target-i386: correctly propagate retaddr into SVM helpers

Commit 2afbdf8 ("target-i386: exception handling for memory helpers",
2015-09-15) changed tlb_fill's cpu_restore_state+raise_exception_err
to raise_exception_err_ra.  After this change, the cpu_restore_state
and raise_exception_err's cpu_loop_exit are merged into
raise_exception_err_ra's cpu_loop_exit_restore.

This actually fixed some bugs, but when SVM is enabled there is a
second path from raise_exception_err_ra to cpu_loop_exit.  This is
the VMEXIT path, and now cpu_vmexit is called without a
cpu_restore_state before.

The fix is to pass the retaddr to cpu_vmexit (via
cpu_svm_check_intercept_param).  All helpers can now use GETPC() to pass
the correct retaddr, too.

Cc: qemu-stable@nongnu.org
Fixes: 2afbdf84807d673eb682cb78158e11cdacbf4673
Reported-by: Alexander Boettcher <alexander.boettcher@genode-labs.com>
Tested-by: Alexander Boettcher <alexander.boettcher@genode-labs.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/cpu-exec.c b/cpu-exec.c
index b8ebb5ccd6..142a5862fc 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -491,7 +491,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu,
             X86CPU *x86_cpu = X86_CPU(cpu);
             CPUArchState *env = &x86_cpu->env;
             replay_interrupt();
-            cpu_svm_check_intercept_param(env, SVM_EXIT_INIT, 0);
+            cpu_svm_check_intercept_param(env, SVM_EXIT_INIT, 0, 0);
             do_cpu_init(x86_cpu);
             cpu->exception_index = EXCP_HALTED;
             return true;