X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fgdbserver%2Fremote-utils.c;h=385a0bc5573b57495a01ace5ae10146752476bad;hb=ec48365dd86cceb7bfc5e1c9ba9a68b01600abf3;hp=362bfdbc5babce1568f87f4969e2c9fd4ce75647;hpb=bce7165daae97585d93ac28361576feebcc80721;p=deliverable%2Fbinutils-gdb.git
diff --git a/gdb/gdbserver/remote-utils.c b/gdb/gdbserver/remote-utils.c
index 362bfdbc5b..385a0bc557 100644
--- a/gdb/gdbserver/remote-utils.c
+++ b/gdb/gdbserver/remote-utils.c
@@ -1,12 +1,13 @@
/* Remote utility routines for the remote server for GDB.
Copyright (C) 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
- 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+ 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,
@@ -15,18 +16,19 @@
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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see . */
#include "server.h"
#include "terminal.h"
+#include "target.h"
#include
#include
#if HAVE_SYS_IOCTL_H
#include
#endif
+#if HAVE_SYS_FILE_H
#include
+#endif
#if HAVE_NETINET_IN_H
#include
#endif
@@ -42,52 +44,161 @@
#if HAVE_SYS_IOCTL_H
#include
#endif
+#if HAVE_SIGNAL_H
#include
+#endif
+#if HAVE_FCNTL_H
#include
+#endif
#include
+#if HAVE_UNISTD_H
#include
+#endif
#if HAVE_ARPA_INET_H
#include
#endif
#include
+#if HAVE_ERRNO_H
#include
+#endif
#if USE_WIN32API
-#include
+#include
#endif
+#if __QNX__
+#include
+#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
{
- const char *name;
+ char *name;
CORE_ADDR addr;
struct sym_cache *next;
};
-/* The symbol cache. */
-static struct sym_cache *symbol_cache;
-
-/* If this flag has been set, assume cache misses are
- failures. */
-int all_symbols_looked_up;
-
int remote_debug = 0;
struct ui_file *gdb_stdlog;
-static int remote_desc;
+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, buf, len, 0)
-# define write(fd, buf, len) send (fd, buf, len, 0)
+# 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;
+}
+
+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)
+ fprintf (stderr, "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
+ close (listen_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 (listen_desc); /* No longer need this */
+#endif
+
+ delete_file_handler (listen_desc);
+
+ /* Convert IP address to string. */
+ fprintf (stderr, "Remote debugging from host %s\n",
+ inet_ntoa (sockaddr.sin_addr));
+
+ 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;
+}
/* Open a connection to a remote debugger.
NAME is the filename used for communication. */
@@ -95,9 +206,6 @@ extern int debug_threads;
void
remote_open (char *name)
{
-#if defined(F_SETFL) && defined (FASYNC)
- int save_fcntl_flags;
-#endif
char *port_str;
port_str = strchr (name, ':');
@@ -165,6 +273,13 @@ remote_open (char *name)
#endif
fprintf (stderr, "Remote debugging using %s\n", name);
+
+ transport_is_reliable = 0;
+
+ enable_async_notification (remote_desc);
+
+ /* Register the event loop handler. */
+ add_file_handler (remote_desc, handle_serial_event, NULL);
#endif /* USE_WIN32API */
}
else
@@ -172,15 +287,14 @@ remote_open (char *name)
#ifdef USE_WIN32API
static int winsock_initialized;
#endif
- char *port_str;
int port;
struct sockaddr_in sockaddr;
socklen_t tmp;
- int tmp_desc;
+ char *port_end;
- port_str = strchr (name, ':');
-
- port = atoi (port_str + 1);
+ port = strtoul (port_str + 1, &port_end, 10);
+ if (port_str[1] == '\0' || *port_end != '\0')
+ fatal ("Bad port argument: %s", name);
#ifdef USE_WIN32API
if (!winsock_initialized)
@@ -192,21 +306,21 @@ remote_open (char *name)
}
#endif
- tmp_desc = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
- if (tmp_desc < 0)
+ 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 (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp,
+ 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 (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr))
- || listen (tmp_desc, 1))
+ if (bind (listen_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr))
+ || listen (listen_desc, 1))
perror_with_name ("Can't bind address");
/* If port is zero, a random port will be selected, and the
@@ -214,7 +328,7 @@ remote_open (char *name)
if (port == 0)
{
socklen_t len = sizeof (sockaddr);
- if (getsockname (tmp_desc, (struct sockaddr *) &sockaddr, &len) < 0
+ if (getsockname (listen_desc, (struct sockaddr *) &sockaddr, &len) < 0
|| len < sizeof (sockaddr))
perror_with_name ("Can't determine port");
port = ntohs (sockaddr.sin_port);
@@ -223,54 +337,26 @@ remote_open (char *name)
fprintf (stderr, "Listening on port %d\n", port);
fflush (stderr);
- tmp = sizeof (sockaddr);
- remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp);
- if (remote_desc == -1)
- perror_with_name ("Accept failed");
-
- /* Enable TCP keep alive process. */
- tmp = 1;
- setsockopt (tmp_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));
-
+ /* Register the event loop handler. */
+ add_file_handler (listen_desc, handle_accept_event, NULL);
-#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));
+ transport_is_reliable = 1;
}
-
-#if defined(F_SETFL) && defined (FASYNC)
- save_fcntl_flags = fcntl (remote_desc, F_GETFL, 0);
- fcntl (remote_desc, F_SETFL, save_fcntl_flags | FASYNC);
-#if defined (F_SETOWN)
- fcntl (remote_desc, F_SETOWN, getpid ());
-#endif
-#endif
- disable_async_io ();
}
void
remote_close (void)
{
+ delete_file_handler (remote_desc);
+
#ifdef USE_WIN32API
closesocket (remote_desc);
#else
close (remote_desc);
#endif
+ remote_desc = INVALID_DESCRIPTOR;
+
+ reset_readchar ();
}
/* Convert hex digit A to a number. */
@@ -287,6 +373,33 @@ fromhex (int a)
return 0;
}
+#endif
+
+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;
+}
+
+#ifndef IN_PROCESS_AGENT
+
int
unhexify (char *bin, const char *hex, int count)
{
@@ -295,11 +408,11 @@ 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;
}
@@ -339,6 +452,8 @@ decode_address_to_semicolon (CORE_ADDR *addrp, const char *start)
return end;
}
+#endif
+
/* Convert number NIB to a hex digit. */
static int
@@ -350,6 +465,8 @@ tohex (int nib)
return 'a' + nib - 10;
}
+#ifndef IN_PROCESS_AGENT
+
int
hexify (char *hex, const char *bin, int count)
{
@@ -493,26 +610,130 @@ try_rle (char *buf, int remaining, unsigned char *csum, char **p)
return n + 1;
}
+#endif
+
+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;
+}
+
+#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);
+
+ 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. */
-int
-putpkt_binary (char *buf, int cnt)
+static int
+putpkt_binary_1 (char *buf, int cnt, int is_notif)
{
int i;
unsigned char csum = 0;
char *buf2;
- char buf3[1];
char *p;
+ int cc;
- 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);
@@ -527,47 +748,63 @@ putpkt_binary (char *buf, int cnt)
do
{
- int cc;
-
if (write (remote_desc, buf2, p - buf2) != p - buf2)
{
perror ("putpkt(write)");
+ free (buf2);
return -1;
}
- if (remote_debug)
+ if (noack_mode || is_notif)
{
- fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2);
- fflush (stderr);
+ /* 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;
}
- cc = read (remote_desc, buf3, 1);
+
if (remote_debug)
{
- fprintf (stderr, "[received '%c' (0x%x)]\n", buf3[0], buf3[0]);
+ fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2);
fflush (stderr);
}
- if (cc <= 0)
- {
- if (cc == 0)
- fprintf (stderr, "putpkt(read): Got EOF\n");
- else
- perror ("putpkt(read)");
+ 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 (buf3[0] == '\003')
+ if (cc == '\003' && current_inferior != 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. */
@@ -578,11 +815,16 @@ putpkt (char *buf)
return putpkt_binary (buf, strlen (buf));
}
-#ifndef USE_WIN32API
+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
+ 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
@@ -600,46 +842,70 @@ 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->request_interrupt) ();
}
}
-#endif
+
+/* 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. */
-void
-block_async_io (void)
+static void
+unblock_async_io (void)
{
#ifndef USE_WIN32API
sigset_t sigio_set;
+
sigemptyset (&sigio_set);
sigaddset (&sigio_set, SIGIO);
- sigprocmask (SIG_BLOCK, &sigio_set, NULL);
+ sigprocmask (SIG_UNBLOCK, &sigio_set, NULL);
#endif
}
-void
-unblock_async_io (void)
+#ifdef __QNX__
+static void
+nto_comctrl (int enable)
{
-#ifndef USE_WIN32API
- sigset_t sigio_set;
- sigemptyset (&sigio_set);
- sigaddset (&sigio_set, SIGIO);
- sigprocmask (SIG_UNBLOCK, &sigio_set, NULL);
-#endif
+ 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;
@@ -655,6 +921,9 @@ enable_async_io (void)
signal (SIGIO, input_interrupt);
#endif
async_io_enabled = 1;
+#ifdef __QNX__
+ nto_comctrl (1);
+#endif /* __QNX__ */
}
/* Disable asynchronous I/O. */
@@ -668,35 +937,100 @@ disable_async_io (void)
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 (void)
{
- static unsigned char buf[BUFSIZ];
- static int bufcnt = 0;
- static unsigned char *bufp;
+ int ch;
- if (bufcnt-- > 0)
- return *bufp++;
+ if (readchar_bufcnt == 0)
+ {
+ readchar_bufcnt = read (remote_desc, readchar_buf, sizeof (readchar_buf));
- bufcnt = read (remote_desc, buf, sizeof (buf));
+ if (readchar_bufcnt <= 0)
+ {
+ if (readchar_bufcnt == 0)
+ 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;
}
- bufp = buf;
- bufcnt--;
- return *bufp++ & 0x7f;
+ 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;
+
+ 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,
@@ -747,23 +1081,44 @@ getpkt (char *buf)
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 (remote_desc, "-", 1) != 1)
+ return -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);
+ if (write (remote_desc, "+", 1) != 1)
+ return -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;
@@ -787,8 +1142,10 @@ write_enn (char *buf)
buf[3] = '\0';
}
+#endif
+
void
-convert_int_to_ascii (unsigned char *from, char *to, int n)
+convert_int_to_ascii (const unsigned char *from, char *to, int n)
{
int nib;
int ch;
@@ -803,9 +1160,10 @@ convert_int_to_ascii (unsigned char *from, char *to, int n)
*to++ = 0;
}
+#ifndef IN_PROCESS_AGENT
void
-convert_ascii_to_int (char *from, unsigned char *to, int n)
+convert_ascii_to_int (const char *from, unsigned char *to, int n)
{
int nib1, nib2;
while (n--)
@@ -817,7 +1175,7 @@ convert_ascii_to_int (char *from, unsigned char *to, int n)
}
static char *
-outreg (int regno, char *buf)
+outreg (struct regcache *regcache, int regno, char *buf)
{
if ((regno >> 12) != 0)
*buf++ = tohex ((regno >> 12) & 0xf);
@@ -826,7 +1184,7 @@ outreg (int regno, char *buf)
*buf++ = tohex ((regno >> 4) & 0xf);
*buf++ = tohex (regno & 0xf);
*buf++ = ':';
- collect_register_as_string (regno, buf);
+ collect_register_as_string (regcache, regno, buf);
buf += 2 * register_size (regno);
*buf++ = ';';
@@ -867,81 +1225,128 @@ dead_thread_notify (int id)
}
void
-prepare_resume_reply (char *buf, char status, unsigned char sig)
+prepare_resume_reply (char *buf, ptid_t ptid,
+ struct target_waitstatus *status)
{
- int nib;
+ if (debug_threads)
+ fprintf (stderr, "Writing resume reply for %s:%d\n\n",
+ target_pid_to_str (ptid), status->kind);
- *buf++ = status;
+ switch (status->kind)
+ {
+ case TARGET_WAITKIND_STOPPED:
+ {
+ struct thread_info *saved_inferior;
+ const char **regp;
+ struct regcache *regcache;
- nib = ((sig & 0xf0) >> 4);
- *buf++ = tohex (nib);
- nib = sig & 0x0f;
- *buf++ = tohex (nib);
+ sprintf (buf, "T%02x", status->value.sig);
+ buf += strlen (buf);
- if (status == 'T')
- {
- const char **regp = gdbserver_expedite_regs;
+ regp = gdbserver_expedite_regs;
- if (the_target->stopped_by_watchpoint != NULL
- && (*the_target->stopped_by_watchpoint) ())
- {
- CORE_ADDR addr;
- int i;
+ saved_inferior = current_inferior;
- strncpy (buf, "watch:", 6);
- buf += 6;
+ current_inferior = find_thread_ptid (ptid);
- addr = (*the_target->stopped_data_address) ();
+ regcache = get_thread_regcache (current_inferior, 1);
- /* 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++ = ';';
- }
+ if (the_target->stopped_by_watchpoint != NULL
+ && (*the_target->stopped_by_watchpoint) ())
+ {
+ CORE_ADDR addr;
+ int i;
- while (*regp)
- {
- buf = outreg (find_regno (*regp), buf);
- regp ++;
- }
+ strncpy (buf, "watch:", 6);
+ buf += 6;
- /* 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. */
+ addr = (*the_target->stopped_data_address) ();
- if (using_threads)
- {
- unsigned int gdb_id_from_wait;
-
- /* FIXME right place to set this? */
- thread_from_wait = ((struct inferior_list_entry *)current_inferior)->id;
- 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;
- }
- }
+ /* 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 (regcache, 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
@@ -968,7 +1373,7 @@ decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr)
void
decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr,
- unsigned char *to)
+ unsigned char **to_p)
{
int i = 0;
char ch;
@@ -986,12 +1391,15 @@ decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr,
*len_ptr |= fromhex (ch) & 0x0f;
}
- convert_ascii_to_int (&from[i++], to, *len_ptr);
+ if (*to_p == NULL)
+ *to_p = xmalloc (*len_ptr);
+
+ convert_ascii_to_int (&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)
+ unsigned int *len_ptr, unsigned char **to_p)
{
int i = 0;
char ch;
@@ -1009,37 +1417,114 @@ decode_X_packet (char *from, int packet_len, CORE_ADDR *mem_addr_ptr,
*len_ptr |= fromhex (ch) & 0x0f;
}
+ if (*to_p == NULL)
+ *to_p = xmalloc (*len_ptr);
+
if (remote_unescape_input ((const gdb_byte *) &from[i], packet_len - i,
- to, *len_ptr) != *len_ptr)
+ *to_p, *len_ptr) != *len_ptr)
return -1;
return 0;
}
-/* Ask GDB for the address of NAME, and return it in ADDRP if found.
+/* 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;
+}
+
+/* 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)
+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 = 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 (all_symbols_looked_up)
+ /* 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. */
@@ -1053,15 +1538,34 @@ look_up_one_symbol (const char *name, CORE_ADDR *addrp)
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;
}
@@ -1077,19 +1581,114 @@ look_up_one_symbol (const char *name, CORE_ADDR *addrp)
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;
}
+/* 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 FROM. 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 = 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);
+ }
+ 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 (strncmp (own_buf, "qRelocInsn:", strlen ("qRelocInsn:")) != 0)
+ {
+ 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)
{
- char *buf = malloc (strlen (msg) * 2 + 2);
+ char *buf = xmalloc (strlen (msg) * 2 + 2);
buf[0] = 'O';
hexify (buf + 1, msg, 0);
@@ -1097,3 +1696,169 @@ monitor_output (const char *msg)
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);
+}
+
+#endif