1143 lines
28 KiB
C
1143 lines
28 KiB
C
/* This module handles expression trees.
|
|
Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
|
|
2001, 2002, 2003, 2004, 2005, 2006, 2007
|
|
Free Software Foundation, Inc.
|
|
Written by Steve Chamberlain of Cygnus Support <sac@cygnus.com>.
|
|
|
|
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 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, 51 Franklin Street - Fifth Floor, Boston, MA
|
|
02110-1301, USA. */
|
|
|
|
/* This module is in charge of working out the contents of expressions.
|
|
|
|
It has to keep track of the relative/absness of a symbol etc. This
|
|
is done by keeping all values in a struct (an etree_value_type)
|
|
which contains a value, a section to which it is relative and a
|
|
valid bit. */
|
|
|
|
#include "sysdep.h"
|
|
#include "bfd.h"
|
|
#include "bfdlink.h"
|
|
|
|
#include "ld.h"
|
|
#include "ldmain.h"
|
|
#include "ldmisc.h"
|
|
#include "ldexp.h"
|
|
#include "ldlex.h"
|
|
#include <ldgram.h>
|
|
#include "ldlang.h"
|
|
#include "libiberty.h"
|
|
#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;
|
|
|
|
struct ldexp_control expld;
|
|
|
|
/* Print the string representation of the given token. Surround it
|
|
with spaces if INFIX_P is TRUE. */
|
|
|
|
static void
|
|
exp_print_token (token_code_type code, int infix_p)
|
|
{
|
|
static const struct
|
|
{
|
|
token_code_type code;
|
|
char * name;
|
|
}
|
|
table[] =
|
|
{
|
|
{ INT, "int" },
|
|
{ NAME, "NAME" },
|
|
{ PLUSEQ, "+=" },
|
|
{ MINUSEQ, "-=" },
|
|
{ MULTEQ, "*=" },
|
|
{ DIVEQ, "/=" },
|
|
{ LSHIFTEQ, "<<=" },
|
|
{ RSHIFTEQ, ">>=" },
|
|
{ ANDEQ, "&=" },
|
|
{ OREQ, "|=" },
|
|
{ OROR, "||" },
|
|
{ ANDAND, "&&" },
|
|
{ EQ, "==" },
|
|
{ NE, "!=" },
|
|
{ LE, "<=" },
|
|
{ GE, ">=" },
|
|
{ LSHIFT, "<<" },
|
|
{ RSHIFT, ">>" },
|
|
{ ALIGN_K, "ALIGN" },
|
|
{ BLOCK, "BLOCK" },
|
|
{ QUAD, "QUAD" },
|
|
{ SQUAD, "SQUAD" },
|
|
{ LONG, "LONG" },
|
|
{ SHORT, "SHORT" },
|
|
{ BYTE, "BYTE" },
|
|
{ SECTIONS, "SECTIONS" },
|
|
{ SIZEOF_HEADERS, "SIZEOF_HEADERS" },
|
|
{ MEMORY, "MEMORY" },
|
|
{ DEFINED, "DEFINED" },
|
|
{ TARGET_K, "TARGET" },
|
|
{ SEARCH_DIR, "SEARCH_DIR" },
|
|
{ MAP, "MAP" },
|
|
{ ENTRY, "ENTRY" },
|
|
{ NEXT, "NEXT" },
|
|
{ SIZEOF, "SIZEOF" },
|
|
{ ADDR, "ADDR" },
|
|
{ LOADADDR, "LOADADDR" },
|
|
{ CONSTANT, "CONSTANT" },
|
|
{ MAX_K, "MAX_K" },
|
|
{ REL, "relocatable" },
|
|
{ DATA_SEGMENT_ALIGN, "DATA_SEGMENT_ALIGN" },
|
|
{ DATA_SEGMENT_RELRO_END, "DATA_SEGMENT_RELRO_END" },
|
|
{ DATA_SEGMENT_END, "DATA_SEGMENT_END" },
|
|
{ ORIGIN, "ORIGIN" },
|
|
{ LENGTH, "LENGTH" },
|
|
{ SEGMENT_START, "SEGMENT_START" }
|
|
};
|
|
unsigned int idx;
|
|
|
|
for (idx = 0; idx < ARRAY_SIZE (table); idx++)
|
|
if (table[idx].code == code)
|
|
break;
|
|
|
|
if (infix_p)
|
|
fputc (' ', config.map_file);
|
|
|
|
if (idx < ARRAY_SIZE (table))
|
|
fputs (table[idx].name, config.map_file);
|
|
else if (code < 127)
|
|
fputc (code, config.map_file);
|
|
else
|
|
fprintf (config.map_file, "<code %d>", code);
|
|
|
|
if (infix_p)
|
|
fputc (' ', config.map_file);
|
|
}
|
|
|
|
static void
|
|
make_abs (void)
|
|
{
|
|
expld.result.value += expld.result.section->vma;
|
|
expld.result.section = bfd_abs_section_ptr;
|
|
}
|
|
|
|
static void
|
|
new_abs (bfd_vma value)
|
|
{
|
|
expld.result.valid_p = TRUE;
|
|
expld.result.section = bfd_abs_section_ptr;
|
|
expld.result.value = value;
|
|
expld.result.str = NULL;
|
|
}
|
|
|
|
etree_type *
|
|
exp_intop (bfd_vma value)
|
|
{
|
|
etree_type *new = stat_alloc (sizeof (new->value));
|
|
new->type.node_code = INT;
|
|
new->type.lineno = lineno;
|
|
new->value.value = value;
|
|
new->value.str = NULL;
|
|
new->type.node_class = etree_value;
|
|
return new;
|
|
}
|
|
|
|
etree_type *
|
|
exp_bigintop (bfd_vma value, char *str)
|
|
{
|
|
etree_type *new = stat_alloc (sizeof (new->value));
|
|
new->type.node_code = INT;
|
|
new->type.lineno = lineno;
|
|
new->value.value = value;
|
|
new->value.str = str;
|
|
new->type.node_class = etree_value;
|
|
return new;
|
|
}
|
|
|
|
/* Build an expression representing an unnamed relocatable value. */
|
|
|
|
etree_type *
|
|
exp_relop (asection *section, bfd_vma value)
|
|
{
|
|
etree_type *new = stat_alloc (sizeof (new->rel));
|
|
new->type.node_code = REL;
|
|
new->type.lineno = lineno;
|
|
new->type.node_class = etree_rel;
|
|
new->rel.section = section;
|
|
new->rel.value = value;
|
|
return new;
|
|
}
|
|
|
|
static void
|
|
new_rel (bfd_vma value, char *str, asection *section)
|
|
{
|
|
expld.result.valid_p = TRUE;
|
|
expld.result.value = value;
|
|
expld.result.str = str;
|
|
expld.result.section = section;
|
|
}
|
|
|
|
static void
|
|
new_rel_from_abs (bfd_vma value)
|
|
{
|
|
expld.result.valid_p = TRUE;
|
|
expld.result.value = value - expld.section->vma;
|
|
expld.result.str = NULL;
|
|
expld.result.section = expld.section;
|
|
}
|
|
|
|
static void
|
|
fold_unary (etree_type *tree)
|
|
{
|
|
exp_fold_tree_1 (tree->unary.child);
|
|
if (expld.result.valid_p)
|
|
{
|
|
switch (tree->type.node_code)
|
|
{
|
|
case ALIGN_K:
|
|
if (expld.phase != lang_first_phase_enum)
|
|
new_rel_from_abs (align_n (expld.dot, expld.result.value));
|
|
else
|
|
expld.result.valid_p = FALSE;
|
|
break;
|
|
|
|
case ABSOLUTE:
|
|
make_abs ();
|
|
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;
|
|
|
|
case NEXT:
|
|
/* Return next place aligned to value. */
|
|
if (expld.phase != lang_first_phase_enum)
|
|
{
|
|
make_abs ();
|
|
expld.result.value = align_n (expld.dot, expld.result.value);
|
|
}
|
|
else
|
|
expld.result.valid_p = FALSE;
|
|
break;
|
|
|
|
case DATA_SEGMENT_END:
|
|
if (expld.phase != lang_first_phase_enum
|
|
&& expld.section == bfd_abs_section_ptr
|
|
&& (expld.dataseg.phase == exp_dataseg_align_seen
|
|
|| expld.dataseg.phase == exp_dataseg_relro_seen
|
|
|| expld.dataseg.phase == exp_dataseg_adjust
|
|
|| expld.dataseg.phase == exp_dataseg_relro_adjust
|
|
|| expld.phase == lang_final_phase_enum))
|
|
{
|
|
if (expld.dataseg.phase == exp_dataseg_align_seen
|
|
|| expld.dataseg.phase == exp_dataseg_relro_seen)
|
|
{
|
|
expld.dataseg.phase = exp_dataseg_end_seen;
|
|
expld.dataseg.end = expld.result.value;
|
|
}
|
|
}
|
|
else
|
|
expld.result.valid_p = FALSE;
|
|
break;
|
|
|
|
default:
|
|
FAIL ();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
fold_binary (etree_type *tree)
|
|
{
|
|
exp_fold_tree_1 (tree->binary.lhs);
|
|
|
|
/* The SEGMENT_START operator is special because its first
|
|
operand is a string, not the name of a symbol. */
|
|
if (expld.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;
|
|
expld.result.value = seg->value;
|
|
expld.result.str = NULL;
|
|
expld.result.section = NULL;
|
|
break;
|
|
}
|
|
}
|
|
else if (expld.result.valid_p)
|
|
{
|
|
etree_value_type lhs = expld.result;
|
|
|
|
exp_fold_tree_1 (tree->binary.rhs);
|
|
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 == '-'))
|
|
{
|
|
/* 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;
|
|
}
|
|
|
|
switch (tree->type.node_code)
|
|
{
|
|
case '%':
|
|
if (expld.result.value != 0)
|
|
expld.result.value = ((bfd_signed_vma) lhs.value
|
|
% (bfd_signed_vma) expld.result.value);
|
|
else if (expld.phase != lang_mark_phase_enum)
|
|
einfo (_("%F%S %% by zero\n"));
|
|
break;
|
|
|
|
case '/':
|
|
if (expld.result.value != 0)
|
|
expld.result.value = ((bfd_signed_vma) lhs.value
|
|
/ (bfd_signed_vma) expld.result.value);
|
|
else if (expld.phase != lang_mark_phase_enum)
|
|
einfo (_("%F%S / by zero\n"));
|
|
break;
|
|
|
|
#define BOP(x, y) \
|
|
case x: \
|
|
expld.result.value = lhs.value y expld.result.value; \
|
|
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, ||);
|
|
|
|
case MAX_K:
|
|
if (lhs.value > expld.result.value)
|
|
expld.result.value = lhs.value;
|
|
break;
|
|
|
|
case MIN_K:
|
|
if (lhs.value < expld.result.value)
|
|
expld.result.value = lhs.value;
|
|
break;
|
|
|
|
case ALIGN_K:
|
|
expld.result.value = align_n (lhs.value, expld.result.value);
|
|
break;
|
|
|
|
case DATA_SEGMENT_ALIGN:
|
|
if (expld.phase != lang_first_phase_enum
|
|
&& expld.section == bfd_abs_section_ptr
|
|
&& (expld.dataseg.phase == exp_dataseg_none
|
|
|| expld.dataseg.phase == exp_dataseg_adjust
|
|
|| expld.dataseg.phase == exp_dataseg_relro_adjust
|
|
|| expld.phase == lang_final_phase_enum))
|
|
{
|
|
bfd_vma maxpage = lhs.value;
|
|
bfd_vma commonpage = expld.result.value;
|
|
|
|
expld.result.value = align_n (expld.dot, maxpage);
|
|
if (expld.dataseg.phase == exp_dataseg_relro_adjust)
|
|
expld.result.value = expld.dataseg.base;
|
|
else if (expld.dataseg.phase != exp_dataseg_adjust)
|
|
{
|
|
expld.result.value += expld.dot & (maxpage - 1);
|
|
if (expld.phase == lang_allocating_phase_enum)
|
|
{
|
|
expld.dataseg.phase = exp_dataseg_align_seen;
|
|
expld.dataseg.min_base = align_n (expld.dot, maxpage);
|
|
expld.dataseg.base = expld.result.value;
|
|
expld.dataseg.pagesize = commonpage;
|
|
expld.dataseg.maxpagesize = maxpage;
|
|
expld.dataseg.relro_end = 0;
|
|
}
|
|
}
|
|
else if (commonpage < maxpage)
|
|
expld.result.value += ((expld.dot + commonpage - 1)
|
|
& (maxpage - commonpage));
|
|
}
|
|
else
|
|
expld.result.valid_p = FALSE;
|
|
break;
|
|
|
|
case DATA_SEGMENT_RELRO_END:
|
|
if (expld.phase != lang_first_phase_enum
|
|
&& (expld.dataseg.phase == exp_dataseg_align_seen
|
|
|| expld.dataseg.phase == exp_dataseg_adjust
|
|
|| expld.dataseg.phase == exp_dataseg_relro_adjust
|
|
|| expld.phase == lang_final_phase_enum))
|
|
{
|
|
if (expld.dataseg.phase == exp_dataseg_align_seen
|
|
|| expld.dataseg.phase == exp_dataseg_relro_adjust)
|
|
expld.dataseg.relro_end = lhs.value + expld.result.value;
|
|
|
|
if (expld.dataseg.phase == exp_dataseg_relro_adjust
|
|
&& (expld.dataseg.relro_end
|
|
& (expld.dataseg.pagesize - 1)))
|
|
{
|
|
expld.dataseg.relro_end += expld.dataseg.pagesize - 1;
|
|
expld.dataseg.relro_end &= ~(expld.dataseg.pagesize - 1);
|
|
expld.result.value = (expld.dataseg.relro_end
|
|
- expld.result.value);
|
|
}
|
|
else
|
|
expld.result.value = lhs.value;
|
|
|
|
if (expld.dataseg.phase == exp_dataseg_align_seen)
|
|
expld.dataseg.phase = exp_dataseg_relro_seen;
|
|
}
|
|
else
|
|
expld.result.valid_p = FALSE;
|
|
break;
|
|
|
|
default:
|
|
FAIL ();
|
|
}
|
|
}
|
|
else
|
|
expld.result.valid_p = FALSE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
fold_trinary (etree_type *tree)
|
|
{
|
|
exp_fold_tree_1 (tree->trinary.cond);
|
|
if (expld.result.valid_p)
|
|
exp_fold_tree_1 (expld.result.value
|
|
? tree->trinary.lhs
|
|
: tree->trinary.rhs);
|
|
}
|
|
|
|
static void
|
|
fold_name (etree_type *tree)
|
|
{
|
|
memset (&expld.result, 0, sizeof (expld.result));
|
|
|
|
switch (tree->type.node_code)
|
|
{
|
|
case SIZEOF_HEADERS:
|
|
if (expld.phase != lang_first_phase_enum)
|
|
{
|
|
bfd_vma hdr_size = 0;
|
|
/* Don't find the real header size if only marking sections;
|
|
The bfd function may cache incorrect data. */
|
|
if (expld.phase != lang_mark_phase_enum)
|
|
hdr_size = bfd_sizeof_headers (output_bfd, &link_info);
|
|
new_abs (hdr_size);
|
|
}
|
|
break;
|
|
|
|
case DEFINED:
|
|
if (expld.phase == lang_first_phase_enum)
|
|
lang_track_definedness (tree->name.name);
|
|
else
|
|
{
|
|
struct bfd_link_hash_entry *h;
|
|
int def_iteration
|
|
= lang_symbol_definition_iteration (tree->name.name);
|
|
|
|
h = bfd_wrapped_link_hash_lookup (output_bfd, &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 = bfd_abs_section_ptr;
|
|
expld.result.valid_p = TRUE;
|
|
}
|
|
break;
|
|
|
|
case NAME:
|
|
if (expld.phase == lang_first_phase_enum)
|
|
;
|
|
else if (tree->name.name[0] == '.' && tree->name.name[1] == 0)
|
|
new_rel_from_abs (expld.dot);
|
|
else
|
|
{
|
|
struct bfd_link_hash_entry *h;
|
|
|
|
h = bfd_wrapped_link_hash_lookup (output_bfd, &link_info,
|
|
tree->name.name,
|
|
TRUE, FALSE, TRUE);
|
|
if (!h)
|
|
einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
|
|
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;
|
|
|
|
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);
|
|
}
|
|
}
|
|
else if (expld.phase == lang_final_phase_enum
|
|
|| expld.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 && h != link_info.hash->undefs_tail)
|
|
bfd_link_add_undef (link_info.hash, h);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case ADDR:
|
|
if (expld.phase != lang_first_phase_enum)
|
|
{
|
|
lang_output_section_statement_type *os;
|
|
|
|
os = lang_output_section_find (tree->name.name);
|
|
if (os == NULL)
|
|
{
|
|
if (expld.phase == lang_final_phase_enum)
|
|
einfo (_("%F%S: undefined section `%s' referenced in expression\n"),
|
|
tree->name.name);
|
|
}
|
|
else if (os->processed_vma)
|
|
new_rel (0, NULL, os->bfd_section);
|
|
}
|
|
break;
|
|
|
|
case LOADADDR:
|
|
if (expld.phase != lang_first_phase_enum)
|
|
{
|
|
lang_output_section_statement_type *os;
|
|
|
|
os = lang_output_section_find (tree->name.name);
|
|
if (os == NULL)
|
|
{
|
|
if (expld.phase == lang_final_phase_enum)
|
|
einfo (_("%F%S: undefined section `%s' referenced in expression\n"),
|
|
tree->name.name);
|
|
}
|
|
else if (os->processed_lma)
|
|
{
|
|
if (os->load_base == NULL)
|
|
new_abs (os->bfd_section->lma);
|
|
else
|
|
{
|
|
exp_fold_tree_1 (os->load_base);
|
|
make_abs ();
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case SIZEOF:
|
|
if (expld.phase != lang_first_phase_enum)
|
|
{
|
|
int opb = bfd_octets_per_byte (output_bfd);
|
|
lang_output_section_statement_type *os;
|
|
|
|
os = lang_output_section_find (tree->name.name);
|
|
if (os == NULL)
|
|
{
|
|
if (expld.phase == lang_final_phase_enum)
|
|
einfo (_("%F%S: undefined section `%s' referenced in expression\n"),
|
|
tree->name.name);
|
|
new_abs (0);
|
|
}
|
|
else if (os->processed_vma)
|
|
new_abs (os->bfd_section->size / opb);
|
|
}
|
|
break;
|
|
|
|
case LENGTH:
|
|
{
|
|
lang_memory_region_type *mem;
|
|
|
|
mem = lang_memory_region_lookup (tree->name.name, FALSE);
|
|
if (mem != NULL)
|
|
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)
|
|
new_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));
|
|
else if (strcmp (tree->name.name, "COMMONPAGESIZE") == 0)
|
|
new_abs (bfd_emul_get_commonpagesize (default_target));
|
|
else
|
|
einfo (_("%F%S: unknown constant `%s' referenced in expression\n"),
|
|
tree->name.name);
|
|
break;
|
|
|
|
default:
|
|
FAIL ();
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
exp_fold_tree_1 (etree_type *tree)
|
|
{
|
|
if (tree == NULL)
|
|
{
|
|
memset (&expld.result, 0, sizeof (expld.result));
|
|
return;
|
|
}
|
|
|
|
switch (tree->type.node_class)
|
|
{
|
|
case etree_value:
|
|
new_rel (tree->value.value, tree->value.str, expld.section);
|
|
break;
|
|
|
|
case etree_rel:
|
|
if (expld.phase != lang_first_phase_enum)
|
|
{
|
|
asection *output_section = tree->rel.section->output_section;
|
|
new_rel (tree->rel.value + tree->rel.section->output_offset,
|
|
NULL, output_section);
|
|
}
|
|
else
|
|
memset (&expld.result, 0, sizeof (expld.result));
|
|
break;
|
|
|
|
case etree_assert:
|
|
exp_fold_tree_1 (tree->assert_s.child);
|
|
if (expld.phase == lang_final_phase_enum && !expld.result.value)
|
|
einfo ("%X%P: %s\n", tree->assert_s.message);
|
|
break;
|
|
|
|
case etree_unary:
|
|
fold_unary (tree);
|
|
break;
|
|
|
|
case etree_binary:
|
|
fold_binary (tree);
|
|
break;
|
|
|
|
case etree_trinary:
|
|
fold_trinary (tree);
|
|
break;
|
|
|
|
case etree_assign:
|
|
case etree_provide:
|
|
case etree_provided:
|
|
if (tree->assign.dst[0] == '.' && tree->assign.dst[1] == 0)
|
|
{
|
|
/* Assignment to dot can only be done during allocation. */
|
|
if (tree->type.node_class != etree_assign)
|
|
einfo (_("%F%S can not PROVIDE assignment to location counter\n"));
|
|
if (expld.phase == lang_mark_phase_enum
|
|
|| expld.phase == lang_allocating_phase_enum
|
|
|| (expld.phase == lang_final_phase_enum
|
|
&& expld.section == bfd_abs_section_ptr))
|
|
{
|
|
/* Notify the folder that this is an assignment to dot. */
|
|
expld.assigning_to_dot = TRUE;
|
|
exp_fold_tree_1 (tree->assign.src);
|
|
expld.assigning_to_dot = FALSE;
|
|
|
|
if (!expld.result.valid_p)
|
|
{
|
|
if (expld.phase != lang_mark_phase_enum)
|
|
einfo (_("%F%S invalid assignment to location counter\n"));
|
|
}
|
|
else if (expld.dotp == NULL)
|
|
einfo (_("%F%S assignment to location counter"
|
|
" invalid outside of SECTION\n"));
|
|
else
|
|
{
|
|
bfd_vma nextdot;
|
|
|
|
nextdot = expld.result.value + expld.section->vma;
|
|
if (nextdot < expld.dot
|
|
&& expld.section != bfd_abs_section_ptr)
|
|
einfo (_("%F%S cannot move location counter backwards"
|
|
" (from %V to %V)\n"), expld.dot, nextdot);
|
|
else
|
|
{
|
|
expld.dot = nextdot;
|
|
*expld.dotp = nextdot;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
memset (&expld.result, 0, sizeof (expld.result));
|
|
}
|
|
else
|
|
{
|
|
struct bfd_link_hash_entry *h = NULL;
|
|
|
|
if (tree->type.node_class == etree_provide)
|
|
{
|
|
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
|
|
&& h->type != bfd_link_hash_common))
|
|
{
|
|
/* Do nothing. The symbol was never referenced, or was
|
|
defined by some object. */
|
|
break;
|
|
}
|
|
}
|
|
|
|
exp_fold_tree_1 (tree->assign.src);
|
|
if (expld.result.valid_p)
|
|
{
|
|
if (h == NULL)
|
|
{
|
|
h = bfd_link_hash_lookup (link_info.hash, tree->assign.dst,
|
|
TRUE, FALSE, TRUE);
|
|
if (h == NULL)
|
|
einfo (_("%P%F:%s: hash creation failed\n"),
|
|
tree->assign.dst);
|
|
}
|
|
|
|
/* FIXME: Should we worry if the symbol is already
|
|
defined? */
|
|
lang_update_definedness (tree->assign.dst, h);
|
|
h->type = bfd_link_hash_defined;
|
|
h->u.def.value = expld.result.value;
|
|
h->u.def.section = expld.result.section;
|
|
if (tree->type.node_class == etree_provide)
|
|
tree->type.node_class = etree_provided;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case etree_name:
|
|
fold_name (tree);
|
|
break;
|
|
|
|
default:
|
|
FAIL ();
|
|
memset (&expld.result, 0, sizeof (expld.result));
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
exp_fold_tree (etree_type *tree, asection *current_section, bfd_vma *dotp)
|
|
{
|
|
expld.dot = *dotp;
|
|
expld.dotp = dotp;
|
|
expld.section = current_section;
|
|
exp_fold_tree_1 (tree);
|
|
}
|
|
|
|
static void
|
|
exp_fold_tree_no_dot (etree_type *tree)
|
|
{
|
|
expld.dot = 0;
|
|
expld.dotp = NULL;
|
|
expld.section = bfd_abs_section_ptr;
|
|
exp_fold_tree_1 (tree);
|
|
}
|
|
|
|
etree_type *
|
|
exp_binop (int code, etree_type *lhs, etree_type *rhs)
|
|
{
|
|
etree_type value, *new;
|
|
|
|
value.type.node_code = code;
|
|
value.type.lineno = lhs->type.lineno;
|
|
value.binary.lhs = lhs;
|
|
value.binary.rhs = rhs;
|
|
value.type.node_class = etree_binary;
|
|
exp_fold_tree_no_dot (&value);
|
|
if (expld.result.valid_p)
|
|
return exp_intop (expld.result.value);
|
|
|
|
new = stat_alloc (sizeof (new->binary));
|
|
memcpy (new, &value, sizeof (new->binary));
|
|
return new;
|
|
}
|
|
|
|
etree_type *
|
|
exp_trinop (int code, etree_type *cond, etree_type *lhs, etree_type *rhs)
|
|
{
|
|
etree_type value, *new;
|
|
|
|
value.type.node_code = code;
|
|
value.type.lineno = lhs->type.lineno;
|
|
value.trinary.lhs = lhs;
|
|
value.trinary.cond = cond;
|
|
value.trinary.rhs = rhs;
|
|
value.type.node_class = etree_trinary;
|
|
exp_fold_tree_no_dot (&value);
|
|
if (expld.result.valid_p)
|
|
return exp_intop (expld.result.value);
|
|
|
|
new = stat_alloc (sizeof (new->trinary));
|
|
memcpy (new, &value, sizeof (new->trinary));
|
|
return new;
|
|
}
|
|
|
|
etree_type *
|
|
exp_unop (int code, etree_type *child)
|
|
{
|
|
etree_type value, *new;
|
|
|
|
value.unary.type.node_code = code;
|
|
value.unary.type.lineno = child->type.lineno;
|
|
value.unary.child = child;
|
|
value.unary.type.node_class = etree_unary;
|
|
exp_fold_tree_no_dot (&value);
|
|
if (expld.result.valid_p)
|
|
return exp_intop (expld.result.value);
|
|
|
|
new = stat_alloc (sizeof (new->unary));
|
|
memcpy (new, &value, sizeof (new->unary));
|
|
return new;
|
|
}
|
|
|
|
etree_type *
|
|
exp_nameop (int code, const char *name)
|
|
{
|
|
etree_type value, *new;
|
|
|
|
value.name.type.node_code = code;
|
|
value.name.type.lineno = lineno;
|
|
value.name.name = name;
|
|
value.name.type.node_class = etree_name;
|
|
|
|
exp_fold_tree_no_dot (&value);
|
|
if (expld.result.valid_p)
|
|
return exp_intop (expld.result.value);
|
|
|
|
new = stat_alloc (sizeof (new->name));
|
|
memcpy (new, &value, sizeof (new->name));
|
|
return new;
|
|
|
|
}
|
|
|
|
etree_type *
|
|
exp_assop (int code, const char *dst, etree_type *src)
|
|
{
|
|
etree_type *new;
|
|
|
|
new = stat_alloc (sizeof (new->assign));
|
|
new->type.node_code = code;
|
|
new->type.lineno = src->type.lineno;
|
|
new->type.node_class = etree_assign;
|
|
new->assign.src = src;
|
|
new->assign.dst = dst;
|
|
return new;
|
|
}
|
|
|
|
/* Handle PROVIDE. */
|
|
|
|
etree_type *
|
|
exp_provide (const char *dst, etree_type *src, bfd_boolean hidden)
|
|
{
|
|
etree_type *n;
|
|
|
|
n = stat_alloc (sizeof (n->assign));
|
|
n->assign.type.node_code = '=';
|
|
n->assign.type.lineno = src->type.lineno;
|
|
n->assign.type.node_class = etree_provide;
|
|
n->assign.src = src;
|
|
n->assign.dst = dst;
|
|
n->assign.hidden = hidden;
|
|
return n;
|
|
}
|
|
|
|
/* Handle ASSERT. */
|
|
|
|
etree_type *
|
|
exp_assert (etree_type *exp, const char *message)
|
|
{
|
|
etree_type *n;
|
|
|
|
n = 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;
|
|
n->assert_s.child = exp;
|
|
n->assert_s.message = message;
|
|
return n;
|
|
}
|
|
|
|
void
|
|
exp_print_tree (etree_type *tree)
|
|
{
|
|
if (config.map_file == NULL)
|
|
config.map_file = stderr;
|
|
|
|
if (tree == NULL)
|
|
{
|
|
minfo ("NULL TREE\n");
|
|
return;
|
|
}
|
|
|
|
switch (tree->type.node_class)
|
|
{
|
|
case etree_value:
|
|
minfo ("0x%v", tree->value.value);
|
|
return;
|
|
case etree_rel:
|
|
if (tree->rel.section->owner != NULL)
|
|
minfo ("%B:", tree->rel.section->owner);
|
|
minfo ("%s+0x%v", tree->rel.section->name, tree->rel.value);
|
|
return;
|
|
case etree_assign:
|
|
fprintf (config.map_file, "%s", tree->assign.dst);
|
|
exp_print_token (tree->type.node_code, TRUE);
|
|
exp_print_tree (tree->assign.src);
|
|
break;
|
|
case etree_provide:
|
|
case etree_provided:
|
|
fprintf (config.map_file, "PROVIDE (%s, ", tree->assign.dst);
|
|
exp_print_tree (tree->assign.src);
|
|
fprintf (config.map_file, ")");
|
|
break;
|
|
case etree_binary:
|
|
fprintf (config.map_file, "(");
|
|
exp_print_tree (tree->binary.lhs);
|
|
exp_print_token (tree->type.node_code, TRUE);
|
|
exp_print_tree (tree->binary.rhs);
|
|
fprintf (config.map_file, ")");
|
|
break;
|
|
case etree_trinary:
|
|
exp_print_tree (tree->trinary.cond);
|
|
fprintf (config.map_file, "?");
|
|
exp_print_tree (tree->trinary.lhs);
|
|
fprintf (config.map_file, ":");
|
|
exp_print_tree (tree->trinary.rhs);
|
|
break;
|
|
case etree_unary:
|
|
exp_print_token (tree->unary.type.node_code, FALSE);
|
|
if (tree->unary.child)
|
|
{
|
|
fprintf (config.map_file, " (");
|
|
exp_print_tree (tree->unary.child);
|
|
fprintf (config.map_file, ")");
|
|
}
|
|
break;
|
|
|
|
case etree_assert:
|
|
fprintf (config.map_file, "ASSERT (");
|
|
exp_print_tree (tree->assert_s.child);
|
|
fprintf (config.map_file, ", %s)", tree->assert_s.message);
|
|
break;
|
|
|
|
case etree_name:
|
|
if (tree->type.node_code == NAME)
|
|
{
|
|
fprintf (config.map_file, "%s", tree->name.name);
|
|
}
|
|
else
|
|
{
|
|
exp_print_token (tree->type.node_code, FALSE);
|
|
if (tree->name.name)
|
|
fprintf (config.map_file, " (%s)", tree->name.name);
|
|
}
|
|
break;
|
|
default:
|
|
FAIL ();
|
|
break;
|
|
}
|
|
}
|
|
|
|
bfd_vma
|
|
exp_get_vma (etree_type *tree, bfd_vma def, char *name)
|
|
{
|
|
if (tree != NULL)
|
|
{
|
|
exp_fold_tree_no_dot (tree);
|
|
if (expld.result.valid_p)
|
|
return expld.result.value;
|
|
else if (name != NULL && expld.phase != lang_mark_phase_enum)
|
|
einfo (_("%F%S nonconstant expression for %s\n"), name);
|
|
}
|
|
return def;
|
|
}
|
|
|
|
int
|
|
exp_get_value_int (etree_type *tree, int def, char *name)
|
|
{
|
|
return exp_get_vma (tree, def, name);
|
|
}
|
|
|
|
fill_type *
|
|
exp_get_fill (etree_type *tree, fill_type *def, char *name)
|
|
{
|
|
fill_type *fill;
|
|
size_t len;
|
|
unsigned int val;
|
|
|
|
if (tree == NULL)
|
|
return def;
|
|
|
|
exp_fold_tree_no_dot (tree);
|
|
if (!expld.result.valid_p)
|
|
{
|
|
if (name != NULL && expld.phase != lang_mark_phase_enum)
|
|
einfo (_("%F%S nonconstant expression for %s\n"), name);
|
|
return def;
|
|
}
|
|
|
|
if (expld.result.str != NULL && (len = strlen (expld.result.str)) != 0)
|
|
{
|
|
unsigned char *dst;
|
|
unsigned char *s;
|
|
fill = xmalloc ((len + 1) / 2 + sizeof (*fill) - 1);
|
|
fill->size = (len + 1) / 2;
|
|
dst = fill->data;
|
|
s = (unsigned char *) expld.result.str;
|
|
val = 0;
|
|
do
|
|
{
|
|
unsigned int digit;
|
|
|
|
digit = *s++ - '0';
|
|
if (digit > 9)
|
|
digit = (digit - 'A' + '0' + 10) & 0xf;
|
|
val <<= 4;
|
|
val += digit;
|
|
--len;
|
|
if ((len & 1) == 0)
|
|
{
|
|
*dst++ = val;
|
|
val = 0;
|
|
}
|
|
}
|
|
while (len != 0);
|
|
}
|
|
else
|
|
{
|
|
fill = xmalloc (4 + sizeof (*fill) - 1);
|
|
val = expld.result.value;
|
|
fill->data[0] = (val >> 24) & 0xff;
|
|
fill->data[1] = (val >> 16) & 0xff;
|
|
fill->data[2] = (val >> 8) & 0xff;
|
|
fill->data[3] = (val >> 0) & 0xff;
|
|
fill->size = 4;
|
|
}
|
|
return fill;
|
|
}
|
|
|
|
bfd_vma
|
|
exp_get_abs_int (etree_type *tree, int def, char *name)
|
|
{
|
|
if (tree != NULL)
|
|
{
|
|
exp_fold_tree_no_dot (tree);
|
|
|
|
if (expld.result.valid_p)
|
|
{
|
|
expld.result.value += expld.result.section->vma;
|
|
return expld.result.value;
|
|
}
|
|
else if (name != NULL && expld.phase != lang_mark_phase_enum)
|
|
{
|
|
lineno = tree->type.lineno;
|
|
einfo (_("%F%S: nonconstant expression for %s\n"), name);
|
|
}
|
|
}
|
|
return def;
|
|
}
|
|
|
|
static bfd_vma
|
|
align_n (bfd_vma value, bfd_vma align)
|
|
{
|
|
if (align <= 1)
|
|
return value;
|
|
|
|
value = (value + align - 1) / align;
|
|
return value * align;
|
|
}
|