1 /* Parameters for target machine AMD 29000, for GDB, the GNU debugger.
2 Copyright 1990, 1991, 1993, 1994 Free Software Foundation, Inc.
3 Contributed by Cygnus Support. Written by Jim Kingdon.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 /* Parameters for an EB29K (a board which plugs into a PC and is
22 accessed through EBMON software running on the PC, which we
23 use as we'd use a remote stub (see remote-eb.c).
25 If gdb is ported to other a29k machines/systems, the
26 machine/system-specific parts should be removed from this file (a
29 /* Byte order is configurable, but this machine runs big-endian. */
30 #define TARGET_BYTE_ORDER BIG_ENDIAN
32 /* Floating point uses IEEE representations. */
35 /* Recognize our magic number. */
36 #define BADMAG(x) ((x).f_magic != 0572)
38 /* Offset from address of function to start of its code.
39 Zero on most machines. */
41 #define FUNCTION_START_OFFSET 0
43 /* Advance PC across any function entry prologue instructions
44 to reach some "real" code. */
46 #define SKIP_PROLOGUE(pc) (a29k_skip_prologue (pc))
47 CORE_ADDR
a29k_skip_prologue ();
49 /* Immediately after a function call, return the saved pc.
50 Can't go through the frames for this because on some machines
51 the new frame is not set up until the new function executes
54 #define SAVED_PC_AFTER_CALL(frame) ((frame->flags & TRANSPARENT_FRAME) \
55 ? read_register (TPC_REGNUM) \
56 : read_register (LR0_REGNUM))
58 /* Stack grows downward. */
60 #define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
62 /* Stack must be aligned on 32-bit boundaries when synthesizing
65 #define STACK_ALIGN(ADDR) (((ADDR) + 3) & ~3)
67 /* Sequence of bytes for breakpoint instruction. */
68 /* ASNEQ 0x50, gr1, gr1
69 The trap number 0x50 is chosen arbitrarily.
70 We let the command line (or previously included files) override this
73 #if TARGET_BYTE_ORDER == BIG_ENDIAN
74 #define BREAKPOINT {0x72, 0x50, 0x01, 0x01}
75 #else /* Target is little-endian. */
76 #define BREAKPOINT {0x01, 0x01, 0x50, 0x72}
77 #endif /* Target is little-endian. */
78 #endif /* BREAKPOINT */
80 /* Amount PC must be decremented by after a breakpoint.
81 This is often the number of bytes in BREAKPOINT
84 #define DECR_PC_AFTER_BREAK 0
86 /* Say how long (ordinary) registers are. This is a piece of bogosity
87 used in push_word and a few other places; REGISTER_RAW_SIZE is the
88 real way to know how big a register is. */
90 #define REGISTER_SIZE 4
92 /* Allow the register declarations here to be overridden for remote
94 #if !defined (REGISTER_NAMES)
96 /* Number of machine registers */
100 /* Initializer for an array of names of registers.
101 There should be NUM_REGS strings in this initializer.
103 FIXME, add floating point registers and support here.
105 Also note that this list does not attempt to deal with kernel
106 debugging (in which the first 32 registers are gr64-gr95). */
108 #define REGISTER_NAMES \
109 {"gr96", "gr97", "gr98", "gr99", "gr100", "gr101", "gr102", "gr103", "gr104", \
110 "gr105", "gr106", "gr107", "gr108", "gr109", "gr110", "gr111", "gr112", \
111 "gr113", "gr114", "gr115", "gr116", "gr117", "gr118", "gr119", "gr120", \
112 "gr121", "gr122", "gr123", "gr124", "gr125", "gr126", "gr127", \
113 "lr0", "lr1", "lr2", "lr3", "lr4", "lr5", "lr6", "lr7", "lr8", "lr9", \
114 "lr10", "lr11", "lr12", "lr13", "lr14", "lr15", "lr16", "lr17", "lr18", \
115 "lr19", "lr20", "lr21", "lr22", "lr23", "lr24", "lr25", "lr26", "lr27", \
116 "lr28", "lr29", "lr30", "lr31", "lr32", "lr33", "lr34", "lr35", "lr36", \
117 "lr37", "lr38", "lr39", "lr40", "lr41", "lr42", "lr43", "lr44", "lr45", \
118 "lr46", "lr47", "lr48", "lr49", "lr50", "lr51", "lr52", "lr53", "lr54", \
119 "lr55", "lr56", "lr57", "lr58", "lr59", "lr60", "lr61", "lr62", "lr63", \
120 "lr64", "lr65", "lr66", "lr67", "lr68", "lr69", "lr70", "lr71", "lr72", \
121 "lr73", "lr74", "lr75", "lr76", "lr77", "lr78", "lr79", "lr80", "lr81", \
122 "lr82", "lr83", "lr84", "lr85", "lr86", "lr87", "lr88", "lr89", "lr90", \
123 "lr91", "lr92", "lr93", "lr94", "lr95", "lr96", "lr97", "lr98", "lr99", \
124 "lr100", "lr101", "lr102", "lr103", "lr104", "lr105", "lr106", "lr107", \
125 "lr108", "lr109", "lr110", "lr111", "lr112", "lr113", "lr114", "lr115", \
126 "lr116", "lr117", "lr118", "lr119", "lr120", "lr121", "lr122", "lr123", \
127 "lr124", "lr125", "lr126", "lr127", \
128 "AI0", "AI1", "AI2", "AI3", "AI4", "AI5", "AI6", "AI7", "AI8", "AI9", \
129 "AI10", "AI11", "AI12", "AI13", "AI14", "AI15", "FP", \
130 "bp", "fc", "cr", "q", \
131 "vab", "ops", "cps", "cfg", "cha", "chd", "chc", "rbp", "tmc", "tmr", \
132 "pc0", "pc1", "pc2", "mmu", "lru", "fpe", "inte", "fps", "exo", "gr1", \
133 "alu", "ipc", "ipa", "ipb" }
136 * Converts an sdb register number to an internal gdb register number.
137 * Currently under epi, gr96->0...gr127->31...lr0->32...lr127->159, or...
138 * gr64->0...gr95->31, lr0->32...lr127->159.
140 #define SDB_REG_TO_REGNUM(value) \
141 (((value) >= 96 && (value) <= 127) ? ((value) - 96) : \
142 ((value) >= 128 && (value) <= 255) ? ((value) - 128 + LR0_REGNUM) : \
146 * Provide the processor register numbers of some registers that are
147 * expected/written in instructions that might change under different
148 * register sets. Namely, gcc can compile (-mkernel-registers) so that
149 * it uses gr64-gr95 in stead of gr96-gr127.
151 #define MSP_HW_REGNUM 125 /* gr125 */
152 #define RAB_HW_REGNUM 126 /* gr126 */
154 /* Convert Processor Special register #x to REGISTER_NAMES register # */
155 #define SR_REGNUM(x) \
156 ((x) < 15 ? VAB_REGNUM + (x) \
157 : (x) >= 128 && (x) < 131 ? IPC_REGNUM + (x) - 128 \
158 : (x) == 131 ? Q_REGNUM \
159 : (x) == 132 ? ALU_REGNUM \
160 : (x) >= 133 && (x) < 136 ? BP_REGNUM + (x) - 133 \
161 : (x) >= 160 && (x) < 163 ? FPE_REGNUM + (x) - 160 \
162 : (x) == 164 ? EXO_REGNUM \
163 : (error ("Internal error in SR_REGNUM"), 0))
164 #define GR96_REGNUM 0
166 /* Define the return register separately, so it can be overridden for
167 kernel procedure calling conventions. */
168 #define RETURN_REGNUM GR96_REGNUM
169 #define GR1_REGNUM 200
170 /* This needs to be the memory stack pointer, not the register stack pointer,
171 to make call_function work right. */
172 #define SP_REGNUM MSP_REGNUM
173 #define FP_REGNUM 33 /* lr1 */
175 /* Return register for transparent calling convention (gr122). */
176 #define TPC_REGNUM (122 - 96 + GR96_REGNUM)
178 /* Large Return Pointer (gr123). */
179 #define LRP_REGNUM (123 - 96 + GR96_REGNUM)
181 /* Static link pointer (gr124). */
182 #define SLP_REGNUM (124 - 96 + GR96_REGNUM)
184 /* Memory Stack Pointer (gr125). */
185 #define MSP_REGNUM (125 - 96 + GR96_REGNUM)
187 /* Register allocate bound (gr126). */
188 #define RAB_REGNUM (126 - 96 + GR96_REGNUM)
190 /* Register Free Bound (gr127). */
191 #define RFB_REGNUM (127 - 96 + GR96_REGNUM)
193 /* Register Stack Pointer. */
194 #define RSP_REGNUM GR1_REGNUM
195 #define LR0_REGNUM 32
196 #define BP_REGNUM 177
197 #define FC_REGNUM 178
198 #define CR_REGNUM 179
200 #define VAB_REGNUM 181
201 #define OPS_REGNUM (VAB_REGNUM + 1)
202 #define CPS_REGNUM (VAB_REGNUM + 2)
203 #define CFG_REGNUM (VAB_REGNUM + 3)
204 #define CHA_REGNUM (VAB_REGNUM + 4)
205 #define CHD_REGNUM (VAB_REGNUM + 5)
206 #define CHC_REGNUM (VAB_REGNUM + 6)
207 #define RBP_REGNUM (VAB_REGNUM + 7)
208 #define TMC_REGNUM (VAB_REGNUM + 8)
209 #define TMR_REGNUM (VAB_REGNUM + 9)
210 #define NPC_REGNUM (VAB_REGNUM + 10) /* pc0 */
211 #define PC_REGNUM (VAB_REGNUM + 11) /* pc1 */
212 #define PC2_REGNUM (VAB_REGNUM + 12)
213 #define MMU_REGNUM (VAB_REGNUM + 13)
214 #define LRU_REGNUM (VAB_REGNUM + 14)
215 #define FPE_REGNUM (VAB_REGNUM + 15)
216 #define INTE_REGNUM (VAB_REGNUM + 16)
217 #define FPS_REGNUM (VAB_REGNUM + 17)
218 #define EXO_REGNUM (VAB_REGNUM + 18)
219 /* gr1 is defined above as 200 = VAB_REGNUM + 19 */
220 #define ALU_REGNUM (VAB_REGNUM + 20)
221 #define PS_REGNUM ALU_REGNUM
222 #define IPC_REGNUM (VAB_REGNUM + 21)
223 #define IPA_REGNUM (VAB_REGNUM + 22)
224 #define IPB_REGNUM (VAB_REGNUM + 23)
226 #endif /* !defined(REGISTER_NAMES) */
228 /* Total amount of space needed to store our copies of the machine's
229 register state, the array `registers'. */
230 #define REGISTER_BYTES (NUM_REGS * 4)
232 /* Index within `registers' of the first byte of the space for
234 #define REGISTER_BYTE(N) ((N)*4)
236 /* Number of bytes of storage in the actual machine representation
239 /* All regs are 4 bytes. */
241 #define REGISTER_RAW_SIZE(N) (4)
243 /* Number of bytes of storage in the program's representation
246 /* All regs are 4 bytes. */
248 #define REGISTER_VIRTUAL_SIZE(N) (4)
250 /* Largest value REGISTER_RAW_SIZE can have. */
252 #define MAX_REGISTER_RAW_SIZE (4)
254 /* Largest value REGISTER_VIRTUAL_SIZE can have. */
256 #define MAX_REGISTER_VIRTUAL_SIZE (4)
258 /* Return the GDB type object for the "standard" data type
259 of data in register N. */
261 #define REGISTER_VIRTUAL_TYPE(N) \
262 (((N) == PC_REGNUM || (N) == LRP_REGNUM || (N) == SLP_REGNUM \
263 || (N) == MSP_REGNUM || (N) == RAB_REGNUM || (N) == RFB_REGNUM \
264 || (N) == GR1_REGNUM || (N) == FP_REGNUM || (N) == LR0_REGNUM \
265 || (N) == NPC_REGNUM || (N) == PC2_REGNUM) \
266 ? lookup_pointer_type (builtin_type_void) : builtin_type_int)
268 /* Store the address of the place in which to copy the structure the
269 subroutine will return. This is called from call_function. */
270 /* On the a29k the LRP points to the part of the structure beyond the first
272 #define STORE_STRUCT_RETURN(ADDR, SP) \
273 write_register (LRP_REGNUM, (ADDR) + 16 * 4);
275 /* Should call_function allocate stack space for a struct return? */
276 /* On the a29k objects over 16 words require the caller to allocate space. */
277 extern use_struct_convention_fn a29k_use_struct_convention
;
278 #define USE_STRUCT_CONVENTION(gcc_p, type) a29k_use_struct_convention (gcc_p, type)
280 /* Extract from an array REGBUF containing the (raw) register state
281 a function return value of type TYPE, and copy that, in virtual format,
284 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
286 int reg_length = TYPE_LENGTH (TYPE); \
287 if (reg_length > 16 * 4) \
289 reg_length = 16 * 4; \
290 read_memory (*((int *)(REGBUF) + LRP_REGNUM), (VALBUF) + 16 * 4, \
291 TYPE_LENGTH (TYPE) - 16 * 4); \
293 memcpy ((VALBUF), ((int *)(REGBUF))+RETURN_REGNUM, reg_length); \
296 /* Write into appropriate registers a function return value
297 of type TYPE, given in virtual format. */
299 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
301 int reg_length = TYPE_LENGTH (TYPE); \
302 if (reg_length > 16 * 4) \
304 reg_length = 16 * 4; \
305 write_memory (read_register (LRP_REGNUM), \
306 (char *)(VALBUF) + 16 * 4, \
307 TYPE_LENGTH (TYPE) - 16 * 4); \
309 write_register_bytes (REGISTER_BYTE (RETURN_REGNUM), (char *)(VALBUF), \
310 TYPE_LENGTH (TYPE)); \
314 /* The a29k user's guide documents well what the stacks look like.
315 But what isn't so clear there is how this interracts with the
316 symbols, or with GDB.
317 In the following saved_msp, saved memory stack pointer (which functions
318 as a memory frame pointer), means either
319 a register containing the memory frame pointer or, in the case of
320 functions with fixed size memory frames (i.e. those who don't use
321 alloca()), the result of the calculation msp + msize.
323 LOC_ARG, LOC_LOCAL - For GCC, these are relative to saved_msp.
324 For high C, these are relative to msp (making alloca impossible).
325 LOC_REGISTER, LOC_REGPARM - The register number is the number at the
326 time the function is running (after the prologue), or in the case
327 of LOC_REGPARM, may be a register number in the range 160-175.
329 The compilers do things like store an argument into memory, and then put out
330 a LOC_ARG for it, or put it into global registers and put out a
331 LOC_REGPARM. Thus is it important to execute the first line of
332 code (i.e. the line of the open brace, i.e. the prologue) of a function
333 before trying to print arguments or anything.
335 The following diagram attempts to depict what is going on in memory
336 (see also the _a29k user's guide_) and also how that interacts with
337 GDB frames. We arbitrarily pick fci->frame to point the same place
338 as the register stack pointer; since we set it ourself in
339 INIT_EXTRA_FRAME_INFO, and access it only through the FRAME_*
340 macros, it doesn't really matter exactly how we
341 do it. However, note that FRAME_FP is used in two ways in GDB:
342 (1) as a "magic cookie" which uniquely identifies frames (even over
343 calls to the inferior), (2) (in PC_IN_CALL_DUMMY [ON_STACK])
344 as the value of SP_REGNUM before the dummy frame was pushed. These
345 two meanings would be incompatible for the a29k if we defined
346 CALL_DUMMY_LOCATION == ON_STACK (but we don't, so don't worry about it).
347 Also note that "lr1" below, while called a frame pointer
348 in the user's guide, has only one function: To determine whether
349 registers need to be filled in the function epilogue.
354 bar: sub gr1,gr1,rsize_b
361 foo: sub gr1,gr1,rsize_f
366 loc3: < suppose the inferior stops here >
368 memory stack register stack
371 +------->|___________| | | ^
372 | | ^ | | locals_b | |
373 | | | | |____________| |
374 | | | | | | | rsize_b
375 | | | msize_b | | args_to_f | |
376 | | | | |____________| |
377 | | | | |____lr1_____| V
378 | | V | |____loc2____|<----------------+
379 | +--->|___________|<---------mfp | ^ |
380 | | | ^ | | locals_f | | |
381 | | | | msize_f | |____________| | |
382 | | | | | | | | rsize_f |
383 | | | V | | args | | |
384 | | |___________|<msp |____________| | |
385 | | |_____lr1____| V |
386 | | |___garbage__| <- gr1 <----+ |
393 | | |_________________| | |
394 | | |rsize=rsize_b | | |
395 | | |msize=msize_b | | |
396 +---|--------saved_msp | | |
397 | |frame------------------------------------|---+
399 | |_________________| |
402 +--------saved_msp | |
403 |frame------------------------------------+
407 So, is that sufficiently confusing? Welcome to the 29000.
409 * The frame for foo uses a memory frame pointer but the frame for
410 bar does not. In the latter case the saved_msp is
411 computed by adding msize to the saved_msp of the
413 * msize is in the frame cache only for high C's sake. */
416 void read_register_stack ();
417 long read_register_stack_integer ();
419 #define FRAME_INIT_SAVED_REGS(fi) /*no-op*/
421 #define EXTRA_FRAME_INFO \
422 CORE_ADDR saved_msp; \
423 unsigned int rsize; \
424 unsigned int msize; \
427 /* Bits for flags in EXTRA_FRAME_INFO */
428 #define TRANSPARENT_FRAME 0x1 /* This is a transparent frame */
429 #define MFP_USED 0x2 /* A memory frame pointer is used */
431 /* Because INIT_FRAME_PC gets passed fromleaf, that's where we init
432 not only ->pc and ->frame, but all the extra stuff, when called from
433 get_prev_frame, that is. */
434 #define INIT_EXTRA_FRAME_INFO(fromleaf, fci) init_extra_frame_info(fci)
435 void init_extra_frame_info ();
437 #define INIT_FRAME_PC(fromleaf, fci) init_frame_pc(fromleaf, fci)
438 void init_frame_pc ();
441 /* FRAME_CHAIN takes a FRAME
442 and produces the frame's chain-pointer.
444 However, if FRAME_CHAIN_VALID returns zero,
445 it means the given frame is the outermost one and has no caller. */
447 /* On the a29k, the nominal address of a frame is the address on the
448 register stack of the return address (the one next to the incoming
449 arguments, not down at the bottom so nominal address == stack pointer).
451 GDB expects "nominal address" to equal contents of FP_REGNUM,
452 at least when it comes time to create the innermost frame.
453 However, that doesn't work for us, so when creating the innermost
454 frame we set ->frame ourselves in INIT_EXTRA_FRAME_INFO. */
456 /* These are mostly dummies for the a29k because INIT_FRAME_PC
457 sets prev->frame instead. */
458 /* If rsize is zero, we must be at end of stack (or otherwise hosed).
459 If we don't check rsize, we loop forever if we see rsize == 0. */
460 #define FRAME_CHAIN(thisframe) \
461 ((thisframe)->rsize == 0 \
463 : (thisframe)->frame + (thisframe)->rsize)
465 /* Determine if the frame has a 'previous' and back-traceable frame. */
466 #define FRAME_IS_UNCHAINED(frame) ((frame)->flags & TRANSPARENT_FRAME)
468 /* Find the previous frame of a transparent routine.
469 * For now lets not try and trace through a transparent routine (we might
470 * have to assume that all transparent routines are traps).
472 #define FIND_PREV_UNCHAINED_FRAME(frame) 0
474 /* Define other aspects of the stack frame. */
476 /* An expression that tells us whether the function invocation represented
477 by FI does not have a frame on the stack associated with it. */
478 #define FRAMELESS_FUNCTION_INVOCATION(FI) \
479 (frameless_look_for_prologue (FI))
481 /* Saved pc (i.e. return address). */
482 #define FRAME_SAVED_PC(fraim) \
483 (read_register_stack_integer ((fraim)->frame + (fraim)->rsize, 4))
485 /* Local variables (i.e. LOC_LOCAL) are on the memory stack, with their
486 offsets being relative to the memory stack pointer (high C) or
489 #define FRAME_LOCALS_ADDRESS(fi) frame_locals_address (fi)
490 extern CORE_ADDR
frame_locals_address ();
492 /* Return number of args passed to a frame.
493 Can return -1, meaning no way to tell. */
494 /* We tried going to the effort of finding the tags word and getting
495 the argcount field from it, to support debugging assembler code.
496 Problem was, the "argcount" field never did hold the argument
498 #define FRAME_NUM_ARGS(fi) (-1)
500 #define FRAME_ARGS_ADDRESS(fi) FRAME_LOCALS_ADDRESS (fi)
502 /* Return number of bytes at start of arglist that are not really args. */
504 #define FRAME_ARGS_SKIP 0
506 /* Provide our own get_saved_register. HAVE_REGISTER_WINDOWS is insufficient
507 because registers get renumbered on the a29k without getting saved. */
513 void a29k_get_saved_register
PARAMS ((char *raw_buffer
, int *optimized
, CORE_ADDR
*addrp
, struct frame_info
*frame
, int regnum
, enum lval_type
*lvalp
));
514 #define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \
515 a29k_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
517 /* Call function stuff. */
519 /* The dummy frame looks like this (see also the general frame picture
524 | | frame for function
525 | locals_sproc | executing at time
526 |________________| of call_function.
527 | | We must not disturb
528 | args_out_sproc | it.
529 memory stack |________________|
530 |____lr1_sproc___|<-+
531 | | |__retaddr_sproc_| | <-- gr1 (at start)
532 |____________|<-msp 0 <-----------mfp_dummy_____| |
533 | | (at start) | save regs | |
534 | arg_slop | | pc0,pc1 | |
535 | | | pc2,lr0 sproc | |
536 | (16 words) | | gr96-gr124 | |
537 |____________|<-msp 1--after | sr160-sr162 | |
538 | | PUSH_DUMMY_FRAME| sr128-sr135 | |
539 | struct ret | |________________| |
541 |____________|<- lrp | args_out_dummy | |
542 | struct ret | | (16 words) | |
543 | 16 | |________________| |
544 | (16 words) | |____lr1_dummy___|--+
545 |____________|<- msp 2--after |_retaddr_dummy__|<- gr1 after
546 | | struct ret | | PUSH_DUMMY_FRAME
547 | margs17+ | area allocated | locals_inf |
548 | | |________________| called
549 |____________|<- msp 4--when | | function's
550 | | inf called | args_out_inf | frame (set up
551 | margs16 | |________________| by called
552 | (16 words) | |_____lr1_inf____| function).
553 |____________|<- msp 3--after | . |
554 | | args pushed | . |
558 arg_slop: This area is so that when the call dummy adds 16 words to
559 the msp, it won't end up larger than mfp_dummy (it is needed in the
560 case where margs and struct_ret do not add up to at least 16 words).
561 struct ret: This area is allocated by GDB if the return value is more
562 than 16 words. struct ret_16 is not used on the a29k.
563 margs: Pushed by GDB. The call dummy copies the first 16 words to
565 retaddr_sproc: Contains the PC at the time we call the function.
566 set by PUSH_DUMMY_FRAME and read by POP_FRAME.
567 retaddr_dummy: This points to a breakpoint instruction in the dummy. */
570 /* Rsize for dummy frame, in bytes. */
572 /* Bytes for outgoing args, lr1, and retaddr. */
573 #define DUMMY_ARG (2 * 4 + 16 * 4)
575 /* Number of special registers (sr128-) to save. */
576 #define DUMMY_SAVE_SR128 8
577 /* Number of special registers (sr160-) to save. */
578 #define DUMMY_SAVE_SR160 3
579 /* Number of general (gr96- or gr64-) registers to save. */
580 #define DUMMY_SAVE_GREGS 29
582 #define DUMMY_FRAME_RSIZE \
584 + 4 * 4 /* pc0, pc1, pc2, lr0 */ \
585 + DUMMY_SAVE_GREGS * 4 \
586 + DUMMY_SAVE_SR160 * 4 \
587 + DUMMY_SAVE_SR128 * 4 \
589 + 4 /* pad to doubleword */ )
591 /* Push an empty stack frame, to record the current PC, etc. */
593 #define PUSH_DUMMY_FRAME push_dummy_frame()
594 extern void push_dummy_frame ();
596 /* Discard from the stack the innermost frame,
597 restoring all saved registers. */
599 #define POP_FRAME pop_frame()
600 extern void pop_frame ();
602 /* This sequence of words is the instructions
604 loadm 0, 0, lr2, msp ; load first 16 words of arguments into registers
605 add msp, msp, 16 * 4 ; point to the remaining arguments
607 const lr0,inf ; (replaced by half of target addr)
608 consth lr0,inf ; (replaced by other half of target addr)
610 aseq 0x40,gr1,gr1 ; nop
612 asneq 0x50,gr1,gr1 ; breakpoint (replaced by local breakpoint insn)
615 #if TARGET_BYTE_ORDER == HOST_BYTE_ORDER
616 #define BS(const) const
618 #define BS(const) (((const) & 0xff) << 24) | \
619 (((const) & 0xff00) << 8) | \
620 (((const) & 0xff0000) >> 8) | \
621 (((const) & 0xff000000) >> 24)
624 /* Position of the "const" and blkt instructions within CALL_DUMMY in bytes. */
625 #define CONST_INSN (3 * 4)
626 #define BREAKPT_INSN (7 * 4)
627 #define CALL_DUMMY { \
629 BS(0x36008200|(MSP_HW_REGNUM)), \
630 BS(0x15000040|(MSP_HW_REGNUM<<8)|(MSP_HW_REGNUM<<16)), \
636 #define CALL_DUMMY_LENGTH (8 * 4)
638 #define CALL_DUMMY_START_OFFSET 0 /* Start execution at beginning of dummy */
640 /* Helper macro for FIX_CALL_DUMMY. WORDP is a long * which points to a
641 word in target byte order; bits 0-7 and 16-23 of *WORDP are replaced with
642 bits 0-7 and 8-15 of DATA (which is in host byte order). */
644 #if TARGET_BYTE_ORDER == BIG_ENDIAN
645 #define STUFF_I16(WORDP, DATA) \
647 *((char *)(WORDP) + 3) = ((DATA) & 0xff);\
648 *((char *)(WORDP) + 1) = (((DATA) >> 8) & 0xff);\
650 #else /* Target is little endian. */
651 #define STUFF_I16(WORDP, DATA) \
653 *(char *)(WORDP
) = ((DATA
) & 0xff);
654 *((char *)(WORDP
) + 2) = (((DATA
) >> 8) & 0xff);
656 #endif /* Target is little endian. */
658 /* Insert the specified number of args and function address
659 into a call sequence of the above form stored at DUMMYNAME. */
661 /* Currently this stuffs in the address of the function that we are calling.
662 Since different a29k systems use different breakpoint instructions, it
663 also stuffs BREAKPOINT in the right place (to avoid having to
664 duplicate CALL_DUMMY in each tm-*.h file). */
666 #define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
668 STUFF_I16((char *)dummyname + CONST_INSN, fun); \
669 STUFF_I16((char *)dummyname + CONST_INSN + 4, fun >> 16); \
670 /* FIXME memcpy ((char *)(dummyname) + BREAKPT_INSN, break_insn, 4); */ \
673 /* a29k architecture has separate data & instruction memories -- wired to
674 different pins on the chip -- and can't execute the data memory.
675 Also, there should be space after text_end;
676 we won't get a SIGSEGV or scribble on data space. */
678 #define CALL_DUMMY_LOCATION AFTER_TEXT_END
680 /* Because of this, we need (as a kludge) to know the addresses of the
683 #define NEED_TEXT_START_END 1
685 /* How to translate register numbers in the .stab's into gdb's internal register
686 numbers. We don't translate them, but we warn if an invalid register
687 number is seen. Note that FIXME, we use the value "sym" as an implicit
688 argument in printing the error message. It happens to be available where
689 this macro is used. (This macro definition appeared in a late revision
690 of gdb-3.91.6 and is not well tested. Also, it should be a "complaint".) */
692 #define STAB_REG_TO_REGNUM(num) \
693 (((num) > LR0_REGNUM + 127) \
695 "Invalid register number %d in symbol table entry for %s\n", \
696 (num), SYMBOL_SOURCE_NAME (sym)), (num) \
699 extern enum a29k_processor_types
{
702 /* Bit 0x400 of the CPS does *not* identify freeze mode, i.e. 29000,
706 /* Bit 0x400 of the CPS does identify freeze mode, i.e. 29050. */
710 /* We need three arguments for a general frame specification for the
711 "frame" or "info frame" command. */
713 #define SETUP_ARBITRARY_FRAME(argc, argv) setup_arbitrary_frame (argc, argv)
714 extern struct frame_info
*setup_arbitrary_frame
PARAMS ((int, CORE_ADDR
*));