# # Copyright (C) 2012 Marek Vasut # # 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