path: root/sim/common/sim-trace.c

/* Simulator tracing/debugging support.
   Copyright (C) 1997, 1998, 2001, 2007, 2008, 2009, 2010
   Free Software Foundation, Inc.
   Contributed by Cygnus Support.

This file is part of GDB, the GNU debugger.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "sim-main.h"
#include "sim-io.h"
#include "sim-options.h"
#include "sim-fpu.h"

#include "bfd.h"
#include "libiberty.h"

#include "sim-assert.h"

#ifdef HAVE_STRING_H
#include <string.h>
#else
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif

#ifndef SIZE_PHASE
#define SIZE_PHASE 8
#endif

#ifndef SIZE_LOCATION
#define SIZE_LOCATION 20
#endif

#ifndef SIZE_PC
#define SIZE_PC 6
#endif

#ifndef SIZE_LINE_NUMBER
#define SIZE_LINE_NUMBER 4
#endif

static MODULE_INIT_FN trace_init;
static MODULE_UNINSTALL_FN trace_uninstall;

static DECLARE_OPTION_HANDLER (trace_option_handler);

enum {
  OPTION_TRACE_INSN	= OPTION_START,
  OPTION_TRACE_DECODE,
  OPTION_TRACE_EXTRACT,
  OPTION_TRACE_LINENUM,
  OPTION_TRACE_MEMORY,
  OPTION_TRACE_MODEL,
  OPTION_TRACE_ALU,
  OPTION_TRACE_CORE,
  OPTION_TRACE_EVENTS,
  OPTION_TRACE_FPU,
  OPTION_TRACE_BRANCH,
  OPTION_TRACE_SEMANTICS,
  OPTION_TRACE_RANGE,
  OPTION_TRACE_FUNCTION,
  OPTION_TRACE_DEBUG,
  OPTION_TRACE_FILE,
  OPTION_TRACE_VPU
};

static const OPTION trace_options[] =
{
  /* This table is organized to group related instructions together.  */
  { {"trace", optional_argument, NULL, 't'},
      't', "on|off", "Trace useful things",
      trace_option_handler },
  { {"trace-insn", optional_argument, NULL, OPTION_TRACE_INSN},
      '\0', "on|off", "Perform instruction tracing",
      trace_option_handler },
  { {"trace-decode", optional_argument, NULL, OPTION_TRACE_DECODE},
      '\0', "on|off", "Trace instruction decoding",
      trace_option_handler },
  { {"trace-extract", optional_argument, NULL, OPTION_TRACE_EXTRACT},
      '\0', "on|off", "Trace instruction extraction",
      trace_option_handler },
  { {"trace-linenum", optional_argument, NULL, OPTION_TRACE_LINENUM},
      '\0', "on|off", "Perform line number tracing (implies --trace-insn)",
      trace_option_handler },
  { {"trace-memory", optional_argument, NULL, OPTION_TRACE_MEMORY},
      '\0', "on|off", "Trace memory operations",
      trace_option_handler },
  { {"trace-alu", optional_argument, NULL, OPTION_TRACE_ALU},
      '\0', "on|off", "Trace ALU operations",
      trace_option_handler },
  { {"trace-fpu", optional_argument, NULL, OPTION_TRACE_FPU},
      '\0', "on|off", "Trace FPU operations",
      trace_option_handler },
  { {"trace-vpu", optional_argument, NULL, OPTION_TRACE_VPU},
      '\0', "on|off", "Trace VPU operations",
      trace_option_handler },
  { {"trace-branch", optional_argument, NULL, OPTION_TRACE_BRANCH},
      '\0', "on|off", "Trace branching",
      trace_option_handler },
  { {"trace-semantics", optional_argument, NULL, OPTION_TRACE_SEMANTICS},
      '\0', "on|off", "Perform ALU, FPU, MEMORY, and BRANCH tracing",
      trace_option_handler },
  { {"trace-model", optional_argument, NULL, OPTION_TRACE_MODEL},
      '\0', "on|off", "Include model performance data",
      trace_option_handler },
  { {"trace-core", optional_argument, NULL, OPTION_TRACE_CORE},
      '\0', "on|off", "Trace core operations",
      trace_option_handler },
  { {"trace-events", optional_argument, NULL, OPTION_TRACE_EVENTS},
      '\0', "on|off", "Trace events",
      trace_option_handler },
#ifdef SIM_HAVE_ADDR_RANGE
  { {"trace-range", required_argument, NULL, OPTION_TRACE_RANGE},
      '\0', "START,END", "Specify range of addresses for instruction tracing",
      trace_option_handler },
#if 0 /*wip*/
  { {"trace-function", required_argument, NULL, OPTION_TRACE_FUNCTION},
      '\0', "FUNCTION", "Specify function to trace",
      trace_option_handler },
#endif
#endif
  { {"trace-debug", optional_argument, NULL, OPTION_TRACE_DEBUG},
      '\0', "on|off", "Add information useful for debugging the simulator to the tracing output",
      trace_option_handler },
  { {"trace-file", required_argument, NULL, OPTION_TRACE_FILE},
      '\0', "FILE NAME", "Specify tracing output file",
      trace_option_handler },
  { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL }
};

/* Set/reset the trace options indicated in MASK.  */

static SIM_RC
set_trace_option_mask (SIM_DESC sd, const char *name, int mask, const char *arg)
{
  int trace_nr;
  int cpu_nr;
  int trace_val = 1;

  if (arg != NULL)
    {
      if (strcmp (arg, "yes") == 0
	  || strcmp (arg, "on") == 0
	  || strcmp (arg, "1") == 0)
	trace_val = 1;
      else if (strcmp (arg, "no") == 0
	       || strcmp (arg, "off") == 0
	       || strcmp (arg, "0") == 0)
	trace_val = 0;
      else
	{
	  sim_io_eprintf (sd, "Argument `%s' for `--trace%s' invalid, one of `on', `off', `yes', `no' expected\n", arg, name);
	  return SIM_RC_FAIL;
	}
    }

  /* update applicable trace bits */
  for (trace_nr = 0; trace_nr < MAX_TRACE_VALUES; ++trace_nr)
    {
      if ((mask & (1 << trace_nr)) == 0)
	continue;

      /* Set non-cpu specific values.  */
      switch (trace_nr)
	{
	case TRACE_EVENTS_IDX:
	  STATE_EVENTS (sd)->trace = trace_val;
	  break;
	case TRACE_DEBUG_IDX:
	  STATE_TRACE_FLAGS (sd)[trace_nr] = trace_val;
	  break;
	}

      /* Set cpu values.  */
      for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; cpu_nr++)
	{
	  CPU_TRACE_FLAGS (STATE_CPU (sd, cpu_nr))[trace_nr] = trace_val;
	}
    }

  /* Re-compute the cpu trace summary.  */
  if (trace_val)
    {
      for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; cpu_nr++)
	CPU_TRACE_DATA (STATE_CPU (sd, cpu_nr))->trace_any_p = 1;
    }
  else
    {
      for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; cpu_nr++)
	{
	  CPU_TRACE_DATA (STATE_CPU (sd, cpu_nr))->trace_any_p = 0;
	  for (trace_nr = 0; trace_nr < MAX_TRACE_VALUES; ++trace_nr)
	    {
	      if (CPU_TRACE_FLAGS (STATE_CPU (sd, cpu_nr))[trace_nr])
		{
		  CPU_TRACE_DATA (STATE_CPU (sd, cpu_nr))->trace_any_p = 1;
		  break;
		}
	    }
	}
    }  

  return SIM_RC_OK;
}

/* Set one trace option based on its IDX value.  */

static SIM_RC
set_trace_option (SIM_DESC sd, const char *name, int idx, const char *arg)
{
  return set_trace_option_mask (sd, name, 1 << idx, arg);
}


static SIM_RC
trace_option_handler (SIM_DESC sd, sim_cpu *cpu, int opt,
		      char *arg, int is_command)
{
  int n;

  switch (opt)
    {
    case 't' :
      if (! WITH_TRACE)
	sim_io_eprintf (sd, "Tracing not compiled in, `-t' ignored\n");
      else
	return set_trace_option_mask (sd, "trace", TRACE_USEFUL_MASK, arg);
      break;

    case OPTION_TRACE_INSN :
      if (WITH_TRACE_INSN_P)
	return set_trace_option (sd, "-insn", TRACE_INSN_IDX, arg);
      else
	sim_io_eprintf (sd, "Instruction tracing not compiled in, `--trace-insn' ignored\n");
      break;

    case OPTION_TRACE_DECODE :
      if (WITH_TRACE_DECODE_P)
	return set_trace_option (sd, "-decode", TRACE_DECODE_IDX, arg);
      else
	sim_io_eprintf (sd, "Decode tracing not compiled in, `--trace-decode' ignored\n");
      break;

    case OPTION_TRACE_EXTRACT :
      if (WITH_TRACE_EXTRACT_P)
	return set_trace_option (sd, "-extract", TRACE_EXTRACT_IDX, arg);
      else
	sim_io_eprintf (sd, "Extract tracing not compiled in, `--trace-extract' ignored\n");
      break;

    case OPTION_TRACE_LINENUM :
      if (WITH_TRACE_LINENUM_P && WITH_TRACE_INSN_P)
	{
	  if (set_trace_option (sd, "-linenum", TRACE_LINENUM_IDX, arg) != SIM_RC_OK
	      || set_trace_option (sd, "-linenum", TRACE_INSN_IDX, arg) != SIM_RC_OK)
	    return SIM_RC_FAIL;
	}
      else
	sim_io_eprintf (sd, "Line number or instruction tracing not compiled in, `--trace-linenum' ignored\n");
      break;

    case OPTION_TRACE_MEMORY :
      if (WITH_TRACE_MEMORY_P)
	return set_trace_option (sd, "-memory", TRACE_MEMORY_IDX, arg);
      else
	sim_io_eprintf (sd, "Memory tracing not compiled in, `--trace-memory' ignored\n");
      break;

    case OPTION_TRACE_MODEL :
      if (WITH_TRACE_MODEL_P)
	return set_trace_option (sd, "-model", TRACE_MODEL_IDX, arg);
      else
	sim_io_eprintf (sd, "Model tracing not compiled in, `--trace-model' ignored\n");
      break;

    case OPTION_TRACE_ALU :
      if (WITH_TRACE_ALU_P)
	return set_trace_option (sd, "-alu", TRACE_ALU_IDX, arg);
      else
	sim_io_eprintf (sd, "ALU tracing not compiled in, `--trace-alu' ignored\n");
      break;

    case OPTION_TRACE_CORE :
      if (WITH_TRACE_CORE_P)
	return set_trace_option (sd, "-core", TRACE_CORE_IDX, arg);
      else
	sim_io_eprintf (sd, "CORE tracing not compiled in, `--trace-core' ignored\n");
      break;

    case OPTION_TRACE_EVENTS :
      if (WITH_TRACE_EVENTS_P)
	return set_trace_option (sd, "-events", TRACE_EVENTS_IDX, arg);
      else
	sim_io_eprintf (sd, "EVENTS tracing not compiled in, `--trace-events' ignored\n");
      break;

    case OPTION_TRACE_FPU :
      if (WITH_TRACE_FPU_P)
	return set_trace_option (sd, "-fpu", TRACE_FPU_IDX, arg);
      else
	sim_io_eprintf (sd, "FPU tracing not compiled in, `--trace-fpu' ignored\n");
      break;

    case OPTION_TRACE_VPU :
      if (WITH_TRACE_VPU_P)
	return set_trace_option (sd, "-vpu", TRACE_VPU_IDX, arg);
      else
	sim_io_eprintf (sd, "VPU tracing not compiled in, `--trace-vpu' ignored\n");
      break;

    case OPTION_TRACE_BRANCH :
      if (WITH_TRACE_BRANCH_P)
	return set_trace_option (sd, "-branch", TRACE_BRANCH_IDX, arg);
      else
	sim_io_eprintf (sd, "Branch tracing not compiled in, `--trace-branch' ignored\n");
      break;

    case OPTION_TRACE_SEMANTICS :
      if (WITH_TRACE_ALU_P
	  && WITH_TRACE_FPU_P
	  && WITH_TRACE_MEMORY_P
	  && WITH_TRACE_BRANCH_P)
	{
	  if (set_trace_option (sd, "-semantics", TRACE_ALU_IDX, arg) != SIM_RC_OK
	      || set_trace_option (sd, "-semantics", TRACE_FPU_IDX, arg) != SIM_RC_OK
	      || set_trace_option (sd, "-semantics", TRACE_VPU_IDX, arg) != SIM_RC_OK
	      || set_trace_option (sd, "-semantics", TRACE_MEMORY_IDX, arg) != SIM_RC_OK
	      || set_trace_option (sd, "-semantics", TRACE_BRANCH_IDX, arg) != SIM_RC_OK)
	    return SIM_RC_FAIL;
	}
      else
	sim_io_eprintf (sd, "Alu, fpu, memory, and/or branch tracing not compiled in, `--trace-semantics' ignored\n");
      break;

#ifdef SIM_HAVE_ADDR_RANGE
    case OPTION_TRACE_RANGE :
      if (WITH_TRACE)
	{
	  int cpu_nr;
	  char *chp = arg;
	  unsigned long start,end;
	  start = strtoul (chp, &chp, 0);
	  if (*chp != ',')
	    {
	      sim_io_eprintf (sd, "--trace-range missing END argument\n");
	      return SIM_RC_FAIL;
	    }
	  end = strtoul (chp + 1, NULL, 0);
	  /* FIXME: Argument validation.  */
	  if (cpu != NULL)
	    sim_addr_range_add (TRACE_RANGE (CPU_PROFILE_DATA (cpu)),
				start, end);
	  else
	    for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; ++cpu_nr)
	      sim_addr_range_add (TRACE_RANGE (CPU_TRACE_DATA (STATE_CPU (sd, cpu_nr))),
				  start, end);
	}
      else
	sim_io_eprintf (sd, "Tracing not compiled in, `--trace-range' ignored\n");
      break;

    case OPTION_TRACE_FUNCTION :
      if (WITH_TRACE)
	{
	  /*wip: need to compute function range given name*/
	}
      else
	sim_io_eprintf (sd, "Tracing not compiled in, `--trace-function' ignored\n");
      break;
#endif /* SIM_HAVE_ADDR_RANGE */

    case OPTION_TRACE_DEBUG :
      if (WITH_TRACE_DEBUG_P)
	return set_trace_option (sd, "-debug", TRACE_DEBUG_IDX, arg);
      else
	sim_io_eprintf (sd, "Tracing debug support not compiled in, `--trace-debug' ignored\n");
      break;

    case OPTION_TRACE_FILE :
      if (! WITH_TRACE)
	sim_io_eprintf (sd, "Tracing not compiled in, `--trace-file' ignored\n");
      else
	{
	  FILE *f = fopen (arg, "w");

	  if (f == NULL)
	    {
	      sim_io_eprintf (sd, "Unable to open trace output file `%s'\n", arg);
	      return SIM_RC_FAIL;
	    }
	  for (n = 0; n < MAX_NR_PROCESSORS; ++n)
	    TRACE_FILE (CPU_TRACE_DATA (STATE_CPU (sd, n))) = f;
	  TRACE_FILE (STATE_TRACE_DATA (sd)) = f;
	}
      break;
    }

  return SIM_RC_OK;
}

/* Install tracing support.  */

SIM_RC
trace_install (SIM_DESC sd)
{
  int i;

  SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);

  sim_add_option_table (sd, NULL, trace_options);
  memset (STATE_TRACE_DATA (sd), 0, sizeof (* STATE_TRACE_DATA (sd)));
  for (i = 0; i < MAX_NR_PROCESSORS; ++i)
    memset (CPU_TRACE_DATA (STATE_CPU (sd, i)), 0,
	    sizeof (* CPU_TRACE_DATA (STATE_CPU (sd, i))));
  sim_module_add_init_fn (sd, trace_init);
  sim_module_add_uninstall_fn (sd, trace_uninstall);
  return SIM_RC_OK;
}

static SIM_RC
trace_init (SIM_DESC sd)
{
#ifdef SIM_HAVE_ADDR_RANGE
  /* Check if a range has been specified without specifying what to
     collect.  */
  {
    int i;

    for (i = 0; i < MAX_NR_PROCESSORS; ++i)
      {
	sim_cpu *cpu = STATE_CPU (sd, i);

	if (ADDR_RANGE_RANGES (TRACE_RANGE (CPU_TRACE_DATA (cpu)))
	    && ! TRACE_INSN_P (cpu))
	  {
	    sim_io_eprintf_cpu (cpu, "Tracing address range specified without --trace-insn.\n");
	    sim_io_eprintf_cpu (cpu, "Address range ignored.\n");
	    sim_addr_range_delete (TRACE_RANGE (CPU_TRACE_DATA (cpu)),
				   0, ~ (address_word) 0);
	  }
      }
  }
#endif

  return SIM_RC_OK;
}

static void
trace_uninstall (SIM_DESC sd)
{
  int i,j;
  FILE *sfile = TRACE_FILE (STATE_TRACE_DATA (sd));

  if (sfile != NULL)
    fclose (sfile);

  for (i = 0; i < MAX_NR_PROCESSORS; ++i)
    {
      FILE *cfile = TRACE_FILE (CPU_TRACE_DATA (STATE_CPU (sd, i)));
      if (cfile != NULL && cfile != sfile)
	{
	  /* If output from different cpus is going to the same file,
	     avoid closing the file twice.  */
	  for (j = 0; j < i; ++j)
	    if (TRACE_FILE (CPU_TRACE_DATA (STATE_CPU (sd, j))) == cfile)
	      break;
	  if (i == j)
	    fclose (cfile);
	}
    }
}

typedef enum {
  trace_fmt_invalid,
  trace_fmt_word,
  trace_fmt_fp,
  trace_fmt_fpu,
  trace_fmt_string,
  trace_fmt_bool,
  trace_fmt_addr,
  trace_fmt_instruction_incomplete,
} data_fmt;

/* compute the nr of trace data units consumed by data */
static int
save_data_size (TRACE_DATA *data,
		long size)
{
  return ((size + sizeof (TRACE_INPUT_DATA (data) [0]) - 1)
	  / sizeof (TRACE_INPUT_DATA (data) [0]));
}


/* Archive DATA into the trace buffer */
static void
save_data (SIM_DESC sd,
	   TRACE_DATA *data,
	   data_fmt fmt,
	   long size,
	   const void *buf)
{
  int i = TRACE_INPUT_IDX (data);
  if (i == sizeof (TRACE_INPUT_FMT (data)))
    sim_io_error (sd, "trace buffer overflow");
  TRACE_INPUT_FMT (data) [i] = fmt;
  TRACE_INPUT_SIZE (data) [i] = size;
  memcpy (&TRACE_INPUT_DATA (data) [i], buf, size);
  i += save_data_size (data, size);
  TRACE_INPUT_IDX (data) = i;
}

static void
print_data (SIM_DESC sd,
	    sim_cpu *cpu,
	    data_fmt fmt,
	    long size,
	    void *data)
{
  switch (fmt)
    {
    case trace_fmt_instruction_incomplete:
      trace_printf (sd, cpu, " (instruction incomplete)");
      break;
    case trace_fmt_word:
    case trace_fmt_addr:
      {
	switch (size)
	  {
	  case sizeof (unsigned32):
	    trace_printf (sd, cpu, " 0x%08lx", (long) * (unsigned32*) data);
	    break;
	  case sizeof (unsigned64):
	    trace_printf (sd, cpu, " 0x%08lx%08lx",
			  (long) ((* (unsigned64*) data) >> 32),
			  (long) * (unsigned64*) data);
	    break;
	  default:
	    abort ();
	  }
	break;
      }
    case trace_fmt_bool:
      {
	SIM_ASSERT (size == sizeof (int));
	trace_printf (sd, cpu, " %-8s",
		      (* (int*) data) ? "true" : "false");
	break;
      }
    case trace_fmt_fp:
      {
	sim_fpu fp;
	switch (size)
	  {
	    /* FIXME: Assumes sizeof float == 4; sizeof double == 8 */
	  case 4:
	    sim_fpu_32to (&fp, *(unsigned32*)data);
	    break;
	  case 8:
	    sim_fpu_64to (&fp, *(unsigned64*)data);
	    break;
	  default:
	    abort ();
	  }
	trace_printf (sd, cpu, " %8g", sim_fpu_2d (&fp));
	switch (size)
	  {
	  case 4:
	    trace_printf (sd, cpu, " (0x%08lx)",
			  (long) *(unsigned32*)data);
	    break;
	  case 8:
	    trace_printf (sd, cpu, " (0x%08lx%08lx)",
			  (long) (*(unsigned64*)data >> 32),
			  (long) (*(unsigned64*)data));
	    break;
	  default:
	    abort ();
	  }
	break;
      }
    case trace_fmt_fpu:
      /* FIXME: At present sim_fpu data is stored as a double */
      trace_printf (sd, cpu, " %8g", * (double*) data);
      break;
    case trace_fmt_string:
      trace_printf (sd, cpu, " %-8s", (char*) data);
      break;
    default:
      abort ();
    }
}
		  
static const char *
trace_idx_to_str (int trace_idx)
{
  static char num[8];
  switch (trace_idx)
    {
    case TRACE_ALU_IDX:     return "alu:     ";
    case TRACE_INSN_IDX:    return "insn:    ";
    case TRACE_DECODE_IDX:  return "decode:  ";
    case TRACE_EXTRACT_IDX: return "extract: ";
    case TRACE_MEMORY_IDX:  return "memory:  ";
    case TRACE_CORE_IDX:    return "core:    ";
    case TRACE_EVENTS_IDX:  return "events:  ";
    case TRACE_FPU_IDX:     return "fpu:     ";
    case TRACE_BRANCH_IDX:  return "branch:  ";
    case TRACE_VPU_IDX:     return "vpu:     ";
    default:
      sprintf (num, "?%d?", trace_idx);
      return num;
    }
}

static void
trace_results (SIM_DESC sd,
	       sim_cpu *cpu,
	       int trace_idx,
	       int last_input)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  int nr_out;
  int i;

  /* cross check trace_idx against TRACE_IDX (data)? */

  /* prefix */
  trace_printf (sd, cpu, "%s %s",
		trace_idx_to_str (TRACE_IDX (data)),
		TRACE_PREFIX (data));
  TRACE_IDX (data) = 0;

  for (i = 0, nr_out = 0;
       i < TRACE_INPUT_IDX (data);
       i += save_data_size (data, TRACE_INPUT_SIZE (data) [i]), nr_out++)
    {
      if (i == last_input)
	{
	  int pad = (strlen (" 0x") + sizeof (unsigned_word) * 2);
	  int padding = pad * (3 - nr_out);
	  if (padding < 0)
	    padding = 0;
	  padding += strlen (" ::");
	  trace_printf (sd, cpu, "%*s", padding, " ::");
	}
      print_data (sd, cpu,
		  TRACE_INPUT_FMT (data) [i],
		  TRACE_INPUT_SIZE (data) [i],
		  &TRACE_INPUT_DATA (data) [i]);
    }
  trace_printf (sd, cpu, "\n");
}

void
trace_prefix (SIM_DESC sd,
	      sim_cpu *cpu,
	      sim_cia cia,
	      address_word pc,
	      int line_p,
	      const char *filename,
	      int linenum,
	      const char *fmt,
	      ...)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  va_list ap;
  char *prefix = TRACE_PREFIX (data);
  char *chp;
 /* FIXME: The TRACE_PREFIX_WIDTH should be determined at build time using
    known information about the disassembled instructions. */
#ifndef TRACE_PREFIX_WIDTH
#define TRACE_PREFIX_WIDTH 48
#endif
  int width = TRACE_PREFIX_WIDTH;

  /* if the previous trace data wasn't flushed, flush it now with a
     note indicating that the trace was incomplete. */
  if (TRACE_IDX (data) != 0)
    {
      int last_input = TRACE_INPUT_IDX (data);
      save_data (sd, data, trace_fmt_instruction_incomplete, 1, "");
      trace_results (sd, cpu, TRACE_IDX (data), last_input);
    }
  TRACE_IDX (data) = 0;
  TRACE_INPUT_IDX (data) = 0;

  /* Create the text prefix for this new instruction: */
  if (!line_p)
    {
      if (filename)
	{
	  sprintf (prefix, "%s:%-*d 0x%.*lx ",
		   filename,
		   SIZE_LINE_NUMBER, linenum,
		   SIZE_PC, (long) pc);
	}
      else
	{
	  sprintf (prefix, "0x%.*lx ",
		   SIZE_PC, (long) pc);
	  /* Shrink the width by the amount that we didn't print.  */
	  width -= SIZE_LINE_NUMBER + SIZE_PC + 8;
	}
      chp = strchr (prefix, '\0');
      va_start (ap, fmt);
      vsprintf (chp, fmt, ap);
      va_end (ap);
    }
  else
    {
      char buf[256];
      buf[0] = 0;
      if (STATE_TEXT_SECTION (CPU_STATE (cpu))
	  && pc >= STATE_TEXT_START (CPU_STATE (cpu))
	  && pc < STATE_TEXT_END (CPU_STATE (cpu)))
	{
	  const char *pc_filename = (const char *)0;
	  const char *pc_function = (const char *)0;
	  unsigned int pc_linenum = 0;
	  bfd *abfd;
	  asymbol **asymbols;

	  abfd = STATE_PROG_BFD (CPU_STATE (cpu));
	  asymbols = STATE_PROG_SYMS (CPU_STATE (cpu));
	  if (asymbols == NULL)
	    {
	      long symsize;
	      long symbol_count;

	      symsize = bfd_get_symtab_upper_bound (abfd);
	      if (symsize < 0)
		{
		  sim_engine_abort (sd, cpu, cia, "could not read symbols");
		}
	      asymbols = (asymbol **) xmalloc (symsize);
	      symbol_count = bfd_canonicalize_symtab (abfd, asymbols);
	      if (symbol_count < 0)
		{
		  sim_engine_abort (sd, cpu, cia, "could not canonicalize symbols");
		}
	      STATE_PROG_SYMS (CPU_STATE (cpu)) = asymbols;
	    }

	  if (bfd_find_nearest_line (abfd,
				     STATE_TEXT_SECTION (CPU_STATE (cpu)),
				     asymbols,
				     pc - STATE_TEXT_START (CPU_STATE (cpu)),
				     &pc_filename, &pc_function, &pc_linenum))
	    {
	      char *p = buf;
	      if (pc_linenum)
		{
		  sprintf (p, "#%-*d ", SIZE_LINE_NUMBER, pc_linenum);
		  p += strlen (p);
		}
	      else
		{
		  sprintf (p, "%-*s ", SIZE_LINE_NUMBER+1, "---");
		  p += SIZE_LINE_NUMBER+2;
		}

	      if (pc_function)
		{
		  sprintf (p, "%s ", pc_function);
		  p += strlen (p);
		}
	      else if (pc_filename)
		{
		  char *q = (char *) strrchr (pc_filename, '/');
		  sprintf (p, "%s ", (q) ? q+1 : pc_filename);
		  p += strlen (p);
		}

	      if (*p == ' ')
		*p = '\0';
	    }
	}

      sprintf (prefix, "0x%.*x %-*.*s ",
	       SIZE_PC, (unsigned) pc,
	       SIZE_LOCATION, SIZE_LOCATION, buf);
      chp = strchr (prefix, '\0');
      va_start (ap, fmt);
      vsprintf (chp, fmt, ap);
      va_end (ap);
    }

  /* Pad it out to TRACE_PREFIX_WIDTH.  */
  chp = strchr (prefix, '\0');
  if (chp - prefix < width)
    {
      memset (chp, ' ', width - (chp - prefix));
      chp = &prefix [width];
      *chp = '\0';
    }
  strcpy (chp, " -");

  /* check that we've not over flowed the prefix buffer */
  if (strlen (prefix) >= sizeof (TRACE_PREFIX (data)))
    abort ();
}

void
trace_generic (SIM_DESC sd,
	       sim_cpu *cpu,
	       int trace_idx,
	       const char *fmt,
	       ...)
{
  va_list ap;
  trace_printf (sd, cpu, "%s %s",
		trace_idx_to_str (trace_idx),
		TRACE_PREFIX (CPU_TRACE_DATA (cpu)));
  va_start (ap, fmt);
  trace_vprintf (sd, cpu, fmt, ap);
  va_end (ap);
  trace_printf (sd, cpu, "\n");
}

void
trace_input0 (SIM_DESC sd,
	      sim_cpu *cpu,
	      int trace_idx)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  TRACE_IDX (data) = trace_idx;
}

void
trace_input_word1 (SIM_DESC sd,
		   sim_cpu *cpu,
		   int trace_idx,
		   unsigned_word d0)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  TRACE_IDX (data) = trace_idx;
  save_data (sd, data, trace_fmt_word, sizeof (unsigned_word), &d0);
}

void
trace_input_word2 (SIM_DESC sd,
		   sim_cpu *cpu,
		   int trace_idx,
		   unsigned_word d0,
		   unsigned_word d1)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  TRACE_IDX (data) = trace_idx;
  save_data (sd, data, trace_fmt_word, sizeof (unsigned_word), &d0);
  save_data (sd, data, trace_fmt_word, sizeof (unsigned_word), &d1);
}

void
trace_input_word3 (SIM_DESC sd,
		   sim_cpu *cpu,
		   int trace_idx,
		   unsigned_word d0,
		   unsigned_word d1,
		   unsigned_word d2)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  TRACE_IDX (data) = trace_idx;
  save_data (sd, data, trace_fmt_word, sizeof (unsigned_word), &d0);
  save_data (sd, data, trace_fmt_word, sizeof (unsigned_word), &d1);
  save_data (sd, data, trace_fmt_word, sizeof (unsigned_word), &d2);
}

void
trace_input_word4 (SIM_DESC sd,
		   sim_cpu *cpu,
		   int trace_idx,
		   unsigned_word d0,
		   unsigned_word d1,
		   unsigned_word d2,
		   unsigned_word d3)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  TRACE_IDX (data) = trace_idx;
  save_data (sd, data, trace_fmt_word, sizeof (d0), &d0);
  save_data (sd, data, trace_fmt_word, sizeof (d1), &d1);
  save_data (sd, data, trace_fmt_word, sizeof (d2), &d2);
  save_data (sd, data, trace_fmt_word, sizeof (d3), &d3);
}

void
trace_input_bool1 (SIM_DESC sd,
		   sim_cpu *cpu,
		   int trace_idx,
		   int d0)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  TRACE_IDX (data) = trace_idx;
  save_data (sd, data, trace_fmt_bool, sizeof (d0), &d0);
}

void
trace_input_addr1 (SIM_DESC sd,
		   sim_cpu *cpu,
		   int trace_idx,
		   address_word d0)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  TRACE_IDX (data) = trace_idx;
  save_data (sd, data, trace_fmt_addr, sizeof (d0), &d0);
}

void
trace_input_fp1 (SIM_DESC sd,
		 sim_cpu *cpu,
		 int trace_idx,
		 fp_word f0)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  TRACE_IDX (data) = trace_idx;
  save_data (sd, data, trace_fmt_fp, sizeof (fp_word), &f0);
}

void
trace_input_fp2 (SIM_DESC sd,
		 sim_cpu *cpu,
		 int trace_idx,
		 fp_word f0,
		 fp_word f1)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  TRACE_IDX (data) = trace_idx;
  save_data (sd, data, trace_fmt_fp, sizeof (fp_word), &f0);
  save_data (sd, data, trace_fmt_fp, sizeof (fp_word), &f1);
}

void
trace_input_fp3 (SIM_DESC sd,
		 sim_cpu *cpu,
		 int trace_idx,
		 fp_word f0,
		 fp_word f1,
		 fp_word f2)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  TRACE_IDX (data) = trace_idx;
  save_data (sd, data, trace_fmt_fp, sizeof (fp_word), &f0);
  save_data (sd, data, trace_fmt_fp, sizeof (fp_word), &f1);
  save_data (sd, data, trace_fmt_fp, sizeof (fp_word), &f2);
}

void
trace_input_fpu1 (SIM_DESC sd,
		  sim_cpu *cpu,
		  int trace_idx,
		  sim_fpu *f0)
{
  double d;
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  TRACE_IDX (data) = trace_idx;
  d = sim_fpu_2d (f0);
  save_data (sd, data, trace_fmt_fp, sizeof (double), &d);
}

void
trace_input_fpu2 (SIM_DESC sd,
		  sim_cpu *cpu,
		  int trace_idx,
		  sim_fpu *f0,
		  sim_fpu *f1)
{
  double d;
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  TRACE_IDX (data) = trace_idx;
  d = sim_fpu_2d (f0);
  save_data (sd, data, trace_fmt_fp, sizeof (double), &d);
  d = sim_fpu_2d (f1);
  save_data (sd, data, trace_fmt_fp, sizeof (double), &d);
}

void
trace_input_fpu3 (SIM_DESC sd,
		  sim_cpu *cpu,
		  int trace_idx,
		  sim_fpu *f0,
		  sim_fpu *f1,
		  sim_fpu *f2)
{
  double d;
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  TRACE_IDX (data) = trace_idx;
  d = sim_fpu_2d (f0);
  save_data (sd, data, trace_fmt_fp, sizeof (double), &d);
  d = sim_fpu_2d (f1);
  save_data (sd, data, trace_fmt_fp, sizeof (double), &d);
  d = sim_fpu_2d (f2);
  save_data (sd, data, trace_fmt_fp, sizeof (double), &d);
}

void
trace_result_word1 (SIM_DESC sd,
		    sim_cpu *cpu,
		    int trace_idx,
		    unsigned_word r0)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  int last_input;

  /* Append any results to the end of the inputs */
  last_input = TRACE_INPUT_IDX (data);
  save_data (sd, data, trace_fmt_word, sizeof (unsigned_word), &r0);

  trace_results (sd, cpu, trace_idx, last_input);
}	      

void
trace_result0 (SIM_DESC sd,
	       sim_cpu *cpu,
	       int trace_idx)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  int last_input;

  /* Append any results to the end of the inputs */
  last_input = TRACE_INPUT_IDX (data);

  trace_results (sd, cpu, trace_idx, last_input);
}	      

void
trace_result_word2 (SIM_DESC sd,
		    sim_cpu *cpu,
		    int trace_idx,
		    unsigned_word r0,
		    unsigned_word r1)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  int last_input;

  /* Append any results to the end of the inputs */
  last_input = TRACE_INPUT_IDX (data);
  save_data (sd, data, trace_fmt_word, sizeof (r0), &r0);
  save_data (sd, data, trace_fmt_word, sizeof (r1), &r1);

  trace_results (sd, cpu, trace_idx, last_input);
}	      

void
trace_result_word4 (SIM_DESC sd,
		    sim_cpu *cpu,
		    int trace_idx,
		    unsigned_word r0,
		    unsigned_word r1,
		    unsigned_word r2,
		    unsigned_word r3)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  int last_input;

  /* Append any results to the end of the inputs */
  last_input = TRACE_INPUT_IDX (data);
  save_data (sd, data, trace_fmt_word, sizeof (r0), &r0);
  save_data (sd, data, trace_fmt_word, sizeof (r1), &r1);
  save_data (sd, data, trace_fmt_word, sizeof (r2), &r2);
  save_data (sd, data, trace_fmt_word, sizeof (r3), &r3);

  trace_results (sd, cpu, trace_idx, last_input);
}	      

void
trace_result_bool1 (SIM_DESC sd,
		    sim_cpu *cpu,
		    int trace_idx,
		    int r0)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  int last_input;

  /* Append any results to the end of the inputs */
  last_input = TRACE_INPUT_IDX (data);
  save_data (sd, data, trace_fmt_bool, sizeof (r0), &r0);

  trace_results (sd, cpu, trace_idx, last_input);
}	      

void
trace_result_addr1 (SIM_DESC sd,
		    sim_cpu *cpu,
		    int trace_idx,
		    address_word r0)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  int last_input;

  /* Append any results to the end of the inputs */
  last_input = TRACE_INPUT_IDX (data);
  save_data (sd, data, trace_fmt_addr, sizeof (r0), &r0);

  trace_results (sd, cpu, trace_idx, last_input);
}	      

void
trace_result_fp1 (SIM_DESC sd,
		  sim_cpu *cpu,
		  int trace_idx,
		  fp_word f0)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  int last_input;

  /* Append any results to the end of the inputs */
  last_input = TRACE_INPUT_IDX (data);
  save_data (sd, data, trace_fmt_fp, sizeof (fp_word), &f0);

  trace_results (sd, cpu, trace_idx, last_input);
}	      

void
trace_result_fp2 (SIM_DESC sd,
		  sim_cpu *cpu,
		  int trace_idx,
		  fp_word f0,
		  fp_word f1)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  int last_input;

  /* Append any results to the end of the inputs */
  last_input = TRACE_INPUT_IDX (data);
  save_data (sd, data, trace_fmt_fp, sizeof (f0), &f0);
  save_data (sd, data, trace_fmt_fp, sizeof (f1), &f1);

  trace_results (sd, cpu, trace_idx, last_input);
}	      

void
trace_result_fpu1 (SIM_DESC sd,
		   sim_cpu *cpu,
		   int trace_idx,
		   sim_fpu *f0)
{
  double d;
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  int last_input;

  /* Append any results to the end of the inputs */
  last_input = TRACE_INPUT_IDX (data);
  d = sim_fpu_2d (f0);
  save_data (sd, data, trace_fmt_fp, sizeof (double), &d);

  trace_results (sd, cpu, trace_idx, last_input);
}	      

void
trace_result_string1 (SIM_DESC sd,
		      sim_cpu *cpu,
		      int trace_idx,
		      char *s0)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  int last_input;

  /* Append any results to the end of the inputs */
  last_input = TRACE_INPUT_IDX (data);
  save_data (sd, data, trace_fmt_string, strlen (s0) + 1, s0);

  trace_results (sd, cpu, trace_idx, last_input);
}	      

void
trace_result_word1_string1 (SIM_DESC sd,
			    sim_cpu *cpu,
			    int trace_idx,
			    unsigned_word r0,
			    char *s0)
{
  TRACE_DATA *data = CPU_TRACE_DATA (cpu);
  int last_input;

  /* Append any results to the end of the inputs */
  last_input = TRACE_INPUT_IDX (data);
  save_data (sd, data, trace_fmt_word, sizeof (unsigned_word), &r0);
  save_data (sd, data, trace_fmt_string, strlen (s0) + 1, s0);

  trace_results (sd, cpu, trace_idx, last_input);
}	      

void
trace_vprintf (SIM_DESC sd, sim_cpu *cpu, const char *fmt, va_list ap)
{
  if (cpu != NULL)
    {
      if (TRACE_FILE (CPU_TRACE_DATA (cpu)) != NULL)
	vfprintf (TRACE_FILE (CPU_TRACE_DATA (cpu)), fmt, ap);
      else
	sim_io_evprintf (sd, fmt, ap);
    }
  else
    {
      if (TRACE_FILE (STATE_TRACE_DATA (sd)) != NULL)
	vfprintf (TRACE_FILE (STATE_TRACE_DATA (sd)), fmt, ap);
      else
	sim_io_evprintf (sd, fmt, ap);
    }
}

/* The function trace_one_insn has been replaced by the function pair
   trace_prefix() + trace_generic().  It is still used. */
void
trace_one_insn (SIM_DESC sd, sim_cpu *cpu, address_word pc,
		int line_p, const char *filename, int linenum,
		const char *phase_wo_colon, const char *fmt,
		...)
{
  va_list ap;
  char phase[SIZE_PHASE+2];

  strncpy (phase, phase_wo_colon, SIZE_PHASE);
  strcat (phase, ":");

  if (!line_p)
    {
      trace_printf (sd, cpu, "%-*s %s:%-*d 0x%.*lx ",
		    SIZE_PHASE+1, phase,
		    filename,
		    SIZE_LINE_NUMBER, linenum,
		    SIZE_PC, (long)pc);
      va_start (ap, fmt);
      trace_vprintf (sd, cpu, fmt, ap);
      va_end (ap);
      trace_printf (sd, cpu, "\n");
    }
  else
    {
      char buf[256];

      buf[0] = 0;
      if (STATE_TEXT_SECTION (CPU_STATE (cpu))
	  && pc >= STATE_TEXT_START (CPU_STATE (cpu))
	  && pc < STATE_TEXT_END (CPU_STATE (cpu)))
	{
	  const char *pc_filename = (const char *)0;
	  const char *pc_function = (const char *)0;
	  unsigned int pc_linenum = 0;

	  if (bfd_find_nearest_line (STATE_PROG_BFD (CPU_STATE (cpu)),
				     STATE_TEXT_SECTION (CPU_STATE (cpu)),
				     (struct bfd_symbol **) 0,
				     pc - STATE_TEXT_START (CPU_STATE (cpu)),
				     &pc_filename, &pc_function, &pc_linenum))
	    {
	      char *p = buf;
	      if (pc_linenum)
		{
		  sprintf (p, "#%-*d ", SIZE_LINE_NUMBER, pc_linenum);
		  p += strlen (p);
		}
	      else
		{
		  sprintf (p, "%-*s ", SIZE_LINE_NUMBER+1, "---");
		  p += SIZE_LINE_NUMBER+2;
		}

	      if (pc_function)
		{
		  sprintf (p, "%s ", pc_function);
		  p += strlen (p);
		}
	      else if (pc_filename)
		{
		  char *q = (char *) strrchr (pc_filename, '/');
		  sprintf (p, "%s ", (q) ? q+1 : pc_filename);
		  p += strlen (p);
		}

	      if (*p == ' ')
		*p = '\0';
	    }
	}

      trace_printf (sd, cpu, "%-*s 0x%.*x %-*.*s ",
		    SIZE_PHASE+1, phase,
		    SIZE_PC, (unsigned) pc,
		    SIZE_LOCATION, SIZE_LOCATION, buf);
      va_start (ap, fmt);
      trace_vprintf (sd, cpu, fmt, ap);
      va_end (ap);
      trace_printf (sd, cpu, "\n");
    }
}

void
trace_printf VPARAMS ((SIM_DESC sd, sim_cpu *cpu, const char *fmt, ...))
{
#if !defined __STDC__ && !defined ALMOST_STDC
  SIM_DESC sd;
  sim_cpu *cpu;
  const char *fmt;
#endif
  va_list ap;

  VA_START (ap, fmt);
#if !defined __STDC__ && !defined ALMOST_STDC
  sd = va_arg (ap, SIM_DESC);
  cpu = va_arg (ap, sim_cpu *);
  fmt = va_arg (ap, const char *);
#endif

  trace_vprintf (sd, cpu, fmt, ap);

  va_end (ap);
}

void
debug_printf VPARAMS ((sim_cpu *cpu, const char *fmt, ...))
{
#if !defined __STDC__ && !defined ALMOST_STDC
  sim_cpu *cpu;
  const char *fmt;
#endif
  va_list ap;

  VA_START (ap, fmt);
#if !defined __STDC__ && !defined ALMOST_STDC
  cpu = va_arg (ap, sim_cpu *);
  fmt = va_arg (ap, const char *);
#endif

  if (CPU_DEBUG_FILE (cpu) == NULL)
    (* STATE_CALLBACK (CPU_STATE (cpu))->evprintf_filtered)
      (STATE_CALLBACK (CPU_STATE (cpu)), fmt, ap);
  else
    vfprintf (CPU_DEBUG_FILE (cpu), fmt, ap);

  va_end (ap);
}