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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. | |
b6ba6518 KB |
3 | Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
4 | 1998, 1999, 2000 | |
c906108c SS |
5 | Free Software Foundation, Inc. |
6 | Contributed by Michael Tiemann (tiemann@mcc.com) | |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b JM |
20 | You should have received a copy of the GNU General Public License |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | Boston, MA 02111-1307, USA. */ | |
c906108c | 24 | |
f88e2c52 AC |
25 | #include "regcache.h" |
26 | ||
c906108c SS |
27 | struct type; |
28 | struct value; | |
5af923b0 | 29 | struct frame_info; |
c906108c | 30 | |
5af923b0 MS |
31 | /* |
32 | * The following enums are purely for the convenience of the GDB | |
33 | * developer, when debugging GDB. | |
34 | */ | |
c906108c | 35 | |
5af923b0 MS |
36 | enum { /* Sparc general registers, for all sparc versions. */ |
37 | G0_REGNUM, G1_REGNUM, G2_REGNUM, G3_REGNUM, | |
38 | G4_REGNUM, G5_REGNUM, G6_REGNUM, G7_REGNUM, | |
39 | O0_REGNUM, O1_REGNUM, O2_REGNUM, O3_REGNUM, | |
40 | O4_REGNUM, O5_REGNUM, O6_REGNUM, O7_REGNUM, | |
41 | L0_REGNUM, L1_REGNUM, L2_REGNUM, L3_REGNUM, | |
42 | L4_REGNUM, L5_REGNUM, L6_REGNUM, L7_REGNUM, | |
43 | I0_REGNUM, I1_REGNUM, I2_REGNUM, I3_REGNUM, | |
44 | I4_REGNUM, I5_REGNUM, I6_REGNUM, I7_REGNUM, | |
45 | FP0_REGNUM /* Floating point register 0 */ | |
46 | }; | |
47 | ||
48 | enum { /* Sparc general registers, alternate names. */ | |
49 | R0_REGNUM, R1_REGNUM, R2_REGNUM, R3_REGNUM, | |
50 | R4_REGNUM, R5_REGNUM, R6_REGNUM, R7_REGNUM, | |
51 | R8_REGNUM, R9_REGNUM, R10_REGNUM, R11_REGNUM, | |
52 | R12_REGNUM, R13_REGNUM, R14_REGNUM, R15_REGNUM, | |
53 | R16_REGNUM, R17_REGNUM, R18_REGNUM, R19_REGNUM, | |
54 | R20_REGNUM, R21_REGNUM, R22_REGNUM, R23_REGNUM, | |
55 | R24_REGNUM, R25_REGNUM, R26_REGNUM, R27_REGNUM, | |
56 | R28_REGNUM, R29_REGNUM, R30_REGNUM, R31_REGNUM | |
57 | }; | |
58 | ||
59 | enum { /* Sparc32 control registers. */ | |
60 | PS_REGNUM = 65, /* PC, NPC, and Y are omitted because */ | |
61 | WIM_REGNUM = 66, /* they have different values depending on */ | |
62 | TBR_REGNUM = 67, /* 32-bit / 64-bit mode. */ | |
63 | FPS_REGNUM = 70, | |
64 | CPS_REGNUM = 71 | |
65 | }; | |
66 | ||
67 | /* v9 misc. and priv. regs */ | |
68 | ||
69 | /* Note: specifying values explicitly for documentation purposes. */ | |
70 | enum { /* Sparc64 control registers, excluding Y, PC, and NPC. */ | |
71 | CCR_REGNUM = 82, /* Condition Code Register (%xcc,%icc) */ | |
72 | FSR_REGNUM = 83, /* Floating Point State */ | |
73 | FPRS_REGNUM = 84, /* Floating Point Registers State */ | |
74 | ASI_REGNUM = 86, /* Alternate Space Identifier */ | |
75 | VER_REGNUM = 87, /* Version register */ | |
76 | TICK_REGNUM = 88, /* Tick register */ | |
77 | PIL_REGNUM = 89, /* Processor Interrupt Level */ | |
78 | PSTATE_REGNUM = 90, /* Processor State */ | |
79 | TSTATE_REGNUM = 91, /* Trap State */ | |
80 | TBA_REGNUM = 92, /* Trap Base Address */ | |
81 | TL_REGNUM = 93, /* Trap Level */ | |
82 | TT_REGNUM = 94, /* Trap Type */ | |
83 | TPC_REGNUM = 95, /* Trap pc */ | |
84 | TNPC_REGNUM = 96, /* Trap npc */ | |
85 | WSTATE_REGNUM = 97, /* Window State */ | |
86 | CWP_REGNUM = 98, /* Current Window Pointer */ | |
87 | CANSAVE_REGNUM = 99, /* Savable Windows */ | |
88 | CANRESTORE_REGNUM = 100, /* Restorable Windows */ | |
89 | CLEANWIN_REGNUM = 101, /* Clean Windows */ | |
90 | OTHERWIN_REGNUM = 102, /* Other Windows */ | |
91 | ASR16_REGNUM = 103, /* Ancillary State Registers */ | |
92 | ASR17_REGNUM = 104, | |
93 | ASR18_REGNUM = 105, | |
94 | ASR19_REGNUM = 106, | |
95 | ASR20_REGNUM = 107, | |
96 | ASR21_REGNUM = 108, | |
97 | ASR22_REGNUM = 109, | |
98 | ASR23_REGNUM = 110, | |
99 | ASR24_REGNUM = 111, | |
100 | ASR25_REGNUM = 112, | |
101 | ASR26_REGNUM = 113, | |
102 | ASR27_REGNUM = 114, | |
103 | ASR28_REGNUM = 115, | |
104 | ASR29_REGNUM = 116, | |
105 | ASR30_REGNUM = 117, | |
106 | ASR31_REGNUM = 118, | |
107 | ICC_REGNUM = 119, /* 32 bit condition codes */ | |
108 | XCC_REGNUM = 120, /* 64 bit condition codes */ | |
109 | FCC0_REGNUM = 121, /* fp cc reg 0 */ | |
110 | FCC1_REGNUM = 122, /* fp cc reg 1 */ | |
111 | FCC2_REGNUM = 123, /* fp cc reg 2 */ | |
112 | FCC3_REGNUM = 124 /* fp cc reg 3 */ | |
113 | }; | |
c906108c | 114 | |
5af923b0 MS |
115 | /* |
116 | * Make sparc target multi-archable: April 2000 | |
117 | */ | |
c906108c | 118 | |
5af923b0 MS |
119 | #if defined (GDB_MULTI_ARCH) && (GDB_MULTI_ARCH > 0) |
120 | ||
121 | /* Multi-arch definition of TARGET_IS_SPARC64, TARGET_ELF64 */ | |
122 | #undef GDB_TARGET_IS_SPARC64 | |
123 | #define GDB_TARGET_IS_SPARC64 \ | |
124 | (sparc_intreg_size () == 8) | |
125 | #undef TARGET_ELF64 | |
126 | #define TARGET_ELF64 \ | |
127 | (sparc_intreg_size () == 8) | |
128 | extern int sparc_intreg_size (void); | |
129 | #else | |
130 | ||
131 | /* Non-multi-arch: if it isn't defined, define it to zero. */ | |
132 | #ifndef GDB_TARGET_IS_SPARC64 | |
133 | #define GDB_TARGET_IS_SPARC64 0 | |
134 | #endif | |
135 | #ifndef TARGET_ELF64 | |
136 | #define TARGET_ELF64 0 | |
137 | #endif | |
138 | #endif | |
c906108c | 139 | |
5af923b0 MS |
140 | #if !defined (GDB_MULTI_ARCH) || (GDB_MULTI_ARCH == 0) |
141 | /* | |
142 | * The following defines must go away for MULTI_ARCH | |
143 | */ | |
c906108c | 144 | |
5af923b0 MS |
145 | /* Initializer for an array of names of registers. |
146 | There should be NUM_REGS strings in this initializer. */ | |
c906108c | 147 | |
5af923b0 MS |
148 | #define REGISTER_NAMES \ |
149 | { "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7", \ | |
150 | "o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7", \ | |
151 | "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7", \ | |
152 | "i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7", \ | |
153 | \ | |
154 | "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \ | |
155 | "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \ | |
156 | "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \ | |
157 | "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \ | |
158 | \ | |
159 | "y", "psr", "wim", "tbr", "pc", "npc", "fpsr", "cpsr" \ | |
160 | } | |
c906108c | 161 | |
5af923b0 | 162 | #define TARGET_BYTE_ORDER BIG_ENDIAN |
c906108c SS |
163 | |
164 | /* Offset from address of function to start of its code. | |
165 | Zero on most machines. */ | |
166 | ||
167 | #define FUNCTION_START_OFFSET 0 | |
168 | ||
c906108c SS |
169 | /* Amount PC must be decremented by after a breakpoint. |
170 | This is often the number of bytes in BREAKPOINT | |
171 | but not always. */ | |
172 | ||
173 | #define DECR_PC_AFTER_BREAK 0 | |
174 | ||
175 | /* Say how long (ordinary) registers are. This is a piece of bogosity | |
176 | used in push_word and a few other places; REGISTER_RAW_SIZE is the | |
177 | real way to know how big a register is. */ | |
178 | ||
179 | #define REGISTER_SIZE 4 | |
180 | ||
181 | /* Number of machine registers */ | |
182 | ||
183 | #define NUM_REGS 72 | |
184 | ||
c906108c SS |
185 | #define SP_REGNUM 14 /* Contains address of top of stack, \ |
186 | which is also the bottom of the frame. */ | |
c906108c | 187 | #define FP_REGNUM 30 /* Contains address of executing stack frame */ |
5af923b0 | 188 | |
c906108c | 189 | #define FP0_REGNUM 32 /* Floating point register 0 */ |
5af923b0 | 190 | |
c906108c | 191 | #define Y_REGNUM 64 /* Temp register for multiplication, etc. */ |
5af923b0 | 192 | |
c906108c | 193 | #define PC_REGNUM 68 /* Contains program counter */ |
5af923b0 | 194 | |
c5aa993b | 195 | #define NPC_REGNUM 69 /* Contains next PC */ |
5af923b0 | 196 | |
c906108c SS |
197 | |
198 | /* Total amount of space needed to store our copies of the machine's | |
199 | register state, the array `registers'. On the sparc, `registers' | |
200 | contains the ins and locals, even though they are saved on the | |
201 | stack rather than with the other registers, and this causes hair | |
5af923b0 MS |
202 | and confusion in places like pop_frame. It might be better to |
203 | remove the ins and locals from `registers', make sure that | |
204 | get_saved_register can get them from the stack (even in the | |
c906108c | 205 | innermost frame), and make this the way to access them. For the |
5af923b0 MS |
206 | frame pointer we would do that via TARGET_READ_FP. On the other |
207 | hand, that is likely to be confusing or worse for flat frames. */ | |
c906108c SS |
208 | |
209 | #define REGISTER_BYTES (32*4+32*4+8*4) | |
210 | ||
211 | /* Index within `registers' of the first byte of the space for | |
212 | register N. */ | |
c906108c | 213 | |
5af923b0 | 214 | #define REGISTER_BYTE(N) ((N)*4) |
c906108c | 215 | |
5af923b0 MS |
216 | /* Number of bytes of storage in the actual machine representation for |
217 | register N. */ | |
c906108c | 218 | |
5af923b0 | 219 | /* On the SPARC, all regs are 4 bytes (except Sparc64, where they're 8). */ |
c906108c SS |
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 | ||
5af923b0 | 226 | /* On the SPARC, all regs are 4 bytes (except Sparc64, where they're 8). */ |
c906108c SS |
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) \ | |
5af923b0 MS |
242 | ((N) < 32 ? builtin_type_int : (N) < 64 ? builtin_type_float : \ |
243 | builtin_type_int) | |
c906108c | 244 | |
5af923b0 MS |
245 | /* Sun /bin/cc gets this right as of SunOS 4.1.x. We need to define |
246 | BELIEVE_PCC_PROMOTION to get this right now that the code which | |
247 | detects gcc2_compiled. is broken. This loses for SunOS 4.0.x and | |
248 | earlier. */ | |
c906108c | 249 | |
5af923b0 | 250 | #define BELIEVE_PCC_PROMOTION 1 |
c906108c | 251 | |
5af923b0 MS |
252 | /* Advance PC across any function entry prologue instructions |
253 | to reach some "real" code. SKIP_PROLOGUE_FRAMELESS_P advances | |
254 | the PC past some of the prologue, but stops as soon as it | |
255 | knows that the function has a frame. Its result is equal | |
256 | to its input PC if the function is frameless, unequal otherwise. */ | |
c906108c | 257 | |
5af923b0 | 258 | #define SKIP_PROLOGUE(PC) sparc_skip_prologue (PC, 0) |
c906108c | 259 | |
5af923b0 MS |
260 | /* Immediately after a function call, return the saved pc. |
261 | Can't go through the frames for this because on some machines | |
262 | the new frame is not set up until the new function executes | |
263 | some instructions. */ | |
c906108c | 264 | |
5af923b0 MS |
265 | #define SAVED_PC_AFTER_CALL(FRAME) PC_ADJUST (read_register (RP_REGNUM)) |
266 | ||
267 | /* Stack grows downward. */ | |
268 | ||
269 | #define INNER_THAN(LHS,RHS) ((LHS) < (RHS)) | |
270 | ||
271 | /* Write into appropriate registers a function return value of type | |
272 | TYPE, given in virtual format. */ | |
c906108c | 273 | |
5af923b0 MS |
274 | #define STORE_RETURN_VALUE(TYPE, VALBUF) \ |
275 | sparc_store_return_value (TYPE, VALBUF) | |
a14ed312 | 276 | extern void sparc_store_return_value (struct type *, char *); |
c906108c SS |
277 | |
278 | /* Extract from an array REGBUF containing the (raw) register state | |
279 | the address in which a function should return its structure value, | |
280 | as a CORE_ADDR (or an expression that can be used as one). */ | |
281 | ||
282 | #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \ | |
5af923b0 | 283 | sparc_extract_struct_value_address (REGBUF) |
c906108c | 284 | |
a14ed312 | 285 | extern CORE_ADDR sparc_extract_struct_value_address (char *); |
5af923b0 MS |
286 | |
287 | /* If the current gcc for for this target does not produce correct | |
288 | debugging information for float parameters, both prototyped and | |
289 | unprototyped, then define this macro. This forces gdb to always | |
290 | assume that floats are passed as doubles and then converted in the | |
291 | callee. */ | |
292 | ||
293 | #define COERCE_FLOAT_TO_DOUBLE(FORMAL, ACTUAL) (1) | |
294 | ||
295 | /* Stack must be aligned on 64-bit boundaries when synthesizing | |
296 | function calls (128-bit for sparc64). */ | |
297 | ||
298 | #define STACK_ALIGN(ADDR) sparc32_stack_align (ADDR) | |
299 | extern CORE_ADDR sparc32_stack_align (CORE_ADDR addr); | |
300 | ||
301 | /* Floating point is IEEE compatible. */ | |
302 | #define IEEE_FLOAT (1) | |
303 | ||
304 | /* The Sparc returns long doubles on the stack. */ | |
305 | ||
306 | #define RETURN_VALUE_ON_STACK(TYPE) \ | |
307 | (TYPE_CODE(TYPE) == TYPE_CODE_FLT \ | |
308 | && TYPE_LENGTH(TYPE) > 8) | |
309 | ||
310 | /* When passing a structure to a function, Sun cc passes the address | |
311 | not the structure itself. It (under SunOS4) creates two symbols, | |
312 | which we need to combine to a LOC_REGPARM. Gcc version two (as of | |
313 | 1.92) behaves like sun cc. REG_STRUCT_HAS_ADDR is smart enough to | |
314 | distinguish between Sun cc, gcc version 1 and gcc version 2. */ | |
315 | ||
316 | #define REG_STRUCT_HAS_ADDR(GCC_P, TYPE) \ | |
317 | sparc_reg_struct_has_addr (GCC_P, TYPE) | |
318 | extern int sparc_reg_struct_has_addr (int, struct type *); | |
319 | ||
320 | #endif /* GDB_MULTI_ARCH */ | |
321 | ||
322 | #if defined (GDB_MULTI_ARCH) && (GDB_MULTI_ARCH > 0) | |
323 | /* | |
324 | * The following defines should ONLY appear for MULTI_ARCH. | |
325 | */ | |
326 | ||
327 | /* Multi-arch the nPC and Y registers. */ | |
328 | #define Y_REGNUM (sparc_y_regnum ()) | |
329 | extern int sparc_npc_regnum (void); | |
330 | extern int sparc_y_regnum (void); | |
331 | ||
332 | #endif /* GDB_MULTI_ARCH */ | |
333 | ||
334 | /* On the Sun 4 under SunOS, the compile will leave a fake insn which | |
335 | encodes the structure size being returned. If we detect such | |
336 | a fake insn, step past it. */ | |
337 | ||
338 | #define PC_ADJUST(PC) sparc_pc_adjust (PC) | |
a14ed312 | 339 | extern CORE_ADDR sparc_pc_adjust (CORE_ADDR); |
5af923b0 MS |
340 | |
341 | /* Advance PC across any function entry prologue instructions to reach | |
342 | some "real" code. SKIP_PROLOGUE_FRAMELESS_P advances the PC past | |
343 | some of the prologue, but stops as soon as it knows that the | |
344 | function has a frame. Its result is equal to its input PC if the | |
345 | function is frameless, unequal otherwise. */ | |
346 | ||
347 | #define SKIP_PROLOGUE_FRAMELESS_P(PC) sparc_skip_prologue (PC, 1) | |
a14ed312 | 348 | extern CORE_ADDR sparc_skip_prologue (CORE_ADDR, int); |
5af923b0 MS |
349 | |
350 | /* If an argument is declared "register", Sun cc will keep it in a register, | |
351 | never saving it onto the stack. So we better not believe the "p" symbol | |
352 | descriptor stab. */ | |
353 | ||
354 | #define USE_REGISTER_NOT_ARG | |
355 | ||
356 | /* For acc, there's no need to correct LBRAC entries by guessing how | |
357 | they should work. In fact, this is harmful because the LBRAC | |
358 | entries now all appear at the end of the function, not intermixed | |
359 | with the SLINE entries. n_opt_found detects acc for Solaris binaries; | |
360 | function_stab_type detects acc for SunOS4 binaries. | |
361 | ||
362 | For binary from SunOS4 /bin/cc, need to correct LBRAC's. | |
363 | ||
364 | For gcc, like acc, don't correct. */ | |
365 | ||
366 | #define SUN_FIXED_LBRAC_BUG \ | |
367 | (n_opt_found \ | |
368 | || function_stab_type == N_STSYM \ | |
369 | || function_stab_type == N_GSYM \ | |
370 | || processing_gcc_compilation) | |
371 | ||
372 | /* Do variables in the debug stabs occur after the N_LBRAC or before it? | |
373 | acc: after, gcc: before, SunOS4 /bin/cc: before. */ | |
374 | ||
375 | #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) \ | |
376 | (!(gcc_p) \ | |
377 | && (n_opt_found \ | |
378 | || function_stab_type == N_STSYM \ | |
379 | || function_stab_type == N_GSYM)) | |
380 | ||
381 | /* Sequence of bytes for breakpoint instruction (ta 1). */ | |
382 | ||
383 | #define BREAKPOINT {0x91, 0xd0, 0x20, 0x01} | |
384 | ||
385 | /* Register numbers of various important registers. | |
386 | Note that some of these values are "real" register numbers, | |
387 | and correspond to the general registers of the machine, | |
388 | and some are "phony" register numbers which are too large | |
389 | to be actual register numbers as far as the user is concerned | |
390 | but do serve to get the desired values when passed to read_register. */ | |
391 | ||
392 | #define G0_REGNUM 0 /* %g0 */ | |
393 | #define G1_REGNUM 1 /* %g1 */ | |
394 | #define O0_REGNUM 8 /* %o0 */ | |
395 | #define RP_REGNUM 15 /* Contains return address value, *before* \ | |
396 | any windows get switched. */ | |
397 | #define O7_REGNUM 15 /* Last local reg not saved on stack frame */ | |
398 | #define L0_REGNUM 16 /* First local reg that's saved on stack frame | |
399 | rather than in machine registers */ | |
400 | #define I0_REGNUM 24 /* %i0 */ | |
401 | #define I7_REGNUM 31 /* Last local reg saved on stack frame */ | |
402 | #define PS_REGNUM 65 /* Contains processor status */ | |
403 | #define PS_FLAG_CARRY 0x100000 /* Carry bit in PS */ | |
404 | #define WIM_REGNUM 66 /* Window Invalid Mask (not really supported) */ | |
405 | #define TBR_REGNUM 67 /* Trap Base Register (not really supported) */ | |
406 | #define FPS_REGNUM 70 /* Floating point status register */ | |
407 | #define CPS_REGNUM 71 /* Coprocessor status register */ | |
408 | ||
409 | /* Writing to %g0 is a noop (not an error or exception or anything like | |
410 | that, however). */ | |
411 | ||
412 | #define CANNOT_STORE_REGISTER(regno) ((regno) == G0_REGNUM) | |
413 | ||
414 | /* | |
415 | * FRAME_CHAIN and FRAME_INFO definitions, collected here for convenience. | |
416 | */ | |
417 | ||
418 | #if !defined (GDB_MULTI_ARCH) || (GDB_MULTI_ARCH == 0) | |
419 | /* | |
420 | * The following defines must go away for MULTI_ARCH. | |
421 | */ | |
c5aa993b | 422 | |
c906108c SS |
423 | /* Describe the pointer in each stack frame to the previous stack frame |
424 | (its caller). */ | |
425 | ||
426 | /* FRAME_CHAIN takes a frame's nominal address | |
427 | and produces the frame's chain-pointer. */ | |
428 | ||
429 | /* In the case of the Sun 4, the frame-chain's nominal address | |
430 | is held in the frame pointer register. | |
431 | ||
432 | On the Sun4, the frame (in %fp) is %sp for the previous frame. | |
433 | From the previous frame's %sp, we can find the previous frame's | |
434 | %fp: it is in the save area just above the previous frame's %sp. | |
435 | ||
436 | If we are setting up an arbitrary frame, we'll need to know where | |
437 | it ends. Hence the following. This part of the frame cache | |
438 | structure should be checked before it is assumed that this frame's | |
439 | bottom is in the stack pointer. | |
440 | ||
441 | If there isn't a frame below this one, the bottom of this frame is | |
442 | in the stack pointer. | |
443 | ||
444 | If there is a frame below this one, and the frame pointers are | |
445 | identical, it's a leaf frame and the bottoms are the same also. | |
446 | ||
447 | Otherwise the bottom of this frame is the top of the next frame. | |
448 | ||
449 | The bottom field is misnamed, since it might imply that memory from | |
450 | bottom to frame contains this frame. That need not be true if | |
451 | stack frames are allocated in different segments (e.g. some on a | |
452 | stack, some on a heap in the data segment). | |
453 | ||
454 | GCC 2.6 and later can generate ``flat register window'' code that | |
455 | makes frames by explicitly saving those registers that need to be | |
5af923b0 MS |
456 | saved. %i7 is used as the frame pointer, and the frame is laid out |
457 | so that flat and non-flat calls can be intermixed freely within a | |
458 | program. Unfortunately for GDB, this means it must detect and | |
459 | record the flatness of frames. | |
c906108c SS |
460 | |
461 | Since the prologue in a flat frame also tells us where fp and pc | |
462 | have been stashed (the frame is of variable size, so their location | |
463 | is not fixed), it's convenient to record them in the frame info. */ | |
464 | ||
5af923b0 MS |
465 | #define EXTRA_FRAME_INFO \ |
466 | CORE_ADDR bottom; \ | |
467 | int in_prologue; \ | |
468 | int flat; \ | |
c906108c | 469 | /* Following fields only relevant for flat frames. */ \ |
5af923b0 MS |
470 | CORE_ADDR pc_addr; \ |
471 | CORE_ADDR fp_addr; \ | |
c906108c SS |
472 | /* Add this to ->frame to get the value of the stack pointer at the */ \ |
473 | /* time of the register saves. */ \ | |
474 | int sp_offset; | |
475 | ||
5af923b0 MS |
476 | /* We need to override GET_SAVED_REGISTER so that we can deal with the way |
477 | outs change into ins in different frames. HAVE_REGISTER_WINDOWS can't | |
478 | deal with this case and also handle flat frames at the same time. */ | |
c906108c | 479 | |
a14ed312 KB |
480 | void sparc_get_saved_register (char *raw_buffer, |
481 | int *optimized, | |
482 | CORE_ADDR * addrp, | |
483 | struct frame_info *frame, | |
484 | int regnum, enum lval_type *lvalp); | |
c906108c | 485 | |
5af923b0 MS |
486 | #define GET_SAVED_REGISTER(RAW_BUFFER, OPTIMIZED, ADDRP, FRAME, REGNUM, LVAL) \ |
487 | sparc_get_saved_register (RAW_BUFFER, OPTIMIZED, ADDRP, \ | |
488 | FRAME, REGNUM, LVAL) | |
c906108c | 489 | |
5af923b0 | 490 | #define FRAME_INIT_SAVED_REGS(FP) /*no-op */ |
c906108c | 491 | |
5af923b0 MS |
492 | #define INIT_EXTRA_FRAME_INFO(FROMLEAF, FCI) \ |
493 | sparc_init_extra_frame_info (FROMLEAF, FCI) | |
a14ed312 | 494 | extern void sparc_init_extra_frame_info (int, struct frame_info *); |
c906108c | 495 | |
5af923b0 | 496 | #define FRAME_CHAIN(THISFRAME) (sparc_frame_chain (THISFRAME)) |
a14ed312 | 497 | extern CORE_ADDR sparc_frame_chain (struct frame_info *); |
c906108c SS |
498 | |
499 | /* A macro that tells us whether the function invocation represented | |
500 | by FI does not have a frame on the stack associated with it. If it | |
501 | does not, FRAMELESS is set to 1, else 0. */ | |
c906108c | 502 | |
5af923b0 MS |
503 | #define FRAMELESS_FUNCTION_INVOCATION(FI) \ |
504 | frameless_look_for_prologue (FI) | |
c906108c SS |
505 | |
506 | /* Where is the PC for a specific frame */ | |
507 | ||
508 | #define FRAME_SAVED_PC(FRAME) sparc_frame_saved_pc (FRAME) | |
a14ed312 | 509 | extern CORE_ADDR sparc_frame_saved_pc (struct frame_info *); |
c906108c SS |
510 | |
511 | /* If the argument is on the stack, it will be here. */ | |
5af923b0 | 512 | #define FRAME_ARGS_ADDRESS(FI) ((FI)->frame) |
c906108c | 513 | |
5af923b0 | 514 | #define FRAME_LOCALS_ADDRESS(FI) ((FI)->frame) |
c906108c SS |
515 | |
516 | /* Set VAL to the number of args passed to frame described by FI. | |
517 | Can set VAL to -1, meaning no way to tell. */ | |
518 | ||
519 | /* We can't tell how many args there are | |
520 | now that the C compiler delays popping them. */ | |
5af923b0 | 521 | #define FRAME_NUM_ARGS(FI) (-1) |
c906108c SS |
522 | |
523 | /* Return number of bytes at start of arglist that are not really args. */ | |
524 | ||
525 | #define FRAME_ARGS_SKIP 68 | |
5af923b0 MS |
526 | |
527 | #endif /* GDB_MULTI_ARCH */ | |
528 | ||
529 | #define PRINT_EXTRA_FRAME_INFO(FI) \ | |
530 | sparc_print_extra_frame_info (FI) | |
531 | extern void sparc_print_extra_frame_info (struct frame_info *); | |
532 | ||
533 | /* INIT_EXTRA_FRAME_INFO needs the PC to detect flat frames. */ | |
534 | ||
535 | #define INIT_FRAME_PC(FROMLEAF, PREV) /* nothing */ | |
536 | #define INIT_FRAME_PC_FIRST(FROMLEAF, PREV) \ | |
537 | (PREV)->pc = ((FROMLEAF) ? SAVED_PC_AFTER_CALL ((PREV)->next) : \ | |
538 | (PREV)->next ? FRAME_SAVED_PC ((PREV)->next) : read_pc ()); | |
539 | ||
540 | /* Define other aspects of the stack frame. */ | |
541 | ||
542 | /* The location of I0 w.r.t SP. This is actually dependent on how the | |
543 | system's window overflow/underflow routines are written. Most | |
544 | vendors save the L regs followed by the I regs (at the higher | |
545 | address). Some vendors get it wrong. */ | |
546 | ||
547 | #define FRAME_SAVED_L0 0 | |
548 | #define FRAME_SAVED_I0 (8 * REGISTER_RAW_SIZE (L0_REGNUM)) | |
549 | ||
550 | #define FRAME_STRUCT_ARGS_ADDRESS(FI) ((FI)->frame) | |
551 | ||
c906108c SS |
552 | /* Things needed for making the inferior call functions. */ |
553 | /* | |
554 | * First of all, let me give my opinion of what the DUMMY_FRAME | |
555 | * actually looks like. | |
556 | * | |
557 | * | | | |
558 | * | | | |
559 | * + - - - - - - - - - - - - - - - - +<-- fp (level 0) | |
560 | * | | | |
561 | * | | | |
562 | * | | | |
563 | * | | | |
564 | * | Frame of innermost program | | |
565 | * | function | | |
566 | * | | | |
567 | * | | | |
568 | * | | | |
569 | * | | | |
570 | * | | | |
571 | * |---------------------------------|<-- sp (level 0), fp (c) | |
572 | * | | | |
573 | * DUMMY | fp0-31 | | |
574 | * | | | |
575 | * | ------ |<-- fp - 0x80 | |
576 | * FRAME | g0-7 |<-- fp - 0xa0 | |
577 | * | i0-7 |<-- fp - 0xc0 | |
578 | * | other |<-- fp - 0xe0 | |
579 | * | ? | | |
580 | * | ? | | |
581 | * |---------------------------------|<-- sp' = fp - 0x140 | |
582 | * | | | |
583 | * xcution start | | | |
584 | * sp' + 0x94 -->| CALL_DUMMY (x code) | | |
585 | * | | | |
586 | * | | | |
587 | * |---------------------------------|<-- sp'' = fp - 0x200 | |
588 | * | align sp to 8 byte boundary | | |
589 | * | ==> args to fn <== | | |
590 | * Room for | | | |
591 | * i & l's + agg | CALL_DUMMY_STACK_ADJUST = 0x0x44| | |
592 | * |---------------------------------|<-- final sp (variable) | |
593 | * | | | |
594 | * | Where function called will | | |
595 | * | build frame. | | |
596 | * | | | |
597 | * | | | |
598 | * | |
599 | * I understand everything in this picture except what the space | |
600 | * between fp - 0xe0 and fp - 0x140 is used for. Oh, and I don't | |
601 | * understand why there's a large chunk of CALL_DUMMY that never gets | |
602 | * executed (its function is superceeded by PUSH_DUMMY_FRAME; they | |
603 | * are designed to do the same thing). | |
604 | * | |
605 | * PUSH_DUMMY_FRAME saves the registers above sp' and pushes the | |
606 | * register file stack down one. | |
607 | * | |
608 | * call_function then writes CALL_DUMMY, pushes the args onto the | |
609 | * stack, and adjusts the stack pointer. | |
610 | * | |
611 | * run_stack_dummy then starts execution (in the middle of | |
612 | * CALL_DUMMY, as directed by call_function). | |
613 | */ | |
614 | ||
c906108c SS |
615 | #ifndef CALL_DUMMY |
616 | /* This sequence of words is the instructions | |
617 | ||
5af923b0 MS |
618 | 00: bc 10 00 01 mov %g1, %fp |
619 | 04: 9d e3 80 00 save %sp, %g0, %sp | |
620 | 08: bc 10 00 02 mov %g2, %fp | |
621 | 0c: be 10 00 03 mov %g3, %i7 | |
c5aa993b JM |
622 | 10: da 03 a0 58 ld [ %sp + 0x58 ], %o5 |
623 | 14: d8 03 a0 54 ld [ %sp + 0x54 ], %o4 | |
624 | 18: d6 03 a0 50 ld [ %sp + 0x50 ], %o3 | |
625 | 1c: d4 03 a0 4c ld [ %sp + 0x4c ], %o2 | |
626 | 20: d2 03 a0 48 ld [ %sp + 0x48 ], %o1 | |
627 | 24: 40 00 00 00 call <fun> | |
628 | 28: d0 03 a0 44 ld [ %sp + 0x44 ], %o0 | |
629 | 2c: 01 00 00 00 nop | |
630 | 30: 91 d0 20 01 ta 1 | |
631 | 34: 01 00 00 00 nop | |
c906108c SS |
632 | |
633 | NOTES: | |
c5aa993b JM |
634 | * the first four instructions are necessary only on the simulator. |
635 | * this is a multiple of 8 (not only 4) bytes. | |
636 | * the `call' insn is a relative, not an absolute call. | |
637 | * the `nop' at the end is needed to keep the trap from | |
5af923b0 MS |
638 | clobbering things (if NPC pointed to garbage instead). |
639 | */ | |
640 | ||
641 | #if !defined (GDB_MULTI_ARCH) || (GDB_MULTI_ARCH == 0) | |
642 | /* | |
643 | * The following defines must go away for MULTI_ARCH. | |
c5aa993b | 644 | */ |
c906108c SS |
645 | |
646 | #define CALL_DUMMY { 0xbc100001, 0x9de38000, 0xbc100002, 0xbe100003, \ | |
647 | 0xda03a058, 0xd803a054, 0xd603a050, 0xd403a04c, \ | |
648 | 0xd203a048, 0x40000000, 0xd003a044, 0x01000000, \ | |
649 | 0x91d02001, 0x01000000 } | |
650 | ||
651 | ||
652 | /* Size of the call dummy in bytes. */ | |
653 | ||
654 | #define CALL_DUMMY_LENGTH 0x38 | |
655 | ||
656 | /* Offset within call dummy of first instruction to execute. */ | |
657 | ||
658 | #define CALL_DUMMY_START_OFFSET 0 | |
659 | ||
660 | /* Offset within CALL_DUMMY of the 'call' instruction. */ | |
661 | ||
662 | #define CALL_DUMMY_CALL_OFFSET (CALL_DUMMY_START_OFFSET + 0x24) | |
663 | ||
5af923b0 | 664 | /* Offset within CALL_DUMMY of the 'ta 1' trap instruction. */ |
c906108c SS |
665 | |
666 | #define CALL_DUMMY_BREAKPOINT_OFFSET (CALL_DUMMY_START_OFFSET + 0x30) | |
667 | ||
668 | #define CALL_DUMMY_STACK_ADJUST 68 | |
669 | ||
5af923b0 MS |
670 | /* Call dummy method (eg. on stack, at entry point, etc.) */ |
671 | ||
672 | #define CALL_DUMMY_LOCATION ON_STACK | |
673 | ||
674 | /* Method for detecting dummy frames. */ | |
675 | ||
676 | #define PC_IN_CALL_DUMMY(PC, SP, FRAME_ADDRESS) \ | |
677 | pc_in_call_dummy_on_stack (PC, SP, FRAME_ADDRESS) | |
678 | ||
679 | #endif /* GDB_MULTI_ARCH */ | |
680 | ||
681 | #endif /* CALL_DUMMY */ | |
682 | ||
683 | #if !defined (GDB_MULTI_ARCH) || (GDB_MULTI_ARCH == 0) | |
684 | /* | |
685 | * The following defines must go away for MULTI_ARCH. | |
686 | */ | |
687 | ||
c906108c SS |
688 | /* Insert the specified number of args and function address |
689 | into a call sequence of the above form stored at DUMMYNAME. */ | |
690 | ||
5af923b0 MS |
691 | #define FIX_CALL_DUMMY(DUMMYNAME, PC, FUN, NARGS, ARGS, TYPE, GCC_P) \ |
692 | sparc_fix_call_dummy (DUMMYNAME, PC, FUN, TYPE, GCC_P) | |
a14ed312 KB |
693 | void sparc_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, |
694 | struct type *value_type, int using_gcc); | |
c906108c | 695 | |
5af923b0 MS |
696 | /* Arguments smaller than an int must be promoted to ints when |
697 | synthesizing function calls. */ | |
698 | ||
699 | /* Push an empty stack frame, to record the current PC, etc. */ | |
700 | ||
701 | #define PUSH_DUMMY_FRAME sparc_push_dummy_frame () | |
702 | #define POP_FRAME sparc_pop_frame () | |
703 | ||
a14ed312 KB |
704 | void sparc_push_dummy_frame (void); |
705 | void sparc_pop_frame (void); | |
5af923b0 MS |
706 | |
707 | #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \ | |
708 | sparc32_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) | |
709 | ||
710 | extern CORE_ADDR | |
a14ed312 | 711 | sparc32_push_arguments (int, struct value **, CORE_ADDR, int, CORE_ADDR); |
5af923b0 MS |
712 | |
713 | /* Store the address of the place in which to copy the structure the | |
714 | subroutine will return. This is called from call_function_by_hand. | |
715 | The ultimate mystery is, tho, what is the value "16"? */ | |
716 | ||
717 | #define STORE_STRUCT_RETURN(ADDR, SP) \ | |
718 | { char val[4]; \ | |
719 | store_unsigned_integer (val, 4, (ADDR)); \ | |
720 | write_memory ((SP)+(16*4), val, 4); } | |
721 | ||
722 | /* Default definition of USE_STRUCT_CONVENTION. */ | |
723 | ||
724 | #ifndef USE_STRUCT_CONVENTION | |
725 | #define USE_STRUCT_CONVENTION(GCC_P, TYPE) \ | |
726 | generic_use_struct_convention (GCC_P, TYPE) | |
727 | #endif | |
728 | ||
729 | /* Extract from an array REGBUF containing the (raw) register state a | |
730 | function return value of type TYPE, and copy that, in virtual | |
731 | format, into VALBUF. */ | |
732 | ||
733 | #define EXTRACT_RETURN_VALUE(TYPE, REGBUF, VALBUF) \ | |
734 | sparc32_extract_return_value (TYPE, REGBUF, VALBUF) | |
a14ed312 | 735 | extern void sparc32_extract_return_value (struct type *, char[], char *); |
5af923b0 MS |
736 | |
737 | #endif /* GDB_MULTI_ARCH */ | |
c906108c | 738 | |
c906108c SS |
739 | \f |
740 | /* Sparc has no reliable single step ptrace call */ | |
741 | ||
b0ed3589 | 742 | #define SOFTWARE_SINGLE_STEP_P() 1 |
a14ed312 | 743 | extern void sparc_software_single_step (unsigned int, int); |
c906108c SS |
744 | #define SOFTWARE_SINGLE_STEP(sig,bp_p) sparc_software_single_step (sig,bp_p) |
745 | ||
746 | /* We need more arguments in a frame specification for the | |
747 | "frame" or "info frame" command. */ | |
748 | ||
749 | #define SETUP_ARBITRARY_FRAME(argc, argv) setup_arbitrary_frame (argc, argv) | |
a14ed312 | 750 | extern struct frame_info *setup_arbitrary_frame (int, CORE_ADDR *); |
c906108c SS |
751 | |
752 | /* To print every pair of float registers as a double, we use this hook. | |
753 | We also print the condition code registers in a readable format | |
754 | (FIXME: can expand this to all control regs). */ | |
755 | ||
756 | #undef PRINT_REGISTER_HOOK | |
757 | #define PRINT_REGISTER_HOOK(regno) \ | |
758 | sparc_print_register_hook (regno) | |
a14ed312 | 759 | extern void sparc_print_register_hook (int regno); |
c906108c | 760 | |
c906108c SS |
761 | /* Optimization for storing registers to the inferior. The hook |
762 | DO_DEFERRED_STORES | |
763 | actually executes any deferred stores. It is called any time | |
764 | we are going to proceed the child, or read its registers. | |
765 | The hook CLEAR_DEFERRED_STORES is called when we want to throw | |
766 | away the inferior process, e.g. when it dies or we kill it. | |
767 | FIXME, this does not handle remote debugging cleanly. */ | |
768 | ||
769 | extern int deferred_stores; | |
770 | #define DO_DEFERRED_STORES \ | |
771 | if (deferred_stores) \ | |
772 | target_store_registers (-2); | |
773 | #define CLEAR_DEFERRED_STORES \ | |
774 | deferred_stores = 0; | |
775 | ||
c906108c SS |
776 | /* Select the sparc disassembler */ |
777 | ||
778 | #define TM_PRINT_INSN_MACH bfd_mach_sparc | |
779 |