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[deliverable/binutils-gdb.git] / gdb / config / h8300 / tm-h8300.h
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c906108c 1/* Parameters for execution on a H8/300 series machine.
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2 Copyright 1992, 1993, 1994, 1996, 1998, 1999, 2000
3 Free Software Foundation, Inc.
c906108c 4
c5aa993b 5 This file is part of GDB.
c906108c 6
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7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
c906108c 11
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12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
c906108c 16
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17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
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21
22/* Contributed by Steve Chamberlain sac@cygnus.com */
23
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24struct frame_info;
25struct frame_saved_regs;
26struct value;
27struct type;
c906108c 28
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29/* 1 if debugging H8/300H application */
30
31/* NOTE: ezannoni 2000-07-18: these variables are part of sim, defined
32 in sim/h8300/compile.c. They really should not be used this
33 way. Because of this we cannot get rid of the macro
34 GDB_TARGET_IS_H8300 in remote-e7000.c */
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35extern int h8300hmode;
36extern int h8300smode;
37
38/* Number of bytes in a word */
39
40#define BINWORD (h8300hmode?4:2)
41
42#define EXTRA_FRAME_INFO \
43 struct frame_saved_regs *fsr; \
44 CORE_ADDR from_pc; \
45 CORE_ADDR args_pointer;\
46 CORE_ADDR locals_pointer ;
47
48/* Zero the frame_saved_regs pointer when the frame is initialized,
49 so that FRAME_FIND_SAVED_REGS () will know to allocate and
50 initialize a frame_saved_regs struct the first time it is called.
51 Set the arg_pointer to -1, which is not valid; 0 and other values
52 indicate real, cached values. */
53
54#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
55 h8300_init_extra_frame_info (fromleaf, fi)
56
57extern void h8300_init_extra_frame_info ();
58
7355ddba 59#define IEEE_FLOAT (1)
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60/* Define the bit, byte, and word ordering of the machine. */
61#define TARGET_BYTE_ORDER BIG_ENDIAN
62#undef TARGET_INT_BIT
63#define TARGET_INT_BIT 16
64#undef TARGET_LONG_BIT
65#define TARGET_LONG_BIT 32
66#undef TARGET_PTR_BIT
67#define TARGET_PTR_BIT (h8300hmode ? 32:16)
68
69/* Offset from address of function to start of its code.
70 Zero on most machines. */
71
72#define FUNCTION_START_OFFSET 0
73
74/* Advance PC across any function entry prologue instructions
75 to reach some "real" code. */
76
b83266a0 77#define SKIP_PROLOGUE(ip) (h8300_skip_prologue(ip))
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78extern CORE_ADDR h8300_skip_prologue ();
79
80/* Immediately after a function call, return the saved pc.
81 Can't always go through the frames for this because on some machines
82 the new frame is not set up until the new function executes
83 some instructions. */
84
85#define SAVED_PC_AFTER_CALL(frame) \
86 read_memory_unsigned_integer (read_register (SP_REGNUM), BINWORD)
87
88/* Stack grows downward. */
89
90#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
91
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92/*#define BREAKPOINT {0x7A, 0xFF} */
93#define BREAKPOINT {0x01, 0x80} /* Sleep */
94#define REMOTE_BREAKPOINT { 0x57, 0x30} /* trapa #3 */
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95/* If your kernel resets the pc after the trap happens you may need to
96 define this before including this file. */
97
98#define DECR_PC_AFTER_BREAK 0
99
100/* Say how long registers are. */
101
102#define REGISTER_SIZE 4
103
c5aa993b 104#define NUM_REGS 13
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105
106#define REGISTER_BYTES (NUM_REGS * 4)
107
108/* Index within `registers' of the first byte of the space for
109 register N. */
110
111#define REGISTER_BYTE(N) ((N) * 4)
112
113/* Number of bytes of storage in the actual machine representation
114 for register N. On the H8/300, all regs are 2 bytes. */
115
116#define REGISTER_RAW_SIZE(N) (h8300hmode ? 4 : 2)
117
118/* Number of bytes of storage in the program's representation
119 for register N. */
120
121#define REGISTER_VIRTUAL_SIZE(N) (h8300hmode ? 4 : 2)
122
123/* Largest value REGISTER_RAW_SIZE can have. */
124
125#define MAX_REGISTER_RAW_SIZE 4
126
127/* Largest value REGISTER_VIRTUAL_SIZE can have. */
128
129#define MAX_REGISTER_VIRTUAL_SIZE 4
130
131/* Return the GDB type object for the "standard" data type
132 of data in register N. */
133
134#define REGISTER_VIRTUAL_TYPE(N) \
135(h8300hmode ? builtin_type_unsigned_long : builtin_type_unsigned_short)
136
137/* Initializer for an array of names of registers.
138 Entries beyond the first NUM_REGS are ignored. */
139
140#define REGISTER_NAMES \
141 {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "sp", "ccr","pc","cycles","tick","inst"}
142
143/* An array of names of registers. */
144
145extern char **h8300_register_names;
146#define REGISTER_NAME(i) h8300_register_names[i]
147
148/* Register numbers of various important registers.
149 Note that some of these values are "real" register numbers,
150 and correspond to the general registers of the machine,
151 and some are "phony" register numbers which are too large
152 to be actual register numbers as far as the user is concerned
153 but do serve to get the desired values when passed to read_register. */
154
155#define ARG0_REGNUM 0 /* first reg in which an arg may be passed */
156#define ARGLAST_REGNUM 2 /* last reg in which an arg may be passed */
157#define FP_REGNUM 6 /* Contain saddress of executing stack frame */
158#define SP_REGNUM 7 /* Contains address of top of stack */
159#define CCR_REGNUM 8 /* Contains processor status */
160#define PC_REGNUM 9 /* Contains program counter */
161
162/* Extract from an array REGBUF containing the (raw) register state
163 a function return value of type TYPE, and copy that, in virtual format,
164 into VALBUF. */
165
166/* FIXME: Won't work with both h8/300's. */
167
a14ed312 168extern void h8300_extract_return_value (struct type *, char *, char *);
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169#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
170 h8300_extract_return_value (TYPE, (char *)(REGBUF), (char *)(VALBUF))
171
172/* Write into appropriate registers a function return value
173 of type TYPE, given in virtual format. Assumes floats are passed
174 in d0/d1. */
175/* FIXME: Won't work with both h8/300's. */
176
a14ed312 177extern void h8300_store_return_value (struct type *, char *);
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178#define STORE_RETURN_VALUE(TYPE,VALBUF) \
179 h8300_store_return_value(TYPE, (char *) (VALBUF))
180
181/* struct passing and returning stuff */
182#define STORE_STRUCT_RETURN(STRUCT_ADDR, SP) \
183 write_register (0, STRUCT_ADDR)
184
185#define USE_STRUCT_CONVENTION(gcc_p, type) (1)
186
187/* Extract from an array REGBUF containing the (raw) register state
188 the address in which a function should return its structure value,
189 as a CORE_ADDR (or an expression that can be used as one). */
190
191#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
192 extract_address (REGBUF + REGISTER_BYTE (0), \
193 REGISTER_RAW_SIZE (0))
c5aa993b 194
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195/* Describe the pointer in each stack frame to the previous stack frame
196 (its caller). */
197
198/* FRAME_CHAIN takes a frame's nominal address
199 and produces the frame's chain-pointer.
200
201 However, if FRAME_CHAIN_VALID returns zero,
202 it means the given frame is the outermost one and has no caller. */
203
204#define FRAME_CHAIN(FRAME) h8300_frame_chain(FRAME)
a14ed312 205CORE_ADDR h8300_frame_chain (struct frame_info *);
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206
207/* In the case of the H8/300, the frame's nominal address
208 is the address of a 2-byte word containing the calling frame's address. */
209
210/* Use the alternate method of avoiding running up off the end of
211 the frame chain or following frames back into the startup code.
212 See the comments in objfile.h */
213
c4093a6a 214#define FRAME_CHAIN_VALID(fp,fi) func_frame_chain_valid (fp, fi)
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215
216/* Define other aspects of the stack frame. */
217
218/* A macro that tells us whether the function invocation represented
219 by FI does not have a frame on the stack associated with it. If it
220 does not, FRAMELESS is set to 1, else 0. */
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221#define FRAMELESS_FUNCTION_INVOCATION(FI) \
222 (frameless_look_for_prologue (FI))
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223
224/* Any function with a frame looks like this
225 SECOND ARG
226 FIRST ARG
227 RET PC
228 SAVED R2
229 SAVED R3
230 SAVED FP <-FP POINTS HERE
231 LOCALS0
232 LOCALS1 <-SP POINTS HERE
c5aa993b 233 */
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234
235#define FRAME_SAVED_PC(FRAME) h8300_frame_saved_pc(FRAME)
236
237#define FRAME_ARGS_ADDRESS(fi) frame_args_address(fi)
238
239#define FRAME_LOCALS_ADDRESS(fi) frame_locals_address(fi);
240
241/* Set VAL to the number of args passed to frame described by FI.
242 Can set VAL to -1, meaning no way to tell. */
243
244/* We can't tell how many args there are
245 now that the C compiler delays popping them. */
246
392a587b 247#define FRAME_NUM_ARGS(fi) (-1)
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248
249/* Return number of bytes at start of arglist that are not really args. */
250
251#define FRAME_ARGS_SKIP 0
252
253/* Put here the code to store, into a struct frame_saved_regs,
254 the addresses of the saved registers of frame described by FRAME_INFO.
255 This includes special registers such as pc and fp saved in special
256 ways in the stack frame. sp is even more special:
257 the address we return for it IS the sp for the next frame. */
258
259#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
260 h8300_frame_find_saved_regs(frame_info, &(frame_saved_regs))
261\f
262
263typedef unsigned short INSN_WORD;
264
265
266#define PRINT_REGISTER_HOOK(regno) print_register_hook(regno)
267
268#define GDB_TARGET_IS_H8300
269
270#define NUM_REALREGS 10
c5aa993b 271#define NOP { 0x01, 0x80} /* A sleep insn */
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272
273#define BELIEVE_PCC_PROMOTION 1
274
275/*
276 * CALL_DUMMY stuff:
277 */
278
7a292a7a 279#define USE_GENERIC_DUMMY_FRAMES 1
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280#define CALL_DUMMY {0}
281#define CALL_DUMMY_LENGTH (0)
282#define CALL_DUMMY_ADDRESS() entry_point_address ()
283#define CALL_DUMMY_LOCATION AT_ENTRY_POINT
284#define CALL_DUMMY_START_OFFSET (0)
285#define CALL_DUMMY_BREAKPOINT_OFFSET (0)
286
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287extern CORE_ADDR h8300_push_arguments (int nargs,
288 struct value **args,
289 CORE_ADDR sp,
290 unsigned char struct_return,
291 CORE_ADDR struct_addr);
292extern CORE_ADDR h8300_push_return_address (CORE_ADDR, CORE_ADDR);
c906108c 293
7a292a7a 294#define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP)
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295#define FIX_CALL_DUMMY(DUMMY, START_SP, FUNADDR, NARGS, ARGS, TYPE, GCCP)
296#define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
392a587b 297 (h8300_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR))
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298/* Push an empty stack frame, to record the current PC, etc. */
299#define PUSH_DUMMY_FRAME generic_push_dummy_frame ()
300/* Discard from the stack the innermost frame, restoring all registers. */
301#define POP_FRAME h8300_pop_frame ()
302#define PUSH_RETURN_ADDRESS(PC, SP) h8300_push_return_address (PC, SP)
303
304/* override the standard get_saved_register function with
305 one that takes account of generic CALL_DUMMY frames */
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306#define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \
307 generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
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