/* Remote target communications for serial-line targets in custom GDB protocol
- Copyright 1988, 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+ Copyright 1988, 1991, 1992, 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
This file is part of GDB.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Remote communication protocol.
for step or cont : SAA where AA is the
signal number.
+ detach D Reply OK.
+
There is no immediate reply to step or cont.
The reply comes when the machine stops.
It is SAA AA is the signal number.
targets.
or... XAA The process terminated with signal
AA.
- or... Otext Send text to stdout. This can happen
- at any time while the program is
+ or... OXX..XX XX..XX is hex encoding of ASCII data. This
+ can happen at any time while the program is
running and the debugger should
continue to wait for 'W', 'T', etc.
#include "symfile.h"
#include "target.h"
#include "wait.h"
-#include "terminal.h"
+/*#include "terminal.h"*/
#include "gdbcmd.h"
#include "objfiles.h"
#include "gdb-stabs.h"
-#include "thread.h"
+#include "gdbthread.h"
#include "dcache.h"
static void interrupt_query PARAMS ((void));
+static void set_thread PARAMS ((int, int));
+
+static int remote_thread_alive PARAMS ((int));
+
+static void get_offsets PARAMS ((void));
+
+static int read_frame PARAMS ((char *));
+
+static int remote_insert_breakpoint PARAMS ((CORE_ADDR, char *));
+
+static int remote_remove_breakpoint PARAMS ((CORE_ADDR, char *));
+
extern struct target_ops remote_ops; /* Forward decl */
extern struct target_ops extended_remote_ops; /* Forward decl */
other form of hairy serial connection, I would think 2 seconds would
be plenty. */
-static int remote_timeout = 2;
+/* Changed to allow option to set timeout value.
+ was static int remote_timeout = 2; */
+extern int remote_timeout;
+
+/* This variable chooses whether to send a ^C or a break when the user
+ requests program interruption. Although ^C is usually what remote
+ systems expect, and that is the default here, sometimes a break is
+ preferable instead. */
+
+static int remote_break;
/* Descriptor for I/O to remote machine. Initialize it to NULL so that
remote_open knows that we don't have a file open when the program
#define PBUFSIZ (REGISTER_BYTES * 2 + 32)
#endif
+/* This variable sets the number of bytes to be written to the target
+ in a single packet. Normally PBUFSIZ is satisfactory, but some
+ targets need smaller values (perhaps because the receiving end
+ is slow). */
+
+static int remote_write_size = PBUFSIZ;
+
/* Should we try the 'P' request? If this is set to one when the stub
doesn't support 'P', the only consequence is some unnecessary traffic. */
static int stub_supports_P = 1;
}
/* Open a connection to a remote debugger using the extended
- remote gdb protocol. NAME is hte filename used for communication. */
+ remote gdb protocol. NAME is the filename used for communication. */
static void
extended_remote_open (name, from_tty)
pop_target();
}
-/* remote_detach()
- takes a program previously attached to and detaches it.
- We better not have left any breakpoints
- in the program or it'll die when it hits one.
- Close the open connection to the remote debugger.
- Use this when you want to detach and do something else
- with your gdb. */
+/* This takes a program previously attached to and detaches it. After
+ this is done, GDB can be used to debug some other program. We
+ better not have left any breakpoints in the target program or it'll
+ die when it hits one. */
static void
remote_detach (args, from_tty)
char *args;
int from_tty;
{
+ char buf[PBUFSIZ];
+
if (args)
error ("Argument given to \"detach\" when remotely debugging.");
-
+
+ /* Tell the remote target to detach. */
+ strcpy (buf, "D");
+ remote_send (buf);
+
pop_target ();
if (from_tty)
puts_filtered ("Ending remote debugging.\n");
return a - '0';
else if (a >= 'a' && a <= 'f')
return a - 'a' + 10;
- else
+ else
error ("Reply contains invalid hex digit %d", a);
}
if (remote_debug)
printf_unfiltered ("remote_interrupt called\n");
- SERIAL_WRITE (remote_desc, "\003", 1); /* Send a ^C */
+ /* Send a break or a ^C, depending on user preference. */
+ if (remote_break)
+ SERIAL_SEND_BREAK (remote_desc);
+ else
+ SERIAL_WRITE (remote_desc, "\003", 1);
}
static void (*ofunc)();
{
unsigned char *p1;
char *p_temp;
- unsigned LONGEST val;
regno = strtol ((const char *) p, &p_temp, 16); /* Read the register number */
p1 = (unsigned char *)p_temp;
Packet: '%s'\n",
regno, p, buf);
- val = 0L;
for (i = 0; i < REGISTER_RAW_SIZE (regno); i++)
{
if (p[0] == 0 || p[1] == 0)
warning ("Remote reply is too short: %s", buf);
- val = val * 256 + fromhex (p[0]) * 16 + fromhex (p[1]);
+ regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
p += 2;
-
}
- store_unsigned_integer (regs, REGISTER_RAW_SIZE (regno), val);
supply_register (regno, regs);
}
goto got_status;
case 'O': /* Console output */
- fputs_filtered ((char *)(buf + 1), gdb_stdout);
+ for (p = buf + 1; *p; p +=2)
+ {
+ char tb[2];
+ char c = fromhex (p[0]) * 16 + fromhex (p[1]);
+ tb[0] = c;
+ tb[1] = 0;
+ if (target_output_hook)
+ target_output_hook (tb);
+ else
+ fputs_filtered (tb, gdb_stdout);
+ }
continue;
case '\0':
if (last_sent_signal != TARGET_SIGNAL_0)
char buf[PBUFSIZ];
int i;
char *p;
+ int done;
+ /* Chop the transfer down if necessary */
- /* FIXME-32x64: Need a version of print_address_numeric which puts the
- result in a buffer like sprintf. */
- sprintf (buf, "M%lx,%x:", (unsigned long) memaddr, len);
+ done = 0;
+ while (done < len)
+ {
+ int todo = len - done;
+ int cando = min(remote_write_size, PBUFSIZ) / 2 - 32; /* num bytes that will fit */
- /* We send target system values byte by byte, in increasing byte addresses,
- each byte encoded as two hex characters. */
+ if (todo > cando)
+ todo = cando;
- p = buf + strlen (buf);
- for (i = 0; i < len; i++)
- {
- *p++ = tohex ((myaddr[i] >> 4) & 0xf);
- *p++ = tohex (myaddr[i] & 0xf);
- }
- *p = '\0';
+ /* FIXME-32x64: Need a version of print_address_numeric which puts the
+ result in a buffer like sprintf. */
+ sprintf (buf, "M%lx,%x:", (unsigned long) memaddr + done, todo);
- putpkt (buf);
- getpkt (buf, 0);
+ /* We send target system values byte by byte, in increasing byte addresses,
+ each byte encoded as two hex characters. */
- if (buf[0] == 'E')
- {
- /* There is no correspondance between what the remote protocol uses
- for errors and errno codes. We would like a cleaner way of
- representing errors (big enough to include errno codes, bfd_error
- codes, and others). But for now just return EIO. */
- errno = EIO;
- return 0;
+ p = buf + strlen (buf);
+ for (i = 0; i < todo; i++)
+ {
+ *p++ = tohex ((myaddr[i + done] >> 4) & 0xf);
+ *p++ = tohex (myaddr[i + done] & 0xf);
+ }
+ *p = '\0';
+
+ putpkt (buf);
+ getpkt (buf, 0);
+
+ if (buf[0] == 'E')
+ {
+ /* There is no correspondance between what the remote protocol uses
+ for errors and errno codes. We would like a cleaner way of
+ representing errors (big enough to include errno codes, bfd_error
+ codes, and others). But for now just return EIO. */
+ errno = EIO;
+ return 0;
+ }
+ done += todo;
}
return len;
}
char buf[PBUFSIZ];
int i;
char *p;
+ int done;
+ /* Chop transfer down if neccessary */
+#if 0
+ /* FIXME: This is wrong for larger packets */
if (len > PBUFSIZ / 2 - 1)
abort ();
-
- /* FIXME-32x64: Need a version of print_address_numeric which puts the
- result in a buffer like sprintf. */
- sprintf (buf, "m%lx,%x", (unsigned long) memaddr, len);
- putpkt (buf);
- getpkt (buf, 0);
-
- if (buf[0] == 'E')
+#endif
+ done = 0;
+ while (done < len)
{
- /* There is no correspondance between what the remote protocol uses
- for errors and errno codes. We would like a cleaner way of
- representing errors (big enough to include errno codes, bfd_error
- codes, and others). But for now just return EIO. */
- errno = EIO;
- return 0;
- }
+ int todo = len - done;
+ int cando = PBUFSIZ / 2 - 32; /* number of bytes that will fit. */
+ if (todo > cando)
+ todo = cando;
+
+ /* FIXME-32x64: Need a version of print_address_numeric which puts the
+ result in a buffer like sprintf. */
+ sprintf (buf, "m%lx,%x", (unsigned long) memaddr + done, todo);
+ putpkt (buf);
+ getpkt (buf, 0);
+
+ if (buf[0] == 'E')
+ {
+ /* There is no correspondance between what the remote protocol uses
+ for errors and errno codes. We would like a cleaner way of
+ representing errors (big enough to include errno codes, bfd_error
+ codes, and others). But for now just return EIO. */
+ errno = EIO;
+ return 0;
+ }
/* Reply describes memory byte by byte,
each byte encoded as two hex characters. */
- p = buf;
- for (i = 0; i < len; i++)
- {
- if (p[0] == 0 || p[1] == 0)
- /* Reply is short. This means that we were able to read only part
- of what we wanted to. */
- break;
- myaddr[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
- p += 2;
+ p = buf;
+ for (i = 0; i < todo; i++)
+ {
+ if (p[0] == 0 || p[1] == 0)
+ /* Reply is short. This means that we were able to read only part
+ of what we wanted to. */
+ return i + done;
+ myaddr[i + done] = fromhex (p[0]) * 16 + fromhex (p[1]);
+ p += 2;
+ }
+ done += todo;
}
- return i;
+ return len;
}
\f
/* Read or write LEN bytes from inferior memory at MEMADDR, transferring
/* Copy the packet into buffer BUF2, encapsulating it
and giving it a checksum. */
- if (cnt > sizeof(buf2) - 5) /* Prosanity check */
+ if (cnt > (int) sizeof (buf2) - 5) /* Prosanity check */
abort();
p = buf2;
}
\f
-#ifdef REMOTE_BREAKPOINT
-
/* On some machines, e.g. 68k, we may use a different breakpoint instruction
- than other targets. */
-static unsigned char break_insn[] = REMOTE_BREAKPOINT;
+ than other targets; in those use REMOTE_BREAKPOINT instead of just
+ BREAKPOINT. Also, bi-endian targets may define LITTLE_REMOTE_BREAKPOINT
+ and BIG_REMOTE_BREAKPOINT. If none of these are defined, we just call
+ the standard routines that are in mem-break.c. */
+
+/* FIXME, these ought to be done in a more dynamic fashion. For instance,
+ the choice of breakpoint instruction affects target program design and
+ vice versa, and by making it user-tweakable, the special code here
+ goes away and we need fewer special GDB configurations. */
+
+#if defined (LITTLE_REMOTE_BREAKPOINT) && defined (BIG_REMOTE_BREAKPOINT) && !defined(REMOTE_BREAKPOINT)
+#define REMOTE_BREAKPOINT
+#endif
-#else /* No REMOTE_BREAKPOINT. */
+#ifdef REMOTE_BREAKPOINT
-/* Same old breakpoint instruction. This code does nothing different
- than mem-break.c. */
-static unsigned char break_insn[] = BREAKPOINT;
+/* If the target isn't bi-endian, just pretend it is. */
+#if !defined (LITTLE_REMOTE_BREAKPOINT) && !defined (BIG_REMOTE_BREAKPOINT)
+#define LITTLE_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
+#define BIG_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
+#endif
-#endif /* No REMOTE_BREAKPOINT. */
+static unsigned char big_break_insn[] = BIG_REMOTE_BREAKPOINT;
+static unsigned char little_break_insn[] = LITTLE_REMOTE_BREAKPOINT;
+
+#endif /* REMOTE_BREAKPOINT */
/* Insert a breakpoint on targets that don't have any better breakpoint
support. We read the contents of the target location and stash it,
CORE_ADDR addr;
char *contents_cache;
{
+#ifdef REMOTE_BREAKPOINT
int val;
- val = target_read_memory (addr, contents_cache, sizeof break_insn);
+ val = target_read_memory (addr, contents_cache, sizeof big_break_insn);
if (val == 0)
- val = target_write_memory (addr, (char *)break_insn, sizeof break_insn);
+ {
+ if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+ val = target_write_memory (addr, (char *) big_break_insn,
+ sizeof big_break_insn);
+ else
+ val = target_write_memory (addr, (char *) little_break_insn,
+ sizeof little_break_insn);
+ }
return val;
+#else
+ return memory_insert_breakpoint (addr, contents_cache);
+#endif /* REMOTE_BREAKPOINT */
}
static int
CORE_ADDR addr;
char *contents_cache;
{
- return target_write_memory (addr, contents_cache, sizeof break_insn);
+#ifdef REMOTE_BREAKPOINT
+ return target_write_memory (addr, contents_cache, sizeof big_break_insn);
+#else
+ return memory_remove_breakpoint (addr, contents_cache);
+#endif /* REMOTE_BREAKPOINT */
}
\f
/* Define the target subroutine names */
remote_prepare_to_store, /* to_prepare_to_store */
remote_xfer_memory, /* to_xfer_memory */
remote_files_info, /* to_files_info */
-
remote_insert_breakpoint, /* to_insert_breakpoint */
remote_remove_breakpoint, /* to_remove_breakpoint */
-
NULL, /* to_terminal_init */
NULL, /* to_terminal_inferior */
NULL, /* to_terminal_ours_for_output */
{
add_target (&remote_ops);
add_target (&extended_remote_ops);
+
+ add_show_from_set (add_set_cmd ("remotetimeout", no_class,
+ var_integer, (char *)&remote_timeout,
+ "Set timeout value for remote read.\n", &setlist),
+ &showlist);
+
+ add_show_from_set (add_set_cmd ("remotebreak", no_class,
+ var_integer, (char *)&remote_break,
+ "Set whether to send break if interrupted.\n", &setlist),
+ &showlist);
+
+ add_show_from_set (add_set_cmd ("remotewritesize", no_class,
+ var_integer, (char *)&remote_write_size,
+ "Set the maximum number of bytes in each memory write packet.\n", &setlist),
+ &showlist);
}
projects / deliverable / binutils-gdb.git / blobdiff