While stuck offline earlier today, I revisited the textrel-1 MIPS
failure. Eric originally tried setting DF_TEXTREL during section
relocation, but it's too late: we add the entry in size_dynamic_sections.
But I couldn't see any other way to get it right, since there's no
hook to predict whether elf-eh-frame.c will eliminate a relocation.
The easiest approach I found was to annul the DT_TEXTREL and DT_FLAGS
changes in finish_dynamic_sections if no text relocations were
actually generated. This is not immensely pretty, but does work.
OK?
For background, the problem arises from the use of absolute addresses
in .eh_frame. In this case, they're being produced by gas CFI
directives. Is there a reason we can't mix and match encodings?
i.e. why not have gas use a PC-relative format? I'm sure there's
a reason, but I can't think of it...