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microblaze: uaccess: fix put_user and get_user macros

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Use FIXUP macros and resort them.

Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek 2010-03-22 15:25:12 +01:00
parent c77a9c4bb7
commit 8b651aa4a7
1 changed files with 49 additions and 51 deletions
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100
arch/microblaze/include/asm/uaccess.h
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@ -197,16 +197,22 @@ extern long strnlen_user(const char *src, long count);
* already performed before the finction (macro) is called.
*/
#define get_user(x, ptr) \
({ \
access_ok(VERIFY_READ, (ptr), sizeof(*(ptr))) \
? __get_user((x), (ptr)) : -EFAULT; \
})
#define put_user(x, ptr) \
({ \
access_ok(VERIFY_WRITE, (ptr), sizeof(*(ptr))) \
? __put_user((x), (ptr)) : -EFAULT; \
#define __get_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \
({ \
__asm__ __volatile__ ( \
"1:" insn " %1, %2, r0;" \
" addk %0, r0, r0;" \
"2: " \
__FIXUP_SECTION \
"3: brid 2b; " \
" addik %0, r0, %3;" \
".previous;" \
__EX_TABLE_SECTION \
".word 1b,3b;" \
".previous;" \
: "=&r"(__gu_err), "=r"(__gu_val) \
: "r"(__gu_ptr), "i"(-EFAULT) \
); \
})
#define __get_user(x, ptr) \
@ -231,24 +237,49 @@ extern long strnlen_user(const char *src, long count);
__gu_err; \
})
#define __get_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \
#define get_user(x, ptr) \
({ \
access_ok(VERIFY_READ, (ptr), sizeof(*(ptr))) \
? __get_user((x), (ptr)) : -EFAULT; \
})
#define __put_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \
({ \
__asm__ __volatile__ ( \
"1:" insn " %1, %2, r0;" \
" addk %0, r0, r0;" \
"2: " \
__FIXUP_SECTION \
"3: brid 2b; " \
"3: brid 2b;" \
" addik %0, r0, %3;" \
".previous;" \
__EX_TABLE_SECTION \
".word 1b,3b;" \
".previous;" \
: "=&r"(__gu_err), "=r"(__gu_val) \
: "r"(__gu_ptr), "i"(-EFAULT) \
: "=&r"(__gu_err) \
: "r"(__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \
); \
})
#define __put_user_asm_8(__gu_ptr, __gu_val, __gu_err) \
({ \
__asm__ __volatile__ (" lwi %0, %1, 0;" \
"1: swi %0, %2, 0;" \
" lwi %0, %1, 4;" \
"2: swi %0, %2, 4;" \
" addk %0, r0, r0;" \
"3: " \
__FIXUP_SECTION \
"4: brid 3b;" \
" addik %0, r0, %3;" \
".previous;" \
__EX_TABLE_SECTION \
".word 1b,4b,2b,4b;" \
".previous;" \
: "=&r"(__gu_err) \
: "r"(&__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \
); \
})
#define __put_user(x, ptr) \
({ \
@ -273,43 +304,10 @@ extern long strnlen_user(const char *src, long count);
__gu_err; \
})
#define __put_user_asm_8(__gu_ptr, __gu_val, __gu_err) \
({ \
__asm__ __volatile__ (" lwi %0, %1, 0; \
1: swi %0, %2, 0; \
lwi %0, %1, 4; \
2: swi %0, %2, 4; \
addk %0,r0,r0; \
3: \
.section .fixup,\"ax\"; \
4: brid 3b; \
addik %0, r0, %3; \
.previous; \
.section __ex_table,\"a\"; \
.word 1b,4b,2b,4b; \
.previous;" \
: "=&r"(__gu_err) \
: "r"(&__gu_val), \
"r"(__gu_ptr), "i"(-EFAULT) \
); \
})
#define __put_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \
({ \
__asm__ __volatile__ ( \
"1:" insn " %1, %2, r0; \
addk %0, r0, r0; \
2: \
.section .fixup,\"ax\"; \
3: brid 2b; \
addik %0, r0, %3; \
.previous; \
.section __ex_table,\"a\"; \
.word 1b,3b; \
.previous;" \
: "=r"(__gu_err) \
: "r"(__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \
); \
#define put_user(x, ptr) \
({ \
access_ok(VERIFY_WRITE, (ptr), sizeof(*(ptr))) \
? __put_user((x), (ptr)) : -EFAULT; \
})
/* Return: number of not copied bytes, i.e. 0 if OK or non-zero if fail. */