arch/all-native/econsole/econsole.c

   1 /*
   2     Copyright  1995-2011, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Emergency console launcher for AROS
   6     Lang: english
   7 */
   8
   9 #include <aros/debug.h>
  10
  11 #include <aros/asmcall.h>
  12 #include <dos/dosextens.h>
  13 #include <dos/stdio.h>
  14
  15 #include <exec/resident.h>
  16 #include <graphics/modeid.h>
  17 #include <utility/tagitem.h>
  18 #include <libraries/expansion.h>
  19
  20 #include <proto/exec.h>
  21 #include <proto/dos.h>
  22 #include <proto/graphics.h>
  23 #include <proto/alib.h>
  24 #include <proto/expansion.h>
  25
  26 #include LC_LIBDEFS_FILE
  27
  28 /********* ECON: DOS Handler
  29  *
  30  * ECON:          - interactive file, accesing the Exec/Raw* functions
  31  * ECON:AROS.boot - synthetic file, to allow AROS to boot from ECON:
  32  *                  as a last resort.
  33  */
  34 static void replyPkt(struct DosPacket *dp)
  35 {
  36     struct MsgPort *mp;
  37     struct Message *mn;
  38
  39     mp = dp->dp_Port;
  40     mn = dp->dp_Link;
  41     mn->mn_Node.ln_Name = (char*)dp;
  42     dp->dp_Port = &((struct Process*)FindTask(NULL))->pr_MsgPort;
  43     PutMsg(mp, mn);
  44 }
  45
  46 struct econsole_file {
  47     CONST_STRPTR ef_Name;
  48     BOOL    ef_Interactive;
  49     SIPTR (*ef_Read)(APTR buff, SIPTR len, SIPTR *actual);
  50     SIPTR (*ef_Write)(CONST_APTR buff, SIPTR len, SIPTR *actual);
  51     SIPTR (*ef_ExamineFH)(struct FileInfoBlock *fib, SIPTR *actual);
  52 };
  53
  54 SIPTR Raw_Read(APTR buff, SIPTR len, SIPTR *err)
  55 {
  56     SIPTR actual = 0;
  57     UBYTE *cp = buff;
  58
  59     D(bug("%s: buff=%p, len=%d\n", __func__, buff, len));
  60     while (actual < len) {
  61         LONG c = RawMayGetChar();
  62         if (c < 0) {
  63             Reschedule();
  64             continue;
  65         }
  66
  67         /* Trivial line editing */
  68         switch (c) {
  69         case '\b':      /* Backspace */
  70             if ((APTR)cp > buff) {
  71                 actual--;
  72                 cp--;
  73             }
  74             RawPutChar('\b');
  75             RawPutChar(' ');
  76             RawPutChar('\b');
  77             break;
  78         case '\r':
  79         case '\n':       /* Done */
  80             *(cp++) = '\n';
  81             len = (++actual);
  82             RawPutChar('\n');
  83             break;
  84         default:
  85             *(cp++) = (UBYTE)c;
  86             actual++;
  87             RawPutChar(c);
  88             break;
  89         }
  90     }
  91
  92     *err = 0;
  93     return actual;
  94 }
  95
  96 SIPTR Raw_Write(CONST_APTR buff, SIPTR len, SIPTR *err)
  97 {
  98     SIPTR actual;
  99     CONST UBYTE *cp = buff;
 100
 101     D(bug("%s: buff=%p, len=%d\n", __func__, buff, len));
 102     for (actual = 0; actual < len; actual++, cp++) {
 103         RawPutChar(*cp);
 104     }
 105
 106     *err = 0;
 107     return actual;
 108 }
 109
 110 SIPTR Raw_ExamineFH(struct FileInfoBlock *fib, SIPTR *errcode)
 111 {
 112     memset(fib, 0, sizeof(*fib));
 113     fib->fib_Protection = FIBF_WRITE | FIBF_READ;
 114
 115     *errcode = 0;
 116     return DOSTRUE;
 117 }
 118
 119 CONST UBYTE CONST Boot_Data[] = AROS_CPU;
 120
 121 SIPTR Boot_Read(APTR buff, SIPTR len, SIPTR *err)
 122 {
 123     SIPTR actual;
 124     UBYTE *cp = buff;
 125
 126     D(bug("%s: len=%d \"%s\"\n", __func__, len, Boot_Data));
 127     for (actual = 0; actual < len; actual++, cp++) {
 128         if (Boot_Data[actual] == 0)
 129             break;
 130         *cp = Boot_Data[actual];
 131     }
 132
 133     *err = 0;
 134     return actual;
 135 }
 136
 137 SIPTR Boot_Write(CONST_APTR buff, SIPTR len, SIPTR *err)
 138 {
 139     *err = ERROR_WRITE_PROTECTED;
 140     return (SIPTR)-1;
 141 }
 142
 143 SIPTR Boot_ExamineFH(struct FileInfoBlock *fib, SIPTR *errcode)
 144 {
 145     memset(fib, 0, sizeof(*fib));
 146     fib->fib_FileName[0] = strlen("AROS.boot");
 147     CopyMem("AROS.boot", &fib->fib_FileName[1], fib->fib_FileName[0] + 1);
 148     fib->fib_Protection = FIBF_READ;
 149     fib->fib_Size = sizeof(Boot_Data) - 1;
 150
 151     *errcode = 0;
 152     return DOSTRUE;
 153 }
 154
 155 const struct econsole_file econsole_files[] = {
 156    { .ef_Name = "", .ef_Interactive = TRUE,
 157      .ef_Read = Raw_Read, .ef_Write = Raw_Write,
 158      .ef_ExamineFH = Raw_ExamineFH
 159    },
 160    { .ef_Name = "AROS.boot", .ef_Interactive = FALSE,
 161      .ef_Read = Boot_Read, .ef_Write = Boot_Write,
 162      .ef_ExamineFH = Boot_ExamineFH
 163    },
 164 };
 165
 166 #ifndef ARRAY_SIZE
 167 #define ARRAY_SIZE(x)   (sizeof(x)/sizeof(x[0]))
 168 #endif
 169
 170 const struct econsole_file *econsole_file_of(BSTR bname, SIPTR *errcode)
 171 {
 172     STRPTR name, file;
 173     int i;
 174     int blen = AROS_BSTR_strlen(bname);
 175
 176     name = AllocMem(blen + 1, MEMF_ANY);
 177     CopyMem(AROS_BSTR_ADDR(bname), name, blen);
 178     name[blen] = 0;
 179
 180     file = strchr(name, ':');
 181     if (file == NULL)
 182         file = name;
 183     else
 184         file++;
 185
 186     D(bug("%s: bname=%b, name=%s, file=%s\n", __func__, bname, name, file));
 187     for (i = 0; i < ARRAY_SIZE(econsole_files); i++) {
 188         if (strcmp(econsole_files[i].ef_Name, file) == 0) {
 189             FreeMem(name, blen + 1);
 190             *errcode = 0;
 191             return &econsole_files[i];
 192         }
 193     }
 194
 195     FreeMem(name, blen + 1);
 196     *errcode = ERROR_OBJECT_NOT_FOUND;
 197     return NULL;
 198 }
 199
 200 LONG econ_handler(struct ExecBase *SysBase)
 201 {
 202     struct DosPacket *dp;
 203     struct MsgPort *mp;
 204     BOOL dead = FALSE;
 205     struct FileHandle *fh;
 206     const struct econsole_file *efile;
 207     struct DeviceNode *dn;
 208
 209     mp = &((struct Process *)FindTask(NULL))->pr_MsgPort;
 210
 211     WaitPort(mp);
 212
 213     dp = (struct DosPacket *)(GetMsg(mp)->mn_Node.ln_Name);
 214
 215     dn = ((struct DeviceNode *)BADDR(dp->dp_Arg3));
 216     dn->dn_Task = mp;
 217
 218     dp->dp_Res2 = 0;
 219     dp->dp_Res1 = DOSTRUE;
 220
 221     RawIOInit();
 222
 223     D(bug("%s: started\n", __func__));
 224     do {
 225         replyPkt(dp);
 226         WaitPort(mp);
 227         dp = (struct DosPacket *)(GetMsg(mp)->mn_Node.ln_Name);
 228         D(bug("%s: type=%d\n", __func__, dp->dp_Type));
 229
 230         switch (dp->dp_Type) {
 231         case ACTION_LOCATE_OBJECT:
 232             if ((efile = econsole_file_of((BSTR)dp->dp_Arg2, &dp->dp_Res2))) {
 233                 D(bug("%s: efile=%p (%s)\n", __func__, efile, efile->ef_Name));
 234                 struct FileLock *fl = AllocMem(sizeof(*fl), MEMF_PUBLIC | MEMF_CLEAR);
 235                 fl->fl_Link = BNULL;
 236                 fl->fl_Key = (IPTR)efile;
 237                 fl->fl_Access = dp->dp_Arg3;
 238                 fl->fl_Task = mp;
 239                 fl->fl_Volume = MKBADDR(dn);
 240                 dp->dp_Res1 = (SIPTR)MKBADDR(fl);
 241             } else {
 242                 dp->dp_Res1 = DOSFALSE;
 243             }
 244             break;
 245         case ACTION_FH_FROM_LOCK:
 246             if (dp->dp_Arg2) {
 247                 struct FileLock *fl = BADDR(dp->dp_Arg2);
 248                 efile = (const struct econsole_file *)fl->fl_Key;
 249                 D(bug("%s: efile=%p (%s)\n", __func__, efile, efile->ef_Name));
 250                 fh = BADDR(dp->dp_Arg1);
 251                 fh->fh_Arg1 = (SIPTR)efile;
 252                 fh->fh_Type = mp;
 253                 fh->fh_Interactive = efile->ef_Interactive;
 254                 FreeMem(fl, sizeof(*fl));
 255                 dp->dp_Res2 = 0;
 256             } else {
 257                 dp->dp_Res2 = ERROR_OBJECT_NOT_FOUND;
 258             }
 259             dp->dp_Res1 = dp->dp_Res2 ? DOSFALSE : DOSTRUE;
 260             break;
 261         case ACTION_COPY_DIR_FH:
 262             if (dp->dp_Arg1) {
 263                 struct FileLock *fl = AllocMem(sizeof(*fl), MEMF_PUBLIC | MEMF_CLEAR);
 264                 efile = (const struct econsole_file *)dp->dp_Arg1;
 265                 D(bug("%s: efile=%p (%s)\n", __func__, efile, efile->ef_Name));
 266                 fl->fl_Link = BNULL;
 267                 fl->fl_Key = (SIPTR)efile;
 268                 fl->fl_Access = dp->dp_Arg3;
 269                 fl->fl_Task = mp;
 270                 fl->fl_Volume = MKBADDR(dn);
 271                 dp->dp_Res1 = (SIPTR)MKBADDR(fl);
 272                 dp->dp_Res2 = 0;
 273             } else {
 274                 dp->dp_Res1 = DOSFALSE;
 275                 dp->dp_Res2 = ERROR_OBJECT_NOT_FOUND;
 276             }
 277             break;
 278         case ACTION_FREE_LOCK:
 279             if (dp->dp_Arg1) {
 280                 struct FileLock *fl = BADDR(dp->dp_Arg1);
 281                 FreeMem(fl, sizeof(*fl));
 282             }
 283             dp->dp_Res1 = DOSTRUE;
 284             dp->dp_Res2 = 0;
 285             break;
 286         case ACTION_FINDINPUT:
 287         case ACTION_FINDOUTPUT:
 288         case ACTION_FINDUPDATE:
 289             if ((efile = econsole_file_of((BSTR)dp->dp_Arg3, &dp->dp_Res2))) {
 290                 D(bug("%s: efile=%p (%s)\n", __func__, efile, efile->ef_Name));
 291                 fh = BADDR(dp->dp_Arg1);
 292                 fh->fh_Arg1 = (SIPTR)efile;
 293                 fh->fh_Type = mp;
 294                 fh->fh_Interactive = efile->ef_Interactive;
 295             }
 296             dp->dp_Res1 = efile ? DOSTRUE : DOSFALSE;
 297             break;
 298         case ACTION_READ:
 299             if ((efile = (const struct econsole_file *)dp->dp_Arg1)) {
 300                 D(bug("%s: efile=%p (%s)\n", __func__, efile, efile->ef_Name));
 301                 dp->dp_Res1 = efile->ef_Read((APTR)dp->dp_Arg2, dp->dp_Arg3, &dp->dp_Res2);
 302             } else {
 303                 dp->dp_Res1 = DOSFALSE;
 304                 dp->dp_Res2 = ERROR_OBJECT_WRONG_TYPE;
 305             }
 306             break;
 307         case ACTION_WRITE:
 308             if ((efile = (const struct econsole_file *)dp->dp_Arg1)) {
 309                 D(bug("%s: efile=%p (%s)\n", __func__, efile, efile->ef_Name));
 310                 dp->dp_Res1 = efile->ef_Write((CONST_APTR)dp->dp_Arg2, dp->dp_Arg3, &dp->dp_Res2);
 311             } else {
 312                 dp->dp_Res1 = DOSFALSE;
 313                 dp->dp_Res2 = ERROR_OBJECT_WRONG_TYPE;
 314             }
 315             break;
 316         case ACTION_EXAMINE_FH:
 317             if ((efile = (const struct econsole_file *)dp->dp_Arg1)) {
 318                 dp->dp_Res1 = efile->ef_ExamineFH((struct FileInfoBlock *)BADDR(dp->dp_Arg2), &dp->dp_Res2);
 319             } else {
 320                 dp->dp_Res1 = DOSFALSE;
 321                 dp->dp_Res2 = ERROR_OBJECT_WRONG_TYPE;
 322             }
 323             break;
 324         case ACTION_END:
 325             dp->dp_Res1 = DOSTRUE;
 326             dp->dp_Res2 = 0;
 327             break;
 328         case ACTION_DIE:
 329             dp->dp_Res1 = DOSTRUE;
 330             dp->dp_Res2 = 0;
 331             dead = TRUE;
 332             break;
 333         default:
 334             dp->dp_Res1 = DOSFALSE;
 335             dp->dp_Res2 = ERROR_ACTION_NOT_KNOWN;
 336             break;
 337         }
 338         D(bug("%s: Type %d, Res1=%p, Res2=%p\n", __func__, dp->dp_Type, dp->dp_Res1, dp->dp_Res2));
 339     } while (!dead);
 340
 341     /* ACTION_DIE ends up here... */
 342     D(bug("%s: Exiting\n", __func__));
 343
 344     replyPkt(dp);
 345
 346     return RETURN_OK;
 347 }