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$Id: dwarf_get_fde_instr_bytes.3 3644 2018-10-15 19:55:01Z jkoshy $
.Dd May 23, 2011 .Dt DWARF_GET_FDE_INSTR_BYTES 3 .Os .Sh NAME .Nm dwarf_get_fde_instr_bytes .Nd retrieve instructions from FDE descritpor .Sh LIBRARY .Lb libdwarf .Sh SYNOPSIS n libdwarf.h .Ft int .Fo dwarf_get_fde_instr_bytes .Fa "Dwarf_Fde fde" .Fa "Dwarf_Ptr *ret_inst" .Fa "Dwarf_Unsigned *ret_len" .Fa "Dwarf_Error *error" .Fc .Sh DESCRIPTION Function .Fn dwarf_get_fde_instr_bytes retrieves instruction bytes from a given FDE descriptor.
p Argument .Ar fde should reference a valid DWARF FDE descriptor.
p Argument .Ar ret_inst should point to a location that will be set to a pointer to an array of bytes containing the instructions of the FDE descriptor.
p Argument .Ar ret_len should point to a location that will hold the length in bytes of the instructions returned in argument .Ar ret_inst .
p If argument .Ar err is not NULL, it will be used to store error information in case of an error.
p Applications can use the function .Xr dwarf_expand_frame_instructions 3 to parse and expand the returned instruction bytes into an array of .Vt Dwarf_Frame_Op descriptors. .Sh RETURN VALUES Function .Fn dwarf_get_fde_instr_bytes returns .Dv DW_DLV_OK when it succeeds. In case of an error, it returns .Dv DW_DLV_ERROR and sets the argument .Ar err . .Sh ERRORS Function .Fn dwarf_get_fde_instr_bytes can fail with: l -tag -width ".Bq Er DW_DLE_ARGUMENT" t Bq Er DW_DLE_ARGUMENT One of the arguments .Ar fde , .Ar ret_inst or .Ar ret_len was NULL. .El .Sh SEE ALSO .Xr dwarf 3 , .Xr dwarf_expand_frame_instructions 3 , .Xr dwarf_get_cie_index 3 , .Xr dwarf_get_cie_info 3 , .Xr dwarf_get_cie_of_fde 3 , .Xr dwarf_get_fde_at_pc 3 , .Xr dwarf_get_fde_info_for_all_regs 3 , .Xr dwarf_get_fde_info_for_all_regs3 3 , .Xr dwarf_get_fde_info_for_cfa_reg3 3 , .Xr dwarf_get_fde_info_for_reg 3 , .Xr dwarf_get_fde_info_for_reg3 3 , .Xr dwarf_get_fde_list 3 , .Xr dwarf_get_fde_list_eh 3 , .Xr dwarf_get_fde_n 3 , .Xr dwarf_get_fde_range 3