| /* 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, 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 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. |
| |
| 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 "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 <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_desc = INVALID_DESCRIPTOR; |
| static int 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; |
| } |
| |
| 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. */ |
| |
| void |
| remote_open (char *name) |
| { |
| char *port_str; |
| |
| port_str = strchr (name, ':'); |
| if (port_str == NULL) |
| { |
| #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"); |
| |
| #ifdef HAVE_TERMIOS |
| { |
| struct termios 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 |= CLOCAL | CS8; |
| termios.c_cc[VMIN] = 1; |
| termios.c_cc[VTIME] = 0; |
| |
| tcsetattr (remote_desc, TCSANOW, &termios); |
| } |
| #endif |
| |
| #ifdef HAVE_TERMIO |
| { |
| struct termio termio; |
| ioctl (remote_desc, TCGETA, &termio); |
| |
| termio.c_iflag = 0; |
| termio.c_oflag = 0; |
| termio.c_lflag = 0; |
| termio.c_cflag &= ~(CSIZE | PARENB); |
| termio.c_cflag |= CLOCAL | CS8; |
| termio.c_cc[VMIN] = 1; |
| termio.c_cc[VTIME] = 0; |
| |
| ioctl (remote_desc, TCSETA, &termio); |
| } |
| #endif |
| |
| #ifdef HAVE_SGTTY |
| { |
| struct sgttyb sg; |
| |
| ioctl (remote_desc, TIOCGETP, &sg); |
| sg.sg_flags = RAW; |
| ioctl (remote_desc, TIOCSETP, &sg); |
| } |
| #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 |
| { |
| #ifdef USE_WIN32API |
| static int winsock_initialized; |
| #endif |
| int port; |
| struct sockaddr_in sockaddr; |
| socklen_t tmp; |
| 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); |
| |
| #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"); |
| |
| /* 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 (listen_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); |
| |
| /* Register the event loop handler. */ |
| add_file_handler (listen_desc, handle_accept_event, NULL); |
| |
| transport_is_reliable = 1; |
| } |
| } |
| |
| 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. */ |
| |
| static int |
| fromhex (int a) |
| { |
| if (a >= '0' && a <= '9') |
| return a - '0'; |
| else if (a >= 'a' && a <= 'f') |
| return a - 'a' + 10; |
| else |
| error ("Reply contains invalid hex digit"); |
| 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) |
| { |
| int i; |
| |
| 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; |
| } |
| *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]); |
| hex += 2; |
| } |
| return i; |
| } |
| |
| void |
| decode_address (CORE_ADDR *addrp, const char *start, int len) |
| { |
| CORE_ADDR addr; |
| char ch; |
| int i; |
| |
| 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 |
| |
| /* Convert number NIB to a hex digit. */ |
| |
| static int |
| tohex (int nib) |
| { |
| if (nib < 10) |
| return '0' + nib; |
| else |
| return 'a' + nib - 10; |
| } |
| |
| #ifndef IN_PROCESS_AGENT |
| |
| int |
| hexify (char *hex, const char *bin, int count) |
| { |
| int i; |
| |
| /* May use a length, or a nul-terminated string as input. */ |
| if (count == 0) |
| count = strlen (bin); |
| |
| for (i = 0; i < count; i++) |
| { |
| *hex++ = tohex ((*bin >> 4) & 0xf); |
| *hex++ = tohex (*bin++ & 0xf); |
| } |
| *hex = 0; |
| return i; |
| } |
| |
| /* 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 |
| 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; |
| } |
| |
| #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. */ |
| |
| static int |
| putpkt_binary_1 (char *buf, int cnt, int is_notif) |
| { |
| int i; |
| unsigned char csum = 0; |
| char *buf2; |
| char *p; |
| int cc; |
| |
| buf2 = xmalloc (PBUFSIZ); |
| |
| /* Copy the packet into buffer BUF2, encapsulating it |
| and giving it a checksum. */ |
| |
| p = buf2; |
| if (is_notif) |
| *p++ = '%'; |
| else |
| *p++ = '$'; |
| |
| for (i = 0; i < cnt;) |
| i += try_rle (buf + i, cnt - i, &csum, &p); |
| |
| *p++ = '#'; |
| *p++ = tohex ((csum >> 4) & 0xf); |
| *p++ = tohex (csum & 0xf); |
| |
| *p = '\0'; |
| |
| /* Send it over and over until we get a positive ack. */ |
| |
| do |
| { |
| 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); |
| 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_inferior != NULL) |
| (*the_target->request_interrupt) (); |
| } |
| 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. 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 (int unused) |
| { |
| fd_set readset; |
| struct timeval immediate = { 0, 0 }; |
| |
| /* Protect against spurious interrupts. This has been observed to |
| be a problem under NetBSD 1.4 and 1.5. */ |
| |
| FD_ZERO (&readset); |
| FD_SET (remote_desc, &readset); |
| if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0) |
| { |
| int cc; |
| char c = 0; |
| |
| cc = read (remote_desc, &c, 1); |
| |
| 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) (); |
| } |
| } |
| |
| /* 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; |
| |
| 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 (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 (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 (void) |
| { |
| int ch; |
| |
| if (readchar_bufcnt == 0) |
| { |
| readchar_bufcnt = read (remote_desc, readchar_buf, sizeof (readchar_buf)); |
| |
| if (readchar_bufcnt <= 0) |
| { |
| if (readchar_bufcnt == 0) |
| fprintf (stderr, "readchar: Got EOF\n"); |
| else |
| perror ("readchar"); |
| |
| 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; |
| |
| 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 (char *buf) |
| { |
| char *bp; |
| unsigned char csum, c1, c2; |
| int c; |
| |
| while (1) |
| { |
| csum = 0; |
| |
| while (1) |
| { |
| c = readchar (); |
| if (c == '$') |
| break; |
| if (remote_debug) |
| { |
| fprintf (stderr, "[getpkt: discarding char '%c']\n", c); |
| fflush (stderr); |
| } |
| |
| if (c < 0) |
| return -1; |
| } |
| |
| bp = buf; |
| while (1) |
| { |
| c = readchar (); |
| if (c < 0) |
| return -1; |
| if (c == '#') |
| break; |
| *bp++ = c; |
| csum += c; |
| } |
| *bp = 0; |
| |
| 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 (!noack_mode) |
| { |
| if (remote_debug) |
| { |
| fprintf (stderr, "getpkt (\"%s\"); [sending ack] \n", buf); |
| fflush (stderr); |
| } |
| |
| write (remote_desc, "+", 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); |
| } |
| } |
| |
| return bp - buf; |
| } |
| |
| void |
| write_ok (char *buf) |
| { |
| buf[0] = 'O'; |
| buf[1] = 'K'; |
| buf[2] = '\0'; |
| } |
| |
| void |
| write_enn (char *buf) |
| { |
| /* Some day, we should define the meanings of the error codes... */ |
| buf[0] = 'E'; |
| buf[1] = '0'; |
| buf[2] = '1'; |
| buf[3] = '\0'; |
| } |
| |
| #endif |
| |
| void |
| convert_int_to_ascii (const unsigned char *from, char *to, int n) |
| { |
| int nib; |
| int ch; |
| while (n--) |
| { |
| ch = *from++; |
| nib = ((ch & 0xf0) >> 4) & 0x0f; |
| *to++ = tohex (nib); |
| nib = ch & 0x0f; |
| *to++ = tohex (nib); |
| } |
| *to++ = 0; |
| } |
| |
| #ifndef IN_PROCESS_AGENT |
| |
| void |
| convert_ascii_to_int (const char *from, unsigned char *to, int n) |
| { |
| int nib1, nib2; |
| while (n--) |
| { |
| nib1 = fromhex (*from++); |
| nib2 = fromhex (*from++); |
| *to++ = (((nib1 & 0x0f) << 4) & 0xf0) | (nib2 & 0x0f); |
| } |
| } |
| |
| static char * |
| outreg (struct regcache *regcache, int regno, char *buf) |
| { |
| 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++ = ':'; |
| collect_register_as_string (regcache, regno, buf); |
| buf += 2 * register_size (regno); |
| *buf++ = ';'; |
| |
| return buf; |
| } |
| |
| void |
| new_thread_notify (int id) |
| { |
| char own_buf[256]; |
| |
| /* The `n' response is not yet part of the remote protocol. Do nothing. */ |
| if (1) |
| return; |
| |
| if (server_waiting == 0) |
| return; |
| |
| sprintf (own_buf, "n%x", id); |
| disable_async_io (); |
| putpkt (own_buf); |
| enable_async_io (); |
| } |
| |
| 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) |
| fprintf (stderr, "Writing resume reply for %s:%d\n\n", |
| target_pid_to_str (ptid), status->kind); |
| |
| switch (status->kind) |
| { |
| case TARGET_WAITKIND_STOPPED: |
| { |
| struct thread_info *saved_inferior; |
| const char **regp; |
| struct regcache *regcache; |
| |
| sprintf (buf, "T%02x", status->value.sig); |
| buf += strlen (buf); |
| |
| regp = gdbserver_expedite_regs; |
| |
| saved_inferior = current_inferior; |
| |
| current_inferior = find_thread_ptid (ptid); |
| |
| regcache = get_thread_regcache (current_inferior, 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++ = ';'; |
| } |
| |
| 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; |
| } |
| } |
| |
| void |
| decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr) |
| { |
| int i = 0, j = 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; |
| } |
| |
| for (j = 0; j < 4; j++) |
| { |
| if ((ch = from[i++]) == 0) |
| break; |
| *len_ptr = *len_ptr << 4; |
| *len_ptr |= fromhex (ch) & 0x0f; |
| } |
| } |
| |
| void |
| decode_M_packet (char *from, 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 = 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_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 = 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, 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, 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:"); |
| hexify (own_buf + strlen ("qSymbol:"), name, 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 = 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; |
| } |
| |
| 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 = xmalloc (sizeof (*sym)); |
| 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 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 = 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); |
| } |
| |
| #endif |