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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 | /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_POWERPC_BUG_H #define _ASM_POWERPC_BUG_H #ifdef __KERNEL__ #include <asm/asm-compat.h> #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,"aw" 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,"aw" 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,\"aw\"\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,\"aw\"\n" \ "2:\t" PPC_LONG "1b\n" \ "\t.short %2\n" \ ".org 2b+%3\n" \ ".previous\n" #endif #define BUG_ENTRY(insn, flags, ...) \ __asm__ __volatile__( \ "1: " insn "\n" \ _EMIT_BUG_ENTRY \ : : "i" (__FILE__), "i" (__LINE__), \ "i" (flags), \ "i" (sizeof(struct bug_entry)), \ ##__VA_ARGS__) /* * 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 { \ BUG_ENTRY("twi 31, 0, 0", 0); \ unreachable(); \ } while (0) #define BUG_ON(x) do { \ if (__builtin_constant_p(x)) { \ if (x) \ BUG(); \ } else { \ BUG_ENTRY(PPC_TLNEI " %4, 0", 0, "r" ((__force long)(x))); \ } \ } while (0) #define __WARN_FLAGS(flags) BUG_ENTRY("twi 31, 0, 0", BUGFLAG_WARNING | (flags)) #define WARN_ON(x) ({ \ int __ret_warn_on = !!(x); \ if (__builtin_constant_p(__ret_warn_on)) { \ if (__ret_warn_on) \ __WARN(); \ } else { \ BUG_ENTRY(PPC_TLNEI " %4, 0", \ BUGFLAG_WARNING | BUGFLAG_TAINT(TAINT_WARN), \ "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 _exception_pkey(struct pt_regs *, unsigned long, int); extern void die(const char *, struct pt_regs *, long); extern bool die_will_crash(void); extern void panic_flush_kmsg_start(void); extern void panic_flush_kmsg_end(void); #endif /* !__ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_BUG_H */ |