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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/riscv/include/asm/bug.h
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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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#ifndef _ASM_RISCV_BUG_H

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#define _ASM_RISCV_BUG_H

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#include <linux/compiler.h>

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#include <linux/const.h>

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#include <linux/types.h>

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#include <asm/asm.h>

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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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#define __BUG_INSN_32	_UL(0x00100073) /* ebreak */

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#define __BUG_INSN_16	_UL(0x9002) /* c.ebreak */

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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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typedef u32 bug_insn_t;

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#ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS

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#define __BUG_ENTRY_ADDR	RISCV_INT " 1b - ."

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#define __BUG_ENTRY_FILE(file)	RISCV_INT " " file " - ."

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#else

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#define __BUG_ENTRY_ADDR	RISCV_PTR " 1b"

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#define __BUG_ENTRY_FILE(file)	RISCV_PTR " " file

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#endif

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#ifdef CONFIG_DEBUG_BUGVERBOSE

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#define __BUG_ENTRY(file, line, flags)	\

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	__BUG_ENTRY_ADDR "\n\t"		\

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	__BUG_ENTRY_FILE(file) "\n\t"	\

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	RISCV_SHORT " " line "\n\t"	\

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	RISCV_SHORT " " flags

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#else

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#define __BUG_ENTRY(file, line, flags)		\

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	__BUG_ENTRY_ADDR "\n\t"			\

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	RISCV_SHORT " " flags

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#endif

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#ifdef CONFIG_GENERIC_BUG

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#define ARCH_WARN_ASM(file, line, flags, size)			\

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		"1:\n\t"					\

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			"ebreak\n"				\

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			".pushsection __bug_table,\"aw\"\n\t"	\

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		"2:\n\t"					\

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		__BUG_ENTRY(file, line, flags) "\n\t"		\

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			".org 2b + " size "\n\t"                \

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			".popsection"				\

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#define __BUG_FLAGS(flags)					\

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do {								\

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	__asm__ __volatile__ (					\

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		ARCH_WARN_ASM("%0", "%1", "%2", "%3")		\

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		:						\

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		: "i" (__FILE__), "i" (__LINE__),		\

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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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#else /* CONFIG_GENERIC_BUG */

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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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#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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#define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLAG_WARNING|(flags))

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#define ARCH_WARN_REACHABLE

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#define HAVE_ARCH_BUG

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#include <asm-generic/bug.h>

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struct pt_regs;

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struct task_struct;

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void __show_regs(struct pt_regs *regs);

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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 */

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