1 // SPDX-License-Identifier: GPL-2.0
9  * This file builds a disk-image from three different files:
11  * - setup: 8086 machine code, sets up system parm
12  * - system: 80386 code for actual system
13  * - zoffset.h: header with ZO_* defines
71 /*----------------------------------------------------------------------*/
135 	while (len--)  in partial_crc32()
140 static void die(const char * str, ...)  in die()  function
152 	die("Usage: build setup system zoffset.h image");  in usage()
189 		num_sections--;  in update_pecoff_section_header_fields()
201 	u32 reloc_offset = size - PECOFF_RELOC_RESERVE - PECOFF_COMPAT_RESERVE;  in update_pecoff_setup_and_reloc()
205 	u32 setup_size = reloc_offset - setup_offset;  in update_pecoff_setup_and_reloc()
221 	 * Put the IA-32 machine type (0x14c) and the associated entry point  in update_pecoff_setup_and_reloc()
236 	unsigned int text_sz = file_sz - text_start;  in update_pecoff_text()
237 	unsigned int bss_sz = init_sz - file_sz;  in update_pecoff_text()
257 	put_unaligned_le32(file_sz - 512 + bss_sz, &buf[pe_header + 0x1c]);  in update_pecoff_text()
295 	addr = efi64_stub_entry - 0x200;  in efi_stub_entry_update()
300 		die("32-bit and 64-bit EFI entry points do not match\n");  in efi_stub_entry_update()
345 		die("Unable to open `%s': %m", fname);  in parse_zoffset()
346 	c = fread(buf, 1, sizeof(buf) - 1, file);  in parse_zoffset()
348 		die("read-error on `zoffset.h'");  in parse_zoffset()
389 		die("Unable to write `%s': %m", argv[4]);  in main()
394 		die("Unable to open `%s': %m", argv[1]);  in main()
397 		die("read-error on `setup'");  in main()
399 		die("The setup must be at least 1024 bytes");  in main()
401 		die("Boot block hasn't got boot flag (0xAA55)");  in main()
412 	memset(buf+c, 0, i-c);  in main()
422 		die("Unable to open `%s': %m", argv[2]);  in main()
424 		die("Unable to stat `%s': %m", argv[2]);  in main()
428 		die("Unable to mmap '%s': %m", argv[2]);  in main()
429 	/* Number of 16-byte paragraphs, including space for a 4-byte CRC */  in main()
433 	 * COFF requires minimum 32-byte alignment of sections, and  in main()
440 	buf[0x1f1] = setup_sectors-1;  in main()
449 	 * [i, i + _ehead), and the destination is [init_sz - _end, init_sz).  in main()
454 	 * 'init_sz - _end' is at least 64k.  in main()
456 	 * For future-proofing, increase init_sz if necessary.  in main()
459 	if (init_sz - _end < i + _ehead) {  in main()
473 		die("Writing setup failed");  in main()
478 		die("Writing kernel failed");  in main()
481 	while (sz++ < (sys_size*16) - 4) {  in main()
484 			die("Writing padding failed");  in main()
490 		die("Writing CRC failed");  in main()
494 		die("Writing image failed");  in main()