ref: 928b347dfcaf860f0a4e3519fb87e87db094001d
dir: /src/link/script.c/
/* * Copyright (C) 2017 Antonio Nino Diaz <[email protected]> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <string.h> #include "extern/err.h" #include "link/assign.h" #include "link/mylink.h" static struct { unsigned int address; /* current address to write sections to */ unsigned int top_address; /* not inclusive */ enum eSectionType type; } bank[MAXBANKS]; static int current_bank = -1; /* Bank as seen by the bank array */ static int current_real_bank = -1; /* bank as seen by the GB */ void script_InitSections(void) { int i; for (i = 0; i < MAXBANKS; i++) { if (i == BANK_ROM0) { /* ROM0 bank */ bank[i].address = 0x0000; if (options & OPT_TINY) { bank[i].top_address = 0x8000; } else { bank[i].top_address = 0x4000; } bank[i].type = SECT_ROM0; } else if (i >= BANK_ROMX && i < BANK_ROMX + BANK_COUNT_ROMX) { /* Swappable ROM bank */ bank[i].address = 0x4000; bank[i].top_address = 0x8000; bank[i].type = SECT_ROMX; } else if (i == BANK_WRAM0) { /* WRAM */ bank[i].address = 0xC000; if (options & OPT_CONTWRAM) { bank[i].top_address = 0xE000; } else { bank[i].top_address = 0xD000; } bank[i].type = SECT_WRAM0; } else if (i >= BANK_SRAM && i < BANK_SRAM + BANK_COUNT_SRAM) { /* Swappable SRAM bank */ bank[i].address = 0xA000; bank[i].top_address = 0xC000; bank[i].type = SECT_SRAM; } else if (i >= BANK_WRAMX && i < BANK_WRAMX + BANK_COUNT_WRAMX) { /* Swappable WRAM bank */ bank[i].address = 0xD000; bank[i].top_address = 0xE000; bank[i].type = SECT_WRAMX; } else if (i >= BANK_VRAM && i < BANK_VRAM + BANK_COUNT_VRAM) { /* Swappable VRAM bank */ bank[i].address = 0x8000; bank[i].top_address = 0xA000; bank[i].type = SECT_VRAM; } else if (i == BANK_OAM) { /* OAM */ bank[i].address = 0xFE00; bank[i].top_address = 0xFEA0; bank[i].type = SECT_OAM; } else if (i == BANK_HRAM) { /* HRAM */ bank[i].address = 0xFF80; bank[i].top_address = 0xFFFF; bank[i].type = SECT_HRAM; } else { errx(1, "(INTERNAL) Unknown bank type!"); } } } void script_SetCurrentSectionType(const char *type, unsigned int bank) { if (strcmp(type, "ROM0") == 0) { if (bank != 0) errx(1, "(Internal) Trying to assign a bank number to ROM0.\n"); current_bank = BANK_ROM0; current_real_bank = 0; return; } else if (strcmp(type, "ROMX") == 0) { if (bank == 0) errx(1, "ROMX index can't be 0.\n"); if (bank > BANK_COUNT_ROMX) errx(1, "ROMX index too big (%d > %d).\n", bank, BANK_COUNT_ROMX); current_bank = BANK_ROMX + bank - 1; current_real_bank = bank; return; } else if (strcmp(type, "VRAM") == 0) { if (bank >= BANK_COUNT_VRAM) errx(1, "VRAM index too big (%d >= %d).\n", bank, BANK_COUNT_VRAM); current_bank = BANK_VRAM + bank; current_real_bank = bank; return; } else if (strcmp(type, "WRAM0") == 0) { if (bank != 0) errx(1, "(Internal) Trying to assign a bank number to WRAM0.\n"); current_bank = BANK_WRAM0; current_real_bank = 0; return; } else if (strcmp(type, "WRAMX") == 0) { if (bank == 0) errx(1, "WRAMX index can't be 0.\n"); if (bank > BANK_COUNT_WRAMX) errx(1, "WRAMX index too big (%d > %d).\n", bank, BANK_COUNT_WRAMX); current_bank = BANK_WRAMX + bank - 1; current_real_bank = bank - 1; return; } else if (strcmp(type, "SRAM") == 0) { if (bank >= BANK_COUNT_SRAM) errx(1, "SRAM index too big (%d >= %d).\n", bank, BANK_COUNT_SRAM); current_bank = BANK_SRAM + bank; current_real_bank = bank; return; } else if (strcmp(type, "OAM") == 0) { if (bank != 0) errx(1, "(Internal) Trying to assign a bank number to OAM.\n"); current_bank = BANK_OAM; current_real_bank = 0; return; } else if (strcmp(type, "HRAM") == 0) { if (bank != 0) errx(1, "(Internal) Trying to assign a bank number to HRAM.\n"); current_bank = BANK_HRAM; current_real_bank = 0; return; } errx(1, "(Internal) Unknown section type \"%s\".\n", type); } void script_SetAddress(unsigned int addr) { if (current_bank == -1) { errx(1, "Trying to set an address without assigned bank\n"); } /* Make sure that we don't go back. */ if (bank[current_bank].address > addr) { errx(1, "Trying to go to a previous address (0x%04X to 0x%04X)\n", bank[current_bank].address, addr); } bank[current_bank].address = addr; /* Make sure we don't overflow */ if (bank[current_bank].address >= bank[current_bank].top_address) { errx(1, "Bank overflowed (0x%04X >= 0x%04X)\n", bank[current_bank].address, bank[current_bank].top_address); } } void script_SetAlignment(unsigned int alignment) { if (current_bank == -1) { errx(1, "Trying to set an alignment without assigned bank\n"); } if (alignment > 15) { errx(1, "Trying to set an alignment too big: %d\n", alignment); } unsigned int size = 1 << alignment; unsigned int mask = size - 1; if (bank[current_bank].address & mask) { bank[current_bank].address &= ~mask; bank[current_bank].address += size; } /* Make sure we don't overflow */ if (bank[current_bank].address >= bank[current_bank].top_address) { errx(1, "Bank overflowed (0x%04X >= 0x%04X)\n", bank[current_bank].address, bank[current_bank].top_address); } } void script_OutputSection(const char *section_name) { if (current_bank == -1) { errx(1, "Trying to place section \"%s\" without assigned bank\n", section_name); } if (!IsSectionSameTypeBankAndFloating(section_name, bank[current_bank].type, current_real_bank)) { errx(1, "Different attributes for \"%s\" in source and linkerscript\n", section_name); } /* Move section to its place. */ bank[current_bank].address += AssignSectionAddressAndBankByName(section_name, bank[current_bank].address, current_real_bank); }