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Using the fromelf Image Converter
Conventions and feedback 
Overview of the fromelf image converter Using fromelf 
fromelf command reference --base [[object_file::]load_region_ID=]num --bin --bincombined --bincombined_base=address --bincombined_padding=size,num --cad --cadcombined --compare=option[,option,...] --continue_on_error --cpu=list --cpu=name --datasymbols --decode_build_attributes --diag_error=tag[,tag,...] --diag_remark=tag[,tag,...] --diag_style={arm|ide|gnu} --diag_suppress=tag[,tag,...] --diag_warning=tag[,tag,...] --dump_build_attributes --emit=option[,option,...] --expandarrays --extract_build_attributes --fieldoffsets --fpu=list --fpu=name --help --i32 --i32combined --ignore_section=option[,option,...] --ignore_symbol=option[,option,...] --info=topic[,topic,...] input_file --interleave=option --m32 --m32combined --only=section_name --output=destination --qualify --relax_section=option[,option,...] --relax_symbol=option[,option,...] --select=select_options --show_cmdline --source_directory=path --text --version_number --vhx --via=file --vsn -w --widthxbanks--fieldoffsets
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| Home > fromelf command reference > --fieldoffsets | |||
This option prints a list of assembly language EQU directives that equate C++ class or C structure field names to their offsets from the base of the class or structure. The input ELF file can be a relocatable object or an image.
Use --output to redirect the output to a file. Use the INCLUDE command from armasm to load the produced file and provide access to C++ classes and C structure members by name from assembly language.
This option outputs all structure information. To output a subset of the structures, use --select .select_options
If you do not require a file that can be input to armasm, use the --text -a options to format the display addresses in a more readable form. The -a option only outputs address information for structures and static data in images because the addresses are not known in a relocatable object.
RestrictionsThis option:
is not available if the source file does not have debug information
can be used only in text mode.
The following examples show how to use --fieldoffsets:
To produce an output listing to
stdoutthat contains all the field offsets from all structures in the fileinputfile.o, enter:fromelf --fieldoffsets inputfile.oTo produce an output file listing to
outputfile.athat contains all the field offsets from structures in the fileinputfile.othat have a name starting withp, enter:fromelf --fieldoffsets --select=p* --output=outputfile.a inputfile.oTo produce an output listing to
outputfile.athat contains all the field offsets from structures in the fileinputfile.owith names oftoolsormoretools, enter:fromelf --fieldoffsets --select=tools.*,moretools.* --output=outputfile.a inputfile.oTo produce an output file listing to
outputfile.athat contains all the field offsets of structure fields whose name starts withnumberand are within structure fieldtopin structuretoolsin the fileinputfile.o, enter:fromelf --fieldoffsets --select=tools.top.number* --output=outputfile.a inputfile.o
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| Copyright © 2008, 2011 ARM. All rights reserved. | ARM DUI 0459B |
| Non-Confidential | ID061811 |
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