[PATCH 06/10] Add DW_OP_GNU_parameter_ref to dwarf.h and handle it in readelf.

[Mark Wielaard]

DW_OP_GNU_parameter_ref takes as operand a 4 byte CU relative reference
to the abstract optimized away DW_TAG_formal_parameter.

Signed-off-by: Mark Wielaard <m...@redhat.com>
---
 libdw/ChangeLog |  4 ++++
 libdw/dwarf.h   |  1 +
 src/ChangeLog   |  4 ++++
 src/readelf.c   | 12 ++++++++++++
 4 files changed, 21 insertions(+)

diff --git a/libdw/ChangeLog b/libdw/ChangeLog
index bda66d2..ec50d41 100644
--- a/libdw/ChangeLog
+++ b/libdw/ChangeLog
@@ -1,3 +1,7 @@
+2012-07-19  Mark Wielaard  <m...@redhat.com>
+
+       * dwarf.h: Add DW_OP_GNU_parameter_ref.
+
 2012-07-25  Mark Wielaard  <m...@redhat.com>
 
        * libdw.h: Declare dwarf_tag_string, dwarf_attr_string,
diff --git a/libdw/dwarf.h b/libdw/dwarf.h
index 880d62c..641ed73 100644
--- a/libdw/dwarf.h
+++ b/libdw/dwarf.h
@@ -472,6 +472,7 @@ enum
     DW_OP_GNU_deref_type = 0xf6,
     DW_OP_GNU_convert = 0xf7,
     DW_OP_GNU_reinterpret = 0xf9,
+    DW_OP_GNU_parameter_ref = 0xfa,
 
     DW_OP_lo_user = 0xe0,      /* Implementation-defined range start.  */
     DW_OP_hi_user = 0xff       /* Implementation-defined range end.  */
diff --git a/src/ChangeLog b/src/ChangeLog
index 7c6ed6d..3560245 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,7 @@
+2012-07-19  Mark Wielaard  <m...@redhat.com>
+
+       * readelf.c (print_ops): Handle DW_OP_GNU_parameter_ref.
+
 2012-07-25  Mark Wielaard  <m...@redhat.com>
 
        * readelf.c: Remove dwarfstrings.c include.
diff --git a/src/readelf.c b/src/readelf.c
index 947c7be..01cf149 100644
--- a/src/readelf.c
+++ b/src/readelf.c
@@ -3720,6 +3720,18 @@ print_ops (Dwfl_Module *dwflmod, Dwarf *dbg, int indent, 
int indentrest,
          offset += 1 + (data - start);
          break;
 
+       case DW_OP_GNU_parameter_ref:
+         /* 4 byte CU relative reference to the abstract optimized away
+            DW_TAG_formal_parameter.  */
+         NEED (4);
+         printf ("%*s[%4" PRIuMAX "] %s [%6" PRIxMAX "]\n",
+                 indent, "", (uintmax_t) offset, op_name,
+                 (uintmax_t) read_4ubyte_unaligned (dbg, data));
+         CONSUME (4);
+         data += 4;
+         offset += 5;
+         break;
+
        default:
          /* No Operand.  */
            printf ("%*s[%4" PRIuMAX "] %s\n",
-- 
1.7.11.2

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