100 lines
2.9 KiB
Groff
100 lines
2.9 KiB
Groff
.\" 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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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $Id: dwarf_fde_cfa_offset.3 2073 2011-10-27 03:30:47Z jkoshy $
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.\"
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.Dd September 26, 2011
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.Os
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.Dt DWARF_FDE_CFA_OFFSET 3
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.Sh NAME
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.Nm dwarf_fde_cfa_offset
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.Nd add a DW_CFA_offset frame instruction to a DWARF frame descriptor
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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_P_Fde"
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.Fo dwarf_fde_cfa_offset
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.Fa "Dwarf_P_Fde fde"
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.Fa "Dwarf_Unsigned reg"
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.Fa "Dwarf_Signed offset"
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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_fde_cfa_offset
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appends a
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.Dv DW_CFA_offset
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frame instruction to the frame descriptor referenced by argument
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.Ar fde .
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.Pp
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Argument
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.Ar fde
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should reference a frame descriptor allocated using
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.Xr dwarf_new_fde 3 .
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.Pp
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Argument
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.Ar reg
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specifies the register operand for the frame instruction.
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.Pp
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Argument
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.Ar offset
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specifies the offset operand for the frame instruction.
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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 of an
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error.
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.Sh RETURN VALUES
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On success, function
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.Fn dwarf_fde_cfa_offset
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returns the frame descriptor given in argument
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.Ar fde .
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In case of an error, function
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.Fn dwarf_fde_cfa_offset
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returns
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.Dv DW_DLV_BADADDR
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and sets the argument
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.Ar err .
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.Sh ERRORS
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Function
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.Fn dwarf_fde_cfa_offset
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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 fde
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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 the
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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_fde_inst 3 ,
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.Xr dwarf_add_frame_fde 3 ,
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.Xr dwarf_add_frame_fde_b 3 ,
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.Xr dwarf_add_frame_cie 3 ,
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.Xr dwarf_new_fde 3
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