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