#include "remote-fileio.h"
#include "gdb/fileio.h"
+#include "gdb_stat.h"
#include "memory-map.h"
void _initialize_remote (void);
-/* Controls if async mode is permitted. */
-static int remote_async_permitted = 0;
-
-static int remote_async_permitted_set = 0;
-
-static void
-set_maintenance_remote_async_permitted (char *args, int from_tty,
- struct cmd_list_element *c)
-{
- if (target_has_execution)
- {
- remote_async_permitted_set = remote_async_permitted; /* revert */
- error (_("Cannot change this setting while the inferior is running."));
- }
-
- remote_async_permitted = remote_async_permitted_set;
-}
-
-static void
-show_maintenance_remote_async_permitted (struct ui_file *file, int from_tty,
- struct cmd_list_element *c, const char *value)
-{
- fprintf_filtered (file, _("\
-Controlling the remote inferior in asynchronous mode is %s.\n"),
- value);
-}
-
/* For "remote". */
static struct cmd_list_element *remote_cmdlist;
skip calling getpkt. This flag is set when BUF contains a
stop reply packet and the target is not waiting. */
int cached_wait_status;
+
+ /* True, if in no ack mode. That is, neither GDB nor the stub will
+ expect acks from each other. The connection is assumed to be
+ reliable. */
+ int noack_mode;
};
/* This data could be associated with a target, but we do not always
long regnum; /* GDB's internal register number. */
LONGEST pnum; /* Remote protocol register number. */
int in_g_packet; /* Always part of G packet. */
- /* long size in bytes; == register_size (current_gdbarch, regnum);
+ /* long size in bytes; == register_size (target_gdbarch, regnum);
at present. */
- /* char *name; == gdbarch_register_name (current_gdbarch, regnum);
+ /* char *name; == gdbarch_register_name (target_gdbarch, regnum);
at present. */
};
static struct remote_arch_state *
get_remote_arch_state (void)
{
- return gdbarch_data (current_gdbarch, remote_gdbarch_data_handle);
+ return gdbarch_data (target_gdbarch, remote_gdbarch_data_handle);
}
/* Fetch the global remote target state. */
static struct packet_reg *
packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum)
{
- if (regnum < 0 && regnum >= gdbarch_num_regs (current_gdbarch))
+ if (regnum < 0 && regnum >= gdbarch_num_regs (target_gdbarch))
return NULL;
else
{
packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum)
{
int i;
- for (i = 0; i < gdbarch_num_regs (current_gdbarch); i++)
+ for (i = 0; i < gdbarch_num_regs (target_gdbarch); i++)
{
struct packet_reg *r = &rsa->regs[i];
if (r->pnum == pnum)
PACKET_qSearch_memory,
PACKET_vAttach,
PACKET_vRun,
+ PACKET_QStartNoAckMode,
PACKET_MAX
};
internal_error (__FILE__, __LINE__,
_("remote_threads_extra_info"));
+ if (ptid_equal (tp->ptid, magic_null_ptid)
+ || (ptid_get_pid (tp->ptid) != 0 && ptid_get_tid (tp->ptid) == 0))
+ /* This is the main thread which was added by GDB. The remote
+ server doesn't know about it. */
+ return NULL;
+
if (use_threadextra_query)
{
xsnprintf (rs->buf, get_remote_packet_size (), "qThreadExtraInfo,%lx",
immediate_quit++; /* Allow user to interrupt it. */
- /* Ack any packet which the remote side has already sent. */
- serial_write (remote_desc, "+", 1);
-
/* Check whether the target is running now. */
putpkt ("?");
getpkt (&rs->buf, &rs->buf_size, 0);
/* If this is a function address, return the start of code
instead of any data function descriptor. */
- sym_addr = gdbarch_convert_from_func_ptr_addr (current_gdbarch,
+ sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch,
sym_addr,
¤t_target);
PACKET_qXfer_spu_write },
{ "QPassSignals", PACKET_DISABLE, remote_supported_packet,
PACKET_QPassSignals },
+ { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
+ PACKET_QStartNoAckMode },
};
static void
remote_open_1 (char *name, int from_tty, struct target_ops *target, int extended_p)
{
struct remote_state *rs = get_remote_state ();
+ struct packet_config *noack_config;
+
if (name == 0)
error (_("To open a remote debug connection, you need to specify what\n"
"serial device is attached to the remote system\n"
"(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
/* See FIXME above. */
- if (!remote_async_permitted)
+ if (!target_async_permitted)
wait_forever_enabled_p = 1;
/* If we're connected to a running target, target_preopen will kill it.
remote_query_supported or as they are needed. */
init_all_packet_configs ();
rs->explicit_packet_size = 0;
+ rs->noack_mode = 0;
general_thread = not_sent_ptid;
continue_thread = not_sent_ptid;
use_threadinfo_query = 1;
use_threadextra_query = 1;
+ /* Ack any packet which the remote side has already sent. */
+ serial_write (remote_desc, "+", 1);
+
/* The first packet we send to the target is the optional "supported
packets" request. If the target can answer this, it will tell us
which later probes to skip. */
remote_query_supported ();
+ /* Next, we possibly activate noack mode.
+
+ If the QStartNoAckMode packet configuration is set to AUTO,
+ enable noack mode if the stub reported a wish for it with
+ qSupported.
+
+ If set to TRUE, then enable noack mode even if the stub didn't
+ report it in qSupported. If the stub doesn't reply OK, the
+ session ends with an error.
+
+ If FALSE, then don't activate noack mode, regardless of what the
+ stub claimed should be the default with qSupported. */
+
+ noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
+
+ if (noack_config->detect == AUTO_BOOLEAN_TRUE
+ || (noack_config->detect == AUTO_BOOLEAN_AUTO
+ && noack_config->support == PACKET_ENABLE))
+ {
+ putpkt ("QStartNoAckMode");
+ getpkt (&rs->buf, &rs->buf_size, 0);
+ if (packet_ok (rs->buf, noack_config) == PACKET_OK)
+ rs->noack_mode = 1;
+ }
+
/* Next, if the target can specify a description, read it. We do
this before anything involving memory or registers. */
target_find_description ();
- if (remote_async_permitted)
+ if (target_async_permitted)
{
/* With this target we start out by owning the terminal. */
remote_async_terminal_ours_p = 1;
if (ex.reason < 0)
{
pop_target ();
- if (remote_async_permitted)
+ if (target_async_permitted)
wait_forever_enabled_p = 1;
throw_exception (ex);
}
}
- if (remote_async_permitted)
+ if (target_async_permitted)
wait_forever_enabled_p = 1;
if (extended_p)
static void
remote_terminal_inferior (void)
{
- if (!remote_async_permitted)
+ if (!target_async_permitted)
/* Nothing to do. */
return;
static void
remote_terminal_ours (void)
{
- if (!remote_async_permitted)
+ if (!target_async_permitted)
/* Nothing to do. */
return;
phex_nz (pnum, 0), p, buf);
fieldsize = hex2bin (p, regs,
- register_size (current_gdbarch,
+ register_size (target_gdbarch,
reg->regnum));
p += 2 * fieldsize;
- if (fieldsize < register_size (current_gdbarch,
+ if (fieldsize < register_size (target_gdbarch,
reg->regnum))
warning (_("Remote reply is too short: %s"), buf);
regcache_raw_supply (get_current_regcache (),
int address_size = remote_address_size;
/* If "remoteaddresssize" was not set, default to target address size. */
if (!address_size)
- address_size = gdbarch_addr_bit (current_gdbarch);
+ address_size = gdbarch_addr_bit (target_gdbarch);
if (address_size > 0
&& address_size < (sizeof (ULONGEST) * 8))
if (serial_write (remote_desc, buf2, p - buf2))
perror_with_name (_("putpkt: write failed"));
+ /* If this is a no acks version of the remote protocol, send the
+ packet and move on. */
+ if (rs->noack_mode)
+ break;
+
/* Read until either a timeout occurs (-2) or '+' is read. */
while (1)
{
}
#endif
}
+ return 0;
}
/* Come here after finding the start of a frame when we expected an
long bc;
int c;
char *buf = *buf_p;
+ struct remote_state *rs = get_remote_state ();
csum = 0;
bc = 0;
return -1;
}
+ /* Don't recompute the checksum; with no ack packets we
+ don't have any way to indicate a packet retransmission
+ is necessary. */
+ if (rs->noack_mode)
+ return bc;
+
pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
if (csum == pktcsum)
return bc;
fputstrn_unfiltered (*buf, val, 0, gdb_stdlog);
fprintf_unfiltered (gdb_stdlog, "\n");
}
- serial_write (remote_desc, "+", 1);
+
+ /* Skip the ack char if we're in no-ack mode. */
+ if (!rs->noack_mode)
+ serial_write (remote_desc, "+", 1);
return val;
}
/* Try the whole thing again. */
retry:
- serial_write (remote_desc, "-", 1);
+ /* Skip the nack char if we're in no-ack mode. */
+ if (!rs->noack_mode)
+ serial_write (remote_desc, "-", 1);
}
/* We have tried hard enough, and just can't receive the packet.
Give up. */
printf_unfiltered (_("Ignoring packet error, continuing...\n"));
- serial_write (remote_desc, "+", 1);
+
+ /* Skip the ack char if we're in no-ack mode. */
+ if (!rs->noack_mode)
+ serial_write (remote_desc, "+", 1);
return -1;
}
\f
char *p;
int bpsize;
- gdbarch_breakpoint_from_pc
- (current_gdbarch, &addr, &bpsize);
+ gdbarch_breakpoint_from_pc (target_gdbarch, &addr, &bpsize);
rs = get_remote_state ();
p = rs->buf;
instruction, even though we aren't inserting one ourselves. */
gdbarch_breakpoint_from_pc
- (current_gdbarch, &bp_tgt->placed_address, &bp_tgt->placed_size);
+ (target_gdbarch, &bp_tgt->placed_address, &bp_tgt->placed_size);
if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
return -1;
remote_read_description (struct target_ops *target)
{
struct remote_g_packet_data *data
- = gdbarch_data (current_gdbarch, remote_g_packet_data_handle);
+ = gdbarch_data (target_gdbarch, remote_g_packet_data_handle);
if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
{
int ret, bytes_read;
char *attachment_tmp;
- if (remote_protocol_packets[which_packet].support == PACKET_DISABLE)
+ if (!remote_desc
+ || remote_protocol_packets[which_packet].support == PACKET_DISABLE)
{
*remote_errno = FILEIO_ENOSYS;
return -1;
remote_hostio_close (fd, &remote_errno);
}
+
+static void *
+remote_bfd_iovec_open (struct bfd *abfd, void *open_closure)
+{
+ const char *filename = bfd_get_filename (abfd);
+ int fd, remote_errno;
+ int *stream;
+
+ gdb_assert (remote_filename_p (filename));
+
+ fd = remote_hostio_open (filename + 7, FILEIO_O_RDONLY, 0, &remote_errno);
+ if (fd == -1)
+ {
+ errno = remote_fileio_errno_to_host (remote_errno);
+ bfd_set_error (bfd_error_system_call);
+ return NULL;
+ }
+
+ stream = xmalloc (sizeof (int));
+ *stream = fd;
+ return stream;
+}
+
+static int
+remote_bfd_iovec_close (struct bfd *abfd, void *stream)
+{
+ int fd = *(int *)stream;
+ int remote_errno;
+
+ xfree (stream);
+
+ /* Ignore errors on close; these may happen if the remote
+ connection was already torn down. */
+ remote_hostio_close (fd, &remote_errno);
+
+ return 1;
+}
+
+static file_ptr
+remote_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf,
+ file_ptr nbytes, file_ptr offset)
+{
+ int fd = *(int *)stream;
+ int remote_errno;
+ file_ptr pos, bytes;
+
+ pos = 0;
+ while (nbytes > pos)
+ {
+ bytes = remote_hostio_pread (fd, (char *)buf + pos, nbytes - pos,
+ offset + pos, &remote_errno);
+ if (bytes == 0)
+ /* Success, but no bytes, means end-of-file. */
+ break;
+ if (bytes == -1)
+ {
+ errno = remote_fileio_errno_to_host (remote_errno);
+ bfd_set_error (bfd_error_system_call);
+ return -1;
+ }
+
+ pos += bytes;
+ }
+
+ return pos;
+}
+
+static int
+remote_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb)
+{
+ /* FIXME: We should probably implement remote_hostio_stat. */
+ sb->st_size = INT_MAX;
+ return 0;
+}
+
+int
+remote_filename_p (const char *filename)
+{
+ return strncmp (filename, "remote:", 7) == 0;
+}
+
+bfd *
+remote_bfd_open (const char *remote_file, const char *target)
+{
+ return bfd_openr_iovec (remote_file, target,
+ remote_bfd_iovec_open, NULL,
+ remote_bfd_iovec_pread,
+ remote_bfd_iovec_close,
+ remote_bfd_iovec_stat);
+}
+
void
remote_file_put (const char *local_file, const char *remote_file, int from_tty)
{
static int
remote_can_async_p (void)
{
- if (!remote_async_permitted)
+ if (!target_async_permitted)
/* We only enable async when the user specifically asks for it. */
return 0;
static int
remote_is_async_p (void)
{
- if (!remote_async_permitted)
+ if (!target_async_permitted)
/* We only enable async when the user specifically asks for it. */
return 0;
add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
"vRun", "run", 0);
+ add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
+ "QStartNoAckMode", "noack", 0);
+
/* Keep the old ``set remote Z-packet ...'' working. Each individual
Z sub-packet has its own set and show commands, but users may
have sets to this variable in their .gdbinit files (or in their
Show the remote pathname for \"run\""), NULL, NULL, NULL,
&remote_set_cmdlist, &remote_show_cmdlist);
- add_setshow_boolean_cmd ("remote-async", class_maintenance,
- &remote_async_permitted_set, _("\
-Set whether gdb controls the remote inferior in asynchronous mode."), _("\
-Show whether gdb controls the remote inferior in asynchronous mode."), _("\
-Tells gdb whether to control the remote inferior in asynchronous mode."),
- set_maintenance_remote_async_permitted,
- show_maintenance_remote_async_permitted,
- &maintenance_set_cmdlist,
- &maintenance_show_cmdlist);
-
-
/* Eventually initialize fileio. See fileio.c */
initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
projects / deliverable / binutils-gdb.git / blobdiff