LXR linux/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
  27enum 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 */
  49enum 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
  81static 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
  89extern 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 */
  93