diff --git a/libguile/vm-engine.h b/libguile/vm-engine.h index 370a42b15..c86307c86 100644 --- a/libguile/vm-engine.h +++ b/libguile/vm-engine.h @@ -132,6 +132,7 @@ ip = vp->ip; \ sp = vp->sp; \ fp = vp->fp; \ + stack_base = fp ? SCM_FRAME_UPPER_ADDRESS (fp) - 1 : vp->stack_base; \ } #define SYNC_REGISTER() \ diff --git a/libguile/vm-i-system.c b/libguile/vm-i-system.c index 546891169..aff8331e9 100644 --- a/libguile/vm-i-system.c +++ b/libguile/vm-i-system.c @@ -670,7 +670,27 @@ VM_DEFINE_INSTRUCTION (return, "return", 0, 0, 1) vm_return: EXIT_HOOK (); RETURN_HOOK (); - FREE_FRAME (); + { + SCM ret, *data; + data = SCM_FRAME_DATA_ADDRESS (fp); + + POP (ret); +#ifdef THE_GOVERNMENT_IS_AFTER_ME + if (sp != stack_base) + abort (); + if (stack_base != data + 3) + abort (); +#endif + + /* Restore registers */ + sp = SCM_FRAME_LOWER_ADDRESS (fp); + ip = SCM_FRAME_BYTE_CAST (data[3]); + fp = SCM_FRAME_STACK_CAST (data[2]); + stack_base = SCM_FRAME_UPPER_ADDRESS (fp) - 1; + + /* Set return value (sp is already pushed) */ + *sp = ret; + } /* Restore the last program */ program = SCM_FRAME_PROGRAM (fp);