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- #
- # Copyright (C) 2012 Marek Vasut <marex@denx.de>
- #
- # See file CREDITS for list of people who contributed to this
- # project.
- #
- # This program is free software; you can redistribute it and/or
- # modify it under the terms of the GNU General Public License as
- # published by the Free Software Foundation; either version 2 of
- # the License, or (at your option) any later version.
- #
- #########################################################################
- ##
- # make_u_boot_list - Generate contents of u_boot_list section
- # 1: The name of the resulting file (usually u-boot.lst)
- # 2: Files to analyze for possible u_boot_list entries
- #
- # This function generates the contents of the u_boot_list section,
- # including all the border symbols for it's subsections. The operation
- # of this function is as follows, numbering goes per lines:
- #
- # 1) Dump the ELF header sections from all files supplied via $(2)
- # 2) Filter out all other stuff that does not belong into .u_boot_list
- # section.
- # 3) Fix up the lines so that the resulting output is is in format
- # ".u_boot_list.*".
- # 4) Remove the last .something$, since that only contains the name
- # of the variable to be put into a subsection. This name is irelevant
- # for generation of border symbols, thus of no interest, remove it.
- # 5) Take each line and for every dot "." in that line, print the whole
- # line until that dot "." . This is important so that we have all
- # parent border symbols generated as well.
- # 6) Load every line and firstly append "\a" at the end and print the
- # line. Next, append "@" at the end and print the line. Finally,
- # append "~" at the end of line. This will make sense in conjunction
- # with 6) and 7).
- # 7) Sort the lines. It is imperative to use LC_COLLATE=C here because
- # with this, the "\a" symbol is first and "~" symbol is last. Any
- # other symbols fall inbetween. Symbols like "@", which marks the
- # end of current line (representing current section) and ".", which
- # means the line continues and thus represents subsection.
- # 8) With such ordering, all lines ending with "\a" will float at the
- # begining of all lines with the same prefix. Thus it is easy to
- # replace "\a" with __start and make it the __start border symbol.
- # Very similarly for "~", which will be always at the bottom and so
- # can be replaced by "__end" and made into the __end border symbol.
- # Finally, every line ending with "@" symbol will be transformed
- # into " *(SORT(${line}*)); " format, which in the linker parlance
- # will allow it to trap all symbols relevant to the subsection.
- #
- define make_u_boot_list
- $(1): $(2)
- $(OBJDUMP) -h $(2) | \
- sed -n -e '/.*\.u_boot_list[^ ]\+/ ! {d;n}' \
- -e 's/.*\(\.u_boot_list[^ ]\+\).*$$$$/\1/' \
- -e 's/\.[^\.]\+$$$$//' \
- -e ':s /^.\+$$$$/ { p;s/^\(.*\)\.[^\.]*$$$$/\1/;b s }' | \
- sed -n -e 'h;s/$$$$/\a/p;g;s/$$$$/@/p;g;s/$$$$/~/p;' | \
- LC_COLLATE=C sort -u | \
- sed -n -e '/\a$$$$/ { s/\./_/g;s/\a$$$$/__start = .;/p; }'\
- -e '/~$$$$/ { s/\./_/g;s/~$$$$/__end = .;/p; }'\
- -e '/@$$$$/ { s/\(.*\)@$$$$/*(SORT(\1.*));/p }' > $(1)
- endef
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