[thirdparty/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 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.  */

#define	GDBINIT_FILENAME	".vxgdbinit"

#define	DEFAULT_PROMPT		"(vxgdb) "

/* 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"

/* 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)

/* 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
2225eb85	1	/* Target machine description for VxWorks m68k's, for GDB, the GNU debugger.
5076de82 FF	2	Copyright 1986, 1987, 1989, 1991, 1992, 1993 Free Software Foundation, Inc.
	3	Contributed by Cygnus Support.
	4
	5	This file is part of GDB.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	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
	18	along with this program; if not, write to the Free Software
6c9638b4	19	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
5076de82 FF	20
	21	#define GDBINIT_FILENAME ".vxgdbinit"
	22
	23	#define DEFAULT_PROMPT "(vxgdb) "
	24
56756a5a JK	25	/* GCC is probably the only compiler used on this configuration. So
	26	get this right even if the code which detects gcc2_compiled. is
	27	still broken. */
	28
	29	#define BELIEVE_PCC_PROMOTION 1
	30
5076de82 FF	31	/* We have more complex, useful breakpoints on the target. */
	32	#define DECR_PC_AFTER_BREAK 0
	33
2225eb85	34	#include "m68k/tm-m68k.h"
5076de82 FF	35
	36	/* We are guaranteed to have a zero frame pointer at bottom of stack, too. */
	37	#undef FRAME_CHAIN
	38	#undef FRAME_CHAIN_VALID
	39
	40	/* Takes the current frame-struct pointer and returns the chain-pointer
	41	to get to the calling frame.
	42
	43	If our current frame pointer is zero, we're at the top; else read out
	44	the saved FP from memory pointed to by the current FP. */
	45
	46	#define FRAME_CHAIN(thisframe) ((thisframe)->frame? read_memory_integer ((thisframe)->frame, 4): 0)
	47
	48	/* If the chain pointer is zero (either because the saved value fetched
	49	by FRAME_CHAIN was zero, or because the current FP was zero so FRAME_CHAIN
	50	never fetched anything), we are at the top of the stack. */
	51
	52	#define FRAME_CHAIN_VALID(chain, thisframe) (chain != 0)
	53
	54	/* FIXME, Longjmp information stolen from Sun-3 config. Dunno if right. */
	55	/* Offsets (in target ints) into jmp_buf. Not defined by Sun, but at least
	56	documented in a comment in <machine/setjmp.h>! */
	57
	58	#define JB_ELEMENT_SIZE 4
	59
	60	#define JB_ONSSTACK 0
	61	#define JB_SIGMASK 1
	62	#define JB_SP 2
	63	#define JB_PC 3
	64	#define JB_PSL 4
	65	#define JB_D2 5
	66	#define JB_D3 6
	67	#define JB_D4 7
	68	#define JB_D5 8
	69	#define JB_D6 9
	70	#define JB_D7 10
	71	#define JB_A2 11
	72	#define JB_A3 12
	73	#define JB_A4 13
	74	#define JB_A5 14
	75	#define JB_A6 15
	76
	77	/* Figure out where the longjmp will land. Slurp the args out of the stack.
	78	We expect the first arg to be a pointer to the jmp_buf structure from which
	79	we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR.
	80	This routine returns true on success */
	81
	82	#define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)
35799202 RP	83
	84	/* Number of registers in a ptrace_getregs call. */
	85
	86	#define VX_NUM_REGS (18)
	87
	88	/* Number of registers in a ptrace_getfpregs call. */
	89
	90	#define VX_SIZE_FPREGS (8 * REGISTER_RAW_SIZE (FP0_REGNUM) \
f4f0d174	91	+ (3 * REGISTER_SIZE))