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APT: Implement relocating the shared font to its true address.

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Subv 2016-04-17 21:12:37 -05:00
parent f72bd57212
commit 9005cda664
1 changed files with 74 additions and 9 deletions
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83
src/core/hle/service/apt/apt.cpp
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@ -22,16 +22,73 @@
namespace Service {
namespace APT {
// Address used for shared font (as observed on HW)
// TODO(bunnei): This is the hard-coded address where we currently dump the shared font from via
// https://github.com/citra-emu/3dsutils. This is technically a hack, and will not work at any
// address other than 0x18000000 due to internal pointers in the shared font dump that would need to
// be relocated. This might be fixed by dumping the shared font @ address 0x00000000 and then
// correctly mapping it in Citra, however we still do not understand how the mapping is determined.
static const VAddr SHARED_FONT_VADDR = 0x18000000;
/// BCFNT Shared Font file structures
namespace BCFNT {
struct CFNT {
u8 magic[4];
u16_le endianness;
u16_le header_size;
u32_le version;
u32_le file_size;
u32_le num_blocks;
};
struct FINF {
u8 magic[4];
u32_le section_size;
u8 font_type;
u8 line_feed;
u16_le alter_char_index;
u8 default_width[3];
u8 encoding;
u32_le tglp_offset;
u32_le cwdh_offset;
u32_le cmap_offset;
u8 height;
u8 width;
u8 ascent;
u8 reserved;
};
struct TGLP {
u8 magic[4];
u32_le section_size;
u8 cell_width;
u8 cell_height;
u8 baseline_position;
u8 max_character_width;
u32_le sheet_size;
u16_le num_sheets;
u16_le sheet_image_format;
u16_le num_columns;
u16_le num_rows;
u16_le sheet_width;
u16_le sheet_height;
u32_le sheet_data_offset;
};
struct CMAP {
u8 magic[4];
u32_le section_size;
u16_le code_begin;
u16_le code_end;
u16_le mapping_method;
u16_le reserved;
u32_le next_cmap_offset;
};
struct CWDH {
u8 magic[4];
u32_le section_size;
u16_le start_index;
u16_le end_index;
u32_le next_cwdh_offset;
};
}
/// Handle to shared memory region designated to for shared system font
static Kernel::SharedPtr<Kernel::SharedMemory> shared_font_mem;
static bool shared_font_relocated = false;
static Kernel::SharedPtr<Kernel::Mutex> lock;
static Kernel::SharedPtr<Kernel::Event> notification_event; ///< APT notification event
@ -72,12 +129,19 @@ void Initialize(Service::Interface* self) {
void GetSharedFont(Service::Interface* self) {
u32* cmd_buff = Kernel::GetCommandBuffer();
// The shared font has to be relocated to the new address before being passed to the application.
VAddr target_address = Memory::PhysicalToVirtualAddress(shared_font_mem->linear_heap_phys_address);
// The shared font dumped by 3dsutils (https://github.com/citra-emu/3dsutils) uses this address as base,
// so we relocate it from there to our real address.
static const VAddr SHARED_FONT_VADDR = 0x18000000;
if (!shared_font_relocated)
RelocateSharedFont(SHARED_FONT_VADDR, target_address);
cmd_buff[0] = IPC::MakeHeader(0x44, 2, 2);
cmd_buff[1] = RESULT_SUCCESS.raw; // No error
// Since the SharedMemory interface doesn't provide the address at which the memory was allocated,
// the APT service calculates this address by scanning the entire address space (using svcQueryMemory)
// the real APT service calculates this address by scanning the entire address space (using svcQueryMemory)
// and searches for an allocation of the same size as the Shared Font.
cmd_buff[2] = Memory::PhysicalToVirtualAddress(shared_font_mem->linear_heap_phys_address);
cmd_buff[2] = target_address;
cmd_buff[3] = IPC::MoveHandleDesc();
cmd_buff[4] = Kernel::g_handle_table.Create(shared_font_mem).MoveFrom();
}
@ -447,6 +511,7 @@ void Init() {
void Shutdown() {
shared_font_mem = nullptr;
shared_font_relocated = false;
lock = nullptr;
notification_event = nullptr;
parameter_event = nullptr;