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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/arm64/include/asm/compiler.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm64/include/asm/compiler.h')
-rw-r--r--arch/arm64/include/asm/compiler.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/compiler.h b/arch/arm64/include/asm/compiler.h
new file mode 100644
index 0000000000..9bbd7b7097
--- /dev/null
+++ b/arch/arm64/include/asm/compiler.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_COMPILER_H
+#define __ASM_COMPILER_H
+
+#ifdef ARM64_ASM_ARCH
+#define ARM64_ASM_PREAMBLE ".arch " ARM64_ASM_ARCH "\n"
+#else
+#define ARM64_ASM_PREAMBLE
+#endif
+
+#define xpaclri(ptr) \
+({ \
+ register unsigned long __xpaclri_ptr asm("x30") = (ptr); \
+ \
+ asm( \
+ ARM64_ASM_PREAMBLE \
+ " hint #7\n" \
+ : "+r" (__xpaclri_ptr)); \
+ \
+ __xpaclri_ptr; \
+})
+
+#ifdef CONFIG_ARM64_PTR_AUTH_KERNEL
+#define ptrauth_strip_kernel_insn_pac(ptr) xpaclri(ptr)
+#else
+#define ptrauth_strip_kernel_insn_pac(ptr) (ptr)
+#endif
+
+#ifdef CONFIG_ARM64_PTR_AUTH
+#define ptrauth_strip_user_insn_pac(ptr) xpaclri(ptr)
+#else
+#define ptrauth_strip_user_insn_pac(ptr) (ptr)
+#endif
+
+#if !defined(CONFIG_BUILTIN_RETURN_ADDRESS_STRIPS_PAC)
+#define __builtin_return_address(val) \
+ (void *)(ptrauth_strip_kernel_insn_pac((unsigned long)__builtin_return_address(val)))
+#endif
+
+#endif /* __ASM_COMPILER_H */