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.\" 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_add_frame_cie.3 2072 2011-10-27 03:26:49Z jkoshy $
.\"
.Dd September 26, 2011
.Os
.Dt DWARF_ADD_FRAME_CIE 3
.Sh NAME
.Nm dwarf_add_frame_cie
.Nd add a call frame common information entry to a DWARF producer instance
.Sh LIBRARY
.Lb libdwarf
.Sh SYNOPSIS
.In libdwarf.h
.Ft "Dwarf_Unsigned"
.Fo dwarf_add_frame_cie
.Fa "Dwarf_P_Debug dbg"
.Fa "char *augmenter"
.Fa "Dwarf_Small caf"
.Fa "Dwarf_Small daf"
.Fa "Dwarf_Small ra"
.Fa "Dwarf_Ptr initinst"
.Fa "Dwarf_Unsigned initlen"
.Fa "Dwarf_Error *err"
.Fc
.Sh DESCRIPTION
Function
.Fn dwarf_add_frame_cie
adds a DWARF call frame common information entry (CIE) to a producer
instance.
.Pp
Argument
.Ar dbg
should reference a DWARF producer instance allocated using
.Xr dwarf_producer_init 3
or
.Xr dwarf_producer_init_b 3 .
.Pp
Argument
.Ar augmenter
should point to a NUL-terminated augmentation string for the common
information entry.
.Pp
Argument
.Ar caf
specifies the code alignment factor.
.Pp
Argument
.Ar daf
specifies the data alignment factor.
.Pp
Argument
.Ar ra
specifies the column number used for the return address register.
.Pp
Argument
.Ar initinst
should point to a byte stream containing the initial instructions
for the common information entry.
.Pp
Argument
.Ar initlen
should hold the length in bytes of the byte stream pointed to by
argument
.Ar initinst .
.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_add_frame_cie
returns the index value of the created common information entry.
In case of an error, function
.Fn dwarf_add_frame_cie
returns
.Dv DW_DLV_NOCOUNT
and sets the argument
.Ar err .
.Sh ERRORS
Function
.Fn dwarf_add_frame_cie
can fail with:
.Bl -tag -width ".Bq Er DW_DLE_ARGUMENT"
.It Bq Er DW_DLE_ARGUMENT
Argument
.Ar dbg
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_fde_inst 3 ,
.Xr dwarf_add_frame_fde 3 ,
.Xr dwarf_add_frame_fde_b 3 ,
.Xr dwarf_fde_cfa_offset 3 ,
.Xr dwarf_new_fde 3 ,
.Xr dwarf_producer_init 3 ,
.Xr dwarf_producer_init_b 3
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