cosmopolitan/libc/sysv
Justine Tunney 550b52abf6
Port a lot more code to AARCH64
- Introduce epoll_pwait()
- Rewrite -ftrapv and ffs() libraries in C code
- Use more FreeBSD code in math function library
- Get significantly more tests passing on qemu-aarch64
- Fix many Musl long double functions that were broken on AARCH64
2023-05-14 09:37:26 -07:00
..
calls Port a lot more code to AARCH64 2023-05-14 09:37:26 -07:00
consts Make considerably more progress on AARCH64 2023-05-12 22:42:57 -07:00
dos2errno Improve docs of more system calls 2022-10-02 22:14:33 -07:00
errfuns Get aarch64 hello world working 2023-05-10 04:20:47 -07:00
consts.sh Work on magic numbers for aarch64 2023-05-10 04:20:48 -07:00
describeos.greg.c Remove malloc() dependency on pledge() / unveil() 2022-07-24 21:51:37 -07:00
dos2errno.sh Add WSL to test fleet 2022-11-02 06:49:42 -07:00
errfun.S Make considerably more progress on AARCH64 2023-05-12 22:42:57 -07:00
errfuns.h Get aarch64 hello world working 2023-05-10 04:20:47 -07:00
errfuns.sh Change license 2020-12-27 17:18:44 -08:00
errno.c Make considerably more progress on AARCH64 2023-05-12 22:42:57 -07:00
errno_location.greg.c Get aarch64 hello world working 2023-05-10 04:20:47 -07:00
gen.sh Get aarch64 hello world working 2023-05-10 04:20:47 -07:00
macros.internal.h Implement crash reporting for AARCH64 2023-05-12 05:47:54 -07:00
README.md Initial import 2020-06-15 07:18:57 -07:00
restorert.S Get LIBC_RUNTIME and LIBC_CALLS building on aarch64 2023-05-10 04:20:47 -07:00
strace.greg.c Make more threading improvements 2022-11-01 23:28:26 -07:00
syscall.S Get LIBC_RUNTIME and LIBC_CALLS building on aarch64 2023-05-10 04:20:47 -07:00
syscalls.sh Port a lot more code to AARCH64 2023-05-14 09:37:26 -07:00
syscount.S Make considerably more progress on AARCH64 2023-05-12 22:42:57 -07:00
sysret.c Get LIBC_RUNTIME and LIBC_CALLS building on aarch64 2023-05-10 04:20:47 -07:00
systemfive.S Make progress towards aarch64 build 2023-05-10 04:20:46 -07:00
sysv.mk Make considerably more progress on AARCH64 2023-05-12 22:42:57 -07:00

SYNOPSIS

System Five Import Libraries

OVERVIEW

Bell System Five is the umbrella term we use to describe Linux, FreeBSD, OpenBSD, and Mac OS X which all have nearly-identical application binary interfaces that stood the test of time, having definitions nearly the same as those of AT&T back in the 1980's.

Cosmopolitan aims to help you build apps that can endure over the course of decades, just like these systems have: without needing to lift a finger for maintenance churn, broken builds, broken hearts.

The challenge to System V binary compatibility basically boils down to numbers. All these systems agree on what services are provided, but tend to grant them wildly different numbers.

We address this by putting all the numbers in a couple big shell scripts, ask the GNU Assembler to encode them into binaries using an efficient LEB128 encoding, unpacked by _init(), and ref'd via extern const. It gives us good debuggability, and any costs are gained back by fewer branches in wrapper functions.z