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arm64/bug: Add ARCH_WARN_ASM macro for BUG/WARN asm code sharing with Rust

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Add new ARCH_WARN_ASM macro for BUG/WARN assembly code sharing with
Rust to avoid the duplication.

No functional changes.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Link: https://lore.kernel.org/r/20250502094537.231725-4-fujita.tomonori@gmail.com
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
FUJITA Tomonori
2025-05-02 18:45:35 +09:00
committed by Miguel Ojeda
parent 8ad470d4e3
commit 826230970a
1 changed files with 29 additions and 4 deletions
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33
arch/arm64/include/asm/asm-bug.h
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@@ -21,16 +21,21 @@
#endif
#ifdef CONFIG_GENERIC_BUG
#define __BUG_ENTRY(flags) \
#define __BUG_ENTRY_START \
.pushsection __bug_table,"aw"; \
.align 2; \
14470: .long 14471f - .; \
_BUGVERBOSE_LOCATION(__FILE__, __LINE__) \
.short flags; \
#define __BUG_ENTRY_END \
.align 2; \
.popsection; \
14471:
#define __BUG_ENTRY(flags) \
__BUG_ENTRY_START \
_BUGVERBOSE_LOCATION(__FILE__, __LINE__) \
.short flags; \
__BUG_ENTRY_END
#else
#define __BUG_ENTRY(flags)
#endif
@@ -41,4 +46,24 @@ _BUGVERBOSE_LOCATION(__FILE__, __LINE__) \
#define ASM_BUG() ASM_BUG_FLAGS(0)
#ifdef CONFIG_DEBUG_BUGVERBOSE
#define __BUG_LOCATION_STRING(file, line) \
".long " file "- .;" \
".short " line ";"
#else
#define __BUG_LOCATION_STRING(file, line)
#endif
#define __BUG_ENTRY_STRING(file, line, flags) \
__stringify(__BUG_ENTRY_START) \
__BUG_LOCATION_STRING(file, line) \
".short " flags ";" \
__stringify(__BUG_ENTRY_END)
#define ARCH_WARN_ASM(file, line, flags, size) \
__BUG_ENTRY_STRING(file, line, flags) \
__stringify(brk BUG_BRK_IMM)
#define ARCH_WARN_REACHABLE
#endif /* __ASM_ASM_BUG_H */