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| author | Christoph Hellwig <hch@lst.de> | 2010-03-10 15:21:19 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-12 15:52:32 -0800 |
| commit | e28cbf22933d0c0ccaf3c4c27a1a263b41f73859 (patch) | |
| tree | a93ff48cfd97766a23b2c4f3ea86fccfc9c51d3f /arch/x86 | |
| parent | baed7fc9b580bd3fb8252ff1d9b36eaf1f86b670 (diff) | |
| download | linux-e28cbf22933d0c0ccaf3c4c27a1a263b41f73859.tar.gz linux-e28cbf22933d0c0ccaf3c4c27a1a263b41f73859.tar.bz2 linux-e28cbf22933d0c0ccaf3c4c27a1a263b41f73859.zip | |
improve sys_newuname() for compat architectures
On an architecture that supports 32-bit compat we need to override the
reported machine in uname with the 32-bit value. Instead of doing this
separately in every architecture introduce a COMPAT_UTS_MACHINE define in
<asm/compat.h> and apply it directly in sys_newuname().
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>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/compat.h | 3 | ||||
| -rw-r--r-- | arch/x86/include/asm/syscalls.h | 3 | ||||
| -rw-r--r-- | arch/x86/include/asm/unistd_64.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/sys_x86_64.c | 12 |
4 files changed, 3 insertions, 17 deletions
diff --git a/arch/x86/include/asm/compat.h b/arch/x86/include/asm/compat.h index 9a9c7bdc923d..306160e58b48 100644 --- a/arch/x86/include/asm/compat.h +++ b/arch/x86/include/asm/compat.h @@ -8,7 +8,8 @@ #include <linux/sched.h> #include <asm/user32.h> -#define COMPAT_USER_HZ 100 +#define COMPAT_USER_HZ 100 +#define COMPAT_UTS_MACHINE "i686\0\0" typedef u32 compat_size_t; typedef s32 compat_ssize_t; diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h index 50f6a569f0d1..47cd606c3537 100644 --- a/arch/x86/include/asm/syscalls.h +++ b/arch/x86/include/asm/syscalls.h @@ -68,11 +68,8 @@ int sys_vm86(unsigned long, unsigned long, struct pt_regs *); long sys_arch_prctl(int, unsigned long); /* kernel/sys_x86_64.c */ -struct new_utsname; - asmlinkage long sys_mmap(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long); -asmlinkage long sys_uname(struct new_utsname __user *); #endif /* CONFIG_X86_32 */ #endif /* _ASM_X86_SYSCALLS_H */ diff --git a/arch/x86/include/asm/unistd_64.h b/arch/x86/include/asm/unistd_64.h index 4843f7ba754a..83e2d6dc5038 100644 --- a/arch/x86/include/asm/unistd_64.h +++ b/arch/x86/include/asm/unistd_64.h @@ -146,7 +146,7 @@ __SYSCALL(__NR_wait4, sys_wait4) #define __NR_kill 62 __SYSCALL(__NR_kill, sys_kill) #define __NR_uname 63 -__SYSCALL(__NR_uname, sys_uname) +__SYSCALL(__NR_uname, sys_newuname) #define __NR_semget 64 __SYSCALL(__NR_semget, sys_semget) diff --git a/arch/x86/kernel/sys_x86_64.c b/arch/x86/kernel/sys_x86_64.c index 8aa2057efd12..ff14a5044ce6 100644 --- a/arch/x86/kernel/sys_x86_64.c +++ b/arch/x86/kernel/sys_x86_64.c @@ -209,15 +209,3 @@ bottomup: return addr; } - - -SYSCALL_DEFINE1(uname, struct new_utsname __user *, name) -{ - int err; - 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; -} |