summaryrefslogtreecommitdiffstats
path: root/arch/sh/include/asm/bug.h
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/sh/include/asm/bug.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/sh/include/asm/bug.h')
-rw-r--r--arch/sh/include/asm/bug.h121
1 files changed, 121 insertions, 0 deletions
diff --git a/arch/sh/include/asm/bug.h b/arch/sh/include/asm/bug.h
new file mode 100644
index 000000000..05a485c4f
--- /dev/null
+++ b/arch/sh/include/asm/bug.h
@@ -0,0 +1,121 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_SH_BUG_H
+#define __ASM_SH_BUG_H
+
+#include <linux/linkage.h>
+
+#define TRAPA_BUG_OPCODE 0xc33e /* trapa #0x3e */
+#define BUGFLAG_UNWINDER (1 << 1)
+
+#ifdef CONFIG_GENERIC_BUG
+#define HAVE_ARCH_BUG
+#define HAVE_ARCH_WARN_ON
+
+/**
+ * _EMIT_BUG_ENTRY
+ * %1 - __FILE__
+ * %2 - __LINE__
+ * %3 - trap type
+ * %4 - sizeof(struct bug_entry)
+ *
+ * The trapa opcode itself sits in %0.
+ * The %O notation is used to avoid # generation.
+ *
+ * The offending file and line are encoded in the __bug_table section.
+ */
+#ifdef CONFIG_DEBUG_BUGVERBOSE
+#define _EMIT_BUG_ENTRY \
+ "\t.pushsection __bug_table,\"aw\"\n" \
+ "2:\t.long 1b, %O1\n" \
+ "\t.short %O2, %O3\n" \
+ "\t.org 2b+%O4\n" \
+ "\t.popsection\n"
+#else
+#define _EMIT_BUG_ENTRY \
+ "\t.pushsection __bug_table,\"aw\"\n" \
+ "2:\t.long 1b\n" \
+ "\t.short %O3\n" \
+ "\t.org 2b+%O4\n" \
+ "\t.popsection\n"
+#endif
+
+#define BUG() \
+do { \
+ __asm__ __volatile__ ( \
+ "1:\t.short %O0\n" \
+ _EMIT_BUG_ENTRY \
+ : \
+ : "n" (TRAPA_BUG_OPCODE), \
+ "i" (__FILE__), \
+ "i" (__LINE__), "i" (0), \
+ "i" (sizeof(struct bug_entry))); \
+ unreachable(); \
+} while (0)
+
+#define __WARN_FLAGS(flags) \
+do { \
+ __asm__ __volatile__ ( \
+ "1:\t.short %O0\n" \
+ _EMIT_BUG_ENTRY \
+ : \
+ : "n" (TRAPA_BUG_OPCODE), \
+ "i" (__FILE__), \
+ "i" (__LINE__), \
+ "i" (BUGFLAG_WARNING|(flags)), \
+ "i" (sizeof(struct bug_entry))); \
+} while (0)
+
+#define WARN_ON(x) ({ \
+ int __ret_warn_on = !!(x); \
+ if (__builtin_constant_p(__ret_warn_on)) { \
+ if (__ret_warn_on) \
+ __WARN(); \
+ } else { \
+ if (unlikely(__ret_warn_on)) \
+ __WARN(); \
+ } \
+ unlikely(__ret_warn_on); \
+})
+
+#define UNWINDER_BUG() \
+do { \
+ __asm__ __volatile__ ( \
+ "1:\t.short %O0\n" \
+ _EMIT_BUG_ENTRY \
+ : \
+ : "n" (TRAPA_BUG_OPCODE), \
+ "i" (__FILE__), \
+ "i" (__LINE__), \
+ "i" (BUGFLAG_UNWINDER), \
+ "i" (sizeof(struct bug_entry))); \
+} while (0)
+
+#define UNWINDER_BUG_ON(x) ({ \
+ int __ret_unwinder_on = !!(x); \
+ if (__builtin_constant_p(__ret_unwinder_on)) { \
+ if (__ret_unwinder_on) \
+ UNWINDER_BUG(); \
+ } else { \
+ if (unlikely(__ret_unwinder_on)) \
+ UNWINDER_BUG(); \
+ } \
+ unlikely(__ret_unwinder_on); \
+})
+
+#else
+
+#define UNWINDER_BUG BUG
+#define UNWINDER_BUG_ON BUG_ON
+
+#endif /* CONFIG_GENERIC_BUG */
+
+#include <asm-generic/bug.h>
+
+struct pt_regs;
+
+/* arch/sh/kernel/traps.c */
+extern void die(const char *str, struct pt_regs *regs, long err) __attribute__ ((noreturn));
+extern void die_if_kernel(const char *str, struct pt_regs *regs, long err);
+extern void die_if_no_fixup(const char *str, struct pt_regs *regs, long err);
+
+#endif /* __ASM_SH_BUG_H */