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+/* Parameters for execution on a Sony/NEWS, for GDB, the GNU debugger.
+ Copyright (C) 1987, 1989 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+GDB 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 1, or (at your option)
+any later version.
+
+GDB 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 GDB; see the file COPYING. If not, write to
+the Free Software Foundation, 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 this if the C compiler puts an underscore at the front
+ of external names before giving them to the linker. */
+
+#define NAMES_HAVE_UNDERSCORE
+
+/* Symbols on this machine are in DBX format. */
+#define READ_DBX_FORMAT
+
+/* 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, \
+ &REGBUF[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; }
+
+/* Things needed for making the inferior call functions. */
+#define PUSH_DUMMY_FRAME \
+{ register CORE_ADDR sp = read_register (SP_REGNUM); \
+ register int regnum; \
+ char raw_buffer[12]; \
+ sp = push_word (sp, read_register (PC_REGNUM)); \
+ sp = push_word (sp, read_register (FP_REGNUM)); \
+ write_register (FP_REGNUM, sp); \
+ for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--) \
+ { read_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12); \
+ sp = push_bytes (sp, raw_buffer, 12); } \
+ for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) \
+ sp = push_word (sp, read_register (regnum)); \
+ sp = push_word (sp, read_register (PS_REGNUM)); \
+ write_register (SP_REGNUM, sp); }
+
+/* Discard from the stack the innermost frame, restoring all registers. */
+
+#define POP_FRAME \
+{ register FRAME frame = get_current_frame (); \
+ register CORE_ADDR fp; \
+ register int regnum; \
+ struct frame_saved_regs fsr; \
+ struct frame_info *fi; \
+ char raw_buffer[12]; \
+ fi = get_frame_info (frame); \
+ fp = fi->frame; \
+ get_frame_saved_regs (fi, &fsr); \
+ for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--) \
+ if (fsr.regs[regnum]) \
+ { read_memory (fsr.regs[regnum], raw_buffer, 12); \
+ write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12); }\
+ for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) \
+ if (fsr.regs[regnum]) \
+ write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \
+ if (fsr.regs[PS_REGNUM]) \
+ write_register (PS_REGNUM, read_memory_integer (fsr.regs[PS_REGNUM], 4)); \
+ write_register (FP_REGNUM, read_memory_integer (fp, 4)); \
+ write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); \
+ write_register (SP_REGNUM, fp + 8); \
+ flush_cached_frames (); \
+ set_current_frame (create_new_frame (read_register (FP_REGNUM), \
+ read_pc ())); }
+
+/* This sequence of words is the instructions
+ fmove.m #<f0-f7>,-(sp)
+ movem.l 0xfffc,-(sp) ;; no save a6(fp) and a7(sp)
+ clr.w -(sp)
+ move.w ccr,-(sp)
+ /..* The arguments are pushed at this point by GDB;
+ no code is needed in the dummy for this.
+ The CALL_DUMMY_START_OFFSET gives the position of
+ the following jsr instruction. *../
+ jbsr (#32323232)
+ add.l #69696969,sp
+ bpt
+ nop
+Note this is 24 bytes.
+We actually start executing at the jsr, since the pushing of the
+registers is done by PUSH_DUMMY_FRAME. If this were real code,
+the arguments for the function called by the jsr would be pushed
+between the moveml and the jsr, and we could allow it to execute through.
+But the arguments have to be pushed by GDB after the PUSH_DUMMY_FRAME is done,
+and we cannot allow the moveml to push the registers again lest they be
+taken for the arguments. */
+
+#define CALL_DUMMY {0xf227e0ff, 0x48e7fffc, 0x426742e7, 0x4eb93232, 0x3232dffc, 0x69696969, 0x4e4f4e71}
+
+#define CALL_DUMMY_LENGTH 28
+
+#define CALL_DUMMY_START_OFFSET 12
+
+/* Insert the specified number of args and function address
+ into a call sequence of the above form stored at DUMMYNAME. */
+
+#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
+{ *(int *)((char *) dummyname + 20) = nargs * 4; \
+ *(int *)((char *) dummyname + 14) = fun; }
+
+#define HAVE_68881
+
+#include "tm-68k.h"