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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,
19 Boston, MA 02111-1307, USA. */
20
21 /* Contributed by Steve Chamberlain sac@cygnus.com */
22
23 #ifdef __STDC__
24 struct frame_info;
25 struct frame_saved_regs;
26 struct value;
27 struct type;
28 #endif
29
30 #define GDB_TARGET_IS_SH
31
32 #define IEEE_FLOAT 1
33
34 /* Define the bit, byte, and word ordering of the machine. */
35
36 #define TARGET_BYTE_ORDER_SELECTABLE
37
38
39 /* Offset from address of function to start of its code.
40 Zero on most machines. */
41
42 #define FUNCTION_START_OFFSET 0
43
44 /* Advance PC across any function entry prologue instructions
45 to reach some "real" code. */
46
47 extern CORE_ADDR sh_skip_prologue PARAMS ((CORE_ADDR));
48 #define SKIP_PROLOGUE(ip) (sh_skip_prologue (ip))
49
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
53 some instructions.
54
55 The return address is the value saved in the PR register + 4 */
56
57 #define SAVED_PC_AFTER_CALL(frame) (ADDR_BITS_REMOVE(read_register(PR_REGNUM)))
58
59 /* Stack grows downward. */
60
61 #define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
62
63 /* Illegal instruction - used by the simulator for breakpoint
64 detection */
65
66 #define BREAKPOINT {0xc3, 0xc3} /* 0xc3c3 is trapa #c3, and it works in big
67 and little endian modes */
68
69 #define BIG_REMOTE_BREAKPOINT { 0xc3, 0x20 }
70 #define LITTLE_REMOTE_BREAKPOINT { 0x20, 0xc3 }
71
72 /* If your kernel resets the pc after the trap happens you may need to
73 define this before including this file. */
74 #define DECR_PC_AFTER_BREAK 0
75
76 /* Say how long registers are. */
77 #define REGISTER_TYPE long
78
79 /* Say how much memory is needed to store a copy of the register set */
80 #define REGISTER_BYTES (NUM_REGS*4)
81
82 /* Index within `registers' of the first byte of the space for
83 register N. */
84
85 #define REGISTER_BYTE(N) ((N)*4)
86
87 /* Number of bytes of storage in the actual machine representation
88 for register N. */
89
90 #define REGISTER_RAW_SIZE(N) 4
91
92 #define REGISTER_VIRTUAL_SIZE(N) 4
93
94 /* Largest value REGISTER_RAW_SIZE can have. */
95
96 #define MAX_REGISTER_RAW_SIZE 4
97
98 /* Largest value REGISTER_VIRTUAL_SIZE can have. */
99
100 #define MAX_REGISTER_VIRTUAL_SIZE 4
101
102 /* Return the GDB type object for the "standard" data type
103 of data in register N. */
104
105 #define REGISTER_VIRTUAL_TYPE(N) \
106 ((((N) >= FP0_REGNUM && (N) <= FP15_REGNUM) \
107 || (N) == FPUL_REGNUM) \
108 ? builtin_type_float : builtin_type_int)
109
110 /* Initializer for an array of names of registers.
111 Entries beyond the first NUM_REGS are ignored. */
112
113 extern char **sh_register_names;
114 #define REGISTER_NAME(i) sh_register_names[i]
115
116 #define NUM_REGS 59
117
118 /* Register numbers of various important registers. Note that some of
119 these values are "real" register numbers, and correspond to the
120 general registers of the machine, and some are "phony" register
121 numbers which are too large to be actual register numbers as far as
122 the user is concerned but do serve to get the desired values when
123 passed to read_register. */
124
125 #define R0_REGNUM 0
126 #define STRUCT_RETURN_REGNUM 2
127 #define ARG0_REGNUM 4
128 #define ARGLAST_REGNUM 7
129 #define FP_REGNUM 14
130 #define SP_REGNUM 15
131 #define PC_REGNUM 16
132 #define PR_REGNUM 17
133 #define GBR_REGNUM 18
134 #define VBR_REGNUM 19
135 #define MACH_REGNUM 20
136 #define MACL_REGNUM 21
137 #define SR_REGNUM 22
138 #define FPUL_REGNUM 23
139 #define FPSCR_REGNUM 24
140 #define FP0_REGNUM 25
141 #define FP15_REGNUM 40
142 #define SSR_REGNUM 41
143 #define SPC_REGNUM 42
144 #define R0B0_REGNUM 43
145 #define R0B1_REGNUM 51
146
147 #define NUM_REALREGS 59
148
149 /* Store the address of the place in which to copy the structure the
150 subroutine will return. This is called from call_function.
151
152 We store structs through a pointer passed in R0 */
153
154 #define STORE_STRUCT_RETURN(ADDR, SP) \
155 { write_register (STRUCT_RETURN_REGNUM, (ADDR)); }
156
157 extern use_struct_convention_fn sh_use_struct_convention;
158 #define USE_STRUCT_CONVENTION(gcc_p, type) sh_use_struct_convention (gcc_p, type)
159
160 /* Extract from an array REGBUF containing the (raw) register state
161 a function return value of type TYPE, and copy that, in virtual format,
162 into VALBUF. */
163
164 extern void sh_extract_return_value PARAMS ((struct type *, void *, void *));
165 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
166 sh_extract_return_value (TYPE, REGBUF, VALBUF)
167
168 /* Write into appropriate registers a function return value
169 of type TYPE, given in virtual format.
170
171 Things always get returned in R0/R1 */
172
173 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
174 write_register_bytes (REGISTER_BYTE(0), VALBUF, TYPE_LENGTH (TYPE))
175
176 /* Extract from an array REGBUF containing the (raw) register state
177 the address in which a function should return its structure value,
178 as a CORE_ADDR (or an expression that can be used as one). */
179
180 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
181 extract_address (REGBUF, REGISTER_RAW_SIZE (0))
182
183
184 /* Define other aspects of the stack frame.
185 we keep a copy of the worked out return pc lying around, since it
186 is a useful bit of info */
187
188 #define EXTRA_FRAME_INFO \
189 CORE_ADDR return_pc; \
190 int leaf_function; \
191 int f_offset;
192
193 #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
194 sh_init_extra_frame_info(fromleaf, fi)
195 extern void sh_init_extra_frame_info PARAMS ((int, struct frame_info *));
196
197 /* A macro that tells us whether the function invocation represented
198 by FI does not have a frame on the stack associated with it. If it
199 does not, FRAMELESS is set to 1, else 0. */
200
201 #define FRAMELESS_FUNCTION_INVOCATION(FI) \
202 (frameless_look_for_prologue(FI))
203
204 #define FRAME_SAVED_PC(FRAME) ((FRAME)->return_pc)
205 #define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
206 #define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
207
208 /* Set VAL to the number of args passed to frame described by FI.
209 Can set VAL to -1, meaning no way to tell. */
210
211 /* We can't tell how many args there are */
212
213 #define FRAME_NUM_ARGS(fi) (-1)
214
215 /* Return number of bytes at start of arglist that are not really args. */
216
217 #define FRAME_ARGS_SKIP 0
218
219 extern void sh_frame_find_saved_regs PARAMS ((struct frame_info * fi,
220 struct frame_saved_regs * fsr));
221
222 /* Put here the code to store, into a struct frame_saved_regs,
223 the addresses of the saved registers of frame described by FRAME_INFO.
224 This includes special registers such as pc and fp saved in special
225 ways in the stack frame. sp is even more special:
226 the address we return for it IS the sp for the next frame. */
227
228 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
229 sh_frame_find_saved_regs(frame_info, &(frame_saved_regs))
230
231 typedef unsigned short INSN_WORD;
232
233 extern CORE_ADDR sh_push_arguments PARAMS ((int nargs,
234 struct value ** args,
235 CORE_ADDR sp,
236 unsigned char struct_return,
237 CORE_ADDR struct_addr));
238
239 #define USE_GENERIC_DUMMY_FRAMES 1
240 #define CALL_DUMMY {0}
241 #define CALL_DUMMY_LENGTH (0)
242 #define CALL_DUMMY_START_OFFSET (0)
243 #define CALL_DUMMY_BREAKPOINT_OFFSET (0)
244 #define FIX_CALL_DUMMY(DUMMY, STARTADDR, FUNADDR, NARGS, ARGS, TYPE, GCCP)
245 #define CALL_DUMMY_LOCATION AT_ENTRY_POINT
246 #define CALL_DUMMY_ADDRESS() entry_point_address ()
247 extern CORE_ADDR sh_push_return_address PARAMS ((CORE_ADDR, CORE_ADDR));
248 #define PUSH_RETURN_ADDRESS(PC, SP) sh_push_return_address (PC, SP)
249
250
251 extern CORE_ADDR sh_frame_chain PARAMS ((struct frame_info *));
252 #define FRAME_CHAIN(FRAME) sh_frame_chain(FRAME)
253 #define PUSH_DUMMY_FRAME generic_push_dummy_frame ()
254 #define FRAME_CHAIN_VALID(FP, FRAME) generic_frame_chain_valid (FP, FRAME)
255 #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP)
256 #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
257 (sh_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR))
258
259 /* override the standard get_saved_register function with
260 one that takes account of generic CALL_DUMMY frames */
261 #define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \
262 generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
263
264 /* Discard from the stack the innermost frame, restoring all saved
265 registers. */
266
267 extern void sh_pop_frame PARAMS ((void));
268 #define POP_FRAME sh_pop_frame();
269
270 #define NOP {0x20, 0x0b}
271
272 #define REGISTER_SIZE 4
273
274 #define COERCE_FLOAT_TO_DOUBLE 1
275
276 #define BELIEVE_PCC_PROMOTION 1
277
278 /* Need this for WinGDB. See gdb/mswin/{regdoc.h, gdbwin.c, gui.cpp}. */
279 #define TARGET_SH