392 lines
12 KiB
C
392 lines
12 KiB
C
/* BFD back-end for os9000 i386 binaries.
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Copyright 1990, 1991, 1992, 1993 1994 Free Software Foundation, Inc.
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Written by Cygnus Support.
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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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "bfdlink.h"
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#include "libaout.h" /* BFD a.out internal data structures */
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#include "os9k.h"
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static bfd_target *os9k_callback PARAMS ((bfd *));
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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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boolean
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os9k_swap_exec_header_in (abfd, raw_bytes, execp)
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bfd *abfd;
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mh_com *raw_bytes;
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struct internal_exec *execp;
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{
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mh_com *bytes = (mh_com *) raw_bytes;
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unsigned int dload, dmemsize, dmemstart;
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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 = bfd_h_get_16 (abfd, bytes->m_sync);
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execp->a_syms = 0;
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execp->a_entry = bfd_h_get_32 (abfd, bytes->m_exec);
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execp->a_talign = 2;
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execp->a_dalign = 2;
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execp->a_balign = 2;
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dload = bfd_h_get_32 (abfd, bytes->m_idata);
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execp->a_data = dload + 8;
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if (bfd_seek (abfd, (file_ptr) dload, SEEK_SET) != 0
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|| (bfd_read (&dmemstart, sizeof (dmemstart), 1, abfd)
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!= sizeof (dmemstart))
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|| (bfd_read (&dmemsize, sizeof (dmemsize), 1, abfd)
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!= sizeof (dmemsize)))
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return false;
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execp->a_tload = 0;
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execp->a_dload = bfd_h_get_32 (abfd, (unsigned char *) &dmemstart);
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execp->a_text = dload - execp->a_tload;
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execp->a_data = bfd_h_get_32 (abfd, (unsigned char *) &dmemsize);
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execp->a_bss = bfd_h_get_32 (abfd, bytes->m_data) - execp->a_data;
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execp->a_trsize = 0;
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execp->a_drsize = 0;
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return true;
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}
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#if 0
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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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PROTO (void, os9k_swap_exec_header_out,
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(bfd * abfd,
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struct internal_exec * execp,
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struct mh_com * raw_bytes));
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void
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os9k_swap_exec_header_out (abfd, execp, raw_bytes)
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bfd *abfd;
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struct internal_exec *execp;
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mh_com *raw_bytes;
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{
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mh_com *bytes = (mh_com *) raw_bytes;
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/* Now fill in fields in the raw data, from the fields in the exec struct. */
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bfd_h_put_32 (abfd, execp->a_info, bytes->e_info);
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bfd_h_put_32 (abfd, execp->a_text, bytes->e_text);
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bfd_h_put_32 (abfd, execp->a_data, bytes->e_data);
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bfd_h_put_32 (abfd, execp->a_bss, bytes->e_bss);
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bfd_h_put_32 (abfd, execp->a_syms, bytes->e_syms);
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bfd_h_put_32 (abfd, execp->a_entry, bytes->e_entry);
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bfd_h_put_32 (abfd, execp->a_trsize, bytes->e_trsize);
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bfd_h_put_32 (abfd, execp->a_drsize, bytes->e_drsize);
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bfd_h_put_32 (abfd, execp->a_tload, bytes->e_tload);
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bfd_h_put_32 (abfd, execp->a_dload, bytes->e_dload);
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bytes->e_talign[0] = execp->a_talign;
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bytes->e_dalign[0] = execp->a_dalign;
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bytes->e_balign[0] = execp->a_balign;
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bytes->e_relaxable[0] = execp->a_relaxable;
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}
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#endif /* 0 */
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static bfd_target *
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os9k_object_p (abfd)
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bfd *abfd;
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{
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struct internal_exec anexec;
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mh_com exec_bytes;
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if (bfd_read ((PTR) & exec_bytes, MHCOM_BYTES_SIZE, 1, abfd)
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!= MHCOM_BYTES_SIZE)
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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 0;
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}
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anexec.a_info = bfd_h_get_16 (abfd, exec_bytes.m_sync);
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if (N_BADMAG (anexec))
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{
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bfd_set_error (bfd_error_wrong_format);
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return 0;
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}
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if (! os9k_swap_exec_header_in (abfd, &exec_bytes, &anexec))
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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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return aout_32_some_aout_object_p (abfd, &anexec, os9k_callback);
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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 bfd_target *
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os9k_callback (abfd)
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bfd *abfd;
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{
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struct internal_exec *execp = exec_hdr (abfd);
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unsigned long bss_start;
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/* Architecture and machine type */
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bfd_set_arch_mach (abfd, bfd_arch_i386, 0);
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/* The positions of the string table and symbol table. */
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obj_str_filepos (abfd) = 0;
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obj_sym_filepos (abfd) = 0;
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/* The alignments of the sections */
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obj_textsec (abfd)->alignment_power = execp->a_talign;
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obj_datasec (abfd)->alignment_power = execp->a_dalign;
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obj_bsssec (abfd)->alignment_power = execp->a_balign;
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/* The starting addresses of the sections. */
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obj_textsec (abfd)->vma = execp->a_tload;
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obj_datasec (abfd)->vma = execp->a_dload;
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/* And reload the sizes, since the aout module zaps them */
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obj_textsec (abfd)->_raw_size = execp->a_text;
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bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section */
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obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign);
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/* The file positions of the sections */
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obj_textsec (abfd)->filepos = execp->a_entry;
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obj_datasec (abfd)->filepos = execp->a_dload;
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/* The file positions of the relocation info ***
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obj_textsec (abfd)->rel_filepos = N_TROFF(*execp);
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obj_datasec (abfd)->rel_filepos = N_DROFF(*execp);
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*/
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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 = MHCOM_BYTES_SIZE;
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return abfd->xvec;
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}
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#if 0
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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 boolean
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os9k_mkobject (abfd)
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bfd *abfd;
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{
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struct bout_data_struct *rawptr;
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rawptr = (struct bout_data_struct *) bfd_zalloc (abfd, sizeof (struct bout_data_struct));
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if (rawptr == NULL)
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{
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bfd_set_error (bfd_error_no_memory);
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return false;
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}
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abfd->tdata.bout_data = rawptr;
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exec_hdr (abfd) = &rawptr->e;
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/* For simplicity's sake we just make all the sections right here. */
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obj_textsec (abfd) = (asection *) NULL;
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obj_datasec (abfd) = (asection *) NULL;
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obj_bsssec (abfd) = (asection *) NULL;
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bfd_make_section (abfd, ".text");
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bfd_make_section (abfd, ".data");
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bfd_make_section (abfd, ".bss");
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return true;
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}
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static boolean
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os9k_write_object_contents (abfd)
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bfd *abfd;
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{
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struct external_exec swapped_hdr;
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exec_hdr (abfd)->a_info = BMAGIC;
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exec_hdr (abfd)->a_text = obj_textsec (abfd)->_raw_size;
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exec_hdr (abfd)->a_data = obj_datasec (abfd)->_raw_size;
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exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->_raw_size;
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exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist);
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exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
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exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) *
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sizeof (struct relocation_info));
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exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) *
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sizeof (struct relocation_info));
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exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power;
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exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power;
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exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power;
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exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma;
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exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma;
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bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr);
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if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
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|| (bfd_write ((PTR) & swapped_hdr, 1, EXEC_BYTES_SIZE, abfd)
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!= EXEC_BYTES_SIZE))
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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_TROFF (*exec_hdr (abfd))), SEEK_SET)
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!= 0)
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return false;
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if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd)))
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return false;
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if (bfd_seek (abfd, (file_ptr) (N_DROFF (*exec_hdr (abfd))), SEEK_SET)
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!= 0)
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return false;
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if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd)))
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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 boolean
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os9k_set_section_contents (abfd, section, location, offset, count)
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bfd *abfd;
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sec_ptr section;
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unsigned char *location;
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file_ptr offset;
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int count;
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{
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if (abfd->output_has_begun == false)
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{ /* set by bfd.c handler */
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if ((obj_textsec (abfd) == NULL) || (obj_datasec (abfd) == NULL) /*||
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(obj_textsec (abfd)->_cooked_size == 0) || (obj_datasec (abfd)->_cooked_size == 0)*/ )
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{
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bfd_set_error (bfd_error_invalid_operation);
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return false;
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}
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obj_textsec (abfd)->filepos = sizeof (struct internal_exec);
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obj_datasec (abfd)->filepos = obj_textsec (abfd)->filepos
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+ obj_textsec (abfd)->_raw_size;
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}
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/* regardless, once we know what we're doing, we might as well get 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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{
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return (bfd_write ((PTR) location, 1, count, abfd) == count) ? true : false;
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}
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return true;
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}
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#endif /* 0 */
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static int
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os9k_sizeof_headers (ignore_abfd, ignore)
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bfd *ignore_abfd;
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boolean ignore;
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{
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return sizeof (struct internal_exec);
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}
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/***********************************************************************/
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/* We don't have core files. */
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#define aout_32_core_file_failing_command _bfd_dummy_core_file_failing_command
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#define aout_32_core_file_failing_signal _bfd_dummy_core_file_failing_signal
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#define aout_32_core_file_matches_executable_p \
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_bfd_dummy_core_file_matches_executable_p
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/* We use BSD-Unix generic archive files. */
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#define aout_32_openr_next_archived_file bfd_generic_openr_next_archived_file
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#define aout_32_generic_stat_arch_elt bfd_generic_stat_arch_elt
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#define aout_32_slurp_armap bfd_slurp_bsd_armap
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#define aout_32_slurp_extended_name_table _bfd_slurp_extended_name_table
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#define aout_32_write_armap bsd_write_armap
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#define aout_32_truncate_arname bfd_bsd_truncate_arname
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/* We override these routines from the usual a.out file routines. */
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#define aout_32_canonicalize_reloc bfd_canonicalize_reloc
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#define aout_32_get_reloc_upper_bound bfd_get_reloc_upper_bound
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#define aout_32_set_section_contents bfd_set_section_contents
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#define aout_32_set_arch_mach bfd_default_set_arch_mach
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#define aout_32_sizeof_headers os9k_sizeof_headers
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#define aout_32_bfd_debug_info_start bfd_void
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#define aout_32_bfd_debug_info_end bfd_void
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#define aout_32_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
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#define aout_32_bfd_make_debug_symbol \
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((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
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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_final_link _bfd_generic_final_link
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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_bfd_relax_section bfd_generic_relax_section
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#define aout_32_bfd_reloc_type_lookup \
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((CONST struct reloc_howto_struct *(*) PARAMS \
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((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)
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#define aout_32_close_and_cleanup aout_32_bfd_free_cached_info
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bfd_target i386os9k_vec =
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{
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"i386os9k", /* name */
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bfd_target_os9k_flavour,
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false, /* data byte order is little */
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false, /* hdr byte order is big */
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(HAS_RELOC | EXEC_P | WP_TEXT), /* object flags */
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(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD), /* section flags */
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0, /* symbol leading char */
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' ', /* ar_pad_char */
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16, /* ar_max_namelen */
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2, /* minumum alignment power */
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bfd_getl64, bfd_getl_signed_64, bfd_putl64,
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bfd_getl32, bfd_getl_signed_32, bfd_putl32,
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bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
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bfd_getl64, bfd_getl_signed_64, bfd_putl64,
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bfd_getl32, bfd_getl_signed_32, bfd_putl32,
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bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
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{_bfd_dummy_target, os9k_object_p, /* bfd_check_format */
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bfd_generic_archive_p, _bfd_dummy_target},
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{bfd_false, bfd_false, /* bfd_set_format */
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_bfd_generic_mkarchive, bfd_false},
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{bfd_false, bfd_false, /* bfd_write_contents */
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_bfd_write_archive_contents, bfd_false},
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JUMP_TABLE (aout_32),
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(PTR) 0,
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};
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