[deliverable/binutils-gdb.git] / gdb / config / m68k / tm-vx68.h

/* Target machine description for VxWorks m68k's, for GDB, the GNU debugger.
   Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1996, 1998, 1999, 2000
   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., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/* GCC is probably the only compiler used on this configuration.  So
   get this right even if the code which detects gcc2_compiled. is
   still broken.  */

#define BELIEVE_PCC_PROMOTION 1

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

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

/* 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.  */

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

#undef	FRAME_CHAIN_VALID
#define FRAME_CHAIN_VALID(chain, thisframe) nonnull_frame_chain_valid (chain, thisframe)

/* 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) m68k_get_longjmp_target(ADDR)

/* Number of registers in a ptrace_getregs call. */

#define VX_NUM_REGS (18)

/* Number of registers in a ptrace_getfpregs call. */

#define VX_SIZE_FPREGS (8 * REGISTER_RAW_SIZE (FP0_REGNUM) \
			+ (3 * REGISTER_SIZE))
Commit	Line	Data
c906108c	1	/* Target machine description for VxWorks m68k's, for GDB, the GNU debugger.
b6ba6518 KB	2	Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1996, 1998, 1999, 2000
b6ba6518 KB	3	Free Software Foundation, Inc.
c906108c SS	4	Contributed by Cygnus Support.
c906108c SS	5
c5aa993b	6	This file is part of GDB.
c906108c	7
c5aa993b JM	8	This program is free software; you can redistribute it and/or modify
	9	it under the terms of the GNU General Public License as published by
	10	the Free Software Foundation; either version 2 of the License, or
	11	(at your option) any later version.
c906108c	12
c5aa993b JM	13	This program is distributed in the hope that it will be useful,
	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
c906108c	17
c5aa993b JM	18	You should have received a copy of the GNU General Public License
	19	along with this program; if not, write to the Free Software
	20	Foundation, Inc., 59 Temple Place - Suite 330,
	21	Boston, MA 02111-1307, USA. */
c906108c	22
c906108c SS	23	/* GCC is probably the only compiler used on this configuration. So
	24	get this right even if the code which detects gcc2_compiled. is
	25	still broken. */
	26
	27	#define BELIEVE_PCC_PROMOTION 1
	28
	29	/* We have more complex, useful breakpoints on the target. */
	30	#define DECR_PC_AFTER_BREAK 0
	31
	32	#include "m68k/tm-m68k.h"
cce74817	33	#include "tm-vxworks.h"
c906108c SS	34
	35	/* Takes the current frame-struct pointer and returns the chain-pointer
	36	to get to the calling frame.
	37
	38	If our current frame pointer is zero, we're at the top; else read out
	39	the saved FP from memory pointed to by the current FP. */
	40
	41	#undef FRAME_CHAIN
	42	#define FRAME_CHAIN(thisframe) ((thisframe)->frame? read_memory_integer ((thisframe)->frame, 4): 0)
	43
	44	/* If the chain pointer is zero (either because the saved value fetched
	45	by FRAME_CHAIN was zero, or because the current FP was zero so FRAME_CHAIN
	46	never fetched anything), we are at the top of the stack. */
	47	/* We are guaranteed to have a zero frame pointer at bottom of stack, too. */
	48
	49	#undef FRAME_CHAIN_VALID
	50	#define FRAME_CHAIN_VALID(chain, thisframe) nonnull_frame_chain_valid (chain, thisframe)
	51
	52	/* FIXME, Longjmp information stolen from Sun-3 config. Dunno if right. */
	53	/* Offsets (in target ints) into jmp_buf. Not defined by Sun, but at least
	54	documented in a comment in <machine/setjmp.h>! */
	55
	56	#define JB_ELEMENT_SIZE 4
	57
	58	#define JB_ONSSTACK 0
	59	#define JB_SIGMASK 1
	60	#define JB_SP 2
	61	#define JB_PC 3
	62	#define JB_PSL 4
	63	#define JB_D2 5
	64	#define JB_D3 6
	65	#define JB_D4 7
	66	#define JB_D5 8
	67	#define JB_D6 9
	68	#define JB_D7 10
	69	#define JB_A2 11
	70	#define JB_A3 12
	71	#define JB_A4 13
	72	#define JB_A5 14
	73	#define JB_A6 15
	74
	75	/* Figure out where the longjmp will land. Slurp the args out of the stack.
	76	We expect the first arg to be a pointer to the jmp_buf structure from which
	77	we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR.
	78	This routine returns true on success */
	79
f4281f55	80	#define GET_LONGJMP_TARGET(ADDR) m68k_get_longjmp_target(ADDR)
c906108c SS	81
	82	/* Number of registers in a ptrace_getregs call. */
	83
	84	#define VX_NUM_REGS (18)
	85
	86	/* Number of registers in a ptrace_getfpregs call. */
	87
	88	#define VX_SIZE_FPREGS (8 * REGISTER_RAW_SIZE (FP0_REGNUM) \
	89	+ (3 * REGISTER_SIZE))