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/*

    		 Crown Copyright (c) 1997

    This TenDRA(r) Computer Program is subject to Copyright

    owned by the United Kingdom Secretary of State for Defence

    acting through the Defence Evaluation and Research Agency

    (DERA).  It is made available to Recipients with a

    royalty-free licence for its use, reproduction, transfer

    to other parties and amendment for any purpose not excluding

    product development provided that any such use et cetera

    shall be deemed to be acceptance of the following conditions:-

        (1) Its Recipients shall ensure that this Notice is

        reproduced upon any copies or amended versions of it;

        (2) Any amended version of it shall be clearly marked to

        show both the nature of and the organisation responsible

        for the relevant amendment or amendments;

        (3) Its onward transfer from a recipient to another

        party shall be deemed to be that party's acceptance of

        these conditions;

        (4) DERA gives no warranty or assurance as to its

        quality or suitability for any purpose and DERA accepts

        no liability whatsoever in relation to any use to which

        it may be put.

*/

/**********************************************************************

$Author: pwe $

$Date: 1998/01/21 10:30:07 $

$Revision: 1.2 $

$Log: dw2_lines.c,v $

 * Revision 1.2  1998/01/21  10:30:07  pwe

 * labdiff change

 *

 * Revision 1.1.1.1  1998/01/17  15:55:48  release

 * First version to be checked into rolling release.

 *

 * Revision 1.8  1997/12/08  16:37:07  pwe

 * abbrev key & directory names

 *

 * Revision 1.7  1997/12/04  19:41:40  pwe

 * ANDF-DE V1.9

 *

 * Revision 1.6  1997/11/06  09:22:21  pwe

 * ANDF-DE V1.8

 *

 * Revision 1.5  1997/10/28  10:14:30  pwe

 * local location corrections

 *

 * Revision 1.4  1997/10/23  09:27:48  pwe

 * ANDF-DE v1.7, extra diags

 *

 * Revision 1.3  1997/08/23  13:36:51  pwe

 * initial ANDF-DE

 *

 * Revision 1.2  1997/04/17  11:50:32  pwe

 * Sparc and 80x86 support

 *

 * Revision 1.1  1997/03/20  16:09:24  pwe

 * first version

 *

**********************************************************************/

#include "config.h"

#include <time.h>

#include "common_types.h"

#include "dg_globs.h"

#include "dw2_config.h"

#include "dw2_lines.h"

#include "szs_als.h"

#include "dw2_codes.h"

#include "dw2_basic.h"

#include "dw2_iface.h"

/* values used in statement program prologue */

#define n_statprog_ops 9

static short statprog_op_args [n_statprog_ops] = {

	0, 1, 1, 1, 1, 0, 0, 0, 1

};

#define default_is_stmt 0

#define opcode_base (n_statprog_ops + 1)

/* VARIABLES */

static long current_ad_label = -1;

static long current_ad_count = -1;

static long current_file = 1;

static long current_line = 1;

static long current_col = 0;

static long current_is_stmt = 0;

static long prev_ad_label = -1;

static long prev_ad_count = -1;

static long prev_file = 1;

static long prev_line = 1;

static long prev_col = 0;

static long prev_is_stmt = default_is_stmt;

static char * sep = ", ";

void do_statprog_prologue

    PROTO_N ( (l_start, l_end) )

    PROTO_T ( long l_start X long l_end )

{

  dg_filename f_list = all_files;

  dg_filename f_trace;

  int i;

  long prologue_end = next_dwarf_label();

  enter_section ("debug_line");

  outnl_comment ("Statement Program Prologue");

  out_dwf_label (l_start, 1);

  out32 (); out_dwf_dist_to_label (l_end); d_outnl ();

  out16 (); outn ((long)DWARF_MOD_VERSION); d_outnl ();

  out32 (); out_dwf_dist_to_label (prologue_end); d_outnl ();

  out8 (); outn ((long)min_instr_size); d_outnl ();

  out8 (); outn ((long)default_is_stmt); d_outnl ();

  out8 (); outn ((long)dw_line_base); d_outnl ();

  out8 (); outn ((long)dw_line_range); d_outnl ();

  out8 (); outn ((long)opcode_base); d_outnl ();

  out8 ();

  for (i=1 ;; i++) {

    outn ((long)statprog_op_args[i-1]);

    if (i == n_statprog_ops)

      break;

    outs (sep);

  }

  d_outnl ();

  f_list = all_files;

  i = 0;

  while (f_list) {	/* output directories */

    f_trace = all_files;

    while (f_trace != f_list) {

      if (!strcmp (f_list->file_path, f_trace->file_path) &&

	  !strcmp (f_list->file_host, f_trace->file_host))

	break;

      f_trace = f_trace->another;

    }

    if (f_trace == f_list) {

      if (f_list->file_path[0] || f_list->file_host[0]) {

	dw_out_path (f_list, 0);

	f_list->index = ++i;

      }

      else

	f_list->index = 0;

    }

    else

      f_list->index = f_trace->index;

    f_list = f_list->another;

  }

  out_string ("");	/* end of directories */

  f_list = all_files;

  i = 0;

  while (f_list) {	/* output file names */

    if (f_list->file_name[0]) {

      time_t t = (time_t) f_list->file_dat;

      out_string (f_list->file_name);

      out8 (); uleb128 ((unsigned long)f_list->index);	/* directory */

      d_outnl ();

      out8 (); uleb128 ((unsigned long)(f_list->file_dat));

      outnl_comment (ctime (&t));

      out8 (); uleb128 ((unsigned long)0);	/* unknown length */

      d_outnl ();

      f_list->index = ++i;

    }

    else

      f_list->index = 0;

    f_list = f_list->another;

  }

  out_string ("");	/* end of file names */

  out_dwf_label (prologue_end, 1);

  exit_section ();

  dw2_cie ();

  return;

}

static void ext_opcode

    PROTO_N ( (op, arg_length, align_lab) )

    PROTO_T ( int op X long arg_length X long align_lab )

{

  out8 (); outn ((long)0); outs (sep);

#ifdef NEEDS_DEBUG_ALIGN

  if (align_lab) {

    out_dwf_label (align_lab, 0);

    outs (" - . - 1");		/* OK for arg_length < 127 */

  }

  else

#endif

    uleb128 ((unsigned long)arg_length + 1);

  outs (sep); outn ((long)op); d_outnl ();

  UNUSED (align_lab);

}

static void update_statprog

    PROTO_Z ()

{

  long lineinc = current_line - prev_line;

  long ad_inc = 0;

  long special;

  if (current_ad_label < 0)

    return;

  enter_section ("debug_line");

  if (prev_ad_label < 0) {

    long align_lab = 0;

#ifdef NEEDS_DEBUG_ALIGN

    align_lab = next_dwarf_label();

#endif

    ext_opcode (DW_LNE_set_address, (long)PTR_SZ/8, align_lab);

    out32 (); out_dwf_label (current_ad_label, 0);

    if (current_ad_count) {

      outs (" + "); outn (current_ad_count * min_instr_size);

    }

    d_outnl ();

#ifdef NEEDS_DEBUG_ALIGN

    out_dwf_label (align_lab, 1);

#endif

  }

  else

  if (prev_ad_label != current_ad_label) {

    out8 (); outn ((long)DW_LNS_fixed_advance_pc); d_outnl ();

    out16 (); out_dwf_label (current_ad_label, 0); outs (" - ");

	out_dwf_label (prev_ad_label, 0);

    if (current_ad_count != prev_ad_count) {

      outs (" + "); outn ((current_ad_count - prev_ad_count) * min_instr_size);

    }

    d_outnl ();

  }

  else

    ad_inc = current_ad_count - prev_ad_count;

  prev_ad_label = current_ad_label;

  prev_ad_count = current_ad_count;

  if (current_file != prev_file) {

    out8 (); outn ((long)DW_LNS_set_file);  outs (sep);

      uleb128 ((unsigned long)current_file); d_outnl ();

    prev_file = current_file;

  }

  if (current_is_stmt != prev_is_stmt) {

    out8 (); outn ((long)DW_LNS_negate_stmt); d_outnl ();

    prev_is_stmt = current_is_stmt;

  }

  if (current_col != prev_col) {

    out8 (); outn ((long)DW_LNS_set_column);  outs (sep);

      uleb128 ((unsigned long)current_col); d_outnl ();

    prev_col = current_col;

  }

  if (lineinc < dw_line_base || lineinc >= (dw_line_base + dw_line_range)) {

    out8 (); outn ((long)DW_LNS_advance_line);  outs (sep);

      sleb128 (lineinc); d_outnl ();

    lineinc = 0;

  }

  special = (lineinc - dw_line_base) + (dw_line_range * ad_inc) + opcode_base;

  if (special > 255) {

    out8 (); outn ((long)DW_LNS_advance_pc); outs (sep);

      uleb128 ((unsigned long)ad_inc); d_outnl ();

    special = (lineinc - dw_line_base) + opcode_base;

  }

  out8 ();

  if (special == (opcode_base - dw_line_base))

    outn ((long)DW_LNS_copy);

  else

    outn (special);

  outnl_comment_i ("Line", current_line);

  prev_line = current_line;

  exit_section ();

  return;

}

void dw2_source_mark

    PROTO_N ( (pos, is_stmt) )

    PROTO_T ( short_sourcepos pos X int is_stmt )

{

  /* must be within text segment */

  long newlab = 0;

  if (current_ad_label < 0 || current_ad_label != last_text_label || instr_count < 0)

    newlab = set_dw_text_label ();

  if (newlab || instr_count != current_ad_count || pos.file->index != current_file)

    update_statprog ();

  if (newlab)

    current_ad_label = newlab;

  current_ad_count = instr_count;

  current_file = pos.file->index;

  current_line = pos.line;

  current_col = (long)pos.column;

  current_is_stmt = (long)is_stmt;

  return;

}

void dw2_start_basic_block

    PROTO_Z ()

{

  /* must be within text segment */

  long newlab = 0;

  if (current_ad_label < 0 || current_ad_label != last_text_label || instr_count < 0)

    newlab = set_dw_text_label ();

  if (newlab || instr_count)

    update_statprog ();

  if (newlab)

    current_ad_label = newlab;

  current_ad_count = instr_count;

  enter_section ("debug_line");

  out8 (); outn ((long)DW_LNS_set_basic_block); d_outnl ();

  exit_section ();

  return;

}

void close_statprog

    PROTO_N ( (l_end) )

    PROTO_T ( long l_end )

{

  if (current_ad_label < 0 || current_ad_label != last_text_label || instr_count < 0)

    current_ad_label = set_dw_text_label ();

  current_ad_count = instr_count;

  update_statprog ();

  enter_section ("debug_line");

  ext_opcode (DW_LNE_end_sequence, (long)0, (long)0);

  out_dwf_label (l_end, 1);

  exit_section ();

  return;

}