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kern/dmnt2: allow retrieval of process info via extension

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This also fixes ctrl-c break in gdbstub, and fixes crash on unknown monitor cmd.
This commit is contained in:
Michael Scire 2021-11-01 12:05:47 -07:00 • committed by SciresM
parent ca0308c7ca
commit 4cc5e9cdfd
5 changed files with 214 additions and 78 deletions
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6
libraries/libmesosphere/include/mesosphere/kern_build_config.hpp
View file

@ -40,6 +40,12 @@
/* of the right side, and so this does not actually cost any space. */
#define MESOSPHERE_ENABLE_DEVIRTUALIZED_DYNAMIC_CAST
/* NOTE: This enables usage of KDebug handles as parameter for svc::GetInfo */
/* calls which require a process parameter. This enables a debugger to obtain */
/* address space/layout information, for example. However, it changes abi, and so */
/* this define allows toggling the extension. */
#define MESOSPHERE_ENABLE_GET_INFO_OF_DEBUG_PROCESS
/* NOTE: This uses currently-reserved bits inside the MapRange capability */
/* in order to support large physical addresses (40-bit instead of 36). */
/* This is toggleable in order to disable it if N ever uses those bits. */

169
libraries/libmesosphere/source/svc/kern_svc_info.cpp
View file

@ -38,6 +38,80 @@ namespace ams::kern::svc {
return ResultSuccess();
}
Result GetInfoImpl(u64 *out, ams::svc::InfoType info_type, KProcess *process) {
switch (info_type) {
case ams::svc::InfoType_CoreMask:
*out = process->GetCoreMask();
break;
case ams::svc::InfoType_PriorityMask:
*out = process->GetPriorityMask();
break;
case ams::svc::InfoType_AliasRegionAddress:
*out = GetInteger(process->GetPageTable().GetAliasRegionStart());
break;
case ams::svc::InfoType_AliasRegionSize:
*out = process->GetPageTable().GetAliasRegionSize();
break;
case ams::svc::InfoType_HeapRegionAddress:
*out = GetInteger(process->GetPageTable().GetHeapRegionStart());
break;
case ams::svc::InfoType_HeapRegionSize:
*out = process->GetPageTable().GetHeapRegionSize();
break;
case ams::svc::InfoType_TotalMemorySize:
*out = process->GetTotalUserPhysicalMemorySize();
break;
case ams::svc::InfoType_UsedMemorySize:
*out = process->GetUsedUserPhysicalMemorySize();
break;
case ams::svc::InfoType_AslrRegionAddress:
*out = GetInteger(process->GetPageTable().GetAliasCodeRegionStart());
break;
case ams::svc::InfoType_AslrRegionSize:
*out = process->GetPageTable().GetAliasCodeRegionSize();
break;
case ams::svc::InfoType_StackRegionAddress:
*out = GetInteger(process->GetPageTable().GetStackRegionStart());
break;
case ams::svc::InfoType_StackRegionSize:
*out = process->GetPageTable().GetStackRegionSize();
break;
case ams::svc::InfoType_SystemResourceSizeTotal:
*out = process->GetTotalSystemResourceSize();
break;
case ams::svc::InfoType_SystemResourceSizeUsed:
*out = process->GetUsedSystemResourceSize();
break;
case ams::svc::InfoType_ProgramId:
*out = process->GetProgramId();
break;
case ams::svc::InfoType_UserExceptionContextAddress:
*out = GetInteger(process->GetProcessLocalRegionAddress());
break;
case ams::svc::InfoType_TotalNonSystemMemorySize:
*out = process->GetTotalNonSystemUserPhysicalMemorySize();
break;
case ams::svc::InfoType_UsedNonSystemMemorySize:
*out = process->GetUsedNonSystemUserPhysicalMemorySize();
break;
case ams::svc::InfoType_IsApplication:
*out = process->IsApplication();
break;
case ams::svc::InfoType_FreeThreadCount:
if (KResourceLimit *resource_limit = process->GetResourceLimit(); resource_limit != nullptr) {
const auto current_value = resource_limit->GetCurrentValue(ams::svc::LimitableResource_ThreadCountMax);
const auto limit_value = resource_limit->GetLimitValue(ams::svc::LimitableResource_ThreadCountMax);
*out = limit_value - current_value;
} else {
*out = 0;
}
break;
MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
}
return ResultSuccess();
}
Result GetInfo(u64 *out, ams::svc::InfoType info_type, ams::svc::Handle handle, u64 info_subtype) {
switch (info_type) {
case ams::svc::InfoType_CoreMask:
@ -66,77 +140,34 @@ namespace ams::kern::svc {
/* Get the process from its handle. */
KScopedAutoObject process = GetCurrentProcess().GetHandleTable().GetObject<KProcess>(handle);
#if defined(MESOSPHERE_ENABLE_GET_INFO_OF_DEBUG_PROCESS)
/* If we the process is valid, use it. */
if (process.IsNotNull()) {
return GetInfoImpl(out, info_type, process.GetPointerUnsafe());
}
/* Otherwise, as a mesosphere extension check if we were passed a usable KDebug. */
KScopedAutoObject debug = GetCurrentProcess().GetHandleTable().GetObject<KDebug>(handle);
R_UNLESS(debug.IsNotNull(), svc::ResultInvalidHandle());
/* Get the process from the debug object. */
/* TODO: ResultInvalidHandle()? */
R_UNLESS(debug->IsAttached(), svc::ResultProcessTerminated());
R_UNLESS(debug->OpenProcess(), svc::ResultProcessTerminated());
/* Close the process when we're done. */
ON_SCOPE_EXIT { debug->CloseProcess(); };
/* Return the info. */
return GetInfoImpl(out, info_type, debug->GetProcessUnsafe());
#else
/* Verify that the process is valid. */
R_UNLESS(process.IsNotNull(), svc::ResultInvalidHandle());
switch (info_type) {
case ams::svc::InfoType_CoreMask:
*out = process->GetCoreMask();
break;
case ams::svc::InfoType_PriorityMask:
*out = process->GetPriorityMask();
break;
case ams::svc::InfoType_AliasRegionAddress:
*out = GetInteger(process->GetPageTable().GetAliasRegionStart());
break;
case ams::svc::InfoType_AliasRegionSize:
*out = process->GetPageTable().GetAliasRegionSize();
break;
case ams::svc::InfoType_HeapRegionAddress:
*out = GetInteger(process->GetPageTable().GetHeapRegionStart());
break;
case ams::svc::InfoType_HeapRegionSize:
*out = process->GetPageTable().GetHeapRegionSize();
break;
case ams::svc::InfoType_TotalMemorySize:
*out = process->GetTotalUserPhysicalMemorySize();
break;
case ams::svc::InfoType_UsedMemorySize:
*out = process->GetUsedUserPhysicalMemorySize();
break;
case ams::svc::InfoType_AslrRegionAddress:
*out = GetInteger(process->GetPageTable().GetAliasCodeRegionStart());
break;
case ams::svc::InfoType_AslrRegionSize:
*out = process->GetPageTable().GetAliasCodeRegionSize();
break;
case ams::svc::InfoType_StackRegionAddress:
*out = GetInteger(process->GetPageTable().GetStackRegionStart());
break;
case ams::svc::InfoType_StackRegionSize:
*out = process->GetPageTable().GetStackRegionSize();
break;
case ams::svc::InfoType_SystemResourceSizeTotal:
*out = process->GetTotalSystemResourceSize();
break;
case ams::svc::InfoType_SystemResourceSizeUsed:
*out = process->GetUsedSystemResourceSize();
break;
case ams::svc::InfoType_ProgramId:
*out = process->GetProgramId();
break;
case ams::svc::InfoType_UserExceptionContextAddress:
*out = GetInteger(process->GetProcessLocalRegionAddress());
break;
case ams::svc::InfoType_TotalNonSystemMemorySize:
*out = process->GetTotalNonSystemUserPhysicalMemorySize();
break;
case ams::svc::InfoType_UsedNonSystemMemorySize:
*out = process->GetUsedNonSystemUserPhysicalMemorySize();
break;
case ams::svc::InfoType_IsApplication:
*out = process->IsApplication();
break;
case ams::svc::InfoType_FreeThreadCount:
if (KResourceLimit *resource_limit = process->GetResourceLimit(); resource_limit != nullptr) {
const auto current_value = resource_limit->GetCurrentValue(ams::svc::LimitableResource_ThreadCountMax);
const auto limit_value = resource_limit->GetLimitValue(ams::svc::LimitableResource_ThreadCountMax);
*out = limit_value - current_value;
} else {
*out = 0;
}
break;
MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
}
/* Return the relevant info. */
return GetInfoImpl(out, info_type, process.GetPointerUnsafe());
#endif
}
break;
case ams::svc::InfoType_DebuggerAttached: