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suyu/src/core/hle/kernel/process.cpp
Lioncash dccfe193a9 kernel/process: Add a data member to determine if a process is 64-bit or not. 
This will be necessary for the implementation of svcGetThreadContext(),
as the kernel checks whether or not the process that owns the thread
that has it context being retrieved is a 64-bit or 32-bit process.

If the process is 32-bit, then the upper 15 general-purpose registers
and upper 16 vector registers are cleared to zero (as AArch32 only has
15 GPRs and 16 128-bit vector registers. not 31 general-purpose
registers and 32 128-bit vector registers like AArch64).
2018-09-30 05:29:40 -04:00

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// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <memory>
#include "common/assert.h"
#include "common/common_funcs.h"
#include "common/logging/log.h"
#include "core/core.h"
#include "core/file_sys/program_metadata.h"
#include "core/hle/kernel/errors.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/resource_limit.h"
#include "core/hle/kernel/scheduler.h"
#include "core/hle/kernel/thread.h"
#include "core/hle/kernel/vm_manager.h"
#include "core/memory.h"
namespace Kernel {
SharedPtr<CodeSet> CodeSet::Create(KernelCore& kernel, std::string name) {
SharedPtr<CodeSet> codeset(new CodeSet(kernel));
codeset->name = std::move(name);
return codeset;
}
CodeSet::CodeSet(KernelCore& kernel) : Object{kernel} {}
CodeSet::~CodeSet() = default;
SharedPtr<Process> Process::Create(KernelCore& kernel, std::string&& name) {
SharedPtr<Process> process(new Process(kernel));
process->name = std::move(name);
process->flags.raw = 0;
process->flags.memory_region.Assign(MemoryRegion::APPLICATION);
process->resource_limit = kernel.ResourceLimitForCategory(ResourceLimitCategory::APPLICATION);
process->status = ProcessStatus::Created;
process->program_id = 0;
process->process_id = kernel.CreateNewProcessID();
process->svc_access_mask.set();
kernel.AppendNewProcess(process);
return process;
}
void Process::LoadFromMetadata(const FileSys::ProgramMetadata& metadata) {
program_id = metadata.GetTitleID();
is_64bit_process = metadata.Is64BitProgram();
vm_manager.Reset(metadata.GetAddressSpaceType());
}
void Process::ParseKernelCaps(const u32* kernel_caps, std::size_t len) {
for (std::size_t i = 0; i < len; ++i) {
u32 descriptor = kernel_caps[i];
u32 type = descriptor >> 20;
if (descriptor == 0xFFFFFFFF) {
// Unused descriptor entry
continue;
} else if ((type & 0xF00) == 0xE00) { // 0x0FFF
// Allowed interrupts list
LOG_WARNING(Loader, "ExHeader allowed interrupts list ignored");
} else if ((type & 0xF80) == 0xF00) { // 0x07FF
// Allowed syscalls mask
unsigned int index = ((descriptor >> 24) & 7) * 24;
u32 bits = descriptor & 0xFFFFFF;
while (bits && index < svc_access_mask.size()) {
svc_access_mask.set(index, bits & 1);
++index;
bits >>= 1;
}
} else if ((type & 0xFF0) == 0xFE0) { // 0x00FF
// Handle table size
handle_table_size = descriptor & 0x3FF;
} else if ((type & 0xFF8) == 0xFF0) { // 0x007F
// Misc. flags
flags.raw = descriptor & 0xFFFF;
} else if ((type & 0xFFE) == 0xFF8) { // 0x001F
// Mapped memory range
if (i + 1 >= len || ((kernel_caps[i + 1] >> 20) & 0xFFE) != 0xFF8) {
LOG_WARNING(Loader, "Incomplete exheader memory range descriptor ignored.");
continue;
}
u32 end_desc = kernel_caps[i + 1];
++i; // Skip over the second descriptor on the next iteration
AddressMapping mapping;
mapping.address = descriptor << 12;
VAddr end_address = end_desc << 12;
if (mapping.address < end_address) {
mapping.size = end_address - mapping.address;
} else {
mapping.size = 0;
}
mapping.read_only = (descriptor & (1 << 20)) != 0;
mapping.unk_flag = (end_desc & (1 << 20)) != 0;
address_mappings.push_back(mapping);
} else if ((type & 0xFFF) == 0xFFE) { // 0x000F
// Mapped memory page
AddressMapping mapping;
mapping.address = descriptor << 12;
mapping.size = Memory::PAGE_SIZE;
mapping.read_only = false;
mapping.unk_flag = false;
address_mappings.push_back(mapping);
} else if ((type & 0xFE0) == 0xFC0) { // 0x01FF
// Kernel version
kernel_version = descriptor & 0xFFFF;
int minor = kernel_version & 0xFF;
int major = (kernel_version >> 8) & 0xFF;
LOG_INFO(Loader, "ExHeader kernel version: {}.{}", major, minor);
} else {
LOG_ERROR(Loader, "Unhandled kernel caps descriptor: 0x{:08X}", descriptor);
}
}
}
void Process::Run(VAddr entry_point, s32 main_thread_priority, u32 stack_size) {
// Allocate and map the main thread stack
// TODO(bunnei): This is heap area that should be allocated by the kernel and not mapped as part
// of the user address space.
vm_manager
.MapMemoryBlock(vm_manager.GetTLSIORegionEndAddress() - stack_size,
std::make_shared<std::vector<u8>>(stack_size, 0), 0, stack_size,
MemoryState::Mapped)
.Unwrap();
vm_manager.LogLayout();
status = ProcessStatus::Running;
Kernel::SetupMainThread(kernel, entry_point, main_thread_priority, *this);
}
void Process::PrepareForTermination() {
status = ProcessStatus::Exited;
const auto stop_threads = [this](const std::vector<SharedPtr<Thread>>& thread_list) {
for (auto& thread : thread_list) {
if (thread->owner_process != this)
continue;
if (thread == GetCurrentThread())
continue;
// TODO(Subv): When are the other running/ready threads terminated?
ASSERT_MSG(thread->status == ThreadStatus::WaitSynchAny ||
thread->status == ThreadStatus::WaitSynchAll,
"Exiting processes with non-waiting threads is currently unimplemented");
thread->Stop();
}
};
auto& system = Core::System::GetInstance();
stop_threads(system.Scheduler(0)->GetThreadList());
stop_threads(system.Scheduler(1)->GetThreadList());
stop_threads(system.Scheduler(2)->GetThreadList());
stop_threads(system.Scheduler(3)->GetThreadList());
}
/**
* Finds a free location for the TLS section of a thread.
* @param tls_slots The TLS page array of the thread's owner process.
* Returns a tuple of (page, slot, alloc_needed) where:
* page: The index of the first allocated TLS page that has free slots.
* slot: The index of the first free slot in the indicated page.
* alloc_needed: Whether there's a need to allocate a new TLS page (All pages are full).
*/
static std::tuple<std::size_t, std::size_t, bool> FindFreeThreadLocalSlot(
const std::vector<std::bitset<8>>& tls_slots) {
// Iterate over all the allocated pages, and try to find one where not all slots are used.
for (std::size_t page = 0; page < tls_slots.size(); ++page) {
const auto& page_tls_slots = tls_slots[page];
if (!page_tls_slots.all()) {
// We found a page with at least one free slot, find which slot it is
for (std::size_t slot = 0; slot < page_tls_slots.size(); ++slot) {
if (!page_tls_slots.test(slot)) {
return std::make_tuple(page, slot, false);
}
}
}
}
return std::make_tuple(0, 0, true);
}
VAddr Process::MarkNextAvailableTLSSlotAsUsed(Thread& thread) {
auto [available_page, available_slot, needs_allocation] = FindFreeThreadLocalSlot(tls_slots);
const VAddr tls_begin = vm_manager.GetTLSIORegionBaseAddress();
if (needs_allocation) {
tls_slots.emplace_back(0); // The page is completely available at the start
available_page = tls_slots.size() - 1;
available_slot = 0; // Use the first slot in the new page
// Allocate some memory from the end of the linear heap for this region.
auto& tls_memory = thread.GetTLSMemory();
tls_memory->insert(tls_memory->end(), Memory::PAGE_SIZE, 0);
vm_manager.RefreshMemoryBlockMappings(tls_memory.get());
vm_manager.MapMemoryBlock(tls_begin + available_page * Memory::PAGE_SIZE, tls_memory, 0,
Memory::PAGE_SIZE, MemoryState::ThreadLocal);
}
tls_slots[available_page].set(available_slot);
return tls_begin + available_page * Memory::PAGE_SIZE + available_slot * Memory::TLS_ENTRY_SIZE;
}
void Process::FreeTLSSlot(VAddr tls_address) {
const VAddr tls_base = tls_address - vm_manager.GetTLSIORegionBaseAddress();
const VAddr tls_page = tls_base / Memory::PAGE_SIZE;
const VAddr tls_slot = (tls_base % Memory::PAGE_SIZE) / Memory::TLS_ENTRY_SIZE;
tls_slots[tls_page].reset(tls_slot);
}
void Process::LoadModule(SharedPtr<CodeSet> module_, VAddr base_addr) {
const auto MapSegment = [&](CodeSet::Segment& segment, VMAPermission permissions,
MemoryState memory_state) {
auto vma = vm_manager
.MapMemoryBlock(segment.addr + base_addr, module_->memory, segment.offset,
segment.size, memory_state)
.Unwrap();
vm_manager.Reprotect(vma, permissions);
};
// Map CodeSet segments
MapSegment(module_->CodeSegment(), VMAPermission::ReadExecute, MemoryState::CodeStatic);
MapSegment(module_->RODataSegment(), VMAPermission::Read, MemoryState::CodeMutable);
MapSegment(module_->DataSegment(), VMAPermission::ReadWrite, MemoryState::CodeMutable);
}
ResultVal<VAddr> Process::HeapAllocate(VAddr target, u64 size, VMAPermission perms) {
if (target < vm_manager.GetHeapRegionBaseAddress() ||
target + size > vm_manager.GetHeapRegionEndAddress() || target + size < target) {
return ERR_INVALID_ADDRESS;
}
if (heap_memory == nullptr) {
// Initialize heap
heap_memory = std::make_shared<std::vector<u8>>();
heap_start = heap_end = target;
} else {
vm_manager.UnmapRange(heap_start, heap_end - heap_start);
}
// If necessary, expand backing vector to cover new heap extents.
if (target < heap_start) {
heap_memory->insert(begin(*heap_memory), heap_start - target, 0);
heap_start = target;
vm_manager.RefreshMemoryBlockMappings(heap_memory.get());
}
if (target + size > heap_end) {
heap_memory->insert(end(*heap_memory), (target + size) - heap_end, 0);
heap_end = target + size;
vm_manager.RefreshMemoryBlockMappings(heap_memory.get());
}
ASSERT(heap_end - heap_start == heap_memory->size());
CASCADE_RESULT(auto vma, vm_manager.MapMemoryBlock(target, heap_memory, target - heap_start,
size, MemoryState::Heap));
vm_manager.Reprotect(vma, perms);
heap_used = size;
return MakeResult<VAddr>(heap_end - size);
}
ResultCode Process::HeapFree(VAddr target, u32 size) {
if (target < vm_manager.GetHeapRegionBaseAddress() ||
target + size > vm_manager.GetHeapRegionEndAddress() || target + size < target) {
return ERR_INVALID_ADDRESS;
}
if (size == 0) {
return RESULT_SUCCESS;
}
ResultCode result = vm_manager.UnmapRange(target, size);
if (result.IsError())
return result;
heap_used -= size;
return RESULT_SUCCESS;
}
ResultCode Process::MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size) {
auto vma = vm_manager.FindVMA(src_addr);
ASSERT_MSG(vma != vm_manager.vma_map.end(), "Invalid memory address");
ASSERT_MSG(vma->second.backing_block, "Backing block doesn't exist for address");
// The returned VMA might be a bigger one encompassing the desired address.
auto vma_offset = src_addr - vma->first;
ASSERT_MSG(vma_offset + size <= vma->second.size,
"Shared memory exceeds bounds of mapped block");
const std::shared_ptr<std::vector<u8>>& backing_block = vma->second.backing_block;
std::size_t backing_block_offset = vma->second.offset + vma_offset;
CASCADE_RESULT(auto new_vma,
vm_manager.MapMemoryBlock(dst_addr, backing_block, backing_block_offset, size,
MemoryState::Mapped));
// Protect mirror with permissions from old region
vm_manager.Reprotect(new_vma, vma->second.permissions);
// Remove permissions from old region
vm_manager.Reprotect(vma, VMAPermission::None);
return RESULT_SUCCESS;
}
ResultCode Process::UnmapMemory(VAddr dst_addr, VAddr /*src_addr*/, u64 size) {
return vm_manager.UnmapRange(dst_addr, size);
}
Kernel::Process::Process(KernelCore& kernel) : Object{kernel} {}
Kernel::Process::~Process() {}
} // namespace Kernel
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