tree 1ae614424b48069950baec8ae09699d750fe3414
parent 1bcdaeee6e659f1d856717c9aa562a068f2f3bd4
author Rich Felker <dalias@aerifal.cx> 1554941479 -0400
committer Rich Felker <dalias@aerifal.cx> 1554941479 -0400

remove external __syscall function and last remaining users

the weak version of __syscall_cp_c was using a tail call to __syscall
to avoid duplicating the 6-argument syscall code inline in small
static-linked programs, but now that __syscall no longer exists, the
inline expansion is no longer duplication.

the syscall.h machinery suppported up to 7 syscall arguments, only via
an external __syscall function, but we presently have no syscall call
points that actually make use of that many, and the kernel only
defines 7-argument calling conventions for arm, powerpc (32-bit), and
sh. if it turns out we need them in the future, they can easily be
added.