arm64: User access library functions

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This patch add support for various user access functions. These
functions use the standard LDR/STR instructions and not the LDRT/STRT
variants in order to allow kernel addresses (after set_fs(KERNEL_DS)).

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>

...

This commit is contained in:

Catalin Marinas 2012-03-05 11:49:32 +00:00

parent 2c020ed8d1

commit 0aea86a217

7 changed files with 642 additions and 0 deletions

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297

arch/arm64/include/asm/uaccess.h

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58

arch/arm64/lib/clear_user.S

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66

arch/arm64/lib/copy_from_user.S

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63

arch/arm64/lib/copy_in_user.S

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61

arch/arm64/lib/copy_to_user.S

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50

arch/arm64/lib/strncpy_from_user.S

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47

arch/arm64/lib/strnlen_user.S

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