mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-03 17:40:04 +00:00
![Josh Poimboeuf](/assets/img/avatar_default.png)
With CONFIG_GENERIC_BUG_RELATIVE_POINTERS, the addr/file relative pointers are calculated weirdly: based on the beginning of the bug_entry struct address, rather than their respective pointer addresses. Make the relative pointers less surprising to both humans and tools by calculating them the normal way. Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Sven Schnelle <svens@linux.ibm.com> # s390 Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Acked-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64] Link: https://lkml.kernel.org/r/f0e05be797a16f4fc2401eeb88c8450dcbe61df6.1652362951.git.jpoimboe@kernel.org
175 lines
4.2 KiB
C
175 lines
4.2 KiB
C
/* 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 - .
|
|
.4byte 5002f - .
|
|
.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 - .
|
|
.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
|
|
|
|
.macro EMIT_BUG_ENTRY addr,file,line,flags
|
|
.if \flags & 1 /* BUGFLAG_WARNING */
|
|
.err /* Use EMIT_WARN_ENTRY for warnings */
|
|
.endif
|
|
__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: .4byte 1b - .\n" \
|
|
" .4byte %0 - .\n" \
|
|
" .short %1, %2\n" \
|
|
".org 2b+%3\n" \
|
|
".previous\n"
|
|
#else
|
|
#define _EMIT_BUG_ENTRY \
|
|
".section __bug_table,\"aw\"\n" \
|
|
"2: .4byte 1b - .\n" \
|
|
" .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" ((__force long)(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 */
|