#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 */ #ifndef __ASSEMBLY__ struct bug_entry { unsigned long bug_addr; long line; const char *file; const char *function; }; struct bug_entry *find_bug(unsigned long bugaddr); /* * If this bit is set in the line number it means that the trap * is for WARN_ON rather than BUG or BUG_ON. */ #define BUG_WARNING_TRAP 0x1000000 #ifdef CONFIG_BUG /* * 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" \ ".section __bug_table,\"a\"\n" \ "\t"PPC_LONG" 1b,%0,%1,%2\n" \ ".previous" \ : : "i" (__LINE__), "i" (__FILE__), "i" (__FUNCTION__)); \ } while (0) #define BUG_ON(x) do { \ if (__builtin_constant_p(x)) { \ if (x) \ BUG(); \ } else { \ __asm__ __volatile__( \ "1: "PPC_TLNEI" %0,0\n" \ ".section __bug_table,\"a\"\n" \ "\t"PPC_LONG" 1b,%1,%2,%3\n" \ ".previous" \ : : "r" ((long)(x)), "i" (__LINE__), \ "i" (__FILE__), "i" (__FUNCTION__)); \ } \ } while (0) #define __WARN() do { \ __asm__ __volatile__( \ "1: twi 31,0,0\n" \ ".section __bug_table,\"a\"\n" \ "\t"PPC_LONG" 1b,%0,%1,%2\n" \ ".previous" \ : : "i" (__LINE__ + BUG_WARNING_TRAP), \ "i" (__FILE__), "i" (__FUNCTION__)); \ } 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" %0,0\n" \ ".section __bug_table,\"a\"\n" \ "\t"PPC_LONG" 1b,%1,%2,%3\n" \ ".previous" \ : : "r" (__ret_warn_on), \ "i" (__LINE__ + BUG_WARNING_TRAP), \ "i" (__FILE__), "i" (__FUNCTION__)); \ } \ unlikely(__ret_warn_on); \ }) #define HAVE_ARCH_BUG #define HAVE_ARCH_BUG_ON #define HAVE_ARCH_WARN_ON #endif /* CONFIG_BUG */ #endif /* __ASSEMBLY __ */ #include <asm-generic/bug.h> #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_BUG_H */