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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 | /* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ASM_SH_BUG_H #define __ASM_SH_BUG_H #include <linux/linkage.h> #define TRAPA_BUG_OPCODE 0xc33e /* trapa #0x3e */ #define BUGFLAG_UNWINDER (1 << 1) #ifdef CONFIG_GENERIC_BUG #define HAVE_ARCH_BUG #define HAVE_ARCH_WARN_ON /** * _EMIT_BUG_ENTRY * %1 - __FILE__ * %2 - __LINE__ * %3 - trap type * %4 - sizeof(struct bug_entry) * * The trapa opcode itself sits in %0. * The %O notation is used to avoid # generation. * * The offending file and line are encoded in the __bug_table section. */ #ifdef CONFIG_DEBUG_BUGVERBOSE #define _EMIT_BUG_ENTRY \ "\t.pushsection __bug_table,\"aw\"\n" \ "2:\t.long 1b, %O1\n" \ "\t.short %O2, %O3\n" \ "\t.org 2b+%O4\n" \ "\t.popsection\n" #else #define _EMIT_BUG_ENTRY \ "\t.pushsection __bug_table,\"aw\"\n" \ "2:\t.long 1b\n" \ "\t.short %O3\n" \ "\t.org 2b+%O4\n" \ "\t.popsection\n" #endif #define BUG() \ do { \ __asm__ __volatile__ ( \ "1:\t.short %O0\n" \ _EMIT_BUG_ENTRY \ : \ : "n" (TRAPA_BUG_OPCODE), \ "i" (__FILE__), \ "i" (__LINE__), "i" (0), \ "i" (sizeof(struct bug_entry))); \ unreachable(); \ } while (0) #define __WARN_FLAGS(flags) \ do { \ __asm__ __volatile__ ( \ "1:\t.short %O0\n" \ _EMIT_BUG_ENTRY \ : \ : "n" (TRAPA_BUG_OPCODE), \ "i" (__FILE__), \ "i" (__LINE__), \ "i" (BUGFLAG_WARNING|(flags)), \ "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 { \ if (unlikely(__ret_warn_on)) \ __WARN(); \ } \ unlikely(__ret_warn_on); \ }) #define UNWINDER_BUG() \ do { \ __asm__ __volatile__ ( \ "1:\t.short %O0\n" \ _EMIT_BUG_ENTRY \ : \ : "n" (TRAPA_BUG_OPCODE), \ "i" (__FILE__), \ "i" (__LINE__), \ "i" (BUGFLAG_UNWINDER), \ "i" (sizeof(struct bug_entry))); \ } while (0) #define UNWINDER_BUG_ON(x) ({ \ int __ret_unwinder_on = !!(x); \ if (__builtin_constant_p(__ret_unwinder_on)) { \ if (__ret_unwinder_on) \ UNWINDER_BUG(); \ } else { \ if (unlikely(__ret_unwinder_on)) \ UNWINDER_BUG(); \ } \ unlikely(__ret_unwinder_on); \ }) #else #define UNWINDER_BUG BUG #define UNWINDER_BUG_ON BUG_ON #endif /* CONFIG_GENERIC_BUG */ #include <asm-generic/bug.h> struct pt_regs; /* arch/sh/kernel/traps.c */ extern void die(const char *str, struct pt_regs *regs, long err) __attribute__ ((noreturn)); extern void die_if_kernel(const char *str, struct pt_regs *regs, long err); extern void die_if_no_fixup(const char *str, struct pt_regs *regs, long err); #endif /* __ASM_SH_BUG_H */ |