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author | kaf24@scramble.cl.cam.ac.uk <kaf24@scramble.cl.cam.ac.uk> | 2004-07-05 15:01:15 +0000 |
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committer | kaf24@scramble.cl.cam.ac.uk <kaf24@scramble.cl.cam.ac.uk> | 2004-07-05 15:01:15 +0000 |
commit | 393024529af7c699a3ec17ad40d7935e80b8fa13 (patch) | |
tree | 5ffe64dd4452320cdf59fbc9cb32f17d7389e3f6 /xen/arch/x86/usercopy.c | |
parent | 4d106af12c2d4b9b0a6dc2bca6f5d2924752b910 (diff) | |
download | xen-393024529af7c699a3ec17ad40d7935e80b8fa13.tar.gz xen-393024529af7c699a3ec17ad40d7935e80b8fa13.tar.bz2 xen-393024529af7c699a3ec17ad40d7935e80b8fa13.zip |
bitkeeper revision 1.1041.6.6 (40e96d3bioFNWNS55cowRl9PXLQZ9Q)
More x86-64 stuff.
Diffstat (limited to 'xen/arch/x86/usercopy.c')
-rw-r--r-- | xen/arch/x86/usercopy.c | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/xen/arch/x86/usercopy.c b/xen/arch/x86/usercopy.c deleted file mode 100644 index dc2d34cb90..0000000000 --- a/xen/arch/x86/usercopy.c +++ /dev/null @@ -1,190 +0,0 @@ -/* - * User address space access functions. - * The non inlined parts of asm-i386/uaccess.h are here. - * - * Copyright 1997 Andi Kleen <ak@muc.de> - * Copyright 1997 Linus Torvalds - */ -#include <xen/config.h> -#include <asm/uaccess.h> -//#include <asm/mmx.h> - -#ifdef CONFIG_X86_USE_3DNOW_AND_WORKS - -unsigned long -__generic_copy_to_user(void *to, const void *from, unsigned long n) -{ - if (access_ok(VERIFY_WRITE, to, n)) - { - if(n<512) - __copy_user(to,from,n); - else - mmx_copy_user(to,from,n); - } - return n; -} - -unsigned long -__generic_copy_from_user(void *to, const void *from, unsigned long n) -{ - if (access_ok(VERIFY_READ, from, n)) - { - if(n<512) - __copy_user_zeroing(to,from,n); - else - mmx_copy_user_zeroing(to, from, n); - } - else - memset(to, 0, n); - return n; -} - -#else - -unsigned long -__generic_copy_to_user(void *to, const void *from, unsigned long n) -{ - prefetch(from); - if (access_ok(VERIFY_WRITE, to, n)) - __copy_user(to,from,n); - return n; -} - -unsigned long -__generic_copy_from_user(void *to, const void *from, unsigned long n) -{ - prefetchw(to); - if (access_ok(VERIFY_READ, from, n)) - __copy_user_zeroing(to,from,n); - else - memset(to, 0, n); - return n; -} - -#endif - -/* - * Copy a null terminated string from userspace. - */ - -#define __do_strncpy_from_user(dst,src,count,res) \ -do { \ - int __d0, __d1, __d2; \ - __asm__ __volatile__( \ - " testl %1,%1\n" \ - " jz 2f\n" \ - "0: lodsb\n" \ - " stosb\n" \ - " testb %%al,%%al\n" \ - " jz 1f\n" \ - " decl %1\n" \ - " jnz 0b\n" \ - "1: subl %1,%0\n" \ - "2:\n" \ - ".section .fixup,\"ax\"\n" \ - "3: movl %5,%0\n" \ - " jmp 2b\n" \ - ".previous\n" \ - ".section __ex_table,\"a\"\n" \ - " .align 4\n" \ - " .long 0b,3b\n" \ - ".previous" \ - : "=d"(res), "=c"(count), "=&a" (__d0), "=&S" (__d1), \ - "=&D" (__d2) \ - : "i"(-EFAULT), "0"(count), "1"(count), "3"(src), "4"(dst) \ - : "memory"); \ -} while (0) - -long -__strncpy_from_user(char *dst, const char *src, long count) -{ - long res; - __do_strncpy_from_user(dst, src, count, res); - return res; -} - -long -strncpy_from_user(char *dst, const char *src, long count) -{ - long res = -EFAULT; - if (access_ok(VERIFY_READ, src, 1)) - __do_strncpy_from_user(dst, src, count, res); - return res; -} - - -/* - * Zero Userspace - */ - -#define __do_clear_user(addr,size) \ -do { \ - int __d0; \ - __asm__ __volatile__( \ - "0: rep; stosl\n" \ - " movl %2,%0\n" \ - "1: rep; stosb\n" \ - "2:\n" \ - ".section .fixup,\"ax\"\n" \ - "3: lea 0(%2,%0,4),%0\n" \ - " jmp 2b\n" \ - ".previous\n" \ - ".section __ex_table,\"a\"\n" \ - " .align 4\n" \ - " .long 0b,3b\n" \ - " .long 1b,2b\n" \ - ".previous" \ - : "=&c"(size), "=&D" (__d0) \ - : "r"(size & 3), "0"(size / 4), "1"(addr), "a"(0)); \ -} while (0) - -unsigned long -clear_user(void *to, unsigned long n) -{ - if (access_ok(VERIFY_WRITE, to, n)) - __do_clear_user(to, n); - return n; -} - -unsigned long -__clear_user(void *to, unsigned long n) -{ - __do_clear_user(to, n); - return n; -} - -/* - * Return the size of a string (including the ending 0) - * - * Return 0 on exception, a value greater than N if too long - */ - -long strnlen_user(const char *s, long n) -{ - unsigned long mask = -__addr_ok(s); - unsigned long res, tmp; - - __asm__ __volatile__( - " testl %0, %0\n" - " jz 3f\n" - " andl %0,%%ecx\n" - "0: repne; scasb\n" - " setne %%al\n" - " subl %%ecx,%0\n" - " addl %0,%%eax\n" - "1:\n" - ".section .fixup,\"ax\"\n" - "2: xorl %%eax,%%eax\n" - " jmp 1b\n" - "3: movb $1,%%al\n" - " jmp 1b\n" - ".previous\n" - ".section __ex_table,\"a\"\n" - " .align 4\n" - " .long 0b,2b\n" - ".previous" - :"=r" (n), "=D" (s), "=a" (res), "=c" (tmp) - :"0" (n), "1" (s), "2" (0), "3" (mask) - :"cc"); - return res & mask; -} |