From: Zac Walker <[email protected]>
Date: Fri, 1 Mar 2024 09:56:59 +0100
Subject: [PATCH v2 03/13] aarch64: Mark x18 register as a fixed register for
MS ABI
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-abi-ms.h: New file. Adjust
FIXED_REGISTERS, CALL_REALLY_USED_REGISTERS and
STATIC_CHAIN_REGNUM for AArch64 MS ABI.
---
gcc/config.gcc | 1 +
gcc/config/aarch64/aarch64-abi-ms.h | 64 +++++++++++++++++++++++++++++
2 files changed, 65 insertions(+)
create mode 100644 gcc/config/aarch64/aarch64-abi-ms.h
diff --git a/gcc/config.gcc b/gcc/config.gcc
index 2756377e50b..b762393b64c 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -1265,6 +1265,7 @@ aarch64*-*-linux*)
TM_MULTILIB_CONFIG=`echo $TM_MULTILIB_CONFIG | sed 's/^,//'`
;;
aarch64-*-mingw*)
+ tm_file="${tm_file} aarch64/aarch64-abi-ms.h"
tmake_file="${tmake_file} aarch64/t-aarch64"
case ${enable_threads} in
"" | yes | win32)
diff --git a/gcc/config/aarch64/aarch64-abi-ms.h
b/gcc/config/aarch64/aarch64-abi-ms.h
new file mode 100644
index 00000000000..90b0dcc5edf
--- /dev/null
+++ b/gcc/config/aarch64/aarch64-abi-ms.h
@@ -0,0 +1,64 @@
+/* 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_REGISTERS
+#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, 1, 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. */ \
+ 0, 0, 0, 0, 0, 0, 0, 0, /* V16 - V23. */ \
+ 0, 0, 0, 0, 0, 0, 0, 0, /* V24 - V31. */ \
+ 1, 1, 1, 1, /* SFP, AP, CC, VG. */ \
+ 0, 0, 0, 0, 0, 0, 0, 0, /* P0 - P7. */ \
+ 0, 0, 0, 0, 0, 0, 0, 0, /* P8 - P15. */ \
+ 1, 1, /* FFR and FFRT. */ \
+ 1, 1, 1, 1, 1, 1, 1, 1 /* Fake registers. */ \
+ }
+
+#undef CALL_REALLY_USED_REGISTERS
+#define CALL_REALLY_USED_REGISTERS \
+ { \
+ 1, 1, 1, 1, 1, 1, 1, 1, /* R0 - R7. */ \
+ 1, 1, 1, 1, 1, 1, 1, 1, /* R8 - R15. */ \
+ 1, 1, 0, 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. */ \
+ 1, 1, 1, 1, 1, 1, 1, 1, /* V16 - V23. */ \
+ 1, 1, 1, 1, 1, 1, 1, 1, /* V24 - V31. */ \
+ 1, 1, 1, 0, /* SFP, AP, CC, VG. */ \
+ 1, 1, 1, 1, 1, 1, 1, 1, /* P0 - P7. */ \
+ 1, 1, 1, 1, 1, 1, 1, 1, /* P8 - P15. */ \
+ 1, 1, /* FFR and FFRT. */ \
+ 0, 0, 0, 0, 0, 0, 0, 0 /* Fake registers. */ \
+ }
+
+#undef STATIC_CHAIN_REGNUM
+#define STATIC_CHAIN_REGNUM R17_REGNUM
+
+#endif /* GCC_AARCH64_ABI_MS_H. */
--
2.25.1
