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16461d7d | 1 | /* Target-dependent code for the IA-64 for GDB, the GNU debugger. |
8e65ff28 | 2 | Copyright 1999, 2000, 2001 |
16461d7d KB |
3 | Free Software Foundation, Inc. |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "symfile.h" /* for entry_point_address */ | |
25 | #include "gdbcore.h" | |
8064c6ae | 26 | #include "arch-utils.h" |
16461d7d | 27 | #include "floatformat.h" |
4e052eda | 28 | #include "regcache.h" |
d16aafd8 | 29 | #include "doublest.h" |
16461d7d KB |
30 | |
31 | #include "objfiles.h" | |
32 | #include "elf/common.h" /* for DT_PLTGOT value */ | |
244bc108 | 33 | #include "elf-bfd.h" |
16461d7d | 34 | |
698cb3f0 KB |
35 | /* Hook for determining the global pointer when calling functions in |
36 | the inferior under AIX. The initialization code in ia64-aix-nat.c | |
37 | sets this hook to the address of a function which will find the | |
38 | global pointer for a given address. | |
39 | ||
40 | The generic code which uses the dynamic section in the inferior for | |
41 | finding the global pointer is not of much use on AIX since the | |
42 | values obtained from the inferior have not been relocated. */ | |
43 | ||
44 | CORE_ADDR (*native_find_global_pointer) (CORE_ADDR) = 0; | |
45 | ||
46 | /* An enumeration of the different IA-64 instruction types. */ | |
47 | ||
16461d7d KB |
48 | typedef enum instruction_type |
49 | { | |
50 | A, /* Integer ALU ; I-unit or M-unit */ | |
51 | I, /* Non-ALU integer; I-unit */ | |
52 | M, /* Memory ; M-unit */ | |
53 | F, /* Floating-point ; F-unit */ | |
54 | B, /* Branch ; B-unit */ | |
55 | L, /* Extended (L+X) ; I-unit */ | |
56 | X, /* Extended (L+X) ; I-unit */ | |
57 | undefined /* undefined or reserved */ | |
58 | } instruction_type; | |
59 | ||
60 | /* We represent IA-64 PC addresses as the value of the instruction | |
61 | pointer or'd with some bit combination in the low nibble which | |
62 | represents the slot number in the bundle addressed by the | |
63 | instruction pointer. The problem is that the Linux kernel | |
64 | multiplies its slot numbers (for exceptions) by one while the | |
65 | disassembler multiplies its slot numbers by 6. In addition, I've | |
66 | heard it said that the simulator uses 1 as the multiplier. | |
67 | ||
68 | I've fixed the disassembler so that the bytes_per_line field will | |
69 | be the slot multiplier. If bytes_per_line comes in as zero, it | |
70 | is set to six (which is how it was set up initially). -- objdump | |
71 | displays pretty disassembly dumps with this value. For our purposes, | |
72 | we'll set bytes_per_line to SLOT_MULTIPLIER. This is okay since we | |
73 | never want to also display the raw bytes the way objdump does. */ | |
74 | ||
75 | #define SLOT_MULTIPLIER 1 | |
76 | ||
77 | /* Length in bytes of an instruction bundle */ | |
78 | ||
79 | #define BUNDLE_LEN 16 | |
80 | ||
d7fa2ae2 | 81 | /* FIXME: These extern declarations should go in ia64-tdep.h. */ |
244bc108 | 82 | extern CORE_ADDR ia64_linux_sigcontext_register_address (CORE_ADDR, int); |
d7fa2ae2 | 83 | extern CORE_ADDR ia64_aix_sigcontext_register_address (CORE_ADDR, int); |
244bc108 | 84 | |
16461d7d KB |
85 | static gdbarch_init_ftype ia64_gdbarch_init; |
86 | ||
87 | static gdbarch_register_name_ftype ia64_register_name; | |
88 | static gdbarch_register_raw_size_ftype ia64_register_raw_size; | |
89 | static gdbarch_register_virtual_size_ftype ia64_register_virtual_size; | |
90 | static gdbarch_register_virtual_type_ftype ia64_register_virtual_type; | |
91 | static gdbarch_register_byte_ftype ia64_register_byte; | |
92 | static gdbarch_breakpoint_from_pc_ftype ia64_breakpoint_from_pc; | |
93 | static gdbarch_frame_chain_ftype ia64_frame_chain; | |
94 | static gdbarch_frame_saved_pc_ftype ia64_frame_saved_pc; | |
95 | static gdbarch_skip_prologue_ftype ia64_skip_prologue; | |
96 | static gdbarch_frame_init_saved_regs_ftype ia64_frame_init_saved_regs; | |
97 | static gdbarch_get_saved_register_ftype ia64_get_saved_register; | |
98 | static gdbarch_extract_return_value_ftype ia64_extract_return_value; | |
99 | static gdbarch_extract_struct_value_address_ftype ia64_extract_struct_value_address; | |
100 | static gdbarch_use_struct_convention_ftype ia64_use_struct_convention; | |
101 | static gdbarch_frameless_function_invocation_ftype ia64_frameless_function_invocation; | |
102 | static gdbarch_init_extra_frame_info_ftype ia64_init_extra_frame_info; | |
103 | static gdbarch_store_return_value_ftype ia64_store_return_value; | |
104 | static gdbarch_store_struct_return_ftype ia64_store_struct_return; | |
105 | static gdbarch_push_arguments_ftype ia64_push_arguments; | |
106 | static gdbarch_push_return_address_ftype ia64_push_return_address; | |
107 | static gdbarch_pop_frame_ftype ia64_pop_frame; | |
108 | static gdbarch_saved_pc_after_call_ftype ia64_saved_pc_after_call; | |
16461d7d | 109 | static void ia64_pop_frame_regular (struct frame_info *frame); |
64a5b29c | 110 | static struct type *is_float_or_hfa_type (struct type *t); |
16461d7d KB |
111 | |
112 | static int ia64_num_regs = 590; | |
113 | ||
114 | static int pc_regnum = IA64_IP_REGNUM; | |
115 | static int sp_regnum = IA64_GR12_REGNUM; | |
116 | static int fp_regnum = IA64_VFP_REGNUM; | |
117 | static int lr_regnum = IA64_VRAP_REGNUM; | |
118 | ||
119 | static LONGEST ia64_call_dummy_words[] = {0}; | |
120 | ||
121 | /* Array of register names; There should be ia64_num_regs strings in | |
122 | the initializer. */ | |
123 | ||
124 | static char *ia64_register_names[] = | |
125 | { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
126 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
127 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
128 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
129 | "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39", | |
130 | "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47", | |
131 | "r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55", | |
132 | "r56", "r57", "r58", "r59", "r60", "r61", "r62", "r63", | |
133 | "r64", "r65", "r66", "r67", "r68", "r69", "r70", "r71", | |
134 | "r72", "r73", "r74", "r75", "r76", "r77", "r78", "r79", | |
135 | "r80", "r81", "r82", "r83", "r84", "r85", "r86", "r87", | |
136 | "r88", "r89", "r90", "r91", "r92", "r93", "r94", "r95", | |
137 | "r96", "r97", "r98", "r99", "r100", "r101", "r102", "r103", | |
138 | "r104", "r105", "r106", "r107", "r108", "r109", "r110", "r111", | |
139 | "r112", "r113", "r114", "r115", "r116", "r117", "r118", "r119", | |
140 | "r120", "r121", "r122", "r123", "r124", "r125", "r126", "r127", | |
141 | ||
142 | "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", | |
143 | "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", | |
144 | "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", | |
145 | "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", | |
146 | "f32", "f33", "f34", "f35", "f36", "f37", "f38", "f39", | |
147 | "f40", "f41", "f42", "f43", "f44", "f45", "f46", "f47", | |
148 | "f48", "f49", "f50", "f51", "f52", "f53", "f54", "f55", | |
149 | "f56", "f57", "f58", "f59", "f60", "f61", "f62", "f63", | |
150 | "f64", "f65", "f66", "f67", "f68", "f69", "f70", "f71", | |
151 | "f72", "f73", "f74", "f75", "f76", "f77", "f78", "f79", | |
152 | "f80", "f81", "f82", "f83", "f84", "f85", "f86", "f87", | |
153 | "f88", "f89", "f90", "f91", "f92", "f93", "f94", "f95", | |
154 | "f96", "f97", "f98", "f99", "f100", "f101", "f102", "f103", | |
155 | "f104", "f105", "f106", "f107", "f108", "f109", "f110", "f111", | |
156 | "f112", "f113", "f114", "f115", "f116", "f117", "f118", "f119", | |
157 | "f120", "f121", "f122", "f123", "f124", "f125", "f126", "f127", | |
158 | ||
159 | "p0", "p1", "p2", "p3", "p4", "p5", "p6", "p7", | |
160 | "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15", | |
161 | "p16", "p17", "p18", "p19", "p20", "p21", "p22", "p23", | |
162 | "p24", "p25", "p26", "p27", "p28", "p29", "p30", "p31", | |
163 | "p32", "p33", "p34", "p35", "p36", "p37", "p38", "p39", | |
164 | "p40", "p41", "p42", "p43", "p44", "p45", "p46", "p47", | |
165 | "p48", "p49", "p50", "p51", "p52", "p53", "p54", "p55", | |
166 | "p56", "p57", "p58", "p59", "p60", "p61", "p62", "p63", | |
167 | ||
168 | "b0", "b1", "b2", "b3", "b4", "b5", "b6", "b7", | |
169 | ||
170 | "vfp", "vrap", | |
171 | ||
172 | "pr", "ip", "psr", "cfm", | |
173 | ||
174 | "kr0", "kr1", "kr2", "kr3", "kr4", "kr5", "kr6", "kr7", | |
175 | "", "", "", "", "", "", "", "", | |
176 | "rsc", "bsp", "bspstore", "rnat", | |
177 | "", "fcr", "", "", | |
178 | "eflag", "csd", "ssd", "cflg", "fsr", "fir", "fdr", "", | |
179 | "ccv", "", "", "", "unat", "", "", "", | |
180 | "fpsr", "", "", "", "itc", | |
181 | "", "", "", "", "", "", "", "", "", "", | |
182 | "", "", "", "", "", "", "", "", "", | |
183 | "pfs", "lc", "ec", | |
184 | "", "", "", "", "", "", "", "", "", "", | |
185 | "", "", "", "", "", "", "", "", "", "", | |
186 | "", "", "", "", "", "", "", "", "", "", | |
187 | "", "", "", "", "", "", "", "", "", "", | |
188 | "", "", "", "", "", "", "", "", "", "", | |
189 | "", "", "", "", "", "", "", "", "", "", | |
190 | "", | |
191 | "nat0", "nat1", "nat2", "nat3", "nat4", "nat5", "nat6", "nat7", | |
192 | "nat8", "nat9", "nat10", "nat11", "nat12", "nat13", "nat14", "nat15", | |
193 | "nat16", "nat17", "nat18", "nat19", "nat20", "nat21", "nat22", "nat23", | |
194 | "nat24", "nat25", "nat26", "nat27", "nat28", "nat29", "nat30", "nat31", | |
195 | "nat32", "nat33", "nat34", "nat35", "nat36", "nat37", "nat38", "nat39", | |
196 | "nat40", "nat41", "nat42", "nat43", "nat44", "nat45", "nat46", "nat47", | |
197 | "nat48", "nat49", "nat50", "nat51", "nat52", "nat53", "nat54", "nat55", | |
198 | "nat56", "nat57", "nat58", "nat59", "nat60", "nat61", "nat62", "nat63", | |
199 | "nat64", "nat65", "nat66", "nat67", "nat68", "nat69", "nat70", "nat71", | |
200 | "nat72", "nat73", "nat74", "nat75", "nat76", "nat77", "nat78", "nat79", | |
201 | "nat80", "nat81", "nat82", "nat83", "nat84", "nat85", "nat86", "nat87", | |
202 | "nat88", "nat89", "nat90", "nat91", "nat92", "nat93", "nat94", "nat95", | |
203 | "nat96", "nat97", "nat98", "nat99", "nat100","nat101","nat102","nat103", | |
204 | "nat104","nat105","nat106","nat107","nat108","nat109","nat110","nat111", | |
205 | "nat112","nat113","nat114","nat115","nat116","nat117","nat118","nat119", | |
206 | "nat120","nat121","nat122","nat123","nat124","nat125","nat126","nat127", | |
207 | }; | |
208 | ||
209 | struct frame_extra_info | |
244bc108 KB |
210 | { |
211 | CORE_ADDR bsp; /* points at r32 for the current frame */ | |
212 | CORE_ADDR cfm; /* cfm value for current frame */ | |
213 | int sof; /* Size of frame (decoded from cfm value) */ | |
214 | int sol; /* Size of locals (decoded from cfm value) */ | |
215 | CORE_ADDR after_prologue; | |
216 | /* Address of first instruction after the last | |
16461d7d KB |
217 | prologue instruction; Note that there may |
218 | be instructions from the function's body | |
219 | intermingled with the prologue. */ | |
244bc108 KB |
220 | int mem_stack_frame_size; |
221 | /* Size of the memory stack frame (may be zero), | |
16461d7d | 222 | or -1 if it has not been determined yet. */ |
244bc108 KB |
223 | int fp_reg; /* Register number (if any) used a frame pointer |
224 | for this frame. 0 if no register is being used | |
16461d7d | 225 | as the frame pointer. */ |
244bc108 KB |
226 | }; |
227 | ||
228 | struct gdbarch_tdep | |
229 | { | |
230 | int os_ident; /* From the ELF header, one of the ELFOSABI_ | |
ef58a6ac | 231 | constants: ELFOSABI_LINUX, ELFOSABI_AIX, |
244bc108 KB |
232 | etc. */ |
233 | CORE_ADDR (*sigcontext_register_address) (CORE_ADDR, int); | |
234 | /* OS specific function which, given a frame address | |
235 | and register number, returns the offset to the | |
236 | given register from the start of the frame. */ | |
698cb3f0 | 237 | CORE_ADDR (*find_global_pointer) (CORE_ADDR); |
244bc108 KB |
238 | }; |
239 | ||
698cb3f0 KB |
240 | #define SIGCONTEXT_REGISTER_ADDRESS \ |
241 | (gdbarch_tdep (current_gdbarch)->sigcontext_register_address) | |
242 | #define FIND_GLOBAL_POINTER \ | |
243 | (gdbarch_tdep (current_gdbarch)->find_global_pointer) | |
16461d7d KB |
244 | |
245 | static char * | |
246 | ia64_register_name (int reg) | |
247 | { | |
248 | return ia64_register_names[reg]; | |
249 | } | |
250 | ||
251 | int | |
252 | ia64_register_raw_size (int reg) | |
253 | { | |
254 | return (IA64_FR0_REGNUM <= reg && reg <= IA64_FR127_REGNUM) ? 16 : 8; | |
255 | } | |
256 | ||
257 | int | |
258 | ia64_register_virtual_size (int reg) | |
259 | { | |
260 | return (IA64_FR0_REGNUM <= reg && reg <= IA64_FR127_REGNUM) ? 16 : 8; | |
261 | } | |
262 | ||
263 | /* Return true iff register N's virtual format is different from | |
264 | its raw format. */ | |
265 | int | |
266 | ia64_register_convertible (int nr) | |
267 | { | |
268 | return (IA64_FR0_REGNUM <= nr && nr <= IA64_FR127_REGNUM); | |
269 | } | |
270 | ||
271 | const struct floatformat floatformat_ia64_ext = | |
272 | { | |
273 | floatformat_little, 82, 0, 1, 17, 65535, 0x1ffff, 18, 64, | |
274 | floatformat_intbit_yes | |
275 | }; | |
276 | ||
277 | void | |
278 | ia64_register_convert_to_virtual (int regnum, struct type *type, | |
279 | char *from, char *to) | |
280 | { | |
281 | if (regnum >= IA64_FR0_REGNUM && regnum <= IA64_FR127_REGNUM) | |
282 | { | |
283 | DOUBLEST val; | |
284 | floatformat_to_doublest (&floatformat_ia64_ext, from, &val); | |
285 | store_floating(to, TYPE_LENGTH(type), val); | |
286 | } | |
287 | else | |
288 | error("ia64_register_convert_to_virtual called with non floating point register number"); | |
289 | } | |
290 | ||
291 | void | |
292 | ia64_register_convert_to_raw (struct type *type, int regnum, | |
293 | char *from, char *to) | |
294 | { | |
295 | if (regnum >= IA64_FR0_REGNUM && regnum <= IA64_FR127_REGNUM) | |
296 | { | |
297 | DOUBLEST val = extract_floating (from, TYPE_LENGTH(type)); | |
298 | floatformat_from_doublest (&floatformat_ia64_ext, &val, to); | |
299 | } | |
300 | else | |
301 | error("ia64_register_convert_to_raw called with non floating point register number"); | |
302 | } | |
303 | ||
304 | struct type * | |
305 | ia64_register_virtual_type (int reg) | |
306 | { | |
307 | if (reg >= IA64_FR0_REGNUM && reg <= IA64_FR127_REGNUM) | |
308 | return builtin_type_long_double; | |
309 | else | |
310 | return builtin_type_long; | |
311 | } | |
312 | ||
313 | int | |
314 | ia64_register_byte (int reg) | |
315 | { | |
316 | return (8 * reg) + | |
317 | (reg <= IA64_FR0_REGNUM ? 0 : 8 * ((reg > IA64_FR127_REGNUM) ? 128 : reg - IA64_FR0_REGNUM)); | |
318 | } | |
319 | ||
244bc108 KB |
320 | /* Read the given register from a sigcontext structure in the |
321 | specified frame. */ | |
322 | ||
323 | static CORE_ADDR | |
324 | read_sigcontext_register (struct frame_info *frame, int regnum) | |
325 | { | |
326 | CORE_ADDR regaddr; | |
327 | ||
328 | if (frame == NULL) | |
8e65ff28 AC |
329 | internal_error (__FILE__, __LINE__, |
330 | "read_sigcontext_register: NULL frame"); | |
244bc108 | 331 | if (!frame->signal_handler_caller) |
8e65ff28 AC |
332 | internal_error (__FILE__, __LINE__, |
333 | "read_sigcontext_register: frame not a signal_handler_caller"); | |
244bc108 | 334 | if (SIGCONTEXT_REGISTER_ADDRESS == 0) |
8e65ff28 AC |
335 | internal_error (__FILE__, __LINE__, |
336 | "read_sigcontext_register: SIGCONTEXT_REGISTER_ADDRESS is 0"); | |
244bc108 KB |
337 | |
338 | regaddr = SIGCONTEXT_REGISTER_ADDRESS (frame->frame, regnum); | |
339 | if (regaddr) | |
340 | return read_memory_integer (regaddr, REGISTER_RAW_SIZE (regnum)); | |
341 | else | |
8e65ff28 AC |
342 | internal_error (__FILE__, __LINE__, |
343 | "read_sigcontext_register: Register %d not in struct sigcontext", regnum); | |
244bc108 KB |
344 | } |
345 | ||
16461d7d KB |
346 | /* Extract ``len'' bits from an instruction bundle starting at |
347 | bit ``from''. */ | |
348 | ||
244bc108 | 349 | static long long |
16461d7d KB |
350 | extract_bit_field (char *bundle, int from, int len) |
351 | { | |
352 | long long result = 0LL; | |
353 | int to = from + len; | |
354 | int from_byte = from / 8; | |
355 | int to_byte = to / 8; | |
356 | unsigned char *b = (unsigned char *) bundle; | |
357 | unsigned char c; | |
358 | int lshift; | |
359 | int i; | |
360 | ||
361 | c = b[from_byte]; | |
362 | if (from_byte == to_byte) | |
363 | c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8); | |
364 | result = c >> (from % 8); | |
365 | lshift = 8 - (from % 8); | |
366 | ||
367 | for (i = from_byte+1; i < to_byte; i++) | |
368 | { | |
369 | result |= ((long long) b[i]) << lshift; | |
370 | lshift += 8; | |
371 | } | |
372 | ||
373 | if (from_byte < to_byte && (to % 8 != 0)) | |
374 | { | |
375 | c = b[to_byte]; | |
376 | c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8); | |
377 | result |= ((long long) c) << lshift; | |
378 | } | |
379 | ||
380 | return result; | |
381 | } | |
382 | ||
383 | /* Replace the specified bits in an instruction bundle */ | |
384 | ||
244bc108 | 385 | static void |
16461d7d KB |
386 | replace_bit_field (char *bundle, long long val, int from, int len) |
387 | { | |
388 | int to = from + len; | |
389 | int from_byte = from / 8; | |
390 | int to_byte = to / 8; | |
391 | unsigned char *b = (unsigned char *) bundle; | |
392 | unsigned char c; | |
393 | ||
394 | if (from_byte == to_byte) | |
395 | { | |
396 | unsigned char left, right; | |
397 | c = b[from_byte]; | |
398 | left = (c >> (to % 8)) << (to % 8); | |
399 | right = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8); | |
400 | c = (unsigned char) (val & 0xff); | |
401 | c = (unsigned char) (c << (from % 8 + 8 - to % 8)) >> (8 - to % 8); | |
402 | c |= right | left; | |
403 | b[from_byte] = c; | |
404 | } | |
405 | else | |
406 | { | |
407 | int i; | |
408 | c = b[from_byte]; | |
409 | c = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8); | |
410 | c = c | (val << (from % 8)); | |
411 | b[from_byte] = c; | |
412 | val >>= 8 - from % 8; | |
413 | ||
414 | for (i = from_byte+1; i < to_byte; i++) | |
415 | { | |
416 | c = val & 0xff; | |
417 | val >>= 8; | |
418 | b[i] = c; | |
419 | } | |
420 | ||
421 | if (to % 8 != 0) | |
422 | { | |
423 | unsigned char cv = (unsigned char) val; | |
424 | c = b[to_byte]; | |
425 | c = c >> (to % 8) << (to % 8); | |
426 | c |= ((unsigned char) (cv << (8 - to % 8))) >> (8 - to % 8); | |
427 | b[to_byte] = c; | |
428 | } | |
429 | } | |
430 | } | |
431 | ||
432 | /* Return the contents of slot N (for N = 0, 1, or 2) in | |
433 | and instruction bundle */ | |
434 | ||
244bc108 | 435 | static long long |
2fc3ac7e | 436 | slotN_contents (char *bundle, int slotnum) |
16461d7d KB |
437 | { |
438 | return extract_bit_field (bundle, 5+41*slotnum, 41); | |
439 | } | |
440 | ||
441 | /* Store an instruction in an instruction bundle */ | |
442 | ||
244bc108 | 443 | static void |
2fc3ac7e | 444 | replace_slotN_contents (char *bundle, long long instr, int slotnum) |
16461d7d KB |
445 | { |
446 | replace_bit_field (bundle, instr, 5+41*slotnum, 41); | |
447 | } | |
448 | ||
64a5b29c | 449 | static enum instruction_type template_encoding_table[32][3] = |
16461d7d KB |
450 | { |
451 | { M, I, I }, /* 00 */ | |
452 | { M, I, I }, /* 01 */ | |
453 | { M, I, I }, /* 02 */ | |
454 | { M, I, I }, /* 03 */ | |
455 | { M, L, X }, /* 04 */ | |
456 | { M, L, X }, /* 05 */ | |
457 | { undefined, undefined, undefined }, /* 06 */ | |
458 | { undefined, undefined, undefined }, /* 07 */ | |
459 | { M, M, I }, /* 08 */ | |
460 | { M, M, I }, /* 09 */ | |
461 | { M, M, I }, /* 0A */ | |
462 | { M, M, I }, /* 0B */ | |
463 | { M, F, I }, /* 0C */ | |
464 | { M, F, I }, /* 0D */ | |
465 | { M, M, F }, /* 0E */ | |
466 | { M, M, F }, /* 0F */ | |
467 | { M, I, B }, /* 10 */ | |
468 | { M, I, B }, /* 11 */ | |
469 | { M, B, B }, /* 12 */ | |
470 | { M, B, B }, /* 13 */ | |
471 | { undefined, undefined, undefined }, /* 14 */ | |
472 | { undefined, undefined, undefined }, /* 15 */ | |
473 | { B, B, B }, /* 16 */ | |
474 | { B, B, B }, /* 17 */ | |
475 | { M, M, B }, /* 18 */ | |
476 | { M, M, B }, /* 19 */ | |
477 | { undefined, undefined, undefined }, /* 1A */ | |
478 | { undefined, undefined, undefined }, /* 1B */ | |
479 | { M, F, B }, /* 1C */ | |
480 | { M, F, B }, /* 1D */ | |
481 | { undefined, undefined, undefined }, /* 1E */ | |
482 | { undefined, undefined, undefined }, /* 1F */ | |
483 | }; | |
484 | ||
485 | /* Fetch and (partially) decode an instruction at ADDR and return the | |
486 | address of the next instruction to fetch. */ | |
487 | ||
488 | static CORE_ADDR | |
489 | fetch_instruction (CORE_ADDR addr, instruction_type *it, long long *instr) | |
490 | { | |
491 | char bundle[BUNDLE_LEN]; | |
492 | int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER; | |
493 | long long template; | |
494 | int val; | |
495 | ||
c26e1c2b KB |
496 | /* Warn about slot numbers greater than 2. We used to generate |
497 | an error here on the assumption that the user entered an invalid | |
498 | address. But, sometimes GDB itself requests an invalid address. | |
499 | This can (easily) happen when execution stops in a function for | |
500 | which there are no symbols. The prologue scanner will attempt to | |
501 | find the beginning of the function - if the nearest symbol | |
502 | happens to not be aligned on a bundle boundary (16 bytes), the | |
503 | resulting starting address will cause GDB to think that the slot | |
504 | number is too large. | |
505 | ||
506 | So we warn about it and set the slot number to zero. It is | |
507 | not necessarily a fatal condition, particularly if debugging | |
508 | at the assembly language level. */ | |
16461d7d | 509 | if (slotnum > 2) |
c26e1c2b KB |
510 | { |
511 | warning ("Can't fetch instructions for slot numbers greater than 2.\n" | |
512 | "Using slot 0 instead"); | |
513 | slotnum = 0; | |
514 | } | |
16461d7d KB |
515 | |
516 | addr &= ~0x0f; | |
517 | ||
518 | val = target_read_memory (addr, bundle, BUNDLE_LEN); | |
519 | ||
520 | if (val != 0) | |
521 | return 0; | |
522 | ||
523 | *instr = slotN_contents (bundle, slotnum); | |
524 | template = extract_bit_field (bundle, 0, 5); | |
525 | *it = template_encoding_table[(int)template][slotnum]; | |
526 | ||
64a5b29c | 527 | if (slotnum == 2 || (slotnum == 1 && *it == L)) |
16461d7d KB |
528 | addr += 16; |
529 | else | |
530 | addr += (slotnum + 1) * SLOT_MULTIPLIER; | |
531 | ||
532 | return addr; | |
533 | } | |
534 | ||
535 | /* There are 5 different break instructions (break.i, break.b, | |
536 | break.m, break.f, and break.x), but they all have the same | |
537 | encoding. (The five bit template in the low five bits of the | |
538 | instruction bundle distinguishes one from another.) | |
539 | ||
540 | The runtime architecture manual specifies that break instructions | |
541 | used for debugging purposes must have the upper two bits of the 21 | |
542 | bit immediate set to a 0 and a 1 respectively. A breakpoint | |
543 | instruction encodes the most significant bit of its 21 bit | |
544 | immediate at bit 36 of the 41 bit instruction. The penultimate msb | |
545 | is at bit 25 which leads to the pattern below. | |
546 | ||
547 | Originally, I had this set up to do, e.g, a "break.i 0x80000" But | |
548 | it turns out that 0x80000 was used as the syscall break in the early | |
549 | simulators. So I changed the pattern slightly to do "break.i 0x080001" | |
550 | instead. But that didn't work either (I later found out that this | |
551 | pattern was used by the simulator that I was using.) So I ended up | |
552 | using the pattern seen below. */ | |
553 | ||
554 | #if 0 | |
555 | #define BREAKPOINT 0x00002000040LL | |
556 | #endif | |
557 | #define BREAKPOINT 0x00003333300LL | |
558 | ||
559 | static int | |
560 | ia64_memory_insert_breakpoint (CORE_ADDR addr, char *contents_cache) | |
561 | { | |
562 | char bundle[BUNDLE_LEN]; | |
563 | int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER; | |
564 | long long instr; | |
565 | int val; | |
566 | ||
567 | if (slotnum > 2) | |
568 | error("Can't insert breakpoint for slot numbers greater than 2."); | |
569 | ||
570 | addr &= ~0x0f; | |
571 | ||
572 | val = target_read_memory (addr, bundle, BUNDLE_LEN); | |
573 | instr = slotN_contents (bundle, slotnum); | |
574 | memcpy(contents_cache, &instr, sizeof(instr)); | |
575 | replace_slotN_contents (bundle, BREAKPOINT, slotnum); | |
576 | if (val == 0) | |
577 | target_write_memory (addr, bundle, BUNDLE_LEN); | |
578 | ||
579 | return val; | |
580 | } | |
581 | ||
582 | static int | |
583 | ia64_memory_remove_breakpoint (CORE_ADDR addr, char *contents_cache) | |
584 | { | |
585 | char bundle[BUNDLE_LEN]; | |
586 | int slotnum = (addr & 0x0f) / SLOT_MULTIPLIER; | |
587 | long long instr; | |
588 | int val; | |
589 | ||
590 | addr &= ~0x0f; | |
591 | ||
592 | val = target_read_memory (addr, bundle, BUNDLE_LEN); | |
593 | memcpy (&instr, contents_cache, sizeof instr); | |
594 | replace_slotN_contents (bundle, instr, slotnum); | |
595 | if (val == 0) | |
596 | target_write_memory (addr, bundle, BUNDLE_LEN); | |
597 | ||
598 | return val; | |
599 | } | |
600 | ||
601 | /* We don't really want to use this, but remote.c needs to call it in order | |
602 | to figure out if Z-packets are supported or not. Oh, well. */ | |
603 | unsigned char * | |
fba45db2 | 604 | ia64_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) |
16461d7d KB |
605 | { |
606 | static unsigned char breakpoint[] = | |
607 | { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; | |
608 | *lenptr = sizeof (breakpoint); | |
609 | #if 0 | |
610 | *pcptr &= ~0x0f; | |
611 | #endif | |
612 | return breakpoint; | |
613 | } | |
614 | ||
615 | CORE_ADDR | |
39f77062 | 616 | ia64_read_pc (ptid_t ptid) |
16461d7d | 617 | { |
39f77062 KB |
618 | CORE_ADDR psr_value = read_register_pid (IA64_PSR_REGNUM, ptid); |
619 | CORE_ADDR pc_value = read_register_pid (IA64_IP_REGNUM, ptid); | |
16461d7d KB |
620 | int slot_num = (psr_value >> 41) & 3; |
621 | ||
622 | return pc_value | (slot_num * SLOT_MULTIPLIER); | |
623 | } | |
624 | ||
625 | void | |
39f77062 | 626 | ia64_write_pc (CORE_ADDR new_pc, ptid_t ptid) |
16461d7d KB |
627 | { |
628 | int slot_num = (int) (new_pc & 0xf) / SLOT_MULTIPLIER; | |
39f77062 | 629 | CORE_ADDR psr_value = read_register_pid (IA64_PSR_REGNUM, ptid); |
16461d7d KB |
630 | psr_value &= ~(3LL << 41); |
631 | psr_value |= (CORE_ADDR)(slot_num & 0x3) << 41; | |
632 | ||
633 | new_pc &= ~0xfLL; | |
634 | ||
39f77062 KB |
635 | write_register_pid (IA64_PSR_REGNUM, psr_value, ptid); |
636 | write_register_pid (IA64_IP_REGNUM, new_pc, ptid); | |
16461d7d KB |
637 | } |
638 | ||
639 | #define IS_NaT_COLLECTION_ADDR(addr) ((((addr) >> 3) & 0x3f) == 0x3f) | |
640 | ||
641 | /* Returns the address of the slot that's NSLOTS slots away from | |
642 | the address ADDR. NSLOTS may be positive or negative. */ | |
643 | static CORE_ADDR | |
644 | rse_address_add(CORE_ADDR addr, int nslots) | |
645 | { | |
646 | CORE_ADDR new_addr; | |
647 | int mandatory_nat_slots = nslots / 63; | |
648 | int direction = nslots < 0 ? -1 : 1; | |
649 | ||
650 | new_addr = addr + 8 * (nslots + mandatory_nat_slots); | |
651 | ||
652 | if ((new_addr >> 9) != ((addr + 8 * 64 * mandatory_nat_slots) >> 9)) | |
653 | new_addr += 8 * direction; | |
654 | ||
655 | if (IS_NaT_COLLECTION_ADDR(new_addr)) | |
656 | new_addr += 8 * direction; | |
657 | ||
658 | return new_addr; | |
659 | } | |
660 | ||
661 | /* The IA-64 frame chain is a bit odd. We won't always have a frame | |
662 | pointer, so we use the SP value as the FP for the purpose of | |
663 | creating a frame. There is sometimes a register (not fixed) which | |
664 | is used as a frame pointer. When this register exists, it is not | |
665 | especially hard to determine which one is being used. It isn't | |
666 | even really hard to compute the frame chain, but it can be | |
667 | computationally expensive. So, instead of making life difficult | |
668 | (and slow), we pick a more convenient representation of the frame | |
669 | chain, knowing that we'll have to make some small adjustments | |
670 | in other places. (E.g, note that read_fp() and write_fp() are | |
671 | actually read_sp() and write_sp() below in ia64_gdbarch_init() | |
672 | below.) | |
673 | ||
674 | Okay, so what is the frame chain exactly? It'll be the SP value | |
675 | at the time that the function in question was entered. | |
676 | ||
677 | Note that this *should* actually the frame pointer for the current | |
678 | function! But as I note above, if we were to attempt to find the | |
679 | address of the beginning of the previous frame, we'd waste a lot | |
680 | of cycles for no good reason. So instead, we simply choose to | |
681 | represent the frame chain as the end of the previous frame instead | |
682 | of the beginning. */ | |
683 | ||
684 | CORE_ADDR | |
685 | ia64_frame_chain (struct frame_info *frame) | |
686 | { | |
244bc108 KB |
687 | if (frame->signal_handler_caller) |
688 | return read_sigcontext_register (frame, sp_regnum); | |
689 | else if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame)) | |
690 | return frame->frame; | |
16461d7d | 691 | else |
244bc108 KB |
692 | { |
693 | FRAME_INIT_SAVED_REGS (frame); | |
694 | if (frame->saved_regs[IA64_VFP_REGNUM]) | |
695 | return read_memory_integer (frame->saved_regs[IA64_VFP_REGNUM], 8); | |
696 | else | |
697 | return frame->frame + frame->extra_info->mem_stack_frame_size; | |
698 | } | |
16461d7d KB |
699 | } |
700 | ||
701 | CORE_ADDR | |
702 | ia64_frame_saved_pc (struct frame_info *frame) | |
703 | { | |
244bc108 KB |
704 | if (frame->signal_handler_caller) |
705 | return read_sigcontext_register (frame, pc_regnum); | |
706 | else if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame)) | |
707 | return generic_read_register_dummy (frame->pc, frame->frame, pc_regnum); | |
708 | else | |
709 | { | |
710 | FRAME_INIT_SAVED_REGS (frame); | |
16461d7d | 711 | |
244bc108 KB |
712 | if (frame->saved_regs[IA64_VRAP_REGNUM]) |
713 | return read_memory_integer (frame->saved_regs[IA64_VRAP_REGNUM], 8); | |
714 | else if (frame->next && frame->next->signal_handler_caller) | |
715 | return read_sigcontext_register (frame->next, IA64_BR0_REGNUM); | |
716 | else /* either frameless, or not far enough along in the prologue... */ | |
717 | return ia64_saved_pc_after_call (frame); | |
718 | } | |
16461d7d KB |
719 | } |
720 | ||
58ab00f9 KB |
721 | /* Limit the number of skipped non-prologue instructions since examining |
722 | of the prologue is expensive. */ | |
723 | static int max_skip_non_prologue_insns = 10; | |
724 | ||
725 | /* Given PC representing the starting address of a function, and | |
726 | LIM_PC which is the (sloppy) limit to which to scan when looking | |
727 | for a prologue, attempt to further refine this limit by using | |
728 | the line data in the symbol table. If successful, a better guess | |
729 | on where the prologue ends is returned, otherwise the previous | |
730 | value of lim_pc is returned. TRUST_LIMIT is a pointer to a flag | |
731 | which will be set to indicate whether the returned limit may be | |
732 | used with no further scanning in the event that the function is | |
733 | frameless. */ | |
734 | ||
735 | static CORE_ADDR | |
736 | refine_prologue_limit (CORE_ADDR pc, CORE_ADDR lim_pc, int *trust_limit) | |
737 | { | |
738 | struct symtab_and_line prologue_sal; | |
739 | CORE_ADDR start_pc = pc; | |
740 | ||
741 | /* Start off not trusting the limit. */ | |
742 | *trust_limit = 0; | |
743 | ||
744 | prologue_sal = find_pc_line (pc, 0); | |
745 | if (prologue_sal.line != 0) | |
746 | { | |
747 | int i; | |
748 | CORE_ADDR addr = prologue_sal.end; | |
749 | ||
750 | /* Handle the case in which compiler's optimizer/scheduler | |
751 | has moved instructions into the prologue. We scan ahead | |
752 | in the function looking for address ranges whose corresponding | |
753 | line number is less than or equal to the first one that we | |
754 | found for the function. (It can be less than when the | |
755 | scheduler puts a body instruction before the first prologue | |
756 | instruction.) */ | |
757 | for (i = 2 * max_skip_non_prologue_insns; | |
758 | i > 0 && (lim_pc == 0 || addr < lim_pc); | |
759 | i--) | |
760 | { | |
761 | struct symtab_and_line sal; | |
762 | ||
763 | sal = find_pc_line (addr, 0); | |
764 | if (sal.line == 0) | |
765 | break; | |
766 | if (sal.line <= prologue_sal.line | |
767 | && sal.symtab == prologue_sal.symtab) | |
768 | { | |
769 | prologue_sal = sal; | |
770 | } | |
771 | addr = sal.end; | |
772 | } | |
773 | ||
774 | if (lim_pc == 0 || prologue_sal.end < lim_pc) | |
775 | { | |
776 | lim_pc = prologue_sal.end; | |
777 | if (start_pc == get_pc_function_start (lim_pc)) | |
778 | *trust_limit = 1; | |
779 | } | |
780 | } | |
781 | return lim_pc; | |
782 | } | |
783 | ||
16461d7d KB |
784 | #define isScratch(_regnum_) ((_regnum_) == 2 || (_regnum_) == 3 \ |
785 | || (8 <= (_regnum_) && (_regnum_) <= 11) \ | |
786 | || (14 <= (_regnum_) && (_regnum_) <= 31)) | |
787 | #define imm9(_instr_) \ | |
788 | ( ((((_instr_) & 0x01000000000LL) ? -1 : 0) << 8) \ | |
789 | | (((_instr_) & 0x00008000000LL) >> 20) \ | |
790 | | (((_instr_) & 0x00000001fc0LL) >> 6)) | |
791 | ||
792 | static CORE_ADDR | |
793 | examine_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct frame_info *frame) | |
794 | { | |
795 | CORE_ADDR next_pc; | |
796 | CORE_ADDR last_prologue_pc = pc; | |
16461d7d KB |
797 | instruction_type it; |
798 | long long instr; | |
799 | int do_fsr_stuff = 0; | |
800 | ||
801 | int cfm_reg = 0; | |
802 | int ret_reg = 0; | |
803 | int fp_reg = 0; | |
804 | int unat_save_reg = 0; | |
805 | int pr_save_reg = 0; | |
806 | int mem_stack_frame_size = 0; | |
807 | int spill_reg = 0; | |
808 | CORE_ADDR spill_addr = 0; | |
0927a22b KB |
809 | char instores[8]; |
810 | char infpstores[8]; | |
58ab00f9 | 811 | int trust_limit; |
0927a22b KB |
812 | |
813 | memset (instores, 0, sizeof instores); | |
814 | memset (infpstores, 0, sizeof infpstores); | |
16461d7d KB |
815 | |
816 | if (frame && !frame->saved_regs) | |
817 | { | |
818 | frame_saved_regs_zalloc (frame); | |
819 | do_fsr_stuff = 1; | |
820 | } | |
821 | ||
822 | if (frame | |
823 | && !do_fsr_stuff | |
824 | && frame->extra_info->after_prologue != 0 | |
825 | && frame->extra_info->after_prologue <= lim_pc) | |
826 | return frame->extra_info->after_prologue; | |
827 | ||
58ab00f9 KB |
828 | lim_pc = refine_prologue_limit (pc, lim_pc, &trust_limit); |
829 | ||
16461d7d KB |
830 | /* Must start with an alloc instruction */ |
831 | next_pc = fetch_instruction (pc, &it, &instr); | |
832 | if (pc < lim_pc && next_pc | |
833 | && it == M && ((instr & 0x1ee0000003fLL) == 0x02c00000000LL)) | |
834 | { | |
835 | /* alloc */ | |
836 | int sor = (int) ((instr & 0x00078000000LL) >> 27); | |
837 | int sol = (int) ((instr & 0x00007f00000LL) >> 20); | |
838 | int sof = (int) ((instr & 0x000000fe000LL) >> 13); | |
839 | /* Okay, so sor, sol, and sof aren't used right now; but perhaps | |
840 | we could compare against the size given to us via the cfm as | |
841 | either a sanity check or possibly to see if the frame has been | |
842 | changed by a later alloc instruction... */ | |
843 | int rN = (int) ((instr & 0x00000001fc0LL) >> 6); | |
844 | cfm_reg = rN; | |
845 | last_prologue_pc = next_pc; | |
846 | pc = next_pc; | |
847 | } | |
848 | else | |
58ab00f9 KB |
849 | { |
850 | pc = lim_pc; /* Frameless: We're done early. */ | |
851 | if (trust_limit) | |
852 | last_prologue_pc = lim_pc; | |
853 | } | |
16461d7d KB |
854 | |
855 | /* Loop, looking for prologue instructions, keeping track of | |
856 | where preserved registers were spilled. */ | |
857 | while (pc < lim_pc) | |
858 | { | |
859 | next_pc = fetch_instruction (pc, &it, &instr); | |
860 | if (next_pc == 0) | |
861 | break; | |
862 | ||
902d7086 KB |
863 | if ((it == B && ((instr & 0x1e1f800003f) != 0x04000000000)) |
864 | || ((instr & 0x3fLL) != 0LL)) | |
0927a22b | 865 | { |
902d7086 KB |
866 | /* Exit loop upon hitting a non-nop branch instruction |
867 | or a predicated instruction. */ | |
0927a22b KB |
868 | break; |
869 | } | |
870 | else if (it == I && ((instr & 0x1eff8000000LL) == 0x00188000000LL)) | |
16461d7d KB |
871 | { |
872 | /* Move from BR */ | |
873 | int b2 = (int) ((instr & 0x0000000e000LL) >> 13); | |
874 | int rN = (int) ((instr & 0x00000001fc0LL) >> 6); | |
875 | int qp = (int) (instr & 0x0000000003f); | |
876 | ||
877 | if (qp == 0 && b2 == 0 && rN >= 32 && ret_reg == 0) | |
878 | { | |
879 | ret_reg = rN; | |
880 | last_prologue_pc = next_pc; | |
881 | } | |
882 | } | |
883 | else if ((it == I || it == M) | |
884 | && ((instr & 0x1ee00000000LL) == 0x10800000000LL)) | |
885 | { | |
886 | /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */ | |
887 | int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13) | |
888 | | ((instr & 0x001f8000000LL) >> 20) | |
889 | | ((instr & 0x000000fe000LL) >> 13)); | |
890 | int rM = (int) ((instr & 0x00007f00000LL) >> 20); | |
891 | int rN = (int) ((instr & 0x00000001fc0LL) >> 6); | |
892 | int qp = (int) (instr & 0x0000000003fLL); | |
893 | ||
894 | if (qp == 0 && rN >= 32 && imm == 0 && rM == 12 && fp_reg == 0) | |
895 | { | |
896 | /* mov rN, r12 */ | |
897 | fp_reg = rN; | |
898 | last_prologue_pc = next_pc; | |
899 | } | |
900 | else if (qp == 0 && rN == 12 && rM == 12) | |
901 | { | |
902 | /* adds r12, -mem_stack_frame_size, r12 */ | |
903 | mem_stack_frame_size -= imm; | |
904 | last_prologue_pc = next_pc; | |
905 | } | |
906 | else if (qp == 0 && rN == 2 | |
907 | && ((rM == fp_reg && fp_reg != 0) || rM == 12)) | |
908 | { | |
909 | /* adds r2, spilloffset, rFramePointer | |
910 | or | |
911 | adds r2, spilloffset, r12 | |
912 | ||
913 | Get ready for stf.spill or st8.spill instructions. | |
914 | The address to start spilling at is loaded into r2. | |
915 | FIXME: Why r2? That's what gcc currently uses; it | |
916 | could well be different for other compilers. */ | |
917 | ||
918 | /* Hmm... whether or not this will work will depend on | |
919 | where the pc is. If it's still early in the prologue | |
920 | this'll be wrong. FIXME */ | |
921 | spill_addr = (frame ? frame->frame : 0) | |
922 | + (rM == 12 ? 0 : mem_stack_frame_size) | |
923 | + imm; | |
924 | spill_reg = rN; | |
925 | last_prologue_pc = next_pc; | |
926 | } | |
927 | } | |
928 | else if (it == M | |
929 | && ( ((instr & 0x1efc0000000LL) == 0x0eec0000000LL) | |
930 | || ((instr & 0x1ffc8000000LL) == 0x0cec0000000LL) )) | |
931 | { | |
932 | /* stf.spill [rN] = fM, imm9 | |
933 | or | |
934 | stf.spill [rN] = fM */ | |
935 | ||
936 | int imm = imm9(instr); | |
937 | int rN = (int) ((instr & 0x00007f00000LL) >> 20); | |
938 | int fM = (int) ((instr & 0x000000fe000LL) >> 13); | |
939 | int qp = (int) (instr & 0x0000000003fLL); | |
940 | if (qp == 0 && rN == spill_reg && spill_addr != 0 | |
941 | && ((2 <= fM && fM <= 5) || (16 <= fM && fM <= 31))) | |
942 | { | |
943 | if (do_fsr_stuff) | |
944 | frame->saved_regs[IA64_FR0_REGNUM + fM] = spill_addr; | |
945 | ||
946 | if ((instr & 0x1efc0000000) == 0x0eec0000000) | |
947 | spill_addr += imm; | |
948 | else | |
949 | spill_addr = 0; /* last one; must be done */ | |
950 | last_prologue_pc = next_pc; | |
951 | } | |
952 | } | |
953 | else if ((it == M && ((instr & 0x1eff8000000LL) == 0x02110000000LL)) | |
954 | || (it == I && ((instr & 0x1eff8000000LL) == 0x00050000000LL)) ) | |
955 | { | |
956 | /* mov.m rN = arM | |
957 | or | |
958 | mov.i rN = arM */ | |
959 | ||
960 | int arM = (int) ((instr & 0x00007f00000LL) >> 20); | |
961 | int rN = (int) ((instr & 0x00000001fc0LL) >> 6); | |
962 | int qp = (int) (instr & 0x0000000003fLL); | |
963 | if (qp == 0 && isScratch (rN) && arM == 36 /* ar.unat */) | |
964 | { | |
965 | /* We have something like "mov.m r3 = ar.unat". Remember the | |
966 | r3 (or whatever) and watch for a store of this register... */ | |
967 | unat_save_reg = rN; | |
968 | last_prologue_pc = next_pc; | |
969 | } | |
970 | } | |
971 | else if (it == I && ((instr & 0x1eff8000000LL) == 0x00198000000LL)) | |
972 | { | |
973 | /* mov rN = pr */ | |
974 | int rN = (int) ((instr & 0x00000001fc0LL) >> 6); | |
975 | int qp = (int) (instr & 0x0000000003fLL); | |
976 | if (qp == 0 && isScratch (rN)) | |
977 | { | |
978 | pr_save_reg = rN; | |
979 | last_prologue_pc = next_pc; | |
980 | } | |
981 | } | |
982 | else if (it == M | |
983 | && ( ((instr & 0x1ffc8000000LL) == 0x08cc0000000LL) | |
984 | || ((instr & 0x1efc0000000LL) == 0x0acc0000000LL))) | |
985 | { | |
986 | /* st8 [rN] = rM | |
987 | or | |
988 | st8 [rN] = rM, imm9 */ | |
989 | int rN = (int) ((instr & 0x00007f00000LL) >> 20); | |
990 | int rM = (int) ((instr & 0x000000fe000LL) >> 13); | |
991 | int qp = (int) (instr & 0x0000000003fLL); | |
992 | if (qp == 0 && rN == spill_reg && spill_addr != 0 | |
993 | && (rM == unat_save_reg || rM == pr_save_reg)) | |
994 | { | |
995 | /* We've found a spill of either the UNAT register or the PR | |
996 | register. (Well, not exactly; what we've actually found is | |
997 | a spill of the register that UNAT or PR was moved to). | |
998 | Record that fact and move on... */ | |
999 | if (rM == unat_save_reg) | |
1000 | { | |
1001 | /* Track UNAT register */ | |
1002 | if (do_fsr_stuff) | |
1003 | frame->saved_regs[IA64_UNAT_REGNUM] = spill_addr; | |
1004 | unat_save_reg = 0; | |
1005 | } | |
1006 | else | |
1007 | { | |
1008 | /* Track PR register */ | |
1009 | if (do_fsr_stuff) | |
1010 | frame->saved_regs[IA64_PR_REGNUM] = spill_addr; | |
1011 | pr_save_reg = 0; | |
1012 | } | |
1013 | if ((instr & 0x1efc0000000LL) == 0x0acc0000000LL) | |
1014 | /* st8 [rN] = rM, imm9 */ | |
1015 | spill_addr += imm9(instr); | |
1016 | else | |
1017 | spill_addr = 0; /* must be done spilling */ | |
1018 | last_prologue_pc = next_pc; | |
1019 | } | |
0927a22b KB |
1020 | else if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32]) |
1021 | { | |
1022 | /* Allow up to one store of each input register. */ | |
1023 | instores[rM-32] = 1; | |
1024 | last_prologue_pc = next_pc; | |
1025 | } | |
1026 | } | |
1027 | else if (it == M && ((instr & 0x1ff08000000LL) == 0x08c00000000LL)) | |
1028 | { | |
1029 | /* One of | |
1030 | st1 [rN] = rM | |
1031 | st2 [rN] = rM | |
1032 | st4 [rN] = rM | |
1033 | st8 [rN] = rM | |
1034 | Note that the st8 case is handled in the clause above. | |
1035 | ||
1036 | Advance over stores of input registers. One store per input | |
1037 | register is permitted. */ | |
1038 | int rM = (int) ((instr & 0x000000fe000LL) >> 13); | |
1039 | int qp = (int) (instr & 0x0000000003fLL); | |
1040 | if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32]) | |
1041 | { | |
1042 | instores[rM-32] = 1; | |
1043 | last_prologue_pc = next_pc; | |
1044 | } | |
1045 | } | |
1046 | else if (it == M && ((instr & 0x1ff88000000LL) == 0x0cc80000000LL)) | |
1047 | { | |
1048 | /* Either | |
1049 | stfs [rN] = fM | |
1050 | or | |
1051 | stfd [rN] = fM | |
1052 | ||
1053 | Advance over stores of floating point input registers. Again | |
1054 | one store per register is permitted */ | |
1055 | int fM = (int) ((instr & 0x000000fe000LL) >> 13); | |
1056 | int qp = (int) (instr & 0x0000000003fLL); | |
1057 | if (qp == 0 && 8 <= fM && fM < 16 && !infpstores[fM - 8]) | |
1058 | { | |
1059 | infpstores[fM-8] = 1; | |
1060 | last_prologue_pc = next_pc; | |
1061 | } | |
16461d7d KB |
1062 | } |
1063 | else if (it == M | |
1064 | && ( ((instr & 0x1ffc8000000LL) == 0x08ec0000000LL) | |
1065 | || ((instr & 0x1efc0000000LL) == 0x0aec0000000LL))) | |
1066 | { | |
1067 | /* st8.spill [rN] = rM | |
1068 | or | |
1069 | st8.spill [rN] = rM, imm9 */ | |
1070 | int rN = (int) ((instr & 0x00007f00000LL) >> 20); | |
1071 | int rM = (int) ((instr & 0x000000fe000LL) >> 13); | |
1072 | int qp = (int) (instr & 0x0000000003fLL); | |
1073 | if (qp == 0 && rN == spill_reg && 4 <= rM && rM <= 7) | |
1074 | { | |
1075 | /* We've found a spill of one of the preserved general purpose | |
1076 | regs. Record the spill address and advance the spill | |
1077 | register if appropriate. */ | |
1078 | if (do_fsr_stuff) | |
1079 | frame->saved_regs[IA64_GR0_REGNUM + rM] = spill_addr; | |
1080 | if ((instr & 0x1efc0000000LL) == 0x0aec0000000LL) | |
1081 | /* st8.spill [rN] = rM, imm9 */ | |
1082 | spill_addr += imm9(instr); | |
1083 | else | |
1084 | spill_addr = 0; /* Done spilling */ | |
1085 | last_prologue_pc = next_pc; | |
1086 | } | |
1087 | } | |
16461d7d KB |
1088 | |
1089 | pc = next_pc; | |
1090 | } | |
1091 | ||
1092 | if (do_fsr_stuff) { | |
1093 | int i; | |
1094 | CORE_ADDR addr; | |
3a854e23 KB |
1095 | int sor, rrb_gr; |
1096 | ||
1097 | /* Extract the size of the rotating portion of the stack | |
1098 | frame and the register rename base from the current | |
1099 | frame marker. */ | |
1100 | sor = ((frame->extra_info->cfm >> 14) & 0xf) * 8; | |
1101 | rrb_gr = (frame->extra_info->cfm >> 18) & 0x7f; | |
16461d7d KB |
1102 | |
1103 | for (i = 0, addr = frame->extra_info->bsp; | |
1104 | i < frame->extra_info->sof; | |
1105 | i++, addr += 8) | |
1106 | { | |
1107 | if (IS_NaT_COLLECTION_ADDR (addr)) | |
1108 | { | |
1109 | addr += 8; | |
1110 | } | |
3a854e23 KB |
1111 | if (i < sor) |
1112 | frame->saved_regs[IA64_GR32_REGNUM + ((i + (sor - rrb_gr)) % sor)] | |
1113 | = addr; | |
1114 | else | |
1115 | frame->saved_regs[IA64_GR32_REGNUM + i] = addr; | |
16461d7d KB |
1116 | |
1117 | if (i+32 == cfm_reg) | |
1118 | frame->saved_regs[IA64_CFM_REGNUM] = addr; | |
1119 | if (i+32 == ret_reg) | |
1120 | frame->saved_regs[IA64_VRAP_REGNUM] = addr; | |
1121 | if (i+32 == fp_reg) | |
1122 | frame->saved_regs[IA64_VFP_REGNUM] = addr; | |
1123 | } | |
1124 | } | |
1125 | ||
1126 | if (frame && frame->extra_info) { | |
1127 | frame->extra_info->after_prologue = last_prologue_pc; | |
1128 | frame->extra_info->mem_stack_frame_size = mem_stack_frame_size; | |
1129 | frame->extra_info->fp_reg = fp_reg; | |
1130 | } | |
1131 | ||
1132 | return last_prologue_pc; | |
1133 | } | |
1134 | ||
1135 | CORE_ADDR | |
1136 | ia64_skip_prologue (CORE_ADDR pc) | |
1137 | { | |
1138 | return examine_prologue (pc, pc+1024, 0); | |
1139 | } | |
1140 | ||
1141 | void | |
1142 | ia64_frame_init_saved_regs (struct frame_info *frame) | |
1143 | { | |
16461d7d KB |
1144 | if (frame->saved_regs) |
1145 | return; | |
1146 | ||
244bc108 KB |
1147 | if (frame->signal_handler_caller && SIGCONTEXT_REGISTER_ADDRESS) |
1148 | { | |
1149 | int regno; | |
16461d7d | 1150 | |
244bc108 | 1151 | frame_saved_regs_zalloc (frame); |
16461d7d | 1152 | |
244bc108 KB |
1153 | frame->saved_regs[IA64_VRAP_REGNUM] = |
1154 | SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_IP_REGNUM); | |
1155 | frame->saved_regs[IA64_CFM_REGNUM] = | |
1156 | SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_CFM_REGNUM); | |
1157 | frame->saved_regs[IA64_PSR_REGNUM] = | |
1158 | SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_PSR_REGNUM); | |
1159 | #if 0 | |
1160 | frame->saved_regs[IA64_BSP_REGNUM] = | |
1161 | SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_BSP_REGNUM); | |
1162 | #endif | |
1163 | frame->saved_regs[IA64_RNAT_REGNUM] = | |
1164 | SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_RNAT_REGNUM); | |
1165 | frame->saved_regs[IA64_CCV_REGNUM] = | |
1166 | SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_CCV_REGNUM); | |
1167 | frame->saved_regs[IA64_UNAT_REGNUM] = | |
1168 | SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_UNAT_REGNUM); | |
1169 | frame->saved_regs[IA64_FPSR_REGNUM] = | |
1170 | SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_FPSR_REGNUM); | |
1171 | frame->saved_regs[IA64_PFS_REGNUM] = | |
1172 | SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_PFS_REGNUM); | |
1173 | frame->saved_regs[IA64_LC_REGNUM] = | |
1174 | SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_LC_REGNUM); | |
1175 | for (regno = IA64_GR1_REGNUM; regno <= IA64_GR31_REGNUM; regno++) | |
1176 | if (regno != sp_regnum) | |
1177 | frame->saved_regs[regno] = | |
1178 | SIGCONTEXT_REGISTER_ADDRESS (frame->frame, regno); | |
1179 | for (regno = IA64_BR0_REGNUM; regno <= IA64_BR7_REGNUM; regno++) | |
1180 | frame->saved_regs[regno] = | |
1181 | SIGCONTEXT_REGISTER_ADDRESS (frame->frame, regno); | |
1182 | for (regno = IA64_FR2_REGNUM; regno <= IA64_BR7_REGNUM; regno++) | |
1183 | frame->saved_regs[regno] = | |
1184 | SIGCONTEXT_REGISTER_ADDRESS (frame->frame, regno); | |
16461d7d KB |
1185 | } |
1186 | else | |
1187 | { | |
244bc108 | 1188 | CORE_ADDR func_start; |
16461d7d | 1189 | |
244bc108 KB |
1190 | func_start = get_pc_function_start (frame->pc); |
1191 | examine_prologue (func_start, frame->pc, frame); | |
1192 | } | |
16461d7d KB |
1193 | } |
1194 | ||
1195 | void | |
1196 | ia64_get_saved_register (char *raw_buffer, | |
1197 | int *optimized, | |
1198 | CORE_ADDR *addrp, | |
1199 | struct frame_info *frame, | |
1200 | int regnum, | |
1201 | enum lval_type *lval) | |
1202 | { | |
244bc108 | 1203 | int is_dummy_frame; |
16461d7d KB |
1204 | |
1205 | if (!target_has_registers) | |
1206 | error ("No registers."); | |
1207 | ||
1208 | if (optimized != NULL) | |
1209 | *optimized = 0; | |
244bc108 KB |
1210 | |
1211 | if (addrp != NULL) | |
1212 | *addrp = 0; | |
1213 | ||
1214 | if (lval != NULL) | |
1215 | *lval = not_lval; | |
1216 | ||
1217 | is_dummy_frame = PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame); | |
1218 | ||
1219 | if (regnum == SP_REGNUM && frame->next) | |
16461d7d KB |
1220 | { |
1221 | /* Handle SP values for all frames but the topmost. */ | |
16461d7d KB |
1222 | store_address (raw_buffer, REGISTER_RAW_SIZE (regnum), frame->frame); |
1223 | } | |
1224 | else if (regnum == IA64_BSP_REGNUM) | |
1225 | { | |
16461d7d KB |
1226 | store_address (raw_buffer, REGISTER_RAW_SIZE (regnum), |
1227 | frame->extra_info->bsp); | |
1228 | } | |
1229 | else if (regnum == IA64_VFP_REGNUM) | |
1230 | { | |
1231 | /* If the function in question uses an automatic register (r32-r127) | |
1232 | for the frame pointer, it'll be found by ia64_find_saved_register() | |
1233 | above. If the function lacks one of these frame pointers, we can | |
1234 | still provide a value since we know the size of the frame */ | |
1235 | CORE_ADDR vfp = frame->frame + frame->extra_info->mem_stack_frame_size; | |
16461d7d KB |
1236 | store_address (raw_buffer, REGISTER_RAW_SIZE (IA64_VFP_REGNUM), vfp); |
1237 | } | |
1238 | else if (IA64_PR0_REGNUM <= regnum && regnum <= IA64_PR63_REGNUM) | |
1239 | { | |
2fc3ac7e | 1240 | char *pr_raw_buffer = alloca (MAX_REGISTER_RAW_SIZE); |
16461d7d KB |
1241 | int pr_optim; |
1242 | enum lval_type pr_lval; | |
1243 | CORE_ADDR pr_addr; | |
1244 | int prN_val; | |
1245 | ia64_get_saved_register (pr_raw_buffer, &pr_optim, &pr_addr, | |
1246 | frame, IA64_PR_REGNUM, &pr_lval); | |
3a854e23 KB |
1247 | if (IA64_PR16_REGNUM <= regnum && regnum <= IA64_PR63_REGNUM) |
1248 | { | |
1249 | /* Fetch predicate register rename base from current frame | |
1250 | marker for this frame. */ | |
1251 | int rrb_pr = (frame->extra_info->cfm >> 32) & 0x3f; | |
1252 | ||
1253 | /* Adjust the register number to account for register rotation. */ | |
1254 | regnum = IA64_PR16_REGNUM | |
1255 | + ((regnum - IA64_PR16_REGNUM) + rrb_pr) % 48; | |
1256 | } | |
16461d7d KB |
1257 | prN_val = extract_bit_field ((unsigned char *) pr_raw_buffer, |
1258 | regnum - IA64_PR0_REGNUM, 1); | |
1259 | store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum), prN_val); | |
16461d7d KB |
1260 | } |
1261 | else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM) | |
1262 | { | |
2fc3ac7e | 1263 | char *unat_raw_buffer = alloca (MAX_REGISTER_RAW_SIZE); |
16461d7d KB |
1264 | int unat_optim; |
1265 | enum lval_type unat_lval; | |
1266 | CORE_ADDR unat_addr; | |
1267 | int unatN_val; | |
1268 | ia64_get_saved_register (unat_raw_buffer, &unat_optim, &unat_addr, | |
1269 | frame, IA64_UNAT_REGNUM, &unat_lval); | |
1270 | unatN_val = extract_bit_field ((unsigned char *) unat_raw_buffer, | |
1271 | regnum - IA64_NAT0_REGNUM, 1); | |
1272 | store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum), | |
1273 | unatN_val); | |
16461d7d KB |
1274 | } |
1275 | else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM) | |
1276 | { | |
1277 | int natval = 0; | |
1278 | /* Find address of general register corresponding to nat bit we're | |
1279 | interested in. */ | |
244bc108 KB |
1280 | CORE_ADDR gr_addr = 0; |
1281 | ||
1282 | if (!is_dummy_frame) | |
1283 | { | |
1284 | FRAME_INIT_SAVED_REGS (frame); | |
1285 | gr_addr = frame->saved_regs[ regnum - IA64_NAT0_REGNUM | |
1286 | + IA64_GR0_REGNUM]; | |
1287 | } | |
16461d7d KB |
1288 | if (gr_addr) |
1289 | { | |
1290 | /* Compute address of nat collection bits */ | |
1291 | CORE_ADDR nat_addr = gr_addr | 0x1f8; | |
1292 | CORE_ADDR bsp = read_register (IA64_BSP_REGNUM); | |
1293 | CORE_ADDR nat_collection; | |
1294 | int nat_bit; | |
1295 | /* If our nat collection address is bigger than bsp, we have to get | |
1296 | the nat collection from rnat. Otherwise, we fetch the nat | |
1297 | collection from the computed address. */ | |
1298 | if (nat_addr >= bsp) | |
1299 | nat_collection = read_register (IA64_RNAT_REGNUM); | |
1300 | else | |
1301 | nat_collection = read_memory_integer (nat_addr, 8); | |
1302 | nat_bit = (gr_addr >> 3) & 0x3f; | |
1303 | natval = (nat_collection >> nat_bit) & 1; | |
1304 | } | |
1305 | store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum), natval); | |
244bc108 KB |
1306 | } |
1307 | else if (regnum == IA64_IP_REGNUM) | |
1308 | { | |
1309 | CORE_ADDR pc; | |
1310 | if (frame->next) | |
1311 | { | |
1312 | /* FIXME: Set *addrp, *lval when possible. */ | |
1313 | pc = ia64_frame_saved_pc (frame->next); | |
1314 | } | |
1315 | else | |
1316 | { | |
1317 | pc = read_pc (); | |
1318 | } | |
1319 | store_address (raw_buffer, REGISTER_RAW_SIZE (IA64_IP_REGNUM), pc); | |
1320 | } | |
1321 | else if (IA64_GR32_REGNUM <= regnum && regnum <= IA64_GR127_REGNUM) | |
1322 | { | |
1323 | CORE_ADDR addr = 0; | |
1324 | if (!is_dummy_frame) | |
1325 | { | |
1326 | FRAME_INIT_SAVED_REGS (frame); | |
1327 | addr = frame->saved_regs[regnum]; | |
1328 | } | |
1329 | ||
1330 | if (addr != 0) | |
1331 | { | |
1332 | if (lval != NULL) | |
1333 | *lval = lval_memory; | |
1334 | if (addrp != NULL) | |
1335 | *addrp = addr; | |
1336 | read_memory (addr, raw_buffer, REGISTER_RAW_SIZE (regnum)); | |
1337 | } | |
1338 | else | |
1339 | { | |
1340 | /* r32 - r127 must be fetchable via memory. If they aren't, | |
1341 | then the register is unavailable */ | |
1342 | memset (raw_buffer, 0, REGISTER_RAW_SIZE (regnum)); | |
1343 | } | |
16461d7d KB |
1344 | } |
1345 | else | |
1346 | { | |
3a854e23 KB |
1347 | if (IA64_FR32_REGNUM <= regnum && regnum <= IA64_FR127_REGNUM) |
1348 | { | |
1349 | /* Fetch floating point register rename base from current | |
1350 | frame marker for this frame. */ | |
1351 | int rrb_fr = (frame->extra_info->cfm >> 25) & 0x7f; | |
1352 | ||
1353 | /* Adjust the floating point register number to account for | |
1354 | register rotation. */ | |
1355 | regnum = IA64_FR32_REGNUM | |
1356 | + ((regnum - IA64_FR32_REGNUM) + rrb_fr) % 96; | |
1357 | } | |
1358 | ||
244bc108 KB |
1359 | generic_get_saved_register (raw_buffer, optimized, addrp, frame, |
1360 | regnum, lval); | |
16461d7d | 1361 | } |
16461d7d KB |
1362 | } |
1363 | ||
1364 | /* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of | |
1365 | EXTRACT_RETURN_VALUE? GCC_P is true if compiled with gcc | |
1366 | and TYPE is the type (which is known to be struct, union or array). */ | |
1367 | int | |
1368 | ia64_use_struct_convention (int gcc_p, struct type *type) | |
1369 | { | |
64a5b29c KB |
1370 | struct type *float_elt_type; |
1371 | ||
1372 | /* HFAs are structures (or arrays) consisting entirely of floating | |
1373 | point values of the same length. Up to 8 of these are returned | |
1374 | in registers. Don't use the struct convention when this is the | |
1375 | case. */ | |
1376 | float_elt_type = is_float_or_hfa_type (type); | |
1377 | if (float_elt_type != NULL | |
1378 | && TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type) <= 8) | |
1379 | return 0; | |
1380 | ||
1381 | /* Other structs of length 32 or less are returned in r8-r11. | |
1382 | Don't use the struct convention for those either. */ | |
16461d7d KB |
1383 | return TYPE_LENGTH (type) > 32; |
1384 | } | |
1385 | ||
1386 | void | |
1387 | ia64_extract_return_value (struct type *type, char *regbuf, char *valbuf) | |
1388 | { | |
64a5b29c KB |
1389 | struct type *float_elt_type; |
1390 | ||
1391 | float_elt_type = is_float_or_hfa_type (type); | |
1392 | if (float_elt_type != NULL) | |
1393 | { | |
1394 | int offset = 0; | |
1395 | int regnum = IA64_FR8_REGNUM; | |
1396 | int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type); | |
1397 | ||
1398 | while (n-- > 0) | |
1399 | { | |
1400 | ia64_register_convert_to_virtual (regnum, float_elt_type, | |
1401 | ®buf[REGISTER_BYTE (regnum)], valbuf + offset); | |
1402 | offset += TYPE_LENGTH (float_elt_type); | |
1403 | regnum++; | |
1404 | } | |
1405 | } | |
16461d7d | 1406 | else |
64a5b29c KB |
1407 | memcpy (valbuf, ®buf[REGISTER_BYTE (IA64_GR8_REGNUM)], |
1408 | TYPE_LENGTH (type)); | |
16461d7d KB |
1409 | } |
1410 | ||
1411 | /* FIXME: Turn this into a stack of some sort. Unfortunately, something | |
1412 | like this is necessary though since the IA-64 calling conventions specify | |
1413 | that r8 is not preserved. */ | |
1414 | static CORE_ADDR struct_return_address; | |
1415 | ||
1416 | CORE_ADDR | |
1417 | ia64_extract_struct_value_address (char *regbuf) | |
1418 | { | |
1419 | /* FIXME: See above. */ | |
1420 | return struct_return_address; | |
1421 | } | |
1422 | ||
1423 | void | |
1424 | ia64_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) | |
1425 | { | |
1426 | /* FIXME: See above. */ | |
1427 | /* Note that most of the work was done in ia64_push_arguments() */ | |
1428 | struct_return_address = addr; | |
1429 | } | |
1430 | ||
1431 | int | |
1432 | ia64_frameless_function_invocation (struct frame_info *frame) | |
1433 | { | |
fbad0893 KB |
1434 | FRAME_INIT_SAVED_REGS (frame); |
1435 | return (frame->extra_info->mem_stack_frame_size == 0); | |
16461d7d KB |
1436 | } |
1437 | ||
1438 | CORE_ADDR | |
1439 | ia64_saved_pc_after_call (struct frame_info *frame) | |
1440 | { | |
1441 | return read_register (IA64_BR0_REGNUM); | |
1442 | } | |
1443 | ||
1444 | CORE_ADDR | |
1445 | ia64_frame_args_address (struct frame_info *frame) | |
1446 | { | |
1447 | /* frame->frame points at the SP for this frame; But we want the start | |
1448 | of the frame, not the end. Calling frame chain will get his for us. */ | |
1449 | return ia64_frame_chain (frame); | |
1450 | } | |
1451 | ||
1452 | CORE_ADDR | |
1453 | ia64_frame_locals_address (struct frame_info *frame) | |
1454 | { | |
1455 | /* frame->frame points at the SP for this frame; But we want the start | |
1456 | of the frame, not the end. Calling frame chain will get his for us. */ | |
1457 | return ia64_frame_chain (frame); | |
1458 | } | |
1459 | ||
1460 | void | |
1461 | ia64_init_extra_frame_info (int fromleaf, struct frame_info *frame) | |
1462 | { | |
1463 | CORE_ADDR bsp, cfm; | |
244bc108 KB |
1464 | int next_frame_is_call_dummy = ((frame->next != NULL) |
1465 | && PC_IN_CALL_DUMMY (frame->next->pc, frame->next->frame, | |
1466 | frame->next->frame)); | |
16461d7d KB |
1467 | |
1468 | frame->extra_info = (struct frame_extra_info *) | |
1469 | frame_obstack_alloc (sizeof (struct frame_extra_info)); | |
1470 | ||
1471 | if (frame->next == 0) | |
1472 | { | |
1473 | bsp = read_register (IA64_BSP_REGNUM); | |
1474 | cfm = read_register (IA64_CFM_REGNUM); | |
1475 | ||
1476 | } | |
244bc108 KB |
1477 | else if (frame->next->signal_handler_caller) |
1478 | { | |
1479 | bsp = read_sigcontext_register (frame->next, IA64_BSP_REGNUM); | |
1480 | cfm = read_sigcontext_register (frame->next, IA64_CFM_REGNUM); | |
1481 | } | |
1482 | else if (next_frame_is_call_dummy) | |
1483 | { | |
1484 | bsp = generic_read_register_dummy (frame->next->pc, frame->next->frame, | |
1485 | IA64_BSP_REGNUM); | |
1486 | cfm = generic_read_register_dummy (frame->next->pc, frame->next->frame, | |
1487 | IA64_CFM_REGNUM); | |
1488 | } | |
16461d7d KB |
1489 | else |
1490 | { | |
1491 | struct frame_info *frn = frame->next; | |
16461d7d KB |
1492 | |
1493 | FRAME_INIT_SAVED_REGS (frn); | |
1494 | ||
1495 | if (frn->saved_regs[IA64_CFM_REGNUM] != 0) | |
1496 | cfm = read_memory_integer (frn->saved_regs[IA64_CFM_REGNUM], 8); | |
244bc108 KB |
1497 | else if (frn->next && frn->next->signal_handler_caller) |
1498 | cfm = read_sigcontext_register (frn->next, IA64_PFS_REGNUM); | |
1499 | else if (frn->next | |
1500 | && PC_IN_CALL_DUMMY (frn->next->pc, frn->next->frame, | |
1501 | frn->next->frame)) | |
1502 | cfm = generic_read_register_dummy (frn->next->pc, frn->next->frame, | |
1503 | IA64_PFS_REGNUM); | |
16461d7d | 1504 | else |
76d689a6 | 1505 | cfm = read_register (IA64_PFS_REGNUM); |
16461d7d KB |
1506 | |
1507 | bsp = frn->extra_info->bsp; | |
1508 | } | |
1509 | frame->extra_info->cfm = cfm; | |
1510 | frame->extra_info->sof = cfm & 0x7f; | |
1511 | frame->extra_info->sol = (cfm >> 7) & 0x7f; | |
244bc108 KB |
1512 | if (frame->next == 0 |
1513 | || frame->next->signal_handler_caller | |
1514 | || next_frame_is_call_dummy) | |
16461d7d KB |
1515 | frame->extra_info->bsp = rse_address_add (bsp, -frame->extra_info->sof); |
1516 | else | |
1517 | frame->extra_info->bsp = rse_address_add (bsp, -frame->extra_info->sol); | |
1518 | ||
1519 | frame->extra_info->after_prologue = 0; | |
1520 | frame->extra_info->mem_stack_frame_size = -1; /* Not yet determined */ | |
1521 | frame->extra_info->fp_reg = 0; | |
1522 | } | |
1523 | ||
64a5b29c KB |
1524 | static int |
1525 | is_float_or_hfa_type_recurse (struct type *t, struct type **etp) | |
1526 | { | |
1527 | switch (TYPE_CODE (t)) | |
1528 | { | |
1529 | case TYPE_CODE_FLT: | |
1530 | if (*etp) | |
1531 | return TYPE_LENGTH (*etp) == TYPE_LENGTH (t); | |
1532 | else | |
1533 | { | |
1534 | *etp = t; | |
1535 | return 1; | |
1536 | } | |
1537 | break; | |
1538 | case TYPE_CODE_ARRAY: | |
98f96ba1 KB |
1539 | return |
1540 | is_float_or_hfa_type_recurse (check_typedef (TYPE_TARGET_TYPE (t)), | |
1541 | etp); | |
64a5b29c KB |
1542 | break; |
1543 | case TYPE_CODE_STRUCT: | |
1544 | { | |
1545 | int i; | |
1546 | ||
1547 | for (i = 0; i < TYPE_NFIELDS (t); i++) | |
98f96ba1 KB |
1548 | if (!is_float_or_hfa_type_recurse |
1549 | (check_typedef (TYPE_FIELD_TYPE (t, i)), etp)) | |
64a5b29c KB |
1550 | return 0; |
1551 | return 1; | |
1552 | } | |
1553 | break; | |
1554 | default: | |
1555 | return 0; | |
1556 | break; | |
1557 | } | |
1558 | } | |
1559 | ||
1560 | /* Determine if the given type is one of the floating point types or | |
1561 | and HFA (which is a struct, array, or combination thereof whose | |
1562 | bottom-most elements are all of the same floating point type.) */ | |
1563 | ||
1564 | static struct type * | |
1565 | is_float_or_hfa_type (struct type *t) | |
1566 | { | |
1567 | struct type *et = 0; | |
1568 | ||
1569 | return is_float_or_hfa_type_recurse (t, &et) ? et : 0; | |
1570 | } | |
1571 | ||
1572 | ||
98f96ba1 KB |
1573 | /* Return 1 if the alignment of T is such that the next even slot |
1574 | should be used. Return 0, if the next available slot should | |
1575 | be used. (See section 8.5.1 of the IA-64 Software Conventions | |
1576 | and Runtime manual.) */ | |
1577 | ||
1578 | static int | |
1579 | slot_alignment_is_next_even (struct type *t) | |
1580 | { | |
1581 | switch (TYPE_CODE (t)) | |
1582 | { | |
1583 | case TYPE_CODE_INT: | |
1584 | case TYPE_CODE_FLT: | |
1585 | if (TYPE_LENGTH (t) > 8) | |
1586 | return 1; | |
1587 | else | |
1588 | return 0; | |
1589 | case TYPE_CODE_ARRAY: | |
1590 | return | |
1591 | slot_alignment_is_next_even (check_typedef (TYPE_TARGET_TYPE (t))); | |
1592 | case TYPE_CODE_STRUCT: | |
1593 | { | |
1594 | int i; | |
1595 | ||
1596 | for (i = 0; i < TYPE_NFIELDS (t); i++) | |
1597 | if (slot_alignment_is_next_even | |
1598 | (check_typedef (TYPE_FIELD_TYPE (t, i)))) | |
1599 | return 1; | |
1600 | return 0; | |
1601 | } | |
1602 | default: | |
1603 | return 0; | |
1604 | } | |
1605 | } | |
1606 | ||
64a5b29c KB |
1607 | /* Attempt to find (and return) the global pointer for the given |
1608 | function. | |
1609 | ||
1610 | This is a rather nasty bit of code searchs for the .dynamic section | |
1611 | in the objfile corresponding to the pc of the function we're trying | |
1612 | to call. Once it finds the addresses at which the .dynamic section | |
1613 | lives in the child process, it scans the Elf64_Dyn entries for a | |
1614 | DT_PLTGOT tag. If it finds one of these, the corresponding | |
1615 | d_un.d_ptr value is the global pointer. */ | |
1616 | ||
1617 | static CORE_ADDR | |
698cb3f0 | 1618 | generic_elf_find_global_pointer (CORE_ADDR faddr) |
64a5b29c | 1619 | { |
76d689a6 | 1620 | struct obj_section *faddr_sect; |
64a5b29c | 1621 | |
76d689a6 KB |
1622 | faddr_sect = find_pc_section (faddr); |
1623 | if (faddr_sect != NULL) | |
64a5b29c KB |
1624 | { |
1625 | struct obj_section *osect; | |
1626 | ||
76d689a6 | 1627 | ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect) |
64a5b29c KB |
1628 | { |
1629 | if (strcmp (osect->the_bfd_section->name, ".dynamic") == 0) | |
1630 | break; | |
1631 | } | |
1632 | ||
76d689a6 | 1633 | if (osect < faddr_sect->objfile->sections_end) |
64a5b29c KB |
1634 | { |
1635 | CORE_ADDR addr; | |
1636 | ||
1637 | addr = osect->addr; | |
1638 | while (addr < osect->endaddr) | |
1639 | { | |
1640 | int status; | |
1641 | LONGEST tag; | |
1642 | char buf[8]; | |
1643 | ||
1644 | status = target_read_memory (addr, buf, sizeof (buf)); | |
1645 | if (status != 0) | |
1646 | break; | |
1647 | tag = extract_signed_integer (buf, sizeof (buf)); | |
1648 | ||
1649 | if (tag == DT_PLTGOT) | |
1650 | { | |
1651 | CORE_ADDR global_pointer; | |
1652 | ||
1653 | status = target_read_memory (addr + 8, buf, sizeof (buf)); | |
1654 | if (status != 0) | |
1655 | break; | |
1656 | global_pointer = extract_address (buf, sizeof (buf)); | |
1657 | ||
1658 | /* The payoff... */ | |
1659 | return global_pointer; | |
1660 | } | |
1661 | ||
1662 | if (tag == DT_NULL) | |
1663 | break; | |
1664 | ||
1665 | addr += 16; | |
1666 | } | |
1667 | } | |
1668 | } | |
1669 | return 0; | |
1670 | } | |
1671 | ||
1672 | /* Given a function's address, attempt to find (and return) the | |
1673 | corresponding (canonical) function descriptor. Return 0 if | |
1674 | not found. */ | |
1675 | static CORE_ADDR | |
1676 | find_extant_func_descr (CORE_ADDR faddr) | |
1677 | { | |
76d689a6 | 1678 | struct obj_section *faddr_sect; |
64a5b29c KB |
1679 | |
1680 | /* Return early if faddr is already a function descriptor */ | |
76d689a6 KB |
1681 | faddr_sect = find_pc_section (faddr); |
1682 | if (faddr_sect && strcmp (faddr_sect->the_bfd_section->name, ".opd") == 0) | |
64a5b29c KB |
1683 | return faddr; |
1684 | ||
76d689a6 | 1685 | if (faddr_sect != NULL) |
64a5b29c | 1686 | { |
76d689a6 KB |
1687 | struct obj_section *osect; |
1688 | ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect) | |
64a5b29c KB |
1689 | { |
1690 | if (strcmp (osect->the_bfd_section->name, ".opd") == 0) | |
1691 | break; | |
1692 | } | |
1693 | ||
76d689a6 | 1694 | if (osect < faddr_sect->objfile->sections_end) |
64a5b29c KB |
1695 | { |
1696 | CORE_ADDR addr; | |
1697 | ||
1698 | addr = osect->addr; | |
1699 | while (addr < osect->endaddr) | |
1700 | { | |
1701 | int status; | |
1702 | LONGEST faddr2; | |
1703 | char buf[8]; | |
1704 | ||
1705 | status = target_read_memory (addr, buf, sizeof (buf)); | |
1706 | if (status != 0) | |
1707 | break; | |
1708 | faddr2 = extract_signed_integer (buf, sizeof (buf)); | |
1709 | ||
1710 | if (faddr == faddr2) | |
1711 | return addr; | |
1712 | ||
1713 | addr += 16; | |
1714 | } | |
1715 | } | |
1716 | } | |
1717 | return 0; | |
1718 | } | |
1719 | ||
1720 | /* Attempt to find a function descriptor corresponding to the | |
1721 | given address. If none is found, construct one on the | |
1722 | stack using the address at fdaptr */ | |
1723 | ||
1724 | static CORE_ADDR | |
1725 | find_func_descr (CORE_ADDR faddr, CORE_ADDR *fdaptr) | |
1726 | { | |
1727 | CORE_ADDR fdesc; | |
1728 | ||
1729 | fdesc = find_extant_func_descr (faddr); | |
1730 | ||
1731 | if (fdesc == 0) | |
1732 | { | |
1733 | CORE_ADDR global_pointer; | |
1734 | char buf[16]; | |
1735 | ||
1736 | fdesc = *fdaptr; | |
1737 | *fdaptr += 16; | |
1738 | ||
698cb3f0 | 1739 | global_pointer = FIND_GLOBAL_POINTER (faddr); |
64a5b29c KB |
1740 | |
1741 | if (global_pointer == 0) | |
1742 | global_pointer = read_register (IA64_GR1_REGNUM); | |
1743 | ||
1744 | store_address (buf, 8, faddr); | |
1745 | store_address (buf + 8, 8, global_pointer); | |
1746 | ||
1747 | write_memory (fdesc, buf, 16); | |
1748 | } | |
1749 | ||
1750 | return fdesc; | |
1751 | } | |
16461d7d KB |
1752 | |
1753 | CORE_ADDR | |
ea7c478f | 1754 | ia64_push_arguments (int nargs, struct value **args, CORE_ADDR sp, |
16461d7d KB |
1755 | int struct_return, CORE_ADDR struct_addr) |
1756 | { | |
1757 | int argno; | |
ea7c478f | 1758 | struct value *arg; |
16461d7d KB |
1759 | struct type *type; |
1760 | int len, argoffset; | |
64a5b29c | 1761 | int nslots, rseslots, memslots, slotnum, nfuncargs; |
16461d7d | 1762 | int floatreg; |
64a5b29c | 1763 | CORE_ADDR bsp, cfm, pfs, new_bsp, funcdescaddr; |
16461d7d KB |
1764 | |
1765 | nslots = 0; | |
64a5b29c | 1766 | nfuncargs = 0; |
16461d7d KB |
1767 | /* Count the number of slots needed for the arguments */ |
1768 | for (argno = 0; argno < nargs; argno++) | |
1769 | { | |
1770 | arg = args[argno]; | |
1771 | type = check_typedef (VALUE_TYPE (arg)); | |
1772 | len = TYPE_LENGTH (type); | |
1773 | ||
98f96ba1 | 1774 | if ((nslots & 1) && slot_alignment_is_next_even (type)) |
16461d7d KB |
1775 | nslots++; |
1776 | ||
64a5b29c KB |
1777 | if (TYPE_CODE (type) == TYPE_CODE_FUNC) |
1778 | nfuncargs++; | |
1779 | ||
16461d7d KB |
1780 | nslots += (len + 7) / 8; |
1781 | } | |
1782 | ||
64a5b29c | 1783 | /* Divvy up the slots between the RSE and the memory stack */ |
16461d7d KB |
1784 | rseslots = (nslots > 8) ? 8 : nslots; |
1785 | memslots = nslots - rseslots; | |
1786 | ||
64a5b29c | 1787 | /* Allocate a new RSE frame */ |
16461d7d KB |
1788 | cfm = read_register (IA64_CFM_REGNUM); |
1789 | ||
1790 | bsp = read_register (IA64_BSP_REGNUM); | |
1791 | bsp = rse_address_add (bsp, cfm & 0x7f); | |
1792 | new_bsp = rse_address_add (bsp, rseslots); | |
1793 | write_register (IA64_BSP_REGNUM, new_bsp); | |
1794 | ||
1795 | pfs = read_register (IA64_PFS_REGNUM); | |
1796 | pfs &= 0xc000000000000000LL; | |
1797 | pfs |= (cfm & 0xffffffffffffLL); | |
1798 | write_register (IA64_PFS_REGNUM, pfs); | |
1799 | ||
1800 | cfm &= 0xc000000000000000LL; | |
1801 | cfm |= rseslots; | |
1802 | write_register (IA64_CFM_REGNUM, cfm); | |
1803 | ||
64a5b29c KB |
1804 | /* We will attempt to find function descriptors in the .opd segment, |
1805 | but if we can't we'll construct them ourselves. That being the | |
1806 | case, we'll need to reserve space on the stack for them. */ | |
1807 | funcdescaddr = sp - nfuncargs * 16; | |
1808 | funcdescaddr &= ~0xfLL; | |
1809 | ||
1810 | /* Adjust the stack pointer to it's new value. The calling conventions | |
1811 | require us to have 16 bytes of scratch, plus whatever space is | |
1812 | necessary for the memory slots and our function descriptors */ | |
1813 | sp = sp - 16 - (memslots + nfuncargs) * 8; | |
16461d7d KB |
1814 | sp &= ~0xfLL; /* Maintain 16 byte alignment */ |
1815 | ||
64a5b29c KB |
1816 | /* Place the arguments where they belong. The arguments will be |
1817 | either placed in the RSE backing store or on the memory stack. | |
1818 | In addition, floating point arguments or HFAs are placed in | |
1819 | floating point registers. */ | |
16461d7d KB |
1820 | slotnum = 0; |
1821 | floatreg = IA64_FR8_REGNUM; | |
1822 | for (argno = 0; argno < nargs; argno++) | |
1823 | { | |
64a5b29c KB |
1824 | struct type *float_elt_type; |
1825 | ||
16461d7d KB |
1826 | arg = args[argno]; |
1827 | type = check_typedef (VALUE_TYPE (arg)); | |
1828 | len = TYPE_LENGTH (type); | |
64a5b29c KB |
1829 | |
1830 | /* Special handling for function parameters */ | |
1831 | if (len == 8 | |
1832 | && TYPE_CODE (type) == TYPE_CODE_PTR | |
1833 | && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC) | |
1834 | { | |
1835 | char val_buf[8]; | |
1836 | ||
1837 | store_address (val_buf, 8, | |
1838 | find_func_descr (extract_address (VALUE_CONTENTS (arg), 8), | |
1839 | &funcdescaddr)); | |
1840 | if (slotnum < rseslots) | |
1841 | write_memory (rse_address_add (bsp, slotnum), val_buf, 8); | |
1842 | else | |
1843 | write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8); | |
1844 | slotnum++; | |
1845 | continue; | |
1846 | } | |
1847 | ||
1848 | /* Normal slots */ | |
98f96ba1 KB |
1849 | |
1850 | /* Skip odd slot if necessary... */ | |
1851 | if ((slotnum & 1) && slot_alignment_is_next_even (type)) | |
16461d7d | 1852 | slotnum++; |
98f96ba1 | 1853 | |
16461d7d KB |
1854 | argoffset = 0; |
1855 | while (len > 0) | |
1856 | { | |
1857 | char val_buf[8]; | |
1858 | ||
1859 | memset (val_buf, 0, 8); | |
1860 | memcpy (val_buf, VALUE_CONTENTS (arg) + argoffset, (len > 8) ? 8 : len); | |
1861 | ||
1862 | if (slotnum < rseslots) | |
1863 | write_memory (rse_address_add (bsp, slotnum), val_buf, 8); | |
1864 | else | |
1865 | write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8); | |
1866 | ||
1867 | argoffset += 8; | |
1868 | len -= 8; | |
1869 | slotnum++; | |
1870 | } | |
64a5b29c KB |
1871 | |
1872 | /* Handle floating point types (including HFAs) */ | |
1873 | float_elt_type = is_float_or_hfa_type (type); | |
1874 | if (float_elt_type != NULL) | |
1875 | { | |
1876 | argoffset = 0; | |
1877 | len = TYPE_LENGTH (type); | |
1878 | while (len > 0 && floatreg < IA64_FR16_REGNUM) | |
1879 | { | |
1880 | ia64_register_convert_to_raw ( | |
1881 | float_elt_type, | |
1882 | floatreg, | |
1883 | VALUE_CONTENTS (arg) + argoffset, | |
1884 | ®isters[REGISTER_BYTE (floatreg)]); | |
1885 | floatreg++; | |
1886 | argoffset += TYPE_LENGTH (float_elt_type); | |
1887 | len -= TYPE_LENGTH (float_elt_type); | |
1888 | } | |
16461d7d KB |
1889 | } |
1890 | } | |
1891 | ||
64a5b29c | 1892 | /* Store the struct return value in r8 if necessary. */ |
16461d7d KB |
1893 | if (struct_return) |
1894 | { | |
1895 | store_address (®isters[REGISTER_BYTE (IA64_GR8_REGNUM)], | |
1896 | REGISTER_RAW_SIZE (IA64_GR8_REGNUM), | |
1897 | struct_addr); | |
1898 | } | |
1899 | ||
64a5b29c | 1900 | /* Sync gdb's idea of what the registers are with the target. */ |
16461d7d KB |
1901 | target_store_registers (-1); |
1902 | ||
1903 | /* FIXME: This doesn't belong here! Instead, SAVE_DUMMY_FRAME_TOS needs | |
1904 | to be defined to call generic_save_dummy_frame_tos(). But at the | |
1905 | time of this writing, SAVE_DUMMY_FRAME_TOS wasn't gdbarch'd, so | |
1906 | I chose to put this call here instead of using the old mechanisms. | |
1907 | Once SAVE_DUMMY_FRAME_TOS is gdbarch'd, all we need to do is add the | |
1908 | line | |
1909 | ||
1910 | set_gdbarch_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos); | |
1911 | ||
1912 | to ia64_gdbarch_init() and remove the line below. */ | |
1913 | generic_save_dummy_frame_tos (sp); | |
1914 | ||
1915 | return sp; | |
1916 | } | |
1917 | ||
1918 | CORE_ADDR | |
1919 | ia64_push_return_address (CORE_ADDR pc, CORE_ADDR sp) | |
1920 | { | |
698cb3f0 | 1921 | CORE_ADDR global_pointer = FIND_GLOBAL_POINTER (pc); |
16461d7d | 1922 | |
64a5b29c KB |
1923 | if (global_pointer != 0) |
1924 | write_register (IA64_GR1_REGNUM, global_pointer); | |
16461d7d KB |
1925 | |
1926 | write_register (IA64_BR0_REGNUM, CALL_DUMMY_ADDRESS ()); | |
1927 | return sp; | |
1928 | } | |
1929 | ||
1930 | void | |
1931 | ia64_store_return_value (struct type *type, char *valbuf) | |
1932 | { | |
1933 | if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
1934 | { | |
1935 | ia64_register_convert_to_raw (type, IA64_FR8_REGNUM, valbuf, | |
1936 | ®isters[REGISTER_BYTE (IA64_FR8_REGNUM)]); | |
1937 | target_store_registers (IA64_FR8_REGNUM); | |
1938 | } | |
1939 | else | |
1940 | write_register_bytes (REGISTER_BYTE (IA64_GR8_REGNUM), | |
1941 | valbuf, TYPE_LENGTH (type)); | |
1942 | } | |
1943 | ||
1944 | void | |
1945 | ia64_pop_frame (void) | |
1946 | { | |
1947 | generic_pop_current_frame (ia64_pop_frame_regular); | |
1948 | } | |
1949 | ||
1950 | static void | |
1951 | ia64_pop_frame_regular (struct frame_info *frame) | |
1952 | { | |
1953 | int regno; | |
1954 | CORE_ADDR bsp, cfm, pfs; | |
1955 | ||
1956 | FRAME_INIT_SAVED_REGS (frame); | |
1957 | ||
1958 | for (regno = 0; regno < ia64_num_regs; regno++) | |
1959 | { | |
1960 | if (frame->saved_regs[regno] | |
1961 | && (!(IA64_GR32_REGNUM <= regno && regno <= IA64_GR127_REGNUM)) | |
1962 | && regno != pc_regnum | |
1963 | && regno != sp_regnum | |
1964 | && regno != IA64_PFS_REGNUM | |
1965 | && regno != IA64_CFM_REGNUM | |
1966 | && regno != IA64_BSP_REGNUM | |
1967 | && regno != IA64_BSPSTORE_REGNUM) | |
1968 | { | |
1969 | write_register (regno, | |
1970 | read_memory_integer (frame->saved_regs[regno], | |
1971 | REGISTER_RAW_SIZE (regno))); | |
1972 | } | |
1973 | } | |
1974 | ||
1975 | write_register (sp_regnum, FRAME_CHAIN (frame)); | |
1976 | write_pc (FRAME_SAVED_PC (frame)); | |
1977 | ||
1978 | cfm = read_register (IA64_CFM_REGNUM); | |
1979 | ||
1980 | if (frame->saved_regs[IA64_PFS_REGNUM]) | |
1981 | { | |
1982 | pfs = read_memory_integer (frame->saved_regs[IA64_PFS_REGNUM], | |
1983 | REGISTER_RAW_SIZE (IA64_PFS_REGNUM)); | |
1984 | } | |
1985 | else | |
1986 | pfs = read_register (IA64_PFS_REGNUM); | |
1987 | ||
1988 | /* Compute the new bsp by *adding* the difference between the | |
1989 | size of the frame and the size of the locals (both wrt the | |
1990 | frame that we're going back to). This seems kind of strange, | |
1991 | especially since it seems like we ought to be subtracting the | |
1992 | size of the locals... and we should; but the linux kernel | |
1993 | wants bsp to be set at the end of all used registers. It's | |
1994 | likely that this code will need to be revised to accomodate | |
1995 | other operating systems. */ | |
1996 | bsp = rse_address_add (frame->extra_info->bsp, | |
1997 | (pfs & 0x7f) - ((pfs >> 7) & 0x7f)); | |
1998 | write_register (IA64_BSP_REGNUM, bsp); | |
1999 | ||
2000 | /* FIXME: What becomes of the epilog count in the PFS? */ | |
2001 | cfm = (cfm & ~0xffffffffffffLL) | (pfs & 0xffffffffffffLL); | |
2002 | write_register (IA64_CFM_REGNUM, cfm); | |
2003 | ||
2004 | flush_cached_frames (); | |
2005 | } | |
2006 | ||
2007 | static void | |
2008 | ia64_remote_translate_xfer_address (CORE_ADDR memaddr, int nr_bytes, | |
2009 | CORE_ADDR *targ_addr, int *targ_len) | |
2010 | { | |
2011 | *targ_addr = memaddr; | |
2012 | *targ_len = nr_bytes; | |
2013 | } | |
2014 | ||
244bc108 KB |
2015 | static void |
2016 | process_note_abi_tag_sections (bfd *abfd, asection *sect, void *obj) | |
2017 | { | |
2018 | int *os_ident_ptr = obj; | |
2019 | const char *name; | |
2020 | unsigned int sectsize; | |
2021 | ||
2022 | name = bfd_get_section_name (abfd, sect); | |
2023 | sectsize = bfd_section_size (abfd, sect); | |
2024 | if (strcmp (name, ".note.ABI-tag") == 0 && sectsize > 0) | |
2025 | { | |
2026 | unsigned int name_length, data_length, note_type; | |
2027 | char *note = alloca (sectsize); | |
2028 | ||
2029 | bfd_get_section_contents (abfd, sect, note, | |
2030 | (file_ptr) 0, (bfd_size_type) sectsize); | |
2031 | ||
2032 | name_length = bfd_h_get_32 (abfd, note); | |
2033 | data_length = bfd_h_get_32 (abfd, note + 4); | |
2034 | note_type = bfd_h_get_32 (abfd, note + 8); | |
2035 | ||
2036 | if (name_length == 4 && data_length == 16 && note_type == 1 | |
2037 | && strcmp (note + 12, "GNU") == 0) | |
2038 | { | |
2039 | int os_number = bfd_h_get_32 (abfd, note + 16); | |
2040 | ||
2041 | /* The case numbers are from abi-tags in glibc */ | |
2042 | switch (os_number) | |
2043 | { | |
2044 | case 0 : | |
2045 | *os_ident_ptr = ELFOSABI_LINUX; | |
2046 | break; | |
244bc108 KB |
2047 | case 1 : |
2048 | *os_ident_ptr = ELFOSABI_HURD; | |
2049 | break; | |
2050 | case 2 : | |
2051 | *os_ident_ptr = ELFOSABI_SOLARIS; | |
2052 | break; | |
244bc108 | 2053 | default : |
8e65ff28 AC |
2054 | internal_error (__FILE__, __LINE__, |
2055 | "process_note_abi_sections: unknown OS number %d", os_number); | |
244bc108 KB |
2056 | break; |
2057 | } | |
2058 | } | |
2059 | } | |
2060 | } | |
2061 | ||
16461d7d KB |
2062 | static struct gdbarch * |
2063 | ia64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
2064 | { | |
2065 | struct gdbarch *gdbarch; | |
244bc108 KB |
2066 | struct gdbarch_tdep *tdep; |
2067 | int os_ident; | |
2068 | ||
2069 | if (info.abfd != NULL | |
2070 | && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour) | |
2071 | { | |
2072 | os_ident = elf_elfheader (info.abfd)->e_ident[EI_OSABI]; | |
2073 | ||
2074 | /* If os_ident is 0, it is not necessarily the case that we're on a | |
02240683 | 2075 | SYSV system. (ELFOSABI_NONE is defined to be 0.) GNU/Linux uses |
244bc108 KB |
2076 | a note section to record OS/ABI info, but leaves e_ident[EI_OSABI] |
2077 | zero. So we have to check for note sections too. */ | |
2078 | if (os_ident == 0) | |
2079 | { | |
2080 | bfd_map_over_sections (info.abfd, | |
2081 | process_note_abi_tag_sections, | |
2082 | &os_ident); | |
2083 | } | |
2084 | } | |
2085 | else | |
2086 | os_ident = -1; | |
16461d7d | 2087 | |
244bc108 KB |
2088 | for (arches = gdbarch_list_lookup_by_info (arches, &info); |
2089 | arches != NULL; | |
2090 | arches = gdbarch_list_lookup_by_info (arches->next, &info)) | |
2091 | { | |
2092 | if (gdbarch_tdep (current_gdbarch)->os_ident != os_ident) | |
2093 | continue; | |
2094 | return arches->gdbarch; | |
2095 | } | |
16461d7d | 2096 | |
244bc108 KB |
2097 | tdep = xmalloc (sizeof (struct gdbarch_tdep)); |
2098 | gdbarch = gdbarch_alloc (&info, tdep); | |
2099 | tdep->os_ident = os_ident; | |
2100 | ||
d7fa2ae2 KB |
2101 | |
2102 | /* Set the method of obtaining the sigcontext addresses at which | |
2103 | registers are saved. The method of checking to see if | |
2104 | native_find_global_pointer is nonzero to indicate that we're | |
2105 | on AIX is kind of hokey, but I can't think of a better way | |
2106 | to do it. */ | |
244bc108 KB |
2107 | if (os_ident == ELFOSABI_LINUX) |
2108 | tdep->sigcontext_register_address = ia64_linux_sigcontext_register_address; | |
d7fa2ae2 KB |
2109 | else if (native_find_global_pointer != 0) |
2110 | tdep->sigcontext_register_address = ia64_aix_sigcontext_register_address; | |
244bc108 KB |
2111 | else |
2112 | tdep->sigcontext_register_address = 0; | |
16461d7d | 2113 | |
698cb3f0 KB |
2114 | /* We know that Linux won't have to resort to the native_find_global_pointer |
2115 | hackery. But that's the only one we know about so far, so if | |
2116 | native_find_global_pointer is set to something non-zero, then use | |
2117 | it. Otherwise fall back to using generic_elf_find_global_pointer. | |
2118 | This arrangement should (in theory) allow us to cross debug Linux | |
2119 | binaries from an AIX machine. */ | |
2120 | if (os_ident == ELFOSABI_LINUX) | |
2121 | tdep->find_global_pointer = generic_elf_find_global_pointer; | |
2122 | else if (native_find_global_pointer != 0) | |
2123 | tdep->find_global_pointer = native_find_global_pointer; | |
2124 | else | |
2125 | tdep->find_global_pointer = generic_elf_find_global_pointer; | |
2126 | ||
16461d7d KB |
2127 | set_gdbarch_short_bit (gdbarch, 16); |
2128 | set_gdbarch_int_bit (gdbarch, 32); | |
2129 | set_gdbarch_long_bit (gdbarch, 64); | |
2130 | set_gdbarch_long_long_bit (gdbarch, 64); | |
2131 | set_gdbarch_float_bit (gdbarch, 32); | |
2132 | set_gdbarch_double_bit (gdbarch, 64); | |
2133 | set_gdbarch_long_double_bit (gdbarch, 64); | |
2134 | set_gdbarch_ptr_bit (gdbarch, 64); | |
2135 | ||
2136 | set_gdbarch_num_regs (gdbarch, ia64_num_regs); | |
2137 | set_gdbarch_sp_regnum (gdbarch, sp_regnum); | |
2138 | set_gdbarch_fp_regnum (gdbarch, fp_regnum); | |
2139 | set_gdbarch_pc_regnum (gdbarch, pc_regnum); | |
698cb3f0 | 2140 | set_gdbarch_fp0_regnum (gdbarch, IA64_FR0_REGNUM); |
16461d7d KB |
2141 | |
2142 | set_gdbarch_register_name (gdbarch, ia64_register_name); | |
2143 | set_gdbarch_register_size (gdbarch, 8); | |
2144 | set_gdbarch_register_bytes (gdbarch, ia64_num_regs * 8 + 128*8); | |
2145 | set_gdbarch_register_byte (gdbarch, ia64_register_byte); | |
2146 | set_gdbarch_register_raw_size (gdbarch, ia64_register_raw_size); | |
2147 | set_gdbarch_max_register_raw_size (gdbarch, 16); | |
2148 | set_gdbarch_register_virtual_size (gdbarch, ia64_register_virtual_size); | |
2149 | set_gdbarch_max_register_virtual_size (gdbarch, 16); | |
2150 | set_gdbarch_register_virtual_type (gdbarch, ia64_register_virtual_type); | |
2151 | ||
2152 | set_gdbarch_skip_prologue (gdbarch, ia64_skip_prologue); | |
2153 | ||
2154 | set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown); | |
2155 | set_gdbarch_frameless_function_invocation (gdbarch, ia64_frameless_function_invocation); | |
2156 | ||
2157 | set_gdbarch_saved_pc_after_call (gdbarch, ia64_saved_pc_after_call); | |
2158 | ||
2159 | set_gdbarch_frame_chain (gdbarch, ia64_frame_chain); | |
244bc108 | 2160 | set_gdbarch_frame_chain_valid (gdbarch, generic_func_frame_chain_valid); |
16461d7d KB |
2161 | set_gdbarch_frame_saved_pc (gdbarch, ia64_frame_saved_pc); |
2162 | ||
2163 | set_gdbarch_frame_init_saved_regs (gdbarch, ia64_frame_init_saved_regs); | |
2164 | set_gdbarch_get_saved_register (gdbarch, ia64_get_saved_register); | |
2165 | ||
2166 | set_gdbarch_register_convertible (gdbarch, ia64_register_convertible); | |
2167 | set_gdbarch_register_convert_to_virtual (gdbarch, ia64_register_convert_to_virtual); | |
2168 | set_gdbarch_register_convert_to_raw (gdbarch, ia64_register_convert_to_raw); | |
2169 | ||
2170 | set_gdbarch_use_struct_convention (gdbarch, ia64_use_struct_convention); | |
2171 | set_gdbarch_extract_return_value (gdbarch, ia64_extract_return_value); | |
2172 | ||
2173 | set_gdbarch_store_struct_return (gdbarch, ia64_store_struct_return); | |
2174 | set_gdbarch_store_return_value (gdbarch, ia64_store_return_value); | |
2175 | set_gdbarch_extract_struct_value_address (gdbarch, ia64_extract_struct_value_address); | |
2176 | ||
2177 | set_gdbarch_memory_insert_breakpoint (gdbarch, ia64_memory_insert_breakpoint); | |
2178 | set_gdbarch_memory_remove_breakpoint (gdbarch, ia64_memory_remove_breakpoint); | |
2179 | set_gdbarch_breakpoint_from_pc (gdbarch, ia64_breakpoint_from_pc); | |
2180 | set_gdbarch_read_pc (gdbarch, ia64_read_pc); | |
2181 | set_gdbarch_write_pc (gdbarch, ia64_write_pc); | |
2182 | ||
2183 | /* Settings for calling functions in the inferior. */ | |
2184 | set_gdbarch_use_generic_dummy_frames (gdbarch, 1); | |
2185 | set_gdbarch_call_dummy_length (gdbarch, 0); | |
2186 | set_gdbarch_push_arguments (gdbarch, ia64_push_arguments); | |
2187 | set_gdbarch_push_return_address (gdbarch, ia64_push_return_address); | |
2188 | set_gdbarch_pop_frame (gdbarch, ia64_pop_frame); | |
2189 | ||
2190 | set_gdbarch_call_dummy_p (gdbarch, 1); | |
2191 | set_gdbarch_call_dummy_words (gdbarch, ia64_call_dummy_words); | |
2192 | set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof (ia64_call_dummy_words)); | |
2193 | set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1); | |
2194 | set_gdbarch_init_extra_frame_info (gdbarch, ia64_init_extra_frame_info); | |
2195 | set_gdbarch_frame_args_address (gdbarch, ia64_frame_args_address); | |
2196 | set_gdbarch_frame_locals_address (gdbarch, ia64_frame_locals_address); | |
2197 | ||
2198 | /* We won't necessarily have a frame pointer and even if we do, | |
2199 | it winds up being extraordinarly messy when attempting to find | |
2200 | the frame chain. So for the purposes of creating frames (which | |
2201 | is all read_fp() is used for), simply use the stack pointer value | |
2202 | instead. */ | |
2203 | set_gdbarch_read_fp (gdbarch, generic_target_read_sp); | |
2204 | set_gdbarch_write_fp (gdbarch, generic_target_write_sp); | |
2205 | ||
2206 | /* Settings that should be unnecessary. */ | |
2207 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); | |
2208 | ||
2209 | set_gdbarch_read_sp (gdbarch, generic_target_read_sp); | |
2210 | set_gdbarch_write_sp (gdbarch, generic_target_write_sp); | |
2211 | ||
2212 | set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT); | |
2213 | set_gdbarch_call_dummy_address (gdbarch, entry_point_address); | |
2214 | set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0); | |
2215 | set_gdbarch_call_dummy_start_offset (gdbarch, 0); | |
2216 | set_gdbarch_pc_in_call_dummy (gdbarch, generic_pc_in_call_dummy); | |
2217 | set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0); | |
2218 | set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame); | |
2219 | set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy); | |
2220 | ||
2221 | set_gdbarch_decr_pc_after_break (gdbarch, 0); | |
2222 | set_gdbarch_function_start_offset (gdbarch, 0); | |
2223 | ||
2224 | set_gdbarch_remote_translate_xfer_address ( | |
2225 | gdbarch, ia64_remote_translate_xfer_address); | |
2226 | ||
2227 | return gdbarch; | |
2228 | } | |
2229 | ||
2230 | void | |
2231 | _initialize_ia64_tdep (void) | |
2232 | { | |
2233 | register_gdbarch_init (bfd_arch_ia64, ia64_gdbarch_init); | |
2234 | ||
2235 | tm_print_insn = print_insn_ia64; | |
2236 | tm_print_insn_info.bytes_per_line = SLOT_MULTIPLIER; | |
2237 | } |