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Add a new gdbarch hook to report additional signal information.

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This is a more general version of the existing handle_segmentation_fault
hook that is able to report information for an arbitrary signal, not
just SIGSEGV.

gdb/ChangeLog:

	* gdbarch.c: Regenerate.
	* gdbarch.h: Regenerate.
	* gdbarch.sh (report_signal_info): New method.
	* infrun.c (print_signal_received_reason): Invoke gdbarch
	report_signal_info hook if present.
This commit is contained in:
John Baldwin 2020-07-21 17:28:16 -07:00
parent 98f5f7740a
commit 272bb05cc5
5 changed files with 60 additions and 0 deletions
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8
gdb/ChangeLog
View File

@ -1,3 +1,11 @@
2020-07-21 John Baldwin <jhb@FreeBSD.org>
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
* gdbarch.sh (report_signal_info): New method.
* infrun.c (print_signal_received_reason): Invoke gdbarch
report_signal_info hook if present.
2020-07-21 Andrew Burgess <andrew.burgess@embecosm.com>
* python/py-registers.c : Add 'unordered_map' include.

32
gdb/gdbarch.c
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@ -192,6 +192,7 @@ struct gdbarch
gdbarch_ax_pseudo_register_collect_ftype *ax_pseudo_register_collect;
gdbarch_ax_pseudo_register_push_stack_ftype *ax_pseudo_register_push_stack;
gdbarch_handle_segmentation_fault_ftype *handle_segmentation_fault;
gdbarch_report_signal_info_ftype *report_signal_info;
int sp_regnum;
int pc_regnum;
int ps_regnum;
@ -556,6 +557,7 @@ verify_gdbarch (struct gdbarch *gdbarch)
/* Skip verify of ax_pseudo_register_collect, has predicate. */
/* Skip verify of ax_pseudo_register_push_stack, has predicate. */
/* Skip verify of handle_segmentation_fault, has predicate. */
/* Skip verify of report_signal_info, has predicate. */
/* Skip verify of sp_regnum, invalid_p == 0 */
/* Skip verify of pc_regnum, invalid_p == 0 */
/* Skip verify of ps_regnum, invalid_p == 0 */
@ -1320,6 +1322,12 @@ gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
fprintf_unfiltered (file,
"gdbarch_dump: remote_register_number = <%s>\n",
host_address_to_string (gdbarch->remote_register_number));
fprintf_unfiltered (file,
"gdbarch_dump: gdbarch_report_signal_info_p() = %d\n",
gdbarch_report_signal_info_p (gdbarch));
fprintf_unfiltered (file,
"gdbarch_dump: report_signal_info = <%s>\n",
host_address_to_string (gdbarch->report_signal_info));
fprintf_unfiltered (file,
"gdbarch_dump: return_in_first_hidden_param_p = <%s>\n",
host_address_to_string (gdbarch->return_in_first_hidden_param_p));
@ -2113,6 +2121,30 @@ set_gdbarch_handle_segmentation_fault (struct gdbarch *gdbarch,
gdbarch->handle_segmentation_fault = handle_segmentation_fault;
}
int
gdbarch_report_signal_info_p (struct gdbarch *gdbarch)
{
gdb_assert (gdbarch != NULL);
return gdbarch->report_signal_info != NULL;
}
void
gdbarch_report_signal_info (struct gdbarch *gdbarch, struct ui_out *uiout, enum gdb_signal siggnal)
{
gdb_assert (gdbarch != NULL);
gdb_assert (gdbarch->report_signal_info != NULL);
if (gdbarch_debug >= 2)
fprintf_unfiltered (gdb_stdlog, "gdbarch_report_signal_info called\n");
gdbarch->report_signal_info (gdbarch, uiout, siggnal);
}
void
set_gdbarch_report_signal_info (struct gdbarch *gdbarch,
gdbarch_report_signal_info_ftype report_signal_info)
{
gdbarch->report_signal_info = report_signal_info;
}
int
gdbarch_sp_regnum (struct gdbarch *gdbarch)
{

10
gdb/gdbarch.h
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@ -332,6 +332,16 @@ typedef void (gdbarch_handle_segmentation_fault_ftype) (struct gdbarch *gdbarch,
extern void gdbarch_handle_segmentation_fault (struct gdbarch *gdbarch, struct ui_out *uiout);
extern void set_gdbarch_handle_segmentation_fault (struct gdbarch *gdbarch, gdbarch_handle_segmentation_fault_ftype *handle_segmentation_fault);
/* Some architectures can display additional information for specific
signals.
UIOUT is the output stream where the handler will place information. */
extern int gdbarch_report_signal_info_p (struct gdbarch *gdbarch);
typedef void (gdbarch_report_signal_info_ftype) (struct gdbarch *gdbarch, struct ui_out *uiout, enum gdb_signal siggnal);
extern void gdbarch_report_signal_info (struct gdbarch *gdbarch, struct ui_out *uiout, enum gdb_signal siggnal);
extern void set_gdbarch_report_signal_info (struct gdbarch *gdbarch, gdbarch_report_signal_info_ftype *report_signal_info);
/* GDB's standard (or well known) register numbers. These can map onto
a real register or a pseudo (computed) register or not be defined at
all (-1).

5
gdb/gdbarch.sh
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@ -420,6 +420,11 @@ M;int;ax_pseudo_register_push_stack;struct agent_expr *ax, int reg;ax, reg
# UIOUT is the output stream where the handler will place information.
M;void;handle_segmentation_fault;struct ui_out *uiout;uiout
# Some architectures can display additional information for specific
# signals.
# UIOUT is the output stream where the handler will place information.
M;void;report_signal_info;struct ui_out *uiout, enum gdb_signal siggnal;uiout, siggnal
# GDB's standard (or well known) register numbers. These can map onto
# a real register or a pseudo (computed) register or not be defined at
# all (-1).

5
gdb/infrun.c
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@ -8299,6 +8299,11 @@ print_signal_received_reason (struct ui_out *uiout, enum gdb_signal siggnal)
annotate_signal_string ();
uiout->field_string ("signal-meaning", gdb_signal_to_string (siggnal));
struct regcache *regcache = get_current_regcache ();
struct gdbarch *gdbarch = regcache->arch ();
if (gdbarch_report_signal_info_p (gdbarch))
gdbarch_report_signal_info (gdbarch, uiout, siggnal);
if (siggnal == GDB_SIGNAL_SEGV)
handle_segmentation_fault (uiout);