1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _PARISC_BUG_H 3 #define _PARISC_BUG_H 4 5 #include <linux/kernel.h> /* for BUGFLAG_TAINT */ 6 7 /* 8 * Tell the user there is some problem. 9 * The offending file and line are encoded in the __bug_table section. 10 */ 11 12 #ifdef CONFIG_BUG 13 #define HAVE_ARCH_BUG 14 #define HAVE_ARCH_WARN_ON 15 16 /* the break instruction is used as BUG() marker. */ 17 #define PARISC_BUG_BREAK_ASM "break 0x1f, 0x1fff" 18 #define PARISC_BUG_BREAK_INSN 0x03ffe01f /* PARISC_BUG_BREAK_ASM */ 19 20 #ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS 21 # define __BUG_REL(val) ".word " __stringify(val) " - ." 22 #else 23 # define __BUG_REL(val) ".word " __stringify(val) 24 #endif 25 26 27 #ifdef CONFIG_DEBUG_BUGVERBOSE 28 #define BUG() \ 29 do { \ 30 asm volatile("\n" \ 31 "1:\t" PARISC_BUG_BREAK_ASM "\n" \ 32 "\t.pushsection __bug_table,\"a\"\n" \ 33 "\t.align 4\n" \ 34 "2:\t" __BUG_REL(1b) "\n" \ 35 "\t" __BUG_REL(%c0) "\n" \ 36 "\t.short %1, %2\n" \ 37 "\t.blockz %3-2*4-2*2\n" \ 38 "\t.popsection" \ 39 : : "i" (__FILE__), "i" (__LINE__), \ 40 "i" (0), "i" (sizeof(struct bug_entry)) ); \ 41 unreachable(); \ 42 } while(0) 43 44 #else 45 #define BUG() \ 46 do { \ 47 asm volatile(PARISC_BUG_BREAK_ASM : : ); \ 48 unreachable(); \ 49 } while(0) 50 #endif 51 52 #ifdef CONFIG_DEBUG_BUGVERBOSE 53 #define __WARN_FLAGS(flags) \ 54 do { \ 55 asm volatile("\n" \ 56 "1:\t" PARISC_BUG_BREAK_ASM "\n" \ 57 "\t.pushsection __bug_table,\"a\"\n" \ 58 "\t.align 4\n" \ 59 "2:\t" __BUG_REL(1b) "\n" \ 60 "\t" __BUG_REL(%c0) "\n" \ 61 "\t.short %1, %2\n" \ 62 "\t.blockz %3-2*4-2*2\n" \ 63 "\t.popsection" \ 64 : : "i" (__FILE__), "i" (__LINE__), \ 65 "i" (BUGFLAG_WARNING|(flags)), \ 66 "i" (sizeof(struct bug_entry)) ); \ 67 } while(0) 68 #else 69 #define __WARN_FLAGS(flags) \ 70 do { \ 71 asm volatile("\n" \ 72 "1:\t" PARISC_BUG_BREAK_ASM "\n" \ 73 "\t.pushsection __bug_table,\"a\"\n" \ 74 "\t.align 4\n" \ 75 "2:\t" __BUG_REL(1b) "\n" \ 76 "\t.short %0\n" \ 77 "\t.blockz %1-4-2\n" \ 78 "\t.popsection" \ 79 : : "i" (BUGFLAG_WARNING|(flags)), \ 80 "i" (sizeof(struct bug_entry)) ); \ 81 } while(0) 82 #endif 83 84 85 #define WARN_ON(x) ({ \ 86 int __ret_warn_on = !!(x); \ 87 if (__builtin_constant_p(__ret_warn_on)) { \ 88 if (__ret_warn_on) \ 89 __WARN(); \ 90 } else { \ 91 if (unlikely(__ret_warn_on)) \ 92 __WARN(); \ 93 } \ 94 unlikely(__ret_warn_on); \ 95 }) 96 97 #endif 98 99 #include <asm-generic/bug.h> 100 #endif 101 102