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aarch64: Mark x18 register as a fixed register for MS ABI

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Define the MS ABI for aarch64-w64-mingw32.
Adjust FIXED_REGISTERS, CALL_REALLY_USED_REGISTERS and
STATIC_CHAIN_REGNUM for AArch64 MS ABI.
The X18 register is reserved on Windows for the TEB.

gcc/ChangeLog:

	* config.gcc: Define TARGET_AARCH64_MS_ABI when
	AArch64 MS ABI is used.
	* config/aarch64/aarch64.h (FIXED_X18): Adjust
	FIXED_REGISTERS, CALL_REALLY_USED_REGISTERS and
	STATIC_CHAIN_REGNUM for AArch64 MS ABI.
	(CALL_USED_X18): Likewise.
	(FIXED_REGISTERS): Likewise.
	* config/aarch64/aarch64-abi-ms.h: New file.
This commit is contained in:
Zac Walker 2024-04-11 13:30:27 +02:00 • committed by Christophe Lyon
parent 13bad1ac7a
commit b9415046fa
3 changed files with 40 additions and 2 deletions
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1
gcc/config.gcc
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@ -1271,6 +1271,7 @@ aarch64*-*-gnu*)
tm_defines="${tm_defines} TARGET_DEFAULT_ASYNC_UNWIND_TABLES=1"
;;
aarch64-*-mingw*)
tm_file="${tm_file} aarch64/aarch64-abi-ms.h"
tmake_file="${tmake_file} aarch64/t-aarch64"
case ${enable_threads} in
"" | yes | win32)

34
gcc/config/aarch64/aarch64-abi-ms.h Normal file
View file

@ -0,0 +1,34 @@
/* Machine description for AArch64 MS ABI.
Copyright (C) 2024 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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, or (at your option)
any later version.
GCC 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 GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_AARCH64_ABI_MS_H
#define GCC_AARCH64_ABI_MS_H
/* X18 reserved for the TEB on Windows. */
#undef FIXED_X18
#define FIXED_X18 1
#undef CALL_USED_X18
#define CALL_USED_X18 0
#undef STATIC_CHAIN_REGNUM
#define STATIC_CHAIN_REGNUM R17_REGNUM
#endif /* GCC_AARCH64_ABI_MS_H. */

7
gcc/config/aarch64/aarch64.h
View file

@ -537,11 +537,14 @@ constexpr auto AARCH64_FL_DEFAULT_ISA_MODE = AARCH64_FL_SM_OFF;
register. GCC internally uses the poly_int variable aarch64_sve_vg
instead. */
#define FIXED_X18 0
#define CALL_USED_X18 1
#define FIXED_REGISTERS \
{ \
0, 0, 0, 0, 0, 0, 0, 0, /* R0 - R7 */ \
0, 0, 0, 0, 0, 0, 0, 0, /* R8 - R15 */ \
0, 0, 0, 0, 0, 0, 0, 0, /* R16 - R23 */ \
0, 0, FIXED_X18, 0, 0, 0, 0, 0, /* R16 - R23. */ \
0, 0, 0, 0, 0, 1, 0, 1, /* R24 - R30, SP */ \
0, 0, 0, 0, 0, 0, 0, 0, /* V0 - V7 */ \
0, 0, 0, 0, 0, 0, 0, 0, /* V8 - V15 */ \
@ -565,7 +568,7 @@ constexpr auto AARCH64_FL_DEFAULT_ISA_MODE = AARCH64_FL_SM_OFF;
{ \
1, 1, 1, 1, 1, 1, 1, 1, /* R0 - R7 */ \
1, 1, 1, 1, 1, 1, 1, 1, /* R8 - R15 */ \
1, 1, 1, 0, 0, 0, 0, 0, /* R16 - R23 */ \
1, 1, CALL_USED_X18, 0, 0, 0, 0, 0, /* R16 - R23. */ \
0, 0, 0, 0, 0, 1, 1, 1, /* R24 - R30, SP */ \
1, 1, 1, 1, 1, 1, 1, 1, /* V0 - V7 */ \
0, 0, 0, 0, 0, 0, 0, 0, /* V8 - V15 */ \