File riscv.patch of Package boxfort
From c91d7181734ab2fd6d1299e8aa927297f0ddb754 Mon Sep 17 00:00:00 2001
From: Sakura286 <sakura286@outlook.com>
Date: Wed, 22 Mar 2023 01:55:35 +0000
Subject: [PATCH] Add riscv64 support
---
meson.build | 2 ++
src/asm/trampoline-riscv64.S | 60 ++++++++++++++++++++++++++++++++++++
2 files changed, 62 insertions(+)
create mode 100644 src/asm/trampoline-riscv64.S
diff --git a/meson.build b/meson.build
index e52b427..3457bbd 100644
--- a/meson.build
+++ b/meson.build
@@ -86,6 +86,8 @@ elif arch == 'arm'
bitness = 32
elif arch == 'aarch64'
bitness = 64
+elif arch == 'riscv64'
+ bitness = 64
else
error('Architecture "@0@" is not supported.'.format(arch))
endif
diff --git a/src/asm/trampoline-riscv64.S b/src/asm/trampoline-riscv64.S
new file mode 100644
index 0000000..d7bda6c
--- /dev/null
+++ b/src/asm/trampoline-riscv64.S
@@ -0,0 +1,60 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright © 2018 Franklin "Snaipe" Mathieu <http://snai.pe/>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "config.h"
+#include "mangling.h"
+
+#ifdef ASSEMBLER_SUPPORTS_HIDDEN
+.hidden MANGLE(bxfi_trampoline)
+#endif
+.globl MANGLE(bxfi_trampoline)
+MANGLE(bxfi_trampoline):
+ ld a0, addr_data
+ jr a0
+
+/*
+ * On riscv64gc, these will expand into 3 instructions:
+ * auipc a0, 0x0 4 bytes
+ * ld a0, offset(a0) 4 bytes
+ * jr a0 2 bytes
+ * <addr_data>
+ * 'offset' is the length between `auipc` and `addr_data`.
+ */
+
+.align 1
+
+#ifdef ASSEMBLER_SUPPORTS_HIDDEN
+.hidden MANGLE(bxfi_trampoline_addr)
+#endif
+.globl MANGLE(bxfi_trampoline_addr)
+MANGLE(bxfi_trampoline_addr):
+addr_data:
+.fill 8, 1, 0
+
+#ifdef ASSEMBLER_SUPPORTS_HIDDEN
+.hidden MANGLE(bxfi_trampoline_end)
+#endif
+.globl MANGLE(bxfi_trampoline_end)
+MANGLE(bxfi_trampoline_end):
+
+#include "stackfix.h"
--
2.41.0
