[PATCH][COMPAT] compat_sys_sigpending and compat_sys_sigprocmask

[Stephen Rothwell]

Hi Linus,

This patch creates compat_sys_sigpending and compat_sys_sigprocmask
and removes all the arch specific versions.  It requires my previous
patch ("PATCH][COMPAT] compat_{old_}sigset_t").  The diffstat of
the entire patch is below, but here I have included only the generic
part.

 arch/ia64/ia32/ia32_entry.S       |    4 +-
 arch/ia64/ia32/ia32_signal.c      |    6 ----
 arch/ia64/ia32/sys_ia32.c         |    6 ----
 arch/mips64/kernel/scall_o32.S    |    4 +-
 arch/mips64/kernel/signal32.c     |   38 ----------------------------
 arch/parisc/kernel/signal32.c     |   51 --------------------------------------
 arch/parisc/kernel/syscall.S      |    4 +-
 arch/ppc64/kernel/misc.S          |    4 +-
 arch/ppc64/kernel/signal32.c      |   50 -------------------------------------
 arch/s390x/kernel/entry.S         |    4 +-
 arch/s390x/kernel/linux32.c       |   32 -----------------------
 arch/s390x/kernel/wrapper32.S     |   18 ++++++-------
 arch/sparc64/kernel/sys_sparc32.c |   32 -----------------------
 arch/sparc64/kernel/systbls.S     |    6 ++--
 arch/x86_64/ia32/ia32entry.S      |    4 +-
 arch/x86_64/ia32/sys_ia32.c       |   35 --------------------------
 kernel/compat.c                   |   44 ++++++++++++++++++++++++++++++++
 17 files changed, 67 insertions(+), 275 deletions(-)

-- 
Cheers,
Stephen Rothwell                    [e-mail]
http://www.canb.auug.org.au/~sfr/

diff -ruN 2.5.58-32bit.5/kernel/compat.c 2.5.58-32bit.6/kernel/compat.c
--- 2.5.58-32bit.5/kernel/compat.c	2003-01-09 16:24:07.000000000 +1100
+++ 2.5.58-32bit.6/kernel/compat.c	2003-01-16 11:26:43.000000000 +1100
@@ -4,7 +4,7 @@
  *  Kernel compatibililty routines for e.g. 32 bit syscall support
  *  on 64 bit kernels.
  *
- *  Copyright (C) 2002 Stephen Rothwell, IBM Corporation
+ *  Copyright (C) 2002-2003 Stephen Rothwell, IBM Corporation
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License version 2 as
@@ -15,6 +15,7 @@
 #include <linux/compat.h>
 #include <linux/errno.h>
 #include <linux/time.h>
+#include <linux/signal.h>
 
 #include <asm/uaccess.h>
 
@@ -166,3 +167,44 @@
 	}
 	return compat_jiffies_to_clock_t(jiffies);
 }
+
+/*
+ * Assumption: old_sigset_t and compat_old_sigset_t are both
+ * types that can be passed to put_user()/get_user().
+ */
+
+extern asmlinkage long sys_sigpending(old_sigset_t *);
+
+asmlinkage long compat_sys_sigpending(compat_old_sigset_t *set)
+{
+	old_sigset_t s;
+	long ret;
+	mm_segment_t old_fs = get_fs();
+
+	set_fs(KERNEL_DS);
+	ret = sys_sigpending(&s);
+	set_fs(old_fs);
+	if (ret == 0)
+		ret = put_user(s, set);
+	return ret;
+}
+
+extern asmlinkage long sys_sigprocmask(int, old_sigset_t *, old_sigset_t *);
+
+asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t *set,
+		compat_old_sigset_t *oset)
+{
+	old_sigset_t s;
+	long ret;
+	mm_segment_t old_fs;
+
+	if (set && get_user(s, set))
+		return -EFAULT;
+	old_fs = get_fs();
+	set_fs(KERNEL_DS);
+	ret = sys_sigprocmask(how, set ? &s : NULL, oset ? &s : NULL);
+	set_fs(old_fs);
+	if (ret == 0)
+		ret = put_user(s, oset);
+	return ret;
+}