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cosmopolitan/libc/sysv
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Justine Tunney b45d50b690 Make improvements 
- Fix build flakes
- Polyfill SIGWINCH on Windows
- Fix an execve issue on Windows
- Make strerror show more information
- Improve cmd.exe setup/teardown on Windows
- Support bracketed paste mode in Blinkenlights
- Show keyboard shortcuts in Blinkenlights status bar
- Fixed copy_file_range() and copyfile() w/ zip filesystem
- Size optimize GetDosArgv() to keep life.com 12kb in size
- Improve Blinkenlights ability to load weird ELF executables
- Fix program_executable_name and add GetInterpreterExecutableName
- Make Python in tiny mode fail better if docstrings are requested
- Update Python test exclusions in tiny* modes such as tinylinux
- Add bulletproof unbreakable kprintf() troubleshooting function
- Remove "oldskool" keyword from ape.S for virus scanners
- Fix issue that caused backtraces to not print sometimes
- Improve Blinkenlights serial uart character i/o
- Make clock_gettime() not clobber errno on xnu
- Improve sha256 cpuid check for old computers
- Integrate some bestline linenoise fixes
- Show runit process names better in htop
- Remove SIGPIPE from ShowCrashReports()
- Make realpath() not clobber errno
- Avoid attaching GDB on non-Linux
- Improve img.com example
2022-03-16 13:40:10 -07:00
..
calls Make improvements 2022-03-16 13:40:10 -07:00
consts Make improvements 2022-03-16 13:40:10 -07:00
errfuns Remove more nonstandard stuff from cosmopolitan.h 2021-03-01 00:18:23 -08:00
machcalls Productionize new APE loader and more 2021-10-02 08:27:03 -07:00
consts.sh Make improvements 2022-03-16 13:40:10 -07:00
errfuns.h Add MODE=optlinux build mode (#141) 2021-10-14 19:36:49 -07:00
errfuns.sh Change license 2020-12-27 17:18:44 -08:00
g_syscount.S Remove more nonstandard stuff from cosmopolitan.h 2021-03-01 00:18:23 -08:00
gen.sh Remove more nonstandard stuff from cosmopolitan.h 2021-03-01 00:18:23 -08:00
machcalls.sh Productionize new APE loader and more 2021-10-02 08:27:03 -07:00
macros.internal.h Make improvements 2020-12-01 03:43:40 -08:00
README.md Initial import 2020-06-15 07:18:57 -07:00
restorert.S Improve memory safety 2021-10-13 17:27:13 -07:00
syscall.S Add MODE=optlinux build mode (#141) 2021-10-14 19:36:49 -07:00
syscalls.sh Make improvements 2022-03-16 13:40:10 -07:00
systemfive.S Make improvements 2022-03-16 13:40:10 -07:00
sysv.mk Remove more nonstandard stuff from cosmopolitan.h 2021-03-01 00:18:23 -08:00

README.md

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