pro_forms.c   [plain text]

/*

  Copyright (C) 2000,2004 Silicon Graphics, 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., 59 Temple Place - Suite 330, Boston MA 02111-1307, 
  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>
#include <limits.h>
#include "pro_incl.h"
#include "pro_expr.h"

#ifndef R_MIPS_NONE
#define R_MIPS_NONE 0
#endif


    /* Indicates no relocation needed. */
#define NO_ELF_SYM_INDEX	0


/* adds an attribute to a die */
extern void _dwarf_pro_add_at_to_die(Dwarf_P_Die die,
				     Dwarf_P_Attribute attr);

/*
    This function adds an attribute whose value is
    a target address to the given die.  The attribute
    is given the name provided by attr.  The address
    is given in pc_value.
*/
/* old interface */
Dwarf_P_Attribute
dwarf_add_AT_targ_address(Dwarf_P_Debug dbg,
			  Dwarf_P_Die ownerdie,
			  Dwarf_Half attr,
			  Dwarf_Unsigned pc_value,
			  Dwarf_Signed sym_index, Dwarf_Error * error)
{
    return
	dwarf_add_AT_targ_address_b(dbg,
				    ownerdie,
				    attr,
				    pc_value,
				    (Dwarf_Unsigned) sym_index, error);
}

/* new interface */
Dwarf_P_Attribute
dwarf_add_AT_targ_address_b(Dwarf_P_Debug dbg,
			    Dwarf_P_Die ownerdie,
			    Dwarf_Half attr,
			    Dwarf_Unsigned pc_value,
			    Dwarf_Unsigned sym_index,
			    Dwarf_Error * error)
{
    Dwarf_P_Attribute new_attr;
    int upointer_size = dbg->de_pointer_size;

    if (dbg == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_DBG_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    if (ownerdie == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_DIE_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    if (attr != DW_AT_low_pc && attr != DW_AT_high_pc &&
	attr != DW_AT_MIPS_loop_begin &&
	attr != DW_AT_MIPS_tail_loop_begin &&
	attr != DW_AT_MIPS_epilog_begin) {
	_dwarf_p_error(dbg, error, DW_DLE_INPUT_ATTR_BAD);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    new_attr = (Dwarf_P_Attribute)
	_dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_Attribute_s));
    if (new_attr == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    new_attr->ar_attribute = attr;
    new_attr->ar_attribute_form = DW_FORM_addr;
    new_attr->ar_nbytes = upointer_size;
    new_attr->ar_rel_symidx = sym_index;
    new_attr->ar_reloc_len = upointer_size;
    new_attr->ar_next = 0;
    if (sym_index != NO_ELF_SYM_INDEX)
	new_attr->ar_rel_type = dbg->de_ptr_reloc;
    else
	new_attr->ar_rel_type = R_MIPS_NONE;

    new_attr->ar_data = (char *)
	_dwarf_p_get_alloc(dbg, upointer_size);
    if (new_attr->ar_data == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }
    WRITE_UNALIGNED(dbg, new_attr->ar_data,
		    (const void *) &pc_value,
		    sizeof(pc_value), upointer_size);

    /* add attribute to the die */
    _dwarf_pro_add_at_to_die(ownerdie, new_attr);
    return new_attr;
}


/*
    This function adds attributes whose value
    is an unsigned constant.  It determines the 
    size of the value field from the value of 
    the constant.
*/
Dwarf_P_Attribute
dwarf_add_AT_unsigned_const(Dwarf_P_Debug dbg,
			    Dwarf_P_Die ownerdie,
			    Dwarf_Half attr,
			    Dwarf_Unsigned value, Dwarf_Error * error)
{
    Dwarf_P_Attribute new_attr;
    Dwarf_Half attr_form;
    Dwarf_Small size;

    if (dbg == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_DBG_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    if (ownerdie == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_DIE_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    switch (attr) {
    case DW_AT_ordering:
    case DW_AT_byte_size:
    case DW_AT_bit_offset:
    case DW_AT_bit_size:
    case DW_AT_inline:
    case DW_AT_language:
    case DW_AT_visibility:
    case DW_AT_virtuality:
    case DW_AT_accessibility:
    case DW_AT_address_class:
    case DW_AT_calling_convention:
    case DW_AT_encoding:
    case DW_AT_identifier_case:
    case DW_AT_MIPS_loop_unroll_factor:
    case DW_AT_MIPS_software_pipeline_depth:
	break;

    case DW_AT_decl_column:
    case DW_AT_decl_file:
    case DW_AT_decl_line:
    case DW_AT_const_value:
    case DW_AT_start_scope:
    case DW_AT_stride_size:
    case DW_AT_count:
	break;

    default:{
	    _dwarf_p_error(dbg, error, DW_DLE_INPUT_ATTR_BAD);
	    return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
	}
    }

    /* 
       Compute the number of bytes needed to hold constant. */
    if (value <= UCHAR_MAX) {
	attr_form = DW_FORM_data1;
	size = 1;
    } else if (value <= USHRT_MAX) {
	attr_form = DW_FORM_data2;
	size = 2;
    } else if (value <= UINT_MAX) {
	attr_form = DW_FORM_data4;
	size = 4;
    } else {
	attr_form = DW_FORM_data8;
	size = 8;
    }

    new_attr = (Dwarf_P_Attribute)
	_dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_Attribute_s));
    if (new_attr == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    new_attr->ar_attribute = attr;
    new_attr->ar_attribute_form = attr_form;
    new_attr->ar_rel_type = R_MIPS_NONE;
    new_attr->ar_reloc_len = 0;	/* irrelevant: unused with R_MIPS_NONE */
    new_attr->ar_nbytes = size;
    new_attr->ar_next = 0;

    new_attr->ar_data = (char *)
	_dwarf_p_get_alloc(dbg, size);
    if (new_attr->ar_data == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }
    WRITE_UNALIGNED(dbg, new_attr->ar_data,
		    (const void *) &value, sizeof(value), size);

    /* add attribute to the die */
    _dwarf_pro_add_at_to_die(ownerdie, new_attr);
    return new_attr;
}


/*
    This function adds attributes whose value
    is an signed constant.  It determines the 
    size of the value field from the value of 
    the constant.
*/
Dwarf_P_Attribute
dwarf_add_AT_signed_const(Dwarf_P_Debug dbg,
			  Dwarf_P_Die ownerdie,
			  Dwarf_Half attr,
			  Dwarf_Signed value, Dwarf_Error * error)
{
    Dwarf_P_Attribute new_attr;
    Dwarf_Half attr_form;
    Dwarf_Small size;

    if (dbg == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_DBG_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    if (ownerdie == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_DIE_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    switch (attr) {
    case DW_AT_upper_bound:
    case DW_AT_lower_bound:
	break;

    default:{
	    _dwarf_p_error(dbg, error, DW_DLE_INPUT_ATTR_BAD);
	    return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
	}
    }

    /* 
       Compute the number of bytes needed to hold constant. */
    if (value >= SCHAR_MIN && value <= SCHAR_MAX) {
	attr_form = DW_FORM_data1;
	size = 1;
    } else if (value >= SHRT_MIN && value <= SHRT_MAX) {
	attr_form = DW_FORM_data2;
	size = 2;
    } else if (value >= INT_MIN && value <= INT_MAX) {
	attr_form = DW_FORM_data4;
	size = 4;
    } else {
	attr_form = DW_FORM_data8;
	size = 8;
    }

    new_attr = (Dwarf_P_Attribute)
	_dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_Attribute_s));
    if (new_attr == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    new_attr->ar_attribute = attr;
    new_attr->ar_attribute_form = attr_form;
    new_attr->ar_rel_type = R_MIPS_NONE;
    new_attr->ar_reloc_len = 0;	/* irrelevant: unused with R_MIPS_NONE */
    new_attr->ar_nbytes = size;
    new_attr->ar_next = 0;

    new_attr->ar_data = (char *)
	_dwarf_p_get_alloc(dbg, size);
    if (new_attr->ar_data == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }
    WRITE_UNALIGNED(dbg, new_attr->ar_data,
		    (const void *) &value, sizeof(value), size);

    /* add attribute to the die */
    _dwarf_pro_add_at_to_die(ownerdie, new_attr);
    return new_attr;
}


/*
    This function adds attributes whose value
    is a location expression.
*/
Dwarf_P_Attribute
dwarf_add_AT_location_expr(Dwarf_P_Debug dbg,
			   Dwarf_P_Die ownerdie,
			   Dwarf_Half attr,
			   Dwarf_P_Expr loc_expr, Dwarf_Error * error)
{
    char encode_buffer[ENCODE_SPACE_NEEDED];
    int res;
    Dwarf_P_Attribute new_attr;
    Dwarf_Half attr_form;
    char *len_str;
    int len_size;
    int block_size;
    char *block_dest_ptr;
    int do_len_as_int = 0;

    if (dbg == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_DBG_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    if (ownerdie == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_DIE_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    if (loc_expr == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_EXPR_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    if (loc_expr->ex_dbg != dbg) {
	_dwarf_p_error(dbg, error, DW_DLE_LOC_EXPR_BAD);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }
    block_size = loc_expr->ex_next_byte_offset;

    switch (attr) {
    case DW_AT_location:
    case DW_AT_string_length:
    case DW_AT_const_value:
    case DW_AT_use_location:
    case DW_AT_return_addr:
    case DW_AT_data_member_location:
    case DW_AT_frame_base:
    case DW_AT_static_link:
    case DW_AT_vtable_elem_location:
	break;

    default:{
	    _dwarf_p_error(dbg, error, DW_DLE_INPUT_ATTR_BAD);
	    return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
	}
    }

    /* 
       Compute the number of bytes needed to hold constant. */
    if (block_size <= UCHAR_MAX) {
	attr_form = DW_FORM_block1;
	len_size = 1;
	do_len_as_int = 1;
    } else if (block_size <= USHRT_MAX) {
	attr_form = DW_FORM_block2;
	len_size = 2;
	do_len_as_int = 1;
    } else if (block_size <= UINT_MAX) {
	attr_form = DW_FORM_block4;
	len_size = 4;
	do_len_as_int = 1;
    } else {
	attr_form = DW_FORM_block;
	res = _dwarf_pro_encode_leb128_nm(block_size, &len_size,
					  encode_buffer,
					  sizeof(encode_buffer));
	if (res != DW_DLV_OK) {
	    _dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
	    return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
	}
	len_str = (char *) encode_buffer;
    }

    new_attr = (Dwarf_P_Attribute)
	_dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_Attribute_s));
    if (new_attr == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    new_attr->ar_attribute = attr;
    new_attr->ar_attribute_form = attr_form;
    new_attr->ar_reloc_len = dbg->de_pointer_size;
    if (loc_expr->ex_reloc_sym_index != NO_ELF_SYM_INDEX) {
	new_attr->ar_rel_type = dbg->de_ptr_reloc;
    } else {
	new_attr->ar_rel_type = R_MIPS_NONE;
    }
    new_attr->ar_rel_symidx = loc_expr->ex_reloc_sym_index;
    new_attr->ar_rel_offset =
	(Dwarf_Word) loc_expr->ex_reloc_offset + len_size;

    new_attr->ar_nbytes = block_size + len_size;

    new_attr->ar_next = 0;
    new_attr->ar_data = block_dest_ptr =
	(char *) _dwarf_p_get_alloc(dbg, block_size + len_size);
    if (new_attr->ar_data == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    if (do_len_as_int) {
	WRITE_UNALIGNED(dbg, block_dest_ptr, (const void *) &block_size,
			sizeof(block_size), len_size);
    } else {
	/* is uleb number form */
	memcpy(block_dest_ptr, len_str, len_size);
    }
    block_dest_ptr += len_size;
    memcpy(block_dest_ptr, &(loc_expr->ex_byte_stream[0]), block_size);

    /* add attribute to the die */
    _dwarf_pro_add_at_to_die(ownerdie, new_attr);
    return new_attr;
}


/*
    This function adds attributes of reference class.
    The references here are local CU references, 
    not DW_FORM_ref_addr.
    The offset field is 4 bytes for 32-bit objects,
    and 8-bytes for 64-bit objects.  Otherdie is the
    that is referenced by ownerdie.

    For reference attributes, the ar_data and ar_nbytes
    are not needed.  Instead, the ar_ref_die points to
    the other die, and its di_offset value is used as
    the reference value.
*/
Dwarf_P_Attribute
dwarf_add_AT_reference(Dwarf_P_Debug dbg,
		       Dwarf_P_Die ownerdie,
		       Dwarf_Half attr,
		       Dwarf_P_Die otherdie, Dwarf_Error * error)
{
    Dwarf_P_Attribute new_attr;

    if (dbg == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_DBG_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    if (ownerdie == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_DIE_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    if (otherdie == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_DIE_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    switch (attr) {
    case DW_AT_specification:
    case DW_AT_discr:
    case DW_AT_common_reference:
    case DW_AT_import:
    case DW_AT_containing_type:
    case DW_AT_default_value:
    case DW_AT_abstract_origin:
    case DW_AT_friend:
    case DW_AT_priority:
    case DW_AT_type:
    case DW_AT_lower_bound:
    case DW_AT_upper_bound:
    case DW_AT_count:
    case DW_AT_sibling:
    case DW_AT_MIPS_stride:
    case DW_AT_MIPS_stride_byte:
    case DW_AT_MIPS_stride_elem:
    case DW_AT_MIPS_clone_origin:
    case DW_AT_MIPS_ptr_dopetype:
    case DW_AT_MIPS_allocatable_dopetype:
    case DW_AT_MIPS_assumed_shape_dopetype:
	break;

    default:{
	    _dwarf_p_error(dbg, error, DW_DLE_INPUT_ATTR_BAD);
	    return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
	}
    }

    new_attr = (Dwarf_P_Attribute)
	_dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_Attribute_s));
    if (new_attr == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    new_attr->ar_attribute = attr;
    new_attr->ar_attribute_form = dbg->de_ar_ref_attr_form;
    new_attr->ar_nbytes = dbg->de_offset_size;
    new_attr->ar_reloc_len = dbg->de_offset_size;
    new_attr->ar_ref_die = otherdie;
    new_attr->ar_rel_type = R_MIPS_NONE;
    new_attr->ar_next = 0;

    /* add attribute to the die */
    _dwarf_pro_add_at_to_die(ownerdie, new_attr);
    return new_attr;
}


/*
    This function adds attributes of the flag class.
*/
Dwarf_P_Attribute
dwarf_add_AT_flag(Dwarf_P_Debug dbg,
		  Dwarf_P_Die ownerdie,
		  Dwarf_Half attr,
		  Dwarf_Small flag, Dwarf_Error * error)
{
    Dwarf_P_Attribute new_attr;

    if (dbg == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_DBG_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    if (ownerdie == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_DIE_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    switch (attr) {
    case DW_AT_is_optional:
    case DW_AT_artificial:
    case DW_AT_declaration:
    case DW_AT_external:
    case DW_AT_prototyped:
    case DW_AT_variable_parameter:
    case DW_AT_MIPS_has_inlines:
    case DW_AT_MIPS_assumed_size:
	break;

    default:{
	    _dwarf_p_error(dbg, error, DW_DLE_INPUT_ATTR_BAD);
	    return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
	}
    }

    new_attr = (Dwarf_P_Attribute)
	_dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_Attribute_s));
    if (new_attr == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    new_attr->ar_attribute = attr;
    new_attr->ar_attribute_form = DW_FORM_flag;
    new_attr->ar_nbytes = 1;
    new_attr->ar_reloc_len = 0;	/* not used */
    new_attr->ar_rel_type = R_MIPS_NONE;
    new_attr->ar_next = 0;

    new_attr->ar_data = (char *)
	_dwarf_p_get_alloc(dbg, 1);
    if (new_attr->ar_data == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }
    memcpy(new_attr->ar_data, &flag, 1);

    /* add attribute to the die */
    _dwarf_pro_add_at_to_die(ownerdie, new_attr);
    return new_attr;
}


/*
    This function adds values of attributes
    belonging to the string class.
*/
Dwarf_P_Attribute
dwarf_add_AT_string(Dwarf_P_Debug dbg,
		    Dwarf_P_Die ownerdie,
		    Dwarf_Half attr, char *string, Dwarf_Error * error)
{
    Dwarf_P_Attribute new_attr;

    if (dbg == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_DBG_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    if (ownerdie == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_DIE_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    new_attr = (Dwarf_P_Attribute)
	_dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_Attribute_s));
    if (new_attr == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    switch (attr) {
    case DW_AT_name:
    case DW_AT_comp_dir:
    case DW_AT_const_value:
    case DW_AT_producer:
    case DW_AT_MIPS_linkage_name:
    case DW_AT_MIPS_abstract_name:
	break;

    default:{
	    _dwarf_p_error(dbg, error, DW_DLE_INPUT_ATTR_BAD);
	    return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
	}
    }

    new_attr->ar_attribute = attr;
    new_attr->ar_attribute_form = DW_FORM_string;
    new_attr->ar_nbytes = strlen(string) + 1;
    new_attr->ar_next = 0;

    new_attr->ar_data =
	(char *) _dwarf_p_get_alloc(NULL, strlen(string) + 1);
    if (new_attr->ar_data == NULL) {
	_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    strcpy(new_attr->ar_data, string);
    new_attr->ar_rel_type = R_MIPS_NONE;
    new_attr->ar_reloc_len = 0;	/* unused for R_MIPS_NONE */

    /* add attribute to the die */
    _dwarf_pro_add_at_to_die(ownerdie, new_attr);
    return new_attr;
}


Dwarf_P_Attribute
dwarf_add_AT_const_value_string(Dwarf_P_Die ownerdie,
				char *string_value, Dwarf_Error * error)
{
    Dwarf_P_Attribute new_attr;

    if (ownerdie == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_DIE_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    new_attr = (Dwarf_P_Attribute)
	_dwarf_p_get_alloc(NULL, sizeof(struct Dwarf_P_Attribute_s));
    if (new_attr == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    new_attr->ar_attribute = DW_AT_const_value;
    new_attr->ar_attribute_form = DW_FORM_string;
    new_attr->ar_nbytes = strlen(string_value) + 1;
    new_attr->ar_next = 0;

    new_attr->ar_data =
	(char *) _dwarf_p_get_alloc(NULL, strlen(string_value) + 1);
    if (new_attr->ar_data == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    strcpy(new_attr->ar_data, string_value);
    new_attr->ar_rel_type = R_MIPS_NONE;
    new_attr->ar_reloc_len = 0;	/* unused for R_MIPS_NONE */

    /* add attribute to the die */
    _dwarf_pro_add_at_to_die(ownerdie, new_attr);
    return new_attr;
}


Dwarf_P_Attribute
dwarf_add_AT_producer(Dwarf_P_Die ownerdie,
		      char *producer_string, Dwarf_Error * error)
{
    Dwarf_P_Attribute new_attr;

    if (ownerdie == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_DIE_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    new_attr = (Dwarf_P_Attribute)
	_dwarf_p_get_alloc(NULL, sizeof(struct Dwarf_P_Attribute_s));
    if (new_attr == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    new_attr->ar_attribute = DW_AT_producer;
    new_attr->ar_attribute_form = DW_FORM_string;
    new_attr->ar_nbytes = strlen(producer_string) + 1;
    new_attr->ar_next = 0;

    new_attr->ar_data =
	(char *) _dwarf_p_get_alloc(NULL, strlen(producer_string) + 1);
    if (new_attr->ar_data == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    strcpy(new_attr->ar_data, producer_string);
    new_attr->ar_rel_type = R_MIPS_NONE;
    new_attr->ar_reloc_len = 0;	/* unused for R_MIPS_NONE */

    /* add attribute to the die */
    _dwarf_pro_add_at_to_die(ownerdie, new_attr);
    return new_attr;
}


Dwarf_P_Attribute
dwarf_add_AT_const_value_signedint(Dwarf_P_Die ownerdie,
				   Dwarf_Signed signed_value,
				   Dwarf_Error * error)
{
    Dwarf_P_Attribute new_attr;
    int leb_size;
    char encode_buffer[ENCODE_SPACE_NEEDED];
    int res;

    if (ownerdie == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_DIE_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    new_attr = (Dwarf_P_Attribute)
	_dwarf_p_get_alloc(NULL, sizeof(struct Dwarf_P_Attribute_s));
    if (new_attr == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    new_attr->ar_attribute = DW_AT_const_value;
    new_attr->ar_attribute_form = DW_FORM_sdata;
    new_attr->ar_rel_type = R_MIPS_NONE;
    new_attr->ar_reloc_len = 0;	/* unused for R_MIPS_NONE */
    new_attr->ar_next = 0;

    res = _dwarf_pro_encode_signed_leb128_nm(signed_value, &leb_size,
					     encode_buffer,
					     sizeof(encode_buffer));
    if (res != DW_DLV_OK) {
	_dwarf_p_error(NULL, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }
    new_attr->ar_data = (char *)
	_dwarf_p_get_alloc(NULL, leb_size);
    if (new_attr->ar_data == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }
    memcpy(new_attr->ar_data, encode_buffer, leb_size);
    new_attr->ar_nbytes = leb_size;

    /* add attribute to the die */
    _dwarf_pro_add_at_to_die(ownerdie, new_attr);
    return new_attr;
}


Dwarf_P_Attribute
dwarf_add_AT_const_value_unsignedint(Dwarf_P_Die ownerdie,
				     Dwarf_Unsigned unsigned_value,
				     Dwarf_Error * error)
{
    Dwarf_P_Attribute new_attr;
    int leb_size;
    char encode_buffer[ENCODE_SPACE_NEEDED];
    int res;

    if (ownerdie == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_DIE_NULL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    new_attr = (Dwarf_P_Attribute)
	_dwarf_p_get_alloc(NULL, sizeof(struct Dwarf_P_Attribute_s));
    if (new_attr == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }

    new_attr->ar_attribute = DW_AT_const_value;
    new_attr->ar_attribute_form = DW_FORM_udata;
    new_attr->ar_rel_type = R_MIPS_NONE;
    new_attr->ar_reloc_len = 0;	/* unused for R_MIPS_NONE */
    new_attr->ar_next = 0;

    res = _dwarf_pro_encode_leb128_nm(unsigned_value, &leb_size,
				      encode_buffer,
				      sizeof(encode_buffer));
    if (res != DW_DLV_OK) {
	_dwarf_p_error(NULL, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }
    new_attr->ar_data = (char *)
	_dwarf_p_get_alloc(NULL, leb_size);
    if (new_attr->ar_data == NULL) {
	_dwarf_p_error(NULL, error, DW_DLE_ALLOC_FAIL);
	return ((Dwarf_P_Attribute) DW_DLV_BADADDR);
    }
    memcpy(new_attr->ar_data, encode_buffer, leb_size);
    new_attr->ar_nbytes = leb_size;

    /* add attribute to the die */
    _dwarf_pro_add_at_to_die(ownerdie, new_attr);
    return new_attr;
}