Commit graph

15 commits

Author SHA1 Message Date
Justine Tunney
07004ebf04
Upgrade to superconfigure z0.0.42 2024-05-26 22:12:25 -07:00
Justine Tunney
98d06b23cc
Release Cosmopolitan v3.3.3 2024-03-30 19:24:04 -07:00
Justine Tunney
a6baba1b07
Stop using .com extension in monorepo
The WIN32 CreateProcess() function does not require an .exe or .com
suffix in order to spawn an executable. Now that we have Cosmo bash
we're no longer so dependent on the cmd.exe prompt.
2024-03-03 03:12:19 -08:00
Justine Tunney
957c61cbbf
Release Cosmopolitan v3.3
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.
2024-02-20 13:27:59 -08:00
Justine Tunney
a3deef70c2
Release Cosmopolitan v3.2 2024-01-04 09:39:48 -08:00
Justine Tunney
873069fcd7
Fix -Xaarch64 in cosmocc
It's now possible to pass flags like -Xaarch64-march=armv8.2-a+dotprod
so that cosmocc will use newer ARM ISAs. For AMD64 there's another one
worth mentioning, which looks like this: -Xx86_64-mssse3
2024-01-04 07:22:05 -08:00
Justine Tunney
307823ae00
Upgrade to superconfigure z0.0.29 2024-01-01 19:31:58 -08:00
Justine Tunney
81949f038e
Mint APE Loader v1.10 2023-12-31 11:43:13 -08:00
Justine Tunney
1bd69867d1
Explain how to build FOSS in cosmocc README 2023-12-09 06:58:24 -08:00
Justine Tunney
20938a45e6
Add appropriate chmod to README instructions
See Mozilla-Ocho/llamafile#13
2023-11-30 03:35:17 -08:00
Justine Tunney
41c06c6325
Make cosmocc 100x faster on MacOS
This change upgrades to superconfigure z0.0.23 which fixes an issue
where the compiler had harmless /home/... paths baked-in, which are
normally only present in the build environment, and usually skipped
over. Sadly on MacOS calling fstatat() on these paths would lead to
cloud file system ops that caused system calls to take a long time.
That's problematic, since cosmocc needs to be a 100% local command.
2023-11-29 01:48:17 -08:00
Justine Tunney
03de761890
Update cosmocc to use superconfigure z0.0.23 2023-11-28 20:04:15 -08:00
Justine Tunney
9f9aec013a
Do better job documenting platform issues 2023-11-14 18:15:58 -08:00
Justine Tunney
c6d3802d3a
Add more fixes for new cosmocc toolchain
We now have an `#include <cxxabi.h>` header which defines all the APIs
Cosmopolitan's implemented so far. The `cosmocc` README.md file is now
greatly expanded with documentation.
2023-11-11 23:28:19 -08:00
Justine Tunney
291103ad8d
Redesign cosmocc toolchain
The `cosmocc` compiler is now being distributed as a self-contained
toolchain that's path-agnostic and it no longer requires you clone the
Cosmop repo to use it. The bin/ folder has been deleted from the mono
repo. The `fatcosmocc` command has been renamed to `cosmocc`. MacOS
support now works very well.
2023-11-11 14:18:08 -08:00