1 /* Target-specific definition for the Mitsubishi D10V
2 Copyright (C) 1996 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, Boston, MA 02111-1307, USA. */
20 /* Contributed by Martin Hunt, hunt@cygnus.com */
22 /* #define GDB_TARGET_IS_D10V - moved to gdbarch.h */
24 /* Define the bit, byte, and word ordering of the machine. */
26 #define TARGET_BYTE_ORDER BIG_ENDIAN
28 /* Offset from address of function to start of its code.
29 Zero on most machines. */
31 #define FUNCTION_START_OFFSET 0
33 /* these are the addresses the D10V-EVA board maps data */
34 /* and instruction memory to. */
36 #define DMEM_START 0x0000000
37 #define IMEM_START 0x1000000
38 #define STACK_START 0x0007ffe
40 #ifdef __STDC__ /* Forward decls for prototypes */
42 struct frame_saved_regs
;
47 /* Advance PC across any function entry prologue instructions
48 to reach some "real" code. */
50 extern CORE_ADDR
d10v_skip_prologue ();
51 #define SKIP_PROLOGUE(ip) (d10v_skip_prologue (ip))
54 /* Stack grows downward. */
55 #define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
57 /* for a breakpoint, use "dbt || nop" */
58 #define BREAKPOINT {0x2f, 0x90, 0x5e, 0x00}
60 /* If your kernel resets the pc after the trap happens you may need to
61 define this before including this file. */
62 #define DECR_PC_AFTER_BREAK 4
64 #define REGISTER_NAMES \
65 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
66 "r8", "r9", "r10","r11","r12", "r13", "r14","r15",\
67 "psw","bpsw","pc","bpc", "cr4", "cr5", "cr6", "rpt_c",\
68 "rpt_s","rpt_e", "mod_s", "mod_e", "cr12", "cr13", "iba", "cr15",\
69 "imap0","imap1","dmap","a0", "a1"\
74 /* Register numbers of various important registers.
75 Note that some of these values are "real" register numbers,
76 and correspond to the general registers of the machine,
77 and some are "phony" register numbers which are too large
78 to be actual register numbers as far as the user is concerned
79 but do serve to get the desired values when passed to read_register. */
87 #define IMAP0_REGNUM 32
88 #define IMAP1_REGNUM 33
89 #define DMAP_REGNUM 34
92 /* Say how much memory is needed to store a copy of the register set */
93 #define REGISTER_BYTES ((NUM_REGS-2)*2+16)
95 /* Index within `registers' of the first byte of the space for
98 #define REGISTER_BYTE(N) \
99 ( ((N) > A0_REGNUM) ? ( ((N)-A0_REGNUM)*8 + A0_REGNUM*2 ) : ((N) * 2) )
101 /* Number of bytes of storage in the actual machine representation
104 #define REGISTER_RAW_SIZE(N) ( ((N) >= A0_REGNUM) ? 8 : 2 )
106 /* Number of bytes of storage in the program's representation
108 #define REGISTER_VIRTUAL_SIZE(N) ( ((N) >= A0_REGNUM) ? 8 : ( ((N) == PC_REGNUM || (N) == SP_REGNUM) ? 4 : 2 ))
110 /* Largest value REGISTER_RAW_SIZE can have. */
112 #define MAX_REGISTER_RAW_SIZE 8
114 /* Largest value REGISTER_VIRTUAL_SIZE can have. */
116 #define MAX_REGISTER_VIRTUAL_SIZE 8
118 /* Return the GDB type object for the "standard" data type
119 of data in register N. */
121 #define REGISTER_VIRTUAL_TYPE(N) \
122 ( ((N) < A0_REGNUM ) ? ((N) == PC_REGNUM || (N) == SP_REGNUM ? builtin_type_long : builtin_type_short) : builtin_type_long_long)
125 /* convert $pc and $sp to/from virtual addresses */
126 #define REGISTER_CONVERTIBLE(N) ((N) == PC_REGNUM || (N) == SP_REGNUM)
127 #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
129 ULONGEST x = extract_unsigned_integer ((FROM), REGISTER_RAW_SIZE (REGNUM)); \
130 if (REGNUM == PC_REGNUM) x = (x << 2) | IMEM_START; \
131 else x |= DMEM_START; \
132 store_unsigned_integer ((TO), TYPE_LENGTH(TYPE), x); \
134 #define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
136 ULONGEST x = extract_unsigned_integer ((FROM), TYPE_LENGTH(TYPE)); \
138 if (REGNUM == PC_REGNUM) x >>= 2; \
139 store_unsigned_integer ((TO), 2, x); \
142 #define D10V_MAKE_DADDR(x) ((x) | DMEM_START)
143 #define D10V_MAKE_IADDR(x) (((x) << 2) | IMEM_START)
145 #define D10V_DADDR_P(X) (((X) & 0x3000000) == DMEM_START)
146 #define D10V_IADDR_P(X) (((X) & 0x3000000) == IMEM_START)
148 #define D10V_CONVERT_IADDR_TO_RAW(X) (((X) >> 2) & 0xffff)
149 #define D10V_CONVERT_DADDR_TO_RAW(X) ((X) & 0xffff)
151 #define ARG1_REGNUM R0_REGNUM
152 #define ARGN_REGNUM 3
153 #define RET1_REGNUM R0_REGNUM
155 /* Store the address of the place in which to copy the structure the
156 subroutine will return. This is called from call_function.
158 We store structs through a pointer passed in the first Argument
161 #define STORE_STRUCT_RETURN(ADDR, SP) \
162 { write_register (ARG1_REGNUM, (ADDR)); }
165 /* Write into appropriate registers a function return value
166 of type TYPE, given in virtual format.
168 Things always get returned in RET1_REGNUM, RET2_REGNUM, ... */
170 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
171 write_register_bytes (REGISTER_BYTE(RET1_REGNUM), VALBUF, TYPE_LENGTH (TYPE))
174 /* Extract from an array REGBUF containing the (raw) register state
175 the address in which a function should return its structure value,
176 as a CORE_ADDR (or an expression that can be used as one). */
178 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
179 (extract_address ((REGBUF) + REGISTER_BYTE (ARG1_REGNUM), REGISTER_RAW_SIZE (ARG1_REGNUM)) | DMEM_START)
181 /* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of
182 EXTRACT_RETURN_VALUE? GCC_P is true if compiled with gcc
183 and TYPE is the type (which is known to be struct, union or array).
185 The d10v returns anything less than 8 bytes in size in
188 extern use_struct_convention_fn d10v_use_struct_convention
;
189 #define USE_STRUCT_CONVENTION(gcc_p, type) d10v_use_struct_convention (gcc_p, type)
193 /* Define other aspects of the stack frame.
194 we keep a copy of the worked out return pc lying around, since it
195 is a useful bit of info */
197 #define EXTRA_FRAME_INFO \
198 CORE_ADDR return_pc; \
202 #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
203 d10v_init_extra_frame_info(fromleaf, fi)
205 extern void d10v_init_extra_frame_info
PARAMS (( int fromleaf
, struct frame_info
*fi
));
207 /* A macro that tells us whether the function invocation represented
208 by FI does not have a frame on the stack associated with it. If it
209 does not, FRAMELESS is set to 1, else 0. */
211 #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
212 (FRAMELESS) = frameless_look_for_prologue(FI)
214 #define FRAME_CHAIN(FRAME) d10v_frame_chain(FRAME)
215 extern int d10v_frame_chain_valid
PARAMS ((CORE_ADDR
, struct frame_info
*));
216 #define FRAME_CHAIN_VALID(chain, thisframe) d10v_frame_chain_valid (chain, thisframe)
217 #define FRAME_SAVED_PC(FRAME) ((FRAME)->return_pc)
218 #define FRAME_ARGS_ADDRESS(fi) (fi)->frame
219 #define FRAME_LOCALS_ADDRESS(fi) (fi)->frame
221 /* Immediately after a function call, return the saved pc. We can't */
222 /* use frame->return_pc beause that is determined by reading R13 off the */
223 /*stack and that may not be written yet. */
225 #define SAVED_PC_AFTER_CALL(frame) ((read_register(LR_REGNUM) << 2) | IMEM_START)
227 /* Set VAL to the number of args passed to frame described by FI.
228 Can set VAL to -1, meaning no way to tell. */
229 /* We can't tell how many args there are */
231 #define FRAME_NUM_ARGS(val,fi) (val = -1)
233 /* Return number of bytes at start of arglist that are not really args. */
235 #define FRAME_ARGS_SKIP 0
238 /* Put here the code to store, into a struct frame_saved_regs,
239 the addresses of the saved registers of frame described by FRAME_INFO.
240 This includes special registers such as pc and fp saved in special
241 ways in the stack frame. sp is even more special:
242 the address we return for it IS the sp for the next frame. */
244 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
245 d10v_frame_find_saved_regs(frame_info, &(frame_saved_regs))
247 extern void d10v_frame_find_saved_regs
PARAMS ((struct frame_info
*, struct frame_saved_regs
*));
249 #define NAMES_HAVE_UNDERSCORE
252 /* DUMMY FRAMES. Need these to support inferior function calls. They
253 work like this on D10V: First we set a breakpoint at 0 or __start.
254 Then we push all the registers onto the stack. Then put the
255 function arguments in the proper registers and set r13 to our
256 breakpoint address. Finally, the PC is set to the start of the
257 function being called (no JSR/BSR insn). When it hits the
258 breakpoint, clear the break point and pop the old register contents
261 extern void d10v_pop_frame
PARAMS ((struct frame_info
*frame
));
262 #define POP_FRAME generic_pop_current_frame (d10v_pop_frame)
264 #define USE_GENERIC_DUMMY_FRAMES 1
265 #define CALL_DUMMY {0}
266 #define CALL_DUMMY_START_OFFSET (0)
267 #define CALL_DUMMY_BREAKPOINT_OFFSET (0)
268 #define CALL_DUMMY_LOCATION AT_ENTRY_POINT
269 #define FIX_CALL_DUMMY(DUMMY, START, FUNADDR, NARGS, ARGS, TYPE, GCCP)
270 #define CALL_DUMMY_ADDRESS() entry_point_address ()
271 extern CORE_ADDR d10v_push_return_address
PARAMS ((CORE_ADDR pc
, CORE_ADDR sp
));
272 #define PUSH_RETURN_ADDRESS(PC, SP) d10v_push_return_address (PC, SP)
274 #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP)
275 /* #define PC_IN_CALL_DUMMY(pc, sp, frame_address) ( pc == IMEM_START + 4 ) */
277 #define PUSH_DUMMY_FRAME generic_push_dummy_frame ()
279 /* override the default get_saved_register function with one that
280 takes account of generic CALL_DUMMY frames */
281 #define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \
282 generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
284 #define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
285 sp = d10v_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr))
286 extern CORE_ADDR d10v_push_arguments
PARAMS ((int, struct value
**, CORE_ADDR
, int, CORE_ADDR
));
289 /* Extract from an array REGBUF containing the (raw) register state
290 a function return value of type TYPE, and copy that, in virtual format,
293 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
294 d10v_extract_return_value(TYPE, REGBUF, VALBUF)
296 d10v_extract_return_value
PARAMS ((struct type
*, char *, char *));
299 #define REGISTER_SIZE 2
301 #ifdef CC_HAS_LONG_LONG
302 # define LONGEST long long
304 # define LONGEST long
306 #define ULONGEST unsigned LONGEST
308 void d10v_write_pc
PARAMS ((CORE_ADDR val
, int pid
));
309 CORE_ADDR d10v_read_pc
PARAMS ((int pid
));
310 void d10v_write_sp
PARAMS ((CORE_ADDR val
));
311 CORE_ADDR d10v_read_sp
PARAMS ((void));
312 void d10v_write_fp
PARAMS ((CORE_ADDR val
));
313 CORE_ADDR d10v_read_fp
PARAMS ((void));
315 #define TARGET_READ_PC(pid) d10v_read_pc (pid)
316 #define TARGET_WRITE_PC(val,pid) d10v_write_pc (val, pid)
317 #define TARGET_READ_FP() d10v_read_fp ()
318 #define TARGET_WRITE_FP(val) d10v_write_fp (val)
319 #define TARGET_READ_SP() d10v_read_sp ()
320 #define TARGET_WRITE_SP(val) d10v_write_sp (val)
322 /* Number of bits in the appropriate type */
323 #define TARGET_INT_BIT (2 * TARGET_CHAR_BIT)
324 #define TARGET_PTR_BIT (4 * TARGET_CHAR_BIT)
325 #define TARGET_DOUBLE_BIT (4 * TARGET_CHAR_BIT)
326 #define TARGET_LONG_DOUBLE_BIT (8 * TARGET_CHAR_BIT)
329 /* For the d10v when talking to the remote d10v board, GDB addresses
330 need to be translated into a format that the d10v rom monitor
333 int remote_d10v_translate_xfer_address
PARAMS ((CORE_ADDR gdb_addr
, int gdb_len
, CORE_ADDR
*rem_addr
));
334 #define REMOTE_TRANSLATE_XFER_ADDRESS(GDB_ADDR, GDB_LEN, REM_ADDR, REM_LEN) \
335 (REM_LEN) = remote_d10v_translate_xfer_address ((GDB_ADDR), (GDB_LEN), &(REM_ADDR))