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Code Issues Releases Activity

Attempt to fix crashes in SSBU and refactor IsValidNRO

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VolcaEM 2020-06-14 19:28:39 +02:00 committed by GitHub
parent dfd1badc12
commit 151a3fe7b3
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1 changed files with 59 additions and 36 deletions
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95
src/core/hle/service/ldr/ldr.cpp
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@ -39,22 +39,27 @@ constexpr ResultCode ERROR_NOT_INITIALIZED{ErrorModule::Loader, 87};
constexpr std::size_t MAXIMUM_LOADED_RO{0x40};
constexpr std::size_t MAXIMUM_MAP_RETRIES{0x200};
struct Certification {
constexpr std::size_t TEXT_INDEX{0};
constexpr std::size_t RO_INDEX{1};
constexpr std::size_t DATA_INDEX{2};
struct NRRCertification {
u64_le application_id_mask;
u64_le application_id_pattern;
std::array<u8, 0x10> reserved;
std::array<u8, 0x100> public_key; // Also known as modulus
std::array<u8, 0x100> signature;
};
static_assert(sizeof(Certification) == 0x220, "Certification has invalid size!");
static_assert(sizeof(NRRCertification) == 0x220, "Certification has invalid size!");
using SHA256Hash = std::array<u8, 0x20>;
#pragma pack(1)
struct NRRHeader {
u32_le magic;
u32_le certification_signature_key_generation; // 9.0.0+
u64_le reserved;
Certification certification;
NRRCertification certification;
std::array<u8, 0x100> signature;
u64_le application_id;
u32_le size;
@ -63,21 +68,19 @@ struct NRRHeader {
u32_le hash_offset;
u32_le hash_count;
u64_le reserved_3;
// Must be dynamically allocated because, according to
// SwitchBrew, its size is (0x20 * hash_count) and
// it's impossible to determine the value of hash_count
// (SwitchBrew calls it "NumHash") before runtime,
// therefore it's not possible to calculate a SHA-256
std::vector<SHA256Hash> NroHashList;
};
#pragma pack()
static_assert(sizeof(NRRHeader) == 0x350, "NRRHeader has invalid size!");
#pragma pack(1)
struct SegmentHeader {
u32_le memory_offset;
u32_le memory_size;
};
#pragma pack()
static_assert(sizeof(SegmentHeader) == 0x8, "SegmentHeader has invalid size!");
#pragma pack(1)
struct NROHeader {
// Switchbrew calls this "Start" (0x10)
u32_le unused;
@ -99,8 +102,10 @@ struct NROHeader {
// .apiInfo, .dynstr, .dynsym
std::array<SegmentHeader, 3> segment_headers_2;
};
#pragma pack()
static_assert(sizeof(NROHeader) == 0x80, "NROHeader has invalid size.");
#pragma pack(1)
struct NROInfo {
SHA256Hash hash{};
VAddr nro_address{};
@ -112,6 +117,8 @@ struct NROInfo {
std::size_t data_size{};
VAddr src_addr{};
};
#pragma pack()
static_assert(sizeof(NROInfo) == 0x60, "NROInfo has invalid size.");
class DebugMonitor final : public ServiceFramework<DebugMonitor> {
public:
@ -369,10 +376,10 @@ public:
ResultCode LoadNro(Kernel::Process* process, const NROHeader& nro_header, VAddr nro_addr,
VAddr start) const {
const VAddr text_start{start + nro_header.segment_headers[0].memory_offset};
const VAddr ro_start{start + nro_header.segment_headers[1].memory_offset};
const VAddr data_start{start + nro_header.segment_headers[2].memory_offset};
const VAddr bss_start{data_start + nro_header.segment_headers[2].memory_size};
const VAddr text_start{start + nro_header.segment_headers[TEXT_INDEX].memory_offset};
const VAddr ro_start{start + nro_header.segment_headers[RO_INDEX].memory_offset};
const VAddr data_start{start + nro_header.segment_headers[DATA_INDEX].memory_offset};
const VAddr bss_start{data_start + nro_header.segment_headers[DATA_INDEX].memory_size};
const VAddr bss_end_addr{
Common::AlignUp(bss_start + nro_header.bss_size, Kernel::Memory::PageSize)};
@ -381,12 +388,12 @@ public:
system.Memory().ReadBlock(src_addr, source_data.data(), source_data.size());
system.Memory().WriteBlock(dst_addr, source_data.data(), source_data.size());
}};
CopyCode(nro_addr + nro_header.segment_headers[0].memory_offset, text_start,
nro_header.segment_headers[0].memory_size);
CopyCode(nro_addr + nro_header.segment_headers[1].memory_offset, ro_start,
nro_header.segment_headers[1].memory_size);
CopyCode(nro_addr + nro_header.segment_headers[2].memory_offset, data_start,
nro_header.segment_headers[2].memory_size);
CopyCode(nro_addr + nro_header.segment_headers[TEXT_INDEX].memory_offset, text_start,
nro_header.segment_headers[TEXT_INDEX].memory_size);
CopyCode(nro_addr + nro_header.segment_headers[RO_INDEX].memory_offset, ro_start,
nro_header.segment_headers[RO_INDEX].memory_size);
CopyCode(nro_addr + nro_header.segment_headers[DATA_INDEX].memory_offset, data_start,
nro_header.segment_headers[DATA_INDEX].memory_size);
CASCADE_CODE(process->PageTable().SetCodeMemoryPermission(
text_start, ro_start - text_start, Kernel::Memory::MemoryPermission::ReadAndExecute));
@ -510,9 +517,9 @@ public:
// Track the loaded NRO
nro.insert_or_assign(*map_result,
NROInfo{hash, *map_result, nro_size, bss_address, bss_size,
header.segment_headers[0].memory_size,
header.segment_headers[1].memory_size,
header.segment_headers[2].memory_size, nro_address});
header.segment_headers[TEXT_INDEX].memory_size,
header.segment_headers[RO_INDEX].memory_size,
header.segment_headers[DATA_INDEX].memory_size, nro_address});
// Invalidate JIT caches for the newly mapped process code
system.InvalidateCpuInstructionCaches();
@ -608,19 +615,35 @@ private:
}
static bool IsValidNRO(const NROHeader& header, u64 nro_size, u64 bss_size) {
return header.magic == Common::MakeMagic('N', 'R', 'O', '0') &&
header.nro_size == nro_size && header.bss_size == bss_size &&
header.segment_headers[1].memory_offset ==
header.segment_headers[0].memory_offset +
header.segment_headers[0].memory_size &&
header.segment_headers[2].memory_offset ==
header.segment_headers[1].memory_offset +
header.segment_headers[1].memory_size &&
nro_size == header.segment_headers[2].memory_offset +
header.segment_headers[2].memory_size &&
Common::Is4KBAligned(header.segment_headers[0].memory_size) &&
Common::Is4KBAligned(header.segment_headers[1].memory_size) &&
Common::Is4KBAligned(header.segment_headers[2].memory_size);
const bool valid_magic = header.magic == Common::MakeMagic('N', 'R', 'O', '0');
const bool valid_nro_size = header.nro_size == nro_size;
const bool valid_bss_size = header.bss_size == bss_size;
const bool valid_ro_offset = header.segment_headers[RO_INDEX].memory_offset ==
header.segment_headers[TEXT_INDEX].memory_offset +
header.segment_headers[TEXT_INDEX].memory_size;
const bool valid_rw_offset = header.segment_headers[DATA_INDEX].memory_offset ==
header.segment_headers[RO_INDEX].memory_offset +
header.segment_headers[RO_INDEX].memory_size;
const bool valid_nro_calculated_size =
nro_size == header.segment_headers[DATA_INDEX].memory_offset +
header.segment_headers[DATA_INDEX].memory_size;
const bool text_aligned =
Common::Is4KBAligned(header.segment_headers[TEXT_INDEX].memory_size);
const bool ro_aligned = Common::Is4KBAligned(header.segment_headers[RO_INDEX].memory_size);
const bool rw_aligned =
Common::Is4KBAligned(header.segment_headers[DATA_INDEX].memory_size);
return valid_magic && valid_nro_size && valid_bss_size && valid_ro_offset &&
valid_rw_offset && valid_nro_calculated_size && text_aligned && ro_aligned && rw_aligned;
}
Core::System& system;
};