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cosmopolitan/libc/sysv
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Justine Tunney 0cb6b6ff4b Get Redbean fork() working on the New Technology 
Now that we have understandable system call tracing on Windows, this
change rewrites many of the polyfill internals for that platform, to
help things get closer to tip top shape. Support for complex forking
scenarios had been in a regressed state for quite some time. Now, it
works! Subsequent changes should be able to address the performance.
2022-03-20 08:01:14 -07:00
..
calls Make improvements 2022-03-16 13:40:10 -07:00
consts Get Redbean fork() working on the New Technology 2022-03-20 08:01:14 -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 Get Redbean fork() working on the New Technology 2022-03-20 08:01:14 -07:00
describeos.greg.c Introduce --strace flag for system call tracing 2022-03-18 18:07:28 -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 Clean old .source directive out of asm code 2022-03-18 12:43:21 -07:00
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 Clean old .source directive out of asm code 2022-03-18 12:43:21 -07:00
strace.greg.c Introduce --strace flag for system call tracing 2022-03-18 18:07:28 -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 Get Redbean fork() working on the New Technology 2022-03-20 08:01:14 -07:00
sysv.mk Introduce --strace flag for system call tracing 2022-03-18 18:07:28 -07:00

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