| /* Fields of the JmpBuf structure. */ |
| #define JB_CFA 0 |
| #define JB_PC 1 |
| #define OFFSET(FIELD) ((FIELD) * WORD_SIZE) |
| |
| /* The frame size must be a multiple of the double-word size. */ |
| #define FRAME_SIZE (MIN_FRAME_SIZE + 2 * WORD_SIZE) |
| #define JB_OFFSET (STACK_BIAS + MIN_FRAME_SIZE) |
| |
| .text |
| .align 4 |
| .globl _ITM_beginTransaction |
| .type _ITM_beginTransaction, #function |
| .proc 016 |
| _ITM_beginTransaction: |
| cfi_startproc |
| add %sp, STACK_BIAS, %g1 |
| sub %sp, FRAME_SIZE, %sp |
| cfi_def_cfa_offset(STACK_BIAS + FRAME_SIZE) |
| store %g1, [%sp + JB_OFFSET + OFFSET (JB_CFA)] |
| store %o7, [%sp + JB_OFFSET + OFFSET (JB_PC)] |
| /* ??? This triggers an internal error in GDB. */ |
| cfi_offset(%o7, -WORD_SIZE) |
| call GTM_begin_transaction |
| add %sp, JB_OFFSET, %o1 |
| load [%sp + JB_OFFSET + OFFSET (JB_PC)], %o7 |
| jmp %o7+8 |
| add %sp, FRAME_SIZE, %sp |
| cfi_def_cfa_offset(STACK_BIAS) |
| cfi_endproc |
| .size _ITM_beginTransaction, . - _ITM_beginTransaction |
| |
| .align 4 |
| .globl GTM_longjmp |
| #ifdef HAVE_ATTRIBUTE_VISIBILITY |
| .hidden GTM_longjmp |
| #endif |
| .type GTM_longjmp, #function |
| .proc 016 |
| GTM_longjmp: |
| cfi_startproc |
| flushw |
| #if STACK_BIAS |
| load [%o1 + OFFSET (JB_CFA)], %g1 |
| sub %g1, STACK_BIAS, %fp |
| #else |
| load [%o1 + OFFSET (JB_CFA)], %fp |
| #endif |
| cfi_def_cfa(%fp, STACK_BIAS) |
| load [%o1 + OFFSET (JB_PC)], %o7 |
| jmp %o7+8 |
| restore %g0, %o0, %o0 |
| cfi_endproc |
| .size GTM_longjmp, . - GTM_longjmp |
| |
| #ifdef __linux__ |
| .section .note.GNU-stack, "", @progbits |
| #endif |
