210 lines
6.6 KiB
C
210 lines
6.6 KiB
C
/* Target-dependent definitions for Intel x86 running DJGPP.
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Copyright 1995, 1996, 1997 Free Software Foundation, Inc.
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This file is part of GDB.
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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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "i386/tm-i386v.h"
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/* Number of machine registers. */
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#undef NUM_FREGS
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#define NUM_FREGS 15
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#undef NUM_REGS
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#define NUM_REGS (16+NUM_FREGS)
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/* Initializer for an array of names of registers. There should be
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NUM_REGS strings in this initializer. */
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/* The order of the first 8 registers must match the compiler's
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numbering scheme (which is the same as the 386 scheme). */
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#undef REGISTER_NAMES
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#define REGISTER_NAMES { "eax", "ecx", "edx", "ebx", \
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"esp", "ebp", "esi", "edi", \
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"eip", "eflags","cs", "ss", \
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"ds", "es", "fs", "gs", \
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"st0", "st1", "st2", "st3", \
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"st4", "st5", "st6", "st7", \
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"fctrl","fstat", "ftag", "fcs", \
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"fopsel","fip", "fopoff" }
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#undef FP_REGNUM
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#define FP_REGNUM 5 /* (ebp) Contains addr of stack frame */
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#undef SP_REGNUM
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#define SP_REGNUM 4 /* (usp) Contains address of top of stack */
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#undef PS_REGNUM
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#define PS_REGNUM 9 /* (ps) Contains processor status */
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#undef PC_REGNUM
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#define PC_REGNUM 8 /* (eip) Contains program counter */
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#undef FP0_REGNUM
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#define FP0_REGNUM 16 /* Floating point register 0 */
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#undef FPC_REGNUM
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#define FPC_REGNUM 24 /* 80387 control register */
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#undef FPCWD_REGNUM
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#define FPCWD_REGNUM FPC_REGNUM
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#undef FPSWD_REGNUM
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#define FPSWD_REGNUM 25 /* 80387 status register */
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#undef FPTWD_REGNUM
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#define FPTWD_REGNUM 26 /* 80387 tag register */
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#undef FPIPO_REGNUM
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#define FPIPO_REGNUM 29 /* 80387 instruction pointer offset reg */
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#undef FPIPS_REGNUM
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#define FPIPS_REGNUM 27 /* 80387 instruction pointer selector reg */
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#undef FPOOS_REGNUM
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#define FPOOS_REGNUM 30 /* 80387 operand pointer offset reg */
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#undef FPOPS_REGNUM
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#define FPOPS_REGNUM 28 /* 80387 operand pointer selector reg */
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/* Total amount of space needed to store our copies of the machine's
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register state, the array `registers'. */
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#undef REGISTER_BYTES
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#define REGISTER_BYTES (10*4 + 6*2 + 8*10 + 5*2 + 2*4)
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/* Index within `registers' of the first byte of the space for
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register N. */
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#undef REGISTER_BYTE
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#define REGBYTE_0 0
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#define REGBYTE_10 (REGBYTE_0+10*4)
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#define REGBYTE_16 (REGBYTE_10+6*2)
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#define REGBYTE_24 (REGBYTE_16+8*10)
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#define REGBYTE_29 (REGBYTE_24+5*2)
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#define REGISTER_BYTE(N) (((N) < 10) ? (N) * 4 : \
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(N) < 16 ? REGBYTE_10 +((N) - 10) * 2 : \
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(N) < 24 ? REGBYTE_16 +((N) - 16) * 10 : \
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(N) < 29 ? REGBYTE_24 +((N) - 24) * 2 : \
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REGBYTE_29 + ((N) - 29) * 4)
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/* Number of bytes of storage in the actual machine representation
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for register N. */
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#undef REGISTER_RAW_SIZE
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#define REGISTER_RAW_SIZE(N) ((N) < 10 ? 4 : (N) < 16 ? 2 : (N) < 24 ? 10 : \
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(N) < 29 ? 2 : 4)
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/* Number of bytes of storage in the program's representation
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for register N. */
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#undef REGISTER_VIRTUAL_SIZE
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#define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N)
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/* Largest value REGISTER_RAW_SIZE can have. */
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#undef MAX_REGISTER_RAW_SIZE
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#define MAX_REGISTER_RAW_SIZE 10
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/* Largest value REGISTER_VIRTUAL_SIZE can have. */
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#undef MAX_REGISTER_VIRTUAL_SIZE
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#define MAX_REGISTER_VIRTUAL_SIZE 10
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/* Nonzero if register N requires conversion
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from raw format to virtual format. */
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#undef REGISTER_CONVERTIBLE
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#define REGISTER_CONVERTIBLE(N) ((N) < FP0_REGNUM ? 0 :\
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(N) < FPC_REGNUM ? 1 : 0)
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/* The host and target are i386 machines and the compiler supports
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long doubles. Long doubles on the host therefore have the same
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layout as a 387 FPU stack register. */
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#if defined(HAVE_LONG_DOUBLE) && defined(HOST_I386)
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#undef LD_I387
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#define LD_I387
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#endif
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/* Allow floating point numbers to be specified by a raw long double
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10 hex bytes number, e.g. 1.0 can be input as
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0x3fff8000000000000000 */
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#ifdef LD_I387
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#define HEX_LONG_DOUBLE_INPUT(base,p,len,target) \
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((base) == 16 && (len) == 20 \
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&& i387_hex_long_double_input ((p), (target)))
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#endif
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extern int i387_hex_long_double_input (char *p, long double *putithere);
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#undef REGISTER_CONVERT_TO_VIRTUAL
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#ifdef LD_I387
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#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
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{ \
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if (TYPE == REGISTER_VIRTUAL_TYPE (REGNUM)) \
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{ \
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memcpy (TO, FROM, TYPE_LENGTH (TYPE)); \
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} \
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else \
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{ \
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long double val = *((long double *)FROM); \
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store_floating ((TO), TYPE_LENGTH (TYPE), val); \
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} \
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}
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#else
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/* Convert data from raw format for register REGNUM in buffer FROM to
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virtual format with type TYPE in buffer TO. */
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#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
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{ \
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double val; \
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i387_to_double ((FROM), (char *)&val); \
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store_floating ((TO), TYPE_LENGTH (TYPE), val); \
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}
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#endif
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extern void i387_to_double PARAMS ((char *, char *));
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#undef REGISTER_CONVERT_TO_RAW
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#ifdef LD_I387
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#define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
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{ \
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if (TYPE == REGISTER_VIRTUAL_TYPE (REGNUM)) \
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{ \
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memcpy (TO, FROM, TYPE_LENGTH (TYPE)); \
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} \
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else \
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{ \
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long double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
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*((long double *)TO) = val; \
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} \
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}
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#else
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#define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
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{ \
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double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
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double_to_i387((char *)&val, (TO)); \
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}
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#endif
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extern void double_to_i387 PARAMS ((char *, char *));
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/* Return the GDB type object for the "standard" data type of data in
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register N. */
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#undef REGISTER_VIRTUAL_TYPE
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#ifdef LD_I387
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#define REGISTER_VIRTUAL_TYPE(N) \
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((N < FP0_REGNUM) ? builtin_type_int : \
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(N < FPC_REGNUM) ? builtin_type_long_double : builtin_type_int)
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#else
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#define REGISTER_VIRTUAL_TYPE(N) \
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((N < FP0_REGNUM) ? builtin_type_int : \
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(N < FPC_REGNUM) ? builtin_type_double : builtin_type_int)
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#endif
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#undef TARGET_LONG_DOUBLE_BIT
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#define TARGET_LONG_DOUBLE_BIT 96
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