readelf: Handle DW_LLE_GNU_view_pair
Commit Message
DW_LLE_GNU_view_pair is used by gcc -gvariable-location-views=incompat5.
As described in http://www.fsfla.org/~lxoliva/papers/sfn/dwarf6-sfn-lvu.txt
and proposed for DWARF6 https://dwarfstd.org/ShowIssue.php?issue=170427.1
Signed-off-by: Mark Wielaard <mark@klomp.org>
---
libdw/ChangeLog | 4 ++++
libdw/dwarf.h | 6 +++++-
src/ChangeLog | 6 ++++++
src/readelf.c | 12 ++++++++++++
4 files changed, 27 insertions(+), 1 deletion(-)
Comments
Hi,
On Thu, 2022-10-20 at 00:02 +0200, Mark Wielaard wrote:
> DW_LLE_GNU_view_pair is used by gcc -gvariable-location-
> views=incompat5.
> As described in
> http://www.fsfla.org/~lxoliva/papers/sfn/dwarf6-sfn-lvu.txt
> and proposed for DWARF6
> https://dwarfstd.org/ShowIssue.php?issue=170427.1
Pushed,
Mark
@@ -1,3 +1,7 @@
+2022-10-19 Mark Wielaard <mark@klomp.org>
+
+ * dwarf.h (DW_LLE_GNU_view_pair): New constant.
+
2022-09-20 Yonggang Luo <luoyonggang@gmail.com>
* memory-access.h: Use BYTE_ORDER, LITTLE_ENDIAN and BIG_ENDIAN.
@@ -931,7 +931,11 @@ enum
DW_LLE_GNU_end_of_list_entry = 0x0,
DW_LLE_GNU_base_address_selection_entry = 0x1,
DW_LLE_GNU_start_end_entry = 0x2,
- DW_LLE_GNU_start_length_entry = 0x3
+ DW_LLE_GNU_start_length_entry = 0x3,
+
+ // http://www.fsfla.org/~lxoliva/papers/sfn/dwarf6-sfn-lvu.txt
+ // https://dwarfstd.org/ShowIssue.php?issue=170427.1
+ DW_LLE_GNU_view_pair = 0x9
};
/* DWARF5 package file section identifiers. */
@@ -1,3 +1,9 @@
+2022-10-19 Mark Wielaard <mark@klomp.org>
+
+ * readelf.c (dwarf_loc_list_encoding_string): Handle
+ DW_LLE_GNU_view_pair.
+ (print_debug_loclists_section): Likewise.
+
2022-09-20 Yonggang Luo <luoyonggang@gmail.com>
* arlib.h: Use BYTE_ORDER, LITTLE_ENDIAN and BIG_ENDIAN.
@@ -4185,6 +4185,8 @@ dwarf_loc_list_encoding_string (unsigned int kind)
#define DWARF_ONE_KNOWN_DW_LLE(NAME, CODE) case CODE: return #NAME;
DWARF_ALL_KNOWN_DW_LLE
#undef DWARF_ONE_KNOWN_DW_LLE
+ /* DW_LLE_GNU_view_pair is special/incompatible with default codes. */
+ case DW_LLE_GNU_view_pair: return "GNU_view_pair";
default:
return NULL;
}
@@ -9744,6 +9746,16 @@ print_debug_loclists_section (Dwfl_Module *dwflmod,
readp += len;
break;
+ case DW_LLE_GNU_view_pair:
+ if ((uint64_t) (nexthdr - readp) < 1)
+ goto invalid_entry;
+ get_uleb128 (op1, readp, nexthdr);
+ if ((uint64_t) (nexthdr - readp) < 1)
+ goto invalid_entry;
+ get_uleb128 (op2, readp, nexthdr);
+ printf (" %" PRIx64 ", %" PRIx64 "\n", op1, op2);
+ break;
+
default:
goto invalid_entry;
}