1 /* Parameters for execution on a H8/500 series machine.
2 Copyright (C) 1993, 1995 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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. */
21 /* Contributed by Steve Chamberlain sac@cygnus.com */
23 #define GDB_TARGET_IS_H8500
25 #define IEEE_FLOAT (1)
27 /* Define the bit, byte, and word ordering of the machine. */
29 #define TARGET_BYTE_ORDER BIG_ENDIAN
31 /* Define the sizes of integers and pointers. */
33 #define TARGET_INT_BIT 16
35 #define TARGET_LONG_BIT 32
37 #define TARGET_PTR_BIT (minimum_mode ? 16 : 32)
39 /* Offset from address of function to start of its code.
40 Zero on most machines. */
42 #define FUNCTION_START_OFFSET 0
44 /* Advance PC across any function entry prologue instructions
45 to reach some "real" code. */
47 #define SKIP_PROLOGUE(ip) (h8500_skip_prologue (ip))
48 extern CORE_ADDR
h8500_skip_prologue (CORE_ADDR
);
50 /* Immediately after a function call, return the saved pc.
51 Can't always go through the frames for this because on some machines
52 the new frame is not set up until the new function executes
55 #define SAVED_PC_AFTER_CALL(frame) saved_pc_after_call()
56 extern CORE_ADDR
saved_pc_after_call (void);
58 /* Stack grows downward. */
60 #define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
62 /* Illegal instruction - used by the simulator for breakpoint
65 #define BREAKPOINT {0x0b}
67 /* If your kernel resets the pc after the trap happens you may need to
68 define this before including this file. */
70 #define DECR_PC_AFTER_BREAK 0
72 /* Say how long registers are. */
74 #define REGISTER_TYPE unsigned long
76 /* Say how much memory is needed to store a copy of the register set */
78 #define REGISTER_BYTES (NUM_REGS * 4)
80 /* Index within `registers' of the first byte of the space for
83 #define REGISTER_BYTE(N) ((N)*4)
85 /* Number of bytes of storage in the actual machine representation
88 #define REGISTER_RAW_SIZE(N) h8500_register_size(N)
89 extern int h8500_register_size (int regno
);
91 #define REGISTER_SIZE 4
93 #define REGISTER_VIRTUAL_SIZE(N) h8500_register_size(N)
95 /* Largest value REGISTER_RAW_SIZE can have. */
97 #define MAX_REGISTER_RAW_SIZE 4
99 /* Largest value REGISTER_VIRTUAL_SIZE can have. */
101 #define MAX_REGISTER_VIRTUAL_SIZE 4
103 /* Return the GDB type object for the "standard" data type
104 of data in register N. */
106 #define REGISTER_VIRTUAL_TYPE(N) h8500_register_virtual_type(N)
107 extern struct type
*h8500_register_virtual_type (int regno
);
109 /* Initializer for an array of names of registers.
110 Entries beyond the first NUM_REGS are ignored. */
112 #define REGISTER_NAMES \
113 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
114 "pr0","pr1","pr2","pr3","pr4","pr5","pr6","pr7", \
115 "cp", "dp", "ep", "tp", "sr", "pc"}
117 /* Register numbers of various important registers. Note that some of
118 these values are "real" register numbers, and correspond to the
119 general registers of the machine, and some are "phony" register
120 numbers which are too large to be actual register numbers as far as
121 the user is concerned but do serve to get the desired values when
122 passed to read_register. */
135 #define PR2_REGNUM 10
136 #define PR3_REGNUM 11
137 #define PR4_REGNUM 12
138 #define PR5_REGNUM 13
139 #define PR6_REGNUM 14
140 #define PR7_REGNUM 15
142 #define SEG_C_REGNUM 16 /* Segment registers */
143 #define SEG_D_REGNUM 17
144 #define SEG_E_REGNUM 18
145 #define SEG_T_REGNUM 19
147 #define CCR_REGNUM 20 /* Contains processor status */
148 #define PC_REGNUM 21 /* Contains program counter */
152 #define SP_REGNUM PR7_REGNUM /* Contains address of top of stack */
153 #define FP_REGNUM PR6_REGNUM /* Contains address of executing stack frame */
155 #define PTR_SIZE (minimum_mode ? 2 : 4)
156 #define PTR_MASK (minimum_mode ? 0x0000ffff : 0x00ffffff)
158 /* Store the address of the place in which to copy the structure the
159 subroutine will return. This is called from call_function. */
161 /*#define STORE_STRUCT_RETURN(ADDR, SP) \
162 { write_register (0, (ADDR)); abort(); } */
164 /* Extract from an array REGBUF containing the (raw) register state
165 a function return value of type TYPE, and copy that, in virtual format,
168 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
169 memcpy (VALBUF, (char *)(REGBUF), TYPE_LENGTH(TYPE))
171 /* Write into appropriate registers a function return value
172 of type TYPE, given in virtual format. */
174 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
175 write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
177 /* Extract from an array REGBUF containing the (raw) register state
178 the address in which a function should return its structure value,
179 as a CORE_ADDR (or an expression that can be used as one). */
181 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF))
184 /* Define other aspects of the stack frame. */
186 /* A macro that tells us whether the function invocation represented
187 by FI does not have a frame on the stack associated with it. If it
188 does not, FRAMELESS is set to 1, else 0. */
190 #define FRAMELESS_FUNCTION_INVOCATION(FI) \
191 (frameless_look_for_prologue (FI))
193 /* Any function with a frame looks like this
199 SAVED FP <-FP POINTS HERE
201 LOCALS1 <-SP POINTS HERE
205 #define INIT_EXTRA_FRAME_INFO(fromleaf, fci) ;
206 /* (fci)->frame |= read_register(SEG_T_REGNUM) << 16; */
208 #define FRAME_CHAIN(FRAME) h8500_frame_chain(FRAME)
210 extern CORE_ADDR
h8500_frame_chain (struct frame_info
*);
212 #define FRAME_SAVED_PC(FRAME) frame_saved_pc(FRAME)
213 extern CORE_ADDR
frame_saved_pc (struct frame_info
*frame
);
215 #define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
217 #define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
219 /* Set VAL to the number of args passed to frame described by FI.
220 Can set VAL to -1, meaning no way to tell. */
222 /* We can't tell how many args there are
223 now that the C compiler delays popping them. */
225 #define FRAME_NUM_ARGS(fi) (-1)
227 /* Return number of bytes at start of arglist that are not really args. */
229 #define FRAME_ARGS_SKIP 0
231 /* Put here the code to store, into a struct frame_saved_regs,
232 the addresses of the saved registers of frame described by FRAME_INFO.
233 This includes special registers such as pc and fp saved in special
234 ways in the stack frame. sp is even more special:
235 the address we return for it IS the sp for the next frame. */
237 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
238 frame_find_saved_regs(frame_info, &(frame_saved_regs))
239 struct frame_saved_regs
;
240 extern void frame_find_saved_regs (struct frame_info
*frame_info
,
241 struct frame_saved_regs
*frame_saved_regs
);
244 /* Discard from the stack the innermost frame, restoring all registers. */
246 #define POP_FRAME { h8500_pop_frame (); }
247 extern void h8500_pop_frame (void);
249 #define SHORT_INT_MAX 32767
250 #define SHORT_INT_MIN -32768
252 typedef unsigned short INSN_WORD
;
254 extern CORE_ADDR
h8500_addr_bits_remove (CORE_ADDR
);
255 #define ADDR_BITS_REMOVE(addr) h8500_addr_bits_remove (addr)
257 #define read_memory_short(x) (read_memory_integer(x,2) & 0xffff)
259 #define PRINT_REGISTER_HOOK(regno) print_register_hook(regno)
260 extern void print_register_hook (int);
262 extern int minimum_mode
;
264 #define CALL_DUMMY_LENGTH 10
266 /* Fake variables to make it easy to use 24 bit register pointers */
268 #define IS_TRAPPED_INTERNALVAR h8500_is_trapped_internalvar
269 extern int h8500_is_trapped_internalvar (char *name
);
271 #define VALUE_OF_TRAPPED_INTERNALVAR h8500_value_of_trapped_internalvar
272 extern struct value
*h8500_value_of_trapped_internalvar ( /* struct internalvar *var */ );
274 #define SET_TRAPPED_INTERNALVAR h8500_set_trapped_internalvar
275 extern void h8500_set_trapped_internalvar ( /* struct internalvar *var, value newval, int bitpos, int bitsize, int offset */ );
277 extern CORE_ADDR
h8500_read_sp (void);
278 extern void h8500_write_sp (CORE_ADDR
);
280 extern CORE_ADDR
h8500_read_fp (void);
281 extern void h8500_write_fp (CORE_ADDR
);
283 extern CORE_ADDR
h8500_read_pc (int);
284 extern void h8500_write_pc (CORE_ADDR
, int);
286 #define TARGET_READ_SP() h8500_read_sp()
287 #define TARGET_WRITE_SP(x) h8500_write_sp(x)
289 #define TARGET_READ_PC(pid) h8500_read_pc(pid)
290 #define TARGET_WRITE_PC(x,pid) h8500_write_pc(x,pid)
292 #define TARGET_READ_FP() h8500_read_fp()
293 #define TARGET_WRITE_FP(x) h8500_write_fp(x)
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