X-Git-Url: http://drtracing.org/?a=blobdiff_plain;ds=sidebyside;f=bfd%2Fbinary.c;h=2223b5d2dfc5b2e4fb10a607f7070660d22d6818;hb=a43942db49b07a457ee4f960d0f118b23641ec38;hp=6d68b313a28d909d299d3da334f489606e33751b;hpb=fa803dc60f0bf01297674c41d001798e18ade4dc;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/binary.c b/bfd/binary.c index 6d68b313a2..2223b5d2df 100644 --- a/bfd/binary.c +++ b/bfd/binary.c @@ -1,22 +1,23 @@ /* BFD back-end for binary objects. - Copyright 1994 Free Software Foundation, Inc. + Copyright (C) 1994-2016 Free Software Foundation, Inc. Written by Ian Lance Taylor, Cygnus Support, -This file is part of BFD, the Binary File Descriptor library. + This file is part of BFD, the Binary File Descriptor library. -This program 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 of the License, or -(at your option) any later version. + This program 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 3 of the License, or + (at your option) any later version. -This program 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. + This program 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 this program; if not, write to the Free Software -Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ /* This is a BFD backend which may be used to write binary objects. It may only be used for output, not input. The intention is that @@ -31,36 +32,21 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ the file. objcopy cooperates by specially setting the start address to zero by default. */ -#include - -#include "bfd.h" #include "sysdep.h" +#include "bfd.h" +#include "safe-ctype.h" #include "libbfd.h" /* Any bfd we create by reading a binary file has three symbols: a start symbol, an end symbol, and an absolute length symbol. */ #define BIN_SYMS 3 -static boolean binary_mkobject PARAMS ((bfd *)); -static const bfd_target *binary_object_p PARAMS ((bfd *)); -static boolean binary_get_section_contents - PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type)); -static long binary_get_symtab_upper_bound PARAMS ((bfd *)); -static char *mangle_name PARAMS ((bfd *, char *)); -static long binary_get_symtab PARAMS ((bfd *, asymbol **)); -static asymbol *binary_make_empty_symbol PARAMS ((bfd *)); -static void binary_get_symbol_info PARAMS ((bfd *, asymbol *, symbol_info *)); -static boolean binary_set_section_contents - PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type)); -static int binary_sizeof_headers PARAMS ((bfd *, boolean)); - /* Create a binary object. Invoked via bfd_set_format. */ -static boolean -binary_mkobject (abfd) - bfd *abfd; +static bfd_boolean +binary_mkobject (bfd *abfd ATTRIBUTE_UNUSED) { - return true; + return TRUE; } /* Any file may be considered to be a binary file, provided the target @@ -68,11 +54,11 @@ binary_mkobject (abfd) being binary. */ static const bfd_target * -binary_object_p (abfd) - bfd *abfd; +binary_object_p (bfd *abfd) { struct stat statbuf; asection *sec; + flagword flags; if (abfd->target_defaulted) { @@ -90,44 +76,42 @@ binary_object_p (abfd) } /* One data section. */ - sec = bfd_make_section (abfd, ".data"); + flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS; + sec = bfd_make_section_with_flags (abfd, ".data", flags); if (sec == NULL) return NULL; - sec->flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS; sec->vma = 0; - sec->_raw_size = statbuf.st_size; + sec->size = statbuf.st_size; sec->filepos = 0; - abfd->tdata.any = (PTR) sec; + abfd->tdata.any = (void *) sec; return abfd->xvec; } -#define binary_close_and_cleanup _bfd_generic_close_and_cleanup -#define binary_bfd_free_cached_info _bfd_generic_bfd_free_cached_info -#define binary_new_section_hook _bfd_generic_new_section_hook +#define binary_close_and_cleanup _bfd_generic_close_and_cleanup +#define binary_bfd_free_cached_info _bfd_generic_bfd_free_cached_info +#define binary_new_section_hook _bfd_generic_new_section_hook /* Get contents of the only section. */ -static boolean -binary_get_section_contents (abfd, section, location, offset, count) - bfd *abfd; - asection *section; - PTR location; - file_ptr offset; - bfd_size_type count; +static bfd_boolean +binary_get_section_contents (bfd *abfd, + asection *section ATTRIBUTE_UNUSED, + void * location, + file_ptr offset, + bfd_size_type count) { if (bfd_seek (abfd, offset, SEEK_SET) != 0 - || bfd_read (location, 1, count, abfd) != count) - return false; - return true; + || bfd_bread (location, count, abfd) != count) + return FALSE; + return TRUE; } /* Return the amount of memory needed to read the symbol table. */ static long -binary_get_symtab_upper_bound (abfd) - bfd *abfd; +binary_get_symtab_upper_bound (bfd *abfd ATTRIBUTE_UNUSED) { return (BIN_SYMS + 1) * sizeof (asymbol *); } @@ -135,11 +119,9 @@ binary_get_symtab_upper_bound (abfd) /* Create a symbol name based on the bfd's filename. */ static char * -mangle_name (abfd, suffix) - bfd *abfd; - char *suffix; +mangle_name (bfd *abfd, char *suffix) { - int size; + bfd_size_type size; char *buf; char *p; @@ -155,7 +137,7 @@ mangle_name (abfd, suffix) /* Change any non-alphanumeric characters to underscores. */ for (p = buf; *p; p++) - if (! isalnum (*p)) + if (! ISALNUM (*p)) *p = '_'; return buf; @@ -164,17 +146,16 @@ mangle_name (abfd, suffix) /* Return the symbol table. */ static long -binary_get_symtab (abfd, alocation) - bfd *abfd; - asymbol **alocation; +binary_canonicalize_symtab (bfd *abfd, asymbol **alocation) { asection *sec = (asection *) abfd->tdata.any; asymbol *syms; unsigned int i; + bfd_size_type amt = BIN_SYMS * sizeof (asymbol); - syms = (asymbol *) bfd_alloc (abfd, BIN_SYMS * sizeof (asymbol)); + syms = (asymbol *) bfd_alloc (abfd, amt); if (syms == NULL) - return false; + return -1; /* Start symbol. */ syms[0].the_bfd = abfd; @@ -187,7 +168,7 @@ binary_get_symtab (abfd, alocation) /* End symbol. */ syms[1].the_bfd = abfd; syms[1].name = mangle_name (abfd, "end"); - syms[1].value = sec->_raw_size; + syms[1].value = sec->size; syms[1].flags = BSF_GLOBAL; syms[1].section = sec; syms[1].udata.p = NULL; @@ -195,7 +176,7 @@ binary_get_symtab (abfd, alocation) /* Size symbol. */ syms[2].the_bfd = abfd; syms[2].name = mangle_name (abfd, "size"); - syms[2].value = sec->_raw_size; + syms[2].value = sec->size; syms[2].flags = BSF_GLOBAL; syms[2].section = bfd_abs_section_ptr; syms[2].udata.p = NULL; @@ -207,108 +188,147 @@ binary_get_symtab (abfd, alocation) return BIN_SYMS; } -/* Make an empty symbol. */ - -static asymbol * -binary_make_empty_symbol (abfd) - bfd *abfd; -{ - return (asymbol *) bfd_alloc (abfd, sizeof (asymbol)); -} - -#define binary_print_symbol _bfd_nosymbols_print_symbol +#define binary_make_empty_symbol _bfd_generic_make_empty_symbol +#define binary_print_symbol _bfd_nosymbols_print_symbol +#define binary_get_symbol_version_string \ + _bfd_nosymbols_get_symbol_version_string /* Get information about a symbol. */ static void -binary_get_symbol_info (ignore_abfd, symbol, ret) - bfd *ignore_abfd; - asymbol *symbol; - symbol_info *ret; +binary_get_symbol_info (bfd *ignore_abfd ATTRIBUTE_UNUSED, + asymbol *symbol, + symbol_info *ret) { bfd_symbol_info (symbol, ret); } -#define binary_bfd_is_local_label bfd_generic_is_local_label -#define binary_get_lineno _bfd_nosymbols_get_lineno -#define binary_find_nearest_line _bfd_nosymbols_find_nearest_line -#define binary_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol -#define binary_read_minisymbols _bfd_generic_read_minisymbols -#define binary_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol - -#define binary_get_reloc_upper_bound \ - ((long (*) PARAMS ((bfd *, asection *))) bfd_0l) -#define binary_canonicalize_reloc \ - ((long (*) PARAMS ((bfd *, asection *, arelent **, asymbol **))) bfd_0l) -#define binary_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup +#define binary_bfd_is_local_label_name bfd_generic_is_local_label_name +#define binary_get_lineno _bfd_nosymbols_get_lineno +#define binary_find_nearest_line _bfd_nosymbols_find_nearest_line +#define binary_find_line _bfd_nosymbols_find_line +#define binary_find_inliner_info _bfd_nosymbols_find_inliner_info +#define binary_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol +#define binary_read_minisymbols _bfd_generic_read_minisymbols +#define binary_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol +#define binary_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) /* Set the architecture of a binary file. */ #define binary_set_arch_mach _bfd_generic_set_arch_mach /* Write section contents of a binary file. */ -static boolean -binary_set_section_contents (abfd, sec, data, offset, size) - bfd *abfd; - asection *sec; - PTR data; - file_ptr offset; - bfd_size_type size; +static bfd_boolean +binary_set_section_contents (bfd *abfd, + asection *sec, + const void * data, + file_ptr offset, + bfd_size_type size) { + if (size == 0) + return TRUE; + if (! abfd->output_has_begun) { + bfd_boolean found_low; bfd_vma low; asection *s; - /* The lowest section VMA sets the virtual address of the start - of the file. We use the set the file position of all the + /* The lowest section LMA sets the virtual address of the start + of the file. We use this to set the file position of all the sections. */ - low = abfd->sections->vma; - for (s = abfd->sections->next; s != NULL; s = s->next) - if (s->vma < low) - low = s->vma; - + found_low = FALSE; + low = 0; for (s = abfd->sections; s != NULL; s = s->next) - s->filepos = s->vma - low; + if (((s->flags + & (SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC | SEC_NEVER_LOAD)) + == (SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC)) + && (s->size > 0) + && (! found_low || s->lma < low)) + { + low = s->lma; + found_low = TRUE; + } - abfd->output_has_begun = true; + for (s = abfd->sections; s != NULL; s = s->next) + { + s->filepos = s->lma - low; + + /* Skip following warning check for sections that will not + occupy file space. */ + if ((s->flags + & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_NEVER_LOAD)) + != (SEC_HAS_CONTENTS | SEC_ALLOC) + || (s->size == 0)) + continue; + + /* If attempting to generate a binary file from a bfd with + LMA's all over the place, huge (sparse?) binary files may + result. This condition attempts to detect this situation + and print a warning. Better heuristics would be nice to + have. */ + + if (s->filepos < 0) + (*_bfd_error_handler) + (_("Warning: Writing section `%s' to huge (ie negative) file offset 0x%lx."), + bfd_get_section_name (abfd, s), + (unsigned long) s->filepos); + } + + abfd->output_has_begun = TRUE; } + /* We don't want to output anything for a section that is neither + loaded nor allocated. The contents of such a section are not + meaningful in the binary format. */ + if ((sec->flags & (SEC_LOAD | SEC_ALLOC)) == 0) + return TRUE; + if ((sec->flags & SEC_NEVER_LOAD) != 0) + return TRUE; + return _bfd_generic_set_section_contents (abfd, sec, data, offset, size); } /* No space is required for header information. */ static int -binary_sizeof_headers (abfd, exec) - bfd *abfd; - boolean exec; +binary_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info ATTRIBUTE_UNUSED) { return 0; } -#define binary_bfd_get_relocated_section_contents \ - bfd_generic_get_relocated_section_contents -#define binary_bfd_relax_section bfd_generic_relax_section -#define binary_bfd_link_hash_table_create _bfd_generic_link_hash_table_create -#define binary_bfd_link_add_symbols _bfd_generic_link_add_symbols -#define binary_bfd_final_link _bfd_generic_final_link -#define binary_bfd_link_split_section _bfd_generic_link_split_section -#define binary_get_section_contents_in_window \ - _bfd_generic_get_section_contents_in_window +#define binary_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents +#define binary_bfd_relax_section bfd_generic_relax_section +#define binary_bfd_gc_sections bfd_generic_gc_sections +#define binary_bfd_lookup_section_flags bfd_generic_lookup_section_flags +#define binary_bfd_merge_sections bfd_generic_merge_sections +#define binary_bfd_is_group_section bfd_generic_is_group_section +#define binary_bfd_discard_group bfd_generic_discard_group +#define binary_section_already_linked _bfd_generic_section_already_linked +#define binary_bfd_define_common_symbol bfd_generic_define_common_symbol +#define binary_bfd_link_hash_table_create _bfd_generic_link_hash_table_create +#define binary_bfd_link_just_syms _bfd_generic_link_just_syms +#define binary_bfd_copy_link_hash_symbol_type _bfd_generic_copy_link_hash_symbol_type +#define binary_bfd_link_add_symbols _bfd_generic_link_add_symbols +#define binary_bfd_final_link _bfd_generic_final_link +#define binary_bfd_link_split_section _bfd_generic_link_split_section +#define binary_get_section_contents_in_window _bfd_generic_get_section_contents_in_window +#define binary_bfd_link_check_relocs _bfd_generic_link_check_relocs const bfd_target binary_vec = { "binary", /* name */ bfd_target_unknown_flavour, /* flavour */ - true, /* byteorder_big_p */ - true, /* header_byteorder_big_p */ + BFD_ENDIAN_UNKNOWN, /* byteorder */ + BFD_ENDIAN_UNKNOWN, /* header_byteorder */ EXEC_P, /* object_flags */ (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS), /* section_flags */ 0, /* symbol_leading_char */ ' ', /* ar_pad_char */ 16, /* ar_max_namelen */ + 255, /* match priority. */ bfd_getb64, bfd_getb_signed_64, bfd_putb64, bfd_getb32, bfd_getb_signed_32, bfd_putb32, bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ @@ -317,7 +337,7 @@ const bfd_target binary_vec = bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ { /* bfd_check_format */ _bfd_dummy_target, - binary_object_p, /* bfd_check_format */ + binary_object_p, _bfd_dummy_target, _bfd_dummy_target, }, @@ -339,10 +359,12 @@ const bfd_target binary_vec = BFD_JUMP_TABLE_CORE (_bfd_nocore), BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), BFD_JUMP_TABLE_SYMBOLS (binary), - BFD_JUMP_TABLE_RELOCS (binary), + BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), BFD_JUMP_TABLE_WRITE (binary), BFD_JUMP_TABLE_LINK (binary), BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), + NULL, + NULL };