diff options
| author | Vincent Chen <vincentc@andestech.com> | 2019-03-05 06:23:33 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@sifive.com> | 2019-05-17 06:42:12 +0300 |
| commit | d18ebc274ca78f61094fba39ec9f206d46be5a85 (patch) | |
| tree | e965c8d0b50b578f972528461223eec442e7f299 /arch | |
| parent | a21344dfc6adb78c291a48906478e76e1de08f6d (diff) | |
| download | linux-d18ebc274ca78f61094fba39ec9f206d46be5a85.tar.xz | |
riscv: support trap-based WARN()
The WARN() related function will trigger a debug exception. This can help
developers to analyze the cause of WARN() because if the debugger is
connected, the control flow will be transferred to debugging
environment.
Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/riscv/include/asm/bug.h | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/arch/riscv/include/asm/bug.h b/arch/riscv/include/asm/bug.h index bfc7f099ab1f..4d906d82277b 100644 --- a/arch/riscv/include/asm/bug.h +++ b/arch/riscv/include/asm/bug.h @@ -38,38 +38,46 @@ typedef u32 bug_insn_t; #define __BUG_ENTRY \ __BUG_ENTRY_ADDR "\n\t" \ __BUG_ENTRY_FILE "\n\t" \ - RISCV_SHORT " %1" + RISCV_SHORT " %1\n\t" \ + RISCV_SHORT " %2" #else #define __BUG_ENTRY \ - __BUG_ENTRY_ADDR + __BUG_ENTRY_ADDR "\n\t" \ + RISCV_SHORT " %2" #endif -#define BUG() \ +#define __BUG_FLAGS(flags) \ do { \ __asm__ __volatile__ ( \ "1:\n\t" \ "ebreak\n" \ - ".pushsection __bug_table,\"a\"\n\t" \ + ".pushsection __bug_table,\"aw\"\n\t" \ "2:\n\t" \ __BUG_ENTRY "\n\t" \ - ".org 2b + %2\n\t" \ + ".org 2b + %3\n\t" \ ".popsection" \ : \ : "i" (__FILE__), "i" (__LINE__), \ - "i" (sizeof(struct bug_entry))); \ - unreachable(); \ + "i" (flags), \ + "i" (sizeof(struct bug_entry))); \ } while (0) + #endif /* !__ASSEMBLY__ */ #else /* CONFIG_GENERIC_BUG */ #ifndef __ASSEMBLY__ -#define BUG() \ -do { \ +#define __BUG_FLAGS(flags) do { \ __asm__ __volatile__ ("ebreak\n"); \ - unreachable(); \ } while (0) #endif /* !__ASSEMBLY__ */ #endif /* CONFIG_GENERIC_BUG */ +#define BUG() do { \ + __BUG_FLAGS(0); \ + unreachable(); \ +} while (0) + +#define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLAG_WARNING|(flags)) + #define HAVE_ARCH_BUG #include <asm-generic/bug.h> |