/* Remote utility routines for the remote server for GDB.
- Copyright 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
- 2002, 2003, 2004, 2005
+ Copyright (C) 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+ 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ 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,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "server.h"
#include "terminal.h"
+#include "target.h"
#include <stdio.h>
#include <string.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 <sys/time.h>
+#if HAVE_UNISTD_H
#include <unistd.h>
+#endif
+#if HAVE_ARPA_INET_H
#include <arpa/inet.h>
+#endif
+#include <sys/stat.h>
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+
+#if USE_WIN32API
+#include <winsock.h>
+#endif
+
+#if __QNX__
+#include <sys/iomgr.h>
+#endif /* __QNX__ */
#ifndef HAVE_SOCKLEN_T
typedef int socklen_t;
#endif
+#if USE_WIN32API
+# define INVALID_DESCRIPTOR INVALID_SOCKET
+#else
+# define INVALID_DESCRIPTOR -1
+#endif
+
/* A cache entry for a successfully looked-up symbol. */
struct sym_cache
{
- const char *name;
+ char *name;
CORE_ADDR addr;
struct sym_cache *next;
};
-/* The symbol cache. */
-static struct sym_cache *symbol_cache;
-
int remote_debug = 0;
struct ui_file *gdb_stdlog;
-static int remote_desc;
+static int remote_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
+
/* Open a connection to a remote debugger.
NAME is the filename used for communication. */
void
remote_open (char *name)
{
+#if defined(F_SETFL) && defined (FASYNC)
int save_fcntl_flags;
-
- if (!strchr (name, ':'))
+#endif
+ char *port_str;
+
+ port_str = strchr (name, ':');
+ if (port_str == NULL)
{
- remote_desc = open (name, O_RDWR);
+#ifdef USE_WIN32API
+ error ("Only <host>:<port> is supported on this platform.");
+#else
+ 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");
#endif
fprintf (stderr, "Remote debugging using %s\n", name);
+#endif /* USE_WIN32API */
+
+ transport_is_reliable = 0;
}
else
{
- char *port_str;
+#ifdef USE_WIN32API
+ static int winsock_initialized;
+#endif
int port;
struct sockaddr_in sockaddr;
socklen_t tmp;
int tmp_desc;
+ char *port_end;
+
+ port = strtoul (port_str + 1, &port_end, 10);
+ if (port_str[1] == '\0' || *port_end != '\0')
+ fatal ("Bad port argument: %s", name);
- port_str = strchr (name, ':');
+#ifdef USE_WIN32API
+ if (!winsock_initialized)
+ {
+ WSADATA wsad;
- port = atoi (port_str + 1);
+ WSAStartup (MAKEWORD (1, 0), &wsad);
+ winsock_initialized = 1;
+ }
+#endif
- tmp_desc = socket (PF_INET, SOCK_STREAM, 0);
+ tmp_desc = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
if (tmp_desc < 0)
perror_with_name ("Can't open socket");
|| listen (tmp_desc, 1))
perror_with_name ("Can't bind address");
+ /* If port is zero, a random port will be selected, and the
+ fprintf below needs to know what port was selected. */
+ if (port == 0)
+ {
+ socklen_t len = sizeof (sockaddr);
+ if (getsockname (tmp_desc, (struct sockaddr *) &sockaddr, &len) < 0
+ || len < sizeof (sockaddr))
+ perror_with_name ("Can't determine port");
+ port = ntohs (sockaddr.sin_port);
+ }
+
fprintf (stderr, "Listening on port %d\n", port);
+ fflush (stderr);
tmp = sizeof (sockaddr);
remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp);
/* Enable TCP keep alive process. */
tmp = 1;
- setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp));
+ setsockopt (remote_desc, SOL_SOCKET, SO_KEEPALIVE,
+ (char *) &tmp, sizeof (tmp));
/* Tell TCP not to delay small packets. This greatly speeds up
- interactive response. */
+ interactive response. */
tmp = 1;
setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY,
(char *) &tmp, sizeof (tmp));
+
+#ifndef USE_WIN32API
close (tmp_desc); /* No longer need this */
signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply
exits when the remote side dies. */
+#else
+ closesocket (tmp_desc); /* No longer need this */
+#endif
/* Convert IP address to string. */
- fprintf (stderr, "Remote debugging from host %s\n",
- inet_ntoa (sockaddr.sin_addr));
+ fprintf (stderr, "Remote debugging from host %s\n",
+ inet_ntoa (sockaddr.sin_addr));
+
+ transport_is_reliable = 1;
}
#if defined(F_SETFL) && defined (FASYNC)
fcntl (remote_desc, F_SETOWN, getpid ());
#endif
#endif
- disable_async_io ();
+
+ /* Register the event loop handler. */
+ add_file_handler (remote_desc, handle_serial_event, NULL);
}
void
remote_close (void)
{
+ delete_file_handler (remote_desc);
+
+#ifdef USE_WIN32API
+ closesocket (remote_desc);
+#else
close (remote_desc);
+#endif
}
/* Convert hex digit A to a number. */
return 0;
}
+static const char hexchars[] = "0123456789abcdef";
+
+static int
+ishex (int ch, int *val)
+{
+ if ((ch >= 'a') && (ch <= 'f'))
+ {
+ *val = ch - 'a' + 10;
+ return 1;
+ }
+ if ((ch >= 'A') && (ch <= 'F'))
+ {
+ *val = ch - 'A' + 10;
+ return 1;
+ }
+ if ((ch >= '0') && (ch <= '9'))
+ {
+ *val = ch - '0';
+ return 1;
+ }
+ return 0;
+}
+
int
unhexify (char *bin, const char *hex, int count)
{
for (i = 0; i < count; i++)
{
if (hex[0] == 0 || hex[1] == 0)
- {
- /* Hex string is short, or of uneven length.
- Return the count that has been converted so far. */
- return i;
- }
+ {
+ /* Hex string is short, or of uneven length.
+ Return the count that has been converted so far. */
+ return i;
+ }
*bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
hex += 2;
}
return i;
}
-static void
+void
decode_address (CORE_ADDR *addrp, const char *start, int len)
{
CORE_ADDR addr;
*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;
+}
+
/* Convert number NIB to a hex digit. */
static int
return i;
}
-/* Send a packet to the remote machine, with error checking.
- The data of the packet is in BUF. Returns >= 0 on success, -1 otherwise. */
+/* Convert BUFFER, binary data at least LEN bytes long, into escaped
+ binary data in OUT_BUF. Set *OUT_LEN to the length of the data
+ encoded in OUT_BUF, and return the number of bytes in OUT_BUF
+ (which may be more than *OUT_LEN due to escape characters). The
+ total number of bytes in the output buffer will be at most
+ OUT_MAXLEN. */
int
-putpkt (char *buf)
+remote_escape_output (const gdb_byte *buffer, int len,
+ gdb_byte *out_buf, int *out_len,
+ int out_maxlen)
+{
+ int input_index, output_index;
+
+ output_index = 0;
+ for (input_index = 0; input_index < len; input_index++)
+ {
+ gdb_byte b = buffer[input_index];
+
+ if (b == '$' || b == '#' || b == '}' || b == '*')
+ {
+ /* These must be escaped. */
+ if (output_index + 2 > out_maxlen)
+ break;
+ out_buf[output_index++] = '}';
+ out_buf[output_index++] = b ^ 0x20;
+ }
+ else
+ {
+ if (output_index + 1 > out_maxlen)
+ break;
+ out_buf[output_index++] = b;
+ }
+ }
+
+ *out_len = input_index;
+ return output_index;
+}
+
+/* Convert BUFFER, escaped data LEN bytes long, into binary data
+ in OUT_BUF. Return the number of bytes written to OUT_BUF.
+ Raise an error if the total number of bytes exceeds OUT_MAXLEN.
+
+ This function reverses remote_escape_output. It allows more
+ escaped characters than that function does, in particular because
+ '*' must be escaped to avoid the run-length encoding processing
+ in reading packets. */
+
+static int
+remote_unescape_input (const gdb_byte *buffer, int len,
+ gdb_byte *out_buf, int out_maxlen)
+{
+ int input_index, output_index;
+ int escaped;
+
+ output_index = 0;
+ escaped = 0;
+ for (input_index = 0; input_index < len; input_index++)
+ {
+ gdb_byte b = buffer[input_index];
+
+ if (output_index + 1 > out_maxlen)
+ error ("Received too much data from the target.");
+
+ if (escaped)
+ {
+ out_buf[output_index++] = b ^ 0x20;
+ escaped = 0;
+ }
+ else if (b == '}')
+ escaped = 1;
+ else
+ out_buf[output_index++] = b;
+ }
+
+ if (escaped)
+ error ("Unmatched escape character in target response.");
+
+ return output_index;
+}
+
+/* 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];
+
+ /* Don't go past '~'. */
+ if (remaining > 97)
+ remaining = 97;
+
+ 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;
+}
+
+char *
+unpack_varlen_hex (char *buff, /* packet to parse */
+ ULONGEST *result)
+{
+ int nibble;
+ ULONGEST retval = 0;
+
+ while (ishex (*buff, &nibble))
+ {
+ buff++;
+ retval = retval << 4;
+ retval |= nibble & 0x0f;
+ }
+ *result = retval;
+ return buff;
+}
+
+/* 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);
+
+ return buf;
+}
+
+ULONGEST
+hex_or_minus_one (char *buf, char **obuf)
+{
+ ULONGEST ret;
+
+ if (strncmp (buf, "-1", 2) == 0)
+ {
+ 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)
+{
+ 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 the stub is not sending a process id, then default to
+ what's in the current inferior. */
+ pid = ptid_get_pid (((struct inferior_list_entry *) current_inferior)->id);
+
+ if (obuf)
+ *obuf = pp;
+ return ptid_build (pid, tid, 0);
+}
+
+/* Send a packet to the remote machine, with error checking.
+ The data of the packet is in BUF, and the length of the
+ packet is in CNT. Returns >= 0 on success, -1 otherwise. */
+
+static int
+putpkt_binary_1 (char *buf, int cnt, int is_notif)
{
int i;
unsigned char csum = 0;
char *buf2;
char buf3[1];
- int cnt = strlen (buf);
char *p;
- buf2 = malloc (PBUFSIZ);
+ buf2 = xmalloc (PBUFSIZ);
/* 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);
if (write (remote_desc, 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)
{
fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2);
}
/* Check for an input interrupt while we're here. */
- if (buf3[0] == '\003')
- (*the_target->send_signal) (SIGINT);
+ if (buf3[0] == '\003' && current_inferior != NULL)
+ (*the_target->request_interrupt) ();
}
while (buf3[0] != '+');
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. */
+ will cause us to request child interruption. */
static void
input_interrupt (int unused)
{
int cc;
char c = 0;
-
+
cc = read (remote_desc, &c, 1);
- if (cc != 1 || c != '\003')
+ if (cc != 1 || c != '\003' || current_inferior == NULL)
{
fprintf (stderr, "input_interrupt, count = %d c = %d ('%c')\n",
cc, c, c);
return;
}
-
- (*the_target->send_signal) (SIGINT);
+
+ (*the_target->request_interrupt) ();
}
}
+/* Check if the remote side sent us an interrupt request (^C). */
void
-block_async_io (void)
+check_remote_input_interrupt_request (void)
{
- sigset_t sigio_set;
- sigemptyset (&sigio_set);
- sigaddset (&sigio_set, SIGIO);
- sigprocmask (SIG_BLOCK, &sigio_set, NULL);
+ /* 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);
}
-void
+/* 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;
+
sigemptyset (&sigio_set);
sigaddset (&sigio_set, SIGIO);
sigprocmask (SIG_UNBLOCK, &sigio_set, NULL);
+#endif
}
-/* 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. */
+#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;
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. */
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 ();
}
/* Returns next char from remote GDB. -1 if error. */
static int
readchar (void)
{
- static char buf[BUFSIZ];
+ static unsigned char buf[BUFSIZ];
static int bufcnt = 0;
- static char *bufp;
+ static unsigned char *bufp;
if (bufcnt-- > 0)
- return *bufp++ & 0x7f;
+ return *bufp++;
bufcnt = read (remote_desc, buf, sizeof (buf));
bufp = buf;
bufcnt--;
- return *bufp++ & 0x7f;
+ return *bufp++;
}
/* Read a packet from the remote machine, with error checking,
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 (remote_debug)
+ if (!noack_mode)
{
- fprintf (stderr, "getpkt (\"%s\"); [sending ack] \n", buf);
- fflush (stderr);
- }
+ if (remote_debug)
+ {
+ fprintf (stderr, "getpkt (\"%s\"); [sending ack] \n", buf);
+ fflush (stderr);
+ }
- write (remote_desc, "+", 1);
+ write (remote_desc, "+", 1);
- if (remote_debug)
+ if (remote_debug)
+ {
+ fprintf (stderr, "[sent ack]\n");
+ fflush (stderr);
+ }
+ }
+ else
{
- fprintf (stderr, "[sent ack]\n");
- fflush (stderr);
+ if (remote_debug)
+ {
+ fprintf (stderr, "getpkt (\"%s\"); [no ack sent] \n", buf);
+ fflush (stderr);
+ }
}
return bp - buf;
}
void
-prepare_resume_reply (char *buf, char status, unsigned char signo)
+prepare_resume_reply (char *buf, ptid_t ptid,
+ struct target_waitstatus *status)
{
- int nib, sig;
-
- *buf++ = status;
-
- sig = (int)target_signal_from_host (signo);
+ if (debug_threads)
+ fprintf (stderr, "Writing resume reply for %s:%d\n\n",
+ target_pid_to_str (ptid), status->kind);
- nib = ((sig & 0xf0) >> 4);
- *buf++ = tohex (nib);
- nib = sig & 0x0f;
- *buf++ = tohex (nib);
-
- if (status == 'T')
+ switch (status->kind)
{
- const char **regp = gdbserver_expedite_regs;
+ case TARGET_WAITKIND_STOPPED:
+ {
+ struct thread_info *saved_inferior;
+ const char **regp;
- if (the_target->stopped_by_watchpoint != NULL
- && (*the_target->stopped_by_watchpoint) ())
- {
- CORE_ADDR addr;
- int i;
+ sprintf (buf, "T%02x", status->value.sig);
+ buf += strlen (buf);
- strncpy (buf, "watch:", 6);
- buf += 6;
+ regp = gdbserver_expedite_regs;
- addr = (*the_target->stopped_data_address) ();
+ saved_inferior = current_inferior;
- /* 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++ = ';';
- }
+ current_inferior = find_thread_ptid (ptid);
- while (*regp)
- {
- buf = outreg (find_regno (*regp), buf);
- regp ++;
- }
+ if (the_target->stopped_by_watchpoint != NULL
+ && (*the_target->stopped_by_watchpoint) ())
+ {
+ CORE_ADDR addr;
+ int i;
- /* 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. */
+ strncpy (buf, "watch:", 6);
+ buf += 6;
- if (using_threads)
- {
- /* FIXME right place to set this? */
- thread_from_wait = ((struct inferior_list_entry *)current_inferior)->id;
- unsigned int gdb_id_from_wait = thread_to_gdb_id (current_inferior);
-
- if (debug_threads)
- fprintf (stderr, "Writing resume reply for %ld\n\n", thread_from_wait);
- /* 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 || old_thread_from_wait != thread_from_wait)
- {
- general_thread = thread_from_wait;
- sprintf (buf, "thread:%x;", gdb_id_from_wait);
- buf += strlen (buf);
- old_thread_from_wait = thread_from_wait;
- }
- }
+ 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++ = ';';
+ }
+
+ while (*regp)
+ {
+ buf = outreg (find_regno (*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);
+
+ if (the_target->core_of_thread)
+ core = (*the_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_inferior = saved_inferior;
+ }
+ 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;
+ default:
+ error ("unhandled waitkind");
+ break;
}
- /* For W and X, we're done. */
- *buf++ = 0;
}
void
convert_ascii_to_int (&from[i++], to, *len_ptr);
}
+int
+decode_X_packet (char *from, int packet_len, CORE_ADDR *mem_addr_ptr,
+ unsigned int *len_ptr, unsigned char *to)
+{
+ 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 (remote_unescape_input ((const gdb_byte *) &from[i], packet_len - i,
+ to, *len_ptr) != *len_ptr)
+ return -1;
+
+ return 0;
+}
+
+/* Decode a qXfer write request. */
+int
+decode_xfer_write (char *buf, int packet_len, char **annex, CORE_ADDR *offset,
+ unsigned int *len, unsigned char *data)
+{
+ char ch;
+
+ /* Extract and NUL-terminate the annex. */
+ *annex = buf;
+ while (*buf && *buf != ':')
+ buf++;
+ if (*buf == '\0')
+ return -1;
+ *buf++ = 0;
+
+ /* Extract the offset. */
+ *offset = 0;
+ while ((ch = *buf++) != ':')
+ {
+ *offset = *offset << 4;
+ *offset |= fromhex (ch) & 0x0f;
+ }
+
+ /* Get encoded data. */
+ packet_len -= buf - *annex;
+ *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;
+}
+
/* Ask GDB for the address of NAME, and return it in ADDRP if found.
Returns 1 if the symbol is found, 0 if it is not, -1 on error. */
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 = symbol_cache; sym; sym = sym->next)
+ for (sym = proc->symbol_cache; sym; sym = sym->next)
if (strcmp (name, sym->name) == 0)
{
*addrp = sym->addr;
return 1;
}
+ /* If we've passed the call to thread_db_look_up_symbols, then
+ anything not in the cache must not exist; we're not interested
+ in any libraries loaded after that point, only in symbols in
+ libpthread.so. It might not be an appropriate time to look
+ up a symbol, e.g. while we're trying to fetch registers. */
+ if (proc->all_symbols_looked_up)
+ return 0;
+
/* Send the request. */
strcpy (own_buf, "qSymbol:");
hexify (own_buf + strlen ("qSymbol:"), name, strlen (name));
if (len < 0)
return -1;
- if (strncmp (own_buf, "qSymbol:", strlen ("qSymbol:")) != 0)
+ /* 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')
{
- /* Malformed response. */
- if (remote_debug)
- {
- fprintf (stderr, "Malformed response to qSymbol, ignoring.\n");
- fflush (stderr);
- }
+ CORE_ADDR mem_addr;
+ unsigned char *mem_buf;
+ unsigned int mem_len;
+
+ decode_m_packet (&own_buf[1], &mem_addr, &mem_len);
+ mem_buf = xmalloc (mem_len);
+ if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0)
+ convert_int_to_ascii (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 (strncmp (own_buf, "qSymbol:", strlen ("qSymbol:")) != 0)
+ {
+ warning ("Malformed response to qSymbol, ignoring: %s\n", own_buf);
return -1;
}
decode_address (addrp, p, q - p);
/* Save the symbol in our cache. */
- sym = malloc (sizeof (*sym));
- sym->name = strdup (name);
+ sym = xmalloc (sizeof (*sym));
+ sym->name = xstrdup (name);
sym->addr = *addrp;
- sym->next = symbol_cache;
- symbol_cache = sym;
+ sym->next = proc->symbol_cache;
+ proc->symbol_cache = sym;
return 1;
}
+
+void
+monitor_output (const char *msg)
+{
+ char *buf = xmalloc (strlen (msg) * 2 + 2);
+
+ buf[0] = 'O';
+ hexify (buf + 1, msg, 0);
+
+ putpkt (buf);
+ free (buf);
+}
+
+/* Return a malloc allocated string with special characters from TEXT
+ replaced by entity references. */
+
+char *
+xml_escape_text (const char *text)
+{
+ char *result;
+ int i, special;
+
+ /* Compute the length of the result. */
+ for (i = 0, special = 0; text[i] != '\0'; i++)
+ switch (text[i])
+ {
+ case '\'':
+ case '\"':
+ special += 5;
+ break;
+ case '&':
+ special += 4;
+ break;
+ case '<':
+ case '>':
+ special += 3;
+ break;
+ default:
+ break;
+ }
+
+ /* Expand the result. */
+ result = xmalloc (i + special + 1);
+ for (i = 0, special = 0; text[i] != '\0'; i++)
+ switch (text[i])
+ {
+ case '\'':
+ strcpy (result + i + special, "'");
+ special += 5;
+ break;
+ case '\"':
+ strcpy (result + i + special, """);
+ special += 5;
+ break;
+ case '&':
+ strcpy (result + i + special, "&");
+ special += 4;
+ break;
+ case '<':
+ strcpy (result + i + special, "<");
+ special += 3;
+ break;
+ case '>':
+ strcpy (result + i + special, ">");
+ special += 3;
+ break;
+ default:
+ result[i + special] = text[i];
+ break;
+ }
+ result[i + special] = '\0';
+
+ return result;
+}
+
+void
+buffer_grow (struct buffer *buffer, const char *data, size_t size)
+{
+ char *new_buffer;
+ size_t new_buffer_size;
+
+ if (size == 0)
+ return;
+
+ new_buffer_size = buffer->buffer_size;
+
+ if (new_buffer_size == 0)
+ new_buffer_size = 1;
+
+ while (buffer->used_size + size > new_buffer_size)
+ new_buffer_size *= 2;
+ new_buffer = realloc (buffer->buffer, new_buffer_size);
+ if (!new_buffer)
+ abort ();
+ memcpy (new_buffer + buffer->used_size, data, size);
+ buffer->buffer = new_buffer;
+ buffer->buffer_size = new_buffer_size;
+ buffer->used_size += size;
+}
+
+void
+buffer_free (struct buffer *buffer)
+{
+ if (!buffer)
+ return;
+
+ free (buffer->buffer);
+ buffer->buffer = NULL;
+ buffer->buffer_size = 0;
+ buffer->used_size = 0;
+}
+
+void
+buffer_init (struct buffer *buffer)
+{
+ memset (buffer, 0, sizeof (*buffer));
+}
+
+char*
+buffer_finish (struct buffer *buffer)
+{
+ char *ret = buffer->buffer;
+ buffer->buffer = NULL;
+ buffer->buffer_size = 0;
+ buffer->used_size = 0;
+ return ret;
+}
+
+void
+buffer_xml_printf (struct buffer *buffer, const char *format, ...)
+{
+ va_list ap;
+ const char *f;
+ const char *prev;
+ int percent = 0;
+
+ va_start (ap, format);
+
+ prev = format;
+ for (f = format; *f; f++)
+ {
+ if (percent)
+ {
+ switch (*f)
+ {
+ case 's':
+ {
+ char *p;
+ char *a = va_arg (ap, char *);
+ buffer_grow (buffer, prev, f - prev - 1);
+ p = xml_escape_text (a);
+ buffer_grow_str (buffer, p);
+ free (p);
+ prev = f + 1;
+ }
+ break;
+ case 'd':
+ {
+ int i = va_arg (ap, int);
+ char b[sizeof ("4294967295")];
+
+ buffer_grow (buffer, prev, f - prev - 1);
+ sprintf (b, "%d", i);
+ buffer_grow_str (buffer, b);
+ prev = f + 1;
+ }
+ }
+ percent = 0;
+ }
+ else if (*f == '%')
+ percent = 1;
+ }
+
+ buffer_grow_str (buffer, prev);
+ va_end (ap);
+}
projects / thirdparty / binutils-gdb.git / blobdiff