--- /dev/null
+/* 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., 675 Mass Ave, Cambridge, MA 02139, 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 <
+
+/* 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
+
+/* Nonzero if instruction at PC is a return instruction. */
+
+#define ABOUT_TO_RETURN(pc) \
+ (read_memory_integer(pc,1) == RTL || read_memory_integer(pc,1) == RTS)
+
+#define RTL 0x6b
+#define RTS 0x60
+
+/* 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) \
+ (FRAMELESS) = 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(val,fi) (val = -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))
+
+#define NAMES_HAVE_UNDERSCORE
+
+typedef unsigned short INSN_WORD;
+
+#define ADDR_BITS_REMOVE(addr) ((addr) & 0xffffff)
+
+#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
projects / binutils-gdb.git / commitdiff