From 8c8c98e919afd1d7df8e3d905654ecfc3281b5c8 Mon Sep 17 00:00:00 2001 From: Subv Date: Sun, 31 May 2015 09:56:40 -0500 Subject: [PATCH] Services/LDR: Initial CRO support. Lots of unks --- src/core/hle/service/ldr_ro.cpp | 499 +++++++++++++++++++++++++++++++- 1 file changed, 496 insertions(+), 3 deletions(-) diff --git a/src/core/hle/service/ldr_ro.cpp b/src/core/hle/service/ldr_ro.cpp index ecec2ce32..cea1dc3f6 100644 --- a/src/core/hle/service/ldr_ro.cpp +++ b/src/core/hle/service/ldr_ro.cpp @@ -6,12 +6,483 @@ #include "common/logging/log.h" #include "core/hle/service/ldr_ro.h" +#include "common/file_util.h" //////////////////////////////////////////////////////////////////////////////////////////////////// // Namespace LDR_RO namespace LDR_RO { +struct SegmentTableEntry { + u32 segment_offset; + u32 segment_size; + u32 segment_id; +}; + +struct Patch { + u32 offset; + u8 type; + u8 unk; + u8 unk2; + u8 unk3; + u32 x; + + u8 GetTargetSegment() { return offset & 0xF; } + u32 GetSegmentOffset() { return offset >> 4; } +}; + +struct Unk3Patch { + u32 segment_offset; + u32 patches_offset; + + u8 GetTargetSegment() { return segment_offset & 0xF; } + u32 GetSegmentOffset() { return segment_offset >> 4; } +}; + +struct Unk2TableEntry { + u32 offset_or_index; ///< Index in the CRO's segment offset table (unk1) for table1 entries, or segment_offset for table2 entries + u32 patches_offset; +}; + +struct Unk2Patch { + u32 string_offset; + u32 table1_offset; + u32 table1_num; + u32 table2_offset; + u32 table2_num; + + Unk2TableEntry* GetTable1Entry(u32 index); + Unk2TableEntry* GetTable2Entry(u32 index); +}; + +Unk2TableEntry* Unk2Patch::GetTable1Entry(u32 index) { + return reinterpret_cast(Memory::GetPointer(table1_offset) + sizeof(Unk2TableEntry) * index); +} + +Unk2TableEntry* Unk2Patch::GetTable2Entry(u32 index) { + return reinterpret_cast(Memory::GetPointer(table2_offset) + sizeof(Unk2TableEntry) * index); +} + +struct ExportTableEntry { + u32 name_offset; + u32 segment_offset; + + u8 GetTargetSegment() { return segment_offset & 0xF; } + u32 GetSegmentOffset() { return segment_offset >> 4; } +}; + +struct ImportTableEntry { + u32 name_offset; + u32 symbol_offset; +}; + +struct ExportedSymbol { + std::string name; + u32 cro_base; + u32 cro_offset; +}; + +struct CROHeader { + u8 sha2_hash[0x80]; + char magic[4]; + u32 name_offset; + u32 previous_cro; + u32 next_cro; + u32 file_size; + INSERT_PADDING_WORDS(0x6); + u32 segment_offset; + u32 code_offset; + u32 code_size; + u32 unk_offset; + u32 unk_size; + u32 module_name_offset; + u32 module_name_size; + u32 segment_table_offset; + u32 segment_table_num; + u32 export_table_offset; + u32 export_table_num; + u32 unk1_offset; + u32 unk1_size; + u32 export_strings_offset; + u32 export_strings_num; + u32 export_tree_offset; + u32 export_tree_num; + u32 unk2_offset; + u32 unk2_num; + u32 import_patches_offset; + u32 import_patches_num; + u32 import_table1_offset; + u32 import_table1_num; + u32 import_table2_offset; + u32 import_table2_num; + u32 import_table3_offset; + u32 import_table3_num; + u32 import_strings_offset; + u32 import_strings_num; + u32 unk3_offset; + u32 unk3_num; + u32 relocation_patches_offset; + u32 relocation_patches_num; + u32 unk4_offset; /// More patches? + u32 unk4_num; + + u8 GetImportPatchesTargetSegment() { return segment_offset & 0xF; } + u8 GetImportPatchesSegmentOffset() { return segment_offset >> 4; } + + SegmentTableEntry* GetSegmentTableEntry(u32 index, bool relocated = false); + void RelocateSegmentsTable(u32 base, u32 data_section0, u32 data_section1); + + ExportTableEntry* GetExportTableEntry(u32 index); + void RelocateExportsTable(u32 base); + + Patch* GetImportPatch(u32 index); + + ImportTableEntry* GetImportTable1Entry(u32 index); + void RelocateImportTable1(u32 base); + + ImportTableEntry* GetImportTable2Entry(u32 index); + void RelocateImportTable2(u32 base); + + ImportTableEntry* GetImportTable3Entry(u32 index); + void RelocateImportTable3(u32 base); + + Unk3Patch* GetUnk3PatchEntry(u32 index); + + Patch* GetRelocationPatchEntry(u32 index); + + Unk2Patch* GetUnk2PatchEntry(u32 index); + + u32 GetUnk1TableEntry(u32 index); + + void RelocateUnk2Patches(u32 base); + + void RelocateOffsets(u32 base); +}; + +static std::unordered_map loaded_exports; +static std::vector loaded_cros; + +SegmentTableEntry* CROHeader::GetSegmentTableEntry(u32 index, bool relocated) { + if (relocated) + return reinterpret_cast(Memory::GetPointer(segment_table_offset + sizeof(SegmentTableEntry) * index)); + + return reinterpret_cast(reinterpret_cast(this) + segment_table_offset + sizeof(SegmentTableEntry) * index); +} + +void CROHeader::RelocateSegmentsTable(u32 base, u32 data_section0, u32 data_section1) { + for (int i = 0; i < segment_table_num; ++i) { + SegmentTableEntry* entry = GetSegmentTableEntry(i); + if (entry->segment_id == 2) { + entry->segment_offset = data_section0; + } else if (entry->segment_id == 3) { + entry->segment_offset = data_section1; + } else if (entry->segment_offset) { + entry->segment_offset += base; + } + } +} + +u32 CROHeader::GetUnk1TableEntry(u32 index) { + return *reinterpret_cast(reinterpret_cast(this) + unk1_offset + sizeof(u32) * index); +} + +ExportTableEntry* CROHeader::GetExportTableEntry(u32 index) { + return reinterpret_cast(reinterpret_cast(this) + export_table_offset + sizeof(ExportTableEntry) * index); +} + +void CROHeader::RelocateExportsTable(u32 base) { + for (int i = 0; i < export_table_num; ++i) { + ExportTableEntry* entry = GetExportTableEntry(i); + if (entry->name_offset) + entry->name_offset += base; + } +} + +Patch* CROHeader::GetImportPatch(u32 index) { + return reinterpret_cast(reinterpret_cast(this) + import_patches_offset + sizeof(Patch) * index); +} + +ImportTableEntry* CROHeader::GetImportTable1Entry(u32 index) { + return reinterpret_cast(reinterpret_cast(this) + import_table1_offset + sizeof(ImportTableEntry) * index); +} + +ImportTableEntry* CROHeader::GetImportTable2Entry(u32 index) { + return reinterpret_cast(reinterpret_cast(this) + import_table2_offset + sizeof(ImportTableEntry) * index); +} + +ImportTableEntry* CROHeader::GetImportTable3Entry(u32 index) { + return reinterpret_cast(reinterpret_cast(this) + import_table3_offset + sizeof(ImportTableEntry) * index); +} + +void CROHeader::RelocateImportTable1(u32 base) { + for (int i = 0; i < import_table1_num; ++i) { + ImportTableEntry* entry = GetImportTable1Entry(i); + if (entry->name_offset) + entry->name_offset += base; + if (entry->symbol_offset) + entry->symbol_offset += base; + } +} + +void CROHeader::RelocateImportTable2(u32 base) { + for (int i = 0; i < import_table2_num; ++i) { + ImportTableEntry* entry = GetImportTable2Entry(i); + if (entry->symbol_offset) + entry->symbol_offset += base; + } +} + +void CROHeader::RelocateImportTable3(u32 base) { + for (int i = 0; i < import_table3_num; ++i) { + ImportTableEntry* entry = GetImportTable3Entry(i); + if (entry->symbol_offset) + entry->symbol_offset += base; + } +} + +void CROHeader::RelocateUnk2Patches(u32 base) { + for (int i = 0; i < unk2_num; ++i) { + Unk2Patch* entry = GetUnk2PatchEntry(i); + if (entry->string_offset) + entry->string_offset += base; + if (entry->table1_offset) + entry->table1_offset += base; + if (entry->table2_offset) + entry->table2_offset += base; + } +} + +Unk3Patch* CROHeader::GetUnk3PatchEntry(u32 index) { + return reinterpret_cast(reinterpret_cast(this) + unk3_offset * sizeof(Unk3Patch) * index); +} + +Patch* CROHeader::GetRelocationPatchEntry(u32 index) { + return reinterpret_cast(reinterpret_cast(this) + relocation_patches_offset + sizeof(Patch) * index); +} + +Unk2Patch* CROHeader::GetUnk2PatchEntry(u32 index) { + return reinterpret_cast(reinterpret_cast(this) + unk2_offset + sizeof(Unk2Patch) * index); +} + +void CROHeader::RelocateOffsets(u32 base) { + segment_table_offset += base; + export_strings_offset += base; + export_table_offset += base; + export_tree_offset += base; + name_offset += base; + unk_offset += base; +} + +static void ApplyPatch(Patch* patch, u32 patch_base, u32 patch_address) { + switch (patch->type) { + case 2: + Memory::Write32(patch_address, patch_base + patch->x); + break; + default: + LOG_CRITICAL(Service_APT, "Unknown patch type %u", patch->type); + } +} + +static void ApplyImportPatches(CROHeader* header, u32 base) { + SegmentTableEntry* base_segment = header->GetSegmentTableEntry(header->GetImportPatchesTargetSegment()); + u32 patch_base = base_segment->segment_offset + header->GetImportPatchesSegmentOffset(); + for (int i = 0; i < header->import_patches_num; ++i) { + Patch* patch = header->GetImportPatch(i); + SegmentTableEntry* target_segment = header->GetSegmentTableEntry(patch->GetTargetSegment()); + ApplyPatch(patch, patch_base, target_segment->segment_offset + patch->GetSegmentOffset()); + } +} + +static void ApplyListPatches(CROHeader* header, Patch* first_patch, u32 patch_base) { + Patch* current_patch = first_patch; + + do { + SegmentTableEntry* target_segment = header->GetSegmentTableEntry(current_patch->GetTargetSegment()); + ApplyPatch(current_patch, patch_base, target_segment->segment_offset + current_patch->GetSegmentOffset()); + } while (!(current_patch++)->unk); + + first_patch->unk2 = 1; +} + +static void ApplyUnk3Patches(CROHeader* header, u32 base) { + for (int i = 0; i < header->unk3_num; ++i) { + Unk3Patch* patch = header->GetUnk3PatchEntry(i); + SegmentTableEntry* segment = header->GetSegmentTableEntry(patch->GetTargetSegment()); + u32 patch_base = segment->segment_offset + patch->GetSegmentOffset(); + u32 patches_table = base + patch->patches_offset; + + Patch* first_patch = reinterpret_cast(Memory::GetPointer(patches_table)); + ApplyListPatches(header, first_patch, patch_base); + } +} + +static void ApplyRelocationPatches(CROHeader* header, u32 base) { + for (int i = 0; i < header->relocation_patches_num; ++i) { + Patch* patch = header->GetRelocationPatchEntry(i); + u32 segment_id = patch->GetTargetSegment(); + SegmentTableEntry* target_segment = header->GetSegmentTableEntry(segment_id); + SegmentTableEntry* base_segment = header->GetSegmentTableEntry(patch->unk); + u32 patch_address = target_segment->segment_offset + patch->GetSegmentOffset(); + ApplyPatch(patch, base_segment->segment_offset, patch_address); + } +} + +static void ApplyExitPatches(CROHeader* header, u32 base) { + // Find the "__aeabi_atexit" in the import table 1 + for (int i = 0; i < header->import_table1_num; ++i) { + ImportTableEntry* entry = header->GetImportTable1Entry(i); + // The name is already relocated + char* entry_name = reinterpret_cast(Memory::GetPointer(entry->name_offset)); + if (!strcmp(entry_name, "__aeabi_atexit")) { + // Only apply these patches if some previous CRO exports "nnroAeabiAtexit_" + auto export = loaded_exports.find("nnroAeabiAtexit_"); + if (export == loaded_exports.end()) + return; + + // Patch it! + Patch* first_patch = reinterpret_cast(Memory::GetPointer(entry->symbol_offset)); + ApplyListPatches(header, first_patch, export->second.cro_offset); + return; + } + } + LOG_ERROR(Service_LDR, "Could not find __aeabi_atexit in the CRO imports!"); +} + +static void ApplyImportTable1Patches(CROHeader* header, u32 base, bool relocated) { + for (int i = 0; i < header->import_table1_num; ++i) { + ImportTableEntry* entry = header->GetImportTable1Entry(i); + Patch* patch = reinterpret_cast(Memory::GetPointer(entry->symbol_offset)); + if (!patch->unk2) { + // The name offset is already relocated + std::string entry_name = reinterpret_cast(Memory::GetPointer(entry->name_offset)); + auto export = loaded_exports.find(entry_name); + if (export == loaded_exports.end()) + continue; + + u32 patch_base = export->second.cro_offset; + + Patch* first_patch = reinterpret_cast(Memory::GetPointer(entry->symbol_offset)); + ApplyListPatches(header, first_patch, patch_base); + } + } +} + +static u32 GetCROBaseByName(char* name) { + for (u32 base : loaded_cros) { + CROHeader* header = reinterpret_cast(Memory::GetPointer(base)); + if (!strcmp(reinterpret_cast(header) + header->name_offset, name)) + return base; + } + return 0; +} + +static void ApplyUnk2Patches(CROHeader* header, u32 base, bool relocated) { + for (int i = 0; i < header->unk2_num; ++i) { + Unk2Patch* entry = header->GetUnk2PatchEntry(i); + u32 cro_base = GetCROBaseByName(reinterpret_cast(Memory::GetPointer(entry->string_offset))); + if (cro_base == 0) + continue; + + CROHeader* patch_cro = reinterpret_cast(Memory::GetPointer(cro_base)); + // Apply the patches from the first table + for (int j = 0; j < entry->table1_num; ++j) { + Unk2TableEntry* table1_entry = entry->GetTable1Entry(j); + u32 unk1_table_entry = header->GetUnk1TableEntry(table1_entry->offset_or_index); + u32 target_segment_id = unk1_table_entry & 0xF; + u32 target_segment_offset = unk1_table_entry >> 4; + SegmentTableEntry* target_base_segment = patch_cro->GetSegmentTableEntry(target_segment_id, relocated); + + Patch* first_patch = reinterpret_cast(Memory::GetPointer(base + table1_entry->patches_offset)); + ApplyListPatches(header, first_patch, target_base_segment->segment_offset + target_segment_offset); + } + + // Apply the patches from the second table + for (int j = 0; j < entry->table2_num; ++j) { + Unk2TableEntry* table2_entry = entry->GetTable2Entry(j); + u32 target_segment_id = table2_entry->offset_or_index & 0xF; + u32 target_segment_offset = table2_entry->offset_or_index >> 4; + SegmentTableEntry* target_base_segment = patch_cro->GetSegmentTableEntry(target_segment_id, relocated); + + Patch* first_patch = reinterpret_cast(Memory::GetPointer(base + table2_entry->patches_offset)); + ApplyListPatches(header, first_patch, target_base_segment->segment_offset + target_segment_offset); + } + } +} + +static void LoadExportsTable(CROHeader* header, u32 base) { + for (int i = 0; i < header->export_table_num; ++i) { + ExportTableEntry* entry = header->GetExportTableEntry(i); + SegmentTableEntry* target_segment = header->GetSegmentTableEntry(entry->GetTargetSegment()); + ExportedSymbol export; + export.cro_base = base; + export.cro_offset = target_segment->segment_offset + entry->GetSegmentOffset(); + export.name = reinterpret_cast(Memory::GetPointer(entry->name_offset)); + loaded_exports[export.name] = export; + } +} + +static void LoadCRO(u32 base, u8* cro, bool relocate_segments, u32 data_section0, u32 data_section1) { + CROHeader* header = reinterpret_cast(cro); + memcpy(header->magic, "FIXD", 4); + + for (int i = 0; i < header->file_size; ++i) { + u32* d = (u32*)header + i; + if (*d == 0x2020E || *d == 0x2020D) + __debugbreak(); + } + if (relocate_segments) { + // Relocate segments + header->RelocateSegmentsTable(base, data_section0, data_section1); + } + + // Rebase export table + header->RelocateExportsTable(base); + + // Rebase unk2 + header->RelocateUnk2Patches(base); + + // Apply import patches + ApplyImportPatches(header, base); + + // Rebase import table 1 name & symbol offsets + header->RelocateImportTable1(base); + + // Rebase import tables 2 & 3 symbol offsets + header->RelocateImportTable2(base); + header->RelocateImportTable3(base); + + // Apply unk3 patches + ApplyUnk3Patches(header, base); + + // Apply relocation patches + ApplyRelocationPatches(header, base); + + // Apply import table 1 patches + ApplyExitPatches(header, base); + + // Import Table 1 + ApplyImportTable1Patches(header, base, false); + + // Apply unk2 patches + ApplyUnk2Patches(header, base, false); + + // Load exports + LoadExportsTable(header, base); + + // Retroactively apply import table 1 patches to the previous CROs + // Retroactively apply unk2 patches to the previous CROs + for (u32 cro_base : loaded_cros) { + CROHeader* cro_header = reinterpret_cast(Memory::GetPointer(cro_base)); + ApplyImportTable1Patches(cro_header, cro_base, true); + ApplyUnk2Patches(header, cro_base, true); + } + + // Relocate all offsets + header->RelocateOffsets(base); + + loaded_cros.push_back(base); +} + /** * LDR_RO::Initialize service function * Inputs: @@ -26,9 +497,9 @@ namespace LDR_RO { */ static void Initialize(Service::Interface* self) { u32* cmd_buff = Kernel::GetCommandBuffer(); - u32 crs_buffer_ptr = cmd_buff[1]; + u8* crs_buffer_ptr = Memory::GetPointer(cmd_buff[1]); u32 crs_size = cmd_buff[2]; - u32 address = cmd_buff[3]; + u8* address = Memory::GetPointer(cmd_buff[3]); u32 value = cmd_buff[4]; u32 process = cmd_buff[5]; @@ -36,6 +507,13 @@ static void Initialize(Service::Interface* self) { LOG_ERROR(Service_LDR, "This value should be zero, but is actually %u!", value); } + loaded_exports.clear(); + loaded_cros.clear(); + + memcpy(address, crs_buffer_ptr, crs_size); + + LoadCRO(cmd_buff[3], address, false, 0, 0); + // TODO(purpasmart96): Verify return header on HW cmd_buff[1] = RESULT_SUCCESS.raw; // No error @@ -74,11 +552,26 @@ static void LoadCRR(Service::Interface* self) { crs_buffer_ptr, crs_size, value, process); } +static void LoadExeCRO(Service::Interface* self) { + u32* cmd_buff = Kernel::GetCommandBuffer(); + u32 base = cmd_buff[2]; + u8* dst = Memory::GetPointer(base); + u32 size = cmd_buff[3]; + + memcpy(dst, Memory::GetPointer(cmd_buff[1]), size); + + LoadCRO(base, dst, true, cmd_buff[4], cmd_buff[7]); + + cmd_buff[1] = 0; + cmd_buff[2] = 0; + LOG_WARNING(Service_APT, "Loading CRO"); +} + const Interface::FunctionInfo FunctionTable[] = { {0x000100C2, Initialize, "Initialize"}, {0x00020082, LoadCRR, "LoadCRR"}, {0x00030042, nullptr, "UnloadCCR"}, - {0x000402C2, nullptr, "LoadExeCRO"}, + {0x000402C2, LoadExeCRO, "LoadExeCRO"}, {0x000500C2, nullptr, "LoadCROSymbols"}, {0x00060042, nullptr, "CRO_Load?"}, {0x00070042, nullptr, "LoadCROSymbols"},