/* Subroutines needed for unwinding stack frames for exception handling. */
-/* Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2008
+ Free Software Foundation, Inc.
Contributed by Jason Merrill <jason@cygnus.com>.
This file is part of GCC.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
#ifndef _Unwind_Find_FDE
#include "tconfig.h"
/* The unseen_objects list contains objects that have been registered
but not yet categorized in any way. The seen_objects list has had
- it's pc_begin and count fields initialized at minimum, and is sorted
+ its pc_begin and count fields initialized at minimum, and is sorted
by decreasing value of pc_begin. */
static struct object *unseen_objects;
static struct object *seen_objects;
void *tbase, void *dbase)
{
/* If .eh_frame is empty, don't register at all. */
- if ((uword *) begin == 0 || *(uword *) begin == 0)
+ if ((const uword *) begin == 0 || *(const uword *) begin == 0)
return;
ob->pc_begin = (void *)-1;
from crtbegin (wherein it is declared weak), and this object does
not get pulled from libgcc.a for other reasons, then the
invocation of __deregister_frame_info will be resolved from glibc.
- Since the registration did not happen there, we'll abort.
+ Since the registration did not happen there, we'll die.
Therefore, declare a new deregistration entry point that does the
exact same thing, but will resolve to the same library as
struct object *ob = 0;
/* If .eh_frame is empty, we haven't registered. */
- if ((uword *) begin == 0 || *(uword *) begin == 0)
+ if ((const uword *) begin == 0 || *(const uword *) begin == 0)
return ob;
init_object_mutex_once ();
}
}
- __gthread_mutex_unlock (&object_mutex);
- abort ();
-
out:
__gthread_mutex_unlock (&object_mutex);
+ gcc_assert (ob);
return (void *) ob;
}
return (_Unwind_Ptr) ob->tbase;
case DW_EH_PE_datarel:
return (_Unwind_Ptr) ob->dbase;
+ default:
+ gcc_unreachable ();
}
- abort ();
}
/* Return the FDE pointer encoding from the CIE. */
{
const unsigned char *aug, *p;
_Unwind_Ptr dummy;
- _Unwind_Word utmp;
- _Unwind_Sword stmp;
+ _uleb128_t utmp;
+ _sleb128_t stmp;
aug = cie->augmentation;
if (aug[0] != 'z')
return DW_EH_PE_absptr;
- p = aug + strlen (aug) + 1; /* Skip the augmentation string. */
+ p = aug + strlen ((const char *)aug) + 1; /* Skip the augmentation string. */
p = read_uleb128 (p, &utmp); /* Skip code alignment. */
p = read_sleb128 (p, &stmp); /* Skip data alignment. */
- p++; /* Skip return address column. */
+ if (cie->version == 1) /* Skip return address column. */
+ p++;
+ else
+ p = read_uleb128 (p, &utmp);
aug++; /* Skip 'z' */
p = read_uleb128 (p, &utmp); /* Skip augmentation length. */
fde_unencoded_compare (struct object *ob __attribute__((unused)),
const fde *x, const fde *y)
{
- _Unwind_Ptr x_ptr = *(_Unwind_Ptr *) x->pc_begin;
- _Unwind_Ptr y_ptr = *(_Unwind_Ptr *) y->pc_begin;
+ const _Unwind_Ptr x_ptr = *(const _Unwind_Ptr *) x->pc_begin;
+ const _Unwind_Ptr y_ptr = *(const _Unwind_Ptr *) y->pc_begin;
if (x_ptr > y_ptr)
return 1;
{
static const fde *marker;
size_t count = linear->count;
- const fde **chain_end = ▮
+ const fde *const *chain_end = ▮
size_t i, j, k;
/* This should optimize out, but it is wise to make sure this assumption
is correct. Should these have different sizes, we cannot cast between
them and the overlaying onto ERRATIC will not work. */
- if (sizeof (const fde *) != sizeof (const fde **))
- abort ();
+ gcc_assert (sizeof (const fde *) == sizeof (const fde **));
for (i = 0; i < count; i++)
{
- const fde **probe;
+ const fde *const *probe;
for (probe = chain_end;
probe != &marker && fde_compare (ob, linear->array[i], *probe) < 0;
probe = chain_end)
{
- chain_end = (const fde **) erratic->array[probe - linear->array];
+ chain_end = (const fde *const*) erratic->array[probe - linear->array];
erratic->array[probe - linear->array] = NULL;
}
erratic->array[i] = (const fde *) chain_end;
{
fde_compare_t fde_compare;
- if (accu->linear && accu->linear->count != count)
- abort ();
+ gcc_assert (!accu->linear || accu->linear->count == count);
if (ob->s.b.mixed_encoding)
fde_compare = fde_mixed_encoding_compare;
if (accu->erratic)
{
fde_split (ob, fde_compare, accu->linear, accu->erratic);
- if (accu->linear->count + accu->erratic->count != count)
- abort ();
+ gcc_assert (accu->linear->count + accu->erratic->count == count);
frame_heapsort (ob, fde_compare, accu->erratic);
fde_merge (ob, fde_compare, accu->linear, accu->erratic);
free (accu->erratic);
if (encoding == DW_EH_PE_absptr)
{
- if (*(_Unwind_Ptr *) this_fde->pc_begin == 0)
+ if (*(const _Unwind_Ptr *) this_fde->pc_begin == 0)
continue;
}
else
if (encoding == DW_EH_PE_absptr)
{
- pc_begin = ((_Unwind_Ptr *) this_fde->pc_begin)[0];
- pc_range = ((_Unwind_Ptr *) this_fde->pc_begin)[1];
+ pc_begin = ((const _Unwind_Ptr *) this_fde->pc_begin)[0];
+ pc_range = ((const _Unwind_Ptr *) this_fde->pc_begin)[1];
if (pc_begin == 0)
continue;
}
else
{
_Unwind_Ptr mask;
- const char *p;
+ const unsigned char *p;
p = read_encoded_value_with_base (encoding, base,
this_fde->pc_begin, &pc_begin);
for (lo = 0, hi = vec->count; lo < hi; )
{
size_t i = (lo + hi) / 2;
- const fde *f = vec->array[i];
- void *pc_begin;
- uaddr pc_range;
-
- pc_begin = ((void **) f->pc_begin)[0];
- pc_range = ((uaddr *) f->pc_begin)[1];
+ const fde *const f = vec->array[i];
+ const void *pc_begin = ((const void *const*) f->pc_begin)[0];
+ const uaddr pc_range = ((const uaddr *) f->pc_begin)[1];
if (pc < pc_begin)
hi = i;
size_t i = (lo + hi) / 2;
const fde *f = vec->array[i];
_Unwind_Ptr pc_begin, pc_range;
- const char *p;
+ const unsigned char *p;
p = read_encoded_value_with_base (encoding, base, f->pc_begin,
&pc_begin);
size_t i = (lo + hi) / 2;
const fde *f = vec->array[i];
_Unwind_Ptr pc_begin, pc_range;
- const char *p;
+ const unsigned char *p;
int encoding;
encoding = get_fde_encoding (f);
}
else
{
- /* Long slow labourious linear search, cos we've no memory. */
+ /* Long slow laborious linear search, cos we've no memory. */
if (ob->s.b.from_array)
{
fde **p;
if (f)
{
int encoding;
+ _Unwind_Ptr func;
bases->tbase = ob->tbase;
bases->dbase = ob->dbase;
if (ob->s.b.mixed_encoding)
encoding = get_fde_encoding (f);
read_encoded_value_with_base (encoding, base_from_object (encoding, ob),
- f->pc_begin, (_Unwind_Ptr *)&bases->func);
+ f->pc_begin, &func);
+ bases->func = (void *) func;
}
return f;
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