/* Support for the generic parts of COFF, for BFD.
- Copyright (C) 1990-2014 Free Software Foundation, Inc.
+ Copyright (C) 1990-2016 Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
/* Compress/decompress DWARF debug sections with names: .debug_* and
.zdebug_*, after the section flags is set. */
if ((flags & SEC_DEBUGGING)
+ && strlen (name) > 7
&& ((name[1] == 'd' && name[6] == '_')
- || (name[1] == 'z' && name[7] == '_')))
+ || (strlen (name) > 8 && name[1] == 'z' && name[7] == '_')))
{
enum { nothing, compress, decompress } action = nothing;
char *new_name = NULL;
abfd, name);
return FALSE;
}
- if (name[1] != 'z')
+ if (return_section->compress_status == COMPRESS_SECTION_DONE)
{
- unsigned int len = strlen (name);
+ if (name[1] != 'z')
+ {
+ unsigned int len = strlen (name);
- new_name = bfd_alloc (abfd, len + 2);
- if (new_name == NULL)
- return FALSE;
- new_name[0] = '.';
- new_name[1] = 'z';
- memcpy (new_name + 2, name + 1, len);
+ new_name = bfd_alloc (abfd, len + 2);
+ if (new_name == NULL)
+ return FALSE;
+ new_name[0] = '.';
+ new_name[1] = 'z';
+ memcpy (new_name + 2, name + 1, len);
+ }
}
- break;
+ break;
case decompress:
if (!bfd_init_section_decompress_status (abfd, return_section))
{
bfd_release (abfd, opthdr);
return NULL;
}
+ /* PR 17512: file: 11056-1136-0.004. */
+ if (internal_f.f_opthdr < aoutsz)
+ memset (((char *) opthdr) + internal_f.f_opthdr, 0, aoutsz - internal_f.f_opthdr);
+
bfd_coff_swap_aouthdr_in (abfd, opthdr, (void *) &internal_a);
bfd_release (abfd, opthdr);
}
if (strings == NULL)
return NULL;
}
- if (sym->_n._n_n._n_offset >= obj_coff_strings_len (abfd))
+ /* PR 17910: Only check for string overflow if the length has been set.
+ Some DLLs, eg those produced by Visual Studio, may not set the length field. */
+ if (obj_coff_strings_len (abfd) > 0
+ && sym->_n._n_n._n_offset >= obj_coff_strings_len (abfd))
return NULL;
return strings + sym->_n._n_n._n_offset;
}
return total;
}
-/* Takes a bfd and a symbol, returns a pointer to the coff specific
- area of the symbol if there is one. */
-
-coff_symbol_type *
-coff_symbol_from (bfd *ignore_abfd ATTRIBUTE_UNUSED,
- asymbol *symbol)
-{
- if (!bfd_family_coff (bfd_asymbol_bfd (symbol)))
- return (coff_symbol_type *) NULL;
-
- if (bfd_asymbol_bfd (symbol)->tdata.coff_obj_data == (coff_data_type *) NULL)
- return (coff_symbol_type *) NULL;
-
- return (coff_symbol_type *) symbol;
-}
-
static void
fixup_symbol_value (bfd *abfd,
coff_symbol_type *coff_symbol_ptr,
for (symbol_index = 0; symbol_index < symbol_count; symbol_index++)
{
- coff_symbol_type *coff_symbol_ptr = coff_symbol_from (bfd_ptr, symbol_ptr_ptr[symbol_index]);
+ coff_symbol_type *coff_symbol_ptr;
+
+ coff_symbol_ptr = coff_symbol_from (symbol_ptr_ptr[symbol_index]);
symbol_ptr_ptr[symbol_index]->udata.i = symbol_index;
if (coff_symbol_ptr && coff_symbol_ptr->native)
{
combined_entry_type *s = coff_symbol_ptr->native;
int i;
+ BFD_ASSERT (s->is_sym);
if (s->u.syment.n_sclass == C_FILE)
{
if (last_file != NULL)
for (symbol_index = 0; symbol_index < symbol_count; symbol_index++)
{
- coff_symbol_type *coff_symbol_ptr =
- coff_symbol_from (bfd_ptr, symbol_ptr_ptr[symbol_index]);
+ coff_symbol_type *coff_symbol_ptr;
+ coff_symbol_ptr = coff_symbol_from (symbol_ptr_ptr[symbol_index]);
if (coff_symbol_ptr && coff_symbol_ptr->native)
{
int i;
combined_entry_type *s = coff_symbol_ptr->native;
+ BFD_ASSERT (s->is_sym);
if (s->fix_value)
{
/* FIXME: We should use a union here. */
for (i = 0; i < s->u.syment.n_numaux; i++)
{
combined_entry_type *a = s + i + 1;
+
+ BFD_ASSERT (! a->is_sym);
if (a->fix_tag)
{
a->u.auxent.x_sym.x_tagndx.l =
}
name_length = strlen (name);
+ BFD_ASSERT (native->is_sym);
if (native->u.syment.n_sclass == C_FILE
&& native->u.syment.n_numaux > 0)
{
else
strncpy (native->u.syment._n._n_name, ".file", SYMNMLEN);
+ BFD_ASSERT (! (native + 1)->is_sym);
auxent = &(native + 1)->u.auxent;
filnmlen = bfd_coff_filnmlen (abfd);
void * buf;
bfd_size_type symesz;
+ BFD_ASSERT (native->is_sym);
+
if (native->u.syment.n_sclass == C_FILE)
symbol->flags |= BSF_DEBUGGING;
return FALSE;
for (j = 0; j < native->u.syment.n_numaux; j++)
{
+ BFD_ASSERT (! (native + j + 1)->is_sym);
bfd_coff_swap_aux_out (abfd,
&((native + j + 1)->u.auxent),
type, n_sclass, (int) j,
coff_write_alien_symbol (bfd *abfd,
asymbol *symbol,
struct internal_syment *isym,
+ union internal_auxent *iaux,
bfd_vma *written,
bfd_size_type *string_size_p,
asection **debug_string_section_p,
{
symbol->name = "";
if (isym != NULL)
- memset (isym, 0, sizeof(*isym));
+ memset (isym, 0, sizeof (*isym));
return TRUE;
}
native = dummy;
+ native->is_sym = TRUE;
+ native[1].is_sym = FALSE;
native->u.syment.n_type = T_NULL;
native->u.syment.n_flags = 0;
native->u.syment.n_numaux = 0;
name to keep it from being put in the string table. */
symbol->name = "";
if (isym != NULL)
- memset (isym, 0, sizeof(*isym));
+ memset (isym, 0, sizeof (*isym));
return TRUE;
}
else
/* Copy the any flags from the file header into the symbol.
FIXME: Why? */
{
- coff_symbol_type *c = coff_symbol_from (abfd, symbol);
+ coff_symbol_type *c = coff_symbol_from (symbol);
if (c != (coff_symbol_type *) NULL)
native->u.syment.n_flags = bfd_asymbol_bfd (&c->symbol)->flags;
}
debug_string_section_p, debug_string_size_p);
if (isym != NULL)
*isym = native->u.syment;
+ if (iaux != NULL && native->u.syment.n_numaux)
+ *iaux = native[1].u.auxent;
return ret;
}
return TRUE;
}
+ BFD_ASSERT (native->is_sym);
/* If this symbol has an associated line number, we must store the
symbol index in the line number field. We also tag the auxent to
point to the right place in the lineno table. */
}
static void
-null_error_handler (const char * fmt ATTRIBUTE_UNUSED, ...)
+null_error_handler (const char *fmt ATTRIBUTE_UNUSED,
+ va_list ap ATTRIBUTE_UNUSED)
{
}
for (p = abfd->outsymbols, i = 0; i < limit; i++, p++)
{
asymbol *symbol = *p;
- coff_symbol_type *c_symbol = coff_symbol_from (abfd, symbol);
+ coff_symbol_type *c_symbol = coff_symbol_from (symbol);
if (c_symbol == (coff_symbol_type *) NULL
|| c_symbol->native == (combined_entry_type *) NULL)
{
- if (!coff_write_alien_symbol (abfd, symbol, NULL, &written,
+ if (!coff_write_alien_symbol (abfd, symbol, NULL, NULL, &written,
&string_size, &debug_string_section,
&debug_string_size))
return FALSE;
symbol which has no associated section and we do not have to
worry about this, all we need to know is that it is local. */
current_error_handler = bfd_set_error_handler (null_error_handler);
+ BFD_ASSERT (c_symbol->native->is_sym);
sym_class = bfd_coff_classify_symbol (abfd,
- &c_symbol->native->u.syment);
+ &c_symbol->native->u.syment);
(void) bfd_set_error_handler (current_error_handler);
n_sclass = &c_symbol->native->u.syment.n_sclass;
{
asymbol *q = *p;
size_t name_length = strlen (q->name);
- coff_symbol_type *c_symbol = coff_symbol_from (abfd, q);
+ coff_symbol_type *c_symbol = coff_symbol_from (q);
size_t maxlen;
/* Figure out whether the symbol name should go in the string
file name, nor does it go in the .debug section. */
maxlen = bfd_coff_force_symnames_in_strings (abfd) ? 0 : SYMNMLEN;
+ else if (! c_symbol->native->is_sym)
+ maxlen = bfd_coff_force_symnames_in_strings (abfd) ? 0 : SYMNMLEN;
+
else if (bfd_coff_symname_in_debug (abfd,
&c_symbol->native->u.syment))
/* This symbol name is in the XCOFF .debug section.
{
/* Found a linenumber entry, output. */
struct internal_lineno out;
+
memset ((void *) & out, 0, sizeof (out));
out.l_lnno = 0;
out.l_addr.l_symndx = l->u.offset;
unsigned int type = symbol->u.syment.n_type;
unsigned int n_sclass = symbol->u.syment.n_sclass;
+ BFD_ASSERT (symbol->is_sym);
if (coff_backend_info (abfd)->_bfd_coff_pointerize_aux_hook)
{
if ((*coff_backend_info (abfd)->_bfd_coff_pointerize_aux_hook)
if (n_sclass == C_FILE)
return;
+ BFD_ASSERT (! auxent->is_sym);
/* Otherwise patch up. */
#define N_TMASK coff_data (abfd)->local_n_tmask
#define N_BTSHFT coff_data (abfd)->local_n_btshft
}
strings = (char *) bfd_malloc (strsize + 1);
+ if (strings == NULL)
+ return NULL;
+
/* PR 17521 file: 079-54929-0.004.
A corrupt file could contain an index that points into the first
STRING_SIZE_SIZE bytes of the string table, so make sure that
they are zero. */
memset (strings, 0, STRING_SIZE_SIZE);
- if (strings == NULL)
- return NULL;
-
if (bfd_bread (strings + STRING_SIZE_SIZE, strsize - STRING_SIZE_SIZE, abfd)
!= strsize - STRING_SIZE_SIZE)
{
if (internal == NULL && size != 0)
return NULL;
internal_end = internal + obj_raw_syment_count (abfd);
-
+
raw_src = (char *) obj_coff_external_syms (abfd);
/* Mark the end of the symbols. */
bfd_coff_swap_sym_in (abfd, (void *) raw_src,
(void *) & internal_ptr->u.syment);
symbol_ptr = internal_ptr;
+ internal_ptr->is_sym = TRUE;
+
+ /* PR 17512: file: 1353-1166-0.004. */
+ if (symbol_ptr->u.syment.n_sclass == C_FILE
+ && symbol_ptr->u.syment.n_numaux > 0
+ && raw_src + symesz + symbol_ptr->u.syment.n_numaux
+ * symesz > raw_end)
+ {
+ bfd_release (abfd, internal);
+ return NULL;
+ }
for (i = 0;
i < symbol_ptr->u.syment.n_numaux;
internal_ptr++;
/* PR 17512: Prevent buffer overrun. */
if (internal_ptr >= internal_end)
- return NULL;
+ {
+ bfd_release (abfd, internal);
+ return NULL;
+ }
raw_src += symesz;
bfd_coff_swap_aux_in (abfd, (void *) raw_src,
symbol_ptr->u.syment.n_sclass,
(int) i, symbol_ptr->u.syment.n_numaux,
&(internal_ptr->u.auxent));
+
+ internal_ptr->is_sym = FALSE;
coff_pointerize_aux (abfd, internal, symbol_ptr, i,
internal_ptr);
}
for (internal_ptr = internal; internal_ptr < internal_end;
internal_ptr++)
{
+ BFD_ASSERT (internal_ptr->is_sym);
+
if (internal_ptr->u.syment.n_sclass == C_FILE
&& internal_ptr->u.syment.n_numaux > 0)
{
+ combined_entry_type * aux = internal_ptr + 1;
+
/* Make a file symbol point to the name in the auxent, since
the text ".file" is redundant. */
- if ((internal_ptr + 1)->u.auxent.x_file.x_n.x_zeroes == 0)
+ BFD_ASSERT (! aux->is_sym);
+
+ if (aux->u.auxent.x_file.x_n.x_zeroes == 0)
{
/* The filename is a long one, point into the string table. */
if (string_table == NULL)
if (string_table == NULL)
return NULL;
}
- if ((bfd_size_type)((internal_ptr + 1)->u.auxent.x_file.x_n.x_offset)
+
+ if ((bfd_size_type)(aux->u.auxent.x_file.x_n.x_offset)
>= obj_coff_strings_len (abfd))
internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) _("<corrupt>");
else
internal_ptr->u.syment._n._n_n._n_offset =
- ((bfd_hostptr_t)
- (string_table
- + (internal_ptr + 1)->u.auxent.x_file.x_n.x_offset));
+ (bfd_hostptr_t) (string_table + (aux->u.auxent.x_file.x_n.x_offset));
}
else
{
if (internal_ptr->u.syment.n_numaux > 1
&& coff_data (abfd)->pe)
internal_ptr->u.syment._n._n_n._n_offset =
- ((bfd_hostptr_t)
- copy_name (abfd,
- (internal_ptr + 1)->u.auxent.x_file.x_fname,
- internal_ptr->u.syment.n_numaux * symesz));
+ (bfd_hostptr_t)
+ copy_name (abfd,
+ aux->u.auxent.x_file.x_fname,
+ internal_ptr->u.syment.n_numaux * symesz);
else
internal_ptr->u.syment._n._n_n._n_offset =
((bfd_hostptr_t)
copy_name (abfd,
- (internal_ptr + 1)->u.auxent.x_file.x_fname,
+ aux->u.auxent.x_file.x_fname,
(size_t) bfd_coff_filnmlen (abfd)));
}
}
if (new_symbol == NULL)
return NULL;
new_symbol->symbol.section = 0;
- new_symbol->native = 0;
+ new_symbol->native = NULL;
new_symbol->lineno = NULL;
new_symbol->done_lineno = FALSE;
new_symbol->symbol.the_bfd = abfd;
new_symbol->native = (combined_entry_type *) bfd_zalloc (abfd, amt);
if (!new_symbol->native)
return NULL;
+ new_symbol->native->is_sym = TRUE;
new_symbol->symbol.section = bfd_abs_section_ptr;
new_symbol->symbol.flags = BSF_DEBUGGING;
new_symbol->lineno = NULL;
bfd_symbol_info (symbol, ret);
if (coffsymbol (symbol)->native != NULL
- && coffsymbol (symbol)->native->fix_value)
+ && coffsymbol (symbol)->native->fix_value
+ && coffsymbol (symbol)->native->is_sym)
ret->value = coffsymbol (symbol)->native->u.syment.n_value -
(bfd_hostptr_t) obj_raw_syments (abfd);
}
-/* Return the COFF syment for a symbol. */
-
-bfd_boolean
-bfd_coff_get_syment (bfd *abfd,
- asymbol *symbol,
- struct internal_syment *psyment)
-{
- coff_symbol_type *csym;
-
- csym = coff_symbol_from (abfd, symbol);
- if (csym == NULL || csym->native == NULL)
- {
- bfd_set_error (bfd_error_invalid_operation);
- return FALSE;
- }
-
- *psyment = csym->native->u.syment;
-
- if (csym->native->fix_value)
- psyment->n_value = psyment->n_value -
- (bfd_hostptr_t) obj_raw_syments (abfd);
-
- /* FIXME: We should handle fix_line here. */
-
- return TRUE;
-}
-
-/* Return the COFF auxent for a symbol. */
-
-bfd_boolean
-bfd_coff_get_auxent (bfd *abfd,
- asymbol *symbol,
- int indx,
- union internal_auxent *pauxent)
-{
- coff_symbol_type *csym;
- combined_entry_type *ent;
-
- csym = coff_symbol_from (abfd, symbol);
-
- if (csym == NULL
- || csym->native == NULL
- || indx >= csym->native->u.syment.n_numaux)
- {
- bfd_set_error (bfd_error_invalid_operation);
- return FALSE;
- }
-
- ent = csym->native + indx + 1;
-
- *pauxent = ent->u.auxent;
-
- if (ent->fix_tag)
- pauxent->x_sym.x_tagndx.l =
- ((combined_entry_type *) pauxent->x_sym.x_tagndx.p
- - obj_raw_syments (abfd));
-
- if (ent->fix_end)
- pauxent->x_sym.x_fcnary.x_fcn.x_endndx.l =
- ((combined_entry_type *) pauxent->x_sym.x_fcnary.x_fcn.x_endndx.p
- - obj_raw_syments (abfd));
-
- if (ent->fix_scnlen)
- pauxent->x_csect.x_scnlen.l =
- ((combined_entry_type *) pauxent->x_csect.x_scnlen.p
- - obj_raw_syments (abfd));
-
- return TRUE;
-}
-
/* Print out information about COFF symbol. */
void
fprintf (file, "[%3ld]", (long) (combined - root));
+ /* PR 17512: file: 079-33786-0.001:0.1. */
+ if (combined < obj_raw_syments (abfd)
+ || combined >= obj_raw_syments (abfd) + obj_raw_syment_count (abfd))
+ {
+ fprintf (file, _("<corrupt info> %s"), symbol->name);
+ break;
+ }
+
+ BFD_ASSERT (combined->is_sym);
if (! combined->fix_value)
val = (bfd_vma) combined->u.syment.n_value;
else
combined_entry_type *auxp = combined + aux + 1;
long tagndx;
+ BFD_ASSERT (! auxp->is_sym);
if (auxp->fix_tag)
tagndx = auxp->u.auxent.x_sym.x_tagndx.p - root;
else
l++;
while (l->line_number)
{
- fprintf (file, "\n%4d : ", l->line_number);
- bfd_fprintf_vma (abfd, file, l->u.offset + symbol->section->vma);
+ if (l->line_number > 0)
+ {
+ fprintf (file, "\n%4d : ", l->line_number);
+ bfd_fprintf_vma (abfd, file, l->u.offset + symbol->section->vma);
+ }
l++;
}
}
&coff_data(abfd)->dwarf2_find_line_info))
return TRUE;
+ /* If the DWARF lookup failed, but there is DWARF information available
+ then the problem might be that the file has been rebased. This tool
+ changes the VMAs of all the sections, but it does not update the DWARF
+ information. So try again, using a bias against the address sought. */
+ if (coff_data (abfd)->dwarf2_find_line_info != NULL)
+ {
+ bfd_signed_vma bias;
+
+ bias = _bfd_dwarf2_find_symbol_bias (symbols,
+ & coff_data (abfd)->dwarf2_find_line_info);
+
+ if (bias
+ && _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section,
+ offset + bias,
+ filename_ptr, functionname_ptr,
+ line_ptr, NULL, debug_sections, 0,
+ &coff_data(abfd)->dwarf2_find_line_info))
+ return TRUE;
+ }
+
*filename_ptr = 0;
*functionname_ptr = 0;
*line_ptr = 0;
pend = p + cof->raw_syment_count;
while (p < pend)
{
+ BFD_ASSERT (p->is_sym);
if (p->u.syment.n_sclass == C_FILE)
break;
p += 1 + p->u.syment.n_numaux;
p2 < pend;
p2 += 1 + p2->u.syment.n_numaux)
{
+ BFD_ASSERT (p2->is_sym);
if (p2->u.syment.n_scnum > 0
&& (section
== coff_section_from_bfd_index (abfd,
break;
}
}
+ if (p2 >= pend)
+ break;
file_addr = (bfd_vma) p2->u.syment.n_value;
/* PR 11512: Include the section address of the function name symbol. */
if (coff->native)
{
combined_entry_type *s = coff->native;
+
+ BFD_ASSERT (s->is_sym);
s = s + 1 + s->u.syment.n_numaux;
/* In XCOFF a debugging symbol can follow the
{
/* The linenumber is stored in the auxent. */
union internal_auxent *a = &((s + 1)->u.auxent);
+
line_base = a->x_sym.x_misc.x_lnsz.x_lnno;
*line_ptr = line_base;
}
{
size_t size;
- if (!info->relocatable)
+ if (!bfd_link_relocatable (info))
size = bfd_coff_filhsz (abfd) + bfd_coff_aoutsz (abfd);
else
size = bfd_coff_filhsz (abfd);
{
coff_symbol_type * csym;
- csym = coff_symbol_from (abfd, symbol);
+ csym = coff_symbol_from (symbol);
if (csym == NULL)
{
bfd_set_error (bfd_error_invalid_operation);
if (native == NULL)
return FALSE;
+ native->is_sym = TRUE;
native->u.syment.n_type = T_NULL;
native->u.syment.n_sclass = symbol_class;
return TRUE;
}
-struct coff_comdat_info *
-bfd_coff_get_comdat_section (bfd *abfd, struct bfd_section *sec)
-{
- if (bfd_get_flavour (abfd) == bfd_target_coff_flavour
- && coff_section_data (abfd, sec) != NULL)
- return coff_section_data (abfd, sec)->comdat;
- else
- return NULL;
-}
-
bfd_boolean
_bfd_coff_section_already_linked (bfd *abfd,
asection *sec,
info->callbacks->einfo (_("%F%P: already_linked_table: %E\n"));
return FALSE;
}
+
+/* Initialize COOKIE for input bfd ABFD. */
+
+static bfd_boolean
+init_reloc_cookie (struct coff_reloc_cookie *cookie,
+ struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ bfd *abfd)
+{
+ /* Sometimes the symbol table does not yet have been loaded here. */
+ bfd_coff_slurp_symbol_table (abfd);
+
+ cookie->abfd = abfd;
+ cookie->sym_hashes = obj_coff_sym_hashes (abfd);
+
+ cookie->symbols = obj_symbols (abfd);
+
+ return TRUE;
+}
+
+/* Free the memory allocated by init_reloc_cookie, if appropriate. */
+
+static void
+fini_reloc_cookie (struct coff_reloc_cookie *cookie ATTRIBUTE_UNUSED,
+ bfd *abfd ATTRIBUTE_UNUSED)
+{
+ /* Nothing to do. */
+}
+
+/* Initialize the relocation information in COOKIE for input section SEC
+ of input bfd ABFD. */
+
+static bfd_boolean
+init_reloc_cookie_rels (struct coff_reloc_cookie *cookie,
+ struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ bfd *abfd,
+ asection *sec)
+{
+ if (sec->reloc_count == 0)
+ {
+ cookie->rels = NULL;
+ cookie->relend = NULL;
+ cookie->rel = NULL;
+ return TRUE;
+ }
+
+ cookie->rels = _bfd_coff_read_internal_relocs (abfd, sec, FALSE, NULL, 0, NULL);
+
+ if (cookie->rels == NULL)
+ return FALSE;
+
+ cookie->rel = cookie->rels;
+ cookie->relend = (cookie->rels + sec->reloc_count);
+ return TRUE;
+}
+
+/* Free the memory allocated by init_reloc_cookie_rels,
+ if appropriate. */
+
+static void
+fini_reloc_cookie_rels (struct coff_reloc_cookie *cookie,
+ asection *sec)
+{
+ if (cookie->rels
+ /* PR 20401. The relocs may not have been cached, so check first.
+ If the relocs were loaded by init_reloc_cookie_rels() then this
+ will be the case. FIXME: Would performance be improved if the
+ relocs *were* cached ? */
+ && coff_section_data (NULL, sec)
+ && coff_section_data (NULL, sec)->relocs != cookie->rels)
+ free (cookie->rels);
+}
+
+/* Initialize the whole of COOKIE for input section SEC. */
+
+static bfd_boolean
+init_reloc_cookie_for_section (struct coff_reloc_cookie *cookie,
+ struct bfd_link_info *info,
+ asection *sec)
+{
+ if (!init_reloc_cookie (cookie, info, sec->owner))
+ return FALSE;
+
+ if (!init_reloc_cookie_rels (cookie, info, sec->owner, sec))
+ {
+ fini_reloc_cookie (cookie, sec->owner);
+ return FALSE;
+ }
+ return TRUE;
+}
+
+/* Free the memory allocated by init_reloc_cookie_for_section,
+ if appropriate. */
+
+static void
+fini_reloc_cookie_for_section (struct coff_reloc_cookie *cookie,
+ asection *sec)
+{
+ fini_reloc_cookie_rels (cookie, sec);
+ fini_reloc_cookie (cookie, sec->owner);
+}
+
+static asection *
+_bfd_coff_gc_mark_hook (asection *sec,
+ struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ struct internal_reloc *rel ATTRIBUTE_UNUSED,
+ struct coff_link_hash_entry *h,
+ struct internal_syment *sym)
+{
+ if (h != NULL)
+ {
+ switch (h->root.type)
+ {
+ case bfd_link_hash_defined:
+ case bfd_link_hash_defweak:
+ return h->root.u.def.section;
+
+ case bfd_link_hash_common:
+ return h->root.u.c.p->section;
+
+ case bfd_link_hash_undefined:
+ case bfd_link_hash_undefweak:
+ default:
+ break;
+ }
+ return NULL;
+ }
+
+ return coff_section_from_bfd_index (sec->owner, sym->n_scnum);
+}
+
+/* COOKIE->rel describes a relocation against section SEC, which is
+ a section we've decided to keep. Return the section that contains
+ the relocation symbol, or NULL if no section contains it. */
+
+static asection *
+_bfd_coff_gc_mark_rsec (struct bfd_link_info *info, asection *sec,
+ coff_gc_mark_hook_fn gc_mark_hook,
+ struct coff_reloc_cookie *cookie)
+{
+ struct coff_link_hash_entry *h;
+
+ h = cookie->sym_hashes[cookie->rel->r_symndx];
+ if (h != NULL)
+ {
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct coff_link_hash_entry *) h->root.u.i.link;
+
+ return (*gc_mark_hook) (sec, info, cookie->rel, h, NULL);
+ }
+
+ return (*gc_mark_hook) (sec, info, cookie->rel, NULL,
+ &(cookie->symbols
+ + obj_convert (sec->owner)[cookie->rel->r_symndx])->native->u.syment);
+}
+
+static bfd_boolean _bfd_coff_gc_mark
+ (struct bfd_link_info *, asection *, coff_gc_mark_hook_fn);
+
+/* COOKIE->rel describes a relocation against section SEC, which is
+ a section we've decided to keep. Mark the section that contains
+ the relocation symbol. */
+
+static bfd_boolean
+_bfd_coff_gc_mark_reloc (struct bfd_link_info *info,
+ asection *sec,
+ coff_gc_mark_hook_fn gc_mark_hook,
+ struct coff_reloc_cookie *cookie)
+{
+ asection *rsec;
+
+ rsec = _bfd_coff_gc_mark_rsec (info, sec, gc_mark_hook, cookie);
+ if (rsec && !rsec->gc_mark)
+ {
+ if (bfd_get_flavour (rsec->owner) != bfd_target_coff_flavour)
+ rsec->gc_mark = 1;
+ else if (!_bfd_coff_gc_mark (info, rsec, gc_mark_hook))
+ return FALSE;
+ }
+ return TRUE;
+}
+
+/* The mark phase of garbage collection. For a given section, mark
+ it and any sections in this section's group, and all the sections
+ which define symbols to which it refers. */
+
+static bfd_boolean
+_bfd_coff_gc_mark (struct bfd_link_info *info,
+ asection *sec,
+ coff_gc_mark_hook_fn gc_mark_hook)
+{
+ bfd_boolean ret = TRUE;
+
+ sec->gc_mark = 1;
+
+ /* Look through the section relocs. */
+ if ((sec->flags & SEC_RELOC) != 0
+ && sec->reloc_count > 0)
+ {
+ struct coff_reloc_cookie cookie;
+
+ if (!init_reloc_cookie_for_section (&cookie, info, sec))
+ ret = FALSE;
+ else
+ {
+ for (; cookie.rel < cookie.relend; cookie.rel++)
+ {
+ if (!_bfd_coff_gc_mark_reloc (info, sec, gc_mark_hook, &cookie))
+ {
+ ret = FALSE;
+ break;
+ }
+ }
+ fini_reloc_cookie_for_section (&cookie, sec);
+ }
+ }
+
+ return ret;
+}
+
+static bfd_boolean
+_bfd_coff_gc_mark_extra_sections (struct bfd_link_info *info,
+ coff_gc_mark_hook_fn mark_hook ATTRIBUTE_UNUSED)
+{
+ bfd *ibfd;
+
+ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
+ {
+ asection *isec;
+ bfd_boolean some_kept;
+
+ if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
+ continue;
+
+ /* Ensure all linker created sections are kept, and see whether
+ any other section is already marked. */
+ some_kept = FALSE;
+ for (isec = ibfd->sections; isec != NULL; isec = isec->next)
+ {
+ if ((isec->flags & SEC_LINKER_CREATED) != 0)
+ isec->gc_mark = 1;
+ else if (isec->gc_mark)
+ some_kept = TRUE;
+ }
+
+ /* If no section in this file will be kept, then we can
+ toss out debug sections. */
+ if (!some_kept)
+ continue;
+
+ /* Keep debug and special sections like .comment when they are
+ not part of a group, or when we have single-member groups. */
+ for (isec = ibfd->sections; isec != NULL; isec = isec->next)
+ if ((isec->flags & SEC_DEBUGGING) != 0
+ || (isec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) == 0)
+ isec->gc_mark = 1;
+ }
+ return TRUE;
+}
+
+/* Sweep symbols in swept sections. Called via coff_link_hash_traverse. */
+
+static bfd_boolean
+coff_gc_sweep_symbol (struct coff_link_hash_entry *h,
+ void *data ATTRIBUTE_UNUSED)
+{
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct coff_link_hash_entry *) h->root.u.i.link;
+
+ if ((h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && !h->root.u.def.section->gc_mark
+ && !(h->root.u.def.section->owner->flags & DYNAMIC))
+ {
+ /* Do our best to hide the symbol. */
+ h->root.u.def.section = bfd_und_section_ptr;
+ h->symbol_class = C_HIDDEN;
+ }
+
+ return TRUE;
+}
+
+/* The sweep phase of garbage collection. Remove all garbage sections. */
+
+typedef bfd_boolean (*gc_sweep_hook_fn)
+ (bfd *, struct bfd_link_info *, asection *, const struct internal_reloc *);
+
+static bfd_boolean
+coff_gc_sweep (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
+{
+ bfd *sub;
+
+ for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
+ {
+ asection *o;
+
+ if (bfd_get_flavour (sub) != bfd_target_coff_flavour)
+ continue;
+
+ for (o = sub->sections; o != NULL; o = o->next)
+ {
+ /* Keep debug and special sections. */
+ if ((o->flags & (SEC_DEBUGGING | SEC_LINKER_CREATED)) != 0
+ || (o->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) == 0)
+ o->gc_mark = 1;
+ else if (CONST_STRNEQ (o->name, ".idata")
+ || CONST_STRNEQ (o->name, ".pdata")
+ || CONST_STRNEQ (o->name, ".xdata")
+ || CONST_STRNEQ (o->name, ".rsrc"))
+ o->gc_mark = 1;
+
+ if (o->gc_mark)
+ continue;
+
+ /* Skip sweeping sections already excluded. */
+ if (o->flags & SEC_EXCLUDE)
+ continue;
+
+ /* Since this is early in the link process, it is simple
+ to remove a section from the output. */
+ o->flags |= SEC_EXCLUDE;
+
+ if (info->print_gc_sections && o->size != 0)
+ _bfd_error_handler (_("Removing unused section '%s' in file '%B'"), sub, o->name);
+
+#if 0
+ /* But we also have to update some of the relocation
+ info we collected before. */
+ if (gc_sweep_hook
+ && (o->flags & SEC_RELOC) != 0
+ && o->reloc_count > 0
+ && !bfd_is_abs_section (o->output_section))
+ {
+ struct internal_reloc *internal_relocs;
+ bfd_boolean r;
+
+ internal_relocs
+ = _bfd_coff_link_read_relocs (o->owner, o, NULL, NULL,
+ info->keep_memory);
+ if (internal_relocs == NULL)
+ return FALSE;
+
+ r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs);
+
+ if (coff_section_data (o)->relocs != internal_relocs)
+ free (internal_relocs);
+
+ if (!r)
+ return FALSE;
+ }
+#endif
+ }
+ }
+
+ /* Remove the symbols that were in the swept sections from the dynamic
+ symbol table. */
+ coff_link_hash_traverse (coff_hash_table (info), coff_gc_sweep_symbol,
+ NULL);
+
+ return TRUE;
+}
+
+/* Keep all sections containing symbols undefined on the command-line,
+ and the section containing the entry symbol. */
+
+static void
+_bfd_coff_gc_keep (struct bfd_link_info *info)
+{
+ struct bfd_sym_chain *sym;
+
+ for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
+ {
+ struct coff_link_hash_entry *h;
+
+ h = coff_link_hash_lookup (coff_hash_table (info), sym->name,
+ FALSE, FALSE, FALSE);
+
+ if (h != NULL
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && !bfd_is_abs_section (h->root.u.def.section))
+ h->root.u.def.section->flags |= SEC_KEEP;
+ }
+}
+
+/* Do mark and sweep of unused sections. */
+
+bfd_boolean
+bfd_coff_gc_sections (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
+{
+ bfd *sub;
+
+ /* FIXME: Should we implement this? */
+#if 0
+ const bfd_coff_backend_data *bed = coff_backend_info (abfd);
+
+ if (!bed->can_gc_sections
+ || !is_coff_hash_table (info->hash))
+ {
+ (*_bfd_error_handler)(_("Warning: gc-sections option ignored"));
+ return TRUE;
+ }
+#endif
+
+ _bfd_coff_gc_keep (info);
+
+ /* Grovel through relocs to find out who stays ... */
+ for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
+ {
+ asection *o;
+
+ if (bfd_get_flavour (sub) != bfd_target_coff_flavour)
+ continue;
+
+ for (o = sub->sections; o != NULL; o = o->next)
+ {
+ if (((o->flags & (SEC_EXCLUDE | SEC_KEEP)) == SEC_KEEP
+ || CONST_STRNEQ (o->name, ".vectors")
+ || CONST_STRNEQ (o->name, ".ctors")
+ || CONST_STRNEQ (o->name, ".dtors"))
+ && !o->gc_mark)
+ {
+ if (!_bfd_coff_gc_mark (info, o, _bfd_coff_gc_mark_hook))
+ return FALSE;
+ }
+ }
+ }
+
+ /* Allow the backend to mark additional target specific sections. */
+ _bfd_coff_gc_mark_extra_sections (info, _bfd_coff_gc_mark_hook);
+
+ /* ... and mark SEC_EXCLUDE for those that go. */
+ return coff_gc_sweep (abfd, info);
+}
projects / deliverable / binutils-gdb.git / blobdiff