| /* BFD back-end for a.out files encapsulated with COFF headers. |
| Copyright (C) 1990, 1991 Free Software Foundation, Inc. |
| |
| 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 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. */ |
| |
| /* THIS MODULE IS NOT FINISHED. IT PROBABLY DOESN'T EVEN COMPILE. */ |
| |
| #if 0 |
| #define TARGET_PAGE_SIZE 4096 |
| #define SEGMENT_SIZE TARGET_PAGE_SIZE |
| #define TEXT_START_ADDR 0 |
| #define BYTES_IN_WORD 4 |
| #endif |
| |
| #include "bfd.h" |
| #include <sysdep.h> |
| #include "libbfd.h" |
| #include <aout/aout64.h> |
| #include "aout/stab_gnu.h" |
| #include "aout/ar.h" |
| #include "libaout.h" /* BFD a.out internal data structures */ |
| |
| const bfd_target *encap_real_callback (); |
| |
| const bfd_target * |
| encap_object_p (abfd) |
| bfd *abfd; |
| { |
| unsigned char magicbuf[4]; /* Raw bytes of magic number from file */ |
| unsigned long magic; /* Swapped magic number */ |
| short coff_magic; |
| struct external_exec exec_bytes; |
| struct internal_exec exec; |
| |
| if (bfd_read ((PTR)magicbuf, 1, sizeof (magicbuf), abfd) != |
| sizeof (magicbuf)) |
| { |
| if (bfd_get_error () != bfd_error_system_call) |
| bfd_set_error (bfd_error_wrong_format); |
| return 0; |
| } |
| |
| coff_magic = bfd_h_get_16 (abfd, magicbuf); |
| if (coff_magic != COFF_MAGIC) |
| return 0; /* Not an encap coff file */ |
| |
| __header_offset_temp==COFF_MAGIC ? sizeof(struct coffheader) : 0) |
| (fseek ((f), HEADER_OFFSET((f)), 1)) |
| |
| magic = bfd_h_get_32 (abfd, magicbuf); |
| |
| if (N_BADMAG (*((struct internal_exec *) &magic))) return 0; |
| |
| struct external_exec exec_bytes; |
| if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd) |
| != EXEC_BYTES_SIZE) { |
| if (bfd_get_error () != bfd_error_system_call) |
| bfd_set_error (bfd_error_wrong_format); |
| return 0; |
| } |
| NAME(aout,swap_exec_header_in)(abfd, &exec_bytes, &exec); |
| |
| return aout_32_some_aout_object_p (abfd, &exec, encap_realcallback); |
| } |
| |
| /* Finish up the reading of a encapsulated-coff a.out file header */ |
| const bfd_target * |
| encap_real_callback (abfd) |
| bfd *abfd; |
| { |
| struct internal_exec *execp = exec_hdr (abfd); |
| |
| MY(callback)(abfd, execp); |
| |
| /* If we have a coff header, it can give us better values for |
| text_start and exec_data_start. This is particularly useful |
| for remote debugging of embedded systems. */ |
| if (N_FLAGS(exec_aouthdr) & N_FLAGS_COFF_ENCAPSULATE) |
| { |
| struct coffheader ch; |
| int val; |
| val = lseek (execchan, -(sizeof (AOUTHDR) + sizeof (ch)), 1); |
| if (val == -1) |
| perror_with_name (filename); |
| val = myread (execchan, &ch, sizeof (ch)); |
| if (val < 0) |
| perror_with_name (filename); |
| text_start = ch.text_start; |
| exec_data_start = ch.data_start; |
| } else |
| { |
| text_start = |
| IS_OBJECT_FILE (exec_aouthdr) ? 0 : N_TXTADDR (exec_aouthdr); |
| exec_data_start = IS_OBJECT_FILE (exec_aouthdr) |
| ? exec_aouthdr.a_text : N_DATADDR (exec_aouthdr); |
| } |
| |
| /* Determine the architecture and machine type of the object file. */ |
| bfd_default_set_arch_mach(abfd, bfd_arch_m68k, 0); /* FIXME */ |
| |
| return abfd->xvec; |
| } |
| |
| /* Write an object file in Encapsulated COFF format. |
| Section contents have already been written. We write the |
| file header, symbols, and relocation. */ |
| |
| boolean |
| encap_write_object_contents (abfd) |
| bfd *abfd; |
| { |
| bfd_size_type data_pad = 0; |
| struct external_exec exec_bytes; |
| struct internal_exec *execp = exec_hdr (abfd); |
| |
| /****** FIXME: Fragments from the old GNU LD program for dealing with |
| encap coff. */ |
| struct coffheader coffheader; |
| int need_coff_header; |
| |
| /* Determine whether to count the header as part of |
| the text size, and initialize the text size accordingly. |
| This depends on the kind of system and on the output format selected. */ |
| |
| N_SET_MAGIC (outheader, magic); |
| #ifdef INITIALIZE_HEADER |
| INITIALIZE_HEADER; |
| #endif |
| |
| text_size = sizeof (struct exec); |
| #ifdef COFF_ENCAPSULATE |
| if (relocatable_output == 0 && file_table[0].just_syms_flag == 0) |
| { |
| need_coff_header = 1; |
| /* set this flag now, since it will change the values of N_TXTOFF, etc */ |
| N_SET_FLAGS (outheader, aout_backend_info (abfd)->exec_hdr_flags); |
| text_size += sizeof (struct coffheader); |
| } |
| #endif |
| |
| #ifdef COFF_ENCAPSULATE |
| if (need_coff_header) |
| { |
| /* We are encapsulating BSD format within COFF format. */ |
| struct coffscn *tp, *dp, *bp; |
| |
| tp = &coffheader.scns[0]; |
| dp = &coffheader.scns[1]; |
| bp = &coffheader.scns[2]; |
| |
| strcpy (tp->s_name, ".text"); |
| tp->s_paddr = text_start; |
| tp->s_vaddr = text_start; |
| tp->s_size = text_size; |
| tp->s_scnptr = sizeof (struct coffheader) + sizeof (struct exec); |
| tp->s_relptr = 0; |
| tp->s_lnnoptr = 0; |
| tp->s_nreloc = 0; |
| tp->s_nlnno = 0; |
| tp->s_flags = 0x20; |
| strcpy (dp->s_name, ".data"); |
| dp->s_paddr = data_start; |
| dp->s_vaddr = data_start; |
| dp->s_size = data_size; |
| dp->s_scnptr = tp->s_scnptr + tp->s_size; |
| dp->s_relptr = 0; |
| dp->s_lnnoptr = 0; |
| dp->s_nreloc = 0; |
| dp->s_nlnno = 0; |
| dp->s_flags = 0x40; |
| strcpy (bp->s_name, ".bss"); |
| bp->s_paddr = dp->s_vaddr + dp->s_size; |
| bp->s_vaddr = bp->s_paddr; |
| bp->s_size = bss_size; |
| bp->s_scnptr = 0; |
| bp->s_relptr = 0; |
| bp->s_lnnoptr = 0; |
| bp->s_nreloc = 0; |
| bp->s_nlnno = 0; |
| bp->s_flags = 0x80; |
| |
| coffheader.f_magic = COFF_MAGIC; |
| coffheader.f_nscns = 3; |
| /* store an unlikely time so programs can |
| * tell that there is a bsd header |
| */ |
| coffheader.f_timdat = 1; |
| coffheader.f_symptr = 0; |
| coffheader.f_nsyms = 0; |
| coffheader.f_opthdr = 28; |
| coffheader.f_flags = 0x103; |
| /* aouthdr */ |
| coffheader.magic = ZMAGIC; |
| coffheader.vstamp = 0; |
| coffheader.tsize = tp->s_size; |
| coffheader.dsize = dp->s_size; |
| coffheader.bsize = bp->s_size; |
| coffheader.entry = outheader.a_entry; |
| coffheader.text_start = tp->s_vaddr; |
| coffheader.data_start = dp->s_vaddr; |
| } |
| #endif |
| |
| #ifdef COFF_ENCAPSULATE |
| if (need_coff_header) |
| mywrite (&coffheader, sizeof coffheader, 1, outdesc); |
| #endif |
| |
| #ifndef COFF_ENCAPSULATE |
| padfile (N_TXTOFF (outheader) - sizeof outheader, outdesc); |
| #endif |
| |
| text_size -= N_TXTOFF (outheader); |
| WRITE_HEADERS(abfd, execp); |
| return true; |
| } |
| |
| #define MY_write_object_content encap_write_object_contents |
| #define MY_object_p encap_object_p |
| #define MY_exec_hdr_flags N_FLAGS_COFF_ENCAPSULATE |
| |
| #include "aout-target.h" |