gdb/config/i386/tm-symmetry.h

   1 /* Target machine definitions for GDB on a Sequent Symmetry under dynix 3.0,
   2    with Weitek 1167 and i387 support.
   3    Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995
   4    Free Software Foundation, Inc.
   5    Symmetry version by Jay Vosburgh (fubar@sequent.com).
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330,
  22    Boston, MA 02111-1307, USA.  */
  23
  24 #ifndef TM_SYMMETRY_H
  25 #define TM_SYMMETRY_H 1
  26
  27 #include "regcache.h"
  28 #include "doublest.h"
  29
  30 /* I don't know if this will work for cross-debugging, even if you do get
  31    a copy of the right include file.  */
  32 #include <machine/reg.h>
  33
  34 #include "i386/tm-i386.h"
  35
  36 /* Amount PC must be decremented by after a breakpoint.  This is often the
  37    number of bytes in BREAKPOINT but not always (such as now). */
  38
  39 #undef DECR_PC_AFTER_BREAK
  40 #define DECR_PC_AFTER_BREAK 0
  41
  42 #if 0
  43 /* --- this code can't be used unless we know we are running native,
  44    since it uses host specific ptrace calls. */
  45 /* code for 80387 fpu.  Functions are from i386-dep.c, copied into
  46  * symm-dep.c.
  47  */
  48 #define FLOAT_INFO { i386_float_info(); }
  49 #endif
  50
  51 /* Number of machine registers */
  52
  53 #undef NUM_REGS
  54 #define NUM_REGS 49
  55
  56 /* Initializer for an array of names of registers.
  57    There should be NUM_REGS strings in this initializer.  */
  58
  59 /* Initializer for an array of names of registers.  There should be at least
  60    NUM_REGS strings in this initializer.  Any excess ones are simply ignored.
  61    Symmetry registers are in this weird order to match the register numbers
  62    in the symbol table entries.  If you change the order, things will probably
  63    break mysteriously for no apparent reason.  Also note that the st(0)...
  64    st(7) 387 registers are represented as st0...st7.  */
  65
  66 #undef REGISTER_NAME
  67 #define REGISTER_NAMES {     "eax",  "edx",  "ecx",   "st0",  "st1", \
  68                              "ebx",  "esi",  "edi",   "st2",  "st3", \
  69                              "st4",  "st5",  "st6",   "st7",  "esp", \
  70                              "ebp",  "eip",  "eflags","fp1",  "fp2", \
  71                              "fp3",  "fp4",  "fp5",   "fp6",  "fp7", \
  72                              "fp8",  "fp9",  "fp10",  "fp11", "fp12", \
  73                              "fp13", "fp14", "fp15",  "fp16", "fp17", \
  74                              "fp18", "fp19", "fp20",  "fp21", "fp22", \
  75                              "fp23", "fp24", "fp25",  "fp26", "fp27", \
  76                              "fp28", "fp29", "fp30",  "fp31" }
  77
  78 /* Register numbers of various important registers.
  79    Note that some of these values are "real" register numbers,
  80    and correspond to the general registers of the machine,
  81    and some are "phony" register numbers which are too large
  82    to be actual register numbers as far as the user is concerned
  83    but do serve to get the desired values when passed to read_register.  */
  84
  85 #define EAX_REGNUM      0
  86 #define EDX_REGNUM      1
  87 #define ECX_REGNUM      2
  88 #define ST0_REGNUM      3
  89 #define ST1_REGNUM      4
  90 #define EBX_REGNUM      5
  91 #define ESI_REGNUM      6
  92 #define EDI_REGNUM      7
  93 #define ST2_REGNUM      8
  94 #define ST3_REGNUM      9
  95
  96 #define ST4_REGNUM      10
  97 #define ST5_REGNUM      11
  98 #define ST6_REGNUM      12
  99 #define ST7_REGNUM      13
 100
 101 #define FP1_REGNUM 18           /* first 1167 register */
 102 /* Get %fp2 - %fp31 by addition, since they are contiguous */
 103
 104 #undef  SP_REGNUM
 105 #define SP_REGNUM 14            /* (usp) Contains address of top of stack */
 106 #define ESP_REGNUM 14
 107 #undef  FP_REGNUM
 108 #define FP_REGNUM 15            /* (ebp) Contains address of executing stack frame */
 109 #define EBP_REGNUM 15
 110 #undef  PC_REGNUM
 111 #define PC_REGNUM 16            /* (eip) Contains program counter */
 112 #define EIP_REGNUM 16
 113 #undef  PS_REGNUM
 114 #define PS_REGNUM 17            /* (ps)  Contains processor status */
 115 #define EFLAGS_REGNUM 17
 116
 117 /*
 118  * Following macro translates i386 opcode register numbers to Symmetry
 119  * register numbers.  This is used by i386_frame_find_saved_regs.
 120  *
 121  *           %eax  %ecx  %edx  %ebx  %esp  %ebp  %esi  %edi
 122  * i386        0     1     2     3     4     5     6     7
 123  * Symmetry    0     2     1     5    14    15     6     7
 124  *
 125  */
 126 #define I386_REGNO_TO_SYMMETRY(n) \
 127 ((n)==0?0 :(n)==1?2 :(n)==2?1 :(n)==3?5 :(n)==4?14 :(n)==5?15 :(n))
 128
 129 /* The magic numbers below are offsets into u_ar0 in the user struct.
 130  * They live in <machine/reg.h>.  Gdb calls this macro with blockend
 131  * holding u.u_ar0 - KERNEL_U_ADDR.  Only the registers listed are
 132  * saved in the u area (along with a few others that aren't useful
 133  * here.  See <machine/reg.h>).
 134  */
 135
 136 #define REGISTER_U_ADDR(addr, blockend, regno) \
 137 { struct user foo;      /* needed for finding fpu regs */ \
 138 switch (regno) { \
 139     case 0: \
 140       addr = blockend + EAX * sizeof(int); break; \
 141   case 1: \
 142       addr = blockend + EDX * sizeof(int); break; \
 143   case 2: \
 144       addr = blockend + ECX * sizeof(int); break; \
 145   case 3:                       /* st(0) */ \
 146       addr = ((int)&foo.u_fpusave.fpu_stack[0][0] - (int)&foo); \
 147       break; \
 148   case 4:                       /* st(1) */ \
 149       addr = ((int) &foo.u_fpusave.fpu_stack[1][0] - (int)&foo); \
 150       break; \
 151   case 5: \
 152       addr = blockend + EBX * sizeof(int); break; \
 153   case 6: \
 154       addr = blockend + ESI * sizeof(int); break; \
 155   case 7: \
 156       addr = blockend + EDI * sizeof(int); break; \
 157   case 8:                       /* st(2) */ \
 158       addr = ((int) &foo.u_fpusave.fpu_stack[2][0] - (int)&foo); \
 159       break; \
 160   case 9:                       /* st(3) */ \
 161       addr = ((int) &foo.u_fpusave.fpu_stack[3][0] - (int)&foo); \
 162       break; \
 163   case 10:                      /* st(4) */ \
 164       addr = ((int) &foo.u_fpusave.fpu_stack[4][0] - (int)&foo); \
 165       break; \
 166   case 11:                      /* st(5) */ \
 167       addr = ((int) &foo.u_fpusave.fpu_stack[5][0] - (int)&foo); \
 168       break; \
 169   case 12:                      /* st(6) */ \
 170       addr = ((int) &foo.u_fpusave.fpu_stack[6][0] - (int)&foo); \
 171       break; \
 172   case 13:                      /* st(7) */ \
 173       addr = ((int) &foo.u_fpusave.fpu_stack[7][0] - (int)&foo); \
 174       break; \
 175   case 14: \
 176       addr = blockend + ESP * sizeof(int); break; \
 177   case 15: \
 178       addr = blockend + EBP * sizeof(int); break; \
 179   case 16: \
 180       addr = blockend + EIP * sizeof(int); break; \
 181   case 17: \
 182       addr = blockend + FLAGS * sizeof(int); break; \
 183   case 18:                      /* fp1 */ \
 184   case 19:                      /* fp2 */ \
 185   case 20:                      /* fp3 */ \
 186   case 21:                      /* fp4 */ \
 187   case 22:                      /* fp5 */ \
 188   case 23:                      /* fp6 */ \
 189   case 24:                      /* fp7 */ \
 190   case 25:                      /* fp8 */ \
 191   case 26:                      /* fp9 */ \
 192   case 27:                      /* fp10 */ \
 193   case 28:                      /* fp11 */ \
 194   case 29:                      /* fp12 */ \
 195   case 30:                      /* fp13 */ \
 196   case 31:                      /* fp14 */ \
 197   case 32:                      /* fp15 */ \
 198   case 33:                      /* fp16 */ \
 199   case 34:                      /* fp17 */ \
 200   case 35:                      /* fp18 */ \
 201   case 36:                      /* fp19 */ \
 202   case 37:                      /* fp20 */ \
 203   case 38:                      /* fp21 */ \
 204   case 39:                      /* fp22 */ \
 205   case 40:                      /* fp23 */ \
 206   case 41:                      /* fp24 */ \
 207   case 42:                      /* fp25 */ \
 208   case 43:                      /* fp26 */ \
 209   case 44:                      /* fp27 */ \
 210   case 45:                      /* fp28 */ \
 211   case 46:                      /* fp29 */ \
 212   case 47:                      /* fp30 */ \
 213   case 48:                      /* fp31 */ \
 214      addr = ((int) &foo.u_fpasave.fpa_regs[(regno)-18] - (int)&foo); \
 215   } \
 216 }
 217
 218 /* Total amount of space needed to store our copies of the machine's
 219    register state, the array `registers'.  10 i*86 registers, 8 i387
 220    registers, and 31 Weitek 1167 registers */
 221
 222 #undef  REGISTER_BYTES
 223 #define REGISTER_BYTES ((10 * 4) + (8 * 10) + (31 * 4))
 224
 225 /* Nonzero if register N requires conversion
 226    from raw format to virtual format.  */
 227
 228 #undef  REGISTER_CONVERTIBLE
 229 #define REGISTER_CONVERTIBLE(N) \
 230 (((N) < 3) ? 0 : \
 231 ((N) < 5) ? 1  : \
 232 ((N) < 8) ? 0  : \
 233 ((N) < 14) ? 1 : \
 234     0)
 235
 236 #include "floatformat.h"
 237
 238 /* Convert data from raw format for register REGNUM in buffer FROM
 239    to virtual format with type TYPE in buffer TO.  */
 240
 241 #undef REGISTER_CONVERT_TO_VIRTUAL
 242 #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
 243 { \
 244   DOUBLEST val; \
 245   floatformat_to_doublest (&floatformat_i387_ext, (FROM), &val); \
 246   store_floating ((TO), TYPE_LENGTH (TYPE), val); \
 247 }
 248
 249 /* Convert data from virtual format with type TYPE in buffer FROM
 250    to raw format for register REGNUM in buffer TO.  */
 251
 252 #undef REGISTER_CONVERT_TO_RAW
 253 #define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
 254 { \
 255   DOUBLEST val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
 256   floatformat_from_doublest (&floatformat_i387_ext, &val, (TO)); \
 257 }
 258
 259 /* Return the GDB type object for the "standard" data type
 260    of data in register N.  */
 261
 262 #undef REGISTER_VIRTUAL_TYPE
 263 #define REGISTER_VIRTUAL_TYPE(N) \
 264 ((N < 3) ? builtin_type_int : \
 265 (N < 5) ? builtin_type_double : \
 266 (N < 8) ? builtin_type_int : \
 267 (N < 14) ? builtin_type_double : \
 268     builtin_type_int)
 269
 270 /* Store the address of the place in which to copy the structure the
 271    subroutine will return.  This is called from call_function.
 272    Native cc passes the address in eax, gcc (up to version 2.5.8)
 273    passes it on the stack.  gcc should be fixed in future versions to
 274    adopt native cc conventions.  */
 275
 276 #undef  PUSH_ARGUMENTS
 277 #undef  STORE_STRUCT_RETURN
 278 #define STORE_STRUCT_RETURN(ADDR, SP) write_register(0, (ADDR))
 279
 280 /* Extract from an array REGBUF containing the (raw) register state
 281    a function return value of type TYPE, and copy that, in virtual format,
 282    into VALBUF.  */
 283
 284 #undef  DEPRECATED_EXTRACT_RETURN_VALUE
 285 #define DEPRECATED_EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 286   symmetry_extract_return_value(TYPE, REGBUF, VALBUF)
 287
 288 /* The following redefines make backtracing through sigtramp work.
 289    They manufacture a fake sigtramp frame and obtain the saved pc in sigtramp
 290    from the sigcontext structure which is pushed by the kernel on the
 291    user stack, along with a pointer to it.  */
 292
 293 #define IN_SIGTRAMP(pc, name) ((name) && STREQ ("_sigcode", name))
 294
 295 /* Offset to saved PC in sigcontext, from <signal.h>.  */
 296 #define SIGCONTEXT_PC_OFFSET 16
 297
 298 #endif /* ifndef TM_SYMMETRY_H */