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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: 1998/03/15 16:00:32 $

$Revision: 1.4 $

$Log: dw2_basic.c,v $

 * Revision 1.4  1998/03/15  16:00:32  pwe

 * regtrack dwarf dagnostics added

 *

 * Revision 1.3  1998/03/11  11:03:37  pwe

 * DWARF optimisation info

 *

 * Revision 1.2  1998/01/21  10:30:04  pwe

 * labdiff change

 *

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

 * First version to be checked into rolling release.

 *

 * Revision 1.11  1997/12/08  16:36:59  pwe

 * abbrev key & directory names

 *

 * Revision 1.10  1997/12/04  19:41:10  pwe

 * ANDF-DE V1.9

 *

 * Revision 1.9  1997/11/06  09:21:57  pwe

 * ANDF-DE V1.8

 *

 * Revision 1.8  1997/10/23  09:27:23  pwe

 * ANDF-DE v1.7, extra diags

 *

 * Revision 1.7  1997/10/10  18:18:19  pwe

 * prep ANDF-DE revision

 *

 * Revision 1.6  1997/08/23  13:36:31  pwe

 * initial ANDF-DE

 *

 * Revision 1.5  1997/05/13  08:02:25  pwe

 * Signed LEB128 corrected

 *

 * Revision 1.4  1997/04/17  11:50:11  pwe

 * Sparc and 80x86 support

 *

 * Revision 1.3  1997/04/01  17:19:33  pwe

 * diagnose pl_tests and locate -> platform specific

 *

 * Revision 1.2  1997/03/24  11:10:17  pwe

 * struct bitfields

 *

 * Revision 1.1  1997/03/20  16:08:59  pwe

 * first version

 *

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

#include "config.h"

#include "common_types.h"

#include "dw2_config.h"

#include "dw2_basic.h"

#include "dw2_codes.h"

#include "dw2_iface.h"

#include "szs_als.h"

#include "expmacs.h"

#include "tags.h"

#include "basicread.h"

#include "dw2_abbrev_vn.h"

#define entry_names_wanted

#include "dw2_entries.h"

#undef entry_names_wanted

static char *sep = ", ";

void

uleb128(unsigned long value)

{

	int byt;

	for (;;) {

		byt = value & 127;

		value >>= 7;

		if (value == 0) {

			outn((long)byt);

			return;

		}

		outn((long)byt | 128);

		outs(sep);

	}

}

int

uleb128_length(unsigned long value)

{

	int op = 1;

	for (;;) {

		value >>= 7;

		if (value == 0) {

			return op;

		}

		op++;

	}

}

void

sleb128(long value)

{

	int negative = (value < 0);

	int byt;

	for (;;) {

		byt = (unsigned long)value & 127;

		value >>= 7;

		if (negative) {

			/* sign extend, since C doesn't imply arithmetic

			 * shift */

			value |= - (1 << ((sizeof(value) * 8) - 7));

		}

		/* sign bit of byte is 2nd high order bit (0x40) */

		if (value == - (long)((byt & 0x40) != 0)) {

			outn((long)byt);

			return;

		}

		outn((long)byt | 128);

		outs(sep);

	}

}

int

sleb128_length(long value)

{

	int op = 1;

	int negative = (value < 0);

	int byt;

	for (;;) {

		byt = (unsigned long)value & 127;

		value >>= 7;

		if (negative) {

			/* sign extend, since C doesn't imply arithmetic

			 * shift */

			value |= - (1 << ((sizeof(value) * 8) - 7));

		}

		if (value == - (long)((byt & 0x40) != 0)) {

			return op;

		}

		op++;

	}

}

void

set_attribute(int nm, int form)

{

	out8();

	uleb128((unsigned long)nm);

	if (form || !nm) {

		outs(sep);

		uleb128((unsigned long) form);

	}

	d_outnl();

	return;

}

static long info_end;

static long pubnames_end;

static long aranges_end;

void

do_compunit_header(void)

{

	info_end = next_dwarf_label();

	pubnames_end = next_dwarf_label();

	aranges_end = next_dwarf_label();

	enter_section("debug_info");

	out_dwf_label(dw_info_start, 1);

	outnl_comment("Compilation Unit Header");

	out32();

	out_dwf_dist_to_label(info_end);

	d_outnl();

	out16();

	outn((long)DWARF_MOD_VERSION);

	d_outnl();

	out32();

	outs(abbrev_name);

	d_outnl();

	out8();

	outn((long)PTR_SZ/8);

	d_outnl();

	exit_section();

	enter_section("debug_pubnames");

	out32();

	out_dwf_dist_to_label(pubnames_end);

	d_outnl();

	out16();

	outn((long)DWARF_MOD_VERSION);

	d_outnl();

	out32();

	out_dwf_label(dw_info_start, 0);

	d_outnl();

	out32();

	out_dwf_labdiff(dw_info_start, info_end);

	d_outnl();

	exit_section();

	enter_section("debug_aranges");

	out32();

	out_dwf_dist_to_label(aranges_end);

	d_outnl();

	out16();

	outn((long)DWARF_MOD_VERSION);

	d_outnl();

	out32();

	out_dwf_label(dw_info_start, 0);

	d_outnl();

	out8();

	outn((long)PTR_SZ/8);

	d_outnl();

	out8();

	outn((long)0);

	d_outnl();

	dot_align(PTR_SZ/4);

	exit_section();

	return;

}

void

close_compunit_info(void)

{

	enter_section("debug_info");

	out_dwf_label(info_end, 1);

#ifdef NEEDS_DEBUG_ALIGN

	dot_align(4);

#endif

	exit_section();

	enter_section("debug_pubnames");

	out32();

	outn((long)0);

	d_outnl();

	out_dwf_label(pubnames_end, 1);

#ifdef NEEDS_DEBUG_ALIGN

	dot_align(4);

#endif

	exit_section();

	enter_section("debug_aranges");

	out32();

	outn((long)0);

	d_outnl();

	out32();

	outn((long)0);

	d_outnl();

	out_dwf_label(aranges_end, 1);

	exit_section();

}

void

dw_sibling_end(void)

{

	out8();

	uleb128((unsigned long)0);

	outnl_comment("sibling end");

	return;

}

void

dw_at_address(long lab)

{

	out32();

	out_dwf_label(lab, 0);

	d_outnl();

	return;

}

void

dw_at_ext_lab(ext_lab lab)

{

	out32();

	switch (lab.k) {

	case LAB_STR:

		outs(lab.u.s);

		break;

	case LAB_CODE:

		out_code_label(lab.u.l);

		break;

	case LAB_D:

		out_dwf_label(lab.u.l, 0);

		break;

	default:

		failer("unset label");

	}

	d_outnl();

	return;

}

void

dw_set_ext_lab(ext_lab lab)

{

	switch (lab.k) {

	case LAB_STR:

		out_ext_label(lab.u.s);

		break;

	case LAB_D:

		out_dwf_label(lab.u.l, 1);

		break;

	default:

		failer("unexpected set label");

	}

	return;

}

void

dw_at_ext_address(dg_tag dt)

{

	if (dt->outref.k == NO_LAB) {

		dt->outref.k = LAB_D;

		dt->outref.u.l = next_dwarf_label();

	}

	dw_at_ext_lab(dt->outref);

	return;

}

void

set_ext_address(dg_tag dt)

{

	if (dt->outref.k == NO_LAB) {

		dt->outref.k = LAB_D;

		dt->outref.u.l = next_dwarf_label();

	}

	dw_set_ext_lab(dt->outref);

	return;

}

void

dw_at_abstract_lab(dg_tag dt)

{

	if (!dt->abstract_lab) {

		dt->abstract_lab = next_dwarf_label();

	}

	out32();

	out_dwf_label(dt->abstract_lab, 0);

	d_outnl();

	return;

}

void

set_abstract_lab(dg_tag dt)

{

	if (!dt->abstract_lab) {

		dt->abstract_lab = next_dwarf_label();

	}

	out_dwf_label(dt->abstract_lab, 1);

	return;

}

void

dw_at_string(char* s)

{

	if (!s) {

		s = "";

	}

	out_string(s);

	return;

}

void

dw_at_form(int f)

{

	out8();

	uleb128((unsigned long)f);

	return;

}

void

dw_at_data(int n, long d)

{

	switch (n) {

	case 1: {

		out8();

		break;

	}

	case 2: {

		out16();

		break;

	}

	case 4: {

		out32();

		break;

	}

	default:

		failer("dwarf data size not supported");

	}

	outn(d);

	d_outnl();

	return;

}

void

dw_at_udata(unsigned long n)

{

	out8();

	uleb128(n);

	d_outnl();

	return;

}

void

dw_at_sdata(long n)

{

	out8();

	sleb128(n);

	d_outnl();

	return;

}

void

dw_at_flag(int x)

{

	out8();

	outn((long)x);

	d_outnl();

	return;

}

void

dw_at_decl(short_sourcepos p)

{

	out8();

	uleb128((unsigned long)(p.file ? p.file->index : 0));

	outs(sep);

	uleb128((unsigned long)p.line);

	outs(sep);

	uleb128((unsigned long)p.column);

	d_outnl();

	return;

}

void

dw_no_locate(void)

{

	out8();

	outn((long)0);

	outnl_comment("discarded variable");

	return;

}

void

dw_locate_offset(int n)

{

	out8();

	outn((long)(1 + uleb128_length((unsigned long)n)));

	outs(sep);

	outn((long)DW_OP_plus_uconst);

	outs(sep);

	uleb128((unsigned long)n);

	d_outnl();

	return;

}

static char *bad_refloc = "unimplemented relative location";

static int

refloc_length(exp e, exp id)

{

	switch (name(e)) {

	case name_tag:

		if (son(e) != id) {

			failer(bad_refloc);

		}

		if (no(e) == 0) {

			return(0);

		}

		return(1 + uleb128_length((unsigned long)no(e) / 8));

	case cont_tag:

		return(refloc_length(son(e), id) + 1);

	case reff_tag:

		if (no(e) <0) {

			failer(bad_refloc);

		}

		return(refloc_length(son(e), id) + 1 +

		       uleb128_length((unsigned long)no(e) / 8));

	default:

		failer(bad_refloc);

		return(0);

	}

}

static void

out_refloc(exp e, exp id)

{

	switch (name(e)) {

	case name_tag:

		if (son(e) != id) {

			failer(bad_refloc);

		}

		outs(sep);

		outn((long)DW_OP_plus_uconst);

		outs(sep);

		uleb128((unsigned long)no(e) /8);

		return;

	case cont_tag:

		out_refloc(son(e), id);

		outs(sep);

		outn((long)DW_OP_deref);

		return;

	case reff_tag:

		if (no(e) <0) {

			failer(bad_refloc);

		}

		out_refloc(son(e), id);

		outs(sep);

		outn((long)DW_OP_plus_uconst);

		outs(sep);

		uleb128((unsigned long)no(e) /8);

		return;

	default:

		failer(bad_refloc);

	}

}

void

dw_locate_reloffset(exp e)

{

	int length;

	if (name(e) != ident_tag) {

		failer(bad_refloc);

		return;

	}

	length = refloc_length(bro(son(e)), e);

	out8();

	if (length == 0) {

		outn((long)1);

		outs(sep);

		outn((long)DW_OP_nop);

	} else {

		outn((long)length);

		out_refloc(bro(son(e)), e);

	}

	d_outnl();

	return;

}

void

dw_at_distance(long lo, long hi)

{

	out16();

	out_dwf_labdiff(lo, hi);

	d_outnl();

	return;

}

long last_text_label = 0;

long

set_dw_text_label(void)

{

	if (any_output) {

		last_text_label = next_dwarf_label();

		out_dwf_label(last_text_label, 1);

		reset_any_output;

	}

	return last_text_label;

}

void

out_text_label(long n)

{

	out_dwf_label(n, 1);

	last_text_label = n;

	return;

}

void

out_loc_range(long start, long end, int inclusive)

{

	/* for location list */

	out32();

	out_dwf_labdiff(dw_text_start, start);

	d_outnl();

	out32();

	out_dwf_labdiff(dw_text_start, end);

	if (inclusive) {

		outs(" + ");

		outn((long)min_instr_size);

	}

	d_outnl();

	return;

}