ref: 6963d77f8af0509f18ad43cc03100bedd3b29e34
dir: /src/link/main.c/
/* * This file is part of RGBDS. * * Copyright (c) 1997-2019, Carsten Sorensen and RGBDS contributors. * * SPDX-License-Identifier: MIT */ #include <sys/types.h> #include <sys/stat.h> #include <stdio.h> #include <stdbool.h> #include <stdint.h> #include <stdlib.h> #include "link/object.h" #include "link/symbol.h" #include "link/section.h" #include "link/assign.h" #include "link/patch.h" #include "link/output.h" #include "extern/err.h" #include "extern/getopt.h" #include "version.h" bool isDmgMode; /* -d */ char const *linkerScriptName; /* -l */ char const *mapFileName; /* -m */ char const *symFileName; /* -n */ char const *overlayFileName; /* -O */ char const *outputFileName; /* -o */ uint8_t padValue; /* -p */ bool is32kMode; /* -t */ bool beVerbose; /* -v */ bool isWRA0Mode; /* -w */ FILE *openFile(char const *fileName, char const *mode) { if (!fileName) return NULL; FILE *file = fopen(fileName, mode); if (!file) err(1, "Could not open file \"%s\"", fileName); return file; } /* Short options */ static char const *optstring = "dl:m:n:O:o:p:s:tVvw"; /* * Equivalent long options * Please keep in the same order as short opts * * Also, make sure long opts don't create ambiguity: * A long opt's name should start with the same letter as its short opt, * except if it doesn't create any ambiguity (`verbose` versus `version`). * This is because long opt matching, even to a single char, is prioritized * over short opt matching */ static struct option const longopts[] = { { "dmg", no_argument, NULL, 'd' }, { "linkerscript", required_argument, NULL, 'l' }, { "map", required_argument, NULL, 'm' }, { "sym", required_argument, NULL, 'n' }, { "overlay", required_argument, NULL, 'O' }, { "output", required_argument, NULL, 'o' }, { "pad", required_argument, NULL, 'p' }, { "smart", required_argument, NULL, 's' }, { "tiny", no_argument, NULL, 't' }, { "version", no_argument, NULL, 'V' }, { "verbose", no_argument, NULL, 'v' }, { "wramx", no_argument, NULL, 'w' }, { NULL, no_argument, NULL, 0 } }; /** * Prints the program's usage to stdout. */ static void printUsage(void) { fputs( "Usage: rgblink [-dtVvw] [-l script] [-m map_file] [-n sym_file]\n" " [-O overlay_file] [-o out_file] [-p pad_value] [-s symbol]\n" " <file> ...\n" "Useful options:\n" " -l, --linkerscript <path> set the input linker script\n" " -m, --map <path> set the output map file\n" " -n, --sym <path> set the output symbol list file\n" " -o, --output <path> set the output file\n" " -p, --pad <value> set the value to pad between sections with\n" " -V, --version print RGBLINK version and exits\n" "\n" "For help, use `man rgblink' or go to https://rednex.github.io/rgbds/\n", stderr); } /** * Cleans up what has been done * Mostly here to please tools such as `valgrind` so actual errors can be seen */ static void cleanup(void) { obj_Cleanup(); } int main(int argc, char *argv[]) { int optionChar; char *endptr; /* For error checking with `strtol` */ unsigned long value; /* For storing `strtoul`'s return value */ /* Parse options */ while ((optionChar = musl_getopt_long_only(argc, argv, optstring, longopts, NULL)) != -1) { switch (optionChar) { case 'd': isDmgMode = true; isWRA0Mode = true; break; case 'l': linkerScriptName = optarg; break; case 'm': mapFileName = optarg; break; case 'n': symFileName = optarg; break; case 'O': overlayFileName = optarg; break; case 'o': outputFileName = optarg; break; case 'p': value = strtoul(optarg, &endptr, 0); if (optarg[0] == '\0' || *endptr != '\0') errx(1, "Invalid argument for option 'p'"); if (value > 0xFF) errx(1, "Argument for 'p' must be a byte (between 0 and 0xFF)"); padValue = value; break; case 's': /* FIXME: nobody knows what this does, figure it out */ (void)optarg; warnx("Nobody has any idea what `-s` does"); break; case 't': is32kMode = true; break; case 'V': printf("rgblink %s\n", get_package_version_string()); exit(0); case 'v': beVerbose = true; break; case 'w': isWRA0Mode = true; break; default: printUsage(); exit(1); } } int curArgIndex = optind; /* If no input files were specified, the user must have screwed up */ if (curArgIndex == argc) { fputs("FATAL: no input files\n", stderr); printUsage(); exit(1); } /* Patch the size array depending on command-line options */ if (!is32kMode) maxsize[SECTTYPE_ROM0] = 0x4000; if (!isWRA0Mode) maxsize[SECTTYPE_WRAM0] = 0x1000; /* Patch the bank ranges array depending on command-line options */ if (isDmgMode) bankranges[SECTTYPE_VRAM][1] = BANK_MIN_VRAM; /* Read all object files first, */ while (curArgIndex < argc) obj_ReadFile(argv[curArgIndex++]); /* then process them, */ obj_DoSanityChecks(); assign_AssignSections(); assign_Cleanup(); /* and finally output the result. */ patch_ApplyPatches(); out_WriteFiles(); /* Do cleanup before quitting, though. */ cleanup(); }