[PATCH v3 2/5] riscv/bug: Add ARCH_WARN_ASM macro for BUG/WARN asm code sharing with Rust
Alexandre Ghiti
alex at ghiti.fr
Fri Feb 28 02:13:32 PST 2025
Hi FUJITA,
On 13/02/2025 14:57, FUJITA Tomonori wrote:
> Add new ARCH_WARN_ASM macro for BUG/WARN assembly code sharing with
> Rust to avoid the duplication.
>
> No functional changes.
>
> Signed-off-by: FUJITA Tomonori <fujita.tomonori at gmail.com>
> ---
> arch/riscv/include/asm/bug.h | 37 +++++++++++++++++++++---------------
> 1 file changed, 22 insertions(+), 15 deletions(-)
>
> diff --git a/arch/riscv/include/asm/bug.h b/arch/riscv/include/asm/bug.h
> index 1aaea81fb141..6ab13b56feb0 100644
> --- a/arch/riscv/include/asm/bug.h
> +++ b/arch/riscv/include/asm/bug.h
> @@ -31,40 +31,45 @@ typedef u32 bug_insn_t;
>
> #ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
> #define __BUG_ENTRY_ADDR RISCV_INT " 1b - ."
> -#define __BUG_ENTRY_FILE RISCV_INT " %0 - ."
> +#define __BUG_ENTRY_FILE(file) RISCV_INT " " file " - ."
> #else
> #define __BUG_ENTRY_ADDR RISCV_PTR " 1b"
> -#define __BUG_ENTRY_FILE RISCV_PTR " %0"
> +#define __BUG_ENTRY_FILE(file) RISCV_PTR " " file
> #endif
>
> #ifdef CONFIG_DEBUG_BUGVERBOSE
> -#define __BUG_ENTRY \
> +#define __BUG_ENTRY(file, line, flags) \
> __BUG_ENTRY_ADDR "\n\t" \
> - __BUG_ENTRY_FILE "\n\t" \
> - RISCV_SHORT " %1\n\t" \
> - RISCV_SHORT " %2"
> + __BUG_ENTRY_FILE(file) "\n\t" \
> + RISCV_SHORT " " line "\n\t" \
> + RISCV_SHORT " " flags
> #else
> -#define __BUG_ENTRY \
> - __BUG_ENTRY_ADDR "\n\t" \
> - RISCV_SHORT " %2"
> +#define __BUG_ENTRY(file, line, flags) \
> + __BUG_ENTRY_ADDR "\n\t" \
> + RISCV_SHORT " " flags
> #endif
>
> #ifdef CONFIG_GENERIC_BUG
> -#define __BUG_FLAGS(flags) \
> -do { \
> - __asm__ __volatile__ ( \
> +
> +#define ARCH_WARN_ASM(file, line, flags, size) \
> "1:\n\t" \
> "ebreak\n" \
> ".pushsection __bug_table,\"aw\"\n\t" \
> "2:\n\t" \
> - __BUG_ENTRY "\n\t" \
> - ".org 2b + %3\n\t" \
> - ".popsection" \
> + __BUG_ENTRY(file, line, flags) "\n\t" \
> + ".org 2b + " size "\n\t" \
> + ".popsection\n" \
> +
> +#define __BUG_FLAGS(flags) \
> +do { \
> + __asm__ __volatile__ ( \
> + ARCH_WARN_ASM("%0", "%1", "%2", "%3") \
> : \
> : "i" (__FILE__), "i" (__LINE__), \
> "i" (flags), \
> "i" (sizeof(struct bug_entry))); \
> } while (0)
> +
> #else /* CONFIG_GENERIC_BUG */
> #define __BUG_FLAGS(flags) do { \
> __asm__ __volatile__ ("ebreak\n"); \
> @@ -78,6 +83,8 @@ do { \
>
> #define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLAG_WARNING|(flags))
>
> +#define ARCH_WARN_REACHABLE
> +
> #define HAVE_ARCH_BUG
>
> #include <asm-generic/bug.h>
This looks good to me so:
Acked-by: Alexandre Ghiti <alexghiti at rivosinc.com>
Thanks,
Alex
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