f7c7b949fd
Justine says nay for the time being. Only XNU implements this. It's not clear what ABI XNU is using but it's obviously not the one in the POSIX documentation link below. Since all platforms implement vfork, it might be better to empirically gauge the intersection of consensus which will have better performance than this interface. https://pubs.opengroup.org/onlinepubs/009696699/xrat/xsh_chap03.html |
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| .. | ||
| calls | ||
| consts | ||
| errfuns | ||
| machcalls | ||
| consensus.py | ||
| consts.sh | ||
| errfuns.h | ||
| errfuns.sh | ||
| g_syscount.S | ||
| gen.sh | ||
| machcalls.sh | ||
| macros.internal.h | ||
| nr.py | ||
| README.md | ||
| restorert.S | ||
| syscall.S | ||
| syscalls.sh | ||
| systemfive.S | ||
| sysv.mk | ||
| versions.txt | ||
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