[PATCH] uml: fix syscall table by including $(SUBARCH)'s one, for i386

Split the i386 entry.S files into entry.S and syscall_table.S which is
included in the previous one (so actually there is no difference between them)
and use the syscall_table.S in the UML build, instead of tracking by hand the
syscall table changes (which is inherently error-prone).

We must only insert the right #defines to inject the changes we need from the
i386 syscall table (for instance some different function names); also, we
don't implement some i386 syscalls, as ioperm(), nor some TLS-related ones
(yet to provide).

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 18 insertions, 1 deletions

diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile
index 71b47e61860..950781e354d 100644
--- a/arch/um/sys-i386/Makefile
+++ b/arch/um/sys-i386/Makefile
@@ -1,5 +1,6 @@
 obj-y = bitops.o bugs.o checksum.o delay.o fault.o ksyms.o ldt.o ptrace.o \
-        ptrace_user.o semaphore.o signal.o sigcontext.o syscalls.o sysrq.o
+        ptrace_user.o semaphore.o signal.o sigcontext.o syscalls.o sysrq.o \
+        sys_call_table.o
 
 obj-$(CONFIG_HIGHMEM) += highmem.o
 obj-$(CONFIG_MODULES) += module.o
diff --git a/arch/um/sys-i386/sys_call_table.S b/arch/um/sys-i386/sys_call_table.S
new file mode 100644
index 00000000000..ad75c27afe3
--- /dev/null
+++ b/arch/um/sys-i386/sys_call_table.S
@@ -0,0 +1,16 @@
+#include <linux/linkage.h>
+/* Steal i386 syscall table for our purposes, but with some slight changes.*/
+
+#define sys_iopl sys_ni_syscall
+#define sys_ioperm sys_ni_syscall
+
+#define sys_vm86old sys_ni_syscall
+#define sys_vm86 sys_ni_syscall
+#define sys_set_thread_area sys_ni_syscall
+#define sys_get_thread_area sys_ni_syscall
+
+#define sys_stime um_stime
+#define sys_time um_time
+#define old_mmap old_mmap_i386
+
+#include "../../i386/kernel/syscall_table.S"