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| author |   Luc Van Oostenryck <luc.vanoostenryck@gmail.com> | 2017-06-28 16:55:52 +0200 |
|---|---|---|
| committer |   Will Deacon <will.deacon@arm.com> | 2017-06-29 11:02:41 +0100 |
| commit | a5018b0e6f036a598e55371e9135e287dc3b25e5 (patch) | |
| tree | c82e2ea54b3216b940a861428d450c979fe11ae7 /arch/arm64 | |
| parent | ras: mark stub functions as 'inline' (diff) | |
| download | linux-dev-a5018b0e6f036a598e55371e9135e287dc3b25e5.tar.xz linux-dev-a5018b0e6f036a598e55371e9135e287dc3b25e5.zip | |
arm64: fix endianness annotation for debug-monitors.c
Here we're reading thumb or ARM instructions, which are always
stored in memory in little-endian order. These values are thus
correctly converted to native order but the intermediate value
should be annotated as for little-endian values.
Fix this by declaring the intermediate var as __le32 or __le16.
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/kernel/debug-monitors.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c index d618e25c3de1..c7ef99904934 100644 --- a/arch/arm64/kernel/debug-monitors.c +++ b/arch/arm64/kernel/debug-monitors.c @@ -341,20 +341,22 @@ int aarch32_break_handler(struct pt_regs *regs) if (compat_thumb_mode(regs)) { /* get 16-bit Thumb instruction */ - get_user(thumb_instr, (u16 __user *)pc); - thumb_instr = le16_to_cpu(thumb_instr); + __le16 instr; + get_user(instr, (__le16 __user *)pc); + thumb_instr = le16_to_cpu(instr); if (thumb_instr == AARCH32_BREAK_THUMB2_LO) { /* get second half of 32-bit Thumb-2 instruction */ - get_user(thumb_instr, (u16 __user *)(pc + 2)); - thumb_instr = le16_to_cpu(thumb_instr); + get_user(instr, (__le16 __user *)(pc + 2)); + thumb_instr = le16_to_cpu(instr); bp = thumb_instr == AARCH32_BREAK_THUMB2_HI; } else { bp = thumb_instr == AARCH32_BREAK_THUMB; } } else { /* 32-bit ARM instruction */ - get_user(arm_instr, (u32 __user *)pc); - arm_instr = le32_to_cpu(arm_instr); + __le32 instr; + get_user(instr, (__le32 __user *)pc); + arm_instr = le32_to_cpu(instr); bp = (arm_instr & ~0xf0000000) == AARCH32_BREAK_ARM; } |