mirror of https://gitee.com/openkylin/linux.git
92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
/* 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);
|
|
|
|
struct siginfo;
|
|
void arm_notify_die(const char *str, struct pt_regs *regs, struct siginfo *info,
|
|
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);
|
|
|
|
struct mm_struct;
|
|
extern void show_pte(struct mm_struct *mm, unsigned long addr);
|
|
extern void __show_regs(struct pt_regs *);
|
|
|
|
#endif
|