1/* Copyright (C) 2012-2019 Free Software Foundation, Inc.
2
3   This file is part of the GNU Transactional Memory Library (libitm).
4
5   Libitm is free software; you can redistribute it and/or modify it
6   under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   Libitm is distributed in the hope that it will be useful, but WITHOUT ANY
11   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
12   FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
13   more details.
14
15   Under Section 7 of GPL version 3, you are granted additional
16   permissions described in the GCC Runtime Library Exception, version
17   3.1, as published by the Free Software Foundation.
18
19   You should have received a copy of the GNU General Public License and
20   a copy of the GCC Runtime Library Exception along with this program;
21   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
22   <http://www.gnu.org/licenses/>.  */
23
24#include "asmcfi.h"
25
26#ifdef __arch64__
27# define WORD_SIZE 8
28# define MIN_FRAME_SIZE 176
29# define STACK_BIAS 2047
30# define load  ldx
31# define store stx
32#else
33# define WORD_SIZE 4
34# define MIN_FRAME_SIZE 96
35# define STACK_BIAS 0
36# define load  ld
37# define store st
38#endif
39
40/* Fields of the JmpBuf structure.  */
41#define JB_CFA 0
42#define JB_PC  1
43#define OFFSET(FIELD) ((FIELD) * WORD_SIZE)
44
45/* The frame size must be a multiple of the double-word size.  */
46#define FRAME_SIZE (MIN_FRAME_SIZE + 2 * WORD_SIZE)
47#define JB_OFFSET  (STACK_BIAS + MIN_FRAME_SIZE)
48
49	.text
50	.align 4
51	.globl	_ITM_beginTransaction
52	.type	_ITM_beginTransaction, #function
53	.proc	016
54_ITM_beginTransaction:
55	cfi_startproc
56	add	%sp, STACK_BIAS, %g1
57	sub	%sp, FRAME_SIZE, %sp
58	cfi_def_cfa_offset(STACK_BIAS + FRAME_SIZE)
59	store	%g1, [%sp + JB_OFFSET + OFFSET (JB_CFA)]
60	store	%o7, [%sp + JB_OFFSET + OFFSET (JB_PC)]
61	/* ??? This triggers an internal error in GDB.  */
62	cfi_offset(%o7, -WORD_SIZE)
63	call	GTM_begin_transaction
64	 add	%sp, JB_OFFSET, %o1
65	load	[%sp + JB_OFFSET + OFFSET (JB_PC)], %o7
66	jmp	%o7+8
67	 add	%sp, FRAME_SIZE, %sp
68	cfi_def_cfa_offset(STACK_BIAS)
69	cfi_endproc
70	.size _ITM_beginTransaction, . - _ITM_beginTransaction
71
72	.align 4
73	.globl	GTM_longjmp
74#ifdef HAVE_ATTRIBUTE_VISIBILITY
75	.hidden	GTM_longjmp
76#endif
77	.type	GTM_longjmp, #function
78	.proc	016
79GTM_longjmp:
80	cfi_startproc
81	flushw
82#if STACK_BIAS
83	load	[%o1 + OFFSET (JB_CFA)], %g1
84	sub	%g1, STACK_BIAS, %fp
85#else
86	load	[%o1 + OFFSET (JB_CFA)], %fp
87#endif
88	cfi_def_cfa(%fp, STACK_BIAS)
89	load	[%o1 + OFFSET (JB_PC)], %o7
90	jmp	%o7+8
91	 restore %g0, %o0, %o0
92	cfi_endproc
93	.size GTM_longjmp, . - GTM_longjmp
94
95#ifdef __linux__
96	.section .note.GNU-stack, "", @progbits
97#endif
98