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