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Date: Tue, 5 Jan 2016 18:46:21 +0100 From: Jiri Slaby <jslaby@...e.cz> To: stable@...r.kernel.org Cc: linux-kernel@...r.kernel.org, Robin Murphy <robin.murphy@....com>, Catalin Marinas <catalin.marinas@....com>, Jiri Slaby <jslaby@...e.cz> Subject: [PATCH 3.12 37/91] arm64: Fix compat register mappings From: Robin Murphy <robin.murphy@....com> 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit 5accd17d0eb523350c9ef754d655e379c9bb93b3 upstream. For reasons not entirely apparent, but now enshrined in history, the architectural mapping of AArch32 banked registers to AArch64 registers actually orders SP_<mode> and LR_<mode> backwards compared to the intuitive r13/r14 order, for all modes except FIQ. Fix the compat_<reg>_<mode> macros accordingly, in the hope of avoiding subtle bugs with KVM and AArch32 guests. Signed-off-by: Robin Murphy <robin.murphy@....com> Acked-by: Will Deacon <will.deacon@....com> Signed-off-by: Catalin Marinas <catalin.marinas@....com> Signed-off-by: Jiri Slaby <jslaby@...e.cz> --- arch/arm64/include/asm/ptrace.h | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h index 0dacbbf9458b..124cba11e108 100644 --- a/arch/arm64/include/asm/ptrace.h +++ b/arch/arm64/include/asm/ptrace.h @@ -70,14 +70,14 @@ #define compat_sp regs[13] #define compat_lr regs[14] #define compat_sp_hyp regs[15] -#define compat_sp_irq regs[16] -#define compat_lr_irq regs[17] -#define compat_sp_svc regs[18] -#define compat_lr_svc regs[19] -#define compat_sp_abt regs[20] -#define compat_lr_abt regs[21] -#define compat_sp_und regs[22] -#define compat_lr_und regs[23] +#define compat_lr_irq regs[16] +#define compat_sp_irq regs[17] +#define compat_lr_svc regs[18] +#define compat_sp_svc regs[19] +#define compat_lr_abt regs[20] +#define compat_sp_abt regs[21] +#define compat_lr_und regs[22] +#define compat_sp_und regs[23] #define compat_r8_fiq regs[24] #define compat_r9_fiq regs[25] #define compat_r10_fiq regs[26] -- 2.6.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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