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* gdbarch.sh (displaced_step_hw_singlestep): New callback.

Browse Source 
* gdbarch.c, gdbarch.h: Regenerate.
	* arch-utils.c (default_displaced_step_hw_singlestep): New function.
	* arch-utils.h (default_displaced_step_hw_singlestep): Add prototype.

	* ppc-linux-tdep.c (ppc_displaced_step_hw_singlestep): New function.
	(rs6000_gdbarch_init): Install it.

	* infrun.c (displaced_step_fixup): Use new callback to determine
	whether to "step" or "continue" displaced copy.
	(resume): Likewise.  Do not call maybe_software_singlestep
	for displaced stepping.
	(maybe_software_singlestep): Do not handle displaced stepping.
This commit is contained in:
Ulrich Weigand
2009-09-29 00:53:04 +00:00
parent 69368a60a4
commit 99e4058030
8 changed files with 103 additions and 16 deletions
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24
gdb/gdbarch.c
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@ -232,6 +232,7 @@ struct gdbarch
gdbarch_skip_permanent_breakpoint_ftype *skip_permanent_breakpoint;
ULONGEST max_insn_length;
gdbarch_displaced_step_copy_insn_ftype *displaced_step_copy_insn;
gdbarch_displaced_step_hw_singlestep_ftype *displaced_step_hw_singlestep;
gdbarch_displaced_step_fixup_ftype *displaced_step_fixup;
gdbarch_displaced_step_free_closure_ftype *displaced_step_free_closure;
gdbarch_displaced_step_location_ftype *displaced_step_location;
@ -371,6 +372,7 @@ struct gdbarch startup_gdbarch =
0, /* skip_permanent_breakpoint */
0, /* max_insn_length */
0, /* displaced_step_copy_insn */
default_displaced_step_hw_singlestep, /* displaced_step_hw_singlestep */
0, /* displaced_step_fixup */
NULL, /* displaced_step_free_closure */
NULL, /* displaced_step_location */
@ -464,6 +466,7 @@ gdbarch_alloc (const struct gdbarch_info *info,
gdbarch->elf_make_msymbol_special = default_elf_make_msymbol_special;
gdbarch->coff_make_msymbol_special = default_coff_make_msymbol_special;
gdbarch->register_reggroup_p = default_register_reggroup_p;
gdbarch->displaced_step_hw_singlestep = default_displaced_step_hw_singlestep;
gdbarch->displaced_step_fixup = NULL;
gdbarch->displaced_step_free_closure = NULL;
gdbarch->displaced_step_location = NULL;
@ -627,6 +630,7 @@ verify_gdbarch (struct gdbarch *gdbarch)
/* Skip verify of skip_permanent_breakpoint, has predicate */
/* Skip verify of max_insn_length, has predicate */
/* Skip verify of displaced_step_copy_insn, has predicate */
/* Skip verify of displaced_step_hw_singlestep, invalid_p == 0 */
/* Skip verify of displaced_step_fixup, has predicate */
if ((! gdbarch->displaced_step_free_closure) != (! gdbarch->displaced_step_copy_insn))
fprintf_unfiltered (log, "\n\tdisplaced_step_free_closure");
@ -790,6 +794,9 @@ gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
fprintf_unfiltered (file,
"gdbarch_dump: displaced_step_free_closure = <%s>\n",
host_address_to_string (gdbarch->displaced_step_free_closure));
fprintf_unfiltered (file,
"gdbarch_dump: displaced_step_hw_singlestep = <%s>\n",
host_address_to_string (gdbarch->displaced_step_hw_singlestep));
fprintf_unfiltered (file,
"gdbarch_dump: displaced_step_location = <%s>\n",
host_address_to_string (gdbarch->displaced_step_location));
@ -3144,6 +3151,23 @@ set_gdbarch_displaced_step_copy_insn (struct gdbarch *gdbarch,
gdbarch->displaced_step_copy_insn = displaced_step_copy_insn;
}
int
gdbarch_displaced_step_hw_singlestep (struct gdbarch *gdbarch, struct displaced_step_closure *closure)
{
gdb_assert (gdbarch != NULL);
gdb_assert (gdbarch->displaced_step_hw_singlestep != NULL);
if (gdbarch_debug >= 2)
fprintf_unfiltered (gdb_stdlog, "gdbarch_displaced_step_hw_singlestep called\n");
return gdbarch->displaced_step_hw_singlestep (gdbarch, closure);
}
void
set_gdbarch_displaced_step_hw_singlestep (struct gdbarch *gdbarch,
gdbarch_displaced_step_hw_singlestep_ftype displaced_step_hw_singlestep)
{
gdbarch->displaced_step_hw_singlestep = displaced_step_hw_singlestep;
}
int
gdbarch_displaced_step_fixup_p (struct gdbarch *gdbarch)
{