19990502 sourceware importbinu_ss_19990502

1 files changed, 236 insertions, 0 deletions

diff --git a/bfd/aout-encap.c b/bfd/aout-encap.c
new file mode 100644
index 0000000..c25f9037
--- /dev/null
+++ b/bfd/aout-encap.c
@@ -0,0 +1,236 @@
+/* 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"