x86_64: add hypercall

panda-re · Jan 30, 2025 · 57f6586 · 57f6586
1 parent c06ba2b
commit 57f6586
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/target/i386/tcg/misc_helper.c b/target/i386/tcg/misc_helper.c
@@ -24,6 +24,8 @@
 #include "exec/exec-all.h"
 #include "helper-tcg.h"
 
+bool panda_callbacks_guest_hypercall(CPUState *env);
+
 /*
  * NOTE: the translator must set DisasContext.cc_op to CC_OP_EFLAGS
  * after generating a call to a helper that uses this.
@@ -53,6 +55,11 @@ void helper_cpuid(CPUX86State *env)
 
     cpu_svm_check_intercept_param(env, SVM_EXIT_CPUID, 0, GETPC());
 
+    if (panda_callbacks_guest_hypercall(env_cpu(env))) {
+        // cpuid processed by one of the callbacks
+        return;
+    }
+
     cpu_x86_cpuid(env, (uint32_t)env->regs[R_EAX], (uint32_t)env->regs[R_ECX],
                   &eax, &ebx, &ecx, &edx);
     env->regs[R_EAX] = eax;