arch/riscv/include/asm/bug.h

   1 /*
   2  * Copyright (C) 2012 Regents of the University of California
   3  *
   4  *   This program is free software; you can redistribute it and/or
   5  *   modify it under the terms of the GNU General Public License
   6  *   as published by the Free Software Foundation, version 2.
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  */
  13
  14 #ifndef _ASM_RISCV_BUG_H
  15 #define _ASM_RISCV_BUG_H
  16
  17 #include <linux/compiler.h>
  18 #include <linux/const.h>
  19 #include <linux/types.h>
  20
  21 #include <asm/asm.h>
  22
  23 #ifdef CONFIG_GENERIC_BUG
  24 #define __BUG_INSN      _AC(0x00100073, UL) /* ebreak */
  25
  26 #ifndef __ASSEMBLY__
  27 typedef u32 bug_insn_t;
  28
  29 #ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
  30 #define __BUG_ENTRY_ADDR        RISCV_INT " 1b - 2b"
  31 #define __BUG_ENTRY_FILE        RISCV_INT " %0 - 2b"
  32 #else
  33 #define __BUG_ENTRY_ADDR        RISCV_PTR " 1b"
  34 #define __BUG_ENTRY_FILE        RISCV_PTR " %0"
  35 #endif
  36
  37 #ifdef CONFIG_DEBUG_BUGVERBOSE
  38 #define __BUG_ENTRY                     \
  39         __BUG_ENTRY_ADDR "\n\t"         \
  40         __BUG_ENTRY_FILE "\n\t"         \
  41         RISCV_SHORT " %1"
  42 #else
  43 #define __BUG_ENTRY                     \
  44         __BUG_ENTRY_ADDR
  45 #endif
  46
  47 #define BUG()                                                   \
  48 do {                                                            \
  49         __asm__ __volatile__ (                                  \
  50                 "1:\n\t"                                        \
  51                         "ebreak\n"                              \
  52                         ".pushsection __bug_table,\"a\"\n\t"    \
  53                 "2:\n\t"                                        \
  54                         __BUG_ENTRY "\n\t"                      \
  55                         ".org 2b + %2\n\t"                      \
  56                         ".popsection"                           \
  57                 :                                               \
  58                 : "i" (__FILE__), "i" (__LINE__),               \
  59                   "i" (sizeof(struct bug_entry)));              \
  60         unreachable();                                          \
  61 } while (0)
  62 #endif /* !__ASSEMBLY__ */
  63 #else /* CONFIG_GENERIC_BUG */
  64 #ifndef __ASSEMBLY__
  65 #define BUG()                                                   \
  66 do {                                                            \
  67         __asm__ __volatile__ ("ebreak\n");                      \
  68         unreachable();                                          \
  69 } while (0)
  70 #endif /* !__ASSEMBLY__ */
  71 #endif /* CONFIG_GENERIC_BUG */
  72
  73 #define HAVE_ARCH_BUG
  74
  75 #include <asm-generic/bug.h>
  76
  77 #ifndef __ASSEMBLY__
  78
  79 struct pt_regs;
  80 struct task_struct;
  81
  82 extern void die(struct pt_regs *regs, const char *str);
  83 extern void do_trap(struct pt_regs *regs, int signo, int code,
  84         unsigned long addr, struct task_struct *tsk);
  85
  86 #endif /* !__ASSEMBLY__ */
  87
  88 #endif /* _ASM_RISCV_BUG_H */