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2024-05-10 10ebd8556b7990499c896a550e3d416b444211e6

 kernel/arch/riscv/include/asm/bug.h
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@@ -1,14 +1,6 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * Copyright (C) 2012 Regents of the University of California
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- *
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- *   This program is free software; you can redistribute it and/or
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- *   modify it under the terms of the GNU General Public License
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- *   as published by the Free Software Foundation, version 2.
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- *
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- *   This program is distributed in the hope that it will be useful,
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- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
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- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- *   GNU General Public License for more details.
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  */
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 #ifndef _ASM_RISCV_BUG_H
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@@ -20,10 +12,21 @@
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12
 
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 #include <asm/asm.h>
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14
 
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-#ifdef CONFIG_GENERIC_BUG
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-#define __BUG_INSN	_AC(0x00100073, UL) /* ebreak */
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+#define __INSN_LENGTH_MASK  _UL(0x3)
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+#define __INSN_LENGTH_32    _UL(0x3)
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+#define __COMPRESSED_INSN_MASK	_UL(0xffff)
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-#ifndef __ASSEMBLY__
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+#define __BUG_INSN_32	_UL(0x00100073) /* ebreak */
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+#define __BUG_INSN_16	_UL(0x9002) /* c.ebreak */
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+
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+#define GET_INSN_LENGTH(insn)						\
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+({									\
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+	unsigned long __len;						\
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+	__len = ((insn & __INSN_LENGTH_MASK) == __INSN_LENGTH_32) ?	\
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+		4UL : 2UL;						\
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+	__len;								\
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+})
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+
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 typedef u32 bug_insn_t;
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 #ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
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@@ -38,51 +41,51 @@
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 #define __BUG_ENTRY			\
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 	__BUG_ENTRY_ADDR "\n\t"		\
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 	__BUG_ENTRY_FILE "\n\t"		\
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-	RISCV_SHORT " %1"
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+	RISCV_SHORT " %1\n\t"		\
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+	RISCV_SHORT " %2"
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 #else
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 #define __BUG_ENTRY			\
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-	__BUG_ENTRY_ADDR
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+	__BUG_ENTRY_ADDR "\n\t"		\
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+	RISCV_SHORT " %2"
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 #endif
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-#define BUG()							\
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+#ifdef CONFIG_GENERIC_BUG
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+#define __BUG_FLAGS(flags)					\
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 do {								\
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 	__asm__ __volatile__ (					\
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 		"1:\n\t"					\
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 			"ebreak\n"				\
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-			".pushsection __bug_table,\"a\"\n\t"	\
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+			".pushsection __bug_table,\"aw\"\n\t"	\
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 		"2:\n\t"					\
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 			__BUG_ENTRY "\n\t"			\
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-			".org 2b + %2\n\t"			\
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+			".org 2b + %3\n\t"                      \
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 			".popsection"				\
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 		:						\
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 		: "i" (__FILE__), "i" (__LINE__),		\
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-		  "i" (sizeof(struct bug_entry)));		\
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-	unreachable();						\
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+		  "i" (flags),					\
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+		  "i" (sizeof(struct bug_entry)));              \
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 } while (0)
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-#endif /* !__ASSEMBLY__ */
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 #else /* CONFIG_GENERIC_BUG */
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-#ifndef __ASSEMBLY__
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-#define BUG()							\
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-do {								\
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+#define __BUG_FLAGS(flags) do {					\
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 	__asm__ __volatile__ ("ebreak\n");			\
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+} while (0)
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+#endif /* CONFIG_GENERIC_BUG */
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+
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+#define BUG() do {						\
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+	__BUG_FLAGS(0);						\
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 	unreachable();						\
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 } while (0)
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-#endif /* !__ASSEMBLY__ */
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-#endif /* CONFIG_GENERIC_BUG */
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+
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+#define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLAG_WARNING|(flags))
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 #define HAVE_ARCH_BUG
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 #include <asm-generic/bug.h>
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-#ifndef __ASSEMBLY__
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-
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 struct pt_regs;
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 struct task_struct;
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-extern void die(struct pt_regs *regs, const char *str);
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-extern void do_trap(struct pt_regs *regs, int signo, int code,
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-	unsigned long addr, struct task_struct *tsk);
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-
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-#endif /* !__ASSEMBLY__ */
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+void die(struct pt_regs *regs, const char *str);
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+void do_trap(struct pt_regs *regs, int signo, int code, unsigned long addr);
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 #endif /* _ASM_RISCV_BUG_H */