[PATCH v9 05/24] arm64: ptrace: Use constants for compat register numbers

[Steffen Eiden <seiden@linux.ibm.com>]

Define an enum to determine the register number for the mapping from
AArch32 and AArch64 registers. This allows for a more flexible use of
the register mappings.

Reviewed-by: Marc Zyngier <maz@kernel.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
---
 arch/arm64/include/asm/ptrace.h | 60 ++++++++++++++++++++++-----------
 1 file changed, 41 insertions(+), 19 deletions(-)

diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h
index f7dc5fb9427d..49a83a0636b9 100644
--- a/arch/arm64/include/asm/ptrace.h
+++ b/arch/arm64/include/asm/ptrace.h
@@ -102,26 +102,48 @@
 #define COMPAT_USER_SZ	296
 
 /* Architecturally defined mapping between AArch32 and AArch64 registers */
+enum {
+	__compat_fp		= 11,
+	__compat_sp		= 13,
+	__compat_lr		= 14,
+	__compat_sp_hyp		= 15,
+	__compat_lr_irq		= 16,
+	__compat_sp_irq		= 17,
+	__compat_lr_svc		= 18,
+	__compat_sp_svc		= 19,
+	__compat_lr_abt		= 20,
+	__compat_sp_abt		= 21,
+	__compat_lr_und		= 22,
+	__compat_sp_und		= 23,
+	__compat_r8_fiq		= 24,
+	__compat_r9_fiq		= 25,
+	__compat_r10_fiq	= 26,
+	__compat_r11_fiq	= 27,
+	__compat_r12_fiq	= 28,
+	__compat_sp_fiq		= 29,
+	__compat_lr_fiq		= 30,
+};
+
 #define compat_usr(x)	regs[(x)]
-#define compat_fp	regs[11]
-#define compat_sp	regs[13]
-#define compat_lr	regs[14]
-#define compat_sp_hyp	regs[15]
-#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]
-#define compat_r11_fiq	regs[27]
-#define compat_r12_fiq	regs[28]
-#define compat_sp_fiq	regs[29]
-#define compat_lr_fiq	regs[30]
+#define compat_fp	regs[__compat_fp]
+#define compat_sp	regs[__compat_sp]
+#define compat_lr	regs[__compat_lr]
+#define compat_sp_hyp	regs[__compat_sp_hyp]
+#define compat_lr_irq	regs[__compat_lr_irq]
+#define compat_sp_irq	regs[__compat_sp_irq]
+#define compat_lr_svc	regs[__compat_lr_svc]
+#define compat_sp_svc	regs[__compat_sp_svc]
+#define compat_lr_abt	regs[__compat_lr_abt]
+#define compat_sp_abt	regs[__compat_sp_abt]
+#define compat_lr_und	regs[__compat_lr_und]
+#define compat_sp_und	regs[__compat_sp_und]
+#define compat_r8_fiq	regs[__compat_r8_fiq]
+#define compat_r9_fiq	regs[__compat_r9_fiq]
+#define compat_r10_fiq	regs[__compat_r10_fiq]
+#define compat_r11_fiq	regs[__compat_r11_fiq]
+#define compat_r12_fiq	regs[__compat_r12_fiq]
+#define compat_sp_fiq	regs[__compat_sp_fiq]
+#define compat_lr_fiq	regs[__compat_lr_fiq]
 
 static inline unsigned long compat_psr_to_pstate(const unsigned long psr)
 {
-- 
2.53.0