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957c61cbbf
This change upgrades to GCC 12.3 and GNU binutils 2.42. The GNU linker appears to have changed things so that only a single de-duplicated str table is present in the binary, and it gets placed wherever the linker wants, regardless of what the linker script says. To cope with that we need to stop using .ident to embed licenses. As such, this change does significant work to revamp how third party licenses are defined in the codebase, using `.section .notice,"aR",@progbits`. This new GCC 12.3 toolchain has support for GNU indirect functions. It lets us support __target_clones__ for the first time. This is used for optimizing the performance of libc string functions such as strlen and friends so far on x86, by ensuring AVX systems favor a second codepath that uses VEX encoding. It shaves some latency off certain operations. It's a useful feature to have for scientific computing for the reasons explained by the test/libcxx/openmp_test.cc example which compiles for fifteen different microarchitectures. Thanks to the upgrades, it's now also possible to use newer instruction sets, such as AVX512FP16, VNNI. Cosmo now uses the %gs register on x86 by default for TLS. Doing it is helpful for any program that links `cosmo_dlopen()`. Such programs had to recompile their binaries at startup to change the TLS instructions. That's not great, since it means every page in the executable needs to be faulted. The work of rewriting TLS-related x86 opcodes, is moved to fixupobj.com instead. This is great news for MacOS x86 users, since we previously needed to morph the binary every time for that platform but now that's no longer necessary. The only platforms where we need fixup of TLS x86 opcodes at runtime are now Windows, OpenBSD, and NetBSD. On Windows we morph TLS to point deeper into the TIB, based on a TlsAlloc assignment, and on OpenBSD/NetBSD we morph %gs back into %fs since the kernels do not allow us to specify a value for the %gs register. OpenBSD users are now required to use APE Loader to run Cosmo binaries and assimilation is no longer possible. OpenBSD kernel needs to change to allow programs to specify a value for the %gs register, or it needs to stop marking executable pages loaded by the kernel as mimmutable(). This release fixes __constructor__, .ctor, .init_array, and lastly the .preinit_array so they behave the exact same way as glibc. We no longer use hex constants to define math.h symbols like M_PI. |
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|---|---|---|
| .. | ||
| gz | ||
| adler32.c | ||
| adler32_simd.c | ||
| adler32_simd.inc | ||
| BUILD.mk | ||
| chunkcopy.inc | ||
| compress.c | ||
| cpu_features.c | ||
| cpu_features.internal.h | ||
| crc32.c | ||
| crc32.inc | ||
| crc32_simd.c | ||
| crc32_simd.internal.h | ||
| crc_folding.c | ||
| deflate.c | ||
| deflate.internal.h | ||
| infback.c | ||
| inffast.c | ||
| inffast.internal.h | ||
| inffast_chunk.c | ||
| inffast_chunk.internal.h | ||
| inffixed.inc | ||
| inflate.c | ||
| inflate.internal.h | ||
| inftrees.c | ||
| inftrees.internal.h | ||
| insert_string.inc | ||
| internal.h | ||
| LICENSE | ||
| LICENSE.chromium | ||
| LICENSE.zlib | ||
| macros.internal.h | ||
| notice.c | ||
| README.cosmo | ||
| slide_hash_simd.inc | ||
| treeconst.c | ||
| trees.c | ||
| trees.inc | ||
| uncompr.c | ||
| zconf.h | ||
| zlib.h | ||
| zutil.c | ||
| zutil.internal.h | ||
DESCRIPTION
zlib implements the deflate compression algorithm
LICENSE
See LICENSE file
ORIGIN
The zlib sources were obtained from Chromium's zlib fork.
https://chromium.googlesource.com/chromium/src/third_party/zlib
commit 14dd4c4455602c9b71a1a89b5cafd1f4030d2e3f
Author: Adenilson Cavalcanti <cavalcantii@chromium.org>
Date: Tue Apr 11 17:40:40 2023 +0000
The source code for puff was obtained from zlib itself:
Origin: git@github.com:madler/zlib.git
Commit: 03614c56ad299f9b238c75aa1e66f0c08fc4fc8b
Author: Mark Adler <madler@alumni.caltech.edu>
Date: Sun Oct 30 08:36:13 2016 -0700
LOCAL CHANGES
- Use X86_HAVE() for runtime dispatching
- Changed Trace(stderr) calls to use kprintf()
- Made the type signature of crc32_z() less obnoxious
- Fix a Chromium Zlib regression where malloc() failures inside
deflateInit2() will result in a segmentation fault
- Provide THIRD_PARTY_ZLIB_GZ as a separate package, because it
can't work without malloc/stdio/etc. but the rest of zlib can