uaccess.h

linux-2.6.15.6

		"13:	addq 4,%2\n"			\
		"	clear.d [%0+]\n",		\
			TENTRY				\
		"	.dword 12b,13b\n")

#define __asm_copy_from_user_24(to, from, ret) \
	__asm_copy_from_user_24x_cont(to, from, ret, "", "", "")

/* And now, the to-user ones.  */

#define __asm_copy_to_user_1(to, from, ret)	\
	__asm_copy_user_cont(to, from, ret,	\
		"	move.b [%1+],$acr\n"	\
		"2:	move.b $acr,[%0+]\n",	\
		"3:	jump 1b\n"		\
		"	addq 1,%2\n",		\
		"	.dword 2b,3b\n")

#define __asm_copy_to_user_2x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
	__asm_copy_user_cont(to, from, ret,		\
			COPY				\
		"	move.w [%1+],$acr\n"		\
		"2:	move.w $acr,[%0+]\n",		\
			FIXUP				\
		"3:	jump 1b\n"			\
		"	addq 2,%2\n",			\
			TENTRY				\
		"	.dword 2b,3b\n")

#define __asm_copy_to_user_2(to, from, ret) \
	__asm_copy_to_user_2x_cont(to, from, ret, "", "", "")

#define __asm_copy_to_user_3(to, from, ret) \
	__asm_copy_to_user_2x_cont(to, from, ret,	\
		"	move.b [%1+],$acr\n"		\
		"4:	move.b $acr,[%0+]\n",		\
		"5:	addq 1,%2\n",			\
		"	.dword 4b,5b\n")

#define __asm_copy_to_user_4x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
	__asm_copy_user_cont(to, from, ret,		\
			COPY				\
		"	move.d [%1+],$acr\n"		\
		"2:	move.d $acr,[%0+]\n",		\
			FIXUP				\
		"3:	jump 1b\n"			\
		"	addq 4,%2\n",			\
			TENTRY				\
		"	.dword 2b,3b\n")

#define __asm_copy_to_user_4(to, from, ret) \
	__asm_copy_to_user_4x_cont(to, from, ret, "", "", "")

#define __asm_copy_to_user_5(to, from, ret) \
	__asm_copy_to_user_4x_cont(to, from, ret,	\
		"	move.b [%1+],$acr\n"		\
		"4:	move.b $acr,[%0+]\n",		\
		"5:	addq 1,%2\n",			\
		"	.dword 4b,5b\n")

#define __asm_copy_to_user_6x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
	__asm_copy_to_user_4x_cont(to, from, ret,	\
			COPY				\
		"	move.w [%1+],$acr\n"		\
		"4:	move.w $acr,[%0+]\n",		\
			FIXUP				\
		"5:	addq 2,%2\n",			\
			TENTRY				\
		"	.dword 4b,5b\n")

#define __asm_copy_to_user_6(to, from, ret) \
	__asm_copy_to_user_6x_cont(to, from, ret, "", "", "")

#define __asm_copy_to_user_7(to, from, ret) \
	__asm_copy_to_user_6x_cont(to, from, ret,	\
		"	move.b [%1+],$acr\n"		\
		"6:	move.b $acr,[%0+]\n",		\
		"7:	addq 1,%2\n",			\
		"	.dword 6b,7b\n")

#define __asm_copy_to_user_8x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
	__asm_copy_to_user_4x_cont(to, from, ret,	\
			COPY				\
		"	move.d [%1+],$acr\n"		\
		"4:	move.d $acr,[%0+]\n",		\
			FIXUP				\
		"5:	addq 4,%2\n",			\
			TENTRY				\
		"	.dword 4b,5b\n")

#define __asm_copy_to_user_8(to, from, ret) \
	__asm_copy_to_user_8x_cont(to, from, ret, "", "", "")

#define __asm_copy_to_user_9(to, from, ret) \
	__asm_copy_to_user_8x_cont(to, from, ret,	\
		"	move.b [%1+],$acr\n"		\
		"6:	move.b $acr,[%0+]\n",		\
		"7:	addq 1,%2\n",			\
		"	.dword 6b,7b\n")

#define __asm_copy_to_user_10x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
	__asm_copy_to_user_8x_cont(to, from, ret,	\
			COPY				\
		"	move.w [%1+],$acr\n"		\
		"6:	move.w $acr,[%0+]\n",		\
			FIXUP				\
		"7:	addq 2,%2\n",			\
			TENTRY				\
		"	.dword 6b,7b\n")

#define __asm_copy_to_user_10(to, from, ret) \
	__asm_copy_to_user_10x_cont(to, from, ret, "", "", "")

#define __asm_copy_to_user_11(to, from, ret) \
	__asm_copy_to_user_10x_cont(to, from, ret,	\
		"	move.b [%1+],$acr\n"		\
		"8:	move.b $acr,[%0+]\n",		\
		"9:	addq 1,%2\n",			\
		"	.dword 8b,9b\n")

#define __asm_copy_to_user_12x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
	__asm_copy_to_user_8x_cont(to, from, ret,	\
			COPY				\
		"	move.d [%1+],$acr\n"		\
		"6:	move.d $acr,[%0+]\n",		\
			FIXUP				\
		"7:	addq 4,%2\n",			\
			TENTRY				\
		"	.dword 6b,7b\n")

#define __asm_copy_to_user_12(to, from, ret) \
	__asm_copy_to_user_12x_cont(to, from, ret, "", "", "")

#define __asm_copy_to_user_13(to, from, ret) \
	__asm_copy_to_user_12x_cont(to, from, ret,	\
		"	move.b [%1+],$acr\n"		\
		"8:	move.b $acr,[%0+]\n",		\
		"9:	addq 1,%2\n",			\
		"	.dword 8b,9b\n")

#define __asm_copy_to_user_14x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
	__asm_copy_to_user_12x_cont(to, from, ret,	\
			COPY				\
		"	move.w [%1+],$acr\n"		\
		"8:	move.w $acr,[%0+]\n",		\
			FIXUP				\
		"9:	addq 2,%2\n",			\
			TENTRY				\
		"	.dword 8b,9b\n")

#define __asm_copy_to_user_14(to, from, ret)	\
	__asm_copy_to_user_14x_cont(to, from, ret, "", "", "")

#define __asm_copy_to_user_15(to, from, ret) \
	__asm_copy_to_user_14x_cont(to, from, ret,	\
		"	move.b [%1+],$acr\n"		\
		"10:	move.b $acr,[%0+]\n",		\
		"11:	addq 1,%2\n",			\
		"	.dword 10b,11b\n")

#define __asm_copy_to_user_16x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
	__asm_copy_to_user_12x_cont(to, from, ret,	\
			COPY				\
		"	move.d [%1+],$acr\n"		\
		"8:	move.d $acr,[%0+]\n",		\
			FIXUP				\
		"9:	addq 4,%2\n",			\
			TENTRY				\
		"	.dword 8b,9b\n")

#define __asm_copy_to_user_16(to, from, ret) \
	__asm_copy_to_user_16x_cont(to, from, ret, "", "", "")

#define __asm_copy_to_user_20x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
	__asm_copy_to_user_16x_cont(to, from, ret,	\
			COPY				\
		"	move.d [%1+],$acr\n"		\
		"10:	move.d $acr,[%0+]\n",		\
			FIXUP				\
		"11:	addq 4,%2\n",			\
			TENTRY				\
		"	.dword 10b,11b\n")

#define __asm_copy_to_user_20(to, from, ret) \
	__asm_copy_to_user_20x_cont(to, from, ret, "", "", "")

#define __asm_copy_to_user_24x_cont(to, from, ret, COPY, FIXUP, TENTRY)	\
	__asm_copy_to_user_20x_cont(to, from, ret,	\
			COPY				\
		"	move.d [%1+],$acr\n"		\
		"12:	move.d $acr,[%0+]\n",		\
			FIXUP				\
		"13:	addq 4,%2\n",			\
			TENTRY				\
		"	.dword 12b,13b\n")

#define __asm_copy_to_user_24(to, from, ret)	\
	__asm_copy_to_user_24x_cont(to, from, ret, "", "", "")

/* Define a few clearing asms with exception handlers.  */

/* This frame-asm is like the __asm_copy_user_cont one, but has one less
   input.  */

#define __asm_clear(to, ret, CLEAR, FIXUP, TENTRY) \
	__asm__ __volatile__ (				\
			CLEAR				\
		"1:\n"					\
		"	.section .fixup,\"ax\"\n"	\
			FIXUP				\
		"	.previous\n"			\
		"	.section __ex_table,\"a\"\n"	\
			TENTRY				\
		"	.previous"			\
		: "=b" (to), "=r" (ret)			\
		: "0" (to), "1" (ret)			\
		: "memory")

#define __asm_clear_1(to, ret) \
	__asm_clear(to, ret,			\
		"2:	clear.b [%0+]\n",	\
		"3:	jump 1b\n"		\
		"	addq 1,%1\n",		\
		"	.dword 2b,3b\n")

#define __asm_clear_2(to, ret) \
	__asm_clear(to, ret,			\
		"2:	clear.w [%0+]\n",	\
		"3:	jump 1b\n"		\
		"	addq 2,%1\n",		\
		"	.dword 2b,3b\n")

#define __asm_clear_3(to, ret) \
     __asm_clear(to, ret,			\
		 "2:	clear.w [%0+]\n"	\
		 "3:	clear.b [%0+]\n",	\
		 "4:	addq 2,%1\n"		\
		 "5:	jump 1b\n"		\
		 "	addq 1,%1\n",		\
		 "	.dword 2b,4b\n"		\
		 "	.dword 3b,5b\n")

#define __asm_clear_4x_cont(to, ret, CLEAR, FIXUP, TENTRY) \
	__asm_clear(to, ret,				\
			CLEAR				\
		"2:	clear.d [%0+]\n",		\
			FIXUP				\
		"3:	jump 1b\n"			\
		"	addq 4,%1\n",			\
			TENTRY				\
		"	.dword 2b,3b\n")

#define __asm_clear_4(to, ret) \
	__asm_clear_4x_cont(to, ret, "", "", "")

#define __asm_clear_8x_cont(to, ret, CLEAR, FIXUP, TENTRY) \
	__asm_clear_4x_cont(to, ret,			\
			CLEAR				\
		"4:	clear.d [%0+]\n",		\
			FIXUP				\
		"5:	addq 4,%1\n",			\
			TENTRY				\
		"	.dword 4b,5b\n")

#define __asm_clear_8(to, ret) \
	__asm_clear_8x_cont(to, ret, "", "", "")

#define __asm_clear_12x_cont(to, ret, CLEAR, FIXUP, TENTRY) \
	__asm_clear_8x_cont(to, ret,			\
			CLEAR				\
		"6:	clear.d [%0+]\n",		\
			FIXUP				\
		"7:	addq 4,%1\n",			\
			TENTRY				\
		"	.dword 6b,7b\n")

#define __asm_clear_12(to, ret) \
	__asm_clear_12x_cont(to, ret, "", "", "")

#define __asm_clear_16x_cont(to, ret, CLEAR, FIXUP, TENTRY) \
	__asm_clear_12x_cont(to, ret,			\
			CLEAR				\
		"8:	clear.d [%0+]\n",		\
			FIXUP				\
		"9:	addq 4,%1\n",			\
			TENTRY				\
		"	.dword 8b,9b\n")

#define __asm_clear_16(to, ret) \
	__asm_clear_16x_cont(to, ret, "", "", "")

#define __asm_clear_20x_cont(to, ret, CLEAR, FIXUP, TENTRY) \
	__asm_clear_16x_cont(to, ret,			\
			CLEAR				\
		"10:	clear.d [%0+]\n",		\
			FIXUP				\
		"11:	addq 4,%1\n",			\
			TENTRY				\
		"	.dword 10b,11b\n")

#define __asm_clear_20(to, ret) \
	__asm_clear_20x_cont(to, ret, "", "", "")

#define __asm_clear_24x_cont(to, ret, CLEAR, FIXUP, TENTRY) \
	__asm_clear_20x_cont(to, ret,			\
			CLEAR				\
		"12:	clear.d [%0+]\n",		\
			FIXUP				\
		"13:	addq 4,%1\n",			\
			TENTRY				\
		"	.dword 12b,13b\n")

#define __asm_clear_24(to, ret) \
	__asm_clear_24x_cont(to, ret, "", "", "")

/*
 * Return the size of a string (including the ending 0)
 *
 * Return length of string in userspace including terminating 0
 * or 0 for error.  Return a value greater than N if too long.
 */

static inline long
strnlen_user(const char *s, long n)
{
	long res, tmp1;

	if (!access_ok(VERIFY_READ, s, 0))
		return 0;

	/*
	 * This code is deduced from:
	 *
	 *	tmp1 = n;
	 *	while (tmp1-- > 0 && *s++)
	 *	  ;
	 *
	 *	res = n - tmp1;
	 *
	 *  (with tweaks).
	 */

	__asm__ __volatile__ (
		"	move.d %1,$acr\n"
		"	cmpq 0,$acr\n"
		"0:\n"
		"	ble 1f\n"
		"	subq 1,$acr\n"

		"4:	test.b [%0+]\n"
		"	bne 0b\n"
		"	cmpq 0,$acr\n"
		"1:\n"
		"	move.d %1,%0\n"
		"	sub.d $acr,%0\n"
		"2:\n"
		"	.section .fixup,\"ax\"\n"

		"3:	jump 2b\n"
		"	clear.d %0\n"

		"	.previous\n"
		"	.section __ex_table,\"a\"\n"
		"	.dword 4b,3b\n"
		"	.previous\n"
		: "=r" (res), "=r" (tmp1)
		: "0" (s), "1" (n)
		: "acr");

	return res;
}

#endif