x86: switch to generic old sigaction

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

11 files changed, 6 insertions, 148 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 0271a1411af3..87d09175a0a9 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -118,6 +118,8 @@ config X86
         select GENERIC_COMPAT_RT_SIGQUEUEINFO
         select GENERIC_COMPAT_RT_SIGPENDING
         select OLD_SIGSUSPEND3 if X86_32 || IA32_EMULATION
+        select OLD_SIGACTION if X86_32
+        select COMPAT_OLD_SIGACTION if IA32_EMULATION
 
 config INSTRUCTION_DECODER
         def_bool y
diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
index ffe9751b1486..592f5a9a9c0e 100644
--- a/arch/x86/ia32/sys_ia32.c
+++ b/arch/x86/ia32/sys_ia32.c
@@ -172,45 +172,6 @@ asmlinkage long sys32_mprotect(unsigned long start, size_t len,
         return sys_mprotect(start, len, prot);
 }
 
-asmlinkage long sys32_sigaction(int sig, struct old_sigaction32 __user *act,
-                                struct old_sigaction32 __user *oact)
-{
-        struct k_sigaction new_ka, old_ka;
-        int ret;
-
-        if (act) {
-                compat_old_sigset_t mask;
-                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) ||
-                    __get_user(mask, &act->sa_mask))
-                        return -EFAULT;
-
-                new_ka.sa.sa_handler = compat_ptr(handler);
-                new_ka.sa.sa_restorer = compat_ptr(restorer);
-
-                siginitset(&new_ka.sa.sa_mask, mask);
-        }
-
-        ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-        if (!ret && oact) {
-                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) ||
-                    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-                        return -EFAULT;
-        }
-
-        return ret;
-}
-
 asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int __user *stat_addr,
                               int options)
 {
diff --git a/arch/x86/include/asm/ia32.h b/arch/x86/include/asm/ia32.h
index 259372d1ee96..d0e8e0141041 100644
--- a/arch/x86/include/asm/ia32.h
+++ b/arch/x86/include/asm/ia32.h
@@ -13,13 +13,6 @@
 #include <asm/sigcontext32.h>
 
 /* signal.h */
-struct old_sigaction32 {
-        unsigned int  sa_handler;       /* Really a pointer, but need to deal
-                                           with 32 bits */
-        compat_old_sigset_t sa_mask;    /* A 32 bit mask */
-        unsigned int sa_flags;
-        unsigned int sa_restorer;       /* Another 32 bit pointer */
-};
 
 struct ucontext_ia32 {
         unsigned int      uc_flags;
diff --git a/arch/x86/include/asm/signal.h b/arch/x86/include/asm/signal.h
index 9bda8224f3d5..35e67a457182 100644
--- a/arch/x86/include/asm/signal.h
+++ b/arch/x86/include/asm/signal.h
@@ -34,15 +34,6 @@ extern void do_notify_resume(struct pt_regs *, void *, __u32);
 
 #define __ARCH_HAS_SA_RESTORER
 
-#ifdef __i386__
-struct old_sigaction {
-        __sighandler_t sa_handler;
-        old_sigset_t sa_mask;
-        unsigned long sa_flags;
-        __sigrestore_t sa_restorer;
-};
-
-#endif /* !__i386__ */
 #include <asm/sigcontext.h>
 
 #ifdef __i386__
diff --git a/arch/x86/include/asm/sys_ia32.h b/arch/x86/include/asm/sys_ia32.h
index 2bf18f1158bc..0218d917f509 100644
--- a/arch/x86/include/asm/sys_ia32.h
+++ b/arch/x86/include/asm/sys_ia32.h
@@ -32,9 +32,6 @@ struct mmap_arg_struct32;
 asmlinkage long sys32_mmap(struct mmap_arg_struct32 __user *);
 asmlinkage long sys32_mprotect(unsigned long, size_t, unsigned long);
 
-struct old_sigaction32;
-asmlinkage long sys32_sigaction(int, struct old_sigaction32 __user *,
-                                struct old_sigaction32 __user *);
 asmlinkage long sys32_alarm(unsigned int);
 
 asmlinkage long sys32_waitpid(compat_pid_t, unsigned int __user *, int);
diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h
index 7ed7dec7fb0e..6cf0a9cc60cd 100644
--- a/arch/x86/include/asm/syscalls.h
+++ b/arch/x86/include/asm/syscalls.h
@@ -34,8 +34,6 @@ asmlinkage int sys_get_thread_area(struct user_desc __user *);
 #ifdef CONFIG_X86_32
 
 /* kernel/signal.c */
-asmlinkage int sys_sigaction(int, const struct old_sigaction __user *,
-                             struct old_sigaction __user *);
 unsigned long sys_sigreturn(void);
 
 /* kernel/vm86_32.c */
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index 057712901509..d5b1f8a912ff 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -535,53 +535,6 @@ static int x32_setup_rt_frame(int sig, struct k_sigaction *ka,
         return 0;
 }
 
-#ifdef CONFIG_X86_32
-asmlinkage int
-sys_sigaction(int sig, const struct old_sigaction __user *act,
-              struct old_sigaction __user *oact)
-{
-        struct k_sigaction new_ka, old_ka;
-        int ret = 0;
-
-        if (act) {
-                old_sigset_t mask;
-
-                if (!access_ok(VERIFY_READ, act, sizeof(*act)))
-                        return -EFAULT;
-
-                get_user_try {
-                        get_user_ex(new_ka.sa.sa_handler, &act->sa_handler);
-                        get_user_ex(new_ka.sa.sa_flags, &act->sa_flags);
-                        get_user_ex(mask, &act->sa_mask);
-                        get_user_ex(new_ka.sa.sa_restorer, &act->sa_restorer);
-                } get_user_catch(ret);
-
-                if (ret)
-                        return -EFAULT;
-                siginitset(&new_ka.sa.sa_mask, mask);
-        }
-
-        ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-        if (!ret && oact) {
-                if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
-                        return -EFAULT;
-
-                put_user_try {
-                        put_user_ex(old_ka.sa.sa_handler, &oact->sa_handler);
-                        put_user_ex(old_ka.sa.sa_flags, &oact->sa_flags);
-                        put_user_ex(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
-                        put_user_ex(old_ka.sa.sa_restorer, &oact->sa_restorer);
-                } put_user_catch(ret);
-
-                if (ret)
-                        return -EFAULT;
-        }
-
-        return ret;
-}
-#endif /* CONFIG_X86_32 */
-
 /*
  * Do a signal return; undo the signal stack.
  */
diff --git a/arch/x86/syscalls/syscall_32.tbl b/arch/x86/syscalls/syscall_32.tbl
index 2fada84c16ab..f2fe78ff22cc 100644
--- a/arch/x86/syscalls/syscall_32.tbl
+++ b/arch/x86/syscalls/syscall_32.tbl
@@ -73,7 +73,7 @@
 64      i386    getppid                 sys_getppid
 65      i386    getpgrp                 sys_getpgrp
 66      i386    setsid                  sys_setsid
-67      i386    sigaction               sys_sigaction                   sys32_sigaction
+67      i386    sigaction               sys_sigaction                   compat_sys_sigaction
 68      i386    sgetmask                sys_sgetmask
 69      i386    ssetmask                sys_ssetmask
 70      i386    setreuid                sys_setreuid16
diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig
index a3725824449e..cf0f2731484e 100644
--- a/arch/x86/um/Kconfig
+++ b/arch/x86/um/Kconfig
@@ -26,6 +26,7 @@ config X86_32
         select MODULES_USE_ELF_REL
         select CLONE_BACKWARDS
         select OLD_SIGSUSPEND3
+        select OLD_SIGACTION
 
 config X86_64
         def_bool 64BIT
diff --git a/arch/x86/um/Makefile b/arch/x86/um/Makefile
index 5d065b2222d3..eafa324eb7a5 100644
--- a/arch/x86/um/Makefile
+++ b/arch/x86/um/Makefile
@@ -10,7 +10,7 @@ endif
 
 obj-y = bug.o bugs_$(BITS).o delay.o fault.o ksyms.o ldt.o \
         ptrace_$(BITS).o ptrace_user.o setjmp_$(BITS).o signal.o \
-        stub_$(BITS).o stub_segv.o syscalls_$(BITS).o \
+        stub_$(BITS).o stub_segv.o \
         sys_call_table_$(BITS).o sysrq_$(BITS).o tls_$(BITS).o \
         mem_$(BITS).o subarch.o os-$(OS)/
 
@@ -25,7 +25,7 @@ subarch-$(CONFIG_HIGHMEM) += ../mm/highmem_32.o
 
 else
 
-obj-y += vdso/
+obj-y += syscalls_64.o vdso/
 
 subarch-y = ../lib/csum-partial_64.o ../lib/memcpy_64.o ../lib/thunk_64.o \
                 ../lib/rwsem.o
diff --git a/arch/x86/um/syscalls_32.c b/arch/x86/um/syscalls_32.c
deleted file mode 100644
index e8bcea99acdb..000000000000
--- a/arch/x86/um/syscalls_32.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/* 
- * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
- * Licensed under the GPL
- */
-
-#include <linux/syscalls.h>
-#include <sysdep/syscalls.h>
-
-long sys_sigaction(int sig, const struct old_sigaction __user *act,
-                         struct old_sigaction __user *oact)
-{
-        struct k_sigaction new_ka, old_ka;
-        int ret;
-
-        if (act) {
-                old_sigset_t mask;
-                if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-                    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
-                    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
-                    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-                    __get_user(mask, &act->sa_mask))
-                        return -EFAULT;
-                siginitset(&new_ka.sa.sa_mask, mask);
-        }
-
-        ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-        if (!ret && oact) {
-                if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-                    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
-                    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
-                    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-                    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-                        return -EFAULT;
-        }
-
-        return ret;
-}