dwarflint: Add DW_LNE_set_discriminator check and clean unknown upcode warn.

Print unknown (extended) opcodes has hex values.
Add dwarf_line_extended_opcode_string.
New simple DW_LNE_set_discriminator check (not zero).

1 files changed, 24 insertions, 1 deletions

diff --git a/src/dwarfstrings.c b/src/dwarfstrings.c
index 91933f01..9826cf30 100644
--- a/src/dwarfstrings.c
+++ b/src/dwarfstrings.c
@@ -765,7 +765,6 @@ dwarf_locexpr_opcode_string (unsigned int code)
   return ret;
 }
 
-
 const char *
 dwarf_line_standard_opcode_string (unsigned int code)
 {
@@ -789,3 +788,27 @@ dwarf_line_standard_opcode_string (unsigned int code)
 
   return ret;
 }
+
+const char *
+dwarf_line_extended_opcode_string (unsigned int code)
+{
+  static const char *const known[] =
+    {
+#define ONE_KNOWN_DW_LNE(NAME, CODE) [CODE] = #NAME,
+      ALL_KNOWN_DW_LNE
+#undef ONE_KNOWN_DW_LNE
+    };
+
+  const char *ret = NULL;
+  if (likely (code < sizeof (known) / sizeof (known[0])))
+    ret = known[code];
+
+  if (ret == NULL)
+    {
+      static char buf[40];
+      snprintf (buf, sizeof buf, gettext ("unknown opcode %x"), code);
+      ret = buf;
+    }
+
+  return ret;
+}