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c906108c SS |
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 | ||
b83266a0 SS |
46 | extern CORE_ADDR sh_skip_prologue PARAMS ((CORE_ADDR)); |
47 | #define SKIP_PROLOGUE(ip) (sh_skip_prologue (ip)) | |
c906108c | 48 | |
c906108c SS |
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 | |
392a587b | 52 | some instructions. |
c906108c SS |
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 | ||
392a587b | 65 | #define BREAKPOINT {0xc3, 0xc3} /* 0xc3c3 is trapa #c3, and it works in big |
c906108c SS |
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 */ | |
392a587b | 79 | #define REGISTER_BYTES (NUM_REGS*4) |
c906108c SS |
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 | |
392a587b | 149 | subroutine will return. This is called from call_function. |
c906108c SS |
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 | |
392a587b | 168 | of type TYPE, given in virtual format. |
c906108c SS |
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 | ||
392a587b | 183 | /* Define other aspects of the stack frame. |
c906108c SS |
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; \ | |
392a587b | 190 | int f_offset; |
c906108c SS |
191 | |
192 | #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \ | |
392a587b | 193 | sh_init_extra_frame_info(fromleaf, fi) |
c906108c SS |
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 | ||
392a587b JM |
200 | #define FRAMELESS_FUNCTION_INVOCATION(FI) \ |
201 | (frameless_look_for_prologue(FI)) | |
c906108c SS |
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 | ||
392a587b | 212 | #define FRAME_NUM_ARGS(fi) (-1) |
c906108c SS |
213 | |
214 | /* Return number of bytes at start of arglist that are not really args. */ | |
215 | ||
216 | #define FRAME_ARGS_SKIP 0 | |
217 | ||
392a587b | 218 | extern void sh_frame_find_saved_regs PARAMS ((struct frame_info *fi, |
c906108c SS |
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 | ||
c906108c SS |
230 | typedef unsigned short INSN_WORD; |
231 | ||
392a587b JM |
232 | extern CORE_ADDR sh_push_arguments PARAMS ((int nargs, |
233 | struct value **args, | |
c906108c SS |
234 | CORE_ADDR sp, |
235 | unsigned char struct_return, | |
236 | CORE_ADDR struct_addr)); | |
237 | ||
7a292a7a | 238 | #define USE_GENERIC_DUMMY_FRAMES 1 |
c906108c SS |
239 | #define CALL_DUMMY {0} |
240 | #define CALL_DUMMY_LENGTH (0) | |
241 | #define CALL_DUMMY_START_OFFSET (0) | |
242 | #define CALL_DUMMY_BREAKPOINT_OFFSET (0) | |
392a587b | 243 | #define FIX_CALL_DUMMY(DUMMY, STARTADDR, FUNADDR, NARGS, ARGS, TYPE, GCCP) |
c906108c SS |
244 | #define CALL_DUMMY_LOCATION AT_ENTRY_POINT |
245 | #define CALL_DUMMY_ADDRESS() entry_point_address () | |
246 | extern CORE_ADDR sh_push_return_address PARAMS ((CORE_ADDR, CORE_ADDR)); | |
247 | #define PUSH_RETURN_ADDRESS(PC, SP) sh_push_return_address (PC, SP) | |
248 | ||
249 | ||
250 | extern CORE_ADDR sh_frame_chain PARAMS ((struct frame_info *)); | |
251 | #define FRAME_CHAIN(FRAME) sh_frame_chain(FRAME) | |
252 | #define PUSH_DUMMY_FRAME generic_push_dummy_frame () | |
253 | #define FRAME_CHAIN_VALID(FP, FRAME) generic_frame_chain_valid (FP, FRAME) | |
7a292a7a | 254 | #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP) |
c906108c | 255 | #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \ |
392a587b | 256 | (sh_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR)) |
c906108c | 257 | |
392a587b | 258 | /* override the standard get_saved_register function with |
c906108c | 259 | one that takes account of generic CALL_DUMMY frames */ |
7a292a7a SS |
260 | #define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \ |
261 | generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval) | |
c906108c SS |
262 | |
263 | /* Discard from the stack the innermost frame, restoring all saved | |
264 | registers. */ | |
265 | ||
266 | extern void sh_pop_frame PARAMS ((void)); | |
267 | #define POP_FRAME sh_pop_frame(); | |
268 | ||
269 | #define NOP {0x20, 0x0b} | |
270 | ||
271 | #define REGISTER_SIZE 4 | |
272 | ||
273 | #define COERCE_FLOAT_TO_DOUBLE 1 | |
274 | ||
275 | #define BELIEVE_PCC_PROMOTION 1 | |
276 | ||
277 | /* Need this for WinGDB. See gdb/mswin/{regdoc.h, gdbwin.c, gui.cpp}. */ | |
278 | #define TARGET_SH |