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Diffstat (limited to 'gdb/config/m68k/tm-vx68.h')
-rw-r--r-- | gdb/config/m68k/tm-vx68.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/gdb/config/m68k/tm-vx68.h b/gdb/config/m68k/tm-vx68.h new file mode 100644 index 0000000..8ce67a1 --- /dev/null +++ b/gdb/config/m68k/tm-vx68.h @@ -0,0 +1,78 @@ +/* Target machine description for VxWorks 68k'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., 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 "m68k/tm-68k.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) |