Atmosphere/libraries/libmesosphere/source/svc/kern_svc_physical_memory.cpp

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/*
* 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/>.
*/
#include <mesosphere.hpp>
namespace ams::kern::svc {
/* ============================= Common ============================= */
namespace {
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Result SetHeapSize(uintptr_t *out_address, size_t size) {
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MESOSPHERE_LOG("%s: SetHeapSize(%012zx)\n", GetCurrentProcess().GetName(), size);
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/* Validate size. */
R_UNLESS(util::IsAligned(size, ams::svc::HeapSizeAlignment), svc::ResultInvalidSize());
R_UNLESS(size < ams::kern::MainMemorySize, svc::ResultInvalidSize());
/* Set the heap size. */
KProcessAddress address;
R_TRY(GetCurrentProcess().GetPageTable().SetHeapSize(std::addressof(address), size));
/* Set the output. */
*out_address = GetInteger(address);
return ResultSuccess();
}
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Result SetUnsafeLimit(size_t limit) {
/* Ensure the size is aligned. */
R_UNLESS(util::IsAligned(limit, PageSize), svc::ResultInvalidSize());
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/* Ensure that the size is not bigger than we can accommodate. */
R_UNLESS(limit <= Kernel::GetMemoryManager().GetSize(KMemoryManager::Pool_Unsafe), svc::ResultOutOfRange());
/* Set the size. */
return Kernel::GetUnsafeMemory().SetLimitSize(limit);
}
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Result MapPhysicalMemory(uintptr_t address, size_t size) {
/* Validate address / size. */
R_UNLESS(util::IsAligned(address, PageSize), svc::ResultInvalidAddress());
R_UNLESS(util::IsAligned(size, PageSize), svc::ResultInvalidSize());
R_UNLESS(size > 0, svc::ResultInvalidSize());
R_UNLESS((address < address + size), svc::ResultInvalidMemoryRegion());
/* Verify that the process has system resource. */
auto &process = GetCurrentProcess();
R_UNLESS(process.GetTotalSystemResourceSize() > 0, svc::ResultInvalidState());
/* Verify that the region is in range. */
auto &page_table = process.GetPageTable();
R_UNLESS(page_table.IsInAliasRegion(address, size), svc::ResultInvalidMemoryRegion());
/* Map the memory. */
R_TRY(page_table.MapPhysicalMemory(address, size));
return ResultSuccess();
}
Result UnmapPhysicalMemory(uintptr_t address, size_t size) {
/* Validate address / size. */
R_UNLESS(util::IsAligned(address, PageSize), svc::ResultInvalidAddress());
R_UNLESS(util::IsAligned(size, PageSize), svc::ResultInvalidSize());
R_UNLESS(size > 0, svc::ResultInvalidSize());
R_UNLESS((address < address + size), svc::ResultInvalidMemoryRegion());
/* Verify that the process has system resource. */
auto &process = GetCurrentProcess();
R_UNLESS(process.GetTotalSystemResourceSize() > 0, svc::ResultInvalidState());
/* Verify that the region is in range. */
auto &page_table = process.GetPageTable();
R_UNLESS(page_table.IsInAliasRegion(address, size), svc::ResultInvalidMemoryRegion());
/* Unmap the memory. */
R_TRY(page_table.UnmapPhysicalMemory(address, size));
return ResultSuccess();
}
}
/* ============================= 64 ABI ============================= */
Result SetHeapSize64(ams::svc::Address *out_address, ams::svc::Size size) {
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static_assert(sizeof(*out_address) == sizeof(uintptr_t));
return SetHeapSize(reinterpret_cast<uintptr_t *>(out_address), size);
}
Result MapPhysicalMemory64(ams::svc::Address address, ams::svc::Size size) {
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return MapPhysicalMemory(address, size);
}
Result UnmapPhysicalMemory64(ams::svc::Address address, ams::svc::Size size) {
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return UnmapPhysicalMemory(address, size);
}
Result MapPhysicalMemoryUnsafe64(ams::svc::Address address, ams::svc::Size size) {
MESOSPHERE_PANIC("Stubbed SvcMapPhysicalMemoryUnsafe64 was called.");
}
Result UnmapPhysicalMemoryUnsafe64(ams::svc::Address address, ams::svc::Size size) {
MESOSPHERE_PANIC("Stubbed SvcUnmapPhysicalMemoryUnsafe64 was called.");
}
Result SetUnsafeLimit64(ams::svc::Size limit) {
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return SetUnsafeLimit(limit);
}
/* ============================= 64From32 ABI ============================= */
Result SetHeapSize64From32(ams::svc::Address *out_address, ams::svc::Size size) {
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static_assert(sizeof(*out_address) == sizeof(uintptr_t));
return SetHeapSize(reinterpret_cast<uintptr_t *>(out_address), size);
}
Result MapPhysicalMemory64From32(ams::svc::Address address, ams::svc::Size size) {
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return MapPhysicalMemory(address, size);
}
Result UnmapPhysicalMemory64From32(ams::svc::Address address, ams::svc::Size size) {
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return UnmapPhysicalMemory(address, size);
}
Result MapPhysicalMemoryUnsafe64From32(ams::svc::Address address, ams::svc::Size size) {
MESOSPHERE_PANIC("Stubbed SvcMapPhysicalMemoryUnsafe64From32 was called.");
}
Result UnmapPhysicalMemoryUnsafe64From32(ams::svc::Address address, ams::svc::Size size) {
MESOSPHERE_PANIC("Stubbed SvcUnmapPhysicalMemoryUnsafe64From32 was called.");
}
Result SetUnsafeLimit64From32(ams::svc::Size limit) {
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return SetUnsafeLimit(limit);
}
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}