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c906108c | 1 | /* Parameters for execution on any Hewlett-Packard PA-RISC machine. |
b6ba6518 KB |
2 | Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, |
3 | 1998, 1999, 2000 Free Software Foundation, Inc. | |
c906108c SS |
4 | |
5 | Contributed by the Center for Software Science at the | |
6 | University of Utah (pa-gdb-bugs@cs.utah.edu). | |
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 | ||
e6e68f1f JB |
27 | #define GDB_MULTI_ARCH 0 |
28 | ||
e92b0cc9 | 29 | /* NOTE: cagney/2002-11-24: This is a guess. */ |
07555a72 | 30 | #define DEPRECATED_USE_GENERIC_DUMMY_FRAMES 0 |
e92b0cc9 | 31 | #define CALL_DUMMY_LOCATION ON_STACK |
ed5cedc5 | 32 | #define PC_IN_CALL_DUMMY(pc, sp, frame_address) deprecated_pc_in_call_dummy_on_stack (pc, sp, frame_address) |
e92b0cc9 | 33 | |
c906108c SS |
34 | /* Forward declarations of some types we use in prototypes */ |
35 | ||
c906108c SS |
36 | struct frame_info; |
37 | struct frame_saved_regs; | |
38 | struct value; | |
39 | struct type; | |
40 | struct inferior_status; | |
c906108c | 41 | |
c906108c SS |
42 | /* By default assume we don't have to worry about software floating point. */ |
43 | #ifndef SOFT_FLOAT | |
44 | #define SOFT_FLOAT 0 | |
45 | #endif | |
46 | ||
47 | /* Get at various relevent fields of an instruction word. */ | |
48 | ||
49 | #define MASK_5 0x1f | |
50 | #define MASK_11 0x7ff | |
51 | #define MASK_14 0x3fff | |
52 | #define MASK_21 0x1fffff | |
53 | ||
54 | /* This macro gets bit fields using HP's numbering (MSB = 0) */ | |
55 | #ifndef GET_FIELD | |
56 | #define GET_FIELD(X, FROM, TO) \ | |
57 | ((X) >> (31 - (TO)) & ((1 << ((TO) - (FROM) + 1)) - 1)) | |
58 | #endif | |
59 | ||
d709c020 JB |
60 | extern int hppa_reg_struct_has_addr (int gcc_p, struct type *type); |
61 | #define REG_STRUCT_HAS_ADDR(gcc_p,type) hppa_reg_struct_has_addr (gcc_p,type) | |
c906108c SS |
62 | |
63 | /* Offset from address of function to start of its code. | |
64 | Zero on most machines. */ | |
65 | ||
66 | #define FUNCTION_START_OFFSET 0 | |
c5aa993b | 67 | |
c906108c SS |
68 | /* Advance PC across any function entry prologue instructions |
69 | to reach some "real" code. */ | |
70 | ||
a14ed312 | 71 | extern CORE_ADDR hppa_skip_prologue (CORE_ADDR); |
b83266a0 | 72 | #define SKIP_PROLOGUE(pc) (hppa_skip_prologue (pc)) |
c906108c SS |
73 | |
74 | /* If PC is in some function-call trampoline code, return the PC | |
75 | where the function itself actually starts. If not, return NULL. */ | |
76 | ||
77 | #define SKIP_TRAMPOLINE_CODE(pc) skip_trampoline_code (pc, NULL) | |
a14ed312 | 78 | extern CORE_ADDR skip_trampoline_code (CORE_ADDR, char *); |
c906108c SS |
79 | |
80 | /* Return non-zero if we are in an appropriate trampoline. */ | |
81 | ||
82 | #define IN_SOLIB_CALL_TRAMPOLINE(pc, name) \ | |
83 | in_solib_call_trampoline (pc, name) | |
a14ed312 | 84 | extern int in_solib_call_trampoline (CORE_ADDR, char *); |
c906108c SS |
85 | |
86 | #define IN_SOLIB_RETURN_TRAMPOLINE(pc, name) \ | |
87 | in_solib_return_trampoline (pc, name) | |
a14ed312 | 88 | extern int in_solib_return_trampoline (CORE_ADDR, char *); |
c906108c | 89 | |
c906108c SS |
90 | #undef SAVED_PC_AFTER_CALL |
91 | #define SAVED_PC_AFTER_CALL(frame) saved_pc_after_call (frame) | |
a14ed312 | 92 | extern CORE_ADDR saved_pc_after_call (struct frame_info *); |
c906108c | 93 | |
d709c020 JB |
94 | extern int hppa_inner_than (CORE_ADDR lhs, CORE_ADDR rhs); |
95 | #define INNER_THAN(lhs,rhs) hppa_inner_than(lhs,rhs) | |
c906108c | 96 | |
d709c020 JB |
97 | extern CORE_ADDR hppa_stack_align (CORE_ADDR sp); |
98 | #define STACK_ALIGN(sp) hppa_stack_align (sp) | |
c906108c | 99 | |
0a49d05e | 100 | #define EXTRA_STACK_ALIGNMENT_NEEDED 0 |
c906108c SS |
101 | |
102 | /* Sequence of bytes for breakpoint instruction. */ | |
103 | ||
104 | #define BREAKPOINT {0x00, 0x01, 0x00, 0x04} | |
105 | #define BREAKPOINT32 0x10004 | |
106 | ||
107 | /* Amount PC must be decremented by after a breakpoint. | |
108 | This is often the number of bytes in BREAKPOINT | |
109 | but not always. | |
110 | ||
111 | Not on the PA-RISC */ | |
112 | ||
113 | #define DECR_PC_AFTER_BREAK 0 | |
114 | ||
d709c020 JB |
115 | extern int hppa_pc_requires_run_before_use (CORE_ADDR pc); |
116 | #define PC_REQUIRES_RUN_BEFORE_USE(pc) hppa_pc_requires_run_before_use (pc) | |
c906108c SS |
117 | |
118 | /* Say how long (ordinary) registers are. This is a piece of bogosity | |
119 | used in push_word and a few other places; REGISTER_RAW_SIZE is the | |
120 | real way to know how big a register is. */ | |
121 | ||
122 | #define REGISTER_SIZE 4 | |
123 | ||
124 | /* Number of machine registers */ | |
125 | ||
126 | #define NUM_REGS 128 | |
127 | ||
128 | /* Initializer for an array of names of registers. | |
129 | There should be NUM_REGS strings in this initializer. | |
130 | They are in rows of eight entries */ | |
131 | ||
132 | #define REGISTER_NAMES \ | |
133 | {"flags", "r1", "rp", "r3", "r4", "r5", "r6", "r7", \ | |
134 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \ | |
135 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \ | |
136 | "r24", "r25", "r26", "dp", "ret0", "ret1", "sp", "r31", \ | |
137 | "sar", "pcoqh", "pcsqh", "pcoqt", "pcsqt", "eiem", "iir", "isr", \ | |
138 | "ior", "ipsw", "goto", "sr4", "sr0", "sr1", "sr2", "sr3", \ | |
139 | "sr5", "sr6", "sr7", "cr0", "cr8", "cr9", "ccr", "cr12", \ | |
140 | "cr13", "cr24", "cr25", "cr26", "mpsfu_high","mpsfu_low","mpsfu_ovflo","pad",\ | |
141 | "fpsr", "fpe1", "fpe2", "fpe3", "fpe4", "fpe5", "fpe6", "fpe7", \ | |
142 | "fr4", "fr4R", "fr5", "fr5R", "fr6", "fr6R", "fr7", "fr7R", \ | |
143 | "fr8", "fr8R", "fr9", "fr9R", "fr10", "fr10R", "fr11", "fr11R", \ | |
144 | "fr12", "fr12R", "fr13", "fr13R", "fr14", "fr14R", "fr15", "fr15R", \ | |
145 | "fr16", "fr16R", "fr17", "fr17R", "fr18", "fr18R", "fr19", "fr19R", \ | |
146 | "fr20", "fr20R", "fr21", "fr21R", "fr22", "fr22R", "fr23", "fr23R", \ | |
147 | "fr24", "fr24R", "fr25", "fr25R", "fr26", "fr26R", "fr27", "fr27R", \ | |
148 | "fr28", "fr28R", "fr29", "fr29R", "fr30", "fr30R", "fr31", "fr31R"} | |
149 | ||
150 | /* Register numbers of various important registers. | |
151 | Note that some of these values are "real" register numbers, | |
152 | and correspond to the general registers of the machine, | |
153 | and some are "phony" register numbers which are too large | |
154 | to be actual register numbers as far as the user is concerned | |
155 | but do serve to get the desired values when passed to read_register. */ | |
156 | ||
157 | #define R0_REGNUM 0 /* Doesn't actually exist, used as base for | |
158 | other r registers. */ | |
159 | #define FLAGS_REGNUM 0 /* Various status flags */ | |
160 | #define RP_REGNUM 2 /* return pointer */ | |
161 | #define FP_REGNUM 3 /* Contains address of executing stack */ | |
162 | /* frame */ | |
163 | #define SP_REGNUM 30 /* Contains address of top of stack */ | |
164 | #define SAR_REGNUM 32 /* Shift Amount Register */ | |
165 | #define IPSW_REGNUM 41 /* Interrupt Processor Status Word */ | |
166 | #define PCOQ_HEAD_REGNUM 33 /* instruction offset queue head */ | |
167 | #define PCSQ_HEAD_REGNUM 34 /* instruction space queue head */ | |
168 | #define PCOQ_TAIL_REGNUM 35 /* instruction offset queue tail */ | |
169 | #define PCSQ_TAIL_REGNUM 36 /* instruction space queue tail */ | |
170 | #define EIEM_REGNUM 37 /* External Interrupt Enable Mask */ | |
171 | #define IIR_REGNUM 38 /* Interrupt Instruction Register */ | |
172 | #define IOR_REGNUM 40 /* Interrupt Offset Register */ | |
173 | #define SR4_REGNUM 43 /* space register 4 */ | |
174 | #define RCR_REGNUM 51 /* Recover Counter (also known as cr0) */ | |
175 | #define CCR_REGNUM 54 /* Coprocessor Configuration Register */ | |
176 | #define TR0_REGNUM 57 /* Temporary Registers (cr24 -> cr31) */ | |
c5aa993b JM |
177 | #define CR27_REGNUM 60 /* Base register for thread-local storage, cr27 */ |
178 | #define FP0_REGNUM 64 /* floating point reg. 0 (fspr) */ | |
c906108c SS |
179 | #define FP4_REGNUM 72 |
180 | ||
c5aa993b JM |
181 | #define ARG0_REGNUM 26 /* The first argument of a callee. */ |
182 | #define ARG1_REGNUM 25 /* The second argument of a callee. */ | |
183 | #define ARG2_REGNUM 24 /* The third argument of a callee. */ | |
184 | #define ARG3_REGNUM 23 /* The fourth argument of a callee. */ | |
c906108c SS |
185 | |
186 | /* compatibility with the rest of gdb. */ | |
187 | #define PC_REGNUM PCOQ_HEAD_REGNUM | |
188 | #define NPC_REGNUM PCOQ_TAIL_REGNUM | |
189 | ||
190 | /* | |
191 | * Processor Status Word Masks | |
192 | */ | |
193 | ||
c5aa993b JM |
194 | #define PSW_T 0x01000000 /* Taken Branch Trap Enable */ |
195 | #define PSW_H 0x00800000 /* Higher-Privilege Transfer Trap Enable */ | |
196 | #define PSW_L 0x00400000 /* Lower-Privilege Transfer Trap Enable */ | |
197 | #define PSW_N 0x00200000 /* PC Queue Front Instruction Nullified */ | |
198 | #define PSW_X 0x00100000 /* Data Memory Break Disable */ | |
199 | #define PSW_B 0x00080000 /* Taken Branch in Previous Cycle */ | |
200 | #define PSW_C 0x00040000 /* Code Address Translation Enable */ | |
201 | #define PSW_V 0x00020000 /* Divide Step Correction */ | |
202 | #define PSW_M 0x00010000 /* High-Priority Machine Check Disable */ | |
203 | #define PSW_CB 0x0000ff00 /* Carry/Borrow Bits */ | |
204 | #define PSW_R 0x00000010 /* Recovery Counter Enable */ | |
205 | #define PSW_Q 0x00000008 /* Interruption State Collection Enable */ | |
206 | #define PSW_P 0x00000004 /* Protection ID Validation Enable */ | |
207 | #define PSW_D 0x00000002 /* Data Address Translation Enable */ | |
208 | #define PSW_I 0x00000001 /* External, Power Failure, Low-Priority */ | |
209 | /* Machine Check Interruption Enable */ | |
c906108c SS |
210 | |
211 | /* When fetching register values from an inferior or a core file, | |
212 | clean them up using this macro. BUF is a char pointer to | |
213 | the raw value of the register in the registers[] array. */ | |
214 | ||
4ee3352d | 215 | #define DEPRECATED_CLEAN_UP_REGISTER_VALUE(regno, buf) \ |
c906108c SS |
216 | do { \ |
217 | if ((regno) == PCOQ_HEAD_REGNUM || (regno) == PCOQ_TAIL_REGNUM) \ | |
7be570e7 | 218 | (buf)[sizeof(CORE_ADDR) -1] &= ~0x3; \ |
c906108c SS |
219 | } while (0) |
220 | ||
903ad3a6 | 221 | /* Define DEPRECATED_REGISTERS_INFO() to do machine-specific formatting |
c906108c SS |
222 | of register dumps. */ |
223 | ||
903ad3a6 | 224 | #define DEPRECATED_REGISTERS_INFO(_regnum, fp) pa_do_registers_info (_regnum, fp) |
a14ed312 | 225 | extern void pa_do_registers_info (int, int); |
c906108c SS |
226 | |
227 | #if 0 | |
228 | #define STRCAT_REGISTER(regnum, fpregs, stream, precision) pa_do_strcat_registers_info (regnum, fpregs, stream, precision) | |
d9fcf2fb | 229 | extern void pa_do_strcat_registers_info (int, int, struct ui_file *, enum precision_type); |
c906108c SS |
230 | #endif |
231 | ||
232 | /* PA specific macro to see if the current instruction is nullified. */ | |
233 | #ifndef INSTRUCTION_NULLIFIED | |
d709c020 JB |
234 | extern int hppa_instruction_nullified (void); |
235 | #define INSTRUCTION_NULLIFIED hppa_instruction_nullified () | |
c906108c SS |
236 | #endif |
237 | ||
238 | /* Number of bytes of storage in the actual machine representation | |
239 | for register N. On the PA-RISC, all regs are 4 bytes, including | |
240 | the FP registers (they're accessed as two 4 byte halves). */ | |
241 | ||
242 | #define REGISTER_RAW_SIZE(N) 4 | |
243 | ||
244 | /* Total amount of space needed to store our copies of the machine's | |
245 | register state, the array `registers'. */ | |
246 | #define REGISTER_BYTES (NUM_REGS * 4) | |
247 | ||
d709c020 JB |
248 | extern int hppa_register_byte (int reg_nr); |
249 | #define REGISTER_BYTE(N) hppa_register_byte (N) | |
c906108c SS |
250 | |
251 | /* Number of bytes of storage in the program's representation | |
252 | for register N. */ | |
253 | ||
254 | #define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N) | |
255 | ||
256 | /* Largest value REGISTER_RAW_SIZE can have. */ | |
257 | ||
258 | #define MAX_REGISTER_RAW_SIZE 4 | |
259 | ||
260 | /* Largest value REGISTER_VIRTUAL_SIZE can have. */ | |
261 | ||
262 | #define MAX_REGISTER_VIRTUAL_SIZE 8 | |
263 | ||
d709c020 JB |
264 | extern struct type * hppa_register_virtual_type (int reg_nr); |
265 | #define REGISTER_VIRTUAL_TYPE(N) hppa_register_virtual_type (N) | |
c906108c | 266 | |
d709c020 JB |
267 | extern void hppa_store_struct_return (CORE_ADDR addr, CORE_ADDR sp); |
268 | #define STORE_STRUCT_RETURN(ADDR, SP) hppa_store_struct_return (ADDR, SP) | |
c906108c SS |
269 | |
270 | /* Extract from an array REGBUF containing the (raw) register state | |
271 | a function return value of type TYPE, and copy that, in virtual format, | |
1cdb71fe | 272 | into VALBUF. */ |
c906108c | 273 | |
61d8d407 | 274 | void hppa_extract_return_value (struct type *type, char *regbuf, char *valbuf); |
26e9b323 | 275 | #define DEPRECATED_EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ |
1cdb71fe | 276 | hppa_extract_return_value (TYPE, REGBUF, VALBUF); |
c906108c SS |
277 | |
278 | /* elz: decide whether the function returning a value of type type | |
279 | will put it on the stack or in the registers. | |
280 | The pa calling convention says that: | |
281 | register 28 (called ret0 by gdb) contains any ASCII char, | |
282 | and any non_floating point value up to 32-bits. | |
283 | reg 28 and 29 contain non-floating point up tp 64 bits and larger | |
284 | than 32 bits. (higer order word in reg 28). | |
285 | fr4: floating point up to 64 bits | |
286 | sr1: space identifier (32-bit) | |
287 | stack: any lager than 64-bit, with the address in r28 | |
c5aa993b | 288 | */ |
c906108c SS |
289 | extern use_struct_convention_fn hppa_use_struct_convention; |
290 | #define USE_STRUCT_CONVENTION(gcc_p,type) hppa_use_struct_convention (gcc_p,type) | |
291 | ||
292 | /* Write into appropriate registers a function return value | |
1cdb71fe | 293 | of type TYPE, given in virtual format. */ |
c906108c | 294 | |
61d8d407 AC |
295 | |
296 | extern void hppa_store_return_value (struct type *type, char *valbuf); | |
ebba8386 | 297 | #define DEPRECATED_STORE_RETURN_VALUE(TYPE,VALBUF) \ |
1cdb71fe | 298 | hppa_store_return_value (TYPE, VALBUF); |
c906108c SS |
299 | |
300 | /* Extract from an array REGBUF containing the (raw) register state | |
301 | the address in which a function should return its structure value, | |
302 | as a CORE_ADDR (or an expression that can be used as one). */ | |
303 | ||
26e9b323 | 304 | #define DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \ |
c906108c SS |
305 | (*(int *)((REGBUF) + REGISTER_BYTE (28))) |
306 | ||
307 | /* elz: Return a large value, which is stored on the stack at addr. | |
26e9b323 AC |
308 | This is defined only for the hppa, at this moment. The above macro |
309 | DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS is not called anymore, | |
310 | because it assumes that on exit from a called function which | |
311 | returns a large structure on the stack, the address of the ret | |
312 | structure is still in register 28. Unfortunately this register is | |
313 | usually overwritten by the called function itself, on hppa. This is | |
314 | specified in the calling convention doc. As far as I know, the only | |
315 | way to get the return value is to have the caller tell us where it | |
316 | told the callee to put it, rather than have the callee tell us. */ | |
61d8d407 AC |
317 | struct value *hppa_value_returned_from_stack (register struct type *valtype, |
318 | CORE_ADDR addr); | |
c906108c SS |
319 | #define VALUE_RETURNED_FROM_STACK(valtype,addr) \ |
320 | hppa_value_returned_from_stack (valtype, addr) | |
321 | ||
d709c020 JB |
322 | extern int hppa_cannot_store_register (int regnum); |
323 | #define CANNOT_STORE_REGISTER(regno) hppa_cannot_store_register (regno) | |
c906108c SS |
324 | |
325 | #define INIT_EXTRA_FRAME_INFO(fromleaf, frame) init_extra_frame_info (fromleaf, frame) | |
a14ed312 | 326 | extern void init_extra_frame_info (int, struct frame_info *); |
c906108c SS |
327 | |
328 | /* Describe the pointer in each stack frame to the previous stack frame | |
329 | (its caller). */ | |
330 | ||
f208ba17 AC |
331 | /* FRAME_CHAIN takes a frame's nominal address and produces the |
332 | frame's chain-pointer. */ | |
c906108c SS |
333 | |
334 | /* In the case of the PA-RISC, the frame's nominal address | |
335 | is the address of a 4-byte word containing the calling frame's | |
336 | address (previous FP). */ | |
337 | ||
338 | #define FRAME_CHAIN(thisframe) frame_chain (thisframe) | |
a14ed312 | 339 | extern CORE_ADDR frame_chain (struct frame_info *); |
c906108c | 340 | |
a14ed312 | 341 | extern int hppa_frame_chain_valid (CORE_ADDR, struct frame_info *); |
c906108c SS |
342 | #define FRAME_CHAIN_VALID(chain, thisframe) hppa_frame_chain_valid (chain, thisframe) |
343 | ||
c906108c SS |
344 | /* Define other aspects of the stack frame. */ |
345 | ||
346 | /* A macro that tells us whether the function invocation represented | |
347 | by FI does not have a frame on the stack associated with it. If it | |
348 | does not, FRAMELESS is set to 1, else 0. */ | |
392a587b JM |
349 | #define FRAMELESS_FUNCTION_INVOCATION(FI) \ |
350 | (frameless_function_invocation (FI)) | |
a14ed312 | 351 | extern int frameless_function_invocation (struct frame_info *); |
c906108c | 352 | |
a14ed312 | 353 | extern CORE_ADDR hppa_frame_saved_pc (struct frame_info *frame); |
c906108c SS |
354 | #define FRAME_SAVED_PC(FRAME) hppa_frame_saved_pc (FRAME) |
355 | ||
d709c020 JB |
356 | extern CORE_ADDR hppa_frame_args_address (struct frame_info *fi); |
357 | #define FRAME_ARGS_ADDRESS(fi) hppa_frame_args_address (fi) | |
358 | ||
359 | extern CORE_ADDR hppa_frame_locals_address (struct frame_info *fi); | |
360 | #define FRAME_LOCALS_ADDRESS(fi) hppa_frame_locals_address (fi) | |
c906108c | 361 | |
c906108c SS |
362 | /* Set VAL to the number of args passed to frame described by FI. |
363 | Can set VAL to -1, meaning no way to tell. */ | |
364 | ||
365 | /* We can't tell how many args there are | |
366 | now that the C compiler delays popping them. */ | |
392a587b | 367 | #define FRAME_NUM_ARGS(fi) (-1) |
c906108c SS |
368 | |
369 | /* Return number of bytes at start of arglist that are not really args. */ | |
370 | ||
371 | #define FRAME_ARGS_SKIP 0 | |
372 | ||
373 | #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \ | |
374 | hppa_frame_find_saved_regs (frame_info, &frame_saved_regs) | |
375 | extern void | |
a14ed312 | 376 | hppa_frame_find_saved_regs (struct frame_info *, struct frame_saved_regs *); |
c906108c | 377 | \f |
c5aa993b | 378 | |
c906108c SS |
379 | /* Things needed for making the inferior call functions. */ |
380 | ||
381 | /* Push an empty stack frame, to record the current PC, etc. */ | |
382 | ||
7a292a7a | 383 | #define PUSH_DUMMY_FRAME push_dummy_frame (inf_status) |
a14ed312 | 384 | extern void push_dummy_frame (struct inferior_status *); |
c906108c SS |
385 | |
386 | /* Discard from the stack the innermost frame, | |
387 | restoring all saved registers. */ | |
388 | #define POP_FRAME hppa_pop_frame () | |
a14ed312 | 389 | extern void hppa_pop_frame (void); |
c906108c SS |
390 | |
391 | #define INSTRUCTION_SIZE 4 | |
392 | ||
393 | #ifndef PA_LEVEL_0 | |
394 | ||
395 | /* Non-level zero PA's have space registers (but they don't always have | |
396 | floating-point, do they???? */ | |
397 | ||
398 | /* This sequence of words is the instructions | |
399 | ||
c5aa993b JM |
400 | ; Call stack frame has already been built by gdb. Since we could be calling |
401 | ; a varargs function, and we do not have the benefit of a stub to put things in | |
402 | ; the right place, we load the first 4 word of arguments into both the general | |
403 | ; and fp registers. | |
404 | call_dummy | |
405 | ldw -36(sp), arg0 | |
406 | ldw -40(sp), arg1 | |
407 | ldw -44(sp), arg2 | |
408 | ldw -48(sp), arg3 | |
409 | ldo -36(sp), r1 | |
410 | fldws 0(0, r1), fr4 | |
411 | fldds -4(0, r1), fr5 | |
412 | fldws -8(0, r1), fr6 | |
413 | fldds -12(0, r1), fr7 | |
414 | ldil 0, r22 ; FUNC_LDIL_OFFSET must point here | |
415 | ldo 0(r22), r22 ; FUNC_LDO_OFFSET must point here | |
416 | ldsid (0,r22), r4 | |
417 | ldil 0, r1 ; SR4EXPORT_LDIL_OFFSET must point here | |
418 | ldo 0(r1), r1 ; SR4EXPORT_LDO_OFFSET must point here | |
419 | ldsid (0,r1), r20 | |
420 | combt,=,n r4, r20, text_space ; If target is in data space, do a | |
421 | ble 0(sr5, r22) ; "normal" procedure call | |
422 | copy r31, r2 | |
423 | break 4, 8 | |
424 | mtsp r21, sr0 | |
425 | ble,n 0(sr0, r22) | |
426 | text_space ; Otherwise, go through _sr4export, | |
427 | ble (sr4, r1) ; which will return back here. | |
428 | stw r31,-24(r30) | |
429 | break 4, 8 | |
430 | mtsp r21, sr0 | |
431 | ble,n 0(sr0, r22) | |
432 | nop ; To avoid kernel bugs | |
433 | nop ; and keep the dummy 8 byte aligned | |
c906108c SS |
434 | |
435 | The dummy decides if the target is in text space or data space. If | |
436 | it's in data space, there's no problem because the target can | |
437 | return back to the dummy. However, if the target is in text space, | |
438 | the dummy calls the secret, undocumented routine _sr4export, which | |
439 | calls a function in text space and can return to any space. Instead | |
440 | of including fake instructions to represent saved registers, we | |
441 | know that the frame is associated with the call dummy and treat it | |
442 | specially. | |
443 | ||
444 | The trailing NOPs are needed to avoid a bug in HPUX, BSD and OSF1 | |
445 | kernels. If the memory at the location pointed to by the PC is | |
446 | 0xffffffff then a ptrace step call will fail (even if the instruction | |
447 | is nullified). | |
448 | ||
449 | The code to pop a dummy frame single steps three instructions | |
450 | starting with the last mtsp. This includes the nullified "instruction" | |
451 | following the ble (which is uninitialized junk). If the | |
452 | "instruction" following the last BLE is 0xffffffff, then the ptrace | |
453 | will fail and the dummy frame is not correctly popped. | |
454 | ||
455 | By placing a NOP in the delay slot of the BLE instruction we can be | |
456 | sure that we never try to execute a 0xffffffff instruction and | |
457 | avoid the kernel bug. The second NOP is needed to keep the call | |
458 | dummy 8 byte aligned. */ | |
459 | ||
460 | /* Define offsets into the call dummy for the target function address */ | |
461 | #define FUNC_LDIL_OFFSET (INSTRUCTION_SIZE * 9) | |
462 | #define FUNC_LDO_OFFSET (INSTRUCTION_SIZE * 10) | |
463 | ||
464 | /* Define offsets into the call dummy for the _sr4export address */ | |
465 | #define SR4EXPORT_LDIL_OFFSET (INSTRUCTION_SIZE * 12) | |
466 | #define SR4EXPORT_LDO_OFFSET (INSTRUCTION_SIZE * 13) | |
467 | ||
468 | #define CALL_DUMMY {0x4BDA3FB9, 0x4BD93FB1, 0x4BD83FA9, 0x4BD73FA1,\ | |
469 | 0x37C13FB9, 0x24201004, 0x2C391005, 0x24311006,\ | |
470 | 0x2C291007, 0x22C00000, 0x36D60000, 0x02C010A4,\ | |
471 | 0x20200000, 0x34210000, 0x002010b4, 0x82842022,\ | |
472 | 0xe6c06000, 0x081f0242, 0x00010004, 0x00151820,\ | |
473 | 0xe6c00002, 0xe4202000, 0x6bdf3fd1, 0x00010004,\ | |
474 | 0x00151820, 0xe6c00002, 0x08000240, 0x08000240} | |
475 | ||
476 | #define CALL_DUMMY_LENGTH (INSTRUCTION_SIZE * 28) | |
7be570e7 | 477 | #define REG_PARM_STACK_SPACE 16 |
c906108c SS |
478 | |
479 | #else /* defined PA_LEVEL_0 */ | |
480 | ||
481 | /* This is the call dummy for a level 0 PA. Level 0's don't have space | |
1faa59a8 | 482 | registers (or floating point?), so we skip all that inter-space call stuff, |
c906108c SS |
483 | and avoid touching the fp regs. |
484 | ||
c5aa993b JM |
485 | call_dummy |
486 | ||
487 | ldw -36(%sp), %arg0 | |
488 | ldw -40(%sp), %arg1 | |
489 | ldw -44(%sp), %arg2 | |
490 | ldw -48(%sp), %arg3 | |
491 | ldil 0, %r31 ; FUNC_LDIL_OFFSET must point here | |
492 | ldo 0(%r31), %r31 ; FUNC_LDO_OFFSET must point here | |
493 | ble 0(%sr0, %r31) | |
494 | copy %r31, %r2 | |
495 | break 4, 8 | |
496 | nop ; restore_pc_queue expects these | |
497 | bv,n 0(%r22) ; instructions to be here... | |
498 | nop | |
499 | */ | |
c906108c SS |
500 | |
501 | /* Define offsets into the call dummy for the target function address */ | |
502 | #define FUNC_LDIL_OFFSET (INSTRUCTION_SIZE * 4) | |
503 | #define FUNC_LDO_OFFSET (INSTRUCTION_SIZE * 5) | |
504 | ||
505 | #define CALL_DUMMY {0x4bda3fb9, 0x4bd93fb1, 0x4bd83fa9, 0x4bd73fa1,\ | |
506 | 0x23e00000, 0x37ff0000, 0xe7e00000, 0x081f0242,\ | |
507 | 0x00010004, 0x08000240, 0xeac0c002, 0x08000240} | |
508 | ||
509 | #define CALL_DUMMY_LENGTH (INSTRUCTION_SIZE * 12) | |
510 | ||
511 | #endif | |
512 | ||
513 | #define CALL_DUMMY_START_OFFSET 0 | |
514 | ||
515 | /* If we've reached a trap instruction within the call dummy, then | |
516 | we'll consider that to mean that we've reached the call dummy's | |
517 | end after its successful completion. */ | |
518 | #define CALL_DUMMY_HAS_COMPLETED(pc, sp, frame_address) \ | |
519 | (PC_IN_CALL_DUMMY((pc), (sp), (frame_address)) && \ | |
520 | (read_memory_integer((pc), 4) == BREAKPOINT32)) | |
521 | ||
522 | /* | |
523 | * Insert the specified number of args and function address | |
524 | * into a call sequence of the above form stored at DUMMYNAME. | |
525 | * | |
526 | * On the hppa we need to call the stack dummy through $$dyncall. | |
527 | * Therefore our version of FIX_CALL_DUMMY takes an extra argument, | |
528 | * real_pc, which is the location where gdb should start up the | |
529 | * inferior to do the function call. | |
530 | */ | |
531 | ||
532 | #define FIX_CALL_DUMMY hppa_fix_call_dummy | |
533 | ||
534 | extern CORE_ADDR | |
a14ed312 KB |
535 | hppa_fix_call_dummy (char *, CORE_ADDR, CORE_ADDR, int, |
536 | struct value **, struct type *, int); | |
c906108c SS |
537 | |
538 | #define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \ | |
392a587b | 539 | (hppa_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr))) |
c906108c | 540 | extern CORE_ADDR |
a14ed312 | 541 | hppa_push_arguments (int, struct value **, CORE_ADDR, int, CORE_ADDR); |
c906108c | 542 | \f |
d709c020 JB |
543 | extern CORE_ADDR hppa_smash_text_address (CORE_ADDR addr); |
544 | #define SMASH_TEXT_ADDRESS(addr) hppa_smash_text_address (addr) | |
c906108c SS |
545 | |
546 | #define GDB_TARGET_IS_HPPA | |
547 | ||
548 | #define BELIEVE_PCC_PROMOTION 1 | |
549 | ||
550 | /* | |
551 | * Unwind table and descriptor. | |
552 | */ | |
553 | ||
c5aa993b JM |
554 | struct unwind_table_entry |
555 | { | |
7be570e7 JM |
556 | CORE_ADDR region_start; |
557 | CORE_ADDR region_end; | |
c5aa993b JM |
558 | |
559 | unsigned int Cannot_unwind:1; /* 0 */ | |
560 | unsigned int Millicode:1; /* 1 */ | |
561 | unsigned int Millicode_save_sr0:1; /* 2 */ | |
562 | unsigned int Region_description:2; /* 3..4 */ | |
563 | unsigned int reserved1:1; /* 5 */ | |
564 | unsigned int Entry_SR:1; /* 6 */ | |
565 | unsigned int Entry_FR:4; /* number saved *//* 7..10 */ | |
566 | unsigned int Entry_GR:5; /* number saved *//* 11..15 */ | |
567 | unsigned int Args_stored:1; /* 16 */ | |
568 | unsigned int Variable_Frame:1; /* 17 */ | |
569 | unsigned int Separate_Package_Body:1; /* 18 */ | |
570 | unsigned int Frame_Extension_Millicode:1; /* 19 */ | |
571 | unsigned int Stack_Overflow_Check:1; /* 20 */ | |
572 | unsigned int Two_Instruction_SP_Increment:1; /* 21 */ | |
573 | unsigned int Ada_Region:1; /* 22 */ | |
574 | unsigned int cxx_info:1; /* 23 */ | |
575 | unsigned int cxx_try_catch:1; /* 24 */ | |
576 | unsigned int sched_entry_seq:1; /* 25 */ | |
577 | unsigned int reserved2:1; /* 26 */ | |
578 | unsigned int Save_SP:1; /* 27 */ | |
579 | unsigned int Save_RP:1; /* 28 */ | |
580 | unsigned int Save_MRP_in_frame:1; /* 29 */ | |
581 | unsigned int extn_ptr_defined:1; /* 30 */ | |
582 | unsigned int Cleanup_defined:1; /* 31 */ | |
583 | ||
584 | unsigned int MPE_XL_interrupt_marker:1; /* 0 */ | |
585 | unsigned int HP_UX_interrupt_marker:1; /* 1 */ | |
586 | unsigned int Large_frame:1; /* 2 */ | |
587 | unsigned int Pseudo_SP_Set:1; /* 3 */ | |
588 | unsigned int reserved4:1; /* 4 */ | |
589 | unsigned int Total_frame_size:27; /* 5..31 */ | |
590 | ||
591 | /* This is *NOT* part of an actual unwind_descriptor in an object | |
592 | file. It is *ONLY* part of the "internalized" descriptors that | |
593 | we create from those in a file. | |
c906108c | 594 | */ |
c5aa993b JM |
595 | struct |
596 | { | |
597 | unsigned int stub_type:4; /* 0..3 */ | |
598 | unsigned int padding:28; /* 4..31 */ | |
599 | } | |
600 | stub_unwind; | |
601 | }; | |
c906108c SS |
602 | |
603 | /* HP linkers also generate unwinds for various linker-generated stubs. | |
604 | GDB reads in the stubs from the $UNWIND_END$ subspace, then | |
605 | "converts" them into normal unwind entries using some of the reserved | |
606 | fields to store the stub type. */ | |
607 | ||
608 | struct stub_unwind_entry | |
c5aa993b JM |
609 | { |
610 | /* The offset within the executable for the associated stub. */ | |
611 | unsigned stub_offset; | |
c906108c | 612 | |
c5aa993b JM |
613 | /* The type of stub this unwind entry describes. */ |
614 | char type; | |
c906108c | 615 | |
c5aa993b JM |
616 | /* Unknown. Not needed by GDB at this time. */ |
617 | char prs_info; | |
c906108c | 618 | |
c5aa993b JM |
619 | /* Length (in instructions) of the associated stub. */ |
620 | short stub_length; | |
621 | }; | |
c906108c SS |
622 | |
623 | /* Sizes (in bytes) of the native unwind entries. */ | |
624 | #define UNWIND_ENTRY_SIZE 16 | |
625 | #define STUB_UNWIND_ENTRY_SIZE 8 | |
626 | ||
627 | /* The gaps represent linker stubs used in MPE and space for future | |
628 | expansion. */ | |
629 | enum unwind_stub_types | |
c5aa993b JM |
630 | { |
631 | LONG_BRANCH = 1, | |
632 | PARAMETER_RELOCATION = 2, | |
633 | EXPORT = 10, | |
634 | IMPORT = 11, | |
635 | IMPORT_SHLIB = 12, | |
636 | }; | |
c906108c SS |
637 | |
638 | /* We use the objfile->obj_private pointer for two things: | |
c5aa993b | 639 | |
c906108c SS |
640 | * 1. An unwind table; |
641 | * | |
642 | * 2. A pointer to any associated shared library object. | |
643 | * | |
644 | * #defines are used to help refer to these objects. | |
645 | */ | |
c5aa993b | 646 | |
c906108c | 647 | /* Info about the unwind table associated with an object file. |
c5aa993b | 648 | |
c906108c SS |
649 | * This is hung off of the "objfile->obj_private" pointer, and |
650 | * is allocated in the objfile's psymbol obstack. This allows | |
651 | * us to have unique unwind info for each executable and shared | |
652 | * library that we are debugging. | |
653 | */ | |
c5aa993b JM |
654 | struct obj_unwind_info |
655 | { | |
656 | struct unwind_table_entry *table; /* Pointer to unwind info */ | |
657 | struct unwind_table_entry *cache; /* Pointer to last entry we found */ | |
658 | int last; /* Index of last entry */ | |
659 | }; | |
660 | ||
661 | typedef struct obj_private_struct | |
662 | { | |
663 | struct obj_unwind_info *unwind_info; /* a pointer */ | |
664 | struct so_list *so_info; /* a pointer */ | |
53a5351d | 665 | CORE_ADDR dp; |
c5aa993b JM |
666 | } |
667 | obj_private_data_t; | |
c906108c SS |
668 | |
669 | #if 0 | |
a14ed312 KB |
670 | extern void target_write_pc (CORE_ADDR, int); |
671 | extern CORE_ADDR target_read_pc (int); | |
672 | extern CORE_ADDR skip_trampoline_code (CORE_ADDR, char *); | |
c906108c SS |
673 | #endif |
674 | ||
675 | #define TARGET_READ_PC(pid) target_read_pc (pid) | |
39f77062 | 676 | extern CORE_ADDR target_read_pc (ptid_t); |
c906108c SS |
677 | |
678 | #define TARGET_WRITE_PC(v,pid) target_write_pc (v,pid) | |
39f77062 | 679 | extern void target_write_pc (CORE_ADDR, ptid_t); |
c906108c | 680 | |
39f77062 | 681 | #define TARGET_READ_FP() target_read_fp (PIDGET (inferior_ptid)) |
a14ed312 | 682 | extern CORE_ADDR target_read_fp (int); |
c906108c SS |
683 | |
684 | /* For a number of horrible reasons we may have to adjust the location | |
685 | of variables on the stack. Ugh. */ | |
686 | #define HPREAD_ADJUST_STACK_ADDRESS(ADDR) hpread_adjust_stack_address(ADDR) | |
687 | ||
a14ed312 | 688 | extern int hpread_adjust_stack_address (CORE_ADDR); |
c906108c SS |
689 | |
690 | /* If the current gcc for for this target does not produce correct debugging | |
691 | information for float parameters, both prototyped and unprototyped, then | |
692 | define this macro. This forces gdb to always assume that floats are | |
d709c020 | 693 | passed as doubles and then converted in the callee. */ |
c906108c | 694 | |
d709c020 JB |
695 | extern int hppa_coerce_float_to_double (struct type *formal, |
696 | struct type *actual); | |
697 | #define COERCE_FLOAT_TO_DOUBLE(formal, actual) \ | |
698 | hppa_coerce_float_to_double (formal, actual) | |
c2c6d25f JM |
699 | |
700 | /* Here's how to step off a permanent breakpoint. */ | |
701 | #define SKIP_PERMANENT_BREAKPOINT (hppa_skip_permanent_breakpoint) | |
702 | extern void hppa_skip_permanent_breakpoint (void); | |
2df3850c JM |
703 | |
704 | /* On HP-UX, certain system routines (millicode) have names beginning | |
705 | with $ or $$, e.g. $$dyncall, which handles inter-space procedure | |
706 | calls on PA-RISC. Tell the expression parser to check for those | |
707 | when parsing tokens that begin with "$". */ | |
708 | #define SYMBOLS_CAN_START_WITH_DOLLAR (1) |