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b4e125d935
An unsigned short value is promoted to int, thus triggering UB on a left shift of a positive value that results in a negative int. PR 26415 * vms-misc.c (vms_time_t_to_vms_time): Don't use unsigned short vars.
679 lines
15 KiB
C
679 lines
15 KiB
C
/* vms-misc.c -- BFD back-end for VMS/VAX (openVMS/VAX) and
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EVAX (openVMS/Alpha) files.
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Copyright (C) 1996-2020 Free Software Foundation, Inc.
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Miscellaneous functions.
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Written by Klaus K"ampf (kkaempf@rmi.de)
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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,
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MA 02110-1301, USA. */
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#if __STDC__
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#include <stdarg.h>
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#endif
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#include "sysdep.h"
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#include "bfd.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "safe-ctype.h"
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#ifdef VMS
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#define __NEW_STARLET
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#include <rms.h>
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#include <unixlib.h>
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#include <gen64def.h>
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#include <starlet.h>
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#define RME$C_SETRFM 0x00000001
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#include <unistd.h>
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#endif
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#include <time.h>
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#include "vms.h"
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#include "vms/emh.h"
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#if VMS_DEBUG
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/* Debug functions. */
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/* Debug function for all vms extensions evaluates environment
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variable VMS_DEBUG for a numerical value on the first call all
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error levels below this value are printed:
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Levels:
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1 toplevel bfd calls (functions from the bfd vector)
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2 functions called by bfd calls
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...
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9 almost everything
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Level is also indentation level. Indentation is performed
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if level > 0. */
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void
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_bfd_vms_debug (int level, char *format, ...)
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{
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static int min_level = -1;
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static FILE *output = NULL;
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char *eptr;
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va_list args;
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int abslvl = (level > 0) ? level : - level;
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if (min_level == -1)
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{
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if ((eptr = getenv ("VMS_DEBUG")) != NULL)
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{
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min_level = atoi (eptr);
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output = stderr;
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}
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else
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min_level = 0;
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}
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if (output == NULL)
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return;
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if (abslvl > min_level)
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return;
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while (--level > 0)
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fprintf (output, " ");
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va_start (args, format);
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vfprintf (output, format, args);
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fflush (output);
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va_end (args);
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}
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/* A debug function
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hex dump 'size' bytes starting at 'ptr'. */
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void
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_bfd_hexdump (int level, unsigned char *ptr, int size, int offset)
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{
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unsigned char *lptr = ptr;
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int count = 0;
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long start = offset;
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while (size-- > 0)
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{
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if ((count % 16) == 0)
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vms_debug (level, "%08lx:", start);
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vms_debug (-level, " %02x", *ptr++);
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count++;
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start++;
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if (size == 0)
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{
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while ((count % 16) != 0)
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{
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vms_debug (-level, " ");
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count++;
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}
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}
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if ((count % 16) == 0)
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{
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vms_debug (-level, " ");
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while (lptr < ptr)
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{
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vms_debug (-level, "%c", (*lptr < 32) ? '.' : *lptr);
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lptr++;
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}
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vms_debug (-level, "\n");
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}
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}
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if ((count % 16) != 0)
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vms_debug (-level, "\n");
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}
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#endif
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/* Copy sized string (string with fixed size) to new allocated area.
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Size is string size (size of record). */
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char *
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_bfd_vms_save_sized_string (bfd *abfd, unsigned char *str, size_t size)
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{
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char *newstr;
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if (size == (size_t) -1)
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{
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bfd_set_error (bfd_error_no_memory);
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return NULL;
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}
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newstr = bfd_alloc (abfd, size + 1);
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if (newstr == NULL)
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return NULL;
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memcpy (newstr, str, size);
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newstr[size] = 0;
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return newstr;
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}
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/* Copy counted string (string with size at first byte) to new allocated area.
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PTR points to size byte on entry. */
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char *
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_bfd_vms_save_counted_string (bfd *abfd, unsigned char *ptr, size_t maxlen)
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{
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unsigned int len = *ptr++;
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if (len > maxlen)
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return NULL;
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return _bfd_vms_save_sized_string (abfd, ptr, len);
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}
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/* Object output routines. */
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/* Begin new record.
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Write 2 bytes rectype and 2 bytes record length. */
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void
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_bfd_vms_output_begin (struct vms_rec_wr *recwr, int rectype)
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{
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vms_debug2 ((6, "_bfd_vms_output_begin (type %d)\n", rectype));
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/* Record must have been closed. */
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BFD_ASSERT (recwr->size == 0);
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_bfd_vms_output_short (recwr, (unsigned int) rectype);
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/* Placeholder for length. */
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_bfd_vms_output_short (recwr, 0);
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}
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/* Begin new sub-record.
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Write 2 bytes rectype, and 2 bytes record length. */
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void
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_bfd_vms_output_begin_subrec (struct vms_rec_wr *recwr, int rectype)
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{
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vms_debug2 ((6, "_bfd_vms_output_begin_subrec (type %d)\n", rectype));
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/* Subrecord must have been closed. */
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BFD_ASSERT (recwr->subrec_offset == 0);
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/* Save start of subrecord offset. */
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recwr->subrec_offset = recwr->size;
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/* Subrecord type. */
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_bfd_vms_output_short (recwr, (unsigned int) rectype);
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/* Placeholder for length. */
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_bfd_vms_output_short (recwr, 0);
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}
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/* Set record/subrecord alignment. */
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void
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_bfd_vms_output_alignment (struct vms_rec_wr *recwr, int alignto)
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{
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vms_debug2 ((6, "_bfd_vms_output_alignment (%d)\n", alignto));
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recwr->align = alignto;
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}
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/* Align the size of the current record (whose length is LENGTH).
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Warning: this obviously changes the record (and the possible subrecord)
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length. */
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static void
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_bfd_vms_output_align (struct vms_rec_wr *recwr, unsigned int length)
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{
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unsigned int real_size = recwr->size;
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unsigned int aligncount;
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/* Pad with 0 if alignment is required. */
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aligncount = (recwr->align - (length % recwr->align)) % recwr->align;
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vms_debug2 ((6, "align: adding %d bytes\n", aligncount));
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while (aligncount-- > 0)
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recwr->buf[real_size++] = 0;
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recwr->size = real_size;
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}
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/* Ends current sub-record. Set length field. */
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void
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_bfd_vms_output_end_subrec (struct vms_rec_wr *recwr)
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{
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int real_size = recwr->size;
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int length;
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/* Subrecord must be open. */
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BFD_ASSERT (recwr->subrec_offset != 0);
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length = real_size - recwr->subrec_offset;
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if (length == 0)
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return;
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_bfd_vms_output_align (recwr, length);
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/* Put length to buffer. */
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bfd_putl16 ((bfd_vma) (recwr->size - recwr->subrec_offset),
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recwr->buf + recwr->subrec_offset + 2);
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/* Close the subrecord. */
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recwr->subrec_offset = 0;
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}
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/* Ends current record (and write it). */
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void
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_bfd_vms_output_end (bfd *abfd, struct vms_rec_wr *recwr)
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{
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vms_debug2 ((6, "_bfd_vms_output_end (size %u)\n", recwr->size));
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/* Subrecord must have been closed. */
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BFD_ASSERT (recwr->subrec_offset == 0);
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if (recwr->size == 0)
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return;
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_bfd_vms_output_align (recwr, recwr->size);
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/* Write the length word. */
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bfd_putl16 ((bfd_vma) recwr->size, recwr->buf + 2);
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/* File is open in undefined (UDF) format on VMS, but ultimately will be
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converted to variable length (VAR) format. VAR format has a length
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word first which must be explicitly output in UDF format. */
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/* So, first the length word. */
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bfd_bwrite (recwr->buf + 2, 2, abfd);
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/* Align. */
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if (recwr->size & 1)
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recwr->buf[recwr->size++] = 0;
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/* Then the record. */
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bfd_bwrite (recwr->buf, (size_t) recwr->size, abfd);
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recwr->size = 0;
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}
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/* Check remaining buffer size. Return what's left. */
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int
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_bfd_vms_output_check (struct vms_rec_wr *recwr, int size)
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{
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vms_debug2 ((6, "_bfd_vms_output_check (%d)\n", size));
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return (MAX_OUTREC_SIZE - (recwr->size + size + MIN_OUTREC_LUFT));
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}
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/* Output byte (8 bit) value. */
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void
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_bfd_vms_output_byte (struct vms_rec_wr *recwr, unsigned int value)
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{
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vms_debug2 ((6, "_bfd_vms_output_byte (%02x)\n", value));
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*(recwr->buf + recwr->size) = value;
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recwr->size += 1;
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}
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/* Output short (16 bit) value. */
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void
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_bfd_vms_output_short (struct vms_rec_wr *recwr, unsigned int value)
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{
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vms_debug2 ((6, "_bfd_vms_output_short (%04x)\n", value));
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bfd_putl16 ((bfd_vma) value & 0xffff, recwr->buf + recwr->size);
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recwr->size += 2;
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}
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/* Output long (32 bit) value. */
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void
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_bfd_vms_output_long (struct vms_rec_wr *recwr, unsigned long value)
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{
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vms_debug2 ((6, "_bfd_vms_output_long (%08lx)\n", value));
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bfd_putl32 ((bfd_vma) value, recwr->buf + recwr->size);
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recwr->size += 4;
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}
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/* Output quad (64 bit) value. */
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void
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_bfd_vms_output_quad (struct vms_rec_wr *recwr, bfd_vma value)
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{
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vms_debug2 ((6, "_bfd_vms_output_quad (%08lx)\n", (unsigned long)value));
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bfd_putl64 (value, recwr->buf + recwr->size);
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recwr->size += 8;
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}
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/* Output c-string as counted string. */
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void
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_bfd_vms_output_counted (struct vms_rec_wr *recwr, const char *value)
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{
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int len;
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vms_debug2 ((6, "_bfd_vms_output_counted (%s)\n", value));
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len = strlen (value);
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if (len == 0)
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{
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_bfd_error_handler (_("_bfd_vms_output_counted called with zero bytes"));
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return;
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}
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if (len > 255)
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{
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_bfd_error_handler (_("_bfd_vms_output_counted called with too many bytes"));
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return;
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}
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_bfd_vms_output_byte (recwr, (unsigned int) len & 0xff);
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_bfd_vms_output_dump (recwr, (const unsigned char *)value, len);
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}
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/* Output character area. */
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void
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_bfd_vms_output_dump (struct vms_rec_wr *recwr, const unsigned char *data, int len)
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{
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vms_debug2 ((6, "_bfd_vms_output_dump (%d)\n", len));
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if (len == 0)
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return;
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memcpy (recwr->buf + recwr->size, data, (size_t) len);
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recwr->size += len;
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}
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/* Output count bytes of value. */
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void
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_bfd_vms_output_fill (struct vms_rec_wr *recwr, int value, int count)
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{
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vms_debug2 ((6, "_bfd_vms_output_fill (val %02x times %d)\n", value, count));
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if (count == 0)
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return;
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memset (recwr->buf + recwr->size, value, (size_t) count);
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recwr->size += count;
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}
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#ifdef VMS
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/* Convert the file to variable record length format. This is done
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using undocumented system call sys$modify().
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Pure VMS version. */
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static void
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vms_convert_to_var (char * vms_filename)
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{
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struct FAB fab = cc$rms_fab;
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fab.fab$l_fna = vms_filename;
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fab.fab$b_fns = strlen (vms_filename);
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fab.fab$b_fac = FAB$M_PUT;
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fab.fab$l_fop = FAB$M_ESC;
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fab.fab$l_ctx = RME$C_SETRFM;
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sys$open (&fab);
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fab.fab$b_rfm = FAB$C_VAR;
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sys$modify (&fab);
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sys$close (&fab);
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}
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static int
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vms_convert_to_var_1 (char *filename, int type)
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{
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if (type != DECC$K_FILE)
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return FALSE;
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vms_convert_to_var (filename);
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return TRUE;
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}
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/* Convert the file to variable record length format. This is done
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using undocumented system call sys$modify().
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Unix filename version. */
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int
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_bfd_vms_convert_to_var_unix_filename (const char *unix_filename)
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{
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if (decc$to_vms (unix_filename, &vms_convert_to_var_1, 0, 1) != 1)
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return FALSE;
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return TRUE;
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}
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#endif /* VMS */
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/* Manufacture a VMS like time on a unix based system.
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stolen from obj-vms.c. */
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unsigned char *
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get_vms_time_string (void)
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{
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static unsigned char tbuf[18];
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#ifndef VMS
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char *pnt;
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time_t timeb;
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time (& timeb);
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pnt = ctime (&timeb);
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pnt[3] = 0;
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pnt[7] = 0;
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pnt[10] = 0;
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pnt[16] = 0;
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pnt[24] = 0;
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sprintf ((char *) tbuf, "%2s-%3s-%s %s",
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pnt + 8, pnt + 4, pnt + 20, pnt + 11);
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#else
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struct
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{
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int Size;
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unsigned char *Ptr;
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} Descriptor;
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Descriptor.Size = 17;
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Descriptor.Ptr = tbuf;
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SYS$ASCTIM (0, &Descriptor, 0, 0);
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#endif /* not VMS */
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vms_debug2 ((6, "vmstimestring:'%s'\n", tbuf));
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return tbuf;
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}
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/* Create module name from filename (ie, extract the basename and convert it
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in upper cases). Works on both VMS and UNIX pathes.
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The result has to be free(). */
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char *
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vms_get_module_name (const char *filename, bfd_boolean upcase)
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{
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char *fname, *fptr;
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const char *fout;
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/* Strip VMS path. */
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fout = strrchr (filename, ']');
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if (fout == NULL)
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fout = strchr (filename, ':');
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if (fout != NULL)
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fout++;
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else
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fout = filename;
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/* Strip UNIX path. */
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fptr = strrchr (fout, '/');
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if (fptr != NULL)
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fout = fptr + 1;
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fname = strdup (fout);
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/* Strip suffix. */
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fptr = strrchr (fname, '.');
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if (fptr != 0)
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*fptr = 0;
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/* Convert to upper case and truncate at 31 characters.
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(VMS object file format restricts module name length to 31). */
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fptr = fname;
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for (fptr = fname; *fptr != 0; fptr++)
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{
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if (*fptr == ';' || (fptr - fname) >= 31)
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{
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*fptr = 0;
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break;
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}
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if (upcase)
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*fptr = TOUPPER (*fptr);
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}
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return fname;
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}
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/* Compared to usual UNIX time_t, VMS time has less limits:
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- 64 bit (63 bits in fact as the MSB must be 0)
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- 100ns granularity
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- epoch is Nov 17, 1858.
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Here has the constants and the routines used to convert VMS from/to UNIX time.
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The conversion routines don't assume 64 bits arithmetic.
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||
|
||
Here we assume that the definition of time_t is the UNIX one, ie integer
|
||
type, expressing seconds since the epoch. */
|
||
|
||
/* UNIX time granularity for VMS, ie 1s / 100ns. */
|
||
#define VMS_TIME_FACTOR 10000000
|
||
|
||
/* Number of seconds since VMS epoch of the UNIX epoch. */
|
||
#define VMS_TIME_OFFSET 3506716800U
|
||
|
||
/* Convert a VMS time to a unix time. */
|
||
|
||
time_t
|
||
vms_time_to_time_t (unsigned int hi, unsigned int lo)
|
||
{
|
||
unsigned int tmp;
|
||
unsigned int rlo;
|
||
int i;
|
||
time_t res;
|
||
|
||
/* First convert to seconds. */
|
||
tmp = hi % VMS_TIME_FACTOR;
|
||
hi = hi / VMS_TIME_FACTOR;
|
||
rlo = 0;
|
||
for (i = 0; i < 4; i++)
|
||
{
|
||
tmp = (tmp << 8) | (lo >> 24);
|
||
lo <<= 8;
|
||
|
||
rlo = (rlo << 8) | (tmp / VMS_TIME_FACTOR);
|
||
tmp %= VMS_TIME_FACTOR;
|
||
}
|
||
lo = rlo;
|
||
|
||
/* Return 0 in case of overflow. */
|
||
if (hi > 1
|
||
|| (hi == 1 && lo >= VMS_TIME_OFFSET))
|
||
return 0;
|
||
|
||
/* Return 0 in case of underflow. */
|
||
if (hi == 0 && lo < VMS_TIME_OFFSET)
|
||
return 0;
|
||
|
||
res = lo - VMS_TIME_OFFSET;
|
||
if (res <= 0)
|
||
return 0;
|
||
return res;
|
||
}
|
||
|
||
/* Convert a time_t to a VMS time. */
|
||
|
||
void
|
||
vms_time_t_to_vms_time (time_t ut, unsigned int *hi, unsigned int *lo)
|
||
{
|
||
unsigned int val[4];
|
||
unsigned int tmp[4];
|
||
unsigned int carry;
|
||
int i;
|
||
|
||
/* Put into val. */
|
||
val[0] = ut & 0xffff;
|
||
val[1] = (ut >> 16) & 0xffff;
|
||
val[2] = sizeof (ut) > 4 ? (ut >> 32) & 0xffff : 0;
|
||
val[3] = sizeof (ut) > 4 ? (ut >> 48) & 0xffff : 0;
|
||
|
||
/* Add offset. */
|
||
tmp[0] = VMS_TIME_OFFSET & 0xffff;
|
||
tmp[1] = VMS_TIME_OFFSET >> 16;
|
||
tmp[2] = 0;
|
||
tmp[3] = 0;
|
||
carry = 0;
|
||
for (i = 0; i < 4; i++)
|
||
{
|
||
carry += tmp[i] + val[i];
|
||
val[i] = carry & 0xffff;
|
||
carry = carry >> 16;
|
||
}
|
||
|
||
/* Multiply by factor, well first by 10000 and then by 1000. */
|
||
carry = 0;
|
||
for (i = 0; i < 4; i++)
|
||
{
|
||
carry += val[i] * 10000;
|
||
val[i] = carry & 0xffff;
|
||
carry = carry >> 16;
|
||
}
|
||
carry = 0;
|
||
for (i = 0; i < 4; i++)
|
||
{
|
||
carry += val[i] * 1000;
|
||
val[i] = carry & 0xffff;
|
||
carry = carry >> 16;
|
||
}
|
||
|
||
/* Write the result. */
|
||
*lo = val[0] | (val[1] << 16);
|
||
*hi = val[2] | (val[3] << 16);
|
||
}
|
||
|
||
/* Convert a raw (stored in a buffer) VMS time to a unix time. */
|
||
|
||
time_t
|
||
vms_rawtime_to_time_t (unsigned char *buf)
|
||
{
|
||
unsigned int hi = bfd_getl32 (buf + 4);
|
||
unsigned int lo = bfd_getl32 (buf + 0);
|
||
|
||
return vms_time_to_time_t (hi, lo);
|
||
}
|
||
|
||
void
|
||
vms_get_time (unsigned int *hi, unsigned int *lo)
|
||
{
|
||
#ifdef VMS
|
||
struct _generic_64 t;
|
||
|
||
sys$gettim (&t);
|
||
*lo = t.gen64$q_quadword;
|
||
*hi = t.gen64$q_quadword >> 32;
|
||
#else
|
||
time_t t;
|
||
|
||
time (&t);
|
||
vms_time_t_to_vms_time (t, hi, lo);
|
||
#endif
|
||
}
|
||
|
||
/* Get the current time into a raw buffer BUF. */
|
||
|
||
void
|
||
vms_raw_get_time (unsigned char *buf)
|
||
{
|
||
unsigned int hi, lo;
|
||
|
||
vms_get_time (&hi, &lo);
|
||
bfd_putl32 (lo, buf + 0);
|
||
bfd_putl32 (hi, buf + 4);
|
||
}
|