1 /* Target-specific definition for a Hitachi Super-H.
2 Copyright (C) 1993 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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. */
21 /* Contributed by Steve Chamberlain sac@cygnus.com */
24 struct frame_saved_regs
;
28 #define GDB_TARGET_IS_SH
30 #define IEEE_FLOAT (1)
32 /* Define the bit, byte, and word ordering of the machine. */
34 #define TARGET_BYTE_ORDER_SELECTABLE
37 /* Offset from address of function to start of its code.
38 Zero on most machines. */
40 #define FUNCTION_START_OFFSET 0
42 /* Advance PC across any function entry prologue instructions
43 to reach some "real" code. */
45 extern CORE_ADDR
sh_skip_prologue (CORE_ADDR
);
46 #define SKIP_PROLOGUE(ip) (sh_skip_prologue (ip))
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
53 The return address is the value saved in the PR register + 4 */
55 #define SAVED_PC_AFTER_CALL(frame) (ADDR_BITS_REMOVE(read_register(PR_REGNUM)))
57 /* Stack grows downward. */
59 #define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
61 /* Illegal instruction - used by the simulator for breakpoint
64 #define BREAKPOINT {0xc3, 0xc3} /* 0xc3c3 is trapa #c3, and it works in big
65 and little endian modes */
67 #define BIG_REMOTE_BREAKPOINT { 0xc3, 0x20 }
68 #define LITTLE_REMOTE_BREAKPOINT { 0x20, 0xc3 }
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
74 /* Say how long registers are. */
75 #define REGISTER_TYPE long
77 /* Say how much memory is needed to store a copy of the register set */
78 #define REGISTER_BYTES (NUM_REGS*4)
80 /* Index within `registers' of the first byte of the space for
83 #define REGISTER_BYTE(N) ((N)*4)
85 /* Number of bytes of storage in the actual machine representation
88 #define REGISTER_RAW_SIZE(N) 4
90 #define REGISTER_VIRTUAL_SIZE(N) 4
92 /* Largest value REGISTER_RAW_SIZE can have. */
94 #define MAX_REGISTER_RAW_SIZE 4
96 /* Largest value REGISTER_VIRTUAL_SIZE can have. */
98 #define MAX_REGISTER_VIRTUAL_SIZE 4
100 /* Return the GDB type object for the "standard" data type
101 of data in register N. */
103 #define REGISTER_VIRTUAL_TYPE(N) \
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) \
108 ? builtin_type_float : builtin_type_int)
110 /* Initializer for an array of names of registers.
111 Entries beyond the first NUM_REGS are ignored. */
113 extern char **sh_register_names
;
114 #define REGISTER_NAME(i) sh_register_names[i]
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. */
126 #define STRUCT_RETURN_REGNUM 2
127 #define ARG0_REGNUM 4
128 #define ARGLAST_REGNUM 7
133 #define GBR_REGNUM 18
134 #define VBR_REGNUM 19
135 #define MACH_REGNUM 20
136 #define MACL_REGNUM 21
138 #define FPUL_REGNUM 23
139 #define FPSCR_REGNUM 24
140 #define DSR_REGNUM 24
141 #define FP0_REGNUM 25
142 #define FP15_REGNUM 40
143 #define A0G_REGNUM 25
145 #define A1G_REGNUM 27
153 #define MOD_REGNUM 40
154 #define SSR_REGNUM 41
155 #define SPC_REGNUM 42
156 #define R0B0_REGNUM 43
157 #define R0B1_REGNUM 51
160 #define R0B_REGNUM 51
162 #define NUM_REALREGS 59
164 /* Store the address of the place in which to copy the structure the
165 subroutine will return. This is called from call_function.
167 We store structs through a pointer passed in R0 */
169 #define STORE_STRUCT_RETURN(ADDR, SP) \
170 { write_register (STRUCT_RETURN_REGNUM, (ADDR)); }
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)
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,
179 extern void sh_extract_return_value (struct type
*, void *, void *);
180 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
181 sh_extract_return_value (TYPE, REGBUF, VALBUF)
183 /* Write into appropriate registers a function return value
184 of type TYPE, given in virtual format.
186 Things always get returned in R0/R1 */
188 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
189 write_register_bytes (REGISTER_BYTE(0), VALBUF, TYPE_LENGTH (TYPE))
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). */
195 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
196 extract_address (REGBUF, REGISTER_RAW_SIZE (0))
199 /* Define other aspects of the stack frame.
200 we keep a copy of the worked out return pc lying around, since it
201 is a useful bit of info */
203 #define EXTRA_FRAME_INFO \
204 CORE_ADDR return_pc; \
208 #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
209 sh_init_extra_frame_info(fromleaf, fi)
210 extern void sh_init_extra_frame_info (int, struct frame_info
*);
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. */
216 #define FRAMELESS_FUNCTION_INVOCATION(FI) \
217 (frameless_look_for_prologue(FI))
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)
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. */
226 /* We can't tell how many args there are */
228 #define FRAME_NUM_ARGS(fi) (-1)
230 /* Return number of bytes at start of arglist that are not really args. */
232 #define FRAME_ARGS_SKIP 0
234 extern void sh_frame_find_saved_regs (struct frame_info
*fi
,
235 struct frame_saved_regs
*fsr
);
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. */
243 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
244 sh_frame_find_saved_regs(frame_info, &(frame_saved_regs))
246 typedef unsigned short INSN_WORD
;
248 extern CORE_ADDR
sh_push_arguments (int nargs
,
251 unsigned char struct_return
,
252 CORE_ADDR struct_addr
);
254 #define USE_GENERIC_DUMMY_FRAMES 1
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)
259 #define FIX_CALL_DUMMY(DUMMY, STARTADDR, FUNADDR, NARGS, ARGS, TYPE, GCCP)
260 #define CALL_DUMMY_LOCATION AT_ENTRY_POINT
261 #define CALL_DUMMY_ADDRESS() entry_point_address ()
262 extern CORE_ADDR
sh_push_return_address (CORE_ADDR
, CORE_ADDR
);
263 #define PUSH_RETURN_ADDRESS(PC, SP) sh_push_return_address (PC, SP)
266 extern CORE_ADDR
sh_frame_chain (struct frame_info
*);
267 #define FRAME_CHAIN(FRAME) sh_frame_chain(FRAME)
268 #define PUSH_DUMMY_FRAME generic_push_dummy_frame ()
269 #define FRAME_CHAIN_VALID(FP, FRAME) generic_file_frame_chain_valid (FP, FRAME)
270 #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP)
271 #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
272 (sh_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR))
274 /* override the standard get_saved_register function with
275 one that takes account of generic CALL_DUMMY frames */
276 #define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \
277 generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
279 /* Discard from the stack the innermost frame, restoring all saved
282 extern void sh_pop_frame (void);
283 #define POP_FRAME sh_pop_frame();
285 #define NOP {0x20, 0x0b}
287 #define REGISTER_SIZE 4
289 #define COERCE_FLOAT_TO_DOUBLE(formal, actual) (1)
291 #define BELIEVE_PCC_PROMOTION 1
293 /* Need this for WinGDB. See gdb/mswin/{regdoc.h, gdbwin.c, gui.cpp}. */