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sfurman |
/* Target machine description for VxWorks m68k's, for GDB, the GNU debugger.
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Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1996, 1998, 1999, 2000
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Free Software Foundation, Inc.
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Contributed by Cygnus Support.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* GCC is probably the only compiler used on this configuration. So
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get this right even if the code which detects gcc2_compiled. is
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still broken. */
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#define BELIEVE_PCC_PROMOTION 1
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/* We have more complex, useful breakpoints on the target. */
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#define DECR_PC_AFTER_BREAK 0
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#include "m68k/tm-m68k.h"
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#include "config/tm-vxworks.h"
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/* Takes the current frame-struct pointer and returns the chain-pointer
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to get to the calling frame.
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If our current frame pointer is zero, we're at the top; else read out
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the saved FP from memory pointed to by the current FP. */
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#undef FRAME_CHAIN
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#define FRAME_CHAIN(thisframe) ((thisframe)->frame? read_memory_integer ((thisframe)->frame, 4): 0)
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/* If the chain pointer is zero (either because the saved value fetched
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by FRAME_CHAIN was zero, or because the current FP was zero so FRAME_CHAIN
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never fetched anything), we are at the top of the stack. */
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/* We are guaranteed to have a zero frame pointer at bottom of stack, too. */
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#undef FRAME_CHAIN_VALID
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#define FRAME_CHAIN_VALID(chain, thisframe) nonnull_frame_chain_valid (chain, thisframe)
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/* FIXME, Longjmp information stolen from Sun-3 config. Dunno if right. */
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/* Offsets (in target ints) into jmp_buf. Not defined by Sun, but at least
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documented in a comment in <machine/setjmp.h>! */
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#define JB_ELEMENT_SIZE 4
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#define JB_ONSSTACK 0
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#define JB_SIGMASK 1
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#define JB_SP 2
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#define JB_PC 3
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#define JB_PSL 4
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#define JB_D2 5
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#define JB_D3 6
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#define JB_D4 7
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#define JB_D5 8
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#define JB_D6 9
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#define JB_D7 10
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#define JB_A2 11
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#define JB_A3 12
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#define JB_A4 13
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#define JB_A5 14
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#define JB_A6 15
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/* Figure out where the longjmp will land. Slurp the args out of the stack.
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We expect the first arg to be a pointer to the jmp_buf structure from which
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we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR.
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This routine returns true on success */
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#define GET_LONGJMP_TARGET(ADDR) m68k_get_longjmp_target(ADDR)
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/* Number of registers in a ptrace_getregs call. */
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#define VX_NUM_REGS (18)
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/* Number of registers in a ptrace_getfpregs call. */
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#define VX_SIZE_FPREGS (8 * REGISTER_RAW_SIZE (FP0_REGNUM) \
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+ (3 * REGISTER_SIZE))
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