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kern: SendSyncRequestLight, ReplyAndReceiveLight

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This commit is contained in:
Michael Scire 2020-07-29 03:57:40 -07:00 committed by SciresM
parent b6cb561c47
commit 8922bbd108
8 changed files with 360 additions and 14 deletions
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3
libraries/libmesosphere/include/mesosphere/kern_k_light_session.hpp
View file

@ -34,6 +34,9 @@ namespace ams::kern {
ClientClosed = 2,
ServerClosed = 3,
};
public:
static constexpr size_t DataSize = sizeof(u32) * 7;
static constexpr u32 ReplyFlag = (1u << (BITSIZEOF(u32) - 1));
private:
KLightServerSession server;
KLightClientSession client;

3
libraries/libmesosphere/include/mesosphere/kern_k_thread.hpp
View file

@ -410,6 +410,9 @@ namespace ams::kern {
void ClearCancellable() { this->cancellable = false; }
void SetCancellable() { this->cancellable = true; }
constexpr u32 *GetLightSessionData() const { return this->light_ipc_data; }
constexpr void SetLightSessionData(u32 *data) { this->light_ipc_data = data; }
bool HasWaiters() const { return !this->waiter_list.empty(); }
constexpr s64 GetLastScheduledTick() const { return this->last_scheduled_tick; }

156
libraries/libmesosphere/source/arch/arm64/svc/kern_svc_light_ipc_asm.s Normal file
View file

@ -0,0 +1,156 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* ams::kern::svc::CallSendSyncRequestLight64() */
.section .text._ZN3ams4kern3svc26CallSendSyncRequestLight64Ev, "ax", %progbits
.global _ZN3ams4kern3svc26CallSendSyncRequestLight64Ev
.type _ZN3ams4kern3svc26CallSendSyncRequestLight64Ev, %function
_ZN3ams4kern3svc26CallSendSyncRequestLight64Ev:
/* Allocate space for the light ipc data. */
sub sp, sp, #(4 * 8)
/* Store the light ipc data. */
stp w1, w2, [sp, #(4 * 0)]
stp w3, w4, [sp, #(4 * 2)]
stp w5, w6, [sp, #(4 * 4)]
str w7, [sp, #(4 * 6)]
/* Invoke the svc handler. */
mov x1, sp
stp x29, x30, [sp, #-16]!
bl _ZN3ams4kern3svc22SendSyncRequestLight64EjPj
ldp x29, x30, [sp], #16
/* Load the light ipc data. */
ldp w1, w2, [sp, #(4 * 0)]
ldp w3, w4, [sp, #(4 * 2)]
ldp w5, w6, [sp, #(4 * 4)]
ldr w7, [sp, #(4 * 6)]
/* Free the stack space for the light ipc data. */
add sp, sp, #(4 * 8)
ret
/* ams::kern::svc::CallSendSyncRequestLight64From32() */
.section .text._ZN3ams4kern3svc32CallSendSyncRequestLight64From32Ev, "ax", %progbits
.global _ZN3ams4kern3svc32CallSendSyncRequestLight64From32Ev
.type _ZN3ams4kern3svc32CallSendSyncRequestLight64From32Ev, %function
_ZN3ams4kern3svc32CallSendSyncRequestLight64From32Ev:
/* Load x4-x7 from where the svc handler stores them. */
ldp x4, x5, [sp, #(8 * 0)]
ldp x6, x7, [sp, #(8 * 2)]
/* Allocate space for the light ipc data. */
sub sp, sp, #(4 * 8)
/* Store the light ipc data. */
stp w1, w2, [sp, #(4 * 0)]
stp w3, w4, [sp, #(4 * 2)]
stp w5, w6, [sp, #(4 * 4)]
str w7, [sp, #(4 * 6)]
/* Invoke the svc handler. */
mov x1, sp
stp x29, x30, [sp, #-16]!
bl _ZN3ams4kern3svc28SendSyncRequestLight64From32EjPj
ldp x29, x30, [sp], #16
/* Load the light ipc data. */
ldp w1, w2, [sp, #(4 * 0)]
ldp w3, w4, [sp, #(4 * 2)]
ldp w5, w6, [sp, #(4 * 4)]
ldr w7, [sp, #(4 * 6)]
/* Free the stack space for the light ipc data. */
add sp, sp, #(4 * 8)
/* Save x4-x7 to where the svc handler stores them. */
stp x4, x5, [sp, #(8 * 0)]
stp x6, x7, [sp, #(8 * 2)]
ret
/* ams::kern::svc::CallReplyAndReceiveLight64() */
.section .text._ZN3ams4kern3svc26CallReplyAndReceiveLight64Ev, "ax", %progbits
.global _ZN3ams4kern3svc26CallReplyAndReceiveLight64Ev
.type _ZN3ams4kern3svc26CallReplyAndReceiveLight64Ev, %function
_ZN3ams4kern3svc26CallReplyAndReceiveLight64Ev:
/* Allocate space for the light ipc data. */
sub sp, sp, #(4 * 8)
/* Store the light ipc data. */
stp w1, w2, [sp, #(4 * 0)]
stp w3, w4, [sp, #(4 * 2)]
stp w5, w6, [sp, #(4 * 4)]
str w7, [sp, #(4 * 6)]
/* Invoke the svc handler. */
mov x1, sp
stp x29, x30, [sp, #-16]!
bl _ZN3ams4kern3svc22ReplyAndReceiveLight64EjPj
ldp x29, x30, [sp], #16
/* Load the light ipc data. */
ldp w1, w2, [sp, #(4 * 0)]
ldp w3, w4, [sp, #(4 * 2)]
ldp w5, w6, [sp, #(4 * 4)]
ldr w7, [sp, #(4 * 6)]
/* Free the stack space for the light ipc data. */
add sp, sp, #(4 * 8)
ret
/* ams::kern::svc::CallReplyAndReceiveLight64From32() */
.section .text._ZN3ams4kern3svc32CallReplyAndReceiveLight64From32Ev, "ax", %progbits
.global _ZN3ams4kern3svc32CallReplyAndReceiveLight64From32Ev
.type _ZN3ams4kern3svc32CallReplyAndReceiveLight64From32Ev, %function
_ZN3ams4kern3svc32CallReplyAndReceiveLight64From32Ev:
/* Load x4-x7 from where the svc handler stores them. */
ldp x4, x5, [sp, #(8 * 0)]
ldp x6, x7, [sp, #(8 * 2)]
/* Allocate space for the light ipc data. */
sub sp, sp, #(4 * 8)
/* Store the light ipc data. */
stp w1, w2, [sp, #(4 * 0)]
stp w3, w4, [sp, #(4 * 2)]
stp w5, w6, [sp, #(4 * 4)]
str w7, [sp, #(4 * 6)]
/* Invoke the svc handler. */
mov x1, sp
stp x29, x30, [sp, #-16]!
bl _ZN3ams4kern3svc28ReplyAndReceiveLight64From32EjPj
ldp x29, x30, [sp], #16
/* Load the light ipc data. */
ldp w1, w2, [sp, #(4 * 0)]
ldp w3, w4, [sp, #(4 * 2)]
ldp w5, w6, [sp, #(4 * 4)]
ldr w7, [sp, #(4 * 6)]
/* Free the stack space for the light ipc data. */
add sp, sp, #(4 * 8)
/* Save x4-x7 to where the svc handler stores them. */
stp x4, x5, [sp, #(8 * 0)]
stp x6, x7, [sp, #(8 * 2)]
ret

13
libraries/libmesosphere/source/arch/arm64/svc/kern_svc_tables.cpp
View file

@ -22,6 +22,13 @@
namespace ams::kern::svc {
/* Declare special prototypes for the light ipc handlers. */
void CallSendSyncRequestLight64();
void CallSendSyncRequestLight64From32();
void CallReplyAndReceiveLight64();
void CallReplyAndReceiveLight64From32();
namespace {
#ifndef MESOSPHERE_USE_STUBBED_SVC_TABLES
@ -59,6 +66,9 @@ namespace ams::kern::svc {
AMS_SVC_FOREACH_KERN_DEFINITION(AMS_KERN_SVC_SET_TABLE_ENTRY, _)
#undef AMS_KERN_SVC_SET_TABLE_ENTRY
table[svc::SvcId_SendSyncRequestLight] = CallSendSyncRequestLight64From32;
table[svc::SvcId_ReplyAndReceiveLight] = CallReplyAndReceiveLight64From32;
return table;
}();
@ -70,6 +80,9 @@ namespace ams::kern::svc {
AMS_SVC_FOREACH_KERN_DEFINITION(AMS_KERN_SVC_SET_TABLE_ENTRY, _)
#undef AMS_KERN_SVC_SET_TABLE_ENTRY
table[svc::SvcId_SendSyncRequestLight] = CallSendSyncRequestLight64;
table[svc::SvcId_ReplyAndReceiveLight] = CallReplyAndReceiveLight64;
return table;
}();

19
libraries/libmesosphere/source/kern_k_light_client_session.cpp
View file

@ -30,7 +30,24 @@ namespace ams::kern {
Result KLightClientSession::SendSyncRequest(u32 *data) {
MESOSPHERE_ASSERT_THIS();
MESOSPHERE_UNIMPLEMENTED();
/* Get the request thread. */
KThread *cur_thread = GetCurrentThreadPointer();
/* Set the light data. */
cur_thread->SetLightSessionData(data);
/* Send the request. */
{
KScopedSchedulerLock sl;
cur_thread->SetSyncedObject(nullptr, ResultSuccess());
R_TRY(this->parent->OnRequest(cur_thread));
}
/* Get the result. */
KSynchronizationObject *dummy;
return cur_thread->GetWaitResult(std::addressof(dummy));
}
}

140
libraries/libmesosphere/source/kern_k_light_server_session.cpp
View file

@ -27,18 +27,152 @@ namespace ams::kern {
void KLightServerSession::OnClientClosed() {
MESOSPHERE_ASSERT_THIS();
this->CleanupRequests();
}
Result KLightServerSession::OnRequest(KThread *request_thread) {
MESOSPHERE_UNIMPLEMENTED();
MESOSPHERE_ASSERT_THIS();
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
/* Check that the server isn't closed. */
R_UNLESS(!this->parent->IsServerClosed(), svc::ResultSessionClosed());
/* Try to sleep the thread. */
R_UNLESS(this->request_queue.SleepThread(request_thread), svc::ResultTerminationRequested());
/* If we don't have a current request, wake up a server thread to handle it. */
if (this->current_request == nullptr) {
this->server_queue.WakeupFrontThread();
}
return ResultSuccess();
}
Result KLightServerSession::ReplyAndReceive(u32 *data) {
MESOSPHERE_UNIMPLEMENTED();
MESOSPHERE_ASSERT_THIS();
/* Set the server context. */
KThread *server_thread = GetCurrentThreadPointer();
server_thread->SetLightSessionData(data);
/* Reply, if we need to. */
KThread *cur_request = nullptr;
if (data[0] & KLightSession::ReplyFlag) {
KScopedSchedulerLock sl;
/* Check that we're open. */
R_UNLESS(!this->parent->IsClientClosed(), svc::ResultSessionClosed());
R_UNLESS(!this->parent->IsServerClosed(), svc::ResultSessionClosed());
/* Check that we have a request to reply to. */
R_UNLESS(this->current_request != nullptr, svc::ResultInvalidState());
/* Check that the server thread is correct. */
R_UNLESS(this->server_thread == server_thread, svc::ResultInvalidState());
/* If we can reply, do so. */
if (!this->current_request->IsTerminationRequested()) {
MESOSPHERE_ASSERT(this->current_request->GetState() == KThread::ThreadState_Waiting);
MESOSPHERE_ASSERT(this->current_request == this->request_queue.GetFront());
std::memcpy(this->current_request->GetLightSessionData(), server_thread->GetLightSessionData(), KLightSession::DataSize);
this->request_queue.WakeupThread(this->current_request);
}
/* Clear our current request. */
cur_request = this->current_request;
this->current_request = nullptr;
this->server_thread = nullptr;
}
/* Close the current request, if we had one. */
if (cur_request != nullptr) {
cur_request->Close();
}
/* Receive. */
bool set_cancellable = false;
while (true) {
KScopedSchedulerLock sl;
/* Check that we aren't already receiving. */
R_UNLESS(this->server_queue.IsEmpty(), svc::ResultInvalidState());
R_UNLESS(this->server_thread == nullptr, svc::ResultInvalidState());
/* If we cancelled in a previous loop, clear cancel state. */
if (set_cancellable) {
server_thread->ClearCancellable();
set_cancellable = false;
}
/* Check that we're open. */
R_UNLESS(!this->parent->IsClientClosed(), svc::ResultSessionClosed());
R_UNLESS(!this->parent->IsServerClosed(), svc::ResultSessionClosed());
/* If we have a request available, use it. */
if (this->current_request == nullptr && this->request_queue.IsEmpty()) {
this->current_request = this->request_queue.GetFront();
this->current_request->Open();
this->server_thread = server_thread;
} else {
/* Otherwise, wait for a request to come in. */
R_UNLESS(this->server_queue.SleepThread(server_thread), svc::ResultTerminationRequested());
/* Check if we were cancelled. */
if (server_thread->IsWaitCancelled()) {
this->server_queue.WakeupThread(server_thread);
server_thread->ClearWaitCancelled();
return svc::ResultCancelled();
}
/* Otherwise, mark as cancellable. */
server_thread->SetCancellable();
set_cancellable = true;
}
}
/* Copy the client data. */
std::memcpy(server_thread->GetLightSessionData(), this->current_request->GetLightSessionData(), KLightSession::DataSize);
}
void KLightServerSession::CleanupRequests() {
MESOSPHERE_UNIMPLEMENTED();
/* Cleanup all pending requests. */
KThread *cur_request = nullptr;
{
KScopedSchedulerLock sl;
/* Handle the current request. */
if (this->current_request != nullptr) {
/* Reply to the current request. */
if (!this->current_request->IsTerminationRequested()) {
MESOSPHERE_ASSERT(this->current_request->GetState() == KThread::ThreadState_Waiting);
MESOSPHERE_ASSERT(this->current_request == this->request_queue.GetFront());
this->request_queue.WakeupThread(this->current_request);
this->current_request->SetSyncedObject(nullptr, svc::ResultSessionClosed());
}
/* Clear our current request. */
cur_request = this->current_request;
this->current_request = nullptr;
this->server_thread = nullptr;
}
/* Reply to all other requests. */
while (!this->request_queue.IsEmpty()) {
KThread *client_thread = this->request_queue.WakeupFrontThread();
client_thread->SetSyncedObject(nullptr, svc::ResultSessionClosed());
}
/* Wake up all server threads. */
while (!this->server_queue.IsEmpty()) {
this->server_queue.WakeupFrontThread();
}
}
/* Close the current request, if we had one. */
if (cur_request != nullptr) {
cur_request->Close();
}
}
}

4
libraries/libmesosphere/source/kern_k_thread.cpp
View file

@ -720,8 +720,8 @@ namespace ams::kern {
/* Check if we're waiting and cancellable. */
if (this->GetState() == ThreadState_Waiting && this->cancellable) {
if (this->sleeping_queue != nullptr) {
/* TODO: Cancel light IPC. */
MESOSPHERE_UNIMPLEMENTED();
this->sleeping_queue->WakeupThread(this);
this->wait_cancelled = true;
} else {
this->SetSyncedObject(nullptr, svc::ResultCancelled());
this->SetState(ThreadState_Runnable);

36
libraries/libmesosphere/source/svc/kern_svc_light_ipc.cpp
View file

@ -21,28 +21,48 @@ namespace ams::kern::svc {
namespace {
ALWAYS_INLINE Result SendSyncRequestLight(ams::svc::Handle session_handle, u32 *args) {
/* Get the light client session from its handle. */
KScopedAutoObject session = GetCurrentProcess().GetHandleTable().GetObject<KLightClientSession>(session_handle);
R_UNLESS(session.IsNotNull(), svc::ResultInvalidHandle());
/* Send the request. */
R_TRY(session->SendSyncRequest(args));
return ResultSuccess();
}
ALWAYS_INLINE Result ReplyAndReceiveLight(ams::svc::Handle session_handle, u32 *args) {
/* Get the light server session from its handle. */
KScopedAutoObject session = GetCurrentProcess().GetHandleTable().GetObject<KLightServerSession>(session_handle);
R_UNLESS(session.IsNotNull(), svc::ResultInvalidHandle());
/* Handle the request. */
R_TRY(session->ReplyAndReceive(args));
return ResultSuccess();
}
}
/* ============================= 64 ABI ============================= */
Result SendSyncRequestLight64(ams::svc::Handle session_handle) {
MESOSPHERE_PANIC("Stubbed SvcSendSyncRequestLight64 was called.");
Result SendSyncRequestLight64(ams::svc::Handle session_handle, u32 *args) {
return SendSyncRequestLight(session_handle, args);
}
Result ReplyAndReceiveLight64(ams::svc::Handle handle) {
MESOSPHERE_PANIC("Stubbed SvcReplyAndReceiveLight64 was called.");
Result ReplyAndReceiveLight64(ams::svc::Handle session_handle, u32 *args) {
return ReplyAndReceiveLight(session_handle, args);
}
/* ============================= 64From32 ABI ============================= */
Result SendSyncRequestLight64From32(ams::svc::Handle session_handle) {
MESOSPHERE_PANIC("Stubbed SvcSendSyncRequestLight64From32 was called.");
Result SendSyncRequestLight64From32(ams::svc::Handle session_handle, u32 *args) {
return SendSyncRequestLight(session_handle, args);
}
Result ReplyAndReceiveLight64From32(ams::svc::Handle handle) {
MESOSPHERE_PANIC("Stubbed SvcReplyAndReceiveLight64From32 was called.");
Result ReplyAndReceiveLight64From32(ams::svc::Handle session_handle, u32 *args) {
return ReplyAndReceiveLight(session_handle, args);
}
}