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kern: add hardware single step extension

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Michael Scire 2021-07-27 05:34:40 -07:00 • committed by SciresM
parent 904ab19823
commit 4075d24e0c
10 changed files with 226 additions and 4 deletions
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5
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_assembly_offsets.h
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@ -14,6 +14,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <mesosphere/kern_build_config.hpp>
/* TODO: Different header for this? */
#define AMS_KERN_NUM_SUPERVISOR_CALLS 0xC0
@ -30,6 +31,10 @@
#define THREAD_STACK_PARAMETERS_IS_IN_EXCEPTION_HANDLER 0x2D
#define THREAD_STACK_PARAMETERS_IS_PINNED 0x2E
#if defined(MESOSPHERE_ENABLE_HARDWARE_SINGLE_STEP)
#define THREAD_STACK_PARAMETERS_IS_SINGLE_STEP 0x2F
#endif
/* ams::kern::arch::arm64::KThreadContext, https://github.com/Atmosphere-NX/Atmosphere/blob/master/libraries/libmesosphere/include/mesosphere/arch/arm64/kern_k_thread_context.hpp */
#define THREAD_CONTEXT_SIZE 0x290
#define THREAD_CONTEXT_CPU_REGISTERS 0x000

1
libraries/libmesosphere/include/mesosphere/kern_build_config.hpp
View file

@ -31,3 +31,4 @@
//#define MESOSPHERE_BUILD_FOR_TRACING
#define MESOSPHERE_ENABLE_PANIC_REGISTER_DUMP
#define MESOSPHERE_ENABLE_HARDWARE_SINGLE_STEP

26
libraries/libmesosphere/include/mesosphere/kern_k_thread.hpp
View file

@ -92,6 +92,9 @@ namespace ams::kern {
bool is_calling_svc;
bool is_in_exception_handler;
bool is_pinned;
#if defined(MESOSPHERE_ENABLE_HARDWARE_SINGLE_STEP)
bool is_single_step;
#endif
};
static_assert(alignof(StackParameters) == 0x10);
static_assert(sizeof(StackParameters) == THREAD_STACK_PARAMETERS_SIZE);
@ -106,6 +109,10 @@ namespace ams::kern {
static_assert(__builtin_offsetof(StackParameters, is_in_exception_handler) == THREAD_STACK_PARAMETERS_IS_IN_EXCEPTION_HANDLER);
static_assert(__builtin_offsetof(StackParameters, is_pinned) == THREAD_STACK_PARAMETERS_IS_PINNED);
#if defined(MESOSPHERE_ENABLE_HARDWARE_SINGLE_STEP)
static_assert(__builtin_offsetof(StackParameters, is_single_step) == THREAD_STACK_PARAMETERS_IS_SINGLE_STEP);
#endif
struct QueueEntry {
private:
KThread *m_prev;
@ -325,6 +332,25 @@ namespace ams::kern {
return this->GetStackParameters().current_svc_id;
}
#if defined(MESOSPHERE_ENABLE_HARDWARE_SINGLE_STEP)
ALWAYS_INLINE void SetSingleStep() {
MESOSPHERE_ASSERT_THIS();
this->GetStackParameters().is_single_step = true;
}
ALWAYS_INLINE void ClearSingleStep() {
MESOSPHERE_ASSERT_THIS();
this->GetStackParameters().is_single_step = false;
}
ALWAYS_INLINE bool IsSingleStep() const {
MESOSPHERE_ASSERT_THIS();
return this->GetStackParameters().is_single_step;
}
#endif
ALWAYS_INLINE void RegisterDpc(DpcFlag flag) {
this->GetStackParameters().dpc_flags.fetch_or(flag);
}