[Qemu-devel] [PATCH v3 5/9] target-arm: introduce aarch64_compat_sp

[Andrew Jones <drjones@redhat.com>]

Signed-off-by: Andrew Jones <drjones@redhat.com>
---
 target-arm/cpu.h | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index 815fef8a30663..9231a9ff3b9c2 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -863,6 +863,51 @@ enum arm_cpu_mode {
 #define ARM_IWMMXT_wCGR2	10
 #define ARM_IWMMXT_wCGR3	11
 
+/* AArch64 to AArch32 register mappings */
+#define compat_fp_usr   xregs[11]
+#define compat_sp_usr   xregs[13]
+#define compat_lr_usr   xregs[14]
+#define compat_sp_hyp   xregs[15]
+#define compat_lr_irq   xregs[16]
+#define compat_sp_irq   xregs[17]
+#define compat_lr_svc   xregs[18]
+#define compat_sp_svc   xregs[19]
+#define compat_lr_abt   xregs[20]
+#define compat_sp_abt   xregs[21]
+#define compat_lr_und   xregs[22]
+#define compat_sp_und   xregs[23]
+#define compat_r8_fiq   xregs[24]
+#define compat_r9_fiq   xregs[25]
+#define compat_r10_fiq  xregs[26]
+#define compat_r11_fiq  xregs[27]
+#define compat_r12_fiq  xregs[28]
+#define compat_sp_fiq   xregs[29]
+#define compat_lr_fiq   xregs[30]
+
+static inline uint64_t aarch64_compat_sp(CPUARMState *env)
+{
+    uint32_t mode = env->uncached_cpsr & CPSR_M;
+
+    switch (mode) {
+    case ARM_CPU_MODE_USR:
+    case ARM_CPU_MODE_SYS:
+        return env->compat_sp_usr;
+    case ARM_CPU_MODE_FIQ:
+        return env->compat_sp_fiq;
+    case ARM_CPU_MODE_IRQ:
+        return env->compat_sp_irq;
+    case ARM_CPU_MODE_SVC:
+        return env->compat_sp_svc;
+    case ARM_CPU_MODE_ABT:
+        return env->compat_sp_abt;
+    case ARM_CPU_MODE_HYP:
+        return env->compat_sp_hyp;
+    case ARM_CPU_MODE_UND:
+        return env->compat_sp_und;
+    }
+    g_assert_not_reached();
+}
+
 /* If adding a feature bit which corresponds to a Linux ELF
  * HWCAP bit, remember to update the feature-bit-to-hwcap
  * mapping in linux-user/elfload.c:get_elf_hwcap().
-- 
2.4.3