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Split decode_entry

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svn path=/trunk/; revision=408
This commit is contained in:
Søren Sandmann Pedersen
2008-03-29 23:02:01 +00:00
parent a2f8d00fc2
commit 5d06134d54
1 changed files with 67 additions and 30 deletions
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97
unwind.c
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@ -225,51 +225,84 @@ decode_instruction (const guchar **data)
} }
} }
static void static void
decode_entry (const guchar *data) decode_cie (const guchar **data, const guchar *end)
{ {
guint64 len, aug_len;
const guchar *end;
gboolean has_augmentation; gboolean has_augmentation;
guint64 aug_len;
g_print ("version: %d\n", *(*data)++);
g_print ("augmentation: %s\n", *data);
has_augmentation = strchr (*data, 'z');
*data += strlen (*data) + 1;
len = get_length (&data); g_print ("code alignment: %llu\n", decode_uleb128 (data));
end = data + len; g_print ("data alignment: %lld\n", decode_sleb128 (data));
g_print ("return register: %llu\n", decode_uleb128 (data));
if (has_augmentation)
{
g_print ("augmentation length: %llu\n",
(aug_len = decode_uleb128 (data)));
*data += aug_len;
}
while (*data < end)
g_print (" %s\n", decode_instruction (data));
}
static gboolean
decode_fde (const guchar **data, const guchar *end)
{
return FALSE;
}
static gboolean
decode_entry (const guchar **data, gboolean eh_frame)
{
guint64 len;
const guchar *end;
gboolean is_cie;
guint64 id;
len = get_length (data);
if (len == 0)
return FALSE;
end = *data + len;
g_print ("length: %llu\n", len); g_print ("length: %llu\n", len);
/* CIE_id is 0 for eh frames, and 0xffffffff/0xffffffffffffffff for .debug_frame */ /* CIE_id is 0 for eh frames, and 0xffffffff/0xffffffffffffffff for .debug_frame */
g_print ("id: %d\n", *(guint32 *)data); id = *(guint32 *)*data;
data += 4; g_print ("id: %lld\n", id);
g_print ("version: %d\n", *data); is_cie = (eh_frame && id == 0) || (!eh_frame && id == 0xffffffff);
data += 1; if (is_cie)
g_print ("is cie\n");
g_print ("augmentation: %s\n", data); else
g_print ("is not cie\n");
has_augmentation = strchr (data, 'z');
data += strlen (data) + 1; *data += 4;
g_print ("code alignment: %llu\n", decode_uleb128 (&data)); if (is_cie)
decode_cie (data, end);
g_print ("data alignment: %lld\n", decode_sleb128 (&data)); else
decode_fde (data, end);
g_print ("return register: %llu\n", decode_uleb128 (&data));
if (has_augmentation)
{
g_print ("augmentation length: %llu\n", (aug_len = decode_uleb128 (&data)));
data += aug_len;
}
while (data < end) return TRUE;
g_print (" %s\n", decode_instruction (&data));
} }
/* The correct API is probably something like /* The correct API is probably something like
@ -286,14 +319,17 @@ void
unwind (ElfParser *elf) unwind (ElfParser *elf)
{ {
const guchar *data; const guchar *data;
gboolean eh_f;
if ((data = elf_parser_get_debug_frame (elf))) if ((data = elf_parser_get_debug_frame (elf)))
{ {
g_print ("Using .debug_frame\n"); g_print ("Using .debug_frame\n");
eh_f = FALSE;
} }
else if ((data = elf_parser_get_eh_frame (elf))) else if ((data = elf_parser_get_eh_frame (elf)))
{ {
g_print ("Using .eh_frame\n"); g_print ("Using .eh_frame\n");
eh_f = TRUE;
} }
else else
{ {
@ -301,6 +337,7 @@ unwind (ElfParser *elf)
return; return;
} }
decode_entry (data); while (decode_entry (&data, eh_f))
;
} }