/* SPDX-License-Identifier: GPL-2.0 */#ifndef _ASMARM_BUG_H#define _ASMARM_BUG_H #include <linux/linkage.h>#include <linux/types.h>#include <asm/opcodes.h> /* * Use a suitable undefined instruction to use for ARM/Thumb2 bug handling. * We need to be careful not to conflict with those used by other modules and * the register_undef_hook() system. */#ifdef CONFIG_THUMB2_KERNEL#define BUG_INSTR_VALUE 0xde02#define BUG_INSTR(__value) __inst_thumb16(__value)#else#define BUG_INSTR_VALUE 0xe7f001f2#define BUG_INSTR(__value) __inst_arm(__value)#endif  #define BUG() _BUG(__FILE__, __LINE__, BUG_INSTR_VALUE)#define _BUG(file, line, value) __BUG(file, line, value) #ifdef CONFIG_DEBUG_BUGVERBOSE /* * The extra indirection is to ensure that the __FILE__ string comes through * OK. Many version of gcc do not support the asm %c parameter which would be * preferable to this unpleasantness. We use mergeable string sections to * avoid multiple copies of the string appearing in the kernel image. */ #define __BUG(__file, __line, __value)				\do {								\	asm volatile("1:\t" BUG_INSTR(__value) "\n"  \		".pushsection .rodata.str, \"aMS\", %progbits, 1\n" \		"2:\t.asciz " #__file "\n" 			\		".popsection\n" 				\		".pushsection __bug_table,\"aw\"\n"		\		".align 2\n"					\		"3:\t.word 1b, 2b\n"				\		"\t.hword " #__line ", 0\n"			\		".popsection");					\	unreachable();						\} while (0) #else #define __BUG(__file, __line, __value)				\do {								\	asm volatile(BUG_INSTR(__value) "\n");			\	unreachable();						\} while (0)#endif  /* CONFIG_DEBUG_BUGVERBOSE */ #define HAVE_ARCH_BUG #include <asm-generic/bug.h> struct pt_regs;void die(const char *msg, struct pt_regs *regs, int err); void arm_notify_die(const char *str, struct pt_regs *regs,		int signo, int si_code, void __user *addr,		unsigned long err, unsigned long trap); #ifdef CONFIG_ARM_LPAE#define FAULT_CODE_ALIGNMENT	33#define FAULT_CODE_DEBUG	34#else#define FAULT_CODE_ALIGNMENT	1#define FAULT_CODE_DEBUG	2#endif void hook_fault_code(int nr, int (*fn)(unsigned long, unsigned int,				       struct pt_regs *),		     int sig, int code, const char *name); void hook_ifault_code(int nr, int (*fn)(unsigned long, unsigned int,				       struct pt_regs *),		     int sig, int code, const char *name); extern asmlinkage void c_backtrace(unsigned long fp, int pmode,				   const char *loglvl); struct mm_struct;void show_pte(const char *lvl, struct mm_struct *mm, unsigned long addr);extern void __show_regs(struct pt_regs *);extern void __show_regs_alloc_free(struct pt_regs *regs); #endif