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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 | 23 | |
c906108c SS |
24 | struct type; |
25 | struct value; | |
5af923b0 | 26 | struct frame_info; |
c906108c | 27 | |
5af923b0 MS |
28 | /* |
29 | * The following enums are purely for the convenience of the GDB | |
30 | * developer, when debugging GDB. | |
31 | */ | |
c906108c | 32 | |
5af923b0 MS |
33 | enum { /* Sparc general registers, for all sparc versions. */ |
34 | G0_REGNUM, G1_REGNUM, G2_REGNUM, G3_REGNUM, | |
35 | G4_REGNUM, G5_REGNUM, G6_REGNUM, G7_REGNUM, | |
36 | O0_REGNUM, O1_REGNUM, O2_REGNUM, O3_REGNUM, | |
37 | O4_REGNUM, O5_REGNUM, O6_REGNUM, O7_REGNUM, | |
38 | L0_REGNUM, L1_REGNUM, L2_REGNUM, L3_REGNUM, | |
39 | L4_REGNUM, L5_REGNUM, L6_REGNUM, L7_REGNUM, | |
40 | I0_REGNUM, I1_REGNUM, I2_REGNUM, I3_REGNUM, | |
41 | I4_REGNUM, I5_REGNUM, I6_REGNUM, I7_REGNUM, | |
42 | FP0_REGNUM /* Floating point register 0 */ | |
43 | }; | |
44 | ||
45 | enum { /* Sparc general registers, alternate names. */ | |
46 | R0_REGNUM, R1_REGNUM, R2_REGNUM, R3_REGNUM, | |
47 | R4_REGNUM, R5_REGNUM, R6_REGNUM, R7_REGNUM, | |
48 | R8_REGNUM, R9_REGNUM, R10_REGNUM, R11_REGNUM, | |
49 | R12_REGNUM, R13_REGNUM, R14_REGNUM, R15_REGNUM, | |
50 | R16_REGNUM, R17_REGNUM, R18_REGNUM, R19_REGNUM, | |
51 | R20_REGNUM, R21_REGNUM, R22_REGNUM, R23_REGNUM, | |
52 | R24_REGNUM, R25_REGNUM, R26_REGNUM, R27_REGNUM, | |
53 | R28_REGNUM, R29_REGNUM, R30_REGNUM, R31_REGNUM | |
54 | }; | |
55 | ||
56 | enum { /* Sparc32 control registers. */ | |
57 | PS_REGNUM = 65, /* PC, NPC, and Y are omitted because */ | |
58 | WIM_REGNUM = 66, /* they have different values depending on */ | |
59 | TBR_REGNUM = 67, /* 32-bit / 64-bit mode. */ | |
60 | FPS_REGNUM = 70, | |
61 | CPS_REGNUM = 71 | |
62 | }; | |
63 | ||
64 | /* v9 misc. and priv. regs */ | |
65 | ||
66 | /* Note: specifying values explicitly for documentation purposes. */ | |
67 | enum { /* Sparc64 control registers, excluding Y, PC, and NPC. */ | |
68 | CCR_REGNUM = 82, /* Condition Code Register (%xcc,%icc) */ | |
69 | FSR_REGNUM = 83, /* Floating Point State */ | |
70 | FPRS_REGNUM = 84, /* Floating Point Registers State */ | |
71 | ASI_REGNUM = 86, /* Alternate Space Identifier */ | |
72 | VER_REGNUM = 87, /* Version register */ | |
73 | TICK_REGNUM = 88, /* Tick register */ | |
74 | PIL_REGNUM = 89, /* Processor Interrupt Level */ | |
75 | PSTATE_REGNUM = 90, /* Processor State */ | |
76 | TSTATE_REGNUM = 91, /* Trap State */ | |
77 | TBA_REGNUM = 92, /* Trap Base Address */ | |
78 | TL_REGNUM = 93, /* Trap Level */ | |
79 | TT_REGNUM = 94, /* Trap Type */ | |
80 | TPC_REGNUM = 95, /* Trap pc */ | |
81 | TNPC_REGNUM = 96, /* Trap npc */ | |
82 | WSTATE_REGNUM = 97, /* Window State */ | |
83 | CWP_REGNUM = 98, /* Current Window Pointer */ | |
84 | CANSAVE_REGNUM = 99, /* Savable Windows */ | |
85 | CANRESTORE_REGNUM = 100, /* Restorable Windows */ | |
86 | CLEANWIN_REGNUM = 101, /* Clean Windows */ | |
87 | OTHERWIN_REGNUM = 102, /* Other Windows */ | |
88 | ASR16_REGNUM = 103, /* Ancillary State Registers */ | |
89 | ASR17_REGNUM = 104, | |
90 | ASR18_REGNUM = 105, | |
91 | ASR19_REGNUM = 106, | |
92 | ASR20_REGNUM = 107, | |
93 | ASR21_REGNUM = 108, | |
94 | ASR22_REGNUM = 109, | |
95 | ASR23_REGNUM = 110, | |
96 | ASR24_REGNUM = 111, | |
97 | ASR25_REGNUM = 112, | |
98 | ASR26_REGNUM = 113, | |
99 | ASR27_REGNUM = 114, | |
100 | ASR28_REGNUM = 115, | |
101 | ASR29_REGNUM = 116, | |
102 | ASR30_REGNUM = 117, | |
103 | ASR31_REGNUM = 118, | |
104 | ICC_REGNUM = 119, /* 32 bit condition codes */ | |
105 | XCC_REGNUM = 120, /* 64 bit condition codes */ | |
106 | FCC0_REGNUM = 121, /* fp cc reg 0 */ | |
107 | FCC1_REGNUM = 122, /* fp cc reg 1 */ | |
108 | FCC2_REGNUM = 123, /* fp cc reg 2 */ | |
109 | FCC3_REGNUM = 124 /* fp cc reg 3 */ | |
110 | }; | |
c906108c | 111 | |
5af923b0 MS |
112 | /* |
113 | * Make sparc target multi-archable: April 2000 | |
114 | */ | |
c906108c | 115 | |
5af923b0 MS |
116 | #if defined (GDB_MULTI_ARCH) && (GDB_MULTI_ARCH > 0) |
117 | ||
118 | /* Multi-arch definition of TARGET_IS_SPARC64, TARGET_ELF64 */ | |
119 | #undef GDB_TARGET_IS_SPARC64 | |
120 | #define GDB_TARGET_IS_SPARC64 \ | |
121 | (sparc_intreg_size () == 8) | |
122 | #undef TARGET_ELF64 | |
123 | #define TARGET_ELF64 \ | |
124 | (sparc_intreg_size () == 8) | |
125 | extern int sparc_intreg_size (void); | |
126 | #else | |
127 | ||
128 | /* Non-multi-arch: if it isn't defined, define it to zero. */ | |
129 | #ifndef GDB_TARGET_IS_SPARC64 | |
130 | #define GDB_TARGET_IS_SPARC64 0 | |
131 | #endif | |
132 | #ifndef TARGET_ELF64 | |
133 | #define TARGET_ELF64 0 | |
134 | #endif | |
135 | #endif | |
c906108c | 136 | |
5af923b0 MS |
137 | #if !defined (GDB_MULTI_ARCH) || (GDB_MULTI_ARCH == 0) |
138 | /* | |
139 | * The following defines must go away for MULTI_ARCH | |
140 | */ | |
c906108c | 141 | |
5af923b0 MS |
142 | /* Initializer for an array of names of registers. |
143 | There should be NUM_REGS strings in this initializer. */ | |
c906108c | 144 | |
5af923b0 MS |
145 | #define REGISTER_NAMES \ |
146 | { "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7", \ | |
147 | "o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7", \ | |
148 | "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7", \ | |
149 | "i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7", \ | |
150 | \ | |
151 | "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \ | |
152 | "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \ | |
153 | "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \ | |
154 | "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \ | |
155 | \ | |
156 | "y", "psr", "wim", "tbr", "pc", "npc", "fpsr", "cpsr" \ | |
157 | } | |
c906108c | 158 | |
5af923b0 | 159 | #define TARGET_BYTE_ORDER BIG_ENDIAN |
c906108c SS |
160 | |
161 | /* Offset from address of function to start of its code. | |
162 | Zero on most machines. */ | |
163 | ||
164 | #define FUNCTION_START_OFFSET 0 | |
165 | ||
c906108c SS |
166 | /* Amount PC must be decremented by after a breakpoint. |
167 | This is often the number of bytes in BREAKPOINT | |
168 | but not always. */ | |
169 | ||
170 | #define DECR_PC_AFTER_BREAK 0 | |
171 | ||
172 | /* Say how long (ordinary) registers are. This is a piece of bogosity | |
173 | used in push_word and a few other places; REGISTER_RAW_SIZE is the | |
174 | real way to know how big a register is. */ | |
175 | ||
176 | #define REGISTER_SIZE 4 | |
177 | ||
178 | /* Number of machine registers */ | |
179 | ||
180 | #define NUM_REGS 72 | |
181 | ||
c906108c SS |
182 | #define SP_REGNUM 14 /* Contains address of top of stack, \ |
183 | which is also the bottom of the frame. */ | |
c906108c | 184 | #define FP_REGNUM 30 /* Contains address of executing stack frame */ |
5af923b0 | 185 | |
c906108c | 186 | #define FP0_REGNUM 32 /* Floating point register 0 */ |
5af923b0 | 187 | |
c906108c | 188 | #define Y_REGNUM 64 /* Temp register for multiplication, etc. */ |
5af923b0 | 189 | |
c906108c | 190 | #define PC_REGNUM 68 /* Contains program counter */ |
5af923b0 | 191 | |
c5aa993b | 192 | #define NPC_REGNUM 69 /* Contains next PC */ |
5af923b0 | 193 | |
c906108c SS |
194 | |
195 | /* Total amount of space needed to store our copies of the machine's | |
196 | register state, the array `registers'. On the sparc, `registers' | |
197 | contains the ins and locals, even though they are saved on the | |
198 | stack rather than with the other registers, and this causes hair | |
5af923b0 MS |
199 | and confusion in places like pop_frame. It might be better to |
200 | remove the ins and locals from `registers', make sure that | |
201 | get_saved_register can get them from the stack (even in the | |
c906108c | 202 | innermost frame), and make this the way to access them. For the |
5af923b0 MS |
203 | frame pointer we would do that via TARGET_READ_FP. On the other |
204 | hand, that is likely to be confusing or worse for flat frames. */ | |
c906108c SS |
205 | |
206 | #define REGISTER_BYTES (32*4+32*4+8*4) | |
207 | ||
208 | /* Index within `registers' of the first byte of the space for | |
209 | register N. */ | |
c906108c | 210 | |
5af923b0 | 211 | #define REGISTER_BYTE(N) ((N)*4) |
c906108c | 212 | |
5af923b0 MS |
213 | /* Number of bytes of storage in the actual machine representation for |
214 | register N. */ | |
c906108c | 215 | |
5af923b0 | 216 | /* On the SPARC, all regs are 4 bytes (except Sparc64, where they're 8). */ |
c906108c SS |
217 | |
218 | #define REGISTER_RAW_SIZE(N) (4) | |
219 | ||
220 | /* Number of bytes of storage in the program's representation | |
221 | for register N. */ | |
222 | ||
5af923b0 | 223 | /* On the SPARC, all regs are 4 bytes (except Sparc64, where they're 8). */ |
c906108c SS |
224 | |
225 | #define REGISTER_VIRTUAL_SIZE(N) (4) | |
226 | ||
227 | /* Largest value REGISTER_RAW_SIZE can have. */ | |
228 | ||
229 | #define MAX_REGISTER_RAW_SIZE 8 | |
230 | ||
231 | /* Largest value REGISTER_VIRTUAL_SIZE can have. */ | |
232 | ||
233 | #define MAX_REGISTER_VIRTUAL_SIZE 8 | |
234 | ||
235 | /* Return the GDB type object for the "standard" data type | |
236 | of data in register N. */ | |
237 | ||
238 | #define REGISTER_VIRTUAL_TYPE(N) \ | |
5af923b0 MS |
239 | ((N) < 32 ? builtin_type_int : (N) < 64 ? builtin_type_float : \ |
240 | builtin_type_int) | |
c906108c | 241 | |
5af923b0 MS |
242 | /* Sun /bin/cc gets this right as of SunOS 4.1.x. We need to define |
243 | BELIEVE_PCC_PROMOTION to get this right now that the code which | |
244 | detects gcc2_compiled. is broken. This loses for SunOS 4.0.x and | |
245 | earlier. */ | |
c906108c | 246 | |
5af923b0 | 247 | #define BELIEVE_PCC_PROMOTION 1 |
c906108c | 248 | |
5af923b0 MS |
249 | /* Advance PC across any function entry prologue instructions |
250 | to reach some "real" code. SKIP_PROLOGUE_FRAMELESS_P advances | |
251 | the PC past some of the prologue, but stops as soon as it | |
252 | knows that the function has a frame. Its result is equal | |
253 | to its input PC if the function is frameless, unequal otherwise. */ | |
c906108c | 254 | |
5af923b0 | 255 | #define SKIP_PROLOGUE(PC) sparc_skip_prologue (PC, 0) |
c906108c | 256 | |
5af923b0 MS |
257 | /* Immediately after a function call, return the saved pc. |
258 | Can't go through the frames for this because on some machines | |
259 | the new frame is not set up until the new function executes | |
260 | some instructions. */ | |
c906108c | 261 | |
5af923b0 MS |
262 | #define SAVED_PC_AFTER_CALL(FRAME) PC_ADJUST (read_register (RP_REGNUM)) |
263 | ||
264 | /* Stack grows downward. */ | |
265 | ||
266 | #define INNER_THAN(LHS,RHS) ((LHS) < (RHS)) | |
267 | ||
268 | /* Write into appropriate registers a function return value of type | |
269 | TYPE, given in virtual format. */ | |
c906108c | 270 | |
5af923b0 MS |
271 | #define STORE_RETURN_VALUE(TYPE, VALBUF) \ |
272 | sparc_store_return_value (TYPE, VALBUF) | |
a14ed312 | 273 | extern void sparc_store_return_value (struct type *, char *); |
c906108c SS |
274 | |
275 | /* Extract from an array REGBUF containing the (raw) register state | |
276 | the address in which a function should return its structure value, | |
277 | as a CORE_ADDR (or an expression that can be used as one). */ | |
278 | ||
279 | #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \ | |
5af923b0 | 280 | sparc_extract_struct_value_address (REGBUF) |
c906108c | 281 | |
a14ed312 | 282 | extern CORE_ADDR sparc_extract_struct_value_address (char *); |
5af923b0 MS |
283 | |
284 | /* If the current gcc for for this target does not produce correct | |
285 | debugging information for float parameters, both prototyped and | |
286 | unprototyped, then define this macro. This forces gdb to always | |
287 | assume that floats are passed as doubles and then converted in the | |
288 | callee. */ | |
289 | ||
290 | #define COERCE_FLOAT_TO_DOUBLE(FORMAL, ACTUAL) (1) | |
291 | ||
292 | /* Stack must be aligned on 64-bit boundaries when synthesizing | |
293 | function calls (128-bit for sparc64). */ | |
294 | ||
295 | #define STACK_ALIGN(ADDR) sparc32_stack_align (ADDR) | |
296 | extern CORE_ADDR sparc32_stack_align (CORE_ADDR addr); | |
297 | ||
298 | /* Floating point is IEEE compatible. */ | |
299 | #define IEEE_FLOAT (1) | |
300 | ||
301 | /* The Sparc returns long doubles on the stack. */ | |
302 | ||
303 | #define RETURN_VALUE_ON_STACK(TYPE) \ | |
304 | (TYPE_CODE(TYPE) == TYPE_CODE_FLT \ | |
305 | && TYPE_LENGTH(TYPE) > 8) | |
306 | ||
307 | /* When passing a structure to a function, Sun cc passes the address | |
308 | not the structure itself. It (under SunOS4) creates two symbols, | |
309 | which we need to combine to a LOC_REGPARM. Gcc version two (as of | |
310 | 1.92) behaves like sun cc. REG_STRUCT_HAS_ADDR is smart enough to | |
311 | distinguish between Sun cc, gcc version 1 and gcc version 2. */ | |
312 | ||
313 | #define REG_STRUCT_HAS_ADDR(GCC_P, TYPE) \ | |
314 | sparc_reg_struct_has_addr (GCC_P, TYPE) | |
315 | extern int sparc_reg_struct_has_addr (int, struct type *); | |
316 | ||
317 | #endif /* GDB_MULTI_ARCH */ | |
318 | ||
319 | #if defined (GDB_MULTI_ARCH) && (GDB_MULTI_ARCH > 0) | |
320 | /* | |
321 | * The following defines should ONLY appear for MULTI_ARCH. | |
322 | */ | |
323 | ||
324 | /* Multi-arch the nPC and Y registers. */ | |
325 | #define Y_REGNUM (sparc_y_regnum ()) | |
326 | extern int sparc_npc_regnum (void); | |
327 | extern int sparc_y_regnum (void); | |
328 | ||
329 | #endif /* GDB_MULTI_ARCH */ | |
330 | ||
331 | /* On the Sun 4 under SunOS, the compile will leave a fake insn which | |
332 | encodes the structure size being returned. If we detect such | |
333 | a fake insn, step past it. */ | |
334 | ||
335 | #define PC_ADJUST(PC) sparc_pc_adjust (PC) | |
a14ed312 | 336 | extern CORE_ADDR sparc_pc_adjust (CORE_ADDR); |
5af923b0 MS |
337 | |
338 | /* Advance PC across any function entry prologue instructions to reach | |
339 | some "real" code. SKIP_PROLOGUE_FRAMELESS_P advances the PC past | |
340 | some of the prologue, but stops as soon as it knows that the | |
341 | function has a frame. Its result is equal to its input PC if the | |
342 | function is frameless, unequal otherwise. */ | |
343 | ||
344 | #define SKIP_PROLOGUE_FRAMELESS_P(PC) sparc_skip_prologue (PC, 1) | |
a14ed312 | 345 | extern CORE_ADDR sparc_skip_prologue (CORE_ADDR, int); |
5af923b0 MS |
346 | |
347 | /* If an argument is declared "register", Sun cc will keep it in a register, | |
348 | never saving it onto the stack. So we better not believe the "p" symbol | |
349 | descriptor stab. */ | |
350 | ||
351 | #define USE_REGISTER_NOT_ARG | |
352 | ||
353 | /* For acc, there's no need to correct LBRAC entries by guessing how | |
354 | they should work. In fact, this is harmful because the LBRAC | |
355 | entries now all appear at the end of the function, not intermixed | |
356 | with the SLINE entries. n_opt_found detects acc for Solaris binaries; | |
357 | function_stab_type detects acc for SunOS4 binaries. | |
358 | ||
359 | For binary from SunOS4 /bin/cc, need to correct LBRAC's. | |
360 | ||
361 | For gcc, like acc, don't correct. */ | |
362 | ||
363 | #define SUN_FIXED_LBRAC_BUG \ | |
364 | (n_opt_found \ | |
365 | || function_stab_type == N_STSYM \ | |
366 | || function_stab_type == N_GSYM \ | |
367 | || processing_gcc_compilation) | |
368 | ||
369 | /* Do variables in the debug stabs occur after the N_LBRAC or before it? | |
370 | acc: after, gcc: before, SunOS4 /bin/cc: before. */ | |
371 | ||
372 | #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) \ | |
373 | (!(gcc_p) \ | |
374 | && (n_opt_found \ | |
375 | || function_stab_type == N_STSYM \ | |
376 | || function_stab_type == N_GSYM)) | |
377 | ||
378 | /* Sequence of bytes for breakpoint instruction (ta 1). */ | |
379 | ||
380 | #define BREAKPOINT {0x91, 0xd0, 0x20, 0x01} | |
381 | ||
382 | /* Register numbers of various important registers. | |
383 | Note that some of these values are "real" register numbers, | |
384 | and correspond to the general registers of the machine, | |
385 | and some are "phony" register numbers which are too large | |
386 | to be actual register numbers as far as the user is concerned | |
387 | but do serve to get the desired values when passed to read_register. */ | |
388 | ||
389 | #define G0_REGNUM 0 /* %g0 */ | |
390 | #define G1_REGNUM 1 /* %g1 */ | |
391 | #define O0_REGNUM 8 /* %o0 */ | |
392 | #define RP_REGNUM 15 /* Contains return address value, *before* \ | |
393 | any windows get switched. */ | |
394 | #define O7_REGNUM 15 /* Last local reg not saved on stack frame */ | |
395 | #define L0_REGNUM 16 /* First local reg that's saved on stack frame | |
396 | rather than in machine registers */ | |
397 | #define I0_REGNUM 24 /* %i0 */ | |
398 | #define I7_REGNUM 31 /* Last local reg saved on stack frame */ | |
399 | #define PS_REGNUM 65 /* Contains processor status */ | |
400 | #define PS_FLAG_CARRY 0x100000 /* Carry bit in PS */ | |
401 | #define WIM_REGNUM 66 /* Window Invalid Mask (not really supported) */ | |
402 | #define TBR_REGNUM 67 /* Trap Base Register (not really supported) */ | |
403 | #define FPS_REGNUM 70 /* Floating point status register */ | |
404 | #define CPS_REGNUM 71 /* Coprocessor status register */ | |
405 | ||
406 | /* Writing to %g0 is a noop (not an error or exception or anything like | |
407 | that, however). */ | |
408 | ||
409 | #define CANNOT_STORE_REGISTER(regno) ((regno) == G0_REGNUM) | |
410 | ||
411 | /* | |
412 | * FRAME_CHAIN and FRAME_INFO definitions, collected here for convenience. | |
413 | */ | |
414 | ||
415 | #if !defined (GDB_MULTI_ARCH) || (GDB_MULTI_ARCH == 0) | |
416 | /* | |
417 | * The following defines must go away for MULTI_ARCH. | |
418 | */ | |
c5aa993b | 419 | |
c906108c SS |
420 | /* Describe the pointer in each stack frame to the previous stack frame |
421 | (its caller). */ | |
422 | ||
423 | /* FRAME_CHAIN takes a frame's nominal address | |
424 | and produces the frame's chain-pointer. */ | |
425 | ||
426 | /* In the case of the Sun 4, the frame-chain's nominal address | |
427 | is held in the frame pointer register. | |
428 | ||
429 | On the Sun4, the frame (in %fp) is %sp for the previous frame. | |
430 | From the previous frame's %sp, we can find the previous frame's | |
431 | %fp: it is in the save area just above the previous frame's %sp. | |
432 | ||
433 | If we are setting up an arbitrary frame, we'll need to know where | |
434 | it ends. Hence the following. This part of the frame cache | |
435 | structure should be checked before it is assumed that this frame's | |
436 | bottom is in the stack pointer. | |
437 | ||
438 | If there isn't a frame below this one, the bottom of this frame is | |
439 | in the stack pointer. | |
440 | ||
441 | If there is a frame below this one, and the frame pointers are | |
442 | identical, it's a leaf frame and the bottoms are the same also. | |
443 | ||
444 | Otherwise the bottom of this frame is the top of the next frame. | |
445 | ||
446 | The bottom field is misnamed, since it might imply that memory from | |
447 | bottom to frame contains this frame. That need not be true if | |
448 | stack frames are allocated in different segments (e.g. some on a | |
449 | stack, some on a heap in the data segment). | |
450 | ||
451 | GCC 2.6 and later can generate ``flat register window'' code that | |
452 | makes frames by explicitly saving those registers that need to be | |
5af923b0 MS |
453 | saved. %i7 is used as the frame pointer, and the frame is laid out |
454 | so that flat and non-flat calls can be intermixed freely within a | |
455 | program. Unfortunately for GDB, this means it must detect and | |
456 | record the flatness of frames. | |
c906108c SS |
457 | |
458 | Since the prologue in a flat frame also tells us where fp and pc | |
459 | have been stashed (the frame is of variable size, so their location | |
460 | is not fixed), it's convenient to record them in the frame info. */ | |
461 | ||
5af923b0 MS |
462 | #define EXTRA_FRAME_INFO \ |
463 | CORE_ADDR bottom; \ | |
464 | int in_prologue; \ | |
465 | int flat; \ | |
c906108c | 466 | /* Following fields only relevant for flat frames. */ \ |
5af923b0 MS |
467 | CORE_ADDR pc_addr; \ |
468 | CORE_ADDR fp_addr; \ | |
c906108c SS |
469 | /* Add this to ->frame to get the value of the stack pointer at the */ \ |
470 | /* time of the register saves. */ \ | |
471 | int sp_offset; | |
472 | ||
5af923b0 MS |
473 | /* We need to override GET_SAVED_REGISTER so that we can deal with the way |
474 | outs change into ins in different frames. HAVE_REGISTER_WINDOWS can't | |
475 | deal with this case and also handle flat frames at the same time. */ | |
c906108c | 476 | |
a14ed312 KB |
477 | void sparc_get_saved_register (char *raw_buffer, |
478 | int *optimized, | |
479 | CORE_ADDR * addrp, | |
480 | struct frame_info *frame, | |
481 | int regnum, enum lval_type *lvalp); | |
c906108c | 482 | |
5af923b0 MS |
483 | #define GET_SAVED_REGISTER(RAW_BUFFER, OPTIMIZED, ADDRP, FRAME, REGNUM, LVAL) \ |
484 | sparc_get_saved_register (RAW_BUFFER, OPTIMIZED, ADDRP, \ | |
485 | FRAME, REGNUM, LVAL) | |
c906108c | 486 | |
5af923b0 | 487 | #define FRAME_INIT_SAVED_REGS(FP) /*no-op */ |
c906108c | 488 | |
5af923b0 MS |
489 | #define INIT_EXTRA_FRAME_INFO(FROMLEAF, FCI) \ |
490 | sparc_init_extra_frame_info (FROMLEAF, FCI) | |
a14ed312 | 491 | extern void sparc_init_extra_frame_info (int, struct frame_info *); |
c906108c | 492 | |
5af923b0 | 493 | #define FRAME_CHAIN(THISFRAME) (sparc_frame_chain (THISFRAME)) |
a14ed312 | 494 | extern CORE_ADDR sparc_frame_chain (struct frame_info *); |
c906108c SS |
495 | |
496 | /* A macro that tells us whether the function invocation represented | |
497 | by FI does not have a frame on the stack associated with it. If it | |
498 | does not, FRAMELESS is set to 1, else 0. */ | |
c906108c | 499 | |
5af923b0 MS |
500 | #define FRAMELESS_FUNCTION_INVOCATION(FI) \ |
501 | frameless_look_for_prologue (FI) | |
c906108c SS |
502 | |
503 | /* Where is the PC for a specific frame */ | |
504 | ||
505 | #define FRAME_SAVED_PC(FRAME) sparc_frame_saved_pc (FRAME) | |
a14ed312 | 506 | extern CORE_ADDR sparc_frame_saved_pc (struct frame_info *); |
c906108c SS |
507 | |
508 | /* If the argument is on the stack, it will be here. */ | |
5af923b0 | 509 | #define FRAME_ARGS_ADDRESS(FI) ((FI)->frame) |
c906108c | 510 | |
5af923b0 | 511 | #define FRAME_LOCALS_ADDRESS(FI) ((FI)->frame) |
c906108c SS |
512 | |
513 | /* Set VAL to the number of args passed to frame described by FI. | |
514 | Can set VAL to -1, meaning no way to tell. */ | |
515 | ||
516 | /* We can't tell how many args there are | |
517 | now that the C compiler delays popping them. */ | |
5af923b0 | 518 | #define FRAME_NUM_ARGS(FI) (-1) |
c906108c SS |
519 | |
520 | /* Return number of bytes at start of arglist that are not really args. */ | |
521 | ||
522 | #define FRAME_ARGS_SKIP 68 | |
5af923b0 MS |
523 | |
524 | #endif /* GDB_MULTI_ARCH */ | |
525 | ||
526 | #define PRINT_EXTRA_FRAME_INFO(FI) \ | |
527 | sparc_print_extra_frame_info (FI) | |
528 | extern void sparc_print_extra_frame_info (struct frame_info *); | |
529 | ||
530 | /* INIT_EXTRA_FRAME_INFO needs the PC to detect flat frames. */ | |
531 | ||
532 | #define INIT_FRAME_PC(FROMLEAF, PREV) /* nothing */ | |
533 | #define INIT_FRAME_PC_FIRST(FROMLEAF, PREV) \ | |
534 | (PREV)->pc = ((FROMLEAF) ? SAVED_PC_AFTER_CALL ((PREV)->next) : \ | |
535 | (PREV)->next ? FRAME_SAVED_PC ((PREV)->next) : read_pc ()); | |
536 | ||
537 | /* Define other aspects of the stack frame. */ | |
538 | ||
539 | /* The location of I0 w.r.t SP. This is actually dependent on how the | |
540 | system's window overflow/underflow routines are written. Most | |
541 | vendors save the L regs followed by the I regs (at the higher | |
542 | address). Some vendors get it wrong. */ | |
543 | ||
544 | #define FRAME_SAVED_L0 0 | |
545 | #define FRAME_SAVED_I0 (8 * REGISTER_RAW_SIZE (L0_REGNUM)) | |
546 | ||
547 | #define FRAME_STRUCT_ARGS_ADDRESS(FI) ((FI)->frame) | |
548 | ||
c906108c SS |
549 | /* Things needed for making the inferior call functions. */ |
550 | /* | |
551 | * First of all, let me give my opinion of what the DUMMY_FRAME | |
552 | * actually looks like. | |
553 | * | |
554 | * | | | |
555 | * | | | |
556 | * + - - - - - - - - - - - - - - - - +<-- fp (level 0) | |
557 | * | | | |
558 | * | | | |
559 | * | | | |
560 | * | | | |
561 | * | Frame of innermost program | | |
562 | * | function | | |
563 | * | | | |
564 | * | | | |
565 | * | | | |
566 | * | | | |
567 | * | | | |
568 | * |---------------------------------|<-- sp (level 0), fp (c) | |
569 | * | | | |
570 | * DUMMY | fp0-31 | | |
571 | * | | | |
572 | * | ------ |<-- fp - 0x80 | |
573 | * FRAME | g0-7 |<-- fp - 0xa0 | |
574 | * | i0-7 |<-- fp - 0xc0 | |
575 | * | other |<-- fp - 0xe0 | |
576 | * | ? | | |
577 | * | ? | | |
578 | * |---------------------------------|<-- sp' = fp - 0x140 | |
579 | * | | | |
580 | * xcution start | | | |
581 | * sp' + 0x94 -->| CALL_DUMMY (x code) | | |
582 | * | | | |
583 | * | | | |
584 | * |---------------------------------|<-- sp'' = fp - 0x200 | |
585 | * | align sp to 8 byte boundary | | |
586 | * | ==> args to fn <== | | |
587 | * Room for | | | |
588 | * i & l's + agg | CALL_DUMMY_STACK_ADJUST = 0x0x44| | |
589 | * |---------------------------------|<-- final sp (variable) | |
590 | * | | | |
591 | * | Where function called will | | |
592 | * | build frame. | | |
593 | * | | | |
594 | * | | | |
595 | * | |
596 | * I understand everything in this picture except what the space | |
597 | * between fp - 0xe0 and fp - 0x140 is used for. Oh, and I don't | |
598 | * understand why there's a large chunk of CALL_DUMMY that never gets | |
599 | * executed (its function is superceeded by PUSH_DUMMY_FRAME; they | |
600 | * are designed to do the same thing). | |
601 | * | |
602 | * PUSH_DUMMY_FRAME saves the registers above sp' and pushes the | |
603 | * register file stack down one. | |
604 | * | |
605 | * call_function then writes CALL_DUMMY, pushes the args onto the | |
606 | * stack, and adjusts the stack pointer. | |
607 | * | |
608 | * run_stack_dummy then starts execution (in the middle of | |
609 | * CALL_DUMMY, as directed by call_function). | |
610 | */ | |
611 | ||
c906108c SS |
612 | #ifndef CALL_DUMMY |
613 | /* This sequence of words is the instructions | |
614 | ||
5af923b0 MS |
615 | 00: bc 10 00 01 mov %g1, %fp |
616 | 04: 9d e3 80 00 save %sp, %g0, %sp | |
617 | 08: bc 10 00 02 mov %g2, %fp | |
618 | 0c: be 10 00 03 mov %g3, %i7 | |
c5aa993b JM |
619 | 10: da 03 a0 58 ld [ %sp + 0x58 ], %o5 |
620 | 14: d8 03 a0 54 ld [ %sp + 0x54 ], %o4 | |
621 | 18: d6 03 a0 50 ld [ %sp + 0x50 ], %o3 | |
622 | 1c: d4 03 a0 4c ld [ %sp + 0x4c ], %o2 | |
623 | 20: d2 03 a0 48 ld [ %sp + 0x48 ], %o1 | |
624 | 24: 40 00 00 00 call <fun> | |
625 | 28: d0 03 a0 44 ld [ %sp + 0x44 ], %o0 | |
626 | 2c: 01 00 00 00 nop | |
627 | 30: 91 d0 20 01 ta 1 | |
628 | 34: 01 00 00 00 nop | |
c906108c SS |
629 | |
630 | NOTES: | |
c5aa993b JM |
631 | * the first four instructions are necessary only on the simulator. |
632 | * this is a multiple of 8 (not only 4) bytes. | |
633 | * the `call' insn is a relative, not an absolute call. | |
634 | * the `nop' at the end is needed to keep the trap from | |
5af923b0 MS |
635 | clobbering things (if NPC pointed to garbage instead). |
636 | */ | |
637 | ||
638 | #if !defined (GDB_MULTI_ARCH) || (GDB_MULTI_ARCH == 0) | |
639 | /* | |
640 | * The following defines must go away for MULTI_ARCH. | |
c5aa993b | 641 | */ |
c906108c SS |
642 | |
643 | #define CALL_DUMMY { 0xbc100001, 0x9de38000, 0xbc100002, 0xbe100003, \ | |
644 | 0xda03a058, 0xd803a054, 0xd603a050, 0xd403a04c, \ | |
645 | 0xd203a048, 0x40000000, 0xd003a044, 0x01000000, \ | |
646 | 0x91d02001, 0x01000000 } | |
647 | ||
648 | ||
649 | /* Size of the call dummy in bytes. */ | |
650 | ||
651 | #define CALL_DUMMY_LENGTH 0x38 | |
652 | ||
653 | /* Offset within call dummy of first instruction to execute. */ | |
654 | ||
655 | #define CALL_DUMMY_START_OFFSET 0 | |
656 | ||
657 | /* Offset within CALL_DUMMY of the 'call' instruction. */ | |
658 | ||
659 | #define CALL_DUMMY_CALL_OFFSET (CALL_DUMMY_START_OFFSET + 0x24) | |
660 | ||
5af923b0 | 661 | /* Offset within CALL_DUMMY of the 'ta 1' trap instruction. */ |
c906108c SS |
662 | |
663 | #define CALL_DUMMY_BREAKPOINT_OFFSET (CALL_DUMMY_START_OFFSET + 0x30) | |
664 | ||
665 | #define CALL_DUMMY_STACK_ADJUST 68 | |
666 | ||
5af923b0 MS |
667 | /* Call dummy method (eg. on stack, at entry point, etc.) */ |
668 | ||
669 | #define CALL_DUMMY_LOCATION ON_STACK | |
670 | ||
671 | /* Method for detecting dummy frames. */ | |
672 | ||
673 | #define PC_IN_CALL_DUMMY(PC, SP, FRAME_ADDRESS) \ | |
674 | pc_in_call_dummy_on_stack (PC, SP, FRAME_ADDRESS) | |
675 | ||
676 | #endif /* GDB_MULTI_ARCH */ | |
677 | ||
678 | #endif /* CALL_DUMMY */ | |
679 | ||
680 | #if !defined (GDB_MULTI_ARCH) || (GDB_MULTI_ARCH == 0) | |
681 | /* | |
682 | * The following defines must go away for MULTI_ARCH. | |
683 | */ | |
684 | ||
c906108c SS |
685 | /* Insert the specified number of args and function address |
686 | into a call sequence of the above form stored at DUMMYNAME. */ | |
687 | ||
5af923b0 MS |
688 | #define FIX_CALL_DUMMY(DUMMYNAME, PC, FUN, NARGS, ARGS, TYPE, GCC_P) \ |
689 | sparc_fix_call_dummy (DUMMYNAME, PC, FUN, TYPE, GCC_P) | |
a14ed312 KB |
690 | void sparc_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, |
691 | struct type *value_type, int using_gcc); | |
c906108c | 692 | |
5af923b0 MS |
693 | /* Arguments smaller than an int must be promoted to ints when |
694 | synthesizing function calls. */ | |
695 | ||
696 | /* Push an empty stack frame, to record the current PC, etc. */ | |
697 | ||
698 | #define PUSH_DUMMY_FRAME sparc_push_dummy_frame () | |
699 | #define POP_FRAME sparc_pop_frame () | |
700 | ||
a14ed312 KB |
701 | void sparc_push_dummy_frame (void); |
702 | void sparc_pop_frame (void); | |
5af923b0 MS |
703 | |
704 | #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \ | |
705 | sparc32_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) | |
706 | ||
707 | extern CORE_ADDR | |
a14ed312 | 708 | sparc32_push_arguments (int, struct value **, CORE_ADDR, int, CORE_ADDR); |
5af923b0 MS |
709 | |
710 | /* Store the address of the place in which to copy the structure the | |
711 | subroutine will return. This is called from call_function_by_hand. | |
712 | The ultimate mystery is, tho, what is the value "16"? */ | |
713 | ||
714 | #define STORE_STRUCT_RETURN(ADDR, SP) \ | |
715 | { char val[4]; \ | |
716 | store_unsigned_integer (val, 4, (ADDR)); \ | |
717 | write_memory ((SP)+(16*4), val, 4); } | |
718 | ||
719 | /* Default definition of USE_STRUCT_CONVENTION. */ | |
720 | ||
721 | #ifndef USE_STRUCT_CONVENTION | |
722 | #define USE_STRUCT_CONVENTION(GCC_P, TYPE) \ | |
723 | generic_use_struct_convention (GCC_P, TYPE) | |
724 | #endif | |
725 | ||
726 | /* Extract from an array REGBUF containing the (raw) register state a | |
727 | function return value of type TYPE, and copy that, in virtual | |
728 | format, into VALBUF. */ | |
729 | ||
730 | #define EXTRACT_RETURN_VALUE(TYPE, REGBUF, VALBUF) \ | |
731 | sparc32_extract_return_value (TYPE, REGBUF, VALBUF) | |
a14ed312 | 732 | extern void sparc32_extract_return_value (struct type *, char[], char *); |
5af923b0 MS |
733 | |
734 | #endif /* GDB_MULTI_ARCH */ | |
c906108c | 735 | |
c906108c SS |
736 | \f |
737 | /* Sparc has no reliable single step ptrace call */ | |
738 | ||
739 | #define SOFTWARE_SINGLE_STEP_P 1 | |
a14ed312 | 740 | extern void sparc_software_single_step (unsigned int, int); |
c906108c SS |
741 | #define SOFTWARE_SINGLE_STEP(sig,bp_p) sparc_software_single_step (sig,bp_p) |
742 | ||
743 | /* We need more arguments in a frame specification for the | |
744 | "frame" or "info frame" command. */ | |
745 | ||
746 | #define SETUP_ARBITRARY_FRAME(argc, argv) setup_arbitrary_frame (argc, argv) | |
a14ed312 | 747 | extern struct frame_info *setup_arbitrary_frame (int, CORE_ADDR *); |
c906108c SS |
748 | |
749 | /* To print every pair of float registers as a double, we use this hook. | |
750 | We also print the condition code registers in a readable format | |
751 | (FIXME: can expand this to all control regs). */ | |
752 | ||
753 | #undef PRINT_REGISTER_HOOK | |
754 | #define PRINT_REGISTER_HOOK(regno) \ | |
755 | sparc_print_register_hook (regno) | |
a14ed312 | 756 | extern void sparc_print_register_hook (int regno); |
c906108c | 757 | |
c906108c SS |
758 | /* Optimization for storing registers to the inferior. The hook |
759 | DO_DEFERRED_STORES | |
760 | actually executes any deferred stores. It is called any time | |
761 | we are going to proceed the child, or read its registers. | |
762 | The hook CLEAR_DEFERRED_STORES is called when we want to throw | |
763 | away the inferior process, e.g. when it dies or we kill it. | |
764 | FIXME, this does not handle remote debugging cleanly. */ | |
765 | ||
766 | extern int deferred_stores; | |
767 | #define DO_DEFERRED_STORES \ | |
768 | if (deferred_stores) \ | |
769 | target_store_registers (-2); | |
770 | #define CLEAR_DEFERRED_STORES \ | |
771 | deferred_stores = 0; | |
772 | ||
c906108c SS |
773 | /* Select the sparc disassembler */ |
774 | ||
775 | #define TM_PRINT_INSN_MACH bfd_mach_sparc | |
776 |