diff options
Diffstat (limited to 'arm9/lib/src/FS_overlay.c')
| -rw-r--r-- | arm9/lib/src/FS_overlay.c | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/arm9/lib/src/FS_overlay.c b/arm9/lib/src/FS_overlay.c new file mode 100644 index 00000000..d2a4677d --- /dev/null +++ b/arm9/lib/src/FS_overlay.c @@ -0,0 +1,319 @@ +#include "nitro.h" +#include "DGT_common.h" +#include "DGT_dgt.h" +#include "OS_cache.h" +#include "OS_system.h" +#include "MI_memory.h" +#include "MI_uncompress.h" +#include "FS_rom.h" +#include "FS_overlay.h" +#include "FS_mw_dtor.h" +#include "MB_mb.h" + +#define FS_OVERLAY_FLAG_COMP 0x0001 +#define FS_OVERLAY_FLAG_AUTH 0x0002 +#define FS_OVERLAY_DIGEST_SIZE DGT_HASH2_DIGEST_SIZE + +u32 FSi_GetOverlayBinarySize(FSOverlayInfo * p_ovi) +{ + u32 size = (p_ovi->header.flag & FS_OVERLAY_FLAG_COMP) + ? p_ovi->header.compressed + : p_ovi->header.ram_size; + return size; +} + +void FS_ClearOverlayImage(FSOverlayInfo * p_ovi) +{ + u8 * const im_start = FS_GetOverlayAddress(p_ovi); + u32 const ram_size = FS_GetOverlayImageSize(p_ovi); + u32 const total_size = FS_GetOverlayTotalSize(p_ovi); + + IC_InvalidateRange(im_start, total_size); + DC_InvalidateRange(im_start, total_size); + MI_CpuFill8(im_start + ram_size, 0, total_size - ram_size); +} + +FSFileID FS_GetOverlayFileID(FSOverlayInfo * p_ovi) +{ + FSFileID ret; + ret.arc = &fsi_arc_rom; + ret.file_id = p_ovi->header.file_id; + return ret; +} + +BOOL FSi_LoadOverlayInfoCore(FSOverlayInfo * p_ovi, MIProcessor target, FSOverlayID id, FSArchive * arc, u32 offset_arm9, u32 len_arm9, u32 offset_arm7, u32 len_arm7) +{ + CARDRomRegion pr[1]; + u32 pos; + if (target == MI_PROCESSOR_ARM9) + { + pr->offset = offset_arm9; + pr->length = len_arm9; + } + else + { + pr->offset = offset_arm7; + pr->length = len_arm7; + } + pos = (u32) id * sizeof(FSOverlayInfoHeader); + if (pos >= pr->length) + return FALSE; + + FSFile file[1]; + FS_InitFile(file); + // BOOL FS_OpenFileDirect(FSFile * p_file, FSArchive * p_arc, u32 image_top, u32 image_bottom, u32 file_index) + if (!FS_OpenFileDirect(file, arc, pr->offset + pos, pr->offset + pr->length, (u32)~0)) + return FALSE; + if (FS_ReadFile(file, p_ovi, sizeof(FSOverlayInfoHeader)) != sizeof(FSOverlayInfoHeader)) + { + FS_CloseFile(file); + return FALSE; + } + FS_CloseFile(file); + p_ovi->target = target; + if (!FS_OpenFileFast(file, FS_GetOverlayFileID(p_ovi))) + return FALSE; + p_ovi->file_pos.offset = FS_GetFileImageTop(file); + p_ovi->file_pos.length = FS_GetLength(file); + FS_CloseFile(file); + return TRUE; +} + +BOOL FS_LoadOverlayInfo(FSOverlayInfo * p_ovi, MIProcessor target, FSOverlayID id) +{ + CARDRomRegion * const pr = (target == MI_PROCESSOR_ARM9) ? &fsi_ovt9 : &fsi_ovt7; + if (pr->offset) + { + FSFile file[1]; + const u32 pos = id * sizeof(FSOverlayInfoHeader); + if (pos >= pr->length) + return FALSE; + MI_CpuCopy8((const void *)(pr->offset + pos), p_ovi, sizeof(FSOverlayInfoHeader)); + p_ovi->target = target; + FS_InitFile(file); + if (!FS_OpenFileFast(file, FS_GetOverlayFileID(p_ovi))) + return FALSE; + p_ovi->file_pos.offset = FS_GetFileImageTop(file); + p_ovi->file_pos.length = FS_GetLength(file); + FS_CloseFile(file); + return TRUE; + } + else + { + const CARDRomRegion * const p_ovt9 = CARD_GetRomRegionOVT(MI_PROCESSOR_ARM9); + const CARDRomRegion * const p_ovt7 = CARD_GetRomRegionOVT(MI_PROCESSOR_ARM7); + return FSi_LoadOverlayInfoCore(p_ovi, target, id, &fsi_arc_rom, p_ovt9->offset, p_ovt9->length, p_ovt7->offset, p_ovt7->length); + } +} + +BOOL FS_LoadOverlayImageAsync(FSOverlayInfo * p_ovi, FSFile * p_file) +{ + FS_InitFile(p_file); + if (!FS_OpenFileFast(p_file, FS_GetOverlayFileID(p_ovi))) + return FALSE; + else + { + s32 size = FSi_GetOverlayBinarySize(p_ovi); + FS_ClearOverlayImage(p_ovi); + if (FS_ReadFileAsync(p_file, FS_GetOverlayAddress(p_ovi), size) != size) + { + FS_CloseFile(p_file); + return FALSE; + } + return TRUE; + } +} + +BOOL FS_LoadOverlayImage(FSOverlayInfo * p_ovi) +{ + FSFile file[1]; + FS_InitFile(file); + if (!FS_OpenFileFast(file, FS_GetOverlayFileID(p_ovi))) + return FALSE; + else + { + s32 size = FSi_GetOverlayBinarySize(p_ovi); + FS_ClearOverlayImage(p_ovi); + if (FS_ReadFile(file, FS_GetOverlayAddress(p_ovi), size) != size) + { + FS_CloseFile(file); + return FALSE; + } + FS_CloseFile(file); + return TRUE; + } +} + +static const u8 fsi_def_digest_key[64] = { + 0x21, 0x06, 0xc0, 0xde, + 0xba, 0x98, 0xce, 0x3f, + 0xa6, 0x92, 0xe3, 0x9d, + 0x46, 0xf2, 0xed, 0x01, + + 0x76, 0xe3, 0xcc, 0x08, + 0x56, 0x23, 0x63, 0xfa, + 0xca, 0xd4, 0xec, 0xdf, + 0x9a, 0x62, 0x78, 0x34, + + 0x8f, 0x6d, 0x63, 0x3c, + 0xfe, 0x22, 0xca, 0x92, + 0x20, 0x88, 0x97, 0x23, + 0xd2, 0xcf, 0xae, 0xc2, + + 0x32, 0x67, 0x8d, 0xfe, + 0xca, 0x83, 0x64, 0x98, + 0xac, 0xfd, 0x3e, 0x37, + 0x87, 0x46, 0x58, 0x24, +}; + +static const void *fsi_digest_key_ptr = fsi_def_digest_key; +static int fsi_digest_key_len = sizeof(fsi_def_digest_key); + +BOOL FSi_CompareDigest(const u8 *spec_digest, void *src, int len) +{ + int i; + u8 digest[FS_OVERLAY_DIGEST_SIZE]; + u8 digest_key[64]; + + MI_CpuClear8(digest, sizeof(digest)); + MI_CpuCopy8(fsi_digest_key_ptr, digest_key, fsi_digest_key_len); + DGT_Hash2CalcHmac(digest, src, len, digest_key, fsi_digest_key_len); + for (i = 0; i < sizeof(digest); i += sizeof(u32)) + { + if (*(const u32 *)(digest + i) != *(const u32 *)(spec_digest + i)) + break; + } + return i == sizeof(digest); +} + +extern u8 SDK_OVERLAY_DIGEST[]; +extern u8 SDK_OVERLAY_DIGEST_END[]; + +void FS_StartOverlay(FSOverlayInfo * p_ovi) +{ + u32 rare_size = FSi_GetOverlayBinarySize(p_ovi); + if (MB_IsMultiBootChild()) + { + BOOL ret = FALSE; + + if (p_ovi->header.flag & FS_OVERLAY_FLAG_AUTH) + { + const u32 odt_max = (u32)((SDK_OVERLAY_DIGEST_END - SDK_OVERLAY_DIGEST) / FS_OVERLAY_DIGEST_SIZE); + if (p_ovi->header.id < odt_max) + { + const u8 * spec_digest = SDK_OVERLAY_DIGEST + FS_OVERLAY_DIGEST_SIZE * p_ovi->header.id; + ret = FSi_CompareDigest(spec_digest, p_ovi->header.ram_address, (int)rare_size); + } + } + if (!ret) + { + MI_CpuClear8(p_ovi->header.ram_address, rare_size); + OS_TPanic("FS_StartOverlay() failed! (invalid overlay-segment data)"); + return; + } + } + if (p_ovi->header.flag & FS_OVERLAY_FLAG_COMP) + { + MIi_UncompressBackward(p_ovi->header.ram_address + rare_size); + } + DC_FlushRange(p_ovi->header.ram_address, p_ovi->header.ram_size); + + { + FSOverlayInitFunc *p = p_ovi->header.sinit_init; + FSOverlayInitFunc *q = p_ovi->header.sinit_init_end; + for (; p < q; ++p) + { + if (*p) + (**p)(); + } + } +} + +void FS_EndOverlay(FSOverlayInfo *p_ovi) +{ + for (;;) + { + MWiDestructorChain *head = NULL, *tail = NULL; + const u32 region_top = (u32)FS_GetOverlayAddress(p_ovi); + const u32 region_bottom = region_top + FS_GetOverlayTotalSize(p_ovi); + + { + OSIntrMode bak_psr = OS_DisableInterrupts(); + MWiDestructorChain *prev = NULL; + MWiDestructorChain *base = __global_destructor_chain; + MWiDestructorChain *p = base; + while (p) + { + MWiDestructorChain *next = p->next; + const u32 dtor = (u32)p->dtor; + const u32 obj = (u32)p->obj; + if (((obj == 0) && (dtor >= region_top) && (dtor < region_bottom)) || + ((obj >= region_top) && (obj < region_bottom))) + { + /* If appropriate, extract*/ + if (!tail) + { + head = p; + } + else + { + tail->next = p; + } + if (base == p) + { + base = __global_destructor_chain = next; + } + tail = p, p->next = NULL; + if (prev) + { + prev->next = next; + } + } + else + { + prev = p; + } + p = next; + } + OS_RestoreInterrupts(bak_psr); + } + + if (!head) + { + break; + } + do + { + MWiDestructorChain *next = head->next; + if (head->dtor) + { + (*head->dtor) (head->obj); + } + head = next; + } + while (head); + } +} + +BOOL FS_UnloadOverlayImage(FSOverlayInfo * p_ovi) +{ + FS_EndOverlay(p_ovi); + return TRUE; +} + +BOOL FS_LoadOverlay(MIProcessor target, FSOverlayID id) +{ + FSOverlayInfo ovi; + if (!FS_LoadOverlayInfo(&ovi, target, id) || !FS_LoadOverlayImage(&ovi)) + return FALSE; + FS_StartOverlay(&ovi); + return TRUE; +} + +BOOL FS_UnloadOverlay(MIProcessor target, FSOverlayID id) +{ + FSOverlayInfo ovi; + if (!FS_LoadOverlayInfo(&ovi, target, id) || !FS_UnloadOverlayImage(&ovi)) + return FALSE; + return TRUE; +} |