arch/x86/include/asm/kgdb.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_X86_KGDB_H
   3 #define _ASM_X86_KGDB_H
   4
   5 /*
   6  * Copyright (C) 2001-2004 Amit S. Kale
   7  * Copyright (C) 2008 Wind River Systems, Inc.
   8  */
   9
  10 #include <asm/ptrace.h>
  11
  12 /*
  13  * BUFMAX defines the maximum number of characters in inbound/outbound
  14  * buffers at least NUMREGBYTES*2 are needed for register packets
  15  * Longer buffer is needed to list all threads
  16  */
  17 #define BUFMAX                  1024
  18
  19 /*
  20  *  Note that this register image is in a different order than
  21  *  the register image that Linux produces at interrupt time.
  22  *
  23  *  Linux's register image is defined by struct pt_regs in ptrace.h.
  24  *  Just why GDB uses a different order is a historical mystery.
  25  */
  26 #ifdef CONFIG_X86_32
  27 enum regnames {
  28         GDB_AX,                 /* 0 */
  29         GDB_CX,                 /* 1 */
  30         GDB_DX,                 /* 2 */
  31         GDB_BX,                 /* 3 */
  32         GDB_SP,                 /* 4 */
  33         GDB_BP,                 /* 5 */
  34         GDB_SI,                 /* 6 */
  35         GDB_DI,                 /* 7 */
  36         GDB_PC,                 /* 8 also known as eip */
  37         GDB_PS,                 /* 9 also known as eflags */
  38         GDB_CS,                 /* 10 */
  39         GDB_SS,                 /* 11 */
  40         GDB_DS,                 /* 12 */
  41         GDB_ES,                 /* 13 */
  42         GDB_FS,                 /* 14 */
  43         GDB_GS,                 /* 15 */
  44 };
  45 #define GDB_ORIG_AX             41
  46 #define DBG_MAX_REG_NUM         16
  47 #define NUMREGBYTES             ((GDB_GS+1)*4)
  48 #else /* ! CONFIG_X86_32 */
  49 enum regnames {
  50         GDB_AX,                 /* 0 */
  51         GDB_BX,                 /* 1 */
  52         GDB_CX,                 /* 2 */
  53         GDB_DX,                 /* 3 */
  54         GDB_SI,                 /* 4 */
  55         GDB_DI,                 /* 5 */
  56         GDB_BP,                 /* 6 */
  57         GDB_SP,                 /* 7 */
  58         GDB_R8,                 /* 8 */
  59         GDB_R9,                 /* 9 */
  60         GDB_R10,                /* 10 */
  61         GDB_R11,                /* 11 */
  62         GDB_R12,                /* 12 */
  63         GDB_R13,                /* 13 */
  64         GDB_R14,                /* 14 */
  65         GDB_R15,                /* 15 */
  66         GDB_PC,                 /* 16 */
  67         GDB_PS,                 /* 17 */
  68         GDB_CS,                 /* 18 */
  69         GDB_SS,                 /* 19 */
  70         GDB_DS,                 /* 20 */
  71         GDB_ES,                 /* 21 */
  72         GDB_FS,                 /* 22 */
  73         GDB_GS,                 /* 23 */
  74 };
  75 #define GDB_ORIG_AX             57
  76 #define DBG_MAX_REG_NUM         24
  77 /* 17 64 bit regs and 5 32 bit regs */
  78 #define NUMREGBYTES             ((17 * 8) + (5 * 4))
  79 #endif /* ! CONFIG_X86_32 */
  80
  81 static inline void arch_kgdb_breakpoint(void)
  82 {
  83         asm("   int $3");
  84 }
  85 #define BREAK_INSTR_SIZE        1
  86 #define CACHE_FLUSH_IS_SAFE     1
  87 #define GDB_ADJUSTS_BREAK_OFFSET
  88
  89 extern int kgdb_ll_trap(int cmd, const char *str,
  90                         struct pt_regs *regs, long err, int trap, int sig);
  91
  92 #endif /* _ASM_X86_KGDB_H */