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(parent: f2b1f1a) | patch
i386 vsyscall support (vdso-provided sysenter/syscall instruction based)
authorRich Felker <dalias@aerifal.cx>
Fri, 12 Oct 2012 02:47:07 +0000 (22:47 -0400)
committerRich Felker <dalias@aerifal.cx>
Fri, 12 Oct 2012 02:47:07 +0000 (22:47 -0400)
commit12e9b4faf68a1a02ebf5ad69c03ac10f170f14cb
treef206db332e670791be0120cb21cc5eee9bc23574tree | snapshot
parentf2b1f1af83e96f8f98fbf2a5c663d8d058f2a66dcommit | diff
i386 vsyscall support (vdso-provided sysenter/syscall instruction based)

this doubles the performance of the fastest syscalls on the atom I
tested it on; improvement is reportedly much more dramatic on
worst-case cpus. cannot be used for cancellable syscalls.
arch/i386/syscall_arch.h diff | blob | history
src/env/__libc_start_main.c diff | blob | history
src/internal/i386/syscall.s diff | blob | history
src/internal/libc.c diff | blob | history
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