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
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.