+++ /dev/null
-/* XMODEM support for GDB, the GNU debugger.
- Copyright 1995, 2000, 2001 Free Software Foundation, Inc.
-
- This file is part of GDB.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-#include "defs.h"
-#include "serial.h"
-#include "target.h"
-#include "xmodem.h"
-
-/* These definitions are for xmodem protocol. */
-
-#define SOH 0x01
-#define STX 0x02
-#define ACK 0x06
-#define NAK 0x15
-#define EOT 0x04
-#define CANCEL 0x18
-
-static int blknum; /* XMODEM block number */
-static int crcflag; /* Sez we are using CRC's instead of cksums */
-
-static int
-readchar (struct serial *desc, int timeout)
-{
- int c;
-
- c = serial_readchar (desc, timeout);
-
- if (remote_debug > 0)
- fputc_unfiltered (c, gdb_stdlog);
-
- if (c >= 0)
- return c;
-
- if (c == SERIAL_TIMEOUT)
- error ("Timeout reading from remote system.");
-
- perror_with_name ("xmodem.c:readchar()");
-}
-
-#define CRC16 0x1021 /* Generator polynomial (X^16 + X^12 + X^5 + 1) */
-
-static unsigned short *crctab;
-
-/* Call this to init the fast CRC-16 calculation table. */
-
-static void
-crcinit (void)
-{
- static int crctab_inited = 0;
- int val;
-
- if (crctab_inited == 1)
- return;
-
- crctab = xmalloc (256 * sizeof (short));
-
- for (val = 0; val <= 255; val++)
- {
- int i;
- unsigned int crc;
-
- crc = val << 8;
-
- for (i = 0; i < 8; ++i)
- {
- crc <<= 1;
-
- if (crc & 0x10000)
- crc ^= CRC16;
- }
-
- crctab[val] = crc;
- }
-
- crctab_inited = 1;
-}
-
-/* Calculate a CRC-16 for the LEN byte message pointed at by P. */
-
-static unsigned short
-docrc (unsigned char *p, int len)
-{
- unsigned short crc = 0;
-
- while (len-- > 0)
- crc = (crc << 8) ^ crctab[(crc >> 8) ^ *p++];
-
- return crc;
-}
-
-/* Start up the transmit process. Reset state variables. Wait for receiver to
- send NAK or CRC request. */
-
-int
-xmodem_init_xfer (struct serial *desc)
-{
- int c;
- int i;
-
- blknum = 1;
- crcflag = 0;
- crcinit ();
-
- for (i = 1; i <= 10; i++)
- {
- c = readchar (desc, 6);
-
- switch (c)
- {
- case 'C':
- crcflag = 1;
- case NAK:
- return 0;
- default:
- fprintf_unfiltered (gdb_stderr, "xmodem_init_xfer: Got unexpected character %c (0%o)\n", c, c);
- continue;
- case CANCEL: /* target aborted load */
- fprintf_unfiltered (gdb_stderr, "Got a CANCEL from the target.\n");
- continue;
- }
- }
- error ("xmodem_init_xfer: Too many unexpected characters.");
-}
-
-/* Take 128 bytes of data and make a packet out of it.
-
- * Each packet looks like this:
- * +-----+-------+-------+------+-----+
- * | SOH | Seq1. | Seq2. | data | SUM |
- * +-----+-------+-------+------+-----+
- * SOH = 0x01
- * Seq1 = The sequence number.
- * Seq2 = The complement of the sequence number.
- * Data = A 128 bytes of data.
- * SUM = Add the contents of the 128 bytes and use the low-order
- * 8 bits of the result.
- *
- * send_xmodem_packet fills in the XMODEM fields of PACKET and sends it to the
- * remote system. PACKET must be XMODEM_PACKETSIZE bytes long. The data must
- * start 3 bytes after the beginning of the packet to leave room for the
- * XMODEM header. LEN is the length of the data portion of the packet (and
- * must be <= 128 bytes). If it is < 128 bytes, ^Z padding will be added.
- */
-
-void
-xmodem_send_packet (struct serial *desc, unsigned char *packet, int len, int hashmark)
-{
- int i;
- int retries;
- int pktlen;
- int datasize;
-
- /* build the packet header */
-
- packet[1] = blknum;
- packet[2] = ~blknum;
-
- blknum++;
-
- if (len <= XMODEM_DATASIZE)
- {
- packet[0] = SOH;
- datasize = XMODEM_DATASIZE;
- }
- else if (len <= XMODEM_1KDATASIZE)
- {
- packet[0] = STX;
- datasize = XMODEM_1KDATASIZE;
- }
- else
- internal_error (__FILE__, __LINE__, "failed internal consistency check"); /* Packet way too large */
-
- /* Add ^Z padding if packet < 128 (or 1024) bytes */
-
- memset (packet + 3 + len, '\026', datasize - len);
-
- if (crcflag)
- {
- int crc;
-
- crc = docrc (packet + 3, datasize);
-
- packet[3 + datasize] = crc >> 8;
- packet[3 + datasize + 1] = crc;
- pktlen = datasize + 5;
- }
- else
- {
- int sum;
-
- sum = 0;
- for (i = 3; i < datasize + 3; i++)
- sum += packet[i];
-
- packet[3 + datasize] = sum; /* add the checksum */
- pktlen = datasize + 4;
- }
-
- for (retries = 3; retries >= 0; retries--)
- {
- int c;
-
- serial_write (desc, packet, pktlen);
-
- c = readchar (desc, 3);
- switch (c)
- {
- case ACK:
- return;
- case NAK:
- if (!hashmark)
- continue;
- putchar_unfiltered ('-');
- gdb_flush (gdb_stdout);
- continue;
- case CANCEL:
- error ("xmodem_send_packet: Transfer aborted by receiver.");
- default:
- fprintf_unfiltered (gdb_stderr, "xmodem_send_packet: Got unexpected character %c (0%o)\n", c, c);
- continue;
- }
- }
-
- serial_write (desc, "\004", 1); /* Send an EOT */
-
- error ("xmodem_send_packet: Excessive retries.");
-}
-
-/* Finish off the transfer. Send out the EOT, and wait for an ACK. */
-
-void
-xmodem_finish_xfer (struct serial *desc)
-{
- int retries;
-
- for (retries = 10; retries >= 0; retries--)
- {
- int c;
-
- serial_write (desc, "\004", 1); /* Send an EOT */
-
- c = readchar (desc, 3);
- switch (c)
- {
- case ACK:
- return;
- case NAK:
- continue;
- case CANCEL:
- error ("xmodem_finish_xfer: Transfer aborted by receiver.");
- default:
- fprintf_unfiltered (gdb_stderr, "xmodem_send_packet: Got unexpected character %c (0%o)\n", c, c);
- continue;
- }
- }
-
- error ("xmodem_finish_xfer: Excessive retries.");
-}
+++ /dev/null
-/* XMODEM support for GDB, the GNU debugger.
- Copyright 1995, 2000 Free Software Foundation, Inc.
-
- This file is part of GDB.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-struct serial;
-
-int xmodem_init_xfer (struct serial *desc);
-void send_xmodem_packet (struct serial *desc, unsigned char *packet, int len,
- int hashmark);
-void xmodem_finish_xfer (struct serial *desc);
-
-#define XMODEM_DATASIZE 128 /* The data size is ALWAYS 128 */
-#define XMODEM_1KDATASIZE 1024 /* Unless it's 1024!!! */
-#define XMODEM_PACKETSIZE 133 /* data + packet headers and crc */
-#define XMODEM_1KPACKETSIZE 1024 + 5 /* data + packet headers and crc */
-#define XMODEM_DATAOFFSET 3 /* Offset to start of actual data */
projects / binutils-gdb.git / commitdiff