/* Initializes a dcontext with the supplied state and calls dispatch */
void
dynamo_start(priv_mcontext_t *mc)
{
priv_mcontext_t *mcontext;
dcontext_t *dcontext = get_thread_private_dcontext();
ASSERT(dcontext != NULL);
thread_starting(dcontext);
/* Signal other threads for take over. */
dynamorio_take_over_threads(dcontext);
/* Set return address */
mc->pc = canonicalize_pc_target(dcontext, mc->pc);
dcontext->next_tag = mc->pc;
ASSERT(dcontext->next_tag != NULL);
/* transfer exec state to mcontext */
mcontext = get_mcontext(dcontext);
*mcontext = *mc;
/* clear pc */
mcontext->pc = 0;
DOLOG(2, LOG_TOP, {
byte *cur_esp;
GET_STACK_PTR(cur_esp);
LOG(THREAD, LOG_TOP, 2, "%s: next_tag="PFX", cur xsp="PFX", mc->xsp="PFX"\n",
__FUNCTION__, dcontext->next_tag, cur_esp, mc->xsp);
});
/* Initializes a dcontext with the supplied state and calls dispatch */
void
dynamo_start(priv_mcontext_t *mc)
{
priv_mcontext_t *mcontext;
dcontext_t *dcontext = get_thread_private_dcontext();
ASSERT(dcontext != NULL);
thread_starting(dcontext);
/* Signal other threads for take over. */
dynamorio_take_over_threads(dcontext);
/* Set return address */
dcontext->next_tag = mc->pc;
ASSERT(dcontext->next_tag != NULL);
/* transfer exec state to mcontext */
mcontext = get_mcontext(dcontext);
*mcontext = *mc;
/* clear pc */
mcontext->pc = 0;
/* Swap stacks so dispatch is invoked outside the application.
* We begin interpretation at the application return point,
* and thus we need to look like DR returned -- adjust the app
* stack to account for the return address.
*/
mcontext->xsp += XSP_SZ;
call_switch_stack(dcontext, dcontext->dstack, dispatch,
false/*not on initstack*/, true/*return on error*/);
/* In release builds, this will simply return and continue native
* execution. That's better than calling unexpected_return() which
* goes into an infinite loop.
*/
ASSERT_NOT_REACHED();
}
