[patch v10 18/21] record-btrace, disas: omit pc prefix

[Markus Metzger <markus.t.metzger@intel.com>]

Add a disassembly flag to omit the pc prefix and use it in the "record
instruction-history" command of record-btrace.

The pc prefix would appear multiple times in the branch trace disassembly,
which is more confusing than helpful.

Approved by Jan Kratochvil.

2013-03-08  Markus Metzger  <markus.t.metzger@intel.com>

	* record-btrace.c (btrace_insn_history): Omit the pc prefix in
	the instruction history disassembly.
	* disasm.c (dump_insns): Omit the pc prefix, if requested.
	* disasm.h (DISASSEMBLY_OMIT_PC): New.


---
 gdb/disasm.c |    4 +++-
 gdb/disasm.h |    1 +
 gdb/record.c |    4 ++++
 3 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/gdb/disasm.c b/gdb/disasm.c
index 9d61379..e643c2d 100644
--- a/gdb/disasm.c
+++ b/gdb/disasm.c
@@ -122,7 +122,9 @@ dump_insns (struct gdbarch *gdbarch, struct ui_out *uiout,
 	    num_displayed++;
 	}
       ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
-      ui_out_text (uiout, pc_prefix (pc));
+
+      if ((flags & DISASSEMBLY_OMIT_PC) == 0)
+	ui_out_text (uiout, pc_prefix (pc));
       ui_out_field_core_addr (uiout, "address", gdbarch, pc);
 
       if (!build_address_symbolic (gdbarch, pc, 0, &name, &offset, &filename,
diff --git a/gdb/disasm.h b/gdb/disasm.h
index 20ceb2b..3743ccc 100644
--- a/gdb/disasm.h
+++ b/gdb/disasm.h
@@ -23,6 +23,7 @@
 #define DISASSEMBLY_RAW_INSN	(0x1 << 1)
 #define DISASSEMBLY_OMIT_FNAME	(0x1 << 2)
 #define DISASSEMBLY_FILENAME	(0x1 << 3)
+#define DISASSEMBLY_OMIT_PC	(0x1 << 4)
 
 struct ui_out;
 struct ui_file;
diff --git a/gdb/record.c b/gdb/record.c
index 12ab179..83f4e1b 100644
--- a/gdb/record.c
+++ b/gdb/record.c
@@ -386,6 +386,9 @@ get_insn_history_modifiers (char **arg)
 	    case 'f':
 	      modifiers |= DISASSEMBLY_OMIT_FNAME;
 	      break;
+	    case 'p':
+	      modifiers |= DISASSEMBLY_OMIT_PC;
+	      break;
 	    default:
 	      error (_("Invalid modifier: %c."), *args);
 	    }
@@ -666,6 +669,7 @@ Print disassembled instructions stored in the execution log.\n\
 With a /m modifier, source lines are included (if available).\n\
 With a /r modifier, raw instructions in hex are included.\n\
 With a /f modifier, function names are omitted.\n\
+With a /p modifier, current position markers are omitted.\n\
 With no argument, disassembles ten more instructions after the previous \
 disassembly.\n\
 \"record instruction-history -\" disassembles ten instructions before a \
-- 
1.7.1