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16461d7d | 1 | /* Target-dependent code for the IA-64 for GDB, the GNU debugger. |
ca557f44 | 2 | |
51603483 | 3 | Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
16461d7d KB |
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" |
004d836a JJ |
29 | #include "reggroups.h" |
30 | #include "frame.h" | |
31 | #include "frame-base.h" | |
32 | #include "frame-unwind.h" | |
d16aafd8 | 33 | #include "doublest.h" |
fd0407d6 | 34 | #include "value.h" |
bd1ce8ba | 35 | #include "gdb_assert.h" |
16461d7d KB |
36 | #include "objfiles.h" |
37 | #include "elf/common.h" /* for DT_PLTGOT value */ | |
244bc108 | 38 | #include "elf-bfd.h" |
16461d7d | 39 | |
698cb3f0 KB |
40 | /* Hook for determining the global pointer when calling functions in |
41 | the inferior under AIX. The initialization code in ia64-aix-nat.c | |
42 | sets this hook to the address of a function which will find the | |
43 | global pointer for a given address. | |
44 | ||
45 | The generic code which uses the dynamic section in the inferior for | |
46 | finding the global pointer is not of much use on AIX since the | |
47 | values obtained from the inferior have not been relocated. */ | |
48 | ||
49 | CORE_ADDR (*native_find_global_pointer) (CORE_ADDR) = 0; | |
50 | ||
51 | /* An enumeration of the different IA-64 instruction types. */ | |
52 | ||
16461d7d KB |
53 | typedef enum instruction_type |
54 | { | |
55 | A, /* Integer ALU ; I-unit or M-unit */ | |
56 | I, /* Non-ALU integer; I-unit */ | |
57 | M, /* Memory ; M-unit */ | |
58 | F, /* Floating-point ; F-unit */ | |
59 | B, /* Branch ; B-unit */ | |
60 | L, /* Extended (L+X) ; I-unit */ | |
61 | X, /* Extended (L+X) ; I-unit */ | |
62 | undefined /* undefined or reserved */ | |
63 | } instruction_type; | |
64 | ||
65 | /* We represent IA-64 PC addresses as the value of the instruction | |
66 | pointer or'd with some bit combination in the low nibble which | |
67 | represents the slot number in the bundle addressed by the | |
68 | instruction pointer. The problem is that the Linux kernel | |
69 | multiplies its slot numbers (for exceptions) by one while the | |
70 | disassembler multiplies its slot numbers by 6. In addition, I've | |
71 | heard it said that the simulator uses 1 as the multiplier. | |
72 | ||
73 | I've fixed the disassembler so that the bytes_per_line field will | |
74 | be the slot multiplier. If bytes_per_line comes in as zero, it | |
75 | is set to six (which is how it was set up initially). -- objdump | |
76 | displays pretty disassembly dumps with this value. For our purposes, | |
77 | we'll set bytes_per_line to SLOT_MULTIPLIER. This is okay since we | |
78 | never want to also display the raw bytes the way objdump does. */ | |
79 | ||
80 | #define SLOT_MULTIPLIER 1 | |
81 | ||
82 | /* Length in bytes of an instruction bundle */ | |
83 | ||
84 | #define BUNDLE_LEN 16 | |
85 | ||
d7fa2ae2 | 86 | /* FIXME: These extern declarations should go in ia64-tdep.h. */ |
244bc108 | 87 | extern CORE_ADDR ia64_linux_sigcontext_register_address (CORE_ADDR, int); |
d7fa2ae2 | 88 | extern CORE_ADDR ia64_aix_sigcontext_register_address (CORE_ADDR, int); |
244bc108 | 89 | |
16461d7d KB |
90 | static gdbarch_init_ftype ia64_gdbarch_init; |
91 | ||
92 | static gdbarch_register_name_ftype ia64_register_name; | |
004d836a | 93 | static gdbarch_register_type_ftype ia64_register_type; |
16461d7d | 94 | static gdbarch_breakpoint_from_pc_ftype ia64_breakpoint_from_pc; |
16461d7d | 95 | static gdbarch_skip_prologue_ftype ia64_skip_prologue; |
004d836a JJ |
96 | static gdbarch_extract_return_value_ftype ia64_extract_return_value; |
97 | static gdbarch_extract_struct_value_address_ftype ia64_extract_struct_value_address; | |
16461d7d | 98 | static gdbarch_use_struct_convention_ftype ia64_use_struct_convention; |
64a5b29c | 99 | static struct type *is_float_or_hfa_type (struct type *t); |
16461d7d | 100 | |
004d836a JJ |
101 | static struct type *builtin_type_ia64_ext; |
102 | ||
103 | #define NUM_IA64_RAW_REGS 462 | |
16461d7d | 104 | |
16461d7d KB |
105 | static int sp_regnum = IA64_GR12_REGNUM; |
106 | static int fp_regnum = IA64_VFP_REGNUM; | |
107 | static int lr_regnum = IA64_VRAP_REGNUM; | |
108 | ||
004d836a JJ |
109 | /* NOTE: we treat the register stack registers r32-r127 as pseudo-registers because |
110 | they are in memory and must be calculated via the bsp register. */ | |
111 | enum pseudo_regs { FIRST_PSEUDO_REGNUM = NUM_IA64_RAW_REGS, VBOF_REGNUM = IA64_NAT127_REGNUM + 1, V32_REGNUM, | |
112 | V127_REGNUM = V32_REGNUM + 95, | |
113 | VP0_REGNUM, VP16_REGNUM = VP0_REGNUM + 16, VP63_REGNUM = VP0_REGNUM + 63, LAST_PSEUDO_REGNUM }; | |
16461d7d KB |
114 | |
115 | /* Array of register names; There should be ia64_num_regs strings in | |
116 | the initializer. */ | |
117 | ||
118 | static char *ia64_register_names[] = | |
119 | { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
120 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
121 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
122 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
004d836a JJ |
123 | "", "", "", "", "", "", "", "", |
124 | "", "", "", "", "", "", "", "", | |
125 | "", "", "", "", "", "", "", "", | |
126 | "", "", "", "", "", "", "", "", | |
127 | "", "", "", "", "", "", "", "", | |
128 | "", "", "", "", "", "", "", "", | |
129 | "", "", "", "", "", "", "", "", | |
130 | "", "", "", "", "", "", "", "", | |
131 | "", "", "", "", "", "", "", "", | |
132 | "", "", "", "", "", "", "", "", | |
133 | "", "", "", "", "", "", "", "", | |
134 | "", "", "", "", "", "", "", "", | |
16461d7d KB |
135 | |
136 | "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", | |
137 | "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", | |
138 | "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", | |
139 | "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", | |
140 | "f32", "f33", "f34", "f35", "f36", "f37", "f38", "f39", | |
141 | "f40", "f41", "f42", "f43", "f44", "f45", "f46", "f47", | |
142 | "f48", "f49", "f50", "f51", "f52", "f53", "f54", "f55", | |
143 | "f56", "f57", "f58", "f59", "f60", "f61", "f62", "f63", | |
144 | "f64", "f65", "f66", "f67", "f68", "f69", "f70", "f71", | |
145 | "f72", "f73", "f74", "f75", "f76", "f77", "f78", "f79", | |
146 | "f80", "f81", "f82", "f83", "f84", "f85", "f86", "f87", | |
147 | "f88", "f89", "f90", "f91", "f92", "f93", "f94", "f95", | |
148 | "f96", "f97", "f98", "f99", "f100", "f101", "f102", "f103", | |
149 | "f104", "f105", "f106", "f107", "f108", "f109", "f110", "f111", | |
150 | "f112", "f113", "f114", "f115", "f116", "f117", "f118", "f119", | |
151 | "f120", "f121", "f122", "f123", "f124", "f125", "f126", "f127", | |
152 | ||
004d836a JJ |
153 | "", "", "", "", "", "", "", "", |
154 | "", "", "", "", "", "", "", "", | |
155 | "", "", "", "", "", "", "", "", | |
156 | "", "", "", "", "", "", "", "", | |
157 | "", "", "", "", "", "", "", "", | |
158 | "", "", "", "", "", "", "", "", | |
159 | "", "", "", "", "", "", "", "", | |
160 | "", "", "", "", "", "", "", "", | |
16461d7d KB |
161 | |
162 | "b0", "b1", "b2", "b3", "b4", "b5", "b6", "b7", | |
163 | ||
164 | "vfp", "vrap", | |
165 | ||
166 | "pr", "ip", "psr", "cfm", | |
167 | ||
168 | "kr0", "kr1", "kr2", "kr3", "kr4", "kr5", "kr6", "kr7", | |
169 | "", "", "", "", "", "", "", "", | |
170 | "rsc", "bsp", "bspstore", "rnat", | |
171 | "", "fcr", "", "", | |
172 | "eflag", "csd", "ssd", "cflg", "fsr", "fir", "fdr", "", | |
173 | "ccv", "", "", "", "unat", "", "", "", | |
174 | "fpsr", "", "", "", "itc", | |
175 | "", "", "", "", "", "", "", "", "", "", | |
176 | "", "", "", "", "", "", "", "", "", | |
177 | "pfs", "lc", "ec", | |
178 | "", "", "", "", "", "", "", "", "", "", | |
179 | "", "", "", "", "", "", "", "", "", "", | |
180 | "", "", "", "", "", "", "", "", "", "", | |
181 | "", "", "", "", "", "", "", "", "", "", | |
182 | "", "", "", "", "", "", "", "", "", "", | |
183 | "", "", "", "", "", "", "", "", "", "", | |
184 | "", | |
185 | "nat0", "nat1", "nat2", "nat3", "nat4", "nat5", "nat6", "nat7", | |
186 | "nat8", "nat9", "nat10", "nat11", "nat12", "nat13", "nat14", "nat15", | |
187 | "nat16", "nat17", "nat18", "nat19", "nat20", "nat21", "nat22", "nat23", | |
188 | "nat24", "nat25", "nat26", "nat27", "nat28", "nat29", "nat30", "nat31", | |
189 | "nat32", "nat33", "nat34", "nat35", "nat36", "nat37", "nat38", "nat39", | |
190 | "nat40", "nat41", "nat42", "nat43", "nat44", "nat45", "nat46", "nat47", | |
191 | "nat48", "nat49", "nat50", "nat51", "nat52", "nat53", "nat54", "nat55", | |
192 | "nat56", "nat57", "nat58", "nat59", "nat60", "nat61", "nat62", "nat63", | |
193 | "nat64", "nat65", "nat66", "nat67", "nat68", "nat69", "nat70", "nat71", | |
194 | "nat72", "nat73", "nat74", "nat75", "nat76", "nat77", "nat78", "nat79", | |
195 | "nat80", "nat81", "nat82", "nat83", "nat84", "nat85", "nat86", "nat87", | |
196 | "nat88", "nat89", "nat90", "nat91", "nat92", "nat93", "nat94", "nat95", | |
197 | "nat96", "nat97", "nat98", "nat99", "nat100","nat101","nat102","nat103", | |
198 | "nat104","nat105","nat106","nat107","nat108","nat109","nat110","nat111", | |
199 | "nat112","nat113","nat114","nat115","nat116","nat117","nat118","nat119", | |
200 | "nat120","nat121","nat122","nat123","nat124","nat125","nat126","nat127", | |
004d836a JJ |
201 | |
202 | "bof", | |
203 | ||
204 | "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39", | |
205 | "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47", | |
206 | "r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55", | |
207 | "r56", "r57", "r58", "r59", "r60", "r61", "r62", "r63", | |
208 | "r64", "r65", "r66", "r67", "r68", "r69", "r70", "r71", | |
209 | "r72", "r73", "r74", "r75", "r76", "r77", "r78", "r79", | |
210 | "r80", "r81", "r82", "r83", "r84", "r85", "r86", "r87", | |
211 | "r88", "r89", "r90", "r91", "r92", "r93", "r94", "r95", | |
212 | "r96", "r97", "r98", "r99", "r100", "r101", "r102", "r103", | |
213 | "r104", "r105", "r106", "r107", "r108", "r109", "r110", "r111", | |
214 | "r112", "r113", "r114", "r115", "r116", "r117", "r118", "r119", | |
215 | "r120", "r121", "r122", "r123", "r124", "r125", "r126", "r127", | |
216 | ||
217 | "p0", "p1", "p2", "p3", "p4", "p5", "p6", "p7", | |
218 | "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15", | |
219 | "p16", "p17", "p18", "p19", "p20", "p21", "p22", "p23", | |
220 | "p24", "p25", "p26", "p27", "p28", "p29", "p30", "p31", | |
221 | "p32", "p33", "p34", "p35", "p36", "p37", "p38", "p39", | |
222 | "p40", "p41", "p42", "p43", "p44", "p45", "p46", "p47", | |
223 | "p48", "p49", "p50", "p51", "p52", "p53", "p54", "p55", | |
224 | "p56", "p57", "p58", "p59", "p60", "p61", "p62", "p63", | |
16461d7d KB |
225 | }; |
226 | ||
004d836a JJ |
227 | struct ia64_frame_cache |
228 | { | |
229 | CORE_ADDR base; /* frame pointer base for frame */ | |
230 | CORE_ADDR pc; /* function start pc for frame */ | |
231 | CORE_ADDR saved_sp; /* stack pointer for frame */ | |
232 | CORE_ADDR bsp; /* points at r32 for the current frame */ | |
233 | CORE_ADDR cfm; /* cfm value for current frame */ | |
234 | int frameless; | |
235 | int sof; /* Size of frame (decoded from cfm value) */ | |
236 | int sol; /* Size of locals (decoded from cfm value) */ | |
237 | int sor; /* Number of rotating registers. (decoded from cfm value) */ | |
238 | CORE_ADDR after_prologue; | |
239 | /* Address of first instruction after the last | |
240 | prologue instruction; Note that there may | |
241 | be instructions from the function's body | |
242 | intermingled with the prologue. */ | |
243 | int mem_stack_frame_size; | |
244 | /* Size of the memory stack frame (may be zero), | |
245 | or -1 if it has not been determined yet. */ | |
246 | int fp_reg; /* Register number (if any) used a frame pointer | |
244bc108 | 247 | for this frame. 0 if no register is being used |
16461d7d | 248 | as the frame pointer. */ |
004d836a JJ |
249 | |
250 | /* Saved registers. */ | |
251 | CORE_ADDR saved_regs[NUM_IA64_RAW_REGS]; | |
252 | ||
253 | }; | |
244bc108 KB |
254 | |
255 | struct gdbarch_tdep | |
256 | { | |
257 | int os_ident; /* From the ELF header, one of the ELFOSABI_ | |
ef58a6ac | 258 | constants: ELFOSABI_LINUX, ELFOSABI_AIX, |
244bc108 KB |
259 | etc. */ |
260 | CORE_ADDR (*sigcontext_register_address) (CORE_ADDR, int); | |
261 | /* OS specific function which, given a frame address | |
262 | and register number, returns the offset to the | |
263 | given register from the start of the frame. */ | |
698cb3f0 | 264 | CORE_ADDR (*find_global_pointer) (CORE_ADDR); |
244bc108 KB |
265 | }; |
266 | ||
698cb3f0 KB |
267 | #define SIGCONTEXT_REGISTER_ADDRESS \ |
268 | (gdbarch_tdep (current_gdbarch)->sigcontext_register_address) | |
269 | #define FIND_GLOBAL_POINTER \ | |
270 | (gdbarch_tdep (current_gdbarch)->find_global_pointer) | |
16461d7d | 271 | |
004d836a JJ |
272 | int |
273 | ia64_register_reggroup_p (struct gdbarch *gdbarch, int regnum, | |
274 | struct reggroup *group) | |
16461d7d | 275 | { |
004d836a JJ |
276 | int vector_p; |
277 | int float_p; | |
278 | int raw_p; | |
279 | if (group == all_reggroup) | |
280 | return 1; | |
281 | vector_p = TYPE_VECTOR (register_type (gdbarch, regnum)); | |
282 | float_p = TYPE_CODE (register_type (gdbarch, regnum)) == TYPE_CODE_FLT; | |
283 | raw_p = regnum < NUM_IA64_RAW_REGS; | |
284 | if (group == float_reggroup) | |
285 | return float_p; | |
286 | if (group == vector_reggroup) | |
287 | return vector_p; | |
288 | if (group == general_reggroup) | |
289 | return (!vector_p && !float_p); | |
290 | if (group == save_reggroup || group == restore_reggroup) | |
291 | return raw_p; | |
292 | return 0; | |
16461d7d KB |
293 | } |
294 | ||
004d836a JJ |
295 | static const char * |
296 | ia64_register_name (int reg) | |
16461d7d | 297 | { |
004d836a | 298 | return ia64_register_names[reg]; |
16461d7d KB |
299 | } |
300 | ||
004d836a JJ |
301 | struct type * |
302 | ia64_register_type (struct gdbarch *arch, int reg) | |
16461d7d | 303 | { |
004d836a JJ |
304 | if (reg >= IA64_FR0_REGNUM && reg <= IA64_FR127_REGNUM) |
305 | return builtin_type_ia64_ext; | |
306 | else | |
307 | return builtin_type_long; | |
16461d7d KB |
308 | } |
309 | ||
a78f21af | 310 | static int |
004d836a | 311 | ia64_dwarf_reg_to_regnum (int reg) |
16461d7d | 312 | { |
004d836a JJ |
313 | if (reg >= IA64_GR32_REGNUM && reg <= IA64_GR127_REGNUM) |
314 | return V32_REGNUM + (reg - IA64_GR32_REGNUM); | |
315 | return reg; | |
16461d7d KB |
316 | } |
317 | ||
318 | const struct floatformat floatformat_ia64_ext = | |
319 | { | |
320 | floatformat_little, 82, 0, 1, 17, 65535, 0x1ffff, 18, 64, | |
321 | floatformat_intbit_yes | |
322 | }; | |
323 | ||
16461d7d | 324 | |
244bc108 KB |
325 | /* Read the given register from a sigcontext structure in the |
326 | specified frame. */ | |
327 | ||
328 | static CORE_ADDR | |
329 | read_sigcontext_register (struct frame_info *frame, int regnum) | |
330 | { | |
331 | CORE_ADDR regaddr; | |
332 | ||
333 | if (frame == NULL) | |
8e65ff28 AC |
334 | internal_error (__FILE__, __LINE__, |
335 | "read_sigcontext_register: NULL frame"); | |
5a203e44 | 336 | if (!(get_frame_type (frame) == SIGTRAMP_FRAME)) |
8e65ff28 | 337 | internal_error (__FILE__, __LINE__, |
5a203e44 | 338 | "read_sigcontext_register: frame not a signal trampoline"); |
244bc108 | 339 | if (SIGCONTEXT_REGISTER_ADDRESS == 0) |
8e65ff28 AC |
340 | internal_error (__FILE__, __LINE__, |
341 | "read_sigcontext_register: SIGCONTEXT_REGISTER_ADDRESS is 0"); | |
244bc108 | 342 | |
1e2330ba | 343 | regaddr = SIGCONTEXT_REGISTER_ADDRESS (get_frame_base (frame), regnum); |
244bc108 KB |
344 | if (regaddr) |
345 | return read_memory_integer (regaddr, REGISTER_RAW_SIZE (regnum)); | |
346 | else | |
8e65ff28 AC |
347 | internal_error (__FILE__, __LINE__, |
348 | "read_sigcontext_register: Register %d not in struct sigcontext", regnum); | |
244bc108 KB |
349 | } |
350 | ||
16461d7d KB |
351 | /* Extract ``len'' bits from an instruction bundle starting at |
352 | bit ``from''. */ | |
353 | ||
244bc108 | 354 | static long long |
16461d7d KB |
355 | extract_bit_field (char *bundle, int from, int len) |
356 | { | |
357 | long long result = 0LL; | |
358 | int to = from + len; | |
359 | int from_byte = from / 8; | |
360 | int to_byte = to / 8; | |
361 | unsigned char *b = (unsigned char *) bundle; | |
362 | unsigned char c; | |
363 | int lshift; | |
364 | int i; | |
365 | ||
366 | c = b[from_byte]; | |
367 | if (from_byte == to_byte) | |
368 | c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8); | |
369 | result = c >> (from % 8); | |
370 | lshift = 8 - (from % 8); | |
371 | ||
372 | for (i = from_byte+1; i < to_byte; i++) | |
373 | { | |
374 | result |= ((long long) b[i]) << lshift; | |
375 | lshift += 8; | |
376 | } | |
377 | ||
378 | if (from_byte < to_byte && (to % 8 != 0)) | |
379 | { | |
380 | c = b[to_byte]; | |
381 | c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8); | |
382 | result |= ((long long) c) << lshift; | |
383 | } | |
384 | ||
385 | return result; | |
386 | } | |
387 | ||
388 | /* Replace the specified bits in an instruction bundle */ | |
389 | ||
244bc108 | 390 | static void |
16461d7d KB |
391 | replace_bit_field (char *bundle, long long val, int from, int len) |
392 | { | |
393 | int to = from + len; | |
394 | int from_byte = from / 8; | |
395 | int to_byte = to / 8; | |
396 | unsigned char *b = (unsigned char *) bundle; | |
397 | unsigned char c; | |
398 | ||
399 | if (from_byte == to_byte) | |
400 | { | |
401 | unsigned char left, right; | |
402 | c = b[from_byte]; | |
403 | left = (c >> (to % 8)) << (to % 8); | |
404 | right = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8); | |
405 | c = (unsigned char) (val & 0xff); | |
406 | c = (unsigned char) (c << (from % 8 + 8 - to % 8)) >> (8 - to % 8); | |
407 | c |= right | left; | |
408 | b[from_byte] = c; | |
409 | } | |
410 | else | |
411 | { | |
412 | int i; | |
413 | c = b[from_byte]; | |
414 | c = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8); | |
415 | c = c | (val << (from % 8)); | |
416 | b[from_byte] = c; | |
417 | val >>= 8 - from % 8; | |
418 | ||
419 | for (i = from_byte+1; i < to_byte; i++) | |
420 | { | |
421 | c = val & 0xff; | |
422 | val >>= 8; | |
423 | b[i] = c; | |
424 | } | |
425 | ||
426 | if (to % 8 != 0) | |
427 | { | |
428 | unsigned char cv = (unsigned char) val; | |
429 | c = b[to_byte]; | |
430 | c = c >> (to % 8) << (to % 8); | |
431 | c |= ((unsigned char) (cv << (8 - to % 8))) >> (8 - to % 8); | |
432 | b[to_byte] = c; | |
433 | } | |
434 | } | |
435 | } | |
436 | ||
437 | /* Return the contents of slot N (for N = 0, 1, or 2) in | |
438 | and instruction bundle */ | |
439 | ||
244bc108 | 440 | static long long |
2fc3ac7e | 441 | slotN_contents (char *bundle, int slotnum) |
16461d7d KB |
442 | { |
443 | return extract_bit_field (bundle, 5+41*slotnum, 41); | |
444 | } | |
445 | ||
446 | /* Store an instruction in an instruction bundle */ | |
447 | ||
244bc108 | 448 | static void |
2fc3ac7e | 449 | replace_slotN_contents (char *bundle, long long instr, int slotnum) |
16461d7d KB |
450 | { |
451 | replace_bit_field (bundle, instr, 5+41*slotnum, 41); | |
452 | } | |
453 | ||
64a5b29c | 454 | static enum instruction_type template_encoding_table[32][3] = |
16461d7d KB |
455 | { |
456 | { M, I, I }, /* 00 */ | |
457 | { M, I, I }, /* 01 */ | |
458 | { M, I, I }, /* 02 */ | |
459 | { M, I, I }, /* 03 */ | |
460 | { M, L, X }, /* 04 */ | |
461 | { M, L, X }, /* 05 */ | |
462 | { undefined, undefined, undefined }, /* 06 */ | |
463 | { undefined, undefined, undefined }, /* 07 */ | |
464 | { M, M, I }, /* 08 */ | |
465 | { M, M, I }, /* 09 */ | |
466 | { M, M, I }, /* 0A */ | |
467 | { M, M, I }, /* 0B */ | |
468 | { M, F, I }, /* 0C */ | |
469 | { M, F, I }, /* 0D */ | |
470 | { M, M, F }, /* 0E */ | |
471 | { M, M, F }, /* 0F */ | |
472 | { M, I, B }, /* 10 */ | |
473 | { M, I, B }, /* 11 */ | |
474 | { M, B, B }, /* 12 */ | |
475 | { M, B, B }, /* 13 */ | |
476 | { undefined, undefined, undefined }, /* 14 */ | |
477 | { undefined, undefined, undefined }, /* 15 */ | |
478 | { B, B, B }, /* 16 */ | |
479 | { B, B, B }, /* 17 */ | |
480 | { M, M, B }, /* 18 */ | |
481 | { M, M, B }, /* 19 */ | |
482 | { undefined, undefined, undefined }, /* 1A */ | |
483 | { undefined, undefined, undefined }, /* 1B */ | |
484 | { M, F, B }, /* 1C */ | |
485 | { M, F, B }, /* 1D */ | |
486 | { undefined, undefined, undefined }, /* 1E */ | |
487 | { undefined, undefined, undefined }, /* 1F */ | |
488 | }; | |
489 | ||
490 | /* Fetch and (partially) decode an instruction at ADDR and return the | |
491 | address of the next instruction to fetch. */ | |
492 | ||
493 | static CORE_ADDR | |
494 | fetch_instruction (CORE_ADDR addr, instruction_type *it, long long *instr) | |
495 | { | |
496 | char bundle[BUNDLE_LEN]; | |
497 | int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER; | |
498 | long long template; | |
499 | int val; | |
500 | ||
c26e1c2b KB |
501 | /* Warn about slot numbers greater than 2. We used to generate |
502 | an error here on the assumption that the user entered an invalid | |
503 | address. But, sometimes GDB itself requests an invalid address. | |
504 | This can (easily) happen when execution stops in a function for | |
505 | which there are no symbols. The prologue scanner will attempt to | |
506 | find the beginning of the function - if the nearest symbol | |
507 | happens to not be aligned on a bundle boundary (16 bytes), the | |
508 | resulting starting address will cause GDB to think that the slot | |
509 | number is too large. | |
510 | ||
511 | So we warn about it and set the slot number to zero. It is | |
512 | not necessarily a fatal condition, particularly if debugging | |
513 | at the assembly language level. */ | |
16461d7d | 514 | if (slotnum > 2) |
c26e1c2b KB |
515 | { |
516 | warning ("Can't fetch instructions for slot numbers greater than 2.\n" | |
517 | "Using slot 0 instead"); | |
518 | slotnum = 0; | |
519 | } | |
16461d7d KB |
520 | |
521 | addr &= ~0x0f; | |
522 | ||
523 | val = target_read_memory (addr, bundle, BUNDLE_LEN); | |
524 | ||
525 | if (val != 0) | |
526 | return 0; | |
527 | ||
528 | *instr = slotN_contents (bundle, slotnum); | |
529 | template = extract_bit_field (bundle, 0, 5); | |
530 | *it = template_encoding_table[(int)template][slotnum]; | |
531 | ||
64a5b29c | 532 | if (slotnum == 2 || (slotnum == 1 && *it == L)) |
16461d7d KB |
533 | addr += 16; |
534 | else | |
535 | addr += (slotnum + 1) * SLOT_MULTIPLIER; | |
536 | ||
537 | return addr; | |
538 | } | |
539 | ||
540 | /* There are 5 different break instructions (break.i, break.b, | |
541 | break.m, break.f, and break.x), but they all have the same | |
542 | encoding. (The five bit template in the low five bits of the | |
543 | instruction bundle distinguishes one from another.) | |
544 | ||
545 | The runtime architecture manual specifies that break instructions | |
546 | used for debugging purposes must have the upper two bits of the 21 | |
547 | bit immediate set to a 0 and a 1 respectively. A breakpoint | |
548 | instruction encodes the most significant bit of its 21 bit | |
549 | immediate at bit 36 of the 41 bit instruction. The penultimate msb | |
550 | is at bit 25 which leads to the pattern below. | |
551 | ||
552 | Originally, I had this set up to do, e.g, a "break.i 0x80000" But | |
553 | it turns out that 0x80000 was used as the syscall break in the early | |
554 | simulators. So I changed the pattern slightly to do "break.i 0x080001" | |
555 | instead. But that didn't work either (I later found out that this | |
556 | pattern was used by the simulator that I was using.) So I ended up | |
557 | using the pattern seen below. */ | |
558 | ||
559 | #if 0 | |
aaab4dba | 560 | #define IA64_BREAKPOINT 0x00002000040LL |
16461d7d | 561 | #endif |
aaab4dba | 562 | #define IA64_BREAKPOINT 0x00003333300LL |
16461d7d KB |
563 | |
564 | static int | |
565 | ia64_memory_insert_breakpoint (CORE_ADDR addr, char *contents_cache) | |
566 | { | |
567 | char bundle[BUNDLE_LEN]; | |
568 | int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER; | |
569 | long long instr; | |
570 | int val; | |
126fa72d | 571 | int template; |
16461d7d KB |
572 | |
573 | if (slotnum > 2) | |
574 | error("Can't insert breakpoint for slot numbers greater than 2."); | |
575 | ||
576 | addr &= ~0x0f; | |
577 | ||
578 | val = target_read_memory (addr, bundle, BUNDLE_LEN); | |
126fa72d PS |
579 | |
580 | /* Check for L type instruction in 2nd slot, if present then | |
581 | bump up the slot number to the 3rd slot */ | |
582 | template = extract_bit_field (bundle, 0, 5); | |
583 | if (slotnum == 1 && template_encoding_table[template][1] == L) | |
584 | { | |
585 | slotnum = 2; | |
586 | } | |
587 | ||
16461d7d KB |
588 | instr = slotN_contents (bundle, slotnum); |
589 | memcpy(contents_cache, &instr, sizeof(instr)); | |
aaab4dba | 590 | replace_slotN_contents (bundle, IA64_BREAKPOINT, slotnum); |
16461d7d KB |
591 | if (val == 0) |
592 | target_write_memory (addr, bundle, BUNDLE_LEN); | |
593 | ||
594 | return val; | |
595 | } | |
596 | ||
597 | static int | |
598 | ia64_memory_remove_breakpoint (CORE_ADDR addr, char *contents_cache) | |
599 | { | |
600 | char bundle[BUNDLE_LEN]; | |
601 | int slotnum = (addr & 0x0f) / SLOT_MULTIPLIER; | |
602 | long long instr; | |
603 | int val; | |
126fa72d | 604 | int template; |
16461d7d KB |
605 | |
606 | addr &= ~0x0f; | |
607 | ||
608 | val = target_read_memory (addr, bundle, BUNDLE_LEN); | |
126fa72d PS |
609 | |
610 | /* Check for L type instruction in 2nd slot, if present then | |
611 | bump up the slot number to the 3rd slot */ | |
612 | template = extract_bit_field (bundle, 0, 5); | |
613 | if (slotnum == 1 && template_encoding_table[template][1] == L) | |
614 | { | |
615 | slotnum = 2; | |
616 | } | |
617 | ||
16461d7d KB |
618 | memcpy (&instr, contents_cache, sizeof instr); |
619 | replace_slotN_contents (bundle, instr, slotnum); | |
620 | if (val == 0) | |
621 | target_write_memory (addr, bundle, BUNDLE_LEN); | |
622 | ||
623 | return val; | |
624 | } | |
625 | ||
626 | /* We don't really want to use this, but remote.c needs to call it in order | |
627 | to figure out if Z-packets are supported or not. Oh, well. */ | |
f4f9705a | 628 | const unsigned char * |
fba45db2 | 629 | ia64_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) |
16461d7d KB |
630 | { |
631 | static unsigned char breakpoint[] = | |
632 | { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; | |
633 | *lenptr = sizeof (breakpoint); | |
634 | #if 0 | |
635 | *pcptr &= ~0x0f; | |
636 | #endif | |
637 | return breakpoint; | |
638 | } | |
639 | ||
bd1ce8ba AC |
640 | static CORE_ADDR |
641 | ia64_read_fp (void) | |
642 | { | |
643 | /* We won't necessarily have a frame pointer and even if we do, it | |
644 | winds up being extraordinarly messy when attempting to find the | |
645 | frame chain. So for the purposes of creating frames (which is | |
646 | all deprecated_read_fp() is used for), simply use the stack | |
647 | pointer value instead. */ | |
648 | gdb_assert (SP_REGNUM >= 0); | |
649 | return read_register (SP_REGNUM); | |
650 | } | |
651 | ||
a78f21af | 652 | static CORE_ADDR |
39f77062 | 653 | ia64_read_pc (ptid_t ptid) |
16461d7d | 654 | { |
39f77062 KB |
655 | CORE_ADDR psr_value = read_register_pid (IA64_PSR_REGNUM, ptid); |
656 | CORE_ADDR pc_value = read_register_pid (IA64_IP_REGNUM, ptid); | |
16461d7d KB |
657 | int slot_num = (psr_value >> 41) & 3; |
658 | ||
659 | return pc_value | (slot_num * SLOT_MULTIPLIER); | |
660 | } | |
661 | ||
a78f21af | 662 | static void |
39f77062 | 663 | ia64_write_pc (CORE_ADDR new_pc, ptid_t ptid) |
16461d7d KB |
664 | { |
665 | int slot_num = (int) (new_pc & 0xf) / SLOT_MULTIPLIER; | |
39f77062 | 666 | CORE_ADDR psr_value = read_register_pid (IA64_PSR_REGNUM, ptid); |
16461d7d KB |
667 | psr_value &= ~(3LL << 41); |
668 | psr_value |= (CORE_ADDR)(slot_num & 0x3) << 41; | |
669 | ||
670 | new_pc &= ~0xfLL; | |
671 | ||
39f77062 KB |
672 | write_register_pid (IA64_PSR_REGNUM, psr_value, ptid); |
673 | write_register_pid (IA64_IP_REGNUM, new_pc, ptid); | |
16461d7d KB |
674 | } |
675 | ||
676 | #define IS_NaT_COLLECTION_ADDR(addr) ((((addr) >> 3) & 0x3f) == 0x3f) | |
677 | ||
678 | /* Returns the address of the slot that's NSLOTS slots away from | |
679 | the address ADDR. NSLOTS may be positive or negative. */ | |
680 | static CORE_ADDR | |
681 | rse_address_add(CORE_ADDR addr, int nslots) | |
682 | { | |
683 | CORE_ADDR new_addr; | |
684 | int mandatory_nat_slots = nslots / 63; | |
685 | int direction = nslots < 0 ? -1 : 1; | |
686 | ||
687 | new_addr = addr + 8 * (nslots + mandatory_nat_slots); | |
688 | ||
689 | if ((new_addr >> 9) != ((addr + 8 * 64 * mandatory_nat_slots) >> 9)) | |
690 | new_addr += 8 * direction; | |
691 | ||
692 | if (IS_NaT_COLLECTION_ADDR(new_addr)) | |
693 | new_addr += 8 * direction; | |
694 | ||
695 | return new_addr; | |
696 | } | |
697 | ||
004d836a JJ |
698 | static void |
699 | ia64_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache, | |
700 | int regnum, void *buf) | |
16461d7d | 701 | { |
004d836a | 702 | if (regnum >= V32_REGNUM && regnum <= V127_REGNUM) |
244bc108 | 703 | { |
004d836a JJ |
704 | ULONGEST bsp; |
705 | ULONGEST cfm; | |
706 | CORE_ADDR reg; | |
707 | regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp); | |
708 | regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm); | |
709 | ||
710 | /* The bsp points at the end of the register frame so we | |
711 | subtract the size of frame from it to get start of register frame. */ | |
712 | bsp = rse_address_add (bsp, -(cfm & 0x7f)); | |
713 | ||
714 | if ((cfm & 0x7f) > regnum - V32_REGNUM) | |
715 | { | |
716 | ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM)); | |
717 | reg = read_memory_integer ((CORE_ADDR)reg_addr, 8); | |
718 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (regnum), reg); | |
719 | } | |
244bc108 | 720 | else |
004d836a JJ |
721 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (regnum), 0); |
722 | } | |
723 | else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM) | |
724 | { | |
725 | ULONGEST unatN_val; | |
726 | ULONGEST unat; | |
727 | regcache_cooked_read_unsigned (regcache, IA64_UNAT_REGNUM, &unat); | |
728 | unatN_val = (unat & (1LL << (regnum - IA64_NAT0_REGNUM))) != 0; | |
729 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (regnum), unatN_val); | |
730 | } | |
731 | else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM) | |
732 | { | |
733 | ULONGEST natN_val = 0; | |
734 | ULONGEST bsp; | |
735 | ULONGEST cfm; | |
736 | CORE_ADDR gr_addr = 0; | |
737 | regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp); | |
738 | regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm); | |
739 | ||
740 | /* The bsp points at the end of the register frame so we | |
741 | subtract the size of frame from it to get start of register frame. */ | |
742 | bsp = rse_address_add (bsp, -(cfm & 0x7f)); | |
743 | ||
744 | if ((cfm & 0x7f) > regnum - V32_REGNUM) | |
745 | gr_addr = rse_address_add (bsp, (regnum - V32_REGNUM)); | |
746 | ||
747 | if (gr_addr != 0) | |
748 | { | |
749 | /* Compute address of nat collection bits. */ | |
750 | CORE_ADDR nat_addr = gr_addr | 0x1f8; | |
751 | CORE_ADDR nat_collection; | |
752 | int nat_bit; | |
753 | /* If our nat collection address is bigger than bsp, we have to get | |
754 | the nat collection from rnat. Otherwise, we fetch the nat | |
755 | collection from the computed address. */ | |
756 | if (nat_addr >= bsp) | |
757 | regcache_cooked_read_unsigned (regcache, IA64_RNAT_REGNUM, &nat_collection); | |
758 | else | |
759 | nat_collection = read_memory_integer (nat_addr, 8); | |
760 | nat_bit = (gr_addr >> 3) & 0x3f; | |
761 | natN_val = (nat_collection >> nat_bit) & 1; | |
762 | } | |
763 | ||
764 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (regnum), natN_val); | |
244bc108 | 765 | } |
004d836a JJ |
766 | else if (regnum == VBOF_REGNUM) |
767 | { | |
768 | /* A virtual register frame start is provided for user convenience. | |
769 | It can be calculated as the bsp - sof (sizeof frame). */ | |
770 | ULONGEST bsp, vbsp; | |
771 | ULONGEST cfm; | |
772 | CORE_ADDR reg; | |
773 | regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp); | |
774 | regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm); | |
775 | ||
776 | /* The bsp points at the end of the register frame so we | |
777 | subtract the size of frame from it to get beginning of frame. */ | |
778 | vbsp = rse_address_add (bsp, -(cfm & 0x7f)); | |
779 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (regnum), vbsp); | |
780 | } | |
781 | else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM) | |
782 | { | |
783 | ULONGEST pr; | |
784 | ULONGEST cfm; | |
785 | ULONGEST prN_val; | |
786 | CORE_ADDR reg; | |
787 | regcache_cooked_read_unsigned (regcache, IA64_PR_REGNUM, &pr); | |
788 | regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm); | |
789 | ||
790 | if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM) | |
791 | { | |
792 | /* Fetch predicate register rename base from current frame | |
793 | marker for this frame. */ | |
794 | int rrb_pr = (cfm >> 32) & 0x3f; | |
795 | ||
796 | /* Adjust the register number to account for register rotation. */ | |
797 | regnum = VP16_REGNUM | |
798 | + ((regnum - VP16_REGNUM) + rrb_pr) % 48; | |
799 | } | |
800 | prN_val = (pr & (1LL << (regnum - VP0_REGNUM))) != 0; | |
801 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (regnum), prN_val); | |
802 | } | |
803 | else | |
804 | memset (buf, 0, REGISTER_RAW_SIZE (regnum)); | |
16461d7d KB |
805 | } |
806 | ||
004d836a JJ |
807 | static void |
808 | ia64_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache, | |
809 | int regnum, const void *buf) | |
16461d7d | 810 | { |
004d836a | 811 | if (regnum >= V32_REGNUM && regnum <= V127_REGNUM) |
244bc108 | 812 | { |
004d836a JJ |
813 | ULONGEST bsp; |
814 | ULONGEST cfm; | |
815 | CORE_ADDR reg; | |
816 | regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp); | |
817 | regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm); | |
818 | ||
819 | bsp = rse_address_add (bsp, -(cfm & 0x7f)); | |
820 | ||
821 | if ((cfm & 0x7f) > regnum - V32_REGNUM) | |
822 | { | |
823 | ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM)); | |
824 | write_memory (reg_addr, (void *)buf, 8); | |
825 | } | |
826 | } | |
827 | else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM) | |
828 | { | |
829 | ULONGEST unatN_val, unat, unatN_mask; | |
830 | regcache_cooked_read_unsigned (regcache, IA64_UNAT_REGNUM, &unat); | |
831 | unatN_val = extract_unsigned_integer (buf, REGISTER_RAW_SIZE (regnum)); | |
832 | unatN_mask = (1LL << (regnum - IA64_NAT0_REGNUM)); | |
833 | if (unatN_val == 0) | |
834 | unat &= ~unatN_mask; | |
835 | else if (unatN_val == 1) | |
836 | unat |= unatN_mask; | |
837 | regcache_cooked_write_unsigned (regcache, IA64_UNAT_REGNUM, unat); | |
838 | } | |
839 | else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM) | |
840 | { | |
841 | ULONGEST natN_val; | |
842 | ULONGEST bsp; | |
843 | ULONGEST cfm; | |
844 | CORE_ADDR gr_addr = 0; | |
845 | regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp); | |
846 | regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm); | |
847 | ||
848 | /* The bsp points at the end of the register frame so we | |
849 | subtract the size of frame from it to get start of register frame. */ | |
850 | bsp = rse_address_add (bsp, -(cfm & 0x7f)); | |
851 | ||
852 | if ((cfm & 0x7f) > regnum - V32_REGNUM) | |
853 | gr_addr = rse_address_add (bsp, (regnum - V32_REGNUM)); | |
854 | ||
855 | natN_val = extract_unsigned_integer (buf, REGISTER_RAW_SIZE (regnum)); | |
856 | ||
857 | if (gr_addr != 0 && (natN_val == 0 || natN_val == 1)) | |
858 | { | |
859 | /* Compute address of nat collection bits. */ | |
860 | CORE_ADDR nat_addr = gr_addr | 0x1f8; | |
861 | CORE_ADDR nat_collection; | |
862 | int natN_bit = (gr_addr >> 3) & 0x3f; | |
863 | ULONGEST natN_mask = (1LL << natN_bit); | |
864 | /* If our nat collection address is bigger than bsp, we have to get | |
865 | the nat collection from rnat. Otherwise, we fetch the nat | |
866 | collection from the computed address. */ | |
867 | if (nat_addr >= bsp) | |
868 | { | |
869 | regcache_cooked_read_unsigned (regcache, IA64_RNAT_REGNUM, &nat_collection); | |
870 | if (natN_val) | |
871 | nat_collection |= natN_mask; | |
872 | else | |
873 | nat_collection &= ~natN_mask; | |
874 | regcache_cooked_write_unsigned (regcache, IA64_RNAT_REGNUM, nat_collection); | |
875 | } | |
876 | else | |
877 | { | |
878 | char nat_buf[8]; | |
879 | nat_collection = read_memory_integer (nat_addr, 8); | |
880 | if (natN_val) | |
881 | nat_collection |= natN_mask; | |
882 | else | |
883 | nat_collection &= ~natN_mask; | |
884 | store_unsigned_integer (nat_buf, REGISTER_RAW_SIZE (regnum), nat_collection); | |
885 | write_memory (nat_addr, nat_buf, 8); | |
886 | } | |
887 | } | |
888 | } | |
889 | else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM) | |
890 | { | |
891 | ULONGEST pr; | |
892 | ULONGEST cfm; | |
893 | ULONGEST prN_val; | |
894 | ULONGEST prN_mask; | |
895 | ||
896 | regcache_cooked_read_unsigned (regcache, IA64_PR_REGNUM, &pr); | |
897 | regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm); | |
898 | ||
899 | if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM) | |
900 | { | |
901 | /* Fetch predicate register rename base from current frame | |
902 | marker for this frame. */ | |
903 | int rrb_pr = (cfm >> 32) & 0x3f; | |
904 | ||
905 | /* Adjust the register number to account for register rotation. */ | |
906 | regnum = VP16_REGNUM | |
907 | + ((regnum - VP16_REGNUM) + rrb_pr) % 48; | |
908 | } | |
909 | prN_val = extract_unsigned_integer (buf, REGISTER_RAW_SIZE (regnum)); | |
910 | prN_mask = (1LL << (regnum - VP0_REGNUM)); | |
911 | if (prN_val == 0) | |
912 | pr &= ~prN_mask; | |
913 | else if (prN_val == 1) | |
914 | pr |= prN_mask; | |
915 | regcache_cooked_write_unsigned (regcache, IA64_PR_REGNUM, pr); | |
244bc108 | 916 | } |
16461d7d KB |
917 | } |
918 | ||
004d836a JJ |
919 | /* The ia64 needs to convert between various ieee floating-point formats |
920 | and the special ia64 floating point register format. */ | |
921 | ||
922 | static int | |
923 | ia64_convert_register_p (int regno, struct type *type) | |
924 | { | |
925 | return (regno >= IA64_FR0_REGNUM && regno <= IA64_FR127_REGNUM); | |
926 | } | |
927 | ||
928 | static void | |
929 | ia64_register_to_value (struct frame_info *frame, int regnum, | |
930 | struct type *valtype, void *out) | |
931 | { | |
932 | char in[MAX_REGISTER_SIZE]; | |
933 | frame_register_read (frame, regnum, in); | |
934 | convert_typed_floating (in, builtin_type_ia64_ext, out, valtype); | |
935 | } | |
936 | ||
937 | static void | |
938 | ia64_value_to_register (struct frame_info *frame, int regnum, | |
939 | struct type *valtype, const void *in) | |
940 | { | |
941 | char out[MAX_REGISTER_SIZE]; | |
942 | convert_typed_floating (in, valtype, out, builtin_type_ia64_ext); | |
943 | put_frame_register (frame, regnum, out); | |
944 | } | |
945 | ||
946 | ||
58ab00f9 KB |
947 | /* Limit the number of skipped non-prologue instructions since examining |
948 | of the prologue is expensive. */ | |
5ea2bd7f | 949 | static int max_skip_non_prologue_insns = 40; |
58ab00f9 KB |
950 | |
951 | /* Given PC representing the starting address of a function, and | |
952 | LIM_PC which is the (sloppy) limit to which to scan when looking | |
953 | for a prologue, attempt to further refine this limit by using | |
954 | the line data in the symbol table. If successful, a better guess | |
955 | on where the prologue ends is returned, otherwise the previous | |
956 | value of lim_pc is returned. TRUST_LIMIT is a pointer to a flag | |
957 | which will be set to indicate whether the returned limit may be | |
958 | used with no further scanning in the event that the function is | |
959 | frameless. */ | |
960 | ||
961 | static CORE_ADDR | |
962 | refine_prologue_limit (CORE_ADDR pc, CORE_ADDR lim_pc, int *trust_limit) | |
963 | { | |
964 | struct symtab_and_line prologue_sal; | |
965 | CORE_ADDR start_pc = pc; | |
966 | ||
967 | /* Start off not trusting the limit. */ | |
968 | *trust_limit = 0; | |
969 | ||
970 | prologue_sal = find_pc_line (pc, 0); | |
971 | if (prologue_sal.line != 0) | |
972 | { | |
973 | int i; | |
974 | CORE_ADDR addr = prologue_sal.end; | |
975 | ||
976 | /* Handle the case in which compiler's optimizer/scheduler | |
977 | has moved instructions into the prologue. We scan ahead | |
978 | in the function looking for address ranges whose corresponding | |
979 | line number is less than or equal to the first one that we | |
980 | found for the function. (It can be less than when the | |
981 | scheduler puts a body instruction before the first prologue | |
982 | instruction.) */ | |
983 | for (i = 2 * max_skip_non_prologue_insns; | |
984 | i > 0 && (lim_pc == 0 || addr < lim_pc); | |
985 | i--) | |
986 | { | |
987 | struct symtab_and_line sal; | |
988 | ||
989 | sal = find_pc_line (addr, 0); | |
990 | if (sal.line == 0) | |
991 | break; | |
992 | if (sal.line <= prologue_sal.line | |
993 | && sal.symtab == prologue_sal.symtab) | |
994 | { | |
995 | prologue_sal = sal; | |
996 | } | |
997 | addr = sal.end; | |
998 | } | |
999 | ||
1000 | if (lim_pc == 0 || prologue_sal.end < lim_pc) | |
1001 | { | |
1002 | lim_pc = prologue_sal.end; | |
1003 | if (start_pc == get_pc_function_start (lim_pc)) | |
1004 | *trust_limit = 1; | |
1005 | } | |
1006 | } | |
1007 | return lim_pc; | |
1008 | } | |
1009 | ||
16461d7d KB |
1010 | #define isScratch(_regnum_) ((_regnum_) == 2 || (_regnum_) == 3 \ |
1011 | || (8 <= (_regnum_) && (_regnum_) <= 11) \ | |
1012 | || (14 <= (_regnum_) && (_regnum_) <= 31)) | |
1013 | #define imm9(_instr_) \ | |
1014 | ( ((((_instr_) & 0x01000000000LL) ? -1 : 0) << 8) \ | |
1015 | | (((_instr_) & 0x00008000000LL) >> 20) \ | |
1016 | | (((_instr_) & 0x00000001fc0LL) >> 6)) | |
1017 | ||
004d836a JJ |
1018 | /* Allocate and initialize a frame cache. */ |
1019 | ||
1020 | static struct ia64_frame_cache * | |
1021 | ia64_alloc_frame_cache (void) | |
1022 | { | |
1023 | struct ia64_frame_cache *cache; | |
1024 | int i; | |
1025 | ||
1026 | cache = FRAME_OBSTACK_ZALLOC (struct ia64_frame_cache); | |
1027 | ||
1028 | /* Base address. */ | |
1029 | cache->base = 0; | |
1030 | cache->pc = 0; | |
1031 | cache->cfm = 0; | |
1032 | cache->sof = 0; | |
1033 | cache->sol = 0; | |
1034 | cache->sor = 0; | |
1035 | cache->bsp = 0; | |
1036 | cache->fp_reg = 0; | |
1037 | cache->frameless = 1; | |
1038 | ||
1039 | for (i = 0; i < NUM_IA64_RAW_REGS; i++) | |
1040 | cache->saved_regs[i] = 0; | |
1041 | ||
1042 | return cache; | |
1043 | } | |
1044 | ||
16461d7d | 1045 | static CORE_ADDR |
004d836a | 1046 | examine_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct frame_info *next_frame, struct ia64_frame_cache *cache) |
16461d7d KB |
1047 | { |
1048 | CORE_ADDR next_pc; | |
1049 | CORE_ADDR last_prologue_pc = pc; | |
16461d7d KB |
1050 | instruction_type it; |
1051 | long long instr; | |
16461d7d KB |
1052 | int cfm_reg = 0; |
1053 | int ret_reg = 0; | |
1054 | int fp_reg = 0; | |
1055 | int unat_save_reg = 0; | |
1056 | int pr_save_reg = 0; | |
1057 | int mem_stack_frame_size = 0; | |
1058 | int spill_reg = 0; | |
1059 | CORE_ADDR spill_addr = 0; | |
0927a22b KB |
1060 | char instores[8]; |
1061 | char infpstores[8]; | |
5ea2bd7f | 1062 | char reg_contents[256]; |
58ab00f9 | 1063 | int trust_limit; |
004d836a JJ |
1064 | int frameless = 1; |
1065 | int i; | |
1066 | CORE_ADDR addr; | |
1067 | char buf[8]; | |
1068 | CORE_ADDR bof, sor, sol, sof, cfm, rrb_gr; | |
0927a22b KB |
1069 | |
1070 | memset (instores, 0, sizeof instores); | |
1071 | memset (infpstores, 0, sizeof infpstores); | |
5ea2bd7f | 1072 | memset (reg_contents, 0, sizeof reg_contents); |
16461d7d | 1073 | |
004d836a JJ |
1074 | if (cache->after_prologue != 0 |
1075 | && cache->after_prologue <= lim_pc) | |
1076 | return cache->after_prologue; | |
16461d7d | 1077 | |
58ab00f9 | 1078 | lim_pc = refine_prologue_limit (pc, lim_pc, &trust_limit); |
16461d7d | 1079 | next_pc = fetch_instruction (pc, &it, &instr); |
5ea2bd7f JJ |
1080 | |
1081 | /* We want to check if we have a recognizable function start before we | |
1082 | look ahead for a prologue. */ | |
16461d7d KB |
1083 | if (pc < lim_pc && next_pc |
1084 | && it == M && ((instr & 0x1ee0000003fLL) == 0x02c00000000LL)) | |
1085 | { | |
5ea2bd7f | 1086 | /* alloc - start of a regular function. */ |
16461d7d KB |
1087 | int sor = (int) ((instr & 0x00078000000LL) >> 27); |
1088 | int sol = (int) ((instr & 0x00007f00000LL) >> 20); | |
1089 | int sof = (int) ((instr & 0x000000fe000LL) >> 13); | |
16461d7d | 1090 | int rN = (int) ((instr & 0x00000001fc0LL) >> 6); |
004d836a JJ |
1091 | |
1092 | /* Verify that the current cfm matches what we think is the | |
1093 | function start. If we have somehow jumped within a function, | |
1094 | we do not want to interpret the prologue and calculate the | |
1095 | addresses of various registers such as the return address. | |
1096 | We will instead treat the frame as frameless. */ | |
1097 | if (!next_frame || | |
1098 | (sof == (cache->cfm & 0x7f) && | |
1099 | sol == ((cache->cfm >> 7) & 0x7f))) | |
1100 | frameless = 0; | |
1101 | ||
16461d7d KB |
1102 | cfm_reg = rN; |
1103 | last_prologue_pc = next_pc; | |
1104 | pc = next_pc; | |
1105 | } | |
1106 | else | |
58ab00f9 | 1107 | { |
5ea2bd7f JJ |
1108 | /* Look for a leaf routine. */ |
1109 | if (pc < lim_pc && next_pc | |
1110 | && (it == I || it == M) | |
1111 | && ((instr & 0x1ee00000000LL) == 0x10800000000LL)) | |
1112 | { | |
1113 | /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */ | |
1114 | int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13) | |
1115 | | ((instr & 0x001f8000000LL) >> 20) | |
1116 | | ((instr & 0x000000fe000LL) >> 13)); | |
1117 | int rM = (int) ((instr & 0x00007f00000LL) >> 20); | |
1118 | int rN = (int) ((instr & 0x00000001fc0LL) >> 6); | |
1119 | int qp = (int) (instr & 0x0000000003fLL); | |
1120 | if (qp == 0 && rN == 2 && imm == 0 && rM == 12 && fp_reg == 0) | |
1121 | { | |
1122 | /* mov r2, r12 - beginning of leaf routine */ | |
1123 | fp_reg = rN; | |
5ea2bd7f JJ |
1124 | last_prologue_pc = next_pc; |
1125 | } | |
1126 | } | |
1127 | ||
1128 | /* If we don't recognize a regular function or leaf routine, we are | |
1129 | done. */ | |
1130 | if (!fp_reg) | |
1131 | { | |
1132 | pc = lim_pc; | |
1133 | if (trust_limit) | |
1134 | last_prologue_pc = lim_pc; | |
1135 | } | |
58ab00f9 | 1136 | } |
16461d7d KB |
1137 | |
1138 | /* Loop, looking for prologue instructions, keeping track of | |
1139 | where preserved registers were spilled. */ | |
1140 | while (pc < lim_pc) | |
1141 | { | |
1142 | next_pc = fetch_instruction (pc, &it, &instr); | |
1143 | if (next_pc == 0) | |
1144 | break; | |
1145 | ||
102d615a | 1146 | if (it == B && ((instr & 0x1e1f800003f) != 0x04000000000)) |
0927a22b | 1147 | { |
102d615a JJ |
1148 | /* Exit loop upon hitting a non-nop branch instruction. */ |
1149 | if (trust_limit) | |
1150 | lim_pc = pc; | |
1151 | break; | |
1152 | } | |
1153 | else if (((instr & 0x3fLL) != 0LL) && | |
1154 | (frameless || ret_reg != 0)) | |
1155 | { | |
1156 | /* Exit loop upon hitting a predicated instruction if | |
1157 | we already have the return register or if we are frameless. */ | |
5ea2bd7f JJ |
1158 | if (trust_limit) |
1159 | lim_pc = pc; | |
0927a22b KB |
1160 | break; |
1161 | } | |
1162 | else if (it == I && ((instr & 0x1eff8000000LL) == 0x00188000000LL)) | |
16461d7d KB |
1163 | { |
1164 | /* Move from BR */ | |
1165 | int b2 = (int) ((instr & 0x0000000e000LL) >> 13); | |
1166 | int rN = (int) ((instr & 0x00000001fc0LL) >> 6); | |
1167 | int qp = (int) (instr & 0x0000000003f); | |
1168 | ||
1169 | if (qp == 0 && b2 == 0 && rN >= 32 && ret_reg == 0) | |
1170 | { | |
1171 | ret_reg = rN; | |
1172 | last_prologue_pc = next_pc; | |
1173 | } | |
1174 | } | |
1175 | else if ((it == I || it == M) | |
1176 | && ((instr & 0x1ee00000000LL) == 0x10800000000LL)) | |
1177 | { | |
1178 | /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */ | |
1179 | int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13) | |
1180 | | ((instr & 0x001f8000000LL) >> 20) | |
1181 | | ((instr & 0x000000fe000LL) >> 13)); | |
1182 | int rM = (int) ((instr & 0x00007f00000LL) >> 20); | |
1183 | int rN = (int) ((instr & 0x00000001fc0LL) >> 6); | |
1184 | int qp = (int) (instr & 0x0000000003fLL); | |
1185 | ||
1186 | if (qp == 0 && rN >= 32 && imm == 0 && rM == 12 && fp_reg == 0) | |
1187 | { | |
1188 | /* mov rN, r12 */ | |
1189 | fp_reg = rN; | |
1190 | last_prologue_pc = next_pc; | |
1191 | } | |
1192 | else if (qp == 0 && rN == 12 && rM == 12) | |
1193 | { | |
1194 | /* adds r12, -mem_stack_frame_size, r12 */ | |
1195 | mem_stack_frame_size -= imm; | |
1196 | last_prologue_pc = next_pc; | |
1197 | } | |
1198 | else if (qp == 0 && rN == 2 | |
1199 | && ((rM == fp_reg && fp_reg != 0) || rM == 12)) | |
1200 | { | |
004d836a JJ |
1201 | char buf[MAX_REGISTER_SIZE]; |
1202 | CORE_ADDR saved_sp = 0; | |
16461d7d KB |
1203 | /* adds r2, spilloffset, rFramePointer |
1204 | or | |
1205 | adds r2, spilloffset, r12 | |
1206 | ||
1207 | Get ready for stf.spill or st8.spill instructions. | |
1208 | The address to start spilling at is loaded into r2. | |
1209 | FIXME: Why r2? That's what gcc currently uses; it | |
1210 | could well be different for other compilers. */ | |
1211 | ||
1212 | /* Hmm... whether or not this will work will depend on | |
1213 | where the pc is. If it's still early in the prologue | |
1214 | this'll be wrong. FIXME */ | |
004d836a JJ |
1215 | if (next_frame) |
1216 | { | |
1217 | frame_unwind_register (next_frame, sp_regnum, buf); | |
1218 | saved_sp = extract_unsigned_integer (buf, 8); | |
1219 | } | |
1220 | spill_addr = saved_sp | |
16461d7d KB |
1221 | + (rM == 12 ? 0 : mem_stack_frame_size) |
1222 | + imm; | |
1223 | spill_reg = rN; | |
1224 | last_prologue_pc = next_pc; | |
1225 | } | |
5ea2bd7f JJ |
1226 | else if (qp == 0 && rM >= 32 && rM < 40 && !instores[rM] && |
1227 | rN < 256 && imm == 0) | |
1228 | { | |
1229 | /* mov rN, rM where rM is an input register */ | |
1230 | reg_contents[rN] = rM; | |
1231 | last_prologue_pc = next_pc; | |
1232 | } | |
1233 | else if (frameless && qp == 0 && rN == fp_reg && imm == 0 && | |
1234 | rM == 2) | |
1235 | { | |
1236 | /* mov r12, r2 */ | |
1237 | last_prologue_pc = next_pc; | |
1238 | break; | |
1239 | } | |
16461d7d KB |
1240 | } |
1241 | else if (it == M | |
1242 | && ( ((instr & 0x1efc0000000LL) == 0x0eec0000000LL) | |
1243 | || ((instr & 0x1ffc8000000LL) == 0x0cec0000000LL) )) | |
1244 | { | |
1245 | /* stf.spill [rN] = fM, imm9 | |
1246 | or | |
1247 | stf.spill [rN] = fM */ | |
1248 | ||
1249 | int imm = imm9(instr); | |
1250 | int rN = (int) ((instr & 0x00007f00000LL) >> 20); | |
1251 | int fM = (int) ((instr & 0x000000fe000LL) >> 13); | |
1252 | int qp = (int) (instr & 0x0000000003fLL); | |
1253 | if (qp == 0 && rN == spill_reg && spill_addr != 0 | |
1254 | && ((2 <= fM && fM <= 5) || (16 <= fM && fM <= 31))) | |
1255 | { | |
004d836a | 1256 | cache->saved_regs[IA64_FR0_REGNUM + fM] = spill_addr; |
16461d7d KB |
1257 | |
1258 | if ((instr & 0x1efc0000000) == 0x0eec0000000) | |
1259 | spill_addr += imm; | |
1260 | else | |
1261 | spill_addr = 0; /* last one; must be done */ | |
1262 | last_prologue_pc = next_pc; | |
1263 | } | |
1264 | } | |
1265 | else if ((it == M && ((instr & 0x1eff8000000LL) == 0x02110000000LL)) | |
1266 | || (it == I && ((instr & 0x1eff8000000LL) == 0x00050000000LL)) ) | |
1267 | { | |
1268 | /* mov.m rN = arM | |
1269 | or | |
1270 | mov.i rN = arM */ | |
1271 | ||
1272 | int arM = (int) ((instr & 0x00007f00000LL) >> 20); | |
1273 | int rN = (int) ((instr & 0x00000001fc0LL) >> 6); | |
1274 | int qp = (int) (instr & 0x0000000003fLL); | |
1275 | if (qp == 0 && isScratch (rN) && arM == 36 /* ar.unat */) | |
1276 | { | |
1277 | /* We have something like "mov.m r3 = ar.unat". Remember the | |
1278 | r3 (or whatever) and watch for a store of this register... */ | |
1279 | unat_save_reg = rN; | |
1280 | last_prologue_pc = next_pc; | |
1281 | } | |
1282 | } | |
1283 | else if (it == I && ((instr & 0x1eff8000000LL) == 0x00198000000LL)) | |
1284 | { | |
1285 | /* mov rN = pr */ | |
1286 | int rN = (int) ((instr & 0x00000001fc0LL) >> 6); | |
1287 | int qp = (int) (instr & 0x0000000003fLL); | |
1288 | if (qp == 0 && isScratch (rN)) | |
1289 | { | |
1290 | pr_save_reg = rN; | |
1291 | last_prologue_pc = next_pc; | |
1292 | } | |
1293 | } | |
1294 | else if (it == M | |
1295 | && ( ((instr & 0x1ffc8000000LL) == 0x08cc0000000LL) | |
1296 | || ((instr & 0x1efc0000000LL) == 0x0acc0000000LL))) | |
1297 | { | |
1298 | /* st8 [rN] = rM | |
1299 | or | |
1300 | st8 [rN] = rM, imm9 */ | |
1301 | int rN = (int) ((instr & 0x00007f00000LL) >> 20); | |
1302 | int rM = (int) ((instr & 0x000000fe000LL) >> 13); | |
1303 | int qp = (int) (instr & 0x0000000003fLL); | |
5ea2bd7f | 1304 | int indirect = rM < 256 ? reg_contents[rM] : 0; |
16461d7d KB |
1305 | if (qp == 0 && rN == spill_reg && spill_addr != 0 |
1306 | && (rM == unat_save_reg || rM == pr_save_reg)) | |
1307 | { | |
1308 | /* We've found a spill of either the UNAT register or the PR | |
1309 | register. (Well, not exactly; what we've actually found is | |
1310 | a spill of the register that UNAT or PR was moved to). | |
1311 | Record that fact and move on... */ | |
1312 | if (rM == unat_save_reg) | |
1313 | { | |
1314 | /* Track UNAT register */ | |
004d836a | 1315 | cache->saved_regs[IA64_UNAT_REGNUM] = spill_addr; |
16461d7d KB |
1316 | unat_save_reg = 0; |
1317 | } | |
1318 | else | |
1319 | { | |
1320 | /* Track PR register */ | |
004d836a | 1321 | cache->saved_regs[IA64_PR_REGNUM] = spill_addr; |
16461d7d KB |
1322 | pr_save_reg = 0; |
1323 | } | |
1324 | if ((instr & 0x1efc0000000LL) == 0x0acc0000000LL) | |
1325 | /* st8 [rN] = rM, imm9 */ | |
1326 | spill_addr += imm9(instr); | |
1327 | else | |
1328 | spill_addr = 0; /* must be done spilling */ | |
1329 | last_prologue_pc = next_pc; | |
1330 | } | |
0927a22b KB |
1331 | else if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32]) |
1332 | { | |
1333 | /* Allow up to one store of each input register. */ | |
1334 | instores[rM-32] = 1; | |
1335 | last_prologue_pc = next_pc; | |
1336 | } | |
5ea2bd7f JJ |
1337 | else if (qp == 0 && 32 <= indirect && indirect < 40 && |
1338 | !instores[indirect-32]) | |
1339 | { | |
1340 | /* Allow an indirect store of an input register. */ | |
1341 | instores[indirect-32] = 1; | |
1342 | last_prologue_pc = next_pc; | |
1343 | } | |
0927a22b KB |
1344 | } |
1345 | else if (it == M && ((instr & 0x1ff08000000LL) == 0x08c00000000LL)) | |
1346 | { | |
1347 | /* One of | |
1348 | st1 [rN] = rM | |
1349 | st2 [rN] = rM | |
1350 | st4 [rN] = rM | |
1351 | st8 [rN] = rM | |
1352 | Note that the st8 case is handled in the clause above. | |
1353 | ||
1354 | Advance over stores of input registers. One store per input | |
1355 | register is permitted. */ | |
1356 | int rM = (int) ((instr & 0x000000fe000LL) >> 13); | |
1357 | int qp = (int) (instr & 0x0000000003fLL); | |
5ea2bd7f | 1358 | int indirect = rM < 256 ? reg_contents[rM] : 0; |
0927a22b KB |
1359 | if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32]) |
1360 | { | |
1361 | instores[rM-32] = 1; | |
1362 | last_prologue_pc = next_pc; | |
1363 | } | |
5ea2bd7f JJ |
1364 | else if (qp == 0 && 32 <= indirect && indirect < 40 && |
1365 | !instores[indirect-32]) | |
1366 | { | |
1367 | /* Allow an indirect store of an input register. */ | |
1368 | instores[indirect-32] = 1; | |
1369 | last_prologue_pc = next_pc; | |
1370 | } | |
0927a22b KB |
1371 | } |
1372 | else if (it == M && ((instr & 0x1ff88000000LL) == 0x0cc80000000LL)) | |
1373 | { | |
1374 | /* Either | |
1375 | stfs [rN] = fM | |
1376 | or | |
1377 | stfd [rN] = fM | |
1378 | ||
1379 | Advance over stores of floating point input registers. Again | |
1380 | one store per register is permitted */ | |
1381 | int fM = (int) ((instr & 0x000000fe000LL) >> 13); | |
1382 | int qp = (int) (instr & 0x0000000003fLL); | |
1383 | if (qp == 0 && 8 <= fM && fM < 16 && !infpstores[fM - 8]) | |
1384 | { | |
1385 | infpstores[fM-8] = 1; | |
1386 | last_prologue_pc = next_pc; | |
1387 | } | |
16461d7d KB |
1388 | } |
1389 | else if (it == M | |
1390 | && ( ((instr & 0x1ffc8000000LL) == 0x08ec0000000LL) | |
1391 | || ((instr & 0x1efc0000000LL) == 0x0aec0000000LL))) | |
1392 | { | |
1393 | /* st8.spill [rN] = rM | |
1394 | or | |
1395 | st8.spill [rN] = rM, imm9 */ | |
1396 | int rN = (int) ((instr & 0x00007f00000LL) >> 20); | |
1397 | int rM = (int) ((instr & 0x000000fe000LL) >> 13); | |
1398 | int qp = (int) (instr & 0x0000000003fLL); | |
1399 | if (qp == 0 && rN == spill_reg && 4 <= rM && rM <= 7) | |
1400 | { | |
1401 | /* We've found a spill of one of the preserved general purpose | |
1402 | regs. Record the spill address and advance the spill | |
1403 | register if appropriate. */ | |
004d836a | 1404 | cache->saved_regs[IA64_GR0_REGNUM + rM] = spill_addr; |
16461d7d KB |
1405 | if ((instr & 0x1efc0000000LL) == 0x0aec0000000LL) |
1406 | /* st8.spill [rN] = rM, imm9 */ | |
1407 | spill_addr += imm9(instr); | |
1408 | else | |
1409 | spill_addr = 0; /* Done spilling */ | |
1410 | last_prologue_pc = next_pc; | |
1411 | } | |
1412 | } | |
16461d7d KB |
1413 | |
1414 | pc = next_pc; | |
1415 | } | |
1416 | ||
004d836a JJ |
1417 | /* If not frameless and we aren't called by skip_prologue, then we need to calculate |
1418 | registers for the previous frame which will be needed later. */ | |
16461d7d | 1419 | |
004d836a | 1420 | if (!frameless && next_frame) |
da50a4b7 | 1421 | { |
004d836a JJ |
1422 | /* Extract the size of the rotating portion of the stack |
1423 | frame and the register rename base from the current | |
1424 | frame marker. */ | |
1425 | cfm = cache->cfm; | |
1426 | sor = cache->sor; | |
1427 | sof = cache->sof; | |
1428 | sol = cache->sol; | |
1429 | rrb_gr = (cfm >> 18) & 0x7f; | |
1430 | ||
1431 | /* Find the bof (beginning of frame). */ | |
1432 | bof = rse_address_add (cache->bsp, -sof); | |
1433 | ||
1434 | for (i = 0, addr = bof; | |
1435 | i < sof; | |
1436 | i++, addr += 8) | |
1437 | { | |
1438 | if (IS_NaT_COLLECTION_ADDR (addr)) | |
1439 | { | |
1440 | addr += 8; | |
1441 | } | |
1442 | if (i+32 == cfm_reg) | |
1443 | cache->saved_regs[IA64_CFM_REGNUM] = addr; | |
1444 | if (i+32 == ret_reg) | |
1445 | cache->saved_regs[IA64_VRAP_REGNUM] = addr; | |
1446 | if (i+32 == fp_reg) | |
1447 | cache->saved_regs[IA64_VFP_REGNUM] = addr; | |
1448 | } | |
16461d7d | 1449 | |
004d836a JJ |
1450 | /* For the previous argument registers we require the previous bof. |
1451 | If we can't find the previous cfm, then we can do nothing. */ | |
1452 | if (cache->saved_regs[IA64_CFM_REGNUM] != 0) | |
1453 | { | |
1454 | cfm = read_memory_integer (cache->saved_regs[IA64_CFM_REGNUM], 8); | |
1455 | sor = ((cfm >> 14) & 0xf) * 8; | |
1456 | sof = (cfm & 0x7f); | |
1457 | sol = (cfm >> 7) & 0x7f; | |
1458 | rrb_gr = (cfm >> 18) & 0x7f; | |
1459 | ||
1460 | /* The previous bof only requires subtraction of the sol (size of locals) | |
1461 | due to the overlap between output and input of subsequent frames. */ | |
1462 | bof = rse_address_add (bof, -sol); | |
1463 | ||
1464 | for (i = 0, addr = bof; | |
1465 | i < sof; | |
1466 | i++, addr += 8) | |
1467 | { | |
1468 | if (IS_NaT_COLLECTION_ADDR (addr)) | |
1469 | { | |
1470 | addr += 8; | |
1471 | } | |
1472 | if (i < sor) | |
1473 | cache->saved_regs[IA64_GR32_REGNUM + ((i + (sor - rrb_gr)) % sor)] | |
1474 | = addr; | |
1475 | else | |
1476 | cache->saved_regs[IA64_GR32_REGNUM + i] = addr; | |
1477 | } | |
1478 | ||
1479 | } | |
1480 | } | |
1481 | ||
5ea2bd7f JJ |
1482 | /* Try and trust the lim_pc value whenever possible. */ |
1483 | if (trust_limit && lim_pc >= last_prologue_pc) | |
004d836a JJ |
1484 | last_prologue_pc = lim_pc; |
1485 | ||
1486 | cache->frameless = frameless; | |
1487 | cache->after_prologue = last_prologue_pc; | |
1488 | cache->mem_stack_frame_size = mem_stack_frame_size; | |
1489 | cache->fp_reg = fp_reg; | |
5ea2bd7f | 1490 | |
16461d7d KB |
1491 | return last_prologue_pc; |
1492 | } | |
1493 | ||
1494 | CORE_ADDR | |
1495 | ia64_skip_prologue (CORE_ADDR pc) | |
1496 | { | |
004d836a JJ |
1497 | struct ia64_frame_cache cache; |
1498 | cache.base = 0; | |
1499 | cache.after_prologue = 0; | |
1500 | cache.cfm = 0; | |
1501 | cache.bsp = 0; | |
1502 | ||
1503 | /* Call examine_prologue with - as third argument since we don't have a next frame pointer to send. */ | |
1504 | return examine_prologue (pc, pc+1024, 0, &cache); | |
16461d7d KB |
1505 | } |
1506 | ||
004d836a JJ |
1507 | |
1508 | /* Normal frames. */ | |
1509 | ||
1510 | static struct ia64_frame_cache * | |
1511 | ia64_frame_cache (struct frame_info *next_frame, void **this_cache) | |
16461d7d | 1512 | { |
004d836a JJ |
1513 | struct ia64_frame_cache *cache; |
1514 | char buf[8]; | |
1515 | CORE_ADDR cfm, sof, sol, bsp, psr; | |
1516 | int i; | |
16461d7d | 1517 | |
004d836a JJ |
1518 | if (*this_cache) |
1519 | return *this_cache; | |
16461d7d | 1520 | |
004d836a JJ |
1521 | cache = ia64_alloc_frame_cache (); |
1522 | *this_cache = cache; | |
16461d7d | 1523 | |
004d836a JJ |
1524 | frame_unwind_register (next_frame, sp_regnum, buf); |
1525 | cache->saved_sp = extract_unsigned_integer (buf, 8); | |
16461d7d | 1526 | |
004d836a JJ |
1527 | /* We always want the bsp to point to the end of frame. |
1528 | This way, we can always get the beginning of frame (bof) | |
1529 | by subtracting frame size. */ | |
1530 | frame_unwind_register (next_frame, IA64_BSP_REGNUM, buf); | |
1531 | cache->bsp = extract_unsigned_integer (buf, 8); | |
1532 | ||
1533 | frame_unwind_register (next_frame, IA64_PSR_REGNUM, buf); | |
1534 | psr = extract_unsigned_integer (buf, 8); | |
1535 | ||
1536 | frame_unwind_register (next_frame, IA64_CFM_REGNUM, buf); | |
1537 | cfm = extract_unsigned_integer (buf, 8); | |
1538 | ||
1539 | cache->sof = (cfm & 0x7f); | |
1540 | cache->sol = (cfm >> 7) & 0x7f; | |
1541 | cache->sor = ((cfm >> 14) & 0xf) * 8; | |
1542 | ||
1543 | cache->cfm = cfm; | |
1544 | ||
1545 | cache->pc = frame_func_unwind (next_frame); | |
1546 | ||
1547 | if (cache->pc != 0) | |
1548 | examine_prologue (cache->pc, frame_pc_unwind (next_frame), next_frame, cache); | |
1549 | ||
1550 | cache->base = cache->saved_sp + cache->mem_stack_frame_size; | |
1551 | ||
1552 | return cache; | |
16461d7d KB |
1553 | } |
1554 | ||
a78f21af | 1555 | static void |
004d836a JJ |
1556 | ia64_frame_this_id (struct frame_info *next_frame, void **this_cache, |
1557 | struct frame_id *this_id) | |
16461d7d | 1558 | { |
004d836a JJ |
1559 | struct ia64_frame_cache *cache = |
1560 | ia64_frame_cache (next_frame, this_cache); | |
16461d7d | 1561 | |
004d836a JJ |
1562 | /* This marks the outermost frame. */ |
1563 | if (cache->base == 0) | |
1564 | return; | |
16461d7d | 1565 | |
004d836a JJ |
1566 | (*this_id) = frame_id_build (cache->base, cache->pc); |
1567 | } | |
244bc108 | 1568 | |
004d836a JJ |
1569 | static void |
1570 | ia64_frame_prev_register (struct frame_info *next_frame, void **this_cache, | |
1571 | int regnum, int *optimizedp, | |
1572 | enum lval_type *lvalp, CORE_ADDR *addrp, | |
1573 | int *realnump, void *valuep) | |
1574 | { | |
1575 | struct ia64_frame_cache *cache = | |
1576 | ia64_frame_cache (next_frame, this_cache); | |
1577 | char dummy_valp[MAX_REGISTER_SIZE]; | |
1578 | char buf[8]; | |
1579 | ||
1580 | gdb_assert (regnum >= 0); | |
244bc108 | 1581 | |
004d836a JJ |
1582 | if (!target_has_registers) |
1583 | error ("No registers."); | |
244bc108 | 1584 | |
004d836a JJ |
1585 | *optimizedp = 0; |
1586 | *addrp = 0; | |
1587 | *lvalp = not_lval; | |
1588 | *realnump = -1; | |
244bc108 | 1589 | |
004d836a JJ |
1590 | /* Rather than check each time if valuep is non-null, supply a dummy buffer |
1591 | when valuep is not supplied. */ | |
1592 | if (!valuep) | |
1593 | valuep = dummy_valp; | |
1594 | ||
1595 | memset (valuep, 0, REGISTER_RAW_SIZE (regnum)); | |
1596 | ||
1597 | if (regnum == SP_REGNUM) | |
16461d7d KB |
1598 | { |
1599 | /* Handle SP values for all frames but the topmost. */ | |
004d836a JJ |
1600 | store_unsigned_integer (valuep, REGISTER_RAW_SIZE (regnum), |
1601 | cache->base); | |
16461d7d KB |
1602 | } |
1603 | else if (regnum == IA64_BSP_REGNUM) | |
1604 | { | |
004d836a JJ |
1605 | char cfm_valuep[MAX_REGISTER_SIZE]; |
1606 | int cfm_optim; | |
1607 | int cfm_realnum; | |
1608 | enum lval_type cfm_lval; | |
1609 | CORE_ADDR cfm_addr; | |
1610 | CORE_ADDR bsp, prev_cfm, prev_bsp; | |
1611 | ||
1612 | /* We want to calculate the previous bsp as the end of the previous register stack frame. | |
1613 | This corresponds to what the hardware bsp register will be if we pop the frame | |
1614 | back which is why we might have been called. We know the beginning of the current | |
1615 | frame is cache->bsp - cache->sof. This value in the previous frame points to | |
1616 | the start of the output registers. We can calculate the end of that frame by adding | |
1617 | the size of output (sof (size of frame) - sol (size of locals)). */ | |
1618 | ia64_frame_prev_register (next_frame, this_cache, IA64_CFM_REGNUM, | |
1619 | &cfm_optim, &cfm_lval, &cfm_addr, &cfm_realnum, cfm_valuep); | |
1620 | prev_cfm = extract_unsigned_integer (cfm_valuep, 8); | |
1621 | ||
1622 | bsp = rse_address_add (cache->bsp, -(cache->sof)); | |
1623 | prev_bsp = rse_address_add (bsp, (prev_cfm & 0x7f) - ((prev_cfm >> 7) & 0x7f)); | |
1624 | ||
1625 | store_unsigned_integer (valuep, REGISTER_RAW_SIZE (regnum), | |
1626 | prev_bsp); | |
1627 | } | |
1628 | else if (regnum == IA64_CFM_REGNUM) | |
1629 | { | |
1630 | CORE_ADDR addr = 0; | |
1631 | ||
1632 | if (cache->frameless) | |
1633 | { | |
1634 | CORE_ADDR cfm = 0; | |
1635 | frame_unwind_register (next_frame, IA64_PFS_REGNUM, valuep); | |
1636 | } | |
1637 | else | |
1638 | { | |
1639 | addr = cache->saved_regs[IA64_CFM_REGNUM]; | |
1640 | if (addr != 0) | |
1641 | read_memory (addr, valuep, REGISTER_RAW_SIZE (regnum)); | |
1642 | } | |
16461d7d KB |
1643 | } |
1644 | else if (regnum == IA64_VFP_REGNUM) | |
1645 | { | |
1646 | /* If the function in question uses an automatic register (r32-r127) | |
1647 | for the frame pointer, it'll be found by ia64_find_saved_register() | |
1648 | above. If the function lacks one of these frame pointers, we can | |
004d836a JJ |
1649 | still provide a value since we know the size of the frame. */ |
1650 | CORE_ADDR vfp = cache->base; | |
1651 | store_unsigned_integer (valuep, REGISTER_RAW_SIZE (IA64_VFP_REGNUM), vfp); | |
16461d7d | 1652 | } |
004d836a | 1653 | else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM) |
16461d7d | 1654 | { |
004d836a | 1655 | char pr_valuep[MAX_REGISTER_SIZE]; |
16461d7d | 1656 | int pr_optim; |
004d836a | 1657 | int pr_realnum; |
16461d7d KB |
1658 | enum lval_type pr_lval; |
1659 | CORE_ADDR pr_addr; | |
004d836a JJ |
1660 | ULONGEST prN_val; |
1661 | ia64_frame_prev_register (next_frame, this_cache, IA64_PR_REGNUM, | |
1662 | &pr_optim, &pr_lval, &pr_addr, &pr_realnum, pr_valuep); | |
1663 | if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM) | |
3a854e23 KB |
1664 | { |
1665 | /* Fetch predicate register rename base from current frame | |
004d836a JJ |
1666 | marker for this frame. */ |
1667 | int rrb_pr = (cache->cfm >> 32) & 0x3f; | |
3a854e23 | 1668 | |
004d836a JJ |
1669 | /* Adjust the register number to account for register rotation. */ |
1670 | regnum = VP16_REGNUM | |
1671 | + ((regnum - VP16_REGNUM) + rrb_pr) % 48; | |
3a854e23 | 1672 | } |
004d836a JJ |
1673 | prN_val = extract_bit_field ((unsigned char *) pr_valuep, |
1674 | regnum - VP0_REGNUM, 1); | |
1675 | store_unsigned_integer (valuep, REGISTER_RAW_SIZE (regnum), prN_val); | |
16461d7d KB |
1676 | } |
1677 | else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM) | |
1678 | { | |
004d836a | 1679 | char unat_valuep[MAX_REGISTER_SIZE]; |
16461d7d | 1680 | int unat_optim; |
004d836a | 1681 | int unat_realnum; |
16461d7d KB |
1682 | enum lval_type unat_lval; |
1683 | CORE_ADDR unat_addr; | |
004d836a JJ |
1684 | ULONGEST unatN_val; |
1685 | ia64_frame_prev_register (next_frame, this_cache, IA64_UNAT_REGNUM, | |
1686 | &unat_optim, &unat_lval, &unat_addr, &unat_realnum, unat_valuep); | |
1687 | unatN_val = extract_bit_field ((unsigned char *) unat_valuep, | |
16461d7d | 1688 | regnum - IA64_NAT0_REGNUM, 1); |
004d836a | 1689 | store_unsigned_integer (valuep, REGISTER_RAW_SIZE (regnum), |
16461d7d | 1690 | unatN_val); |
16461d7d KB |
1691 | } |
1692 | else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM) | |
1693 | { | |
1694 | int natval = 0; | |
1695 | /* Find address of general register corresponding to nat bit we're | |
004d836a JJ |
1696 | interested in. */ |
1697 | CORE_ADDR gr_addr; | |
244bc108 | 1698 | |
004d836a JJ |
1699 | gr_addr = cache->saved_regs[regnum - IA64_NAT0_REGNUM |
1700 | + IA64_GR0_REGNUM]; | |
1701 | if (gr_addr != 0) | |
244bc108 | 1702 | { |
004d836a | 1703 | /* Compute address of nat collection bits. */ |
16461d7d | 1704 | CORE_ADDR nat_addr = gr_addr | 0x1f8; |
004d836a | 1705 | CORE_ADDR bsp; |
16461d7d KB |
1706 | CORE_ADDR nat_collection; |
1707 | int nat_bit; | |
1708 | /* If our nat collection address is bigger than bsp, we have to get | |
1709 | the nat collection from rnat. Otherwise, we fetch the nat | |
004d836a JJ |
1710 | collection from the computed address. */ |
1711 | frame_unwind_register (next_frame, IA64_BSP_REGNUM, buf); | |
1712 | bsp = extract_unsigned_integer (buf, 8); | |
16461d7d | 1713 | if (nat_addr >= bsp) |
004d836a JJ |
1714 | { |
1715 | frame_unwind_register (next_frame, IA64_RNAT_REGNUM, buf); | |
1716 | nat_collection = extract_unsigned_integer (buf, 8); | |
1717 | } | |
16461d7d KB |
1718 | else |
1719 | nat_collection = read_memory_integer (nat_addr, 8); | |
1720 | nat_bit = (gr_addr >> 3) & 0x3f; | |
1721 | natval = (nat_collection >> nat_bit) & 1; | |
1722 | } | |
004d836a JJ |
1723 | |
1724 | store_unsigned_integer (valuep, REGISTER_RAW_SIZE (regnum), natval); | |
244bc108 KB |
1725 | } |
1726 | else if (regnum == IA64_IP_REGNUM) | |
1727 | { | |
004d836a JJ |
1728 | CORE_ADDR pc = 0; |
1729 | ||
1730 | if (cache->frameless) | |
1731 | { | |
1732 | frame_unwind_register (next_frame, IA64_BR0_REGNUM, buf); | |
1733 | pc = extract_unsigned_integer (buf, 8); | |
1734 | } | |
244bc108 | 1735 | else |
004d836a JJ |
1736 | { |
1737 | CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM]; | |
1738 | if (addr != 0) | |
1739 | { | |
1740 | read_memory (addr, buf, REGISTER_RAW_SIZE (IA64_IP_REGNUM)); | |
1741 | pc = extract_unsigned_integer (buf, 8); | |
1742 | } | |
244bc108 | 1743 | } |
004d836a JJ |
1744 | pc &= ~0xf; |
1745 | store_unsigned_integer (valuep, 8, pc); | |
244bc108 | 1746 | } |
004d836a | 1747 | else if (regnum == IA64_PSR_REGNUM) |
244bc108 | 1748 | { |
004d836a JJ |
1749 | ULONGEST slot_num = 0; |
1750 | CORE_ADDR pc= 0; | |
1751 | CORE_ADDR psr = 0; | |
1752 | ||
1753 | frame_unwind_register (next_frame, IA64_PSR_REGNUM, buf); | |
1754 | psr = extract_unsigned_integer (buf, 8); | |
1755 | ||
1756 | if (cache->frameless) | |
244bc108 | 1757 | { |
004d836a JJ |
1758 | CORE_ADDR pc; |
1759 | frame_unwind_register (next_frame, IA64_BR0_REGNUM, buf); | |
1760 | pc = extract_unsigned_integer (buf, 8); | |
244bc108 | 1761 | } |
004d836a JJ |
1762 | else |
1763 | { | |
1764 | CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM]; | |
1765 | if (addr != 0) | |
1766 | { | |
1767 | read_memory (addr, buf, REGISTER_RAW_SIZE (IA64_IP_REGNUM)); | |
1768 | pc = extract_unsigned_integer (buf, 8); | |
1769 | } | |
1770 | } | |
1771 | psr &= ~(3LL << 41); | |
1772 | slot_num = pc & 0x3LL; | |
1773 | psr |= (CORE_ADDR)slot_num << 41; | |
1774 | store_unsigned_integer (valuep, 8, psr); | |
1775 | } | |
1776 | else if ((regnum >= IA64_GR32_REGNUM && regnum <= IA64_GR127_REGNUM) || | |
1777 | (regnum >= V32_REGNUM && regnum <= V127_REGNUM)) | |
1778 | { | |
1779 | CORE_ADDR addr = 0; | |
1780 | if (regnum >= V32_REGNUM) | |
1781 | regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM); | |
1782 | addr = cache->saved_regs[regnum]; | |
244bc108 KB |
1783 | if (addr != 0) |
1784 | { | |
004d836a JJ |
1785 | *lvalp = lval_memory; |
1786 | *addrp = addr; | |
1787 | read_memory (addr, valuep, REGISTER_RAW_SIZE (regnum)); | |
244bc108 | 1788 | } |
004d836a | 1789 | else if (cache->frameless) |
244bc108 | 1790 | { |
004d836a JJ |
1791 | char r_valuep[MAX_REGISTER_SIZE]; |
1792 | int r_optim; | |
1793 | int r_realnum; | |
1794 | enum lval_type r_lval; | |
1795 | CORE_ADDR r_addr; | |
1796 | CORE_ADDR prev_cfm, prev_bsp, prev_bof; | |
1797 | CORE_ADDR addr = 0; | |
1798 | if (regnum >= V32_REGNUM) | |
1799 | regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM); | |
1800 | ia64_frame_prev_register (next_frame, this_cache, IA64_CFM_REGNUM, | |
1801 | &r_optim, &r_lval, &r_addr, &r_realnum, r_valuep); | |
1802 | prev_cfm = extract_unsigned_integer (r_valuep, 8); | |
1803 | ia64_frame_prev_register (next_frame, this_cache, IA64_BSP_REGNUM, | |
1804 | &r_optim, &r_lval, &r_addr, &r_realnum, r_valuep); | |
1805 | prev_bsp = extract_unsigned_integer (r_valuep, 8); | |
1806 | prev_bof = rse_address_add (prev_bsp, -(prev_cfm & 0x7f)); | |
1807 | ||
1808 | addr = rse_address_add (prev_bof, (regnum - IA64_GR32_REGNUM)); | |
1809 | *lvalp = lval_memory; | |
1810 | *addrp = addr; | |
1811 | read_memory (addr, valuep, REGISTER_RAW_SIZE (regnum)); | |
244bc108 | 1812 | } |
16461d7d KB |
1813 | } |
1814 | else | |
1815 | { | |
004d836a | 1816 | CORE_ADDR addr = 0; |
3a854e23 KB |
1817 | if (IA64_FR32_REGNUM <= regnum && regnum <= IA64_FR127_REGNUM) |
1818 | { | |
1819 | /* Fetch floating point register rename base from current | |
004d836a JJ |
1820 | frame marker for this frame. */ |
1821 | int rrb_fr = (cache->cfm >> 25) & 0x7f; | |
3a854e23 KB |
1822 | |
1823 | /* Adjust the floating point register number to account for | |
004d836a | 1824 | register rotation. */ |
3a854e23 KB |
1825 | regnum = IA64_FR32_REGNUM |
1826 | + ((regnum - IA64_FR32_REGNUM) + rrb_fr) % 96; | |
1827 | } | |
1828 | ||
004d836a JJ |
1829 | /* If we have stored a memory address, access the register. */ |
1830 | addr = cache->saved_regs[regnum]; | |
1831 | if (addr != 0) | |
1832 | { | |
1833 | *lvalp = lval_memory; | |
1834 | *addrp = addr; | |
1835 | read_memory (addr, valuep, REGISTER_RAW_SIZE (regnum)); | |
1836 | } | |
1837 | /* Otherwise, punt and get the current value of the register. */ | |
1838 | else | |
1839 | frame_unwind_register (next_frame, regnum, valuep); | |
16461d7d | 1840 | } |
16461d7d | 1841 | } |
004d836a JJ |
1842 | |
1843 | static const struct frame_unwind ia64_frame_unwind = | |
1844 | { | |
1845 | NORMAL_FRAME, | |
1846 | &ia64_frame_this_id, | |
1847 | &ia64_frame_prev_register | |
1848 | }; | |
1849 | ||
1850 | static const struct frame_unwind * | |
1851 | ia64_frame_sniffer (struct frame_info *next_frame) | |
1852 | { | |
1853 | return &ia64_frame_unwind; | |
1854 | } | |
1855 | ||
1856 | /* Signal trampolines. */ | |
1857 | ||
1858 | static void | |
1859 | ia64_sigtramp_frame_init_saved_regs (struct ia64_frame_cache *cache) | |
1860 | { | |
1861 | if (SIGCONTEXT_REGISTER_ADDRESS) | |
1862 | { | |
1863 | int regno; | |
1864 | ||
1865 | cache->saved_regs[IA64_VRAP_REGNUM] = | |
1866 | SIGCONTEXT_REGISTER_ADDRESS (cache->base, IA64_IP_REGNUM); | |
1867 | cache->saved_regs[IA64_CFM_REGNUM] = | |
1868 | SIGCONTEXT_REGISTER_ADDRESS (cache->base, IA64_CFM_REGNUM); | |
1869 | cache->saved_regs[IA64_PSR_REGNUM] = | |
1870 | SIGCONTEXT_REGISTER_ADDRESS (cache->base, IA64_PSR_REGNUM); | |
1871 | #if 0 | |
1872 | cache->saved_regs[IA64_BSP_REGNUM] = | |
1873 | SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_BSP_REGNUM); | |
1874 | #endif | |
1875 | cache->saved_regs[IA64_RNAT_REGNUM] = | |
1876 | SIGCONTEXT_REGISTER_ADDRESS (cache->base, IA64_RNAT_REGNUM); | |
1877 | cache->saved_regs[IA64_CCV_REGNUM] = | |
1878 | SIGCONTEXT_REGISTER_ADDRESS (cache->base, IA64_CCV_REGNUM); | |
1879 | cache->saved_regs[IA64_UNAT_REGNUM] = | |
1880 | SIGCONTEXT_REGISTER_ADDRESS (cache->base, IA64_UNAT_REGNUM); | |
1881 | cache->saved_regs[IA64_FPSR_REGNUM] = | |
1882 | SIGCONTEXT_REGISTER_ADDRESS (cache->base, IA64_FPSR_REGNUM); | |
1883 | cache->saved_regs[IA64_PFS_REGNUM] = | |
1884 | SIGCONTEXT_REGISTER_ADDRESS (cache->base, IA64_PFS_REGNUM); | |
1885 | cache->saved_regs[IA64_LC_REGNUM] = | |
1886 | SIGCONTEXT_REGISTER_ADDRESS (cache->base, IA64_LC_REGNUM); | |
1887 | for (regno = IA64_GR1_REGNUM; regno <= IA64_GR31_REGNUM; regno++) | |
1888 | if (regno != sp_regnum) | |
1889 | cache->saved_regs[regno] = | |
1890 | SIGCONTEXT_REGISTER_ADDRESS (cache->base, regno); | |
1891 | for (regno = IA64_BR0_REGNUM; regno <= IA64_BR7_REGNUM; regno++) | |
1892 | cache->saved_regs[regno] = | |
1893 | SIGCONTEXT_REGISTER_ADDRESS (cache->base, regno); | |
1894 | for (regno = IA64_FR2_REGNUM; regno <= IA64_BR7_REGNUM; regno++) | |
1895 | cache->saved_regs[regno] = | |
1896 | SIGCONTEXT_REGISTER_ADDRESS (cache->base, regno); | |
1897 | } | |
1898 | } | |
1899 | ||
1900 | static struct ia64_frame_cache * | |
1901 | ia64_sigtramp_frame_cache (struct frame_info *next_frame, void **this_cache) | |
1902 | { | |
1903 | struct ia64_frame_cache *cache; | |
1904 | CORE_ADDR addr; | |
1905 | char buf[8]; | |
1906 | int i; | |
1907 | ||
1908 | if (*this_cache) | |
1909 | return *this_cache; | |
1910 | ||
1911 | cache = ia64_alloc_frame_cache (); | |
1912 | ||
1913 | frame_unwind_register (next_frame, sp_regnum, buf); | |
1914 | cache->base = extract_unsigned_integer (buf, 8) + cache->mem_stack_frame_size; | |
1915 | ||
1916 | ia64_sigtramp_frame_init_saved_regs (cache); | |
1917 | ||
1918 | *this_cache = cache; | |
1919 | return cache; | |
1920 | } | |
1921 | ||
1922 | static void | |
1923 | ia64_sigtramp_frame_this_id (struct frame_info *next_frame, | |
1924 | void **this_cache, struct frame_id *this_id) | |
1925 | { | |
1926 | struct ia64_frame_cache *cache = | |
1927 | ia64_sigtramp_frame_cache (next_frame, this_cache); | |
1928 | ||
1929 | (*this_id) = frame_id_build (cache->base, frame_pc_unwind (next_frame)); | |
1930 | } | |
1931 | ||
1932 | static void | |
1933 | ia64_sigtramp_frame_prev_register (struct frame_info *next_frame, | |
1934 | void **this_cache, | |
1935 | int regnum, int *optimizedp, | |
1936 | enum lval_type *lvalp, CORE_ADDR *addrp, | |
1937 | int *realnump, void *valuep) | |
1938 | { | |
1939 | /* Make sure we've initialized the cache. */ | |
1940 | ia64_sigtramp_frame_cache (next_frame, this_cache); | |
1941 | ||
1942 | ia64_frame_prev_register (next_frame, this_cache, regnum, | |
1943 | optimizedp, lvalp, addrp, realnump, valuep); | |
1944 | } | |
1945 | ||
1946 | static const struct frame_unwind ia64_sigtramp_frame_unwind = | |
1947 | { | |
1948 | SIGTRAMP_FRAME, | |
1949 | ia64_sigtramp_frame_this_id, | |
1950 | ia64_sigtramp_frame_prev_register | |
1951 | }; | |
1952 | ||
1953 | static const struct frame_unwind * | |
1954 | ia64_sigtramp_frame_sniffer (struct frame_info *next_frame) | |
1955 | { | |
1956 | char *name; | |
1957 | CORE_ADDR pc = frame_pc_unwind (next_frame); | |
1958 | ||
1959 | find_pc_partial_function (pc, &name, NULL, NULL); | |
1960 | if (PC_IN_SIGTRAMP (pc, name)) | |
1961 | return &ia64_sigtramp_frame_unwind; | |
1962 | ||
1963 | return NULL; | |
1964 | } | |
1965 | \f | |
1966 | ||
1967 | static CORE_ADDR | |
1968 | ia64_frame_base_address (struct frame_info *next_frame, void **this_cache) | |
1969 | { | |
1970 | struct ia64_frame_cache *cache = | |
1971 | ia64_frame_cache (next_frame, this_cache); | |
1972 | ||
1973 | return cache->base; | |
1974 | } | |
1975 | ||
1976 | static const struct frame_base ia64_frame_base = | |
1977 | { | |
1978 | &ia64_frame_unwind, | |
1979 | ia64_frame_base_address, | |
1980 | ia64_frame_base_address, | |
1981 | ia64_frame_base_address | |
1982 | }; | |
16461d7d KB |
1983 | |
1984 | /* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of | |
1985 | EXTRACT_RETURN_VALUE? GCC_P is true if compiled with gcc | |
1986 | and TYPE is the type (which is known to be struct, union or array). */ | |
1987 | int | |
1988 | ia64_use_struct_convention (int gcc_p, struct type *type) | |
1989 | { | |
64a5b29c KB |
1990 | struct type *float_elt_type; |
1991 | ||
1992 | /* HFAs are structures (or arrays) consisting entirely of floating | |
1993 | point values of the same length. Up to 8 of these are returned | |
1994 | in registers. Don't use the struct convention when this is the | |
004d836a | 1995 | case. */ |
64a5b29c KB |
1996 | float_elt_type = is_float_or_hfa_type (type); |
1997 | if (float_elt_type != NULL | |
1998 | && TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type) <= 8) | |
1999 | return 0; | |
2000 | ||
2001 | /* Other structs of length 32 or less are returned in r8-r11. | |
004d836a | 2002 | Don't use the struct convention for those either. */ |
16461d7d KB |
2003 | return TYPE_LENGTH (type) > 32; |
2004 | } | |
2005 | ||
2006 | void | |
004d836a | 2007 | ia64_extract_return_value (struct type *type, struct regcache *regcache, void *valbuf) |
16461d7d | 2008 | { |
64a5b29c KB |
2009 | struct type *float_elt_type; |
2010 | ||
2011 | float_elt_type = is_float_or_hfa_type (type); | |
2012 | if (float_elt_type != NULL) | |
2013 | { | |
004d836a | 2014 | char from[MAX_REGISTER_SIZE]; |
64a5b29c KB |
2015 | int offset = 0; |
2016 | int regnum = IA64_FR8_REGNUM; | |
2017 | int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type); | |
2018 | ||
2019 | while (n-- > 0) | |
2020 | { | |
004d836a JJ |
2021 | regcache_cooked_read (regcache, regnum, from); |
2022 | convert_typed_floating (from, builtin_type_ia64_ext, | |
2023 | (char *)valbuf + offset, float_elt_type); | |
64a5b29c KB |
2024 | offset += TYPE_LENGTH (float_elt_type); |
2025 | regnum++; | |
2026 | } | |
2027 | } | |
16461d7d | 2028 | else |
004d836a JJ |
2029 | { |
2030 | ULONGEST val; | |
2031 | int offset = 0; | |
2032 | int regnum = IA64_GR8_REGNUM; | |
2033 | int reglen = TYPE_LENGTH (ia64_register_type (NULL, IA64_GR8_REGNUM)); | |
2034 | int n = TYPE_LENGTH (type) / reglen; | |
2035 | int m = TYPE_LENGTH (type) % reglen; | |
16461d7d | 2036 | |
004d836a JJ |
2037 | while (n-- > 0) |
2038 | { | |
2039 | ULONGEST val; | |
2040 | regcache_cooked_read_unsigned (regcache, regnum, &val); | |
2041 | memcpy ((char *)valbuf + offset, &val, reglen); | |
2042 | offset += reglen; | |
2043 | regnum++; | |
2044 | } | |
16461d7d | 2045 | |
004d836a JJ |
2046 | if (m) |
2047 | { | |
2048 | regcache_cooked_read_unsigned (regcache, regnum, &val); | |
2049 | memcpy ((char *)valbuf + offset, &val, m); | |
2050 | } | |
2051 | } | |
16461d7d KB |
2052 | } |
2053 | ||
2054 | CORE_ADDR | |
004d836a | 2055 | ia64_extract_struct_value_address (struct regcache *regcache) |
16461d7d | 2056 | { |
004d836a JJ |
2057 | error ("ia64_extract_struct_value_address called and cannot get struct value address"); |
2058 | return 0; | |
16461d7d KB |
2059 | } |
2060 | ||
16461d7d | 2061 | |
64a5b29c KB |
2062 | static int |
2063 | is_float_or_hfa_type_recurse (struct type *t, struct type **etp) | |
2064 | { | |
2065 | switch (TYPE_CODE (t)) | |
2066 | { | |
2067 | case TYPE_CODE_FLT: | |
2068 | if (*etp) | |
2069 | return TYPE_LENGTH (*etp) == TYPE_LENGTH (t); | |
2070 | else | |
2071 | { | |
2072 | *etp = t; | |
2073 | return 1; | |
2074 | } | |
2075 | break; | |
2076 | case TYPE_CODE_ARRAY: | |
98f96ba1 KB |
2077 | return |
2078 | is_float_or_hfa_type_recurse (check_typedef (TYPE_TARGET_TYPE (t)), | |
2079 | etp); | |
64a5b29c KB |
2080 | break; |
2081 | case TYPE_CODE_STRUCT: | |
2082 | { | |
2083 | int i; | |
2084 | ||
2085 | for (i = 0; i < TYPE_NFIELDS (t); i++) | |
98f96ba1 KB |
2086 | if (!is_float_or_hfa_type_recurse |
2087 | (check_typedef (TYPE_FIELD_TYPE (t, i)), etp)) | |
64a5b29c KB |
2088 | return 0; |
2089 | return 1; | |
2090 | } | |
2091 | break; | |
2092 | default: | |
2093 | return 0; | |
2094 | break; | |
2095 | } | |
2096 | } | |
2097 | ||
2098 | /* Determine if the given type is one of the floating point types or | |
2099 | and HFA (which is a struct, array, or combination thereof whose | |
004d836a | 2100 | bottom-most elements are all of the same floating point type). */ |
64a5b29c KB |
2101 | |
2102 | static struct type * | |
2103 | is_float_or_hfa_type (struct type *t) | |
2104 | { | |
2105 | struct type *et = 0; | |
2106 | ||
2107 | return is_float_or_hfa_type_recurse (t, &et) ? et : 0; | |
2108 | } | |
2109 | ||
2110 | ||
98f96ba1 KB |
2111 | /* Return 1 if the alignment of T is such that the next even slot |
2112 | should be used. Return 0, if the next available slot should | |
2113 | be used. (See section 8.5.1 of the IA-64 Software Conventions | |
004d836a | 2114 | and Runtime manual). */ |
98f96ba1 KB |
2115 | |
2116 | static int | |
2117 | slot_alignment_is_next_even (struct type *t) | |
2118 | { | |
2119 | switch (TYPE_CODE (t)) | |
2120 | { | |
2121 | case TYPE_CODE_INT: | |
2122 | case TYPE_CODE_FLT: | |
2123 | if (TYPE_LENGTH (t) > 8) | |
2124 | return 1; | |
2125 | else | |
2126 | return 0; | |
2127 | case TYPE_CODE_ARRAY: | |
2128 | return | |
2129 | slot_alignment_is_next_even (check_typedef (TYPE_TARGET_TYPE (t))); | |
2130 | case TYPE_CODE_STRUCT: | |
2131 | { | |
2132 | int i; | |
2133 | ||
2134 | for (i = 0; i < TYPE_NFIELDS (t); i++) | |
2135 | if (slot_alignment_is_next_even | |
2136 | (check_typedef (TYPE_FIELD_TYPE (t, i)))) | |
2137 | return 1; | |
2138 | return 0; | |
2139 | } | |
2140 | default: | |
2141 | return 0; | |
2142 | } | |
2143 | } | |
2144 | ||
64a5b29c KB |
2145 | /* Attempt to find (and return) the global pointer for the given |
2146 | function. | |
2147 | ||
2148 | This is a rather nasty bit of code searchs for the .dynamic section | |
2149 | in the objfile corresponding to the pc of the function we're trying | |
2150 | to call. Once it finds the addresses at which the .dynamic section | |
2151 | lives in the child process, it scans the Elf64_Dyn entries for a | |
2152 | DT_PLTGOT tag. If it finds one of these, the corresponding | |
2153 | d_un.d_ptr value is the global pointer. */ | |
2154 | ||
2155 | static CORE_ADDR | |
698cb3f0 | 2156 | generic_elf_find_global_pointer (CORE_ADDR faddr) |
64a5b29c | 2157 | { |
76d689a6 | 2158 | struct obj_section *faddr_sect; |
64a5b29c | 2159 | |
76d689a6 KB |
2160 | faddr_sect = find_pc_section (faddr); |
2161 | if (faddr_sect != NULL) | |
64a5b29c KB |
2162 | { |
2163 | struct obj_section *osect; | |
2164 | ||
76d689a6 | 2165 | ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect) |
64a5b29c KB |
2166 | { |
2167 | if (strcmp (osect->the_bfd_section->name, ".dynamic") == 0) | |
2168 | break; | |
2169 | } | |
2170 | ||
76d689a6 | 2171 | if (osect < faddr_sect->objfile->sections_end) |
64a5b29c KB |
2172 | { |
2173 | CORE_ADDR addr; | |
2174 | ||
2175 | addr = osect->addr; | |
2176 | while (addr < osect->endaddr) | |
2177 | { | |
2178 | int status; | |
2179 | LONGEST tag; | |
2180 | char buf[8]; | |
2181 | ||
2182 | status = target_read_memory (addr, buf, sizeof (buf)); | |
2183 | if (status != 0) | |
2184 | break; | |
2185 | tag = extract_signed_integer (buf, sizeof (buf)); | |
2186 | ||
2187 | if (tag == DT_PLTGOT) | |
2188 | { | |
2189 | CORE_ADDR global_pointer; | |
2190 | ||
2191 | status = target_read_memory (addr + 8, buf, sizeof (buf)); | |
2192 | if (status != 0) | |
2193 | break; | |
7c0b4a20 | 2194 | global_pointer = extract_unsigned_integer (buf, sizeof (buf)); |
64a5b29c KB |
2195 | |
2196 | /* The payoff... */ | |
2197 | return global_pointer; | |
2198 | } | |
2199 | ||
2200 | if (tag == DT_NULL) | |
2201 | break; | |
2202 | ||
2203 | addr += 16; | |
2204 | } | |
2205 | } | |
2206 | } | |
2207 | return 0; | |
2208 | } | |
2209 | ||
2210 | /* Given a function's address, attempt to find (and return) the | |
2211 | corresponding (canonical) function descriptor. Return 0 if | |
004d836a | 2212 | not found. */ |
64a5b29c KB |
2213 | static CORE_ADDR |
2214 | find_extant_func_descr (CORE_ADDR faddr) | |
2215 | { | |
76d689a6 | 2216 | struct obj_section *faddr_sect; |
64a5b29c | 2217 | |
004d836a | 2218 | /* Return early if faddr is already a function descriptor. */ |
76d689a6 KB |
2219 | faddr_sect = find_pc_section (faddr); |
2220 | if (faddr_sect && strcmp (faddr_sect->the_bfd_section->name, ".opd") == 0) | |
64a5b29c KB |
2221 | return faddr; |
2222 | ||
76d689a6 | 2223 | if (faddr_sect != NULL) |
64a5b29c | 2224 | { |
76d689a6 KB |
2225 | struct obj_section *osect; |
2226 | ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect) | |
64a5b29c KB |
2227 | { |
2228 | if (strcmp (osect->the_bfd_section->name, ".opd") == 0) | |
2229 | break; | |
2230 | } | |
2231 | ||
76d689a6 | 2232 | if (osect < faddr_sect->objfile->sections_end) |
64a5b29c KB |
2233 | { |
2234 | CORE_ADDR addr; | |
2235 | ||
2236 | addr = osect->addr; | |
2237 | while (addr < osect->endaddr) | |
2238 | { | |
2239 | int status; | |
2240 | LONGEST faddr2; | |
2241 | char buf[8]; | |
2242 | ||
2243 | status = target_read_memory (addr, buf, sizeof (buf)); | |
2244 | if (status != 0) | |
2245 | break; | |
2246 | faddr2 = extract_signed_integer (buf, sizeof (buf)); | |
2247 | ||
2248 | if (faddr == faddr2) | |
2249 | return addr; | |
2250 | ||
2251 | addr += 16; | |
2252 | } | |
2253 | } | |
2254 | } | |
2255 | return 0; | |
2256 | } | |
2257 | ||
2258 | /* Attempt to find a function descriptor corresponding to the | |
2259 | given address. If none is found, construct one on the | |
004d836a | 2260 | stack using the address at fdaptr. */ |
64a5b29c KB |
2261 | |
2262 | static CORE_ADDR | |
2263 | find_func_descr (CORE_ADDR faddr, CORE_ADDR *fdaptr) | |
2264 | { | |
2265 | CORE_ADDR fdesc; | |
2266 | ||
2267 | fdesc = find_extant_func_descr (faddr); | |
2268 | ||
2269 | if (fdesc == 0) | |
2270 | { | |
2271 | CORE_ADDR global_pointer; | |
2272 | char buf[16]; | |
2273 | ||
2274 | fdesc = *fdaptr; | |
2275 | *fdaptr += 16; | |
2276 | ||
698cb3f0 | 2277 | global_pointer = FIND_GLOBAL_POINTER (faddr); |
64a5b29c KB |
2278 | |
2279 | if (global_pointer == 0) | |
2280 | global_pointer = read_register (IA64_GR1_REGNUM); | |
2281 | ||
fbd9dcd3 AC |
2282 | store_unsigned_integer (buf, 8, faddr); |
2283 | store_unsigned_integer (buf + 8, 8, global_pointer); | |
64a5b29c KB |
2284 | |
2285 | write_memory (fdesc, buf, 16); | |
2286 | } | |
2287 | ||
2288 | return fdesc; | |
2289 | } | |
16461d7d | 2290 | |
af8b88dd JJ |
2291 | /* Use the following routine when printing out function pointers |
2292 | so the user can see the function address rather than just the | |
2293 | function descriptor. */ | |
2294 | static CORE_ADDR | |
2295 | ia64_convert_from_func_ptr_addr (CORE_ADDR addr) | |
2296 | { | |
2297 | struct obj_section *s; | |
2298 | ||
2299 | s = find_pc_section (addr); | |
2300 | ||
2301 | /* check if ADDR points to a function descriptor. */ | |
2302 | if (s && strcmp (s->the_bfd_section->name, ".opd") == 0) | |
2303 | return read_memory_unsigned_integer (addr, 8); | |
2304 | ||
2305 | return addr; | |
2306 | } | |
2307 | ||
a78f21af | 2308 | static CORE_ADDR |
004d836a JJ |
2309 | ia64_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp) |
2310 | { | |
2311 | return sp & ~0xfLL; | |
2312 | } | |
2313 | ||
2314 | static CORE_ADDR | |
2315 | ia64_push_dummy_call (struct gdbarch *gdbarch, CORE_ADDR func_addr, | |
8dd5115e AS |
2316 | struct regcache *regcache, CORE_ADDR bp_addr, |
2317 | int nargs, struct value **args, CORE_ADDR sp, | |
2318 | int struct_return, CORE_ADDR struct_addr) | |
16461d7d KB |
2319 | { |
2320 | int argno; | |
ea7c478f | 2321 | struct value *arg; |
16461d7d KB |
2322 | struct type *type; |
2323 | int len, argoffset; | |
64a5b29c | 2324 | int nslots, rseslots, memslots, slotnum, nfuncargs; |
16461d7d | 2325 | int floatreg; |
004d836a | 2326 | CORE_ADDR bsp, cfm, pfs, new_bsp, funcdescaddr, pc, global_pointer; |
16461d7d KB |
2327 | |
2328 | nslots = 0; | |
64a5b29c | 2329 | nfuncargs = 0; |
004d836a | 2330 | /* Count the number of slots needed for the arguments. */ |
16461d7d KB |
2331 | for (argno = 0; argno < nargs; argno++) |
2332 | { | |
2333 | arg = args[argno]; | |
2334 | type = check_typedef (VALUE_TYPE (arg)); | |
2335 | len = TYPE_LENGTH (type); | |
2336 | ||
98f96ba1 | 2337 | if ((nslots & 1) && slot_alignment_is_next_even (type)) |
16461d7d KB |
2338 | nslots++; |
2339 | ||
64a5b29c KB |
2340 | if (TYPE_CODE (type) == TYPE_CODE_FUNC) |
2341 | nfuncargs++; | |
2342 | ||
16461d7d KB |
2343 | nslots += (len + 7) / 8; |
2344 | } | |
2345 | ||
004d836a | 2346 | /* Divvy up the slots between the RSE and the memory stack. */ |
16461d7d KB |
2347 | rseslots = (nslots > 8) ? 8 : nslots; |
2348 | memslots = nslots - rseslots; | |
2349 | ||
004d836a JJ |
2350 | /* Allocate a new RSE frame. */ |
2351 | cfm = read_register (IA64_CFM_REGNUM); | |
16461d7d | 2352 | |
004d836a | 2353 | bsp = read_register (IA64_BSP_REGNUM); |
16461d7d | 2354 | new_bsp = rse_address_add (bsp, rseslots); |
004d836a | 2355 | write_register (IA64_BSP_REGNUM, new_bsp); |
16461d7d | 2356 | |
004d836a | 2357 | pfs = read_register (IA64_PFS_REGNUM); |
16461d7d KB |
2358 | pfs &= 0xc000000000000000LL; |
2359 | pfs |= (cfm & 0xffffffffffffLL); | |
004d836a | 2360 | write_register (IA64_PFS_REGNUM, pfs); |
16461d7d KB |
2361 | |
2362 | cfm &= 0xc000000000000000LL; | |
2363 | cfm |= rseslots; | |
004d836a | 2364 | write_register (IA64_CFM_REGNUM, cfm); |
16461d7d | 2365 | |
64a5b29c KB |
2366 | /* We will attempt to find function descriptors in the .opd segment, |
2367 | but if we can't we'll construct them ourselves. That being the | |
004d836a | 2368 | case, we'll need to reserve space on the stack for them. */ |
64a5b29c KB |
2369 | funcdescaddr = sp - nfuncargs * 16; |
2370 | funcdescaddr &= ~0xfLL; | |
2371 | ||
2372 | /* Adjust the stack pointer to it's new value. The calling conventions | |
2373 | require us to have 16 bytes of scratch, plus whatever space is | |
004d836a | 2374 | necessary for the memory slots and our function descriptors. */ |
64a5b29c | 2375 | sp = sp - 16 - (memslots + nfuncargs) * 8; |
004d836a | 2376 | sp &= ~0xfLL; /* Maintain 16 byte alignment. */ |
16461d7d | 2377 | |
64a5b29c KB |
2378 | /* Place the arguments where they belong. The arguments will be |
2379 | either placed in the RSE backing store or on the memory stack. | |
2380 | In addition, floating point arguments or HFAs are placed in | |
004d836a | 2381 | floating point registers. */ |
16461d7d KB |
2382 | slotnum = 0; |
2383 | floatreg = IA64_FR8_REGNUM; | |
2384 | for (argno = 0; argno < nargs; argno++) | |
2385 | { | |
64a5b29c KB |
2386 | struct type *float_elt_type; |
2387 | ||
16461d7d KB |
2388 | arg = args[argno]; |
2389 | type = check_typedef (VALUE_TYPE (arg)); | |
2390 | len = TYPE_LENGTH (type); | |
64a5b29c | 2391 | |
004d836a | 2392 | /* Special handling for function parameters. */ |
64a5b29c KB |
2393 | if (len == 8 |
2394 | && TYPE_CODE (type) == TYPE_CODE_PTR | |
2395 | && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC) | |
2396 | { | |
2397 | char val_buf[8]; | |
2398 | ||
fbd9dcd3 | 2399 | store_unsigned_integer (val_buf, 8, |
7c0b4a20 | 2400 | find_func_descr (extract_unsigned_integer (VALUE_CONTENTS (arg), 8), |
fbd9dcd3 | 2401 | &funcdescaddr)); |
64a5b29c KB |
2402 | if (slotnum < rseslots) |
2403 | write_memory (rse_address_add (bsp, slotnum), val_buf, 8); | |
2404 | else | |
2405 | write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8); | |
2406 | slotnum++; | |
2407 | continue; | |
2408 | } | |
2409 | ||
004d836a | 2410 | /* Normal slots. */ |
98f96ba1 KB |
2411 | |
2412 | /* Skip odd slot if necessary... */ | |
2413 | if ((slotnum & 1) && slot_alignment_is_next_even (type)) | |
16461d7d | 2414 | slotnum++; |
98f96ba1 | 2415 | |
16461d7d KB |
2416 | argoffset = 0; |
2417 | while (len > 0) | |
2418 | { | |
2419 | char val_buf[8]; | |
2420 | ||
2421 | memset (val_buf, 0, 8); | |
2422 | memcpy (val_buf, VALUE_CONTENTS (arg) + argoffset, (len > 8) ? 8 : len); | |
2423 | ||
2424 | if (slotnum < rseslots) | |
2425 | write_memory (rse_address_add (bsp, slotnum), val_buf, 8); | |
2426 | else | |
2427 | write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8); | |
2428 | ||
2429 | argoffset += 8; | |
2430 | len -= 8; | |
2431 | slotnum++; | |
2432 | } | |
64a5b29c | 2433 | |
004d836a | 2434 | /* Handle floating point types (including HFAs). */ |
64a5b29c KB |
2435 | float_elt_type = is_float_or_hfa_type (type); |
2436 | if (float_elt_type != NULL) | |
2437 | { | |
2438 | argoffset = 0; | |
2439 | len = TYPE_LENGTH (type); | |
2440 | while (len > 0 && floatreg < IA64_FR16_REGNUM) | |
2441 | { | |
004d836a JJ |
2442 | char to[MAX_REGISTER_SIZE]; |
2443 | convert_typed_floating (VALUE_CONTENTS (arg) + argoffset, float_elt_type, | |
2444 | to, builtin_type_ia64_ext); | |
2445 | regcache_cooked_write (regcache, floatreg, (void *)to); | |
64a5b29c KB |
2446 | floatreg++; |
2447 | argoffset += TYPE_LENGTH (float_elt_type); | |
2448 | len -= TYPE_LENGTH (float_elt_type); | |
2449 | } | |
16461d7d KB |
2450 | } |
2451 | } | |
2452 | ||
004d836a | 2453 | /* Store the struct return value in r8 if necessary. */ |
16461d7d KB |
2454 | if (struct_return) |
2455 | { | |
004d836a | 2456 | regcache_cooked_write_unsigned (regcache, IA64_GR8_REGNUM, (ULONGEST)struct_addr); |
16461d7d KB |
2457 | } |
2458 | ||
004d836a | 2459 | global_pointer = FIND_GLOBAL_POINTER (func_addr); |
8dd5115e | 2460 | |
004d836a JJ |
2461 | if (global_pointer != 0) |
2462 | write_register (IA64_GR1_REGNUM, global_pointer); | |
a59fe496 | 2463 | |
004d836a | 2464 | write_register (IA64_BR0_REGNUM, bp_addr); |
16461d7d | 2465 | |
004d836a | 2466 | write_register (sp_regnum, sp); |
16461d7d KB |
2467 | |
2468 | return sp; | |
2469 | } | |
2470 | ||
004d836a JJ |
2471 | static struct frame_id |
2472 | ia64_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
16461d7d | 2473 | { |
004d836a JJ |
2474 | char buf[8]; |
2475 | CORE_ADDR sp; | |
2476 | ||
2477 | frame_unwind_register (next_frame, sp_regnum, buf); | |
2478 | sp = extract_unsigned_integer (buf, 8); | |
2479 | ||
2480 | return frame_id_build (sp, frame_pc_unwind (next_frame)); | |
16461d7d KB |
2481 | } |
2482 | ||
004d836a JJ |
2483 | static CORE_ADDR |
2484 | ia64_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
16461d7d | 2485 | { |
004d836a JJ |
2486 | char buf[8]; |
2487 | CORE_ADDR ip, psr, pc; | |
2488 | ||
2489 | frame_unwind_register (next_frame, IA64_IP_REGNUM, buf); | |
2490 | ip = extract_unsigned_integer (buf, 8); | |
2491 | frame_unwind_register (next_frame, IA64_PSR_REGNUM, buf); | |
2492 | psr = extract_unsigned_integer (buf, 8); | |
2493 | ||
2494 | pc = (ip & ~0xf) | ((psr >> 41) & 3); | |
2495 | return pc; | |
16461d7d KB |
2496 | } |
2497 | ||
2498 | static void | |
004d836a | 2499 | ia64_store_return_value (struct type *type, struct regcache *regcache, const void *valbuf) |
16461d7d | 2500 | { |
004d836a | 2501 | if (TYPE_CODE (type) == TYPE_CODE_FLT) |
16461d7d | 2502 | { |
004d836a JJ |
2503 | char to[MAX_REGISTER_SIZE]; |
2504 | convert_typed_floating (valbuf, type, to, builtin_type_ia64_ext); | |
2505 | regcache_cooked_write (regcache, IA64_FR8_REGNUM, (void *)to); | |
2506 | target_store_registers (IA64_FR8_REGNUM); | |
16461d7d KB |
2507 | } |
2508 | else | |
004d836a | 2509 | regcache_cooked_write (regcache, IA64_GR8_REGNUM, valbuf); |
16461d7d KB |
2510 | } |
2511 | ||
2512 | static void | |
1750fa04 AC |
2513 | ia64_remote_translate_xfer_address (struct gdbarch *gdbarch, |
2514 | struct regcache *regcache, | |
2515 | CORE_ADDR memaddr, int nr_bytes, | |
16461d7d KB |
2516 | CORE_ADDR *targ_addr, int *targ_len) |
2517 | { | |
2518 | *targ_addr = memaddr; | |
2519 | *targ_len = nr_bytes; | |
2520 | } | |
2521 | ||
244bc108 KB |
2522 | static void |
2523 | process_note_abi_tag_sections (bfd *abfd, asection *sect, void *obj) | |
2524 | { | |
2525 | int *os_ident_ptr = obj; | |
2526 | const char *name; | |
2527 | unsigned int sectsize; | |
2528 | ||
2529 | name = bfd_get_section_name (abfd, sect); | |
2530 | sectsize = bfd_section_size (abfd, sect); | |
2531 | if (strcmp (name, ".note.ABI-tag") == 0 && sectsize > 0) | |
2532 | { | |
2533 | unsigned int name_length, data_length, note_type; | |
2534 | char *note = alloca (sectsize); | |
2535 | ||
2536 | bfd_get_section_contents (abfd, sect, note, | |
2537 | (file_ptr) 0, (bfd_size_type) sectsize); | |
2538 | ||
2539 | name_length = bfd_h_get_32 (abfd, note); | |
2540 | data_length = bfd_h_get_32 (abfd, note + 4); | |
2541 | note_type = bfd_h_get_32 (abfd, note + 8); | |
2542 | ||
2543 | if (name_length == 4 && data_length == 16 && note_type == 1 | |
2544 | && strcmp (note + 12, "GNU") == 0) | |
2545 | { | |
2546 | int os_number = bfd_h_get_32 (abfd, note + 16); | |
2547 | ||
004d836a | 2548 | /* The case numbers are from abi-tags in glibc. */ |
244bc108 KB |
2549 | switch (os_number) |
2550 | { | |
2551 | case 0 : | |
2552 | *os_ident_ptr = ELFOSABI_LINUX; | |
2553 | break; | |
244bc108 KB |
2554 | case 1 : |
2555 | *os_ident_ptr = ELFOSABI_HURD; | |
2556 | break; | |
2557 | case 2 : | |
2558 | *os_ident_ptr = ELFOSABI_SOLARIS; | |
2559 | break; | |
244bc108 | 2560 | default : |
8e65ff28 AC |
2561 | internal_error (__FILE__, __LINE__, |
2562 | "process_note_abi_sections: unknown OS number %d", os_number); | |
244bc108 KB |
2563 | break; |
2564 | } | |
2565 | } | |
2566 | } | |
2567 | } | |
2568 | ||
6926787d AS |
2569 | static int |
2570 | ia64_print_insn (bfd_vma memaddr, struct disassemble_info *info) | |
2571 | { | |
2572 | info->bytes_per_line = SLOT_MULTIPLIER; | |
2573 | return print_insn_ia64 (memaddr, info); | |
2574 | } | |
2575 | ||
16461d7d KB |
2576 | static struct gdbarch * |
2577 | ia64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
2578 | { | |
2579 | struct gdbarch *gdbarch; | |
244bc108 KB |
2580 | struct gdbarch_tdep *tdep; |
2581 | int os_ident; | |
2582 | ||
2583 | if (info.abfd != NULL | |
2584 | && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour) | |
2585 | { | |
2586 | os_ident = elf_elfheader (info.abfd)->e_ident[EI_OSABI]; | |
2587 | ||
ca557f44 AC |
2588 | /* If os_ident is 0, it is not necessarily the case that we're |
2589 | on a SYSV system. (ELFOSABI_NONE is defined to be 0.) | |
2590 | GNU/Linux uses a note section to record OS/ABI info, but | |
2591 | leaves e_ident[EI_OSABI] zero. So we have to check for note | |
004d836a | 2592 | sections too. */ |
244bc108 KB |
2593 | if (os_ident == 0) |
2594 | { | |
2595 | bfd_map_over_sections (info.abfd, | |
2596 | process_note_abi_tag_sections, | |
2597 | &os_ident); | |
2598 | } | |
2599 | } | |
2600 | else | |
2601 | os_ident = -1; | |
16461d7d | 2602 | |
244bc108 KB |
2603 | for (arches = gdbarch_list_lookup_by_info (arches, &info); |
2604 | arches != NULL; | |
2605 | arches = gdbarch_list_lookup_by_info (arches->next, &info)) | |
2606 | { | |
57bc8964 KB |
2607 | tdep = gdbarch_tdep (arches->gdbarch); |
2608 | if (tdep &&tdep->os_ident == os_ident) | |
2609 | return arches->gdbarch; | |
244bc108 | 2610 | } |
16461d7d | 2611 | |
244bc108 KB |
2612 | tdep = xmalloc (sizeof (struct gdbarch_tdep)); |
2613 | gdbarch = gdbarch_alloc (&info, tdep); | |
2614 | tdep->os_ident = os_ident; | |
2615 | ||
d7fa2ae2 KB |
2616 | /* Set the method of obtaining the sigcontext addresses at which |
2617 | registers are saved. The method of checking to see if | |
2618 | native_find_global_pointer is nonzero to indicate that we're | |
2619 | on AIX is kind of hokey, but I can't think of a better way | |
2620 | to do it. */ | |
244bc108 KB |
2621 | if (os_ident == ELFOSABI_LINUX) |
2622 | tdep->sigcontext_register_address = ia64_linux_sigcontext_register_address; | |
d7fa2ae2 KB |
2623 | else if (native_find_global_pointer != 0) |
2624 | tdep->sigcontext_register_address = ia64_aix_sigcontext_register_address; | |
244bc108 KB |
2625 | else |
2626 | tdep->sigcontext_register_address = 0; | |
16461d7d | 2627 | |
ca557f44 AC |
2628 | /* We know that GNU/Linux won't have to resort to the |
2629 | native_find_global_pointer hackery. But that's the only one we | |
2630 | know about so far, so if native_find_global_pointer is set to | |
2631 | something non-zero, then use it. Otherwise fall back to using | |
2632 | generic_elf_find_global_pointer. This arrangement should (in | |
2633 | theory) allow us to cross debug GNU/Linux binaries from an AIX | |
2634 | machine. */ | |
698cb3f0 KB |
2635 | if (os_ident == ELFOSABI_LINUX) |
2636 | tdep->find_global_pointer = generic_elf_find_global_pointer; | |
2637 | else if (native_find_global_pointer != 0) | |
2638 | tdep->find_global_pointer = native_find_global_pointer; | |
2639 | else | |
2640 | tdep->find_global_pointer = generic_elf_find_global_pointer; | |
2641 | ||
004d836a JJ |
2642 | /* Define the ia64 floating-point format to gdb. */ |
2643 | builtin_type_ia64_ext = | |
2644 | init_type (TYPE_CODE_FLT, 128 / 8, | |
2645 | 0, "builtin_type_ia64_ext", NULL); | |
2646 | TYPE_FLOATFORMAT (builtin_type_ia64_ext) = &floatformat_ia64_ext; | |
2647 | ||
16461d7d KB |
2648 | set_gdbarch_short_bit (gdbarch, 16); |
2649 | set_gdbarch_int_bit (gdbarch, 32); | |
2650 | set_gdbarch_long_bit (gdbarch, 64); | |
2651 | set_gdbarch_long_long_bit (gdbarch, 64); | |
2652 | set_gdbarch_float_bit (gdbarch, 32); | |
2653 | set_gdbarch_double_bit (gdbarch, 64); | |
33c08150 | 2654 | set_gdbarch_long_double_bit (gdbarch, 128); |
16461d7d KB |
2655 | set_gdbarch_ptr_bit (gdbarch, 64); |
2656 | ||
004d836a JJ |
2657 | set_gdbarch_num_regs (gdbarch, NUM_IA64_RAW_REGS); |
2658 | set_gdbarch_num_pseudo_regs (gdbarch, LAST_PSEUDO_REGNUM - FIRST_PSEUDO_REGNUM); | |
16461d7d | 2659 | set_gdbarch_sp_regnum (gdbarch, sp_regnum); |
698cb3f0 | 2660 | set_gdbarch_fp0_regnum (gdbarch, IA64_FR0_REGNUM); |
16461d7d KB |
2661 | |
2662 | set_gdbarch_register_name (gdbarch, ia64_register_name); | |
004d836a JJ |
2663 | /* FIXME: Following interface should not be needed, however, without it recurse.exp |
2664 | gets a number of extra failures. */ | |
b1e29e33 | 2665 | set_gdbarch_deprecated_register_size (gdbarch, 8); |
004d836a | 2666 | set_gdbarch_register_type (gdbarch, ia64_register_type); |
16461d7d | 2667 | |
004d836a JJ |
2668 | set_gdbarch_pseudo_register_read (gdbarch, ia64_pseudo_register_read); |
2669 | set_gdbarch_pseudo_register_write (gdbarch, ia64_pseudo_register_write); | |
2670 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, ia64_dwarf_reg_to_regnum); | |
2671 | set_gdbarch_register_reggroup_p (gdbarch, ia64_register_reggroup_p); | |
2672 | set_gdbarch_convert_register_p (gdbarch, ia64_convert_register_p); | |
2673 | set_gdbarch_register_to_value (gdbarch, ia64_register_to_value); | |
2674 | set_gdbarch_value_to_register (gdbarch, ia64_value_to_register); | |
16461d7d | 2675 | |
004d836a | 2676 | set_gdbarch_skip_prologue (gdbarch, ia64_skip_prologue); |
16461d7d KB |
2677 | |
2678 | set_gdbarch_use_struct_convention (gdbarch, ia64_use_struct_convention); | |
004d836a | 2679 | set_gdbarch_extract_return_value (gdbarch, ia64_extract_return_value); |
16461d7d | 2680 | |
004d836a JJ |
2681 | set_gdbarch_store_return_value (gdbarch, ia64_store_return_value); |
2682 | set_gdbarch_extract_struct_value_address (gdbarch, ia64_extract_struct_value_address); | |
16461d7d KB |
2683 | |
2684 | set_gdbarch_memory_insert_breakpoint (gdbarch, ia64_memory_insert_breakpoint); | |
2685 | set_gdbarch_memory_remove_breakpoint (gdbarch, ia64_memory_remove_breakpoint); | |
2686 | set_gdbarch_breakpoint_from_pc (gdbarch, ia64_breakpoint_from_pc); | |
2687 | set_gdbarch_read_pc (gdbarch, ia64_read_pc); | |
2688 | set_gdbarch_write_pc (gdbarch, ia64_write_pc); | |
2689 | ||
2690 | /* Settings for calling functions in the inferior. */ | |
8dd5115e | 2691 | set_gdbarch_push_dummy_call (gdbarch, ia64_push_dummy_call); |
004d836a JJ |
2692 | set_gdbarch_frame_align (gdbarch, ia64_frame_align); |
2693 | set_gdbarch_unwind_dummy_id (gdbarch, ia64_unwind_dummy_id); | |
16461d7d | 2694 | |
004d836a JJ |
2695 | set_gdbarch_unwind_pc (gdbarch, ia64_unwind_pc); |
2696 | frame_unwind_append_sniffer (gdbarch, ia64_sigtramp_frame_sniffer); | |
2697 | frame_unwind_append_sniffer (gdbarch, ia64_frame_sniffer); | |
2698 | frame_base_set_default (gdbarch, &ia64_frame_base); | |
16461d7d KB |
2699 | |
2700 | /* Settings that should be unnecessary. */ | |
2701 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); | |
2702 | ||
16461d7d KB |
2703 | set_gdbarch_decr_pc_after_break (gdbarch, 0); |
2704 | set_gdbarch_function_start_offset (gdbarch, 0); | |
4156bb53 | 2705 | set_gdbarch_frame_args_skip (gdbarch, 0); |
16461d7d KB |
2706 | |
2707 | set_gdbarch_remote_translate_xfer_address ( | |
2708 | gdbarch, ia64_remote_translate_xfer_address); | |
2709 | ||
6926787d | 2710 | set_gdbarch_print_insn (gdbarch, ia64_print_insn); |
af8b88dd | 2711 | set_gdbarch_convert_from_func_ptr_addr (gdbarch, ia64_convert_from_func_ptr_addr); |
6926787d | 2712 | |
16461d7d KB |
2713 | return gdbarch; |
2714 | } | |
2715 | ||
a78f21af AC |
2716 | extern initialize_file_ftype _initialize_ia64_tdep; /* -Wmissing-prototypes */ |
2717 | ||
16461d7d KB |
2718 | void |
2719 | _initialize_ia64_tdep (void) | |
2720 | { | |
2721 | register_gdbarch_init (bfd_arch_ia64, ia64_gdbarch_init); | |
16461d7d | 2722 | } |