114 lines
3.3 KiB
Groff
114 lines
3.3 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_get_fde_instr_bytes.3 2071 2011-10-27 03:20:00Z jkoshy $
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.\"
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.Dd May 23, 2011
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.Os
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.Dt DWARF_GET_FDE_INSTR_BYTES 3
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.Sh NAME
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.Nm dwarf_get_fde_instr_bytes
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.Nd retrieve instructions from FDE descritpor
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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 int
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.Fo dwarf_get_fde_instr_bytes
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.Fa "Dwarf_Fde fde"
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.Fa "Dwarf_Ptr *ret_inst"
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.Fa "Dwarf_Unsigned *ret_len"
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.Fa "Dwarf_Error *error"
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.Fc
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.Sh DESCRIPTION
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Function
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.Fn dwarf_get_fde_instr_bytes
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retrieves instruction bytes from a given FDE descriptor.
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.Pp
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Argument
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.Ar fde
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should reference a valid DWARF FDE descriptor.
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.Pp
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Argument
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.Ar ret_inst
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should point to a location that will be set to a pointer
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to an array of bytes containing the instructions of the
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FDE descriptor.
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.Pp
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Argument
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.Ar ret_len
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should point to a location that will hold the length in
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bytes of the instructions returned in argument
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.Ar ret_inst .
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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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.Pp
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Applications can use the function
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.Xr dwarf_expand_frame_instructions 3
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to parse and expand the returned instruction bytes into an array of
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.Vt Dwarf_Frame_Op
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descriptors.
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.Sh RETURN VALUES
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Function
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.Fn dwarf_get_fde_instr_bytes
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returns
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.Dv DW_DLV_OK
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when it succeeds.
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In case of an error, it returns
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.Dv DW_DLV_ERROR
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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_get_fde_instr_bytes
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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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One of the arguments
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.Ar fde ,
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.Ar ret_inst
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or
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.Ar ret_len
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was NULL.
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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_expand_frame_instructions 3 ,
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.Xr dwarf_get_cie_info 3 ,
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.Xr dwarf_get_cie_index 3 ,
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.Xr dwarf_get_cie_of_fde ,
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.Xr dwarf_get_fde_at_pc 3 ,
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.Xr dwarf_get_fde_info_for_all_regs 3 ,
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.Xr dwarf_get_fde_info_for_all_regs3 3 ,
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.Xr dwarf_get_fde_info_for_cfa_reg3 3 ,
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.Xr dwarf_get_fde_info_for_reg 3 ,
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.Xr dwarf_get_fde_info_for_reg3 3 ,
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.Xr dwarf_get_fde_list 3 ,
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.Xr dwarf_get_fde_list_eh 3 ,
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.Xr dwarf_get_fde_n 3 ,
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.Xr dwarf_get_fde_range 3
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