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Diffstat (limited to 'include/asm-m68k/uaccess.h')
-rw-r--r--include/asm-m68k/uaccess.h889
1 files changed, 0 insertions, 889 deletions
diff --git a/include/asm-m68k/uaccess.h b/include/asm-m68k/uaccess.h
deleted file mode 100644
index 2ffd87b0a76..00000000000
--- a/include/asm-m68k/uaccess.h
+++ /dev/null
@@ -1,889 +0,0 @@
-#ifndef __M68K_UACCESS_H
-#define __M68K_UACCESS_H
-
-/*
- * User space memory access functions
- */
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <asm/segment.h>
-
-#define VERIFY_READ 0
-#define VERIFY_WRITE 1
-
-/* We let the MMU do all checking */
-#define access_ok(type,addr,size) 1
-
-/*
- * The exception table consists of pairs of addresses: the first is the
- * address of an instruction that is allowed to fault, and the second is
- * the address at which the program should continue. No registers are
- * modified, so it is entirely up to the continuation code to figure out
- * what to do.
- *
- * All the routines below use bits of fixup code that are out of line
- * with the main instruction path. This means when everything is well,
- * we don't even have to jump over them. Further, they do not intrude
- * on our cache or tlb entries.
- */
-
-struct exception_table_entry
-{
- unsigned long insn, fixup;
-};
-
-
-/*
- * These are the main single-value transfer routines. They automatically
- * use the right size if we just have the right pointer type.
- */
-
-#define put_user(x, ptr) \
-({ \
- int __pu_err; \
- typeof(*(ptr)) __pu_val = (x); \
- __chk_user_ptr(ptr); \
- switch (sizeof (*(ptr))) { \
- case 1: \
- __put_user_asm(__pu_err, __pu_val, ptr, b); \
- break; \
- case 2: \
- __put_user_asm(__pu_err, __pu_val, ptr, w); \
- break; \
- case 4: \
- __put_user_asm(__pu_err, __pu_val, ptr, l); \
- break; \
- case 8: \
- __pu_err = __constant_copy_to_user(ptr, &__pu_val, 8); \
- break; \
- default: \
- __pu_err = __put_user_bad(); \
- break; \
- } \
- __pu_err; \
-})
-#define __put_user(x, ptr) put_user(x, ptr)
-
-extern int __put_user_bad(void);
-
-/*
- * Tell gcc we read from memory instead of writing: this is because
- * we do not write to any memory gcc knows about, so there are no
- * aliasing issues.
- */
-#define __put_user_asm(err,x,ptr,bwl) \
-__asm__ __volatile__ \
- ("21:moves" #bwl " %2,%1\n" \
- "1:\n" \
- ".section .fixup,\"ax\"\n" \
- " .even\n" \
- "2: movel %3,%0\n" \
- " jra 1b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 21b,2b\n" \
- " .long 1b,2b\n" \
- ".previous" \
- : "=d"(err) \
- : "m"(*(ptr)), "r"(x), "i"(-EFAULT), "0"(0))
-
-#define get_user(x, ptr) \
-({ \
- int __gu_err; \
- typeof(*(ptr)) __gu_val; \
- __chk_user_ptr(ptr); \
- switch (sizeof(*(ptr))) { \
- case 1: \
- __get_user_asm(__gu_err, __gu_val, ptr, b, "=d"); \
- break; \
- case 2: \
- __get_user_asm(__gu_err, __gu_val, ptr, w, "=r"); \
- break; \
- case 4: \
- __get_user_asm(__gu_err, __gu_val, ptr, l, "=r"); \
- break; \
- case 8: \
- __gu_err = __constant_copy_from_user(&__gu_val, ptr, 8); \
- break; \
- default: \
- __gu_val = (typeof(*(ptr)))0; \
- __gu_err = __get_user_bad(); \
- break; \
- } \
- (x) = __gu_val; \
- __gu_err; \
-})
-#define __get_user(x, ptr) get_user(x, ptr)
-
-extern int __get_user_bad(void);
-
-#define __get_user_asm(err,x,ptr,bwl,reg) \
-__asm__ __volatile__ \
- ("1: moves" #bwl " %2,%1\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- " .even\n" \
- "3: movel %3,%0\n" \
- " sub" #bwl " %1,%1\n" \
- " jra 2b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 1b,3b\n" \
- ".previous" \
- : "=d"(err), reg(x) \
- : "m"(*(ptr)), "i" (-EFAULT), "0"(0))
-
-static inline unsigned long
-__generic_copy_from_user(void *to, const void __user *from, unsigned long n)
-{
- unsigned long tmp;
- __asm__ __volatile__
- (" tstl %2\n"
- " jeq 2f\n"
- "1: movesl (%1)+,%3\n"
- " movel %3,(%0)+\n"
- " subql #1,%2\n"
- " jne 1b\n"
- "2: movel %4,%2\n"
- " bclr #1,%2\n"
- " jeq 4f\n"
- "3: movesw (%1)+,%3\n"
- " movew %3,(%0)+\n"
- "4: bclr #0,%2\n"
- " jeq 6f\n"
- "5: movesb (%1)+,%3\n"
- " moveb %3,(%0)+\n"
- "6:\n"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "7: movel %2,%%d0\n"
- "71:clrl (%0)+\n"
- " subql #1,%%d0\n"
- " jne 71b\n"
- " lsll #2,%2\n"
- " addl %4,%2\n"
- " btst #1,%4\n"
- " jne 81f\n"
- " btst #0,%4\n"
- " jne 91f\n"
- " jra 6b\n"
- "8: addql #2,%2\n"
- "81:clrw (%0)+\n"
- " btst #0,%4\n"
- " jne 91f\n"
- " jra 6b\n"
- "9: addql #1,%2\n"
- "91:clrb (%0)+\n"
- " jra 6b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 1b,7b\n"
- " .long 3b,8b\n"
- " .long 5b,9b\n"
- ".previous"
- : "=a"(to), "=a"(from), "=d"(n), "=&d"(tmp)
- : "d"(n & 3), "0"(to), "1"(from), "2"(n/4)
- : "d0", "memory");
- return n;
-}
-
-static inline unsigned long
-__generic_copy_to_user(void __user *to, const void *from, unsigned long n)
-{
- unsigned long tmp;
- __asm__ __volatile__
- (" tstl %2\n"
- " jeq 3f\n"
- "1: movel (%1)+,%3\n"
- "22:movesl %3,(%0)+\n"
- "2: subql #1,%2\n"
- " jne 1b\n"
- "3: movel %4,%2\n"
- " bclr #1,%2\n"
- " jeq 4f\n"
- " movew (%1)+,%3\n"
- "24:movesw %3,(%0)+\n"
- "4: bclr #0,%2\n"
- " jeq 5f\n"
- " moveb (%1)+,%3\n"
- "25:movesb %3,(%0)+\n"
- "5:\n"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "60:addql #1,%2\n"
- "6: lsll #2,%2\n"
- " addl %4,%2\n"
- " jra 5b\n"
- "7: addql #2,%2\n"
- " jra 5b\n"
- "8: addql #1,%2\n"
- " jra 5b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 1b,60b\n"
- " .long 22b,6b\n"
- " .long 2b,6b\n"
- " .long 24b,7b\n"
- " .long 3b,60b\n"
- " .long 4b,7b\n"
- " .long 25b,8b\n"
- " .long 5b,8b\n"
- ".previous"
- : "=a"(to), "=a"(from), "=d"(n), "=&d"(tmp)
- : "r"(n & 3), "0"(to), "1"(from), "2"(n / 4)
- : "memory");
- return n;
-}
-
-#define __copy_from_user_big(to, from, n, fixup, copy) \
- __asm__ __volatile__ \
- ("10: movesl (%1)+,%%d0\n" \
- " movel %%d0,(%0)+\n" \
- " subql #1,%2\n" \
- " jne 10b\n" \
- ".section .fixup,\"ax\"\n" \
- " .even\n" \
- "11: movel %2,%%d0\n" \
- "13: clrl (%0)+\n" \
- " subql #1,%%d0\n" \
- " jne 13b\n" \
- " lsll #2,%2\n" \
- fixup "\n" \
- " jra 12f\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 10b,11b\n" \
- ".previous\n" \
- copy "\n" \
- "12:" \
- : "=a"(to), "=a"(from), "=d"(n) \
- : "0"(to), "1"(from), "2"(n/4) \
- : "d0", "memory")
-
-static inline unsigned long
-__constant_copy_from_user(void *to, const void __user *from, unsigned long n)
-{
- switch (n) {
- case 0:
- break;
- case 1:
- __asm__ __volatile__
- ("1: movesb (%1)+,%%d0\n"
- " moveb %%d0,(%0)+\n"
- "2:\n"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "3: addql #1,%2\n"
- " clrb (%0)+\n"
- " jra 2b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 1b,3b\n"
- ".previous"
- : "=a"(to), "=a"(from), "=d"(n)
- : "0"(to), "1"(from), "2"(0)
- : "d0", "memory");
- break;
- case 2:
- __asm__ __volatile__
- ("1: movesw (%1)+,%%d0\n"
- " movew %%d0,(%0)+\n"
- "2:\n"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "3: addql #2,%2\n"
- " clrw (%0)+\n"
- " jra 2b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 1b,3b\n"
- ".previous"
- : "=a"(to), "=a"(from), "=d"(n)
- : "0"(to), "1"(from), "2"(0)
- : "d0", "memory");
- break;
- case 3:
- __asm__ __volatile__
- ("1: movesw (%1)+,%%d0\n"
- " movew %%d0,(%0)+\n"
- "2: movesb (%1)+,%%d0\n"
- " moveb %%d0,(%0)+\n"
- "3:"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "4: addql #2,%2\n"
- " clrw (%0)+\n"
- "5: addql #1,%2\n"
- " clrb (%0)+\n"
- " jra 3b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 1b,4b\n"
- " .long 2b,5b\n"
- ".previous"
- : "=a"(to), "=a"(from), "=d"(n)
- : "0"(to), "1"(from), "2"(0)
- : "d0", "memory");
- break;
- case 4:
- __asm__ __volatile__
- ("1: movesl (%1)+,%%d0\n"
- " movel %%d0,(%0)+\n"
- "2:"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "3: addql #4,%2\n"
- " clrl (%0)+\n"
- " jra 2b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 1b,3b\n"
- ".previous"
- : "=a"(to), "=a"(from), "=d"(n)
- : "0"(to), "1"(from), "2"(0)
- : "d0", "memory");
- break;
- case 8:
- __asm__ __volatile__
- ("1: movesl (%1)+,%%d0\n"
- " movel %%d0,(%0)+\n"
- "2: movesl (%1)+,%%d0\n"
- " movel %%d0,(%0)+\n"
- "3:"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "4: addql #4,%2\n"
- " clrl (%0)+\n"
- "5: addql #4,%2\n"
- " clrl (%0)+\n"
- " jra 3b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 1b,4b\n"
- " .long 2b,5b\n"
- ".previous"
- : "=a"(to), "=a"(from), "=d"(n)
- : "0"(to), "1"(from), "2"(0)
- : "d0", "memory");
- break;
- case 12:
- __asm__ __volatile__
- ("1: movesl (%1)+,%%d0\n"
- " movel %%d0,(%0)+\n"
- "2: movesl (%1)+,%%d0\n"
- " movel %%d0,(%0)+\n"
- "3: movesl (%1)+,%%d0\n"
- " movel %%d0,(%0)+\n"
- "4:"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "5: addql #4,%2\n"
- " clrl (%0)+\n"
- "6: addql #4,%2\n"
- " clrl (%0)+\n"
- "7: addql #4,%2\n"
- " clrl (%0)+\n"
- " jra 4b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 1b,5b\n"
- " .long 2b,6b\n"
- " .long 3b,7b\n"
- ".previous"
- : "=a"(to), "=a"(from), "=d"(n)
- : "0"(to), "1"(from), "2"(0)
- : "d0", "memory");
- break;
- case 16:
- __asm__ __volatile__
- ("1: movesl (%1)+,%%d0\n"
- " movel %%d0,(%0)+\n"
- "2: movesl (%1)+,%%d0\n"
- " movel %%d0,(%0)+\n"
- "3: movesl (%1)+,%%d0\n"
- " movel %%d0,(%0)+\n"
- "4: movesl (%1)+,%%d0\n"
- " movel %%d0,(%0)+\n"
- "5:"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "6: addql #4,%2\n"
- " clrl (%0)+\n"
- "7: addql #4,%2\n"
- " clrl (%0)+\n"
- "8: addql #4,%2\n"
- " clrl (%0)+\n"
- "9: addql #4,%2\n"
- " clrl (%0)+\n"
- " jra 5b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 1b,6b\n"
- " .long 2b,7b\n"
- " .long 3b,8b\n"
- " .long 4b,9b\n"
- ".previous"
- : "=a"(to), "=a"(from), "=d"(n)
- : "0"(to), "1"(from), "2"(0)
- : "d0", "memory");
- break;
- default:
- switch (n & 3) {
- case 0:
- __copy_from_user_big(to, from, n, "", "");
- break;
- case 1:
- __copy_from_user_big(to, from, n,
- /* fixup */
- "1: addql #1,%2\n"
- " clrb (%0)+",
- /* copy */
- "2: movesb (%1)+,%%d0\n"
- " moveb %%d0,(%0)+\n"
- ".section __ex_table,\"a\"\n"
- " .long 2b,1b\n"
- ".previous");
- break;
- case 2:
- __copy_from_user_big(to, from, n,
- /* fixup */
- "1: addql #2,%2\n"
- " clrw (%0)+",
- /* copy */
- "2: movesw (%1)+,%%d0\n"
- " movew %%d0,(%0)+\n"
- ".section __ex_table,\"a\"\n"
- " .long 2b,1b\n"
- ".previous");
- break;
- case 3:
- __copy_from_user_big(to, from, n,
- /* fixup */
- "1: addql #2,%2\n"
- " clrw (%0)+\n"
- "2: addql #1,%2\n"
- " clrb (%0)+",
- /* copy */
- "3: movesw (%1)+,%%d0\n"
- " movew %%d0,(%0)+\n"
- "4: movesb (%1)+,%%d0\n"
- " moveb %%d0,(%0)+\n"
- ".section __ex_table,\"a\"\n"
- " .long 3b,1b\n"
- " .long 4b,2b\n"
- ".previous");
- break;
- }
- break;
- }
- return n;
-}
-
-#define __copy_to_user_big(to, from, n, fixup, copy) \
- __asm__ __volatile__ \
- ("10: movel (%1)+,%%d0\n" \
- "31: movesl %%d0,(%0)+\n" \
- "11: subql #1,%2\n" \
- " jne 10b\n" \
- "41:\n" \
- ".section .fixup,\"ax\"\n" \
- " .even\n" \
- "22: addql #1,%2\n" \
- "12: lsll #2,%2\n" \
- fixup "\n" \
- " jra 13f\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 10b,22b\n" \
- " .long 31b,12b\n" \
- " .long 11b,12b\n" \
- " .long 41b,22b\n" \
- ".previous\n" \
- copy "\n" \
- "13:" \
- : "=a"(to), "=a"(from), "=d"(n) \
- : "0"(to), "1"(from), "2"(n/4) \
- : "d0", "memory")
-
-#define __copy_to_user_inatomic __copy_to_user
-#define __copy_from_user_inatomic __copy_from_user
-
-static inline unsigned long
-__constant_copy_to_user(void __user *to, const void *from, unsigned long n)
-{
- switch (n) {
- case 0:
- break;
- case 1:
- __asm__ __volatile__
- (" moveb (%1)+,%%d0\n"
- "21:movesb %%d0,(%0)+\n"
- "1:\n"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "2: addql #1,%2\n"
- " jra 1b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n "
- " .long 21b,2b\n"
- " .long 1b,2b\n"
- ".previous"
- : "=a"(to), "=a"(from), "=d"(n)
- : "0"(to), "1"(from), "2"(0)
- : "d0", "memory");
- break;
- case 2:
- __asm__ __volatile__
- (" movew (%1)+,%%d0\n"
- "21:movesw %%d0,(%0)+\n"
- "1:\n"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "2: addql #2,%2\n"
- " jra 1b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 21b,2b\n"
- " .long 1b,2b\n"
- ".previous"
- : "=a"(to), "=a"(from), "=d"(n)
- : "0"(to), "1"(from), "2"(0)
- : "d0", "memory");
- break;
- case 3:
- __asm__ __volatile__
- (" movew (%1)+,%%d0\n"
- "21:movesw %%d0,(%0)+\n"
- "1: moveb (%1)+,%%d0\n"
- "22:movesb %%d0,(%0)+\n"
- "2:\n"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "3: addql #2,%2\n"
- "4: addql #1,%2\n"
- " jra 2b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 21b,3b\n"
- " .long 1b,3b\n"
- " .long 22b,4b\n"
- " .long 2b,4b\n"
- ".previous"
- : "=a"(to), "=a"(from), "=d"(n)
- : "0"(to), "1"(from), "2"(0)
- : "d0", "memory");
- break;
- case 4:
- __asm__ __volatile__
- (" movel (%1)+,%%d0\n"
- "21:movesl %%d0,(%0)+\n"
- "1:\n"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "2: addql #4,%2\n"
- " jra 1b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 21b,2b\n"
- " .long 1b,2b\n"
- ".previous"
- : "=a"(to), "=a"(from), "=d"(n)
- : "0"(to), "1"(from), "2"(0)
- : "d0", "memory");
- break;
- case 8:
- __asm__ __volatile__
- (" movel (%1)+,%%d0\n"
- "21:movesl %%d0,(%0)+\n"
- "1: movel (%1)+,%%d0\n"
- "22:movesl %%d0,(%0)+\n"
- "2:\n"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "3: addql #4,%2\n"
- "4: addql #4,%2\n"
- " jra 2b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 21b,3b\n"
- " .long 1b,3b\n"
- " .long 22b,4b\n"
- " .long 2b,4b\n"
- ".previous"
- : "=a"(to), "=a"(from), "=d"(n)
- : "0"(to), "1"(from), "2"(0)
- : "d0", "memory");
- break;
- case 12:
- __asm__ __volatile__
- (" movel (%1)+,%%d0\n"
- "21:movesl %%d0,(%0)+\n"
- "1: movel (%1)+,%%d0\n"
- "22:movesl %%d0,(%0)+\n"
- "2: movel (%1)+,%%d0\n"
- "23:movesl %%d0,(%0)+\n"
- "3:\n"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "4: addql #4,%2\n"
- "5: addql #4,%2\n"
- "6: addql #4,%2\n"
- " jra 3b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 21b,4b\n"
- " .long 1b,4b\n"
- " .long 22b,5b\n"
- " .long 2b,5b\n"
- " .long 23b,6b\n"
- " .long 3b,6b\n"
- ".previous"
- : "=a"(to), "=a"(from), "=d"(n)
- : "0"(to), "1"(from), "2"(0)
- : "d0", "memory");
- break;
- case 16:
- __asm__ __volatile__
- (" movel (%1)+,%%d0\n"
- "21:movesl %%d0,(%0)+\n"
- "1: movel (%1)+,%%d0\n"
- "22:movesl %%d0,(%0)+\n"
- "2: movel (%1)+,%%d0\n"
- "23:movesl %%d0,(%0)+\n"
- "3: movel (%1)+,%%d0\n"
- "24:movesl %%d0,(%0)+\n"
- "4:"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "5: addql #4,%2\n"
- "6: addql #4,%2\n"
- "7: addql #4,%2\n"
- "8: addql #4,%2\n"
- " jra 4b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 21b,5b\n"
- " .long 1b,5b\n"
- " .long 22b,6b\n"
- " .long 2b,6b\n"
- " .long 23b,7b\n"
- " .long 3b,7b\n"
- " .long 24b,8b\n"
- " .long 4b,8b\n"
- ".previous"
- : "=a"(to), "=a"(from), "=d"(n)
- : "0"(to), "1"(from), "2"(0)
- : "d0", "memory");
- break;
- default:
- switch (n & 3) {
- case 0:
- __copy_to_user_big(to, from, n, "", "");
- break;
- case 1:
- __copy_to_user_big(to, from, n,
- /* fixup */
- "1: addql #1,%2",
- /* copy */
- " moveb (%1)+,%%d0\n"
- "22:movesb %%d0,(%0)+\n"
- "2:"
- ".section __ex_table,\"a\"\n"
- " .long 22b,1b\n"
- " .long 2b,1b\n"
- ".previous");
- break;
- case 2:
- __copy_to_user_big(to, from, n,
- /* fixup */
- "1: addql #2,%2",
- /* copy */
- " movew (%1)+,%%d0\n"
- "22:movesw %%d0,(%0)+\n"
- "2:"
- ".section __ex_table,\"a\"\n"
- " .long 22b,1b\n"
- " .long 2b,1b\n"
- ".previous");
- break;
- case 3:
- __copy_to_user_big(to, from, n,
- /* fixup */
- "1: addql #2,%2\n"
- "2: addql #1,%2",
- /* copy */
- " movew (%1)+,%%d0\n"
- "23:movesw %%d0,(%0)+\n"
- "3: moveb (%1)+,%%d0\n"
- "24:movesb %%d0,(%0)+\n"
- "4:"
- ".section __ex_table,\"a\"\n"
- " .long 23b,1b\n"
- " .long 3b,1b\n"
- " .long 24b,2b\n"
- " .long 4b,2b\n"
- ".previous");
- break;
- }
- break;
- }
- return n;
-}
-
-#define copy_from_user(to, from, n) \
-(__builtin_constant_p(n) ? \
- __constant_copy_from_user(to, from, n) : \
- __generic_copy_from_user(to, from, n))
-
-#define copy_to_user(to, from, n) \
-(__builtin_constant_p(n) ? \
- __constant_copy_to_user(to, from, n) : \
- __generic_copy_to_user(to, from, n))
-
-#define __copy_from_user(to, from, n) copy_from_user(to, from, n)
-#define __copy_to_user(to, from, n) copy_to_user(to, from, n)
-
-/*
- * Copy a null terminated string from userspace.
- */
-
-static inline long
-strncpy_from_user(char *dst, const char __user *src, long count)
-{
- long res;
- if (count == 0) return count;
- __asm__ __volatile__
- ("1: movesb (%2)+,%%d0\n"
- "12:moveb %%d0,(%1)+\n"
- " jeq 2f\n"
- " subql #1,%3\n"
- " jne 1b\n"
- "2: subl %3,%0\n"
- "3:\n"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "4: movel %4,%0\n"
- " jra 3b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 1b,4b\n"
- " .long 12b,4b\n"
- ".previous"
- : "=d"(res), "=a"(dst), "=a"(src), "=d"(count)
- : "i"(-EFAULT), "0"(count), "1"(dst), "2"(src), "3"(count)
- : "d0", "memory");
- return res;
-}
-
-/*
- * Return the size of a string (including the ending 0)
- *
- * Return 0 on exception, a value greater than N if too long
- */
-static inline long strnlen_user(const char __user *src, long n)
-{
- long res;
-
- res = -(unsigned long)src;
- __asm__ __volatile__
- ("1:\n"
- " tstl %2\n"
- " jeq 3f\n"
- "2: movesb (%1)+,%%d0\n"
- "22:\n"
- " subql #1,%2\n"
- " tstb %%d0\n"
- " jne 1b\n"
- " jra 4f\n"
- "3:\n"
- " addql #1,%0\n"
- "4:\n"
- " addl %1,%0\n"
- "5:\n"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "6: moveq %3,%0\n"
- " jra 5b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 2b,6b\n"
- " .long 22b,6b\n"
- ".previous"
- : "=d"(res), "=a"(src), "=d"(n)
- : "i"(0), "0"(res), "1"(src), "2"(n)
- : "d0");
- return res;
-}
-
-#define strlen_user(str) strnlen_user(str, 32767)
-
-/*
- * Zero Userspace
- */
-
-static inline unsigned long
-clear_user(void __user *to, unsigned long n)
-{
- __asm__ __volatile__
- (" tstl %1\n"
- " jeq 3f\n"
- "1: movesl %3,(%0)+\n"
- "2: subql #1,%1\n"
- " jne 1b\n"
- "3: movel %2,%1\n"
- " bclr #1,%1\n"
- " jeq 4f\n"
- "24:movesw %3,(%0)+\n"
- "4: bclr #0,%1\n"
- " jeq 5f\n"
- "25:movesb %3,(%0)+\n"
- "5:\n"
- ".section .fixup,\"ax\"\n"
- " .even\n"
- "61:addql #1,%1\n"
- "6: lsll #2,%1\n"
- " addl %2,%1\n"
- " jra 5b\n"
- "7: addql #2,%1\n"
- " jra 5b\n"
- "8: addql #1,%1\n"
- " jra 5b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 1b,61b\n"
- " .long 2b,6b\n"
- " .long 3b,61b\n"
- " .long 24b,7b\n"
- " .long 4b,7b\n"
- " .long 25b,8b\n"
- " .long 5b,8b\n"
- ".previous"
- : "=a"(to), "=d"(n)
- : "r"(n & 3), "r"(0), "0"(to), "1"(n/4));
- return n;
-}
-
-#endif /* _M68K_UACCESS_H */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 22:27:07 +0000