Add generic sys_olduname()

Add generic implementations of the old and really old uname system calls.
Note that sh only implements sys_olduname but not sys_oldolduname, but I'm
not going to bother with another ifdef for that special case.

m32r implemented an old uname but never wired it up, so kill it, too.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: James Morris <jmorris@namei.org>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2010-03-10 15:21:21 -08:00 committed by Linus Torvalds
parent e28cbf2293
commit 5cacdb4add
19 changed files with 66 additions and 284 deletions

View file

@ -76,17 +76,6 @@ asmlinkage int sys_tas(int __user *addr)
return oldval;
}
asmlinkage int sys_uname(struct old_utsname __user * name)
{
int err;
if (!name)
return -EFAULT;
down_read(&uts_sem);
err = copy_to_user(name, utsname(), sizeof (*name));
up_read(&uts_sem);
return err?-EFAULT:0;
}
asmlinkage int sys_cacheflush(void *addr, int bytes, int cache)
{
/* This should flush more selectively ... */

View file

@ -1014,6 +1014,7 @@
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_OLD_GETRLIMIT
#define __ARCH_WANT_SYS_OLD_UNAME
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK

View file

@ -215,48 +215,6 @@ asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs)
return error;
}
/*
* Compacrapability ...
*/
SYSCALL_DEFINE1(uname, struct old_utsname __user *, name)
{
if (name && !copy_to_user(name, utsname(), sizeof (*name)))
return 0;
return -EFAULT;
}
/*
* Compacrapability ...
*/
SYSCALL_DEFINE1(olduname, struct oldold_utsname __user *, name)
{
int error;
if (!name)
return -EFAULT;
if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
return -EFAULT;
error = __copy_to_user(&name->sysname, &utsname()->sysname,
__OLD_UTS_LEN);
error -= __put_user(0, name->sysname + __OLD_UTS_LEN);
error -= __copy_to_user(&name->nodename, &utsname()->nodename,
__OLD_UTS_LEN);
error -= __put_user(0, name->nodename + __OLD_UTS_LEN);
error -= __copy_to_user(&name->release, &utsname()->release,
__OLD_UTS_LEN);
error -= __put_user(0, name->release + __OLD_UTS_LEN);
error -= __copy_to_user(&name->version, &utsname()->version,
__OLD_UTS_LEN);
error -= __put_user(0, name->version + __OLD_UTS_LEN);
error -= __copy_to_user(&name->machine, &utsname()->machine,
__OLD_UTS_LEN);
error = __put_user(0, name->machine + __OLD_UTS_LEN);
error = error ? -EFAULT : 0;
return error;
}
SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
{
struct thread_info *ti = task_thread_info(current);

View file

@ -377,6 +377,7 @@
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_OLD_GETRLIMIT
#define __ARCH_WANT_SYS_OLD_UNAME
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK

View file

@ -116,63 +116,6 @@ long ppc64_personality(unsigned long personality)
}
#endif
#ifdef CONFIG_PPC64
#define OVERRIDE_MACHINE (personality(current->personality) == PER_LINUX32)
#else
#define OVERRIDE_MACHINE 0
#endif
static inline int override_machine(char __user *mach)
{
if (OVERRIDE_MACHINE) {
/* change ppc64 to ppc */
if (__put_user(0, mach+3) || __put_user(0, mach+4))
return -EFAULT;
}
return 0;
}
int sys_uname(struct old_utsname __user *name)
{
int err = 0;
down_read(&uts_sem);
if (copy_to_user(name, utsname(), sizeof(*name)))
err = -EFAULT;
up_read(&uts_sem);
if (!err)
err = override_machine(name->machine);
return err;
}
int sys_olduname(struct oldold_utsname __user *name)
{
int error;
if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
return -EFAULT;
down_read(&uts_sem);
error = __copy_to_user(&name->sysname, &utsname()->sysname,
__OLD_UTS_LEN);
error |= __put_user(0, name->sysname + __OLD_UTS_LEN);
error |= __copy_to_user(&name->nodename, &utsname()->nodename,
__OLD_UTS_LEN);
error |= __put_user(0, name->nodename + __OLD_UTS_LEN);
error |= __copy_to_user(&name->release, &utsname()->release,
__OLD_UTS_LEN);
error |= __put_user(0, name->release + __OLD_UTS_LEN);
error |= __copy_to_user(&name->version, &utsname()->version,
__OLD_UTS_LEN);
error |= __put_user(0, name->version + __OLD_UTS_LEN);
error |= __copy_to_user(&name->machine, &utsname()->machine,
__OLD_UTS_LEN);
error |= override_machine(name->machine);
up_read(&uts_sem);
return error? -EFAULT: 0;
}
long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
u32 len_high, u32 len_low)
{

View file

@ -3,15 +3,12 @@
#ifdef __KERNEL__
struct old_utsname;
asmlinkage int old_mmap(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
int fd, unsigned long off);
asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff);
asmlinkage int sys_uname(struct old_utsname __user *name);
#ifdef CONFIG_SUPERH32
# include "syscalls_32.h"

View file

@ -371,6 +371,7 @@
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_OLD_GETRLIMIT
#define __ARCH_WANT_SYS_OLD_UNAME
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK

View file

@ -411,6 +411,7 @@
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_OLD_GETRLIMIT
#define __ARCH_WANT_SYS_OLD_UNAME
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK

View file

@ -93,14 +93,3 @@ asmlinkage int sys_cacheflush(unsigned long addr, unsigned long len, int op)
up_read(&current->mm->mmap_sem);
return 0;
}
asmlinkage int sys_uname(struct old_utsname __user *name)
{
int err;
if (!name)
return -EFAULT;
down_read(&uts_sem);
err = copy_to_user(name, utsname(), sizeof(*name));
up_read(&uts_sem);
return err?-EFAULT:0;
}

View file

@ -51,51 +51,6 @@ long old_mmap(unsigned long addr, unsigned long len,
return err;
}
long sys_uname(struct old_utsname __user * name)
{
long err;
if (!name)
return -EFAULT;
down_read(&uts_sem);
err = copy_to_user(name, utsname(), sizeof (*name));
up_read(&uts_sem);
return err?-EFAULT:0;
}
long sys_olduname(struct oldold_utsname __user * name)
{
long error;
if (!name)
return -EFAULT;
if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
return -EFAULT;
down_read(&uts_sem);
error = __copy_to_user(&name->sysname, &utsname()->sysname,
__OLD_UTS_LEN);
error |= __put_user(0, name->sysname + __OLD_UTS_LEN);
error |= __copy_to_user(&name->nodename, &utsname()->nodename,
__OLD_UTS_LEN);
error |= __put_user(0, name->nodename + __OLD_UTS_LEN);
error |= __copy_to_user(&name->release, &utsname()->release,
__OLD_UTS_LEN);
error |= __put_user(0, name->release + __OLD_UTS_LEN);
error |= __copy_to_user(&name->version, &utsname()->version,
__OLD_UTS_LEN);
error |= __put_user(0, name->version + __OLD_UTS_LEN);
error |= __copy_to_user(&name->machine, &utsname()->machine,
__OLD_UTS_LEN);
error |= __put_user(0, name->machine + __OLD_UTS_LEN);
up_read(&uts_sem);
error = error ? -EFAULT : 0;
return error;
}
int kernel_execve(const char *filename, char *const argv[], char *const envp[])
{
mm_segment_t fs;

View file

@ -563,7 +563,7 @@ ia32_sys_call_table:
.quad quiet_ni_syscall /* old mpx syscall holder */
.quad sys_setpgid
.quad quiet_ni_syscall /* old ulimit syscall holder */
.quad sys32_olduname
.quad sys_olduname
.quad sys_umask /* 60 */
.quad sys_chroot
.quad compat_sys_ustat
@ -613,7 +613,7 @@ ia32_sys_call_table:
.quad compat_sys_newstat
.quad compat_sys_newlstat
.quad compat_sys_newfstat
.quad sys32_uname
.quad sys_uname
.quad stub32_iopl /* 110 */
.quad sys_vhangup
.quad quiet_ni_syscall /* old "idle" system call */

View file

@ -448,58 +448,6 @@ asmlinkage long sys32_sendfile(int out_fd, int in_fd,
return ret;
}
asmlinkage long sys32_olduname(struct oldold_utsname __user *name)
{
char *arch = "x86_64";
int err;
if (!name)
return -EFAULT;
if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
return -EFAULT;
down_read(&uts_sem);
err = __copy_to_user(&name->sysname, &utsname()->sysname,
__OLD_UTS_LEN);
err |= __put_user(0, name->sysname+__OLD_UTS_LEN);
err |= __copy_to_user(&name->nodename, &utsname()->nodename,
__OLD_UTS_LEN);
err |= __put_user(0, name->nodename+__OLD_UTS_LEN);
err |= __copy_to_user(&name->release, &utsname()->release,
__OLD_UTS_LEN);
err |= __put_user(0, name->release+__OLD_UTS_LEN);
err |= __copy_to_user(&name->version, &utsname()->version,
__OLD_UTS_LEN);
err |= __put_user(0, name->version+__OLD_UTS_LEN);
if (personality(current->personality) == PER_LINUX32)
arch = "i686";
err |= __copy_to_user(&name->machine, arch, strlen(arch) + 1);
up_read(&uts_sem);
err = err ? -EFAULT : 0;
return err;
}
long sys32_uname(struct old_utsname __user *name)
{
int err;
if (!name)
return -EFAULT;
down_read(&uts_sem);
err = copy_to_user(name, utsname(), sizeof(*name));
up_read(&uts_sem);
if (personality(current->personality) == PER_LINUX32)
err |= copy_to_user(&name->machine, "i686", 5);
return err ? -EFAULT : 0;
}
asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,
compat_uptr_t __user *envp, struct pt_regs *regs)
{

View file

@ -54,11 +54,6 @@ asmlinkage long sys32_pwrite(unsigned int, char __user *, u32, u32, u32);
asmlinkage long sys32_personality(unsigned long);
asmlinkage long sys32_sendfile(int, int, compat_off_t __user *, s32);
struct oldold_utsname;
struct old_utsname;
asmlinkage long sys32_olduname(struct oldold_utsname __user *);
long sys32_uname(struct old_utsname __user *);
asmlinkage long sys32_execve(char __user *, compat_uptr_t __user *,
compat_uptr_t __user *, struct pt_regs *);
asmlinkage long sys32_clone(unsigned int, unsigned int, struct pt_regs *);

View file

@ -50,13 +50,6 @@ asmlinkage int sys_sigaction(int, const struct old_sigaction __user *,
struct old_sigaction __user *);
unsigned long sys_sigreturn(struct pt_regs *);
/* kernel/sys_i386_32.c */
struct oldold_utsname;
struct old_utsname;
asmlinkage int sys_uname(struct old_utsname __user *);
asmlinkage int sys_olduname(struct oldold_utsname __user *);
/* kernel/vm86_32.c */
int sys_vm86old(struct vm86_struct __user *, struct pt_regs *);
int sys_vm86(unsigned long, unsigned long, struct pt_regs *);

View file

@ -367,6 +367,7 @@
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_OLD_GETRLIMIT
#define __ARCH_WANT_SYS_OLD_UNAME
#define __ARCH_WANT_SYS_OLD_MMAP
#define __ARCH_WANT_SYS_OLD_SELECT
#define __ARCH_WANT_SYS_OLDUMOUNT

View file

@ -680,6 +680,7 @@ __SYSCALL(__NR_recvmmsg, sys_recvmmsg)
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_OLD_GETRLIMIT
#define __ARCH_WANT_SYS_OLD_UNAME
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK

View file

@ -24,55 +24,6 @@
#include <asm/syscalls.h>
/*
* Old cruft
*/
asmlinkage int sys_uname(struct old_utsname __user *name)
{
int err;
if (!name)
return -EFAULT;
down_read(&uts_sem);
err = copy_to_user(name, utsname(), sizeof(*name));
up_read(&uts_sem);
return err? -EFAULT:0;
}
asmlinkage int sys_olduname(struct oldold_utsname __user *name)
{
int error;
if (!name)
return -EFAULT;
if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
return -EFAULT;
down_read(&uts_sem);
error = __copy_to_user(&name->sysname, &utsname()->sysname,
__OLD_UTS_LEN);
error |= __put_user(0, name->sysname + __OLD_UTS_LEN);
error |= __copy_to_user(&name->nodename, &utsname()->nodename,
__OLD_UTS_LEN);
error |= __put_user(0, name->nodename + __OLD_UTS_LEN);
error |= __copy_to_user(&name->release, &utsname()->release,
__OLD_UTS_LEN);
error |= __put_user(0, name->release + __OLD_UTS_LEN);
error |= __copy_to_user(&name->version, &utsname()->version,
__OLD_UTS_LEN);
error |= __put_user(0, name->version + __OLD_UTS_LEN);
error |= __copy_to_user(&name->machine, &utsname()->machine,
__OLD_UTS_LEN);
error |= __put_user(0, name->machine + __OLD_UTS_LEN);
up_read(&uts_sem);
error = error ? -EFAULT : 0;
return error;
}
/*
* Do a system call from kernel instead of calling sys_execve so we
* end up with proper pt_regs.

View file

@ -31,6 +31,8 @@ struct msqid_ds;
struct new_utsname;
struct nfsctl_arg;
struct __old_kernel_stat;
struct oldold_utsname;
struct old_utsname;
struct pollfd;
struct rlimit;
struct rusage;
@ -655,6 +657,8 @@ asmlinkage long sys_gethostname(char __user *name, int len);
asmlinkage long sys_sethostname(char __user *name, int len);
asmlinkage long sys_setdomainname(char __user *name, int len);
asmlinkage long sys_newuname(struct new_utsname __user *name);
asmlinkage long sys_uname(struct old_utsname __user *);
asmlinkage long sys_olduname(struct oldold_utsname __user *);
asmlinkage long sys_getrlimit(unsigned int resource,
struct rlimit __user *rlim);

View file

@ -1138,6 +1138,60 @@ SYSCALL_DEFINE1(newuname, struct new_utsname __user *, name)
return errno;
}
#ifdef __ARCH_WANT_SYS_OLD_UNAME
/*
* Old cruft
*/
SYSCALL_DEFINE1(uname, struct old_utsname __user *, name)
{
int error = 0;
if (!name)
return -EFAULT;
down_read(&uts_sem);
if (copy_to_user(name, utsname(), sizeof(*name)))
error = -EFAULT;
up_read(&uts_sem);
if (!error && override_architecture(name))
error = -EFAULT;
return error;
}
SYSCALL_DEFINE1(olduname, struct oldold_utsname __user *, name)
{
int error;
if (!name)
return -EFAULT;
if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
return -EFAULT;
down_read(&uts_sem);
error = __copy_to_user(&name->sysname, &utsname()->sysname,
__OLD_UTS_LEN);
error |= __put_user(0, name->sysname + __OLD_UTS_LEN);
error |= __copy_to_user(&name->nodename, &utsname()->nodename,
__OLD_UTS_LEN);
error |= __put_user(0, name->nodename + __OLD_UTS_LEN);
error |= __copy_to_user(&name->release, &utsname()->release,
__OLD_UTS_LEN);
error |= __put_user(0, name->release + __OLD_UTS_LEN);
error |= __copy_to_user(&name->version, &utsname()->version,
__OLD_UTS_LEN);
error |= __put_user(0, name->version + __OLD_UTS_LEN);
error |= __copy_to_user(&name->machine, &utsname()->machine,
__OLD_UTS_LEN);
error |= __put_user(0, name->machine + __OLD_UTS_LEN);
up_read(&uts_sem);
if (!error && override_architecture(name))
error = -EFAULT;
return error ? -EFAULT : 0;
}
#endif
SYSCALL_DEFINE2(sethostname, char __user *, name, int, len)
{
int errno;