1#ifndef _ASM_X86_KGDB_H 2#define _ASM_X86_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 24enum 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#define GDB_ORIG_AX 41 43#define DBG_MAX_REG_NUM 16 44#define NUMREGBYTES ((GDB_GS+1)*4) 45#else /* ! CONFIG_X86_32 */ 46enum regnames { 47 GDB_AX, /* 0 */ 48 GDB_BX, /* 1 */ 49 GDB_CX, /* 2 */ 50 GDB_DX, /* 3 */ 51 GDB_SI, /* 4 */ 52 GDB_DI, /* 5 */ 53 GDB_BP, /* 6 */ 54 GDB_SP, /* 7 */ 55 GDB_R8, /* 8 */ 56 GDB_R9, /* 9 */ 57 GDB_R10, /* 10 */ 58 GDB_R11, /* 11 */ 59 GDB_R12, /* 12 */ 60 GDB_R13, /* 13 */ 61 GDB_R14, /* 14 */ 62 GDB_R15, /* 15 */ 63 GDB_PC, /* 16 */ 64 GDB_PS, /* 17 */ 65 GDB_CS, /* 18 */ 66 GDB_SS, /* 19 */ 67}; 68#define GDB_ORIG_AX 57 69#define DBG_MAX_REG_NUM 20 70/* 17 64 bit regs and 3 32 bit regs */ 71#define NUMREGBYTES ((17 * 8) + (3 * 4)) 72#endif /* ! CONFIG_X86_32 */ 73 74static 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 81extern int kgdb_ll_trap(int cmd, const char *str, 82 struct pt_regs *regs, long err, int trap, int sig); 83 84#endif /* _ASM_X86_KGDB_H */ 85