projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 5076de82 FF |
1 | /* Parameters for execution on a Sony/NEWS, for GDB, the GNU debugger. |
| 2 | Copyright 1987, 1989, 1991, 1993 Free Software Foundation, Inc. | |
| 3 | ||
| 4 | This file is part of GDB. | |
| 5 | ||
| 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. | |
| 10 | ||
| 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. | |
| 15 | ||
| 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. */ | |
| 19 | ||
| 20 | /* See following cpu type determination macro to get the machine type. | |
| f46ffb9e | 21 | |
| 5076de82 FF |
22 | Here is an m-news.h file for gdb. It supports the 68881 registers. |
| 23 | by hikichi@srava.sra.junet | |
| f46ffb9e | 24 | |
| 5076de82 FF |
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. */ | |
| 28 | ||
| 5076de82 FF |
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, | |
| 31 | into VALBUF. */ | |
| 32 | ||
| 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) \ | |
| 36 | { \ | |
| 37 | REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, \ | |
| 38 | ®BUF[REGISTER_BYTE (FP0_REGNUM)], VALBUF); \ | |
| 39 | } \ | |
| 40 | else \ | |
| ade40d31 | 41 | memcpy (VALBUF, REGBUF, TYPE_LENGTH (TYPE)); } |
| 5076de82 FF |
42 | |
| 43 | /* Write into appropriate registers a function return value | |
| 44 | of type TYPE, given in virtual format. */ | |
| 45 | ||
| 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) \ | |
| 49 | { \ | |
| 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)); \ | |
| 54 | } \ | |
| 55 | else \ | |
| 56 | write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)); } | |
| 57 | ||
| 58 | /* Return number of args passed to a frame. | |
| 59 | Can return -1, meaning no way to tell. */ | |
| 60 | ||
| 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); \ | |
| 64 | val = 0; \ | |
| 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); \ | |
| 72 | val >>= 2; } | |
| 73 | ||
| 2225eb85 | 74 | #include "m68k/tm-m68k.h" |