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nova: breakpoint handling

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If no one is registered for a breakpoint trap - stop the thread. E.g. used
by virtualbox assertion implementation.
This commit is contained in:
Alexander Boettcher 2015-01-06 14:20:16 +01:00 committed by Christian Helmuth
parent 9a4a0448be
commit e5b509cabb
1 changed files with 9 additions and 1 deletions
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10
repos/base-nova/src/base/pager/pager.cc
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@ -101,6 +101,7 @@ void Pager_object::_exception_handler(addr_t portal_id)
Utcb *utcb = _check_handler(myself, obj); Utcb *utcb = _check_handler(myself, obj);
addr_t fault_ip = utcb->ip; addr_t fault_ip = utcb->ip;
uint8_t res = 0xFF; uint8_t res = 0xFF;
addr_t mtd = 0;
if (obj->submit_exception_signal()) if (obj->submit_exception_signal())
res = obj->client_recall(); res = obj->client_recall();
@ -117,10 +118,17 @@ void Pager_object::_exception_handler(addr_t portal_id)
Nova::revoke(Obj_crd(portal_id, 0)); Nova::revoke(Obj_crd(portal_id, 0));
obj->_state.mark_dead(); obj->_state.mark_dead();
enum { TRAP_BREAKPOINT = 3 };
if ((portal_id & 0x1f) == TRAP_BREAKPOINT) {
utcb->ip = fault_ip - 1;
mtd = Mtd::EIP;
}
} }
utcb->set_msg_word(0); utcb->set_msg_word(0);
utcb->mtd = 0; utcb->mtd = mtd;
reply(myself->stack_top()); reply(myself->stack_top());
} }