Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 389 insertions, 0 deletions

diff --git a/include/asm-sparc/uaccess.h b/include/asm-sparc/uaccess.h
new file mode 100644
index 000000000000..3f47889883b7
--- /dev/null
+++ b/include/asm-sparc/uaccess.h
@@ -0,0 +1,389 @@
+/* $Id: uaccess.h,v 1.24 2001/10/30 04:32:24 davem Exp $
+ * uaccess.h: User space memore access functions.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+#ifndef _ASM_UACCESS_H
+#define _ASM_UACCESS_H
+
+#ifdef __KERNEL__
+#include <linux/compiler.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <asm/vac-ops.h>
+#include <asm/a.out.h>
+#endif
+
+#ifndef __ASSEMBLY__
+
+/* Sparc is not segmented, however we need to be able to fool verify_area()
+ * when doing system calls from kernel mode legitimately.
+ *
+ * "For historical reasons, these macros are grossly misnamed." -Linus
+ */
+
+#define KERNEL_DS   ((mm_segment_t) { 0 })
+#define USER_DS     ((mm_segment_t) { -1 })
+
+#define VERIFY_READ     0
+#define VERIFY_WRITE    1
+
+#define get_ds()        (KERNEL_DS)
+#define get_fs()        (current->thread.current_ds)
+#define set_fs(val)     ((current->thread.current_ds) = (val))
+
+#define segment_eq(a,b) ((a).seg == (b).seg)
+
+/* We have there a nice not-mapped page at PAGE_OFFSET - PAGE_SIZE, so that this test
+ * can be fairly lightweight.
+ * No one can read/write anything from userland in the kernel space by setting
+ * large size and address near to PAGE_OFFSET - a fault will break his intentions.
+ */
+#define __user_ok(addr,size) ((addr) < STACK_TOP)
+#define __kernel_ok (segment_eq(get_fs(), KERNEL_DS))
+#define __access_ok(addr,size) (__user_ok((addr) & get_fs().seg,(size)))
+#define access_ok(type,addr,size) __access_ok((unsigned long)(addr),(size))
+
+/* this function will go away soon - use access_ok() instead */
+static inline int __deprecated verify_area(int type, const void __user * addr, unsigned long size)
+{
+        return access_ok(type,addr,size) ? 0 : -EFAULT;
+}
+
+/*
+ * 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.
+ *
+ * There is a special way how to put a range of potentially faulting
+ * insns (like twenty ldd/std's with now intervening other instructions)
+ * You specify address of first in insn and 0 in fixup and in the next
+ * exception_table_entry you specify last potentially faulting insn + 1
+ * and in fixup the routine which should handle the fault.
+ * That fixup code will get
+ * (faulting_insn_address - first_insn_in_the_range_address)/4
+ * in %g2 (ie. index of the faulting instruction in the range).
+ */
+
+struct exception_table_entry
+{
+        unsigned long insn, fixup;
+};
+
+/* Returns 0 if exception not found and fixup otherwise.  */
+extern unsigned long search_extables_range(unsigned long addr, unsigned long *g2);
+
+extern void __ret_efault(void);
+
+/* Uh, these should become the main single-value transfer routines..
+ * They automatically use the right size if we just have the right
+ * pointer type..
+ *
+ * This gets kind of ugly. We want to return _two_ values in "get_user()"
+ * and yet we don't want to do any pointers, because that is too much
+ * of a performance impact. Thus we have a few rather ugly macros here,
+ * and hide all the ugliness from the user.
+ */
+#define put_user(x,ptr) ({ \
+unsigned long __pu_addr = (unsigned long)(ptr); \
+__chk_user_ptr(ptr); \
+__put_user_check((__typeof__(*(ptr)))(x),__pu_addr,sizeof(*(ptr))); })
+
+#define get_user(x,ptr) ({ \
+unsigned long __gu_addr = (unsigned long)(ptr); \
+__chk_user_ptr(ptr); \
+__get_user_check((x),__gu_addr,sizeof(*(ptr)),__typeof__(*(ptr))); })
+
+/*
+ * The "__xxx" versions do not do address space checking, useful when
+ * doing multiple accesses to the same area (the user has to do the
+ * checks by hand with "access_ok()")
+ */
+#define __put_user(x,ptr) __put_user_nocheck((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
+#define __get_user(x,ptr) __get_user_nocheck((x),(ptr),sizeof(*(ptr)),__typeof__(*(ptr)))
+
+struct __large_struct { unsigned long buf[100]; };
+#define __m(x) ((struct __large_struct __user *)(x))
+
+#define __put_user_check(x,addr,size) ({ \
+register int __pu_ret; \
+if (__access_ok(addr,size)) { \
+switch (size) { \
+case 1: __put_user_asm(x,b,addr,__pu_ret); break; \
+case 2: __put_user_asm(x,h,addr,__pu_ret); break; \
+case 4: __put_user_asm(x,,addr,__pu_ret); break; \
+case 8: __put_user_asm(x,d,addr,__pu_ret); break; \
+default: __pu_ret = __put_user_bad(); break; \
+} } else { __pu_ret = -EFAULT; } __pu_ret; })
+
+#define __put_user_check_ret(x,addr,size,retval) ({ \
+register int __foo __asm__ ("l1"); \
+if (__access_ok(addr,size)) { \
+switch (size) { \
+case 1: __put_user_asm_ret(x,b,addr,retval,__foo); break; \
+case 2: __put_user_asm_ret(x,h,addr,retval,__foo); break; \
+case 4: __put_user_asm_ret(x,,addr,retval,__foo); break; \
+case 8: __put_user_asm_ret(x,d,addr,retval,__foo); break; \
+default: if (__put_user_bad()) return retval; break; \
+} } else return retval; })
+
+#define __put_user_nocheck(x,addr,size) ({ \
+register int __pu_ret; \
+switch (size) { \
+case 1: __put_user_asm(x,b,addr,__pu_ret); break; \
+case 2: __put_user_asm(x,h,addr,__pu_ret); break; \
+case 4: __put_user_asm(x,,addr,__pu_ret); break; \
+case 8: __put_user_asm(x,d,addr,__pu_ret); break; \
+default: __pu_ret = __put_user_bad(); break; \
+} __pu_ret; })
+
+#define __put_user_nocheck_ret(x,addr,size,retval) ({ \
+register int __foo __asm__ ("l1"); \
+switch (size) { \
+case 1: __put_user_asm_ret(x,b,addr,retval,__foo); break; \
+case 2: __put_user_asm_ret(x,h,addr,retval,__foo); break; \
+case 4: __put_user_asm_ret(x,,addr,retval,__foo); break; \
+case 8: __put_user_asm_ret(x,d,addr,retval,__foo); break; \
+default: if (__put_user_bad()) return retval; break; \
+} })
+
+#define __put_user_asm(x,size,addr,ret)                                 \
+__asm__ __volatile__(                                                   \
+        "/* Put user asm, inline. */\n"                                 \
+"1:\t"  "st"#size " %1, %2\n\t"                                         \
+        "clr    %0\n"                                                   \
+"2:\n\n\t"                                                              \
+        ".section .fixup,#alloc,#execinstr\n\t"                         \
+        ".align 4\n"                                                    \
+"3:\n\t"                                                                \
+        "b      2b\n\t"                                                 \
+        " mov   %3, %0\n\t"                                             \
+        ".previous\n\n\t"                                               \
+        ".section __ex_table,#alloc\n\t"                                \
+        ".align 4\n\t"                                                  \
+        ".word  1b, 3b\n\t"                                             \
+        ".previous\n\n\t"                                               \
+       : "=&r" (ret) : "r" (x), "m" (*__m(addr)),                       \
+         "i" (-EFAULT))
+
+#define __put_user_asm_ret(x,size,addr,ret,foo)                         \
+if (__builtin_constant_p(ret) && ret == -EFAULT)                        \
+__asm__ __volatile__(                                                   \
+        "/* Put user asm ret, inline. */\n"                             \
+"1:\t"  "st"#size " %1, %2\n\n\t"                                       \
+        ".section __ex_table,#alloc\n\t"                                \
+        ".align 4\n\t"                                                  \
+        ".word  1b, __ret_efault\n\n\t"                                 \
+        ".previous\n\n\t"                                               \
+       : "=r" (foo) : "r" (x), "m" (*__m(addr)));                       \
+else                                                                    \
+__asm__ __volatile(                                                     \
+        "/* Put user asm ret, inline. */\n"                             \
+"1:\t"  "st"#size " %1, %2\n\n\t"                                       \
+        ".section .fixup,#alloc,#execinstr\n\t"                         \
+        ".align 4\n"                                                    \
+"3:\n\t"                                                                \
+        "ret\n\t"                                                       \
+        " restore %%g0, %3, %%o0\n\t"                                   \
+        ".previous\n\n\t"                                               \
+        ".section __ex_table,#alloc\n\t"                                \
+        ".align 4\n\t"                                                  \
+        ".word  1b, 3b\n\n\t"                                           \
+        ".previous\n\n\t"                                               \
+       : "=r" (foo) : "r" (x), "m" (*__m(addr)), "i" (ret))
+
+extern int __put_user_bad(void);
+
+#define __get_user_check(x,addr,size,type) ({ \
+register int __gu_ret; \
+register unsigned long __gu_val; \
+if (__access_ok(addr,size)) { \
+switch (size) { \
+case 1: __get_user_asm(__gu_val,ub,addr,__gu_ret); break; \
+case 2: __get_user_asm(__gu_val,uh,addr,__gu_ret); break; \
+case 4: __get_user_asm(__gu_val,,addr,__gu_ret); break; \
+case 8: __get_user_asm(__gu_val,d,addr,__gu_ret); break; \
+default: __gu_val = 0; __gu_ret = __get_user_bad(); break; \
+} } else { __gu_val = 0; __gu_ret = -EFAULT; } x = (type) __gu_val; __gu_ret; })
+
+#define __get_user_check_ret(x,addr,size,type,retval) ({ \
+register unsigned long __gu_val __asm__ ("l1"); \
+if (__access_ok(addr,size)) { \
+switch (size) { \
+case 1: __get_user_asm_ret(__gu_val,ub,addr,retval); break; \
+case 2: __get_user_asm_ret(__gu_val,uh,addr,retval); break; \
+case 4: __get_user_asm_ret(__gu_val,,addr,retval); break; \
+case 8: __get_user_asm_ret(__gu_val,d,addr,retval); break; \
+default: if (__get_user_bad()) return retval; \
+} x = (type) __gu_val; } else return retval; })
+
+#define __get_user_nocheck(x,addr,size,type) ({ \
+register int __gu_ret; \
+register unsigned long __gu_val; \
+switch (size) { \
+case 1: __get_user_asm(__gu_val,ub,addr,__gu_ret); break; \
+case 2: __get_user_asm(__gu_val,uh,addr,__gu_ret); break; \
+case 4: __get_user_asm(__gu_val,,addr,__gu_ret); break; \
+case 8: __get_user_asm(__gu_val,d,addr,__gu_ret); break; \
+default: __gu_val = 0; __gu_ret = __get_user_bad(); break; \
+} x = (type) __gu_val; __gu_ret; })
+
+#define __get_user_nocheck_ret(x,addr,size,type,retval) ({ \
+register unsigned long __gu_val __asm__ ("l1"); \
+switch (size) { \
+case 1: __get_user_asm_ret(__gu_val,ub,addr,retval); break; \
+case 2: __get_user_asm_ret(__gu_val,uh,addr,retval); break; \
+case 4: __get_user_asm_ret(__gu_val,,addr,retval); break; \
+case 8: __get_user_asm_ret(__gu_val,d,addr,retval); break; \
+default: if (__get_user_bad()) return retval; \
+} x = (type) __gu_val; })
+
+#define __get_user_asm(x,size,addr,ret)                                 \
+__asm__ __volatile__(                                                   \
+        "/* Get user asm, inline. */\n"                                 \
+"1:\t"  "ld"#size " %2, %1\n\t"                                         \
+        "clr    %0\n"                                                   \
+"2:\n\n\t"                                                              \
+        ".section .fixup,#alloc,#execinstr\n\t"                         \
+        ".align 4\n"                                                    \
+"3:\n\t"                                                                \
+        "clr    %1\n\t"                                                 \
+        "b      2b\n\t"                                                 \
+        " mov   %3, %0\n\n\t"                                           \
+        ".previous\n\t"                                                 \
+        ".section __ex_table,#alloc\n\t"                                \
+        ".align 4\n\t"                                                  \
+        ".word  1b, 3b\n\n\t"                                           \
+        ".previous\n\t"                                                 \
+       : "=&r" (ret), "=&r" (x) : "m" (*__m(addr)),                     \
+         "i" (-EFAULT))
+
+#define __get_user_asm_ret(x,size,addr,retval)                          \
+if (__builtin_constant_p(retval) && retval == -EFAULT)                  \
+__asm__ __volatile__(                                                   \
+        "/* Get user asm ret, inline. */\n"                             \
+"1:\t"  "ld"#size " %1, %0\n\n\t"                                       \
+        ".section __ex_table,#alloc\n\t"                                \
+        ".align 4\n\t"                                                  \
+        ".word  1b,__ret_efault\n\n\t"                                  \
+        ".previous\n\t"                                                 \
+       : "=&r" (x) : "m" (*__m(addr)));                                 \
+else                                                                    \
+__asm__ __volatile__(                                                   \
+        "/* Get user asm ret, inline. */\n"                             \
+"1:\t"  "ld"#size " %1, %0\n\n\t"                                       \
+        ".section .fixup,#alloc,#execinstr\n\t"                         \
+        ".align 4\n"                                                    \
+"3:\n\t"                                                                \
+        "ret\n\t"                                                       \
+        " restore %%g0, %2, %%o0\n\n\t"                                 \
+        ".previous\n\t"                                                 \
+        ".section __ex_table,#alloc\n\t"                                \
+        ".align 4\n\t"                                                  \
+        ".word  1b, 3b\n\n\t"                                           \
+        ".previous\n\t"                                                 \
+       : "=&r" (x) : "m" (*__m(addr)), "i" (retval))
+
+extern int __get_user_bad(void);
+
+extern unsigned long __copy_user(void __user *to, const void __user *from, unsigned long size);
+
+static inline unsigned long copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+        if (n && __access_ok((unsigned long) to, n))
+                return __copy_user(to, (__force void __user *) from, n);
+        else
+                return n;
+}
+
+static inline unsigned long __copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+        return __copy_user(to, (__force void __user *) from, n);
+}
+
+static inline unsigned long copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+        if (n && __access_ok((unsigned long) from, n))
+                return __copy_user((__force void __user *) to, from, n);
+        else
+                return n;
+}
+
+static inline unsigned long __copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+        return __copy_user((__force void __user *) to, from, n);
+}
+
+#define __copy_to_user_inatomic __copy_to_user
+#define __copy_from_user_inatomic __copy_from_user
+
+static inline unsigned long __clear_user(void __user *addr, unsigned long size)
+{
+        unsigned long ret;
+
+        __asm__ __volatile__ (
+                ".section __ex_table,#alloc\n\t"
+                ".align 4\n\t"
+                ".word 1f,3\n\t"
+                ".previous\n\t"
+                "mov %2, %%o1\n"
+                "1:\n\t"
+                "call __bzero\n\t"
+                " mov %1, %%o0\n\t"
+                "mov %%o0, %0\n"
+                : "=r" (ret) : "r" (addr), "r" (size) :
+                "o0", "o1", "o2", "o3", "o4", "o5", "o7",
+                "g1", "g2", "g3", "g4", "g5", "g7", "cc");
+
+        return ret;
+}
+
+static inline unsigned long clear_user(void __user *addr, unsigned long n)
+{
+        if (n && __access_ok((unsigned long) addr, n))
+                return __clear_user(addr, n);
+        else
+                return n;
+}
+
+extern long __strncpy_from_user(char *dest, const char __user *src, long count);
+
+static inline long strncpy_from_user(char *dest, const char __user *src, long count)
+{
+        if (__access_ok((unsigned long) src, count))
+                return __strncpy_from_user(dest, src, count);
+        else
+                return -EFAULT;
+}
+
+extern long __strlen_user(const char __user *);
+extern long __strnlen_user(const char __user *, long len);
+
+static inline long strlen_user(const char __user *str)
+{
+        if (!access_ok(VERIFY_READ, str, 0))
+                return 0;
+        else
+                return __strlen_user(str);
+}
+
+static inline long strnlen_user(const char __user *str, long len)
+{
+        if (!access_ok(VERIFY_READ, str, 0))
+                return 0;
+        else
+                return __strnlen_user(str, len);
+}
+
+#endif  /* __ASSEMBLY__ */
+
+#endif /* _ASM_UACCESS_H */