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Annotation of 43BSDReno/contrib/emacs-18.55/gdb/m-merlin.h, revision 1.1

1.1     ! root        1: /* Definitions to make GDB run on a merlin under utek 2.1
        !             2:    Copyright (C) 1986, 1987 Free Software Foundation, Inc.
        !             3: 
        !             4: GDB is distributed in the hope that it will be useful, but WITHOUT ANY
        !             5: WARRANTY.  No author or distributor accepts responsibility to anyone
        !             6: for the consequences of using it or for whether it serves any
        !             7: particular purpose or works at all, unless he says so in writing.
        !             8: Refer to the GDB General Public License for full details.
        !             9: 
        !            10: Everyone is granted permission to copy, modify and redistribute GDB,
        !            11: but only under the conditions described in the GDB General Public
        !            12: License.  A copy of this license is supposed to have been given to you
        !            13: along with GDB so you can know your rights and responsibilities.  It
        !            14: should be in a file named COPYING.  Among other things, the copyright
        !            15: notice and this notice must be preserved on all copies.
        !            16: 
        !            17: In other words, go ahead and share GDB, but don't try to stop
        !            18: anyone else from sharing it farther.  Help stamp out software hoarding!
        !            19: */
        !            20: 
        !            21: #ifndef ns16000
        !            22: #define ns16000
        !            23: #endif
        !            24: 
        !            25: # include      <machine/reg.h>
        !            26: 
        !            27: /* Define this if the C compiler puts an underscore at the front
        !            28:    of external names before giving them to the linker.  */
        !            29: 
        !            30: #define NAMES_HAVE_UNDERSCORE
        !            31: 
        !            32: /* Debugger information will be in DBX format.  */
        !            33: 
        !            34: #define READ_DBX_FORMAT
        !            35: 
        !            36: /* Offset from address of function to start of its code.
        !            37:    Zero on most machines.  */
        !            38: 
        !            39: #define FUNCTION_START_OFFSET 0
        !            40: 
        !            41: /* Advance PC across any function entry prologue instructions
        !            42:    to reach some "real" code.  */
        !            43: 
        !            44: #define SKIP_PROLOGUE(pc)                              \
        !            45: { register int op = read_memory_integer (pc, 1);       \
        !            46:   if (op == 0x82)                                      \
        !            47:     { op = read_memory_integer (pc+2,1);               \
        !            48:       if ((op & 0x80) == 0) pc += 3;                   \
        !            49:       else if ((op & 0xc0) == 0x80) pc += 4;           \
        !            50:       else pc += 6;                                    \
        !            51:     }}
        !            52: 
        !            53: /* Immediately after a function call, return the saved pc.
        !            54:    Can't always go through the frames for this because on some machines
        !            55:    the new frame is not set up until the new function executes
        !            56:    some instructions.  */
        !            57: 
        !            58: #define SAVED_PC_AFTER_CALL(frame) \
        !            59:        read_memory_integer (read_register (SP_REGNUM), 4)
        !            60: 
        !            61: /* This is the amount to subtract from u.u_ar0
        !            62:    to get the offset in the core file of the register values.  */
        !            63: 
        !            64: #define KERNEL_U_ADDR (0xfef000)
        !            65: 
        !            66: /* Address of end of stack space.  */
        !            67: 
        !            68: #define STACK_END_ADDR (0x800000)
        !            69: 
        !            70: /* Stack grows downward.  */
        !            71: 
        !            72: #define INNER_THAN <
        !            73: 
        !            74: /* Sequence of bytes for breakpoint instruction.  */
        !            75: 
        !            76: #define BREAKPOINT {0xf2}
        !            77: 
        !            78: /* Amount PC must be decremented by after a breakpoint.
        !            79:    This is often the number of bytes in BREAKPOINT
        !            80:    but not always.  */
        !            81: 
        !            82: #define DECR_PC_AFTER_BREAK 0
        !            83: 
        !            84: /* Nonzero if instruction at PC is a return instruction.  */
        !            85: 
        !            86: #define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 1) == 0x12)
        !            87: 
        !            88: /* Return 1 if P points to an invalid floating point value.  */
        !            89: 
        !            90: #define INVALID_FLOAT(p, len) 0
        !            91: 
        !            92: /* Define this to say that the "svc" insn is followed by
        !            93:    codes in memory saying which kind of system call it is.  */
        !            94: 
        !            95: #define NS32K_SVC_IMMED_OPERANDS
        !            96: 
        !            97: /* Say how long (ordinary) registers are.  */
        !            98: 
        !            99: #define REGISTER_TYPE long
        !           100: 
        !           101: /* Number of machine registers */
        !           102: 
        !           103: #define NUM_REGS               25
        !           104: 
        !           105: #define NUM_GENERAL_REGS       8
        !           106: 
        !           107: /* Initializer for an array of names of registers.
        !           108:    There should be NUM_REGS strings in this initializer.  */
        !           109: 
        !           110: #define REGISTER_NAMES {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",        \
        !           111:                        "pc", "sp", "fp", "ps",                         \
        !           112:                        "fsr",                                          \
        !           113:                        "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
        !           114:                        "l0", "l1", "l2", "l3", "l4",                   \
        !           115:                        }
        !           116: 
        !           117: /* Register numbers of various important registers.
        !           118:    Note that some of these values are "real" register numbers,
        !           119:    and correspond to the general registers of the machine,
        !           120:    and some are "phony" register numbers which are too large
        !           121:    to be actual register numbers as far as the user is concerned
        !           122:    but do serve to get the desired values when passed to read_register.  */
        !           123: 
        !           124: #define AP_REGNUM FP_REGNUM
        !           125: #define FP_REGNUM 10           /* Contains address of executing stack frame */
        !           126: #define SP_REGNUM 9            /* Contains address of top of stack */
        !           127: #define PC_REGNUM 8            /* Contains program counter */
        !           128: #define PS_REGNUM 11           /* Contains processor status */
        !           129: #define FPS_REGNUM 12          /* Floating point status register */
        !           130: #define FP0_REGNUM 13          /* Floating point register 0 */
        !           131: #define LP0_REGNUM 21          /* Double register 0 (same as FP0) */
        !           132: 
        !           133: #define REGISTER_U_ADDR(addr, blockend, regno) \
        !           134: {                                                                      \
        !           135:   switch (regno) {                                                     \
        !           136:   case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:      \
        !           137:        addr = blockend + (R0 - regno) * sizeof (int); break;           \
        !           138:   case PC_REGNUM:                                                      \
        !           139:        addr = blockend + PC * sizeof (int); break;                     \
        !           140:   case SP_REGNUM:                                                      \
        !           141:        addr = blockend + SP * sizeof (int); break;                     \
        !           142:   case FP_REGNUM:                                                      \
        !           143:        addr = blockend + FP * sizeof (int); break;                     \
        !           144:   case PS_REGNUM:                                                      \
        !           145:        addr = blockend + 12 * sizeof (int); break;                     \
        !           146:   case FPS_REGNUM:                                                     \
        !           147:        addr = 108; break;                                              \
        !           148:   case FP0_REGNUM + 0: case FP0_REGNUM + 1:                            \
        !           149:   case FP0_REGNUM + 2: case FP0_REGNUM + 3:                            \
        !           150:   case FP0_REGNUM + 4: case FP0_REGNUM + 5:                            \
        !           151:   case FP0_REGNUM + 6: case FP0_REGNUM + 7:                            \
        !           152:        addr = 76 + (regno - FP0_REGNUM) * sizeof (float); break;       \
        !           153:   case LP0_REGNUM + 0: case LP0_REGNUM + 1:                            \
        !           154:   case LP0_REGNUM + 2: case LP0_REGNUM + 3:                            \
        !           155:        addr = 76 + (regno - LP0_REGNUM) * sizeof (double); break;      \
        !           156:   default:                                                             \
        !           157:        printf ("bad argument to REGISTER_U_ADDR %d\n", regno);         \
        !           158:        abort ();                                                       \
        !           159:   }                                                                    \
        !           160: }
        !           161: 
        !           162: /* Total amount of space needed to store our copies of the machine's
        !           163:    register state, the array `registers'.  */
        !           164: #define REGISTER_BYTES ((NUM_REGS - 4) * sizeof (int) + 4 * sizeof (double))
        !           165: 
        !           166: /* Index within `registers' of the first byte of the space for
        !           167:    register N.  */
        !           168: 
        !           169: #define REGISTER_BYTE(N) ((N) >= LP0_REGNUM ? \
        !           170:        LP0_REGNUM * 4 + ((N) - LP0_REGNUM) * 8 : (N) * 4)
        !           171: 
        !           172: /* Number of bytes of storage in the actual machine representation
        !           173:    for register N.  On the 32000, all regs are 4 bytes
        !           174:    except for the doubled floating registers. */
        !           175: 
        !           176: #define REGISTER_RAW_SIZE(N) ((N) >= LP0_REGNUM ? 8 : 4)
        !           177: 
        !           178: /* Number of bytes of storage in the program's representation
        !           179:    for register N.  On the 32000, all regs are 4 bytes
        !           180:    except for the doubled floating registers. */
        !           181: 
        !           182: #define REGISTER_VIRTUAL_SIZE(N) ((N) >= LP0_REGNUM ? 8 : 4)
        !           183: 
        !           184: /* Largest value REGISTER_RAW_SIZE can have.  */
        !           185: 
        !           186: #define MAX_REGISTER_RAW_SIZE 8
        !           187: 
        !           188: /* Largest value REGISTER_VIRTUAL_SIZE can have.  */
        !           189: 
        !           190: #define MAX_REGISTER_VIRTUAL_SIZE 8
        !           191: 
        !           192: /* Nonzero if register N requires conversion
        !           193:    from raw format to virtual format.  */
        !           194: 
        !           195: #define REGISTER_CONVERTIBLE(N) 0
        !           196: 
        !           197: /* Convert data from raw format for register REGNUM
        !           198:    to virtual format for register REGNUM.  */
        !           199: 
        !           200: #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO)    \
        !           201:   bcopy ((FROM), (TO), REGISTER_VIRTUAL_SIZE(REGNUM));
        !           202: 
        !           203: /* Convert data from virtual format for register REGNUM
        !           204:    to raw format for register REGNUM.  */
        !           205: 
        !           206: #define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO)        \
        !           207:   bcopy ((FROM), (TO), REGISTER_VIRTUAL_SIZE(REGNUM));
        !           208: 
        !           209: /* Return the GDB type object for the "standard" data type
        !           210:    of data in register N.  */
        !           211: 
        !           212: #define REGISTER_VIRTUAL_TYPE(N) \
        !           213:   ((N) >= FP0_REGNUM ?         \
        !           214:     ((N) >= LP0_REGNUM ?       \
        !           215:      builtin_type_double       \
        !           216:      : builtin_type_float)     \
        !           217:    : builtin_type_int) 
        !           218: 
        !           219: /* Extract from an array REGBUF containing the (raw) register state
        !           220:    a function return value of type TYPE, and copy that, in virtual format,
        !           221:    into VALBUF.  */
        !           222: 
        !           223: #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
        !           224:   bcopy (REGBUF, VALBUF, TYPE_LENGTH (TYPE))
        !           225: 
        !           226: /* Write into appropriate registers a function return value
        !           227:    of type TYPE, given in virtual format.  */
        !           228: 
        !           229: #define STORE_RETURN_VALUE(TYPE,VALBUF) \
        !           230:   write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
        !           231: 
        !           232: /* Extract from an array REGBUF containing the (raw) register state
        !           233:    the address in which a function should return its structure value,
        !           234:    as a CORE_ADDR (or an expression that can be used as one).  */
        !           235: 
        !           236: #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(int *)(REGBUF))
        !           237: 
        !           238: /* Describe the pointer in each stack frame to the previous stack frame
        !           239:    (its caller).  */
        !           240: 
        !           241: /* FRAME_CHAIN takes a frame's nominal address
        !           242:    and produces the frame's chain-pointer.
        !           243: 
        !           244:    FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address
        !           245:    and produces the nominal address of the caller frame.
        !           246: 
        !           247:    However, if FRAME_CHAIN_VALID returns zero,
        !           248:    it means the given frame is the outermost one and has no caller.
        !           249:    In that case, FRAME_CHAIN_COMBINE is not used.  */
        !           250: 
        !           251: /* In the case of the Merlin, the frame's nominal address is the FP value,
        !           252:    and at that address is saved previous FP value as a 4-byte word.  */
        !           253: 
        !           254: #define FRAME_CHAIN(thisframe)  (read_memory_integer (thisframe, 4))
        !           255: 
        !           256: #define FRAME_CHAIN_VALID(chain, thisframe) \
        !           257:   (chain != 0 && (FRAME_SAVED_PC (thisframe) >= first_object_file_end))
        !           258: 
        !           259: #define FRAME_CHAIN_COMBINE(chain, thisframe) (chain)
        !           260: 
        !           261: /* Define other aspects of the stack frame.  */
        !           262: 
        !           263: #define FRAME_SAVED_PC(frame) (read_memory_integer (frame + 4, 4))
        !           264: 
        !           265: /* compute base of arguments */
        !           266: #define FRAME_ARGS_ADDRESS(fi) ((fi).frame)
        !           267: 
        !           268: #define FRAME_LOCALS_ADDRESS(fi) ((fi).frame)
        !           269: 
        !           270: /* Return number of args passed to a frame.
        !           271:    Can return -1, meaning no way to tell.  */
        !           272: 
        !           273: #define FRAME_NUM_ARGS(numargs, fi)                    \
        !           274: { CORE_ADDR pc;                                                \
        !           275:   int insn;                                            \
        !           276:   int addr_mode;                                       \
        !           277:   int width;                                           \
        !           278:                                                        \
        !           279:   pc = FRAME_SAVED_PC (fi.frame);                      \
        !           280:   insn = read_memory_integer (pc,2);                   \
        !           281:   addr_mode = (insn >> 11) & 0x1f;                     \
        !           282:   insn = insn & 0x7ff;                                 \
        !           283:   if ((insn & 0x7fc) == 0x57c                          \
        !           284:       && addr_mode == 0x14) /* immediate */            \
        !           285:     { if (insn == 0x57c) /* adjspb */                  \
        !           286:        width = 1;                                      \
        !           287:       else if (insn == 0x57d) /* adjspw */             \
        !           288:        width = 2;                                      \
        !           289:       else if (insn == 0x57f) /* adjspd */             \
        !           290:        width = 4;                                      \
        !           291:       numargs = read_memory_integer (pc+2,width);      \
        !           292:       if (width > 1)                                   \
        !           293:        flip_bytes (&numargs, width);                   \
        !           294:       numargs = - sign_extend (numargs, width*8) / 4; }        \
        !           295:   else numargs = -1;                                   \
        !           296: }
        !           297: 
        !           298: /* Return number of bytes at start of arglist that are not really args.  */
        !           299: 
        !           300: #define FRAME_ARGS_SKIP 8
        !           301: 
        !           302: /* Put here the code to store, into a struct frame_saved_regs,
        !           303:    the addresses of the saved registers of frame described by FRAME_INFO.
        !           304:    This includes special registers such as pc and fp saved in special
        !           305:    ways in the stack frame.  sp is even more special:
        !           306:    the address we return for it IS the sp for the next frame.  */
        !           307: 
        !           308: #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
        !           309: { int regmask,regnum;                                          \
        !           310:   int localcount;                                              \
        !           311:   CORE_ADDR enter_addr;                                                \
        !           312:   CORE_ADDR next_addr;                                         \
        !           313:                                                                \
        !           314:   enter_addr = get_pc_function_start ((frame_info).pc);                \
        !           315:   regmask = read_memory_integer (enter_addr+1, 1);             \
        !           316:   localcount = ns32k_localcount (enter_addr);                  \
        !           317:   next_addr = (frame_info).frame + localcount;                 \
        !           318:   for (regnum = 0; regnum < 8; regnum++, regmask >>= 1)                \
        !           319:     (frame_saved_regs).regs[regnum]                            \
        !           320:       = (regmask & 1) ? (next_addr -= 4) : 0;                  \
        !           321:   (frame_saved_regs).regs[SP_REGNUM] = (frame_info).frame + 4; \
        !           322:   (frame_saved_regs).regs[PC_REGNUM] = (frame_info).frame + 4; \
        !           323:   (frame_saved_regs).regs[FP_REGNUM]                           \
        !           324:      = read_memory_integer ((frame_info).frame, 4); }
        !           325: 
        !           326: /* Compensate for lack of `vprintf' function.  */ 
        !           327: #define vprintf(format, ap) _doprnt (format, ap, stdout) 
        !           328: 
        !           329: /* Things needed for making the inferior call functions.  */
        !           330: 
        !           331: /* Push an empty stack frame, to record the current PC, etc.  */
        !           332: 
        !           333: #define PUSH_DUMMY_FRAME \
        !           334: { register CORE_ADDR sp = read_register (SP_REGNUM);   \
        !           335:   register int regnum;                                 \
        !           336:   sp = push_word (sp, read_register (PC_REGNUM));      \
        !           337:   sp = push_word (sp, read_register (FP_REGNUM));      \
        !           338:   write_register (FP_REGNUM, sp);                      \
        !           339:   for (regnum = 0; regnum < 8; regnum++)               \
        !           340:     sp = push_word (sp, read_register (regnum));       \
        !           341:   write_register (SP_REGNUM, sp);                      \
        !           342: }
        !           343: 
        !           344: /* Discard from the stack the innermost frame, restoring all registers.  */
        !           345: 
        !           346: #define POP_FRAME  \
        !           347: { register CORE_ADDR fp = read_register (FP_REGNUM);            \
        !           348:   register int regnum;                                          \
        !           349:   struct frame_saved_regs fsr;                                  \
        !           350:   struct frame_info fi;                                                 \
        !           351:   fi = get_frame_info (fp);                                     \
        !           352:   get_frame_saved_regs (&fi, &fsr);                             \
        !           353:   for (regnum = 0; regnum < 8; regnum++)                        \
        !           354:     if (fsr.regs[regnum])                                       \
        !           355:       write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \
        !           356:   write_register (FP_REGNUM, read_memory_integer (fp, 4));      \
        !           357:   write_register (PC_REGNUM, read_memory_integer (fp + 4, 4));   \
        !           358:   write_register (SP_REGNUM, fp + 8);                           \
        !           359: }
        !           360: 
        !           361: /* This sequence of words is the instructions
        !           362:      enter     0xff,0          82 ff 00
        !           363:      jsr       @0x00010203     7f ae c0 01 02 03
        !           364:      adjspd    0x69696969      7f a5 01 02 03 04
        !           365:      bpt                       f2
        !           366:    Note this is 16 bytes.  */
        !           367: 
        !           368: #define CALL_DUMMY { 0x7f00ff82, 0x0201c0ae, 0x01a57f03, 0xf2040302 }
        !           369: 
        !           370: #define CALL_DUMMY_START_OFFSET        3
        !           371: #define CALL_DUMMY_LENGTH      16
        !           372: #define CALL_DUMMY_ADDR                5
        !           373: #define CALL_DUMMY_NARGS       11
        !           374: 
        !           375: /* Insert the specified number of args and function address
        !           376:    into a call sequence of the above form stored at DUMMYNAME.  */
        !           377: 
        !           378: #define FIX_CALL_DUMMY(dummyname, fun, nargs)                  \
        !           379: { int flipped = fun | 0xc0000000;                              \
        !           380:   flip_bytes (&flipped, 4);                                    \
        !           381:   *((int *) (((char *) dummyname)+CALL_DUMMY_ADDR)) = flipped; \
        !           382:   flipped = - nargs * 4;                                       \
        !           383:   flip_bytes (&flipped, 4);                                    \
        !           384:   *((int *) (((char *) dummyname)+CALL_DUMMY_NARGS)) = flipped;        \
        !           385: }
        !           386: 
        !           387: #ifdef notdef
        !           388: /* Interface definitions for kernel debugger KDB.  */
        !           389: 
        !           390: /* Map machine fault codes into signal numbers.
        !           391:    First subtract 0, divide by 4, then index in a table.
        !           392:    Faults for which the entry in this table is 0
        !           393:    are not handled by KDB; the program's own trap handler
        !           394:    gets to handle then.  */
        !           395: 
        !           396: #define FAULT_CODE_ORIGIN 0
        !           397: #define FAULT_CODE_UNITS 4
        !           398: #define FAULT_TABLE    \
        !           399: { 0, SIGKILL, SIGSEGV, 0, 0, 0, 0, 0, \
        !           400:   0, 0, SIGTRAP, SIGTRAP, 0, 0, 0, 0, \
        !           401:   0, 0, 0, 0, 0, 0, 0, 0}
        !           402: 
        !           403: /* Start running with a stack stretching from BEG to END.
        !           404:    BEG and END should be symbols meaningful to the assembler.
        !           405:    This is used only for kdb.  */
        !           406: 
        !           407: #define INIT_STACK(beg, end)  \
        !           408: { asm (".globl end");         \
        !           409:   asm ("movl $ end, sp");      \
        !           410:   asm ("clrl fp"); }
        !           411: 
        !           412: /* Push the frame pointer register on the stack.  */
        !           413: #define PUSH_FRAME_PTR        \
        !           414:   asm ("pushl fp");
        !           415: 
        !           416: /* Copy the top-of-stack to the frame pointer register.  */
        !           417: #define POP_FRAME_PTR  \
        !           418:   asm ("movl (sp), fp");
        !           419: 
        !           420: /* After KDB is entered by a fault, push all registers
        !           421:    that GDB thinks about (all NUM_REGS of them),
        !           422:    so that they appear in order of ascending GDB register number.
        !           423:    The fault code will be on the stack beyond the last register.  */
        !           424: 
        !           425: #define PUSH_REGISTERS        \
        !           426: { asm ("pushl 8(sp)");        \
        !           427:   asm ("pushl 8(sp)");        \
        !           428:   asm ("pushal 0x14(sp)");    \
        !           429:   asm ("pushr $037777"); }
        !           430: 
        !           431: /* Assuming the registers (including processor status) have been
        !           432:    pushed on the stack in order of ascending GDB register number,
        !           433:    restore them and return to the address in the saved PC register.  */
        !           434: 
        !           435: #define POP_REGISTERS      \
        !           436: { asm ("popr $037777");    \
        !           437:   asm ("subl2 $8,(sp)");   \
        !           438:   asm ("movl (sp),sp");    \
        !           439:   asm ("rei"); }
        !           440: #endif

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