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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_BUG_H
#define _ASM_POWERPC_BUG_H
#ifdef __KERNEL__
#include <asm/asm-compat.h>
#include <asm/extable.h>
#ifdef CONFIG_BUG
#ifdef __ASSEMBLY__
#include <asm/asm-offsets.h>
#ifdef CONFIG_DEBUG_BUGVERBOSE
.macro EMIT_BUG_ENTRY addr,file,line,flags
.section __bug_table,"aw"
5001: .4byte \addr - 5001b, 5002f - 5001b
.short \line, \flags
.org 5001b+BUG_ENTRY_SIZE
.previous
.section .rodata,"a"
5002: .asciz "\file"
.previous
.endm
#else
.macro EMIT_BUG_ENTRY addr,file,line,flags
.section __bug_table,"aw"
5001: .4byte \addr - 5001b
.short \flags
.org 5001b+BUG_ENTRY_SIZE
.previous
.endm
#endif /* verbose */
.macro EMIT_WARN_ENTRY addr,file,line,flags
EX_TABLE(\addr,\addr+4)
EMIT_BUG_ENTRY \addr,\file,\line,\flags
.endm
#else /* !__ASSEMBLY__ */
/* _EMIT_BUG_ENTRY expects args %0,%1,%2,%3 to be FILE, LINE, flags and
sizeof(struct bug_entry), respectively */
#ifdef CONFIG_DEBUG_BUGVERBOSE
#define _EMIT_BUG_ENTRY \
".section __bug_table,\"aw\"\n" \
"2:\t.4byte 1b - 2b, %0 - 2b\n" \
"\t.short %1, %2\n" \
".org 2b+%3\n" \
".previous\n"
#else
#define _EMIT_BUG_ENTRY \
".section __bug_table,\"aw\"\n" \
"2:\t.4byte 1b - 2b\n" \
"\t.short %2\n" \
".org 2b+%3\n" \
".previous\n"
#endif
#define BUG_ENTRY(insn, flags, ...) \
__asm__ __volatile__( \
"1: " insn "\n" \
_EMIT_BUG_ENTRY \
: : "i" (__FILE__), "i" (__LINE__), \
"i" (flags), \
"i" (sizeof(struct bug_entry)), \
##__VA_ARGS__)
#define WARN_ENTRY(insn, flags, label, ...) \
asm_volatile_goto( \
"1: " insn "\n" \
EX_TABLE(1b, %l[label]) \
_EMIT_BUG_ENTRY \
: : "i" (__FILE__), "i" (__LINE__), \
"i" (flags), \
"i" (sizeof(struct bug_entry)), \
##__VA_ARGS__ : : label)
/*
* BUG_ON() and WARN_ON() do their best to cooperate with compile-time
* optimisations. However depending on the complexity of the condition
* some compiler versions may not produce optimal results.
*/
#define BUG() do { \
BUG_ENTRY("twi 31, 0, 0", 0); \
unreachable(); \
} while (0)
#define HAVE_ARCH_BUG
#define __WARN_FLAGS(flags) do { \
__label__ __label_warn_on; \
\
WARN_ENTRY("twi 31, 0, 0", BUGFLAG_WARNING | (flags), __label_warn_on); \
unreachable(); \
\
__label_warn_on: \
break; \
} while (0)
#ifdef CONFIG_PPC64
#define BUG_ON(x) do { \
if (__builtin_constant_p(x)) { \
if (x) \
BUG(); \
} else { \
BUG_ENTRY(PPC_TLNEI " %4, 0", 0, "r" ((__force long)(x))); \
} \
} while (0)
#define WARN_ON(x) ({ \
bool __ret_warn_on = false; \
do { \
if (__builtin_constant_p((x))) { \
if (!(x)) \
break; \
__WARN(); \
__ret_warn_on = true; \
} else { \
__label__ __label_warn_on; \
\
WARN_ENTRY(PPC_TLNEI " %4, 0", \
BUGFLAG_WARNING | BUGFLAG_TAINT(TAINT_WARN), \
__label_warn_on, "r" (x)); \
break; \
__label_warn_on: \
__ret_warn_on = true; \
} \
} while (0); \
unlikely(__ret_warn_on); \
})
#define HAVE_ARCH_BUG_ON
#define HAVE_ARCH_WARN_ON
#endif
#endif /* __ASSEMBLY __ */
#else
#ifdef __ASSEMBLY__
.macro EMIT_BUG_ENTRY addr,file,line,flags
.endm
.macro EMIT_WARN_ENTRY addr,file,line,flags
.endm
#else /* !__ASSEMBLY__ */
#define _EMIT_BUG_ENTRY
#define _EMIT_WARN_ENTRY
#endif
#endif /* CONFIG_BUG */
#include <asm-generic/bug.h>
#ifndef __ASSEMBLY__
struct pt_regs;
void hash__do_page_fault(struct pt_regs *);
void bad_page_fault(struct pt_regs *, int);
extern void _exception(int, struct pt_regs *, int, unsigned long);
extern void _exception_pkey(struct pt_regs *, unsigned long, int);
extern void die(const char *, struct pt_regs *, long);
void die_mce(const char *str, struct pt_regs *regs, long err);
extern bool die_will_crash(void);
extern void panic_flush_kmsg_start(void);
extern void panic_flush_kmsg_end(void);
#endif /* !__ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_BUG_H */
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