arch/riscv/include/asm/bug.h

   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 #ifdef CONFIG_GENERIC_BUG
  16 #define __INSN_LENGTH_MASK  _UL(0x3)
  17 #define __INSN_LENGTH_32    _UL(0x3)
  18 #define __COMPRESSED_INSN_MASK  _UL(0xffff)
  19
  20 #define __BUG_INSN_32   _UL(0x00100073) /* ebreak */
  21 #define __BUG_INSN_16   _UL(0x9002) /* c.ebreak */
  22
  23 #ifndef __ASSEMBLY__
  24 typedef u32 bug_insn_t;
  25
  26 #ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
  27 #define __BUG_ENTRY_ADDR        RISCV_INT " 1b - 2b"
  28 #define __BUG_ENTRY_FILE        RISCV_INT " %0 - 2b"
  29 #else
  30 #define __BUG_ENTRY_ADDR        RISCV_PTR " 1b"
  31 #define __BUG_ENTRY_FILE        RISCV_PTR " %0"
  32 #endif
  33
  34 #ifdef CONFIG_DEBUG_BUGVERBOSE
  35 #define __BUG_ENTRY                     \
  36         __BUG_ENTRY_ADDR "\n\t"         \
  37         __BUG_ENTRY_FILE "\n\t"         \
  38         RISCV_SHORT " %1\n\t"           \
  39         RISCV_SHORT " %2"
  40 #else
  41 #define __BUG_ENTRY                     \
  42         __BUG_ENTRY_ADDR "\n\t"         \
  43         RISCV_SHORT " %2"
  44 #endif
  45
  46 #define __BUG_FLAGS(flags)                                      \
  47 do {                                                            \
  48         __asm__ __volatile__ (                                  \
  49                 "1:\n\t"                                        \
  50                         "ebreak\n"                              \
  51                         ".pushsection __bug_table,\"aw\"\n\t"   \
  52                 "2:\n\t"                                        \
  53                         __BUG_ENTRY "\n\t"                      \
  54                         ".org 2b + %3\n\t"                      \
  55                         ".popsection"                           \
  56                 :                                               \
  57                 : "i" (__FILE__), "i" (__LINE__),               \
  58                   "i" (flags),                                  \
  59                   "i" (sizeof(struct bug_entry)));              \
  60 } while (0)
  61
  62 #endif /* !__ASSEMBLY__ */
  63 #else /* CONFIG_GENERIC_BUG */
  64 #ifndef __ASSEMBLY__
  65 #define __BUG_FLAGS(flags) do {                                 \
  66         __asm__ __volatile__ ("ebreak\n");                      \
  67 } while (0)
  68 #endif /* !__ASSEMBLY__ */
  69 #endif /* CONFIG_GENERIC_BUG */
  70
  71 #define BUG() do {                                              \
  72         __BUG_FLAGS(0);                                         \
  73         unreachable();                                          \
  74 } while (0)
  75
  76 #define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLAG_WARNING|(flags))
  77
  78 #define HAVE_ARCH_BUG
  79
  80 #include <asm-generic/bug.h>
  81
  82 #ifndef __ASSEMBLY__
  83
  84 struct pt_regs;
  85 struct task_struct;
  86
  87 extern void die(struct pt_regs *regs, const char *str);
  88 extern void do_trap(struct pt_regs *regs, int signo, int code,
  89         unsigned long addr, struct task_struct *tsk);
  90
  91 #endif /* !__ASSEMBLY__ */
  92
  93 #endif /* _ASM_RISCV_BUG_H */