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Diffstat (limited to 'arch/um/sys-x86_64/syscalls.c')
-rw-r--r--arch/um/sys-x86_64/syscalls.c66
1 files changed, 32 insertions, 34 deletions
diff --git a/arch/um/sys-x86_64/syscalls.c b/arch/um/sys-x86_64/syscalls.c
index bbcab773b23d..58ae06562b4a 100644
--- a/arch/um/sys-x86_64/syscalls.c
+++ b/arch/um/sys-x86_64/syscalls.c
@@ -1,36 +1,34 @@
/*
+ * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Copyright 2003 PathScale, Inc.
*
* Licensed under the GPL
*/
#include "linux/linkage.h"
-#include "linux/slab.h"
-#include "linux/shm.h"
-#include "linux/utsname.h"
#include "linux/personality.h"
-#include "asm/uaccess.h"
-#define __FRAME_OFFSETS
-#include "asm/ptrace.h"
-#include "asm/unistd.h"
+#include "linux/utsname.h"
#include "asm/prctl.h" /* XXX This should get the constants from libc */
-#include "kern.h"
+#include "asm/uaccess.h"
#include "os.h"
asmlinkage long sys_uname64(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;
}
long arch_prctl(struct task_struct *task, int code, unsigned long __user *addr)
{
- unsigned long *ptr = addr, tmp;
+ unsigned long *ptr = addr, tmp;
long ret;
int pid = task->mm->context.skas.id.u.pid;
@@ -47,42 +45,42 @@ long arch_prctl(struct task_struct *task, int code, unsigned long __user *addr)
* arch_prctl is run on the host, then the registers are read
* back.
*/
- switch(code){
+ switch (code) {
case ARCH_SET_FS:
case ARCH_SET_GS:
- restore_registers(pid, &current->thread.regs.regs);
- break;
- case ARCH_GET_FS:
- case ARCH_GET_GS:
- /*
- * With these two, we read to a local pointer and
- * put_user it to the userspace pointer that we were
- * given. If addr isn't valid (because it hasn't been
- * faulted in or is just bogus), we want put_user to
- * fault it in (or return -EFAULT) instead of having
- * the host return -EFAULT.
- */
- ptr = &tmp;
- }
+ restore_registers(pid, &current->thread.regs.regs);
+ break;
+ case ARCH_GET_FS:
+ case ARCH_GET_GS:
+ /*
+ * With these two, we read to a local pointer and
+ * put_user it to the userspace pointer that we were
+ * given. If addr isn't valid (because it hasn't been
+ * faulted in or is just bogus), we want put_user to
+ * fault it in (or return -EFAULT) instead of having
+ * the host return -EFAULT.
+ */
+ ptr = &tmp;
+ }
- ret = os_arch_prctl(pid, code, ptr);
- if(ret)
- return ret;
+ ret = os_arch_prctl(pid, code, ptr);
+ if (ret)
+ return ret;
- switch(code){
+ switch (code) {
case ARCH_SET_FS:
current->thread.arch.fs = (unsigned long) ptr;
save_registers(pid, &current->thread.regs.regs);
break;
case ARCH_SET_GS:
- save_registers(pid, &current->thread.regs.regs);
+ save_registers(pid, &current->thread.regs.regs);
break;
case ARCH_GET_FS:
ret = put_user(tmp, addr);
- break;
+ break;
case ARCH_GET_GS:
ret = put_user(tmp, addr);
- break;
+ break;
}
return ret;
@@ -109,8 +107,8 @@ long sys_clone(unsigned long clone_flags, unsigned long newsp,
void arch_switch_to(struct task_struct *from, struct task_struct *to)
{
- if((to->thread.arch.fs == 0) || (to->mm == NULL))
- return;
+ if ((to->thread.arch.fs == 0) || (to->mm == NULL))
+ return;
- arch_prctl(to, ARCH_SET_FS, (void __user *) to->thread.arch.fs);
+ arch_prctl(to, ARCH_SET_FS, (void __user *) to->thread.arch.fs);
}