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c906108c SS |
1 | /* Target machine sub-parameters for SPARC, for GDB, the GNU debugger. |
2 | This is included by other tm-*.h files to define SPARC cpu-related info. | |
3 | Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994 | |
4 | Free Software Foundation, Inc. | |
5 | Contributed by Michael Tiemann (tiemann@mcc.com) | |
6 | ||
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b JM |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, | |
22 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
23 | |
24 | #ifdef __STDC__ | |
25 | struct frame_info; | |
26 | struct type; | |
27 | struct value; | |
28 | #endif | |
29 | ||
30 | #define TARGET_BYTE_ORDER BIG_ENDIAN | |
31 | ||
32 | /* Floating point is IEEE compatible. */ | |
33 | #define IEEE_FLOAT | |
34 | ||
35 | /* If an argument is declared "register", Sun cc will keep it in a register, | |
36 | never saving it onto the stack. So we better not believe the "p" symbol | |
37 | descriptor stab. */ | |
38 | ||
39 | #define USE_REGISTER_NOT_ARG | |
40 | ||
41 | /* When passing a structure to a function, Sun cc passes the address | |
42 | not the structure itself. It (under SunOS4) creates two symbols, | |
43 | which we need to combine to a LOC_REGPARM. Gcc version two (as of | |
44 | 1.92) behaves like sun cc. REG_STRUCT_HAS_ADDR is smart enough to | |
45 | distinguish between Sun cc, gcc version 1 and gcc version 2. */ | |
46 | ||
47 | #define REG_STRUCT_HAS_ADDR(gcc_p,type) (gcc_p != 1) | |
48 | ||
49 | /* Sun /bin/cc gets this right as of SunOS 4.1.x. We need to define | |
50 | BELIEVE_PCC_PROMOTION to get this right now that the code which | |
51 | detects gcc2_compiled. is broken. This loses for SunOS 4.0.x and | |
52 | earlier. */ | |
53 | ||
54 | #define BELIEVE_PCC_PROMOTION 1 | |
55 | ||
56 | /* For acc, there's no need to correct LBRAC entries by guessing how | |
57 | they should work. In fact, this is harmful because the LBRAC | |
58 | entries now all appear at the end of the function, not intermixed | |
59 | with the SLINE entries. n_opt_found detects acc for Solaris binaries; | |
60 | function_stab_type detects acc for SunOS4 binaries. | |
61 | ||
62 | For binary from SunOS4 /bin/cc, need to correct LBRAC's. | |
63 | ||
64 | For gcc, like acc, don't correct. */ | |
65 | ||
66 | #define SUN_FIXED_LBRAC_BUG \ | |
67 | (n_opt_found \ | |
68 | || function_stab_type == N_STSYM \ | |
69 | || function_stab_type == N_GSYM \ | |
70 | || processing_gcc_compilation) | |
71 | ||
72 | /* Do variables in the debug stabs occur after the N_LBRAC or before it? | |
73 | acc: after, gcc: before, SunOS4 /bin/cc: before. */ | |
74 | ||
75 | #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) \ | |
76 | (!(gcc_p) \ | |
77 | && (n_opt_found \ | |
78 | || function_stab_type == N_STSYM \ | |
79 | || function_stab_type == N_GSYM)) | |
80 | ||
81 | /* Offset from address of function to start of its code. | |
82 | Zero on most machines. */ | |
83 | ||
84 | #define FUNCTION_START_OFFSET 0 | |
85 | ||
86 | /* Advance PC across any function entry prologue instructions | |
87 | to reach some "real" code. SKIP_PROLOGUE_FRAMELESS_P advances | |
88 | the PC past some of the prologue, but stops as soon as it | |
89 | knows that the function has a frame. Its result is equal | |
90 | to its input PC if the function is frameless, unequal otherwise. */ | |
91 | ||
b83266a0 SS |
92 | #define SKIP_PROLOGUE(pc) (sparc_skip_prologue (pc, 0)) |
93 | #define SKIP_PROLOGUE_FRAMELESS_P(pc) (sparc_skip_prologue (pc, 1)) | |
94 | extern CORE_ADDR sparc_skip_prologue PARAMS ((CORE_ADDR, int)); | |
c906108c SS |
95 | |
96 | /* Immediately after a function call, return the saved pc. | |
97 | Can't go through the frames for this because on some machines | |
98 | the new frame is not set up until the new function executes | |
99 | some instructions. */ | |
100 | ||
101 | /* On the Sun 4 under SunOS, the compile will leave a fake insn which | |
102 | encodes the structure size being returned. If we detect such | |
103 | a fake insn, step past it. */ | |
104 | ||
105 | #define PC_ADJUST(pc) sparc_pc_adjust(pc) | |
106 | extern CORE_ADDR sparc_pc_adjust PARAMS ((CORE_ADDR)); | |
107 | ||
108 | #define SAVED_PC_AFTER_CALL(frame) PC_ADJUST (read_register (RP_REGNUM)) | |
109 | ||
110 | /* Stack grows downward. */ | |
111 | ||
112 | #define INNER_THAN(lhs,rhs) ((lhs) < (rhs)) | |
113 | ||
114 | /* Stack must be aligned on 64-bit boundaries when synthesizing | |
115 | function calls. */ | |
116 | ||
117 | #define STACK_ALIGN(ADDR) (((ADDR) + 7) & -8) | |
118 | ||
119 | /* Sequence of bytes for breakpoint instruction (ta 1). */ | |
120 | ||
121 | #define BREAKPOINT {0x91, 0xd0, 0x20, 0x01} | |
122 | ||
123 | /* Amount PC must be decremented by after a breakpoint. | |
124 | This is often the number of bytes in BREAKPOINT | |
125 | but not always. */ | |
126 | ||
127 | #define DECR_PC_AFTER_BREAK 0 | |
128 | ||
129 | /* Say how long (ordinary) registers are. This is a piece of bogosity | |
130 | used in push_word and a few other places; REGISTER_RAW_SIZE is the | |
131 | real way to know how big a register is. */ | |
132 | ||
133 | #define REGISTER_SIZE 4 | |
134 | ||
135 | /* Number of machine registers */ | |
136 | ||
137 | #define NUM_REGS 72 | |
138 | ||
139 | /* Initializer for an array of names of registers. | |
140 | There should be NUM_REGS strings in this initializer. */ | |
141 | ||
142 | #define REGISTER_NAMES \ | |
143 | { "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7", \ | |
144 | "o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7", \ | |
145 | "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7", \ | |
146 | "i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7", \ | |
147 | \ | |
148 | "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \ | |
149 | "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \ | |
150 | "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \ | |
151 | "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \ | |
152 | \ | |
153 | "y", "psr", "wim", "tbr", "pc", "npc", "fpsr", "cpsr" } | |
154 | ||
155 | /* Register numbers of various important registers. | |
156 | Note that some of these values are "real" register numbers, | |
157 | and correspond to the general registers of the machine, | |
158 | and some are "phony" register numbers which are too large | |
159 | to be actual register numbers as far as the user is concerned | |
160 | but do serve to get the desired values when passed to read_register. */ | |
161 | ||
c5aa993b | 162 | #define G0_REGNUM 0 /* %g0 */ |
c906108c SS |
163 | #define G1_REGNUM 1 /* %g1 */ |
164 | #define O0_REGNUM 8 /* %o0 */ | |
165 | #define SP_REGNUM 14 /* Contains address of top of stack, \ | |
166 | which is also the bottom of the frame. */ | |
167 | #define RP_REGNUM 15 /* Contains return address value, *before* \ | |
168 | any windows get switched. */ | |
169 | #define O7_REGNUM 15 /* Last local reg not saved on stack frame */ | |
170 | #define L0_REGNUM 16 /* First local reg that's saved on stack frame | |
171 | rather than in machine registers */ | |
172 | #define I0_REGNUM 24 /* %i0 */ | |
173 | #define FP_REGNUM 30 /* Contains address of executing stack frame */ | |
174 | #define I7_REGNUM 31 /* Last local reg saved on stack frame */ | |
175 | #define FP0_REGNUM 32 /* Floating point register 0 */ | |
176 | #define Y_REGNUM 64 /* Temp register for multiplication, etc. */ | |
177 | #define PS_REGNUM 65 /* Contains processor status */ | |
178 | #define PS_FLAG_CARRY 0x100000 /* Carry bit in PS */ | |
179 | #define WIM_REGNUM 66 /* Window Invalid Mask (not really supported) */ | |
180 | #define TBR_REGNUM 67 /* Trap Base Register (not really supported) */ | |
181 | #define PC_REGNUM 68 /* Contains program counter */ | |
c5aa993b | 182 | #define NPC_REGNUM 69 /* Contains next PC */ |
c906108c SS |
183 | #define FPS_REGNUM 70 /* Floating point status register */ |
184 | #define CPS_REGNUM 71 /* Coprocessor status register */ | |
185 | ||
186 | /* Total amount of space needed to store our copies of the machine's | |
187 | register state, the array `registers'. On the sparc, `registers' | |
188 | contains the ins and locals, even though they are saved on the | |
189 | stack rather than with the other registers, and this causes hair | |
190 | and confusion in places like pop_frame. It might be | |
191 | better to remove the ins and locals from `registers', make sure | |
192 | that get_saved_register can get them from the stack (even in the | |
193 | innermost frame), and make this the way to access them. For the | |
194 | frame pointer we would do that via TARGET_READ_FP. On the other hand, | |
195 | that is likely to be confusing or worse for flat frames. */ | |
196 | ||
197 | #define REGISTER_BYTES (32*4+32*4+8*4) | |
198 | ||
199 | /* Index within `registers' of the first byte of the space for | |
200 | register N. */ | |
201 | /* ?? */ | |
202 | #define REGISTER_BYTE(N) ((N)*4) | |
203 | ||
204 | /* We need to override GET_SAVED_REGISTER so that we can deal with the way | |
205 | outs change into ins in different frames. HAVE_REGISTER_WINDOWS can't | |
206 | deal with this case and also handle flat frames at the same time. */ | |
207 | ||
7a292a7a SS |
208 | #ifdef __STDC__ |
209 | struct frame_info; | |
210 | enum lval_type; | |
211 | #endif | |
c5aa993b | 212 | void sparc_get_saved_register PARAMS ((char *raw_buffer, int *optimized, CORE_ADDR * addrp, struct frame_info * frame, int regnum, enum lval_type * lvalp)); |
7a292a7a SS |
213 | #define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \ |
214 | sparc_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval) | |
c906108c SS |
215 | |
216 | /* Number of bytes of storage in the actual machine representation | |
217 | for register N. */ | |
218 | ||
219 | /* On the SPARC, all regs are 4 bytes. */ | |
220 | ||
221 | #define REGISTER_RAW_SIZE(N) (4) | |
222 | ||
223 | /* Number of bytes of storage in the program's representation | |
224 | for register N. */ | |
225 | ||
226 | /* On the SPARC, all regs are 4 bytes. */ | |
227 | ||
228 | #define REGISTER_VIRTUAL_SIZE(N) (4) | |
229 | ||
230 | /* Largest value REGISTER_RAW_SIZE can have. */ | |
231 | ||
232 | #define MAX_REGISTER_RAW_SIZE 8 | |
233 | ||
234 | /* Largest value REGISTER_VIRTUAL_SIZE can have. */ | |
235 | ||
236 | #define MAX_REGISTER_VIRTUAL_SIZE 8 | |
237 | ||
238 | /* Return the GDB type object for the "standard" data type | |
239 | of data in register N. */ | |
240 | ||
241 | #define REGISTER_VIRTUAL_TYPE(N) \ | |
242 | ((N) < 32 ? builtin_type_int : (N) < 64 ? builtin_type_float : \ | |
243 | builtin_type_int) | |
244 | ||
245 | /* Writing to %g0 is a noop (not an error or exception or anything like | |
246 | that, however). */ | |
247 | ||
248 | #define CANNOT_STORE_REGISTER(regno) ((regno) == G0_REGNUM) | |
249 | ||
250 | /* Store the address of the place in which to copy the structure the | |
251 | subroutine will return. This is called from call_function_by_hand. | |
252 | The ultimate mystery is, tho, what is the value "16"? */ | |
253 | ||
254 | #define STORE_STRUCT_RETURN(ADDR, SP) \ | |
255 | { char val[4]; \ | |
256 | store_unsigned_integer (val, 4, (ADDR)); \ | |
257 | write_memory ((SP)+(16*4), val, 4); } | |
258 | ||
259 | /* Extract from an array REGBUF containing the (raw) register state | |
260 | a function return value of type TYPE, and copy that, in virtual format, | |
261 | into VALBUF. */ | |
262 | ||
263 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ | |
264 | sparc_extract_return_value(TYPE, REGBUF, VALBUF) | |
265 | extern void | |
c5aa993b | 266 | sparc_extract_return_value PARAMS ((struct type *, char[], char *)); |
c906108c SS |
267 | |
268 | /* Write into appropriate registers a function return value | |
269 | of type TYPE, given in virtual format. */ | |
270 | #define STORE_RETURN_VALUE(TYPE,VALBUF) \ | |
271 | sparc_store_return_value(TYPE, VALBUF) | |
272 | extern void sparc_store_return_value PARAMS ((struct type *, char *)); | |
273 | ||
274 | /* Extract from an array REGBUF containing the (raw) register state | |
275 | the address in which a function should return its structure value, | |
276 | as a CORE_ADDR (or an expression that can be used as one). */ | |
277 | ||
278 | #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \ | |
279 | (sparc_extract_struct_value_address (REGBUF)) | |
280 | ||
281 | extern CORE_ADDR | |
c5aa993b | 282 | sparc_extract_struct_value_address PARAMS ((char[REGISTER_BYTES])); |
c906108c | 283 | \f |
c5aa993b | 284 | |
c906108c SS |
285 | /* Describe the pointer in each stack frame to the previous stack frame |
286 | (its caller). */ | |
287 | ||
288 | /* FRAME_CHAIN takes a frame's nominal address | |
289 | and produces the frame's chain-pointer. */ | |
290 | ||
291 | /* In the case of the Sun 4, the frame-chain's nominal address | |
292 | is held in the frame pointer register. | |
293 | ||
294 | On the Sun4, the frame (in %fp) is %sp for the previous frame. | |
295 | From the previous frame's %sp, we can find the previous frame's | |
296 | %fp: it is in the save area just above the previous frame's %sp. | |
297 | ||
298 | If we are setting up an arbitrary frame, we'll need to know where | |
299 | it ends. Hence the following. This part of the frame cache | |
300 | structure should be checked before it is assumed that this frame's | |
301 | bottom is in the stack pointer. | |
302 | ||
303 | If there isn't a frame below this one, the bottom of this frame is | |
304 | in the stack pointer. | |
305 | ||
306 | If there is a frame below this one, and the frame pointers are | |
307 | identical, it's a leaf frame and the bottoms are the same also. | |
308 | ||
309 | Otherwise the bottom of this frame is the top of the next frame. | |
310 | ||
311 | The bottom field is misnamed, since it might imply that memory from | |
312 | bottom to frame contains this frame. That need not be true if | |
313 | stack frames are allocated in different segments (e.g. some on a | |
314 | stack, some on a heap in the data segment). | |
315 | ||
316 | GCC 2.6 and later can generate ``flat register window'' code that | |
317 | makes frames by explicitly saving those registers that need to be | |
318 | saved. %i7 is used as the frame pointer, and the frame is laid out so | |
319 | that flat and non-flat calls can be intermixed freely within a | |
320 | program. Unfortunately for GDB, this means it must detect and record | |
321 | the flatness of frames. | |
322 | ||
323 | Since the prologue in a flat frame also tells us where fp and pc | |
324 | have been stashed (the frame is of variable size, so their location | |
325 | is not fixed), it's convenient to record them in the frame info. */ | |
326 | ||
327 | #define EXTRA_FRAME_INFO \ | |
328 | CORE_ADDR bottom; \ | |
329 | int in_prologue; \ | |
330 | int flat; \ | |
331 | /* Following fields only relevant for flat frames. */ \ | |
332 | CORE_ADDR pc_addr; \ | |
333 | CORE_ADDR fp_addr; \ | |
334 | /* Add this to ->frame to get the value of the stack pointer at the */ \ | |
335 | /* time of the register saves. */ \ | |
336 | int sp_offset; | |
337 | ||
c5aa993b | 338 | #define FRAME_INIT_SAVED_REGS(fp) /*no-op */ |
c906108c SS |
339 | |
340 | #define INIT_EXTRA_FRAME_INFO(fromleaf, fci) \ | |
341 | sparc_init_extra_frame_info (fromleaf, fci) | |
c5aa993b | 342 | extern void sparc_init_extra_frame_info PARAMS ((int, struct frame_info *)); |
c906108c SS |
343 | |
344 | #define PRINT_EXTRA_FRAME_INFO(fi) \ | |
345 | { \ | |
346 | if ((fi) && (fi)->flat) \ | |
347 | printf_filtered (" flat, pc saved at 0x%x, fp saved at 0x%x\n", \ | |
348 | (fi)->pc_addr, (fi)->fp_addr); \ | |
349 | } | |
350 | ||
351 | #define FRAME_CHAIN(thisframe) (sparc_frame_chain (thisframe)) | |
352 | extern CORE_ADDR sparc_frame_chain PARAMS ((struct frame_info *)); | |
353 | ||
354 | /* INIT_EXTRA_FRAME_INFO needs the PC to detect flat frames. */ | |
355 | ||
c5aa993b | 356 | #define INIT_FRAME_PC(fromleaf, prev) /* nothing */ |
c906108c SS |
357 | #define INIT_FRAME_PC_FIRST(fromleaf, prev) \ |
358 | (prev)->pc = ((fromleaf) ? SAVED_PC_AFTER_CALL ((prev)->next) : \ | |
359 | (prev)->next ? FRAME_SAVED_PC ((prev)->next) : read_pc ()); | |
360 | ||
361 | /* Define other aspects of the stack frame. */ | |
362 | ||
363 | /* A macro that tells us whether the function invocation represented | |
364 | by FI does not have a frame on the stack associated with it. If it | |
365 | does not, FRAMELESS is set to 1, else 0. */ | |
392a587b JM |
366 | #define FRAMELESS_FUNCTION_INVOCATION(FI) \ |
367 | (frameless_look_for_prologue(FI)) | |
c906108c SS |
368 | |
369 | /* The location of I0 w.r.t SP. This is actually dependent on how the system's | |
370 | window overflow/underflow routines are written. Most vendors save the L regs | |
371 | followed by the I regs (at the higher address). Some vendors get it wrong. | |
372 | */ | |
373 | ||
374 | #define FRAME_SAVED_L0 0 | |
375 | #define FRAME_SAVED_I0 (8 * REGISTER_RAW_SIZE (L0_REGNUM)) | |
376 | ||
377 | /* Where is the PC for a specific frame */ | |
378 | ||
379 | #define FRAME_SAVED_PC(FRAME) sparc_frame_saved_pc (FRAME) | |
380 | extern CORE_ADDR sparc_frame_saved_pc PARAMS ((struct frame_info *)); | |
381 | ||
382 | /* If the argument is on the stack, it will be here. */ | |
383 | #define FRAME_ARGS_ADDRESS(fi) ((fi)->frame) | |
384 | ||
385 | #define FRAME_STRUCT_ARGS_ADDRESS(fi) ((fi)->frame) | |
386 | ||
387 | #define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame) | |
388 | ||
389 | /* Set VAL to the number of args passed to frame described by FI. | |
390 | Can set VAL to -1, meaning no way to tell. */ | |
391 | ||
392 | /* We can't tell how many args there are | |
393 | now that the C compiler delays popping them. */ | |
392a587b | 394 | #define FRAME_NUM_ARGS(fi) (-1) |
c906108c SS |
395 | |
396 | /* Return number of bytes at start of arglist that are not really args. */ | |
397 | ||
398 | #define FRAME_ARGS_SKIP 68 | |
399 | \f | |
400 | /* Things needed for making the inferior call functions. */ | |
401 | /* | |
402 | * First of all, let me give my opinion of what the DUMMY_FRAME | |
403 | * actually looks like. | |
404 | * | |
405 | * | | | |
406 | * | | | |
407 | * + - - - - - - - - - - - - - - - - +<-- fp (level 0) | |
408 | * | | | |
409 | * | | | |
410 | * | | | |
411 | * | | | |
412 | * | Frame of innermost program | | |
413 | * | function | | |
414 | * | | | |
415 | * | | | |
416 | * | | | |
417 | * | | | |
418 | * | | | |
419 | * |---------------------------------|<-- sp (level 0), fp (c) | |
420 | * | | | |
421 | * DUMMY | fp0-31 | | |
422 | * | | | |
423 | * | ------ |<-- fp - 0x80 | |
424 | * FRAME | g0-7 |<-- fp - 0xa0 | |
425 | * | i0-7 |<-- fp - 0xc0 | |
426 | * | other |<-- fp - 0xe0 | |
427 | * | ? | | |
428 | * | ? | | |
429 | * |---------------------------------|<-- sp' = fp - 0x140 | |
430 | * | | | |
431 | * xcution start | | | |
432 | * sp' + 0x94 -->| CALL_DUMMY (x code) | | |
433 | * | | | |
434 | * | | | |
435 | * |---------------------------------|<-- sp'' = fp - 0x200 | |
436 | * | align sp to 8 byte boundary | | |
437 | * | ==> args to fn <== | | |
438 | * Room for | | | |
439 | * i & l's + agg | CALL_DUMMY_STACK_ADJUST = 0x0x44| | |
440 | * |---------------------------------|<-- final sp (variable) | |
441 | * | | | |
442 | * | Where function called will | | |
443 | * | build frame. | | |
444 | * | | | |
445 | * | | | |
446 | * | |
447 | * I understand everything in this picture except what the space | |
448 | * between fp - 0xe0 and fp - 0x140 is used for. Oh, and I don't | |
449 | * understand why there's a large chunk of CALL_DUMMY that never gets | |
450 | * executed (its function is superceeded by PUSH_DUMMY_FRAME; they | |
451 | * are designed to do the same thing). | |
452 | * | |
453 | * PUSH_DUMMY_FRAME saves the registers above sp' and pushes the | |
454 | * register file stack down one. | |
455 | * | |
456 | * call_function then writes CALL_DUMMY, pushes the args onto the | |
457 | * stack, and adjusts the stack pointer. | |
458 | * | |
459 | * run_stack_dummy then starts execution (in the middle of | |
460 | * CALL_DUMMY, as directed by call_function). | |
461 | */ | |
462 | ||
463 | /* Push an empty stack frame, to record the current PC, etc. */ | |
464 | ||
465 | #define PUSH_DUMMY_FRAME sparc_push_dummy_frame () | |
466 | #define POP_FRAME sparc_pop_frame () | |
467 | ||
468 | void sparc_push_dummy_frame PARAMS ((void)), sparc_pop_frame PARAMS ((void)); | |
469 | ||
470 | #ifndef CALL_DUMMY | |
471 | /* This sequence of words is the instructions | |
472 | ||
473 | 0: bc 10 00 01 mov %g1, %fp | |
474 | 4: 9d e3 80 00 save %sp, %g0, %sp | |
475 | 8: bc 10 00 02 mov %g2, %fp | |
476 | c: be 10 00 03 mov %g3, %i7 | |
c5aa993b JM |
477 | 10: da 03 a0 58 ld [ %sp + 0x58 ], %o5 |
478 | 14: d8 03 a0 54 ld [ %sp + 0x54 ], %o4 | |
479 | 18: d6 03 a0 50 ld [ %sp + 0x50 ], %o3 | |
480 | 1c: d4 03 a0 4c ld [ %sp + 0x4c ], %o2 | |
481 | 20: d2 03 a0 48 ld [ %sp + 0x48 ], %o1 | |
482 | 24: 40 00 00 00 call <fun> | |
483 | 28: d0 03 a0 44 ld [ %sp + 0x44 ], %o0 | |
484 | 2c: 01 00 00 00 nop | |
485 | 30: 91 d0 20 01 ta 1 | |
486 | 34: 01 00 00 00 nop | |
c906108c SS |
487 | |
488 | NOTES: | |
c5aa993b JM |
489 | * the first four instructions are necessary only on the simulator. |
490 | * this is a multiple of 8 (not only 4) bytes. | |
491 | * the `call' insn is a relative, not an absolute call. | |
492 | * the `nop' at the end is needed to keep the trap from | |
493 | clobbering things (if NPC pointed to garbage instead). | |
494 | */ | |
c906108c SS |
495 | |
496 | #define CALL_DUMMY { 0xbc100001, 0x9de38000, 0xbc100002, 0xbe100003, \ | |
497 | 0xda03a058, 0xd803a054, 0xd603a050, 0xd403a04c, \ | |
498 | 0xd203a048, 0x40000000, 0xd003a044, 0x01000000, \ | |
499 | 0x91d02001, 0x01000000 } | |
500 | ||
501 | ||
502 | /* Size of the call dummy in bytes. */ | |
503 | ||
504 | #define CALL_DUMMY_LENGTH 0x38 | |
505 | ||
506 | /* Offset within call dummy of first instruction to execute. */ | |
507 | ||
508 | #define CALL_DUMMY_START_OFFSET 0 | |
509 | ||
510 | /* Offset within CALL_DUMMY of the 'call' instruction. */ | |
511 | ||
512 | #define CALL_DUMMY_CALL_OFFSET (CALL_DUMMY_START_OFFSET + 0x24) | |
513 | ||
514 | /* Offset within CALL_DUMMY of the 'ta 1' instruction. */ | |
515 | ||
516 | #define CALL_DUMMY_BREAKPOINT_OFFSET (CALL_DUMMY_START_OFFSET + 0x30) | |
517 | ||
518 | #define CALL_DUMMY_STACK_ADJUST 68 | |
519 | ||
520 | #endif | |
521 | /* Insert the specified number of args and function address | |
522 | into a call sequence of the above form stored at DUMMYNAME. */ | |
523 | ||
524 | #define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \ | |
525 | sparc_fix_call_dummy (dummyname, pc, fun, type, gcc_p) | |
526 | void sparc_fix_call_dummy PARAMS ((char *dummy, CORE_ADDR pc, CORE_ADDR fun, | |
c5aa993b | 527 | struct type * value_type, int using_gcc)); |
c906108c SS |
528 | |
529 | /* The Sparc returns long doubles on the stack. */ | |
530 | ||
531 | #define RETURN_VALUE_ON_STACK(TYPE) \ | |
532 | (TYPE_CODE(TYPE) == TYPE_CODE_FLT \ | |
533 | && TYPE_LENGTH(TYPE) > 8) | |
534 | \f | |
535 | /* Sparc has no reliable single step ptrace call */ | |
536 | ||
537 | #define SOFTWARE_SINGLE_STEP_P 1 | |
538 | extern void sparc_software_single_step PARAMS ((unsigned int, int)); | |
539 | #define SOFTWARE_SINGLE_STEP(sig,bp_p) sparc_software_single_step (sig,bp_p) | |
540 | ||
541 | /* We need more arguments in a frame specification for the | |
542 | "frame" or "info frame" command. */ | |
543 | ||
544 | #define SETUP_ARBITRARY_FRAME(argc, argv) setup_arbitrary_frame (argc, argv) | |
545 | extern struct frame_info *setup_arbitrary_frame PARAMS ((int, CORE_ADDR *)); | |
546 | ||
547 | /* To print every pair of float registers as a double, we use this hook. | |
548 | We also print the condition code registers in a readable format | |
549 | (FIXME: can expand this to all control regs). */ | |
550 | ||
551 | #undef PRINT_REGISTER_HOOK | |
552 | #define PRINT_REGISTER_HOOK(regno) \ | |
553 | sparc_print_register_hook (regno) | |
554 | extern void sparc_print_register_hook PARAMS ((int regno)); | |
555 | ||
556 | ||
557 | /* Optimization for storing registers to the inferior. The hook | |
558 | DO_DEFERRED_STORES | |
559 | actually executes any deferred stores. It is called any time | |
560 | we are going to proceed the child, or read its registers. | |
561 | The hook CLEAR_DEFERRED_STORES is called when we want to throw | |
562 | away the inferior process, e.g. when it dies or we kill it. | |
563 | FIXME, this does not handle remote debugging cleanly. */ | |
564 | ||
565 | extern int deferred_stores; | |
566 | #define DO_DEFERRED_STORES \ | |
567 | if (deferred_stores) \ | |
568 | target_store_registers (-2); | |
569 | #define CLEAR_DEFERRED_STORES \ | |
570 | deferred_stores = 0; | |
571 | ||
572 | /* If the current gcc for for this target does not produce correct debugging | |
573 | information for float parameters, both prototyped and unprototyped, then | |
574 | define this macro. This forces gdb to always assume that floats are | |
575 | passed as doubles and then converted in the callee. */ | |
576 | ||
577 | #define COERCE_FLOAT_TO_DOUBLE 1 | |
578 | ||
579 | /* Select the sparc disassembler */ | |
580 | ||
581 | #define TM_PRINT_INSN_MACH bfd_mach_sparc | |
582 | ||
583 | /* Arguments smaller than an int must promoted to ints when synthesizing | |
584 | function calls. */ | |
585 | ||
586 | #define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \ | |
392a587b | 587 | (sparc_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr))) |
c906108c | 588 | extern CORE_ADDR |
c5aa993b | 589 | sparc_push_arguments PARAMS ((int, struct value **, CORE_ADDR, int, CORE_ADDR)); |