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Merge pull request #3314 from degasus/physical_mem

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core/hle/kernel: Simplify PhysicalMemory usages.
This commit is contained in:
bunnei 2020-01-18 03:03:48 -05:00 committed by GitHub
commit 278264b9e5
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7 changed files with 54 additions and 35 deletions
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5
src/core/hle/kernel/physical_memory.h
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@ -14,6 +14,9 @@ namespace Kernel {
// - Second to ensure all host backing memory used is aligned to 256 bytes due
// to strict alignment restrictions on GPU memory.
using PhysicalMemory = std::vector<u8, Common::AlignmentAllocator<u8, 256>>;
using PhysicalMemoryVector = std::vector<u8, Common::AlignmentAllocator<u8, 256>>;
class PhysicalMemory final : public PhysicalMemoryVector {
using PhysicalMemoryVector::PhysicalMemoryVector;
};
} // namespace Kernel

31
src/core/hle/kernel/vm_manager.cpp
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@ -3,6 +3,7 @@
// Refer to the license.txt file included.
#include <algorithm>
#include <cstring>
#include <iterator>
#include <utility>
#include "common/alignment.h"
@ -269,18 +270,9 @@ ResultVal<VAddr> VMManager::SetHeapSize(u64 size) {
// If necessary, expand backing vector to cover new heap extents in
// the case of allocating. Otherwise, shrink the backing memory,
// if a smaller heap has been requested.
const u64 old_heap_size = GetCurrentHeapSize();
if (size > old_heap_size) {
const u64 alloc_size = size - old_heap_size;
heap_memory->insert(heap_memory->end(), alloc_size, 0);
RefreshMemoryBlockMappings(heap_memory.get());
} else if (size < old_heap_size) {
heap_memory->resize(size);
heap_memory->shrink_to_fit();
RefreshMemoryBlockMappings(heap_memory.get());
}
heap_end = heap_region_base + size;
ASSERT(GetCurrentHeapSize() == heap_memory->size());
@ -752,24 +744,20 @@ void VMManager::MergeAdjacentVMA(VirtualMemoryArea& left, const VirtualMemoryAre
// Always merge allocated memory blocks, even when they don't share the same backing block.
if (left.type == VMAType::AllocatedMemoryBlock &&
(left.backing_block != right.backing_block || left.offset + left.size != right.offset)) {
const auto right_begin = right.backing_block->begin() + right.offset;
const auto right_end = right_begin + right.size;
// Check if we can save work.
if (left.offset == 0 && left.size == left.backing_block->size()) {
// Fast case: left is an entire backing block.
left.backing_block->insert(left.backing_block->end(), right_begin, right_end);
left.backing_block->resize(left.size + right.size);
std::memcpy(left.backing_block->data() + left.size,
right.backing_block->data() + right.offset, right.size);
} else {
// Slow case: make a new memory block for left and right.
const auto left_begin = left.backing_block->begin() + left.offset;
const auto left_end = left_begin + left.size;
const auto left_size = static_cast<std::size_t>(std::distance(left_begin, left_end));
const auto right_size = static_cast<std::size_t>(std::distance(right_begin, right_end));
auto new_memory = std::make_shared<PhysicalMemory>();
new_memory->reserve(left_size + right_size);
new_memory->insert(new_memory->end(), left_begin, left_end);
new_memory->insert(new_memory->end(), right_begin, right_end);
new_memory->resize(left.size + right.size);
std::memcpy(new_memory->data(), left.backing_block->data() + left.offset, left.size);
std::memcpy(new_memory->data() + left.size, right.backing_block->data() + right.offset,
right.size);
left.backing_block = std::move(new_memory);
left.offset = 0;
@ -792,8 +780,7 @@ void VMManager::UpdatePageTableForVMA(const VirtualMemoryArea& vma) {
memory.UnmapRegion(page_table, vma.base, vma.size);
break;
case VMAType::AllocatedMemoryBlock:
memory.MapMemoryRegion(page_table, vma.base, vma.size,
vma.backing_block->data() + vma.offset);
memory.MapMemoryRegion(page_table, vma.base, vma.size, *vma.backing_block, vma.offset);
break;
case VMAType::BackingMemory:
memory.MapMemoryRegion(page_table, vma.base, vma.size, vma.backing_memory);

3
src/core/loader/elf.cpp
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@ -335,7 +335,8 @@ Kernel::CodeSet ElfReader::LoadInto(VAddr vaddr) {
codeset_segment->addr = segment_addr;
codeset_segment->size = aligned_size;
memcpy(&program_image[current_image_position], GetSegmentPtr(i), p->p_filesz);
std::memcpy(program_image.data() + current_image_position, GetSegmentPtr(i),
p->p_filesz);
current_image_position += aligned_size;
}
}

5
src/core/loader/kip.cpp
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@ -2,6 +2,7 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cstring>
#include "core/file_sys/kernel_executable.h"
#include "core/file_sys/program_metadata.h"
#include "core/gdbstub/gdbstub.h"
@ -76,8 +77,8 @@ AppLoader::LoadResult AppLoader_KIP::Load(Kernel::Process& process) {
segment.addr = offset;
segment.offset = offset;
segment.size = PageAlignSize(static_cast<u32>(data.size()));
program_image.resize(offset);
program_image.insert(program_image.end(), data.begin(), data.end());
program_image.resize(offset + data.size());
std::memcpy(program_image.data() + offset, data.data(), data.size());
};
load_segment(codeset.CodeSegment(), kip->GetTextSection(), kip->GetTextOffset());

12
src/core/loader/nso.cpp
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@ -3,6 +3,7 @@
// Refer to the license.txt file included.
#include <cinttypes>
#include <cstring>
#include <vector>
#include "common/common_funcs.h"
@ -96,8 +97,9 @@ std::optional<VAddr> AppLoader_NSO::LoadModule(Kernel::Process& process,
if (nso_header.IsSegmentCompressed(i)) {
data = DecompressSegment(data, nso_header.segments[i]);
}
program_image.resize(nso_header.segments[i].location);
program_image.insert(program_image.end(), data.begin(), data.end());
program_image.resize(nso_header.segments[i].location + data.size());
std::memcpy(program_image.data() + nso_header.segments[i].location, data.data(),
data.size());
codeset.segments[i].addr = nso_header.segments[i].location;
codeset.segments[i].offset = nso_header.segments[i].location;
codeset.segments[i].size = PageAlignSize(static_cast<u32>(data.size()));
@ -139,12 +141,12 @@ std::optional<VAddr> AppLoader_NSO::LoadModule(Kernel::Process& process,
std::vector<u8> pi_header;
pi_header.insert(pi_header.begin(), reinterpret_cast<u8*>(&nso_header),
reinterpret_cast<u8*>(&nso_header) + sizeof(NSOHeader));
pi_header.insert(pi_header.begin() + sizeof(NSOHeader), program_image.begin(),
program_image.end());
pi_header.insert(pi_header.begin() + sizeof(NSOHeader), program_image.data(),
program_image.data() + program_image.size());
pi_header = pm->PatchNSO(pi_header, file.GetName());
std::copy(pi_header.begin() + sizeof(NSOHeader), pi_header.end(), program_image.begin());
std::copy(pi_header.begin() + sizeof(NSOHeader), pi_header.end(), program_image.data());
}
// Apply cheats if they exist and the program has a valid title ID

11
src/core/memory.cpp
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@ -14,6 +14,7 @@
#include "common/swap.h"
#include "core/arm/arm_interface.h"
#include "core/core.h"
#include "core/hle/kernel/physical_memory.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/vm_manager.h"
#include "core/memory.h"
@ -38,6 +39,11 @@ struct Memory::Impl {
system.ArmInterface(3).PageTableChanged(*current_page_table, address_space_width);
}
void MapMemoryRegion(Common::PageTable& page_table, VAddr base, u64 size,
Kernel::PhysicalMemory& memory, VAddr offset) {
MapMemoryRegion(page_table, base, size, memory.data() + offset);
}
void MapMemoryRegion(Common::PageTable& page_table, VAddr base, u64 size, u8* target) {
ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: {:016X}", size);
ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: {:016X}", base);
@ -601,6 +607,11 @@ void Memory::SetCurrentPageTable(Kernel::Process& process) {
impl->SetCurrentPageTable(process);
}
void Memory::MapMemoryRegion(Common::PageTable& page_table, VAddr base, u64 size,
Kernel::PhysicalMemory& memory, VAddr offset) {
impl->MapMemoryRegion(page_table, base, size, memory, offset);
}
void Memory::MapMemoryRegion(Common::PageTable& page_table, VAddr base, u64 size, u8* target) {
impl->MapMemoryRegion(page_table, base, size, target);
}

16
src/core/memory.h
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@ -19,8 +19,9 @@ class System;
}
namespace Kernel {
class PhysicalMemory;
class Process;
}
} // namespace Kernel
namespace Memory {
@ -65,6 +66,19 @@ public:
*/
void SetCurrentPageTable(Kernel::Process& process);
/**
* Maps an physical buffer onto a region of the emulated process address space.
*
* @param page_table The page table of the emulated process.
* @param base The address to start mapping at. Must be page-aligned.
* @param size The amount of bytes to map. Must be page-aligned.
* @param memory Physical buffer with the memory backing the mapping. Must be of length
* at least `size + offset`.
* @param offset The offset within the physical memory. Must be page-aligned.
*/
void MapMemoryRegion(Common::PageTable& page_table, VAddr base, u64 size,
Kernel::PhysicalMemory& memory, VAddr offset);
/**
* Maps an allocated buffer onto a region of the emulated process address space.
*