Implement qXfer:exec-file:read in gdbserver
This commit implements the "qXfer:exec-file:read" packet in gdbserver. gdb/gdbserver/ChangeLog: * target.h (struct target_ops) <pid_to_exec_file>: New field. * linux-low.c (linux_target_ops): Initialize pid_to_exec_file. * server.c (handle_qxfer_exec_file): New function. (qxfer_packets): Add exec-file entry. (handle_query): Report qXfer:exec-file:read as supported packet.
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@ -1,3 +1,11 @@
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2015-04-17 Gary Benson <gbenson@redhat.com>
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* target.h (struct target_ops) <pid_to_exec_file>: New field.
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* linux-low.c (linux_target_ops): Initialize pid_to_exec_file.
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* server.c (handle_qxfer_exec_file): New function.
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(qxfer_packets): Add exec-file entry.
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(handle_query): Report qXfer:exec-file:read as supported packet.
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2015-04-14 Romain Naour <romain.naour@openwide.fr> (tiny change)
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* linux-low.c (linux_read_offsets): Remove get_thread_lwp.
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@ -6433,6 +6433,7 @@ static struct target_ops linux_target_ops = {
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NULL,
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#endif
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linux_supports_range_stepping,
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linux_proc_pid_to_exec_file,
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};
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static void
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@ -1137,6 +1137,42 @@ handle_qxfer_auxv (const char *annex,
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return (*the_target->read_auxv) (offset, readbuf, len);
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}
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/* Handle qXfer:exec-file:read. */
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static int
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handle_qxfer_exec_file (const char *const_annex,
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gdb_byte *readbuf, const gdb_byte *writebuf,
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ULONGEST offset, LONGEST len)
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{
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char *annex, *file;
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ULONGEST pid;
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int total_len;
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if (the_target->pid_to_exec_file == NULL || writebuf != NULL)
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return -2;
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annex = alloca (strlen (const_annex) + 1);
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strcpy (annex, const_annex);
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annex = unpack_varlen_hex (annex, &pid);
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if (annex[0] != '\0' || pid == 0)
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return -1;
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file = (*the_target->pid_to_exec_file) (pid);
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if (file == NULL)
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return -1;
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total_len = strlen (file);
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if (offset > total_len)
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return -1;
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if (offset + len > total_len)
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len = total_len - offset;
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memcpy (readbuf, file + offset, len);
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return len;
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}
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/* Handle qXfer:features:read. */
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static int
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@ -1638,6 +1674,7 @@ static const struct qxfer qxfer_packets[] =
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{ "auxv", handle_qxfer_auxv },
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{ "btrace", handle_qxfer_btrace },
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{ "btrace-conf", handle_qxfer_btrace_conf },
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{ "exec-file", handle_qxfer_exec_file},
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{ "fdpic", handle_qxfer_fdpic},
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{ "features", handle_qxfer_features },
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{ "libraries", handle_qxfer_libraries },
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@ -2082,6 +2119,9 @@ handle_query (char *own_buf, int packet_len, int *new_packet_len_p)
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if (target_supports_stopped_by_hw_breakpoint ())
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strcat (own_buf, ";hwbreak+");
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if (the_target->pid_to_exec_file != NULL)
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strcat (own_buf, ";qXfer:exec-file:read+");
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return;
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}
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@ -394,6 +394,14 @@ struct target_ops
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/* Return true if target supports range stepping. */
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int (*supports_range_stepping) (void);
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/* Return the full absolute name of the executable file that was
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run to create the process PID. If the executable file cannot
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be determined, NULL is returned. Otherwise, a pointer to a
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character string containing the pathname is returned. This
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string should be copied into a buffer by the client if the string
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will not be immediately used, or if it must persist. */
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char *(*pid_to_exec_file) (int pid);
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};
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extern struct target_ops *the_target;
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