cosmopolitan/libc
Justine Tunney 8f522cb702
Make improvements
This change progresses our AARCH64 support:

- The AARCH64 build and tests are now passing
- Add 128-bit floating-point support to printf()
- Fix clone() so it initializes cosmo's x28 TLS register
- Fix TLS memory layout issue with aarch64 _Alignas vars
- Revamp microbenchmarking tools so they work on aarch64
- Make some subtle improvements to aarch64 crash reporting
- Make kisdangerous() memory checks more accurate on aarch64
- Remove sys_open() since it's not available on Linux AARCH64

This change makes general improvements to Cosmo and Redbean:

- Introduce GetHostIsa() function in Redbean
- You can now feature check using pledge(0, 0)
- You can now feature check using unveil("",0)
- Refactor some more x86-specific asm comments
- Refactor and write docs for some libm functions
- Make the mmap() API behave more similar to Linux
- Fix WIFSIGNALED() which wrongly returned true for zero
- Rename some obscure cosmo keywords from noFOO to dontFOO
2023-06-03 08:12:22 -07:00
..
calls Make improvements 2023-06-03 08:12:22 -07:00
crt [metal] Fix some issues that were breaking UEFI boot (#822) 2023-05-26 18:29:25 -07:00
dns Fix regression in DNS client 2023-05-10 23:27:10 -07:00
elf Get llama.com building as an aarch64 native binary 2023-05-10 04:20:47 -07:00
fmt Perform some code cleanup 2023-05-15 16:32:10 -07:00
integral Make improvements 2023-06-03 08:12:22 -07:00
intrin Make improvements 2023-06-03 08:12:22 -07:00
isystem Perform some code cleanup 2023-05-15 16:32:10 -07:00
linux Port a lot more code to AARCH64 2023-05-14 09:37:26 -07:00
log Make improvements 2023-06-03 08:12:22 -07:00
mem Get TEST_LIBC_STR passing on AARCH64 2023-05-12 18:09:23 -07:00
nexgen32e Make improvements 2023-06-03 08:12:22 -07:00
nt Introduce native support for MacOS ARM64 2023-05-20 04:17:03 -07:00
runtime Make improvements 2023-06-03 08:12:22 -07:00
sock Introduce native support for MacOS ARM64 2023-05-20 04:17:03 -07:00
stdio Make improvements 2023-06-03 08:12:22 -07:00
str Introduce native support for MacOS ARM64 2023-05-20 04:17:03 -07:00
stubs Introduce native support for MacOS ARM64 2023-05-20 04:17:03 -07:00
sysv Make improvements 2023-06-03 08:12:22 -07:00
testlib Make improvements 2023-06-03 08:12:22 -07:00
thread Make improvements 2023-06-03 08:12:22 -07:00
time Make improvements 2023-06-03 08:12:22 -07:00
tinymath Make improvements 2023-06-03 08:12:22 -07:00
vga Get LIBC_TESTLIB building on AARCH64 2023-05-11 19:57:09 -07:00
x Port a lot more code to AARCH64 2023-05-14 09:37:26 -07:00
zipos Make AARCH64 harder, better, faster, stronger 2023-05-15 02:15:34 -07:00
ar.h Add a turfwar hilbert decoration 2023-01-03 18:28:35 -08:00
assert.h Introduce native support for MacOS ARM64 2023-05-20 04:17:03 -07:00
atomic.h Optimize memory layout 2022-09-12 04:26:52 -07:00
complex.h Port a lot more code to AARCH64 2023-05-14 09:37:26 -07:00
dce.h Introduce native support for MacOS ARM64 2023-05-20 04:17:03 -07:00
disclaimer.inc
dos.h
empty.s Do some basic build tuning 2023-05-10 04:20:46 -07:00
errno.h Improve cancellations, randomness, and time 2022-11-05 23:45:32 -07:00
imag.internal.h Remove evil constants from cosmopolitan.h 2022-12-17 00:42:45 -08:00
inttypes.h Fix inttypes.h FAST16 macros to have a correct definition (#791) 2023-03-29 00:19:40 -07:00
iso646.internal.h Add more missing C / C++ headers 2022-09-04 04:53:52 -07:00
libc.mk Add VGA support on bare metal (#588) 2022-09-06 18:41:08 -07:00
limits.h Improve cosmo's conformance to libc-test 2022-10-10 17:52:41 -07:00
literal.h Improve cosmo's conformance to libc-test 2022-10-10 17:52:41 -07:00
mach.h
macho.internal.h Fiddle around with Mach-O 2023-05-20 04:13:49 -07:00
macros.internal.h Make improvements 2023-06-03 08:12:22 -07:00
math.h Make more ML improvements 2023-05-16 08:07:23 -07:00
notice.inc
notice.internal.h
paths.h Embed cocmd.com interpreter for system() / open() 2022-10-02 15:29:57 -07:00
README.md Reformat libc README.md (#437) 2022-06-21 07:50:42 -07:00
stdalign.internal.h Add more missing C / C++ headers 2022-09-04 04:53:52 -07:00
type2str.h Improve synchronization 2022-04-15 15:31:55 -07:00
zip.h Fold LIBC_BITS into LIBC_INTRIN 2022-08-11 12:13:18 -07:00

Cosmopolitan Standard Library

This directory defines static archives defining functions, like printf(), mmap(), win32, etc. Please note that the Cosmopolitan build configuration doesn't link any C/C++ library dependencies by default, so you still have the flexibility to choose the one provided by your system. If you'd prefer Cosmopolitan, just add $(LIBC) and $(CRT) to your linker arguments.

Your library is compromised of many bite-sized static archives. We use the checkdeps tool to guarantee that the contents of the archives are organized in a logical way that's easy to use with or without our makefile infrastructure, since there's no cyclic dependencies.

The Cosmopolitan Library exports only the most stable canonical system calls for all supported operating systems, regardless of which platform is used for compilation. We polyfill many of the APIs, e.g. read(), write() so they work consistently everywhere while other apis, e.g. CreateWindowEx(), might only work on one platform, in which case they become no-op functions on others.

Cosmopolitan polyfill wrappers will usually use the dollar sign naming convention, so they may be bypassed when necessary. This same convention is used when multiple implementations of string library and other performance-critical function are provided to allow Cosmopolitan to go fast on both old and newer computers.

We take an approach to configuration that relies heavily on the compiler's dead code elimination pass (libc/dce.h). Most of the code is written so that, for example, folks not wanting support for OpenBSD can flip a bit in SUPPORT_VECTOR and that code will be omitted from the build. The same is true for builds that are tuned using -march=native which effectively asks the library to not include runtime support hooks for x86 processors older than what you use.

Please note that, unlike Cygwin or MinGW, Cosmopolitan does not achieve broad support by bolting on a POSIX emulation layer. We do nothing more than (in most cases) stateless API translations that get you 90% of the way there in a fast lightweight manner. We therefore can't address some of the subtle differences, such as the nuances of absolute paths on Windows. Our approach could be compared to something more along the lines of, "the Russians just used a pencil to write in space", versus spending millions researching a pen like NASA.