#include "gdbcmd.h"
#include "symtab.h"
#include "inferior.h"
+#include "infrun.h"
#include "bfd.h"
#include "symfile.h"
#include "objfiles.h"
ULONGEST pattern_len,
CORE_ADDR *found_addrp);
+static int default_verify_memory (struct target_ops *self,
+ const gdb_byte *data,
+ CORE_ADDR memaddr, ULONGEST size);
+
static void tcomplain (void) ATTRIBUTE_NORETURN;
static int return_zero (struct target_ops *);
static char *default_pid_to_str (struct target_ops *ops, ptid_t ptid);
-static int find_default_can_async_p (struct target_ops *ignore);
-
-static int find_default_is_async_p (struct target_ops *ignore);
-
static enum exec_direction_kind default_execution_direction
(struct target_ops *self);
if (t->to_has_execution == NULL)
t->to_has_execution = return_zero_has_execution;
+ /* These methods can be called on an unpushed target and so require
+ a default implementation if the target might plausibly be the
+ default run target. */
+ gdb_assert (t->to_can_run == NULL || (t->to_can_async_p != NULL
+ && t->to_supports_non_stop != NULL));
+
install_delegators (t);
}
(*current_target.to_load) (¤t_target, arg, from_tty);
}
-void
-target_create_inferior (char *exec_file, char *args,
- char **env, int from_tty)
-{
- struct target_ops *t;
-
- for (t = current_target.beneath; t != NULL; t = t->beneath)
- {
- if (t->to_create_inferior != NULL)
- {
- t->to_create_inferior (t, exec_file, args, env, from_tty);
- if (targetdebug)
- fprintf_unfiltered (gdb_stdlog,
- "target_create_inferior (%s, %s, xxx, %d)\n",
- exec_file, args, from_tty);
- return;
- }
- }
-
- internal_error (__FILE__, __LINE__,
- _("could not find a target to create inferior"));
-}
-
void
target_terminal_inferior (void)
{
/* Fetch the load module address for this objfile. */
lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (),
objfile);
- /* If it's 0, throw the appropriate exception. */
- if (lm_addr == 0)
- throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR,
- _("TLS load module not found"));
addr = target->to_get_thread_local_address (target, ptid,
lm_addr, offset);
return NULL;
}
-/* Read memory from the live target, even if currently inspecting a
- traceframe. The return is the same as that of target_read. */
-
-static enum target_xfer_status
-target_read_live_memory (enum target_object object,
- ULONGEST memaddr, gdb_byte *myaddr, ULONGEST len,
- ULONGEST *xfered_len)
-{
- enum target_xfer_status ret;
- struct cleanup *cleanup;
-
- /* Switch momentarily out of tfind mode so to access live memory.
- Note that this must not clear global state, such as the frame
- cache, which must still remain valid for the previous traceframe.
- We may be _building_ the frame cache at this point. */
- cleanup = make_cleanup_restore_traceframe_number ();
- set_traceframe_number (-1);
-
- ret = target_xfer_partial (current_target.beneath, object, NULL,
- myaddr, NULL, memaddr, len, xfered_len);
-
- do_cleanups (cleanup);
- return ret;
-}
-
-/* Using the set of read-only target sections of OPS, read live
- read-only memory. Note that the actual reads start from the
- top-most target again.
-
- For interface/parameters/return description see target.h,
- to_xfer_partial. */
-
-static enum target_xfer_status
-memory_xfer_live_readonly_partial (struct target_ops *ops,
- enum target_object object,
- gdb_byte *readbuf, ULONGEST memaddr,
- ULONGEST len, ULONGEST *xfered_len)
-{
- struct target_section *secp;
- struct target_section_table *table;
-
- secp = target_section_by_addr (ops, memaddr);
- if (secp != NULL
- && (bfd_get_section_flags (secp->the_bfd_section->owner,
- secp->the_bfd_section)
- & SEC_READONLY))
- {
- struct target_section *p;
- ULONGEST memend = memaddr + len;
-
- table = target_get_section_table (ops);
-
- for (p = table->sections; p < table->sections_end; p++)
- {
- if (memaddr >= p->addr)
- {
- if (memend <= p->endaddr)
- {
- /* Entire transfer is within this section. */
- return target_read_live_memory (object, memaddr,
- readbuf, len, xfered_len);
- }
- else if (memaddr >= p->endaddr)
- {
- /* This section ends before the transfer starts. */
- continue;
- }
- else
- {
- /* This section overlaps the transfer. Just do half. */
- len = p->endaddr - memaddr;
- return target_read_live_memory (object, memaddr,
- readbuf, len, xfered_len);
- }
- }
- }
- }
-
- return TARGET_XFER_EOF;
-}
-
/* Read memory from more than one valid target. A core file, for
instance, could have some of memory but delegate other bits to
the target below it. So, we must manually try all targets. */
}
}
- /* If reading unavailable memory in the context of traceframes, and
- this address falls within a read-only section, fallback to
- reading from live memory. */
- if (readbuf != NULL && get_traceframe_number () != -1)
- {
- VEC(mem_range_s) *available;
-
- /* If we fail to get the set of available memory, then the
- target does not support querying traceframe info, and so we
- attempt reading from the traceframe anyway (assuming the
- target implements the old QTro packet then). */
- if (traceframe_available_memory (&available, memaddr, len))
- {
- struct cleanup *old_chain;
-
- old_chain = make_cleanup (VEC_cleanup(mem_range_s), &available);
-
- if (VEC_empty (mem_range_s, available)
- || VEC_index (mem_range_s, available, 0)->start != memaddr)
- {
- /* Don't read into the traceframe's available
- memory. */
- if (!VEC_empty (mem_range_s, available))
- {
- LONGEST oldlen = len;
-
- len = VEC_index (mem_range_s, available, 0)->start - memaddr;
- gdb_assert (len <= oldlen);
- }
-
- do_cleanups (old_chain);
-
- /* This goes through the topmost target again. */
- res = memory_xfer_live_readonly_partial (ops, object,
- readbuf, memaddr,
- len, xfered_len);
- if (res == TARGET_XFER_OK)
- return TARGET_XFER_OK;
- else
- {
- /* No use trying further, we know some memory starting
- at MEMADDR isn't available. */
- *xfered_len = len;
- return TARGET_XFER_UNAVAILABLE;
- }
- }
-
- /* Don't try to read more than how much is available, in
- case the target implements the deprecated QTro packet to
- cater for older GDBs (the target's knowledge of read-only
- sections may be outdated by now). */
- len = VEC_index (mem_range_s, available, 0)->length;
-
- do_cleanups (old_chain);
- }
- }
-
/* Try GDB's internal data cache. */
region = lookup_mem_region (memaddr);
/* region->hi == 0 means there's no upper bound. */
gdb_signal_to_name (signal));
registers_changed_ptid (ptid);
+ /* We only set the internal executing state here. The user/frontend
+ running state is set at a higher level. */
set_executing (ptid, 1);
- set_running (ptid, 1);
clear_inline_frame_state (ptid);
}
internal_error (__FILE__, __LINE__, _("No targets found"));
}
+/* Whether GDB is allowed to fall back to the default run target for
+ "run", "attach", etc. when no target is connected yet. */
+static int auto_connect_native_target = 1;
+
+static void
+show_auto_connect_native_target (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file,
+ _("Whether GDB may automatically connect to the "
+ "native target is %s.\n"),
+ value);
+}
+
/* Look through the list of possible targets for a target that can
execute a run or attach command without any other data. This is
used to locate the default process stratum.
static struct target_ops *
find_default_run_target (char *do_mesg)
{
- struct target_ops **t;
struct target_ops *runable = NULL;
- int count;
-
- count = 0;
- for (t = target_structs; t < target_structs + target_struct_size;
- ++t)
+ if (auto_connect_native_target)
{
- if ((*t)->to_can_run != delegate_can_run && target_can_run (*t))
+ struct target_ops **t;
+ int count = 0;
+
+ for (t = target_structs; t < target_structs + target_struct_size;
+ ++t)
{
- runable = *t;
- ++count;
+ if ((*t)->to_can_run != delegate_can_run && target_can_run (*t))
+ {
+ runable = *t;
+ ++count;
+ }
}
+
+ if (count != 1)
+ runable = NULL;
}
- if (count != 1)
+ if (runable == NULL)
{
if (do_mesg)
error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
return runable;
}
-void
-find_default_attach (struct target_ops *ops, char *args, int from_tty)
-{
- struct target_ops *t;
-
- t = find_default_run_target ("attach");
- (t->to_attach) (t, args, from_tty);
- return;
-}
+/* See target.h. */
-void
-find_default_create_inferior (struct target_ops *ops,
- char *exec_file, char *allargs, char **env,
- int from_tty)
+struct target_ops *
+find_attach_target (void)
{
struct target_ops *t;
- t = find_default_run_target ("run");
- (t->to_create_inferior) (t, exec_file, allargs, env, from_tty);
- return;
-}
+ /* If a target on the current stack can attach, use it. */
+ for (t = current_target.beneath; t != NULL; t = t->beneath)
+ {
+ if (t->to_attach != NULL)
+ break;
+ }
-static int
-find_default_can_async_p (struct target_ops *ignore)
-{
- struct target_ops *t;
+ /* Otherwise, use the default run target for attaching. */
+ if (t == NULL)
+ t = find_default_run_target ("attach");
- /* This may be called before the target is pushed on the stack;
- look for the default process stratum. If there's none, gdb isn't
- configured with a native debugger, and target remote isn't
- connected yet. */
- t = find_default_run_target (NULL);
- if (t && t->to_can_async_p != delegate_can_async_p)
- return (t->to_can_async_p) (t);
- return 0;
+ return t;
}
-static int
-find_default_is_async_p (struct target_ops *ignore)
-{
- struct target_ops *t;
-
- /* This may be called before the target is pushed on the stack;
- look for the default process stratum. If there's none, gdb isn't
- configured with a native debugger, and target remote isn't
- connected yet. */
- t = find_default_run_target (NULL);
- if (t && t->to_is_async_p != delegate_is_async_p)
- return (t->to_is_async_p) (t);
- return 0;
-}
+/* See target.h. */
-static int
-find_default_supports_non_stop (struct target_ops *self)
+struct target_ops *
+find_run_target (void)
{
struct target_ops *t;
- t = find_default_run_target (NULL);
- if (t && t->to_supports_non_stop)
- return (t->to_supports_non_stop) (t);
- return 0;
-}
-
-int
-target_supports_non_stop (void)
-{
- struct target_ops *t;
+ /* If a target on the current stack can attach, use it. */
+ for (t = current_target.beneath; t != NULL; t = t->beneath)
+ {
+ if (t->to_create_inferior != NULL)
+ break;
+ }
- for (t = ¤t_target; t != NULL; t = t->beneath)
- if (t->to_supports_non_stop)
- return t->to_supports_non_stop (t);
+ /* Otherwise, use the default run target. */
+ if (t == NULL)
+ t = find_default_run_target ("run");
- return 0;
+ return t;
}
/* Implement the "info proc" command. */
dummy_target.to_shortname = "None";
dummy_target.to_longname = "None";
dummy_target.to_doc = "";
- dummy_target.to_create_inferior = find_default_create_inferior;
- dummy_target.to_supports_non_stop = find_default_supports_non_stop;
dummy_target.to_supports_disable_randomization
= find_default_supports_disable_randomization;
dummy_target.to_stratum = dummy_stratum;
fprintf_unfiltered (gdb_stdlog, "target_close ()\n");
}
-void
-target_attach (char *args, int from_tty)
-{
- current_target.to_attach (¤t_target, args, from_tty);
- if (targetdebug)
- fprintf_unfiltered (gdb_stdlog, "target_attach (%s, %d)\n",
- args, from_tty);
-}
-
int
target_thread_alive (ptid_t ptid)
{
return retval;
}
+int
+simple_verify_memory (struct target_ops *ops,
+ const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
+{
+ LONGEST total_xfered = 0;
+
+ while (total_xfered < size)
+ {
+ ULONGEST xfered_len;
+ enum target_xfer_status status;
+ gdb_byte buf[1024];
+ ULONGEST howmuch = min (sizeof (buf), size - total_xfered);
+
+ status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
+ buf, NULL, lma + total_xfered, howmuch,
+ &xfered_len);
+ if (status == TARGET_XFER_OK
+ && memcmp (data + total_xfered, buf, xfered_len) == 0)
+ {
+ total_xfered += xfered_len;
+ QUIT;
+ }
+ else
+ return 0;
+ }
+ return 1;
+}
+
+/* Default implementation of memory verification. */
+
+static int
+default_verify_memory (struct target_ops *self,
+ const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
+{
+ /* Start over from the top of the target stack. */
+ return simple_verify_memory (current_target.beneath,
+ data, memaddr, size);
+}
+
int
target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
{
}
}
-/* Controls if async mode is permitted. */
-int target_async_permitted = 0;
+/* Controls if targets can report that they can/are async. This is
+ just for maintainers to use when debugging gdb. */
+int target_async_permitted = 1;
/* The set command writes to this variable. If the inferior is
executing, target_async_permitted is *not* updated. */
-static int target_async_permitted_1 = 0;
+static int target_async_permitted_1 = 1;
static void
-set_target_async_command (char *args, int from_tty,
- struct cmd_list_element *c)
+maint_set_target_async_command (char *args, int from_tty,
+ struct cmd_list_element *c)
{
if (have_live_inferiors ())
{
}
static void
-show_target_async_command (struct ui_file *file, int from_tty,
- struct cmd_list_element *c,
- const char *value)
+maint_show_target_async_command (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c,
+ const char *value)
{
fprintf_filtered (file,
_("Controlling the inferior in "
Set whether gdb controls the inferior in asynchronous mode."), _("\
Show whether gdb controls the inferior in asynchronous mode."), _("\
Tells gdb whether to control the inferior in asynchronous mode."),
- set_target_async_command,
- show_target_async_command,
- &setlist,
- &showlist);
+ maint_set_target_async_command,
+ maint_show_target_async_command,
+ &maintenance_set_cmdlist,
+ &maintenance_show_cmdlist);
add_setshow_boolean_cmd ("may-write-registers", class_support,
&may_write_registers_1, _("\
Otherwise, any attempt to interrupt or stop will be ignored."),
set_target_permissions, NULL,
&setlist, &showlist);
+
+ add_setshow_boolean_cmd ("auto-connect-native-target", class_support,
+ &auto_connect_native_target, _("\
+Set whether GDB may automatically connect to the native target."), _("\
+Show whether GDB may automatically connect to the native target."), _("\
+When on, and GDB is not connected to a target yet, GDB\n\
+attempts \"run\" and other commands with the native target."),
+ NULL, show_auto_connect_native_target,
+ &setlist, &showlist);
}
projects / deliverable / binutils-gdb.git / blobdiff