Mercurial > repos > blastem
changeset 2105:1bda10d60b29
Add some enhancements for disassembling Main CPU Sega CD code
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Sat, 12 Feb 2022 14:50:40 -0800 |
| parents | ff32a90260c9 |
| children | d2989e32c026 |
| files | dis.c |
| diffstat | 1 files changed, 215 insertions(+), 112 deletions(-) [+] |
line wrap: on
line diff
--- a/dis.c Fri Feb 11 23:21:10 2022 -0800 +++ b/dis.c Sat Feb 12 14:50:40 2022 -0800 @@ -159,7 +159,7 @@ tern_node * named_labels = NULL; uint32_t address_off = 0, address_end; - uint8_t do_cd_labels = 0; + uint8_t do_cd_labels = 0, main_cpu = 0; for(uint8_t opt = 2; opt < argc; ++opt) { if (argv[opt][0] == '-') { FILE * address_log; @@ -183,6 +183,9 @@ case 'c': do_cd_labels = 1; break; + case 'm': + main_cpu = 1; + break; case 's': opt++; if (opt >= argc) { @@ -234,6 +237,7 @@ char int_key[MAX_INT_KEY_SIZE]; uint8_t is_scd_iso = 0; + uint8_t has_manual_defs = !!def; if (vos) { vos_program_module header; @@ -288,51 +292,70 @@ boot_size = (end / 2352) * 2048; } if (is_scd_iso) { + fclose(f); for(cur = filebuf; cur - filebuf < (boot_size/2); ++cur) { *cur = (*cur >> 8) | (*cur << 8); } - uint32_t sub_start =filebuf[0x40/2] << 16 | filebuf[0x42/2]; - uint32_t sub_end =filebuf[0x44/2] << 16 | filebuf[0x46/2]; - if (sub_start > (boot_size - 0x20)) { - fprintf(stderr, "System Program start offset is %X, but image is only %X bytes\n", sub_start, (uint32_t)boot_size); - return 1; - } - if (sub_end > boot_size) { - sub_end = boot_size; - } - uint32_t offset_start = (filebuf[(sub_start + 0x18)/2] << 16 | filebuf[(sub_start + 0x1A)/2]) + sub_start; - uint8_t has_manual_defs = !!def; - for(uint32_t cur = offset_start, index = 0; cur < sub_end && filebuf[cur/2]; cur+=2, ++index) - { - uint32_t offset = offset_start + filebuf[cur/2]; - if (offset >= boot_size) { - break; + if (main_cpu) { + uint32_t main_start = 0x200; + uint32_t extra_start = filebuf[0x30/2] << 16 | filebuf[0x32/2]; + uint32_t main_end = (filebuf[0x34/2] << 16 | filebuf[0x36/2]) + extra_start; + if (main_end > boot_size) { + main_end = boot_size; + } + address_off = 0xFF0000; + address_end = address_off + main_end-main_start; + filebuf += main_start / 2; + named_labels = add_label(named_labels, "start", 0xFF0000); + if (!has_manual_defs || !only) { + def = defer(0xFF0000, def); + } + //TODO: other regions + named_labels = add_label(named_labels, "user_start", 0xFF0584); + do_cd_labels = 1; + } else { + uint32_t sub_start =filebuf[0x40/2] << 16 | filebuf[0x42/2]; + uint32_t sub_end =filebuf[0x44/2] << 16 | filebuf[0x46/2]; + if (sub_start > (boot_size - 0x20)) { + fprintf(stderr, "System Program start offset is %X, but image is only %X bytes\n", sub_start, (uint32_t)boot_size); + return 1; + } + if (sub_end > boot_size) { + sub_end = boot_size; } - static const char* fixed_names[3] = { - "init", - "main", - "int_2" - }; - char namebuf[32]; - const char *name; - if (index < 3) { - name = fixed_names[index]; - } else { - name = namebuf; - sprintf(namebuf, "usercall%u", index); + uint32_t offset_start = (filebuf[(sub_start + 0x18)/2] << 16 | filebuf[(sub_start + 0x1A)/2]) + sub_start; + for(uint32_t cur = offset_start, index = 0; cur < sub_end && filebuf[cur/2]; cur+=2, ++index) + { + uint32_t offset = offset_start + filebuf[cur/2]; + if (offset >= boot_size) { + break; + } + static const char* fixed_names[3] = { + "init", + "main", + "int_2" + }; + char namebuf[32]; + const char *name; + if (index < 3) { + name = fixed_names[index]; + } else { + name = namebuf; + sprintf(namebuf, "usercall%u", index); + } + uint32_t address = 0x6000 + offset - sub_start; + named_labels = add_label(named_labels, name, address); + if (!has_manual_defs || !only) { + def = defer(address, def); + } } - uint32_t address = 0x6000 + offset - sub_start; - named_labels = add_label(named_labels, name, address); - if (!has_manual_defs || !only) { - def = defer(address, def); - } + + do_cd_labels = 1; + filebuf += sub_start / 2; + address_off = 0x6000; + address_end = sub_end-sub_start + address_off; } - fclose(f); - do_cd_labels = 1; - filebuf += sub_start / 2; - address_off = 0x6000; - address_end = sub_end-sub_start + address_off; } } if (!vos && !is_scd_iso) { @@ -377,79 +400,159 @@ } } if (do_cd_labels) { - named_labels = weak_label(named_labels, "bios_common_work", 0x5E80); - named_labels = weak_label(named_labels, "_setjmptbl", 0x5F0A); - named_labels = weak_label(named_labels, "_waitvsync", 0x5F10); - named_labels = weak_label(named_labels, "_buram", 0x5F16); - named_labels = weak_label(named_labels, "_cdboot", 0x5F1C); - named_labels = weak_label(named_labels, "_cdbios", 0x5F22); - named_labels = weak_label(named_labels, "_usercall0", 0x5F28); - named_labels = weak_label(named_labels, "_usercall1", 0x5F2E); - named_labels = weak_label(named_labels, "_usercall2", 0x5F34); - named_labels = weak_label(named_labels, "_usercall2Address", 0x5F36); - named_labels = weak_label(named_labels, "_usercall3", 0x5F3A); - named_labels = weak_label(named_labels, "_adrerr", 0x5F40); - named_labels = weak_label(named_labels, "_adrerrAddress", 0x5F42); - named_labels = weak_label(named_labels, "_coderr", 0x5F46); - named_labels = weak_label(named_labels, "_coderrAddress", 0x5F48); - named_labels = weak_label(named_labels, "_diverr", 0x5F4C); - named_labels = weak_label(named_labels, "_diverrAddress", 0x5F4E); - named_labels = weak_label(named_labels, "_chkerr", 0x5F52); - named_labels = weak_label(named_labels, "_chkerrAddress", 0x5F54); - named_labels = weak_label(named_labels, "_trperr", 0x5F58); - named_labels = weak_label(named_labels, "_trperrAddress", 0x5F5A); - named_labels = weak_label(named_labels, "_spverr", 0x5F5E); - named_labels = weak_label(named_labels, "_spverrAddress", 0x5F60); - named_labels = weak_label(named_labels, "_trace", 0x5F64); - named_labels = weak_label(named_labels, "_traceAddress", 0x5F66); - named_labels = weak_label(named_labels, "_nocod0", 0x5F6A); - named_labels = weak_label(named_labels, "_nocod0Address", 0x5F6C); - named_labels = weak_label(named_labels, "_nocod0", 0x5F70); - named_labels = weak_label(named_labels, "_nocod0Address", 0x5F72); - named_labels = weak_label(named_labels, "_slevel1", 0x5F76); - named_labels = weak_label(named_labels, "_slevel1Address", 0x5F78); - named_labels = weak_label(named_labels, "_slevel2", 0x5F7C); - named_labels = weak_label(named_labels, "_slevel2Address", 0x5F7E); - named_labels = weak_label(named_labels, "_slevel3", 0x5F82); - named_labels = weak_label(named_labels, "_slevel3Address", 0x5F84); - named_labels = weak_label(named_labels, "WORD_RAM_2M", 0x80000); - named_labels = weak_label(named_labels, "WORD_RAM_1M", 0xC0000); - named_labels = weak_label(named_labels, "LED_CONTROL", 0xFFFF8000); - named_labels = weak_label(named_labels, "VERSION_RESET", 0xFFFF8001); - named_labels = weak_label(named_labels, "MEM_MODE_WORD", 0xFFFF8002); - named_labels = weak_label(named_labels, "MEM_MODE_BYTE", 0xFFFF8003); - named_labels = weak_label(named_labels, "CDC_CTRL", 0xFFFF8004); - named_labels = weak_label(named_labels, "CDC_AR", 0xFFFF8005); - named_labels = weak_label(named_labels, "CDC_REG_DATA_WORD", 0xFFFF8006); - named_labels = weak_label(named_labels, "CDC_REG_DATA", 0xFFFF8007); - named_labels = weak_label(named_labels, "CDC_HOST_DATA", 0xFFFF8008); - named_labels = weak_label(named_labels, "CDC_DMA_ADDR", 0xFFFF800A); - named_labels = weak_label(named_labels, "STOP_WATCH", 0xFFFF800C); - named_labels = weak_label(named_labels, "COMM_MAIN_FLAG", 0xFFFF800E); - named_labels = weak_label(named_labels, "COMM_SUB_FLAG", 0xFFFF800F); - named_labels = weak_label(named_labels, "COMM_CMD0", 0xFFFF8010); - named_labels = weak_label(named_labels, "COMM_CMD1", 0xFFFF8012); - named_labels = weak_label(named_labels, "COMM_CMD2", 0xFFFF8014); - named_labels = weak_label(named_labels, "COMM_CMD3", 0xFFFF8016); - named_labels = weak_label(named_labels, "COMM_CMD4", 0xFFFF8018); - named_labels = weak_label(named_labels, "COMM_CMD5", 0xFFFF801A); - named_labels = weak_label(named_labels, "COMM_CMD6", 0xFFFF801C); - named_labels = weak_label(named_labels, "COMM_CMD7", 0xFFFF801E); - named_labels = weak_label(named_labels, "COMM_STATUS0", 0xFFFF8020); - named_labels = weak_label(named_labels, "COMM_STATUS1", 0xFFFF8022); - named_labels = weak_label(named_labels, "COMM_STATUS2", 0xFFFF8024); - named_labels = weak_label(named_labels, "COMM_STATUS3", 0xFFFF8026); - named_labels = weak_label(named_labels, "COMM_STATUS4", 0xFFFF8028); - named_labels = weak_label(named_labels, "COMM_STATUS5", 0xFFFF802A); - named_labels = weak_label(named_labels, "COMM_STATUS6", 0xFFFF802C); - named_labels = weak_label(named_labels, "COMM_STATUS7", 0xFFFF802E); - named_labels = weak_label(named_labels, "TIMER_WORD", 0xFFFF8030); - named_labels = weak_label(named_labels, "TIMER", 0xFFFF8031); - named_labels = weak_label(named_labels, "INT_MASK_WORD", 0xFFFF8032); - named_labels = weak_label(named_labels, "INT_MASK", 0xFFFF8033); - named_labels = weak_label(named_labels, "CDD_FADER", 0xFFFF8034); - named_labels = weak_label(named_labels, "CDD_CTRL_WORD", 0xFFFF8036); - named_labels = weak_label(named_labels, "CDD_CTRL_BYTE", 0xFFFF8037); + if (main_cpu) { + named_labels = weak_label(named_labels, "_bios_reset", 0x280); + named_labels = weak_label(named_labels, "_bios_entry", 0x284); + named_labels = weak_label(named_labels, "_bios_init", 0x288); + named_labels = weak_label(named_labels, "_bios_init_sp", 0x28C); + named_labels = weak_label(named_labels, "_bios_vint", 0x290); + named_labels = weak_label(named_labels, "_bios_set_hint", 0x294); + named_labels = weak_label(named_labels, "_bios_poll_io", 0x298); + named_labels = weak_label(named_labels, "_bios_detect_io", 0x29C); + named_labels = weak_label(named_labels, "_bios_clear_vram", 0x2A0); + named_labels = weak_label(named_labels, "_bios_clear_nmtbl", 0x2A4); + named_labels = weak_label(named_labels, "_bios_clear_vsram", 0x2A8); + named_labels = weak_label(named_labels, "_bios_init_vdp", 0x2AC); + named_labels = weak_label(named_labels, "_bios_vdp_loadregs", 0x2B0); + named_labels = weak_label(named_labels, "_bios_vdp_fill", 0x2B4); + named_labels = weak_label(named_labels, "_bios_clear_vram_range", 0x2B8); + named_labels = weak_label(named_labels, "_bios_clear_vram_range_dma", 0x2BC); + named_labels = weak_label(named_labels, "_bios_vram_dma_fill", 0x2C0); + named_labels = weak_label(named_labels, "_bios_update_nmtbl", 0x2C4); + named_labels = weak_label(named_labels, "_bios_update_nmtbl_template", 0x2C8); + named_labels = weak_label(named_labels, "_bios_fill_nmtbl", 0x2CC); + named_labels = weak_label(named_labels, "_bios_vdp_dma", 0x2D0); + named_labels = weak_label(named_labels, "_bios_vdp_dma_wordram", 0x2D4); + named_labels = weak_label(named_labels, "_bios_vdp_display_enable", 0x2D8); + named_labels = weak_label(named_labels, "_bios_vdp_display_disable", 0x2DC); + named_labels = weak_label(named_labels, "_bios_pal_buffer", 0x2E0); + named_labels = weak_label(named_labels, "_bios_pal_buffer_update", 0x2E4); + named_labels = weak_label(named_labels, "_bios_pal_dma", 0x2E8); + named_labels = weak_label(named_labels, "_bios_gfx_decomp", 0x2EC); + named_labels = weak_label(named_labels, "_bios_gfx_decomp_ram", 0x2F0); + named_labels = weak_label(named_labels, "_bios_update_sprites", 0x2F4); + named_labels = weak_label(named_labels, "_bios_clear_ram", 0x2F8); + named_labels = weak_label(named_labels, "_bios_display_sprite", 0x300); + named_labels = weak_label(named_labels, "_bios_wait_vint", 0x304); + named_labels = weak_label(named_labels, "_bios_wait_vint_flags", 0x308); + named_labels = weak_label(named_labels, "_bios_dma_sat", 0x30C); + named_labels = weak_label(named_labels, "_bios_set_hint_direct", 0x314); + named_labels = weak_label(named_labels, "_bios_disable_hint", 0x318); + named_labels = weak_label(named_labels, "_bios_print", 0x31C); + named_labels = weak_label(named_labels, "_bios_load_user_font", 0x320); + named_labels = weak_label(named_labels, "_bios_load_bios_font", 0x324); + named_labels = weak_label(named_labels, "_bios_load_bios_font_default", 0x328); + //TODO: more functions in the middle here + named_labels = weak_label(named_labels, "_bios_prng_mod", 0x338); + named_labels = weak_label(named_labels, "_bios_prng", 0x33C); + named_labels = weak_label(named_labels, "_bios_clear_comm", 0x340); + named_labels = weak_label(named_labels, "_bios_comm_update", 0x344); + //TODO: more functions in the middle here + named_labels = weak_label(named_labels, "_bios_sega_logo", 0x364); + named_labels = weak_label(named_labels, "_bios_set_vint", 0x368); + //TODO: more functions at the end here + + named_labels = weak_label(named_labels, "CD_RESET_IFL2", 0xA12000); + named_labels = weak_label(named_labels, "CD_RESET_IFL2_BYTE", 0xA12001); + named_labels = weak_label(named_labels, "CD_WRITE_PROTECT", 0xA12002); + named_labels = weak_label(named_labels, "CD_MEM_MODE", 0xA12003); + named_labels = weak_label(named_labels, "CDC_CTRL", 0xA12004); + named_labels = weak_label(named_labels, "HINT_VECTOR", 0xA12006); + named_labels = weak_label(named_labels, "CDC_HOST_DATA", 0xA12008); + named_labels = weak_label(named_labels, "STOP_WATCH", 0xA1200C); + named_labels = weak_label(named_labels, "COMM_MAIN_FLAG", 0xA1200E); + named_labels = weak_label(named_labels, "COMM_SUB_FLAG", 0xA1200F); + named_labels = weak_label(named_labels, "COMM_CMD0", 0xA12010); + named_labels = weak_label(named_labels, "COMM_CMD1", 0xA12012); + named_labels = weak_label(named_labels, "COMM_CMD2", 0xA12014); + named_labels = weak_label(named_labels, "COMM_CMD3", 0xA12016); + named_labels = weak_label(named_labels, "COMM_CMD4", 0xA12018); + named_labels = weak_label(named_labels, "COMM_CMD5", 0xA1201A); + named_labels = weak_label(named_labels, "COMM_CMD6", 0xA1201C); + named_labels = weak_label(named_labels, "COMM_CMD7", 0xA1201E); + named_labels = weak_label(named_labels, "COMM_STATUS0", 0xA12020); + named_labels = weak_label(named_labels, "COMM_STATUS1", 0xA12022); + named_labels = weak_label(named_labels, "COMM_STATUS2", 0xA12024); + named_labels = weak_label(named_labels, "COMM_STATUS3", 0xA12026); + named_labels = weak_label(named_labels, "COMM_STATUS4", 0xA12028); + named_labels = weak_label(named_labels, "COMM_STATUS5", 0xA1202A); + named_labels = weak_label(named_labels, "COMM_STATUS6", 0xA1202C); + named_labels = weak_label(named_labels, "COMM_STATUS7", 0xA1202E); + } else { + named_labels = weak_label(named_labels, "bios_common_work", 0x5E80); + named_labels = weak_label(named_labels, "_setjmptbl", 0x5F0A); + named_labels = weak_label(named_labels, "_waitvsync", 0x5F10); + named_labels = weak_label(named_labels, "_buram", 0x5F16); + named_labels = weak_label(named_labels, "_cdboot", 0x5F1C); + named_labels = weak_label(named_labels, "_cdbios", 0x5F22); + named_labels = weak_label(named_labels, "_usercall0", 0x5F28); + named_labels = weak_label(named_labels, "_usercall1", 0x5F2E); + named_labels = weak_label(named_labels, "_usercall2", 0x5F34); + named_labels = weak_label(named_labels, "_usercall2Address", 0x5F36); + named_labels = weak_label(named_labels, "_usercall3", 0x5F3A); + named_labels = weak_label(named_labels, "_adrerr", 0x5F40); + named_labels = weak_label(named_labels, "_adrerrAddress", 0x5F42); + named_labels = weak_label(named_labels, "_coderr", 0x5F46); + named_labels = weak_label(named_labels, "_coderrAddress", 0x5F48); + named_labels = weak_label(named_labels, "_diverr", 0x5F4C); + named_labels = weak_label(named_labels, "_diverrAddress", 0x5F4E); + named_labels = weak_label(named_labels, "_chkerr", 0x5F52); + named_labels = weak_label(named_labels, "_chkerrAddress", 0x5F54); + named_labels = weak_label(named_labels, "_trperr", 0x5F58); + named_labels = weak_label(named_labels, "_trperrAddress", 0x5F5A); + named_labels = weak_label(named_labels, "_spverr", 0x5F5E); + named_labels = weak_label(named_labels, "_spverrAddress", 0x5F60); + named_labels = weak_label(named_labels, "_trace", 0x5F64); + named_labels = weak_label(named_labels, "_traceAddress", 0x5F66); + named_labels = weak_label(named_labels, "_nocod0", 0x5F6A); + named_labels = weak_label(named_labels, "_nocod0Address", 0x5F6C); + named_labels = weak_label(named_labels, "_nocod0", 0x5F70); + named_labels = weak_label(named_labels, "_nocod0Address", 0x5F72); + named_labels = weak_label(named_labels, "_slevel1", 0x5F76); + named_labels = weak_label(named_labels, "_slevel1Address", 0x5F78); + named_labels = weak_label(named_labels, "_slevel2", 0x5F7C); + named_labels = weak_label(named_labels, "_slevel2Address", 0x5F7E); + named_labels = weak_label(named_labels, "_slevel3", 0x5F82); + named_labels = weak_label(named_labels, "_slevel3Address", 0x5F84); + named_labels = weak_label(named_labels, "WORD_RAM_2M", 0x80000); + named_labels = weak_label(named_labels, "WORD_RAM_1M", 0xC0000); + named_labels = weak_label(named_labels, "LED_CONTROL", 0xFFFF8000); + named_labels = weak_label(named_labels, "VERSION_RESET", 0xFFFF8001); + named_labels = weak_label(named_labels, "MEM_MODE_WORD", 0xFFFF8002); + named_labels = weak_label(named_labels, "MEM_MODE_BYTE", 0xFFFF8003); + named_labels = weak_label(named_labels, "CDC_CTRL", 0xFFFF8004); + named_labels = weak_label(named_labels, "CDC_AR", 0xFFFF8005); + named_labels = weak_label(named_labels, "CDC_REG_DATA_WORD", 0xFFFF8006); + named_labels = weak_label(named_labels, "CDC_REG_DATA", 0xFFFF8007); + named_labels = weak_label(named_labels, "CDC_HOST_DATA", 0xFFFF8008); + named_labels = weak_label(named_labels, "CDC_DMA_ADDR", 0xFFFF800A); + named_labels = weak_label(named_labels, "STOP_WATCH", 0xFFFF800C); + named_labels = weak_label(named_labels, "COMM_MAIN_FLAG", 0xFFFF800E); + named_labels = weak_label(named_labels, "COMM_SUB_FLAG", 0xFFFF800F); + named_labels = weak_label(named_labels, "COMM_CMD0", 0xFFFF8010); + named_labels = weak_label(named_labels, "COMM_CMD1", 0xFFFF8012); + named_labels = weak_label(named_labels, "COMM_CMD2", 0xFFFF8014); + named_labels = weak_label(named_labels, "COMM_CMD3", 0xFFFF8016); + named_labels = weak_label(named_labels, "COMM_CMD4", 0xFFFF8018); + named_labels = weak_label(named_labels, "COMM_CMD5", 0xFFFF801A); + named_labels = weak_label(named_labels, "COMM_CMD6", 0xFFFF801C); + named_labels = weak_label(named_labels, "COMM_CMD7", 0xFFFF801E); + named_labels = weak_label(named_labels, "COMM_STATUS0", 0xFFFF8020); + named_labels = weak_label(named_labels, "COMM_STATUS1", 0xFFFF8022); + named_labels = weak_label(named_labels, "COMM_STATUS2", 0xFFFF8024); + named_labels = weak_label(named_labels, "COMM_STATUS3", 0xFFFF8026); + named_labels = weak_label(named_labels, "COMM_STATUS4", 0xFFFF8028); + named_labels = weak_label(named_labels, "COMM_STATUS5", 0xFFFF802A); + named_labels = weak_label(named_labels, "COMM_STATUS6", 0xFFFF802C); + named_labels = weak_label(named_labels, "COMM_STATUS7", 0xFFFF802E); + named_labels = weak_label(named_labels, "TIMER_WORD", 0xFFFF8030); + named_labels = weak_label(named_labels, "TIMER", 0xFFFF8031); + named_labels = weak_label(named_labels, "INT_MASK_WORD", 0xFFFF8032); + named_labels = weak_label(named_labels, "INT_MASK", 0xFFFF8033); + named_labels = weak_label(named_labels, "CDD_FADER", 0xFFFF8034); + named_labels = weak_label(named_labels, "CDD_CTRL_WORD", 0xFFFF8036); + named_labels = weak_label(named_labels, "CDD_CTRL_BYTE", 0xFFFF8037); + } } uint16_t *encoded, *next; uint32_t size, tmp_addr;