diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-09-21 12:11:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-09-21 12:11:52 -0700 |
| commit | dae0af783ddce6d4f6f3d09ee8d71cc8c92c8d9f (patch) | |
| tree | c1bd322d02897fa43cf7304bb5811b1b814a8ecb /arch/arm/lib/getuser.S | |
| parent | c1f03b486429633597bccbee413fb621b53603a8 (diff) | |
| parent | 505013bc9065391f09a51d51cd3bf0b06dfb570a (diff) | |
Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
"Fixes for ARM, the most notable being the fix from Nathan Lynch to fix
the state of various registers during execve, to ensure that data
can't be leaked between two executables.
Fixes from Victor Kamensky for get_user() on big endian platforms,
since the addition of 8-byte get_user() support broke these fairly
badly.
A fix from Sudeep Holla for affinity setting when hotplugging CPU 0.
A fix from Stephen Boyd for a perf-induced sleep attempt while atomic.
Lastly, a correctness fix for emulation of the SWP instruction on
ARMv7+, and a fix for wrong carry handling when updating the
translation table base address on LPAE platforms"
* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
ARM: 8149/1: perf: Don't sleep while atomic when enabling per-cpu interrupts
ARM: 8148/1: flush TLS and thumbee register state during exec
ARM: 8151/1: add missing exports for asm functions required by get_user macro
ARM: 8137/1: fix get_user BE behavior for target variable with size of 8 bytes
ARM: 8135/1: Fix in-correct barrier usage in SWP{B} emulation
ARM: 8133/1: use irq_set_affinity with force=false when migrating irqs
ARM: 8132/1: LPAE: drop wrong carry flag correction after adding TTBR1_OFFSET
Diffstat (limited to 'arch/arm/lib/getuser.S')
| -rw-r--r-- | arch/arm/lib/getuser.S | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/arch/arm/lib/getuser.S b/arch/arm/lib/getuser.S index 938600098b8..8ecfd15c3a0 100644 --- a/arch/arm/lib/getuser.S +++ b/arch/arm/lib/getuser.S @@ -80,7 +80,7 @@ ENTRY(__get_user_8) ENDPROC(__get_user_8) #ifdef __ARMEB__ -ENTRY(__get_user_lo8) +ENTRY(__get_user_32t_8) check_uaccess r0, 8, r1, r2, __get_user_bad #ifdef CONFIG_CPU_USE_DOMAINS add r0, r0, #4 @@ -90,7 +90,37 @@ ENTRY(__get_user_lo8) #endif mov r0, #0 ret lr -ENDPROC(__get_user_lo8) +ENDPROC(__get_user_32t_8) + +ENTRY(__get_user_64t_1) + check_uaccess r0, 1, r1, r2, __get_user_bad8 +8: TUSER(ldrb) r3, [r0] + mov r0, #0 + ret lr +ENDPROC(__get_user_64t_1) + +ENTRY(__get_user_64t_2) + check_uaccess r0, 2, r1, r2, __get_user_bad8 +#ifdef CONFIG_CPU_USE_DOMAINS +rb .req ip +9: ldrbt r3, [r0], #1 +10: ldrbt rb, [r0], #0 +#else +rb .req r0 +9: ldrb r3, [r0] +10: ldrb rb, [r0, #1] +#endif + orr r3, rb, r3, lsl #8 + mov r0, #0 + ret lr +ENDPROC(__get_user_64t_2) + +ENTRY(__get_user_64t_4) + check_uaccess r0, 4, r1, r2, __get_user_bad8 +11: TUSER(ldr) r3, [r0] + mov r0, #0 + ret lr +ENDPROC(__get_user_64t_4) #endif __get_user_bad8: @@ -111,5 +141,9 @@ ENDPROC(__get_user_bad8) .long 6b, __get_user_bad8 #ifdef __ARMEB__ .long 7b, __get_user_bad + .long 8b, __get_user_bad8 + .long 9b, __get_user_bad8 + .long 10b, __get_user_bad8 + .long 11b, __get_user_bad8 #endif .popsection |