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Diffstat (limited to 'gdb/config/m68k/tm-news.h')
| -rw-r--r-- | gdb/config/m68k/tm-news.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/gdb/config/m68k/tm-news.h b/gdb/config/m68k/tm-news.h new file mode 100644 index 00000000000..9fca4467659 --- /dev/null +++ b/gdb/config/m68k/tm-news.h @@ -0,0 +1,75 @@ +/* Parameters for execution on a Sony/NEWS, for GDB, the GNU debugger. + Copyright 1987, 1989, 1991, 1993 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 + +* 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. */ + +/* 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, TYPE, \ + ®BUF[REGISTER_BYTE (FP0_REGNUM)], \ + VALBUF); \ + } \ + else \ + memcpy (VALBUF, REGBUF, 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 (TYPE, FP0_REGNUM, VALBUF, raw_buf); \ + write_register_bytes (REGISTER_BYTE (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 "m68k/tm-m68k.h" |