1 #ifndef __ASM_SH_BUG_H 2 #define __ASM_SH_BUG_H 3 4 #define TRAPA_BUG_OPCODE 0xc33e /* trapa #0x3e */ 5 #define BUGFLAG_UNWINDER (1 << 1) 6 7 #ifdef CONFIG_GENERIC_BUG 8 #define HAVE_ARCH_BUG 9 #define HAVE_ARCH_WARN_ON 10 11 /** 12 * _EMIT_BUG_ENTRY 13 * %1 - __FILE__ 14 * %2 - __LINE__ 15 * %3 - trap type 16 * %4 - sizeof(struct bug_entry) 17 * 18 * The trapa opcode itself sits in %0. 19 * The %O notation is used to avoid # generation. 20 * 21 * The offending file and line are encoded in the __bug_table section. 22 */ 23 #ifdef CONFIG_DEBUG_BUGVERBOSE 24 #define _EMIT_BUG_ENTRY \ 25 "\t.pushsection __bug_table,\"a\"\n" \ 26 "2:\t.long 1b, %O1\n" \ 27 "\t.short %O2, %O3\n" \ 28 "\t.org 2b+%O4\n" \ 29 "\t.popsection\n" 30 #else 31 #define _EMIT_BUG_ENTRY \ 32 "\t.pushsection __bug_table,\"a\"\n" \ 33 "2:\t.long 1b\n" \ 34 "\t.short %O3\n" \ 35 "\t.org 2b+%O4\n" \ 36 "\t.popsection\n" 37 #endif 38 39 #define BUG() \ 40 do { \ 41 __asm__ __volatile__ ( \ 42 "1:\t.short %O0\n" \ 43 _EMIT_BUG_ENTRY \ 44 : \ 45 : "n" (TRAPA_BUG_OPCODE), \ 46 "i" (__FILE__), \ 47 "i" (__LINE__), "i" (0), \ 48 "i" (sizeof(struct bug_entry))); \ 49 } while (0) 50 51 #define __WARN() \ 52 do { \ 53 __asm__ __volatile__ ( \ 54 "1:\t.short %O0\n" \ 55 _EMIT_BUG_ENTRY \ 56 : \ 57 : "n" (TRAPA_BUG_OPCODE), \ 58 "i" (__FILE__), \ 59 "i" (__LINE__), \ 60 "i" (BUGFLAG_WARNING), \ 61 "i" (sizeof(struct bug_entry))); \ 62 } while (0) 63 64 #define WARN_ON(x) ({ \ 65 int __ret_warn_on = !!(x); \ 66 if (__builtin_constant_p(__ret_warn_on)) { \ 67 if (__ret_warn_on) \ 68 __WARN(); \ 69 } else { \ 70 if (unlikely(__ret_warn_on)) \ 71 __WARN(); \ 72 } \ 73 unlikely(__ret_warn_on); \ 74 }) 75 76 #define UNWINDER_BUG() \ 77 do { \ 78 __asm__ __volatile__ ( \ 79 "1:\t.short %O0\n" \ 80 _EMIT_BUG_ENTRY \ 81 : \ 82 : "n" (TRAPA_BUG_OPCODE), \ 83 "i" (__FILE__), \ 84 "i" (__LINE__), \ 85 "i" (BUGFLAG_UNWINDER), \ 86 "i" (sizeof(struct bug_entry))); \ 87 } while (0) 88 89 #define UNWINDER_BUG_ON(x) ({ \ 90 int __ret_unwinder_on = !!(x); \ 91 if (__builtin_constant_p(__ret_unwinder_on)) { \ 92 if (__ret_unwinder_on) \ 93 UNWINDER_BUG(); \ 94 } else { \ 95 if (unlikely(__ret_unwinder_on)) \ 96 UNWINDER_BUG(); \ 97 } \ 98 unlikely(__ret_unwinder_on); \ 99 }) 100 101 #endif /* CONFIG_GENERIC_BUG */ 102 103 #include <asm-generic/bug.h> 104 105 #endif /* __ASM_SH_BUG_H */ 106