nso: Return an optional address from LoadModule

If a malformed NSO is attempted to be loaded, we shouldn't continue
onwards. We should be reporting an error and bailing out.
This commit is contained in:
Lioncash 2018-10-14 21:41:58 -04:00
parent bb9cf8a127
commit bed872ed38
5 changed files with 29 additions and 16 deletions

View file

@ -139,15 +139,23 @@ ResultStatus AppLoader_DeconstructedRomDirectory::Load(Kernel::Process& process)
for (const auto& module : {"rtld", "main", "subsdk0", "subsdk1", "subsdk2", "subsdk3",
"subsdk4", "subsdk5", "subsdk6", "subsdk7", "sdk"}) {
const FileSys::VirtualFile module_file = dir->GetFile(module);
if (module_file != nullptr) {
if (module_file == nullptr) {
continue;
}
const VAddr load_addr = next_load_addr;
next_load_addr = AppLoader_NSO::LoadModule(*module_file, load_addr,
std::strcmp(module, "rtld") == 0, pm);
const bool should_pass_arguments = std::strcmp(module, "rtld") == 0;
const auto tentative_next_load_addr =
AppLoader_NSO::LoadModule(*module_file, load_addr, should_pass_arguments, pm);
if (!tentative_next_load_addr) {
return ResultStatus::ErrorLoadingNSO;
}
next_load_addr = *tentative_next_load_addr;
LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", module, load_addr);
// Register module with GDBStub
GDBStub::RegisterModule(module, load_addr, next_load_addr - 1, false);
}
}
process.Run(base_address, metadata.GetMainThreadPriority(), metadata.GetMainThreadStackSize());

View file

@ -93,7 +93,7 @@ std::string GetFileTypeString(FileType type) {
return "unknown";
}
constexpr std::array<const char*, 59> RESULT_MESSAGES{
constexpr std::array<const char*, 60> RESULT_MESSAGES{
"The operation completed successfully.",
"The loader requested to load is already loaded.",
"The operation is not implemented.",
@ -128,6 +128,7 @@ constexpr std::array<const char*, 59> RESULT_MESSAGES{
"The RomFS could not be found.",
"The ELF file has incorrect size as determined by the header.",
"There was a general error loading the NRO into emulated memory.",
"There was a general error loading the NSO into emulated memory.",
"There is no icon available.",
"There is no control data available.",
"The NAX file has a bad header.",

View file

@ -90,6 +90,7 @@ enum class ResultStatus : u16 {
ErrorNoRomFS,
ErrorIncorrectELFFileSize,
ErrorLoadingNRO,
ErrorLoadingNSO,
ErrorNoIcon,
ErrorNoControl,
ErrorBadNAXHeader,

View file

@ -93,9 +93,9 @@ static constexpr u32 PageAlignSize(u32 size) {
return (size + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
}
VAddr AppLoader_NSO::LoadModule(const FileSys::VfsFile& file, VAddr load_base,
std::optional<VAddr> AppLoader_NSO::LoadModule(const FileSys::VfsFile& file, VAddr load_base,
bool should_pass_arguments,
boost::optional<FileSys::PatchManager> pm) {
std::optional<FileSys::PatchManager> pm) {
if (file.GetSize() < sizeof(NsoHeader))
return {};
@ -154,7 +154,7 @@ VAddr AppLoader_NSO::LoadModule(const FileSys::VfsFile& file, VAddr load_base,
program_image.resize(image_size);
// Apply patches if necessary
if (pm != boost::none && pm->HasNSOPatch(nso_header.build_id)) {
if (pm && pm->HasNSOPatch(nso_header.build_id)) {
std::vector<u8> pi_header(program_image.size() + 0x100);
std::memcpy(pi_header.data(), &nso_header, sizeof(NsoHeader));
std::memcpy(pi_header.data() + 0x100, program_image.data(), program_image.size());
@ -181,7 +181,9 @@ ResultStatus AppLoader_NSO::Load(Kernel::Process& process) {
// Load module
const VAddr base_address = process.VMManager().GetCodeRegionBaseAddress();
LoadModule(*file, base_address, true);
if (!LoadModule(*file, base_address, true)) {
return ResultStatus::ErrorLoadingNSO;
}
LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", file->GetName(), base_address);
process.Run(base_address, Kernel::THREADPRIO_DEFAULT, Memory::DEFAULT_STACK_SIZE);

View file

@ -4,6 +4,7 @@
#pragma once
#include <optional>
#include "common/common_types.h"
#include "core/file_sys/patch_manager.h"
#include "core/loader/linker.h"
@ -36,9 +37,9 @@ public:
return IdentifyType(file);
}
static VAddr LoadModule(const FileSys::VfsFile& file, VAddr load_base,
static std::optional<VAddr> LoadModule(const FileSys::VfsFile& file, VAddr load_base,
bool should_pass_arguments,
boost::optional<FileSys::PatchManager> pm = boost::none);
std::optional<FileSys::PatchManager> pm = {});
ResultStatus Load(Kernel::Process& process) override;
};