/*

  Copyright (C) 2000,2001,2004 Silicon Graphics, Inc.  All Rights Reserved.

  Portions Copyright 2002 Sun Microsystems, Inc. All rights reserved.

  This program is free software; you can redistribute it and/or modify it

  under the terms of version 2.1 of the GNU Lesser General Public License 

  as published by the Free Software Foundation.

  This program is distributed in the hope that it would be useful, but

  WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  

  Further, this software is distributed without any warranty that it is

  free of the rightful claim of any third person regarding infringement 

  or the like.  Any license provided herein, whether implied or 

  otherwise, applies only to this software file.  Patent licenses, if

  any, provided herein do not apply to combinations of this program with 

  other software, or any other product whatsoever.  

  You should have received a copy of the GNU Lesser General Public 

  License along with this program; if not, write the Free Software 

  Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston MA 02110-1301,

  USA.

  Contact information:  Silicon Graphics, Inc., 1500 Crittenden Lane,

  Mountain View, CA 94043, or:

  http://www.sgi.com

  For further information regarding this notice, see:

  http://oss.sgi.com/projects/GenInfo/NoticeExplan

*/

#include "config.h"

#include "libdwarfdefs.h"

#include <stdio.h>

#include <string.h>

#ifdef HAVE_ELFACCESS_H

#include <elfaccess.h>

#else

/* Set r_info  as defined by ELF generic ABI */

#define Set_REL32_info(r,s,t) ((r).r_info = ELF32_R_INFO(s,t))

#define Set_REL64_info(r,s,t) ((r).r_info = ELF64_R_INFO(s,t))

#endif

#include "pro_incl.h"

#include "pro_section.h"

#include "pro_reloc.h"

#include "pro_reloc_stream.h"

/*

	Return DW_DLV_ERROR on malloc error or reltarget_length error.

	Return DW_DLV_OK otherwise

*/

 /*ARGSUSED*/ int

_dwarf_pro_reloc_name_stream64(Dwarf_P_Debug dbg,

			       int base_sec_index,

			       Dwarf_Unsigned offset,	/* r_offset of reloc */

			       Dwarf_Unsigned symidx,

			       enum Dwarf_Rel_Type type,

			       int reltarget_length)

{

#if HAVE_ELF64_GETEHDR

    REL64 *elf64_reloc;

    void *relrec_to_fill;

    int res;

    int rel_type;

    res = _dwarf_pro_reloc_get_a_slot(dbg, base_sec_index,

				      &relrec_to_fill);

    if (res != DW_DLV_OK)

	return res;

    if (type == dwarf_drt_data_reloc) {

	if (reltarget_length == dbg->de_offset_size) {

	    rel_type = dbg->de_offset_reloc;

	} else if (reltarget_length == dbg->de_pointer_size) {

	    rel_type = dbg->de_ptr_reloc;

	} else {

	    return DW_DLV_ERROR;

	}

    } else if (type == dwarf_drt_segment_rel) {

	rel_type = dbg->de_exc_reloc;

    } else {

	/* We are in trouble: improper use of stream relocations.

	   Someone else will diagnose */

	rel_type = 0;

    }

    elf64_reloc = (REL64 *)relrec_to_fill;

    elf64_reloc->r_offset = offset;

    Set_REL64_info(*elf64_reloc, symidx, rel_type);

    return DW_DLV_OK;

#else /* !HAVE_ELF64_GETEHDR */

    return DW_DLV_ERROR;

#endif /* #if HAVE_ELF64_GETEHDR */

}

/*

	Return DW_DLV_ERROR on malloc error or reltarget_length error.

	Return DW_DLV_OK otherwise

	a binary reloc: 32bit ABI

*/

int

_dwarf_pro_reloc_name_stream32(Dwarf_P_Debug dbg, int base_sec_index, Dwarf_Unsigned offset,	/* r_offset 

												   of 

												   reloc 

												 */

			       Dwarf_Unsigned symidx,

			       enum Dwarf_Rel_Type type,

			       int reltarget_length)

{

    REL32 *elf32_reloc;

    void *relrec_to_fill;

    int res;

    int rel_type;

    res = _dwarf_pro_reloc_get_a_slot(dbg, base_sec_index,

				      &relrec_to_fill);

    if (res != DW_DLV_OK)

	return res;

    if (type == dwarf_drt_data_reloc) {

	if (reltarget_length == dbg->de_offset_size) {

	    rel_type = dbg->de_offset_reloc;

	} else if (reltarget_length == dbg->de_pointer_size) {

	    rel_type = dbg->de_ptr_reloc;

	} else {

	    return DW_DLV_ERROR;

	}

    } else if (type == dwarf_drt_segment_rel) {

	rel_type = dbg->de_exc_reloc;

    } else {

	/* We are in trouble: improper use of stream relocations.

	   Someone else will diagnose */

	rel_type = 0;

    }

    elf32_reloc = (REL32*)relrec_to_fill;

    elf32_reloc->r_offset = (Elf32_Addr) offset;

    Set_REL32_info(*elf32_reloc, (Dwarf_Word) symidx, rel_type);

    return DW_DLV_OK;

    /* get a slot, fill in the slot entry */

}

/*

	Return DW_DLV_OK.

	Never can really do anything: lengths cannot

	be represented as end-start in a stream.

*/

 /*ARGSUSED*/ int

_dwarf_pro_reloc_length_stream(Dwarf_P_Debug dbg, int base_sec_index, Dwarf_Unsigned offset,	/* r_offset 

												   of 

												   reloc 

												 */

			       Dwarf_Unsigned start_symidx,

			       Dwarf_Unsigned end_symidx,

			       enum Dwarf_Rel_Type type,

			       int reltarget_length)

{

    /* get a slot, fill in the slot entry */

    return DW_DLV_OK;

}

/* 

        Ensure each stream is a single buffer and

        add that single buffer to the set of stream buffers.

	By creating a new buffer and copying if necessary.

        Free the input set of buffers if we consolidate.

        Return -1 on error (malloc failure)

        Return DW_DLV_OK on success. Any other return indicates 

	malloc failed.

*/

int

_dwarf_stream_relocs_to_disk(Dwarf_P_Debug dbg,

			     Dwarf_Signed * new_sec_count)

{

    unsigned long total_size = 0;

    Dwarf_Small *data;

    int sec_index;

    unsigned long i;

    Dwarf_Error err;

    Dwarf_Error *error = &err;

    Dwarf_Signed sec_count = 0;

    Dwarf_P_Per_Reloc_Sect p_reloc = &dbg->de_reloc_sect[0];

    for (i = 0; i < NUM_DEBUG_SECTIONS; ++i, ++p_reloc) {

	unsigned long ct = p_reloc->pr_reloc_total_count;

	unsigned len;

	struct Dwarf_P_Relocation_Block_s *p_blk;

	struct Dwarf_P_Relocation_Block_s *p_blk_last;

	Dwarf_P_Per_Reloc_Sect prb;

	if (ct == 0) {

	    continue;

	}

	prb = &dbg->de_reloc_sect[i];

	len = dbg->de_relocation_record_size;

	++sec_count;

	total_size = ct * len;

	sec_index = prb->pr_sect_num_of_reloc_sect;

	if (sec_index == 0) {

	    /* call de_func or de_func_b, getting section number of

	       reloc sec */

	    int rel_section_index;

	    Dwarf_Unsigned name_idx;

	    int int_name;

	    int err;

	    if (dbg->de_func_b) {

		rel_section_index =

		    dbg->de_func_b(_dwarf_rel_section_names[i],

				   /* size */

				   dbg->de_relocation_record_size,

				   /* type */ SHT_REL,

				   /* flags */ 0,

				   /* link to symtab, which we cannot

				      know */ 0,

				   /* info == link to sec rels apply to 

				    */

				   dbg->de_elf_sects[i],

				   &name_idx, &err);

	    } else {

		rel_section_index =

		    dbg->de_func(_dwarf_rel_section_names[i],

				 /* size */

				 dbg->de_relocation_record_size,

				 /* type */ SHT_REL,

				 /* flags */ 0,

				 /* link to symtab, which we cannot

				    know */ 0,

				 /* info == link to sec rels apply to */

				 dbg->de_elf_sects[i], &int_name, &err);

		name_idx = int_name;

	    }

	    if (rel_section_index == -1) {

		{

		    _dwarf_p_error(dbg, error, DW_DLE_ELF_SECT_ERR);

		    return (DW_DLV_ERROR);

		}

	    }

	    prb->pr_sect_num_of_reloc_sect = rel_section_index;

	    sec_index = rel_section_index;

	}

	GET_CHUNK(dbg, sec_index, data, total_size, &err);

	p_blk = p_reloc->pr_first_block;

	/* following loop executes at least once. Effects the

	   consolidation to a single block or, if already a single

	   block, simply copies to the output buffer. And frees the

	   input block. The new block is in the de_debug_sects list. */

	while (p_blk) {

	    unsigned long len =

		p_blk->rb_where_to_add_next - p_blk->rb_data;

	    memcpy(data, p_blk->rb_data, len);

	    data += len;

	    p_blk_last = p_blk;

	    p_blk = p_blk->rb_next;

	    _dwarf_p_dealloc(dbg, (Dwarf_Small *) p_blk_last);

	}

	/* ASSERT: sum of len copied == total_size */

	/* 

	   We have copied the input, now drop the pointers to it. For

	   debugging, leave the other data untouched. */

	p_reloc->pr_first_block = 0;

	p_reloc->pr_last_block = 0;

    }

    *new_sec_count = sec_count;

    return DW_DLV_OK;

}