| 1 | /* VMS mapping of data and alloc arena for GNU Emacs. |
| 2 | Copyright (C) 1986, 1987 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GNU Emacs. |
| 5 | |
| 6 | GNU Emacs is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 1, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GNU Emacs is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GNU Emacs; see the file COPYING. If not, write to |
| 18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | /* Written by Mukesh Prasad. */ |
| 21 | |
| 22 | #ifdef VMS |
| 23 | |
| 24 | #include <config.h> |
| 25 | #include "lisp.h" |
| 26 | #include <rab.h> |
| 27 | #include <fab.h> |
| 28 | #include <rmsdef.h> |
| 29 | #include <secdef.h> |
| 30 | |
| 31 | /* RMS block size */ |
| 32 | #define BLOCKSIZE 512 |
| 33 | |
| 34 | /* Maximum number of bytes to be written in one RMS write. |
| 35 | * Must be a multiple of BLOCKSIZE. |
| 36 | */ |
| 37 | #define MAXWRITE (BLOCKSIZE * 30) |
| 38 | |
| 39 | /* This funniness is to ensure that sdata occurs alphabetically BEFORE the |
| 40 | $DATA psect and that edata occurs after ALL Emacs psects. This is |
| 41 | because the VMS linker sorts all psects in a cluster alphabetically |
| 42 | during the linking, unless you use the cluster_psect command. Emacs |
| 43 | uses the cluster command to group all Emacs psects into one cluster; |
| 44 | this keeps the dumped data separate from any loaded libraries. */ |
| 45 | |
| 46 | globaldef {"$D$ATA"} char sdata[512]; /* Start of saved data area */ |
| 47 | globaldef {"__DATA"} char edata[512]; /* End of saved data area */ |
| 48 | |
| 49 | /* Structure to write into first block of map file. |
| 50 | */ |
| 51 | |
| 52 | struct map_data |
| 53 | { |
| 54 | char * sdata; /* Start of data area */ |
| 55 | char * edata; /* End of data area */ |
| 56 | int datablk; /* Block in file to map data area from/to */ |
| 57 | }; |
| 58 | |
| 59 | static void fill_fab (), fill_rab (); |
| 60 | static int write_data (); |
| 61 | |
| 62 | extern char *start_of_data (); |
| 63 | extern int vms_out_initial; /* Defined in malloc.c */ |
| 64 | |
| 65 | /* Maps in the data and alloc area from the map file. |
| 66 | */ |
| 67 | |
| 68 | int |
| 69 | mapin_data (name) |
| 70 | char * name; |
| 71 | { |
| 72 | struct FAB fab; |
| 73 | struct RAB rab; |
| 74 | int status, size; |
| 75 | int inadr[2]; |
| 76 | struct map_data map_data; |
| 77 | |
| 78 | /* Open map file. */ |
| 79 | fab = cc$rms_fab; |
| 80 | fab.fab$b_fac = FAB$M_BIO|FAB$M_GET; |
| 81 | fab.fab$l_fna = name; |
| 82 | fab.fab$b_fns = strlen (name); |
| 83 | status = sys$open (&fab); |
| 84 | if (status != RMS$_NORMAL) |
| 85 | { |
| 86 | printf ("Map file not available, running bare Emacs....\n"); |
| 87 | return 0; /* Map file not available */ |
| 88 | } |
| 89 | /* Connect the RAB block */ |
| 90 | rab = cc$rms_rab; |
| 91 | rab.rab$l_fab = &fab; |
| 92 | rab.rab$b_rac = RAB$C_SEQ; |
| 93 | rab.rab$l_rop = RAB$M_BIO; |
| 94 | status = sys$connect (&rab); |
| 95 | if (status != RMS$_NORMAL) |
| 96 | lib$stop (status); |
| 97 | /* Read the header data */ |
| 98 | rab.rab$l_ubf = &map_data; |
| 99 | rab.rab$w_usz = sizeof (map_data); |
| 100 | rab.rab$l_bkt = 0; |
| 101 | status = sys$read (&rab); |
| 102 | if (status != RMS$_NORMAL) |
| 103 | lib$stop (status); |
| 104 | status = sys$close (&fab); |
| 105 | if (status != RMS$_NORMAL) |
| 106 | lib$stop (status); |
| 107 | if (map_data.sdata != start_of_data ()) |
| 108 | { |
| 109 | printf ("Start of data area has moved: cannot map in data.\n"); |
| 110 | return 0; |
| 111 | } |
| 112 | if (map_data.edata != edata) |
| 113 | { |
| 114 | printf ("End of data area has moved: cannot map in data.\n"); |
| 115 | return 0; |
| 116 | } |
| 117 | fab.fab$l_fop |= FAB$M_UFO; |
| 118 | status = sys$open (&fab); |
| 119 | if (status != RMS$_NORMAL) |
| 120 | lib$stop (status); |
| 121 | /* Map data area. */ |
| 122 | inadr[0] = map_data.sdata; |
| 123 | inadr[1] = map_data.edata; |
| 124 | status = sys$crmpsc (inadr, 0, 0, SEC$M_CRF | SEC$M_WRT, 0, 0, 0, |
| 125 | fab.fab$l_stv, 0, map_data.datablk, 0, 0); |
| 126 | if (! (status & 1)) |
| 127 | lib$stop (status); |
| 128 | } |
| 129 | |
| 130 | /* Writes the data and alloc area to the map file. |
| 131 | */ |
| 132 | mapout_data (into) |
| 133 | char * into; |
| 134 | { |
| 135 | struct FAB fab; |
| 136 | struct RAB rab; |
| 137 | int status; |
| 138 | struct map_data map_data; |
| 139 | int datasize, msize; |
| 140 | |
| 141 | if (vms_out_initial) |
| 142 | { |
| 143 | error ("Out of initial allocation. Must rebuild emacs with more memory (VMS_ALLOCATION_SIZE)."); |
| 144 | return 0; |
| 145 | } |
| 146 | map_data.sdata = start_of_data (); |
| 147 | map_data.edata = edata; |
| 148 | datasize = map_data.edata - map_data.sdata + 1; |
| 149 | map_data.datablk = 2 + (sizeof (map_data) + BLOCKSIZE - 1) / BLOCKSIZE; |
| 150 | /* Create map file. */ |
| 151 | fab = cc$rms_fab; |
| 152 | fab.fab$b_fac = FAB$M_BIO|FAB$M_PUT; |
| 153 | fab.fab$l_fna = into; |
| 154 | fab.fab$b_fns = strlen (into); |
| 155 | fab.fab$l_fop = FAB$M_CBT; |
| 156 | fab.fab$b_org = FAB$C_SEQ; |
| 157 | fab.fab$b_rat = 0; |
| 158 | fab.fab$b_rfm = FAB$C_VAR; |
| 159 | fab.fab$l_alq = 1 + map_data.datablk + |
| 160 | ((datasize + BLOCKSIZE - 1) / BLOCKSIZE); |
| 161 | status = sys$create (&fab); |
| 162 | if (status != RMS$_NORMAL) |
| 163 | { |
| 164 | error ("Could not create map file"); |
| 165 | return 0; |
| 166 | } |
| 167 | /* Connect the RAB block */ |
| 168 | rab = cc$rms_rab; |
| 169 | rab.rab$l_fab = &fab; |
| 170 | rab.rab$b_rac = RAB$C_SEQ; |
| 171 | rab.rab$l_rop = RAB$M_BIO; |
| 172 | status = sys$connect (&rab); |
| 173 | if (status != RMS$_NORMAL) |
| 174 | { |
| 175 | error ("RMS connect to map file failed"); |
| 176 | return 0; |
| 177 | } |
| 178 | /* Write the header */ |
| 179 | rab.rab$l_rbf = &map_data; |
| 180 | rab.rab$w_rsz = sizeof (map_data); |
| 181 | status = sys$write (&rab); |
| 182 | if (status != RMS$_NORMAL) |
| 183 | { |
| 184 | error ("RMS write (header) to map file failed"); |
| 185 | return 0; |
| 186 | } |
| 187 | if (! write_data (&rab, map_data.datablk, map_data.sdata, datasize)) |
| 188 | return 0; |
| 189 | status = sys$close (&fab); |
| 190 | if (status != RMS$_NORMAL) |
| 191 | { |
| 192 | error ("RMS close on map file failed"); |
| 193 | return 0; |
| 194 | } |
| 195 | return 1; |
| 196 | } |
| 197 | |
| 198 | static int |
| 199 | write_data (rab, firstblock, data, length) |
| 200 | struct RAB * rab; |
| 201 | char * data; |
| 202 | { |
| 203 | int status; |
| 204 | |
| 205 | rab->rab$l_bkt = firstblock; |
| 206 | while (length > 0) |
| 207 | { |
| 208 | rab->rab$l_rbf = data; |
| 209 | rab->rab$w_rsz = length > MAXWRITE ? MAXWRITE : length; |
| 210 | status = sys$write (rab, 0, 0); |
| 211 | if (status != RMS$_NORMAL) |
| 212 | { |
| 213 | error ("RMS write to map file failed"); |
| 214 | return 0; |
| 215 | } |
| 216 | data = &data[MAXWRITE]; |
| 217 | length -= MAXWRITE; |
| 218 | rab->rab$l_bkt = 0; |
| 219 | } |
| 220 | return 1; |
| 221 | } /* write_data */ |
| 222 | |
| 223 | #endif /* VMS */ |
| 224 | |