[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>

7 files changed, 29 insertions, 116 deletions

diff --git a/arch/um/include/sysdep-i386/syscalls.h b/arch/um/include/sysdep-i386/syscalls.h
index 5db81ec9087d..be0a3e3469eb 100644
--- a/arch/um/include/sysdep-i386/syscalls.h
+++ b/arch/um/include/sysdep-i386/syscalls.h
@@ -22,102 +22,3 @@ extern syscall_handler_t old_mmap_i386;
 extern long sys_mmap2(unsigned long addr, unsigned long len,
                       unsigned long prot, unsigned long flags,
                       unsigned long fd, unsigned long pgoff);
-
-/* On i386 they choose a meaningless naming.*/
-#define __NR_kexec_load __NR_sys_kexec_load
-
-#define ARCH_SYSCALLS \
-        [ __NR_waitpid ] = (syscall_handler_t *) sys_waitpid, \
-        [ __NR_break ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_oldstat ] = (syscall_handler_t *) sys_stat, \
-        [ __NR_umount ] = (syscall_handler_t *) sys_oldumount, \
-        [ __NR_stime ] = um_stime, \
-        [ __NR_oldfstat ] = (syscall_handler_t *) sys_fstat, \
-        [ __NR_stty ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_gtty ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_nice ] = (syscall_handler_t *) sys_nice, \
-        [ __NR_ftime ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_prof ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_signal ] = (syscall_handler_t *) sys_signal, \
-        [ __NR_lock ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_mpx ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_ulimit ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_oldolduname ] = (syscall_handler_t *) sys_olduname, \
-        [ __NR_sigaction ] = (syscall_handler_t *) sys_sigaction, \
-        [ __NR_sgetmask ] = (syscall_handler_t *) sys_sgetmask, \
-        [ __NR_ssetmask ] = (syscall_handler_t *) sys_ssetmask, \
-        [ __NR_sigsuspend ] = (syscall_handler_t *) sys_sigsuspend, \
-        [ __NR_sigpending ] = (syscall_handler_t *) sys_sigpending, \
-        [ __NR_oldlstat ] = (syscall_handler_t *) sys_lstat, \
-        [ __NR_readdir ] = old_readdir, \
-        [ __NR_profil ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_socketcall ] = (syscall_handler_t *) sys_socketcall, \
-        [ __NR_olduname ] = (syscall_handler_t *) sys_uname, \
-        [ __NR_iopl ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_idle ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_ipc ] = (syscall_handler_t *) sys_ipc, \
-        [ __NR_sigreturn ] = (syscall_handler_t *) sys_sigreturn, \
-        [ __NR_sigprocmask ] = (syscall_handler_t *) sys_sigprocmask, \
-        [ __NR_bdflush ] = (syscall_handler_t *) sys_bdflush, \
-        [ __NR__llseek ] = (syscall_handler_t *) sys_llseek, \
-        [ __NR__newselect ] = (syscall_handler_t *) sys_select, \
-        [ __NR_vm86 ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_mmap ] = (syscall_handler_t *) old_mmap_i386, \
-        [ __NR_ugetrlimit ] = (syscall_handler_t *) sys_getrlimit, \
-        [ __NR_mmap2 ] = (syscall_handler_t *) sys_mmap2, \
-        [ __NR_truncate64 ] = (syscall_handler_t *) sys_truncate64, \
-        [ __NR_ftruncate64 ] = (syscall_handler_t *) sys_ftruncate64, \
-        [ __NR_stat64 ] = (syscall_handler_t *) sys_stat64, \
-        [ __NR_lstat64 ] = (syscall_handler_t *) sys_lstat64, \
-        [ __NR_fstat64 ] = (syscall_handler_t *) sys_fstat64, \
-        [ __NR_fcntl64 ] = (syscall_handler_t *) sys_fcntl64, \
-        [ __NR_sendfile64 ] = (syscall_handler_t *) sys_sendfile64, \
-        [ __NR_statfs64 ] = (syscall_handler_t *) sys_statfs64, \
-        [ __NR_fstatfs64 ] = (syscall_handler_t *) sys_fstatfs64, \
-        [ __NR_fadvise64_64 ] = (syscall_handler_t *) sys_fadvise64_64, \
-        [ __NR_select ] = (syscall_handler_t *) old_select, \
-        [ __NR_vm86old ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_modify_ldt ] = (syscall_handler_t *) sys_modify_ldt, \
-        [ __NR_lchown32 ] = (syscall_handler_t *) sys_lchown, \
-        [ __NR_getuid32 ] = (syscall_handler_t *) sys_getuid, \
-        [ __NR_getgid32 ] = (syscall_handler_t *) sys_getgid, \
-        [ __NR_geteuid32 ] = (syscall_handler_t *) sys_geteuid, \
-        [ __NR_getegid32 ] = (syscall_handler_t *) sys_getegid, \
-        [ __NR_setreuid32 ] = (syscall_handler_t *) sys_setreuid, \
-        [ __NR_setregid32 ] = (syscall_handler_t *) sys_setregid, \
-        [ __NR_getgroups32 ] = (syscall_handler_t *) sys_getgroups, \
-        [ __NR_setgroups32 ] = (syscall_handler_t *) sys_setgroups, \
-        [ __NR_fchown32 ] = (syscall_handler_t *) sys_fchown, \
-        [ __NR_setresuid32 ] = (syscall_handler_t *) sys_setresuid, \
-        [ __NR_getresuid32 ] = (syscall_handler_t *) sys_getresuid, \
-        [ __NR_setresgid32 ] = (syscall_handler_t *) sys_setresgid, \
-        [ __NR_getresgid32 ] = (syscall_handler_t *) sys_getresgid, \
-        [ __NR_chown32 ] = (syscall_handler_t *) sys_chown, \
-        [ __NR_setuid32 ] = (syscall_handler_t *) sys_setuid, \
-        [ __NR_setgid32 ] = (syscall_handler_t *) sys_setgid, \
-        [ __NR_setfsuid32 ] = (syscall_handler_t *) sys_setfsuid, \
-        [ __NR_setfsgid32 ] = (syscall_handler_t *) sys_setfsgid, \
-        [ __NR_pivot_root ] = (syscall_handler_t *) sys_pivot_root, \
-        [ __NR_mincore ] = (syscall_handler_t *) sys_mincore, \
-        [ __NR_madvise ] = (syscall_handler_t *) sys_madvise, \
-        [ 222 ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ 223 ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_set_thread_area ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_get_thread_area ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ 251 ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ 285 ] = (syscall_handler_t *) sys_ni_syscall,
-
-/* 222 doesn't yet have a name in include/asm-i386/unistd.h */
-
-#define LAST_ARCH_SYSCALL 285
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/include/sysdep-x86_64/syscalls.h b/arch/um/include/sysdep-x86_64/syscalls.h
index b187a4157ff3..65a01e3d8707 100644
--- a/arch/um/include/sysdep-x86_64/syscalls.h
+++ b/arch/um/include/sysdep-x86_64/syscalls.h
@@ -78,14 +78,3 @@ extern syscall_handler_t sys_arch_prctl;
 #define NR_syscalls 1024
 
 #endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index 280d3000111b..246f0e7fb4cc 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -10,7 +10,7 @@ obj-y = checksum.o config.o exec_kern.o exitcode.o \
         helper.o init_task.o irq.o irq_user.o ksyms.o main.o mem.o mem_user.o \
         physmem.o process.o process_kern.o ptrace.o reboot.o resource.o \
         sigio_user.o sigio_kern.o signal_kern.o signal_user.o smp.o \
-        syscall_kern.o sysrq.o sys_call_table.o tempfile.o time.o time_kern.o \
+        syscall_kern.o sysrq.o tempfile.o time.o time_kern.o \
         tlb.o trap_kern.o trap_user.o uaccess_user.o um_arch.o umid.o \
         user_util.o
 
diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile
index 71b47e618605..950781e354de 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 000000000000..ad75c27afe38
--- /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"
diff --git a/arch/um/sys-x86_64/Makefile b/arch/um/sys-x86_64/Makefile
index 2129e3143559..274158e7da3f 100644
--- a/arch/um/sys-x86_64/Makefile
+++ b/arch/um/sys-x86_64/Makefile
@@ -6,7 +6,7 @@
 
 lib-y = bitops.o bugs.o csum-partial.o delay.o fault.o mem.o memcpy.o \
         ptrace.o ptrace_user.o semaphore.o sigcontext.o signal.o \
-        syscalls.o sysrq.o thunk.o
+        syscalls.o sysrq.o thunk.o sys_call_table.o
 
 USER_OBJS := ptrace_user.o sigcontext.o
 
diff --git a/arch/um/kernel/sys_call_table.c b/arch/um/sys-x86_64/sys_call_table.c
index b671a31a0069..3f5efbfb46de 100644
--- a/arch/um/kernel/sys_call_table.c
+++ b/arch/um/sys-x86_64/sys_call_table.c
@@ -1,4 +1,4 @@
-/* 
+/*
  * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
  * Copyright 2003 PathScale, Inc.
  * Licensed under the GPL
@@ -14,6 +14,12 @@
 #include "sysdep/syscalls.h"
 #include "kern_util.h"
 
+#ifdef CONFIG_NFSD
+#define NFSSERVCTL sys_nfsservctl
+#else
+#define NFSSERVCTL sys_ni_syscall
+#endif
+
 #define LAST_GENERIC_SYSCALL __NR_keyctl
 
 #if LAST_GENERIC_SYSCALL > LAST_ARCH_SYSCALL
@@ -183,7 +189,7 @@ syscall_handler_t *sys_call_table[] = {
         [ __NR_getresuid ] = (syscall_handler_t *) sys_getresuid16,
         [ __NR_query_module ] = (syscall_handler_t *) sys_ni_syscall,
         [ __NR_poll ] = (syscall_handler_t *) sys_poll,
-        [ __NR_nfsservctl ] = (syscall_handler_t *) sys_nfsservctl,
+        [ __NR_nfsservctl ] = (syscall_handler_t *) NFSSERVCTL,
         [ __NR_setresgid ] = (syscall_handler_t *) sys_setresgid16,
         [ __NR_getresgid ] = (syscall_handler_t *) sys_getresgid16,
         [ __NR_prctl ] = (syscall_handler_t *) sys_prctl,
@@ -265,6 +271,6 @@ syscall_handler_t *sys_call_table[] = {
         [ __NR_keyctl ] = (syscall_handler_t *) sys_keyctl,
 
         ARCH_SYSCALLS
-        [ LAST_SYSCALL + 1 ... NR_syscalls ] = 
+        [ LAST_SYSCALL + 1 ... NR_syscalls ] =
                 (syscall_handler_t *) sys_ni_syscall
 };