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/*

 * Copyright (c) 2002-2005 The TenDRA Project <http://www.tendra.org/>.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *

 * 1. Redistributions of source code must retain the above copyright notice,

 *    this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 *    this list of conditions and the following disclaimer in the documentation

 *    and/or other materials provided with the distribution.

 * 3. Neither the name of The TenDRA Project nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific, prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS

 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;

 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 * $Id$

 */

/*

    		 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(long l_start, 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;

	}

	/* end of directories */

	out_string ("");

	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;

	}

	/* end of file names */

	out_string ("");

	out_dwf_label(prologue_end, 1);

	exit_section();

	dw2_cie();

	return;

}

static void

ext_opcode(int op, long arg_length, 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(void)

{

	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(short_sourcepos pos, 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(void)

{

	/* 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(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;

}