shithub: rgbds

ref: 3cb56c5a2e6265a1da4e4ac542c48cfacb0226b5
dir: /src/link/main.c/

/*
 * This file is part of RGBDS.
 *
 * Copyright (c) 1997-2018, Carsten Sorensen and RGBDS contributors.
 *
 * SPDX-License-Identifier: MIT
 */

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "extern/err.h"

#include "link/object.h"
#include "link/output.h"
#include "link/assign.h"
#include "link/patch.h"
#include "link/mylink.h"
#include "link/mapfile.h"
#include "link/main.h"
#include "link/library.h"

#include "version.h"

enum eBlockType {
	BLOCK_COMMENT,
	BLOCK_OBJECTS,
	BLOCK_LIBRARIES,
	BLOCK_OUTPUT
};

int32_t options;
int32_t fillchar;
char *smartlinkstartsymbol;

/*
 * Print the usagescreen
 */

static void print_usage(void)
{
	printf(
"usage: rgblink [-dtVw] [-l linkerscript] [-m mapfile] [-n symfile] [-O overlay]\n"
"               [-o outfile] [-p pad_value] [-s symbol] file [...]\n");
	exit(1);
}

/*
 * The main routine
 */

int main(int argc, char *argv[])
{
	int ch;
	char *ep;

	if (argc == 1)
		print_usage();

	while ((ch = getopt(argc, argv, "dl:m:n:O:o:p:s:tVw")) != -1) {
		switch (ch) {
		case 'l':
			SetLinkerscriptName(optarg);
			break;
		case 'm':
			SetMapfileName(optarg);
			break;
		case 'n':
			SetSymfileName(optarg);
			break;
		case 'o':
			out_Setname(optarg);
			break;
		case 'O':
			out_SetOverlayname(optarg);
			options |= OPT_OVERLAY;
			break;
		case 'p':
			fillchar = strtoul(optarg, &ep, 0);
			if (optarg[0] == '\0' || *ep != '\0')
				errx(1, "Invalid argument for option 'p'");
			if (fillchar < 0 || fillchar > 0xFF)
				errx(1, "Argument for option 'p' must be between 0 and 0xFF");
			break;
		case 's':
			options |= OPT_SMART_C_LINK;
			smartlinkstartsymbol = optarg;
			break;
		case 't':
			options |= OPT_TINY;
			break;
		case 'd':
			/*
			 * Set to set WRAM as a single continuous block as on
			 * DMG. All WRAM sections must be WRAM0 as bankable WRAM
			 * sections do not exist in this mode. A WRAMX section
			 * will raise an error. VRAM bank 1 can't be used if
			 * this option is enabled either.
			 *
			 * This option implies OPT_CONTWRAM.
			 */
			options |= OPT_DMG_MODE;
			/* FALLTHROUGH */
		case 'w':
			/*
			 * Set to set WRAM as a single continuous block as on
			 * DMG. All WRAM sections must be WRAM0 as bankable WRAM
			 * sections do not exist in this mode. A WRAMX section
			 * will raise an error.
			 */
			options |= OPT_CONTWRAM;
			break;
		case 'V':
			printf("rgblink %s\n", get_package_version_string());
			exit(0);
		default:
			print_usage();
			/* NOTREACHED */
		}
	}
	argc -= optind;
	argv += optind;

	if (argc == 0)
		print_usage();

	for (int32_t i = 0; i < argc; ++i)
		obj_Readfile(argv[i]);

	AddNeededModules();
	AssignSections();
	CreateSymbolTable();
	Patch();
	Output();
	CloseMapfile();

	return 0;
}