OpenE2K/binutils-gdb
12
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Use the target architecture when encoding tracepoint actions

Browse Source 
This patch uses the target architecture rather then the objfile
architecture when encoding tracepoint actions.

The target architecture may contain additional registers. E.g. ARM VFP
registers. This information is needed to allow their collection. Since we
can never know whether the registers numbers in the target match the
binary's we have to use tdesc here.

One note about combined debuggers / multi-inferior from Pedro Alves:

In the combined debugger case taking Cell as the practical example that
gdb supports currently:

In that case, the main target_gdbarch() will be powerpc, but you may have set a
tracepoint on _spu_ code, which has a different gdbarch.  so for that case,
target_gdbarch would be wrong.  I think that in that case, we'd need to
find __the_ target/tdesc gdbarch that is (bfd) compatible with the
objfile's gdbarch.

I think cell/spu gdbserver doesn't support tracepoints, so we can ignore
this for now.

The multi-inferior/process case is somewhat related, but its simpler.
each inferior has its own gdbarch.

That is, target_gdbarch depends on the current inferior selected.
In fact, that just returns inferior->gdbarch nowaways.

No regressions, tested on ubuntu 14.04 ARMv7 and x86.
With gdbserver-{native,extended} / { -marm -mthumb }

gdb/ChangeLog:

	* tracepoint.c (encode_actions_1): Use target_gdbarch () rather
	than loc->gdbarch.
This commit is contained in:
Antoine Tremblay 2016-02-11 08:14:12 -05:00
parent 32875eb1f3
commit 82e9becd8a
2 changed files with 11 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gdb/ChangeLog
View File

@ -1,3 +1,8 @@
2016-02-11 Antoine Tremblay <antoine.tremblay@ericsson.com>
* tracepoint.c (encode_actions_1): Use target_gdbarch () rather
than loc->gdbarch.
2016-02-10 Marcin Kościelnicki <koriakin@0x04.net>
* tracefile-tfile.c (trace_tdesc): New static variable.

12
gdb/tracepoint.c
View File

@ -1428,14 +1428,14 @@ encode_actions_1 (struct command_line *action,
if (0 == strncasecmp ("$reg", action_exp, 4))
{
for (i = 0; i < gdbarch_num_regs (tloc->gdbarch); i++)
for (i = 0; i < gdbarch_num_regs (target_gdbarch ()); i++)
add_register (collect, i);
action_exp = strchr (action_exp, ','); /* more? */
}
else if (0 == strncasecmp ("$arg", action_exp, 4))
{
add_local_symbols (collect,
tloc->gdbarch,
target_gdbarch (),
tloc->address,
frame_reg,
frame_offset,
@ -1446,7 +1446,7 @@ encode_actions_1 (struct command_line *action,
else if (0 == strncasecmp ("$loc", action_exp, 4))
{
add_local_symbols (collect,
tloc->gdbarch,
target_gdbarch (),
tloc->address,
frame_reg,
frame_offset,
@ -1459,7 +1459,7 @@ encode_actions_1 (struct command_line *action,
struct cleanup *old_chain1 = NULL;
aexpr = gen_trace_for_return_address (tloc->address,
tloc->gdbarch,
target_gdbarch (),
trace_string);
old_chain1 = make_cleanup_free_agent_expr (aexpr);
@ -1513,7 +1513,7 @@ encode_actions_1 (struct command_line *action,
{
const char *name = &exp->elts[2].string;
i = user_reg_map_name_to_regnum (tloc->gdbarch,
i = user_reg_map_name_to_regnum (target_gdbarch (),
name, strlen (name));
if (i == -1)
internal_error (__FILE__, __LINE__,
@ -1543,7 +1543,7 @@ encode_actions_1 (struct command_line *action,
collect_symbol (collect,
exp->elts[2].symbol,
tloc->gdbarch,
target_gdbarch (),
frame_reg,
frame_offset,
tloc->address,