https://sourceware.org/bugzilla/show_bug.cgi?id=18087
--- Comment #4 from Jon TURNEY <jon.turney at dronecode dot org.uk> ---
(In reply to Jon TURNEY from comment #2)
> So not compressing if the section gets larger sounds like a better approach.
> I'll have a go at implementing that.
This turns out to be not quite so simple due to the bfd interface for dealing
with compressed sections, but an attempt is attached.
With this patch, objcopy --compress-debug-sections on the same test binary
produces:
Name VirtSize VMA RawSize Offset Flags
.text 0017df74 00001000 0017e000 00000600 60500060
.data 00004184 0017f000 00004200 0017e600 c0700040
.rdata 000321e0 00184000 00032200 00182800 40700040
.buildid 00000035 001b7000 00000200 001b4a00 40300040
/4 .eh_frame 00049240 001b8000 00049400 001b4c00 40300040
.bss 0000eae0 00202000 00000000 00000000 c0700080
.edata 0002a0a5 00211000 0002a200 001fe000 40300040
.idata 00004c70 0023c000 00004e00 00228200 c0300040
.rsrc 00007800 00241000 00007400 0022d000 c0300040
.reloc 0000d1bc 00249000 0000d200 00234400 42300040
/14 .zdebug_aranges 00002fb0 00257000 00001200 00241600 42400040
/30 .zdebug_info 007c423e 0025a000 00356200 00242800 42100040
/43 .zdebug_abbrev 00056487 00a1f000 0000d600 00598a00 42100040
/58 .zdebug_line 0009576a 00a76000 00040600 005a6000 42100040
/71 .debug_frame 00000038 00b0c000 00000200 005e6600 42300040
/84 .zdebug_str 00026a8b 00b0d000 00005c00 005e6800 42100040
/96 .zdebug_loc 001799f0 00b34000 0007de00 005ec400 42100040
/108 .zdebug_ranges 00038b88 00cae000 00013000 0066a200 42100040
Note that the .debug_frame section didn't get compressed.
The unstripped output of objcopy can also successfully be executed.
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