regs->rsp = (u32)regs->rsp;
/* Restore EAX (clobbered by hypercall). */
- if ( unlikely(__get_user(regs->eax, (u32 *)regs->rsp)) )
+ if ( unlikely(__get_guest(regs->eax, (u32 *)regs->rsp)) )
{
domain_crash(v->domain);
return 0;
}
/* Restore CS and EIP. */
- if ( unlikely(__get_user(regs->eip, (u32 *)regs->rsp + 1)) ||
- unlikely(__get_user(regs->cs, (u32 *)regs->rsp + 2)) )
+ if ( unlikely(__get_guest(regs->eip, (u32 *)regs->rsp + 1)) ||
+ unlikely(__get_guest(regs->cs, (u32 *)regs->rsp + 2)) )
{
domain_crash(v->domain);
return 0;
* Fix up and restore EFLAGS. We fix up in a local staging area
* to avoid firing the BUG_ON(IOPL) check in arch_get_info_guest.
*/
- if ( unlikely(__get_user(eflags, (u32 *)regs->rsp + 3)) )
+ if ( unlikely(__get_guest(eflags, (u32 *)regs->rsp + 3)) )
{
domain_crash(v->domain);
return 0;
{
for (i = 1; i < 10; ++i)
{
- rc |= __get_user(x, (u32 *)regs->rsp + i);
- rc |= __put_user(x, (u32 *)(unsigned long)ksp + i);
+ rc |= __get_guest(x, (u32 *)regs->rsp + i);
+ rc |= __put_guest(x, (u32 *)(unsigned long)ksp + i);
}
}
else if ( ksp > regs->esp )
{
for ( i = 9; i > 0; --i )
{
- rc |= __get_user(x, (u32 *)regs->rsp + i);
- rc |= __put_user(x, (u32 *)(unsigned long)ksp + i);
+ rc |= __get_guest(x, (u32 *)regs->rsp + i);
+ rc |= __put_guest(x, (u32 *)(unsigned long)ksp + i);
}
}
if ( rc )
eflags &= ~X86_EFLAGS_IF;
regs->eflags &= ~(X86_EFLAGS_VM|X86_EFLAGS_RF|
X86_EFLAGS_NT|X86_EFLAGS_TF);
- if ( unlikely(__put_user(0, (u32 *)regs->rsp)) )
+ if ( unlikely(__put_guest(0, (u32 *)regs->rsp)) )
{
domain_crash(v->domain);
return 0;
else if ( ring_1(regs) )
regs->esp += 16;
/* Return to ring 2/3: restore ESP and SS. */
- else if ( __get_user(regs->ss, (u32 *)regs->rsp + 5) ||
- __get_user(regs->esp, (u32 *)regs->rsp + 4) )
+ else if ( __get_guest(regs->ss, (u32 *)regs->rsp + 5) ||
+ __get_guest(regs->esp, (u32 *)regs->rsp + 4) )
{
domain_crash(v->domain);
return 0;
__put_user_check((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
/**
- * __get_user: - Get a simple variable from user space, with less checking.
+ * __get_guest: - Get a simple variable from guest space, with less checking.
* @x: Variable to store result.
- * @ptr: Source address, in user space.
- *
- * Context: User context only. This function may sleep.
+ * @ptr: Source address, in guest space.
*
- * This macro copies a single simple variable from user space to kernel
+ * This macro copies a single simple variable from guest space to hypervisor
* space. It supports simple types like char and int, but not larger
* data types like structures or arrays.
*
* Returns zero on success, or -EFAULT on error.
* On error, the variable @x is set to zero.
*/
-#define __get_user(x,ptr) \
- __get_user_nocheck((x),(ptr),sizeof(*(ptr)))
+#define __get_guest(x, ptr) get_guest_nocheck(x, ptr, sizeof(*(ptr)))
+#define get_unsafe __get_guest
/**
- * __put_user: - Write a simple value into user space, with less checking.
- * @x: Value to copy to user space.
- * @ptr: Destination address, in user space.
+ * __put_guest: - Write a simple value into guest space, with less checking.
+ * @x: Value to store in guest space.
+ * @ptr: Destination address, in guest space.
*
- * Context: User context only. This function may sleep.
- *
- * This macro copies a single simple value from kernel space to user
+ * This macro copies a single simple value from hypervisor space to guest
* space. It supports simple types like char and int, but not larger
* data types like structures or arrays.
*
*
* Returns zero on success, or -EFAULT on error.
*/
-#define __put_user(x,ptr) \
- __put_user_nocheck((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
+#define __put_guest(x, ptr) \
+ put_guest_nocheck((__typeof__(*(ptr)))(x), ptr, sizeof(*(ptr)))
+#define put_unsafe __put_guest
-#define __put_user_nocheck(x, ptr, size) \
+#define put_guest_nocheck(x, ptr, size) \
({ \
int err_; \
- __put_user_size(x, ptr, size, err_, -EFAULT); \
+ put_guest_size(x, ptr, size, err_, -EFAULT); \
err_; \
})
({ \
__typeof__(*(ptr)) __user *ptr_ = (ptr); \
__typeof__(size) size_ = (size); \
- access_ok(ptr_, size_) ? __put_user_nocheck(x, ptr_, size_) \
+ access_ok(ptr_, size_) ? put_guest_nocheck(x, ptr_, size_) \
: -EFAULT; \
})
-#define __get_user_nocheck(x, ptr, size) \
+#define get_guest_nocheck(x, ptr, size) \
({ \
int err_; \
- __get_user_size(x, ptr, size, err_, -EFAULT); \
+ get_guest_size(x, ptr, size, err_, -EFAULT); \
err_; \
})
({ \
__typeof__(*(ptr)) __user *ptr_ = (ptr); \
__typeof__(size) size_ = (size); \
- access_ok(ptr_, size_) ? __get_user_nocheck(x, ptr_, size_) \
+ access_ok(ptr_, size_) ? get_guest_nocheck(x, ptr_, size_) \
: -EFAULT; \
})
* we do not write to any memory gcc knows about, so there are no
* aliasing issues.
*/
-#define __put_user_asm(x, addr, err, itype, rtype, ltype, errret) \
+#define put_unsafe_asm(x, addr, err, itype, rtype, ltype, errret) \
stac(); \
__asm__ __volatile__( \
"1: mov"itype" %"rtype"1,%2\n" \
: ltype (x), "m"(__m(addr)), "i"(errret), "0"(err)); \
clac()
-#define __get_user_asm(x, addr, err, itype, rtype, ltype, errret) \
+#define get_unsafe_asm(x, addr, err, itype, rtype, ltype, errret) \
stac(); \
__asm__ __volatile__( \
"1: mov"itype" %2,%"rtype"1\n" \
: "m"(__m(addr)), "i"(errret), "0"(err)); \
clac()
+#define put_unsafe_size(x, ptr, size, retval, errret) \
+do { \
+ retval = 0; \
+ switch ( size ) \
+ { \
+ case 1: put_unsafe_asm(x, ptr, retval, "b", "b", "iq", errret); break; \
+ case 2: put_unsafe_asm(x, ptr, retval, "w", "w", "ir", errret); break; \
+ case 4: put_unsafe_asm(x, ptr, retval, "l", "k", "ir", errret); break; \
+ case 8: put_unsafe_asm(x, ptr, retval, "q", "", "ir", errret); break; \
+ default: __put_user_bad(); \
+ } \
+} while ( false )
+#define put_guest_size put_unsafe_size
+
+#define get_unsafe_size(x, ptr, size, retval, errret) \
+do { \
+ retval = 0; \
+ switch ( size ) \
+ { \
+ case 1: get_unsafe_asm(x, ptr, retval, "b", "b", "=q", errret); break; \
+ case 2: get_unsafe_asm(x, ptr, retval, "w", "w", "=r", errret); break; \
+ case 4: get_unsafe_asm(x, ptr, retval, "l", "k", "=r", errret); break; \
+ case 8: get_unsafe_asm(x, ptr, retval, "q", "", "=r", errret); break; \
+ default: __get_user_bad(); \
+ } \
+} while ( false )
+#define get_guest_size get_unsafe_size
+
/**
* __copy_to_user: - Copy a block of data into user space, with less checking
* @to: Destination address, in user space.
switch (n) {
case 1:
- __put_user_size(*(const u8 *)from, (u8 __user *)to, 1, ret, 1);
+ put_guest_size(*(const uint8_t *)from, to, 1, ret, 1);
return ret;
case 2:
- __put_user_size(*(const u16 *)from, (u16 __user *)to, 2, ret, 2);
+ put_guest_size(*(const uint16_t *)from, to, 2, ret, 2);
return ret;
case 4:
- __put_user_size(*(const u32 *)from, (u32 __user *)to, 4, ret, 4);
+ put_guest_size(*(const uint32_t *)from, to, 4, ret, 4);
return ret;
case 8:
- __put_user_size(*(const u64 *)from, (u64 __user *)to, 8, ret, 8);
+ put_guest_size(*(const uint64_t *)from, to, 8, ret, 8);
return ret;
}
}
switch (n) {
case 1:
- __get_user_size(*(u8 *)to, from, 1, ret, 1);
+ get_guest_size(*(uint8_t *)to, from, 1, ret, 1);
return ret;
case 2:
- __get_user_size(*(u16 *)to, from, 2, ret, 2);
+ get_guest_size(*(uint16_t *)to, from, 2, ret, 2);
return ret;
case 4:
- __get_user_size(*(u32 *)to, from, 4, ret, 4);
+ get_guest_size(*(uint32_t *)to, from, 4, ret, 4);
return ret;
case 8:
- __get_user_size(*(u64*)to, from, 8, ret, 8);
+ get_guest_size(*(uint64_t *)to, from, 8, ret, 8);
return ret;
}
}
(likely((count) < (~0U / (size))) && \
compat_access_ok(addr, 0 + (count) * (size)))
-#define __put_user_size(x,ptr,size,retval,errret) \
-do { \
- retval = 0; \
- switch (size) { \
- case 1: __put_user_asm(x,ptr,retval,"b","b","iq",errret);break; \
- case 2: __put_user_asm(x,ptr,retval,"w","w","ir",errret);break; \
- case 4: __put_user_asm(x,ptr,retval,"l","k","ir",errret);break; \
- case 8: __put_user_asm(x,ptr,retval,"q","","ir",errret);break; \
- default: __put_user_bad(); \
- } \
-} while (0)
-
-#define __get_user_size(x,ptr,size,retval,errret) \
-do { \
- retval = 0; \
- switch (size) { \
- case 1: __get_user_asm(x,ptr,retval,"b","b","=q",errret);break; \
- case 2: __get_user_asm(x,ptr,retval,"w","w","=r",errret);break; \
- case 4: __get_user_asm(x,ptr,retval,"l","k","=r",errret);break; \
- case 8: __get_user_asm(x,ptr,retval,"q","","=r",errret); break; \
- default: __get_user_bad(); \
- } \
-} while (0)
-
#endif /* __X86_64_UACCESS_H */
projects / xen.git / commitdiff