| 1 | /* Target definitions for delta68. |
| 2 | Copyright 1993, 1994, 1998, 1999, 2000 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., 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #include "regcache.h" |
| 22 | |
| 23 | /* Define BPT_VECTOR if it is different than the default. |
| 24 | This is the vector number used by traps to indicate a breakpoint. */ |
| 25 | |
| 26 | #define BPT_VECTOR 0x1 |
| 27 | |
| 28 | #define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled%" |
| 29 | #define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled%" |
| 30 | |
| 31 | /* Amount PC must be decremented by after a breakpoint. |
| 32 | On the Delta, the kernel decrements it for us. */ |
| 33 | |
| 34 | #define DECR_PC_AFTER_BREAK 0 |
| 35 | |
| 36 | /* Not sure what happens if we try to store this register, but |
| 37 | phdm@info.ucl.ac.be says we need this define. */ |
| 38 | |
| 39 | #define CANNOT_STORE_REGISTER(regno) (regno == FPI_REGNUM) |
| 40 | |
| 41 | /* Extract from an array REGBUF containing the (raw) register state |
| 42 | a function return value of type TYPE, and copy that, in virtual format, |
| 43 | into VALBUF. */ |
| 44 | |
| 45 | /* When it returns a float/double value, use fp0 in sysV68. */ |
| 46 | /* When it returns a pointer value, use a0 in sysV68. */ |
| 47 | |
| 48 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ |
| 49 | if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \ |
| 50 | REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, TYPE, \ |
| 51 | ®BUF[REGISTER_BYTE (FP0_REGNUM)], \ |
| 52 | VALBUF); \ |
| 53 | else \ |
| 54 | memcpy ((VALBUF), \ |
| 55 | (char *) ((REGBUF) + \ |
| 56 | (TYPE_CODE(TYPE) == TYPE_CODE_PTR ? 8 * 4 : \ |
| 57 | (TYPE_LENGTH(TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH(TYPE)))), \ |
| 58 | TYPE_LENGTH(TYPE)) |
| 59 | |
| 60 | /* Write into appropriate registers a function return value |
| 61 | of type TYPE, given in virtual format. */ |
| 62 | |
| 63 | /* When it returns a float/double value, use fp0 in sysV68. */ |
| 64 | /* When it returns a pointer value, use a0 in sysV68. */ |
| 65 | |
| 66 | #define STORE_RETURN_VALUE(TYPE,VALBUF) \ |
| 67 | if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \ |
| 68 | { \ |
| 69 | char raw_buf[REGISTER_RAW_SIZE (FP0_REGNUM)]; \ |
| 70 | REGISTER_CONVERT_TO_RAW (TYPE, FP0_REGNUM, VALBUF, raw_buf); \ |
| 71 | write_register_bytes (REGISTER_BYTE (FP0_REGNUM), \ |
| 72 | raw_buf, REGISTER_RAW_SIZE (FP0_REGNUM)); \ |
| 73 | } \ |
| 74 | else \ |
| 75 | write_register_bytes ((TYPE_CODE(TYPE) == TYPE_CODE_PTR ? 8 * 4 : 0), \ |
| 76 | VALBUF, TYPE_LENGTH (TYPE)) |
| 77 | |
| 78 | /* Return number of args passed to a frame. |
| 79 | Can return -1, meaning no way to tell. */ |
| 80 | |
| 81 | extern int delta68_frame_num_args (struct frame_info *fi); |
| 82 | #define FRAME_NUM_ARGS(fi) (delta68_frame_num_args ((fi))) |
| 83 | |
| 84 | /* On M68040 versions of sysV68 R3V7.1, ptrace(PT_WRITE_I) does not clear |
| 85 | the processor's instruction cache as it should. */ |
| 86 | #define CLEAR_INSN_CACHE() clear_insn_cache() |
| 87 | |
| 88 | #include "m68k/tm-m68k.h" |
| 89 | |
| 90 | /* Extract from an array REGBUF containing the (raw) register state |
| 91 | the address in which a function should return its structure value, |
| 92 | as a CORE_ADDR (or an expression that can be used as one). */ |
| 93 | |
| 94 | #undef EXTRACT_STRUCT_VALUE_ADDRESS |
| 95 | #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF)\ |
| 96 | (*(CORE_ADDR *)((char*)(REGBUF) + 8 * 4)) |
| 97 | |
| 98 | extern int delta68_in_sigtramp (CORE_ADDR pc, char *name); |
| 99 | #define IN_SIGTRAMP(pc,name) delta68_in_sigtramp (pc, name) |
| 100 | |
| 101 | extern CORE_ADDR delta68_frame_saved_pc (struct frame_info *fi); |
| 102 | #undef FRAME_SAVED_PC |
| 103 | #define FRAME_SAVED_PC(fi) delta68_frame_saved_pc (fi) |
| 104 | |
| 105 | extern CORE_ADDR delta68_frame_args_address (struct frame_info *fi); |
| 106 | #undef FRAME_ARGS_ADDRESS |
| 107 | #define FRAME_ARGS_ADDRESS(fi) delta68_frame_args_address (fi) |