x86: switch to generic compat rt_sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5bda2d7..0271a14 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -114,6 +114,7 @@ config X86
        select MODULES_USE_ELF_RELA if X86_64
        select CLONE_BACKWARDS if X86_32
        select GENERIC_SIGALTSTACK
+       select GENERIC_COMPAT_RT_SIGACTION
        select GENERIC_COMPAT_RT_SIGQUEUEINFO
        select GENERIC_COMPAT_RT_SIGPENDING
        select OLD_SIGSUSPEND3 if X86_32 || IA32_EMULATION

diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
index cdf22ba..ffe9751 100644 (file)
--- a/arch/x86/ia32/sys_ia32.c
+++ b/arch/x86/ia32/sys_ia32.c
@@ -172,82 +172,6 @@ asmlinkage long sys32_mprotect(unsigned long start, size_t len,
        return sys_mprotect(start, len, prot);
 }
 
-asmlinkage long sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
-                                  struct sigaction32 __user *oact,
-                                  unsigned int sigsetsize)
-{
-       struct k_sigaction new_ka, old_ka;
-       int ret;
-       compat_sigset_t set32;
-
-       /* XXX: Don't preclude handling different sized sigset_t's.  */
-       if (sigsetsize != sizeof(compat_sigset_t))
-               return -EINVAL;
-
-       if (act) {
-               compat_uptr_t handler, restorer;
-
-               if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-                   __get_user(handler, &act->sa_handler) ||
-                   __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-                   __get_user(restorer, &act->sa_restorer) ||
-                   __copy_from_user(&set32, &act->sa_mask,
-                                    sizeof(compat_sigset_t)))
-                       return -EFAULT;
-               new_ka.sa.sa_handler = compat_ptr(handler);
-               new_ka.sa.sa_restorer = compat_ptr(restorer);
-
-               /*
-                * FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
-                * than _NSIG_WORDS << 1
-                */
-               switch (_NSIG_WORDS) {
-               case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
-                               | (((long)set32.sig[7]) << 32);
-               case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
-                               | (((long)set32.sig[5]) << 32);
-               case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
-                               | (((long)set32.sig[3]) << 32);
-               case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
-                               | (((long)set32.sig[1]) << 32);
-               }
-       }
-
-       ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-       if (!ret && oact) {
-               /*
-                * FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
-                * than _NSIG_WORDS << 1
-                */
-               switch (_NSIG_WORDS) {
-               case 4:
-                       set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
-                       set32.sig[6] = old_ka.sa.sa_mask.sig[3];
-               case 3:
-                       set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
-                       set32.sig[4] = old_ka.sa.sa_mask.sig[2];
-               case 2:
-                       set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
-                       set32.sig[2] = old_ka.sa.sa_mask.sig[1];
-               case 1:
-                       set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
-                       set32.sig[0] = old_ka.sa.sa_mask.sig[0];
-               }
-               if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-                   __put_user(ptr_to_compat(old_ka.sa.sa_handler),
-                              &oact->sa_handler) ||
-                   __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
-                              &oact->sa_restorer) ||
-                   __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-                   __copy_to_user(&oact->sa_mask, &set32,
-                                  sizeof(compat_sigset_t)))
-                       return -EFAULT;
-       }
-
-       return ret;
-}
-
 asmlinkage long sys32_sigaction(int sig, struct old_sigaction32 __user *act,
                                struct old_sigaction32 __user *oact)
 {

diff --git a/arch/x86/include/asm/ia32.h b/arch/x86/include/asm/ia32.h
index 4c6da2e..259372d 100644 (file)
--- a/arch/x86/include/asm/ia32.h
+++ b/arch/x86/include/asm/ia32.h
@@ -13,14 +13,6 @@
 #include <asm/sigcontext32.h>
 
 /* signal.h */
-struct sigaction32 {
-       unsigned int  sa_handler;       /* Really a pointer, but need to deal
-                                          with 32 bits */
-       unsigned int sa_flags;
-       unsigned int sa_restorer;       /* Another 32 bit pointer */
-       compat_sigset_t sa_mask;        /* A 32 bit mask */
-};
-
 struct old_sigaction32 {
        unsigned int  sa_handler;       /* Really a pointer, but need to deal
                                           with 32 bits */

diff --git a/arch/x86/include/asm/sys_ia32.h b/arch/x86/include/asm/sys_ia32.h
index c603c8f..2bf18f1 100644 (file)
--- a/arch/x86/include/asm/sys_ia32.h
+++ b/arch/x86/include/asm/sys_ia32.h
@@ -32,10 +32,7 @@ struct mmap_arg_struct32;
 asmlinkage long sys32_mmap(struct mmap_arg_struct32 __user *);
 asmlinkage long sys32_mprotect(unsigned long, size_t, unsigned long);
 
-struct sigaction32;
 struct old_sigaction32;
-asmlinkage long sys32_rt_sigaction(int, struct sigaction32 __user *,
-                                  struct sigaction32 __user *, unsigned int);
 asmlinkage long sys32_sigaction(int, struct old_sigaction32 __user *,
                                struct old_sigaction32 __user *);
 asmlinkage long sys32_alarm(unsigned int);

diff --git a/arch/x86/syscalls/syscall_32.tbl b/arch/x86/syscalls/syscall_32.tbl
index f6006b2..2fada84 100644 (file)
--- a/arch/x86/syscalls/syscall_32.tbl
+++ b/arch/x86/syscalls/syscall_32.tbl
@@ -180,7 +180,7 @@
 171    i386    getresgid               sys_getresgid16
 172    i386    prctl                   sys_prctl
 173    i386    rt_sigreturn            sys_rt_sigreturn                stub32_rt_sigreturn
-174    i386    rt_sigaction            sys_rt_sigaction                sys32_rt_sigaction
+174    i386    rt_sigaction            sys_rt_sigaction                compat_sys_rt_sigaction
 175    i386    rt_sigprocmask          sys_rt_sigprocmask
 176    i386    rt_sigpending           sys_rt_sigpending               compat_sys_rt_sigpending
 177    i386    rt_sigtimedwait         sys_rt_sigtimedwait             compat_sys_rt_sigtimedwait

diff --git a/arch/x86/syscalls/syscall_64.tbl b/arch/x86/syscalls/syscall_64.tbl
index 6ceaa63..38ae65d 100644 (file)
--- a/arch/x86/syscalls/syscall_64.tbl
+++ b/arch/x86/syscalls/syscall_64.tbl
@@ -325,7 +325,7 @@
 # x32-specific system call numbers start at 512 to avoid cache impact
 # for native 64-bit operation.
 #
-512    x32     rt_sigaction            sys32_rt_sigaction
+512    x32     rt_sigaction            compat_sys_rt_sigaction
 513    x32     rt_sigreturn            stub_x32_rt_sigreturn
 514    x32     ioctl                   compat_sys_ioctl
 515    x32     readv                   compat_sys_readv