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[/] [or1k/] [trunk/] [gdb-5.0/] [gdb/] [config/] [d30v/] [tm-d30v.h] - Blame information for rev 1765

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1 106 markom
/* Target-specific definition for the Mitsubishi D30V
2
   Copyright (C) 1997 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
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   it under the terms of the GNU General Public License as published by
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   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
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   GNU General Public License for more details.
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16
   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
18
   Foundation, Inc., 59 Temple Place - Suite 330,
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   Boston, MA 02111-1307, USA.  */
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21
#ifndef TM_D30V_H
22
#define TM_D30V_H
23
 
24
/* Define the bit, byte, and word ordering of the machine.  */
25
 
26
#define TARGET_BYTE_ORDER       BIG_ENDIAN
27
 
28
/* Offset from address of function to start of its code.
29
   Zero on most machines.  */
30
 
31
#define FUNCTION_START_OFFSET 0
32
 
33
/* these are the addresses the D30V-EVA board maps data */
34
/* and instruction memory to. */
35
 
36
#define DMEM_START      0x20000000
37
#define IMEM_START      0x00000000      /* was 0x10000000 */
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#define STACK_START     0x20007ffe
39
 
40
/* Forward decls for prototypes */
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struct frame_info;
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struct frame_saved_regs;
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struct type;
44
struct value;
45
 
46
/* Advance PC across any function entry prologue instructions
47
   to reach some "real" code.  */
48
 
49
extern CORE_ADDR d30v_skip_prologue PARAMS ((CORE_ADDR));
50
#define SKIP_PROLOGUE(ip) (d30v_skip_prologue (ip))
51
 
52
 
53
/* Stack grows downward.  */
54
#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
55
 
56
/* for a breakpoint, use "dbt || nop" */
57
#define BREAKPOINT {0x00, 0xb0, 0x00, 0x00,\
58
                    0x00, 0xf0, 0x00, 0x00}
59
 
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 0
63
 
64
#define REGISTER_NAMES \
65
{   "r0",  "r1",  "r2",  "r3",  "r4",  "r5",  "r6",  "r7",      \
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    "r8",  "r9",  "r10", "r11", "r12", "r13", "r14", "r15",     \
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    "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",     \
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    "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",     \
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    "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39",     \
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    "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47",     \
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    "r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55",     \
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    "r56", "r57", "r58", "r59", "r60", "r61", "r62", "r63",     \
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    "spi", "spu", \
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    "psw", "bpsw", "pc", "bpc", "dpsw", "dpc", "cr6", "rpt_c",  \
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    "rpt_s", "rpt_e", "mod_s", "mod_e", "cr12", "cr13", "iba", "eit_vb",\
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    "int_s", "int_m", "a0", "a1" \
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    }
78
 
79
#define NUM_REGS 86
80
 
81
/* Register numbers of various important registers.
82
   Note that some of these values are "real" register numbers,
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   and correspond to the general registers of the machine,
84
   and some are "phony" register numbers which are too large
85
   to be actual register numbers as far as the user is concerned
86
   but do serve to get the desired values when passed to read_register.  */
87
 
88
#define R0_REGNUM       0
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#define FP_REGNUM       61
90
#define LR_REGNUM       62
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#define SP_REGNUM       63
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#define SPI_REGNUM      64      /* Interrupt stack pointer */
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#define SPU_REGNUM      65      /* User stack pointer */
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#define CREGS_START     66
95
 
96
#define PSW_REGNUM      (CREGS_START + 0)       /* psw, bpsw, or dpsw??? */
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#define     PSW_SM (((unsigned long)0x80000000) >> 0)   /* Stack mode: 0/SPI */
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                                                        /*             1/SPU */
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#define     PSW_EA (((unsigned long)0x80000000) >> 2)   /* Execution status */
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#define     PSW_DB (((unsigned long)0x80000000) >> 3)   /* Debug mode */
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#define     PSW_DS (((unsigned long)0x80000000) >> 4)   /* Debug EIT status */
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#define     PSW_IE (((unsigned long)0x80000000) >> 5)   /* Interrupt enable */
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#define     PSW_RP (((unsigned long)0x80000000) >> 6)   /* Repeat enable */
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#define     PSW_MD (((unsigned long)0x80000000) >> 7)   /* Modulo enable */
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#define     PSW_F0 (((unsigned long)0x80000000) >> 17)  /* F0 flag */
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#define     PSW_F1 (((unsigned long)0x80000000) >> 19)  /* F1 flag */
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#define     PSW_F2 (((unsigned long)0x80000000) >> 21)  /* F2 flag */
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#define     PSW_F3 (((unsigned long)0x80000000) >> 23)  /* F3 flag */
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#define     PSW_S  (((unsigned long)0x80000000) >> 25)  /* Saturation flag */
110
#define     PSW_V  (((unsigned long)0x80000000) >> 27)  /* Overflow flag */
111
#define     PSW_VA (((unsigned long)0x80000000) >> 29)  /* Accum. overflow */
112
#define     PSW_C  (((unsigned long)0x80000000) >> 31)  /* Carry/Borrow flag */
113
 
114
#define BPSW_REGNUM     (CREGS_START + 1)       /* Backup PSW (on interrupt) */
115
#define PC_REGNUM       (CREGS_START + 2)       /* pc, bpc, or dpc??? */
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#define BPC_REGNUM      (CREGS_START + 3)       /* Backup PC (on interrupt) */
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#define DPSW_REGNUM     (CREGS_START + 4)       /* Backup PSW (on debug trap) */
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#define DPC_REGNUM      (CREGS_START + 5)       /* Backup PC (on debug trap) */
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#define RPT_C_REGNUM    (CREGS_START + 7)       /* Loop count */
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#define RPT_S_REGNUM    (CREGS_START + 8)       /* Loop start address */
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#define RPT_E_REGNUM    (CREGS_START + 9)       /* Loop end address */
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#define MOD_S_REGNUM    (CREGS_START + 10)
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#define MOD_E_REGNUM    (CREGS_START + 11)
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#define IBA_REGNUM      (CREGS_START + 14)      /* Instruction break address */
125
#define EIT_VB_REGNUM   (CREGS_START + 15)      /* Vector base address */
126
#define INT_S_REGNUM    (CREGS_START + 16)      /* Interrupt status */
127
#define INT_M_REGNUM    (CREGS_START + 17)      /* Interrupt mask */
128
#define A0_REGNUM       84
129
#define A1_REGNUM       85
130
 
131
/* Say how much memory is needed to store a copy of the register set */
132
#define REGISTER_BYTES    ((NUM_REGS - 2) * 4 + 2 * 8)
133
 
134
/* Index within `registers' of the first byte of the space for
135
   register N.  */
136
 
137
#define REGISTER_BYTE(N)  \
138
( ((N) >= A0_REGNUM) ? ( ((N) - A0_REGNUM) * 8 + A0_REGNUM * 4 ) : ((N) * 4) )
139
 
140
/* Number of bytes of storage in the actual machine representation
141
   for register N.  */
142
 
143
#define REGISTER_RAW_SIZE(N) ( ((N) >= A0_REGNUM) ? 8 : 4 )
144
 
145
/* Number of bytes of storage in the program's representation
146
   for register N.  */
147
#define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N)
148
 
149
/* Largest value REGISTER_RAW_SIZE can have.  */
150
 
151
#define MAX_REGISTER_RAW_SIZE 8
152
 
153
/* Largest value REGISTER_VIRTUAL_SIZE can have.  */
154
 
155
#define MAX_REGISTER_VIRTUAL_SIZE 8
156
 
157
/* Return the GDB type object for the "standard" data type
158
   of data in register N.  */
159
 
160
#define REGISTER_VIRTUAL_TYPE(N) \
161
( ((N) < A0_REGNUM ) ? builtin_type_long : builtin_type_long_long)
162
 
163
/* Writing to r0 is a noop (not an error or exception or anything like
164
   that, however).  */
165
 
166
#define CANNOT_STORE_REGISTER(regno) ((regno) == R0_REGNUM)
167
 
168
void d30v_do_registers_info PARAMS ((int regnum, int fpregs));
169
 
170
#define DO_REGISTERS_INFO d30v_do_registers_info
171
 
172
/* Store the address of the place in which to copy the structure the
173
   subroutine will return.  This is called from call_function.
174
 
175
   We store structs through a pointer passed in R2 */
176
 
177
#define STORE_STRUCT_RETURN(ADDR, SP) \
178
    { write_register (2, (ADDR));  }
179
 
180
 
181
/* Write into appropriate registers a function return value
182
   of type TYPE, given in virtual format.
183
 
184
   Things always get returned in R2/R3 */
185
 
186
#define STORE_RETURN_VALUE(TYPE,VALBUF) \
187
  write_register_bytes (REGISTER_BYTE(2), VALBUF, TYPE_LENGTH (TYPE))
188
 
189
 
190
/* Extract from an array REGBUF containing the (raw) register state
191
   the address in which a function should return its structure value,
192
   as a CORE_ADDR (or an expression that can be used as one).  */
193
#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (((CORE_ADDR *)(REGBUF))[2])
194
 
195
 
196
/* Define other aspects of the stack frame.
197
   we keep a copy of the worked out return pc lying around, since it
198
   is a useful bit of info */
199
 
200
#define EXTRA_FRAME_INFO \
201
    CORE_ADDR return_pc; \
202
    CORE_ADDR dummy; \
203
    int frameless; \
204
    int size;
205
 
206
#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
207
    d30v_init_extra_frame_info(fromleaf, fi)
208
 
209
extern void d30v_init_extra_frame_info PARAMS ((int fromleaf, struct frame_info * fi));
210
 
211
/* A macro that tells us whether the function invocation represented
212
   by FI does not have a frame on the stack associated with it.  If it
213
   does not, FRAMELESS is set to 1, else 0.  */
214
 
215
#define FRAMELESS_FUNCTION_INVOCATION(FI) \
216
  (frameless_look_for_prologue (FI))
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218
CORE_ADDR d30v_frame_chain (struct frame_info *frame);
219
#define FRAME_CHAIN(FRAME)       d30v_frame_chain(FRAME)
220
extern int d30v_frame_chain_valid PARAMS ((CORE_ADDR, struct frame_info *));
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#define FRAME_CHAIN_VALID(chain, thisframe) d30v_frame_chain_valid (chain, thisframe)
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#define FRAME_SAVED_PC(FRAME)    ((FRAME)->return_pc)
223
#define FRAME_ARGS_ADDRESS(fi)   (fi)->frame
224
#define FRAME_LOCALS_ADDRESS(fi) (fi)->frame
225
 
226
void d30v_init_frame_pc (int fromleaf, struct frame_info *prev);
227
#define INIT_FRAME_PC_FIRST(fromleaf, prev)     d30v_init_frame_pc(fromleaf, prev)
228
#define INIT_FRAME_PC(fromleaf, prev)   /* nada */
229
 
230
/* Immediately after a function call, return the saved pc.  We can't */
231
/* use frame->return_pc beause that is determined by reading R62 off the */
232
/* stack and that may not be written yet. */
233
 
234
#define SAVED_PC_AFTER_CALL(frame) (read_register(LR_REGNUM))
235
 
236
/* Set VAL to the number of args passed to frame described by FI.
237
   Can set VAL to -1, meaning no way to tell.  */
238
/* We can't tell how many args there are */
239
 
240
#define FRAME_NUM_ARGS(fi) (-1)
241
 
242
/* Return number of bytes at start of arglist that are not really args.  */
243
 
244
#define FRAME_ARGS_SKIP 0
245
 
246
 
247
/* Put here the code to store, into a struct frame_saved_regs,
248
   the addresses of the saved registers of frame described by FRAME_INFO.
249
   This includes special registers such as pc and fp saved in special
250
   ways in the stack frame.  sp is even more special:
251
   the address we return for it IS the sp for the next frame.  */
252
 
253
#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)         \
254
   d30v_frame_find_saved_regs(frame_info, &(frame_saved_regs))
255
 
256
extern void d30v_frame_find_saved_regs PARAMS ((struct frame_info *, struct frame_saved_regs *));
257
 
258
/* DUMMY FRAMES.  Need these to support inferior function calls.
259
   They work like this on D30V:
260
   First we set a breakpoint at 0 or __start.
261
   Then we push all the registers onto the stack.
262
   Then put the function arguments in the proper registers and set r13
263
   to our breakpoint address.
264
   Finally call the function directly.
265
   When it hits the breakpoint, clear the break point and pop the old
266
   register contents off the stack. */
267
 
268
#define CALL_DUMMY              { 0 }
269
#define PUSH_DUMMY_FRAME
270
#define CALL_DUMMY_START_OFFSET 0
271
#define CALL_DUMMY_LOCATION     AT_ENTRY_POINT
272
#define CALL_DUMMY_BREAKPOINT_OFFSET (0)
273
 
274
extern CORE_ADDR d30v_call_dummy_address PARAMS ((void));
275
#define CALL_DUMMY_ADDRESS() d30v_call_dummy_address()
276
 
277
#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
278
sp = d30v_fix_call_dummy (dummyname, pc, fun, nargs, args, type, gcc_p)
279
 
280
#define PC_IN_CALL_DUMMY(pc, sp, frame_address) ( pc == IMEM_START + 4 )
281
 
282
extern CORE_ADDR d30v_fix_call_dummy PARAMS ((char *, CORE_ADDR, CORE_ADDR,
283
                                              int, struct value **,
284
                                              struct type *, int));
285
#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
286
  (d30v_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr)))
287
extern CORE_ADDR d30v_push_arguments PARAMS ((int, struct value **, CORE_ADDR, int, CORE_ADDR));
288
 
289
 
290
/* Extract from an array REGBUF containing the (raw) register state
291
   a function return value of type TYPE, and copy that, in virtual format,
292
   into VALBUF.  */
293
 
294
#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
295
d30v_extract_return_value(TYPE, REGBUF, VALBUF)
296
extern void
297
d30v_extract_return_value PARAMS ((struct type *, char *, char *));
298
 
299
 
300
/* Discard from the stack the innermost frame,
301
   restoring all saved registers.  */
302
#define POP_FRAME d30v_pop_frame();
303
extern void d30v_pop_frame PARAMS ((void));
304
 
305
#define REGISTER_SIZE 4
306
 
307
/* Need to handle SP special, as we need to select between spu and spi.  */
308
#if 0                           /* XXX until the simulator is fixed */
309
#define TARGET_READ_SP() ((read_register (PSW_REGNUM) & PSW_SM) \
310
                          ? read_register (SPU_REGNUM) \
311
                          : read_register (SPI_REGNUM))
312
 
313
#define TARGET_WRITE_SP(val) ((read_register (PSW_REGNUM) & PSW_SM) \
314
                          ? write_register (SPU_REGNUM, (val)) \
315
                          : write_register (SPI_REGNUM, (val)))
316
#endif
317
 
318
#define STACK_ALIGN(len)        (((len) + 7 ) & ~7)
319
 
320
/* Turn this on to cause remote-sim.c to use sim_set/clear_breakpoint. */
321
 
322
#define SIM_HAS_BREAKPOINTS
323
 
324
#endif /* TM_D30V_H */

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