aboutsummaryrefslogtreecommitdiff
path: root/gdb/dsrec.c
diff options
context:
space:
mode:
Diffstat (limited to 'gdb/dsrec.c')
-rw-r--r--gdb/dsrec.c312
1 files changed, 312 insertions, 0 deletions
diff --git a/gdb/dsrec.c b/gdb/dsrec.c
new file mode 100644
index 0000000..06c2929
--- /dev/null
+++ b/gdb/dsrec.c
@@ -0,0 +1,312 @@
+/* S-record download support for GDB, the GNU debugger.
+ Copyright 1995, 1996, 1997 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 "srec.h"
+#include <time.h>
+
+int (*ui_load_progress_hook) PARAMS ((char *, unsigned long));
+extern void report_transfer_performance PARAMS ((unsigned long, time_t, time_t));
+
+extern int remote_debug;
+
+static int make_srec PARAMS ((char *srec, CORE_ADDR targ_addr, bfd *abfd,
+ asection *sect, int sectoff, int *maxrecsize,
+ int flags));
+
+/* Download an executable by converting it to S records. DESC is a
+ serial_t to send the data to. FILE is the name of the file to be
+ loaded. LOAD_OFFSET is the offset into memory to load data into.
+ It is usually specified by the user and is useful with the a.out
+ file format. MAXRECSIZE is the length in chars of the largest
+ S-record the host can accomodate. This is measured from the
+ starting `S' to the last char of the checksum. FLAGS is various
+ random flags, and HASHMARK is non-zero to cause a `#' to be
+ printed out for each record loaded. WAITACK, if non-NULL, is a
+ function that waits for an acknowledgement after each S-record,
+ and returns non-zero if the ack is read correctly. */
+
+void
+load_srec (desc, file, load_offset, maxrecsize, flags, hashmark, waitack)
+ serial_t desc;
+ const char *file;
+ bfd_vma load_offset;
+ int maxrecsize;
+ int flags;
+ int hashmark;
+ int (*waitack) PARAMS ((void));
+{
+ bfd *abfd;
+ asection *s;
+ char *srec;
+ int i;
+ int reclen;
+ time_t start_time, end_time;
+ unsigned long data_count = 0;
+
+ srec = (char *) alloca (maxrecsize + 1);
+
+ abfd = bfd_openr (file, 0);
+ if (!abfd)
+ {
+ printf_filtered ("Unable to open file %s\n", file);
+ return;
+ }
+
+ if (bfd_check_format (abfd, bfd_object) == 0)
+ {
+ printf_filtered ("File is not an object file\n");
+ return;
+ }
+
+ start_time = time (NULL);
+
+ /* Write a type 0 header record. no data for a type 0, and there
+ is no data, so len is 0. */
+
+ reclen = maxrecsize;
+ make_srec (srec, 0, NULL, (asection *)1, 0, &reclen, flags);
+ if (remote_debug)
+ {
+ srec[reclen] = '\0';
+ puts_debug ("sent -->", srec, "<--");
+ }
+ SERIAL_WRITE (desc, srec, reclen);
+
+ for (s = abfd->sections; s; s = s->next)
+ if (s->flags & SEC_LOAD)
+ {
+ int numbytes;
+ bfd_vma addr = bfd_get_section_vma (abfd, s) + load_offset;
+ bfd_size_type size = bfd_get_section_size_before_reloc (s);
+ char * section_name = (char *)bfd_get_section_name (abfd, s);
+ printf_filtered ("%s\t: 0x%08x .. 0x%08x ",
+ section_name, (int) addr, (int) addr + size);
+ gdb_flush (gdb_stdout);
+
+ data_count += size;
+
+ for (i = 0; i < size; i += numbytes)
+ {
+ reclen = maxrecsize;
+ numbytes = make_srec (srec, (CORE_ADDR) (addr + i), abfd, s,
+ i, &reclen, flags);
+
+ if (remote_debug)
+ {
+ srec[reclen] = '\0';
+ puts_debug ("sent -->", srec, "<--");
+ }
+
+ /* Repeatedly send the S-record until a good
+ acknowledgement is sent back. */
+ do
+ {
+ SERIAL_WRITE (desc, srec, reclen);
+ if (ui_load_progress_hook)
+ if (ui_load_progress_hook (section_name, (unsigned long) i))
+ error ("Canceled the download");
+ }
+ while (waitack != NULL && !waitack ());
+
+ if (hashmark)
+ {
+ putchar_unfiltered ('#');
+ gdb_flush (gdb_stdout);
+ }
+ } /* Per-packet (or S-record) loop */
+
+ if (ui_load_progress_hook)
+ if (ui_load_progress_hook (section_name, (unsigned long) i))
+ error ("Canceled the download");
+ putchar_unfiltered ('\n');
+ }
+
+ if (hashmark)
+ putchar_unfiltered ('\n');
+
+ end_time = time (NULL);
+
+ /* Write a terminator record. */
+
+ reclen = maxrecsize;
+ make_srec (srec, abfd->start_address, NULL, NULL, 0, &reclen, flags);
+
+ if (remote_debug)
+ {
+ srec[reclen] = '\0';
+ puts_debug ("sent -->", srec, "<--");
+ }
+
+ SERIAL_WRITE (desc, srec, reclen);
+
+ /* Some monitors need these to wake up properly. (Which ones? -sts) */
+ SERIAL_WRITE (desc, "\r\r", 2);
+ if (remote_debug)
+ puts_debug ("sent -->", "\r\r", "<---");
+
+ SERIAL_FLUSH_INPUT (desc);
+
+ report_transfer_performance (data_count, start_time, end_time);
+}
+
+/*
+ * make_srec -- make an srecord. This writes each line, one at a
+ * time, each with it's own header and trailer line.
+ * An srecord looks like this:
+ *
+ * byte count-+ address
+ * start ---+ | | data +- checksum
+ * | | | |
+ * S01000006F6B692D746573742E73726563E4
+ * S315000448600000000000000000FC00005900000000E9
+ * S31A0004000023C1400037DE00F023604000377B009020825000348D
+ * S30B0004485A0000000000004E
+ * S70500040000F6
+ *
+ * S<type><length><address><data><checksum>
+ *
+ * Where
+ * - length
+ * is the number of bytes following upto the checksum. Note that
+ * this is not the number of chars following, since it takes two
+ * chars to represent a byte.
+ * - type
+ * is one of:
+ * 0) header record
+ * 1) two byte address data record
+ * 2) three byte address data record
+ * 3) four byte address data record
+ * 7) four byte address termination record
+ * 8) three byte address termination record
+ * 9) two byte address termination record
+ *
+ * - address
+ * is the start address of the data following, or in the case of
+ * a termination record, the start address of the image
+ * - data
+ * is the data.
+ * - checksum
+ * is the sum of all the raw byte data in the record, from the length
+ * upwards, modulo 256 and subtracted from 255.
+ *
+ * This routine returns the length of the S-record.
+ *
+ */
+
+static int
+make_srec (srec, targ_addr, abfd, sect, sectoff, maxrecsize, flags)
+ char *srec;
+ CORE_ADDR targ_addr;
+ bfd *abfd;
+ asection *sect;
+ int sectoff;
+ int *maxrecsize;
+ int flags;
+{
+ unsigned char checksum;
+ int tmp;
+ const static char hextab[] = "0123456789ABCDEF";
+ const static char data_code_table[] = "123";
+ const static char term_code_table[] = "987";
+ const static char header_code_table[] = "000";
+ const static char *formats[] = { "S%c%02X%04X",
+ "S%c%02X%06X",
+ "S%c%02X%08X" };
+ char const *code_table;
+ int addr_size;
+ int payload_size;
+ char *binbuf;
+ char *p;
+
+ if (sect)
+ {
+ tmp = flags; /* Data or header record */
+ code_table = abfd ? data_code_table : header_code_table;
+ binbuf = alloca (*maxrecsize/2);
+ }
+ else
+ {
+ tmp = flags >> SREC_TERM_SHIFT; /* Term record */
+ code_table = term_code_table;
+ }
+
+ if ((tmp & SREC_2_BYTE_ADDR) && (targ_addr <= 0xffff))
+ addr_size = 2;
+ else if ((tmp & SREC_3_BYTE_ADDR) && (targ_addr <= 0xffffff))
+ addr_size = 3;
+ else if (tmp & SREC_4_BYTE_ADDR)
+ addr_size = 4;
+ else
+ fatal ("make_srec: Bad address (0x%x), or bad flags (0x%x).",
+ targ_addr, flags);
+
+ /* Now that we know the address size, we can figure out how much
+ data this record can hold. */
+
+ if (sect && abfd)
+ {
+ payload_size = (*maxrecsize - (1 + 1 + 2 + addr_size * 2 + 2)) / 2;
+ payload_size = min (payload_size, sect->_raw_size - sectoff);
+
+ bfd_get_section_contents (abfd, sect, binbuf, sectoff, payload_size);
+ }
+ else
+ payload_size = 0; /* Term or header packets have no payload */
+
+ /* Output the header. */
+
+ sprintf (srec, formats[addr_size - 2], code_table[addr_size - 2],
+ addr_size + payload_size + 1, (int)targ_addr);
+
+ /* Note that the checksum is calculated on the raw data, not the
+ hexified data. It includes the length, address and the data
+ portions of the packet. */
+
+ checksum = 0;
+
+ checksum += (payload_size + addr_size + 1 /* Packet length */
+ + (targ_addr & 0xff) /* Address... */
+ + ((targ_addr >> 8) & 0xff)
+ + ((targ_addr >> 16) & 0xff)
+ + ((targ_addr >> 24) & 0xff));
+
+ p = srec + 1 + 1 + 2 + addr_size * 2;
+
+ /* Build the Srecord. */
+ for (tmp = 0; tmp < payload_size; tmp++)
+ {
+ unsigned char k;
+
+ k = binbuf[tmp];
+ *p++ = hextab [k >> 4];
+ *p++ = hextab [k & 0xf];
+ checksum += k;
+ }
+
+ checksum = ~checksum;
+
+ *p++ = hextab[checksum >> 4];
+ *p++ = hextab[checksum & 0xf];
+ *p++ = '\r';
+
+ *maxrecsize = p - srec;
+ return payload_size;
+}
generated by cgit v1.1 at 2024-11-24 03:27:07 +0000