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- /* Parameters for execution on a Sony/NEWS, for GDB, the GNU debugger.
- Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
-
- 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. */
-
- /* See following cpu type determination macro to get the machine type.
-
- Here is an m-news.h file for gdb. It supports the 68881 registers.
- by hikichi@srava.sra.junet
-
- * Support Sun assembly format instead of Motorola one.
- * Ptrace for handling floating register has a bug(before NEWS OS version 2.2),
- * After NEWS OS version 3.2, some of ptrace's bug is fixed.
- But we cannot change the floating register(see adb(1) in OS 3.2) yet. */
-
- #define HAVE_68881
-
- /* 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
-
- /* Use to compute STACK_END_ADDR. */
- #define TARGET_UPAGES 2
- #define TARGET_NBPG 4096
-
- /* Address of end of stack space. */
-
- #define STACK_END_ADDR (0x80000000 - TARGET_UPAGES * TARGET_NBPG)
-
- /* Extract from an array REGBUF containing the (raw) register state
- a function return value of type TYPE, and copy that, in virtual format,
- into VALBUF. */
-
- /* when it return the floating value, use the FP0 in NEWS. */
- #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
- { if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
- { \
- REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, \
- ®BUF[REGISTER_BYTE (FP0_REGNUM)], VALBUF); \
- } \
- else \
- bcopy (REGBUF, VALBUF, TYPE_LENGTH (TYPE)); }
-
- /* Write into appropriate registers a function return value
- of type TYPE, given in virtual format. */
-
- /* when it return the floating value, use the FP0 in NEWS. */
- #define STORE_RETURN_VALUE(TYPE,VALBUF) \
- { if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
- { \
- char raw_buf[REGISTER_RAW_SIZE (FP0_REGNUM)]; \
- REGISTER_CONVERT_TO_RAW (FP0_REGNUM, VALBUF, raw_buf); \
- write_register_bytes (FP0_REGNUM, \
- raw_buf, REGISTER_RAW_SIZE (FP0_REGNUM)); \
- } \
- else \
- write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)); }
-
- /* Return number of args passed to a frame.
- Can return -1, meaning no way to tell. */
-
- #define FRAME_NUM_ARGS(val, fi) \
- { register CORE_ADDR pc = FRAME_SAVED_PC (fi); \
- register int insn = 0177777 & read_memory_integer (pc, 2); \
- val = 0; \
- if (insn == 0047757 || insn == 0157374) /* lea W(sp),sp or addaw #W,sp */ \
- val = read_memory_integer (pc + 2, 2); \
- else if ((insn & 0170777) == 0050217 /* addql #N, sp */ \
- || (insn & 0170777) == 0050117) /* addqw */ \
- { val = (insn >> 9) & 7; if (val == 0) val = 8; } \
- else if (insn == 0157774) /* addal #WW, sp */ \
- val = read_memory_integer (pc + 2, 4); \
- val >>= 2; }
-
- #include "tm-68k.h"
-