cpu: Add CPUArchState pointer to CPUState

The target-specific ENV_GET_CPU() macros have allowed us to navigate
from CPUArchState to CPUState. The reverse direction was not supported.
Avoid introducing CPU_GET_ENV() macros by initializing an untyped
pointer that is initialized in derived instance_init functions.

The field may not be called "env" due to it being poisoned.

Acked-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andreas Färber <afaerber@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/target-alpha/cpu.c b/target-alpha/cpu.c
index 0cdae69..cec9989 100644
--- a/target-alpha/cpu.c
+++ b/target-alpha/cpu.c
@@ -233,9 +233,11 @@ static const TypeInfo ev68_cpu_type_info = {
 
 static void alpha_cpu_initfn(Object *obj)
 {
+    CPUState *cs = CPU(obj);
     AlphaCPU *cpu = ALPHA_CPU(obj);
     CPUAlphaState *env = &cpu->env;
 
+    cs->env_ptr = env;
     cpu_exec_init(env);
     tlb_flush(env, 1);