root/include/asm-x86/kgdb.h

INCLUDED FROM

DEFINITIONS

1. arch_kgdb_breakpoint

#ifndef ASM_X86__KGDB_H
#define ASM_X86__KGDB_H

/*
 * Copyright (C) 2001-2004 Amit S. Kale
 * Copyright (C) 2008 Wind River Systems, Inc.
 */

/*
 * BUFMAX defines the maximum number of characters in inbound/outbound
 * buffers at least NUMREGBYTES*2 are needed for register packets
 * Longer buffer is needed to list all threads
 */
#define BUFMAX                  1024

/*
 *  Note that this register image is in a different order than
 *  the register image that Linux produces at interrupt time.
 *
 *  Linux's register image is defined by struct pt_regs in ptrace.h.
 *  Just why GDB uses a different order is a historical mystery.
 */
#ifdef CONFIG_X86_32
enum regnames {
        GDB_AX,                 /* 0 */
        GDB_CX,                 /* 1 */
        GDB_DX,                 /* 2 */
        GDB_BX,                 /* 3 */
        GDB_SP,                 /* 4 */
        GDB_BP,                 /* 5 */
        GDB_SI,                 /* 6 */
        GDB_DI,                 /* 7 */
        GDB_PC,                 /* 8 also known as eip */
        GDB_PS,                 /* 9 also known as eflags */
        GDB_CS,                 /* 10 */
        GDB_SS,                 /* 11 */
        GDB_DS,                 /* 12 */
        GDB_ES,                 /* 13 */
        GDB_FS,                 /* 14 */
        GDB_GS,                 /* 15 */
};
#define NUMREGBYTES             ((GDB_GS+1)*4)
#else /* ! CONFIG_X86_32 */
enum regnames64 {
        GDB_AX,                 /* 0 */
        GDB_BX,                 /* 1 */
        GDB_CX,                 /* 2 */
        GDB_DX,                 /* 3 */
        GDB_SI,                 /* 4 */
        GDB_DI,                 /* 5 */
        GDB_BP,                 /* 6 */
        GDB_SP,                 /* 7 */
        GDB_R8,                 /* 8 */
        GDB_R9,                 /* 9 */
        GDB_R10,                /* 10 */
        GDB_R11,                /* 11 */
        GDB_R12,                /* 12 */
        GDB_R13,                /* 13 */
        GDB_R14,                /* 14 */
        GDB_R15,                /* 15 */
        GDB_PC,                 /* 16 */
};

enum regnames32 {
        GDB_PS = 34,
        GDB_CS,
        GDB_SS,
};
#define NUMREGBYTES             ((GDB_SS+1)*4)
#endif /* CONFIG_X86_32 */

static inline void arch_kgdb_breakpoint(void)
{
        asm("   int $3");
}
#define BREAK_INSTR_SIZE        1
#define CACHE_FLUSH_IS_SAFE     1

#endif /* ASM_X86__KGDB_H */