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suyu/src/core/hle/kernel/process.cpp

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// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_funcs.h"
#include "common/logging/log.h"
#include "common/make_unique.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/resource_limit.h"
#include "core/hle/kernel/thread.h"
#include "core/hle/kernel/vm_manager.h"
#include "core/mem_map.h"
#include "core/memory.h"
namespace Kernel {
SharedPtr<CodeSet> CodeSet::Create(std::string name, u64 program_id) {
SharedPtr<CodeSet> codeset(new CodeSet);
codeset->name = std::move(name);
codeset->program_id = program_id;
return codeset;
}
CodeSet::CodeSet() {}
CodeSet::~CodeSet() {}
u32 Process::next_process_id;
SharedPtr<Process> Process::Create(SharedPtr<CodeSet> code_set) {
SharedPtr<Process> process(new Process);
process->codeset = std::move(code_set);
process->flags.raw = 0;
process->flags.memory_region = MemoryRegion::APPLICATION;
Memory::InitLegacyAddressSpace(process->vm_manager);
return process;
}
void Process::ParseKernelCaps(const u32* kernel_caps, size_t len) {
for (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;
mapping.size = (end_desc << 12) - mapping.address;
mapping.writable = (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.writable = true; // TODO: Not sure if correct
mapping.unk_flag = false;
} else if ((type & 0xFE0) == 0xFC0) { // 0x01FF
// Kernel version
int minor = descriptor & 0xFF;
int major = (descriptor >> 8) & 0xFF;
LOG_INFO(Loader, "ExHeader kernel version ignored: %d.%d", major, minor);
} else {
LOG_ERROR(Loader, "Unhandled kernel caps descriptor: 0x%08X", descriptor);
}
}
}
void Process::Run(s32 main_thread_priority, u32 stack_size) {
auto MapSegment = [&](CodeSet::Segment& segment, VMAPermission permissions, MemoryState memory_state) {
auto vma = vm_manager.MapMemoryBlock(segment.addr, codeset->memory,
segment.offset, segment.size, memory_state).Unwrap();
vm_manager.Reprotect(vma, permissions);
};
// Map CodeSet segments
MapSegment(codeset->code, VMAPermission::ReadExecute, MemoryState::Code);
MapSegment(codeset->rodata, VMAPermission::Read, MemoryState::Code);
MapSegment(codeset->data, VMAPermission::ReadWrite, MemoryState::Private);
// Allocate and map stack
vm_manager.MapMemoryBlock(Memory::HEAP_VADDR_END - stack_size,
std::make_shared<std::vector<u8>>(stack_size, 0), 0, stack_size, MemoryState::Locked
).Unwrap();
vm_manager.LogLayout(Log::Level::Debug);
Kernel::SetupMainThread(codeset->entrypoint, main_thread_priority);
}
ResultVal<VAddr> Process::HeapAllocate(VAddr target, u32 size, VMAPermission perms) {
if (target < Memory::HEAP_VADDR || target + size > Memory::HEAP_VADDR_END || 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;
}
// 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::Private));
vm_manager.Reprotect(vma, perms);
return MakeResult<VAddr>(heap_end - size);
}
ResultCode Process::HeapFree(VAddr target, u32 size) {
if (target < Memory::HEAP_VADDR || target + size > Memory::HEAP_VADDR_END || target + size < target) {
return ERR_INVALID_ADDRESS;
}
ResultCode result = vm_manager.UnmapRange(target, size);
if (result.IsError()) return result;
return RESULT_SUCCESS;
}
ResultVal<VAddr> Process::LinearAllocate(VAddr target, u32 size, VMAPermission perms) {
if (linear_heap_memory == nullptr) {
// Initialize heap
linear_heap_memory = std::make_shared<std::vector<u8>>();
}
VAddr heap_end = Memory::LINEAR_HEAP_VADDR + (u32)linear_heap_memory->size();
// Games and homebrew only ever seem to pass 0 here (which lets the kernel decide the address),
// but explicit addresses are also accepted and respected.
if (target == 0) {
target = heap_end;
}
if (target < Memory::LINEAR_HEAP_VADDR || target + size > Memory::LINEAR_HEAP_VADDR_END ||
target > heap_end || target + size < target) {
return ERR_INVALID_ADDRESS;
}
// Expansion of the linear heap is only allowed if you do an allocation immediatelly at its
// end. It's possible to free gaps in the middle of the heap and then reallocate them later,
// but expansions are only allowed at the end.
if (target == heap_end) {
linear_heap_memory->insert(linear_heap_memory->end(), size, 0);
vm_manager.RefreshMemoryBlockMappings(linear_heap_memory.get());
}
size_t offset = target - Memory::LINEAR_HEAP_VADDR;
CASCADE_RESULT(auto vma, vm_manager.MapMemoryBlock(target, linear_heap_memory, offset, size, MemoryState::Continuous));
vm_manager.Reprotect(vma, perms);
return MakeResult<VAddr>(target);
}
ResultCode Process::LinearFree(VAddr target, u32 size) {
if (linear_heap_memory == nullptr || target < Memory::LINEAR_HEAP_VADDR ||
target + size > Memory::LINEAR_HEAP_VADDR_END || target + size < target) {
return ERR_INVALID_ADDRESS;
}
VAddr heap_end = Memory::LINEAR_HEAP_VADDR + (u32)linear_heap_memory->size();
if (target + size > heap_end) {
return ERR_INVALID_ADDRESS_STATE;
}
ResultCode result = vm_manager.UnmapRange(target, size);
if (result.IsError()) return result;
if (target + size == heap_end) {
// End of linear heap has been freed, so check what's the last allocated block in it and
// reduce the size.
auto vma = vm_manager.FindVMA(target);
ASSERT(vma != vm_manager.vma_map.end());
ASSERT(vma->second.type == VMAType::Free);
VAddr new_end = vma->second.base;
if (new_end >= Memory::LINEAR_HEAP_VADDR) {
linear_heap_memory->resize(new_end - Memory::LINEAR_HEAP_VADDR);
}
}
return RESULT_SUCCESS;
}
Kernel::Process::Process() {}
Kernel::Process::~Process() {}
SharedPtr<Process> g_current_process;
}