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cosmopolitan/libc/sysv
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Justine Tunney 86d9323a43
Remove sys_getrandom() on NetBSD 
This fixes an apparent regression caused by
3f0bcdc3ef where getrandom() on NetBSD 9.2
doesn't appear to work; ktrace oddly reports:

    1446      1 .ape     CALL  #91 (unimplemented getdopt)
    1446      1 .ape     RET   #91 (unimplemented getdopt) -1 errno 78
    Function not implemented
    1446      1 .ape     PSIG  SIGSYS SIG_DFL: code=SI_NOINFO
2023-05-10 04:20:47 -07:00
..
calls Remove sys_getrandom() on NetBSD 2023-05-10 04:20:47 -07:00
consts Get LIBC_RUNTIME and LIBC_CALLS building on aarch64 2023-05-10 04:20:47 -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 Add APE fexecve() support (#733) 2023-02-22 18:58:23 -08:00
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 Get aarch64 hello world working 2023-05-10 04:20:47 -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 Fix stdio regression 2022-05-19 00:51:15 -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 Get aarch64 hello world working 2023-05-10 04:20:47 -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 Remove sys_getrandom() on NetBSD 2023-05-10 04:20:47 -07:00
syscount.S Make progress towards aarch64 build 2023-05-10 04:20:46 -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 Get aarch64 hello world working 2023-05-10 04:20:47 -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