Release 4.11 arch/powerpc/include/asm/bug.h

#ifndef _ASM_POWERPC_BUG_H

#define _ASM_POWERPC_BUG_H
#ifdef __KERNEL__

#include <asm/asm-compat.h>

/*
 * Define an illegal instr to trap on the bug.
 * We don't use 0 because that marks the end of a function
 * in the ELF ABI.  That's "Boo Boo" in case you wonder...
 */

#define BUG_OPCODE .long 0x00b00b00  
/* For asm */

#define BUG_ILLEGAL_INSTR "0x00b00b00" 
/* For BUG macro */

#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,"a"

5001:	 PPC_LONG \addr, 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,"a"
5001:	 PPC_LONG \addr
	 .short \flags
	 .org 5001b+BUG_ENTRY_SIZE
	 .previous
.endm
#endif /* verbose */

#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,\"a\"\n"          \
        "2:\t" PPC_LONG "1b, %0\n"              \
        "\t.short %1, %2\n"                     \
        ".org 2b+%3\n"                          \
        ".previous\n"
#else
#define _EMIT_BUG_ENTRY				\
	".section __bug_table,\"a\"\n"          \
        "2:\t" PPC_LONG "1b\n"                  \
        "\t.short %2\n"                         \
        ".org 2b+%3\n"                          \
        ".previous\n"
#endif

/*
 * 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 {                                            \
        __asm__ __volatile__(                                   \
                "1:     twi 31,0,0\n"                           \
                _EMIT_BUG_ENTRY                                 \
                : : "i" (__FILE__), "i" (__LINE__),             \
                    "i" (0), "i"  (sizeof(struct bug_entry)));  \
        unreachable();                                          \
} while (0)

#define BUG_ON(x) do {                                            \
        if (__builtin_constant_p(x)) {                          \
                if (x)                                          \
                        BUG();                                  \
        } else {                                                \
                __asm__ __volatile__(                           \
                "1:     "PPC_TLNEI"     %4,0\n"                 \
                _EMIT_BUG_ENTRY                                 \
                : : "i" (__FILE__), "i" (__LINE__), "i" (0),    \
                  "i" (sizeof(struct bug_entry)),               \
                  "r" ((__force long)(x)));                     \
        }                                                       \
} while (0)

#define __WARN_TAINT(taint) do {                            \
        __asm__ __volatile__(                                   \
                "1:     twi 31,0,0\n"                           \
                _EMIT_BUG_ENTRY                                 \
                : : "i" (__FILE__), "i" (__LINE__),             \
                  "i" (BUGFLAG_TAINT(taint)),                   \
                  "i" (sizeof(struct bug_entry)));              \
} while (0)

#define WARN_ON(x) ({                                              \
        int __ret_warn_on = !!(x);                              \
        if (__builtin_constant_p(__ret_warn_on)) {              \
                if (__ret_warn_on)                              \
                        __WARN();                               \
        } else {                                                \
                __asm__ __volatile__(                           \
                "1:     "PPC_TLNEI"     %4,0\n"                 \
                _EMIT_BUG_ENTRY                                 \
                : : "i" (__FILE__), "i" (__LINE__),             \
                  "i" (BUGFLAG_TAINT(TAINT_WARN)),              \
                  "i" (sizeof(struct bug_entry)),               \
                  "r" (__ret_warn_on));                         \
        }                                                       \
        unlikely(__ret_warn_on);                                \
})

#define HAVE_ARCH_BUG
#define HAVE_ARCH_BUG_ON
#define HAVE_ARCH_WARN_ON
#endif /* __ASSEMBLY __ */
#else
#ifdef __ASSEMBLY__
.macro EMIT_BUG_ENTRY addr,file,line,flags
.endm
#else /* !__ASSEMBLY__ */
#define _EMIT_BUG_ENTRY
#endif
#endif /* CONFIG_BUG */

#include <asm-generic/bug.h>

#ifndef __ASSEMBLY__

struct pt_regs;
extern int do_page_fault(struct pt_regs *, unsigned long, unsigned long);
extern void bad_page_fault(struct pt_regs *, unsigned long, int);
extern void _exception(int, struct pt_regs *, int, unsigned long);
extern void die(const char *, struct pt_regs *, long);

#endif /* !__ASSEMBLY__ */

#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_BUG_H */
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Directory: arch/powerpc/include/asm

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