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598 lines
16 KiB
C
598 lines
16 KiB
C
/* evax-egsd.c -- BFD back-end for ALPHA EVAX (openVMS/Alpha) files.
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Copyright 1996, 1997 Free Software Foundation Inc.
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go and read the openVMS linker manual (esp. appendix B)
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if you don't know what's going on here :-)
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Written by Klaus K"ampf (kkaempf@progis.de)
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of proGIS Softwareentwicklung, Aachen, Germany
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include <stdio.h>
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#include <ctype.h>
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#include "bfd.h"
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#include "sysdep.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "evax.h"
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/*-----------------------------------------------------------------------------*/
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/* sections every evax object file has */
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#define EVAX_ABS_NAME "$ABS$"
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#define EVAX_CODE_NAME "$CODE$"
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#define EVAX_LINK_NAME "$LINK$"
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#define EVAX_DATA_NAME "$DATA$"
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#define EVAX_BSS_NAME "$BSS$"
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#define EVAX_READONLYADDR_NAME "$READONLY_ADDR$"
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#define EVAX_READONLY_NAME "$READONLY$"
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#define EVAX_LITERAL_NAME "$LITERAL$"
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#define EVAX_COMMON_NAME "$COMMON$"
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#define EVAX_LOCAL_NAME "$LOCAL$"
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struct sec_flags_struct {
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char *name; /* name of section */
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int eflags_always;
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flagword flags_always; /* flags we set always */
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int eflags_hassize;
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flagword flags_hassize; /* flags we set if the section has a size > 0 */
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};
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/* These flags are deccrtl/vaxcrtl (openVMS 6.2) compatible */
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static struct sec_flags_struct evax_section_flags[] = {
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{ EVAX_ABS_NAME,
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(EGPS_S_V_SHR),
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(SEC_DATA),
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(EGPS_S_V_SHR),
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(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
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{ EVAX_CODE_NAME,
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(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_EXE),
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(SEC_CODE),
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(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_EXE),
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(SEC_IN_MEMORY|SEC_CODE|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
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{ EVAX_LITERAL_NAME,
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(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_RD|EGPS_S_V_NOMOD),
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(SEC_DATA|SEC_READONLY),
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(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_RD),
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(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_READONLY|SEC_LOAD) },
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{ EVAX_LINK_NAME,
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(EGPS_S_V_REL|EGPS_S_V_RD),
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(SEC_DATA|SEC_READONLY),
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(EGPS_S_V_REL|EGPS_S_V_RD),
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(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_READONLY|SEC_LOAD) },
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{ EVAX_DATA_NAME,
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(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT|EGPS_S_V_NOMOD),
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(SEC_DATA),
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(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
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(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
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{ EVAX_BSS_NAME,
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(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT|EGPS_S_V_NOMOD),
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(SEC_NO_FLAGS),
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(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT|EGPS_S_V_NOMOD),
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(SEC_IN_MEMORY|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
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{ EVAX_READONLYADDR_NAME,
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(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_RD),
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(SEC_DATA|SEC_READONLY),
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(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_RD),
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(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_READONLY|SEC_LOAD) },
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{ EVAX_READONLY_NAME,
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(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_RD|EGPS_S_V_NOMOD),
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(SEC_DATA|SEC_READONLY),
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(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_RD),
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(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_READONLY|SEC_LOAD) },
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{ EVAX_LOCAL_NAME,
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(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
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(SEC_DATA),
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(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
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(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
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{ NULL,
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(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
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(SEC_DATA),
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(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
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(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) }
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};
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/* Retrieve bfd section flags by name and size */
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static flagword
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evax_secflag_by_name(name, size)
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char *name;
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int size;
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{
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int i = 0;
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while (evax_section_flags[i].name != NULL)
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{
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if (strcmp (name, evax_section_flags[i].name) == 0)
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{
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if (size > 0)
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return evax_section_flags[i].flags_hassize;
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else
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return evax_section_flags[i].flags_always;
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}
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i++;
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}
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if (size > 0)
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return evax_section_flags[i].flags_hassize;
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return evax_section_flags[i].flags_always;
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}
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/* Retrieve evax section flags by name and size */
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static flagword
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evax_esecflag_by_name(name, size)
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char *name;
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int size;
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{
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int i = 0;
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while (evax_section_flags[i].name != NULL)
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{
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if (strcmp (name, evax_section_flags[i].name) == 0)
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{
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if (size > 0)
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return evax_section_flags[i].eflags_hassize;
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else
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return evax_section_flags[i].eflags_always;
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}
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i++;
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}
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if (size > 0)
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return evax_section_flags[i].eflags_hassize;
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return evax_section_flags[i].eflags_always;
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}
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/*-----------------------------------------------------------------------------*/
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#if EVAX_DEBUG
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/* debug */
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struct flagdescstruct { char *name; flagword value; };
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/* Convert flag to printable string */
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static char *
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flag2str(flagdesc, flags)
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struct flagdescstruct *flagdesc;
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flagword flags;
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{
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static char res[64];
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int next = 0;
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res[0] = 0;
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while (flagdesc->name != NULL)
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{
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if ((flags & flagdesc->value) != 0)
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{
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if (next)
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strcat(res, ",");
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else
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next = 1;
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strcat (res, flagdesc->name);
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}
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flagdesc++;
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}
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return res;
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}
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#endif
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/*-----------------------------------------------------------------------------*/
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/* input routines */
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/* Process EGSD record
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return 0 on success, -1 on error */
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int
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_bfd_evax_slurp_egsd (abfd)
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bfd *abfd;
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{
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#if EVAX_DEBUG
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static struct flagdescstruct gpsflagdesc[] =
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{
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{ "PIC", 0x0001 },
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{ "LIB", 0x0002 },
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{ "OVR", 0x0004 },
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{ "REL", 0x0008 },
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{ "GBL", 0x0010 },
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{ "SHR", 0x0020 },
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{ "EXE", 0x0040 },
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{ "RD", 0x0080 },
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{ "WRT", 0x0100 },
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{ "VEC", 0x0200 },
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{ "NOMOD", 0x0400 },
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{ "COM", 0x0800 },
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{ NULL, 0 }
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};
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static struct flagdescstruct gsyflagdesc[] =
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{
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{ "WEAK", 0x0001 },
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{ "DEF", 0x0002 },
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{ "UNI", 0x0004 },
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{ "REL", 0x0008 },
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{ "COMM", 0x0010 },
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{ "VECEP", 0x0020 },
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{ "NORM", 0x0040 },
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{ NULL, 0 }
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};
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#endif
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int gsd_type, gsd_size;
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asection *section;
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unsigned char *evax_rec;
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flagword new_flags, old_flags;
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char *name;
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asymbol *symbol;
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evax_symbol_entry *entry;
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unsigned long base_addr;
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unsigned long align_addr;
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#if EVAX_DEBUG
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evax_debug (2, "EGSD\n");
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#endif
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PRIV(evax_rec) += 8; /* skip type, size, l_temp */
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PRIV(rec_size) -= 8;
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/* calculate base address for each section */
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base_addr = 0L;
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abfd->symcount = 0;
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while (PRIV(rec_size) > 0)
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{
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evax_rec = PRIV(evax_rec);
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_bfd_evax_get_header_values (abfd, evax_rec, &gsd_type, &gsd_size);
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switch (gsd_type)
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{
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case EGSD_S_C_PSC:
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{
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/* program section definition */
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name = _bfd_evax_save_counted_string ((char *)evax_rec+12);
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section = bfd_make_section (abfd, name);
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if (!section)
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return -1;
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old_flags = bfd_getl16 (evax_rec + 6);
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section->_raw_size = bfd_getl32 (evax_rec + 8); /* allocation */
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new_flags = evax_secflag_by_name (name, (int) section->_raw_size);
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if (old_flags & EGPS_S_V_REL)
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new_flags |= SEC_RELOC;
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if (!bfd_set_section_flags (abfd, section, new_flags))
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return -1;
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section->alignment_power = evax_rec[4];
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align_addr = (1 << section->alignment_power);
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if ((base_addr % align_addr) != 0)
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base_addr += (align_addr - (base_addr % align_addr));
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section->vma = (bfd_vma)base_addr;
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base_addr += section->_raw_size;
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section->contents = ((unsigned char *)
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bfd_malloc (section->_raw_size));
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if (section->contents == NULL)
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return -1;
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memset (section->contents, 0, (size_t) section->_raw_size);
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section->_cooked_size = section->_raw_size;
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#if EVAX_DEBUG
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evax_debug(3, "egsd psc %d (%s, flags %04x=%s) ",
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section->index, name, old_flags, flag2str(gpsflagdesc, old_flags));
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evax_debug(3, "%d bytes at 0x%08lx (mem %p)\n",
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section->_raw_size, section->vma, section->contents);
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#endif
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}
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break;
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case EGSD_S_C_SYM:
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{
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/* symbol specification (definition or reference) */
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symbol = _bfd_evax_make_empty_symbol (abfd);
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if (symbol == 0)
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return -1;
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old_flags = bfd_getl16 (evax_rec + 6);
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new_flags = BSF_NO_FLAGS;
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if (old_flags & EGSY_S_V_WEAK)
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new_flags |= BSF_WEAK;
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if (evax_rec[6] & EGSY_S_V_DEF) /* symbol definition */
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{
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symbol->name =
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_bfd_evax_save_counted_string ((char *)evax_rec+32);
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if (old_flags & EGSY_S_V_NORM)
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{ /* proc def */
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new_flags |= BSF_FUNCTION;
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}
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symbol->value = bfd_getl64 (evax_rec+8);
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symbol->section = (asection *)((unsigned long) bfd_getl32 (evax_rec+28));
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#if EVAX_DEBUG
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evax_debug(3, "egsd sym def #%d (%s, %d, %04x=%s)\n", abfd->symcount,
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symbol->name, (int)symbol->section, old_flags, flag2str(gsyflagdesc, old_flags));
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#endif
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}
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else /* symbol reference */
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{
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symbol->name =
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_bfd_evax_save_counted_string ((char *)evax_rec+8);
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#if EVAX_DEBUG
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evax_debug(3, "egsd sym ref #%d (%s, %04x=%s)\n", abfd->symcount,
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symbol->name, old_flags, flag2str(gsyflagdesc, old_flags));
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#endif
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symbol->section = bfd_make_section (abfd, BFD_UND_SECTION_NAME);
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}
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symbol->flags = new_flags;
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/* save symbol in evax_symbol_table */
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entry = (evax_symbol_entry *) bfd_hash_lookup (PRIV(evax_symbol_table), symbol->name, true, false);
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if (entry == (evax_symbol_entry *)NULL)
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{
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bfd_set_error (bfd_error_no_memory);
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return -1;
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}
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if (entry->symbol != (asymbol *)NULL)
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{ /* FIXME ?, DEC C generates this */
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#if EVAX_DEBUG
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evax_debug(3, "EGSD_S_C_SYM: duplicate \"%s\"\n", symbol->name);
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#endif
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}
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else
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{
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entry->symbol = symbol;
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PRIV(egsd_sym_count)++;
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abfd->symcount++;
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}
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}
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break;
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case EGSD_S_C_IDC:
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break;
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default:
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(*_bfd_error_handler) ("unknown egsd subtype %d", gsd_type);
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bfd_set_error (bfd_error_bad_value);
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return -1;
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} /* switch */
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PRIV(rec_size) -= gsd_size;
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PRIV(evax_rec) += gsd_size;
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} /* while (recsize > 0) */
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if (abfd->symcount > 0)
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abfd->flags |= HAS_SYMS;
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return 0;
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}
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/*-----------------------------------------------------------------------------*/
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/* output routines */
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/* Write section and symbol directory of bfd abfd */
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int
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_bfd_evax_write_egsd (abfd)
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bfd *abfd;
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{
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asection *section;
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asymbol *symbol;
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int symnum;
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int last_index = -1;
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char dummy_name[10];
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char *sname;
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flagword new_flags, old_flags;
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char *nptr, *uptr;
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#if EVAX_DEBUG
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evax_debug (2, "evax_write_egsd(%p)\n", abfd);
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#endif
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/* output sections */
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section = abfd->sections;
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#if EVAX_DEBUG
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evax_debug (3, "%d sections found\n", abfd->section_count);
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#endif
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/* egsd is quadword aligned */
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_bfd_evax_output_alignment (abfd, 8);
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_bfd_evax_output_begin (abfd, EOBJ_S_C_EGSD, -1);
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_bfd_evax_output_long (abfd, 0);
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_bfd_evax_output_push (abfd); /* prepare output for subrecords */
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while (section != 0)
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{
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#if EVAX_DEBUG
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evax_debug (3, "Section #%d %s, %d bytes\n", section->index, section->name, (int)section->_raw_size);
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#endif
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/* 13 bytes egsd, max 31 chars name -> should be 44 bytes */
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if (_bfd_evax_output_check (abfd, 64) < 0)
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{
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_bfd_evax_output_pop (abfd);
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_bfd_evax_output_end (abfd);
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_bfd_evax_output_begin (abfd, EOBJ_S_C_EGSD, -1);
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_bfd_evax_output_long (abfd, 0);
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_bfd_evax_output_push (abfd); /* prepare output for subrecords */
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}
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/* Create dummy sections to keep consecutive indices */
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while (section->index - last_index > 1)
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{
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#if EVAX_DEBUG
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evax_debug (3, "index %d, last %d\n", section->index, last_index);
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#endif
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_bfd_evax_output_begin (abfd, EGSD_S_C_PSC, -1);
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_bfd_evax_output_short (abfd, 0);
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_bfd_evax_output_short (abfd, 0);
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_bfd_evax_output_long (abfd, 0);
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sprintf (dummy_name, ".DUMMY%02d", last_index);
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_bfd_evax_output_counted (abfd, dummy_name);
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_bfd_evax_output_flush (abfd);
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last_index++;
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}
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/* Don't know if this is neccesary for the linker but for now it keeps
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evax_slurp_egsd happy */
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sname = (char *)section->name;
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if (*sname == '.')
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{
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sname++;
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if ((*sname == 't') && (strcmp (sname, "text") == 0))
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sname = EVAX_CODE_NAME;
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else if ((*sname == 'd') && (strcmp (sname, "data") == 0))
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sname = EVAX_DATA_NAME;
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else if ((*sname == 'b') && (strcmp (sname, "bss") == 0))
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sname = EVAX_BSS_NAME;
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|
else if ((*sname == 'l') && (strcmp (sname, "link") == 0))
|
|
sname = EVAX_LINK_NAME;
|
|
else if ((*sname == 'r') && (strcmp (sname, "rdata") == 0))
|
|
sname = EVAX_READONLY_NAME;
|
|
else if ((*sname == 'l') && (strcmp (sname, "literal") == 0))
|
|
sname = EVAX_LITERAL_NAME;
|
|
else if ((*sname == 'c') && (strcmp (sname, "comm") == 0))
|
|
sname = EVAX_COMMON_NAME;
|
|
else if ((*sname == 'l') && (strcmp (sname, "lcomm") == 0))
|
|
sname = EVAX_LOCAL_NAME;
|
|
}
|
|
else
|
|
sname = _bfd_evax_length_hash_symbol (abfd, sname, EOBJ_S_C_SECSIZ);
|
|
|
|
_bfd_evax_output_begin (abfd, EGSD_S_C_PSC, -1);
|
|
_bfd_evax_output_short (abfd, section->alignment_power & 0xff);
|
|
if (bfd_is_com_section (section))
|
|
{
|
|
new_flags = (EGPS_S_V_OVR|EGPS_S_V_REL|EGPS_S_V_GBL|EGPS_S_V_RD|EGPS_S_V_WRT|EGPS_S_V_NOMOD|EGPS_S_V_COM);
|
|
}
|
|
else
|
|
{
|
|
new_flags = evax_esecflag_by_name (sname, section->_raw_size);
|
|
}
|
|
_bfd_evax_output_short (abfd, new_flags);
|
|
_bfd_evax_output_long (abfd, section->_raw_size);
|
|
_bfd_evax_output_counted (abfd, sname);
|
|
_bfd_evax_output_flush (abfd);
|
|
|
|
last_index = section->index;
|
|
section = section->next;
|
|
}
|
|
|
|
/* output symbols */
|
|
|
|
#if EVAX_DEBUG
|
|
evax_debug (3, "%d symbols found\n", abfd->symcount);
|
|
#endif
|
|
|
|
bfd_set_start_address (abfd, (bfd_vma)-1);
|
|
|
|
for (symnum = 0; symnum < abfd->symcount; symnum++)
|
|
{
|
|
|
|
symbol = abfd->outsymbols[symnum];
|
|
if (*(symbol->name) == '_')
|
|
{
|
|
if (strcmp (symbol->name, "__main") == 0)
|
|
bfd_set_start_address (abfd, (bfd_vma)symbol->value);
|
|
}
|
|
old_flags = symbol->flags;
|
|
|
|
if (old_flags & BSF_FILE)
|
|
continue;
|
|
|
|
if (((old_flags & (BSF_GLOBAL|BSF_WEAK)) == 0) /* not xdef */
|
|
&& (!bfd_is_und_section (symbol->section))) /* and not xref */
|
|
continue; /* dont output */
|
|
|
|
/* 13 bytes egsd, max 64 chars name -> should be 77 bytes */
|
|
|
|
if (_bfd_evax_output_check (abfd, 80) < 0)
|
|
{
|
|
_bfd_evax_output_pop (abfd);
|
|
_bfd_evax_output_end (abfd);
|
|
_bfd_evax_output_begin (abfd, EOBJ_S_C_EGSD, -1);
|
|
_bfd_evax_output_long (abfd, 0);
|
|
_bfd_evax_output_push (abfd); /* prepare output for subrecords */
|
|
}
|
|
|
|
_bfd_evax_output_begin (abfd, EGSD_S_C_SYM, -1);
|
|
|
|
_bfd_evax_output_short (abfd, 0); /* data type, alignment */
|
|
|
|
new_flags = 0;
|
|
|
|
if (old_flags & BSF_WEAK)
|
|
new_flags |= EGSY_S_V_WEAK;
|
|
if (bfd_is_com_section (symbol->section)) /* .comm */
|
|
new_flags |= (EGSY_S_V_WEAK|EGSY_S_V_COMM);
|
|
|
|
if (old_flags & BSF_FUNCTION)
|
|
{
|
|
new_flags |= EGSY_S_V_NORM;
|
|
new_flags |= EGSY_S_V_REL;
|
|
}
|
|
if (old_flags & (BSF_GLOBAL|BSF_WEAK))
|
|
{
|
|
new_flags |= EGSY_S_V_DEF;
|
|
if (!bfd_is_abs_section (symbol->section))
|
|
new_flags |= EGSY_S_V_REL;
|
|
}
|
|
_bfd_evax_output_short (abfd, new_flags);
|
|
|
|
if (old_flags & (BSF_GLOBAL|BSF_WEAK)) /* symbol definition */
|
|
{
|
|
if (old_flags & BSF_FUNCTION)
|
|
{
|
|
_bfd_evax_output_quad (abfd, symbol->value);
|
|
_bfd_evax_output_quad (abfd,
|
|
((asymbol *)(symbol->udata.p))->value);
|
|
_bfd_evax_output_long (abfd,
|
|
(((asymbol *)(symbol->udata.p))
|
|
->section->index));
|
|
_bfd_evax_output_long (abfd, symbol->section->index);
|
|
}
|
|
else
|
|
{
|
|
_bfd_evax_output_quad (abfd, symbol->value); /* L_VALUE */
|
|
_bfd_evax_output_quad (abfd, 0); /* L_CODE_ADDRESS */
|
|
_bfd_evax_output_long (abfd, 0); /* L_CA_PSINDX */
|
|
_bfd_evax_output_long (abfd, symbol->section->index);/* L_PSINDX */
|
|
}
|
|
}
|
|
_bfd_evax_output_counted (abfd, _bfd_evax_length_hash_symbol (abfd, symbol->name, EOBJ_S_C_SYMSIZ));
|
|
|
|
_bfd_evax_output_flush (abfd);
|
|
|
|
}
|
|
|
|
_bfd_evax_output_alignment (abfd, 8);
|
|
_bfd_evax_output_pop (abfd);
|
|
_bfd_evax_output_end (abfd);
|
|
|
|
return 0;
|
|
}
|