wrapper.c

这个是LINUX下的GDB调度工具的源码

    case SIM_ARM_FP5_REGNUM:
    case SIM_ARM_FP6_REGNUM:
    case SIM_ARM_FP7_REGNUM:
    case SIM_ARM_FPS_REGNUM:
      ARMul_SetReg (state, state->Mode, rn, frommem (state, memory));
      break;

    case SIM_ARM_PS_REGNUM:
      state->Cpsr = frommem (state, memory);
      ARMul_CPSRAltered (state);
      break;

    case SIM_ARM_MAVERIC_COP0R0_REGNUM:
    case SIM_ARM_MAVERIC_COP0R1_REGNUM:
    case SIM_ARM_MAVERIC_COP0R2_REGNUM:
    case SIM_ARM_MAVERIC_COP0R3_REGNUM:
    case SIM_ARM_MAVERIC_COP0R4_REGNUM:
    case SIM_ARM_MAVERIC_COP0R5_REGNUM:
    case SIM_ARM_MAVERIC_COP0R6_REGNUM:
    case SIM_ARM_MAVERIC_COP0R7_REGNUM:
    case SIM_ARM_MAVERIC_COP0R8_REGNUM:
    case SIM_ARM_MAVERIC_COP0R9_REGNUM:
    case SIM_ARM_MAVERIC_COP0R10_REGNUM:
    case SIM_ARM_MAVERIC_COP0R11_REGNUM:
    case SIM_ARM_MAVERIC_COP0R12_REGNUM:
    case SIM_ARM_MAVERIC_COP0R13_REGNUM:
    case SIM_ARM_MAVERIC_COP0R14_REGNUM:
    case SIM_ARM_MAVERIC_COP0R15_REGNUM:
      memcpy (& DSPregs [rn - SIM_ARM_MAVERIC_COP0R0_REGNUM],
	      memory, sizeof (struct maverick_regs));
      return sizeof (struct maverick_regs);

    case SIM_ARM_MAVERIC_DSPSC_REGNUM:
      memcpy (&DSPsc, memory, sizeof DSPsc);
      return sizeof DSPsc;

    case SIM_ARM_IWMMXT_COP0R0_REGNUM:
    case SIM_ARM_IWMMXT_COP0R1_REGNUM:
    case SIM_ARM_IWMMXT_COP0R2_REGNUM:
    case SIM_ARM_IWMMXT_COP0R3_REGNUM:
    case SIM_ARM_IWMMXT_COP0R4_REGNUM:
    case SIM_ARM_IWMMXT_COP0R5_REGNUM:
    case SIM_ARM_IWMMXT_COP0R6_REGNUM:
    case SIM_ARM_IWMMXT_COP0R7_REGNUM:
    case SIM_ARM_IWMMXT_COP0R8_REGNUM:
    case SIM_ARM_IWMMXT_COP0R9_REGNUM:
    case SIM_ARM_IWMMXT_COP0R10_REGNUM:
    case SIM_ARM_IWMMXT_COP0R11_REGNUM:
    case SIM_ARM_IWMMXT_COP0R12_REGNUM:
    case SIM_ARM_IWMMXT_COP0R13_REGNUM:
    case SIM_ARM_IWMMXT_COP0R14_REGNUM:
    case SIM_ARM_IWMMXT_COP0R15_REGNUM:
    case SIM_ARM_IWMMXT_COP1R0_REGNUM:
    case SIM_ARM_IWMMXT_COP1R1_REGNUM:
    case SIM_ARM_IWMMXT_COP1R2_REGNUM:
    case SIM_ARM_IWMMXT_COP1R3_REGNUM:
    case SIM_ARM_IWMMXT_COP1R4_REGNUM:
    case SIM_ARM_IWMMXT_COP1R5_REGNUM:
    case SIM_ARM_IWMMXT_COP1R6_REGNUM:
    case SIM_ARM_IWMMXT_COP1R7_REGNUM:
    case SIM_ARM_IWMMXT_COP1R8_REGNUM:
    case SIM_ARM_IWMMXT_COP1R9_REGNUM:
    case SIM_ARM_IWMMXT_COP1R10_REGNUM:
    case SIM_ARM_IWMMXT_COP1R11_REGNUM:
    case SIM_ARM_IWMMXT_COP1R12_REGNUM:
    case SIM_ARM_IWMMXT_COP1R13_REGNUM:
    case SIM_ARM_IWMMXT_COP1R14_REGNUM:
    case SIM_ARM_IWMMXT_COP1R15_REGNUM:
      return Store_Iwmmxt_Register (rn - SIM_ARM_IWMMXT_COP0R0_REGNUM, memory);

    default:
      return 0;
    }

  return -1;
}

int
sim_fetch_register (sd, rn, memory, length)
     SIM_DESC sd ATTRIBUTE_UNUSED;
     int rn;
     unsigned char *memory;
     int length ATTRIBUTE_UNUSED;
{
  ARMword regval;

  init ();

  switch ((enum sim_arm_regs) rn)
    {
    case SIM_ARM_R0_REGNUM:
    case SIM_ARM_R1_REGNUM:
    case SIM_ARM_R2_REGNUM:
    case SIM_ARM_R3_REGNUM:
    case SIM_ARM_R4_REGNUM:
    case SIM_ARM_R5_REGNUM:
    case SIM_ARM_R6_REGNUM:
    case SIM_ARM_R7_REGNUM:
    case SIM_ARM_R8_REGNUM:
    case SIM_ARM_R9_REGNUM:
    case SIM_ARM_R10_REGNUM:
    case SIM_ARM_R11_REGNUM:
    case SIM_ARM_R12_REGNUM:
    case SIM_ARM_R13_REGNUM:
    case SIM_ARM_R14_REGNUM:
    case SIM_ARM_R15_REGNUM: /* PC */
      regval = ARMul_GetReg (state, state->Mode, rn);
      break;

    case SIM_ARM_FP0_REGNUM:
    case SIM_ARM_FP1_REGNUM:
    case SIM_ARM_FP2_REGNUM:
    case SIM_ARM_FP3_REGNUM:
    case SIM_ARM_FP4_REGNUM:
    case SIM_ARM_FP5_REGNUM:
    case SIM_ARM_FP6_REGNUM:
    case SIM_ARM_FP7_REGNUM:
    case SIM_ARM_FPS_REGNUM:
      memset (memory, 0, length);
      return 0;

    case SIM_ARM_PS_REGNUM:
      regval = ARMul_GetCPSR (state);
      break;

    case SIM_ARM_MAVERIC_COP0R0_REGNUM:
    case SIM_ARM_MAVERIC_COP0R1_REGNUM:
    case SIM_ARM_MAVERIC_COP0R2_REGNUM:
    case SIM_ARM_MAVERIC_COP0R3_REGNUM:
    case SIM_ARM_MAVERIC_COP0R4_REGNUM:
    case SIM_ARM_MAVERIC_COP0R5_REGNUM:
    case SIM_ARM_MAVERIC_COP0R6_REGNUM:
    case SIM_ARM_MAVERIC_COP0R7_REGNUM:
    case SIM_ARM_MAVERIC_COP0R8_REGNUM:
    case SIM_ARM_MAVERIC_COP0R9_REGNUM:
    case SIM_ARM_MAVERIC_COP0R10_REGNUM:
    case SIM_ARM_MAVERIC_COP0R11_REGNUM:
    case SIM_ARM_MAVERIC_COP0R12_REGNUM:
    case SIM_ARM_MAVERIC_COP0R13_REGNUM:
    case SIM_ARM_MAVERIC_COP0R14_REGNUM:
    case SIM_ARM_MAVERIC_COP0R15_REGNUM:
      memcpy (memory, & DSPregs [rn - SIM_ARM_MAVERIC_COP0R0_REGNUM],
	      sizeof (struct maverick_regs));
      return sizeof (struct maverick_regs);

    case SIM_ARM_MAVERIC_DSPSC_REGNUM:
      memcpy (memory, & DSPsc, sizeof DSPsc);
      return sizeof DSPsc;

    case SIM_ARM_IWMMXT_COP0R0_REGNUM:
    case SIM_ARM_IWMMXT_COP0R1_REGNUM:
    case SIM_ARM_IWMMXT_COP0R2_REGNUM:
    case SIM_ARM_IWMMXT_COP0R3_REGNUM:
    case SIM_ARM_IWMMXT_COP0R4_REGNUM:
    case SIM_ARM_IWMMXT_COP0R5_REGNUM:
    case SIM_ARM_IWMMXT_COP0R6_REGNUM:
    case SIM_ARM_IWMMXT_COP0R7_REGNUM:
    case SIM_ARM_IWMMXT_COP0R8_REGNUM:
    case SIM_ARM_IWMMXT_COP0R9_REGNUM:
    case SIM_ARM_IWMMXT_COP0R10_REGNUM:
    case SIM_ARM_IWMMXT_COP0R11_REGNUM:
    case SIM_ARM_IWMMXT_COP0R12_REGNUM:
    case SIM_ARM_IWMMXT_COP0R13_REGNUM:
    case SIM_ARM_IWMMXT_COP0R14_REGNUM:
    case SIM_ARM_IWMMXT_COP0R15_REGNUM:
    case SIM_ARM_IWMMXT_COP1R0_REGNUM:
    case SIM_ARM_IWMMXT_COP1R1_REGNUM:
    case SIM_ARM_IWMMXT_COP1R2_REGNUM:
    case SIM_ARM_IWMMXT_COP1R3_REGNUM:
    case SIM_ARM_IWMMXT_COP1R4_REGNUM:
    case SIM_ARM_IWMMXT_COP1R5_REGNUM:
    case SIM_ARM_IWMMXT_COP1R6_REGNUM:
    case SIM_ARM_IWMMXT_COP1R7_REGNUM:
    case SIM_ARM_IWMMXT_COP1R8_REGNUM:
    case SIM_ARM_IWMMXT_COP1R9_REGNUM:
    case SIM_ARM_IWMMXT_COP1R10_REGNUM:
    case SIM_ARM_IWMMXT_COP1R11_REGNUM:
    case SIM_ARM_IWMMXT_COP1R12_REGNUM:
    case SIM_ARM_IWMMXT_COP1R13_REGNUM:
    case SIM_ARM_IWMMXT_COP1R14_REGNUM:
    case SIM_ARM_IWMMXT_COP1R15_REGNUM:
      return Fetch_Iwmmxt_Register (rn - SIM_ARM_IWMMXT_COP0R0_REGNUM, memory);

    default:
      return 0;
    }

  while (length)
    {
      tomem (state, memory, regval);

      length -= 4;
      memory += 4;
      regval = 0;
    }  

  return -1;
}

#ifdef SIM_TARGET_SWITCHES

static void sim_target_parse_arg_array PARAMS ((char **));

typedef struct
{
  char * 	swi_option;
  unsigned int	swi_mask;
} swi_options;

#define SWI_SWITCH	"--swi-support"

static swi_options options[] =
  {
    { "none",    0 },
    { "demon",   SWI_MASK_DEMON },
    { "angel",   SWI_MASK_ANGEL },
    { "redboot", SWI_MASK_REDBOOT },
    { "all",     -1 },
    { "NONE",    0 },
    { "DEMON",   SWI_MASK_DEMON },
    { "ANGEL",   SWI_MASK_ANGEL },
    { "REDBOOT", SWI_MASK_REDBOOT },
    { "ALL",     -1 }
  };


int
sim_target_parse_command_line (argc, argv)
     int argc;
     char ** argv;
{
  int i;

  for (i = 1; i < argc; i++)
    {
      char * ptr = argv[i];
      int arg;

      if ((ptr == NULL) || (* ptr != '-'))
	break;

      if (strncmp (ptr, SWI_SWITCH, sizeof SWI_SWITCH - 1) != 0)
	continue;

      if (ptr[sizeof SWI_SWITCH - 1] == 0)
	{
	  /* Remove this option from the argv array.  */
	  for (arg = i; arg < argc; arg ++)
	    argv[arg] = argv[arg + 1];
	  argc --;
	  
	  ptr = argv[i];
	}
      else
	ptr += sizeof SWI_SWITCH;

      swi_mask = 0;
      
      while (* ptr)
	{
	  int i;

	  for (i = sizeof options / sizeof options[0]; i--;)
	    if (strncmp (ptr, options[i].swi_option,
			 strlen (options[i].swi_option)) == 0)
	      {
		swi_mask |= options[i].swi_mask;
		ptr += strlen (options[i].swi_option);

		if (* ptr == ',')
		  ++ ptr;

		break;
	      }

	  if (i < 0)
	    break;
	}

      if (* ptr != 0)
	fprintf (stderr, "Ignoring swi options: %s\n", ptr);
      
      /* Remove this option from the argv array.  */
      for (arg = i; arg < argc; arg ++)
	argv[arg] = argv[arg + 1];
      argc --;
      i --;
    }
  return argc;
}

static void
sim_target_parse_arg_array (argv)
     char ** argv;
{
  int i;

  for (i = 0; argv[i]; i++)
    ;

  return (void) sim_target_parse_command_line (i, argv);
}

void
sim_target_display_usage ()
{
  fprintf (stderr, "%s=<list>  Comma seperated list of SWI protocols to supoport.\n\
                This list can contain: NONE, DEMON, ANGEL, REDBOOT and/or ALL.\n",
	   SWI_SWITCH);
}
#endif

SIM_DESC
sim_open (kind, ptr, abfd, argv)
     SIM_OPEN_KIND kind;
     host_callback *ptr;
     struct bfd *abfd;
     char **argv;
{
  sim_kind = kind;
  if (myname) free (myname);
  myname = (char *) xstrdup (argv[0]);
  sim_callback = ptr;

#ifdef SIM_TARGET_SWITCHES
  sim_target_parse_arg_array (argv);
#endif
  
  /* Decide upon the endian-ness of the processor.
     If we can, get the information from the bfd itself.
     Otherwise look to see if we have been given a command
     line switch that tells us.  Otherwise default to little endian.  */
  if (abfd != NULL)
    big_endian = bfd_big_endian (abfd);
  else if (argv[1] != NULL)
    {
      int i;

      /* Scan for endian-ness and memory-size switches.  */
      for (i = 0; (argv[i] != NULL) && (argv[i][0] != 0); i++)
	if (argv[i][0] == '-' && argv[i][1] == 'E')
	  {
	    char c;

	    if ((c = argv[i][2]) == 0)
	      {
		++i;
		c = argv[i][0];
	      }

	    switch (c)
	      {
	      case 0:
		sim_callback->printf_filtered
		  (sim_callback, "No argument to -E option provided\n");
		break;

	      case 'b':
	      case 'B':
		big_endian = 1;
		break;

	      case 'l':
	      case 'L':
		big_endian = 0;
		break;

	      default:
		sim_callback->printf_filtered
		  (sim_callback, "Unrecognised argument to -E option\n");
		break;
	      }
	  }
	else if (argv[i][0] == '-' && argv[i][1] == 'm')
	  {
	    if (argv[i][2] != '\0')
	      sim_size (atoi (&argv[i][2]));
	    else if (argv[i + 1] != NULL)
	      {
		sim_size (atoi (argv[i + 1]));
		i++;
	      }
	    else
	      {
		sim_callback->printf_filtered (sim_callback,
					       "Missing argument to -m option\n");
		return NULL;
	      }
	      
	  }
    }

  return (SIM_DESC) 1;
}

void
sim_close (sd, quitting)
     SIM_DESC sd ATTRIBUTE_UNUSED;
     int quitting ATTRIBUTE_UNUSED;
{
  if (myname)
    free (myname);
  myname = NULL;
}

SIM_RC
sim_load (sd, prog, abfd, from_tty)
     SIM_DESC sd;
     char *prog;
     bfd *abfd;
     int from_tty ATTRIBUTE_UNUSED;
{
  bfd *prog_bfd;

  prog_bfd = sim_load_file (sd, myname, sim_callback, prog, abfd,
			    sim_kind == SIM_OPEN_DEBUG, 0, sim_write);
  if (prog_bfd == NULL)
    return SIM_RC_FAIL;
  ARMul_SetPC (state, bfd_get_start_address (prog_bfd));
  if (abfd == NULL)
    bfd_close (prog_bfd);
  return SIM_RC_OK;
}

void
sim_stop_reason (sd, reason, sigrc)
     SIM_DESC sd ATTRIBUTE_UNUSED;
     enum sim_stop *reason;
     int *sigrc;
{
  if (stop_simulator)
    {
      *reason = sim_stopped;
      *sigrc = SIGINT;
    }
  else if (state->EndCondition == 0)
    {
      *reason = sim_exited;
      *sigrc = state->Reg[0] & 255;
    }
  else
    {
      *reason = sim_stopped;
      if (state->EndCondition == RDIError_BreakpointReached)
	*sigrc = SIGTRAP;
      else if (   state->EndCondition == RDIError_DataAbort
	       || state->EndCondition == RDIError_AddressException)
	*sigrc = SIGBUS;
      else
	*sigrc = 0;
    }
}

void
sim_do_command (sd, cmd)
     SIM_DESC sd ATTRIBUTE_UNUSED;
     char *cmd ATTRIBUTE_UNUSED;
{  
  (*sim_callback->printf_filtered)
    (sim_callback,
     "This simulator does not accept any commands.\n");
}

void
sim_set_callbacks (ptr)
     host_callback *ptr;
{
  sim_callback = ptr;
}