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c906108c SS |
1 | /* Target-specific definition for a Hitachi Super-H. |
2 | Copyright (C) 1993 Free Software Foundation, Inc. | |
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 JM |
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 | |
c5aa993b JM |
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 SS |
20 | |
21 | /* Contributed by Steve Chamberlain sac@cygnus.com */ | |
22 | ||
c906108c SS |
23 | struct frame_info; |
24 | struct frame_saved_regs; | |
25 | struct value; | |
26 | struct type; | |
c906108c SS |
27 | |
28 | #define GDB_TARGET_IS_SH | |
29 | ||
7355ddba | 30 | #define IEEE_FLOAT (1) |
c906108c SS |
31 | |
32 | /* Define the bit, byte, and word ordering of the machine. */ | |
33 | ||
34 | #define TARGET_BYTE_ORDER_SELECTABLE | |
35 | ||
36 | ||
37 | /* Offset from address of function to start of its code. | |
38 | Zero on most machines. */ | |
39 | ||
40 | #define FUNCTION_START_OFFSET 0 | |
41 | ||
42 | /* Advance PC across any function entry prologue instructions | |
43 | to reach some "real" code. */ | |
44 | ||
a14ed312 | 45 | extern CORE_ADDR sh_skip_prologue (CORE_ADDR); |
b83266a0 | 46 | #define SKIP_PROLOGUE(ip) (sh_skip_prologue (ip)) |
c906108c | 47 | |
c906108c SS |
48 | /* Immediately after a function call, return the saved pc. |
49 | Can't always go through the frames for this because on some machines | |
50 | the new frame is not set up until the new function executes | |
392a587b | 51 | some instructions. |
c906108c SS |
52 | |
53 | The return address is the value saved in the PR register + 4 */ | |
54 | ||
55 | #define SAVED_PC_AFTER_CALL(frame) (ADDR_BITS_REMOVE(read_register(PR_REGNUM))) | |
56 | ||
57 | /* Stack grows downward. */ | |
58 | ||
59 | #define INNER_THAN(lhs,rhs) ((lhs) < (rhs)) | |
60 | ||
61 | /* Illegal instruction - used by the simulator for breakpoint | |
62 | detection */ | |
63 | ||
c5aa993b JM |
64 | #define BREAKPOINT {0xc3, 0xc3} /* 0xc3c3 is trapa #c3, and it works in big |
65 | and little endian modes */ | |
c906108c SS |
66 | |
67 | #define BIG_REMOTE_BREAKPOINT { 0xc3, 0x20 } | |
68 | #define LITTLE_REMOTE_BREAKPOINT { 0x20, 0xc3 } | |
69 | ||
70 | /* If your kernel resets the pc after the trap happens you may need to | |
71 | define this before including this file. */ | |
72 | #define DECR_PC_AFTER_BREAK 0 | |
73 | ||
74 | /* Say how long registers are. */ | |
75 | #define REGISTER_TYPE long | |
76 | ||
77 | /* Say how much memory is needed to store a copy of the register set */ | |
392a587b | 78 | #define REGISTER_BYTES (NUM_REGS*4) |
c906108c SS |
79 | |
80 | /* Index within `registers' of the first byte of the space for | |
81 | register N. */ | |
82 | ||
83 | #define REGISTER_BYTE(N) ((N)*4) | |
84 | ||
85 | /* Number of bytes of storage in the actual machine representation | |
86 | for register N. */ | |
87 | ||
88 | #define REGISTER_RAW_SIZE(N) 4 | |
89 | ||
90 | #define REGISTER_VIRTUAL_SIZE(N) 4 | |
91 | ||
92 | /* Largest value REGISTER_RAW_SIZE can have. */ | |
93 | ||
94 | #define MAX_REGISTER_RAW_SIZE 4 | |
95 | ||
96 | /* Largest value REGISTER_VIRTUAL_SIZE can have. */ | |
97 | ||
98 | #define MAX_REGISTER_VIRTUAL_SIZE 4 | |
99 | ||
100 | /* Return the GDB type object for the "standard" data type | |
101 | of data in register N. */ | |
102 | ||
103 | #define REGISTER_VIRTUAL_TYPE(N) \ | |
63978407 JR |
104 | (((((N) >= FP0_REGNUM && (N) <= FP15_REGNUM) \ |
105 | || (N) == FPUL_REGNUM) \ | |
106 | && TARGET_ARCHITECTURE->mach != bfd_mach_sh_dsp \ | |
107 | && TARGET_ARCHITECTURE->mach != bfd_mach_sh3_dsp) \ | |
c906108c SS |
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 | |
63978407 | 140 | #define DSR_REGNUM 24 |
c906108c SS |
141 | #define FP0_REGNUM 25 |
142 | #define FP15_REGNUM 40 | |
63978407 JR |
143 | #define A0G_REGNUM 25 |
144 | #define A0_REGNUM 26 | |
145 | #define A1G_REGNUM 27 | |
146 | #define A1_REGNUM 28 | |
147 | #define M0_REGNUM 29 | |
148 | #define M1_REGNUM 30 | |
149 | #define X0_REGNUM 31 | |
150 | #define X1_REGNUM 32 | |
151 | #define Y0_REGNUM 33 | |
152 | #define Y1_REGNUM 34 | |
153 | #define MOD_REGNUM 40 | |
c906108c SS |
154 | #define SSR_REGNUM 41 |
155 | #define SPC_REGNUM 42 | |
156 | #define R0B0_REGNUM 43 | |
157 | #define R0B1_REGNUM 51 | |
63978407 JR |
158 | #define RS_REGNUM 43 |
159 | #define RE_REGNUM 44 | |
160 | #define R0B_REGNUM 51 | |
c906108c SS |
161 | |
162 | #define NUM_REALREGS 59 | |
163 | ||
164 | /* Store the address of the place in which to copy the structure the | |
392a587b | 165 | subroutine will return. This is called from call_function. |
c906108c SS |
166 | |
167 | We store structs through a pointer passed in R0 */ | |
168 | ||
169 | #define STORE_STRUCT_RETURN(ADDR, SP) \ | |
170 | { write_register (STRUCT_RETURN_REGNUM, (ADDR)); } | |
171 | ||
172 | extern use_struct_convention_fn sh_use_struct_convention; | |
173 | #define USE_STRUCT_CONVENTION(gcc_p, type) sh_use_struct_convention (gcc_p, type) | |
174 | ||
175 | /* Extract from an array REGBUF containing the (raw) register state | |
176 | a function return value of type TYPE, and copy that, in virtual format, | |
177 | into VALBUF. */ | |
178 | ||
a14ed312 | 179 | extern void sh_extract_return_value (struct type *, void *, void *); |
c906108c SS |
180 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ |
181 | sh_extract_return_value (TYPE, REGBUF, VALBUF) | |
182 | ||
183 | /* Write into appropriate registers a function return value | |
392a587b | 184 | of type TYPE, given in virtual format. |
c906108c SS |
185 | |
186 | Things always get returned in R0/R1 */ | |
187 | ||
188 | #define STORE_RETURN_VALUE(TYPE,VALBUF) \ | |
189 | write_register_bytes (REGISTER_BYTE(0), VALBUF, TYPE_LENGTH (TYPE)) | |
190 | ||
191 | /* Extract from an array REGBUF containing the (raw) register state | |
192 | the address in which a function should return its structure value, | |
193 | as a CORE_ADDR (or an expression that can be used as one). */ | |
194 | ||
195 | #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \ | |
196 | extract_address (REGBUF, REGISTER_RAW_SIZE (0)) | |
197 | ||
198 | ||
392a587b | 199 | /* Define other aspects of the stack frame. |
c906108c SS |
200 | we keep a copy of the worked out return pc lying around, since it |
201 | is a useful bit of info */ | |
202 | ||
203 | #define EXTRA_FRAME_INFO \ | |
204 | CORE_ADDR return_pc; \ | |
205 | int leaf_function; \ | |
392a587b | 206 | int f_offset; |
c906108c SS |
207 | |
208 | #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \ | |
392a587b | 209 | sh_init_extra_frame_info(fromleaf, fi) |
a14ed312 | 210 | extern void sh_init_extra_frame_info (int, struct frame_info *); |
c906108c SS |
211 | |
212 | /* A macro that tells us whether the function invocation represented | |
213 | by FI does not have a frame on the stack associated with it. If it | |
214 | does not, FRAMELESS is set to 1, else 0. */ | |
215 | ||
392a587b JM |
216 | #define FRAMELESS_FUNCTION_INVOCATION(FI) \ |
217 | (frameless_look_for_prologue(FI)) | |
c906108c SS |
218 | |
219 | #define FRAME_SAVED_PC(FRAME) ((FRAME)->return_pc) | |
220 | #define FRAME_ARGS_ADDRESS(fi) ((fi)->frame) | |
221 | #define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame) | |
222 | ||
223 | /* Set VAL to the number of args passed to frame described by FI. | |
224 | Can set VAL to -1, meaning no way to tell. */ | |
225 | ||
226 | /* We can't tell how many args there are */ | |
227 | ||
392a587b | 228 | #define FRAME_NUM_ARGS(fi) (-1) |
c906108c SS |
229 | |
230 | /* Return number of bytes at start of arglist that are not really args. */ | |
231 | ||
232 | #define FRAME_ARGS_SKIP 0 | |
233 | ||
a14ed312 KB |
234 | extern void sh_frame_find_saved_regs (struct frame_info *fi, |
235 | struct frame_saved_regs *fsr); | |
c906108c SS |
236 | |
237 | /* Put here the code to store, into a struct frame_saved_regs, | |
238 | the addresses of the saved registers of frame described by FRAME_INFO. | |
239 | This includes special registers such as pc and fp saved in special | |
240 | ways in the stack frame. sp is even more special: | |
241 | the address we return for it IS the sp for the next frame. */ | |
242 | ||
243 | #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \ | |
244 | sh_frame_find_saved_regs(frame_info, &(frame_saved_regs)) | |
245 | ||
c906108c SS |
246 | typedef unsigned short INSN_WORD; |
247 | ||
a14ed312 KB |
248 | extern CORE_ADDR sh_push_arguments (int nargs, |
249 | struct value **args, | |
250 | CORE_ADDR sp, | |
251 | unsigned char struct_return, | |
252 | CORE_ADDR struct_addr); | |
c906108c | 253 | |
7a292a7a | 254 | #define USE_GENERIC_DUMMY_FRAMES 1 |
c906108c SS |
255 | #define CALL_DUMMY {0} |
256 | #define CALL_DUMMY_LENGTH (0) | |
257 | #define CALL_DUMMY_START_OFFSET (0) | |
258 | #define CALL_DUMMY_BREAKPOINT_OFFSET (0) | |
392a587b | 259 | #define FIX_CALL_DUMMY(DUMMY, STARTADDR, FUNADDR, NARGS, ARGS, TYPE, GCCP) |
c906108c SS |
260 | #define CALL_DUMMY_LOCATION AT_ENTRY_POINT |
261 | #define CALL_DUMMY_ADDRESS() entry_point_address () | |
a14ed312 | 262 | extern CORE_ADDR sh_push_return_address (CORE_ADDR, CORE_ADDR); |
c906108c SS |
263 | #define PUSH_RETURN_ADDRESS(PC, SP) sh_push_return_address (PC, SP) |
264 | ||
265 | ||
a14ed312 | 266 | extern CORE_ADDR sh_frame_chain (struct frame_info *); |
c906108c SS |
267 | #define FRAME_CHAIN(FRAME) sh_frame_chain(FRAME) |
268 | #define PUSH_DUMMY_FRAME generic_push_dummy_frame () | |
c4093a6a | 269 | #define FRAME_CHAIN_VALID(FP, FRAME) generic_file_frame_chain_valid (FP, FRAME) |
7a292a7a | 270 | #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP) |
c906108c | 271 | #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \ |
392a587b | 272 | (sh_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR)) |
c906108c | 273 | |
392a587b | 274 | /* override the standard get_saved_register function with |
c906108c | 275 | one that takes account of generic CALL_DUMMY frames */ |
7a292a7a SS |
276 | #define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \ |
277 | generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval) | |
c906108c SS |
278 | |
279 | /* Discard from the stack the innermost frame, restoring all saved | |
280 | registers. */ | |
281 | ||
a14ed312 | 282 | extern void sh_pop_frame (void); |
c906108c SS |
283 | #define POP_FRAME sh_pop_frame(); |
284 | ||
285 | #define NOP {0x20, 0x0b} | |
286 | ||
287 | #define REGISTER_SIZE 4 | |
288 | ||
b9a8e3bf | 289 | #define COERCE_FLOAT_TO_DOUBLE(formal, actual) (1) |
c906108c SS |
290 | |
291 | #define BELIEVE_PCC_PROMOTION 1 | |
292 | ||
293 | /* Need this for WinGDB. See gdb/mswin/{regdoc.h, gdbwin.c, gui.cpp}. */ | |
294 | #define TARGET_SH |