/* This module handles expression trees.
Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
- 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
Written by Steve Chamberlain of Cygnus Support <sac@cygnus.com>.
#include "safe-ctype.h"
static void exp_fold_tree_1 (etree_type *);
-static void exp_fold_tree_no_dot (etree_type *);
static bfd_vma align_n (bfd_vma, bfd_vma);
segment_type *segments;
static void
make_abs (void)
{
- expld.result.value += expld.result.section->vma;
+ if (expld.result.section != NULL)
+ expld.result.value += expld.result.section->vma;
expld.result.section = bfd_abs_section_ptr;
}
}
static void
-new_rel (bfd_vma value, char *str, asection *section)
+new_number (bfd_vma value)
{
expld.result.valid_p = TRUE;
expld.result.value = value;
- expld.result.str = str;
+ expld.result.str = NULL;
+ expld.result.section = NULL;
+}
+
+static void
+new_rel (bfd_vma value, asection *section)
+{
+ expld.result.valid_p = TRUE;
+ expld.result.value = value;
+ expld.result.str = NULL;
expld.result.section = section;
}
break;
case '~':
- make_abs ();
expld.result.value = ~expld.result.value;
break;
case '!':
- make_abs ();
expld.result.value = !expld.result.value;
break;
case '-':
- make_abs ();
expld.result.value = -expld.result.value;
break;
{
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)
{
+ if (!seg->used
+ && config.magic_demand_paged
+ && (seg->value % config.maxpagesize) != 0)
+ einfo (_("%P: warning: address of `%s' isn't multiple of maximum page size\n"),
+ segment_name);
seg->used = TRUE;
- expld.result.value = seg->value;
- expld.result.str = NULL;
- expld.result.section = expld.section;
+ new_rel_from_abs (seg->value);
break;
}
return;
if (expld.result.valid_p)
{
- /* If the values are from different sections, or this is an
- absolute expression, make both the source arguments
- absolute. However, adding or subtracting an absolute
- value from a relative value is meaningful, and is an
- exception. */
- if (expld.section != bfd_abs_section_ptr
- && lhs.section == bfd_abs_section_ptr
- && tree->type.node_code == '+')
- {
- /* Keep the section of the rhs term. */
- expld.result.value = lhs.value + expld.result.value;
- return;
- }
- else if (expld.section != bfd_abs_section_ptr
- && expld.result.section == bfd_abs_section_ptr
- && (tree->type.node_code == '+'
- || tree->type.node_code == '-'))
+ if (lhs.section != expld.result.section)
{
- /* Keep the section of the lhs term. */
- expld.result.section = lhs.section;
- }
- else if (expld.result.section != lhs.section
- || expld.section == bfd_abs_section_ptr)
- {
- make_abs ();
- lhs.value += lhs.section->vma;
+ /* If the values are from different sections, and neither is
+ just a number, make both the source arguments absolute. */
+ if (expld.result.section != NULL
+ && lhs.section != NULL)
+ {
+ make_abs ();
+ lhs.value += lhs.section->vma;
+ }
+
+ /* If the rhs is just a number, keep the lhs section. */
+ else if (expld.result.section == NULL)
+ expld.result.section = lhs.section;
}
switch (tree->type.node_code)
break;
#define BOP(x, y) \
- case x: \
- expld.result.value = lhs.value y expld.result.value; \
- break;
+ case x: \
+ expld.result.value = lhs.value y expld.result.value; \
+ break;
+
+#define BOPN(x, y) \
+ case x: \
+ expld.result.value = lhs.value y expld.result.value; \
+ expld.result.section = NULL; \
+ break;
BOP ('+', +);
BOP ('*', *);
BOP ('-', -);
BOP (LSHIFT, <<);
BOP (RSHIFT, >>);
- BOP (EQ, ==);
- BOP (NE, !=);
- BOP ('<', <);
- BOP ('>', >);
- BOP (LE, <=);
- BOP (GE, >=);
BOP ('&', &);
BOP ('^', ^);
BOP ('|', |);
- BOP (ANDAND, &&);
- BOP (OROR, ||);
+ BOPN (EQ, ==);
+ BOPN (NE, !=);
+ BOPN ('<', <);
+ BOPN ('>', >);
+ BOPN (LE, <=);
+ BOPN (GE, >=);
+ BOPN (ANDAND, &&);
+ BOPN (OROR, ||);
case MAX_K:
if (lhs.value > expld.result.value)
The bfd function may cache incorrect data. */
if (expld.phase != lang_mark_phase_enum)
hdr_size = bfd_sizeof_headers (link_info.output_bfd, &link_info);
- new_abs (hdr_size);
+ new_number (hdr_size);
}
break;
case DEFINED:
+ expld.uses_defined = TRUE;
if (expld.phase == lang_first_phase_enum)
lang_track_definedness (tree->name.name);
else
&link_info,
tree->name.name,
FALSE, FALSE, TRUE);
- expld.result.value = (h != NULL
- && (h->type == bfd_link_hash_defined
- || h->type == bfd_link_hash_defweak
- || h->type == bfd_link_hash_common)
- && (def_iteration == lang_statement_iteration
- || def_iteration == -1));
- expld.result.section = expld.section;
- expld.result.valid_p = TRUE;
+ new_number (h != NULL
+ && (h->type == bfd_link_hash_defined
+ || h->type == bfd_link_hash_defweak
+ || h->type == bfd_link_hash_common)
+ && (def_iteration == lang_statement_iteration
+ || def_iteration == -1));
}
break;
else if (h->type == bfd_link_hash_defined
|| h->type == bfd_link_hash_defweak)
{
- if (bfd_is_abs_section (h->u.def.section))
- new_abs (h->u.def.value);
- else
- {
- asection *output_section;
+ asection *output_section;
- output_section = h->u.def.section->output_section;
- if (output_section == NULL)
- {
- if (expld.phase != lang_mark_phase_enum)
- einfo (_("%X%S: unresolvable symbol `%s'"
- " referenced in expression\n"),
- tree->name.name);
- }
- else
- new_rel (h->u.def.value + h->u.def.section->output_offset,
- NULL, output_section);
+ output_section = h->u.def.section->output_section;
+ if (output_section == NULL)
+ {
+ if (expld.phase != lang_mark_phase_enum)
+ einfo (_("%X%S: unresolvable symbol `%s'"
+ " referenced in expression\n"),
+ tree->name.name);
}
+ else if (output_section == bfd_abs_section_ptr
+ && (expld.section != bfd_abs_section_ptr
+ || ld_compatibility >= 221))
+ new_number (h->u.def.value + h->u.def.section->output_offset);
+ else
+ new_rel (h->u.def.value + h->u.def.section->output_offset,
+ output_section);
}
else if (expld.phase == lang_final_phase_enum
|| expld.assigning_to_dot)
tree->name.name);
}
else if (os->processed_vma)
- new_rel (0, NULL, os->bfd_section);
+ new_rel (0, os->bfd_section);
}
break;
if (expld.phase == lang_final_phase_enum)
einfo (_("%F%S: undefined section `%s' referenced in expression\n"),
tree->name.name);
- new_abs (0);
+ new_number (0);
}
else if (os->processed_vma)
{
else
val = (bfd_vma)1 << os->bfd_section->alignment_power;
- new_abs (val);
+ new_number (val);
}
}
break;
mem = lang_memory_region_lookup (tree->name.name, FALSE);
if (mem != NULL)
- new_abs (mem->length);
+ new_number (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;
+ if (expld.phase != lang_first_phase_enum)
+ {
+ lang_memory_region_type *mem;
- mem = lang_memory_region_lookup (tree->name.name, FALSE);
- if (mem != NULL)
- new_abs (mem->origin);
- else
- einfo (_("%F%S: undefined MEMORY region `%s'"
- " referenced in expression\n"), tree->name.name);
- }
+ mem = lang_memory_region_lookup (tree->name.name, FALSE);
+ if (mem != NULL)
+ new_rel_from_abs (mem->origin);
+ else
+ einfo (_("%F%S: undefined MEMORY region `%s'"
+ " referenced in expression\n"), tree->name.name);
+ }
break;
case CONSTANT:
if (strcmp (tree->name.name, "MAXPAGESIZE") == 0)
- new_abs (bfd_emul_get_maxpagesize (default_target));
+ new_number (config.maxpagesize);
else if (strcmp (tree->name.name, "COMMONPAGESIZE") == 0)
- new_abs (bfd_emul_get_commonpagesize (default_target));
+ new_number (config.commonpagesize);
else
einfo (_("%F%S: unknown constant `%s' referenced in expression\n"),
tree->name.name);
switch (tree->type.node_class)
{
case etree_value:
- new_rel (tree->value.value, tree->value.str, expld.section);
+ if (expld.section == bfd_abs_section_ptr
+ && ld_compatibility < 221)
+ new_abs (tree->value.value);
+ else
+ new_number (tree->value.value);
+ expld.result.str = tree->value.str;
break;
case etree_rel:
{
asection *output_section = tree->rel.section->output_section;
new_rel (tree->rel.value + tree->rel.section->output_offset,
- NULL, output_section);
+ output_section);
}
else
memset (&expld.result, 0, sizeof (expld.result));
{
bfd_vma nextdot;
- nextdot = expld.result.value + expld.section->vma;
+ nextdot = expld.result.value;
+ if (expld.result.section != NULL)
+ nextdot += expld.result.section->vma;
+ else
+ nextdot += expld.section->vma;
if (nextdot < expld.dot
&& expld.section != bfd_abs_section_ptr)
einfo (_("%F%S cannot move location counter backwards"
}
exp_fold_tree_1 (tree->assign.src);
- if (expld.result.valid_p)
+ if (expld.result.valid_p
+ || (expld.phase == lang_first_phase_enum
+ && !expld.uses_defined))
{
if (h == NULL)
{
lang_update_definedness (tree->assign.dst, h);
h->type = bfd_link_hash_defined;
h->u.def.value = expld.result.value;
+ if (expld.result.section == NULL)
+ expld.result.section = expld.section;
h->u.def.section = expld.result.section;
if (tree->type.node_class == etree_provide)
tree->type.node_class = etree_provided;
+
+ /* Copy the symbol type if this is a simple assignment of
+ one symbol to annother. */
+ if (tree->assign.src->type.node_class == etree_name)
+ {
+ struct bfd_link_hash_entry *hsrc;
+
+ hsrc = bfd_link_hash_lookup (link_info.hash,
+ tree->assign.src->name.name,
+ FALSE, FALSE, TRUE);
+ if (hsrc)
+ bfd_copy_link_hash_symbol_type (link_info.output_bfd, h,
+ hsrc);
+ }
+ }
+ else if (expld.phase == lang_final_phase_enum)
+ {
+ h = bfd_link_hash_lookup (link_info.hash, tree->assign.dst,
+ FALSE, FALSE, TRUE);
+ if (h != NULL
+ && h->type == bfd_link_hash_new)
+ h->type = bfd_link_hash_undefined;
}
}
break;
expld.dot = *dotp;
expld.dotp = dotp;
expld.section = current_section;
+ expld.uses_defined = FALSE;
exp_fold_tree_1 (tree);
}
-static void
+void
exp_fold_tree_no_dot (etree_type *tree)
{
expld.dot = 0;
expld.dotp = NULL;
expld.section = bfd_abs_section_ptr;
+ expld.uses_defined = FALSE;
exp_fold_tree_1 (tree);
}
{
etree_type *n;
- n = stat_alloc (sizeof (n->assign));
+ n = (etree_type *) stat_alloc (sizeof (n->assign));
n->assign.type.node_code = '=';
n->assign.type.lineno = src->type.lineno;
n->assign.type.node_class = etree_provide;
{
etree_type *n;
- n = stat_alloc (sizeof (n->assert_s));
+ n = (etree_type *) stat_alloc (sizeof (n->assert_s));
n->assert_s.type.node_code = '!';
n->assert_s.type.lineno = exp->type.lineno;
n->assert_s.type.node_class = etree_assert;
void
exp_print_tree (etree_type *tree)
{
+ bfd_boolean function_like;
+
if (config.map_file == NULL)
config.map_file = stderr;
minfo ("%s+0x%v", tree->rel.section->name, tree->rel.value);
return;
case etree_assign:
- fprintf (config.map_file, "%s", tree->assign.dst);
+ fputs (tree->assign.dst, config.map_file);
exp_print_token (tree->type.node_code, TRUE);
exp_print_tree (tree->assign.src);
break;
case etree_provided:
fprintf (config.map_file, "PROVIDE (%s, ", tree->assign.dst);
exp_print_tree (tree->assign.src);
- fprintf (config.map_file, ")");
+ fputc (')', config.map_file);
break;
case etree_binary:
- fprintf (config.map_file, "(");
+ function_like = FALSE;
+ switch (tree->type.node_code)
+ {
+ case MAX_K:
+ case MIN_K:
+ case ALIGN_K:
+ case DATA_SEGMENT_ALIGN:
+ case DATA_SEGMENT_RELRO_END:
+ function_like = TRUE;
+ }
+ if (function_like)
+ {
+ exp_print_token (tree->type.node_code, FALSE);
+ fputc (' ', config.map_file);
+ }
+ fputc ('(', config.map_file);
exp_print_tree (tree->binary.lhs);
- exp_print_token (tree->type.node_code, TRUE);
+ if (function_like)
+ fprintf (config.map_file, ", ");
+ else
+ exp_print_token (tree->type.node_code, TRUE);
exp_print_tree (tree->binary.rhs);
- fprintf (config.map_file, ")");
+ fputc (')', config.map_file);
break;
case etree_trinary:
exp_print_tree (tree->trinary.cond);
- fprintf (config.map_file, "?");
+ fputc ('?', config.map_file);
exp_print_tree (tree->trinary.lhs);
- fprintf (config.map_file, ":");
+ fputc (':', config.map_file);
exp_print_tree (tree->trinary.rhs);
break;
case etree_unary:
{
fprintf (config.map_file, " (");
exp_print_tree (tree->unary.child);
- fprintf (config.map_file, ")");
+ fputc (')', config.map_file);
}
break;
case etree_name:
if (tree->type.node_code == NAME)
- {
- fprintf (config.map_file, "%s", tree->name.name);
- }
+ fputs (tree->name.name, config.map_file);
else
{
exp_print_token (tree->type.node_code, FALSE);
{
unsigned char *dst;
unsigned char *s;
- fill = xmalloc ((len + 1) / 2 + sizeof (*fill) - 1);
+ fill = (fill_type *) xmalloc ((len + 1) / 2 + sizeof (*fill) - 1);
fill->size = (len + 1) / 2;
dst = fill->data;
s = (unsigned char *) expld.result.str;
}
else
{
- fill = xmalloc (4 + sizeof (*fill) - 1);
+ fill = (fill_type *) xmalloc (4 + sizeof (*fill) - 1);
val = expld.result.value;
fill->data[0] = (val >> 24) & 0xff;
fill->data[1] = (val >> 16) & 0xff;
if (expld.result.valid_p)
{
- expld.result.value += expld.result.section->vma;
+ if (expld.result.section != NULL)
+ expld.result.value += expld.result.section->vma;
return expld.result.value;
}
else if (name != NULL && expld.phase != lang_mark_phase_enum)