#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__ #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))); \ for(;;) ; \ } 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" ((long)(x))); \ } \ } while (0) #define __WARN() do { \ __asm__ __volatile__( \ "1: twi 31,0,0\n" \ _EMIT_BUG_ENTRY \ : : "i" (__FILE__), "i" (__LINE__), \ "i" (BUGFLAG_WARNING), \ "i" (sizeof(struct bug_entry))); \ } while (0) #define WARN_ON(x) ({ \ typeof(x) __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_WARNING), \ "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 __ */ #endif /* CONFIG_BUG */ #include <asm-generic/bug.h> #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_BUG_H */