include/asm-x86/kgdb.h

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