import gdb-1999-05-25 snapshot
[deliverable/binutils-gdb.git] / gdb / config / sh / tm-sh.h
1 /* Target-specific definition for a Hitachi Super-H.
2 Copyright (C) 1993 Free Software Foundation, Inc.
3
4 This file is part of GDB.
5
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.
10
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.
15
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, Boston, MA 02111-1307, USA. */
19
20 /* Contributed by Steve Chamberlain sac@cygnus.com */
21
22 #ifdef __STDC__
23 struct frame_info;
24 struct frame_saved_regs;
25 struct value;
26 struct type;
27 #endif
28
29 #define GDB_TARGET_IS_SH
30
31 #define IEEE_FLOAT 1
32
33 /* Define the bit, byte, and word ordering of the machine. */
34
35 #define TARGET_BYTE_ORDER_SELECTABLE
36
37
38 /* Offset from address of function to start of its code.
39 Zero on most machines. */
40
41 #define FUNCTION_START_OFFSET 0
42
43 /* Advance PC across any function entry prologue instructions
44 to reach some "real" code. */
45
46 extern CORE_ADDR sh_skip_prologue PARAMS ((CORE_ADDR));
47 #define SKIP_PROLOGUE(ip) (sh_skip_prologue (ip))
48
49 /* Immediately after a function call, return the saved pc.
50 Can't always go through the frames for this because on some machines
51 the new frame is not set up until the new function executes
52 some instructions.
53
54 The return address is the value saved in the PR register + 4 */
55
56 #define SAVED_PC_AFTER_CALL(frame) (ADDR_BITS_REMOVE(read_register(PR_REGNUM)))
57
58 /* Stack grows downward. */
59
60 #define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
61
62 /* Illegal instruction - used by the simulator for breakpoint
63 detection */
64
65 #define BREAKPOINT {0xc3, 0xc3} /* 0xc3c3 is trapa #c3, and it works in big
66 and little endian modes */
67
68 #define BIG_REMOTE_BREAKPOINT { 0xc3, 0x20 }
69 #define LITTLE_REMOTE_BREAKPOINT { 0x20, 0xc3 }
70
71 /* If your kernel resets the pc after the trap happens you may need to
72 define this before including this file. */
73 #define DECR_PC_AFTER_BREAK 0
74
75 /* Say how long registers are. */
76 #define REGISTER_TYPE long
77
78 /* Say how much memory is needed to store a copy of the register set */
79 #define REGISTER_BYTES (NUM_REGS*4)
80
81 /* Index within `registers' of the first byte of the space for
82 register N. */
83
84 #define REGISTER_BYTE(N) ((N)*4)
85
86 /* Number of bytes of storage in the actual machine representation
87 for register N. */
88
89 #define REGISTER_RAW_SIZE(N) 4
90
91 #define REGISTER_VIRTUAL_SIZE(N) 4
92
93 /* Largest value REGISTER_RAW_SIZE can have. */
94
95 #define MAX_REGISTER_RAW_SIZE 4
96
97 /* Largest value REGISTER_VIRTUAL_SIZE can have. */
98
99 #define MAX_REGISTER_VIRTUAL_SIZE 4
100
101 /* Return the GDB type object for the "standard" data type
102 of data in register N. */
103
104 #define REGISTER_VIRTUAL_TYPE(N) \
105 ((((N) >= FP0_REGNUM && (N) <= FP15_REGNUM) \
106 || (N) == FPUL_REGNUM) \
107 ? builtin_type_float : builtin_type_int)
108
109 /* Initializer for an array of names of registers.
110 Entries beyond the first NUM_REGS are ignored. */
111
112 extern char **sh_register_names;
113 #define REGISTER_NAME(i) sh_register_names[i]
114
115 #define NUM_REGS 59
116
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. */
123
124 #define R0_REGNUM 0
125 #define STRUCT_RETURN_REGNUM 2
126 #define ARG0_REGNUM 4
127 #define ARGLAST_REGNUM 7
128 #define FP_REGNUM 14
129 #define SP_REGNUM 15
130 #define PC_REGNUM 16
131 #define PR_REGNUM 17
132 #define GBR_REGNUM 18
133 #define VBR_REGNUM 19
134 #define MACH_REGNUM 20
135 #define MACL_REGNUM 21
136 #define SR_REGNUM 22
137 #define FPUL_REGNUM 23
138 #define FPSCR_REGNUM 24
139 #define FP0_REGNUM 25
140 #define FP15_REGNUM 40
141 #define SSR_REGNUM 41
142 #define SPC_REGNUM 42
143 #define R0B0_REGNUM 43
144 #define R0B1_REGNUM 51
145
146 #define NUM_REALREGS 59
147
148 /* Store the address of the place in which to copy the structure the
149 subroutine will return. This is called from call_function.
150
151 We store structs through a pointer passed in R0 */
152
153 #define STORE_STRUCT_RETURN(ADDR, SP) \
154 { write_register (STRUCT_RETURN_REGNUM, (ADDR)); }
155
156 extern use_struct_convention_fn sh_use_struct_convention;
157 #define USE_STRUCT_CONVENTION(gcc_p, type) sh_use_struct_convention (gcc_p, type)
158
159 /* Extract from an array REGBUF containing the (raw) register state
160 a function return value of type TYPE, and copy that, in virtual format,
161 into VALBUF. */
162
163 extern void sh_extract_return_value PARAMS ((struct type *, void *, void *));
164 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
165 sh_extract_return_value (TYPE, REGBUF, VALBUF)
166
167 /* Write into appropriate registers a function return value
168 of type TYPE, given in virtual format.
169
170 Things always get returned in R0/R1 */
171
172 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
173 write_register_bytes (REGISTER_BYTE(0), VALBUF, TYPE_LENGTH (TYPE))
174
175 /* Extract from an array REGBUF containing the (raw) register state
176 the address in which a function should return its structure value,
177 as a CORE_ADDR (or an expression that can be used as one). */
178
179 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
180 extract_address (REGBUF, REGISTER_RAW_SIZE (0))
181
182
183 /* Define other aspects of the stack frame.
184 we keep a copy of the worked out return pc lying around, since it
185 is a useful bit of info */
186
187 #define EXTRA_FRAME_INFO \
188 CORE_ADDR return_pc; \
189 int leaf_function; \
190 int f_offset;
191
192 #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
193 sh_init_extra_frame_info(fromleaf, fi)
194 extern void sh_init_extra_frame_info PARAMS ((int, struct frame_info *));
195
196 /* A macro that tells us whether the function invocation represented
197 by FI does not have a frame on the stack associated with it. If it
198 does not, FRAMELESS is set to 1, else 0. */
199
200 #define FRAMELESS_FUNCTION_INVOCATION(FI) \
201 (frameless_look_for_prologue(FI))
202
203 #define FRAME_SAVED_PC(FRAME) ((FRAME)->return_pc)
204 #define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
205 #define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
206
207 /* Set VAL to the number of args passed to frame described by FI.
208 Can set VAL to -1, meaning no way to tell. */
209
210 /* We can't tell how many args there are */
211
212 #define FRAME_NUM_ARGS(fi) (-1)
213
214 /* Return number of bytes at start of arglist that are not really args. */
215
216 #define FRAME_ARGS_SKIP 0
217
218 extern void sh_frame_find_saved_regs PARAMS ((struct frame_info *fi,
219 struct frame_saved_regs *fsr));
220
221 /* Put here the code to store, into a struct frame_saved_regs,
222 the addresses of the saved registers of frame described by FRAME_INFO.
223 This includes special registers such as pc and fp saved in special
224 ways in the stack frame. sp is even more special:
225 the address we return for it IS the sp for the next frame. */
226
227 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
228 sh_frame_find_saved_regs(frame_info, &(frame_saved_regs))
229
230 #define NAMES_HAVE_UNDERSCORE
231
232 typedef unsigned short INSN_WORD;
233
234 extern CORE_ADDR sh_push_arguments PARAMS ((int nargs,
235 struct value **args,
236 CORE_ADDR sp,
237 unsigned char struct_return,
238 CORE_ADDR struct_addr));
239
240 #define USE_GENERIC_DUMMY_FRAMES 1
241 #define CALL_DUMMY {0}
242 #define CALL_DUMMY_LENGTH (0)
243 #define CALL_DUMMY_START_OFFSET (0)
244 #define CALL_DUMMY_BREAKPOINT_OFFSET (0)
245 #define FIX_CALL_DUMMY(DUMMY, STARTADDR, FUNADDR, NARGS, ARGS, TYPE, GCCP)
246 #define CALL_DUMMY_LOCATION AT_ENTRY_POINT
247 #define CALL_DUMMY_ADDRESS() entry_point_address ()
248 extern CORE_ADDR sh_push_return_address PARAMS ((CORE_ADDR, CORE_ADDR));
249 #define PUSH_RETURN_ADDRESS(PC, SP) sh_push_return_address (PC, SP)
250
251
252 extern CORE_ADDR sh_frame_chain PARAMS ((struct frame_info *));
253 #define FRAME_CHAIN(FRAME) sh_frame_chain(FRAME)
254 #define PUSH_DUMMY_FRAME generic_push_dummy_frame ()
255 #define FRAME_CHAIN_VALID(FP, FRAME) generic_frame_chain_valid (FP, FRAME)
256 #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP)
257 #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
258 (sh_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR))
259
260 /* override the standard get_saved_register function with
261 one that takes account of generic CALL_DUMMY frames */
262 #define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \
263 generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
264
265 /* Discard from the stack the innermost frame, restoring all saved
266 registers. */
267
268 extern void sh_pop_frame PARAMS ((void));
269 #define POP_FRAME sh_pop_frame();
270
271 #define NOP {0x20, 0x0b}
272
273 #define REGISTER_SIZE 4
274
275 #define COERCE_FLOAT_TO_DOUBLE 1
276
277 #define BELIEVE_PCC_PROMOTION 1
278
279 /* Need this for WinGDB. See gdb/mswin/{regdoc.h, gdbwin.c, gui.cpp}. */
280 #define TARGET_SH
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