cosmopolitan/build
Justine Tunney 94afa982c3 Fix zip executables on MacOS
Here's why we got those `Killed: 11` failures on MacOS after modifying
the contentns of the redbean.com executable. If you were inserting a
small file, such as a HelloWorld.html file, then InfoZIP might have
decreased the size of the executable to less than what the Mach-O
section had been expecting.

That's because when zipobj.com put things like time zone data in the
executable, it aligned each zip file entry on a 64-byte boundary, simply
for the sake of readability in binary dumps. But when InfoZIP edited the
file it would rewrite every entry using ZIP's usual 2-byte alignment.
Thus causing shrinkage.

The solution was to reconfigure the linker script so that zip file bits
that get put into the executable at link-time, such as timezone data,
aren't officially part of the executable image, i.e. we don't want the
operating system to load that part.

The original decision to put the linked zip files into the .data section
was mostly made so that when the executable was run in its .com.dbg form
it would still have the zip entries be accessible, even though there was
tons of GNU debug data following the central directory. We're not going
to be able to do that. The .com executable should be the canonical
executable. We have really good tools for automatically attaching and
configuring GDB correctly with debug symbols even when the .com is run.
We'll have to rely on those in cases where zip embedding is used.

See #53
See #54
See #68
2021-02-27 18:16:59 -08:00
..
bootstrap Fix zip executables on MacOS 2021-02-27 18:16:59 -08:00
actuallynice Add binfmt_misc workaround detector to builds 2020-08-31 20:09:23 -07:00
bochs-debugger Add binfmt_misc workaround detector to builds 2020-08-31 20:09:23 -07:00
bochs-scriptable Initial import 2020-06-15 07:18:57 -07:00
catcode Add binfmt_misc workaround detector to builds 2020-08-31 20:09:23 -07:00
config.mk Perform some code cleanup 2021-02-27 10:33:32 -08:00
definitions.mk Fix redbean zip central directory lookup 2021-02-27 12:08:28 -08:00
findtmp Apply some touchups 2021-02-07 07:02:46 -08:00
functions.mk Initial import 2020-06-15 07:18:57 -07:00
gdb Fix redbean zip central directory lookup 2021-02-27 12:08:28 -08:00
getccversion Add binfmt_misc workaround detector to builds 2020-08-31 20:09:23 -07:00
getcompile Improve build system 2021-02-19 23:03:34 -08:00
hello Improve build system 2021-02-19 23:03:34 -08:00
htags Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
includeall Add binfmt_misc workaround detector to builds 2020-08-31 20:09:23 -07:00
online.mk Improve build system 2021-02-19 23:03:34 -08:00
realify.sed Add minor improvements and cleanup 2020-10-27 03:39:46 -07:00
realify.sh Make more improvements 2020-09-28 01:20:34 -07:00
rle.py Fix XNU / FreeBSD / OpenBSD / RHEL5 / NT bugs 2021-01-25 18:31:17 -08:00
rollup Add binfmt_misc workaround detector to builds 2020-08-31 20:09:23 -07:00
rules.mk Improve build system 2021-02-19 23:03:34 -08:00
sanitycheck Add binfmt_misc workaround detector to builds 2020-08-31 20:09:23 -07:00
sanitycheck2 Fix bug in code written a priori 2020-08-31 21:02:14 -07:00
ssh Add binfmt_misc workaround detector to builds 2020-08-31 20:09:23 -07:00