/* 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, 1997 Free Software Foundation, Inc.
This file is part of GDB.
If AA..AA is omitted,
resume at same address.
- continue with Csig;AA Continue with signal sig (hex signal
- signal number).
+ continue with Csig;AA..AA Continue with signal sig (hex signal
+ signal number). If ;AA..AA is omitted, resume
+ at same address.
- step with Ssig;AA Like 'C' but step not continue.
+ step with Ssig;AA..AA Like 'C' but step not continue.
signal
last signal ? Reply the current reason for stopping.
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.
running and the debugger should
continue to wait for 'W', 'T', etc.
- or... Otext Send text to stdout.
-
thread alive TXX Find out if the thread XX is alive.
reply OK thread is still alive
ENN thread is dead
#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 extended_remote_open PARAMS ((char *name, int from_tty));
-static void remote_open_1 PARAMS ((char *, int, struct target_ops *));
+static void remote_open_1 PARAMS ((char *, int, struct target_ops *, int extended_p));
static void remote_close PARAMS ((int quitting));
static void remote_mourn_1 PARAMS ((struct target_ops *));
-static void getpkt PARAMS ((char *buf, int forever));
-
-static int putpkt PARAMS ((char *buf));
-
static void remote_send PARAMS ((char *buf));
static int readchar PARAMS ((int timeout));
static int tohex PARAMS ((int nib));
-static int fromhex PARAMS ((int a));
-
static void remote_detach PARAMS ((char *args, int from_tty));
static void remote_interrupt PARAMS ((int signo));
static void interrupt_query PARAMS ((void));
-extern struct target_ops remote_ops; /* Forward decl */
-extern struct target_ops extended_remote_ops; /* Forward decl */
+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 *));
+
+static int hexnumlen PARAMS ((ULONGEST num));
+
+/* exported functions */
+
+extern int fromhex PARAMS ((int a));
+extern void getpkt PARAMS ((char *buf, int forever));
+extern int putpkt PARAMS ((char *buf));
+
+/* Define the target subroutine names */
+
+static struct target_ops remote_ops ;
+
+static void init_remote_ops(void)
+{
+ remote_ops.to_shortname = "remote";
+ remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
+ remote_ops.to_doc = "Use a remote computer via a serial line; using a gdb-specific protocol.\n\
+Specify the serial device it is connected to (e.g. /dev/ttya)." ;
+ remote_ops.to_open = remote_open;
+ remote_ops.to_close = remote_close;
+ remote_ops.to_attach = NULL;
+ remote_ops.to_detach = remote_detach;
+ remote_ops.to_resume = remote_resume;
+ remote_ops.to_wait = remote_wait;
+ remote_ops.to_fetch_registers = remote_fetch_registers;
+ remote_ops.to_store_registers = remote_store_registers;
+ remote_ops.to_prepare_to_store = remote_prepare_to_store;
+ remote_ops.to_xfer_memory = remote_xfer_memory;
+ remote_ops.to_files_info = remote_files_info;
+ remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
+ remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
+ remote_ops.to_terminal_init = NULL;
+ remote_ops.to_terminal_inferior = NULL;
+ remote_ops.to_terminal_ours_for_output = NULL;
+ remote_ops.to_terminal_ours = NULL;
+ remote_ops.to_terminal_info = NULL;
+ remote_ops.to_kill = remote_kill;
+ remote_ops.to_load = generic_load;
+ remote_ops.to_lookup_symbol = NULL;
+ remote_ops.to_create_inferior = NULL;
+ remote_ops.to_mourn_inferior = remote_mourn;
+ remote_ops.to_can_run = 0;
+ remote_ops.to_notice_signals = 0;
+ remote_ops.to_thread_alive = remote_thread_alive;
+ remote_ops.to_stop = 0;
+ remote_ops.to_stratum = process_stratum;
+ remote_ops.DONT_USE = NULL;
+ remote_ops.to_has_all_memory = 1;
+ remote_ops.to_has_memory = 1;
+ remote_ops.to_has_stack = 1;
+ remote_ops.to_has_registers = 1;
+ remote_ops.to_has_execution = 1;
+ remote_ops.to_sections = NULL;
+ remote_ops.to_sections_end = NULL;
+ remote_ops.to_magic = OPS_MAGIC ;
+} /* init_remote_ops */
+
+static struct target_ops extended_remote_ops ;
+
+static void init_extended_remote_ops(void)
+{
+ extended_remote_ops.to_shortname = "extended-remote";
+ extended_remote_ops.to_longname = "Extended remote serial target in gdb-specific protocol";
+ extended_remote_ops.to_doc = "Use a remote computer via a serial line; using a gdb-specific protocol.\n\
+Specify the serial device it is connected to (e.g. /dev/ttya).",
+ extended_remote_ops.to_open = extended_remote_open;
+ extended_remote_ops.to_close = remote_close;
+ extended_remote_ops.to_attach = NULL;
+ extended_remote_ops.to_detach = remote_detach;
+ extended_remote_ops.to_resume = remote_resume;
+ extended_remote_ops.to_wait = remote_wait;
+ extended_remote_ops.to_fetch_registers = remote_fetch_registers;
+ extended_remote_ops.to_store_registers = remote_store_registers;
+ extended_remote_ops.to_prepare_to_store = remote_prepare_to_store;
+ extended_remote_ops.to_xfer_memory = remote_xfer_memory;
+ extended_remote_ops.to_files_info = remote_files_info;
+ extended_remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
+ extended_remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
+ extended_remote_ops.to_terminal_init = NULL;
+ extended_remote_ops.to_terminal_inferior = NULL;
+ extended_remote_ops.to_terminal_ours_for_output = NULL;
+ extended_remote_ops.to_terminal_ours = NULL;
+ extended_remote_ops.to_terminal_info = NULL;
+ extended_remote_ops.to_kill = remote_kill;
+ extended_remote_ops.to_load = generic_load;
+ extended_remote_ops.to_lookup_symbol = NULL;
+ extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
+ extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
+ extended_remote_ops.to_can_run = 0;
+ extended_remote_ops.to_notice_signals = 0;
+ extended_remote_ops.to_thread_alive = remote_thread_alive;
+ extended_remote_ops.to_stop = 0;
+ extended_remote_ops.to_stratum = process_stratum;
+ extended_remote_ops.DONT_USE = NULL;
+ extended_remote_ops.to_has_all_memory = 1;
+ extended_remote_ops.to_has_memory = 1;
+ extended_remote_ops.to_has_stack = 1;
+ extended_remote_ops.to_has_registers = 1;
+ extended_remote_ops.to_has_execution = 1;
+ extended_remote_ops.to_sections = NULL;
+ extended_remote_ops.to_sections_end = NULL;
+ extended_remote_ops.to_magic = OPS_MAGIC ;
+}
+
/* This was 5 seconds, which is a long time to sit and wait.
Unless this is going though some terminal server or multiplexer or
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
starts. */
-serial_t remote_desc = NULL;
+static serial_t remote_desc = NULL;
/* Having this larger than 400 causes us to be incompatible with m68k-stub.c
and i386-stub.c. Normally, no one would notice because it only matters
#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;
+
+/* This is the size (in chars) of the first response to the `g' command. This
+ is used to limit the size of the memory read and write commands to prevent
+ stub buffers from overflowing. The size does not include headers and
+ trailers, it is only the payload size. */
+
+static int remote_register_buf_size = 0;
+
/* 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;
+/* These are pointers to hook functions that may be set in order to
+ modify resume/wait behavior for a particular architecture. */
+
+void (*target_resume_hook) PARAMS ((void));
+void (*target_wait_loop_hook) PARAMS ((void));
+
\f
/* These are the threads which we last sent to the remote system. -1 for all
or -2 for not sent yet. */
static void
get_offsets ()
{
- char buf[PBUFSIZ];
- int nvals;
+ char buf[PBUFSIZ], *ptr;
+ int lose;
CORE_ADDR text_addr, data_addr, bss_addr;
struct section_offsets *offs;
return;
}
- nvals = sscanf (buf, "Text=%lx;Data=%lx;Bss=%lx", &text_addr, &data_addr,
- &bss_addr);
- if (nvals != 3)
+ /* Pick up each field in turn. This used to be done with scanf, but
+ scanf will make trouble if CORE_ADDR size doesn't match
+ conversion directives correctly. The following code will work
+ with any size of CORE_ADDR. */
+ text_addr = data_addr = bss_addr = 0;
+ ptr = buf;
+ lose = 0;
+
+ if (strncmp (ptr, "Text=", 5) == 0)
+ {
+ ptr += 5;
+ /* Don't use strtol, could lose on big values. */
+ while (*ptr && *ptr != ';')
+ text_addr = (text_addr << 4) + fromhex (*ptr++);
+ }
+ else
+ lose = 1;
+
+ if (!lose && strncmp (ptr, ";Data=", 6) == 0)
+ {
+ ptr += 6;
+ while (*ptr && *ptr != ';')
+ data_addr = (data_addr << 4) + fromhex (*ptr++);
+ }
+ else
+ lose = 1;
+
+ if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
+ {
+ ptr += 5;
+ while (*ptr && *ptr != ';')
+ bss_addr = (bss_addr << 4) + fromhex (*ptr++);
+ }
+ else
+ lose = 1;
+
+ if (lose)
error ("Malformed response to offset query, %s", buf);
if (symfile_objfile == NULL)
char *name;
int from_tty;
{
- remote_open_1 (name, from_tty, &remote_ops);
+ remote_open_1 (name, from_tty, &remote_ops, 0);
}
/* 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)
char *name;
int from_tty;
{
- char buf[PBUFSIZ];
-
- /* Do the basic remote open stuff. */
- remote_open_1 (name, from_tty, &extended_remote_ops);
-
- /* Now tell the remote that we're using the extended protocol. */
- putpkt ("!");
- getpkt (buf, 0);
-
+ remote_open_1 (name, from_tty, &extended_remote_ops, 1/*extended_p*/);
}
/* Generic code for opening a connection to a remote target. */
static DCACHE *remote_dcache;
static void
-remote_open_1 (name, from_tty, target)
+remote_open_1 (name, from_tty, target, extended_p)
char *name;
int from_tty;
struct target_ops *target;
+ int extended_p;
{
if (name == 0)
error ("To open a remote debug connection, you need to specify what serial\n\
if (!catch_errors (remote_start_remote, (char *)0,
"Couldn't establish connection to remote target\n", RETURN_MASK_ALL))
pop_target();
+
+
+ if (extended_p)
+ {
+ /* tell the remote that we're using the extended protocol. */
+ char buf[PBUFSIZ];
+ putpkt ("!");
+ getpkt (buf, 0);
+ }
}
-/* 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");
/* Convert hex digit A to a number. */
-static int
+int
fromhex (a)
int a;
{
return a - '0';
else if (a >= 'a' && a <= 'f')
return a - 'a' + 10;
- else
+ else if (a >= 'A' && a <= 'F')
+ return a - 'A' + 10;
+ else
error ("Reply contains invalid hex digit %d", a);
}
last_sent_signal = siggnal;
last_sent_step = step;
+ /* A hook for when we need to do something at the last moment before
+ resumption. */
+ if (target_resume_hook)
+ (*target_resume_hook) ();
+
if (siggnal != TARGET_SIGNAL_0)
{
buf[0] = step ? 'S' : 'C';
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)();
/* If nonzero, ignore the next kill. */
int kill_kludge;
+void
+remote_console_output (msg)
+ char *msg;
+{
+ char *p;
+
+ for (p = msg; *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);
+ }
+}
+
/* Wait until the remote machine stops, then return,
storing status in STATUS just as `wait' would.
Returns "pid" (though it's not clear what, if anything, that
getpkt ((char *) buf, 1);
signal (SIGINT, ofunc);
+ /* This is a hook for when we need to do something (perhaps the
+ collection of trace data) every time the target stops. */
+ if (target_wait_loop_hook)
+ (*target_wait_loop_hook) ();
+
switch (buf[0])
{
case 'E': /* Error of some sort */
n... = register number
r... = register contents
*/
-
p = &buf[3]; /* after Txx */
while (*p)
{
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 */
- 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);
- }
+ remote_console_output (buf + 1);
continue;
case '\0':
if (last_sent_signal != TARGET_SIGNAL_0)
sprintf (buf, "g");
remote_send (buf);
+ if (remote_register_buf_size == 0)
+ remote_register_buf_size = strlen (buf);
+
/* Unimplemented registers read as all bits zero. */
memset (regs, 0, REGISTER_BYTES);
#endif /* 0 (unused?) */
\f
+
+/* Return the number of hex digits in num. */
+
+static int
+hexnumlen (num)
+ ULONGEST num;
+{
+ int i;
+
+ for (i = 0; num != 0; i++)
+ num >>= 4;
+
+ return max (i, 1);
+}
+
/* Write memory data directly to the remote machine.
This does not inform the data cache; the data cache uses this.
MEMADDR is the address in the remote memory space.
char *myaddr;
int len;
{
- char buf[PBUFSIZ];
- int i;
- char *p;
+ int max_buf_size; /* Max size of packet output buffer */
+ int origlen;
- /* 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);
+ /* Chop the transfer down if necessary */
- /* We send target system values byte by byte, in increasing byte addresses,
- each byte encoded as two hex characters. */
+ max_buf_size = min (remote_write_size, PBUFSIZ);
+ if (remote_register_buf_size != 0)
+ max_buf_size = min (max_buf_size, remote_register_buf_size);
- p = buf + strlen (buf);
- for (i = 0; i < len; i++)
+ /* Subtract header overhead from max payload size - $M<memaddr>,<len>:#nn */
+ max_buf_size -= 2 + hexnumlen (memaddr + len - 1) + 1 + hexnumlen (len) + 4;
+
+ origlen = len;
+ while (len > 0)
{
- *p++ = tohex ((myaddr[i] >> 4) & 0xf);
- *p++ = tohex (myaddr[i] & 0xf);
- }
- *p = '\0';
+ char buf[PBUFSIZ];
+ char *p;
+ int todo;
+ int i;
- putpkt (buf);
- getpkt (buf, 0);
+ todo = min (len, max_buf_size / 2); /* num bytes that will fit */
- 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;
+ /* 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, todo);
+
+ /* We send target system values byte by byte, in increasing byte addresses,
+ each byte encoded as two hex characters. */
+
+ p = buf + strlen (buf);
+ for (i = 0; i < todo; i++)
+ {
+ *p++ = tohex ((myaddr[i] >> 4) & 0xf);
+ *p++ = tohex (myaddr[i] & 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;
+ }
+ myaddr += todo;
+ memaddr += todo;
+ len -= todo;
}
- return len;
+ return origlen;
}
/* Read memory data directly from the remote machine.
char *myaddr;
int len;
{
- char buf[PBUFSIZ];
- int i;
- char *p;
+ int max_buf_size; /* Max size of packet output buffer */
+ int origlen;
- if (len > PBUFSIZ / 2 - 1)
- abort ();
+ /* 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);
- putpkt (buf);
- getpkt (buf, 0);
+ max_buf_size = min (remote_write_size, PBUFSIZ);
+ if (remote_register_buf_size != 0)
+ max_buf_size = min (max_buf_size, remote_register_buf_size);
- if (buf[0] == 'E')
+ origlen = len;
+ while (len > 0)
{
- /* 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;
- }
+ char buf[PBUFSIZ];
+ char *p;
+ int todo;
+ int i;
+
+ todo = min (len, max_buf_size / 2); /* num bytes that will fit */
+
+ /* 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, 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 + (origlen - len);
+ myaddr[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
+ p += 2;
+ }
+ myaddr += todo;
+ memaddr += todo;
+ len -= todo;
}
- return i;
+ return origlen;
}
\f
/* Read or write LEN bytes from inferior memory at MEMADDR, transferring
int should_write;
struct target_ops *target; /* ignored */
{
+#ifdef REMOTE_TRANSLATE_XFER_ADDRESS
+ CORE_ADDR targaddr;
+ int targlen;
+ REMOTE_TRANSLATE_XFER_ADDRESS (memaddr, len, targaddr, targlen);
+ if (targlen == 0)
+ return 0;
+ memaddr = targaddr;
+ len = targlen;
+#endif
+
return dcache_xfer_memory (remote_dcache, memaddr, myaddr, len, should_write);
}
/* Send a packet to the remote machine, with error checking.
The data of the packet is in BUF. */
-static int
+int
putpkt (buf)
char *buf;
{
/* 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;
If FOREVER, wait forever rather than timing out; this is used
while the target is executing user code. */
-static void
+void
getpkt (buf, forever)
char *buf;
int forever;
if (val == 1)
{
if (remote_debug)
- fprintf_unfiltered (gdb_stderr, "Packet received: %s\n", buf);
+ fprintf_unfiltered (gdb_stdout, "Packet received: %s\n", buf);
SERIAL_WRITE (remote_desc, "+", 1);
return;
}
}
\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
+
+#ifdef REMOTE_BREAKPOINT
-#else /* No REMOTE_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
-/* Same old breakpoint instruction. This code does nothing different
- than mem-break.c. */
-static unsigned char break_insn[] = BREAKPOINT;
+static unsigned char big_break_insn[] = BIG_REMOTE_BREAKPOINT;
+static unsigned char little_break_insn[] = LITTLE_REMOTE_BREAKPOINT;
-#endif /* No 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 */
+}
+
+/* Some targets are only capable of doing downloads, and afterwards they switch
+ to the remote serial protocol. This function provides a clean way to get
+ from the download target to the remote target. It's basically just a
+ wrapper so that we don't have to expose any of the internal workings of
+ remote.c.
+
+ Prior to calling this routine, you should shutdown the current target code,
+ else you will get the "A program is being debugged already..." message.
+ Usually a call to pop_target() suffices.
+*/
+
+void
+push_remote_target (name, from_tty)
+ char *name;
+ int from_tty;
+{
+ printf_filtered ("Switching to remote protocol\n");
+ remote_open (name, from_tty);
+}
+
+/* Other targets want to use the entire remote serial module but with
+ certain remote_ops overridden. */
+
+void
+open_remote_target (name, from_tty, target, extended_p)
+ char *name;
+ int from_tty;
+ struct target_ops *target;
+ int extended_p;
+{
+ printf_filtered ("Selecting the %sremote protocol\n",
+ (extended_p ? "extended-" : ""));
+ remote_open_1 (name, from_tty, target, extended_p);
}
-\f
-/* Define the target subroutine names */
-struct target_ops remote_ops = {
- "remote", /* to_shortname */
- "Remote serial target in gdb-specific protocol", /* to_longname */
- "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
-Specify the serial device it is connected to (e.g. /dev/ttya).", /* to_doc */
- remote_open, /* to_open */
- remote_close, /* to_close */
- NULL, /* to_attach */
- remote_detach, /* to_detach */
- remote_resume, /* to_resume */
- remote_wait, /* to_wait */
- remote_fetch_registers, /* to_fetch_registers */
- remote_store_registers, /* to_store_registers */
- 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 */
- NULL, /* to_terminal_ours */
- NULL, /* to_terminal_info */
- remote_kill, /* to_kill */
- generic_load, /* to_load */
- NULL, /* to_lookup_symbol */
- NULL, /* to_create_inferior */
- remote_mourn, /* to_mourn_inferior */
- 0, /* to_can_run */
- 0, /* to_notice_signals */
- remote_thread_alive, /* to_thread_alive */
- 0, /* to_stop */
- process_stratum, /* to_stratum */
- NULL, /* to_next */
- 1, /* to_has_all_memory */
- 1, /* to_has_memory */
- 1, /* to_has_stack */
- 1, /* to_has_registers */
- 1, /* to_has_execution */
- NULL, /* sections */
- NULL, /* sections_end */
- OPS_MAGIC /* to_magic */
-};
-
-struct target_ops extended_remote_ops = {
- "extended-remote", /* to_shortname */
- "Extended remote serial target in gdb-specific protocol",/* to_longname */
- "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
-Specify the serial device it is connected to (e.g. /dev/ttya).", /* to_doc */
- extended_remote_open, /* to_open */
- remote_close, /* to_close */
- NULL, /* to_attach */
- remote_detach, /* to_detach */
- remote_resume, /* to_resume */
- remote_wait, /* to_wait */
- remote_fetch_registers, /* to_fetch_registers */
- remote_store_registers, /* to_store_registers */
- 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 */
- NULL, /* to_terminal_ours */
- NULL, /* to_terminal_info */
- remote_kill, /* to_kill */
- generic_load, /* to_load */
- NULL, /* to_lookup_symbol */
- extended_remote_create_inferior,/* to_create_inferior */
- extended_remote_mourn, /* to_mourn_inferior */
- 0, /* to_can_run */
- 0, /* to_notice_signals */
- remote_thread_alive, /* to_thread_alive */
- 0, /* to_stop */
- process_stratum, /* to_stratum */
- NULL, /* to_next */
- 1, /* to_has_all_memory */
- 1, /* to_has_memory */
- 1, /* to_has_stack */
- 1, /* to_has_registers */
- 1, /* to_has_execution */
- NULL, /* sections */
- NULL, /* sections_end */
- OPS_MAGIC /* to_magic */
-};
void
_initialize_remote ()
{
+ init_remote_ops() ;
+ init_extended__remote_ops() ;
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);
}