2014-01-15 08:43:20 +00:00
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.\" Copyright (c) 2011 Kai Wang
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" SUCH DAMAGE.
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.\"
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2019-01-10 14:18:11 +00:00
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.\" $Id: dwarf_add_expr_addr.3 3640 2018-10-14 14:09:13Z jkoshy $
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2014-01-15 08:43:20 +00:00
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.\"
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.Dd September 9, 2011
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.Dt DWARF_ADD_EXPR_ADDR 3
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2019-01-10 14:18:11 +00:00
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.Os
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2014-01-15 08:43:20 +00:00
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.Sh NAME
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.Nm dwarf_add_expr_addr ,
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.Nm dwarf_add_expr_addr_b
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.Nd add a DW_OP_addr location expression
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.Sh LIBRARY
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.Lb libdwarf
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.Sh SYNOPSIS
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.In libdwarf.h
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.Ft "Dwarf_Unsigned"
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.Fo dwarf_add_expr_addr
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.Fa "Dwarf_P_Expr expr"
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.Fa "Dwarf_Unsigned address"
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.Fa "Dwarf_Signed sym_index"
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.Fa "Dwarf_Error *err"
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.Fc
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.Ft "Dwarf_Unsigned"
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.Fo dwarf_add_expr_addr_b
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.Fa "Dwarf_P_Expr expr"
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.Fa "Dwarf_Unsigned address"
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.Fa "Dwarf_Unsigned sym_index"
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.Fa "Dwarf_Error *err"
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.Fc
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.Sh DESCRIPTION
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Function
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.Fn dwarf_add_expr_addr_b
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adds a
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.Dv DW_OP_addr
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location expression to the location expression descriptor referenced
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by argument
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.Ar expr .
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.Pp
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Argument
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.Ar expr
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should reference a location expression descriptor allocated using
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the function
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.Xr dwarf_new_expr 3 .
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.Pp
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Argument
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.Ar address
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specifies the operand, a relocatable address value.
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.Pp
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Argument
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.Ar sym_index
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specifies the ELF symbol index of the symbol to be used for
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relocation.
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.Pp
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If argument
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.Ar err
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is not NULL, it will be used to store error information in case
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of an error.
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.Pp
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Function
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.Fn dwarf_add_expr_addr
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is deprecated.
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It is similar to function
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.Fn dwarf_add_expr_addr_b
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except that it cannot handle all possible symbol index values.
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.Sh RETURN VALUES
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On success, these functions return the size in bytes of the location
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expression byte stream generated.
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In case of an error, these functions return
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.Dv DW_DLV_NOCOUNT
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and set the argument
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.Ar err .
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.Sh ERRORS
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These functions can fail with:
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.Bl -tag -width ".Bq Er DW_DLE_ARGUMENT"
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.It Bq Er DW_DLE_ARGUMENT
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Argument
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.Ar expr
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was NULL.
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.It Bq Er DW_DLE_MEMORY
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An out of memory condition was encountered during the execution of
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the function.
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.El
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.Sh SEE ALSO
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.Xr dwarf 3 ,
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.Xr dwarf_add_AT_location_expr 3 ,
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.Xr dwarf_add_expr_gen 3 ,
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.Xr dwarf_expr_current_offset 3 ,
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.Xr dwarf_expr_into_block 3 ,
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.Xr dwarf_new_expr 3
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