/* Remote utility routines for the remote server for GDB.
- Copyright (C) 1986, 1989, 1993 Free Software Foundation, Inc.
+ Copyright (C) 1986-2015 Free Software Foundation, Inc.
-This file is part of GDB.
+ 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 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 3 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.
+ 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. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "server.h"
#include "terminal.h"
-#include <stdio.h>
-#include <string.h>
+#include "target.h"
+#include "gdbthread.h"
+#include "tdesc.h"
+#include "dll.h"
+#include "rsp-low.h"
+#include <ctype.h>
+#if HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
+#endif
+#if HAVE_SYS_FILE_H
#include <sys/file.h>
+#endif
+#if HAVE_NETINET_IN_H
#include <netinet/in.h>
+#endif
+#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
+#endif
+#if HAVE_NETDB_H
#include <netdb.h>
+#endif
+#if HAVE_NETINET_TCP_H
#include <netinet/tcp.h>
+#endif
+#if HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
+#endif
+#if HAVE_SIGNAL_H
#include <signal.h>
+#endif
+#if HAVE_FCNTL_H
#include <fcntl.h>
+#endif
+#include "gdb_sys_time.h"
+#include <unistd.h>
+#if HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#include <sys/stat.h>
+
+#if USE_WIN32API
+#include <winsock2.h>
+#endif
+
+#if __QNX__
+#include <sys/iomgr.h>
+#endif /* __QNX__ */
+
+#ifndef HAVE_SOCKLEN_T
+typedef int socklen_t;
+#endif
+
+#ifndef IN_PROCESS_AGENT
+
+#if USE_WIN32API
+# define INVALID_DESCRIPTOR INVALID_SOCKET
+#else
+# define INVALID_DESCRIPTOR -1
+#endif
+
+/* Extra value for readchar_callback. */
+enum {
+ /* The callback is currently not scheduled. */
+ NOT_SCHEDULED = -1
+};
+
+/* Status of the readchar callback.
+ Either NOT_SCHEDULED or the callback id. */
+static int readchar_callback = NOT_SCHEDULED;
+
+static int readchar (void);
+static void reset_readchar (void);
+static void reschedule (void);
+
+/* A cache entry for a successfully looked-up symbol. */
+struct sym_cache
+{
+ char *name;
+ CORE_ADDR addr;
+ struct sym_cache *next;
+};
int remote_debug = 0;
+struct ui_file *gdb_stdlog;
+
+static int remote_is_stdio = 0;
+
+static gdb_fildes_t remote_desc = INVALID_DESCRIPTOR;
+static gdb_fildes_t listen_desc = INVALID_DESCRIPTOR;
+
+/* FIXME headerize? */
+extern int using_threads;
+extern int debug_threads;
+
+/* If true, then GDB has requested noack mode. */
+int noack_mode = 0;
+/* If true, then we tell GDB to use noack mode by default. */
+int transport_is_reliable = 0;
+
+#ifdef USE_WIN32API
+# define read(fd, buf, len) recv (fd, (char *) buf, len, 0)
+# define write(fd, buf, len) send (fd, (char *) buf, len, 0)
+#endif
+
+int
+gdb_connected (void)
+{
+ return remote_desc != INVALID_DESCRIPTOR;
+}
+
+/* Return true if the remote connection is over stdio. */
+
+int
+remote_connection_is_stdio (void)
+{
+ return remote_is_stdio;
+}
+
+static void
+enable_async_notification (int fd)
+{
+#if defined(F_SETFL) && defined (FASYNC)
+ int save_fcntl_flags;
+
+ save_fcntl_flags = fcntl (fd, F_GETFL, 0);
+ fcntl (fd, F_SETFL, save_fcntl_flags | FASYNC);
+#if defined (F_SETOWN)
+ fcntl (fd, F_SETOWN, getpid ());
+#endif
+#endif
+}
+
+static int
+handle_accept_event (int err, gdb_client_data client_data)
+{
+ struct sockaddr_in sockaddr;
+ socklen_t tmp;
+
+ if (debug_threads)
+ debug_printf ("handling possible accept event\n");
+
+ tmp = sizeof (sockaddr);
+ remote_desc = accept (listen_desc, (struct sockaddr *) &sockaddr, &tmp);
+ if (remote_desc == -1)
+ perror_with_name ("Accept failed");
+
+ /* Enable TCP keep alive process. */
+ tmp = 1;
+ setsockopt (remote_desc, SOL_SOCKET, SO_KEEPALIVE,
+ (char *) &tmp, sizeof (tmp));
+
+ /* Tell TCP not to delay small packets. This greatly speeds up
+ interactive response. */
+ tmp = 1;
+ setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY,
+ (char *) &tmp, sizeof (tmp));
+
+#ifndef USE_WIN32API
+ signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply
+ exits when the remote side dies. */
+#endif
+
+ if (run_once)
+ {
+#ifndef USE_WIN32API
+ close (listen_desc); /* No longer need this */
+#else
+ closesocket (listen_desc); /* No longer need this */
+#endif
+ }
+
+ /* Even if !RUN_ONCE no longer notice new connections. Still keep the
+ descriptor open for add_file_handler to wait for a new connection. */
+ delete_file_handler (listen_desc);
+
+ /* Convert IP address to string. */
+ fprintf (stderr, "Remote debugging from host %s\n",
+ inet_ntoa (sockaddr.sin_addr));
-static int remote_desc;
+ enable_async_notification (remote_desc);
+
+ /* Register the event loop handler. */
+ add_file_handler (remote_desc, handle_serial_event, NULL);
+
+ /* We have a new GDB connection now. If we were disconnected
+ tracing, there's a window where the target could report a stop
+ event to the event loop, and since we have a connection now, we'd
+ try to send vStopped notifications to GDB. But, don't do that
+ until GDB as selected all-stop/non-stop, and has queried the
+ threads' status ('?'). */
+ target_async (0);
+
+ return 0;
+}
+
+/* Prepare for a later connection to a remote debugger.
+ NAME is the filename used for communication. */
+
+void
+remote_prepare (char *name)
+{
+ char *port_str;
+#ifdef USE_WIN32API
+ static int winsock_initialized;
+#endif
+ int port;
+ struct sockaddr_in sockaddr;
+ socklen_t tmp;
+ char *port_end;
+
+ remote_is_stdio = 0;
+ if (strcmp (name, STDIO_CONNECTION_NAME) == 0)
+ {
+ /* We need to record fact that we're using stdio sooner than the
+ call to remote_open so start_inferior knows the connection is
+ via stdio. */
+ remote_is_stdio = 1;
+ transport_is_reliable = 1;
+ return;
+ }
+
+ port_str = strchr (name, ':');
+ if (port_str == NULL)
+ {
+ transport_is_reliable = 0;
+ return;
+ }
+
+ port = strtoul (port_str + 1, &port_end, 10);
+ if (port_str[1] == '\0' || *port_end != '\0')
+ error ("Bad port argument: %s", name);
+
+#ifdef USE_WIN32API
+ if (!winsock_initialized)
+ {
+ WSADATA wsad;
+
+ WSAStartup (MAKEWORD (1, 0), &wsad);
+ winsock_initialized = 1;
+ }
+#endif
+
+ listen_desc = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
+ if (listen_desc == -1)
+ perror_with_name ("Can't open socket");
+
+ /* Allow rapid reuse of this port. */
+ tmp = 1;
+ setsockopt (listen_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp,
+ sizeof (tmp));
+
+ sockaddr.sin_family = PF_INET;
+ sockaddr.sin_port = htons (port);
+ sockaddr.sin_addr.s_addr = INADDR_ANY;
+
+ if (bind (listen_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr))
+ || listen (listen_desc, 1))
+ perror_with_name ("Can't bind address");
+
+ transport_is_reliable = 1;
+}
/* Open a connection to a remote debugger.
NAME is the filename used for communication. */
void
-remote_open (name)
- char *name;
+remote_open (char *name)
{
- int save_fcntl_flags;
+ char *port_str;
+
+ port_str = strchr (name, ':');
+#ifdef USE_WIN32API
+ if (port_str == NULL)
+ error ("Only <host>:<port> is supported on this platform.");
+#endif
+
+ if (strcmp (name, STDIO_CONNECTION_NAME) == 0)
+ {
+ fprintf (stderr, "Remote debugging using stdio\n");
+
+ /* Use stdin as the handle of the connection.
+ We only select on reads, for example. */
+ remote_desc = fileno (stdin);
- if (!strchr (name, ':'))
+ enable_async_notification (remote_desc);
+
+ /* Register the event loop handler. */
+ add_file_handler (remote_desc, handle_serial_event, NULL);
+ }
+#ifndef USE_WIN32API
+ else if (port_str == NULL)
{
- remote_desc = open (name, O_RDWR);
+ struct stat statbuf;
+
+ if (stat (name, &statbuf) == 0
+ && (S_ISCHR (statbuf.st_mode) || S_ISFIFO (statbuf.st_mode)))
+ remote_desc = open (name, O_RDWR);
+ else
+ {
+ errno = EINVAL;
+ remote_desc = -1;
+ }
+
if (remote_desc < 0)
perror_with_name ("Could not open remote device");
#ifdef HAVE_TERMIOS
{
struct termios termios;
- tcgetattr(remote_desc, &termios);
+ tcgetattr (remote_desc, &termios);
termios.c_iflag = 0;
termios.c_oflag = 0;
termios.c_lflag = 0;
- termios.c_cflag &= ~(CSIZE|PARENB);
+ termios.c_cflag &= ~(CSIZE | PARENB);
termios.c_cflag |= CLOCAL | CS8;
- termios.c_cc[VMIN] = 0;
+ termios.c_cc[VMIN] = 1;
termios.c_cc[VTIME] = 0;
- tcsetattr(remote_desc, TCSANOW, &termios);
+ tcsetattr (remote_desc, TCSANOW, &termios);
}
#endif
termio.c_iflag = 0;
termio.c_oflag = 0;
termio.c_lflag = 0;
- termio.c_cflag &= ~(CSIZE|PARENB);
+ termio.c_cflag &= ~(CSIZE | PARENB);
termio.c_cflag |= CLOCAL | CS8;
- termio.c_cc[VMIN] = 0;
+ termio.c_cc[VMIN] = 1;
termio.c_cc[VTIME] = 0;
ioctl (remote_desc, TCSETA, &termio);
}
#endif
+ fprintf (stderr, "Remote debugging using %s\n", name);
+ enable_async_notification (remote_desc);
+
+ /* Register the event loop handler. */
+ add_file_handler (remote_desc, handle_serial_event, NULL);
}
+#endif /* USE_WIN32API */
else
{
- char *port_str;
int port;
+ socklen_t len;
struct sockaddr_in sockaddr;
- int tmp;
- struct protoent *protoent;
- int tmp_desc;
- port_str = strchr (name, ':');
+ len = sizeof (sockaddr);
+ if (getsockname (listen_desc,
+ (struct sockaddr *) &sockaddr, &len) < 0
+ || len < sizeof (sockaddr))
+ perror_with_name ("Can't determine port");
+ port = ntohs (sockaddr.sin_port);
- port = atoi (port_str + 1);
+ fprintf (stderr, "Listening on port %d\n", port);
+ fflush (stderr);
- tmp_desc = socket (PF_INET, SOCK_STREAM, 0);
- if (tmp_desc < 0)
- perror_with_name ("Can't open socket");
+ /* Register the event loop handler. */
+ add_file_handler (listen_desc, handle_accept_event, NULL);
+ }
+}
- /* Allow rapid reuse of this port. */
- tmp = 1;
- setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *)&tmp,
- sizeof(tmp));
+void
+remote_close (void)
+{
+ delete_file_handler (remote_desc);
- sockaddr.sin_family = PF_INET;
- sockaddr.sin_port = htons(port);
- sockaddr.sin_addr.s_addr = INADDR_ANY;
+#ifdef USE_WIN32API
+ closesocket (remote_desc);
+#else
+ if (! remote_connection_is_stdio ())
+ close (remote_desc);
+#endif
+ remote_desc = INVALID_DESCRIPTOR;
- if (bind (tmp_desc, (struct sockaddr *)&sockaddr, sizeof (sockaddr))
- || listen (tmp_desc, 1))
- perror_with_name ("Can't bind address");
+ reset_readchar ();
+}
- tmp = sizeof (sockaddr);
- remote_desc = accept (tmp_desc, (struct sockaddr *)&sockaddr, &tmp);
- if (remote_desc == -1)
- perror_with_name ("Accept failed");
+#endif
- protoent = getprotobyname ("tcp");
- if (!protoent)
- perror_with_name ("getprotobyname");
+#ifndef IN_PROCESS_AGENT
- /* Enable TCP keep alive process. */
- tmp = 1;
- setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *)&tmp, sizeof(tmp));
+void
+decode_address (CORE_ADDR *addrp, const char *start, int len)
+{
+ CORE_ADDR addr;
+ char ch;
+ int i;
- /* Tell TCP not to delay small packets. This greatly speeds up
- interactive response. */
- tmp = 1;
- setsockopt (remote_desc, protoent->p_proto, TCP_NODELAY,
- (char *)&tmp, sizeof(tmp));
+ addr = 0;
+ for (i = 0; i < len; i++)
+ {
+ ch = start[i];
+ addr = addr << 4;
+ addr = addr | (fromhex (ch) & 0x0f);
+ }
+ *addrp = addr;
+}
+
+const char *
+decode_address_to_semicolon (CORE_ADDR *addrp, const char *start)
+{
+ const char *end;
+
+ end = start;
+ while (*end != '\0' && *end != ';')
+ end++;
+
+ decode_address (addrp, start, end - start);
+
+ if (*end == ';')
+ end++;
+ return end;
+}
+
+#endif
+
+#ifndef IN_PROCESS_AGENT
+
+/* Look for a sequence of characters which can be run-length encoded.
+ If there are any, update *CSUM and *P. Otherwise, output the
+ single character. Return the number of characters consumed. */
+
+static int
+try_rle (char *buf, int remaining, unsigned char *csum, char **p)
+{
+ int n;
+
+ /* Always output the character. */
+ *csum += buf[0];
+ *(*p)++ = buf[0];
- close (tmp_desc); /* No longer need this */
+ /* Don't go past '~'. */
+ if (remaining > 97)
+ remaining = 97;
- signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply
- exits when the remote side dies. */
+ for (n = 1; n < remaining; n++)
+ if (buf[n] != buf[0])
+ break;
+
+ /* N is the index of the first character not the same as buf[0].
+ buf[0] is counted twice, so by decrementing N, we get the number
+ of characters the RLE sequence will replace. */
+ n--;
+
+ if (n < 3)
+ return 1;
+
+ /* Skip the frame characters. The manual says to skip '+' and '-'
+ also, but there's no reason to. Unfortunately these two unusable
+ characters double the encoded length of a four byte zero
+ value. */
+ while (n + 29 == '$' || n + 29 == '#')
+ n--;
+
+ *csum += '*';
+ *(*p)++ = '*';
+ *csum += n + 29;
+ *(*p)++ = n + 29;
+
+ return n + 1;
+}
+
+#endif
+
+#ifndef IN_PROCESS_AGENT
+
+/* Write a PTID to BUF. Returns BUF+CHARACTERS_WRITTEN. */
+
+char *
+write_ptid (char *buf, ptid_t ptid)
+{
+ int pid, tid;
+
+ if (multi_process)
+ {
+ pid = ptid_get_pid (ptid);
+ if (pid < 0)
+ buf += sprintf (buf, "p-%x.", -pid);
+ else
+ buf += sprintf (buf, "p%x.", pid);
}
+ tid = ptid_get_lwp (ptid);
+ if (tid < 0)
+ buf += sprintf (buf, "-%x", -tid);
+ else
+ buf += sprintf (buf, "%x", tid);
-#if defined(F_SETFL) && defined (FASYNC)
- save_fcntl_flags = fcntl (remote_desc, F_GETFL, 0);
- fcntl (remote_desc, F_SETFL, save_fcntl_flags | FASYNC);
- disable_async_io ();
-#endif /* FASYNC */
- fprintf (stderr, "Remote debugging using %s\n", name);
+ return buf;
}
-void
-remote_close()
+ULONGEST
+hex_or_minus_one (char *buf, char **obuf)
+{
+ ULONGEST ret;
+
+ if (startswith (buf, "-1"))
+ {
+ ret = (ULONGEST) -1;
+ buf += 2;
+ }
+ else
+ buf = unpack_varlen_hex (buf, &ret);
+
+ if (obuf)
+ *obuf = buf;
+
+ return ret;
+}
+
+/* Extract a PTID from BUF. If non-null, OBUF is set to the to one
+ passed the last parsed char. Returns null_ptid on error. */
+ptid_t
+read_ptid (char *buf, char **obuf)
{
- close (remote_desc);
+ char *p = buf;
+ char *pp;
+ ULONGEST pid = 0, tid = 0;
+
+ if (*p == 'p')
+ {
+ /* Multi-process ptid. */
+ pp = unpack_varlen_hex (p + 1, &pid);
+ if (*pp != '.')
+ error ("invalid remote ptid: %s\n", p);
+
+ p = pp + 1;
+
+ tid = hex_or_minus_one (p, &pp);
+
+ if (obuf)
+ *obuf = pp;
+ return ptid_build (pid, tid, 0);
+ }
+
+ /* No multi-process. Just a tid. */
+ tid = hex_or_minus_one (p, &pp);
+
+ /* Since GDB is not sending a process id (multi-process extensions
+ are off), then there's only one process. Default to the first in
+ the list. */
+ pid = pid_of (get_first_process ());
+
+ if (obuf)
+ *obuf = pp;
+ return ptid_build (pid, tid, 0);
}
-/* Convert hex digit A to a number. */
+/* Write COUNT bytes in BUF to the client.
+ The result is the number of bytes written or -1 if error.
+ This may return less than COUNT. */
static int
-fromhex (a)
- int a;
+write_prim (const void *buf, int count)
{
- if (a >= '0' && a <= '9')
- return a - '0';
- else if (a >= 'a' && a <= 'f')
- return a - 'a' + 10;
+ if (remote_connection_is_stdio ())
+ return write (fileno (stdout), buf, count);
else
- error ("Reply contains invalid hex digit");
+ return write (remote_desc, buf, count);
}
-/* Convert number NIB to a hex digit. */
+/* Read COUNT bytes from the client and store in BUF.
+ The result is the number of bytes read or -1 if error.
+ This may return less than COUNT. */
static int
-tohex (nib)
- int nib;
+read_prim (void *buf, int count)
{
- if (nib < 10)
- return '0' + nib;
+ if (remote_connection_is_stdio ())
+ return read (fileno (stdin), buf, count);
else
- return 'a' + nib - 10;
+ return read (remote_desc, buf, count);
}
/* Send a packet to the remote machine, with error checking.
- The data of the packet is in BUF. Returns >= 0 on success, -1 otherwise. */
+ The data of the packet is in BUF, and the length of the
+ packet is in CNT. Returns >= 0 on success, -1 otherwise. */
-int
-putpkt (buf)
- char *buf;
+static int
+putpkt_binary_1 (char *buf, int cnt, int is_notif)
{
int i;
unsigned char csum = 0;
- char buf2[2000];
- char buf3[1];
- int cnt = strlen (buf);
+ char *buf2;
char *p;
+ int cc;
+
+ buf2 = (char *) xmalloc (strlen ("$") + cnt + strlen ("#nn") + 1);
/* Copy the packet into buffer BUF2, encapsulating it
and giving it a checksum. */
p = buf2;
- *p++ = '$';
+ if (is_notif)
+ *p++ = '%';
+ else
+ *p++ = '$';
+
+ for (i = 0; i < cnt;)
+ i += try_rle (buf + i, cnt - i, &csum, &p);
- for (i = 0; i < cnt; i++)
- {
- csum += buf[i];
- *p++ = buf[i];
- }
*p++ = '#';
*p++ = tohex ((csum >> 4) & 0xf);
*p++ = tohex (csum & 0xf);
do
{
- int cc;
-
- if (write (remote_desc, buf2, p - buf2) != p - buf2)
+ if (write_prim (buf2, p - buf2) != p - buf2)
{
perror ("putpkt(write)");
+ free (buf2);
return -1;
}
+ if (noack_mode || is_notif)
+ {
+ /* Don't expect an ack then. */
+ if (remote_debug)
+ {
+ if (is_notif)
+ fprintf (stderr, "putpkt (\"%s\"); [notif]\n", buf2);
+ else
+ fprintf (stderr, "putpkt (\"%s\"); [noack mode]\n", buf2);
+ fflush (stderr);
+ }
+ break;
+ }
+
if (remote_debug)
- printf ("putpkt (\"%s\"); [looking for ack]\n", buf2);
- cc = read (remote_desc, buf3, 1);
- if (remote_debug)
- printf ("[received '%c' (0x%x)]\n", buf3[0], buf3[0]);
- if (cc <= 0)
{
- if (cc == 0)
- fprintf (stderr, "putpkt(read): Got EOF\n");
- else
- perror ("putpkt(read)");
+ fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2);
+ fflush (stderr);
+ }
+
+ cc = readchar ();
+ if (cc < 0)
+ {
+ free (buf2);
return -1;
}
+
+ if (remote_debug)
+ {
+ fprintf (stderr, "[received '%c' (0x%x)]\n", cc, cc);
+ fflush (stderr);
+ }
+
+ /* Check for an input interrupt while we're here. */
+ if (cc == '\003' && current_thread != NULL)
+ (*the_target->request_interrupt) ();
}
- while (buf3[0] != '+');
+ while (cc != '+');
+ free (buf2);
return 1; /* Success! */
}
+int
+putpkt_binary (char *buf, int cnt)
+{
+ return putpkt_binary_1 (buf, cnt, 0);
+}
+
+/* Send a packet to the remote machine, with error checking. The data
+ of the packet is in BUF, and the packet should be a NUL-terminated
+ string. Returns >= 0 on success, -1 otherwise. */
+
+int
+putpkt (char *buf)
+{
+ return putpkt_binary (buf, strlen (buf));
+}
+
+int
+putpkt_notif (char *buf)
+{
+ return putpkt_binary_1 (buf, strlen (buf), 1);
+}
+
/* Come here when we get an input interrupt from the remote side. This
interrupt should only be active while we are waiting for the child to do
- something. About the only thing that should come through is a ^C, which
- will cause us to send a SIGINT to the child. */
+ something. Thus this assumes readchar:bufcnt is 0.
+ About the only thing that should come through is a ^C, which
+ will cause us to request child interruption. */
static void
-input_interrupt()
+input_interrupt (int unused)
{
- int cc;
- char c;
+ fd_set readset;
+ struct timeval immediate = { 0, 0 };
- cc = read (remote_desc, &c, 1);
+ /* Protect against spurious interrupts. This has been observed to
+ be a problem under NetBSD 1.4 and 1.5. */
- if (cc != 1 || c != '\003')
+ FD_ZERO (&readset);
+ FD_SET (remote_desc, &readset);
+ if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0)
{
- fprintf(stderr, "input_interrupt, cc = %d c = %d\n", cc, c);
- return;
+ int cc;
+ char c = 0;
+
+ cc = read_prim (&c, 1);
+
+ if (cc == 0)
+ {
+ fprintf (stderr, "client connection closed\n");
+ return;
+ }
+ else if (cc != 1 || c != '\003')
+ {
+ fprintf (stderr, "input_interrupt, count = %d c = %d ", cc, c);
+ if (isprint (c))
+ fprintf (stderr, "('%c')\n", c);
+ else
+ fprintf (stderr, "('\\x%02x')\n", c & 0xff);
+ return;
+ }
+
+ (*the_target->request_interrupt) ();
}
+}
+
+/* Check if the remote side sent us an interrupt request (^C). */
+void
+check_remote_input_interrupt_request (void)
+{
+ /* This function may be called before establishing communications,
+ therefore we need to validate the remote descriptor. */
+
+ if (remote_desc == INVALID_DESCRIPTOR)
+ return;
+
+ input_interrupt (0);
+}
+
+/* Asynchronous I/O support. SIGIO must be enabled when waiting, in order to
+ accept Control-C from the client, and must be disabled when talking to
+ the client. */
+
+static void
+unblock_async_io (void)
+{
+#ifndef USE_WIN32API
+ sigset_t sigio_set;
- kill (inferior_pid, SIGINT);
+ sigemptyset (&sigio_set);
+ sigaddset (&sigio_set, SIGIO);
+ sigprocmask (SIG_UNBLOCK, &sigio_set, NULL);
+#endif
}
+#ifdef __QNX__
+static void
+nto_comctrl (int enable)
+{
+ struct sigevent event;
+
+ if (enable)
+ {
+ event.sigev_notify = SIGEV_SIGNAL_THREAD;
+ event.sigev_signo = SIGIO;
+ event.sigev_code = 0;
+ event.sigev_value.sival_ptr = NULL;
+ event.sigev_priority = -1;
+ ionotify (remote_desc, _NOTIFY_ACTION_POLLARM, _NOTIFY_COND_INPUT,
+ &event);
+ }
+ else
+ ionotify (remote_desc, _NOTIFY_ACTION_POLL, _NOTIFY_COND_INPUT, NULL);
+}
+#endif /* __QNX__ */
+
+
+/* Current state of asynchronous I/O. */
+static int async_io_enabled;
+
+/* Enable asynchronous I/O. */
void
-enable_async_io()
+enable_async_io (void)
{
+ if (async_io_enabled)
+ return;
+
+#ifndef USE_WIN32API
signal (SIGIO, input_interrupt);
+#endif
+ async_io_enabled = 1;
+#ifdef __QNX__
+ nto_comctrl (1);
+#endif /* __QNX__ */
}
+/* Disable asynchronous I/O. */
void
-disable_async_io()
+disable_async_io (void)
{
+ if (!async_io_enabled)
+ return;
+
+#ifndef USE_WIN32API
signal (SIGIO, SIG_IGN);
+#endif
+ async_io_enabled = 0;
+#ifdef __QNX__
+ nto_comctrl (0);
+#endif /* __QNX__ */
+
+}
+
+void
+initialize_async_io (void)
+{
+ /* Make sure that async I/O starts disabled. */
+ async_io_enabled = 1;
+ disable_async_io ();
+
+ /* Make sure the signal is unblocked. */
+ unblock_async_io ();
}
+/* Internal buffer used by readchar.
+ These are global to readchar because reschedule_remote needs to be
+ able to tell whether the buffer is empty. */
+
+static unsigned char readchar_buf[BUFSIZ];
+static int readchar_bufcnt = 0;
+static unsigned char *readchar_bufp;
+
/* Returns next char from remote GDB. -1 if error. */
static int
-readchar ()
+readchar (void)
{
- static char buf[BUFSIZ];
- static int bufcnt = 0;
- static char *bufp;
+ int ch;
- if (bufcnt-- > 0)
- return *bufp++ & 0x7f;
+ if (readchar_bufcnt == 0)
+ {
+ readchar_bufcnt = read_prim (readchar_buf, sizeof (readchar_buf));
- bufcnt = read (remote_desc, buf, sizeof (buf));
+ if (readchar_bufcnt <= 0)
+ {
+ if (readchar_bufcnt == 0)
+ {
+ if (remote_debug)
+ fprintf (stderr, "readchar: Got EOF\n");
+ }
+ else
+ perror ("readchar");
- if (bufcnt <= 0)
- {
- if (bufcnt == 0)
- fprintf (stderr, "readchar: Got EOF\n");
- else
- perror ("readchar");
+ return -1;
+ }
- return -1;
+ readchar_bufp = readchar_buf;
+ }
+
+ readchar_bufcnt--;
+ ch = *readchar_bufp++;
+ reschedule ();
+ return ch;
+}
+
+/* Reset the readchar state machine. */
+
+static void
+reset_readchar (void)
+{
+ readchar_bufcnt = 0;
+ if (readchar_callback != NOT_SCHEDULED)
+ {
+ delete_callback_event (readchar_callback);
+ readchar_callback = NOT_SCHEDULED;
}
+}
+
+/* Process remaining data in readchar_buf. */
+
+static int
+process_remaining (void *context)
+{
+ int res;
+
+ /* This is a one-shot event. */
+ readchar_callback = NOT_SCHEDULED;
+
+ if (readchar_bufcnt > 0)
+ res = handle_serial_event (0, NULL);
+ else
+ res = 0;
- bufp = buf;
- bufcnt--;
- return *bufp++ & 0x7f;
+ return res;
+}
+
+/* If there is still data in the buffer, queue another event to process it,
+ we can't sleep in select yet. */
+
+static void
+reschedule (void)
+{
+ if (readchar_bufcnt > 0 && readchar_callback == NOT_SCHEDULED)
+ readchar_callback = append_callback_event (process_remaining, NULL);
}
/* Read a packet from the remote machine, with error checking,
and store it in BUF. Returns length of packet, or negative if error. */
int
-getpkt (buf)
- char *buf;
+getpkt (char *buf)
{
char *bp;
unsigned char csum, c1, c2;
if (c == '$')
break;
if (remote_debug)
- printf ("[getpkt: discarding char '%c']\n", c);
+ {
+ fprintf (stderr, "[getpkt: discarding char '%c']\n", c);
+ fflush (stderr);
+ }
+
if (c < 0)
return -1;
}
c1 = fromhex (readchar ());
c2 = fromhex (readchar ());
-
+
if (csum == (c1 << 4) + c2)
break;
+ if (noack_mode)
+ {
+ fprintf (stderr,
+ "Bad checksum, sentsum=0x%x, csum=0x%x, "
+ "buf=%s [no-ack-mode, Bad medium?]\n",
+ (c1 << 4) + c2, csum, buf);
+ /* Not much we can do, GDB wasn't expecting an ack/nac. */
+ break;
+ }
+
fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n",
(c1 << 4) + c2, csum, buf);
- write (remote_desc, "-", 1);
+ if (write_prim ("-", 1) != 1)
+ return -1;
}
- if (remote_debug)
- printf ("getpkt (\"%s\"); [sending ack] \n", buf);
+ if (!noack_mode)
+ {
+ if (remote_debug)
+ {
+ fprintf (stderr, "getpkt (\"%s\"); [sending ack] \n", buf);
+ fflush (stderr);
+ }
- write (remote_desc, "+", 1);
+ if (write_prim ("+", 1) != 1)
+ return -1;
+
+ if (remote_debug)
+ {
+ fprintf (stderr, "[sent ack]\n");
+ fflush (stderr);
+ }
+ }
+ else
+ {
+ if (remote_debug)
+ {
+ fprintf (stderr, "getpkt (\"%s\"); [no ack sent] \n", buf);
+ fflush (stderr);
+ }
+ }
- if (remote_debug)
- printf ("[sent ack]\n");
return bp - buf;
}
void
-write_ok (buf)
- char *buf;
+write_ok (char *buf)
{
buf[0] = 'O';
buf[1] = 'K';
}
void
-write_enn (buf)
- char *buf;
+write_enn (char *buf)
{
+ /* Some day, we should define the meanings of the error codes... */
buf[0] = 'E';
- buf[1] = 'N';
- buf[2] = 'N';
+ buf[1] = '0';
+ buf[2] = '1';
buf[3] = '\0';
}
-void
-convert_int_to_ascii (from, to, n)
- char *from, *to;
- int n;
-{
- int nib;
- char ch;
- while (n--)
- {
- ch = *from++;
- nib = ((ch & 0xf0) >> 4) & 0x0f;
- *to++ = tohex (nib);
- nib = ch & 0x0f;
- *to++ = tohex (nib);
- }
- *to++ = 0;
-}
+#endif
-
-void
-convert_ascii_to_int (from, to, n)
- char *from, *to;
- int n;
-{
- int nib1, nib2;
- while (n--)
- {
- nib1 = fromhex (*from++);
- nib2 = fromhex (*from++);
- *to++ = (((nib1 & 0x0f) << 4) & 0xf0) | (nib2 & 0x0f);
- }
-}
+#ifndef IN_PROCESS_AGENT
static char *
-outreg(regno, buf)
- int regno;
- char *buf;
+outreg (struct regcache *regcache, int regno, char *buf)
{
- extern char registers[];
- int regsize = REGISTER_RAW_SIZE (regno);
-
- *buf++ = tohex (regno >> 4);
+ if ((regno >> 12) != 0)
+ *buf++ = tohex ((regno >> 12) & 0xf);
+ if ((regno >> 8) != 0)
+ *buf++ = tohex ((regno >> 8) & 0xf);
+ *buf++ = tohex ((regno >> 4) & 0xf);
*buf++ = tohex (regno & 0xf);
*buf++ = ':';
- convert_int_to_ascii (®isters[REGISTER_BYTE (regno)], buf, regsize);
- buf += 2 * regsize;
+ collect_register_as_string (regcache, regno, buf);
+ buf += 2 * register_size (regcache->tdesc, regno);
*buf++ = ';';
return buf;
}
void
-prepare_resume_reply (buf, status, signo)
- char *buf;
- char status;
- unsigned char signo;
+new_thread_notify (int id)
{
- int nib;
+ char own_buf[256];
- *buf++ = status;
+ /* The `n' response is not yet part of the remote protocol. Do nothing. */
+ if (1)
+ return;
- /* FIXME! Should be converting this signal number (numbered
- according to the signal numbering of the system we are running on)
- to the signal numbers used by the gdb protocol (see enum target_signal
- in gdb/target.h). */
- nib = ((signo & 0xf0) >> 4);
- *buf++ = tohex (nib);
- nib = signo & 0x0f;
- *buf++ = tohex (nib);
+ if (server_waiting == 0)
+ return;
- if (status == 'T')
- {
- buf = outreg (PC_REGNUM, buf);
- buf = outreg (FP_REGNUM, buf);
- buf = outreg (SP_REGNUM, buf);
-#ifdef NPC_REGNUM
- buf = outreg (NPC_REGNUM, buf);
-#endif
-#ifdef O7_REGNUM
- buf = outreg (O7_REGNUM, buf);
-#endif
+ sprintf (own_buf, "n%x", id);
+ disable_async_io ();
+ putpkt (own_buf);
+ enable_async_io ();
+}
- /* If the debugger hasn't used any thread features, don't burden it with
- threads. If we didn't check this, GDB 4.13 and older would choke. */
- if (cont_thread != 0)
- {
- if (old_thread_from_wait != thread_from_wait)
- {
- sprintf (buf, "thread:%x;", thread_from_wait);
- buf += strlen (buf);
- old_thread_from_wait = thread_from_wait;
- }
- }
+void
+dead_thread_notify (int id)
+{
+ char own_buf[256];
+
+ /* The `x' response is not yet part of the remote protocol. Do nothing. */
+ if (1)
+ return;
+
+ sprintf (own_buf, "x%x", id);
+ disable_async_io ();
+ putpkt (own_buf);
+ enable_async_io ();
+}
+
+void
+prepare_resume_reply (char *buf, ptid_t ptid,
+ struct target_waitstatus *status)
+{
+ if (debug_threads)
+ debug_printf ("Writing resume reply for %s:%d\n",
+ target_pid_to_str (ptid), status->kind);
+
+ switch (status->kind)
+ {
+ case TARGET_WAITKIND_STOPPED:
+ case TARGET_WAITKIND_FORKED:
+ case TARGET_WAITKIND_VFORKED:
+ case TARGET_WAITKIND_VFORK_DONE:
+ case TARGET_WAITKIND_EXECD:
+ case TARGET_WAITKIND_THREAD_CREATED:
+ {
+ struct thread_info *saved_thread;
+ const char **regp;
+ struct regcache *regcache;
+
+ if ((status->kind == TARGET_WAITKIND_FORKED && report_fork_events)
+ || (status->kind == TARGET_WAITKIND_VFORKED && report_vfork_events))
+ {
+ enum gdb_signal signal = GDB_SIGNAL_TRAP;
+ const char *event = (status->kind == TARGET_WAITKIND_FORKED
+ ? "fork" : "vfork");
+
+ sprintf (buf, "T%02x%s:", signal, event);
+ buf += strlen (buf);
+ buf = write_ptid (buf, status->value.related_pid);
+ strcat (buf, ";");
+ }
+ else if (status->kind == TARGET_WAITKIND_VFORK_DONE && report_vfork_events)
+ {
+ enum gdb_signal signal = GDB_SIGNAL_TRAP;
+
+ sprintf (buf, "T%02xvforkdone:;", signal);
+ }
+ else if (status->kind == TARGET_WAITKIND_EXECD && report_exec_events)
+ {
+ enum gdb_signal signal = GDB_SIGNAL_TRAP;
+ const char *event = "exec";
+ char hexified_pathname[PATH_MAX * 2];
+
+ sprintf (buf, "T%02x%s:", signal, event);
+ buf += strlen (buf);
+
+ /* Encode pathname to hexified format. */
+ bin2hex ((const gdb_byte *) status->value.execd_pathname,
+ hexified_pathname,
+ strlen (status->value.execd_pathname));
+
+ sprintf (buf, "%s;", hexified_pathname);
+ xfree (status->value.execd_pathname);
+ status->value.execd_pathname = NULL;
+ buf += strlen (buf);
+ }
+ else if (status->kind == TARGET_WAITKIND_THREAD_CREATED
+ && report_thread_events)
+ {
+ enum gdb_signal signal = GDB_SIGNAL_TRAP;
+
+ sprintf (buf, "T%02xcreate:;", signal);
+ }
+ else
+ sprintf (buf, "T%02x", status->value.sig);
+
+ buf += strlen (buf);
+
+ saved_thread = current_thread;
+
+ current_thread = find_thread_ptid (ptid);
+
+ regp = current_target_desc ()->expedite_regs;
+
+ regcache = get_thread_regcache (current_thread, 1);
+
+ if (the_target->stopped_by_watchpoint != NULL
+ && (*the_target->stopped_by_watchpoint) ())
+ {
+ CORE_ADDR addr;
+ int i;
+
+ strncpy (buf, "watch:", 6);
+ buf += 6;
+
+ addr = (*the_target->stopped_data_address) ();
+
+ /* Convert each byte of the address into two hexadecimal
+ chars. Note that we take sizeof (void *) instead of
+ sizeof (addr); this is to avoid sending a 64-bit
+ address to a 32-bit GDB. */
+ for (i = sizeof (void *) * 2; i > 0; i--)
+ *buf++ = tohex ((addr >> (i - 1) * 4) & 0xf);
+ *buf++ = ';';
+ }
+ else if (swbreak_feature && target_stopped_by_sw_breakpoint ())
+ {
+ sprintf (buf, "swbreak:;");
+ buf += strlen (buf);
+ }
+ else if (hwbreak_feature && target_stopped_by_hw_breakpoint ())
+ {
+ sprintf (buf, "hwbreak:;");
+ buf += strlen (buf);
+ }
+
+ while (*regp)
+ {
+ buf = outreg (regcache, find_regno (regcache->tdesc, *regp), buf);
+ regp ++;
+ }
+ *buf = '\0';
+
+ /* Formerly, if the debugger had not used any thread features
+ we would not burden it with a thread status response. This
+ was for the benefit of GDB 4.13 and older. However, in
+ recent GDB versions the check (``if (cont_thread != 0)'')
+ does not have the desired effect because of sillyness in
+ the way that the remote protocol handles specifying a
+ thread. Since thread support relies on qSymbol support
+ anyway, assume GDB can handle threads. */
+
+ if (using_threads && !disable_packet_Tthread)
+ {
+ /* This if (1) ought to be unnecessary. But remote_wait
+ in GDB will claim this event belongs to inferior_ptid
+ if we do not specify a thread, and there's no way for
+ gdbserver to know what inferior_ptid is. */
+ if (1 || !ptid_equal (general_thread, ptid))
+ {
+ int core = -1;
+ /* In non-stop, don't change the general thread behind
+ GDB's back. */
+ if (!non_stop)
+ general_thread = ptid;
+ sprintf (buf, "thread:");
+ buf += strlen (buf);
+ buf = write_ptid (buf, ptid);
+ strcat (buf, ";");
+ buf += strlen (buf);
+
+ core = target_core_of_thread (ptid);
+
+ if (core != -1)
+ {
+ sprintf (buf, "core:");
+ buf += strlen (buf);
+ sprintf (buf, "%x", core);
+ strcat (buf, ";");
+ buf += strlen (buf);
+ }
+ }
+ }
+
+ if (dlls_changed)
+ {
+ strcpy (buf, "library:;");
+ buf += strlen (buf);
+ dlls_changed = 0;
+ }
+
+ current_thread = saved_thread;
+ }
+ break;
+ case TARGET_WAITKIND_EXITED:
+ if (multi_process)
+ sprintf (buf, "W%x;process:%x",
+ status->value.integer, ptid_get_pid (ptid));
+ else
+ sprintf (buf, "W%02x", status->value.integer);
+ break;
+ case TARGET_WAITKIND_SIGNALLED:
+ if (multi_process)
+ sprintf (buf, "X%x;process:%x",
+ status->value.sig, ptid_get_pid (ptid));
+ else
+ sprintf (buf, "X%02x", status->value.sig);
+ break;
+ case TARGET_WAITKIND_THREAD_EXITED:
+ sprintf (buf, "w%x;", status->value.integer);
+ buf += strlen (buf);
+ buf = write_ptid (buf, ptid);
+ break;
+ case TARGET_WAITKIND_NO_RESUMED:
+ sprintf (buf, "N");
+ break;
+ default:
+ error ("unhandled waitkind");
+ break;
}
- /* For W and X, we're done. */
- *buf++ = 0;
}
void
-decode_m_packet (from, mem_addr_ptr, len_ptr)
- char *from;
- CORE_ADDR *mem_addr_ptr;
- unsigned int *len_ptr;
+decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr)
{
int i = 0, j = 0;
char ch;
}
void
-decode_M_packet (from, mem_addr_ptr, len_ptr, to)
- char *from, *to;
- CORE_ADDR *mem_addr_ptr;
- unsigned int *len_ptr;
+decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr,
+ unsigned char **to_p)
{
int i = 0;
char ch;
*len_ptr |= fromhex (ch) & 0x0f;
}
- convert_ascii_to_int (&from[i++], to, *len_ptr);
+ if (*to_p == NULL)
+ *to_p = (unsigned char *) xmalloc (*len_ptr);
+
+ hex2bin (&from[i++], *to_p, *len_ptr);
}
+
+int
+decode_X_packet (char *from, int packet_len, CORE_ADDR *mem_addr_ptr,
+ unsigned int *len_ptr, unsigned char **to_p)
+{
+ int i = 0;
+ char ch;
+ *mem_addr_ptr = *len_ptr = 0;
+
+ while ((ch = from[i++]) != ',')
+ {
+ *mem_addr_ptr = *mem_addr_ptr << 4;
+ *mem_addr_ptr |= fromhex (ch) & 0x0f;
+ }
+
+ while ((ch = from[i++]) != ':')
+ {
+ *len_ptr = *len_ptr << 4;
+ *len_ptr |= fromhex (ch) & 0x0f;
+ }
+
+ if (*to_p == NULL)
+ *to_p = (unsigned char *) xmalloc (*len_ptr);
+
+ if (remote_unescape_input ((const gdb_byte *) &from[i], packet_len - i,
+ *to_p, *len_ptr) != *len_ptr)
+ return -1;
+
+ return 0;
+}
+
+/* Decode a qXfer write request. */
+
+int
+decode_xfer_write (char *buf, int packet_len, CORE_ADDR *offset,
+ unsigned int *len, unsigned char *data)
+{
+ char ch;
+ char *b = buf;
+
+ /* Extract the offset. */
+ *offset = 0;
+ while ((ch = *buf++) != ':')
+ {
+ *offset = *offset << 4;
+ *offset |= fromhex (ch) & 0x0f;
+ }
+
+ /* Get encoded data. */
+ packet_len -= buf - b;
+ *len = remote_unescape_input ((const gdb_byte *) buf, packet_len,
+ data, packet_len);
+ return 0;
+}
+
+/* Decode the parameters of a qSearch:memory packet. */
+
+int
+decode_search_memory_packet (const char *buf, int packet_len,
+ CORE_ADDR *start_addrp,
+ CORE_ADDR *search_space_lenp,
+ gdb_byte *pattern, unsigned int *pattern_lenp)
+{
+ const char *p = buf;
+
+ p = decode_address_to_semicolon (start_addrp, p);
+ p = decode_address_to_semicolon (search_space_lenp, p);
+ packet_len -= p - buf;
+ *pattern_lenp = remote_unescape_input ((const gdb_byte *) p, packet_len,
+ pattern, packet_len);
+ return 0;
+}
+
+static void
+free_sym_cache (struct sym_cache *sym)
+{
+ if (sym != NULL)
+ {
+ free (sym->name);
+ free (sym);
+ }
+}
+
+void
+clear_symbol_cache (struct sym_cache **symcache_p)
+{
+ struct sym_cache *sym, *next;
+
+ /* Check the cache first. */
+ for (sym = *symcache_p; sym; sym = next)
+ {
+ next = sym->next;
+ free_sym_cache (sym);
+ }
+
+ *symcache_p = NULL;
+}
+
+/* Get the address of NAME, and return it in ADDRP if found. if
+ MAY_ASK_GDB is false, assume symbol cache misses are failures.
+ Returns 1 if the symbol is found, 0 if it is not, -1 on error. */
+
+int
+look_up_one_symbol (const char *name, CORE_ADDR *addrp, int may_ask_gdb)
+{
+ char own_buf[266], *p, *q;
+ int len;
+ struct sym_cache *sym;
+ struct process_info *proc;
+
+ proc = current_process ();
+
+ /* Check the cache first. */
+ for (sym = proc->symbol_cache; sym; sym = sym->next)
+ if (strcmp (name, sym->name) == 0)
+ {
+ *addrp = sym->addr;
+ return 1;
+ }
+
+ /* It might not be an appropriate time to look up a symbol,
+ e.g. while we're trying to fetch registers. */
+ if (!may_ask_gdb)
+ return 0;
+
+ /* Send the request. */
+ strcpy (own_buf, "qSymbol:");
+ bin2hex ((const gdb_byte *) name, own_buf + strlen ("qSymbol:"),
+ strlen (name));
+ if (putpkt (own_buf) < 0)
+ return -1;
+
+ /* FIXME: Eventually add buffer overflow checking (to getpkt?) */
+ len = getpkt (own_buf);
+ if (len < 0)
+ return -1;
+
+ /* We ought to handle pretty much any packet at this point while we
+ wait for the qSymbol "response". That requires re-entering the
+ main loop. For now, this is an adequate approximation; allow
+ GDB to read from memory while it figures out the address of the
+ symbol. */
+ while (own_buf[0] == 'm')
+ {
+ CORE_ADDR mem_addr;
+ unsigned char *mem_buf;
+ unsigned int mem_len;
+
+ decode_m_packet (&own_buf[1], &mem_addr, &mem_len);
+ mem_buf = (unsigned char *) xmalloc (mem_len);
+ if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0)
+ bin2hex (mem_buf, own_buf, mem_len);
+ else
+ write_enn (own_buf);
+ free (mem_buf);
+ if (putpkt (own_buf) < 0)
+ return -1;
+ len = getpkt (own_buf);
+ if (len < 0)
+ return -1;
+ }
+
+ if (!startswith (own_buf, "qSymbol:"))
+ {
+ warning ("Malformed response to qSymbol, ignoring: %s\n", own_buf);
+ return -1;
+ }
+
+ p = own_buf + strlen ("qSymbol:");
+ q = p;
+ while (*q && *q != ':')
+ q++;
+
+ /* Make sure we found a value for the symbol. */
+ if (p == q || *q == '\0')
+ return 0;
+
+ decode_address (addrp, p, q - p);
+
+ /* Save the symbol in our cache. */
+ sym = XNEW (struct sym_cache);
+ sym->name = xstrdup (name);
+ sym->addr = *addrp;
+ sym->next = proc->symbol_cache;
+ proc->symbol_cache = sym;
+
+ return 1;
+}
+
+/* Relocate an instruction to execute at a different address. OLDLOC
+ is the address in the inferior memory where the instruction to
+ relocate is currently at. On input, TO points to the destination
+ where we want the instruction to be copied (and possibly adjusted)
+ to. On output, it points to one past the end of the resulting
+ instruction(s). The effect of executing the instruction at TO
+ shall be the same as if executing it at OLDLOC. For example, call
+ instructions that implicitly push the return address on the stack
+ should be adjusted to return to the instruction after OLDLOC;
+ relative branches, and other PC-relative instructions need the
+ offset adjusted; etc. Returns 0 on success, -1 on failure. */
+
+int
+relocate_instruction (CORE_ADDR *to, CORE_ADDR oldloc)
+{
+ char own_buf[266];
+ int len;
+ ULONGEST written = 0;
+
+ /* Send the request. */
+ strcpy (own_buf, "qRelocInsn:");
+ sprintf (own_buf, "qRelocInsn:%s;%s", paddress (oldloc),
+ paddress (*to));
+ if (putpkt (own_buf) < 0)
+ return -1;
+
+ /* FIXME: Eventually add buffer overflow checking (to getpkt?) */
+ len = getpkt (own_buf);
+ if (len < 0)
+ return -1;
+
+ /* We ought to handle pretty much any packet at this point while we
+ wait for the qRelocInsn "response". That requires re-entering
+ the main loop. For now, this is an adequate approximation; allow
+ GDB to access memory. */
+ while (own_buf[0] == 'm' || own_buf[0] == 'M' || own_buf[0] == 'X')
+ {
+ CORE_ADDR mem_addr;
+ unsigned char *mem_buf = NULL;
+ unsigned int mem_len;
+
+ if (own_buf[0] == 'm')
+ {
+ decode_m_packet (&own_buf[1], &mem_addr, &mem_len);
+ mem_buf = (unsigned char *) xmalloc (mem_len);
+ if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0)
+ bin2hex (mem_buf, own_buf, mem_len);
+ else
+ write_enn (own_buf);
+ }
+ else if (own_buf[0] == 'X')
+ {
+ if (decode_X_packet (&own_buf[1], len - 1, &mem_addr,
+ &mem_len, &mem_buf) < 0
+ || write_inferior_memory (mem_addr, mem_buf, mem_len) != 0)
+ write_enn (own_buf);
+ else
+ write_ok (own_buf);
+ }
+ else
+ {
+ decode_M_packet (&own_buf[1], &mem_addr, &mem_len, &mem_buf);
+ if (write_inferior_memory (mem_addr, mem_buf, mem_len) == 0)
+ write_ok (own_buf);
+ else
+ write_enn (own_buf);
+ }
+ free (mem_buf);
+ if (putpkt (own_buf) < 0)
+ return -1;
+ len = getpkt (own_buf);
+ if (len < 0)
+ return -1;
+ }
+
+ if (own_buf[0] == 'E')
+ {
+ warning ("An error occurred while relocating an instruction: %s\n",
+ own_buf);
+ return -1;
+ }
+
+ if (!startswith (own_buf, "qRelocInsn:"))
+ {
+ warning ("Malformed response to qRelocInsn, ignoring: %s\n",
+ own_buf);
+ return -1;
+ }
+
+ unpack_varlen_hex (own_buf + strlen ("qRelocInsn:"), &written);
+
+ *to += written;
+ return 0;
+}
+
+void
+monitor_output (const char *msg)
+{
+ int len = strlen (msg);
+ char *buf = (char *) xmalloc (len * 2 + 2);
+
+ buf[0] = 'O';
+ bin2hex ((const gdb_byte *) msg, buf + 1, len);
+
+ putpkt (buf);
+ free (buf);
+}
+
+#endif
projects / deliverable / binutils-gdb.git / blobdiff