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Fix whitespace problem in my most recent entry.
[binutils.git] / gdb / config / h8300 / tm-h8300.h
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c906108c 1/* Parameters for execution on a H8/300 series machine.
cc17453a 2 Copyright 1992, 1993, 2000 Free Software Foundation, Inc.
c906108c 3
c5aa993b 4 This file is part of GDB.
c906108c 5
c5aa993b
JM
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
c5aa993b
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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. */
c906108c
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20
21/* Contributed by Steve Chamberlain [email protected] */
22
c906108c
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23struct frame_info;
24struct frame_saved_regs;
25struct value;
26struct type;
c906108c 27
cc17453a
EZ
28/* 1 if debugging H8/300H application */
29
30/* NOTE: ezannoni 2000-07-18: these variables are part of sim, defined
31 in sim/h8300/compile.c. They really should not be used this
32 way. Because of this we cannot get rid of the macro
33 GDB_TARGET_IS_H8300 in remote-e7000.c */
c906108c
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34extern int h8300hmode;
35extern int h8300smode;
36
37/* Number of bytes in a word */
38
39#define BINWORD (h8300hmode?4:2)
40
41#define EXTRA_FRAME_INFO \
42 struct frame_saved_regs *fsr; \
43 CORE_ADDR from_pc; \
44 CORE_ADDR args_pointer;\
45 CORE_ADDR locals_pointer ;
46
47/* Zero the frame_saved_regs pointer when the frame is initialized,
48 so that FRAME_FIND_SAVED_REGS () will know to allocate and
49 initialize a frame_saved_regs struct the first time it is called.
50 Set the arg_pointer to -1, which is not valid; 0 and other values
51 indicate real, cached values. */
52
53#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
54 h8300_init_extra_frame_info (fromleaf, fi)
55
56extern void h8300_init_extra_frame_info ();
57
7355ddba 58#define IEEE_FLOAT (1)
c906108c
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59/* Define the bit, byte, and word ordering of the machine. */
60#define TARGET_BYTE_ORDER BIG_ENDIAN
61#undef TARGET_INT_BIT
62#define TARGET_INT_BIT 16
63#undef TARGET_LONG_BIT
64#define TARGET_LONG_BIT 32
65#undef TARGET_PTR_BIT
66#define TARGET_PTR_BIT (h8300hmode ? 32:16)
67
68/* Offset from address of function to start of its code.
69 Zero on most machines. */
70
71#define FUNCTION_START_OFFSET 0
72
73/* Advance PC across any function entry prologue instructions
74 to reach some "real" code. */
75
b83266a0 76#define SKIP_PROLOGUE(ip) (h8300_skip_prologue(ip))
c906108c
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77extern CORE_ADDR h8300_skip_prologue ();
78
79/* Immediately after a function call, return the saved pc.
80 Can't always go through the frames for this because on some machines
81 the new frame is not set up until the new function executes
82 some instructions. */
83
84#define SAVED_PC_AFTER_CALL(frame) \
85 read_memory_unsigned_integer (read_register (SP_REGNUM), BINWORD)
86
87/* Stack grows downward. */
88
89#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
90
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JM
91/*#define BREAKPOINT {0x7A, 0xFF} */
92#define BREAKPOINT {0x01, 0x80} /* Sleep */
93#define REMOTE_BREAKPOINT { 0x57, 0x30} /* trapa #3 */
c906108c
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94/* If your kernel resets the pc after the trap happens you may need to
95 define this before including this file. */
96
97#define DECR_PC_AFTER_BREAK 0
98
99/* Say how long registers are. */
100
101#define REGISTER_SIZE 4
102
c5aa993b 103#define NUM_REGS 13
c906108c
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104
105#define REGISTER_BYTES (NUM_REGS * 4)
106
107/* Index within `registers' of the first byte of the space for
108 register N. */
109
110#define REGISTER_BYTE(N) ((N) * 4)
111
112/* Number of bytes of storage in the actual machine representation
113 for register N. On the H8/300, all regs are 2 bytes. */
114
115#define REGISTER_RAW_SIZE(N) (h8300hmode ? 4 : 2)
116
117/* Number of bytes of storage in the program's representation
118 for register N. */
119
120#define REGISTER_VIRTUAL_SIZE(N) (h8300hmode ? 4 : 2)
121
122/* Largest value REGISTER_RAW_SIZE can have. */
123
124#define MAX_REGISTER_RAW_SIZE 4
125
126/* Largest value REGISTER_VIRTUAL_SIZE can have. */
127
128#define MAX_REGISTER_VIRTUAL_SIZE 4
129
130/* Return the GDB type object for the "standard" data type
131 of data in register N. */
132
133#define REGISTER_VIRTUAL_TYPE(N) \
134(h8300hmode ? builtin_type_unsigned_long : builtin_type_unsigned_short)
135
136/* Initializer for an array of names of registers.
137 Entries beyond the first NUM_REGS are ignored. */
138
139#define REGISTER_NAMES \
140 {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "sp", "ccr","pc","cycles","tick","inst"}
141
142/* An array of names of registers. */
143
144extern char **h8300_register_names;
145#define REGISTER_NAME(i) h8300_register_names[i]
146
147/* Register numbers of various important registers.
148 Note that some of these values are "real" register numbers,
149 and correspond to the general registers of the machine,
150 and some are "phony" register numbers which are too large
151 to be actual register numbers as far as the user is concerned
152 but do serve to get the desired values when passed to read_register. */
153
154#define ARG0_REGNUM 0 /* first reg in which an arg may be passed */
155#define ARGLAST_REGNUM 2 /* last reg in which an arg may be passed */
156#define FP_REGNUM 6 /* Contain saddress of executing stack frame */
157#define SP_REGNUM 7 /* Contains address of top of stack */
158#define CCR_REGNUM 8 /* Contains processor status */
159#define PC_REGNUM 9 /* Contains program counter */
160
161/* Extract from an array REGBUF containing the (raw) register state
162 a function return value of type TYPE, and copy that, in virtual format,
163 into VALBUF. */
164
165/* FIXME: Won't work with both h8/300's. */
166
a14ed312 167extern void h8300_extract_return_value (struct type *, char *, char *);
c906108c
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168#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
169 h8300_extract_return_value (TYPE, (char *)(REGBUF), (char *)(VALBUF))
170
171/* Write into appropriate registers a function return value
172 of type TYPE, given in virtual format. Assumes floats are passed
173 in d0/d1. */
174/* FIXME: Won't work with both h8/300's. */
175
a14ed312 176extern void h8300_store_return_value (struct type *, char *);
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177#define STORE_RETURN_VALUE(TYPE,VALBUF) \
178 h8300_store_return_value(TYPE, (char *) (VALBUF))
179
180/* struct passing and returning stuff */
181#define STORE_STRUCT_RETURN(STRUCT_ADDR, SP) \
182 write_register (0, STRUCT_ADDR)
183
184#define USE_STRUCT_CONVENTION(gcc_p, type) (1)
185
186/* Extract from an array REGBUF containing the (raw) register state
187 the address in which a function should return its structure value,
188 as a CORE_ADDR (or an expression that can be used as one). */
189
190#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
191 extract_address (REGBUF + REGISTER_BYTE (0), \
192 REGISTER_RAW_SIZE (0))
c5aa993b 193
c906108c
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194/* Describe the pointer in each stack frame to the previous stack frame
195 (its caller). */
196
197/* FRAME_CHAIN takes a frame's nominal address
198 and produces the frame's chain-pointer.
199
200 However, if FRAME_CHAIN_VALID returns zero,
201 it means the given frame is the outermost one and has no caller. */
202
203#define FRAME_CHAIN(FRAME) h8300_frame_chain(FRAME)
a14ed312 204CORE_ADDR h8300_frame_chain (struct frame_info *);
c906108c
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205
206/* In the case of the H8/300, the frame's nominal address
207 is the address of a 2-byte word containing the calling frame's address. */
208
209/* Use the alternate method of avoiding running up off the end of
210 the frame chain or following frames back into the startup code.
211 See the comments in objfile.h */
212
c4093a6a 213#define FRAME_CHAIN_VALID(fp,fi) func_frame_chain_valid (fp, fi)
c906108c
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214
215/* Define other aspects of the stack frame. */
216
217/* A macro that tells us whether the function invocation represented
218 by FI does not have a frame on the stack associated with it. If it
219 does not, FRAMELESS is set to 1, else 0. */
392a587b
JM
220#define FRAMELESS_FUNCTION_INVOCATION(FI) \
221 (frameless_look_for_prologue (FI))
c906108c
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222
223/* Any function with a frame looks like this
224 SECOND ARG
225 FIRST ARG
226 RET PC
227 SAVED R2
228 SAVED R3
229 SAVED FP <-FP POINTS HERE
230 LOCALS0
231 LOCALS1 <-SP POINTS HERE
c5aa993b 232 */
c906108c
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233
234#define FRAME_SAVED_PC(FRAME) h8300_frame_saved_pc(FRAME)
235
236#define FRAME_ARGS_ADDRESS(fi) frame_args_address(fi)
237
238#define FRAME_LOCALS_ADDRESS(fi) frame_locals_address(fi);
239
240/* Set VAL to the number of args passed to frame described by FI.
241 Can set VAL to -1, meaning no way to tell. */
242
243/* We can't tell how many args there are
244 now that the C compiler delays popping them. */
245
392a587b 246#define FRAME_NUM_ARGS(fi) (-1)
c906108c
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247
248/* Return number of bytes at start of arglist that are not really args. */
249
250#define FRAME_ARGS_SKIP 0
251
252/* Put here the code to store, into a struct frame_saved_regs,
253 the addresses of the saved registers of frame described by FRAME_INFO.
254 This includes special registers such as pc and fp saved in special
255 ways in the stack frame. sp is even more special:
256 the address we return for it IS the sp for the next frame. */
257
258#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
259 h8300_frame_find_saved_regs(frame_info, &(frame_saved_regs))
260\f
261
262typedef unsigned short INSN_WORD;
263
264
265#define PRINT_REGISTER_HOOK(regno) print_register_hook(regno)
266
267#define GDB_TARGET_IS_H8300
268
269#define NUM_REALREGS 10
c5aa993b 270#define NOP { 0x01, 0x80} /* A sleep insn */
c906108c
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271
272#define BELIEVE_PCC_PROMOTION 1
273
274/*
275 * CALL_DUMMY stuff:
276 */
277
7a292a7a 278#define USE_GENERIC_DUMMY_FRAMES 1
c906108c
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279#define CALL_DUMMY {0}
280#define CALL_DUMMY_LENGTH (0)
281#define CALL_DUMMY_ADDRESS() entry_point_address ()
282#define CALL_DUMMY_LOCATION AT_ENTRY_POINT
283#define CALL_DUMMY_START_OFFSET (0)
284#define CALL_DUMMY_BREAKPOINT_OFFSET (0)
285
a14ed312
KB
286extern CORE_ADDR h8300_push_arguments (int nargs,
287 struct value **args,
288 CORE_ADDR sp,
289 unsigned char struct_return,
290 CORE_ADDR struct_addr);
291extern CORE_ADDR h8300_push_return_address (CORE_ADDR, CORE_ADDR);
c906108c 292
7a292a7a 293#define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP)
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294#define FIX_CALL_DUMMY(DUMMY, START_SP, FUNADDR, NARGS, ARGS, TYPE, GCCP)
295#define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
392a587b 296 (h8300_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR))
c906108c
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297/* Push an empty stack frame, to record the current PC, etc. */
298#define PUSH_DUMMY_FRAME generic_push_dummy_frame ()
299/* Discard from the stack the innermost frame, restoring all registers. */
300#define POP_FRAME h8300_pop_frame ()
301#define PUSH_RETURN_ADDRESS(PC, SP) h8300_push_return_address (PC, SP)
302
303/* override the standard get_saved_register function with
304 one that takes account of generic CALL_DUMMY frames */
7a292a7a
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305#define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \
306 generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
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