darkkirb/old-cross-binutils
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

record-btrace: supply register target methods

Browse source 
Supply target methods to allow reading the PC.  Forbid anything else.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

	* record-btrace.c (record_btrace_fetch_registers)
	(record_btrace_store_registers)
	(record_btrace_to_prepare_to_store): New.
	(init_record_btrace_ops): Add the above.
This commit is contained in:
Markus Metzger 2013-03-28 10:38:24 +01:00
parent f32dbf8c79
commit 1f3ef5810c
2 changed files with 99 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
gdb/ChangeLog
View file

@ -1,3 +1,10 @@
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* record-btrace.c (record_btrace_fetch_registers)
(record_btrace_store_registers)
(record_btrace_to_prepare_to_store): New.
(init_record_btrace_ops): Add the above.
2014-01-16 Tom Tromey <tromey@redhat.com>
* windows-nat.c (windows_prepare_to_store): Add 'self' argument.

92
gdb/record-btrace.c
View file

@ -32,6 +32,7 @@
#include "ui-out.h"
#include "symtab.h"
#include "filenames.h"
#include "regcache.h"
/* The target_ops of record-btrace. */
static struct target_ops record_btrace_ops;
@ -750,6 +751,94 @@ record_btrace_is_replaying (void)
return 0;
}
/* The to_fetch_registers method of target record-btrace. */
static void
record_btrace_fetch_registers (struct target_ops *ops,
struct regcache *regcache, int regno)
{
struct btrace_insn_iterator *replay;
struct thread_info *tp;
tp = find_thread_ptid (inferior_ptid);
gdb_assert (tp != NULL);
replay = tp->btrace.replay;
if (replay != NULL)
{
const struct btrace_insn *insn;
struct gdbarch *gdbarch;
int pcreg;
gdbarch = get_regcache_arch (regcache);
pcreg = gdbarch_pc_regnum (gdbarch);
if (pcreg < 0)
return;
/* We can only provide the PC register. */
if (regno >= 0 && regno != pcreg)
return;
insn = btrace_insn_get (replay);
gdb_assert (insn != NULL);
regcache_raw_supply (regcache, regno, &insn->pc);
}
else
{
struct target_ops *t;
for (t = ops->beneath; t != NULL; t = t->beneath)
if (t->to_fetch_registers != NULL)
{
t->to_fetch_registers (t, regcache, regno);
break;
}
}
}
/* The to_store_registers method of target record-btrace. */
static void
record_btrace_store_registers (struct target_ops *ops,
struct regcache *regcache, int regno)
{
struct target_ops *t;
if (record_btrace_is_replaying ())
error (_("This record target does not allow writing registers."));
gdb_assert (may_write_registers != 0);
for (t = ops->beneath; t != NULL; t = t->beneath)
if (t->to_store_registers != NULL)
{
t->to_store_registers (t, regcache, regno);
return;
}
noprocess ();
}
/* The to_prepare_to_store method of target record-btrace. */
static void
record_btrace_prepare_to_store (struct target_ops *ops,
struct regcache *regcache)
{
struct target_ops *t;
if (record_btrace_is_replaying ())
return;
for (t = ops->beneath; t != NULL; t = t->beneath)
if (t->to_prepare_to_store != NULL)
{
t->to_prepare_to_store (t, regcache);
return;
}
}
/* Initialize the record-btrace target ops. */
static void
@ -777,6 +866,9 @@ init_record_btrace_ops (void)
ops->to_call_history_from = record_btrace_call_history_from;
ops->to_call_history_range = record_btrace_call_history_range;
ops->to_record_is_replaying = record_btrace_is_replaying;
ops->to_fetch_registers = record_btrace_fetch_registers;
ops->to_store_registers = record_btrace_store_registers;
ops->to_prepare_to_store = record_btrace_prepare_to_store;
ops->to_stratum = record_stratum;
ops->to_magic = OPS_MAGIC;
}