[thirdparty/binutils-gdb.git] / gdb / config / i386 / tm-symmetry.h

/* Target machine definitions for GDB on a Sequent Symmetry under dynix 3.0,
   with Weitek 1167 and i387 support.
   Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994
   Free Software Foundation, Inc.
   Symmetry version by Jay Vosburgh (fubar@sequent.com).

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#ifndef TM_SYMMETRY_H
#define TM_SYMMETRY_H 1

/* I don't know if this will work for cross-debugging, even if you do get
   a copy of the right include file.  */
#include <machine/reg.h>

#include "i386/tm-i386v.h"

#undef START_INFERIOR_TRAPS_EXPECTED
#define START_INFERIOR_TRAPS_EXPECTED 2

/* Amount PC must be decremented by after a breakpoint.  This is often the
   number of bytes in BREAKPOINT but not always (such as now). */

#undef DECR_PC_AFTER_BREAK
#define DECR_PC_AFTER_BREAK 0

#if 0
/* --- this code can't be used unless we know we are running native,
   since it uses host specific ptrace calls. */
/* code for 80387 fpu.  Functions are from i386-dep.c, copied into
 * symm-dep.c.
 */
#define FLOAT_INFO { i386_float_info(); }
#endif

/* Number of machine registers */

#undef NUM_REGS
#define NUM_REGS 49

/* Initializer for an array of names of registers.
   There should be NUM_REGS strings in this initializer.  */

/* Initializer for an array of names of registers.  There should be at least
   NUM_REGS strings in this initializer.  Any excess ones are simply ignored.
   Symmetry registers are in this weird order to match the register numbers
   in the symbol table entries.  If you change the order, things will probably
   break mysteriously for no apparent reason.  Also note that the st(0)...
   st(7) 387 registers are represented as st0...st7.  */

#undef  REGISTER_NAMES
#define REGISTER_NAMES {     "eax",  "edx",  "ecx",   "st0",  "st1", \
			     "ebx",  "esi",  "edi",   "st2",  "st3", \
			     "st4",  "st5",  "st6",   "st7",  "esp", \
			     "ebp",  "eip",  "eflags","fp1",  "fp2", \
			     "fp3",  "fp4",  "fp5",   "fp6",  "fp7", \
			     "fp8",  "fp9",  "fp10",  "fp11", "fp12", \
			     "fp13", "fp14", "fp15",  "fp16", "fp17", \
			     "fp18", "fp19", "fp20",  "fp21", "fp22", \
			     "fp23", "fp24", "fp25",  "fp26", "fp27", \
			     "fp28", "fp29", "fp30",  "fp31" }

/* Register numbers of various important registers.
   Note that some of these values are "real" register numbers,
   and correspond to the general registers of the machine,
   and some are "phony" register numbers which are too large
   to be actual register numbers as far as the user is concerned
   but do serve to get the desired values when passed to read_register.  */

#define EAX_REGNUM	0
#define EDX_REGNUM	1
#define ECX_REGNUM	2
#define ST0_REGNUM	3
#define ST1_REGNUM	4
#define EBX_REGNUM	5
#define ESI_REGNUM	6
#define EDI_REGNUM	7
#define ST2_REGNUM	8
#define ST3_REGNUM	9

#define ST4_REGNUM	10
#define ST5_REGNUM	11
#define ST6_REGNUM	12
#define ST7_REGNUM	13

#define FP1_REGNUM 18		/* first 1167 register */
/* Get %fp2 - %fp31 by addition, since they are contiguous */

#undef  SP_REGNUM
#define SP_REGNUM 14		/* (usp) Contains address of top of stack */
#define ESP_REGNUM 14
#undef  FP_REGNUM
#define FP_REGNUM 15		/* (ebp) Contains address of executing stack frame */
#define EBP_REGNUM 15
#undef  PC_REGNUM
#define PC_REGNUM 16		/* (eip) Contains program counter */
#define EIP_REGNUM 16
#undef  PS_REGNUM
#define PS_REGNUM 17		/* (ps)  Contains processor status */
#define EFLAGS_REGNUM 17

/*
 * Following macro translates i386 opcode register numbers to Symmetry
 * register numbers.  This is used by i386_frame_find_saved_regs.
 *
 *           %eax  %ecx  %edx  %ebx  %esp  %ebp  %esi  %edi
 * i386        0     1     2     3     4     5     6     7
 * Symmetry    0     2     1     5    14    15     6     7
 *
 */
#define I386_REGNO_TO_SYMMETRY(n) \
((n)==0?0 :(n)==1?2 :(n)==2?1 :(n)==3?5 :(n)==4?14 :(n)==5?15 :(n))

/* The magic numbers below are offsets into u_ar0 in the user struct.
 * They live in <machine/reg.h>.  Gdb calls this macro with blockend
 * holding u.u_ar0 - KERNEL_U_ADDR.  Only the registers listed are
 * saved in the u area (along with a few others that aren't useful
 * here.  See <machine/reg.h>).
 */

#define REGISTER_U_ADDR(addr, blockend, regno) \
{ struct user foo;	/* needed for finding fpu regs */ \
switch (regno) { \
    case 0: \
      addr = blockend + EAX * sizeof(int); break; \
  case 1: \
      addr = blockend + EDX * sizeof(int); break; \
  case 2: \
      addr = blockend + ECX * sizeof(int); break; \
  case 3:			/* st(0) */ \
      addr = ((int)&foo.u_fpusave.fpu_stack[0][0] - (int)&foo); \
      break; \
  case 4:			/* st(1) */ \
      addr = ((int) &foo.u_fpusave.fpu_stack[1][0] - (int)&foo); \
      break; \
  case 5: \
      addr = blockend + EBX * sizeof(int); break; \
  case 6: \
      addr = blockend + ESI * sizeof(int); break; \
  case 7: \
      addr = blockend + EDI * sizeof(int); break; \
  case 8:			/* st(2) */ \
      addr = ((int) &foo.u_fpusave.fpu_stack[2][0] - (int)&foo); \
      break; \
  case 9:			/* st(3) */ \
      addr = ((int) &foo.u_fpusave.fpu_stack[3][0] - (int)&foo); \
      break; \
  case 10:			/* st(4) */ \
      addr = ((int) &foo.u_fpusave.fpu_stack[4][0] - (int)&foo); \
      break; \
  case 11:			/* st(5) */ \
      addr = ((int) &foo.u_fpusave.fpu_stack[5][0] - (int)&foo); \
      break; \
  case 12:			/* st(6) */ \
      addr = ((int) &foo.u_fpusave.fpu_stack[6][0] - (int)&foo); \
      break; \
  case 13:			/* st(7) */ \
      addr = ((int) &foo.u_fpusave.fpu_stack[7][0] - (int)&foo); \
      break; \
  case 14: \
      addr = blockend + ESP * sizeof(int); break; \
  case 15: \
      addr = blockend + EBP * sizeof(int); break; \
  case 16: \
      addr = blockend + EIP * sizeof(int); break; \
  case 17: \
      addr = blockend + FLAGS * sizeof(int); break; \
  case 18:			/* fp1 */ \
  case 19:			/* fp2 */ \
  case 20:			/* fp3 */ \
  case 21:			/* fp4 */ \
  case 22:			/* fp5 */ \
  case 23:			/* fp6 */ \
  case 24:			/* fp7 */ \
  case 25:			/* fp8 */ \
  case 26:			/* fp9 */ \
  case 27:			/* fp10 */ \
  case 28:			/* fp11 */ \
  case 29:			/* fp12 */ \
  case 30:			/* fp13 */ \
  case 31:			/* fp14 */ \
  case 32:			/* fp15 */ \
  case 33:			/* fp16 */ \
  case 34:			/* fp17 */ \
  case 35:			/* fp18 */ \
  case 36:			/* fp19 */ \
  case 37:			/* fp20 */ \
  case 38:			/* fp21 */ \
  case 39:			/* fp22 */ \
  case 40:			/* fp23 */ \
  case 41:			/* fp24 */ \
  case 42:			/* fp25 */ \
  case 43:			/* fp26 */ \
  case 44:			/* fp27 */ \
  case 45:			/* fp28 */ \
  case 46:			/* fp29 */ \
  case 47:			/* fp30 */ \
  case 48:			/* fp31 */ \
     addr = ((int) &foo.u_fpasave.fpa_regs[(regno)-18] - (int)&foo); \
  } \
}

/* Total amount of space needed to store our copies of the machine's
   register state, the array `registers'.  10 i*86 registers, 8 i387
   registers, and 31 Weitek 1167 registers */

#undef  REGISTER_BYTES
#define REGISTER_BYTES ((10 * 4) + (8 * 10) + (31 * 4))

/* Index within `registers' of the first byte of the space for
   register N.  */

#undef  REGISTER_BYTE
#define REGISTER_BYTE(N) 		\
(((N) < 3) ? ((N) * 4) :		\
((N) < 5) ? ((((N) - 2) * 10) + 2) :	\
((N) < 8) ? ((((N) - 5) * 4) + 32) :	\
((N) < 14) ? ((((N) - 8) * 10) + 44) :	\
    ((((N) - 14) * 4) + 104))

/* Number of bytes of storage in the actual machine representation
 * for register N.  All registers are 4 bytes, except 387 st(0) - st(7),
 * which are 80 bits each. 
 */

#undef  REGISTER_RAW_SIZE
#define REGISTER_RAW_SIZE(N) \
(((N) < 3) ? 4 :	\
((N) < 5) ? 10 :	\
((N) < 8) ? 4 :		\
((N) < 14) ? 10 :	\
    4)

/* Nonzero if register N requires conversion
   from raw format to virtual format.  */

#undef  REGISTER_CONVERTIBLE
#define REGISTER_CONVERTIBLE(N) \
(((N) < 3) ? 0 : \
((N) < 5) ? 1  : \
((N) < 8) ? 0  : \
((N) < 14) ? 1 : \
    0)

#include "floatformat.h"

/* Convert data from raw format for register REGNUM in buffer FROM
   to virtual format with type TYPE in buffer TO.  */

#undef REGISTER_CONVERT_TO_VIRTUAL
#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
{ \
  double val; \
  floatformat_to_double (&floatformat_i387_ext, (FROM), &val); \
  store_floating ((TO), TYPE_LENGTH (TYPE), val); \
}

/* Convert data from virtual format with type TYPE in buffer FROM
   to raw format for register REGNUM in buffer TO.  */

#undef REGISTER_CONVERT_TO_RAW
#define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
{ \
  double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
  floatformat_from_double (&floatformat_i387_ext, &val, (TO)); \
}

/* Return the GDB type object for the "standard" data type
   of data in register N.  */

#undef REGISTER_VIRTUAL_TYPE
#define REGISTER_VIRTUAL_TYPE(N) \
((N < 3) ? builtin_type_int : \
(N < 5) ? builtin_type_double : \
(N < 8) ? builtin_type_int : \
(N < 14) ? builtin_type_double : \
    builtin_type_int)

/* Store the address of the place in which to copy the structure the
   subroutine will return.  This is called from call_function.
   Native cc passes the address in eax, gcc (up to version 2.5.8)
   passes it on the stack.  gcc should be fixed in future versions to
   adopt native cc conventions.  */

#undef  STORE_STRUCT_RETURN
#define STORE_STRUCT_RETURN(ADDR, SP) write_register(0, (ADDR))

/* Extract from an array REGBUF containing the (raw) register state
   a function return value of type TYPE, and copy that, in virtual format,
   into VALBUF.  */

#undef  EXTRACT_RETURN_VALUE
#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
  symmetry_extract_return_value(TYPE, REGBUF, VALBUF)

/* The following redefines make backtracing through sigtramp work.
   They manufacture a fake sigtramp frame and obtain the saved pc in sigtramp
   from the sigcontext structure which is pushed by the kernel on the
   user stack, along with a pointer to it.  */

#define IN_SIGTRAMP(pc, name) ((name) && STREQ ("_sigcode", name))

/* Offset to saved PC in sigcontext, from <signal.h>.  */
#define SIGCONTEXT_PC_OFFSET 16

#endif /* ifndef TM_SYMMETRY_H */
Commit	Line	Data
c906108c SS	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
	4	Free Software Foundation, Inc.
	5	Symmetry version by Jay Vosburgh (fubar@sequent.com).
	6
c5aa993b	7	This file is part of GDB.
c906108c	8
c5aa993b JM	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.
c906108c	13
c5aa993b JM	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.
c906108c	18
c5aa993b JM	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. */
c906108c SS	23
	24	#ifndef TM_SYMMETRY_H
	25	#define TM_SYMMETRY_H 1
	26
	27	/* I don't know if this will work for cross-debugging, even if you do get
	28	a copy of the right include file. */
	29	#include <machine/reg.h>
	30
	31	#include "i386/tm-i386v.h"
	32
	33	#undef START_INFERIOR_TRAPS_EXPECTED
	34	#define START_INFERIOR_TRAPS_EXPECTED 2
	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,
c5aa993b	44	since it uses host specific ptrace calls. */
c906108c SS	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_NAMES
	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
c5aa993b	105	#define SP_REGNUM 14 /* (usp) Contains address of top of stack */
c906108c SS	106	#define ESP_REGNUM 14
c906108c SS	107	#undef FP_REGNUM
c5aa993b	108	#define FP_REGNUM 15 /* (ebp) Contains address of executing stack frame */
c906108c SS	109	#define EBP_REGNUM 15
c906108c SS	110	#undef PC_REGNUM
c5aa993b	111	#define PC_REGNUM 16 /* (eip) Contains program counter */
c906108c SS	112	#define EIP_REGNUM 16
c906108c SS	113	#undef PS_REGNUM
c5aa993b	114	#define PS_REGNUM 17 /* (ps) Contains processor status */
c906108c SS	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	/* Index within `registers' of the first byte of the space for
226	register N. */
227
228	#undef REGISTER_BYTE
229	#define REGISTER_BYTE(N) \
230	(((N) < 3) ? ((N) * 4) : \
231	((N) < 5) ? ((((N) - 2) * 10) + 2) : \
232	((N) < 8) ? ((((N) - 5) * 4) + 32) : \
233	((N) < 14) ? ((((N) - 8) * 10) + 44) : \
234	((((N) - 14) * 4) + 104))
235
236	/* Number of bytes of storage in the actual machine representation
237	* for register N. All registers are 4 bytes, except 387 st(0) - st(7),
238	* which are 80 bits each.
239	*/
240
241	#undef REGISTER_RAW_SIZE
242	#define REGISTER_RAW_SIZE(N) \
243	(((N) < 3) ? 4 : \
244	((N) < 5) ? 10 : \
245	((N) < 8) ? 4 : \
246	((N) < 14) ? 10 : \
247	4)
248
249	/* Nonzero if register N requires conversion
250	from raw format to virtual format. */
251
252	#undef REGISTER_CONVERTIBLE
253	#define REGISTER_CONVERTIBLE(N) \
254	(((N) < 3) ? 0 : \
255	((N) < 5) ? 1 : \
256	((N) < 8) ? 0 : \
257	((N) < 14) ? 1 : \
258	0)
259
260	#include "floatformat.h"
261
262	/* Convert data from raw format for register REGNUM in buffer FROM
263	to virtual format with type TYPE in buffer TO. */
264
265	#undef REGISTER_CONVERT_TO_VIRTUAL
266	#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
267	{ \
268	double val; \
269	floatformat_to_double (&floatformat_i387_ext, (FROM), &val); \
270	store_floating ((TO), TYPE_LENGTH (TYPE), val); \
271	}
272
273	/* Convert data from virtual format with type TYPE in buffer FROM
274	to raw format for register REGNUM in buffer TO. */
275
276	#undef REGISTER_CONVERT_TO_RAW
277	#define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
278	{ \
279	double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
280	floatformat_from_double (&floatformat_i387_ext, &val, (TO)); \
281	}
282
283	/* Return the GDB type object for the "standard" data type
284	of data in register N. */
285
286	#undef REGISTER_VIRTUAL_TYPE
287	#define REGISTER_VIRTUAL_TYPE(N) \
288	((N < 3) ? builtin_type_int : \
289	(N < 5) ? builtin_type_double : \
290	(N < 8) ? builtin_type_int : \
291	(N < 14) ? builtin_type_double : \
292	builtin_type_int)
293
294	/* Store the address of the place in which to copy the structure the
295	subroutine will return. This is called from call_function.
296	Native cc passes the address in eax, gcc (up to version 2.5.8)
297	passes it on the stack. gcc should be fixed in future versions to
298	adopt native cc conventions. */
299
300	#undef STORE_STRUCT_RETURN
301	#define STORE_STRUCT_RETURN(ADDR, SP) write_register(0, (ADDR))
302
303	/* Extract from an array REGBUF containing the (raw) register state
304	a function return value of type TYPE, and copy that, in virtual format,
305	into VALBUF. */
306
307	#undef EXTRACT_RETURN_VALUE
308	#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
309	symmetry_extract_return_value(TYPE, REGBUF, VALBUF)
310
311	/* The following redefines make backtracing through sigtramp work.
312	They manufacture a fake sigtramp frame and obtain the saved pc in sigtramp
313	from the sigcontext structure which is pushed by the kernel on the
314	user stack, along with a pointer to it. */
315
316	#define IN_SIGTRAMP(pc, name) ((name) && STREQ ("_sigcode", name))
317
318	/* Offset to saved PC in sigcontext, from <signal.h>. */
319	#define SIGCONTEXT_PC_OFFSET 16
320
c5aa993b	321	#endif /* ifndef TM_SYMMETRY_H */