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NOVA: add single-step support used by gdb

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Fixes #336
This commit is contained in:
Alexander Boettcher 2012-08-23 12:43:19 +02:00 committed by Norman Feske
parent 3b0e4372fe
commit aae3ce348e
6 changed files with 37 additions and 2 deletions
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3
base-nova/include/base/pager.h
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@ -62,6 +62,7 @@ namespace Genode {
addr_t sel_client_ec;
bool valid;
bool dead;
bool singlestep;
} _state;
void _copy_state(Nova::Utcb * utcb);
@ -173,6 +174,8 @@ namespace Genode {
uint8_t client_recall();
void client_set_ec(addr_t ec) { _state.sel_client_ec = ec; }
void single_step(bool on) { _state.singlestep = on; }
};

13
base-nova/src/base/pager/pager.cc
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@ -124,8 +124,18 @@ void Pager_object::_recall_handler()
obj->_state.valid = false;
bool singlestep_state = obj->_state.thread.eflags & 0x100UL;
if (obj->_state.singlestep && !singlestep_state) {
utcb->flags = obj->_state.thread.eflags | 0x100UL;
utcb->mtd = Nova::Mtd(Mtd::EFL).value();
} else
if (!obj->_state.singlestep && singlestep_state) {
utcb->flags = obj->_state.thread.eflags & ~0x100UL;
utcb->mtd = Nova::Mtd(Mtd::EFL).value();
} else
utcb->mtd = 0;
utcb->set_msg_word(0);
utcb->mtd = 0;
reply(myself->stack_top());
}
@ -201,6 +211,7 @@ Pager_object::Pager_object(unsigned long badge)
_sm_state_notify = cap_selector_allocator()->alloc();
_state.valid = false;
_state.dead = false;
_state.singlestep = false;
_state.sel_client_ec = Native_thread::INVALID_INDEX;
/* Create portal for exception handlers 0x0 - 0xd */

14
base-nova/src/core/cpu_session_extension.cc
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@ -23,7 +23,7 @@ Native_capability
Cpu_session_component::native_cap(Thread_capability thread_cap)
{
Cpu_thread_component *thread = _lookup_thread(thread_cap);
if (!thread)
if (!thread || !thread->platform_thread())
return Native_capability::invalid_cap();
return thread->platform_thread()->native_cap();
@ -38,3 +38,15 @@ Cpu_session_component::pause_sync(Thread_capability target_thread_cap)
return thread->platform_thread()->pause();
}
void
Cpu_session_component::single_step(Thread_capability thread_cap, bool enable)
{
using namespace Genode;
Cpu_thread_component *thread = _lookup_thread(thread_cap);
if (!thread || !thread->platform_thread())
return;
thread->platform_thread()->single_step(enable);
}

1
base-nova/src/core/include/cpu_session_component.h
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@ -137,6 +137,7 @@ namespace Genode {
int start(Thread_capability, addr_t, addr_t);
void pause(Thread_capability thread_cap);
void resume(Thread_capability thread_cap);
void single_step(Thread_capability thread_cap, bool enable);
void cancel_blocking(Thread_capability);
int name(Thread_capability, char *, size_t);
int state(Thread_capability, Thread_state *);

2
base-nova/src/core/include/platform_thread.h
View File

@ -152,6 +152,8 @@ namespace Genode {
_sel_ec(), Obj_crd::RIGHT_EC_RECALL);
}
void single_step(bool on);
};
}

6
base-nova/src/core/platform_thread.cc
View File

@ -294,6 +294,12 @@ void Platform_thread::cancel_blocking()
_pager->client_cancel_blocking();
}
void Platform_thread::single_step(bool on)
{
if (!_pager) return;
_pager->single_step(on);
}
unsigned long Platform_thread::pager_object_badge() const
{