Annotation of sys/arch/mvme68k/stand/sboot/srec.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: srec.c,v 1.5 2003/08/19 10:22:30 deraadt Exp $ */
! 2:
! 3: /*
! 4: * Public domain, believed to be by Mike Price.
! 5: *
! 6: * convert binary file to Srecord format
! 7: */
! 8: #include <stdio.h>
! 9: #include <ctype.h>
! 10:
! 11: int get32();
! 12: void put32();
! 13: void sput();
! 14: void put();
! 15: int checksum();
! 16:
! 17: int mask;
! 18: int size;
! 19:
! 20: main(int argc, char *argv[])
! 21: {
! 22: char buf[32], *name;
! 23: int cc, base, addr;
! 24:
! 25: if (argc != 4) {
! 26: fprintf(stderr, "usage: %s {size} {hex_addr} {name}\n", argv[0]);
! 27: fprintf(stderr, "Size = 2, 3, or 4 byte address\n");
! 28: exit(1);
! 29: }
! 30: sscanf(argv[1], "%x", &size);
! 31: mask = (1 << (size * 8)) - 1;
! 32: if (!mask)
! 33: mask = (-1);
! 34: sscanf(argv[2], "%x", &base);
! 35: name = argv[3];
! 36:
! 37: if (size == 2)
! 38: printf("S0%02X%04X", 2 + strlen(name) + 1, 0);
! 39: if (size == 3)
! 40: printf("S0%02X%06X", 3 + strlen(name) + 1, 0);
! 41: if (size == 4)
! 42: printf("S0%02X%08X", 4 + strlen(name) + 1, 0);
! 43: sput(name);
! 44: printf("%02X\n", checksum(0, name, strlen(name), size));
! 45:
! 46: addr = base;
! 47: for (;;) {
! 48: cc = get32(buf);
! 49: if (cc > 0) {
! 50: put32(cc, addr, buf, size, mask);
! 51: addr += cc;
! 52: } else
! 53: break;
! 54: }
! 55:
! 56: buf[0] = base >> 8;
! 57: buf[1] = base;
! 58: printf("S%d%02X", 11 - size, 2 + 1);
! 59: switch (size) {
! 60: case 2:
! 61: printf("%04X", base & mask);
! 62: break;
! 63: case 3:
! 64: printf("%06X", base & mask);
! 65: break;
! 66: case 4:
! 67: printf("%08X", base & mask);
! 68: break;
! 69: }
! 70:
! 71: /*
! 72: * kludge -> some sizes need an extra count (1 if size == 3, 2 if
! 73: * size == 4). Don't ask why.
! 74: */
! 75: printf("%02X\n", checksum(base, (char *) 0, 0, size) +
! 76: (size - 2));
! 77: exit (0);
! 78: }
! 79:
! 80: int
! 81: get32(char buf[])
! 82: {
! 83: char *cp = buf;
! 84: int i, c;
! 85:
! 86: for (i = 0; i < 32; ++i) {
! 87: if ((c = getchar()) != EOF)
! 88: *cp++ = c;
! 89: else
! 90: break;
! 91: }
! 92: return (cp - buf);
! 93: }
! 94:
! 95: void
! 96: put32(int len, int addr, char buf[], int size, int mask)
! 97: {
! 98: char *cp = buf;
! 99: int i;
! 100:
! 101: if (size == 2)
! 102: printf("S1%02X%04X", 2 + len + 1, addr & mask);
! 103: if (size == 3)
! 104: printf("S2%02X%06X", 3 + len + 1, addr & mask);
! 105: if (size == 4)
! 106: printf("S3%02X%08X", 4 + len + 1, addr & mask);
! 107: for (i = 0; i < len; ++i)
! 108: put(*cp++);
! 109: printf("%02X\n", checksum(addr, buf, len, size));
! 110: }
! 111:
! 112: void
! 113: sput(char *s)
! 114: {
! 115: while (*s != '\0')
! 116: put(*s++);
! 117: }
! 118:
! 119: void
! 120: put(int c)
! 121: {
! 122: printf("%02X", c & 0xff);
! 123: }
! 124:
! 125: int
! 126: checksum(int addr, char buf[], int len, int size)
! 127: {
! 128: char *cp = buf;
! 129: int sum = 0xff - 1 - size - (len & 0xff);
! 130: int i;
! 131:
! 132: if (size == 4)
! 133: sum -= (addr >> 24) & 0xff;
! 134: if (size >= 3)
! 135: sum -= (addr >> 16) & 0xff;
! 136: sum -= (addr >> 8) & 0xff;
! 137: sum -= addr & 0xff;
! 138: for (i = 0; i < len; ++i) {
! 139: sum -= *cp++ & 0xff;
! 140: }
! 141: return (sum & 0xff);
! 142: }
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