i386.c

这个是LINUX下的GDB调度工具的源码

#include <dfs.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <time.h>
#include <conio.h>
#include <advanced.h>
#include <debugapi.h>
#include <process.h>
#include <errno.h>
#include "i386.h"

extern char *mem2hex (void *mem, char *buf, int count, int may_fault);
extern char *hex2mem (char *buf, void *mem, int count, int may_fault);
extern int computeSignal (int exceptionVector);

void
flush_i_cache (void)
{
}

/* Get the registers out of the frame information.  */

void
frame_to_registers (struct StackFrame *frame, char *regs)
{
  /* Copy EAX -> EDI */
  mem2hex (&frame->ExceptionEAX, &regs[0 * 4 * 2], 4 * 8, 0);

  /* Copy EIP & PS */
  mem2hex (&frame->ExceptionPC, &regs[8 * 4 * 2], 4 * 2, 0);

  /* Copy CS, SS, DS */
  mem2hex (&frame->ExceptionCS, &regs[10 * 4 * 2], 4 * 3, 0);

  /* Copy ES */
  mem2hex (&frame->ExceptionES, &regs[13 * 4 * 2], 4 * 1, 0);

  /* Copy FS & GS */
  mem2hex (&frame->ExceptionFS, &regs[14 * 4 * 2], 4 * 2, 0);
}

/* Put the registers back into the frame information.  */

void
registers_to_frame (char *regs, struct StackFrame *frame)
{
  /* Copy EAX -> EDI */
  hex2mem (&regs[0 * 4 * 2], &frame->ExceptionEAX, 4 * 8, 0);

  /* Copy EIP & PS */
  hex2mem (&regs[8 * 4 * 2], &frame->ExceptionPC, 4 * 2, 0);

  /* Copy CS, SS, DS */
  hex2mem (&regs[10 * 4 * 2], &frame->ExceptionCS, 4 * 3, 0);

  /* Copy ES */
  hex2mem (&regs[13 * 4 * 2], &frame->ExceptionES, 4 * 1, 0);

  /* Copy FS & GS */
  hex2mem (&regs[14 * 4 * 2], &frame->ExceptionFS, 4 * 2, 0);
}

void
set_step_traps (struct StackFrame *frame)
{
  frame->ExceptionSystemFlags |= 0x100;
}

void
clear_step_traps (struct StackFrame *frame)
{
  frame->ExceptionSystemFlags &= ~0x100;
}

void
do_status (char *ptr, struct StackFrame *frame)
{
  int sigval;

  sigval = computeSignal (frame->ExceptionNumber);

  sprintf (ptr, "T%02x", sigval);
  ptr += 3;

  sprintf (ptr, "%02x:", PC_REGNUM);
  ptr = mem2hex (&frame->ExceptionPC, ptr + 3, 4, 0);
  *ptr++ = ';';

  sprintf (ptr, "%02x:", SP_REGNUM);
  ptr = mem2hex (&frame->ExceptionESP, ptr + 3, 4, 0);
  *ptr++ = ';';

  sprintf (ptr, "%02x:", DEPRECATED_FP_REGNUM);
  ptr = mem2hex (&frame->ExceptionEBP, ptr + 3, 4, 0);
  *ptr++ = ';';

  *ptr = '\000';
}