524 lines
16 KiB
C
524 lines
16 KiB
C
/* BFD back-end for a.out.adobe binaries.
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Copyright (C) 1990-2017 Free Software Foundation, Inc.
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Written by Cygnus Support. Based on bout.c.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "aout/adobe.h"
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#include "aout/stab_gnu.h"
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#include "libaout.h" /* BFD a.out internal data structures. */
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/* Forward decl. */
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extern const bfd_target aout_adobe_vec;
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/* Swaps the information in an executable header taken from a raw byte
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stream memory image, into the internal exec_header structure. */
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static void
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aout_adobe_swap_exec_header_in (bfd *abfd,
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struct external_exec *bytes,
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struct internal_exec *execp)
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{
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/* Now fill in fields in the execp, from the bytes in the raw data. */
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execp->a_info = H_GET_32 (abfd, bytes->e_info);
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execp->a_text = GET_WORD (abfd, bytes->e_text);
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execp->a_data = GET_WORD (abfd, bytes->e_data);
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execp->a_bss = GET_WORD (abfd, bytes->e_bss);
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execp->a_syms = GET_WORD (abfd, bytes->e_syms);
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execp->a_entry = GET_WORD (abfd, bytes->e_entry);
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execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
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execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
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}
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/* Swaps the information in an internal exec header structure into the
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supplied buffer ready for writing to disk. */
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static void
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aout_adobe_swap_exec_header_out (bfd *abfd,
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struct internal_exec *execp,
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struct external_exec *bytes)
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{
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/* Now fill in fields in the raw data, from the fields in the exec
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struct. */
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H_PUT_32 (abfd, execp->a_info , bytes->e_info);
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PUT_WORD (abfd, execp->a_text , bytes->e_text);
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PUT_WORD (abfd, execp->a_data , bytes->e_data);
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PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
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PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
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PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
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PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
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PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
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}
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/* Finish up the opening of a b.out file for reading. Fill in all the
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fields that are not handled by common code. */
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static const bfd_target *
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aout_adobe_callback (bfd *abfd)
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{
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struct internal_exec *execp = exec_hdr (abfd);
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asection *sect;
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struct external_segdesc ext[1];
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char *section_name;
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char try_again[30]; /* Name and number. */
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char *newname;
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int trynum;
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flagword flags;
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/* Architecture and machine type -- unknown in this format. */
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bfd_set_arch_mach (abfd, bfd_arch_unknown, 0L);
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/* The positions of the string table and symbol table. */
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obj_str_filepos (abfd) = N_STROFF (execp);
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obj_sym_filepos (abfd) = N_SYMOFF (execp);
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/* Suck up the section information from the file, one section at a time. */
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for (;;)
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{
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bfd_size_type amt = sizeof (*ext);
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if (bfd_bread ( ext, amt, abfd) != amt)
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{
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if (bfd_get_error () != bfd_error_system_call)
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bfd_set_error (bfd_error_wrong_format);
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return NULL;
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}
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switch (ext->e_type[0])
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{
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case N_TEXT:
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section_name = ".text";
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flags = SEC_CODE | SEC_LOAD | SEC_ALLOC | SEC_HAS_CONTENTS;
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break;
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case N_DATA:
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section_name = ".data";
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flags = SEC_DATA | SEC_LOAD | SEC_ALLOC | SEC_HAS_CONTENTS;
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break;
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case N_BSS:
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section_name = ".bss";
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flags = SEC_DATA | SEC_HAS_CONTENTS;
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break;
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case 0:
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goto no_more_sections;
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default:
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_bfd_error_handler
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/* xgettext:c-format */
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(_("%B: Unknown section type in a.out.adobe file: %x\n"),
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abfd, ext->e_type[0]);
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goto no_more_sections;
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}
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/* First one is called ".text" or whatever; subsequent ones are
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".text1", ".text2", ... */
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bfd_set_error (bfd_error_no_error);
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sect = bfd_make_section_with_flags (abfd, section_name, flags);
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trynum = 0;
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while (!sect)
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{
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if (bfd_get_error () != bfd_error_no_error)
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/* Some other error -- slide into the sunset. */
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return NULL;
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sprintf (try_again, "%s%d", section_name, ++trynum);
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sect = bfd_make_section_with_flags (abfd, try_again, flags);
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}
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/* Fix the name, if it is a sprintf'd name. */
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if (sect->name == try_again)
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{
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amt = strlen (sect->name);
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newname = bfd_zalloc (abfd, amt);
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if (newname == NULL)
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return NULL;
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strcpy (newname, sect->name);
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sect->name = newname;
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}
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/* Assumed big-endian. */
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sect->size = ((ext->e_size[0] << 8)
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| ext->e_size[1] << 8
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| ext->e_size[2]);
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sect->vma = H_GET_32 (abfd, ext->e_virtbase);
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sect->filepos = H_GET_32 (abfd, ext->e_filebase);
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/* FIXME XXX alignment? */
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/* Set relocation information for first section of each type. */
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if (trynum == 0)
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switch (ext->e_type[0])
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{
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case N_TEXT:
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sect->rel_filepos = N_TRELOFF (execp);
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sect->reloc_count = execp->a_trsize;
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break;
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case N_DATA:
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sect->rel_filepos = N_DRELOFF (execp);
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sect->reloc_count = execp->a_drsize;
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break;
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default:
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break;
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}
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}
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no_more_sections:
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adata (abfd).reloc_entry_size = sizeof (struct reloc_std_external);
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adata (abfd).symbol_entry_size = sizeof (struct external_nlist);
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adata (abfd).page_size = 1; /* Not applicable. */
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adata (abfd).segment_size = 1; /* Not applicable. */
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adata (abfd).exec_bytes_size = EXEC_BYTES_SIZE;
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return abfd->xvec;
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}
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static const bfd_target *
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aout_adobe_object_p (bfd *abfd)
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{
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struct internal_exec anexec;
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struct external_exec exec_bytes;
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char *targ;
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bfd_size_type amt = EXEC_BYTES_SIZE;
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if (bfd_bread (& exec_bytes, amt, abfd) != amt)
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{
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if (bfd_get_error () != bfd_error_system_call)
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bfd_set_error (bfd_error_wrong_format);
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return NULL;
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}
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anexec.a_info = H_GET_32 (abfd, exec_bytes.e_info);
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/* Normally we just compare for the magic number.
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However, a bunch of Adobe tools aren't fixed up yet; they generate
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files using ZMAGIC(!).
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If the environment variable GNUTARGET is set to "a.out.adobe", we will
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take just about any a.out file as an Adobe a.out file. FIXME! */
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if (N_BADMAG (&anexec))
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{
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targ = getenv ("GNUTARGET");
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if (targ && !strcmp (targ, aout_adobe_vec.name))
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/* Just continue anyway, if specifically set to this format. */
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;
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else
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{
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bfd_set_error (bfd_error_wrong_format);
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return NULL;
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}
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}
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aout_adobe_swap_exec_header_in (abfd, &exec_bytes, &anexec);
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return aout_32_some_aout_object_p (abfd, &anexec, aout_adobe_callback);
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}
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struct bout_data_struct
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{
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struct aoutdata a;
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struct internal_exec e;
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};
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static bfd_boolean
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aout_adobe_mkobject (bfd *abfd)
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{
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struct bout_data_struct *rawptr;
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bfd_size_type amt = sizeof (struct bout_data_struct);
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rawptr = bfd_zalloc (abfd, amt);
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if (rawptr == NULL)
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return FALSE;
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abfd->tdata.bout_data = rawptr;
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exec_hdr (abfd) = &rawptr->e;
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adata (abfd).reloc_entry_size = sizeof (struct reloc_std_external);
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adata (abfd).symbol_entry_size = sizeof (struct external_nlist);
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adata (abfd).page_size = 1; /* Not applicable. */
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adata (abfd).segment_size = 1; /* Not applicable. */
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adata (abfd).exec_bytes_size = EXEC_BYTES_SIZE;
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return TRUE;
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}
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static void
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aout_adobe_write_section (bfd *abfd ATTRIBUTE_UNUSED,
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sec_ptr sect ATTRIBUTE_UNUSED)
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{
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/* FIXME XXX. */
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}
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static bfd_boolean
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aout_adobe_write_object_contents (bfd *abfd)
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{
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struct external_exec swapped_hdr;
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static struct external_segdesc sentinel[1]; /* Initialized to zero. */
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asection *sect;
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bfd_size_type amt;
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exec_hdr (abfd)->a_info = ZMAGIC;
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/* Calculate text size as total of text sections, etc. */
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exec_hdr (abfd)->a_text = 0;
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exec_hdr (abfd)->a_data = 0;
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exec_hdr (abfd)->a_bss = 0;
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exec_hdr (abfd)->a_trsize = 0;
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exec_hdr (abfd)->a_drsize = 0;
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for (sect = abfd->sections; sect; sect = sect->next)
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{
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if (sect->flags & SEC_CODE)
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{
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exec_hdr (abfd)->a_text += sect->size;
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exec_hdr (abfd)->a_trsize += sect->reloc_count *
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sizeof (struct reloc_std_external);
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}
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else if (sect->flags & SEC_DATA)
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{
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exec_hdr (abfd)->a_data += sect->size;
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exec_hdr (abfd)->a_drsize += sect->reloc_count *
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sizeof (struct reloc_std_external);
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}
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else if (sect->flags & SEC_ALLOC && !(sect->flags & SEC_LOAD))
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exec_hdr (abfd)->a_bss += sect->size;
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}
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exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd)
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* sizeof (struct external_nlist);
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exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
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aout_adobe_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr);
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amt = EXEC_BYTES_SIZE;
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if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
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|| bfd_bwrite (& swapped_hdr, amt, abfd) != amt)
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return FALSE;
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/* Now write out the section information. Text first, data next, rest
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afterward. */
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for (sect = abfd->sections; sect; sect = sect->next)
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if (sect->flags & SEC_CODE)
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aout_adobe_write_section (abfd, sect);
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for (sect = abfd->sections; sect; sect = sect->next)
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if (sect->flags & SEC_DATA)
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aout_adobe_write_section (abfd, sect);
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for (sect = abfd->sections; sect; sect = sect->next)
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if (!(sect->flags & (SEC_CODE | SEC_DATA)))
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aout_adobe_write_section (abfd, sect);
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/* Write final `sentinel` section header (with type of 0). */
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amt = sizeof (*sentinel);
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if (bfd_bwrite (sentinel, amt, abfd) != amt)
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return FALSE;
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/* Now write out reloc info, followed by syms and strings. */
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if (bfd_get_symcount (abfd) != 0)
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{
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if (bfd_seek (abfd, (file_ptr) (N_SYMOFF (exec_hdr (abfd))), SEEK_SET)
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!= 0)
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return FALSE;
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if (! aout_32_write_syms (abfd))
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return FALSE;
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if (bfd_seek (abfd, (file_ptr) (N_TRELOFF (exec_hdr (abfd))), SEEK_SET)
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!= 0)
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return FALSE;
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for (sect = abfd->sections; sect; sect = sect->next)
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if (sect->flags & SEC_CODE)
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if (!aout_32_squirt_out_relocs (abfd, sect))
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return FALSE;
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if (bfd_seek (abfd, (file_ptr) (N_DRELOFF (exec_hdr (abfd))), SEEK_SET)
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!= 0)
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return FALSE;
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for (sect = abfd->sections; sect; sect = sect->next)
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if (sect->flags & SEC_DATA)
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if (!aout_32_squirt_out_relocs (abfd, sect))
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return FALSE;
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}
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return TRUE;
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}
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static bfd_boolean
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aout_adobe_set_section_contents (bfd *abfd,
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asection *section,
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const void * location,
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file_ptr offset,
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bfd_size_type count)
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{
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file_ptr section_start;
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sec_ptr sect;
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/* Set by bfd.c handler. */
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if (! abfd->output_has_begun)
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{
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/* Assign file offsets to sections. Text sections are first, and
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are contiguous. Then data sections. Everything else at the end. */
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section_start = N_TXTOFF (0);
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for (sect = abfd->sections; sect; sect = sect->next)
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{
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if (sect->flags & SEC_CODE)
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{
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sect->filepos = section_start;
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/* FIXME: Round to alignment. */
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section_start += sect->size;
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}
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}
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for (sect = abfd->sections; sect; sect = sect->next)
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{
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if (sect->flags & SEC_DATA)
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{
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sect->filepos = section_start;
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/* FIXME: Round to alignment. */
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section_start += sect->size;
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}
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}
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for (sect = abfd->sections; sect; sect = sect->next)
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{
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if (sect->flags & SEC_HAS_CONTENTS &&
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!(sect->flags & (SEC_CODE | SEC_DATA)))
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{
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sect->filepos = section_start;
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/* FIXME: Round to alignment. */
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section_start += sect->size;
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}
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}
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}
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/* Regardless, once we know what we're doing, we might as well get
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going. */
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if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0)
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return FALSE;
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if (count == 0)
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return TRUE;
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return bfd_bwrite (location, count, abfd) == count;
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}
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static bfd_boolean
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aout_adobe_set_arch_mach (bfd *abfd,
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enum bfd_architecture arch,
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unsigned long machine)
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{
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if (! bfd_default_set_arch_mach (abfd, arch, machine))
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return FALSE;
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if (arch == bfd_arch_unknown
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|| arch == bfd_arch_m68k)
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return TRUE;
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return FALSE;
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}
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static int
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aout_adobe_sizeof_headers (bfd *ignore_abfd ATTRIBUTE_UNUSED,
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struct bfd_link_info *info ATTRIBUTE_UNUSED)
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{
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return sizeof (struct internal_exec);
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}
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/* Build the transfer vector for Adobe A.Out files. */
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#define aout_32_find_line _bfd_nosymbols_find_line
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#define aout_32_get_symbol_version_string _bfd_nosymbols_get_symbol_version_string
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#define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
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#define aout_32_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
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#define aout_32_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
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#define aout_32_close_and_cleanup aout_32_bfd_free_cached_info
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#define aout_32_set_arch_mach aout_adobe_set_arch_mach
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#define aout_32_set_section_contents aout_adobe_set_section_contents
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#define aout_32_sizeof_headers aout_adobe_sizeof_headers
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#define aout_32_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
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#define aout_32_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
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#define aout_32_bfd_relax_section bfd_generic_relax_section
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#define aout_32_bfd_gc_sections bfd_generic_gc_sections
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#define aout_32_bfd_lookup_section_flags bfd_generic_lookup_section_flags
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#define aout_32_bfd_merge_sections bfd_generic_merge_sections
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#define aout_32_bfd_is_group_section bfd_generic_is_group_section
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#define aout_32_bfd_discard_group bfd_generic_discard_group
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#define aout_32_section_already_linked _bfd_generic_section_already_linked
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#define aout_32_bfd_define_common_symbol bfd_generic_define_common_symbol
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#define aout_32_bfd_define_start_stop bfd_generic_define_start_stop
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#define aout_32_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
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#define aout_32_bfd_link_add_symbols _bfd_generic_link_add_symbols
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#define aout_32_bfd_link_just_syms _bfd_generic_link_just_syms
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#define aout_32_bfd_copy_link_hash_symbol_type \
|
||
_bfd_generic_copy_link_hash_symbol_type
|
||
#define aout_32_bfd_final_link _bfd_generic_final_link
|
||
#define aout_32_bfd_link_split_section _bfd_generic_link_split_section
|
||
#define aout_32_bfd_link_check_relocs _bfd_generic_link_check_relocs
|
||
#define aout_32_set_reloc _bfd_generic_set_reloc
|
||
|
||
const bfd_target aout_adobe_vec =
|
||
{
|
||
"a.out.adobe", /* Name. */
|
||
bfd_target_aout_flavour,
|
||
BFD_ENDIAN_BIG, /* Data byte order is unknown (big assumed). */
|
||
BFD_ENDIAN_BIG, /* Header byte order is big. */
|
||
(HAS_RELOC | EXEC_P | /* Object flags. */
|
||
HAS_LINENO | HAS_DEBUG |
|
||
HAS_SYMS | HAS_LOCALS | WP_TEXT ),
|
||
/* section flags */
|
||
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_DATA | SEC_RELOC),
|
||
'_', /* Symbol leading char. */
|
||
' ', /* AR_pad_char. */
|
||
16, /* AR_max_namelen. */
|
||
0, /* 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. */
|
||
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
|
||
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
|
||
bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* Headers. */
|
||
|
||
{_bfd_dummy_target, aout_adobe_object_p, /* bfd_check_format. */
|
||
bfd_generic_archive_p, _bfd_dummy_target},
|
||
{bfd_false, aout_adobe_mkobject, /* bfd_set_format. */
|
||
_bfd_generic_mkarchive, bfd_false},
|
||
{bfd_false, aout_adobe_write_object_contents,/* bfd_write_contents. */
|
||
_bfd_write_archive_contents, bfd_false},
|
||
|
||
BFD_JUMP_TABLE_GENERIC (aout_32),
|
||
BFD_JUMP_TABLE_COPY (_bfd_generic),
|
||
BFD_JUMP_TABLE_CORE (_bfd_nocore),
|
||
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
|
||
BFD_JUMP_TABLE_SYMBOLS (aout_32),
|
||
BFD_JUMP_TABLE_RELOCS (aout_32),
|
||
BFD_JUMP_TABLE_WRITE (aout_32),
|
||
BFD_JUMP_TABLE_LINK (aout_32),
|
||
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
|
||
|
||
NULL,
|
||
|
||
NULL
|
||
};
|