1 /* Parameters for execution on a Sony/NEWS, for GDB, the GNU debugger.
2 Copyright 1987, 1989, 1991, 1993 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /* See following cpu type determination macro to get the machine type.
22 Here is an m-news.h file for gdb. It supports the 68881 registers.
23 by hikichi@srava.sra.junet
25 * Ptrace for handling floating register has a bug(before NEWS OS version 2.2),
26 * After NEWS OS version 3.2, some of ptrace's bug is fixed.
27 But we cannot change the floating register(see adb(1) in OS 3.2) yet. */
29 /* Extract from an array REGBUF containing the (raw) register state
30 a function return value of type TYPE, and copy that, in virtual format,
33 /* when it return the floating value, use the FP0 in NEWS. */
34 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
35 { if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
37 REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, \
38 ®BUF[REGISTER_BYTE (FP0_REGNUM)], VALBUF); \
41 memcpy (VALBUF, REGBUF, TYPE_LENGTH (TYPE)); }
43 /* Write into appropriate registers a function return value
44 of type TYPE, given in virtual format. */
46 /* when it return the floating value, use the FP0 in NEWS. */
47 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
48 { if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
50 char raw_buf[REGISTER_RAW_SIZE (FP0_REGNUM)]; \
51 REGISTER_CONVERT_TO_RAW (FP0_REGNUM, VALBUF, raw_buf); \
52 write_register_bytes (FP0_REGNUM, \
53 raw_buf, REGISTER_RAW_SIZE (FP0_REGNUM)); \
56 write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)); }
58 /* Return number of args passed to a frame.
59 Can return -1, meaning no way to tell. */
61 #define FRAME_NUM_ARGS(val, fi) \
62 { register CORE_ADDR pc = FRAME_SAVED_PC (fi); \
63 register int insn = 0177777 & read_memory_integer (pc, 2); \
65 if (insn == 0047757 || insn == 0157374) /* lea W(sp),sp or addaw #W,sp */ \
66 val = read_memory_integer (pc + 2, 2); \
67 else if ((insn & 0170777) == 0050217 /* addql #N, sp */ \
68 || (insn & 0170777) == 0050117) /* addqw */ \
69 { val = (insn >> 9) & 7; if (val == 0) val = 8; } \
70 else if (insn == 0157774) /* addal #WW, sp */ \
71 val = read_memory_integer (pc + 2, 4); \
74 #include "m68k/tm-m68k.h"
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