From be21628de5bcd9406fbd4c7d5b7dea8427c8d286 Mon Sep 17 00:00:00 2001 From: Steve Chamberlain Date: Mon, 16 Jan 1995 01:29:48 +0000 Subject: * w65-tdep.c, config/tm-w65.h, config/w65.mt: New files. * configure.in: Suppprt for w65, --- gdb/config/w65/tm-w65.h | 220 ++++++++++++++++++++++++++++++++++++++++++++++++ gdb/config/w65/w65.mt | 11 +++ 2 files changed, 231 insertions(+) create mode 100644 gdb/config/w65/tm-w65.h create mode 100755 gdb/config/w65/w65.mt (limited to 'gdb/config/w65') diff --git a/gdb/config/w65/tm-w65.h b/gdb/config/w65/tm-w65.h new file mode 100644 index 0000000..10a30a4 --- /dev/null +++ b/gdb/config/w65/tm-w65.h @@ -0,0 +1,220 @@ +/* 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 diff --git a/gdb/config/w65/w65.mt b/gdb/config/w65/w65.mt new file mode 100755 index 0000000..0d61dcc --- /dev/null +++ b/gdb/config/w65/w65.mt @@ -0,0 +1,11 @@ +# Target: WDC 65816 simulator +TDEPFILES= w65-tdep.o remote-sim.o libsim.a + +other:all + +libsim.a: + cp ../sim/w65/libsim.a . + ranlib libsim.a + + +TM_FILE= tm-w65.h -- cgit v1.1