musl/arch/x86_64
Rich Felker d00ff2950e overhaul syscall interface
this commit shuffles around the location of syscall definitions so
that we can make a syscall() library function with both SYS_* and
__NR_* style syscall names available to user applications, provides
the syscall() library function, and optimizes the code that performs
the actual inline syscalls in the library itself.

previously on i386 when built as PIC (shared library), syscalls were
incurring bus lock (lock prefix) overhead at entry and exit, due to
the way the ebx register was being loaded (xchg instruction with a
memory operand). now the xchg takes place between two registers.

further cleanup to arch/$(ARCH)/syscall.h is planned.
2011-03-19 18:51:42 -04:00
..
bits overhaul syscall interface 2011-03-19 18:51:42 -04:00
atomic.h optimize contended normal mutex case; add int compare-and-swap atomic 2011-03-17 12:14:40 -04:00
pthread_arch.h Port musl to x86-64. One giant commit! 2011-02-15 07:32:09 -05:00
syscall.h overhaul syscall interface 2011-03-19 18:51:42 -04:00