Add various constants

2008-04-26  Soren Sandmann <sandmann@daimi.au.dk>

        * unwind.c: Add various constants

svn path=/trunk/; revision=412

diff --git a/ChangeLog b/ChangeLog
index 5f68a65..14c90ac 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2008-04-26  Soren Sandmann <sandmann@daimi.au.dk>
+
+       * unwind.c: Add various constants
+
 Mon Apr 21 15:54:24 2008  Søren Sandmann  <sandmann@redhat.com>
 
        * binfile.c: More build-id support

diff --git a/unwind.c b/unwind.c
index 4cf51f0..3631c75 100644 (file)
--- a/unwind.c
+++ b/unwind.c
@@ -2,7 +2,38 @@
 #include "binparser.h"
 #include <string.h>
 
-/* FIXME: endianness, 64 bit */
+/* Pointer encodings, from dwarf2.h.  */
+typedef enum
+{
+    DW_EH_PE_absptr    = 0x00, /* */
+    DW_EH_PE_omit      = 0xff, /* Value is not there */
+
+    DW_EH_PE_uleb128   = 0x01,
+    DW_EH_PE_udata2    = 0x02,
+    DW_EH_PE_udata4    = 0x03,
+    DW_EH_PE_udata8    = 0x04,
+    DW_EH_PE_sleb128   = 0x09,
+    DW_EH_PE_sdata2    = 0x0A,
+    DW_EH_PE_sdata4    = 0x0B,
+    DW_EH_PE_sdata8    = 0x0C,
+    DW_EH_PE_signed    = 0x08,
+
+    DW_EH_PE_pcrel     = 0x10, /* Value is *(cur + val) */
+    DW_EH_PE_textrel   = 0x20, /* Value is *(&text + val) */
+    DW_EH_PE_datarel   = 0x30, /* Value is *(&data + val) */
+    DW_EH_PE_funcrel   = 0x40, /* Value is *(fde.pc_begin + val) */
+    DW_EH_PE_aligned   = 0x50, /* Value is absolute, and stored
+                                * at next align */
+
+    DW_EH_PE_indirect  = 0x80
+} PointerEncoding;
+
+typedef struct EncodedPointer EncodedPointer;
+struct EncodedPointer
+{
+    PointerEncoding    encoding;
+    guint64            value;
+};
 
 static guint64
 get_length (const guchar **data)
@@ -225,17 +256,24 @@ decode_instruction (const guchar **data)
     }
 }
 
+typedef struct CIE CIE;
+struct CIE
+{
+    PointerEncoding    encoding;
+};
+
 static void
 decode_cie (const guchar **data, const guchar *end)
 {
     gboolean has_augmentation;
     guint64 aug_len;
+    char *augmentation;
+    CIE *cie;
+    int i, field;
     
     g_print ("version: %d\n", *(*data)++);
-    
-    g_print ("augmentation: %s\n", *data);
-    
-    has_augmentation = strchr (*data, 'z');
+
+    augmentation = (*data);
     
     *data += strlen (*data) + 1;
 
@@ -245,11 +283,28 @@ decode_cie (const guchar **data, const guchar *end)
 
     g_print ("return register: %llu\n", decode_uleb128 (data));
 
-    if (has_augmentation)
+    g_print ("augmentation: %s\n", augmentation);
+    
+    if (augmentation[0] == 'z')
     {
-       g_print ("augmentation length: %llu\n",
-                (aug_len = decode_uleb128 (data)));
+       aug_len = decode_uleb128 (data);
 
+       g_print ("len: %llu\n", aug_len);
+       
+       for (i = 1; augmentation[i] != 0; ++i)
+       {
+           if (augmentation[i] == 'L')
+           {
+               
+           }
+       }
+    }
+    
+    
+    if (has_augmentation)
+    {
+       g_print ("%x\n", **data);
+       
        *data += aug_len;
     }
     
@@ -338,6 +393,7 @@ unwind (ElfParser *elf)
     }
 
     while (decode_entry (&data, eh_f))
+       return ;
        ;
 }