/* This module handles expression trees.
Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
- 2001, 2002, 2003, 2004
+ 2001, 2002, 2003, 2004, 2005
Free Software Foundation, Inc.
Written by Steve Chamberlain of Cygnus Support <sac@cygnus.com>.
-This file is part of GLD, the Gnu Linker.
+ This file is part of GLD, the Gnu Linker.
-GLD is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
+ GLD is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
-GLD is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ GLD is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with GLD; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+ You should have received a copy of the GNU General Public License
+ along with GLD; see the file COPYING. If not, write to the Free
+ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA. */
/* This module is in charge of working out the contents of expressions.
struct exp_data_seg exp_data_seg;
+segment_type *segments;
+
+/* Principally used for diagnostics. */
+static bfd_boolean assigning_to_dot = FALSE;
+
/* Print the string representation of the given token. Surround it
with spaces if INFIX_P is TRUE. */
{ REL, "relocatable" },
{ DATA_SEGMENT_ALIGN, "DATA_SEGMENT_ALIGN" },
{ DATA_SEGMENT_RELRO_END, "DATA_SEGMENT_RELRO_END" },
- { DATA_SEGMENT_END, "DATA_SEGMENT_END" }
+ { DATA_SEGMENT_END, "DATA_SEGMENT_END" },
+ { ORIGIN, "ORIGIN" },
+ { LENGTH, "LENGTH" },
+ { SEGMENT_START, "SEGMENT_START" }
};
unsigned int idx;
new.valid_p = TRUE;
new.section = abs_output_section;
new.value = value;
+ new.str = NULL;
return new;
}
result = exp_fold_tree (tree->binary.lhs, current_section,
allocation_done, dot, dotp);
- if (result.valid_p)
+
+ /* The SEGMENT_START operator is special because its first
+ operand is a string, not the name of a symbol. */
+ if (result.valid_p && tree->type.node_code == SEGMENT_START)
+ {
+ const char *segment_name;
+ segment_type *seg;
+ /* Check to see if the user has overridden the default
+ value. */
+ segment_name = tree->binary.rhs->name.name;
+ for (seg = segments; seg; seg = seg->next)
+ if (strcmp (seg->name, segment_name) == 0)
+ {
+ seg->used = TRUE;
+ result.value = seg->value;
+ result.str = NULL;
+ result.section = NULL;
+ break;
+ }
+ }
+ else if (result.valid_p)
{
etree_value_type other;
case ALIGN_K:
result.value = align_n (result.value, other.value);
break;
-
+
case DATA_SEGMENT_ALIGN:
if (allocation_done != lang_first_phase_enum
&& current_section == abs_output_section
if (allocation_done == lang_allocating_phase_enum)
{
exp_data_seg.phase = exp_dataseg_align_seen;
+ exp_data_seg.min_base = align_n (dot, maxpage);
exp_data_seg.base = result.value;
exp_data_seg.pagesize = other.value;
+ exp_data_seg.maxpagesize = maxpage;
exp_data_seg.relro_end = 0;
}
}
etree_value_type result;
result.valid_p = FALSE;
-
+
switch (tree->type.node_code)
{
case SIZEOF_HEADERS:
}
}
}
- else if (allocation_done == lang_final_phase_enum)
+ else if (allocation_done == lang_final_phase_enum
+ || assigning_to_dot)
einfo (_("%F%S: undefined symbol `%s' referenced in expression\n"),
tree->name.name);
else if (h->type == bfd_link_hash_new)
{
h->type = bfd_link_hash_undefined;
h->u.undef.abfd = NULL;
- if (h->u.undef.next == NULL)
+ if (h->u.undef.next == NULL && h != link_info.hash->undefs_tail)
bfd_link_add_undef (link_info.hash, h);
}
}
}
break;
+ case LENGTH:
+ {
+ lang_memory_region_type *mem;
+
+ mem = lang_memory_region_lookup (tree->name.name, FALSE);
+ if (mem != NULL)
+ result = new_abs (mem->length);
+ else
+ einfo (_("%F%S: undefined MEMORY region `%s' referenced in expression\n"),
+ tree->name.name);
+ }
+ break;
+
+ case ORIGIN:
+ {
+ lang_memory_region_type *mem;
+
+ mem = lang_memory_region_lookup (tree->name.name, FALSE);
+ if (mem != NULL)
+ result = new_abs (mem->origin);
+ else
+ einfo (_("%F%S: undefined MEMORY region `%s' referenced in expression\n"),
+ tree->name.name);
+ }
+ break;
+
default:
FAIL ();
break;
if (tree == NULL)
{
- result.valid_p = FALSE;
+ memset (&result, 0, sizeof (result));
return result;
}
case etree_rel:
if (allocation_done != lang_final_phase_enum)
- result.valid_p = FALSE;
+ memset (&result, 0, sizeof (result));
else
result = new_rel ((tree->rel.value
+ tree->rel.section->output_section->vma
result = exp_fold_tree (tree->assert_s.child,
current_section,
allocation_done, dot, dotp);
- if (result.valid_p)
- {
- if (! result.value)
- einfo ("%F%P: %s\n", tree->assert_s.message);
- return result;
- }
+ if (result.valid_p && !result.value)
+ einfo ("%X%P: %s\n", tree->assert_s.message);
break;
case etree_unary:
|| (allocation_done == lang_final_phase_enum
&& current_section == abs_output_section))
{
+ /* Notify the folder that this is an assignment to dot. */
+ assigning_to_dot = TRUE;
result = exp_fold_tree (tree->assign.src,
current_section,
- allocation_done, dot,
- dotp);
+ allocation_done, dot, dotp);
+ assigning_to_dot = FALSE;
+
if (! result.valid_p)
einfo (_("%F%S invalid assignment to location counter\n"));
else
}
}
}
+ else
+ memset (&result, 0, sizeof (result));
}
else
{
default:
FAIL ();
+ memset (&result, 0, sizeof (result));
break;
}
value.assign.dst = dst;
value.assign.type.node_class = etree_assign;
-#if 0
- if (exp_fold_tree_no_dot (&value, &result))
- return exp_intop (result);
-#endif
new = stat_alloc (sizeof (new->assign));
memcpy (new, &value, sizeof (new->assign));
return new;
minfo ("%s+0x%v", tree->rel.section->name, tree->rel.value);
return;
case etree_assign:
-#if 0
- if (tree->assign.dst->sdefs != NULL)
- fprintf (config.map_file, "%s (%x) ", tree->assign.dst->name,
- tree->assign.dst->sdefs->value);
- else
- fprintf (config.map_file, "%s (UNDEFINED)", tree->assign.dst->name);
-#endif
fprintf (config.map_file, "%s", tree->assign.dst);
exp_print_token (tree->type.node_code, TRUE);
exp_print_tree (tree->assign.src);
fill = xmalloc ((len + 1) / 2 + sizeof (*fill) - 1);
fill->size = (len + 1) / 2;
dst = fill->data;
- s = r.str;
+ s = (unsigned char *) r.str;
val = 0;
do
{
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