Define specialised get_user_instr(), __get_user_instr() and
__get_user_instr_inatomic() macros for reading instructions from user
and/or kernel space.
Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Reviewed-by: Alistair Popple <alistair@popple.id.au>
[mpe: Squash in addition of get_user_instr() & __user annotations]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200506034050.24806-17-jniethe5@gmail.com
#define __put_user_inatomic(x, ptr) \
__put_user_nosleep((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
+#define get_user_instr(x, ptr) \
+ get_user((x).val, (u32 __user *)(ptr))
+
+#define __get_user_instr(x, ptr) \
+ __get_user_nocheck((x).val, (u32 __user *)(ptr), sizeof(u32), true)
+
+#define __get_user_instr_inatomic(x, ptr) \
+ __get_user_nosleep((x).val, (u32 __user *)(ptr), sizeof(u32))
+
extern long __put_user_bad(void);
/*
*/
CHECK_FULL_REGS(regs);
- if (unlikely(__get_user(instr.val, (unsigned int __user *)regs->nip)))
+ if (unlikely(__get_user_instr(instr, (void __user *)regs->nip)))
return -EFAULT;
if ((regs->msr & MSR_LE) != (MSR_KERNEL & MSR_LE)) {
/* We don't handle PPC little-endian any more... */
struct instruction_op op;
unsigned long addr = info->address;
- if (__get_user_inatomic(instr.val, (unsigned int *)regs->nip))
+ if (__get_user_instr_inatomic(instr, (void __user *)regs->nip))
goto fail;
ret = analyse_instr(&op, regs, instr);
unsigned int va, vb, vc, vd;
vector128 *vrs;
- if (get_user(instr.val, (unsigned int __user *)regs->nip))
+ if (get_user_instr(instr, (void __user *)regs->nip))
return -EFAULT;
word = ppc_inst_val(instr);