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| author | Chris Metcalf <cmetcalf@tilera.com> | 2012-06-16 16:53:06 -0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2012-06-16 16:56:13 -0400 |
| commit | 6699c8cda36f296e315068ed9bbe4f03e6ed4044 (patch) | |
| tree | 5efaceb0e8cae2fee56c751e53c716b7859d0a13 /arch/tile/include | |
| parent | cfaf025112d3856637ff34a767ef785ef5cf2ca9 (diff) | |
| download | blackbird-op-linux-6699c8cda36f296e315068ed9bbe4f03e6ed4044.tar.gz blackbird-op-linux-6699c8cda36f296e315068ed9bbe4f03e6ed4044.zip | |
tile: fix bug in get_user() for 4-byte values
The definition of 32-bit values in the 64-bit tilegx architecture is that
they should be sign-extended regardless of whether they are considered
signed or unsigned by the compiler. Accordingly, we need to use an
"ld4s" rather than "ld4u" to load and sign-extend for get_user().
This fixes glibc bug 14238 (see http://sourceware.org/bugzilla),
introduced during the 3.5 merge window.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/include')
| -rw-r--r-- | arch/tile/include/asm/uaccess.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/tile/include/asm/uaccess.h b/arch/tile/include/asm/uaccess.h index c3dd275f25e2..9ab078a4605d 100644 --- a/arch/tile/include/asm/uaccess.h +++ b/arch/tile/include/asm/uaccess.h @@ -146,7 +146,7 @@ extern int fixup_exception(struct pt_regs *regs); #ifdef __tilegx__ #define __get_user_1(x, ptr, ret) __get_user_asm(ld1u, x, ptr, ret) #define __get_user_2(x, ptr, ret) __get_user_asm(ld2u, x, ptr, ret) -#define __get_user_4(x, ptr, ret) __get_user_asm(ld4u, x, ptr, ret) +#define __get_user_4(x, ptr, ret) __get_user_asm(ld4s, x, ptr, ret) #define __get_user_8(x, ptr, ret) __get_user_asm(ld, x, ptr, ret) #else #define __get_user_1(x, ptr, ret) __get_user_asm(lb_u, x, ptr, ret) |
