linux/arch/um/sys-x86_64
Jeff Dike 16dd07bc64 uml: more page fault path trimming
More trimming of the page fault path.

Permissions are passed around in a single int rather than one bit per
int.  The permission values are copied from libc so that they can be
passed to mmap and mprotect without any further conversion.

The register sets used by do_syscall_stub and copy_context_skas0 are
initialized once, at boot time, rather than once per call.

wait_stub_done checks whether it is getting the signals it expects by
comparing the wait status to a mask containing bits for the signals of
interest rather than comparing individually to the signal numbers.  It
also has one check for a wait failure instead of two.  The caller is
expected to do the initial continue of the stub.  This gets rid of an
argument and some logic.  The fname argument is gone, as that can be
had from a stack trace.

user_signal() is collapsed into userspace() as it is basically one or
two lines of code afterwards.

The physical memory remapping stuff is gone, as it is unused.

flush_tlb_page is inlined.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-07 12:13:04 -07:00
..
Makefile [PATCH] UML: add generic BUG support 2006-12-08 08:28:39 -08:00
bug.c [PATCH] UML: add generic BUG support 2006-12-08 08:28:39 -08:00
bugs.c uml: remove unused x86_64 code 2007-05-07 12:13:03 -07:00
delay.c [PATCH] uml: fix unreasonably long udelay 2007-04-02 10:06:08 -07:00
fault.c uml: tidy fault code 2007-05-07 12:13:02 -07:00
ksyms.c [PATCH] uml: remove duplicate export 2006-10-11 11:14:20 -07:00
mem.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ptrace.c [PATCH] uml: x86_64 ptrace fixes 2007-02-11 10:51:24 -08:00
ptrace_user.c [PATCH] uml: initialize process FP registers properly 2006-02-07 16:12:32 -08:00
setjmp.S [PATCH] uml: Use klibc setjmp/longjmp 2006-09-26 08:49:05 -07:00
sigcontext.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
signal.c uml: kernel segfaults should dump proper registers 2007-05-07 12:13:02 -07:00
stub.S [PATCH] uml: skas0 stubs now check system call return values 2005-09-05 00:06:24 -07:00
stub_segv.c [PATCH] make UML compile (FC6/x86-64) 2006-10-15 14:18:39 -07:00
syscall_table.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2006-06-30 15:39:30 -07:00
syscalls.c [PATCH] uml: arch_prctl should set thread fs 2007-03-08 07:38:22 -08:00
sysrq.c [PATCH] namespaces: utsname: use init_utsname when appropriate 2006-10-02 07:57:21 -07:00
tls.c [PATCH] uml: x86_64 thread fixes 2007-02-11 10:51:24 -08:00
um_module.c [PATCH] uml: kludgy compilation fixes for x86-64 subarch modules support 2005-05-05 16:36:33 -07:00
unmap.c [PATCH] Fix "Remove the use of _syscallX macros in UML" 2006-10-30 12:08:41 -08:00
user-offsets.c uml: more page fault path trimming 2007-05-07 12:13:04 -07:00