Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2012 Regents of the University of California
4 */
5
6#ifndef _ASM_RISCV_BUG_H
7#define _ASM_RISCV_BUG_H
8
9#include <linux/compiler.h>
10#include <linux/const.h>
11#include <linux/types.h>
12
13#include <asm/asm.h>
14
15#define __INSN_LENGTH_MASK _UL(0x3)
16#define __INSN_LENGTH_32 _UL(0x3)
17#define __COMPRESSED_INSN_MASK _UL(0xffff)
18
19#define __BUG_INSN_32 _UL(0x00100073) /* ebreak */
20#define __BUG_INSN_16 _UL(0x9002) /* c.ebreak */
21
22#define GET_INSN_LENGTH(insn) \
23({ \
24 unsigned long __len; \
25 __len = ((insn & __INSN_LENGTH_MASK) == __INSN_LENGTH_32) ? \
26 4UL : 2UL; \
27 __len; \
28})
29
30typedef u32 bug_insn_t;
31
32#ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
33#define __BUG_ENTRY_ADDR RISCV_INT " 1b - ."
34#define __BUG_ENTRY_FILE(file) RISCV_INT " " file " - ."
35#else
36#define __BUG_ENTRY_ADDR RISCV_PTR " 1b"
37#define __BUG_ENTRY_FILE(file) RISCV_PTR " " file
38#endif
39
40#ifdef CONFIG_DEBUG_BUGVERBOSE
41#define __BUG_ENTRY(file, line, flags) \
42 __BUG_ENTRY_ADDR "\n\t" \
43 __BUG_ENTRY_FILE(file) "\n\t" \
44 RISCV_SHORT " " line "\n\t" \
45 RISCV_SHORT " " flags
46#else
47#define __BUG_ENTRY(file, line, flags) \
48 __BUG_ENTRY_ADDR "\n\t" \
49 RISCV_SHORT " " flags
50#endif
51
52#ifdef CONFIG_GENERIC_BUG
53
54#define ARCH_WARN_ASM(file, line, flags, size) \
55 "1:\n\t" \
56 "ebreak\n" \
57 ".pushsection __bug_table,\"aw\"\n\t" \
58 "2:\n\t" \
59 __BUG_ENTRY(file, line, flags) "\n\t" \
60 ".org 2b + " size "\n\t" \
61 ".popsection" \
62
63#define __BUG_FLAGS(cond_str, flags) \
64do { \
65 __asm__ __volatile__ ( \
66 ARCH_WARN_ASM("%0", "%1", "%2", "%3") \
67 : \
68 : "i" (WARN_CONDITION_STR(cond_str) __FILE__), "i" (__LINE__), \
69 "i" (flags), \
70 "i" (sizeof(struct bug_entry))); \
71} while (0)
72
73#else /* CONFIG_GENERIC_BUG */
74#define __BUG_FLAGS(cond_str, flags) do { \
75 __asm__ __volatile__ ("ebreak\n"); \
76} while (0)
77#endif /* CONFIG_GENERIC_BUG */
78
79#define BUG() do { \
80 __BUG_FLAGS("", 0); \
81 unreachable(); \
82} while (0)
83
84#define __WARN_FLAGS(cond_str, flags) __BUG_FLAGS(cond_str, BUGFLAG_WARNING|(flags))
85
86#define ARCH_WARN_REACHABLE
87
88#define HAVE_ARCH_BUG
89
90#include <asm-generic/bug.h>
91
92struct pt_regs;
93struct task_struct;
94
95void __show_regs(struct pt_regs *regs);
96void die(struct pt_regs *regs, const char *str);
97void do_trap(struct pt_regs *regs, int signo, int code, unsigned long addr);
98
99#endif /* _ASM_RISCV_BUG_H */