[deliverable/binutils-gdb.git] / gdb / tm-vx68.h

/* Target machine description for VxWorks 68k's, for GDB, the GNU debugger.
   Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
   Contributed by Cygnus Support.

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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#define	GDBINIT_FILENAME	".vxgdbinit"

#define	DEFAULT_PROMPT		"(vxgdb) "

#define HAVE_68881

/* We have more complex, useful breakpoints on the target.  */
#define	DECR_PC_AFTER_BREAK	0

#include "tm-68k.h"

/* Define this if the C compiler puts an underscore at the front
   of external names before giving them to the linker.  */

#define NAMES_HAVE_UNDERSCORE

/* We are guaranteed to have a zero frame pointer at bottom of stack, too. */
#undef	FRAME_CHAIN
#undef	FRAME_CHAIN_VALID

/* Takes the current frame-struct pointer and returns the chain-pointer
   to get to the calling frame.

   If our current frame pointer is zero, we're at the top; else read out
   the saved FP from memory pointed to by the current FP.  */

#define FRAME_CHAIN(thisframe) ((thisframe)->frame? read_memory_integer ((thisframe)->frame, 4): 0)

/* If the chain pointer is zero (either because the saved value fetched
   by FRAME_CHAIN was zero, or because the current FP was zero so FRAME_CHAIN
   never fetched anything), we are at the top of the stack.  */

#define FRAME_CHAIN_VALID(chain, thisframe) (chain != 0)

/* FIXME, Longjmp information stolen from Sun-3 config.  Dunno if right.  */
/* Offsets (in target ints) into jmp_buf.  Not defined by Sun, but at least
   documented in a comment in <machine/setjmp.h>! */

#define JB_ELEMENT_SIZE 4

#define JB_ONSSTACK 0
#define JB_SIGMASK 1
#define JB_SP 2
#define JB_PC 3
#define JB_PSL 4
#define JB_D2 5
#define JB_D3 6
#define JB_D4 7
#define JB_D5 8
#define JB_D6 9
#define JB_D7 10
#define JB_A2 11
#define JB_A3 12
#define JB_A4 13
#define JB_A5 14
#define JB_A6 15

/* 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) get_longjmp_target(ADDR)
Commit	Line	Data
ebb3a1e5 JG	1	/* Target machine description for VxWorks 68k's, for GDB, the GNU debugger.
ebb3a1e5 JG	2	Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
07d021a6 JG	3	Contributed by Cygnus Support.
	4
	5	This file is part of GDB.
	6
99a7de40	7	This program is free software; you can redistribute it and/or modify
07d021a6	8	it under the terms of the GNU General Public License as published by
99a7de40 JG	9	the Free Software Foundation; either version 2 of the License, or
99a7de40 JG	10	(at your option) any later version.
07d021a6	11
99a7de40	12	This program is distributed in the hope that it will be useful,
07d021a6 JG	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
99a7de40 JG	18	along with this program; if not, write to the Free Software
99a7de40 JG	19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
07d021a6 JG	20
	21	#define GDBINIT_FILENAME ".vxgdbinit"
	22
	23	#define DEFAULT_PROMPT "(vxgdb) "
	24
6131a42a JG	25	#define HAVE_68881
	26
	27	/* We have more complex, useful breakpoints on the target. */
	28	#define DECR_PC_AFTER_BREAK 0
	29
	30	#include "tm-68k.h"
07d021a6	31
ebb3a1e5 JG	32	/* Define this if the C compiler puts an underscore at the front
	33	of external names before giving them to the linker. */
	34
	35	#define NAMES_HAVE_UNDERSCORE
	36
07d021a6 JG	37	/* We are guaranteed to have a zero frame pointer at bottom of stack, too. */
	38	#undef FRAME_CHAIN
	39	#undef FRAME_CHAIN_VALID
	40
	41	/* Takes the current frame-struct pointer and returns the chain-pointer
	42	to get to the calling frame.
	43
	44	If our current frame pointer is zero, we're at the top; else read out
	45	the saved FP from memory pointed to by the current FP. */
	46
	47	#define FRAME_CHAIN(thisframe) ((thisframe)->frame? read_memory_integer ((thisframe)->frame, 4): 0)
	48
	49	/* If the chain pointer is zero (either because the saved value fetched
	50	by FRAME_CHAIN was zero, or because the current FP was zero so FRAME_CHAIN
	51	never fetched anything), we are at the top of the stack. */
	52
	53	#define FRAME_CHAIN_VALID(chain, thisframe) (chain != 0)
6131a42a JG	54
	55	/* FIXME, Longjmp information stolen from Sun-3 config. Dunno if right. */
	56	/* Offsets (in target ints) into jmp_buf. Not defined by Sun, but at least
	57	documented in a comment in <machine/setjmp.h>! */
	58
	59	#define JB_ELEMENT_SIZE 4
	60
	61	#define JB_ONSSTACK 0
	62	#define JB_SIGMASK 1
	63	#define JB_SP 2
	64	#define JB_PC 3
	65	#define JB_PSL 4
	66	#define JB_D2 5
	67	#define JB_D3 6
	68	#define JB_D4 7
	69	#define JB_D5 8
	70	#define JB_D6 9
	71	#define JB_D7 10
	72	#define JB_A2 11
	73	#define JB_A3 12
	74	#define JB_A4 13
	75	#define JB_A5 14
	76	#define JB_A6 15
	77
	78	/* Figure out where the longjmp will land. Slurp the args out of the stack.
	79	We expect the first arg to be a pointer to the jmp_buf structure from which
	80	we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR.
	81	This routine returns true on success */
	82
	83	#define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)