| /* Parameters for execution on a WDC 65816 machine. |
| Copyright (C) 1995 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. */ |
| |
| /* Contributed by Steve Chamberlain sac@cygnus.com */ |
| |
| #define GDB_TARGET_IS_W65 |
| |
| #define IEEE_FLOAT (1) |
| |
| /* Define the bit, byte, and word ordering of the machine. */ |
| |
| #define TARGET_BYTE_ORDER LITTLE_ENDIAN |
| |
| |
| /* Offset from address of function to start of its code. |
| Zero on most machines. */ |
| |
| #define FUNCTION_START_OFFSET 0 |
| |
| /* Advance PC across any function entry prologue instructions |
| to reach some "real" code. */ |
| |
| extern CORE_ADDR w65_skip_prologue (); |
| |
| #define SKIP_PROLOGUE(ip) \ |
| {(ip) = w65_skip_prologue(ip);} |
| |
| |
| /* Immediately after a function call, return the saved pc. |
| Can't always go through the frames for this because on some machines |
| the new frame is not set up until the new function executes |
| some instructions. |
| |
| The return address is the value saved in the PR register + 4 */ |
| |
| #define SAVED_PC_AFTER_CALL(frame) \ |
| saved_pc_after_call(frame) |
| |
| |
| /* Stack grows downward. */ |
| |
| #define INNER_THAN(lhs,rhs) ((lhs) < (rhs)) |
| |
| /* Illegal instruction - used by the simulator for breakpoint |
| detection */ |
| |
| #define BREAKPOINT {0xcb} /* WAI */ |
| |
| /* If your kernel resets the pc after the trap happens you may need to |
| define this before including this file. */ |
| #define DECR_PC_AFTER_BREAK 0 |
| |
| /* Return 1 if P points to an invalid floating point value. */ |
| |
| #define INVALID_FLOAT(p, len) 0 /* Just a first guess; not checked */ |
| |
| /* Say how long registers are. */ |
| /*#define REGISTER_TYPE int */ |
| |
| /* Say how much memory is needed to store a copy of the register set */ |
| #define REGISTER_BYTES (NUM_REGS*4) |
| |
| /* Index within `registers' of the first byte of the space for |
| register N. */ |
| |
| #define REGISTER_BYTE(N) ((N)*4) |
| |
| /* Number of bytes of storage in the actual machine representation |
| for register N. */ |
| |
| #define REGISTER_RAW_SIZE(N) (((N) < 16) ? 2 : 4) |
| |
| #define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N) |
| |
| /* Largest value REGISTER_RAW_SIZE can have. */ |
| |
| #define MAX_REGISTER_RAW_SIZE 4 |
| |
| /* Largest value REGISTER_VIRTUAL_SIZE can have. */ |
| |
| #define MAX_REGISTER_VIRTUAL_SIZE 4 |
| |
| /* Return the GDB type object for the "standard" data type |
| of data in register N. */ |
| |
| #define REGISTER_VIRTUAL_TYPE(N) \ |
| (REGISTER_VIRTUAL_SIZE(N) == 2 ? builtin_type_unsigned_short : builtin_type_unsigned_long) |
| |
| /* Initializer for an array of names of registers. |
| Entries beyond the first NUM_REGS are ignored. */ |
| |
| #define REGISTER_NAMES \ |
| {"r0","r1","r2", "r3", "r4", "r5", "r6", "r7", \ |
| "r8","r9","r10","r11","r12","r13","r14","r15", \ |
| "pc","a", "x", "y", "dbr","d", "s", "p", \ |
| "ticks","cycles","insts"} |
| |
| /* Register numbers of various important registers. |
| Note that some of these values are "real" register numbers, |
| and correspond to the general registers of the machine, |
| and some are "phony" register numbers which are too large |
| to be actual register numbers as far as the user is concerned |
| but do serve to get the desired values when passed to read_register. */ |
| |
| #define SP_REGNUM 22 |
| #define FP_REGNUM 15 |
| #define NUM_REGS 27 |
| #define PC_REGNUM 16 |
| #define P_REGNUM 23 |
| |
| /* Store the address of the place in which to copy the structure the |
| subroutine will return. This is called from call_function. |
| |
| We store structs through a pointer passed in R4 */ |
| |
| #define STORE_STRUCT_RETURN(ADDR, SP) \ |
| { write_register (4, (ADDR)); } |
| |
| /* 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. */ |
| |
| #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ |
| memcpy (VALBUF, (char *)(REGBUF), TYPE_LENGTH(TYPE)) |
| |
| |
| /* Write into appropriate registers a function return value |
| of type TYPE, given in virtual format. |
| |
| Things always get returned in R4/R5 */ |
| |
| #define STORE_RETURN_VALUE(TYPE,VALBUF) \ |
| write_register_bytes (REGISTER_BYTE(4), VALBUF, TYPE_LENGTH (TYPE)) |
| |
| |
| /* Extract from an array REGBUF containing the (raw) register state |
| the address in which a function should return its structure value, |
| as a CORE_ADDR (or an expression that can be used as one). */ |
| |
| #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF)) |
| |
| /* A macro that tells us whether the function invocation represented |
| by FI does not have a frame on the stack associated with it. If it |
| does not, FRAMELESS is set to 1, else 0. */ |
| |
| #define FRAMELESS_FUNCTION_INVOCATION(FI) \ |
| (frameless_look_for_prologue (FI)) |
| |
| #define FRAME_CHAIN(FRAME) w65_frame_chain(FRAME) |
| #define FRAME_SAVED_PC(FRAME) (w65_frame_saved_pc(FRAME)) |
| #define FRAME_ARGS_ADDRESS(fi) (fi)->frame |
| #define FRAME_LOCALS_ADDRESS(fi) (fi)->frame |
| |
| /* Set VAL to the number of args passed to frame described by FI. |
| Can set VAL to -1, meaning no way to tell. */ |
| |
| /* We can't tell how many args there are */ |
| |
| #define FRAME_NUM_ARGS(fi) (-1) |
| |
| /* Return number of bytes at start of arglist that are not really args. */ |
| |
| #define FRAME_ARGS_SKIP 0 |
| |
| /* Put here the code to store, into a struct frame_saved_regs, |
| the addresses of the saved registers of frame described by FRAME_INFO. |
| This includes special registers such as pc and fp saved in special |
| ways in the stack frame. sp is even more special: |
| the address we return for it IS the sp for the next frame. */ |
| |
| #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \ |
| frame_find_saved_regs(frame_info, &(frame_saved_regs)) |
| |
| typedef unsigned short INSN_WORD; |
| |
| extern CORE_ADDR w65_addr_bits_remove (CORE_ADDR); |
| #define ADDR_BITS_REMOVE(addr) w65_addr_bits_remove (addr) |
| |
| #define CALL_DUMMY_LENGTH 10 |
| |
| /* Discard from the stack the innermost frame, |
| restoring all saved registers. */ |
| |
| #define POP_FRAME pop_frame(); |
| |
| |
| #define NOP {0xea} |
| |
| #define REGISTER_SIZE 4 |
| |
| #define PRINT_REGISTER_HOOK(regno) print_register_hook(regno) |
| |
| #define TARGET_INT_BIT 16 |
| #define TARGET_LONG_BIT 32 |
| #define TARGET_PTR_BIT 32 |