95 lines
2.9 KiB
Groff
95 lines
2.9 KiB
Groff
.\" Copyright (c) 2011 Kai Wang
|
|
.\" 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.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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: dwarf_expr_into_block.3 2073 2011-10-27 03:30:47Z jkoshy $
|
|
.\"
|
|
.Dd September 13, 2011
|
|
.Os
|
|
.Dt DWARF_EXPR_INTO_BLOCK 3
|
|
.Sh NAME
|
|
.Nm dwarf_expr_into_block
|
|
.Nd retrieve the byte stream for a location expression
|
|
.Sh LIBRARY
|
|
.Lb libdwarf
|
|
.Sh SYNOPSIS
|
|
.In libdwarf.h
|
|
.Ft "Dwarf_Addr"
|
|
.Fo dwarf_expr_into_block
|
|
.Fa "Dwarf_P_Expr expr"
|
|
.Fa "Dwarf_Unsigned *length"
|
|
.Fa "Dwarf_Error *err"
|
|
.Fc
|
|
.Sh DESCRIPTION
|
|
Function
|
|
.Fn dwarf_expr_into_block
|
|
retrieves the byte stream representation of a location expression.
|
|
.Pp
|
|
Argument
|
|
.Ar expr
|
|
should reference a location expression descriptor allocated using
|
|
.Xr dwarf_new_expr 3 .
|
|
.Pp
|
|
Argument
|
|
.Ar length
|
|
should point to a location which will hold the size in bytes of
|
|
the retrieved byte stream.
|
|
.Pp
|
|
If argument
|
|
.Ar err
|
|
is not NULL, it will be used to store error information in case
|
|
of an error.
|
|
.Sh RETURN VALUES
|
|
On success, function
|
|
.Fn dwarf_expr_into_block
|
|
returns the address of the first byte of the generated byte stream.
|
|
In case of an error, function
|
|
.Fn dwarf_expr_into_block
|
|
returns
|
|
.Dv DW_DLV_BADADDR
|
|
and sets the argument
|
|
.Ar err .
|
|
.Sh ERRORS
|
|
Function
|
|
.Fn dwarf_expr_into_block
|
|
can fail with:
|
|
.Bl -tag -width ".Bq Er DW_DLE_ARGUMENT"
|
|
.It Bq Er DW_DLE_ARGUMENT
|
|
One of the arguments
|
|
.Ar expr
|
|
or
|
|
.Ar length
|
|
was NULL.
|
|
.It Bq Er DW_DLE_MEMORY
|
|
An out of memory condition was encountered during the execution of
|
|
the function.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr dwarf 3 ,
|
|
.Xr dwarf_add_AT_location_expr 3 ,
|
|
.Xr dwarf_add_expr_addr 3 ,
|
|
.Xr dwarf_add_expr_addr_b 3 ,
|
|
.Xr dwarf_add_expr_gen 3 ,
|
|
.Xr dwarf_expr_current_offset 3 ,
|
|
.Xr dwarf_new_expr 3
|