Add generic sys_old_select()

Add a generic implementation of the old select() syscall, which expects its argument in a memory block and switch all architectures over to use it. Signed-off-by: Christoph Hellwig <[email protected]> Cc: Ralf Baechle <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mundt <[email protected]> Cc: Jeff Dike <[email protected]> Cc: Hirokazu Takata <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Reviewed-by: H. Peter Anvin <[email protected]> Cc: Al Viro <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: "Luck, Tony" <[email protected]> Cc: James Morris <[email protected]> Acked-by: Andreas Schwab <[email protected]> Acked-by: Russell King <[email protected]> Acked-by: Greg Ungerer <[email protected]> Acked-by: David Howells <[email protected]> Cc: Andreas Schwab <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
RyanHsu · Mar 12, 2010 · 5d0e528 · 5d0e528
1 parent 724ee62
commit 5d0e528
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Showing 27 changed files with 52 additions and 152 deletions.
diff --git a/arch/arm/include/asm/unistd.h b/arch/arm/include/asm/unistd.h
@@ -443,6 +443,7 @@
 #define __ARCH_WANT_SYS_SIGPROCMASK
 #define __ARCH_WANT_SYS_RT_SIGACTION
 #define __ARCH_WANT_SYS_RT_SIGSUSPEND
+#define __ARCH_WANT_SYS_OLD_SELECT
 
 #if !defined(CONFIG_AEABI) || defined(CONFIG_OABI_COMPAT)
 #define __ARCH_WANT_SYS_TIME

diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
@@ -91,7 +91,7 @@
 		CALL(sys_settimeofday)
 /* 80 */	CALL(sys_getgroups16)
 		CALL(sys_setgroups16)
-		CALL(OBSOLETE(old_select))	/* used by libc4 */
+		CALL(OBSOLETE(sys_old_select))	/* used by libc4 */
 		CALL(sys_symlink)
 		CALL(sys_ni_syscall)		/* was sys_lstat */
 /* 85 */	CALL(sys_readlink)

diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c
@@ -54,27 +54,6 @@ asmlinkage int old_mmap(struct mmap_arg_struct __user *arg)
 	return error;
 }
 
-/*
- * Perform the select(nd, in, out, ex, tv) and mmap() system
- * calls.
- */
-
-struct sel_arg_struct {
-	unsigned long n;
-	fd_set __user *inp, *outp, *exp;
-	struct timeval __user *tvp;
-};
-
-asmlinkage int old_select(struct sel_arg_struct __user *arg)
-{
-	struct sel_arg_struct a;
-
-	if (copy_from_user(&a, arg, sizeof(a)))
-		return -EFAULT;
-	/* sys_select() does the appropriate kernel locking */
-	return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
-}
-
 #if !defined(CONFIG_AEABI) || defined(CONFIG_OABI_COMPAT)
 /*
  * sys_ipc() is the de-multiplexer for the SysV IPC calls..

diff --git a/arch/h8300/include/asm/unistd.h b/arch/h8300/include/asm/unistd.h
@@ -348,6 +348,7 @@
 #define __ARCH_WANT_SYS_LLSEEK
 #define __ARCH_WANT_SYS_NICE
 #define __ARCH_WANT_SYS_OLD_GETRLIMIT
+#define __ARCH_WANT_SYS_OLD_SELECT
 #define __ARCH_WANT_SYS_OLDUMOUNT
 #define __ARCH_WANT_SYS_SIGPENDING
 #define __ARCH_WANT_SYS_SIGPROCMASK

diff --git a/arch/h8300/kernel/sys_h8300.c b/arch/h8300/kernel/sys_h8300.c
@@ -60,22 +60,6 @@ asmlinkage int old_mmap(struct mmap_arg_struct *arg)
 	return error;
 }
 
-struct sel_arg_struct {
-	unsigned long n;
-	fd_set *inp, *outp, *exp;
-	struct timeval *tvp;
-};
-
-asmlinkage int old_select(struct sel_arg_struct *arg)
-{
-	struct sel_arg_struct a;
-
-	if (copy_from_user(&a, arg, sizeof(a)))
-		return -EFAULT;
-	/* sys_select() does the appropriate kernel locking */
-	return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
-}
-
 /*
  * sys_ipc() is the de-multiplexer for the SysV IPC calls..
  *

diff --git a/arch/h8300/kernel/syscalls.S b/arch/h8300/kernel/syscalls.S
@@ -96,7 +96,7 @@ SYMBOL_NAME_LABEL(sys_call_table)
 	.long SYMBOL_NAME(sys_settimeofday)
 	.long SYMBOL_NAME(sys_getgroups16)	/* 80 */
 	.long SYMBOL_NAME(sys_setgroups16)
-	.long SYMBOL_NAME(old_select)
+	.long SYMBOL_NAME(sys_old_select)
 	.long SYMBOL_NAME(sys_symlink)
 	.long SYMBOL_NAME(sys_lstat)
 	.long SYMBOL_NAME(sys_readlink)		/* 85 */

diff --git a/arch/m68k/include/asm/unistd.h b/arch/m68k/include/asm/unistd.h
@@ -363,6 +363,7 @@
 #define __ARCH_WANT_SYS_LLSEEK
 #define __ARCH_WANT_SYS_NICE
 #define __ARCH_WANT_SYS_OLD_GETRLIMIT
+#define __ARCH_WANT_SYS_OLD_SELECT
 #define __ARCH_WANT_SYS_OLDUMOUNT
 #define __ARCH_WANT_SYS_SIGPENDING
 #define __ARCH_WANT_SYS_SIGPROCMASK

diff --git a/arch/m68k/kernel/entry.S b/arch/m68k/kernel/entry.S
@@ -510,7 +510,7 @@ sys_call_table:
 	.long sys_settimeofday
 	.long sys_getgroups16	/* 80 */
 	.long sys_setgroups16
-	.long old_select
+	.long sys_old_select
 	.long sys_symlink
 	.long sys_lstat
 	.long sys_readlink	/* 85 */

diff --git a/arch/m68k/kernel/sys_m68k.c b/arch/m68k/kernel/sys_m68k.c
@@ -80,22 +80,6 @@ asmlinkage int old_mmap(struct mmap_arg_struct __user *arg)
 	return error;
 }
 
-struct sel_arg_struct {
-	unsigned long n;
-	fd_set __user *inp, *outp, *exp;
-	struct timeval __user *tvp;
-};
-
-asmlinkage int old_select(struct sel_arg_struct __user *arg)
-{
-	struct sel_arg_struct a;
-
-	if (copy_from_user(&a, arg, sizeof(a)))
-		return -EFAULT;
-	/* sys_select() does the appropriate kernel locking */
-	return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
-}
-
 /*
  * sys_ipc() is the de-multiplexer for the SysV IPC calls..
  *

diff --git a/arch/m68knommu/kernel/sys_m68k.c b/arch/m68knommu/kernel/sys_m68k.c
@@ -61,22 +61,6 @@ asmlinkage int old_mmap(struct mmap_arg_struct *arg)
 	return error;
 }
 
-struct sel_arg_struct {
-	unsigned long n;
-	fd_set *inp, *outp, *exp;
-	struct timeval *tvp;
-};
-
-asmlinkage int old_select(struct sel_arg_struct *arg)
-{
-	struct sel_arg_struct a;
-
-	if (copy_from_user(&a, arg, sizeof(a)))
-		return -EFAULT;
-	/* sys_select() does the appropriate kernel locking */
-	return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
-}
-
 /*
  * sys_ipc() is the de-multiplexer for the SysV IPC calls..
  *

diff --git a/arch/m68knommu/kernel/syscalltable.S b/arch/m68knommu/kernel/syscalltable.S
@@ -100,7 +100,7 @@ ENTRY(sys_call_table)
 	.long sys_settimeofday
 	.long sys_getgroups16	/* 80 */
 	.long sys_setgroups16
-	.long old_select
+	.long sys_old_select
 	.long sys_symlink
 	.long sys_lstat
 	.long sys_readlink	/* 85 */

diff --git a/arch/mn10300/include/asm/unistd.h b/arch/mn10300/include/asm/unistd.h
@@ -375,6 +375,7 @@
 #define __ARCH_WANT_SYS_LLSEEK
 #define __ARCH_WANT_SYS_NICE
 #define __ARCH_WANT_SYS_OLD_GETRLIMIT
+#define __ARCH_WANT_SYS_OLD_SELECT
 #define __ARCH_WANT_SYS_OLDUMOUNT
 #define __ARCH_WANT_SYS_SIGPENDING
 #define __ARCH_WANT_SYS_SIGPROCMASK

diff --git a/arch/mn10300/kernel/entry.S b/arch/mn10300/kernel/entry.S
@@ -468,7 +468,7 @@ ENTRY(sys_call_table)
 	.long sys_settimeofday
 	.long sys_getgroups16	/* 80 */
 	.long sys_setgroups16
-	.long old_select
+	.long sys_old_select
 	.long sys_symlink
 	.long sys_lstat
 	.long sys_readlink	/* 85 */

diff --git a/arch/mn10300/kernel/sys_mn10300.c b/arch/mn10300/kernel/sys_mn10300.c
@@ -32,24 +32,6 @@ asmlinkage long old_mmap(unsigned long addr, unsigned long len,
 	return sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
 }
 
-struct sel_arg_struct {
-	unsigned long n;
-	fd_set *inp;
-	fd_set *outp;
-	fd_set *exp;
-	struct timeval *tvp;
-};
-
-asmlinkage int old_select(struct sel_arg_struct __user *arg)
-{
-	struct sel_arg_struct a;
-
-	if (copy_from_user(&a, arg, sizeof(a)))
-		return -EFAULT;
-	/* sys_select() does the appropriate kernel locking */
-	return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
-}
-
 /*
  * sys_ipc() is the de-multiplexer for the SysV IPC calls..
  *

diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
@@ -28,7 +28,6 @@ struct new_utsname;
 struct mmap_arg_struct;
 struct fadvise64_64_args;
 struct old_sigaction;
-struct sel_arg_struct;
 
 long sys_mmap2(struct mmap_arg_struct __user  *arg);
 long sys_s390_old_mmap(struct mmap_arg_struct __user *arg);

diff --git a/arch/um/sys-i386/syscalls.c b/arch/um/sys-i386/syscalls.c
@@ -44,24 +44,6 @@ long old_mmap_i386(struct mmap_arg_struct __user *arg)
 	return err;
 }
 
-struct sel_arg_struct {
-	unsigned long n;
-	fd_set __user *inp;
-	fd_set __user *outp;
-	fd_set __user *exp;
-	struct timeval __user *tvp;
-};
-
-long old_select(struct sel_arg_struct __user *arg)
-{
-	struct sel_arg_struct a;
-
-	if (copy_from_user(&a, arg, sizeof(a)))
-		return -EFAULT;
-	/* sys_select() does the appropriate kernel locking */
-	return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
-}
-
 /*
  * The prototype on i386 is:
  *

diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S
@@ -586,7 +586,7 @@ ia32_sys_call_table:
 	.quad compat_sys_settimeofday
 	.quad sys_getgroups16	/* 80 */
 	.quad sys_setgroups16
-	.quad sys32_old_select
+	.quad compat_sys_old_select
 	.quad sys_symlink
 	.quad sys_lstat
 	.quad sys_readlink		/* 85 */

diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
@@ -332,24 +332,6 @@ asmlinkage long sys32_alarm(unsigned int seconds)
 	return alarm_setitimer(seconds);
 }
 
-struct sel_arg_struct {
-	unsigned int n;
-	unsigned int inp;
-	unsigned int outp;
-	unsigned int exp;
-	unsigned int tvp;
-};
-
-asmlinkage long sys32_old_select(struct sel_arg_struct __user *arg)
-{
-	struct sel_arg_struct a;
-
-	if (copy_from_user(&a, arg, sizeof(a)))
-		return -EFAULT;
-	return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
-				 compat_ptr(a.exp), compat_ptr(a.tvp));
-}
-
 asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr,
 			      int options)
 {

diff --git a/arch/x86/include/asm/sys_ia32.h b/arch/x86/include/asm/sys_ia32.h
@@ -40,8 +40,6 @@ asmlinkage long sys32_rt_sigprocmask(int, compat_sigset_t __user *,
 				     compat_sigset_t __user *, unsigned int);
 asmlinkage long sys32_alarm(unsigned int);
 
-struct sel_arg_struct;
-asmlinkage long sys32_old_select(struct sel_arg_struct __user *);
 asmlinkage long sys32_waitpid(compat_pid_t, unsigned int *, int);
 asmlinkage long sys32_sysfs(int, u32, u32);
 

diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h
@@ -52,12 +52,10 @@ unsigned long sys_sigreturn(struct pt_regs *);
 
 /* kernel/sys_i386_32.c */
 struct mmap_arg_struct;
-struct sel_arg_struct;
 struct oldold_utsname;
 struct old_utsname;
 
 asmlinkage int old_mmap(struct mmap_arg_struct __user *);
-asmlinkage int old_select(struct sel_arg_struct __user *);
 asmlinkage int sys_ipc(uint, int, int, int, void __user *, long);
 asmlinkage int sys_uname(struct old_utsname __user *);
 asmlinkage int sys_olduname(struct oldold_utsname __user *);

diff --git a/arch/x86/include/asm/unistd_32.h b/arch/x86/include/asm/unistd_32.h
@@ -366,6 +366,7 @@
 #define __ARCH_WANT_SYS_LLSEEK
 #define __ARCH_WANT_SYS_NICE
 #define __ARCH_WANT_SYS_OLD_GETRLIMIT
+#define __ARCH_WANT_SYS_OLD_SELECT
 #define __ARCH_WANT_SYS_OLDUMOUNT
 #define __ARCH_WANT_SYS_SIGPENDING
 #define __ARCH_WANT_SYS_SIGPROCMASK

diff --git a/arch/x86/kernel/sys_i386_32.c b/arch/x86/kernel/sys_i386_32.c
@@ -58,23 +58,6 @@ asmlinkage int old_mmap(struct mmap_arg_struct __user *arg)
 	return err;
 }
 
-
-struct sel_arg_struct {
-	unsigned long n;
-	fd_set __user *inp, *outp, *exp;
-	struct timeval __user *tvp;
-};
-
-asmlinkage int old_select(struct sel_arg_struct __user *arg)
-{
-	struct sel_arg_struct a;
-
-	if (copy_from_user(&a, arg, sizeof(a)))
-		return -EFAULT;
-	/* sys_select() does the appropriate kernel locking */
-	return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
-}
-
 /*
  * sys_ipc() is the de-multiplexer for the SysV IPC calls..
  *

diff --git a/arch/x86/kernel/syscall_table_32.S b/arch/x86/kernel/syscall_table_32.S
@@ -81,7 +81,7 @@ ENTRY(sys_call_table)
 	.long sys_settimeofday
 	.long sys_getgroups16	/* 80 */
 	.long sys_setgroups16
-	.long old_select
+	.long sys_old_select
 	.long sys_symlink
 	.long sys_lstat
 	.long sys_readlink	/* 85 */

diff --git a/fs/compat.c b/fs/compat.c
@@ -1795,6 +1795,24 @@ asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
 	return ret;
 }
 
+struct compat_sel_arg_struct {
+	compat_ulong_t n;
+	compat_uptr_t inp;
+	compat_uptr_t outp;
+	compat_uptr_t exp;
+	compat_uptr_t tvp;
+};
+
+asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg)
+{
+	struct compat_sel_arg_struct a;
+
+	if (copy_from_user(&a, arg, sizeof(a)))
+		return -EFAULT;
+	return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
+				 compat_ptr(a.exp), compat_ptr(a.tvp));
+}
+
 #ifdef HAVE_SET_RESTORE_SIGMASK
 static long do_compat_pselect(int n, compat_ulong_t __user *inp,
 	compat_ulong_t __user *outp, compat_ulong_t __user *exp,

diff --git a/fs/select.c b/fs/select.c
@@ -691,6 +691,23 @@ SYSCALL_DEFINE6(pselect6, int, n, fd_set __user *, inp, fd_set __user *, outp,
 }
 #endif /* HAVE_SET_RESTORE_SIGMASK */
 
+#ifdef __ARCH_WANT_SYS_OLD_SELECT
+struct sel_arg_struct {
+	unsigned long n;
+	fd_set __user *inp, *outp, *exp;
+	struct timeval __user *tvp;
+};
+
+SYSCALL_DEFINE1(old_select, struct sel_arg_struct __user *, arg)
+{
+	struct sel_arg_struct a;
+
+	if (copy_from_user(&a, arg, sizeof(a)))
+		return -EFAULT;
+	return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
+}
+#endif
+
 struct poll_list {
 	struct poll_list *next;
 	int len;

diff --git a/include/linux/compat.h b/include/linux/compat.h
@@ -23,6 +23,7 @@
 typedef __compat_uid32_t	compat_uid_t;
 typedef __compat_gid32_t	compat_gid_t;
 
+struct compat_sel_arg_struct;
 struct rusage;
 
 struct compat_itimerspec { 
@@ -249,6 +250,8 @@ asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
 		compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 		struct compat_timeval __user *tvp);
 
+asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
+
 asmlinkage long compat_sys_wait4(compat_pid_t pid,
 				 compat_uint_t __user *stat_addr, int options,
 				 struct compat_rusage __user *ru);