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kern: SvcQueryPhysicalAddress

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This commit is contained in:
Michael Scire 2020-07-30 17:26:09 -07:00 committed by SciresM
parent 9bc2c0c0c5
commit 91fa0d651f
4 changed files with 107 additions and 2 deletions
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4
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_k_process_page_table.hpp
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@ -60,6 +60,10 @@ namespace ams::kern::arch::arm64 {
return this->page_table.QueryInfo(out_info, out_page_info, addr);
}
Result QueryPhysicalAddress(ams::svc::PhysicalMemoryInfo *out, KProcessAddress address) const {
return this->page_table.QueryPhysicalAddress(out, address);
}
Result QueryStaticMapping(KProcessAddress *out, KPhysicalAddress address, size_t size) const {
return this->page_table.QueryStaticMapping(out, address, size);
}

1
libraries/libmesosphere/include/mesosphere/kern_k_page_table_base.hpp
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@ -290,6 +290,7 @@ namespace ams::kern {
Result SetHeapSize(KProcessAddress *out, size_t size);
Result SetMaxHeapSize(size_t size);
Result QueryInfo(KMemoryInfo *out_info, ams::svc::PageInfo *out_page_info, KProcessAddress addr) const;
Result QueryPhysicalAddress(ams::svc::PhysicalMemoryInfo *out, KProcessAddress address) const;
Result QueryStaticMapping(KProcessAddress *out, KPhysicalAddress address, size_t size) const { return this->QueryMappingImpl(out, address, size, KMemoryState_Static); }
Result QueryIoMapping(KProcessAddress *out, KPhysicalAddress address, size_t size) const { return this->QueryMappingImpl(out, address, size, KMemoryState_Io); }
Result MapMemory(KProcessAddress dst_address, KProcessAddress src_address, size_t size);

76
libraries/libmesosphere/source/kern_k_page_table_base.cpp
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@ -1492,6 +1492,82 @@ namespace ams::kern {
return this->QueryInfoImpl(out_info, out_page_info, addr);
}
Result KPageTableBase::QueryPhysicalAddress(ams::svc::PhysicalMemoryInfo *out, KProcessAddress address) const {
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Align the address down to page size. */
address = util::AlignDown(GetInteger(address), PageSize);
/* Verify that we can query the address. */
KMemoryInfo info;
ams::svc::PageInfo page_info;
R_TRY(this->QueryInfoImpl(std::addressof(info), std::addressof(page_info), address));
/* Check the memory state. */
R_TRY(this->CheckMemoryState(info, KMemoryState_FlagCanQueryPhysical, KMemoryState_FlagCanQueryPhysical, KMemoryPermission_UserReadExecute, KMemoryPermission_UserRead, KMemoryAttribute_None, KMemoryAttribute_None));
/* Prepare to traverse. */
KPhysicalAddress phys_addr;
size_t phys_size;
KProcessAddress virt_addr = info.GetAddress();
KProcessAddress end_addr = info.GetEndAddress();
/* Perform traversal. */
{
/* Begin traversal. */
TraversalContext context;
TraversalEntry next_entry;
bool traverse_valid = impl.BeginTraversal(std::addressof(next_entry), std::addressof(context), virt_addr);
R_UNLESS(traverse_valid, svc::ResultInvalidCurrentMemory());
/* Set tracking variables. */
phys_addr = next_entry.phys_addr;
phys_size = next_entry.block_size - (GetInteger(phys_addr) & (next_entry.block_size - 1));
/* Iterate. */
while (true) {
/* Continue the traversal. */
traverse_valid = impl.ContinueTraversal(std::addressof(next_entry), std::addressof(context));
if (!traverse_valid) {
break;
}
if (next_entry.phys_addr != (phys_addr + phys_size)) {
/* Check if we're done. */
if (virt_addr <= address && address <= virt_addr + phys_size - 1) {
break;
}
/* Advance. */
phys_addr = next_entry.phys_addr;
virt_addr += next_entry.block_size;
phys_size = next_entry.block_size - (GetInteger(phys_addr) & (next_entry.block_size - 1));
} else {
phys_size += next_entry.block_size;
}
/* Check if we're done. */
if (end_addr < virt_addr + phys_size) {
break;
}
}
MESOSPHERE_ASSERT(virt_addr <= address && address <= virt_addr + phys_size - 1);
/* Ensure we use the right size. */
if (end_addr < virt_addr + phys_size) {
phys_size = end_addr - virt_addr;
}
}
/* Set the output. */
out->physical_address = GetInteger(phys_addr);
out->virtual_address = GetInteger(virt_addr);
out->size = phys_size;
return ResultSuccess();
}
Result KPageTableBase::MapIo(KPhysicalAddress phys_addr, size_t size, KMemoryPermission perm) {
MESOSPHERE_ASSERT(util::IsAligned(GetInteger(phys_addr), PageSize));
MESOSPHERE_ASSERT(util::IsAligned(size, PageSize));

28
libraries/libmesosphere/source/svc/kern_svc_address_translation.cpp
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@ -21,6 +21,22 @@ namespace ams::kern::svc {
namespace {
Result QueryPhysicalAddress(ams::svc::PhysicalMemoryInfo *out_info, uintptr_t address) {
/* NOTE: In 10.0.0, Nintendo stubbed this SVC. Should we do so? */
/* R_UNLESS(GetTargetFirmware() < TargetFirmware_10_0_0, svc::ResultInvalidCurrentMemory()); */
/* Get reference to page table. */
auto &pt = GetCurrentProcess().GetPageTable();
/* Check that the address is valid. */
R_UNLESS(pt.Contains(address, 1), svc::ResultInvalidCurrentMemory());
/* Query the physical mapping. */
R_TRY(pt.QueryPhysicalAddress(out_info, address));
return ResultSuccess();
}
Result QueryIoMapping(uintptr_t *out_address, size_t *out_size, uint64_t phys_addr, size_t size) {
/* Declare variables we'll populate. */
KProcessAddress found_address = Null<KProcessAddress>;
@ -105,7 +121,7 @@ namespace ams::kern::svc {
/* ============================= 64 ABI ============================= */
Result QueryPhysicalAddress64(ams::svc::lp64::PhysicalMemoryInfo *out_info, ams::svc::Address address) {
MESOSPHERE_PANIC("Stubbed SvcQueryPhysicalAddress64 was called.");
return QueryPhysicalAddress(out_info, address);
}
Result QueryIoMapping64(ams::svc::Address *out_address, ams::svc::Size *out_size, ams::svc::PhysicalAddress physical_address, ams::svc::Size size) {
@ -122,7 +138,15 @@ namespace ams::kern::svc {
/* ============================= 64From32 ABI ============================= */
Result QueryPhysicalAddress64From32(ams::svc::ilp32::PhysicalMemoryInfo *out_info, ams::svc::Address address) {
MESOSPHERE_PANIC("Stubbed SvcQueryPhysicalAddress64From32 was called.");
ams::svc::PhysicalMemoryInfo info = {};
R_TRY(QueryPhysicalAddress(std::addressof(info), address));
*out_info = {
.physical_address = info.physical_address,
.virtual_address = static_cast<u32>(info.virtual_address),
.size = static_cast<u32>(info.size),
};
return ResultSuccess();
}
Result QueryIoMapping64From32(ams::svc::Address *out_address, ams::svc::Size *out_size, ams::svc::PhysicalAddress physical_address, ams::svc::Size size) {