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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.\" 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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2019-01-10 14:18:11 +00:00
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.\" $Id: dwarf_get_fde_range.3 3644 2018-10-15 19:55:01Z jkoshy $
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2014-01-15 08:43:20 +00:00
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.\"
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.Dd May 22, 2011
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.Dt DWARF_GET_FDE_RANGE 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_get_fde_range
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.Nd retrieve range information from an FDE 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 int
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.Fo dwarf_get_fde_range
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.Fa "Dwarf_Fde fde"
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.Fa "Dwarf_Addr *low_pc"
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.Fa "Dwarf_Unsigned *func_len"
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.Fa "Dwarf_Ptr *fde_bytes"
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.Fa "Dwarf_Unsigned *fde_byte_len"
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.Fa "Dwarf_Off *cie_offset"
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.Fa "Dwarf_Signed *cie_index"
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.Fa "Dwarf_Off *fde_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_get_fde_range
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retrieves range and offset information 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 low_pc
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should point to a location that will be set to the lowest
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program counter address covered by the FDE descriptor.
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.Pp
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Argument
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.Ar func_len
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should point to a location that will hold the length in bytes of
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the address range covered by the FDE descriptor.
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.Pp
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Argument
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.Ar fde_bytes
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should point to a location that will be set to a pointer to the
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content of the FDE descriptor itself.
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.Pp
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Argument
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.Ar fde_byte_len
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should point to a location that will hold the length in bytes of
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the FDE descriptor itself.
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.Pp
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Argument
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.Ar cie_offset
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should point to a location that will be set to the offset, relative to
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the DWARF
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.Dq ".debug_frame"
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section, of the CIE descriptor associated with the given FDE
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descriptor.
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.Pp
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Argument
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.Ar cie_index
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should point to a location that will hold the index of the CIE
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descriptor associated with the FDE descriptor.
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The returned value is a zero-based index into the array of CIE
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descriptors returned by a prior call to functions
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.Xr dwarf_get_fde_list 3
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or
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.Xr dwarf_get_fde_list_eh 3 .
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.Pp
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Argument
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.Ar fde_offset
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should point to a location that will be set to the offset, relative to
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the DWARF
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.Dq ".debug_frame"
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section, of the FDE descriptor.
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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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Function
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.Fn dwarf_get_fde_range
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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_range
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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 low_pc ,
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.Ar func_len ,
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.Ar fde_bytes ,
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.Ar fde_byte_len ,
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.Ar cie_offset ,
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.Ar cie_index
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or
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.Ar fde_offset
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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_get_cie_index 3 ,
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2019-01-10 14:18:11 +00:00
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.Xr dwarf_get_cie_info 3 ,
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.Xr dwarf_get_cie_of_fde 3 ,
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2014-01-15 08:43:20 +00:00
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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_instr_bytes 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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