[deliverable/binutils-gdb.git] / gdb / config / m68k / tm-linux.h

/* Definitions to target GDB to Linux on m680x0
   Copyright 1996, 1998, 1999, 2000 Free Software Foundation, Inc.

   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.  */

#include "regcache.h"

/* Number of traps that happen between exec'ing the shell to run an
   inferior, and when we finally get to the inferior code.  This is 2
   on most implementations.  */

#define START_INFERIOR_TRAPS_EXPECTED 2

/* The following definitions are appropriate when using the ELF
   format, where floating point values are returned in fp0, pointer
   values in a0 and other values in d0.  */

/* 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.  */

#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
{									\
  if (TYPE_CODE (TYPE) == TYPE_CODE_FLT)				\
    {									\
       REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, TYPE,			\
				    ((char *) (REGBUF)			\
				     + REGISTER_BYTE (FP0_REGNUM)),	\
				    VALBUF);				\
    }									\
  else if (TYPE_CODE (TYPE) == TYPE_CODE_PTR)				\
    memcpy (VALBUF, (char *) (REGBUF) + REGISTER_BYTE (A0_REGNUM),	\
	    TYPE_LENGTH (TYPE));					\
  else									\
    memcpy (VALBUF,							\
	    ((char *) (REGBUF)						\
	     + (TYPE_LENGTH (TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH (TYPE))),	\
	    TYPE_LENGTH (TYPE));					\
}

/* Write into appropriate registers a function return value of type
   TYPE, given in virtual format.  */

#define STORE_RETURN_VALUE(TYPE,VALBUF) \
{									\
  if (TYPE_CODE (TYPE) == TYPE_CODE_FLT)				\
    {									\
      char raw_buffer[REGISTER_RAW_SIZE (FP0_REGNUM)];			\
      REGISTER_CONVERT_TO_RAW (TYPE, FP0_REGNUM, VALBUF, raw_buffer);	\
      write_register_bytes (REGISTER_BYTE (FP0_REGNUM),			\
			    raw_buffer, TYPE_LENGTH (TYPE));		\
    }									\
  else									\
    {									\
      if (TYPE_CODE (TYPE) == TYPE_CODE_PTR)				\
	write_register_bytes (REGISTER_BYTE (A0_REGNUM), VALBUF,	\
			      TYPE_LENGTH (TYPE));			\
      write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE));		\
    }									\
}

#include "tm-linux.h"
#include "m68k/tm-m68k.h"

/* Extract from an array REGBUF containing the (raw) register state
   the address in which a function should return its structure value,
   as a CORE_ADDR (or an expression that can be used as one).  */

#undef EXTRACT_STRUCT_VALUE_ADDRESS
#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
  (*(CORE_ADDR *)((char *) (REGBUF) + REGISTER_BYTE (A0_REGNUM)))

/* Offsets (in target ints) into jmp_buf.  */

#define JB_ELEMENT_SIZE 4
#define JB_PC 7

/* Figure out where the longjmp will land.  Slurp the args out of the stack.
   We expect the first arg to be a pointer to the jmp_buf structure from which
   we extract the pc (JB_PC) that we will land at.  The pc is copied into ADDR.
   This routine returns true on success */

#define GET_LONGJMP_TARGET(ADDR) m68k_get_longjmp_target(ADDR)

/* Offset to saved PC in sigcontext, from <asm/sigcontext.h>.  */
#define SIGCONTEXT_PC_OFFSET 26

#undef FRAME_SAVED_PC
#define FRAME_SAVED_PC(FRAME) \
  (((FRAME)->signal_handler_caller \
    ? sigtramp_saved_pc (FRAME) \
    : read_memory_integer ((FRAME)->frame + 4, 4)))

extern CORE_ADDR sigtramp_saved_pc (struct frame_info *);

#define IN_SIGTRAMP(pc,name) in_sigtramp (pc)
extern int in_sigtramp (CORE_ADDR pc);
Commit	Line	Data
c906108c	1	/* Definitions to target GDB to Linux on m680x0
b6ba6518	2	Copyright 1996, 1998, 1999, 2000 Free Software Foundation, Inc.
c906108c	3
c5aa993b	4	This file is part of GDB.
c906108c	5
c5aa993b JM	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2 of the License, or
	9	(at your option) any later version.
c906108c	10
c5aa993b JM	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
c906108c	15
c5aa993b JM	16	You should have received a copy of the GNU General Public License
	17	along with this program; if not, write to the Free Software
	18	Foundation, Inc., 59 Temple Place - Suite 330,
	19	Boston, MA 02111-1307, USA. */
c906108c	20
f88e2c52 AC	21	#include "regcache.h"
f88e2c52 AC	22
c906108c SS	23	/* Number of traps that happen between exec'ing the shell to run an
	24	inferior, and when we finally get to the inferior code. This is 2
	25	on most implementations. */
	26
	27	#define START_INFERIOR_TRAPS_EXPECTED 2
	28
	29	/* The following definitions are appropriate when using the ELF
	30	format, where floating point values are returned in fp0, pointer
	31	values in a0 and other values in d0. */
	32
	33	/* Extract from an array REGBUF containing the (raw) register state a
	34	function return value of type TYPE, and copy that, in virtual
	35	format, into VALBUF. */
	36
	37	#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
	38	{ \
	39	if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
	40	{ \
	41	REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, TYPE, \
	42	((char *) (REGBUF) \
	43	+ REGISTER_BYTE (FP0_REGNUM)), \
	44	VALBUF); \
	45	} \
	46	else if (TYPE_CODE (TYPE) == TYPE_CODE_PTR) \
	47	memcpy (VALBUF, (char *) (REGBUF) + REGISTER_BYTE (A0_REGNUM), \
	48	TYPE_LENGTH (TYPE)); \
	49	else \
	50	memcpy (VALBUF, \
	51	((char *) (REGBUF) \
	52	+ (TYPE_LENGTH (TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH (TYPE))), \
	53	TYPE_LENGTH (TYPE)); \
	54	}
	55
	56	/* Write into appropriate registers a function return value of type
	57	TYPE, given in virtual format. */
	58
	59	#define STORE_RETURN_VALUE(TYPE,VALBUF) \
	60	{ \
	61	if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
	62	{ \
	63	char raw_buffer[REGISTER_RAW_SIZE (FP0_REGNUM)]; \
	64	REGISTER_CONVERT_TO_RAW (TYPE, FP0_REGNUM, VALBUF, raw_buffer); \
	65	write_register_bytes (REGISTER_BYTE (FP0_REGNUM), \
	66	raw_buffer, TYPE_LENGTH (TYPE)); \
	67	} \
	68	else \
	69	{ \
	70	if (TYPE_CODE (TYPE) == TYPE_CODE_PTR) \
	71	write_register_bytes (REGISTER_BYTE (A0_REGNUM), VALBUF, \
	72	TYPE_LENGTH (TYPE)); \
	73	write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)); \
	74	} \
	75	}
	76
c2d11a7d	77	#include "tm-linux.h"
c906108c SS	78	#include "m68k/tm-m68k.h"
	79
	80	/* Extract from an array REGBUF containing the (raw) register state
	81	the address in which a function should return its structure value,
	82	as a CORE_ADDR (or an expression that can be used as one). */
	83
	84	#undef EXTRACT_STRUCT_VALUE_ADDRESS
	85	#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
	86	((CORE_ADDR )((char *) (REGBUF) + REGISTER_BYTE (A0_REGNUM)))
	87
	88	/* Offsets (in target ints) into jmp_buf. */
	89
	90	#define JB_ELEMENT_SIZE 4
	91	#define JB_PC 7
	92
	93	/* Figure out where the longjmp will land. Slurp the args out of the stack.
	94	We expect the first arg to be a pointer to the jmp_buf structure from which
	95	we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR.
	96	This routine returns true on success */
	97
f4281f55	98	#define GET_LONGJMP_TARGET(ADDR) m68k_get_longjmp_target(ADDR)
c906108c SS	99
	100	/* Offset to saved PC in sigcontext, from <asm/sigcontext.h>. */
	101	#define SIGCONTEXT_PC_OFFSET 26
	102
	103	#undef FRAME_SAVED_PC
	104	#define FRAME_SAVED_PC(FRAME) \
	105	(((FRAME)->signal_handler_caller \
	106	? sigtramp_saved_pc (FRAME) \
	107	: read_memory_integer ((FRAME)->frame + 4, 4)))
	108
a14ed312	109	extern CORE_ADDR sigtramp_saved_pc (struct frame_info *);
c906108c SS	110
c906108c SS	111	#define IN_SIGTRAMP(pc,name) in_sigtramp (pc)
a14ed312	112	extern int in_sigtramp (CORE_ADDR pc);