/* Remote target communications for serial-line targets in custom GDB protocol
- Copyright 1988, 91, 92, 93, 94, 95, 96, 97, 1998
+
+ Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
+ 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
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
-(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, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-/* Remote communication protocol.
-
- A debug packet whose contents are <data>
- is encapsulated for transmission in the form:
-
- $ <data> # CSUM1 CSUM2
-
- <data> must be ASCII alphanumeric and cannot include characters
- '$' or '#'. If <data> starts with two characters followed by
- ':', then the existing stubs interpret this as a sequence number.
-
- CSUM1 and CSUM2 are ascii hex representation of an 8-bit
- checksum of <data>, the most significant nibble is sent first.
- the hex digits 0-9,a-f are used.
-
- Receiver responds with:
-
- + - if CSUM is correct and ready for next packet
- - - if CSUM is incorrect
-
- <data> is as follows:
- Most values are encoded in ascii hex digits. Signal numbers are according
- to the numbering in target.h.
-
- Request Packet
-
- set thread Hct... Set thread for subsequent operations.
- c = 'c' for thread used in step and
- continue; t... can be -1 for all
- threads.
- c = 'g' for thread used in other
- operations. If zero, pick a thread,
- any thread.
- reply OK for success
- ENN for an error.
-
- read registers g
- reply XX....X Each byte of register data
- is described by two hex digits.
- Registers are in the internal order
- for GDB, and the bytes in a register
- are in the same order the machine uses.
- or ENN for an error.
-
- write regs GXX..XX Each byte of register data
- is described by two hex digits.
- reply OK for success
- ENN for an error
-
- write reg Pn...=r... Write register n... with value r...,
- which contains two hex digits for each
- byte in the register (target byte
- order).
- reply OK for success
- ENN for an error
- (not supported by all stubs).
-
- read mem mAA..AA,LLLL AA..AA is address, LLLL is length.
- reply XX..XX XX..XX is mem contents
- Can be fewer bytes than requested
- if able to read only part of the data.
- or ENN NN is errno
-
- write mem MAA..AA,LLLL:XX..XX
- AA..AA is address,
- LLLL is number of bytes,
- XX..XX is data
- reply OK for success
- ENN for an error (this includes the case
- where only part of the data was
- written).
-
- write mem XAA..AA,LLLL:XX..XX
- (binary) AA..AA is address,
- LLLL is number of bytes,
- XX..XX is binary data
- reply OK for success
- ENN for an error
-
- continue cAA..AA AA..AA is address to resume
- If AA..AA is omitted,
- resume at same address.
-
- step sAA..AA AA..AA is address to resume
- If AA..AA is omitted,
- resume at same address.
-
- continue with Csig;AA..AA Continue with signal sig (hex signal
- signal number). If ;AA..AA is omitted,
- resume at same address.
-
- step with Ssig;AA..AA Like 'C' but step not continue.
- signal
-
- last signal ? Reply the current reason for stopping.
- This is the same reply as is generated
- for step or cont : SAA where AA is the
- signal number.
-
- detach D Reply OK.
-
- There is no immediate reply to step or cont.
- The reply comes when the machine stops.
- It is SAA AA is the signal number.
-
- or... TAAn...:r...;n...:r...;n...:r...;
- AA = signal number
- n... = register number (hex)
- r... = register contents
- n... = `thread'
- r... = thread process ID. This is
- a hex integer.
- n... = other string not starting
- with valid hex digit.
- gdb should ignore this n,r pair
- and go on to the next. This way
- we can extend the protocol.
- or... WAA The process exited, and AA is
- the exit status. This is only
- applicable for certains sorts of
- targets.
- or... XAA The process terminated with signal
- AA.
- or (obsolete) NAA;tttttttt;dddddddd;bbbbbbbb
- AA = signal number
- tttttttt = address of symbol "_start"
- dddddddd = base of data section
- bbbbbbbb = base of bss section.
- Note: only used by Cisco Systems
- targets. The difference between this
- reply and the "qOffsets" query is that
- the 'N' packet may arrive spontaneously
- whereas the 'qOffsets' is a query
- initiated by the host debugger.
- or... OXX..XX XX..XX is hex encoding of ASCII data. This
- can happen at any time while the
- program is running and the debugger
- should continue to wait for
- 'W', 'T', etc.
-
- thread alive TXX Find out if the thread XX is alive.
- reply OK thread is still alive
- ENN thread is dead
-
- remote restart RXX Restart the remote server
-
- extended ops ! Use the extended remote protocol.
- Sticky -- only needs to be set once.
-
- kill request k
-
- toggle debug d toggle debug flag (see 386 & 68k stubs)
- reset r reset -- see sparc stub.
- reserved <other> On other requests, the stub should
- ignore the request and send an empty
- response ($#<checksum>). This way
- we can extend the protocol and GDB
- can tell whether the stub it is
- talking to uses the old or the new.
- search tAA:PP,MM Search backwards starting at address
- AA for a match with pattern PP and
- mask MM. PP and MM are 4 bytes.
- Not supported by all stubs.
-
- general query qXXXX Request info about XXXX.
- general set QXXXX=yyyy Set value of XXXX to yyyy.
- query sect offs qOffsets Get section offsets. Reply is
- Text=xxx;Data=yyy;Bss=zzz
-
- Responses can be run-length encoded to save space. A '*' means that
- the next character is an ASCII encoding giving a repeat count which
- stands for that many repititions of the character preceding the '*'.
- The encoding is n+29, yielding a printable character where n >=3
- (which is where rle starts to win). Don't use an n > 126.
-
- So
- "0* " means the same as "0000". */
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* See the GDB User Guide for details of the GDB remote protocol. */
#include "defs.h"
#include "gdb_string.h"
#include <ctype.h>
#include <fcntl.h>
-#include "frame.h"
#include "inferior.h"
#include "bfd.h"
#include "symfile.h"
#include "target.h"
-#include "wait.h"
-/*#include "terminal.h"*/
+/*#include "terminal.h" */
#include "gdbcmd.h"
#include "objfiles.h"
#include "gdb-stabs.h"
#include "gdbthread.h"
-
-#include "dcache.h"
+#include "remote.h"
+#include "regcache.h"
+#include "value.h"
+#include "gdb_assert.h"
#include <ctype.h>
+#include <sys/time.h>
#ifdef USG
#include <sys/types.h>
#endif
+#include "event-loop.h"
+#include "event-top.h"
+#include "inf-loop.h"
+
#include <signal.h>
#include "serial.h"
+#include "gdbcore.h" /* for exec_bfd */
+
+#include "remote-fileio.h"
+
/* Prototypes for local functions */
+static void cleanup_sigint_signal_handler (void *dummy);
+static void initialize_sigint_signal_handler (void);
+static int getpkt_sane (char *buf, long sizeof_buf, int forever);
+
+static void handle_remote_sigint (int);
+static void handle_remote_sigint_twice (int);
+static void async_remote_interrupt (gdb_client_data);
+void async_remote_interrupt_twice (gdb_client_data);
+
+static void build_remote_gdbarch_data (void);
+
+static void remote_files_info (struct target_ops *ignore);
+
+static int remote_xfer_memory (CORE_ADDR memaddr, char *myaddr,
+ int len, int should_write,
+ struct mem_attrib *attrib,
+ struct target_ops *target);
+
+static void remote_prepare_to_store (void);
+
+static void remote_fetch_registers (int regno);
+
+static void remote_resume (ptid_t ptid, int step,
+ enum target_signal siggnal);
+static void remote_async_resume (ptid_t ptid, int step,
+ enum target_signal siggnal);
+static int remote_start_remote (struct ui_out *uiout, void *dummy);
-static void build_remote_gdbarch_data PARAMS ((void));
+static void remote_open (char *name, int from_tty);
+static void remote_async_open (char *name, int from_tty);
-static int remote_write_bytes PARAMS ((CORE_ADDR memaddr,
- char *myaddr, int len));
+static void extended_remote_open (char *name, int from_tty);
+static void extended_remote_async_open (char *name, int from_tty);
-static int remote_read_bytes PARAMS ((CORE_ADDR memaddr,
- char *myaddr, int len));
+static void remote_open_1 (char *, int, struct target_ops *, int extended_p,
+ int async_p);
-static void remote_files_info PARAMS ((struct target_ops *ignore));
+static void remote_close (int quitting);
-static int remote_xfer_memory PARAMS ((CORE_ADDR memaddr, char * myaddr,
- int len, int should_write,
- struct target_ops * target));
+static void remote_store_registers (int regno);
-static void remote_prepare_to_store PARAMS ((void));
+static void remote_mourn (void);
+static void remote_async_mourn (void);
-static void remote_fetch_registers PARAMS ((int regno));
+static void extended_remote_restart (void);
-static void remote_resume PARAMS ((int pid, int step,
- enum target_signal siggnal));
+static void extended_remote_mourn (void);
-static int remote_start_remote PARAMS ((PTR));
+static void extended_remote_create_inferior (char *, char *, char **);
+static void extended_remote_async_create_inferior (char *, char *, char **);
-static void remote_open PARAMS ((char *name, int from_tty));
+static void remote_mourn_1 (struct target_ops *);
-static void extended_remote_open PARAMS ((char *name, int from_tty));
+static void remote_send (char *buf, long sizeof_buf);
-static void remote_open_1 PARAMS ((char *, int, struct target_ops *,
- int extended_p));
+static int readchar (int timeout);
-static void remote_close PARAMS ((int quitting));
+static ptid_t remote_wait (ptid_t ptid,
+ struct target_waitstatus *status);
+static ptid_t remote_async_wait (ptid_t ptid,
+ struct target_waitstatus *status);
-static void remote_store_registers PARAMS ((int regno));
+static void remote_kill (void);
+static void remote_async_kill (void);
-static void remote_mourn PARAMS ((void));
+static int tohex (int nib);
-static void extended_remote_restart PARAMS ((void));
+static void remote_detach (char *args, int from_tty);
-static void extended_remote_mourn PARAMS ((void));
+static void remote_interrupt (int signo);
-static void extended_remote_create_inferior PARAMS ((char *, char *, char **));
+static void remote_interrupt_twice (int signo);
-static void remote_mourn_1 PARAMS ((struct target_ops *));
+static void interrupt_query (void);
-static void remote_send PARAMS ((char *buf));
+static void set_thread (int, int);
-static int readchar PARAMS ((int timeout));
+static int remote_thread_alive (ptid_t);
-static int remote_wait PARAMS ((int pid, struct target_waitstatus * status));
+static void get_offsets (void);
-static void remote_kill PARAMS ((void));
+static long read_frame (char *buf, long sizeof_buf);
-static int tohex PARAMS ((int nib));
+static int remote_insert_breakpoint (CORE_ADDR, char *);
-static void remote_detach PARAMS ((char *args, int from_tty));
+static int remote_remove_breakpoint (CORE_ADDR, char *);
-static void remote_interrupt PARAMS ((int signo));
+static int hexnumlen (ULONGEST num);
-static void remote_interrupt_twice PARAMS ((int signo));
+static void init_remote_ops (void);
-static void interrupt_query PARAMS ((void));
+static void init_extended_remote_ops (void);
-static void set_thread PARAMS ((int, int));
+static void remote_stop (void);
-static int remote_thread_alive PARAMS ((int));
+static int ishex (int ch, int *val);
-static void get_offsets PARAMS ((void));
+static int stubhex (int ch);
-static int read_frame PARAMS ((char *));
+static int hexnumstr (char *, ULONGEST);
-static int remote_insert_breakpoint PARAMS ((CORE_ADDR, char *));
+static int hexnumnstr (char *, ULONGEST, int);
-static int remote_remove_breakpoint PARAMS ((CORE_ADDR, char *));
+static CORE_ADDR remote_address_masked (CORE_ADDR);
-static int hexnumlen PARAMS ((ULONGEST num));
+static void print_packet (char *);
-static void init_remote_ops PARAMS ((void));
+static unsigned long crc32 (unsigned char *, int, unsigned int);
-static void init_extended_remote_ops PARAMS ((void));
+static void compare_sections_command (char *, int);
-static void init_remote_cisco_ops PARAMS ((void));
+static void packet_command (char *, int);
-static struct target_ops remote_cisco_ops;
+static int stub_unpack_int (char *buff, int fieldlength);
-static void remote_stop PARAMS ((void));
+static ptid_t remote_current_thread (ptid_t oldptid);
-static int ishex PARAMS ((int ch, int *val));
+static void remote_find_new_threads (void);
-static int stubhex PARAMS ((int ch));
+static void record_currthread (int currthread);
-static int remote_query PARAMS ((int/*char*/, char *, char *, int *));
+static int fromhex (int a);
-static int hexnumstr PARAMS ((char *, ULONGEST));
+static int hex2bin (const char *hex, char *bin, int count);
-static CORE_ADDR remote_address_masked PARAMS ((CORE_ADDR));
+static int bin2hex (const char *bin, char *hex, int count);
-static void print_packet PARAMS ((char *));
+static int putpkt_binary (char *buf, int cnt);
-static unsigned long crc32 PARAMS ((unsigned char *, int, unsigned int));
+static void check_binary_download (CORE_ADDR addr);
-static void compare_sections_command PARAMS ((char *, int));
+struct packet_config;
-static void packet_command PARAMS ((char *, int));
+static void show_packet_config_cmd (struct packet_config *config);
-static int stub_unpack_int PARAMS ((char *buff, int fieldlength));
+static void update_packet_config (struct packet_config *config);
-static int remote_current_thread PARAMS ((int oldpid));
+void _initialize_remote (void);
-static void remote_find_new_threads PARAMS ((void));
+/* Description of the remote protocol. Strictly speaking, when the
+ target is open()ed, remote.c should create a per-target description
+ of the remote protocol using that target's architecture.
+ Unfortunately, the target stack doesn't include local state. For
+ the moment keep the information in the target's architecture
+ object. Sigh.. */
+
+struct packet_reg
+{
+ long offset; /* Offset into G packet. */
+ long regnum; /* GDB's internal register number. */
+ LONGEST pnum; /* Remote protocol register number. */
+ int in_g_packet; /* Always part of G packet. */
+ /* long size in bytes; == DEPRECATED_REGISTER_RAW_SIZE (regnum); at present. */
+ /* char *name; == REGISTER_NAME (regnum); at present. */
+};
+
+struct remote_state
+{
+ /* Description of the remote protocol registers. */
+ long sizeof_g_packet;
+
+ /* Description of the remote protocol registers indexed by REGNUM
+ (making an array of NUM_REGS + NUM_PSEUDO_REGS in size). */
+ struct packet_reg *regs;
+
+ /* This is the size (in chars) of the first response to the ``g''
+ packet. It is used as a heuristic when determining the maximum
+ size of memory-read and memory-write packets. A target will
+ typically only reserve a buffer large enough to hold the ``g''
+ packet. The size does not include packet overhead (headers and
+ trailers). */
+ long actual_register_packet_size;
+
+ /* This is the maximum size (in chars) of a non read/write packet.
+ It is also used as a cap on the size of read/write packets. */
+ long remote_packet_size;
+};
-static void record_currthread PARAMS ((int currthread));
-/* exported functions */
+/* Handle for retreving the remote protocol data from gdbarch. */
+static struct gdbarch_data *remote_gdbarch_data_handle;
+
+static struct remote_state *
+get_remote_state (void)
+{
+ return gdbarch_data (current_gdbarch, remote_gdbarch_data_handle);
+}
-extern int fromhex PARAMS ((int a));
+static void *
+init_remote_state (struct gdbarch *gdbarch)
+{
+ int regnum;
+ struct remote_state *rs = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_state);
-extern void getpkt PARAMS ((char *buf, int forever));
+ if (DEPRECATED_REGISTER_BYTES != 0)
+ rs->sizeof_g_packet = DEPRECATED_REGISTER_BYTES;
+ else
+ rs->sizeof_g_packet = 0;
-extern int putpkt PARAMS ((char *buf));
+ /* Assume a 1:1 regnum<->pnum table. */
+ rs->regs = GDBARCH_OBSTACK_CALLOC (gdbarch, NUM_REGS + NUM_PSEUDO_REGS,
+ struct packet_reg);
+ for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++)
+ {
+ struct packet_reg *r = &rs->regs[regnum];
+ r->pnum = regnum;
+ r->regnum = regnum;
+ r->offset = DEPRECATED_REGISTER_BYTE (regnum);
+ r->in_g_packet = (regnum < NUM_REGS);
+ /* ...name = REGISTER_NAME (regnum); */
+
+ /* Compute packet size by accumulating the size of all registers. */
+ if (DEPRECATED_REGISTER_BYTES == 0)
+ rs->sizeof_g_packet += register_size (current_gdbarch, regnum);
+ }
-static int putpkt_binary PARAMS ((char *buf, int cnt));
+ /* Default maximum number of characters in a packet body. Many
+ remote stubs have a hardwired buffer size of 400 bytes
+ (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
+ as the maximum packet-size to ensure that the packet and an extra
+ NUL character can always fit in the buffer. This stops GDB
+ trashing stubs that try to squeeze an extra NUL into what is
+ already a full buffer (As of 1999-12-04 that was most stubs. */
+ rs->remote_packet_size = 400 - 1;
+
+ /* Should rs->sizeof_g_packet needs more space than the
+ default, adjust the size accordingly. Remember that each byte is
+ encoded as two characters. 32 is the overhead for the packet
+ header / footer. NOTE: cagney/1999-10-26: I suspect that 8
+ (``$NN:G...#NN'') is a better guess, the below has been padded a
+ little. */
+ if (rs->sizeof_g_packet > ((rs->remote_packet_size - 32) / 2))
+ rs->remote_packet_size = (rs->sizeof_g_packet * 2 + 32);
+
+ /* This one is filled in when a ``g'' packet is received. */
+ rs->actual_register_packet_size = 0;
+
+ return rs;
+}
-void remote_console_output PARAMS ((char *));
+static struct packet_reg *
+packet_reg_from_regnum (struct remote_state *rs, long regnum)
+{
+ if (regnum < 0 && regnum >= NUM_REGS + NUM_PSEUDO_REGS)
+ return NULL;
+ else
+ {
+ struct packet_reg *r = &rs->regs[regnum];
+ gdb_assert (r->regnum == regnum);
+ return r;
+ }
+}
-static void check_binary_download PARAMS ((CORE_ADDR addr));
+static struct packet_reg *
+packet_reg_from_pnum (struct remote_state *rs, LONGEST pnum)
+{
+ int i;
+ for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
+ {
+ struct packet_reg *r = &rs->regs[i];
+ if (r->pnum == pnum)
+ return r;
+ }
+ return NULL;
+}
-/* Define the target subroutine names */
+/* FIXME: graces/2002-08-08: These variables should eventually be
+ bound to an instance of the target object (as in gdbarch-tdep()),
+ when such a thing exists. */
-void open_remote_target PARAMS ((char *, int, struct target_ops *, int));
+/* This is set to the data address of the access causing the target
+ to stop for a watchpoint. */
+static CORE_ADDR remote_watch_data_address;
-void _initialize_remote PARAMS ((void));
+/* This is non-zero if taregt stopped for a watchpoint. */
+static int remote_stopped_by_watchpoint_p;
-/* */
static struct target_ops remote_ops;
static struct target_ops extended_remote_ops;
-/* This was 5 seconds, which is a long time to sit and wait.
- Unless this is going though some terminal server or multiplexer or
- other form of hairy serial connection, I would think 2 seconds would
- be plenty. */
+/* Temporary target ops. Just like the remote_ops and
+ extended_remote_ops, but with asynchronous support. */
+static struct target_ops remote_async_ops;
+
+static struct target_ops extended_async_remote_ops;
+
+/* FIXME: cagney/1999-09-23: Even though getpkt was called with
+ ``forever'' still use the normal timeout mechanism. This is
+ currently used by the ASYNC code to guarentee that target reads
+ during the initial connect always time-out. Once getpkt has been
+ modified to return a timeout indication and, in turn
+ remote_wait()/wait_for_inferior() have gained a timeout parameter
+ this can go away. */
+static int wait_forever_enabled_p = 1;
-/* Changed to allow option to set timeout value.
- was static int remote_timeout = 2; */
-extern int remote_timeout;
/* This variable chooses whether to send a ^C or a break when the user
requests program interruption. Although ^C is usually what remote
/* Descriptor for I/O to remote machine. Initialize it to NULL so that
remote_open knows that we don't have a file open when the program
starts. */
-static serial_t remote_desc = NULL;
-
-/* This is set by the target (thru the 'S' message)
- to denote that the target is in kernel mode. */
-static int cisco_kernel_mode = 0;
-
-/* This variable (available to the user via "set remotebinarydownload")
- dictates whether downloads are sent in binary (via the 'X' packet).
- We assume that the stub can, and attempt to do it. This will be cleared if
- the stub does not understand it. This switch is still needed, though
- in cases when the packet is supported in the stub, but the connection
- does not allow it (i.e., 7-bit serial connection only). */
-static int remote_binary_download = 1;
-
-/* Have we already checked whether binary downloads work? */
-static int remote_binary_checked;
-
-/* Maximum number of bytes to read/write at once. The value here
- is chosen to fill up a packet (the headers account for the 32). */
-#define MAXBUFBYTES(N) (((N)-32)/2)
-
-/* Having this larger than 400 causes us to be incompatible with m68k-stub.c
- and i386-stub.c. Normally, no one would notice because it only matters
- for writing large chunks of memory (e.g. in downloads). Also, this needs
- to be more than 400 if required to hold the registers (see below, where
- we round it up based on REGISTER_BYTES). */
-/* Round up PBUFSIZ to hold all the registers, at least. */
-#define PBUFSIZ ((REGISTER_BYTES > MAXBUFBYTES (400)) \
- ? (REGISTER_BYTES * 2 + 32) \
- : 400)
-
-
-/* This variable sets the number of bytes to be written to the target
- in a single packet. Normally PBUFSIZ is satisfactory, but some
- targets need smaller values (perhaps because the receiving end
- is slow). */
-
-static int remote_write_size;
+static struct serial *remote_desc = NULL;
/* This variable sets the number of bits in an address that are to be
sent in a memory ("M" or "m") packet. Normally, after stripping
static int remote_address_size;
-/* This is the size (in chars) of the first response to the `g' command. This
- is used to limit the size of the memory read and write commands to prevent
- stub buffers from overflowing. The size does not include headers and
- trailers, it is only the payload size. */
-
-static int remote_register_buf_size = 0;
-
-/* Should we try the 'P' request? If this is set to one when the stub
- doesn't support 'P', the only consequence is some unnecessary traffic. */
-static int stub_supports_P = 1;
-
-/* These are pointers to hook functions that may be set in order to
- modify resume/wait behavior for a particular architecture. */
+/* Tempoary to track who currently owns the terminal. See
+ target_async_terminal_* for more details. */
-void (*target_resume_hook) PARAMS ((void));
-void (*target_wait_loop_hook) PARAMS ((void));
+static int remote_async_terminal_ours_p;
\f
+/* User configurable variables for the number of characters in a
+ memory read/write packet. MIN ((rs->remote_packet_size),
+ rs->sizeof_g_packet) is the default. Some targets need smaller
+ values (fifo overruns, et.al.) and some users need larger values
+ (speed up transfers). The variables ``preferred_*'' (the user
+ request), ``current_*'' (what was actually set) and ``forced_*''
+ (Positive - a soft limit, negative - a hard limit). */
+
+struct memory_packet_config
+{
+ char *name;
+ long size;
+ int fixed_p;
+};
-/* These are the threads which we last sent to the remote system.
- -1 for all or -2 for not sent yet. */
-static int general_thread;
-static int continue_thread;
-
-/* Call this function as a result of
- 1) A halt indication (T packet) containing a thread id
- 2) A direct query of currthread
- 3) Successful execution of set thread
- */
+/* Compute the current size of a read/write packet. Since this makes
+ use of ``actual_register_packet_size'' the computation is dynamic. */
-static void
-record_currthread (currthread)
- int currthread;
+static long
+get_memory_packet_size (struct memory_packet_config *config)
{
- general_thread = currthread;
-
- /* If this is a new thread, add it to GDB's thread list.
- If we leave it up to WFI to do this, bad things will happen. */
- if (!in_thread_list (currthread))
+ struct remote_state *rs = get_remote_state ();
+ /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
+ law?) that some hosts don't cope very well with large alloca()
+ calls. Eventually the alloca() code will be replaced by calls to
+ xmalloc() and make_cleanups() allowing this restriction to either
+ be lifted or removed. */
+#ifndef MAX_REMOTE_PACKET_SIZE
+#define MAX_REMOTE_PACKET_SIZE 16384
+#endif
+ /* NOTE: 16 is just chosen at random. */
+#ifndef MIN_REMOTE_PACKET_SIZE
+#define MIN_REMOTE_PACKET_SIZE 16
+#endif
+ long what_they_get;
+ if (config->fixed_p)
+ {
+ if (config->size <= 0)
+ what_they_get = MAX_REMOTE_PACKET_SIZE;
+ else
+ what_they_get = config->size;
+ }
+ else
{
- add_thread (currthread);
- printf_filtered ("[New %s]\n", target_pid_to_str (currthread));
+ what_they_get = (rs->remote_packet_size);
+ /* Limit the packet to the size specified by the user. */
+ if (config->size > 0
+ && what_they_get > config->size)
+ what_they_get = config->size;
+ /* Limit it to the size of the targets ``g'' response. */
+ if ((rs->actual_register_packet_size) > 0
+ && what_they_get > (rs->actual_register_packet_size))
+ what_they_get = (rs->actual_register_packet_size);
}
+ if (what_they_get > MAX_REMOTE_PACKET_SIZE)
+ what_they_get = MAX_REMOTE_PACKET_SIZE;
+ if (what_they_get < MIN_REMOTE_PACKET_SIZE)
+ what_they_get = MIN_REMOTE_PACKET_SIZE;
+ return what_they_get;
}
-#define MAGIC_NULL_PID 42000
+/* Update the size of a read/write packet. If they user wants
+ something really big then do a sanity check. */
static void
-set_thread (th, gen)
- int th;
- int gen;
+set_memory_packet_size (char *args, struct memory_packet_config *config)
{
- char *buf = alloca (PBUFSIZ);
- int state = gen ? general_thread : continue_thread;
-
- if (state == th)
- return;
-
- buf[0] = 'H';
- buf[1] = gen ? 'g' : 'c';
- if (th == MAGIC_NULL_PID)
+ int fixed_p = config->fixed_p;
+ long size = config->size;
+ if (args == NULL)
+ error ("Argument required (integer, `fixed' or `limited').");
+ else if (strcmp (args, "hard") == 0
+ || strcmp (args, "fixed") == 0)
+ fixed_p = 1;
+ else if (strcmp (args, "soft") == 0
+ || strcmp (args, "limit") == 0)
+ fixed_p = 0;
+ else
{
- buf[2] = '0';
- buf[3] = '\0';
+ char *end;
+ size = strtoul (args, &end, 0);
+ if (args == end)
+ error ("Invalid %s (bad syntax).", config->name);
+#if 0
+ /* Instead of explicitly capping the size of a packet to
+ MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
+ instead allowed to set the size to something arbitrarily
+ large. */
+ if (size > MAX_REMOTE_PACKET_SIZE)
+ error ("Invalid %s (too large).", config->name);
+#endif
}
- else if (th < 0)
- sprintf (&buf[2], "-%x", -th);
- else
- sprintf (&buf[2], "%x", th);
- putpkt (buf);
- getpkt (buf, 0);
- if (gen)
- general_thread = th;
- else
- continue_thread = th;
+ /* Extra checks? */
+ if (fixed_p && !config->fixed_p)
+ {
+ if (! query ("The target may not be able to correctly handle a %s\n"
+ "of %ld bytes. Change the packet size? ",
+ config->name, size))
+ error ("Packet size not changed.");
+ }
+ /* Update the config. */
+ config->fixed_p = fixed_p;
+ config->size = size;
}
-\f
-/* Return nonzero if the thread TH is still alive on the remote system. */
-static int
-remote_thread_alive (tid)
- int tid;
+static void
+show_memory_packet_size (struct memory_packet_config *config)
{
- char buf[16];
-
- if (tid < 0)
- sprintf (buf, "T-%08x", -tid);
+ printf_filtered ("The %s is %ld. ", config->name, config->size);
+ if (config->fixed_p)
+ printf_filtered ("Packets are fixed at %ld bytes.\n",
+ get_memory_packet_size (config));
else
- sprintf (buf, "T%08x", tid);
- putpkt (buf);
- getpkt (buf, 0);
- return (buf[0] == 'O' && buf[1] == 'K');
+ printf_filtered ("Packets are limited to %ld bytes.\n",
+ get_memory_packet_size (config));
}
-/* About these extended threadlist and threadinfo packets. They are
- variable length packets but, the fields within them are often fixed
- length. They are redundent enough to send over UDP as is the
- remote protocol in general. There is a matching unit test module
- in libstub. */
+static struct memory_packet_config memory_write_packet_config =
+{
+ "memory-write-packet-size",
+};
-#define OPAQUETHREADBYTES 8
+static void
+set_memory_write_packet_size (char *args, int from_tty)
+{
+ set_memory_packet_size (args, &memory_write_packet_config);
+}
-/* a 64 bit opaque identifier */
-typedef unsigned char threadref[OPAQUETHREADBYTES];
+static void
+show_memory_write_packet_size (char *args, int from_tty)
+{
+ show_memory_packet_size (&memory_write_packet_config);
+}
-/* WARNING: This threadref data structure comes from the remote O.S., libstub
- protocol encoding, and remote.c. it is not particularly changable */
+static long
+get_memory_write_packet_size (void)
+{
+ return get_memory_packet_size (&memory_write_packet_config);
+}
-/* Right now, the internal structure is int. We want it to be bigger.
- Plan to fix this.
- */
+static struct memory_packet_config memory_read_packet_config =
+{
+ "memory-read-packet-size",
+};
-typedef int gdb_threadref; /* internal GDB thread reference */
+static void
+set_memory_read_packet_size (char *args, int from_tty)
+{
+ set_memory_packet_size (args, &memory_read_packet_config);
+}
-/* gdb_ext_thread_info is an internal GDB data structure which is
- equivalint to the reply of the remote threadinfo packet */
+static void
+show_memory_read_packet_size (char *args, int from_tty)
+{
+ show_memory_packet_size (&memory_read_packet_config);
+}
-struct gdb_ext_thread_info
+static long
+get_memory_read_packet_size (void)
{
- threadref threadid; /* External form of thread reference */
- int active; /* Has state interesting to GDB? , regs, stack */
- char display[256]; /* Brief state display, name, blocked/syspended */
- char shortname[32]; /* To be used to name threads */
- char more_display[256]; /* Long info, statistics, queue depth, whatever */
-};
+ struct remote_state *rs = get_remote_state ();
+ long size = get_memory_packet_size (&memory_read_packet_config);
+ /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
+ extra buffer size argument before the memory read size can be
+ increased beyond (rs->remote_packet_size). */
+ if (size > (rs->remote_packet_size))
+ size = (rs->remote_packet_size);
+ return size;
+}
-/* The volume of remote transfers can be limited by submitting
- a mask containing bits specifying the desired information.
- Use a union of these values as the 'selection' parameter to
- get_thread_info. FIXME: Make these TAG names more thread specific.
- */
+\f
+/* Generic configuration support for packets the stub optionally
+ supports. Allows the user to specify the use of the packet as well
+ as allowing GDB to auto-detect support in the remote stub. */
-#define TAG_THREADID 1
-#define TAG_EXISTS 2
-#define TAG_DISPLAY 4
-#define TAG_THREADNAME 8
-#define TAG_MOREDISPLAY 16
+enum packet_support
+ {
+ PACKET_SUPPORT_UNKNOWN = 0,
+ PACKET_ENABLE,
+ PACKET_DISABLE
+ };
-#define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES*2)
+struct packet_config
+ {
+ char *name;
+ char *title;
+ enum auto_boolean detect;
+ enum packet_support support;
+ };
-char *unpack_varlen_hex PARAMS ((char *buff, int *result));
+/* Analyze a packet's return value and update the packet config
+ accordingly. */
+
+enum packet_result
+{
+ PACKET_ERROR,
+ PACKET_OK,
+ PACKET_UNKNOWN
+};
-static char *unpack_nibble PARAMS ((char *buf, int *val));
+static void
+update_packet_config (struct packet_config *config)
+{
+ switch (config->detect)
+ {
+ case AUTO_BOOLEAN_TRUE:
+ config->support = PACKET_ENABLE;
+ break;
+ case AUTO_BOOLEAN_FALSE:
+ config->support = PACKET_DISABLE;
+ break;
+ case AUTO_BOOLEAN_AUTO:
+ config->support = PACKET_SUPPORT_UNKNOWN;
+ break;
+ }
+}
-static char *pack_nibble PARAMS ((char *buf, int nibble));
+static void
+show_packet_config_cmd (struct packet_config *config)
+{
+ char *support = "internal-error";
+ switch (config->support)
+ {
+ case PACKET_ENABLE:
+ support = "enabled";
+ break;
+ case PACKET_DISABLE:
+ support = "disabled";
+ break;
+ case PACKET_SUPPORT_UNKNOWN:
+ support = "unknown";
+ break;
+ }
+ switch (config->detect)
+ {
+ case AUTO_BOOLEAN_AUTO:
+ printf_filtered ("Support for remote protocol `%s' (%s) packet is auto-detected, currently %s.\n",
+ config->name, config->title, support);
+ break;
+ case AUTO_BOOLEAN_TRUE:
+ case AUTO_BOOLEAN_FALSE:
+ printf_filtered ("Support for remote protocol `%s' (%s) packet is currently %s.\n",
+ config->name, config->title, support);
+ break;
+ }
+}
-static char *pack_hex_byte PARAMS ((char *pkt, int/*unsigned char*/ byte));
+static void
+add_packet_config_cmd (struct packet_config *config,
+ char *name,
+ char *title,
+ cmd_sfunc_ftype *set_func,
+ cmd_sfunc_ftype *show_func,
+ struct cmd_list_element **set_remote_list,
+ struct cmd_list_element **show_remote_list,
+ int legacy)
+{
+ struct cmd_list_element *set_cmd;
+ struct cmd_list_element *show_cmd;
+ char *set_doc;
+ char *show_doc;
+ char *cmd_name;
+ config->name = name;
+ config->title = title;
+ config->detect = AUTO_BOOLEAN_AUTO;
+ config->support = PACKET_SUPPORT_UNKNOWN;
+ xasprintf (&set_doc, "Set use of remote protocol `%s' (%s) packet",
+ name, title);
+ xasprintf (&show_doc, "Show current use of remote protocol `%s' (%s) packet",
+ name, title);
+ /* set/show TITLE-packet {auto,on,off} */
+ xasprintf (&cmd_name, "%s-packet", title);
+ add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
+ &config->detect, set_doc, show_doc,
+ set_func, show_func,
+ set_remote_list, show_remote_list);
+ /* set/show remote NAME-packet {auto,on,off} -- legacy */
+ if (legacy)
+ {
+ char *legacy_name;
+ xasprintf (&legacy_name, "%s-packet", name);
+ add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
+ set_remote_list);
+ add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
+ show_remote_list);
+ }
+}
-static char *unpack_byte PARAMS ((char *buf, int *value));
+static enum packet_result
+packet_ok (const char *buf, struct packet_config *config)
+{
+ if (buf[0] != '\0')
+ {
+ /* The stub recognized the packet request. Check that the
+ operation succeeded. */
+ switch (config->support)
+ {
+ case PACKET_SUPPORT_UNKNOWN:
+ if (remote_debug)
+ fprintf_unfiltered (gdb_stdlog,
+ "Packet %s (%s) is supported\n",
+ config->name, config->title);
+ config->support = PACKET_ENABLE;
+ break;
+ case PACKET_DISABLE:
+ internal_error (__FILE__, __LINE__,
+ "packet_ok: attempt to use a disabled packet");
+ break;
+ case PACKET_ENABLE:
+ break;
+ }
+ if (buf[0] == 'O' && buf[1] == 'K' && buf[2] == '\0')
+ /* "OK" - definitly OK. */
+ return PACKET_OK;
+ if (buf[0] == 'E'
+ && isxdigit (buf[1]) && isxdigit (buf[2])
+ && buf[3] == '\0')
+ /* "Enn" - definitly an error. */
+ return PACKET_ERROR;
+ /* The packet may or may not be OK. Just assume it is */
+ return PACKET_OK;
+ }
+ else
+ {
+ /* The stub does not support the packet. */
+ switch (config->support)
+ {
+ case PACKET_ENABLE:
+ if (config->detect == AUTO_BOOLEAN_AUTO)
+ /* If the stub previously indicated that the packet was
+ supported then there is a protocol error.. */
+ error ("Protocol error: %s (%s) conflicting enabled responses.",
+ config->name, config->title);
+ else
+ /* The user set it wrong. */
+ error ("Enabled packet %s (%s) not recognized by stub",
+ config->name, config->title);
+ break;
+ case PACKET_SUPPORT_UNKNOWN:
+ if (remote_debug)
+ fprintf_unfiltered (gdb_stdlog,
+ "Packet %s (%s) is NOT supported\n",
+ config->name, config->title);
+ config->support = PACKET_DISABLE;
+ break;
+ case PACKET_DISABLE:
+ break;
+ }
+ return PACKET_UNKNOWN;
+ }
+}
-static char *pack_int PARAMS ((char *buf, int value));
+/* Should we try the 'vCont' (descriptive resume) request? */
+static struct packet_config remote_protocol_vcont;
-static char *unpack_int PARAMS ((char *buf, int *value));
+static void
+set_remote_protocol_vcont_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ update_packet_config (&remote_protocol_vcont);
+}
-static char *unpack_string PARAMS ((char *src, char *dest, int length));
+static void
+show_remote_protocol_vcont_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ show_packet_config_cmd (&remote_protocol_vcont);
+}
-static char *pack_threadid PARAMS ((char *pkt, threadref *id));
+/* Should we try the 'qSymbol' (target symbol lookup service) request? */
+static struct packet_config remote_protocol_qSymbol;
-static char *unpack_threadid PARAMS ((char *inbuf, threadref *id));
+static void
+set_remote_protocol_qSymbol_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ update_packet_config (&remote_protocol_qSymbol);
+}
-void int_to_threadref PARAMS ((threadref *id, int value));
+static void
+show_remote_protocol_qSymbol_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ show_packet_config_cmd (&remote_protocol_qSymbol);
+}
-static int threadref_to_int PARAMS ((threadref *ref));
+/* Should we try the 'e' (step over range) request? */
+static struct packet_config remote_protocol_e;
-static void copy_threadref PARAMS ((threadref *dest, threadref *src));
+static void
+set_remote_protocol_e_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ update_packet_config (&remote_protocol_e);
+}
-static int threadmatch PARAMS ((threadref *dest, threadref *src));
+static void
+show_remote_protocol_e_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ show_packet_config_cmd (&remote_protocol_e);
+}
-static char *pack_threadinfo_request PARAMS ((char *pkt, int mode,
- threadref *id));
-static int remote_unpack_thread_info_response PARAMS ((char *pkt,
- threadref *expectedref,
- struct gdb_ext_thread_info *info));
+/* Should we try the 'E' (step over range / w signal #) request? */
+static struct packet_config remote_protocol_E;
+static void
+set_remote_protocol_E_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ update_packet_config (&remote_protocol_E);
+}
-static int remote_get_threadinfo PARAMS ((threadref *threadid,
- int fieldset, /*TAG mask */
- struct gdb_ext_thread_info *info));
+static void
+show_remote_protocol_E_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ show_packet_config_cmd (&remote_protocol_E);
+}
-static int adapt_remote_get_threadinfo PARAMS ((gdb_threadref *ref,
- int selection,
- struct gdb_ext_thread_info *info));
-static char *pack_threadlist_request PARAMS ((char *pkt, int startflag,
- int threadcount,
- threadref *nextthread));
+/* Should we try the 'P' (set register) request? */
-static int parse_threadlist_response PARAMS ((char *pkt,
- int result_limit,
- threadref *original_echo,
- threadref *resultlist,
- int *doneflag));
+static struct packet_config remote_protocol_P;
-static int remote_get_threadlist PARAMS ((int startflag,
- threadref *nextthread,
- int result_limit,
- int *done,
- int *result_count,
- threadref *threadlist));
+static void
+set_remote_protocol_P_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ update_packet_config (&remote_protocol_P);
+}
-typedef int (*rmt_thread_action) (threadref *ref, void *context);
+static void
+show_remote_protocol_P_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ show_packet_config_cmd (&remote_protocol_P);
+}
-static int remote_threadlist_iterator PARAMS ((rmt_thread_action stepfunction,
- void *context, int looplimit));
+/* Should we try one of the 'Z' requests? */
-static int remote_newthread_step PARAMS ((threadref *ref, void *context));
+enum Z_packet_type
+{
+ Z_PACKET_SOFTWARE_BP,
+ Z_PACKET_HARDWARE_BP,
+ Z_PACKET_WRITE_WP,
+ Z_PACKET_READ_WP,
+ Z_PACKET_ACCESS_WP,
+ NR_Z_PACKET_TYPES
+};
-/* encode 64 bits in 16 chars of hex */
+static struct packet_config remote_protocol_Z[NR_Z_PACKET_TYPES];
-static const char hexchars[] = "0123456789abcdef";
+/* FIXME: Instead of having all these boiler plate functions, the
+ command callback should include a context argument. */
-static int
-ishex (ch, val)
- int ch;
- int *val;
+static void
+set_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
{
- 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;
+ update_packet_config (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]);
}
-static int
-stubhex (ch)
- int ch;
+static void
+show_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
{
- if (ch >= 'a' && ch <= 'f')
- return ch - 'a' + 10;
- if (ch >= '0' && ch <= '9')
- return ch - '0';
- if (ch >= 'A' && ch <= 'F')
- return ch - 'A' + 10;
- return -1;
+ show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]);
}
-static int
-stub_unpack_int (buff, fieldlength)
- char *buff;
- int fieldlength;
+static void
+set_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ update_packet_config (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]);
+}
+
+static void
+show_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]);
+}
+
+static void
+set_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ update_packet_config (&remote_protocol_Z[Z_PACKET_WRITE_WP]);
+}
+
+static void
+show_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP]);
+}
+
+static void
+set_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ update_packet_config (&remote_protocol_Z[Z_PACKET_READ_WP]);
+}
+
+static void
+show_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP]);
+}
+
+static void
+set_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ update_packet_config (&remote_protocol_Z[Z_PACKET_ACCESS_WP]);
+}
+
+static void
+show_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP]);
+}
+
+/* For compatibility with older distributions. Provide a ``set remote
+ Z-packet ...'' command that updates all the Z packet types. */
+
+static enum auto_boolean remote_Z_packet_detect;
+
+static void
+set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ int i;
+ for (i = 0; i < NR_Z_PACKET_TYPES; i++)
+ {
+ remote_protocol_Z[i].detect = remote_Z_packet_detect;
+ update_packet_config (&remote_protocol_Z[i]);
+ }
+}
+
+static void
+show_remote_protocol_Z_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ int i;
+ for (i = 0; i < NR_Z_PACKET_TYPES; i++)
+ {
+ show_packet_config_cmd (&remote_protocol_Z[i]);
+ }
+}
+
+/* Should we try the 'X' (remote binary download) packet?
+
+ This variable (available to the user via "set remote X-packet")
+ dictates whether downloads are sent in binary (via the 'X' packet).
+ We assume that the stub can, and attempt to do it. This will be
+ cleared if the stub does not understand it. This switch is still
+ needed, though in cases when the packet is supported in the stub,
+ but the connection does not allow it (i.e., 7-bit serial connection
+ only). */
+
+static struct packet_config remote_protocol_binary_download;
+
+/* Should we try the 'ThreadInfo' query packet?
+
+ This variable (NOT available to the user: auto-detect only!)
+ determines whether GDB will use the new, simpler "ThreadInfo"
+ query or the older, more complex syntax for thread queries.
+ This is an auto-detect variable (set to true at each connect,
+ and set to false when the target fails to recognize it). */
+
+static int use_threadinfo_query;
+static int use_threadextra_query;
+
+static void
+set_remote_protocol_binary_download_cmd (char *args,
+ int from_tty,
+ struct cmd_list_element *c)
+{
+ update_packet_config (&remote_protocol_binary_download);
+}
+
+static void
+show_remote_protocol_binary_download_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ show_packet_config_cmd (&remote_protocol_binary_download);
+}
+
+/* Should we try the 'qPart:auxv' (target auxiliary vector read) request? */
+static struct packet_config remote_protocol_qPart_auxv;
+
+static void
+set_remote_protocol_qPart_auxv_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ update_packet_config (&remote_protocol_qPart_auxv);
+}
+
+static void
+show_remote_protocol_qPart_auxv_packet_cmd (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ show_packet_config_cmd (&remote_protocol_qPart_auxv);
+}
+
+
+/* Tokens for use by the asynchronous signal handlers for SIGINT */
+static void *sigint_remote_twice_token;
+static void *sigint_remote_token;
+
+/* These are pointers to hook functions that may be set in order to
+ modify resume/wait behavior for a particular architecture. */
+
+void (*target_resume_hook) (void);
+void (*target_wait_loop_hook) (void);
+\f
+
+
+/* These are the threads which we last sent to the remote system.
+ -1 for all or -2 for not sent yet. */
+static int general_thread;
+static int continue_thread;
+
+/* Call this function as a result of
+ 1) A halt indication (T packet) containing a thread id
+ 2) A direct query of currthread
+ 3) Successful execution of set thread
+ */
+
+static void
+record_currthread (int currthread)
+{
+ general_thread = currthread;
+
+ /* If this is a new thread, add it to GDB's thread list.
+ If we leave it up to WFI to do this, bad things will happen. */
+ if (!in_thread_list (pid_to_ptid (currthread)))
+ {
+ add_thread (pid_to_ptid (currthread));
+ ui_out_text (uiout, "[New ");
+ ui_out_text (uiout, target_pid_to_str (pid_to_ptid (currthread)));
+ ui_out_text (uiout, "]\n");
+ }
+}
+
+#define MAGIC_NULL_PID 42000
+
+static void
+set_thread (int th, int gen)
+{
+ struct remote_state *rs = get_remote_state ();
+ char *buf = alloca (rs->remote_packet_size);
+ int state = gen ? general_thread : continue_thread;
+
+ if (state == th)
+ return;
+
+ buf[0] = 'H';
+ buf[1] = gen ? 'g' : 'c';
+ if (th == MAGIC_NULL_PID)
+ {
+ buf[2] = '0';
+ buf[3] = '\0';
+ }
+ else if (th < 0)
+ sprintf (&buf[2], "-%x", -th);
+ else
+ sprintf (&buf[2], "%x", th);
+ putpkt (buf);
+ getpkt (buf, (rs->remote_packet_size), 0);
+ if (gen)
+ general_thread = th;
+ else
+ continue_thread = th;
+}
+\f
+/* Return nonzero if the thread TH is still alive on the remote system. */
+
+static int
+remote_thread_alive (ptid_t ptid)
+{
+ int tid = PIDGET (ptid);
+ char buf[16];
+
+ if (tid < 0)
+ sprintf (buf, "T-%08x", -tid);
+ else
+ sprintf (buf, "T%08x", tid);
+ putpkt (buf);
+ getpkt (buf, sizeof (buf), 0);
+ return (buf[0] == 'O' && buf[1] == 'K');
+}
+
+/* About these extended threadlist and threadinfo packets. They are
+ variable length packets but, the fields within them are often fixed
+ length. They are redundent enough to send over UDP as is the
+ remote protocol in general. There is a matching unit test module
+ in libstub. */
+
+#define OPAQUETHREADBYTES 8
+
+/* a 64 bit opaque identifier */
+typedef unsigned char threadref[OPAQUETHREADBYTES];
+
+/* WARNING: This threadref data structure comes from the remote O.S., libstub
+ protocol encoding, and remote.c. it is not particularly changable */
+
+/* Right now, the internal structure is int. We want it to be bigger.
+ Plan to fix this.
+ */
+
+typedef int gdb_threadref; /* internal GDB thread reference */
+
+/* gdb_ext_thread_info is an internal GDB data structure which is
+ equivalint to the reply of the remote threadinfo packet */
+
+struct gdb_ext_thread_info
+ {
+ threadref threadid; /* External form of thread reference */
+ int active; /* Has state interesting to GDB? , regs, stack */
+ char display[256]; /* Brief state display, name, blocked/syspended */
+ char shortname[32]; /* To be used to name threads */
+ char more_display[256]; /* Long info, statistics, queue depth, whatever */
+ };
+
+/* The volume of remote transfers can be limited by submitting
+ a mask containing bits specifying the desired information.
+ Use a union of these values as the 'selection' parameter to
+ get_thread_info. FIXME: Make these TAG names more thread specific.
+ */
+
+#define TAG_THREADID 1
+#define TAG_EXISTS 2
+#define TAG_DISPLAY 4
+#define TAG_THREADNAME 8
+#define TAG_MOREDISPLAY 16
+
+#define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES*2)
+
+char *unpack_varlen_hex (char *buff, ULONGEST *result);
+
+static char *unpack_nibble (char *buf, int *val);
+
+static char *pack_nibble (char *buf, int nibble);
+
+static char *pack_hex_byte (char *pkt, int /*unsigned char */ byte);
+
+static char *unpack_byte (char *buf, int *value);
+
+static char *pack_int (char *buf, int value);
+
+static char *unpack_int (char *buf, int *value);
+
+static char *unpack_string (char *src, char *dest, int length);
+
+static char *pack_threadid (char *pkt, threadref * id);
+
+static char *unpack_threadid (char *inbuf, threadref * id);
+
+void int_to_threadref (threadref * id, int value);
+
+static int threadref_to_int (threadref * ref);
+
+static void copy_threadref (threadref * dest, threadref * src);
+
+static int threadmatch (threadref * dest, threadref * src);
+
+static char *pack_threadinfo_request (char *pkt, int mode, threadref * id);
+
+static int remote_unpack_thread_info_response (char *pkt,
+ threadref * expectedref,
+ struct gdb_ext_thread_info
+ *info);
+
+
+static int remote_get_threadinfo (threadref * threadid, int fieldset, /*TAG mask */
+ struct gdb_ext_thread_info *info);
+
+static char *pack_threadlist_request (char *pkt, int startflag,
+ int threadcount,
+ threadref * nextthread);
+
+static int parse_threadlist_response (char *pkt,
+ int result_limit,
+ threadref * original_echo,
+ threadref * resultlist, int *doneflag);
+
+static int remote_get_threadlist (int startflag,
+ threadref * nextthread,
+ int result_limit,
+ int *done,
+ int *result_count, threadref * threadlist);
+
+typedef int (*rmt_thread_action) (threadref * ref, void *context);
+
+static int remote_threadlist_iterator (rmt_thread_action stepfunction,
+ void *context, int looplimit);
+
+static int remote_newthread_step (threadref * ref, void *context);
+
+/* encode 64 bits in 16 chars of hex */
+
+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;
+}
+
+static int
+stubhex (int ch)
+{
+ if (ch >= 'a' && ch <= 'f')
+ return ch - 'a' + 10;
+ if (ch >= '0' && ch <= '9')
+ return ch - '0';
+ if (ch >= 'A' && ch <= 'F')
+ return ch - 'A' + 10;
+ return -1;
+}
+
+static int
+stub_unpack_int (char *buff, int fieldlength)
{
int nibble;
int retval = 0;
}
char *
-unpack_varlen_hex (buff, result)
- char *buff; /* packet to parse */
- int *result;
+unpack_varlen_hex (char *buff, /* packet to parse */
+ ULONGEST *result)
{
int nibble;
int retval = 0;
}
static char *
-unpack_nibble (buf, val)
- char *buf;
- int *val;
+unpack_nibble (char *buf, int *val)
{
ishex (*buf++, val);
return buf;
}
static char *
-pack_nibble (buf, nibble)
- char *buf;
- int nibble;
+pack_nibble (char *buf, int nibble)
{
*buf++ = hexchars[(nibble & 0x0f)];
return buf;
}
static char *
-pack_hex_byte (pkt, byte)
- char *pkt;
- int byte;
+pack_hex_byte (char *pkt, int byte)
{
*pkt++ = hexchars[(byte >> 4) & 0xf];
*pkt++ = hexchars[(byte & 0xf)];
}
static char *
-unpack_byte (buf, value)
- char *buf;
- int *value;
+unpack_byte (char *buf, int *value)
{
*value = stub_unpack_int (buf, 2);
return buf + 2;
}
static char *
-pack_int (buf, value)
- char *buf;
- int value;
+pack_int (char *buf, int value)
{
buf = pack_hex_byte (buf, (value >> 24) & 0xff);
buf = pack_hex_byte (buf, (value >> 16) & 0xff);
}
static char *
-unpack_int (buf, value)
- char *buf;
- int *value;
+unpack_int (char *buf, int *value)
{
*value = stub_unpack_int (buf, 8);
return buf + 8;
}
-#if 0 /* currently unused, uncomment when needed */
-static char *pack_string PARAMS ((char *pkt, char *string));
+#if 0 /* currently unused, uncomment when needed */
+static char *pack_string (char *pkt, char *string);
static char *
-pack_string (pkt, string)
- char *pkt;
- char *string;
+pack_string (char *pkt, char *string)
{
char ch;
int len;
#endif /* 0 (unused) */
static char *
-unpack_string (src, dest, length)
- char *src;
- char *dest;
- int length;
+unpack_string (char *src, char *dest, int length)
{
while (length--)
*dest++ = *src++;
}
static char *
-pack_threadid (pkt, id)
- char *pkt;
- threadref *id;
+pack_threadid (char *pkt, threadref *id)
{
char *limit;
unsigned char *altid;
static char *
-unpack_threadid (inbuf, id)
- char *inbuf;
- threadref *id;
+unpack_threadid (char *inbuf, threadref *id)
{
char *altref;
char *limit = inbuf + BUF_THREAD_ID_SIZE;
function. */
void
-int_to_threadref (id, value)
- threadref *id;
- int value;
+int_to_threadref (threadref *id, int value)
{
unsigned char *scan;
}
static int
-threadref_to_int (ref)
- threadref *ref;
+threadref_to_int (threadref *ref)
{
int i, value = 0;
unsigned char *scan;
}
static void
-copy_threadref (dest, src)
- threadref *dest;
- threadref *src;
+copy_threadref (threadref *dest, threadref *src)
{
int i;
unsigned char *csrc, *cdest;
}
static int
-threadmatch (dest, src)
- threadref *dest;
- threadref *src;
+threadmatch (threadref *dest, threadref *src)
{
/* things are broken right now, so just assume we got a match */
#if 0
}
/*
- threadid:1, # always request threadid
- context_exists:2,
- display:4,
- unique_name:8,
- more_display:16
-*/
+ threadid:1, # always request threadid
+ context_exists:2,
+ display:4,
+ unique_name:8,
+ more_display:16
+ */
/* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
static char *
-pack_threadinfo_request (pkt, mode, id)
- char *pkt;
- int mode;
- threadref *id;
+pack_threadinfo_request (char *pkt, int mode, threadref *id)
{
*pkt++ = 'q'; /* Info Query */
*pkt++ = 'P'; /* process or thread info */
/* Tagging the fields allows us to request specific fields and to
add more fields as time goes by */
-#define TAG_THREADID 1 /* Echo the thread identifier */
-#define TAG_EXISTS 2 /* Is this process defined enough to
- fetch registers and its stack */
-#define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
-#define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is */
-#define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
- the process*/
+#define TAG_THREADID 1 /* Echo the thread identifier */
+#define TAG_EXISTS 2 /* Is this process defined enough to
+ fetch registers and its stack */
+#define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
+#define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is */
+#define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
+ the process */
static int
-remote_unpack_thread_info_response (pkt, expectedref, info)
- char *pkt;
- threadref *expectedref;
- struct gdb_ext_thread_info *info;
+remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
+ struct gdb_ext_thread_info *info)
{
+ struct remote_state *rs = get_remote_state ();
int mask, length;
unsigned int tag;
threadref ref;
- char *limit = pkt + PBUFSIZ; /* plausable parsing limit */
+ char *limit = pkt + (rs->remote_packet_size); /* plausable parsing limit */
int retval = 1;
/* info->threadid = 0; FIXME: implement zero_threadref */
/* Loop on tagged fields , try to bail if somthing goes wrong */
- while ((pkt < limit) && mask && *pkt) /* packets are terminated with nulls */
+ while ((pkt < limit) && mask && *pkt) /* packets are terminated with nulls */
{
pkt = unpack_int (pkt, &tag); /* tag */
pkt = unpack_byte (pkt, &length); /* length */
}
static int
-remote_get_threadinfo (threadid, fieldset, info)
- threadref *threadid;
- int fieldset; /* TAG mask */
- struct gdb_ext_thread_info *info;
+remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
+ struct gdb_ext_thread_info *info)
{
+ struct remote_state *rs = get_remote_state ();
int result;
- char *threadinfo_pkt = alloca (PBUFSIZ);
+ char *threadinfo_pkt = alloca (rs->remote_packet_size);
pack_threadinfo_request (threadinfo_pkt, fieldset, threadid);
putpkt (threadinfo_pkt);
- getpkt (threadinfo_pkt, 0);
+ getpkt (threadinfo_pkt, (rs->remote_packet_size), 0);
result = remote_unpack_thread_info_response (threadinfo_pkt + 2, threadid,
info);
return result;
}
-/* Unfortunately, 61 bit thread-ids are bigger than the internal
- representation of a threadid. */
-
-static int
-adapt_remote_get_threadinfo (ref, selection, info)
- gdb_threadref *ref;
- int selection;
- struct gdb_ext_thread_info *info;
-{
- threadref lclref;
-
- int_to_threadref (&lclref, *ref);
- return remote_get_threadinfo (&lclref, selection, info);
-}
-
/* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
static char *
-pack_threadlist_request (pkt, startflag, threadcount, nextthread)
- char *pkt;
- int startflag;
- int threadcount;
- threadref *nextthread;
+pack_threadlist_request (char *pkt, int startflag, int threadcount,
+ threadref *nextthread)
{
*pkt++ = 'q'; /* info query packet */
*pkt++ = 'L'; /* Process LIST or threadLIST request */
/* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
static int
-parse_threadlist_response (pkt, result_limit, original_echo, resultlist,
- doneflag)
- char *pkt;
- int result_limit;
- threadref *original_echo;
- threadref *resultlist;
- int *doneflag;
+parse_threadlist_response (char *pkt, int result_limit,
+ threadref *original_echo, threadref *resultlist,
+ int *doneflag)
{
+ struct remote_state *rs = get_remote_state ();
char *limit;
int count, resultcount, done;
resultcount = 0;
/* Assume the 'q' and 'M chars have been stripped. */
- limit = pkt + (PBUFSIZ - BUF_THREAD_ID_SIZE); /* done parse past here */
+ limit = pkt + ((rs->remote_packet_size) - BUF_THREAD_ID_SIZE); /* done parse past here */
pkt = unpack_byte (pkt, &count); /* count field */
pkt = unpack_nibble (pkt, &done);
/* The first threadid is the argument threadid. */
}
static int
-remote_get_threadlist (startflag, nextthread, result_limit,
- done, result_count, threadlist)
- int startflag;
- threadref *nextthread;
- int result_limit;
- int *done;
- int *result_count;
- threadref *threadlist;
-
+remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
+ int *done, int *result_count, threadref *threadlist)
{
+ struct remote_state *rs = get_remote_state ();
static threadref echo_nextthread;
- char *threadlist_packet = alloca (PBUFSIZ);
- char *t_response = alloca (PBUFSIZ);
+ char *threadlist_packet = alloca (rs->remote_packet_size);
+ char *t_response = alloca (rs->remote_packet_size);
int result = 1;
/* Trancate result limit to be smaller than the packet size */
- if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= PBUFSIZ)
- result_limit = (PBUFSIZ / BUF_THREAD_ID_SIZE) - 2;
+ if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= (rs->remote_packet_size))
+ result_limit = ((rs->remote_packet_size) / BUF_THREAD_ID_SIZE) - 2;
pack_threadlist_request (threadlist_packet,
startflag, result_limit, nextthread);
putpkt (threadlist_packet);
- getpkt (t_response, 0);
+ getpkt (t_response, (rs->remote_packet_size), 0);
*result_count =
parse_threadlist_response (t_response + 2, result_limit, &echo_nextthread,
#define MAXTHREADLISTRESULTS 32
static int
-remote_threadlist_iterator (stepfunction, context, looplimit)
- rmt_thread_action stepfunction;
- void *context;
- int looplimit;
+remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
+ int looplimit)
{
int done, i, result_count;
int startflag = 1;
}
static int
-remote_newthread_step (ref, context)
- threadref *ref;
- void *context;
+remote_newthread_step (threadref *ref, void *context)
{
- int pid;
+ ptid_t ptid;
- pid = threadref_to_int (ref);
- if (!in_thread_list (pid))
- add_thread (pid);
+ ptid = pid_to_ptid (threadref_to_int (ref));
+
+ if (!in_thread_list (ptid))
+ add_thread (ptid);
return 1; /* continue iterator */
}
#define CRAZY_MAX_THREADS 1000
-static int
-remote_current_thread (oldpid)
- int oldpid;
+static ptid_t
+remote_current_thread (ptid_t oldpid)
{
- char *buf = alloca (PBUFSIZ);
+ struct remote_state *rs = get_remote_state ();
+ char *buf = alloca (rs->remote_packet_size);
putpkt ("qC");
- getpkt (buf, 0);
+ getpkt (buf, (rs->remote_packet_size), 0);
if (buf[0] == 'Q' && buf[1] == 'C')
- return strtol (&buf[2], NULL, 16);
+ return pid_to_ptid (strtol (&buf[2], NULL, 16));
else
return oldpid;
}
-/* Find new threads for info threads command. */
+/* Find new threads for info threads command.
+ * Original version, using John Metzler's thread protocol.
+ */
static void
-remote_find_new_threads ()
+remote_find_new_threads (void)
{
- remote_threadlist_iterator (remote_newthread_step, 0,
- CRAZY_MAX_THREADS);
- if (inferior_pid == MAGIC_NULL_PID) /* ack ack ack */
- inferior_pid = remote_current_thread (inferior_pid);
+ remote_threadlist_iterator (remote_newthread_step, 0,
+ CRAZY_MAX_THREADS);
+ if (PIDGET (inferior_ptid) == MAGIC_NULL_PID) /* ack ack ack */
+ inferior_ptid = remote_current_thread (inferior_ptid);
}
+/*
+ * Find all threads for info threads command.
+ * Uses new thread protocol contributed by Cisco.
+ * Falls back and attempts to use the older method (above)
+ * if the target doesn't respond to the new method.
+ */
+
static void
remote_threads_info (void)
{
- char *buf = alloca (PBUFSIZ);
+ struct remote_state *rs = get_remote_state ();
+ char *buf = alloca (rs->remote_packet_size);
char *bufp;
int tid;
if (remote_desc == 0) /* paranoia */
error ("Command can only be used when connected to the remote target.");
- putpkt ("qfThreadInfo");
- getpkt (bufp = buf, 0);
- if (bufp[0] == '\0') /* q packet not recognized! */
- { /* try old jmetzler method */
- remote_find_new_threads ();
- return;
- }
- else /* try new 'q' method */
- while (*bufp++ == 'm') /* reply contains one or more TID */
- {
- do {
- tid = strtol(bufp, &bufp, 16);
- if (tid != 0 && !in_thread_list (tid))
- add_thread (tid);
- } while (*bufp++ == ','); /* comma-separated list */
- putpkt ("qsThreadInfo");
- getpkt (bufp = buf, 0);
- }
+ if (use_threadinfo_query)
+ {
+ putpkt ("qfThreadInfo");
+ bufp = buf;
+ getpkt (bufp, (rs->remote_packet_size), 0);
+ if (bufp[0] != '\0') /* q packet recognized */
+ {
+ while (*bufp++ == 'm') /* reply contains one or more TID */
+ {
+ do
+ {
+ tid = strtol (bufp, &bufp, 16);
+ if (tid != 0 && !in_thread_list (pid_to_ptid (tid)))
+ add_thread (pid_to_ptid (tid));
+ }
+ while (*bufp++ == ','); /* comma-separated list */
+ putpkt ("qsThreadInfo");
+ bufp = buf;
+ getpkt (bufp, (rs->remote_packet_size), 0);
+ }
+ return; /* done */
+ }
+ }
+
+ /* Else fall back to old method based on jmetzler protocol. */
+ use_threadinfo_query = 0;
+ remote_find_new_threads ();
+ return;
+}
+
+/*
+ * Collect a descriptive string about the given thread.
+ * The target may say anything it wants to about the thread
+ * (typically info about its blocked / runnable state, name, etc.).
+ * This string will appear in the info threads display.
+ *
+ * Optional: targets are not required to implement this function.
+ */
+
+static char *
+remote_threads_extra_info (struct thread_info *tp)
+{
+ struct remote_state *rs = get_remote_state ();
+ int result;
+ int set;
+ threadref id;
+ struct gdb_ext_thread_info threadinfo;
+ static char display_buf[100]; /* arbitrary... */
+ char *bufp = alloca (rs->remote_packet_size);
+ int n = 0; /* position in display_buf */
+
+ if (remote_desc == 0) /* paranoia */
+ internal_error (__FILE__, __LINE__,
+ "remote_threads_extra_info");
+
+ if (use_threadextra_query)
+ {
+ sprintf (bufp, "qThreadExtraInfo,%x", PIDGET (tp->ptid));
+ putpkt (bufp);
+ getpkt (bufp, (rs->remote_packet_size), 0);
+ if (bufp[0] != 0)
+ {
+ n = min (strlen (bufp) / 2, sizeof (display_buf));
+ result = hex2bin (bufp, display_buf, n);
+ display_buf [result] = '\0';
+ return display_buf;
+ }
+ }
+
+ /* If the above query fails, fall back to the old method. */
+ use_threadextra_query = 0;
+ set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
+ | TAG_MOREDISPLAY | TAG_DISPLAY;
+ int_to_threadref (&id, PIDGET (tp->ptid));
+ if (remote_get_threadinfo (&id, set, &threadinfo))
+ if (threadinfo.active)
+ {
+ if (*threadinfo.shortname)
+ n += sprintf(&display_buf[0], " Name: %s,", threadinfo.shortname);
+ if (*threadinfo.display)
+ n += sprintf(&display_buf[n], " State: %s,", threadinfo.display);
+ if (*threadinfo.more_display)
+ n += sprintf(&display_buf[n], " Priority: %s",
+ threadinfo.more_display);
+
+ if (n > 0)
+ {
+ /* for purely cosmetic reasons, clear up trailing commas */
+ if (',' == display_buf[n-1])
+ display_buf[n-1] = ' ';
+ return display_buf;
+ }
+ }
+ return NULL;
}
\f
+
/* Restart the remote side; this is an extended protocol operation. */
static void
-extended_remote_restart ()
+extended_remote_restart (void)
{
- char *buf = alloca (PBUFSIZ);
+ struct remote_state *rs = get_remote_state ();
+ char *buf = alloca (rs->remote_packet_size);
/* Send the restart command; for reasons I don't understand the
remote side really expects a number after the "R". */
/* Now query for status so this looks just like we restarted
gdbserver from scratch. */
putpkt ("?");
- getpkt (buf, 0);
+ getpkt (buf, (rs->remote_packet_size), 0);
}
\f
/* Clean up connection to a remote debugger. */
-/* ARGSUSED */
static void
-remote_close (quitting)
- int quitting;
+remote_close (int quitting)
{
if (remote_desc)
- SERIAL_CLOSE (remote_desc);
+ serial_close (remote_desc);
remote_desc = NULL;
}
/* Query the remote side for the text, data and bss offsets. */
static void
-get_offsets ()
+get_offsets (void)
{
- char *buf = alloca (PBUFSIZ);
+ struct remote_state *rs = get_remote_state ();
+ char *buf = alloca (rs->remote_packet_size);
char *ptr;
int lose;
CORE_ADDR text_addr, data_addr, bss_addr;
putpkt ("qOffsets");
- getpkt (buf, 0);
+ getpkt (buf, (rs->remote_packet_size), 0);
if (buf[0] == '\000')
return; /* Return silently. Stub doesn't support
if (symfile_objfile == NULL)
return;
- offs = alloca (sizeof (struct section_offsets)
- + symfile_objfile->num_sections
- * sizeof (offs->offsets));
+ offs = ((struct section_offsets *)
+ alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
memcpy (offs, symfile_objfile->section_offsets,
- sizeof (struct section_offsets)
- + symfile_objfile->num_sections
- * sizeof (offs->offsets));
+ SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
- ANOFFSET (offs, SECT_OFF_TEXT) = text_addr;
+ offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
/* This is a temporary kludge to force data and bss to use the same offsets
because that's what nlmconv does now. The real solution requires changes
to the stub and remote.c that I don't have time to do right now. */
- ANOFFSET (offs, SECT_OFF_DATA) = data_addr;
- ANOFFSET (offs, SECT_OFF_BSS) = data_addr;
+ offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
+ offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
objfile_relocate (symfile_objfile, offs);
}
-/*
- * Cisco version of section offsets:
- *
- * Instead of having GDB query the target for the section offsets,
- * Cisco lets the target volunteer the information! It's also in
- * a different format, so here are the functions that will decode
- * a section offset packet from a Cisco target.
- */
-
-/*
- * Function: remote_cisco_section_offsets
- *
- * Returns: zero for success, non-zero for failure
- */
-
-static int
-remote_cisco_section_offsets (text_addr, data_addr, bss_addr,
- text_offs, data_offs, bss_offs)
- bfd_vma text_addr;
- bfd_vma data_addr;
- bfd_vma bss_addr;
- bfd_signed_vma * text_offs;
- bfd_signed_vma * data_offs;
- bfd_signed_vma * bss_offs;
-{
- bfd_vma text_base, data_base, bss_base;
- struct minimal_symbol *start;
- asection *sect;
- bfd * abfd;
- int len;
- char *p;
-
- if (symfile_objfile == NULL)
- return -1; /* no can do nothin' */
-
- start = lookup_minimal_symbol ("_start", NULL, NULL);
- if (start == NULL)
- return -1; /* Can't find "_start" symbol */
-
- data_base = bss_base = 0;
- text_base = SYMBOL_VALUE_ADDRESS (start);
-
- abfd = symfile_objfile->obfd;
- for (sect = abfd->sections;
- sect != 0;
- sect = sect->next)
- {
- p = (unsigned char *) bfd_get_section_name (abfd, sect);
- len = strlen (p);
- if (strcmp (p + len - 4, "data") == 0) /* ends in "data" */
- if (data_base == 0 ||
- data_base > bfd_get_section_vma (abfd, sect))
- data_base = bfd_get_section_vma (abfd, sect);
- if (strcmp (p + len - 3, "bss") == 0) /* ends in "bss" */
- if (bss_base == 0 ||
- bss_base > bfd_get_section_vma (abfd, sect))
- bss_base = bfd_get_section_vma (abfd, sect);
- }
- *text_offs = text_addr - text_base;
- *data_offs = data_addr - data_base;
- *bss_offs = bss_addr - bss_base;
- if (remote_debug)
- {
- char tmp[128];
-
- sprintf (tmp, "VMA: text = 0x");
- sprintf_vma (tmp + strlen (tmp), text_addr);
- sprintf (tmp + strlen (tmp), " data = 0x");
- sprintf_vma (tmp + strlen (tmp), data_addr);
- sprintf (tmp + strlen (tmp), " bss = 0x");
- sprintf_vma (tmp + strlen (tmp), bss_addr);
- fprintf_filtered (gdb_stdlog, tmp);
- fprintf_filtered (gdb_stdlog,
- "Reloc offset: text = 0x%x data = 0x%x bss = 0x%x\n",
- (long) *text_offs, (long) *data_offs, (long) *bss_offs);
- }
-
- return 0;
-}
-
-/*
- * Function: remote_cisco_objfile_relocate
- *
- * Relocate the symbol file for a remote target.
- */
-
-static void
-remote_cisco_objfile_relocate (text_off, data_off, bss_off)
- bfd_signed_vma text_off;
- bfd_signed_vma data_off;
- bfd_signed_vma bss_off;
-{
- struct section_offsets *offs;
-
- if (text_off != 0 || data_off != 0 || bss_off != 0)
- {
- /* FIXME: This code assumes gdb-stabs.h is being used; it's
- broken for xcoff, dwarf, sdb-coff, etc. But there is no
- simple canonical representation for this stuff. */
-
- offs = ((struct section_offsets *)
- alloca (sizeof (struct section_offsets)
- + (symfile_objfile->num_sections
- * sizeof (offs->offsets))));
-
- memcpy (offs, symfile_objfile->section_offsets,
- (sizeof (struct section_offsets)
- + (symfile_objfile->num_sections
- * sizeof (offs->offsets))));
-
- ANOFFSET (offs, SECT_OFF_TEXT) = text_off;
- ANOFFSET (offs, SECT_OFF_DATA) = data_off;
- ANOFFSET (offs, SECT_OFF_BSS) = bss_off;
-
- /* First call the standard objfile_relocate. */
- objfile_relocate (symfile_objfile, offs);
-
- /* Now we need to fix up the section entries already attached to
- the exec target. These entries will control memory transfers
- from the exec file. */
-
- exec_set_section_offsets (text_off, data_off, bss_off);
- }
-}
-
/* Stub for catch_errors. */
static int
-remote_start_remote_dummy (dummy)
- char *dummy;
+remote_start_remote_dummy (struct ui_out *uiout, void *dummy)
{
start_remote (); /* Initialize gdb process mechanisms */
+ /* NOTE: Return something >=0. A -ve value is reserved for
+ catch_exceptions. */
return 1;
}
static int
-remote_start_remote (dummy)
- PTR dummy;
+remote_start_remote (struct ui_out *uiout, void *dummy)
{
- immediate_quit = 1; /* Allow user to interrupt it */
+ immediate_quit++; /* Allow user to interrupt it */
/* Ack any packet which the remote side has already sent. */
- SERIAL_WRITE (remote_desc, "+", 1);
+ serial_write (remote_desc, "+", 1);
/* Let the stub know that we want it to return the thread. */
set_thread (-1, 0);
- inferior_pid = remote_current_thread (inferior_pid);
+ inferior_ptid = remote_current_thread (inferior_ptid);
get_offsets (); /* Get text, data & bss offsets */
putpkt ("?"); /* initiate a query from remote machine */
- immediate_quit = 0;
+ immediate_quit--;
- return remote_start_remote_dummy (dummy);
+ /* NOTE: See comment above in remote_start_remote_dummy(). This
+ function returns something >=0. */
+ return remote_start_remote_dummy (uiout, dummy);
}
/* Open a connection to a remote debugger.
NAME is the filename used for communication. */
static void
-remote_open (name, from_tty)
- char *name;
- int from_tty;
+remote_open (char *name, int from_tty)
+{
+ remote_open_1 (name, from_tty, &remote_ops, 0, 0);
+}
+
+/* Just like remote_open, but with asynchronous support. */
+static void
+remote_async_open (char *name, int from_tty)
{
- remote_open_1 (name, from_tty, &remote_ops, 0);
+ remote_open_1 (name, from_tty, &remote_async_ops, 0, 1);
}
/* Open a connection to a remote debugger using the extended
remote gdb protocol. NAME is the filename used for communication. */
static void
-extended_remote_open (name, from_tty)
- char *name;
- int from_tty;
+extended_remote_open (char *name, int from_tty)
{
- remote_open_1 (name, from_tty, &extended_remote_ops, 1/*extended_p*/);
+ remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */,
+ 0 /* async_p */);
+}
+
+/* Just like extended_remote_open, but with asynchronous support. */
+static void
+extended_remote_async_open (char *name, int from_tty)
+{
+ remote_open_1 (name, from_tty, &extended_async_remote_ops,
+ 1 /*extended_p */, 1 /* async_p */);
}
/* Generic code for opening a connection to a remote target. */
-static DCACHE *remote_dcache;
+static void
+init_all_packet_configs (void)
+{
+ int i;
+ update_packet_config (&remote_protocol_e);
+ update_packet_config (&remote_protocol_E);
+ update_packet_config (&remote_protocol_P);
+ update_packet_config (&remote_protocol_qSymbol);
+ update_packet_config (&remote_protocol_vcont);
+ for (i = 0; i < NR_Z_PACKET_TYPES; i++)
+ update_packet_config (&remote_protocol_Z[i]);
+ /* Force remote_write_bytes to check whether target supports binary
+ downloading. */
+ update_packet_config (&remote_protocol_binary_download);
+ update_packet_config (&remote_protocol_qPart_auxv);
+}
+
+/* Symbol look-up. */
static void
-remote_open_1 (name, from_tty, target, extended_p)
- char *name;
- int from_tty;
- struct target_ops *target;
- int extended_p;
+remote_check_symbols (struct objfile *objfile)
{
+ struct remote_state *rs = get_remote_state ();
+ char *msg, *reply, *tmp;
+ struct minimal_symbol *sym;
+ int end;
+
+ if (remote_protocol_qSymbol.support == PACKET_DISABLE)
+ return;
+
+ msg = alloca (rs->remote_packet_size);
+ reply = alloca (rs->remote_packet_size);
+
+ /* Invite target to request symbol lookups. */
+
+ putpkt ("qSymbol::");
+ getpkt (reply, (rs->remote_packet_size), 0);
+ packet_ok (reply, &remote_protocol_qSymbol);
+
+ while (strncmp (reply, "qSymbol:", 8) == 0)
+ {
+ tmp = &reply[8];
+ end = hex2bin (tmp, msg, strlen (tmp) / 2);
+ msg[end] = '\0';
+ sym = lookup_minimal_symbol (msg, NULL, NULL);
+ if (sym == NULL)
+ sprintf (msg, "qSymbol::%s", &reply[8]);
+ else
+ sprintf (msg, "qSymbol:%s:%s",
+ paddr_nz (SYMBOL_VALUE_ADDRESS (sym)),
+ &reply[8]);
+ putpkt (msg);
+ getpkt (reply, (rs->remote_packet_size), 0);
+ }
+}
+
+static struct serial *
+remote_serial_open (char *name)
+{
+ static int udp_warning = 0;
+
+ /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
+ of in ser-tcp.c, because it is the remote protocol assuming that the
+ serial connection is reliable and not the serial connection promising
+ to be. */
+ if (!udp_warning && strncmp (name, "udp:", 4) == 0)
+ {
+ warning ("The remote protocol may be unreliable over UDP.");
+ warning ("Some events may be lost, rendering further debugging "
+ "impossible.");
+ udp_warning = 1;
+ }
+
+ return serial_open (name);
+}
+
+static void
+remote_open_1 (char *name, int from_tty, struct target_ops *target,
+ int extended_p, int async_p)
+{
+ int ex;
+ struct remote_state *rs = get_remote_state ();
if (name == 0)
- error ("To open a remote debug connection, you need to specify what\n\
-serial device is attached to the remote system (e.g. /dev/ttya).");
+ error ("To open a remote debug connection, you need to specify what\n"
+ "serial device is attached to the remote system\n"
+ "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
+
+ /* See FIXME above */
+ if (!async_p)
+ wait_forever_enabled_p = 1;
target_preopen (from_tty);
unpush_target (target);
- remote_dcache = dcache_init (remote_read_bytes, remote_write_bytes);
-
- remote_desc = SERIAL_OPEN (name);
+ remote_desc = remote_serial_open (name);
if (!remote_desc)
perror_with_name (name);
if (baud_rate != -1)
{
- if (SERIAL_SETBAUDRATE (remote_desc, baud_rate))
+ if (serial_setbaudrate (remote_desc, baud_rate))
{
- SERIAL_CLOSE (remote_desc);
+ /* The requested speed could not be set. Error out to
+ top level after closing remote_desc. Take care to
+ set remote_desc to NULL to avoid closing remote_desc
+ more than once. */
+ serial_close (remote_desc);
+ remote_desc = NULL;
perror_with_name (name);
}
}
-
- SERIAL_RAW (remote_desc);
+ serial_raw (remote_desc);
/* If there is something sitting in the buffer we might take it as a
response to a command, which would be bad. */
- SERIAL_FLUSH_INPUT (remote_desc);
+ serial_flush_input (remote_desc);
if (from_tty)
{
puts_filtered (name);
puts_filtered ("\n");
}
- push_target (target); /* Switch to using remote target now */
+ push_target (target); /* Switch to using remote target now */
- /* Start out by trying the 'P' request to set registers. We set
- this each time that we open a new target so that if the user
- switches from one stub to another, we can (if the target is
- closed and reopened) cope. */
- stub_supports_P = 1;
+ init_all_packet_configs ();
- general_thread = -2;
+ general_thread = -2;
continue_thread = -2;
- /* Force remote_write_bytes to check whether target supports
- binary downloading. */
- remote_binary_checked = 0;
+ /* Probe for ability to use "ThreadInfo" query, as required. */
+ use_threadinfo_query = 1;
+ use_threadextra_query = 1;
/* Without this, some commands which require an active target (such
as kill) won't work. This variable serves (at least) double duty
be split out into seperate variables, especially since GDB will
someday have a notion of debugging several processes. */
- inferior_pid = MAGIC_NULL_PID;
- /* Start the remote connection; if error (0), discard this target.
- In particular, if the user quits, be sure to discard it
- (we'd be in an inconsistent state otherwise). */
- if (!catch_errors (remote_start_remote, NULL,
- "Couldn't establish connection to remote target\n",
- RETURN_MASK_ALL))
+ inferior_ptid = pid_to_ptid (MAGIC_NULL_PID);
+
+ if (async_p)
+ {
+ /* With this target we start out by owning the terminal. */
+ remote_async_terminal_ours_p = 1;
+
+ /* FIXME: cagney/1999-09-23: During the initial connection it is
+ assumed that the target is already ready and able to respond to
+ requests. Unfortunately remote_start_remote() eventually calls
+ wait_for_inferior() with no timeout. wait_forever_enabled_p gets
+ around this. Eventually a mechanism that allows
+ wait_for_inferior() to expect/get timeouts will be
+ implemented. */
+ wait_forever_enabled_p = 0;
+ }
+
+#ifdef SOLIB_CREATE_INFERIOR_HOOK
+ /* First delete any symbols previously loaded from shared libraries. */
+ no_shared_libraries (NULL, 0);
+#endif
+
+ /* Start the remote connection. If error() or QUIT, discard this
+ target (we'd otherwise be in an inconsistent state) and then
+ propogate the error on up the exception chain. This ensures that
+ the caller doesn't stumble along blindly assuming that the
+ function succeeded. The CLI doesn't have this problem but other
+ UI's, such as MI do.
+
+ FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
+ this function should return an error indication letting the
+ caller restore the previous state. Unfortunately the command
+ ``target remote'' is directly wired to this function making that
+ impossible. On a positive note, the CLI side of this problem has
+ been fixed - the function set_cmd_context() makes it possible for
+ all the ``target ....'' commands to share a common callback
+ function. See cli-dump.c. */
+ ex = catch_exceptions (uiout,
+ remote_start_remote, NULL,
+ "Couldn't establish connection to remote"
+ " target\n",
+ RETURN_MASK_ALL);
+ if (ex < 0)
{
pop_target ();
- return;
+ if (async_p)
+ wait_forever_enabled_p = 1;
+ throw_exception (ex);
}
+ if (async_p)
+ wait_forever_enabled_p = 1;
+
if (extended_p)
{
- /* tell the remote that we're using the extended protocol. */
- char *buf = alloca (PBUFSIZ);
+ /* Tell the remote that we are using the extended protocol. */
+ char *buf = alloca (rs->remote_packet_size);
putpkt ("!");
- getpkt (buf, 0);
+ getpkt (buf, (rs->remote_packet_size), 0);
+ }
+#ifdef SOLIB_CREATE_INFERIOR_HOOK
+ /* FIXME: need a master target_open vector from which all
+ remote_opens can be called, so that stuff like this can
+ go there. Failing that, the following code must be copied
+ to the open function for any remote target that wants to
+ support svr4 shared libraries. */
+
+ /* Set up to detect and load shared libraries. */
+ if (exec_bfd) /* No use without an exec file. */
+ {
+ SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid));
+ remote_check_symbols (symfile_objfile);
}
+#endif
}
/* This takes a program previously attached to and detaches it. After
die when it hits one. */
static void
-remote_detach (args, from_tty)
- char *args;
- int from_tty;
+remote_detach (char *args, int from_tty)
{
- char *buf = alloca (PBUFSIZ);
+ struct remote_state *rs = get_remote_state ();
+ char *buf = alloca (rs->remote_packet_size);
if (args)
error ("Argument given to \"detach\" when remotely debugging.");
/* Tell the remote target to detach. */
strcpy (buf, "D");
- remote_send (buf);
+ remote_send (buf, (rs->remote_packet_size));
+
+ /* Unregister the file descriptor from the event loop. */
+ if (target_is_async_p ())
+ serial_async (remote_desc, NULL, 0);
- pop_target ();
+ target_mourn_inferior ();
+ if (from_tty)
+ puts_filtered ("Ending remote debugging.\n");
+}
+
+/* Same as remote_detach, but don't send the "D" packet; just disconnect. */
+
+static void
+remote_disconnect (char *args, int from_tty)
+{
+ struct remote_state *rs = get_remote_state ();
+ char *buf = alloca (rs->remote_packet_size);
+
+ if (args)
+ error ("Argument given to \"detach\" when remotely debugging.");
+
+ /* Unregister the file descriptor from the event loop. */
+ if (target_is_async_p ())
+ serial_async (remote_desc, NULL, 0);
+
+ target_mourn_inferior ();
if (from_tty)
puts_filtered ("Ending remote debugging.\n");
}
/* Convert hex digit A to a number. */
-int
-fromhex (a)
- int a;
+static int
+fromhex (int a)
{
if (a >= '0' && a <= '9')
return a - '0';
return a - 'a' + 10;
else if (a >= 'A' && a <= 'F')
return a - 'A' + 10;
- else
+ else
error ("Reply contains invalid hex digit %d", a);
}
+static int
+hex2bin (const char *hex, char *bin, 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;
+}
+
/* Convert number NIB to a hex digit. */
static int
-tohex (nib)
- int nib;
+tohex (int nib)
{
if (nib < 10)
- return '0'+nib;
+ return '0' + nib;
else
- return 'a'+nib-10;
+ return 'a' + nib - 10;
+}
+
+static int
+bin2hex (const char *bin, char *hex, 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;
}
\f
+/* Check for the availability of vCont. This function should also check
+ the response. */
+
+static void
+remote_vcont_probe (struct remote_state *rs, char *buf)
+{
+ strcpy (buf, "vCont?");
+ putpkt (buf);
+ getpkt (buf, rs->remote_packet_size, 0);
+
+ /* Make sure that the features we assume are supported. */
+ if (strncmp (buf, "vCont", 5) == 0)
+ {
+ char *p = &buf[5];
+ int support_s, support_S, support_c, support_C;
+
+ support_s = 0;
+ support_S = 0;
+ support_c = 0;
+ support_C = 0;
+ while (p && *p == ';')
+ {
+ p++;
+ if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
+ support_s = 1;
+ else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
+ support_S = 1;
+ else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
+ support_c = 1;
+ else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
+ support_C = 1;
+
+ p = strchr (p, ';');
+ }
+
+ /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
+ BUF will make packet_ok disable the packet. */
+ if (!support_s || !support_S || !support_c || !support_C)
+ buf[0] = 0;
+ }
+
+ packet_ok (buf, &remote_protocol_vcont);
+}
+
+/* Resume the remote inferior by using a "vCont" packet. The thread
+ to be resumed is PTID; STEP and SIGGNAL indicate whether the
+ resumed thread should be single-stepped and/or signalled. If PTID's
+ PID is -1, then all threads are resumed; the thread to be stepped and/or
+ signalled is given in the global INFERIOR_PTID. This function returns
+ non-zero iff it resumes the inferior.
+
+ This function issues a strict subset of all possible vCont commands at the
+ moment. */
+
+static int
+remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal)
+{
+ struct remote_state *rs = get_remote_state ();
+ int pid = PIDGET (ptid);
+ char *buf = NULL, *outbuf;
+ struct cleanup *old_cleanup;
+
+ buf = xmalloc (rs->remote_packet_size);
+ old_cleanup = make_cleanup (xfree, buf);
+
+ if (remote_protocol_vcont.support == PACKET_SUPPORT_UNKNOWN)
+ remote_vcont_probe (rs, buf);
+
+ if (remote_protocol_vcont.support == PACKET_DISABLE)
+ {
+ do_cleanups (old_cleanup);
+ return 0;
+ }
+
+ /* If we could generate a wider range of packets, we'd have to worry
+ about overflowing BUF. Should there be a generic
+ "multi-part-packet" packet? */
+
+ if (PIDGET (inferior_ptid) == MAGIC_NULL_PID)
+ {
+ /* MAGIC_NULL_PTID means that we don't have any active threads, so we
+ don't have any PID numbers the inferior will understand. Make sure
+ to only send forms that do not specify a PID. */
+ if (step && siggnal != TARGET_SIGNAL_0)
+ outbuf = xstrprintf ("vCont;S%02x", siggnal);
+ else if (step)
+ outbuf = xstrprintf ("vCont;s");
+ else if (siggnal != TARGET_SIGNAL_0)
+ outbuf = xstrprintf ("vCont;C%02x", siggnal);
+ else
+ outbuf = xstrprintf ("vCont;c");
+ }
+ else if (pid == -1)
+ {
+ /* Resume all threads, with preference for INFERIOR_PTID. */
+ if (step && siggnal != TARGET_SIGNAL_0)
+ outbuf = xstrprintf ("vCont;S%02x:%x;c", siggnal,
+ PIDGET (inferior_ptid));
+ else if (step)
+ outbuf = xstrprintf ("vCont;s:%x;c", PIDGET (inferior_ptid));
+ else if (siggnal != TARGET_SIGNAL_0)
+ outbuf = xstrprintf ("vCont;C%02x:%x;c", siggnal,
+ PIDGET (inferior_ptid));
+ else
+ outbuf = xstrprintf ("vCont;c");
+ }
+ else
+ {
+ /* Scheduler locking; resume only PTID. */
+ if (step && siggnal != TARGET_SIGNAL_0)
+ outbuf = xstrprintf ("vCont;S%02x:%x", siggnal, pid);
+ else if (step)
+ outbuf = xstrprintf ("vCont;s:%x", pid);
+ else if (siggnal != TARGET_SIGNAL_0)
+ outbuf = xstrprintf ("vCont;C%02x:%x", siggnal, pid);
+ else
+ outbuf = xstrprintf ("vCont;c:%x", pid);
+ }
+
+ gdb_assert (outbuf && strlen (outbuf) < rs->remote_packet_size);
+ make_cleanup (xfree, outbuf);
+
+ putpkt (outbuf);
+
+ do_cleanups (old_cleanup);
+
+ return 1;
+}
+
/* Tell the remote machine to resume. */
static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
static int last_sent_step;
static void
-remote_resume (pid, step, siggnal)
- int pid, step;
- enum target_signal siggnal;
+remote_resume (ptid_t ptid, int step, enum target_signal siggnal)
{
- char *buf = alloca (PBUFSIZ);
-
- if (pid == -1)
- set_thread (0, 0); /* run any thread */
- else
- set_thread (pid, 0); /* run this thread */
-
- dcache_flush (remote_dcache);
+ struct remote_state *rs = get_remote_state ();
+ char *buf = alloca (rs->remote_packet_size);
+ int pid = PIDGET (ptid);
+ char *p;
last_sent_signal = siggnal;
last_sent_step = step;
if (target_resume_hook)
(*target_resume_hook) ();
+ /* The vCont packet doesn't need to specify threads via Hc. */
+ if (remote_vcont_resume (ptid, step, siggnal))
+ return;
+
+ /* All other supported resume packets do use Hc, so call set_thread. */
+ if (pid == -1)
+ set_thread (0, 0); /* run any thread */
+ else
+ set_thread (pid, 0); /* run this thread */
+
+ /* The s/S/c/C packets do not return status. So if the target does
+ not support the S or C packets, the debug agent returns an empty
+ string which is detected in remote_wait(). This protocol defect
+ is fixed in the e/E packets. */
+
+ if (step && step_range_end)
+ {
+ /* If the target does not support the 'E' packet, we try the 'S'
+ packet. Ideally we would fall back to the 'e' packet if that
+ too is not supported. But that would require another copy of
+ the code to issue the 'e' packet (and fall back to 's' if not
+ supported) in remote_wait(). */
+
+ if (siggnal != TARGET_SIGNAL_0)
+ {
+ if (remote_protocol_E.support != PACKET_DISABLE)
+ {
+ p = buf;
+ *p++ = 'E';
+ *p++ = tohex (((int) siggnal >> 4) & 0xf);
+ *p++ = tohex (((int) siggnal) & 0xf);
+ *p++ = ',';
+ p += hexnumstr (p, (ULONGEST) step_range_start);
+ *p++ = ',';
+ p += hexnumstr (p, (ULONGEST) step_range_end);
+ *p++ = 0;
+
+ putpkt (buf);
+ getpkt (buf, (rs->remote_packet_size), 0);
+
+ if (packet_ok (buf, &remote_protocol_E) == PACKET_OK)
+ return;
+ }
+ }
+ else
+ {
+ if (remote_protocol_e.support != PACKET_DISABLE)
+ {
+ p = buf;
+ *p++ = 'e';
+ p += hexnumstr (p, (ULONGEST) step_range_start);
+ *p++ = ',';
+ p += hexnumstr (p, (ULONGEST) step_range_end);
+ *p++ = 0;
+
+ putpkt (buf);
+ getpkt (buf, (rs->remote_packet_size), 0);
+
+ if (packet_ok (buf, &remote_protocol_e) == PACKET_OK)
+ return;
+ }
+ }
+ }
+
if (siggnal != TARGET_SIGNAL_0)
{
buf[0] = step ? 'S' : 'C';
- buf[1] = tohex (((int)siggnal >> 4) & 0xf);
- buf[2] = tohex ((int)siggnal & 0xf);
+ buf[1] = tohex (((int) siggnal >> 4) & 0xf);
+ buf[2] = tohex (((int) siggnal) & 0xf);
buf[3] = '\0';
}
else
- strcpy (buf, step ? "s": "c");
+ strcpy (buf, step ? "s" : "c");
putpkt (buf);
}
+
+/* Same as remote_resume, but with async support. */
+static void
+remote_async_resume (ptid_t ptid, int step, enum target_signal siggnal)
+{
+ remote_resume (ptid, step, siggnal);
+
+ /* We are about to start executing the inferior, let's register it
+ with the event loop. NOTE: this is the one place where all the
+ execution commands end up. We could alternatively do this in each
+ of the execution commands in infcmd.c.*/
+ /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
+ into infcmd.c in order to allow inferior function calls to work
+ NOT asynchronously. */
+ if (event_loop_p && target_can_async_p ())
+ target_async (inferior_event_handler, 0);
+ /* Tell the world that the target is now executing. */
+ /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
+ this? Instead, should the client of target just assume (for
+ async targets) that the target is going to start executing? Is
+ this information already found in the continuation block? */
+ if (target_is_async_p ())
+ target_executing = 1;
+}
\f
+
+/* Set up the signal handler for SIGINT, while the target is
+ executing, ovewriting the 'regular' SIGINT signal handler. */
+static void
+initialize_sigint_signal_handler (void)
+{
+ sigint_remote_token =
+ create_async_signal_handler (async_remote_interrupt, NULL);
+ signal (SIGINT, handle_remote_sigint);
+}
+
+/* Signal handler for SIGINT, while the target is executing. */
+static void
+handle_remote_sigint (int sig)
+{
+ signal (sig, handle_remote_sigint_twice);
+ sigint_remote_twice_token =
+ create_async_signal_handler (async_remote_interrupt_twice, NULL);
+ mark_async_signal_handler_wrapper (sigint_remote_token);
+}
+
+/* Signal handler for SIGINT, installed after SIGINT has already been
+ sent once. It will take effect the second time that the user sends
+ a ^C. */
+static void
+handle_remote_sigint_twice (int sig)
+{
+ signal (sig, handle_sigint);
+ sigint_remote_twice_token =
+ create_async_signal_handler (inferior_event_handler_wrapper, NULL);
+ mark_async_signal_handler_wrapper (sigint_remote_twice_token);
+}
+
+/* Perform the real interruption of the target execution, in response
+ to a ^C. */
+static void
+async_remote_interrupt (gdb_client_data arg)
+{
+ if (remote_debug)
+ fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
+
+ target_stop ();
+}
+
+/* Perform interrupt, if the first attempt did not succeed. Just give
+ up on the target alltogether. */
+void
+async_remote_interrupt_twice (gdb_client_data arg)
+{
+ if (remote_debug)
+ fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n");
+ /* Do something only if the target was not killed by the previous
+ cntl-C. */
+ if (target_executing)
+ {
+ interrupt_query ();
+ signal (SIGINT, handle_remote_sigint);
+ }
+}
+
+/* Reinstall the usual SIGINT handlers, after the target has
+ stopped. */
+static void
+cleanup_sigint_signal_handler (void *dummy)
+{
+ signal (SIGINT, handle_sigint);
+ if (sigint_remote_twice_token)
+ delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_twice_token);
+ if (sigint_remote_token)
+ delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_token);
+}
+
/* Send ^C to target to halt it. Target will respond, and send us a
packet. */
-
-static void (*ofunc) PARAMS ((int));
+static void (*ofunc) (int);
/* The command line interface's stop routine. This function is installed
as a signal handler for SIGINT. The first time a user requests a
response from the target (it didn't stop when the user requested it),
we ask the user if he'd like to detach from the target. */
static void
-remote_interrupt (signo)
- int signo;
+remote_interrupt (int signo)
{
/* If this doesn't work, try more severe steps. */
signal (signo, remote_interrupt_twice);
/* The user typed ^C twice. */
static void
-remote_interrupt_twice (signo)
- int signo;
+remote_interrupt_twice (int signo)
{
signal (signo, ofunc);
interrupt_query ();
interrupt is requested, either by the command line or the GUI, we
will eventually end up here. */
static void
-remote_stop ()
+remote_stop (void)
{
/* Send a break or a ^C, depending on user preference. */
if (remote_debug)
fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
if (remote_break)
- SERIAL_SEND_BREAK (remote_desc);
+ serial_send_break (remote_desc);
else
- SERIAL_WRITE (remote_desc, "\003", 1);
+ serial_write (remote_desc, "\003", 1);
}
/* Ask the user what to do when an interrupt is received. */
static void
-interrupt_query ()
+interrupt_query (void)
{
target_terminal_ours ();
Give up (and stop debugging it)? "))
{
target_mourn_inferior ();
- return_to_top_level (RETURN_QUIT);
+ throw_exception (RETURN_QUIT);
}
target_terminal_inferior ();
}
+/* Enable/disable target terminal ownership. Most targets can use
+ terminal groups to control terminal ownership. Remote targets are
+ different in that explicit transfer of ownership to/from GDB/target
+ is required. */
+
+static void
+remote_async_terminal_inferior (void)
+{
+ /* FIXME: cagney/1999-09-27: Shouldn't need to test for
+ sync_execution here. This function should only be called when
+ GDB is resuming the inferior in the forground. A background
+ resume (``run&'') should leave GDB in control of the terminal and
+ consequently should not call this code. */
+ if (!sync_execution)
+ return;
+ /* FIXME: cagney/1999-09-27: Closely related to the above. Make
+ calls target_terminal_*() idenpotent. The event-loop GDB talking
+ to an asynchronous target with a synchronous command calls this
+ function from both event-top.c and infrun.c/infcmd.c. Once GDB
+ stops trying to transfer the terminal to the target when it
+ shouldn't this guard can go away. */
+ if (!remote_async_terminal_ours_p)
+ return;
+ delete_file_handler (input_fd);
+ remote_async_terminal_ours_p = 0;
+ initialize_sigint_signal_handler ();
+ /* NOTE: At this point we could also register our selves as the
+ recipient of all input. Any characters typed could then be
+ passed on down to the target. */
+}
+
+static void
+remote_async_terminal_ours (void)
+{
+ /* See FIXME in remote_async_terminal_inferior. */
+ if (!sync_execution)
+ return;
+ /* See FIXME in remote_async_terminal_inferior. */
+ if (remote_async_terminal_ours_p)
+ return;
+ cleanup_sigint_signal_handler (NULL);
+ add_file_handler (input_fd, stdin_event_handler, 0);
+ remote_async_terminal_ours_p = 1;
+}
+
/* If nonzero, ignore the next kill. */
int kill_kludge;
-void
-remote_console_output (msg)
- char *msg;
-{
- char *p;
+void
+remote_console_output (char *msg)
+{
+ char *p;
+
+ for (p = msg; p[0] && p[1]; p += 2)
+ {
+ char tb[2];
+ char c = fromhex (p[0]) * 16 + fromhex (p[1]);
+ tb[0] = c;
+ tb[1] = 0;
+ fputs_unfiltered (tb, gdb_stdtarg);
+ }
+ gdb_flush (gdb_stdtarg);
+}
+
+/* Wait until the remote machine stops, then return,
+ storing status in STATUS just as `wait' would.
+ Returns "pid", which in the case of a multi-threaded
+ remote OS, is the thread-id. */
+
+static ptid_t
+remote_wait (ptid_t ptid, struct target_waitstatus *status)
+{
+ struct remote_state *rs = get_remote_state ();
+ unsigned char *buf = alloca (rs->remote_packet_size);
+ ULONGEST thread_num = -1;
+ ULONGEST addr;
+
+ status->kind = TARGET_WAITKIND_EXITED;
+ status->value.integer = 0;
+
+ while (1)
+ {
+ unsigned char *p;
+
+ ofunc = signal (SIGINT, remote_interrupt);
+ getpkt (buf, (rs->remote_packet_size), 1);
+ signal (SIGINT, ofunc);
+
+ /* This is a hook for when we need to do something (perhaps the
+ collection of trace data) every time the target stops. */
+ if (target_wait_loop_hook)
+ (*target_wait_loop_hook) ();
+
+ remote_stopped_by_watchpoint_p = 0;
+
+ switch (buf[0])
+ {
+ case 'E': /* Error of some sort */
+ warning ("Remote failure reply: %s", buf);
+ continue;
+ case 'F': /* File-I/O request */
+ remote_fileio_request (buf);
+ continue;
+ case 'T': /* Status with PC, SP, FP, ... */
+ {
+ int i;
+ char regs[MAX_REGISTER_SIZE];
+
+ /* Expedited reply, containing Signal, {regno, reg} repeat */
+ /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
+ ss = signal number
+ n... = register number
+ r... = register contents
+ */
+ p = &buf[3]; /* after Txx */
+
+ while (*p)
+ {
+ unsigned char *p1;
+ char *p_temp;
+ int fieldsize;
+ LONGEST pnum = 0;
+
+ /* If the packet contains a register number save it in pnum
+ and set p1 to point to the character following it.
+ Otherwise p1 points to p. */
+
+ /* If this packet is an awatch packet, don't parse the 'a'
+ as a register number. */
+
+ if (strncmp (p, "awatch", strlen("awatch")) != 0)
+ {
+ /* Read the ``P'' register number. */
+ pnum = strtol (p, &p_temp, 16);
+ p1 = (unsigned char *) p_temp;
+ }
+ else
+ p1 = p;
+
+ if (p1 == p) /* No register number present here */
+ {
+ p1 = (unsigned char *) strchr (p, ':');
+ if (p1 == NULL)
+ warning ("Malformed packet(a) (missing colon): %s\n\
+Packet: '%s'\n",
+ p, buf);
+ if (strncmp (p, "thread", p1 - p) == 0)
+ {
+ p_temp = unpack_varlen_hex (++p1, &thread_num);
+ record_currthread (thread_num);
+ p = (unsigned char *) p_temp;
+ }
+ else if ((strncmp (p, "watch", p1 - p) == 0)
+ || (strncmp (p, "rwatch", p1 - p) == 0)
+ || (strncmp (p, "awatch", p1 - p) == 0))
+ {
+ remote_stopped_by_watchpoint_p = 1;
+ p = unpack_varlen_hex (++p1, &addr);
+ remote_watch_data_address = (CORE_ADDR)addr;
+ }
+ else
+ {
+ /* Silently skip unknown optional info. */
+ p_temp = strchr (p1 + 1, ';');
+ if (p_temp)
+ p = (unsigned char *) p_temp;
+ }
+ }
+ else
+ {
+ struct packet_reg *reg = packet_reg_from_pnum (rs, pnum);
+ p = p1;
+
+ if (*p++ != ':')
+ error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n",
+ p, buf);
+
+ if (reg == NULL)
+ error ("Remote sent bad register number %s: %s\nPacket: '%s'\n",
+ phex_nz (pnum, 0), p, buf);
+
+ fieldsize = hex2bin (p, regs, DEPRECATED_REGISTER_RAW_SIZE (reg->regnum));
+ p += 2 * fieldsize;
+ if (fieldsize < DEPRECATED_REGISTER_RAW_SIZE (reg->regnum))
+ warning ("Remote reply is too short: %s", buf);
+ supply_register (reg->regnum, regs);
+ }
+
+ if (*p++ != ';')
+ error ("Remote register badly formatted: %s\nhere: %s", buf, p);
+ }
+ }
+ /* fall through */
+ case 'S': /* Old style status, just signal only */
+ status->kind = TARGET_WAITKIND_STOPPED;
+ status->value.sig = (enum target_signal)
+ (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
+
+ if (buf[3] == 'p')
+ {
+ thread_num = strtol ((const char *) &buf[4], NULL, 16);
+ record_currthread (thread_num);
+ }
+ goto got_status;
+ case 'W': /* Target exited */
+ {
+ /* The remote process exited. */
+ status->kind = TARGET_WAITKIND_EXITED;
+ status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
+ goto got_status;
+ }
+ case 'X':
+ status->kind = TARGET_WAITKIND_SIGNALLED;
+ status->value.sig = (enum target_signal)
+ (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
+ kill_kludge = 1;
+
+ goto got_status;
+ case 'O': /* Console output */
+ remote_console_output (buf + 1);
+ continue;
+ case '\0':
+ if (last_sent_signal != TARGET_SIGNAL_0)
+ {
+ /* Zero length reply means that we tried 'S' or 'C' and
+ the remote system doesn't support it. */
+ target_terminal_ours_for_output ();
+ printf_filtered
+ ("Can't send signals to this remote system. %s not sent.\n",
+ target_signal_to_name (last_sent_signal));
+ last_sent_signal = TARGET_SIGNAL_0;
+ target_terminal_inferior ();
- for (p = msg; *p; p +=2)
+ strcpy ((char *) buf, last_sent_step ? "s" : "c");
+ putpkt ((char *) buf);
+ continue;
+ }
+ /* else fallthrough */
+ default:
+ warning ("Invalid remote reply: %s", buf);
+ continue;
+ }
+ }
+got_status:
+ if (thread_num != -1)
{
- char tb[2];
- char c = fromhex (p[0]) * 16 + fromhex (p[1]);
- tb[0] = c;
- tb[1] = 0;
- if (target_output_hook)
- target_output_hook (tb);
- else
- fputs_filtered (tb, gdb_stdout);
+ return pid_to_ptid (thread_num);
}
+ return inferior_ptid;
}
-/* Wait until the remote machine stops, then return,
- storing status in STATUS just as `wait' would.
- Returns "pid", which in the case of a multi-threaded
- remote OS, is the thread-id. */
-
-static int
-remote_wait (pid, status)
- int pid;
- struct target_waitstatus *status;
+/* Async version of remote_wait. */
+static ptid_t
+remote_async_wait (ptid_t ptid, struct target_waitstatus *status)
{
- unsigned char *buf = alloca (PBUFSIZ);
- int thread_num = -1;
+ struct remote_state *rs = get_remote_state ();
+ unsigned char *buf = alloca (rs->remote_packet_size);
+ ULONGEST thread_num = -1;
+ ULONGEST addr;
status->kind = TARGET_WAITKIND_EXITED;
status->value.integer = 0;
+ remote_stopped_by_watchpoint_p = 0;
+
while (1)
{
unsigned char *p;
- ofunc = signal (SIGINT, remote_interrupt);
- getpkt ((char *) buf, 1);
- signal (SIGINT, ofunc);
+ if (!target_is_async_p ())
+ ofunc = signal (SIGINT, remote_interrupt);
+ /* FIXME: cagney/1999-09-27: If we're in async mode we should
+ _never_ wait for ever -> test on target_is_async_p().
+ However, before we do that we need to ensure that the caller
+ knows how to take the target into/out of async mode. */
+ getpkt (buf, (rs->remote_packet_size), wait_forever_enabled_p);
+ if (!target_is_async_p ())
+ signal (SIGINT, ofunc);
/* This is a hook for when we need to do something (perhaps the
- collection of trace data) every time the target stops. */
+ collection of trace data) every time the target stops. */
if (target_wait_loop_hook)
(*target_wait_loop_hook) ();
case 'E': /* Error of some sort */
warning ("Remote failure reply: %s", buf);
continue;
+ case 'F': /* File-I/O request */
+ remote_fileio_request (buf);
+ continue;
case 'T': /* Status with PC, SP, FP, ... */
{
int i;
- long regno;
- char regs[MAX_REGISTER_RAW_SIZE];
+ char regs[MAX_REGISTER_SIZE];
/* Expedited reply, containing Signal, {regno, reg} repeat */
/* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
- ss = signal number
- n... = register number
- r... = register contents
- */
+ ss = signal number
+ n... = register number
+ r... = register contents
+ */
p = &buf[3]; /* after Txx */
while (*p)
{
unsigned char *p1;
char *p_temp;
+ int fieldsize;
+ long pnum = 0;
+
+ /* If the packet contains a register number, save it in pnum
+ and set p1 to point to the character following it.
+ Otherwise p1 points to p. */
- /* Read the register number */
- regno = strtol ((const char *) p, &p_temp, 16);
- p1 = (unsigned char *)p_temp;
+ /* If this packet is an awatch packet, don't parse the 'a'
+ as a register number. */
+
+ if (!strncmp (p, "awatch", strlen ("awatch")) != 0)
+ {
+ /* Read the register number. */
+ pnum = strtol (p, &p_temp, 16);
+ p1 = (unsigned char *) p_temp;
+ }
+ else
+ p1 = p;
- if (p1 == p) /* No register number present here */
+ if (p1 == p) /* No register number present here */
{
- p1 = (unsigned char *) strchr ((const char *) p, ':');
+ p1 = (unsigned char *) strchr (p, ':');
if (p1 == NULL)
- warning ("Malformed packet(a) (missing colon): %s\n\
-Packet: '%s'\n",
- p, buf);
- if (strncmp ((const char *) p, "thread", p1 - p) == 0)
+ error ("Malformed packet(a) (missing colon): %s\nPacket: '%s'\n",
+ p, buf);
+ if (strncmp (p, "thread", p1 - p) == 0)
{
p_temp = unpack_varlen_hex (++p1, &thread_num);
record_currthread (thread_num);
p = (unsigned char *) p_temp;
}
+ else if ((strncmp (p, "watch", p1 - p) == 0)
+ || (strncmp (p, "rwatch", p1 - p) == 0)
+ || (strncmp (p, "awatch", p1 - p) == 0))
+ {
+ remote_stopped_by_watchpoint_p = 1;
+ p = unpack_varlen_hex (++p1, &addr);
+ remote_watch_data_address = (CORE_ADDR)addr;
+ }
+ else
+ {
+ /* Silently skip unknown optional info. */
+ p_temp = (unsigned char *) strchr (p1 + 1, ';');
+ if (p_temp)
+ p = p_temp;
+ }
}
+
else
{
+ struct packet_reg *reg = packet_reg_from_pnum (rs, pnum);
p = p1;
-
if (*p++ != ':')
- warning ("Malformed packet(b) (missing colon): %s\n\
-Packet: '%s'\n",
- p, buf);
-
- if (regno >= NUM_REGS)
- warning ("Remote sent bad register number %ld: %s\n\
-Packet: '%s'\n",
- regno, p, buf);
-
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i++)
- {
- if (p[0] == 0 || p[1] == 0)
- warning ("Remote reply is too short: %s", buf);
- regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
- p += 2;
- }
- supply_register (regno, regs);
+ error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n",
+ p, buf);
+
+ if (reg == NULL)
+ error ("Remote sent bad register number %ld: %s\nPacket: '%s'\n",
+ pnum, p, buf);
+
+ fieldsize = hex2bin (p, regs, DEPRECATED_REGISTER_RAW_SIZE (reg->regnum));
+ p += 2 * fieldsize;
+ if (fieldsize < DEPRECATED_REGISTER_RAW_SIZE (reg->regnum))
+ warning ("Remote reply is too short: %s", buf);
+ supply_register (reg->regnum, regs);
}
if (*p++ != ';')
- {
- warning ("Remote register badly formatted: %s", buf);
- warning (" here: %s",p);
- }
+ error ("Remote register badly formatted: %s\nhere: %s",
+ buf, p);
}
}
/* fall through */
if (buf[3] == 'p')
{
- /* Export Cisco kernel mode as a convenience variable
- (so that it can be used in the GDB prompt if desired). */
-
- if (cisco_kernel_mode == 1)
- set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
- value_from_string ("PDEBUG-"));
- cisco_kernel_mode = 0;
thread_num = strtol ((const char *) &buf[4], NULL, 16);
record_currthread (thread_num);
}
- else if (buf[3] == 'k')
- {
- /* Export Cisco kernel mode as a convenience variable
- (so that it can be used in the GDB prompt if desired). */
-
- if (cisco_kernel_mode == 1)
- set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
- value_from_string ("KDEBUG-"));
- cisco_kernel_mode = 1;
- }
goto got_status;
- case 'N': /* Cisco special: status and offsets */
- {
- bfd_vma text_addr, data_addr, bss_addr;
- bfd_signed_vma text_off, data_off, bss_off;
- unsigned char *p1;
-
- status->kind = TARGET_WAITKIND_STOPPED;
- status->value.sig = (enum target_signal)
- (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
-
- if (symfile_objfile == NULL)
- {
- warning ("Relocation packet recieved with no symbol file. \
-Packet Dropped");
- goto got_status;
- }
-
- /* Relocate object file. Buffer format is NAATT;DD;BB
- * where AA is the signal number, TT is the new text
- * address, DD * is the new data address, and BB is the
- * new bss address. */
-
- p = &buf[3];
- text_addr = strtoul (p, (char **) &p1, 16);
- if (p1 == p || *p1 != ';')
- warning ("Malformed relocation packet: Packet '%s'", buf);
- p = p1 + 1;
- data_addr = strtoul (p, (char **) &p1, 16);
- if (p1 == p || *p1 != ';')
- warning ("Malformed relocation packet: Packet '%s'", buf);
- p = p1 + 1;
- bss_addr = strtoul (p, (char **) &p1, 16);
- if (p1 == p)
- warning ("Malformed relocation packet: Packet '%s'", buf);
-
- if (remote_cisco_section_offsets (text_addr, data_addr, bss_addr,
- &text_off, &data_off, &bss_off)
- == 0)
- if (text_off != 0 || data_off != 0 || bss_off != 0)
- remote_cisco_objfile_relocate (text_off, data_off, bss_off);
-
- goto got_status;
- }
case 'W': /* Target exited */
{
/* The remote process exited. */
goto got_status;
case 'O': /* Console output */
remote_console_output (buf + 1);
- continue;
+ /* Return immediately to the event loop. The event loop will
+ still be waiting on the inferior afterwards. */
+ status->kind = TARGET_WAITKIND_IGNORE;
+ goto got_status;
case '\0':
if (last_sent_signal != TARGET_SIGNAL_0)
{
/* Zero length reply means that we tried 'S' or 'C' and
- the remote system doesn't support it. */
+ the remote system doesn't support it. */
target_terminal_ours_for_output ();
printf_filtered
("Can't send signals to this remote system. %s not sent.\n",
continue;
}
}
- got_status:
+got_status:
if (thread_num != -1)
{
- return thread_num;
+ return pid_to_ptid (thread_num);
}
- return inferior_pid;
+ return inferior_ptid;
}
/* Number of bytes of registers this stub implements. */
static int register_bytes_found;
/* Read the remote registers into the block REGS. */
-/* Currently we just read all the registers, so we don't use regno. */
+/* Currently we just read all the registers, so we don't use regnum. */
-/* ARGSUSED */
static void
-remote_fetch_registers (regno)
- int regno;
+remote_fetch_registers (int regnum)
{
- char *buf = alloca (PBUFSIZ);
+ struct remote_state *rs = get_remote_state ();
+ char *buf = alloca (rs->remote_packet_size);
int i;
char *p;
- char regs[REGISTER_BYTES];
+ char *regs = alloca (rs->sizeof_g_packet);
- set_thread (inferior_pid, 1);
+ set_thread (PIDGET (inferior_ptid), 1);
+
+ if (regnum >= 0)
+ {
+ struct packet_reg *reg = packet_reg_from_regnum (rs, regnum);
+ gdb_assert (reg != NULL);
+ if (!reg->in_g_packet)
+ internal_error (__FILE__, __LINE__,
+ "Attempt to fetch a non G-packet register when this "
+ "remote.c does not support the p-packet.");
+ }
sprintf (buf, "g");
- remote_send (buf);
+ remote_send (buf, (rs->remote_packet_size));
- if (remote_register_buf_size == 0)
- remote_register_buf_size = strlen (buf);
+ /* Save the size of the packet sent to us by the target. Its used
+ as a heuristic when determining the max size of packets that the
+ target can safely receive. */
+ if ((rs->actual_register_packet_size) == 0)
+ (rs->actual_register_packet_size) = strlen (buf);
/* Unimplemented registers read as all bits zero. */
- memset (regs, 0, REGISTER_BYTES);
+ memset (regs, 0, rs->sizeof_g_packet);
/* We can get out of synch in various cases. If the first character
in the buffer is not a hex character, assume that has happened
if (remote_debug)
fprintf_unfiltered (gdb_stdlog,
"Bad register packet; fetching a new packet\n");
- getpkt (buf, 0);
+ getpkt (buf, (rs->remote_packet_size), 0);
}
/* Reply describes registers byte by byte, each byte encoded as two
register cacheing/storage mechanism. */
p = buf;
- for (i = 0; i < REGISTER_BYTES; i++)
+ for (i = 0; i < rs->sizeof_g_packet; i++)
{
if (p[0] == 0)
break;
goto supply_them;
}
if (p[0] == 'x' && p[1] == 'x')
- regs[i] = 0; /* 'x' */
+ regs[i] = 0; /* 'x' */
else
regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
p += 2;
if (i != register_bytes_found)
{
register_bytes_found = i;
-#ifdef REGISTER_BYTES_OK
- if (!REGISTER_BYTES_OK (i))
+ if (REGISTER_BYTES_OK_P ()
+ && !REGISTER_BYTES_OK (i))
warning ("Remote reply is too short: %s", buf);
-#endif
}
-
- supply_them:
- for (i = 0; i < NUM_REGS; i++)
+
+ supply_them:
{
- supply_register (i, ®s[REGISTER_BYTE(i)]);
- if (buf[REGISTER_BYTE(i) * 2] == 'x')
- register_valid[i] = -1; /* register value not available */
+ int i;
+ for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
+ {
+ struct packet_reg *r = &rs->regs[i];
+ if (r->in_g_packet)
+ {
+ if (r->offset * 2 >= strlen (buf))
+ /* A short packet that didn't include the register's
+ value, this implies that the register is zero (and
+ not that the register is unavailable). Supply that
+ zero value. */
+ regcache_raw_supply (current_regcache, r->regnum, NULL);
+ else if (buf[r->offset * 2] == 'x')
+ {
+ gdb_assert (r->offset * 2 < strlen (buf));
+ /* The register isn't available, mark it as such (at
+ the same time setting the value to zero). */
+ regcache_raw_supply (current_regcache, r->regnum, NULL);
+ set_register_cached (i, -1);
+ }
+ else
+ regcache_raw_supply (current_regcache, r->regnum,
+ regs + r->offset);
+ }
+ }
}
}
'G' request), we have to read out the ones we don't want to change
first. */
-static void
-remote_prepare_to_store ()
+static void
+remote_prepare_to_store (void)
{
+ struct remote_state *rs = get_remote_state ();
+ int i;
+ char buf[MAX_REGISTER_SIZE];
+
/* Make sure the entire registers array is valid. */
- read_register_bytes (0, (char *)NULL, REGISTER_BYTES);
+ switch (remote_protocol_P.support)
+ {
+ case PACKET_DISABLE:
+ case PACKET_SUPPORT_UNKNOWN:
+ /* Make sure all the necessary registers are cached. */
+ for (i = 0; i < NUM_REGS; i++)
+ if (rs->regs[i].in_g_packet)
+ regcache_raw_read (current_regcache, rs->regs[i].regnum, buf);
+ break;
+ case PACKET_ENABLE:
+ break;
+ }
+}
+
+/* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
+ packet was not recognized. */
+
+static int
+store_register_using_P (int regnum)
+{
+ struct remote_state *rs = get_remote_state ();
+ struct packet_reg *reg = packet_reg_from_regnum (rs, regnum);
+ /* Try storing a single register. */
+ char *buf = alloca (rs->remote_packet_size);
+ char regp[MAX_REGISTER_SIZE];
+ char *p;
+ int i;
+
+ sprintf (buf, "P%s=", phex_nz (reg->pnum, 0));
+ p = buf + strlen (buf);
+ regcache_collect (reg->regnum, regp);
+ bin2hex (regp, p, DEPRECATED_REGISTER_RAW_SIZE (reg->regnum));
+ remote_send (buf, rs->remote_packet_size);
+
+ return buf[0] != '\0';
}
-/* Store register REGNO, or all registers if REGNO == -1, from the contents
- of REGISTERS. FIXME: ignores errors. */
+
+/* Store register REGNUM, or all registers if REGNUM == -1, from the contents
+ of the register cache buffer. FIXME: ignores errors. */
static void
-remote_store_registers (regno)
- int regno;
+remote_store_registers (int regnum)
{
- char *buf = alloca (PBUFSIZ);
+ struct remote_state *rs = get_remote_state ();
+ char *buf;
+ char *regs;
int i;
char *p;
- set_thread (inferior_pid, 1);
+ set_thread (PIDGET (inferior_ptid), 1);
- if (regno >= 0 && stub_supports_P)
+ if (regnum >= 0)
{
- /* Try storing a single register. */
- char *regp;
-
- sprintf (buf, "P%x=", regno);
- p = buf + strlen (buf);
- regp = ®isters[REGISTER_BYTE (regno)];
- for (i = 0; i < REGISTER_RAW_SIZE (regno); ++i)
- {
- *p++ = tohex ((regp[i] >> 4) & 0xf);
- *p++ = tohex (regp[i] & 0xf);
- }
- *p = '\0';
- remote_send (buf);
- if (buf[0] != '\0')
+ switch (remote_protocol_P.support)
{
- /* The stub understands the 'P' request. We are done. */
- return;
+ case PACKET_DISABLE:
+ break;
+ case PACKET_ENABLE:
+ if (store_register_using_P (regnum))
+ return;
+ else
+ error ("Protocol error: P packet not recognized by stub");
+ case PACKET_SUPPORT_UNKNOWN:
+ if (store_register_using_P (regnum))
+ {
+ /* The stub recognized the 'P' packet. Remember this. */
+ remote_protocol_P.support = PACKET_ENABLE;
+ return;
+ }
+ else
+ {
+ /* The stub does not support the 'P' packet. Use 'G'
+ instead, and don't try using 'P' in the future (it
+ will just waste our time). */
+ remote_protocol_P.support = PACKET_DISABLE;
+ break;
+ }
}
-
- /* The stub does not support the 'P' request. Use 'G' instead,
- and don't try using 'P' in the future (it will just waste our
- time). */
- stub_supports_P = 0;
}
- buf[0] = 'G';
+ /* Extract all the registers in the regcache copying them into a
+ local buffer. */
+ {
+ int i;
+ regs = alloca (rs->sizeof_g_packet);
+ memset (regs, rs->sizeof_g_packet, 0);
+ for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
+ {
+ struct packet_reg *r = &rs->regs[i];
+ if (r->in_g_packet)
+ regcache_collect (r->regnum, regs + r->offset);
+ }
+ }
/* Command describes registers byte by byte,
each byte encoded as two hex characters. */
-
- p = buf + 1;
+ buf = alloca (rs->remote_packet_size);
+ p = buf;
+ *p++ = 'G';
/* remote_prepare_to_store insures that register_bytes_found gets set. */
- for (i = 0; i < register_bytes_found; i++)
- {
- *p++ = tohex ((registers[i] >> 4) & 0xf);
- *p++ = tohex (registers[i] & 0xf);
- }
- *p = '\0';
-
- remote_send (buf);
-}
-
-/* Use of the data cache *used* to be disabled because it loses for looking
- at and changing hardware I/O ports and the like. Accepting `volatile'
- would perhaps be one way to fix it. Another idea would be to use the
- executable file for the text segment (for all SEC_CODE sections?
- For all SEC_READONLY sections?). This has problems if you want to
- actually see what the memory contains (e.g. self-modifying code,
- clobbered memory, user downloaded the wrong thing).
-
- Because it speeds so much up, it's now enabled, if you're playing
- with registers you turn it of (set remotecache 0). */
-
-/* Read a word from remote address ADDR and return it.
- This goes through the data cache. */
-
-#if 0 /* unused? */
-static int
-remote_fetch_word (addr)
- CORE_ADDR addr;
-{
- return dcache_fetch (remote_dcache, addr);
+ bin2hex (regs, p, register_bytes_found);
+ remote_send (buf, (rs->remote_packet_size));
}
-
-/* Write a word WORD into remote address ADDR.
- This goes through the data cache. */
-
-static void
-remote_store_word (addr, word)
- CORE_ADDR addr;
- int word;
-{
- dcache_poke (remote_dcache, addr, word);
-}
-#endif /* 0 (unused?) */
-
\f
/* Return the number of hex digits in num. */
static int
-hexnumlen (num)
- ULONGEST num;
+hexnumlen (ULONGEST num)
{
int i;
return max (i, 1);
}
-/* Set BUF to the hex digits representing NUM. */
+/* Set BUF to the minimum number of hex digits representing NUM. */
static int
-hexnumstr (buf, num)
- char *buf;
- ULONGEST num;
+hexnumstr (char *buf, ULONGEST num)
{
- int i;
int len = hexnumlen (num);
+ return hexnumnstr (buf, num, len);
+}
- buf[len] = '\0';
- for (i = len - 1; i >= 0; i--)
+/* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
+
+static int
+hexnumnstr (char *buf, ULONGEST num, int width)
+{
+ int i;
+
+ buf[width] = '\0';
+
+ for (i = width - 1; i >= 0; i--)
{
- buf[i] = "0123456789abcdef" [(num & 0xf)];
+ buf[i] = "0123456789abcdef"[(num & 0xf)];
num >>= 4;
}
- return len;
+ return width;
}
/* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
static CORE_ADDR
-remote_address_masked (addr)
- CORE_ADDR addr;
+remote_address_masked (CORE_ADDR addr)
{
if (remote_address_size > 0
&& remote_address_size < (sizeof (ULONGEST) * 8))
the whole packet, since many stubs strip the eighth bit and subsequently
compute a wrong checksum, which causes real havoc with remote_write_bytes.
- NOTE: This can still lose if the serial line is not eight-bit clean. In
- cases like this, the user should clear "remotebinarydownload". */
+ NOTE: This can still lose if the serial line is not eight-bit
+ clean. In cases like this, the user should clear "remote
+ X-packet". */
+
static void
-check_binary_download (addr)
- CORE_ADDR addr;
+check_binary_download (CORE_ADDR addr)
{
- if (remote_binary_download && !remote_binary_checked)
+ struct remote_state *rs = get_remote_state ();
+ switch (remote_protocol_binary_download.support)
{
- char *buf = alloca (PBUFSIZ);
- char *p;
- remote_binary_checked = 1;
-
- p = buf;
- *p++ = 'X';
- p += hexnumstr (p, (ULONGEST) addr);
- *p++ = ',';
- p += hexnumstr (p, (ULONGEST) 0);
- *p++ = ':';
- *p = '\0';
+ case PACKET_DISABLE:
+ break;
+ case PACKET_ENABLE:
+ break;
+ case PACKET_SUPPORT_UNKNOWN:
+ {
+ char *buf = alloca (rs->remote_packet_size);
+ char *p;
- putpkt_binary (buf, (int) (p - buf));
- getpkt (buf, 0);
+ p = buf;
+ *p++ = 'X';
+ p += hexnumstr (p, (ULONGEST) addr);
+ *p++ = ',';
+ p += hexnumstr (p, (ULONGEST) 0);
+ *p++ = ':';
+ *p = '\0';
- if (buf[0] == '\0')
- remote_binary_download = 0;
- }
+ putpkt_binary (buf, (int) (p - buf));
+ getpkt (buf, (rs->remote_packet_size), 0);
- if (remote_debug)
- {
- if (remote_binary_download)
- fprintf_unfiltered (gdb_stdlog,
- "binary downloading suppported by target\n");
- else
- fprintf_unfiltered (gdb_stdlog,
- "binary downloading NOT suppported by target\n");
+ if (buf[0] == '\0')
+ {
+ if (remote_debug)
+ fprintf_unfiltered (gdb_stdlog,
+ "binary downloading NOT suppported by target\n");
+ remote_protocol_binary_download.support = PACKET_DISABLE;
+ }
+ else
+ {
+ if (remote_debug)
+ fprintf_unfiltered (gdb_stdlog,
+ "binary downloading suppported by target\n");
+ remote_protocol_binary_download.support = PACKET_ENABLE;
+ }
+ break;
+ }
}
}
MYADDR is the address of the buffer in our space.
LEN is the number of bytes.
- Returns number of bytes transferred, or 0 for error. */
+ Returns number of bytes transferred, or 0 (setting errno) for
+ error. Only transfer a single packet. */
-static int
-remote_write_bytes (memaddr, myaddr, len)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
+int
+remote_write_bytes (CORE_ADDR memaddr, char *myaddr, int len)
{
- unsigned char *buf = alloca (PBUFSIZ);
- int max_buf_size; /* Max size of packet output buffer */
- int origlen;
-
- /* Verify that the target can support a binary download */
+ unsigned char *buf;
+ unsigned char *p;
+ unsigned char *plen;
+ long sizeof_buf;
+ int plenlen;
+ int todo;
+ int nr_bytes;
+ int payload_size;
+ unsigned char *payload_start;
+
+ /* Verify that the target can support a binary download. */
check_binary_download (memaddr);
- /* Chop the transfer down if necessary */
+ /* Compute the size, and then allocate space for the largest
+ possible packet. Include space for an extra trailing NUL. */
+ sizeof_buf = get_memory_write_packet_size () + 1;
+ buf = alloca (sizeof_buf);
- max_buf_size = min (remote_write_size, PBUFSIZ);
- if (remote_register_buf_size != 0)
- max_buf_size = min (max_buf_size, remote_register_buf_size);
+ /* Compute the size of the actual payload by subtracting out the
+ packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
+ payload_size = (get_memory_write_packet_size () - (strlen ("$M,:#NN")
+ + hexnumlen (memaddr)
+ + hexnumlen (len)));
- /* Subtract header overhead from max payload size - $M<memaddr>,<len>:#nn */
- max_buf_size -= 2 + hexnumlen (memaddr + len - 1) + 1 + hexnumlen (len) + 4;
+ /* Construct the packet header: "[MX]<memaddr>,<len>:". */
- origlen = len;
- while (len > 0)
+ /* Append "[XM]". Compute a best guess of the number of bytes
+ actually transfered. */
+ p = buf;
+ switch (remote_protocol_binary_download.support)
{
- unsigned char *p, *plen;
- int todo;
- int i;
+ case PACKET_ENABLE:
+ *p++ = 'X';
+ /* Best guess at number of bytes that will fit. */
+ todo = min (len, payload_size);
+ break;
+ case PACKET_DISABLE:
+ *p++ = 'M';
+ /* num bytes that will fit */
+ todo = min (len, payload_size / 2);
+ break;
+ case PACKET_SUPPORT_UNKNOWN:
+ internal_error (__FILE__, __LINE__,
+ "remote_write_bytes: bad internal state");
+ default:
+ internal_error (__FILE__, __LINE__, "bad switch");
+ }
- /* construct "M"<memaddr>","<len>":" */
- /* sprintf (buf, "M%lx,%x:", (unsigned long) memaddr, todo); */
- memaddr = remote_address_masked (memaddr);
- p = buf;
- if (remote_binary_download)
- {
- *p++ = 'X';
- todo = min (len, max_buf_size);
- }
- else
- {
- *p++ = 'M';
- todo = min (len, max_buf_size / 2); /* num bytes that will fit */
- }
+ /* Append "<memaddr>". */
+ memaddr = remote_address_masked (memaddr);
+ p += hexnumstr (p, (ULONGEST) memaddr);
- p += hexnumstr (p, (ULONGEST) memaddr);
- *p++ = ',';
+ /* Append ",". */
+ *p++ = ',';
- plen = p; /* remember where len field goes */
- p += hexnumstr (p, (ULONGEST) todo);
- *p++ = ':';
- *p = '\0';
+ /* Append <len>. Retain the location/size of <len>. It may need to
+ be adjusted once the packet body has been created. */
+ plen = p;
+ plenlen = hexnumstr (p, (ULONGEST) todo);
+ p += plenlen;
- /* We send target system values byte by byte, in increasing byte
- addresses, each byte encoded as two hex characters (or one
- binary character). */
- if (remote_binary_download)
- {
- int escaped = 0;
- for (i = 0;
- (i < todo) && (i + escaped) < (max_buf_size - 2);
- i++)
- {
- switch (myaddr[i] & 0xff)
- {
- case '$':
- case '#':
- case 0x7d:
- /* These must be escaped */
- escaped++;
- *p++ = 0x7d;
- *p++ = (myaddr[i] & 0xff) ^ 0x20;
- break;
- default:
- *p++ = myaddr[i] & 0xff;
- break;
- }
- }
-
- if (i < todo)
- {
- /* Escape chars have filled up the buffer prematurely,
- and we have actually sent fewer bytes than planned.
- Fix-up the length field of the packet. */
-
- /* FIXME: will fail if new len is a shorter string than
- old len. */
-
- plen += hexnumstr (plen, (ULONGEST) i);
- *plen++ = ':';
- }
- }
- else
+ /* Append ":". */
+ *p++ = ':';
+ *p = '\0';
+
+ /* Append the packet body. */
+ payload_start = p;
+ switch (remote_protocol_binary_download.support)
+ {
+ case PACKET_ENABLE:
+ /* Binary mode. Send target system values byte by byte, in
+ increasing byte addresses. Only escape certain critical
+ characters. */
+ for (nr_bytes = 0;
+ (nr_bytes < todo) && (p - payload_start) < payload_size;
+ nr_bytes++)
{
- for (i = 0; i < todo; i++)
+ switch (myaddr[nr_bytes] & 0xff)
{
- *p++ = tohex ((myaddr[i] >> 4) & 0xf);
- *p++ = tohex (myaddr[i] & 0xf);
+ case '$':
+ case '#':
+ case 0x7d:
+ /* These must be escaped */
+ *p++ = 0x7d;
+ *p++ = (myaddr[nr_bytes] & 0xff) ^ 0x20;
+ break;
+ default:
+ *p++ = myaddr[nr_bytes] & 0xff;
+ break;
}
- *p = '\0';
}
-
- putpkt_binary (buf, (int) (p - buf));
- getpkt (buf, 0);
-
- if (buf[0] == 'E')
+ if (nr_bytes < todo)
{
- /* There is no correspondance between what the remote protocol uses
- for errors and errno codes. We would like a cleaner way of
- representing errors (big enough to include errno codes, bfd_error
- codes, and others). But for now just return EIO. */
- errno = EIO;
- return 0;
+ /* Escape chars have filled up the buffer prematurely,
+ and we have actually sent fewer bytes than planned.
+ Fix-up the length field of the packet. Use the same
+ number of characters as before. */
+ plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
+ *plen = ':'; /* overwrite \0 from hexnumnstr() */
}
+ break;
+ case PACKET_DISABLE:
+ /* Normal mode: Send target system values byte by byte, in
+ increasing byte addresses. Each byte is encoded as a two hex
+ value. */
+ nr_bytes = bin2hex (myaddr, p, todo);
+ p += 2 * nr_bytes;
+ break;
+ case PACKET_SUPPORT_UNKNOWN:
+ internal_error (__FILE__, __LINE__,
+ "remote_write_bytes: bad internal state");
+ default:
+ internal_error (__FILE__, __LINE__, "bad switch");
+ }
+
+ putpkt_binary (buf, (int) (p - buf));
+ getpkt (buf, sizeof_buf, 0);
- /* Increment by i, not by todo, in case escape chars
- caused us to send fewer bytes than we'd planned. */
- myaddr += i;
- memaddr += i;
- len -= i;
+ if (buf[0] == 'E')
+ {
+ /* There is no correspondance between what the remote protocol
+ uses for errors and errno codes. We would like a cleaner way
+ of representing errors (big enough to include errno codes,
+ bfd_error codes, and others). But for now just return EIO. */
+ errno = EIO;
+ return 0;
}
- return origlen;
+
+ /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer
+ bytes than we'd planned. */
+ return nr_bytes;
}
/* Read memory data directly from the remote machine.
Returns number of bytes transferred, or 0 for error. */
-static int
-remote_read_bytes (memaddr, myaddr, len)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
+/* NOTE: cagney/1999-10-18: This function (and its siblings in other
+ remote targets) shouldn't attempt to read the entire buffer.
+ Instead it should read a single packet worth of data and then
+ return the byte size of that packet to the caller. The caller (its
+ caller and its callers caller ;-) already contains code for
+ handling partial reads. */
+
+int
+remote_read_bytes (CORE_ADDR memaddr, char *myaddr, int len)
{
- char *buf = alloca (PBUFSIZ);
+ char *buf;
int max_buf_size; /* Max size of packet output buffer */
+ long sizeof_buf;
int origlen;
- /* Chop the transfer down if necessary */
-
- max_buf_size = min (remote_write_size, PBUFSIZ);
- if (remote_register_buf_size != 0)
- max_buf_size = min (max_buf_size, remote_register_buf_size);
+ /* Create a buffer big enough for this packet. */
+ max_buf_size = get_memory_read_packet_size ();
+ sizeof_buf = max_buf_size + 1; /* Space for trailing NUL */
+ buf = alloca (sizeof_buf);
origlen = len;
while (len > 0)
int todo;
int i;
- todo = min (len, max_buf_size / 2); /* num bytes that will fit */
+ todo = min (len, max_buf_size / 2); /* num bytes that will fit */
/* construct "m"<memaddr>","<len>" */
/* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */
*p = '\0';
putpkt (buf);
- getpkt (buf, 0);
+ getpkt (buf, sizeof_buf, 0);
- if (buf[0] == 'E')
+ if (buf[0] == 'E'
+ && isxdigit (buf[1]) && isxdigit (buf[2])
+ && buf[3] == '\0')
{
/* There is no correspondance between what the remote protocol uses
for errors and errno codes. We would like a cleaner way of
return 0;
}
- /* Reply describes memory byte by byte,
- each byte encoded as two hex characters. */
+ /* Reply describes memory byte by byte,
+ each byte encoded as two hex characters. */
p = buf;
- for (i = 0; i < todo; i++)
+ if ((i = hex2bin (p, myaddr, todo)) < todo)
{
- if (p[0] == 0 || p[1] == 0)
- /* Reply is short. This means that we were able to read
- only part of what we wanted to. */
- return i + (origlen - len);
- myaddr[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
- p += 2;
+ /* Reply is short. This means that we were able to read
+ only part of what we wanted to. */
+ return i + (origlen - len);
}
myaddr += todo;
memaddr += todo;
/* Read or write LEN bytes from inferior memory at MEMADDR,
transferring to or from debugger address BUFFER. Write to inferior if
SHOULD_WRITE is nonzero. Returns length of data written or read; 0
- for error. */
-
-#ifndef REMOTE_TRANSLATE_XFER_ADDRESS
-#define REMOTE_TRANSLATE_XFER_ADDRESS(MEM_ADDR, MEM_LEN, TARG_ADDR, TARG_LEN) \
- (*(TARG_ADDR) = (MEM_ADDR), *(TARG_LEN) = (MEM_LEN))
-#endif
-
-/* ARGSUSED */
-static int
-remote_xfer_memory (mem_addr, buffer, mem_len, should_write, target)
- CORE_ADDR mem_addr;
- char *buffer;
- int mem_len;
- int should_write;
- struct target_ops *target; /* ignored */
-{
- CORE_ADDR targ_addr;
- int targ_len;
- REMOTE_TRANSLATE_XFER_ADDRESS (mem_addr, mem_len, &targ_addr, &targ_len);
- if (targ_len <= 0)
- return 0;
-
- return dcache_xfer_memory (remote_dcache, targ_addr, buffer,
- targ_len, should_write);
-}
-
-
-#if 0
-/* Enable after 4.12. */
-
-void
-remote_search (len, data, mask, startaddr, increment, lorange, hirange
- addr_found, data_found)
- int len;
- char *data;
- char *mask;
- CORE_ADDR startaddr;
- int increment;
- CORE_ADDR lorange;
- CORE_ADDR hirange;
- CORE_ADDR *addr_found;
- char *data_found;
-{
- if (increment == -4 && len == 4)
- {
- long mask_long, data_long;
- long data_found_long;
- CORE_ADDR addr_we_found;
- char *buf = alloca (PBUFSIZ);
- long returned_long[2];
- char *p;
+ for error. TARGET is unused. */
- mask_long = extract_unsigned_integer (mask, len);
- data_long = extract_unsigned_integer (data, len);
- sprintf (buf, "t%x:%x,%x", startaddr, data_long, mask_long);
- putpkt (buf);
- getpkt (buf, 0);
- if (buf[0] == '\0')
- {
- /* The stub doesn't support the 't' request. We might want to
- remember this fact, but on the other hand the stub could be
- switched on us. Maybe we should remember it only until
- the next "target remote". */
- generic_search (len, data, mask, startaddr, increment, lorange,
- hirange, addr_found, data_found);
- return;
- }
+static int
+remote_xfer_memory (CORE_ADDR mem_addr, char *buffer, int mem_len,
+ int should_write, struct mem_attrib *attrib,
+ struct target_ops *target)
+{
+ CORE_ADDR targ_addr;
+ int targ_len;
+ int res;
- if (buf[0] == 'E')
- /* There is no correspondance between what the remote protocol uses
- for errors and errno codes. We would like a cleaner way of
- representing errors (big enough to include errno codes, bfd_error
- codes, and others). But for now just use EIO. */
- memory_error (EIO, startaddr);
- p = buf;
- addr_we_found = 0;
- while (*p != '\0' && *p != ',')
- addr_we_found = (addr_we_found << 4) + fromhex (*p++);
- if (*p == '\0')
- error ("Protocol error: short return for search");
-
- data_found_long = 0;
- while (*p != '\0' && *p != ',')
- data_found_long = (data_found_long << 4) + fromhex (*p++);
- /* Ignore anything after this comma, for future extensions. */
-
- if (addr_we_found < lorange || addr_we_found >= hirange)
- {
- *addr_found = 0;
- return;
- }
+ /* Should this be the selected frame? */
+ gdbarch_remote_translate_xfer_address (current_gdbarch, current_regcache,
+ mem_addr, mem_len,
+ &targ_addr, &targ_len);
+ if (targ_len <= 0)
+ return 0;
- *addr_found = addr_we_found;
- *data_found = store_unsigned_integer (data_we_found, len);
- return;
- }
- generic_search (len, data, mask, startaddr, increment, lorange,
- hirange, addr_found, data_found);
+ if (should_write)
+ res = remote_write_bytes (targ_addr, buffer, targ_len);
+ else
+ res = remote_read_bytes (targ_addr, buffer, targ_len);
+
+ return res;
}
-#endif /* 0 */
-\f
+
static void
-remote_files_info (ignore)
- struct target_ops *ignore;
+remote_files_info (struct target_ops *ignore)
{
puts_filtered ("Debugging a target over a serial line.\n");
}
/* Read a single character from the remote end, masking it down to 7 bits. */
static int
-readchar (timeout)
- int timeout;
+readchar (int timeout)
{
int ch;
- ch = SERIAL_READCHAR (remote_desc, timeout);
+ ch = serial_readchar (remote_desc, timeout);
+
+ if (ch >= 0)
+ return (ch & 0x7f);
- switch (ch)
+ switch ((enum serial_rc) ch)
{
case SERIAL_EOF:
+ target_mourn_inferior ();
error ("Remote connection closed");
+ /* no return */
case SERIAL_ERROR:
perror_with_name ("Remote communication error");
+ /* no return */
case SERIAL_TIMEOUT:
- return ch;
- default:
- return ch & 0x7f;
+ break;
}
+ return ch;
}
/* Send the command in BUF to the remote machine, and read the reply
into BUF. Report an error if we get an error reply. */
static void
-remote_send (buf)
- char *buf;
+remote_send (char *buf,
+ long sizeof_buf)
{
putpkt (buf);
- getpkt (buf, 0);
+ getpkt (buf, sizeof_buf, 0);
if (buf[0] == 'E')
error ("Remote failure reply: %s", buf);
string notation. */
static void
-print_packet (buf)
- char *buf;
+print_packet (char *buf)
{
puts_filtered ("\"");
- while (*buf)
- gdb_printchar (*buf++, gdb_stdout, '"');
+ fputstr_filtered (buf, '"', gdb_stdout);
puts_filtered ("\"");
}
int
-putpkt (buf)
- char *buf;
+putpkt (char *buf)
{
return putpkt_binary (buf, strlen (buf));
}
/* Send a packet to the remote machine, with error checking. The data
- of the packet is in BUF. The string in BUF can be at most PBUFSIZ - 5
+ of the packet is in BUF. The string in BUF can be at most (rs->remote_packet_size) - 5
to account for the $, # and checksum, and for a possible /0 if we are
debugging (remote_debug) and want to print the sent packet as a string */
static int
-putpkt_binary (buf, cnt)
- char *buf;
- int cnt;
+putpkt_binary (char *buf, int cnt)
{
+ struct remote_state *rs = get_remote_state ();
int i;
unsigned char csum = 0;
- char *buf2 = alloca (PBUFSIZ);
- char *junkbuf = alloca (PBUFSIZ);
+ char *buf2 = alloca (cnt + 6);
+ long sizeof_junkbuf = (rs->remote_packet_size);
+ char *junkbuf = alloca (sizeof_junkbuf);
int ch;
int tcount = 0;
/* Copy the packet into buffer BUF2, encapsulating it
and giving it a checksum. */
- if (cnt > (int) sizeof (buf2) - 5) /* Prosanity check */
- abort ();
-
p = buf2;
*p++ = '$';
if (remote_debug)
{
*p = '\0';
- fprintf_unfiltered (gdb_stdlog, "Sending packet: %s...", buf2);
+ fprintf_unfiltered (gdb_stdlog, "Sending packet: ");
+ fputstrn_unfiltered (buf2, p - buf2, 0, gdb_stdlog);
+ fprintf_unfiltered (gdb_stdlog, "...");
gdb_flush (gdb_stdlog);
}
- if (SERIAL_WRITE (remote_desc, buf2, p - buf2))
+ if (serial_write (remote_desc, buf2, p - buf2))
perror_with_name ("putpkt: write failed");
/* read until either a timeout occurs (-2) or '+' is read */
{
ch = readchar (remote_timeout);
- if (remote_debug)
+ if (remote_debug)
{
switch (ch)
{
case '+':
+ case '-':
case SERIAL_TIMEOUT:
case '$':
if (started_error_output)
if (remote_debug)
fprintf_unfiltered (gdb_stdlog, "Ack\n");
return 1;
+ case '-':
+ if (remote_debug)
+ fprintf_unfiltered (gdb_stdlog, "Nak\n");
case SERIAL_TIMEOUT:
- tcount ++;
+ tcount++;
if (tcount > 3)
return 0;
break; /* Retransmit buffer */
case '$':
{
- /* It's probably an old response, and we're out of sync.
- Just gobble up the packet and ignore it. */
- getpkt (junkbuf, 0);
- continue; /* Now, go look for + */
+ if (remote_debug)
+ fprintf_unfiltered (gdb_stdlog, "Packet instead of Ack, ignoring it\n");
+ /* It's probably an old response, and we're out of sync.
+ Just gobble up the packet and ignore it. */
+ read_frame (junkbuf, sizeof_junkbuf);
+ continue; /* Now, go look for + */
}
default:
if (remote_debug)
#if 0
/* This is wrong. If doing a long backtrace, the user should be
- able to get out next time we call QUIT, without anything as
- violent as interrupt_query. If we want to provide a way out of
- here without getting to the next QUIT, it should be based on
- hitting ^C twice as in remote_wait. */
+ able to get out next time we call QUIT, without anything as
+ violent as interrupt_query. If we want to provide a way out of
+ here without getting to the next QUIT, it should be based on
+ hitting ^C twice as in remote_wait. */
if (quit_flag)
{
quit_flag = 0;
}
}
-static int remote_cisco_mode;
-
-static void remote_cisco_expand (src, dest)
- char *src;
- char *dest;
-{
- int i;
- int repeat;
-
- do {
- if (*src == '*')
- {
- repeat = (fromhex (src[1]) << 4) + fromhex (src[2]);
- for (i = 0; i < repeat; i++)
- {
- *dest++ = *(src-1);
- }
- src += 2;
- }
- else
- {
- *dest++ = *src;
- }
- } while (*src++);
-}
-
/* Come here after finding the start of the frame. Collect the rest
into BUF, verifying the checksum, length, and handling run-length
- compression. Returns 0 on any error, 1 on success. */
+ compression. No more than sizeof_buf-1 characters are read so that
+ the buffer can be NUL terminated.
-static int
-read_frame (buf)
- char *buf;
+ Returns -1 on error, number of characters in buffer (ignoring the
+ trailing NULL) on success. (could be extended to return one of the
+ SERIAL status indications). */
+
+static long
+read_frame (char *buf,
+ long sizeof_buf)
{
unsigned char csum;
- char *bp;
+ long bc;
int c;
csum = 0;
- bp = buf;
+ bc = 0;
while (1)
{
+ /* ASSERT (bc < sizeof_buf - 1) - space for trailing NUL */
c = readchar (remote_timeout);
-
switch (c)
{
case SERIAL_TIMEOUT:
if (remote_debug)
fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
- return 0;
+ return -1;
case '$':
if (remote_debug)
fputs_filtered ("Saw new packet start in middle of old one\n",
gdb_stdlog);
- return 0; /* Start a new packet, count retries */
+ return -1; /* Start a new packet, count retries */
case '#':
{
unsigned char pktcsum;
+ int check_0 = 0;
+ int check_1 = 0;
- *bp = '\000';
+ buf[bc] = '\0';
- pktcsum = fromhex (readchar (remote_timeout)) << 4;
- pktcsum |= fromhex (readchar (remote_timeout));
+ check_0 = readchar (remote_timeout);
+ if (check_0 >= 0)
+ check_1 = readchar (remote_timeout);
- if (csum == pktcsum)
+ if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
{
- if (remote_cisco_mode) /* variant run-length-encoding */
- {
- char *tmp_buf = alloca (PBUFSIZ);
-
- remote_cisco_expand (buf, tmp_buf);
- strcpy (buf, tmp_buf);
- }
- return 1;
+ if (remote_debug)
+ fputs_filtered ("Timeout in checksum, retrying\n", gdb_stdlog);
+ return -1;
+ }
+ else if (check_0 < 0 || check_1 < 0)
+ {
+ if (remote_debug)
+ fputs_filtered ("Communication error in checksum\n", gdb_stdlog);
+ return -1;
}
- if (remote_debug)
+ pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
+ if (csum == pktcsum)
+ return bc;
+
+ if (remote_debug)
{
fprintf_filtered (gdb_stdlog,
- "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
+ "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
pktcsum, csum);
fputs_filtered (buf, gdb_stdlog);
fputs_filtered ("\n", gdb_stdlog);
}
- return 0;
+ /* Number of characters in buffer ignoring trailing
+ NUL. */
+ return -1;
}
case '*': /* Run length encoding */
- if (remote_cisco_mode == 0) /* variant run-length-encoding */
- {
- csum += c;
- c = readchar (remote_timeout);
- csum += c;
- c = c - ' ' + 3; /* Compute repeat count */
+ {
+ int repeat;
+ csum += c;
- if (c > 0 && c < 255 && bp + c - 1 < buf + PBUFSIZ - 1)
- {
- memset (bp, *(bp - 1), c);
- bp += c;
- continue;
- }
+ c = readchar (remote_timeout);
+ csum += c;
+ repeat = c - ' ' + 3; /* Compute repeat count */
- *bp = '\0';
- printf_filtered ("Repeat count %d too large for buffer: ", c);
- puts_filtered (buf);
- puts_filtered ("\n");
- return 0;
- }
- /* else fall thru to treat like default */
+ /* The character before ``*'' is repeated. */
+
+ if (repeat > 0 && repeat <= 255
+ && bc > 0
+ && bc + repeat - 1 < sizeof_buf - 1)
+ {
+ memset (&buf[bc], buf[bc - 1], repeat);
+ bc += repeat;
+ continue;
+ }
+
+ buf[bc] = '\0';
+ printf_filtered ("Repeat count %d too large for buffer: ", repeat);
+ puts_filtered (buf);
+ puts_filtered ("\n");
+ return -1;
+ }
default:
- if (bp < buf + PBUFSIZ - 1)
+ if (bc < sizeof_buf - 1)
{
- *bp++ = c;
+ buf[bc++] = c;
csum += c;
continue;
}
- *bp = '\0';
+ buf[bc] = '\0';
puts_filtered ("Remote packet too long: ");
puts_filtered (buf);
puts_filtered ("\n");
- return 0;
+ return -1;
}
}
}
/* Read a packet from the remote machine, with error checking, and
- store it in BUF. BUF is expected to be of size PBUFSIZ. If
- FOREVER, wait forever rather than timing out; this is used while
- the target is executing user code. */
-
+ store it in BUF. If FOREVER, wait forever rather than timing out;
+ this is used (in synchronous mode) to wait for a target that is is
+ executing user code to stop. */
+/* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
+ don't have to change all the calls to getpkt to deal with the
+ return value, because at the moment I don't know what the right
+ thing to do it for those. */
void
-getpkt (buf, forever)
- char *buf;
- int forever;
+getpkt (char *buf,
+ long sizeof_buf,
+ int forever)
+{
+ int timed_out;
+
+ timed_out = getpkt_sane (buf, sizeof_buf, forever);
+}
+
+
+/* Read a packet from the remote machine, with error checking, and
+ store it in BUF. If FOREVER, wait forever rather than timing out;
+ this is used (in synchronous mode) to wait for a target that is is
+ executing user code to stop. If FOREVER == 0, this function is
+ allowed to time out gracefully and return an indication of this to
+ the caller. */
+static int
+getpkt_sane (char *buf,
+ long sizeof_buf,
+ int forever)
{
int c;
int tries;
int timeout;
int val;
- strcpy (buf,"timeout");
+ strcpy (buf, "timeout");
if (forever)
{
for (tries = 1; tries <= MAX_TRIES; tries++)
{
/* This can loop forever if the remote side sends us characters
- continuously, but if it pauses, we'll get a zero from readchar
- because of timeout. Then we'll count that as a retry. */
+ continuously, but if it pauses, we'll get a zero from readchar
+ because of timeout. Then we'll count that as a retry. */
/* Note that we will only wait forever prior to the start of a packet.
- After that, we expect characters to arrive at a brisk pace. They
- should show up within remote_timeout intervals. */
+ After that, we expect characters to arrive at a brisk pace. They
+ should show up within remote_timeout intervals. */
do
{
if (c == SERIAL_TIMEOUT)
{
- if (forever) /* Watchdog went off. Kill the target. */
+ if (forever) /* Watchdog went off? Kill the target. */
{
+ QUIT;
target_mourn_inferior ();
error ("Watchdog has expired. Target detached.\n");
}
/* We've found the start of a packet, now collect the data. */
- val = read_frame (buf);
+ val = read_frame (buf, sizeof_buf);
- if (val == 1)
+ if (val >= 0)
{
if (remote_debug)
- fprintf_unfiltered (gdb_stdlog, "Packet received: %s\n", buf);
- SERIAL_WRITE (remote_desc, "+", 1);
- return;
+ {
+ fprintf_unfiltered (gdb_stdlog, "Packet received: ");
+ fputstr_unfiltered (buf, 0, gdb_stdlog);
+ fprintf_unfiltered (gdb_stdlog, "\n");
+ }
+ serial_write (remote_desc, "+", 1);
+ return 0;
}
/* Try the whole thing again. */
retry:
- SERIAL_WRITE (remote_desc, "-", 1);
+ serial_write (remote_desc, "-", 1);
}
/* We have tried hard enough, and just can't receive the packet. Give up. */
printf_unfiltered ("Ignoring packet error, continuing...\n");
- SERIAL_WRITE (remote_desc, "+", 1);
+ serial_write (remote_desc, "+", 1);
+ return 1;
}
\f
static void
-remote_kill ()
+remote_kill (void)
+{
+ /* For some mysterious reason, wait_for_inferior calls kill instead of
+ mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
+ if (kill_kludge)
+ {
+ kill_kludge = 0;
+ target_mourn_inferior ();
+ return;
+ }
+
+ /* Use catch_errors so the user can quit from gdb even when we aren't on
+ speaking terms with the remote system. */
+ catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
+
+ /* Don't wait for it to die. I'm not really sure it matters whether
+ we do or not. For the existing stubs, kill is a noop. */
+ target_mourn_inferior ();
+}
+
+/* Async version of remote_kill. */
+static void
+remote_async_kill (void)
{
+ /* Unregister the file descriptor from the event loop. */
+ if (target_is_async_p ())
+ serial_async (remote_desc, NULL, 0);
+
/* For some mysterious reason, wait_for_inferior calls kill instead of
mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
if (kill_kludge)
/* Use catch_errors so the user can quit from gdb even when we aren't on
speaking terms with the remote system. */
- catch_errors ((catch_errors_ftype*) putpkt, "k", "", RETURN_MASK_ERROR);
+ catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
/* Don't wait for it to die. I'm not really sure it matters whether
we do or not. For the existing stubs, kill is a noop. */
}
static void
-remote_mourn ()
+remote_mourn (void)
{
remote_mourn_1 (&remote_ops);
}
static void
-extended_remote_mourn ()
+remote_async_mourn (void)
+{
+ remote_mourn_1 (&remote_async_ops);
+}
+
+static void
+extended_remote_mourn (void)
{
/* We do _not_ want to mourn the target like this; this will
remove the extended remote target from the target stack,
- and the next time the user says "run" it'll fail.
+ and the next time the user says "run" it'll fail.
FIXME: What is the right thing to do here? */
#if 0
/* Worker function for remote_mourn. */
static void
-remote_mourn_1 (target)
- struct target_ops *target;
+remote_mourn_1 (struct target_ops *target)
{
unpush_target (target);
generic_mourn_inferior ();
/* In the extended protocol we want to be able to do things like
"run" and have them basically work as expected. So we need
- a special create_inferior function.
+ a special create_inferior function.
FIXME: One day add support for changing the exec file
we're debugging, arguments and an environment. */
static void
-extended_remote_create_inferior (exec_file, args, env)
- char *exec_file;
- char *args;
- char **env;
+extended_remote_create_inferior (char *exec_file, char *args, char **env)
{
/* Rip out the breakpoints; we'll reinsert them after restarting
the remote server. */
proceed (-1, TARGET_SIGNAL_0, 0);
}
+/* Async version of extended_remote_create_inferior. */
+static void
+extended_remote_async_create_inferior (char *exec_file, char *args, char **env)
+{
+ /* Rip out the breakpoints; we'll reinsert them after restarting
+ the remote server. */
+ remove_breakpoints ();
+
+ /* If running asynchronously, register the target file descriptor
+ with the event loop. */
+ if (event_loop_p && target_can_async_p ())
+ target_async (inferior_event_handler, 0);
+
+ /* Now restart the remote server. */
+ extended_remote_restart ();
+
+ /* Now put the breakpoints back in. This way we're safe if the
+ restart function works via a unix fork on the remote side. */
+ insert_breakpoints ();
+
+ /* Clean up from the last time we were running. */
+ clear_proceed_status ();
+
+ /* Let the remote process run. */
+ proceed (-1, TARGET_SIGNAL_0, 0);
+}
\f
-/* On some machines, e.g. 68k, we may use a different breakpoint instruction
- than other targets; in those use REMOTE_BREAKPOINT instead of just
- BREAKPOINT. Also, bi-endian targets may define LITTLE_REMOTE_BREAKPOINT
- and BIG_REMOTE_BREAKPOINT. If none of these are defined, we just call
- the standard routines that are in mem-break.c. */
-
-/* FIXME, these ought to be done in a more dynamic fashion. For instance,
- the choice of breakpoint instruction affects target program design and
- vice versa, and by making it user-tweakable, the special code here
- goes away and we need fewer special GDB configurations. */
-
-#if defined (LITTLE_REMOTE_BREAKPOINT) && defined (BIG_REMOTE_BREAKPOINT) && !defined(REMOTE_BREAKPOINT)
-#define REMOTE_BREAKPOINT
+
+/* On some machines, e.g. 68k, we may use a different breakpoint
+ instruction than other targets; in those use
+ DEPRECATED_REMOTE_BREAKPOINT instead of just BREAKPOINT_FROM_PC.
+ Also, bi-endian targets may define
+ DEPRECATED_LITTLE_REMOTE_BREAKPOINT and
+ DEPRECATED_BIG_REMOTE_BREAKPOINT. If none of these are defined, we
+ just call the standard routines that are in mem-break.c. */
+
+/* NOTE: cagney/2003-06-08: This is silly. A remote and simulator
+ target should use an identical BREAKPOINT_FROM_PC. As for native,
+ the ARCH-OS-tdep.c code can override the default. */
+
+#if defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && defined (DEPRECATED_BIG_REMOTE_BREAKPOINT) && !defined(DEPRECATED_REMOTE_BREAKPOINT)
+#define DEPRECATED_REMOTE_BREAKPOINT
+#endif
+
+#ifdef DEPRECATED_REMOTE_BREAKPOINT
+
+/* If the target isn't bi-endian, just pretend it is. */
+#if !defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && !defined (DEPRECATED_BIG_REMOTE_BREAKPOINT)
+#define DEPRECATED_LITTLE_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
+#define DEPRECATED_BIG_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
+#endif
+
+static unsigned char big_break_insn[] = DEPRECATED_BIG_REMOTE_BREAKPOINT;
+static unsigned char little_break_insn[] = DEPRECATED_LITTLE_REMOTE_BREAKPOINT;
+
+#endif /* DEPRECATED_REMOTE_BREAKPOINT */
+
+/* Insert a breakpoint on targets that don't have any better
+ breakpoint support. We read the contents of the target location
+ and stash it, then overwrite it with a breakpoint instruction.
+ ADDR is the target location in the target machine. CONTENTS_CACHE
+ is a pointer to memory allocated for saving the target contents.
+ It is guaranteed by the caller to be long enough to save the number
+ of bytes returned by BREAKPOINT_FROM_PC. */
+
+static int
+remote_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
+{
+ struct remote_state *rs = get_remote_state ();
+#ifdef DEPRECATED_REMOTE_BREAKPOINT
+ int val;
#endif
+ int bp_size;
+
+ /* Try the "Z" s/w breakpoint packet if it is not already disabled.
+ If it succeeds, then set the support to PACKET_ENABLE. If it
+ fails, and the user has explicitly requested the Z support then
+ report an error, otherwise, mark it disabled and go on. */
+
+ if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE)
+ {
+ char *buf = alloca (rs->remote_packet_size);
+ char *p = buf;
+
+ addr = remote_address_masked (addr);
+ *(p++) = 'Z';
+ *(p++) = '0';
+ *(p++) = ',';
+ p += hexnumstr (p, (ULONGEST) addr);
+ BREAKPOINT_FROM_PC (&addr, &bp_size);
+ sprintf (p, ",%d", bp_size);
+
+ putpkt (buf);
+ getpkt (buf, (rs->remote_packet_size), 0);
+
+ switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_SOFTWARE_BP]))
+ {
+ case PACKET_ERROR:
+ return -1;
+ case PACKET_OK:
+ return 0;
+ case PACKET_UNKNOWN:
+ break;
+ }
+ }
+
+#ifdef DEPRECATED_REMOTE_BREAKPOINT
+ val = target_read_memory (addr, contents_cache, sizeof big_break_insn);
+
+ if (val == 0)
+ {
+ if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
+ val = target_write_memory (addr, (char *) big_break_insn,
+ sizeof big_break_insn);
+ else
+ val = target_write_memory (addr, (char *) little_break_insn,
+ sizeof little_break_insn);
+ }
+
+ return val;
+#else
+ return memory_insert_breakpoint (addr, contents_cache);
+#endif /* DEPRECATED_REMOTE_BREAKPOINT */
+}
+
+static int
+remote_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
+{
+ struct remote_state *rs = get_remote_state ();
+ int bp_size;
+
+ if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE)
+ {
+ char *buf = alloca (rs->remote_packet_size);
+ char *p = buf;
+
+ *(p++) = 'z';
+ *(p++) = '0';
+ *(p++) = ',';
+
+ addr = remote_address_masked (addr);
+ p += hexnumstr (p, (ULONGEST) addr);
+ BREAKPOINT_FROM_PC (&addr, &bp_size);
+ sprintf (p, ",%d", bp_size);
+
+ putpkt (buf);
+ getpkt (buf, (rs->remote_packet_size), 0);
+
+ return (buf[0] == 'E');
+ }
+
+#ifdef DEPRECATED_REMOTE_BREAKPOINT
+ return target_write_memory (addr, contents_cache, sizeof big_break_insn);
+#else
+ return memory_remove_breakpoint (addr, contents_cache);
+#endif /* DEPRECATED_REMOTE_BREAKPOINT */
+}
+
+static int
+watchpoint_to_Z_packet (int type)
+{
+ switch (type)
+ {
+ case hw_write:
+ return 2;
+ break;
+ case hw_read:
+ return 3;
+ break;
+ case hw_access:
+ return 4;
+ break;
+ default:
+ internal_error (__FILE__, __LINE__,
+ "hw_bp_to_z: bad watchpoint type %d", type);
+ }
+}
+
+static int
+remote_insert_watchpoint (CORE_ADDR addr, int len, int type)
+{
+ struct remote_state *rs = get_remote_state ();
+ char *buf = alloca (rs->remote_packet_size);
+ char *p;
+ enum Z_packet_type packet = watchpoint_to_Z_packet (type);
+
+ if (remote_protocol_Z[packet].support == PACKET_DISABLE)
+ error ("Can't set hardware watchpoints without the '%s' (%s) packet\n",
+ remote_protocol_Z[packet].name,
+ remote_protocol_Z[packet].title);
-#ifdef REMOTE_BREAKPOINT
+ sprintf (buf, "Z%x,", packet);
+ p = strchr (buf, '\0');
+ addr = remote_address_masked (addr);
+ p += hexnumstr (p, (ULONGEST) addr);
+ sprintf (p, ",%x", len);
+
+ putpkt (buf);
+ getpkt (buf, (rs->remote_packet_size), 0);
+
+ switch (packet_ok (buf, &remote_protocol_Z[packet]))
+ {
+ case PACKET_ERROR:
+ case PACKET_UNKNOWN:
+ return -1;
+ case PACKET_OK:
+ return 0;
+ }
+ internal_error (__FILE__, __LINE__,
+ "remote_insert_watchpoint: reached end of function");
+}
+
+
+static int
+remote_remove_watchpoint (CORE_ADDR addr, int len, int type)
+{
+ struct remote_state *rs = get_remote_state ();
+ char *buf = alloca (rs->remote_packet_size);
+ char *p;
+ enum Z_packet_type packet = watchpoint_to_Z_packet (type);
+
+ if (remote_protocol_Z[packet].support == PACKET_DISABLE)
+ error ("Can't clear hardware watchpoints without the '%s' (%s) packet\n",
+ remote_protocol_Z[packet].name,
+ remote_protocol_Z[packet].title);
+
+ sprintf (buf, "z%x,", packet);
+ p = strchr (buf, '\0');
+ addr = remote_address_masked (addr);
+ p += hexnumstr (p, (ULONGEST) addr);
+ sprintf (p, ",%x", len);
+ putpkt (buf);
+ getpkt (buf, (rs->remote_packet_size), 0);
+
+ switch (packet_ok (buf, &remote_protocol_Z[packet]))
+ {
+ case PACKET_ERROR:
+ case PACKET_UNKNOWN:
+ return -1;
+ case PACKET_OK:
+ return 0;
+ }
+ internal_error (__FILE__, __LINE__,
+ "remote_remove_watchpoint: reached end of function");
+}
+
+
+int remote_hw_watchpoint_limit = -1;
+int remote_hw_breakpoint_limit = -1;
+
+static int
+remote_check_watch_resources (int type, int cnt, int ot)
+{
+ if (type == bp_hardware_breakpoint)
+ {
+ if (remote_hw_breakpoint_limit == 0)
+ return 0;
+ else if (remote_hw_breakpoint_limit < 0)
+ return 1;
+ else if (cnt <= remote_hw_breakpoint_limit)
+ return 1;
+ }
+ else
+ {
+ if (remote_hw_watchpoint_limit == 0)
+ return 0;
+ else if (remote_hw_watchpoint_limit < 0)
+ return 1;
+ else if (ot)
+ return -1;
+ else if (cnt <= remote_hw_watchpoint_limit)
+ return 1;
+ }
+ return -1;
+}
+
+static int
+remote_stopped_by_watchpoint (void)
+{
+ return remote_stopped_by_watchpoint_p;
+}
+
+static CORE_ADDR
+remote_stopped_data_address (void)
+{
+ if (remote_stopped_by_watchpoint ())
+ return remote_watch_data_address;
+ return (CORE_ADDR)0;
+}
+
+
+static int
+remote_insert_hw_breakpoint (CORE_ADDR addr, char *shadow)
+{
+ int len = 0;
+ struct remote_state *rs = get_remote_state ();
+ char *buf = alloca (rs->remote_packet_size);
+ char *p = buf;
+
+ /* The length field should be set to the size of a breakpoint
+ instruction. */
+
+ BREAKPOINT_FROM_PC (&addr, &len);
+
+ if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE)
+ error ("Can't set hardware breakpoint without the '%s' (%s) packet\n",
+ remote_protocol_Z[Z_PACKET_HARDWARE_BP].name,
+ remote_protocol_Z[Z_PACKET_HARDWARE_BP].title);
+
+ *(p++) = 'Z';
+ *(p++) = '1';
+ *(p++) = ',';
+
+ addr = remote_address_masked (addr);
+ p += hexnumstr (p, (ULONGEST) addr);
+ sprintf (p, ",%x", len);
+
+ putpkt (buf);
+ getpkt (buf, (rs->remote_packet_size), 0);
+
+ switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP]))
+ {
+ case PACKET_ERROR:
+ case PACKET_UNKNOWN:
+ return -1;
+ case PACKET_OK:
+ return 0;
+ }
+ internal_error (__FILE__, __LINE__,
+ "remote_insert_hw_breakpoint: reached end of function");
+}
+
+
+static int
+remote_remove_hw_breakpoint (CORE_ADDR addr, char *shadow)
+{
+ int len;
+ struct remote_state *rs = get_remote_state ();
+ char *buf = alloca (rs->remote_packet_size);
+ char *p = buf;
-/* If the target isn't bi-endian, just pretend it is. */
-#if !defined (LITTLE_REMOTE_BREAKPOINT) && !defined (BIG_REMOTE_BREAKPOINT)
-#define LITTLE_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
-#define BIG_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
-#endif
+ /* The length field should be set to the size of a breakpoint
+ instruction. */
-static unsigned char big_break_insn[] = BIG_REMOTE_BREAKPOINT;
-static unsigned char little_break_insn[] = LITTLE_REMOTE_BREAKPOINT;
+ BREAKPOINT_FROM_PC (&addr, &len);
-#endif /* REMOTE_BREAKPOINT */
+ if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE)
+ error ("Can't clear hardware breakpoint without the '%s' (%s) packet\n",
+ remote_protocol_Z[Z_PACKET_HARDWARE_BP].name,
+ remote_protocol_Z[Z_PACKET_HARDWARE_BP].title);
-/* Insert a breakpoint on targets that don't have any better breakpoint
- support. We read the contents of the target location and stash it,
- then overwrite it with a breakpoint instruction. ADDR is the target
- location in the target machine. CONTENTS_CACHE is a pointer to
- memory allocated for saving the target contents. It is guaranteed
- by the caller to be long enough to save sizeof BREAKPOINT bytes (this
- is accomplished via BREAKPOINT_MAX). */
+ *(p++) = 'z';
+ *(p++) = '1';
+ *(p++) = ',';
-static int
-remote_insert_breakpoint (addr, contents_cache)
- CORE_ADDR addr;
- char *contents_cache;
-{
-#ifdef REMOTE_BREAKPOINT
- int val;
+ addr = remote_address_masked (addr);
+ p += hexnumstr (p, (ULONGEST) addr);
+ sprintf (p, ",%x", len);
- val = target_read_memory (addr, contents_cache, sizeof big_break_insn);
+ putpkt(buf);
+ getpkt (buf, (rs->remote_packet_size), 0);
- if (val == 0)
+ switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP]))
{
- if (TARGET_BYTE_ORDER == BIG_ENDIAN)
- val = target_write_memory (addr, (char *) big_break_insn,
- sizeof big_break_insn);
- else
- val = target_write_memory (addr, (char *) little_break_insn,
- sizeof little_break_insn);
+ case PACKET_ERROR:
+ case PACKET_UNKNOWN:
+ return -1;
+ case PACKET_OK:
+ return 0;
}
-
- return val;
-#else
- return memory_insert_breakpoint (addr, contents_cache);
-#endif /* REMOTE_BREAKPOINT */
-}
-
-static int
-remote_remove_breakpoint (addr, contents_cache)
- CORE_ADDR addr;
- char *contents_cache;
-{
-#ifdef REMOTE_BREAKPOINT
- return target_write_memory (addr, contents_cache, sizeof big_break_insn);
-#else
- return memory_remove_breakpoint (addr, contents_cache);
-#endif /* REMOTE_BREAKPOINT */
+ internal_error (__FILE__, __LINE__,
+ "remote_remove_hw_breakpoint: reached end of function");
}
/* Some targets are only capable of doing downloads, and afterwards
already..." message. Usually a call to pop_target() suffices. */
void
-push_remote_target (name, from_tty)
- char *name;
- int from_tty;
+push_remote_target (char *name, int from_tty)
{
printf_filtered ("Switching to remote protocol\n");
remote_open (name, from_tty);
}
-/* Other targets want to use the entire remote serial module but with
- certain remote_ops overridden. */
-
-void
-open_remote_target (name, from_tty, target, extended_p)
- char *name;
- int from_tty;
- struct target_ops *target;
- int extended_p;
-{
- printf_filtered ("Selecting the %sremote protocol\n",
- (extended_p ? "extended-" : ""));
- remote_open_1 (name, from_tty, target, extended_p);
-}
-
/* Table used by the crc32 function to calcuate the checksum. */
-static unsigned long crc32_table[256] = {0, 0};
+static unsigned long crc32_table[256] =
+{0, 0};
static unsigned long
-crc32 (buf, len, crc)
- unsigned char *buf;
- int len;
- unsigned int crc;
+crc32 (unsigned char *buf, int len, unsigned int crc)
{
- if (! crc32_table[1])
+ if (!crc32_table[1])
{
/* Initialize the CRC table and the decoding table. */
int i, j;
unsigned int c;
for (i = 0; i < 256; i++)
- {
- for (c = i << 24, j = 8; j > 0; --j)
- c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
- crc32_table[i] = c;
- }
+ {
+ for (c = i << 24, j = 8; j > 0; --j)
+ c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
+ crc32_table[i] = c;
+ }
}
while (len--)
Useful for verifying the image on the target against the exec file.
Depends on the target understanding the new "qCRC:" request. */
+/* FIXME: cagney/1999-10-26: This command should be broken down into a
+ target method (target verify memory) and generic version of the
+ actual command. This will allow other high-level code (especially
+ generic_load()) to make use of this target functionality. */
+
static void
-compare_sections_command (args, from_tty)
- char *args;
- int from_tty;
+compare_sections_command (char *args, int from_tty)
{
+ struct remote_state *rs = get_remote_state ();
asection *s;
unsigned long host_crc, target_crc;
extern bfd *exec_bfd;
struct cleanup *old_chain;
char *tmp;
char *sectdata;
- char *sectname;
- char *buf = alloca (PBUFSIZ);
+ const char *sectname;
+ char *buf = alloca (rs->remote_packet_size);
bfd_size_type size;
bfd_vma lma;
int matched = 0;
strcmp (current_target.to_shortname, "remote") != 0)
error ("command can only be used with remote target");
- for (s = exec_bfd->sections; s; s = s->next)
+ for (s = exec_bfd->sections; s; s = s->next)
{
if (!(s->flags & SEC_LOAD))
- continue; /* skip non-loadable section */
+ continue; /* skip non-loadable section */
size = bfd_get_section_size_before_reloc (s);
if (size == 0)
- continue; /* skip zero-length section */
+ continue; /* skip zero-length section */
- sectname = (char *) bfd_get_section_name (exec_bfd, s);
+ sectname = bfd_get_section_name (exec_bfd, s);
if (args && strcmp (args, sectname) != 0)
- continue; /* not the section selected by user */
+ continue; /* not the section selected by user */
- matched = 1; /* do this section */
+ matched = 1; /* do this section */
lma = s->lma;
/* FIXME: assumes lma can fit into long */
sprintf (buf, "qCRC:%lx,%lx", (long) lma, (long) size);
/* be clever; compute the host_crc before waiting for target reply */
sectdata = xmalloc (size);
- old_chain = make_cleanup (free, sectdata);
+ old_chain = make_cleanup (xfree, sectdata);
bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff);
- getpkt (buf, 0);
+ getpkt (buf, (rs->remote_packet_size), 0);
if (buf[0] == 'E')
- error ("target memory fault, section %s, range 0x%08x -- 0x%08x",
- sectname, lma, lma + size);
+ error ("target memory fault, section %s, range 0x%s -- 0x%s",
+ sectname, paddr (lma), paddr (lma + size));
if (buf[0] != 'C')
error ("remote target does not support this operation");
for (target_crc = 0, tmp = &buf[1]; *tmp; tmp++)
target_crc = target_crc * 16 + fromhex (*tmp);
- printf_filtered ("Section %s, range 0x%08x -- 0x%08x: ",
- sectname, lma, lma + size);
+ printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
+ sectname, paddr (lma), paddr (lma + size));
if (host_crc == target_crc)
printf_filtered ("matched.\n");
else
- {
- printf_filtered ("MIS-MATCHED!\n");
- mismatched++;
- }
+ {
+ printf_filtered ("MIS-MATCHED!\n");
+ mismatched++;
+ }
do_cleanups (old_chain);
}
printf_filtered ("No loaded section named '%s'.\n", args);
}
-static int
-remote_query (query_type, buf, outbuf, bufsiz)
- int query_type;
- char *buf;
- char *outbuf;
- int *bufsiz;
+static LONGEST
+remote_xfer_partial (struct target_ops *ops, enum target_object object,
+ const char *annex, void *readbuf, const void *writebuf,
+ ULONGEST offset, LONGEST len)
{
+ struct remote_state *rs = get_remote_state ();
int i;
- char *buf2 = alloca (PBUFSIZ);
+ char *buf2 = alloca (rs->remote_packet_size);
char *p2 = &buf2[0];
- char *p = buf;
+ char query_type;
- if (! bufsiz)
- error ("null pointer to remote bufer size specified");
+ /* Only handle reads. */
+ if (writebuf != NULL || readbuf == NULL)
+ return -1;
- /* minimum outbuf size is PBUFSIZ - if bufsiz is not large enough let
- the caller know and return what the minimum size is */
- /* Note: a zero bufsiz can be used to query the minimum buffer size */
- if ( *bufsiz < PBUFSIZ )
+ /* Map pre-existing objects onto letters. DO NOT do this for new
+ objects!!! Instead specify new query packets. */
+ switch (object)
{
- *bufsiz = PBUFSIZ;
+ case TARGET_OBJECT_KOD:
+ query_type = 'K';
+ break;
+ case TARGET_OBJECT_AVR:
+ query_type = 'R';
+ break;
+
+ case TARGET_OBJECT_AUXV:
+ if (remote_protocol_qPart_auxv.support != PACKET_DISABLE)
+ {
+ unsigned int total = 0;
+ while (len > 0)
+ {
+ LONGEST n = min ((rs->remote_packet_size - 2) / 2, len);
+ snprintf (buf2, rs->remote_packet_size,
+ "qPart:auxv:read::%s,%s",
+ phex_nz (offset, sizeof offset),
+ phex_nz (n, sizeof n));
+ i = putpkt (buf2);
+ if (i < 0)
+ return total > 0 ? total : i;
+ buf2[0] = '\0';
+ getpkt (buf2, rs->remote_packet_size, 0);
+ if (packet_ok (buf2, &remote_protocol_qPart_auxv) != PACKET_OK)
+ return total > 0 ? total : -1;
+ if (buf2[0] == 'O' && buf2[1] == 'K' && buf2[2] == '\0')
+ break; /* Got EOF indicator. */
+ /* Got some data. */
+ i = hex2bin (buf2, readbuf, len);
+ if (i > 0)
+ {
+ readbuf = (void *) ((char *) readbuf + i);
+ offset += i;
+ len -= i;
+ total += i;
+ }
+ }
+ return total;
+ }
+ return -1;
+
+ default:
return -1;
}
+ /* Note: a zero OFFSET and LEN can be used to query the minimum
+ buffer size. */
+ if (offset == 0 && len == 0)
+ return (rs->remote_packet_size);
+ /* Minimum outbuf size is (rs->remote_packet_size) - if bufsiz is
+ not large enough let the caller. */
+ if (len < (rs->remote_packet_size))
+ return -1;
+ len = rs->remote_packet_size;
+
/* except for querying the minimum buffer size, target must be open */
- if (! remote_desc)
+ if (!remote_desc)
error ("remote query is only available after target open");
- /* we only take uppercase letters as query types, at least for now */
- if ( (query_type < 'A') || (query_type > 'Z') )
- error ("invalid remote query type");
-
- if (! buf)
- error ("null remote query specified");
-
- if (! outbuf)
- error ("remote query requires a buffer to receive data");
-
- outbuf[0] = '\0';
+ gdb_assert (annex != NULL);
+ gdb_assert (readbuf != NULL);
*p2++ = 'q';
*p2++ = query_type;
plus one extra in case we are debugging (remote_debug),
we have PBUFZIZ - 7 left to pack the query string */
i = 0;
- while ( buf[i] && (i < (PBUFSIZ - 8)) )
+ while (annex[i] && (i < ((rs->remote_packet_size) - 8)))
{
- /* bad caller may have sent forbidden characters */
- if ( (!isprint(buf[i])) || (buf[i] == '$') || (buf[i] == '#') )
- error ("illegal characters in query string");
-
- *p2++ = buf[i];
+ /* Bad caller may have sent forbidden characters. */
+ gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
+ *p2++ = annex[i];
i++;
}
- *p2 = buf[i];
-
- if ( buf[i] )
- error ("query larger than available buffer");
+ *p2 = '\0';
+ gdb_assert (annex[i] == '\0');
i = putpkt (buf2);
- if ( i < 0 ) return i;
+ if (i < 0)
+ return i;
- getpkt (outbuf, 0);
+ getpkt (readbuf, len, 0);
- return 0;
+ return strlen (readbuf);
+}
+
+static void
+remote_rcmd (char *command,
+ struct ui_file *outbuf)
+{
+ struct remote_state *rs = get_remote_state ();
+ int i;
+ char *buf = alloca (rs->remote_packet_size);
+ char *p = buf;
+
+ if (!remote_desc)
+ error ("remote rcmd is only available after target open");
+
+ /* Send a NULL command across as an empty command */
+ if (command == NULL)
+ command = "";
+
+ /* The query prefix */
+ strcpy (buf, "qRcmd,");
+ p = strchr (buf, '\0');
+
+ if ((strlen (buf) + strlen (command) * 2 + 8/*misc*/) > (rs->remote_packet_size))
+ error ("\"monitor\" command ``%s'' is too long\n", command);
+
+ /* Encode the actual command */
+ bin2hex (command, p, 0);
+
+ if (putpkt (buf) < 0)
+ error ("Communication problem with target\n");
+
+ /* get/display the response */
+ while (1)
+ {
+ /* XXX - see also tracepoint.c:remote_get_noisy_reply() */
+ buf[0] = '\0';
+ getpkt (buf, (rs->remote_packet_size), 0);
+ if (buf[0] == '\0')
+ error ("Target does not support this command\n");
+ if (buf[0] == 'O' && buf[1] != 'K')
+ {
+ remote_console_output (buf + 1); /* 'O' message from stub */
+ continue;
+ }
+ if (strcmp (buf, "OK") == 0)
+ break;
+ if (strlen (buf) == 3 && buf[0] == 'E'
+ && isdigit (buf[1]) && isdigit (buf[2]))
+ {
+ error ("Protocol error with Rcmd");
+ }
+ for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
+ {
+ char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
+ fputc_unfiltered (c, outbuf);
+ }
+ break;
+ }
}
static void
-packet_command (args, from_tty)
- char *args;
- int from_tty;
+packet_command (char *args, int from_tty)
{
- char *buf = alloca (PBUFSIZ);
+ struct remote_state *rs = get_remote_state ();
+ char *buf = alloca (rs->remote_packet_size);
- if (! remote_desc)
+ if (!remote_desc)
error ("command can only be used with remote target");
- if (! args)
+ if (!args)
error ("remote-packet command requires packet text as argument");
puts_filtered ("sending: ");
puts_filtered ("\n");
putpkt (args);
- getpkt (buf, 0);
+ getpkt (buf, (rs->remote_packet_size), 0);
puts_filtered ("received: ");
print_packet (buf);
puts_filtered ("\n");
#if 0
/* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */
-static void display_thread_info PARAMS ((struct gdb_ext_thread_info *info));
+static void display_thread_info (struct gdb_ext_thread_info *info);
-static void threadset_test_cmd PARAMS ((char *cmd, int tty));
+static void threadset_test_cmd (char *cmd, int tty);
-static void threadalive_test PARAMS ((char *cmd, int tty));
+static void threadalive_test (char *cmd, int tty);
-static void threadlist_test_cmd PARAMS ((char *cmd, int tty));
+static void threadlist_test_cmd (char *cmd, int tty);
-int get_and_display_threadinfo PARAMS ((threadref *ref));
+int get_and_display_threadinfo (threadref * ref);
-static void threadinfo_test_cmd PARAMS ((char *cmd, int tty));
+static void threadinfo_test_cmd (char *cmd, int tty);
-static int thread_display_step PARAMS ((threadref *ref, void *context));
+static int thread_display_step (threadref * ref, void *context);
-static void threadlist_update_test_cmd PARAMS ((char *cmd, int tty));
+static void threadlist_update_test_cmd (char *cmd, int tty);
-static void init_remote_threadtests PARAMS ((void));
+static void init_remote_threadtests (void);
-#define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */
+#define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */
static void
-threadset_test_cmd (cmd, tty)
- char *cmd;
- int tty;
+threadset_test_cmd (char *cmd, int tty)
{
int sample_thread = SAMPLE_THREAD;
static void
-threadalive_test (cmd, tty)
- char *cmd;
- int tty;
+threadalive_test (char *cmd, int tty)
{
int sample_thread = SAMPLE_THREAD;
- if (remote_thread_alive (sample_thread))
+ if (remote_thread_alive (pid_to_ptid (sample_thread)))
printf_filtered ("PASS: Thread alive test\n");
else
printf_filtered ("FAIL: Thread alive test\n");
}
-void output_threadid PARAMS ((char *title, threadref * ref));
+void output_threadid (char *title, threadref * ref);
void
-output_threadid (title, ref)
- char *title;
- threadref *ref;
+output_threadid (char *title, threadref *ref)
{
char hexid[20];
}
static void
-threadlist_test_cmd (cmd, tty)
- char *cmd;
- int tty;
+threadlist_test_cmd (char *cmd, int tty)
{
int startflag = 1;
threadref nextthread;
}
void
-display_thread_info (info)
- struct gdb_ext_thread_info *info;
+display_thread_info (struct gdb_ext_thread_info *info)
{
output_threadid ("Threadid: ", &info->threadid);
printf_filtered ("Name: %s\n ", info->shortname);
}
int
-get_and_display_threadinfo (ref)
- threadref *ref;
+get_and_display_threadinfo (threadref *ref)
{
int result;
int set;
}
static void
-threadinfo_test_cmd (cmd, tty)
- char *cmd;
- int tty;
+threadinfo_test_cmd (char *cmd, int tty)
{
int athread = SAMPLE_THREAD;
threadref thread;
}
static int
-thread_display_step (ref, context)
- threadref *ref;
- void *context;
+thread_display_step (threadref *ref, void *context)
{
/* output_threadid(" threadstep ",ref); *//* simple test */
return get_and_display_threadinfo (ref);
}
static void
-threadlist_update_test_cmd (cmd, tty)
- char *cmd;
- int tty;
+threadlist_update_test_cmd (char *cmd, int tty)
{
printf_filtered ("Remote Threadlist update test\n");
remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
#endif /* 0 */
+/* Convert a thread ID to a string. Returns the string in a static
+ buffer. */
+
+static char *
+remote_pid_to_str (ptid_t ptid)
+{
+ static char buf[30];
+
+ sprintf (buf, "Thread %d", PIDGET (ptid));
+ return buf;
+}
+
static void
-init_remote_ops ()
+init_remote_ops (void)
{
- remote_ops.to_shortname = "remote";
+ remote_ops.to_shortname = "remote";
remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
- remote_ops.to_doc =
+ remote_ops.to_doc =
"Use a remote computer via a serial line, using a gdb-specific protocol.\n\
-Specify the serial device it is connected to (e.g. /dev/ttya).";
- remote_ops.to_open = remote_open;
- remote_ops.to_close = remote_close;
+Specify the serial device it is connected to\n\
+(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
+ remote_ops.to_open = remote_open;
+ remote_ops.to_close = remote_close;
remote_ops.to_detach = remote_detach;
- remote_ops.to_resume = remote_resume;
+ remote_ops.to_disconnect = remote_disconnect;
+ remote_ops.to_resume = remote_resume;
remote_ops.to_wait = remote_wait;
remote_ops.to_fetch_registers = remote_fetch_registers;
remote_ops.to_store_registers = remote_store_registers;
remote_ops.to_prepare_to_store = remote_prepare_to_store;
- remote_ops.to_xfer_memory = remote_xfer_memory;
- remote_ops.to_files_info = remote_files_info;
+ remote_ops.to_xfer_memory = remote_xfer_memory;
+ remote_ops.to_files_info = remote_files_info;
remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
- remote_ops.to_kill = remote_kill;
- remote_ops.to_load = generic_load;
+ remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
+ remote_ops.to_stopped_data_address = remote_stopped_data_address;
+ remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
+ remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
+ remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
+ remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
+ remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
+ remote_ops.to_kill = remote_kill;
+ remote_ops.to_load = generic_load;
remote_ops.to_mourn_inferior = remote_mourn;
remote_ops.to_thread_alive = remote_thread_alive;
remote_ops.to_find_new_threads = remote_threads_info;
+ remote_ops.to_pid_to_str = remote_pid_to_str;
+ remote_ops.to_extra_thread_info = remote_threads_extra_info;
remote_ops.to_stop = remote_stop;
- remote_ops.to_query = remote_query;
+ remote_ops.to_xfer_partial = remote_xfer_partial;
+ remote_ops.to_rcmd = remote_rcmd;
remote_ops.to_stratum = process_stratum;
- remote_ops.to_has_all_memory = 1;
- remote_ops.to_has_memory = 1;
- remote_ops.to_has_stack = 1;
- remote_ops.to_has_registers = 1;
- remote_ops.to_has_execution = 1;
- remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
- remote_ops.to_magic = OPS_MAGIC;
+ remote_ops.to_has_all_memory = 1;
+ remote_ops.to_has_memory = 1;
+ remote_ops.to_has_stack = 1;
+ remote_ops.to_has_registers = 1;
+ remote_ops.to_has_execution = 1;
+ remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
+ remote_ops.to_magic = OPS_MAGIC;
}
/* Set up the extended remote vector by making a copy of the standard
remote vector and adding to it. */
static void
-init_extended_remote_ops ()
+init_extended_remote_ops (void)
{
extended_remote_ops = remote_ops;
extended_remote_ops.to_shortname = "extended-remote";
- extended_remote_ops.to_longname =
+ extended_remote_ops.to_longname =
"Extended remote serial target in gdb-specific protocol";
- extended_remote_ops.to_doc =
+ extended_remote_ops.to_doc =
"Use a remote computer via a serial line, using a gdb-specific protocol.\n\
Specify the serial device it is connected to (e.g. /dev/ttya).",
- extended_remote_ops.to_open = extended_remote_open;
+ extended_remote_ops.to_open = extended_remote_open;
extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
}
-/*
- * Command: info remote-process
- *
- * This implements Cisco's version of the "info proc" command.
- *
- * This query allows the target stub to return an arbitrary string
- * (or strings) giving arbitrary information about the target process.
- * This is optional; the target stub isn't required to implement it.
- *
- * Syntax: qfProcessInfo request first string
- * qsProcessInfo request subsequent string
- * reply: 'O'<hex-encoded-string>
- * 'l' last reply (empty)
- */
-
-static void
-remote_info_process (args, from_tty)
- char *args;
- int from_tty;
+static int
+remote_can_async_p (void)
{
- char *buf = alloca (PBUFSIZ);
+ /* We're async whenever the serial device is. */
+ return (current_target.to_async_mask_value) && serial_can_async_p (remote_desc);
+}
- if (remote_desc == 0)
- error ("Command can only be used when connected to the remote target.");
+static int
+remote_is_async_p (void)
+{
+ /* We're async whenever the serial device is. */
+ return (current_target.to_async_mask_value) && serial_is_async_p (remote_desc);
+}
- putpkt ("qfProcessInfo");
- getpkt (buf, 0);
- if (buf[0] == 0)
- return; /* Silently: target does not support this feature. */
+/* Pass the SERIAL event on and up to the client. One day this code
+ will be able to delay notifying the client of an event until the
+ point where an entire packet has been received. */
- if (buf[0] == 'E')
- error ("info proc: target error.");
+static void (*async_client_callback) (enum inferior_event_type event_type, void *context);
+static void *async_client_context;
+static serial_event_ftype remote_async_serial_handler;
- while (buf[0] == 'O') /* Capitol-O packet */
- {
- remote_console_output (&buf[1]);
- putpkt ("qsProcessInfo");
- getpkt (buf, 0);
- }
+static void
+remote_async_serial_handler (struct serial *scb, void *context)
+{
+ /* Don't propogate error information up to the client. Instead let
+ the client find out about the error by querying the target. */
+ async_client_callback (INF_REG_EVENT, async_client_context);
}
-/*
- * Target Cisco
- */
-
static void
-remote_cisco_open (name, from_tty)
- char *name;
- int from_tty;
+remote_async (void (*callback) (enum inferior_event_type event_type, void *context), void *context)
{
- if (name == 0)
- error (
-"To open a remote debug connection, you need to specify what \n\
-device is attached to the remote system (e.g. host:port).");
-
- target_preopen (from_tty);
+ if (current_target.to_async_mask_value == 0)
+ internal_error (__FILE__, __LINE__,
+ "Calling remote_async when async is masked");
- unpush_target (&remote_cisco_ops);
-
- remote_dcache = dcache_init (remote_read_bytes, remote_write_bytes);
-
- remote_desc = SERIAL_OPEN (name);
- if (!remote_desc)
- perror_with_name (name);
-
- /*
- * If a baud rate was specified on the gdb command line it will
- * be greater than the initial value of -1. If it is, use it otherwise
- * default to 9600
- */
-
- baud_rate = (baud_rate > 0) ? baud_rate : 9600;
- if (SERIAL_SETBAUDRATE (remote_desc, baud_rate))
- {
- SERIAL_CLOSE (remote_desc);
- perror_with_name (name);
- }
-
- SERIAL_RAW (remote_desc);
-
- /* If there is something sitting in the buffer we might take it as a
- response to a command, which would be bad. */
- SERIAL_FLUSH_INPUT (remote_desc);
-
- if (from_tty)
+ if (callback != NULL)
{
- puts_filtered ("Remote debugging using ");
- puts_filtered (name);
- puts_filtered ("\n");
+ serial_async (remote_desc, remote_async_serial_handler, NULL);
+ async_client_callback = callback;
+ async_client_context = context;
}
+ else
+ serial_async (remote_desc, NULL, NULL);
+}
- remote_cisco_mode = 1;
-
- push_target (&remote_cisco_ops); /* Switch to using cisco target now */
-
- /* Start out by trying the 'P' request to set registers. We set this each
- time that we open a new target so that if the user switches from one
- stub to another, we can (if the target is closed and reopened) cope. */
- stub_supports_P = 1;
-
- general_thread = -2;
- continue_thread = -2;
-
- /* Force remote_write_bytes to check whether target supports
- binary downloading. */
- remote_binary_checked = 0;
-
- /* Without this, some commands which require an active target (such
- as kill) won't work. This variable serves (at least) double duty
- as both the pid of the target process (if it has such), and as a
- flag indicating that a target is active. These functions should
- be split out into seperate variables, especially since GDB will
- someday have a notion of debugging several processes. */
- inferior_pid = MAGIC_NULL_PID;
-
- /* Start the remote connection; if error (0), discard this target. */
+/* Target async and target extended-async.
- if (!catch_errors (remote_start_remote_dummy, (char *) 0,
- "Couldn't establish connection to remote target\n",
- RETURN_MASK_ALL))
- {
- pop_target ();
- return;
- }
-}
+ This are temporary targets, until it is all tested. Eventually
+ async support will be incorporated int the usual 'remote'
+ target. */
static void
-remote_cisco_close (quitting)
- int quitting;
-{
- remote_cisco_mode = 0;
- remote_close (quitting);
-}
-
-static void
-remote_cisco_mourn PARAMS ((void))
+init_remote_async_ops (void)
{
- remote_mourn_1 (&remote_cisco_ops);
+ remote_async_ops.to_shortname = "async";
+ remote_async_ops.to_longname = "Remote serial target in async version of the gdb-specific protocol";
+ remote_async_ops.to_doc =
+ "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
+Specify the serial device it is connected to (e.g. /dev/ttya).";
+ remote_async_ops.to_open = remote_async_open;
+ remote_async_ops.to_close = remote_close;
+ remote_async_ops.to_detach = remote_detach;
+ remote_async_ops.to_disconnect = remote_disconnect;
+ remote_async_ops.to_resume = remote_async_resume;
+ remote_async_ops.to_wait = remote_async_wait;
+ remote_async_ops.to_fetch_registers = remote_fetch_registers;
+ remote_async_ops.to_store_registers = remote_store_registers;
+ remote_async_ops.to_prepare_to_store = remote_prepare_to_store;
+ remote_async_ops.to_xfer_memory = remote_xfer_memory;
+ remote_async_ops.to_files_info = remote_files_info;
+ remote_async_ops.to_insert_breakpoint = remote_insert_breakpoint;
+ remote_async_ops.to_remove_breakpoint = remote_remove_breakpoint;
+ remote_async_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
+ remote_async_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
+ remote_async_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
+ remote_async_ops.to_insert_watchpoint = remote_insert_watchpoint;
+ remote_async_ops.to_remove_watchpoint = remote_remove_watchpoint;
+ remote_async_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
+ remote_async_ops.to_stopped_data_address = remote_stopped_data_address;
+ remote_async_ops.to_terminal_inferior = remote_async_terminal_inferior;
+ remote_async_ops.to_terminal_ours = remote_async_terminal_ours;
+ remote_async_ops.to_kill = remote_async_kill;
+ remote_async_ops.to_load = generic_load;
+ remote_async_ops.to_mourn_inferior = remote_async_mourn;
+ remote_async_ops.to_thread_alive = remote_thread_alive;
+ remote_async_ops.to_find_new_threads = remote_threads_info;
+ remote_async_ops.to_pid_to_str = remote_pid_to_str;
+ remote_async_ops.to_extra_thread_info = remote_threads_extra_info;
+ remote_async_ops.to_stop = remote_stop;
+ remote_async_ops.to_xfer_partial = remote_xfer_partial;
+ remote_async_ops.to_rcmd = remote_rcmd;
+ remote_async_ops.to_stratum = process_stratum;
+ remote_async_ops.to_has_all_memory = 1;
+ remote_async_ops.to_has_memory = 1;
+ remote_async_ops.to_has_stack = 1;
+ remote_async_ops.to_has_registers = 1;
+ remote_async_ops.to_has_execution = 1;
+ remote_async_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
+ remote_async_ops.to_can_async_p = remote_can_async_p;
+ remote_async_ops.to_is_async_p = remote_is_async_p;
+ remote_async_ops.to_async = remote_async;
+ remote_async_ops.to_async_mask_value = 1;
+ remote_async_ops.to_magic = OPS_MAGIC;
}
-enum {
- READ_MORE,
- FATAL_ERROR,
- ENTER_DEBUG,
- DISCONNECT_TELNET
-} minitelnet_return;
-
-/* shared between readsocket() and readtty() */
-static char *tty_input;
-
-static int escape_count;
-static int echo_check;
-extern int quit_flag;
+/* Set up the async extended remote vector by making a copy of the standard
+ remote vector and adding to it. */
-static int
-readsocket ()
+static void
+init_extended_async_remote_ops (void)
{
- int data;
-
- /* Loop until the socket doesn't have any more data */
-
- while ((data = readchar (0)) >= 0)
- {
- /* Check for the escape sequence */
- if (data == '|')
- {
- /* If this is the fourth escape, get out */
- if (++escape_count == 4)
- {
- return ENTER_DEBUG;
- }
- else
- { /* This is a '|', but not the fourth in a row.
- Continue without echoing it. If it isn't actually
- one of four in a row, it'll be echoed later. */
- continue;
- }
- }
- else /* Not a '|' */
- {
- /* Ensure any pending '|'s are flushed. */
-
- for ( ; escape_count > 0; escape_count--)
- putchar('|');
- }
-
- if (data == '\r') /* If this is a return character, */
- continue; /* - just supress it. */
-
- if (echo_check != -1) /* Check for echo of user input. */
- {
- if (tty_input[echo_check] == data)
- {
- echo_check++; /* Character matched user input: */
- continue; /* Continue without echoing it. */
- }
- else if ((data == '\n') && (tty_input[echo_check] == '\r'))
- { /* End of the line (and of echo checking). */
- echo_check = -1; /* No more echo supression */
- continue; /* Continue without echoing. */
- }
- else
- { /* Failed check for echo of user input.
- We now have some suppressed output to flush! */
- int j;
-
- for (j = 0; j < echo_check; j++)
- putchar (tty_input[j]);
- echo_check = -1;
- }
- }
- putchar (data); /* Default case: output the char. */
- }
+ extended_async_remote_ops = remote_async_ops;
- if (data == SERIAL_TIMEOUT) /* Timeout returned from readchar. */
- return READ_MORE; /* Try to read some more */
- else
- return FATAL_ERROR; /* Trouble, bail out */
+ extended_async_remote_ops.to_shortname = "extended-async";
+ extended_async_remote_ops.to_longname =
+ "Extended remote serial target in async gdb-specific protocol";
+ extended_async_remote_ops.to_doc =
+ "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
+Specify the serial device it is connected to (e.g. /dev/ttya).",
+ extended_async_remote_ops.to_open = extended_remote_async_open;
+ extended_async_remote_ops.to_create_inferior = extended_remote_async_create_inferior;
+ extended_async_remote_ops.to_mourn_inferior = extended_remote_mourn;
}
-static int
-readtty ()
+static void
+set_remote_cmd (char *args, int from_tty)
{
- int status;
- int tty_bytecount;
-
- /* First, read a buffer full from the terminal */
- tty_bytecount = read (fileno (stdin), tty_input, sizeof (tty_input) - 1);
- if (tty_bytecount == -1)
- {
- perror ("readtty: read failed");
- return FATAL_ERROR;
- }
-
- /* Remove a quoted newline. */
- if (tty_input[tty_bytecount - 1] == '\n' &&
- tty_input[tty_bytecount - 2] == '\\') /* line ending in backslash */
- {
- tty_input[--tty_bytecount] = 0; /* remove newline */
- tty_input[--tty_bytecount] = 0; /* remove backslash */
- }
-
- /* Turn trailing newlines into returns */
- if (tty_input[tty_bytecount - 1] == '\n')
- tty_input[tty_bytecount - 1] = '\r';
-
- /* If the line consists of a ~, enter debugging mode. */
- if ((tty_input[0] == '~') && (tty_bytecount == 2))
- return ENTER_DEBUG;
-
- /* Make this a zero terminated string and write it out */
- tty_input[tty_bytecount] = 0;
- if (SERIAL_WRITE (remote_desc, tty_input, tty_bytecount))
- {
- perror_with_name ("readtty: write failed");
- return FATAL_ERROR;
- }
-
- return READ_MORE;
}
-static int
-minitelnet ()
+static void
+show_remote_cmd (char *args, int from_tty)
{
- fd_set input; /* file descriptors for select */
- int tablesize; /* max number of FDs for select */
- int status;
- int quit_count = 0;
-
- extern int escape_count; /* global shared by readsocket */
- extern int echo_check; /* ditto */
-
- escape_count = 0;
- echo_check = -1;
-
- tablesize = 8 * sizeof (input);
-
- for (;;)
- {
- /* Check for anything from our socket - doesn't block. Note that
- this must be done *before* the select as there may be
- buffered I/O waiting to be processed. */
-
- if ((status = readsocket ()) == FATAL_ERROR)
- {
- error ("Debugging terminated by communications error");
- }
- else if (status != READ_MORE)
- {
- return (status);
- }
-
- fflush(stdout); /* Flush output before blocking */
-
- /* Now block on more socket input or TTY input */
-
- FD_ZERO (&input);
- FD_SET (fileno(stdin), &input);
- FD_SET (remote_desc->fd, &input);
-
- status = select (tablesize, &input, 0, 0, 0);
- if ((status == -1) && (errno != EINTR))
- {
- error ("Communications error on select %d", errno);
- }
-
- /* Handle Control-C typed */
-
- if (quit_flag)
- {
- if ((++quit_count) == 2)
- {
- if (query ("Interrupt GDB? "))
- {
- printf_filtered ("Interrupted by user.\n");
- return_to_top_level (RETURN_QUIT);
- }
- quit_count = 0;
- }
- quit_flag = 0;
-
- if (remote_break)
- SERIAL_SEND_BREAK (remote_desc);
- else
- SERIAL_WRITE (remote_desc, "\003", 1);
-
- continue;
- }
-
- /* Handle console input */
-
- if (FD_ISSET (fileno (stdin), &input))
- {
- quit_count = 0;
- echo_check = 0;
- status = readtty ();
- if (status == READ_MORE)
- continue;
-
- return status; /* telnet session ended */
- }
- }
+ /* FIXME: cagney/2002-06-15: This function should iterate over
+ remote_show_cmdlist for a list of sub commands to show. */
+ show_remote_protocol_Z_packet_cmd (args, from_tty, NULL);
+ show_remote_protocol_e_packet_cmd (args, from_tty, NULL);
+ show_remote_protocol_E_packet_cmd (args, from_tty, NULL);
+ show_remote_protocol_P_packet_cmd (args, from_tty, NULL);
+ show_remote_protocol_qSymbol_packet_cmd (args, from_tty, NULL);
+ show_remote_protocol_vcont_packet_cmd (args, from_tty, NULL);
+ show_remote_protocol_binary_download_cmd (args, from_tty, NULL);
+ show_remote_protocol_qPart_auxv_packet_cmd (args, from_tty, NULL);
}
-static int
-remote_cisco_wait (pid, status)
- int pid;
- struct target_waitstatus *status;
+static void
+build_remote_gdbarch_data (void)
{
- if (minitelnet() != ENTER_DEBUG)
- {
- error ("Debugging session terminated by protocol error");
- }
- putpkt ("?");
- return remote_wait (pid, status);
+ remote_address_size = TARGET_ADDR_BIT;
}
-static void
-init_remote_cisco_ops ()
-{
- remote_cisco_ops.to_shortname = "cisco";
- remote_cisco_ops.to_longname = "Remote serial target in cisco-specific protocol";
- remote_cisco_ops.to_doc =
- "Use a remote machine via TCP, using a cisco-specific protocol.\n\
-Specify the serial device it is connected to (e.g. host:2020).";
- remote_cisco_ops.to_open = remote_cisco_open;
- remote_cisco_ops.to_close = remote_cisco_close;
- remote_cisco_ops.to_detach = remote_detach;
- remote_cisco_ops.to_resume = remote_resume;
- remote_cisco_ops.to_wait = remote_cisco_wait;
- remote_cisco_ops.to_fetch_registers = remote_fetch_registers;
- remote_cisco_ops.to_store_registers = remote_store_registers;
- remote_cisco_ops.to_prepare_to_store = remote_prepare_to_store;
- remote_cisco_ops.to_xfer_memory = remote_xfer_memory;
- remote_cisco_ops.to_files_info = remote_files_info;
- remote_cisco_ops.to_insert_breakpoint = remote_insert_breakpoint;
- remote_cisco_ops.to_remove_breakpoint = remote_remove_breakpoint;
- remote_cisco_ops.to_kill = remote_kill;
- remote_cisco_ops.to_load = generic_load;
- remote_cisco_ops.to_mourn_inferior = remote_cisco_mourn;
- remote_cisco_ops.to_thread_alive = remote_thread_alive;
- remote_cisco_ops.to_find_new_threads = remote_threads_info;
- remote_cisco_ops.to_stratum = process_stratum;
- remote_cisco_ops.to_has_all_memory = 1;
- remote_cisco_ops.to_has_memory = 1;
- remote_cisco_ops.to_has_stack = 1;
- remote_cisco_ops.to_has_registers = 1;
- remote_cisco_ops.to_has_execution = 1;
- remote_cisco_ops.to_magic = OPS_MAGIC;
-}
+/* Saved pointer to previous owner of the new_objfile event. */
+static void (*remote_new_objfile_chain) (struct objfile *);
+/* Function to be called whenever a new objfile (shlib) is detected. */
static void
-build_remote_gdbarch_data ()
+remote_new_objfile (struct objfile *objfile)
{
- tty_input = xmalloc (PBUFSIZ);
+ if (remote_desc != 0) /* Have a remote connection */
+ {
+ remote_check_symbols (objfile);
+ }
+ /* Call predecessor on chain, if any. */
+ if (remote_new_objfile_chain != 0 &&
+ remote_desc == 0)
+ remote_new_objfile_chain (objfile);
}
-
void
-_initialize_remote ()
+_initialize_remote (void)
{
+ static struct cmd_list_element *remote_set_cmdlist;
+ static struct cmd_list_element *remote_show_cmdlist;
+ struct cmd_list_element *tmpcmd;
+
/* architecture specific data */
- build_remote_gdbarch_data ();
- register_gdbarch_swap (&tty_input, sizeof (&tty_input), NULL);
- register_gdbarch_swap (NULL, 0, build_remote_gdbarch_data);
+ remote_gdbarch_data_handle = register_gdbarch_data (init_remote_state);
- /* runtime constants - we retain the value of remote_write_size
- across architecture swaps. */
- remote_write_size = PBUFSIZ;
+ /* Old tacky stuff. NOTE: This comes after the remote protocol so
+ that the remote protocol has been initialized. */
+ DEPRECATED_REGISTER_GDBARCH_SWAP (remote_address_size);
+ deprecated_register_gdbarch_swap (NULL, 0, build_remote_gdbarch_data);
init_remote_ops ();
add_target (&remote_ops);
init_extended_remote_ops ();
add_target (&extended_remote_ops);
- init_remote_cisco_ops ();
- add_target (&remote_cisco_ops);
+ init_remote_async_ops ();
+ add_target (&remote_async_ops);
+
+ init_extended_async_remote_ops ();
+ add_target (&extended_async_remote_ops);
+
+ /* Hook into new objfile notification. */
+ remote_new_objfile_chain = target_new_objfile_hook;
+ target_new_objfile_hook = remote_new_objfile;
#if 0
init_remote_threadtests ();
#endif
- add_cmd ("compare-sections", class_obscure, compare_sections_command,
+ /* set/show remote ... */
+
+ add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, "\
+Remote protocol specific variables\n\
+Configure various remote-protocol specific variables such as\n\
+the packets being used",
+ &remote_set_cmdlist, "set remote ",
+ 0/*allow-unknown*/, &setlist);
+ add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, "\
+Remote protocol specific variables\n\
+Configure various remote-protocol specific variables such as\n\
+the packets being used",
+ &remote_show_cmdlist, "show remote ",
+ 0/*allow-unknown*/, &showlist);
+
+ add_cmd ("compare-sections", class_obscure, compare_sections_command,
"Compare section data on target to the exec file.\n\
-Argument is a single section name (default: all loaded sections).",
+Argument is a single section name (default: all loaded sections).",
&cmdlist);
add_cmd ("packet", class_maintenance, packet_command,
terminating `#' character and checksum.",
&maintenancelist);
- add_show_from_set
- (add_set_cmd ("remotetimeout", no_class,
- var_integer, (char *)&remote_timeout,
- "Set timeout value for remote read.\n",
- &setlist),
- &showlist);
-
- add_show_from_set
- (add_set_cmd ("remotebreak", no_class,
- var_integer, (char *)&remote_break,
- "Set whether to send break if interrupted.\n",
- &setlist),
- &showlist);
-
- add_show_from_set
- (add_set_cmd ("remotewritesize", no_class,
- var_integer, (char *)&remote_write_size,
- "Set the maximum number of bytes per memory write packet.\n",
- &setlist),
- &showlist);
-
- remote_address_size = TARGET_PTR_BIT;
- add_show_from_set
+ add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break,
+ "Set whether to send break if interrupted.\n",
+ "Show whether to send break if interrupted.\n",
+ NULL, NULL,
+ &setlist, &showlist);
+
+ /* Install commands for configuring memory read/write packets. */
+
+ add_cmd ("remotewritesize", no_class, set_memory_write_packet_size,
+ "Set the maximum number of bytes per memory write packet (deprecated).\n",
+ &setlist);
+ add_cmd ("remotewritesize", no_class, show_memory_write_packet_size,
+ "Show the maximum number of bytes per memory write packet (deprecated).\n",
+ &showlist);
+ add_cmd ("memory-write-packet-size", no_class,
+ set_memory_write_packet_size,
+ "Set the maximum number of bytes per memory-write packet.\n"
+ "Specify the number of bytes in a packet or 0 (zero) for the\n"
+ "default packet size. The actual limit is further reduced\n"
+ "dependent on the target. Specify ``fixed'' to disable the\n"
+ "further restriction and ``limit'' to enable that restriction\n",
+ &remote_set_cmdlist);
+ add_cmd ("memory-read-packet-size", no_class,
+ set_memory_read_packet_size,
+ "Set the maximum number of bytes per memory-read packet.\n"
+ "Specify the number of bytes in a packet or 0 (zero) for the\n"
+ "default packet size. The actual limit is further reduced\n"
+ "dependent on the target. Specify ``fixed'' to disable the\n"
+ "further restriction and ``limit'' to enable that restriction\n",
+ &remote_set_cmdlist);
+ add_cmd ("memory-write-packet-size", no_class,
+ show_memory_write_packet_size,
+ "Show the maximum number of bytes per memory-write packet.\n",
+ &remote_show_cmdlist);
+ add_cmd ("memory-read-packet-size", no_class,
+ show_memory_read_packet_size,
+ "Show the maximum number of bytes per memory-read packet.\n",
+ &remote_show_cmdlist);
+
+ add_setshow_cmd ("hardware-watchpoint-limit", no_class,
+ var_zinteger, &remote_hw_watchpoint_limit, "\
+Set the maximum number of target hardware watchpoints.\n\
+Specify a negative limit for unlimited.", "\
+Show the maximum number of target hardware watchpoints.\n",
+ NULL, NULL, &remote_set_cmdlist, &remote_show_cmdlist);
+ add_setshow_cmd ("hardware-breakpoint-limit", no_class,
+ var_zinteger, &remote_hw_breakpoint_limit, "\
+Set the maximum number of target hardware breakpoints.\n\
+Specify a negative limit for unlimited.", "\
+Show the maximum number of target hardware breakpoints.\n",
+ NULL, NULL, &remote_set_cmdlist, &remote_show_cmdlist);
+
+ add_show_from_set
(add_set_cmd ("remoteaddresssize", class_obscure,
- var_integer, (char *)&remote_address_size,
+ var_integer, (char *) &remote_address_size,
"Set the maximum size of the address (in bits) \
in a memory packet.\n",
&setlist),
- &showlist);
+ &showlist);
- add_show_from_set
+ add_packet_config_cmd (&remote_protocol_binary_download,
+ "X", "binary-download",
+ set_remote_protocol_binary_download_cmd,
+ show_remote_protocol_binary_download_cmd,
+ &remote_set_cmdlist, &remote_show_cmdlist,
+ 1);
+#if 0
+ /* XXXX - should ``set remotebinarydownload'' be retained for
+ compatibility. */
+ add_show_from_set
(add_set_cmd ("remotebinarydownload", no_class,
var_boolean, (char *) &remote_binary_download,
"Set binary downloads.\n", &setlist),
&showlist);
+#endif
- add_info ("remote-process", remote_info_process,
- "Query the remote system for process info.");
-
+ add_packet_config_cmd (&remote_protocol_vcont,
+ "vCont", "verbose-resume",
+ set_remote_protocol_vcont_packet_cmd,
+ show_remote_protocol_vcont_packet_cmd,
+ &remote_set_cmdlist, &remote_show_cmdlist,
+ 0);
+
+ add_packet_config_cmd (&remote_protocol_qSymbol,
+ "qSymbol", "symbol-lookup",
+ set_remote_protocol_qSymbol_packet_cmd,
+ show_remote_protocol_qSymbol_packet_cmd,
+ &remote_set_cmdlist, &remote_show_cmdlist,
+ 0);
+
+ add_packet_config_cmd (&remote_protocol_e,
+ "e", "step-over-range",
+ set_remote_protocol_e_packet_cmd,
+ show_remote_protocol_e_packet_cmd,
+ &remote_set_cmdlist, &remote_show_cmdlist,
+ 0);
+ /* Disable by default. The ``e'' packet has nasty interactions with
+ the threading code - it relies on global state. */
+ remote_protocol_e.detect = AUTO_BOOLEAN_FALSE;
+ update_packet_config (&remote_protocol_e);
+
+ add_packet_config_cmd (&remote_protocol_E,
+ "E", "step-over-range-w-signal",
+ set_remote_protocol_E_packet_cmd,
+ show_remote_protocol_E_packet_cmd,
+ &remote_set_cmdlist, &remote_show_cmdlist,
+ 0);
+ /* Disable by default. The ``e'' packet has nasty interactions with
+ the threading code - it relies on global state. */
+ remote_protocol_E.detect = AUTO_BOOLEAN_FALSE;
+ update_packet_config (&remote_protocol_E);
+
+ add_packet_config_cmd (&remote_protocol_P,
+ "P", "set-register",
+ set_remote_protocol_P_packet_cmd,
+ show_remote_protocol_P_packet_cmd,
+ &remote_set_cmdlist, &remote_show_cmdlist,
+ 1);
+
+ add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP],
+ "Z0", "software-breakpoint",
+ set_remote_protocol_Z_software_bp_packet_cmd,
+ show_remote_protocol_Z_software_bp_packet_cmd,
+ &remote_set_cmdlist, &remote_show_cmdlist,
+ 0);
+
+ add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP],
+ "Z1", "hardware-breakpoint",
+ set_remote_protocol_Z_hardware_bp_packet_cmd,
+ show_remote_protocol_Z_hardware_bp_packet_cmd,
+ &remote_set_cmdlist, &remote_show_cmdlist,
+ 0);
+
+ add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP],
+ "Z2", "write-watchpoint",
+ set_remote_protocol_Z_write_wp_packet_cmd,
+ show_remote_protocol_Z_write_wp_packet_cmd,
+ &remote_set_cmdlist, &remote_show_cmdlist,
+ 0);
+
+ add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP],
+ "Z3", "read-watchpoint",
+ set_remote_protocol_Z_read_wp_packet_cmd,
+ show_remote_protocol_Z_read_wp_packet_cmd,
+ &remote_set_cmdlist, &remote_show_cmdlist,
+ 0);
+
+ add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP],
+ "Z4", "access-watchpoint",
+ set_remote_protocol_Z_access_wp_packet_cmd,
+ show_remote_protocol_Z_access_wp_packet_cmd,
+ &remote_set_cmdlist, &remote_show_cmdlist,
+ 0);
+
+ add_packet_config_cmd (&remote_protocol_qPart_auxv,
+ "qPart_auxv", "read-aux-vector",
+ set_remote_protocol_qPart_auxv_packet_cmd,
+ show_remote_protocol_qPart_auxv_packet_cmd,
+ &remote_set_cmdlist, &remote_show_cmdlist,
+ 0);
+
+ /* Keep the old ``set remote Z-packet ...'' working. */
+ add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
+ &remote_Z_packet_detect, "\
+Set use of remote protocol `Z' packets",
+ "Show use of remote protocol `Z' packets ",
+ set_remote_protocol_Z_packet_cmd,
+ show_remote_protocol_Z_packet_cmd,
+ &remote_set_cmdlist, &remote_show_cmdlist);
+
+ /* Eventually initialize fileio. See fileio.c */
+ initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
}
projects / deliverable / binutils-gdb.git / blobdiff