From: Richard Henderson <rth@redhat.com>
Date: Sun, 1 Jun 2003 16:08:54 +0000 (+0000)
Subject:         * dwarf2-frame.c (struct dwarf2_cie): Add saw_z_augmentation.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7131cb6efde3fabac3c1d91b1063caf9f84d5037;p=binutils-gdb.git

    * dwarf2-frame.c (struct dwarf2_cie): Add saw_z_augmentation.
        (decode_frame_entry): Set it.  Skip FDE augmentation.
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 121ba17acb2..7e35d40b660 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2003-06-01  Richard Henderson  <rth@redhat.com>
+
+        * dwarf2-frame.c (struct dwarf2_cie): Add saw_z_augmentation.
+        (decode_frame_entry): Set it.  Skip FDE augmentation.
+
 2003-06-01  Richard Henderson  <rth@redhat.com>
 
         * dwarf2-frame.c (dwarf2_frame_cache): Handle retaddr_column
diff --git a/gdb/dwarf2-frame.c b/gdb/dwarf2-frame.c
index f406e64ca31..7dbd0dbf753 100644
--- a/gdb/dwarf2-frame.c
+++ b/gdb/dwarf2-frame.c
@@ -65,6 +65,9 @@ struct dwarf2_cie
   /* Encoding of addresses.  */
   unsigned char encoding;
 
+  /* True if a 'z' augmentation existed.  */
+  unsigned char saw_z_augmentation;
+
   struct dwarf2_cie *next;
 };
 
@@ -1111,7 +1114,8 @@ decode_frame_entry (struct comp_unit *unit, char *buf, int eh_frame_p)
       cie->return_address_register = read_1_byte (unit->abfd, buf);
       buf += 1;
 
-      if (*augmentation == 'z')
+      cie->saw_z_augmentation = (*augmentation == 'z');
+      if (cie->saw_z_augmentation)
 	{
 	  ULONGEST length;
 
@@ -1200,6 +1204,18 @@ decode_frame_entry (struct comp_unit *unit, char *buf, int eh_frame_p)
 	read_encoded_value (unit, fde->cie->encoding & 0x0f, buf, &bytes_read);
       buf += bytes_read;
 
+      /* A 'z' augmentation in the CIE implies the presence of an
+	 augmentation field in the FDE as well.  The only thing known
+	 to be in here at present is the LSDA entry for EH.  So we
+	 can skip the whole thing.  */
+      if (fde->cie->saw_z_augmentation)
+	{
+	  ULONGEST length;
+
+	  length = read_unsigned_leb128 (unit->abfd, buf, &bytes_read);
+	  buf += bytes_read + length;
+	}
+
       fde->instructions = buf;
       fde->end = end;