1 /* Target-dependent code for the IA-64 for GDB, the GNU debugger.
3 Copyright (C) 1999-2014 Free Software Foundation, Inc.
5 This file is part of GDB.
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 3 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "arch-utils.h"
24 #include "floatformat.h"
27 #include "reggroups.h"
29 #include "frame-base.h"
30 #include "frame-unwind.h"
33 #include "gdb_assert.h"
35 #include "elf/common.h" /* for DT_PLTGOT value */
40 #include "ia64-tdep.h"
43 #ifdef HAVE_LIBUNWIND_IA64_H
44 #include "elf/ia64.h" /* for PT_IA_64_UNWIND value */
45 #include "ia64-libunwind-tdep.h"
47 /* Note: KERNEL_START is supposed to be an address which is not going
48 to ever contain any valid unwind info. For ia64 linux, the choice
49 of 0xc000000000000000 is fairly safe since that's uncached space.
51 We use KERNEL_START as follows: after obtaining the kernel's
52 unwind table via getunwind(), we project its unwind data into
53 address-range KERNEL_START-(KERNEL_START+ktab_size) and then
54 when ia64_access_mem() sees a memory access to this
55 address-range, we redirect it to ktab instead.
57 None of this hackery is needed with a modern kernel/libcs
58 which uses the kernel virtual DSO to provide access to the
59 kernel's unwind info. In that case, ktab_size remains 0 and
60 hence the value of KERNEL_START doesn't matter. */
62 #define KERNEL_START 0xc000000000000000ULL
64 static size_t ktab_size = 0;
65 struct ia64_table_entry
67 uint64_t start_offset;
72 static struct ia64_table_entry *ktab = NULL;
76 /* An enumeration of the different IA-64 instruction types. */
78 typedef enum instruction_type
80 A, /* Integer ALU ; I-unit or M-unit */
81 I, /* Non-ALU integer; I-unit */
82 M, /* Memory ; M-unit */
83 F, /* Floating-point ; F-unit */
84 B, /* Branch ; B-unit */
85 L, /* Extended (L+X) ; I-unit */
86 X, /* Extended (L+X) ; I-unit */
87 undefined /* undefined or reserved */
90 /* We represent IA-64 PC addresses as the value of the instruction
91 pointer or'd with some bit combination in the low nibble which
92 represents the slot number in the bundle addressed by the
93 instruction pointer. The problem is that the Linux kernel
94 multiplies its slot numbers (for exceptions) by one while the
95 disassembler multiplies its slot numbers by 6. In addition, I've
96 heard it said that the simulator uses 1 as the multiplier.
98 I've fixed the disassembler so that the bytes_per_line field will
99 be the slot multiplier. If bytes_per_line comes in as zero, it
100 is set to six (which is how it was set up initially). -- objdump
101 displays pretty disassembly dumps with this value. For our purposes,
102 we'll set bytes_per_line to SLOT_MULTIPLIER. This is okay since we
103 never want to also display the raw bytes the way objdump does. */
105 #define SLOT_MULTIPLIER 1
107 /* Length in bytes of an instruction bundle. */
109 #define BUNDLE_LEN 16
111 /* See the saved memory layout comment for ia64_memory_insert_breakpoint. */
113 #if BREAKPOINT_MAX < BUNDLE_LEN - 2
114 # error "BREAKPOINT_MAX < BUNDLE_LEN - 2"
117 static gdbarch_init_ftype ia64_gdbarch_init;
119 static gdbarch_register_name_ftype ia64_register_name;
120 static gdbarch_register_type_ftype ia64_register_type;
121 static gdbarch_breakpoint_from_pc_ftype ia64_breakpoint_from_pc;
122 static gdbarch_skip_prologue_ftype ia64_skip_prologue;
123 static struct type *is_float_or_hfa_type (struct type *t);
124 static CORE_ADDR ia64_find_global_pointer (struct gdbarch *gdbarch,
127 #define NUM_IA64_RAW_REGS 462
129 static int sp_regnum = IA64_GR12_REGNUM;
130 static int fp_regnum = IA64_VFP_REGNUM;
131 static int lr_regnum = IA64_VRAP_REGNUM;
133 /* NOTE: we treat the register stack registers r32-r127 as
134 pseudo-registers because they may not be accessible via the ptrace
135 register get/set interfaces. */
137 enum pseudo_regs { FIRST_PSEUDO_REGNUM = NUM_IA64_RAW_REGS,
138 VBOF_REGNUM = IA64_NAT127_REGNUM + 1, V32_REGNUM,
139 V127_REGNUM = V32_REGNUM + 95,
140 VP0_REGNUM, VP16_REGNUM = VP0_REGNUM + 16,
141 VP63_REGNUM = VP0_REGNUM + 63, LAST_PSEUDO_REGNUM };
143 /* Array of register names; There should be ia64_num_regs strings in
146 static char *ia64_register_names[] =
147 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
148 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
149 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
150 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
151 "", "", "", "", "", "", "", "",
152 "", "", "", "", "", "", "", "",
153 "", "", "", "", "", "", "", "",
154 "", "", "", "", "", "", "", "",
155 "", "", "", "", "", "", "", "",
156 "", "", "", "", "", "", "", "",
157 "", "", "", "", "", "", "", "",
158 "", "", "", "", "", "", "", "",
159 "", "", "", "", "", "", "", "",
160 "", "", "", "", "", "", "", "",
161 "", "", "", "", "", "", "", "",
162 "", "", "", "", "", "", "", "",
164 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
165 "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
166 "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
167 "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
168 "f32", "f33", "f34", "f35", "f36", "f37", "f38", "f39",
169 "f40", "f41", "f42", "f43", "f44", "f45", "f46", "f47",
170 "f48", "f49", "f50", "f51", "f52", "f53", "f54", "f55",
171 "f56", "f57", "f58", "f59", "f60", "f61", "f62", "f63",
172 "f64", "f65", "f66", "f67", "f68", "f69", "f70", "f71",
173 "f72", "f73", "f74", "f75", "f76", "f77", "f78", "f79",
174 "f80", "f81", "f82", "f83", "f84", "f85", "f86", "f87",
175 "f88", "f89", "f90", "f91", "f92", "f93", "f94", "f95",
176 "f96", "f97", "f98", "f99", "f100", "f101", "f102", "f103",
177 "f104", "f105", "f106", "f107", "f108", "f109", "f110", "f111",
178 "f112", "f113", "f114", "f115", "f116", "f117", "f118", "f119",
179 "f120", "f121", "f122", "f123", "f124", "f125", "f126", "f127",
181 "", "", "", "", "", "", "", "",
182 "", "", "", "", "", "", "", "",
183 "", "", "", "", "", "", "", "",
184 "", "", "", "", "", "", "", "",
185 "", "", "", "", "", "", "", "",
186 "", "", "", "", "", "", "", "",
187 "", "", "", "", "", "", "", "",
188 "", "", "", "", "", "", "", "",
190 "b0", "b1", "b2", "b3", "b4", "b5", "b6", "b7",
194 "pr", "ip", "psr", "cfm",
196 "kr0", "kr1", "kr2", "kr3", "kr4", "kr5", "kr6", "kr7",
197 "", "", "", "", "", "", "", "",
198 "rsc", "bsp", "bspstore", "rnat",
200 "eflag", "csd", "ssd", "cflg", "fsr", "fir", "fdr", "",
201 "ccv", "", "", "", "unat", "", "", "",
202 "fpsr", "", "", "", "itc",
203 "", "", "", "", "", "", "", "", "", "",
204 "", "", "", "", "", "", "", "", "",
206 "", "", "", "", "", "", "", "", "", "",
207 "", "", "", "", "", "", "", "", "", "",
208 "", "", "", "", "", "", "", "", "", "",
209 "", "", "", "", "", "", "", "", "", "",
210 "", "", "", "", "", "", "", "", "", "",
211 "", "", "", "", "", "", "", "", "", "",
213 "nat0", "nat1", "nat2", "nat3", "nat4", "nat5", "nat6", "nat7",
214 "nat8", "nat9", "nat10", "nat11", "nat12", "nat13", "nat14", "nat15",
215 "nat16", "nat17", "nat18", "nat19", "nat20", "nat21", "nat22", "nat23",
216 "nat24", "nat25", "nat26", "nat27", "nat28", "nat29", "nat30", "nat31",
217 "nat32", "nat33", "nat34", "nat35", "nat36", "nat37", "nat38", "nat39",
218 "nat40", "nat41", "nat42", "nat43", "nat44", "nat45", "nat46", "nat47",
219 "nat48", "nat49", "nat50", "nat51", "nat52", "nat53", "nat54", "nat55",
220 "nat56", "nat57", "nat58", "nat59", "nat60", "nat61", "nat62", "nat63",
221 "nat64", "nat65", "nat66", "nat67", "nat68", "nat69", "nat70", "nat71",
222 "nat72", "nat73", "nat74", "nat75", "nat76", "nat77", "nat78", "nat79",
223 "nat80", "nat81", "nat82", "nat83", "nat84", "nat85", "nat86", "nat87",
224 "nat88", "nat89", "nat90", "nat91", "nat92", "nat93", "nat94", "nat95",
225 "nat96", "nat97", "nat98", "nat99", "nat100","nat101","nat102","nat103",
226 "nat104","nat105","nat106","nat107","nat108","nat109","nat110","nat111",
227 "nat112","nat113","nat114","nat115","nat116","nat117","nat118","nat119",
228 "nat120","nat121","nat122","nat123","nat124","nat125","nat126","nat127",
232 "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39",
233 "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47",
234 "r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55",
235 "r56", "r57", "r58", "r59", "r60", "r61", "r62", "r63",
236 "r64", "r65", "r66", "r67", "r68", "r69", "r70", "r71",
237 "r72", "r73", "r74", "r75", "r76", "r77", "r78", "r79",
238 "r80", "r81", "r82", "r83", "r84", "r85", "r86", "r87",
239 "r88", "r89", "r90", "r91", "r92", "r93", "r94", "r95",
240 "r96", "r97", "r98", "r99", "r100", "r101", "r102", "r103",
241 "r104", "r105", "r106", "r107", "r108", "r109", "r110", "r111",
242 "r112", "r113", "r114", "r115", "r116", "r117", "r118", "r119",
243 "r120", "r121", "r122", "r123", "r124", "r125", "r126", "r127",
245 "p0", "p1", "p2", "p3", "p4", "p5", "p6", "p7",
246 "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15",
247 "p16", "p17", "p18", "p19", "p20", "p21", "p22", "p23",
248 "p24", "p25", "p26", "p27", "p28", "p29", "p30", "p31",
249 "p32", "p33", "p34", "p35", "p36", "p37", "p38", "p39",
250 "p40", "p41", "p42", "p43", "p44", "p45", "p46", "p47",
251 "p48", "p49", "p50", "p51", "p52", "p53", "p54", "p55",
252 "p56", "p57", "p58", "p59", "p60", "p61", "p62", "p63",
255 struct ia64_frame_cache
257 CORE_ADDR base; /* frame pointer base for frame */
258 CORE_ADDR pc; /* function start pc for frame */
259 CORE_ADDR saved_sp; /* stack pointer for frame */
260 CORE_ADDR bsp; /* points at r32 for the current frame */
261 CORE_ADDR cfm; /* cfm value for current frame */
262 CORE_ADDR prev_cfm; /* cfm value for previous frame */
264 int sof; /* Size of frame (decoded from cfm value). */
265 int sol; /* Size of locals (decoded from cfm value). */
266 int sor; /* Number of rotating registers (decoded from
268 CORE_ADDR after_prologue;
269 /* Address of first instruction after the last
270 prologue instruction; Note that there may
271 be instructions from the function's body
272 intermingled with the prologue. */
273 int mem_stack_frame_size;
274 /* Size of the memory stack frame (may be zero),
275 or -1 if it has not been determined yet. */
276 int fp_reg; /* Register number (if any) used a frame pointer
277 for this frame. 0 if no register is being used
278 as the frame pointer. */
280 /* Saved registers. */
281 CORE_ADDR saved_regs[NUM_IA64_RAW_REGS];
286 floatformat_valid (const struct floatformat *fmt, const void *from)
291 static const struct floatformat floatformat_ia64_ext_little =
293 floatformat_little, 82, 0, 1, 17, 65535, 0x1ffff, 18, 64,
294 floatformat_intbit_yes, "floatformat_ia64_ext_little", floatformat_valid, NULL
297 static const struct floatformat floatformat_ia64_ext_big =
299 floatformat_big, 82, 46, 47, 17, 65535, 0x1ffff, 64, 64,
300 floatformat_intbit_yes, "floatformat_ia64_ext_big", floatformat_valid
303 static const struct floatformat *floatformats_ia64_ext[2] =
305 &floatformat_ia64_ext_big,
306 &floatformat_ia64_ext_little
310 ia64_ext_type (struct gdbarch *gdbarch)
312 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
314 if (!tdep->ia64_ext_type)
316 = arch_float_type (gdbarch, 128, "builtin_type_ia64_ext",
317 floatformats_ia64_ext);
319 return tdep->ia64_ext_type;
323 ia64_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
324 struct reggroup *group)
329 if (group == all_reggroup)
331 vector_p = TYPE_VECTOR (register_type (gdbarch, regnum));
332 float_p = TYPE_CODE (register_type (gdbarch, regnum)) == TYPE_CODE_FLT;
333 raw_p = regnum < NUM_IA64_RAW_REGS;
334 if (group == float_reggroup)
336 if (group == vector_reggroup)
338 if (group == general_reggroup)
339 return (!vector_p && !float_p);
340 if (group == save_reggroup || group == restore_reggroup)
346 ia64_register_name (struct gdbarch *gdbarch, int reg)
348 return ia64_register_names[reg];
352 ia64_register_type (struct gdbarch *arch, int reg)
354 if (reg >= IA64_FR0_REGNUM && reg <= IA64_FR127_REGNUM)
355 return ia64_ext_type (arch);
357 return builtin_type (arch)->builtin_long;
361 ia64_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg)
363 if (reg >= IA64_GR32_REGNUM && reg <= IA64_GR127_REGNUM)
364 return V32_REGNUM + (reg - IA64_GR32_REGNUM);
369 /* Extract ``len'' bits from an instruction bundle starting at
373 extract_bit_field (const gdb_byte *bundle, int from, int len)
375 long long result = 0LL;
377 int from_byte = from / 8;
378 int to_byte = to / 8;
379 unsigned char *b = (unsigned char *) bundle;
385 if (from_byte == to_byte)
386 c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8);
387 result = c >> (from % 8);
388 lshift = 8 - (from % 8);
390 for (i = from_byte+1; i < to_byte; i++)
392 result |= ((long long) b[i]) << lshift;
396 if (from_byte < to_byte && (to % 8 != 0))
399 c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8);
400 result |= ((long long) c) << lshift;
406 /* Replace the specified bits in an instruction bundle. */
409 replace_bit_field (gdb_byte *bundle, long long val, int from, int len)
412 int from_byte = from / 8;
413 int to_byte = to / 8;
414 unsigned char *b = (unsigned char *) bundle;
417 if (from_byte == to_byte)
419 unsigned char left, right;
421 left = (c >> (to % 8)) << (to % 8);
422 right = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8);
423 c = (unsigned char) (val & 0xff);
424 c = (unsigned char) (c << (from % 8 + 8 - to % 8)) >> (8 - to % 8);
432 c = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8);
433 c = c | (val << (from % 8));
435 val >>= 8 - from % 8;
437 for (i = from_byte+1; i < to_byte; i++)
446 unsigned char cv = (unsigned char) val;
448 c = c >> (to % 8) << (to % 8);
449 c |= ((unsigned char) (cv << (8 - to % 8))) >> (8 - to % 8);
455 /* Return the contents of slot N (for N = 0, 1, or 2) in
456 and instruction bundle. */
459 slotN_contents (gdb_byte *bundle, int slotnum)
461 return extract_bit_field (bundle, 5+41*slotnum, 41);
464 /* Store an instruction in an instruction bundle. */
467 replace_slotN_contents (gdb_byte *bundle, long long instr, int slotnum)
469 replace_bit_field (bundle, instr, 5+41*slotnum, 41);
472 static const enum instruction_type template_encoding_table[32][3] =
474 { M, I, I }, /* 00 */
475 { M, I, I }, /* 01 */
476 { M, I, I }, /* 02 */
477 { M, I, I }, /* 03 */
478 { M, L, X }, /* 04 */
479 { M, L, X }, /* 05 */
480 { undefined, undefined, undefined }, /* 06 */
481 { undefined, undefined, undefined }, /* 07 */
482 { M, M, I }, /* 08 */
483 { M, M, I }, /* 09 */
484 { M, M, I }, /* 0A */
485 { M, M, I }, /* 0B */
486 { M, F, I }, /* 0C */
487 { M, F, I }, /* 0D */
488 { M, M, F }, /* 0E */
489 { M, M, F }, /* 0F */
490 { M, I, B }, /* 10 */
491 { M, I, B }, /* 11 */
492 { M, B, B }, /* 12 */
493 { M, B, B }, /* 13 */
494 { undefined, undefined, undefined }, /* 14 */
495 { undefined, undefined, undefined }, /* 15 */
496 { B, B, B }, /* 16 */
497 { B, B, B }, /* 17 */
498 { M, M, B }, /* 18 */
499 { M, M, B }, /* 19 */
500 { undefined, undefined, undefined }, /* 1A */
501 { undefined, undefined, undefined }, /* 1B */
502 { M, F, B }, /* 1C */
503 { M, F, B }, /* 1D */
504 { undefined, undefined, undefined }, /* 1E */
505 { undefined, undefined, undefined }, /* 1F */
508 /* Fetch and (partially) decode an instruction at ADDR and return the
509 address of the next instruction to fetch. */
512 fetch_instruction (CORE_ADDR addr, instruction_type *it, long long *instr)
514 gdb_byte bundle[BUNDLE_LEN];
515 int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER;
519 /* Warn about slot numbers greater than 2. We used to generate
520 an error here on the assumption that the user entered an invalid
521 address. But, sometimes GDB itself requests an invalid address.
522 This can (easily) happen when execution stops in a function for
523 which there are no symbols. The prologue scanner will attempt to
524 find the beginning of the function - if the nearest symbol
525 happens to not be aligned on a bundle boundary (16 bytes), the
526 resulting starting address will cause GDB to think that the slot
529 So we warn about it and set the slot number to zero. It is
530 not necessarily a fatal condition, particularly if debugging
531 at the assembly language level. */
534 warning (_("Can't fetch instructions for slot numbers greater than 2.\n"
535 "Using slot 0 instead"));
541 val = target_read_memory (addr, bundle, BUNDLE_LEN);
546 *instr = slotN_contents (bundle, slotnum);
547 template = extract_bit_field (bundle, 0, 5);
548 *it = template_encoding_table[(int)template][slotnum];
550 if (slotnum == 2 || (slotnum == 1 && *it == L))
553 addr += (slotnum + 1) * SLOT_MULTIPLIER;
558 /* There are 5 different break instructions (break.i, break.b,
559 break.m, break.f, and break.x), but they all have the same
560 encoding. (The five bit template in the low five bits of the
561 instruction bundle distinguishes one from another.)
563 The runtime architecture manual specifies that break instructions
564 used for debugging purposes must have the upper two bits of the 21
565 bit immediate set to a 0 and a 1 respectively. A breakpoint
566 instruction encodes the most significant bit of its 21 bit
567 immediate at bit 36 of the 41 bit instruction. The penultimate msb
568 is at bit 25 which leads to the pattern below.
570 Originally, I had this set up to do, e.g, a "break.i 0x80000" But
571 it turns out that 0x80000 was used as the syscall break in the early
572 simulators. So I changed the pattern slightly to do "break.i 0x080001"
573 instead. But that didn't work either (I later found out that this
574 pattern was used by the simulator that I was using.) So I ended up
575 using the pattern seen below.
577 SHADOW_CONTENTS has byte-based addressing (PLACED_ADDRESS and SHADOW_LEN)
578 while we need bit-based addressing as the instructions length is 41 bits and
579 we must not modify/corrupt the adjacent slots in the same bundle.
580 Fortunately we may store larger memory incl. the adjacent bits with the
581 original memory content (not the possibly already stored breakpoints there).
582 We need to be careful in ia64_memory_remove_breakpoint to always restore
583 only the specific bits of this instruction ignoring any adjacent stored
586 We use the original addressing with the low nibble in the range <0..2> which
587 gets incorrectly interpreted by generic non-ia64 breakpoint_restore_shadows
588 as the direct byte offset of SHADOW_CONTENTS. We store whole BUNDLE_LEN
589 bytes just without these two possibly skipped bytes to not to exceed to the
592 If we would like to store the whole bundle to SHADOW_CONTENTS we would have
593 to store already the base address (`address & ~0x0f') into PLACED_ADDRESS.
594 In such case there is no other place where to store
595 SLOTNUM (`adress & 0x0f', value in the range <0..2>). We need to know
596 SLOTNUM in ia64_memory_remove_breakpoint.
598 There is one special case where we need to be extra careful:
599 L-X instructions, which are instructions that occupy 2 slots
600 (The L part is always in slot 1, and the X part is always in
601 slot 2). We must refuse to insert breakpoints for an address
602 that points at slot 2 of a bundle where an L-X instruction is
603 present, since there is logically no instruction at that address.
604 However, to make things more interesting, the opcode of L-X
605 instructions is located in slot 2. This means that, to insert
606 a breakpoint at an address that points to slot 1, we actually
607 need to write the breakpoint in slot 2! Slot 1 is actually
608 the extended operand, so writing the breakpoint there would not
609 have the desired effect. Another side-effect of this issue
610 is that we need to make sure that the shadow contents buffer
611 does save byte 15 of our instruction bundle (this is the tail
612 end of slot 2, which wouldn't be saved if we were to insert
613 the breakpoint in slot 1).
615 ia64 16-byte bundle layout:
616 | 5 bits | slot 0 with 41 bits | slot 1 with 41 bits | slot 2 with 41 bits |
618 The current addressing used by the code below:
619 original PC placed_address placed_size required covered
620 == bp_tgt->shadow_len reqd \subset covered
621 0xABCDE0 0xABCDE0 0x10 <0x0...0x5> <0x0..0xF>
622 0xABCDE1 0xABCDE1 0xF <0x5...0xA> <0x1..0xF>
623 0xABCDE2 0xABCDE2 0xE <0xA...0xF> <0x2..0xF>
625 L-X instructions are treated a little specially, as explained above:
626 0xABCDE1 0xABCDE1 0xF <0xA...0xF> <0x1..0xF>
628 `objdump -d' and some other tools show a bit unjustified offsets:
629 original PC byte where starts the instruction objdump offset
630 0xABCDE0 0xABCDE0 0xABCDE0
631 0xABCDE1 0xABCDE5 0xABCDE6
632 0xABCDE2 0xABCDEA 0xABCDEC
635 #define IA64_BREAKPOINT 0x00003333300LL
638 ia64_memory_insert_breakpoint (struct gdbarch *gdbarch,
639 struct bp_target_info *bp_tgt)
641 CORE_ADDR addr = bp_tgt->placed_address;
642 gdb_byte bundle[BUNDLE_LEN];
643 int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER, shadow_slotnum;
644 long long instr_breakpoint;
647 struct cleanup *cleanup;
650 error (_("Can't insert breakpoint for slot numbers greater than 2."));
654 /* Enable the automatic memory restoration from breakpoints while
655 we read our instruction bundle for the purpose of SHADOW_CONTENTS.
656 Otherwise, we could possibly store into the shadow parts of the adjacent
657 placed breakpoints. It is due to our SHADOW_CONTENTS overlapping the real
658 breakpoint instruction bits region. */
659 cleanup = make_show_memory_breakpoints_cleanup (0);
660 val = target_read_memory (addr, bundle, BUNDLE_LEN);
663 do_cleanups (cleanup);
667 /* SHADOW_SLOTNUM saves the original slot number as expected by the caller
668 for addressing the SHADOW_CONTENTS placement. */
669 shadow_slotnum = slotnum;
671 /* Always cover the last byte of the bundle in case we are inserting
672 a breakpoint on an L-X instruction. */
673 bp_tgt->shadow_len = BUNDLE_LEN - shadow_slotnum;
675 template = extract_bit_field (bundle, 0, 5);
676 if (template_encoding_table[template][slotnum] == X)
678 /* X unit types can only be used in slot 2, and are actually
679 part of a 2-slot L-X instruction. We cannot break at this
680 address, as this is the second half of an instruction that
681 lives in slot 1 of that bundle. */
682 gdb_assert (slotnum == 2);
683 error (_("Can't insert breakpoint for non-existing slot X"));
685 if (template_encoding_table[template][slotnum] == L)
687 /* L unit types can only be used in slot 1. But the associated
688 opcode for that instruction is in slot 2, so bump the slot number
690 gdb_assert (slotnum == 1);
694 /* Store the whole bundle, except for the initial skipped bytes by the slot
695 number interpreted as bytes offset in PLACED_ADDRESS. */
696 memcpy (bp_tgt->shadow_contents, bundle + shadow_slotnum,
699 /* Re-read the same bundle as above except that, this time, read it in order
700 to compute the new bundle inside which we will be inserting the
701 breakpoint. Therefore, disable the automatic memory restoration from
702 breakpoints while we read our instruction bundle. Otherwise, the general
703 restoration mechanism kicks in and we would possibly remove parts of the
704 adjacent placed breakpoints. It is due to our SHADOW_CONTENTS overlapping
705 the real breakpoint instruction bits region. */
706 make_show_memory_breakpoints_cleanup (1);
707 val = target_read_memory (addr, bundle, BUNDLE_LEN);
710 do_cleanups (cleanup);
714 /* Breakpoints already present in the code will get deteacted and not get
715 reinserted by bp_loc_is_permanent. Multiple breakpoints at the same
716 location cannot induce the internal error as they are optimized into
717 a single instance by update_global_location_list. */
718 instr_breakpoint = slotN_contents (bundle, slotnum);
719 if (instr_breakpoint == IA64_BREAKPOINT)
720 internal_error (__FILE__, __LINE__,
721 _("Address %s already contains a breakpoint."),
722 paddress (gdbarch, bp_tgt->placed_address));
723 replace_slotN_contents (bundle, IA64_BREAKPOINT, slotnum);
725 bp_tgt->placed_size = bp_tgt->shadow_len;
727 val = target_write_memory (addr + shadow_slotnum, bundle + shadow_slotnum,
730 do_cleanups (cleanup);
735 ia64_memory_remove_breakpoint (struct gdbarch *gdbarch,
736 struct bp_target_info *bp_tgt)
738 CORE_ADDR addr = bp_tgt->placed_address;
739 gdb_byte bundle_mem[BUNDLE_LEN], bundle_saved[BUNDLE_LEN];
740 int slotnum = (addr & 0x0f) / SLOT_MULTIPLIER, shadow_slotnum;
741 long long instr_breakpoint, instr_saved;
744 struct cleanup *cleanup;
748 /* Disable the automatic memory restoration from breakpoints while
749 we read our instruction bundle. Otherwise, the general restoration
750 mechanism kicks in and we would possibly remove parts of the adjacent
751 placed breakpoints. It is due to our SHADOW_CONTENTS overlapping the real
752 breakpoint instruction bits region. */
753 cleanup = make_show_memory_breakpoints_cleanup (1);
754 val = target_read_memory (addr, bundle_mem, BUNDLE_LEN);
757 do_cleanups (cleanup);
761 /* SHADOW_SLOTNUM saves the original slot number as expected by the caller
762 for addressing the SHADOW_CONTENTS placement. */
763 shadow_slotnum = slotnum;
765 template = extract_bit_field (bundle_mem, 0, 5);
766 if (template_encoding_table[template][slotnum] == X)
768 /* X unit types can only be used in slot 2, and are actually
769 part of a 2-slot L-X instruction. We refuse to insert
770 breakpoints at this address, so there should be no reason
771 for us attempting to remove one there, except if the program's
772 code somehow got modified in memory. */
773 gdb_assert (slotnum == 2);
774 warning (_("Cannot remove breakpoint at address %s from non-existing "
775 "X-type slot, memory has changed underneath"),
776 paddress (gdbarch, bp_tgt->placed_address));
777 do_cleanups (cleanup);
780 if (template_encoding_table[template][slotnum] == L)
782 /* L unit types can only be used in slot 1. But the breakpoint
783 was actually saved using slot 2, so update the slot number
785 gdb_assert (slotnum == 1);
789 gdb_assert (bp_tgt->placed_size == BUNDLE_LEN - shadow_slotnum);
790 gdb_assert (bp_tgt->placed_size == bp_tgt->shadow_len);
792 instr_breakpoint = slotN_contents (bundle_mem, slotnum);
793 if (instr_breakpoint != IA64_BREAKPOINT)
795 warning (_("Cannot remove breakpoint at address %s, "
796 "no break instruction at such address."),
797 paddress (gdbarch, bp_tgt->placed_address));
798 do_cleanups (cleanup);
802 /* Extract the original saved instruction from SLOTNUM normalizing its
803 bit-shift for INSTR_SAVED. */
804 memcpy (bundle_saved, bundle_mem, BUNDLE_LEN);
805 memcpy (bundle_saved + shadow_slotnum, bp_tgt->shadow_contents,
807 instr_saved = slotN_contents (bundle_saved, slotnum);
809 /* In BUNDLE_MEM, be careful to modify only the bits belonging to SLOTNUM
810 and not any of the other ones that are stored in SHADOW_CONTENTS. */
811 replace_slotN_contents (bundle_mem, instr_saved, slotnum);
812 val = target_write_raw_memory (addr, bundle_mem, BUNDLE_LEN);
814 do_cleanups (cleanup);
818 /* As gdbarch_breakpoint_from_pc ranges have byte granularity and ia64
819 instruction slots ranges are bit-granular (41 bits) we have to provide an
820 extended range as described for ia64_memory_insert_breakpoint. We also take
821 care of preserving the `break' instruction 21-bit (or 62-bit) parameter to
822 make a match for permanent breakpoints. */
824 static const gdb_byte *
825 ia64_breakpoint_from_pc (struct gdbarch *gdbarch,
826 CORE_ADDR *pcptr, int *lenptr)
828 CORE_ADDR addr = *pcptr;
829 static gdb_byte bundle[BUNDLE_LEN];
830 int slotnum = (int) (*pcptr & 0x0f) / SLOT_MULTIPLIER, shadow_slotnum;
831 long long instr_fetched;
834 struct cleanup *cleanup;
837 error (_("Can't insert breakpoint for slot numbers greater than 2."));
841 /* Enable the automatic memory restoration from breakpoints while
842 we read our instruction bundle to match bp_loc_is_permanent. */
843 cleanup = make_show_memory_breakpoints_cleanup (0);
844 val = target_read_memory (addr, bundle, BUNDLE_LEN);
845 do_cleanups (cleanup);
847 /* The memory might be unreachable. This can happen, for instance,
848 when the user inserts a breakpoint at an invalid address. */
852 /* SHADOW_SLOTNUM saves the original slot number as expected by the caller
853 for addressing the SHADOW_CONTENTS placement. */
854 shadow_slotnum = slotnum;
856 /* Cover always the last byte of the bundle for the L-X slot case. */
857 *lenptr = BUNDLE_LEN - shadow_slotnum;
859 /* Check for L type instruction in slot 1, if present then bump up the slot
860 number to the slot 2. */
861 template = extract_bit_field (bundle, 0, 5);
862 if (template_encoding_table[template][slotnum] == X)
864 gdb_assert (slotnum == 2);
865 error (_("Can't insert breakpoint for non-existing slot X"));
867 if (template_encoding_table[template][slotnum] == L)
869 gdb_assert (slotnum == 1);
873 /* A break instruction has its all its opcode bits cleared except for
874 the parameter value. For L+X slot pair we are at the X slot (slot 2) so
875 we should not touch the L slot - the upper 41 bits of the parameter. */
876 instr_fetched = slotN_contents (bundle, slotnum);
877 instr_fetched &= 0x1003ffffc0LL;
878 replace_slotN_contents (bundle, instr_fetched, slotnum);
880 return bundle + shadow_slotnum;
884 ia64_read_pc (struct regcache *regcache)
886 ULONGEST psr_value, pc_value;
889 regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr_value);
890 regcache_cooked_read_unsigned (regcache, IA64_IP_REGNUM, &pc_value);
891 slot_num = (psr_value >> 41) & 3;
893 return pc_value | (slot_num * SLOT_MULTIPLIER);
897 ia64_write_pc (struct regcache *regcache, CORE_ADDR new_pc)
899 int slot_num = (int) (new_pc & 0xf) / SLOT_MULTIPLIER;
902 regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr_value);
903 psr_value &= ~(3LL << 41);
904 psr_value |= (ULONGEST)(slot_num & 0x3) << 41;
908 regcache_cooked_write_unsigned (regcache, IA64_PSR_REGNUM, psr_value);
909 regcache_cooked_write_unsigned (regcache, IA64_IP_REGNUM, new_pc);
912 #define IS_NaT_COLLECTION_ADDR(addr) ((((addr) >> 3) & 0x3f) == 0x3f)
914 /* Returns the address of the slot that's NSLOTS slots away from
915 the address ADDR. NSLOTS may be positive or negative. */
917 rse_address_add(CORE_ADDR addr, int nslots)
920 int mandatory_nat_slots = nslots / 63;
921 int direction = nslots < 0 ? -1 : 1;
923 new_addr = addr + 8 * (nslots + mandatory_nat_slots);
925 if ((new_addr >> 9) != ((addr + 8 * 64 * mandatory_nat_slots) >> 9))
926 new_addr += 8 * direction;
928 if (IS_NaT_COLLECTION_ADDR(new_addr))
929 new_addr += 8 * direction;
934 static enum register_status
935 ia64_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
936 int regnum, gdb_byte *buf)
938 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
939 enum register_status status;
941 if (regnum >= V32_REGNUM && regnum <= V127_REGNUM)
943 #ifdef HAVE_LIBUNWIND_IA64_H
944 /* First try and use the libunwind special reg accessor,
945 otherwise fallback to standard logic. */
946 if (!libunwind_is_initialized ()
947 || libunwind_get_reg_special (gdbarch, regcache, regnum, buf) != 0)
950 /* The fallback position is to assume that r32-r127 are
951 found sequentially in memory starting at $bof. This
952 isn't always true, but without libunwind, this is the
954 enum register_status status;
959 status = regcache_cooked_read_unsigned (regcache,
960 IA64_BSP_REGNUM, &bsp);
961 if (status != REG_VALID)
964 status = regcache_cooked_read_unsigned (regcache,
965 IA64_CFM_REGNUM, &cfm);
966 if (status != REG_VALID)
969 /* The bsp points at the end of the register frame so we
970 subtract the size of frame from it to get start of
972 bsp = rse_address_add (bsp, -(cfm & 0x7f));
974 if ((cfm & 0x7f) > regnum - V32_REGNUM)
976 ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
977 reg = read_memory_integer ((CORE_ADDR)reg_addr, 8, byte_order);
978 store_unsigned_integer (buf, register_size (gdbarch, regnum),
982 store_unsigned_integer (buf, register_size (gdbarch, regnum),
986 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
990 status = regcache_cooked_read_unsigned (regcache, IA64_UNAT_REGNUM, &unat);
991 if (status != REG_VALID)
993 unatN_val = (unat & (1LL << (regnum - IA64_NAT0_REGNUM))) != 0;
994 store_unsigned_integer (buf, register_size (gdbarch, regnum),
995 byte_order, unatN_val);
997 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
999 ULONGEST natN_val = 0;
1002 CORE_ADDR gr_addr = 0;
1003 status = regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
1004 if (status != REG_VALID)
1006 status = regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1007 if (status != REG_VALID)
1010 /* The bsp points at the end of the register frame so we
1011 subtract the size of frame from it to get start of register frame. */
1012 bsp = rse_address_add (bsp, -(cfm & 0x7f));
1014 if ((cfm & 0x7f) > regnum - V32_REGNUM)
1015 gr_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
1019 /* Compute address of nat collection bits. */
1020 CORE_ADDR nat_addr = gr_addr | 0x1f8;
1021 CORE_ADDR nat_collection;
1023 /* If our nat collection address is bigger than bsp, we have to get
1024 the nat collection from rnat. Otherwise, we fetch the nat
1025 collection from the computed address. */
1026 if (nat_addr >= bsp)
1027 regcache_cooked_read_unsigned (regcache, IA64_RNAT_REGNUM,
1030 nat_collection = read_memory_integer (nat_addr, 8, byte_order);
1031 nat_bit = (gr_addr >> 3) & 0x3f;
1032 natN_val = (nat_collection >> nat_bit) & 1;
1035 store_unsigned_integer (buf, register_size (gdbarch, regnum),
1036 byte_order, natN_val);
1038 else if (regnum == VBOF_REGNUM)
1040 /* A virtual register frame start is provided for user convenience.
1041 It can be calculated as the bsp - sof (sizeof frame). */
1044 status = regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
1045 if (status != REG_VALID)
1047 status = regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1048 if (status != REG_VALID)
1051 /* The bsp points at the end of the register frame so we
1052 subtract the size of frame from it to get beginning of frame. */
1053 vbsp = rse_address_add (bsp, -(cfm & 0x7f));
1054 store_unsigned_integer (buf, register_size (gdbarch, regnum),
1057 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
1062 status = regcache_cooked_read_unsigned (regcache, IA64_PR_REGNUM, &pr);
1063 if (status != REG_VALID)
1065 status = regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1066 if (status != REG_VALID)
1069 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
1071 /* Fetch predicate register rename base from current frame
1072 marker for this frame. */
1073 int rrb_pr = (cfm >> 32) & 0x3f;
1075 /* Adjust the register number to account for register rotation. */
1076 regnum = VP16_REGNUM
1077 + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
1079 prN_val = (pr & (1LL << (regnum - VP0_REGNUM))) != 0;
1080 store_unsigned_integer (buf, register_size (gdbarch, regnum),
1081 byte_order, prN_val);
1084 memset (buf, 0, register_size (gdbarch, regnum));
1090 ia64_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
1091 int regnum, const gdb_byte *buf)
1093 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1095 if (regnum >= V32_REGNUM && regnum <= V127_REGNUM)
1099 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
1100 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1102 bsp = rse_address_add (bsp, -(cfm & 0x7f));
1104 if ((cfm & 0x7f) > regnum - V32_REGNUM)
1106 ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
1107 write_memory (reg_addr, (void *) buf, 8);
1110 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
1112 ULONGEST unatN_val, unat, unatN_mask;
1113 regcache_cooked_read_unsigned (regcache, IA64_UNAT_REGNUM, &unat);
1114 unatN_val = extract_unsigned_integer (buf, register_size (gdbarch,
1117 unatN_mask = (1LL << (regnum - IA64_NAT0_REGNUM));
1119 unat &= ~unatN_mask;
1120 else if (unatN_val == 1)
1122 regcache_cooked_write_unsigned (regcache, IA64_UNAT_REGNUM, unat);
1124 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
1129 CORE_ADDR gr_addr = 0;
1130 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
1131 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1133 /* The bsp points at the end of the register frame so we
1134 subtract the size of frame from it to get start of register frame. */
1135 bsp = rse_address_add (bsp, -(cfm & 0x7f));
1137 if ((cfm & 0x7f) > regnum - V32_REGNUM)
1138 gr_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
1140 natN_val = extract_unsigned_integer (buf, register_size (gdbarch,
1144 if (gr_addr != 0 && (natN_val == 0 || natN_val == 1))
1146 /* Compute address of nat collection bits. */
1147 CORE_ADDR nat_addr = gr_addr | 0x1f8;
1148 CORE_ADDR nat_collection;
1149 int natN_bit = (gr_addr >> 3) & 0x3f;
1150 ULONGEST natN_mask = (1LL << natN_bit);
1151 /* If our nat collection address is bigger than bsp, we have to get
1152 the nat collection from rnat. Otherwise, we fetch the nat
1153 collection from the computed address. */
1154 if (nat_addr >= bsp)
1156 regcache_cooked_read_unsigned (regcache,
1160 nat_collection |= natN_mask;
1162 nat_collection &= ~natN_mask;
1163 regcache_cooked_write_unsigned (regcache, IA64_RNAT_REGNUM,
1168 gdb_byte nat_buf[8];
1169 nat_collection = read_memory_integer (nat_addr, 8, byte_order);
1171 nat_collection |= natN_mask;
1173 nat_collection &= ~natN_mask;
1174 store_unsigned_integer (nat_buf, register_size (gdbarch, regnum),
1175 byte_order, nat_collection);
1176 write_memory (nat_addr, nat_buf, 8);
1180 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
1187 regcache_cooked_read_unsigned (regcache, IA64_PR_REGNUM, &pr);
1188 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1190 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
1192 /* Fetch predicate register rename base from current frame
1193 marker for this frame. */
1194 int rrb_pr = (cfm >> 32) & 0x3f;
1196 /* Adjust the register number to account for register rotation. */
1197 regnum = VP16_REGNUM
1198 + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
1200 prN_val = extract_unsigned_integer (buf, register_size (gdbarch, regnum),
1202 prN_mask = (1LL << (regnum - VP0_REGNUM));
1205 else if (prN_val == 1)
1207 regcache_cooked_write_unsigned (regcache, IA64_PR_REGNUM, pr);
1211 /* The ia64 needs to convert between various ieee floating-point formats
1212 and the special ia64 floating point register format. */
1215 ia64_convert_register_p (struct gdbarch *gdbarch, int regno, struct type *type)
1217 return (regno >= IA64_FR0_REGNUM && regno <= IA64_FR127_REGNUM
1218 && type != ia64_ext_type (gdbarch));
1222 ia64_register_to_value (struct frame_info *frame, int regnum,
1223 struct type *valtype, gdb_byte *out,
1224 int *optimizedp, int *unavailablep)
1226 struct gdbarch *gdbarch = get_frame_arch (frame);
1227 gdb_byte in[MAX_REGISTER_SIZE];
1229 /* Convert to TYPE. */
1230 if (!get_frame_register_bytes (frame, regnum, 0,
1231 register_size (gdbarch, regnum),
1232 in, optimizedp, unavailablep))
1235 convert_typed_floating (in, ia64_ext_type (gdbarch), out, valtype);
1236 *optimizedp = *unavailablep = 0;
1241 ia64_value_to_register (struct frame_info *frame, int regnum,
1242 struct type *valtype, const gdb_byte *in)
1244 struct gdbarch *gdbarch = get_frame_arch (frame);
1245 gdb_byte out[MAX_REGISTER_SIZE];
1246 convert_typed_floating (in, valtype, out, ia64_ext_type (gdbarch));
1247 put_frame_register (frame, regnum, out);
1251 /* Limit the number of skipped non-prologue instructions since examining
1252 of the prologue is expensive. */
1253 static int max_skip_non_prologue_insns = 40;
1255 /* Given PC representing the starting address of a function, and
1256 LIM_PC which is the (sloppy) limit to which to scan when looking
1257 for a prologue, attempt to further refine this limit by using
1258 the line data in the symbol table. If successful, a better guess
1259 on where the prologue ends is returned, otherwise the previous
1260 value of lim_pc is returned. TRUST_LIMIT is a pointer to a flag
1261 which will be set to indicate whether the returned limit may be
1262 used with no further scanning in the event that the function is
1265 /* FIXME: cagney/2004-02-14: This function and logic have largely been
1266 superseded by skip_prologue_using_sal. */
1269 refine_prologue_limit (CORE_ADDR pc, CORE_ADDR lim_pc, int *trust_limit)
1271 struct symtab_and_line prologue_sal;
1272 CORE_ADDR start_pc = pc;
1275 /* The prologue can not possibly go past the function end itself,
1276 so we can already adjust LIM_PC accordingly. */
1277 if (find_pc_partial_function (pc, NULL, NULL, &end_pc) && end_pc < lim_pc)
1280 /* Start off not trusting the limit. */
1283 prologue_sal = find_pc_line (pc, 0);
1284 if (prologue_sal.line != 0)
1287 CORE_ADDR addr = prologue_sal.end;
1289 /* Handle the case in which compiler's optimizer/scheduler
1290 has moved instructions into the prologue. We scan ahead
1291 in the function looking for address ranges whose corresponding
1292 line number is less than or equal to the first one that we
1293 found for the function. (It can be less than when the
1294 scheduler puts a body instruction before the first prologue
1296 for (i = 2 * max_skip_non_prologue_insns;
1297 i > 0 && (lim_pc == 0 || addr < lim_pc);
1300 struct symtab_and_line sal;
1302 sal = find_pc_line (addr, 0);
1305 if (sal.line <= prologue_sal.line
1306 && sal.symtab == prologue_sal.symtab)
1313 if (lim_pc == 0 || prologue_sal.end < lim_pc)
1315 lim_pc = prologue_sal.end;
1316 if (start_pc == get_pc_function_start (lim_pc))
1323 #define isScratch(_regnum_) ((_regnum_) == 2 || (_regnum_) == 3 \
1324 || (8 <= (_regnum_) && (_regnum_) <= 11) \
1325 || (14 <= (_regnum_) && (_regnum_) <= 31))
1326 #define imm9(_instr_) \
1327 ( ((((_instr_) & 0x01000000000LL) ? -1 : 0) << 8) \
1328 | (((_instr_) & 0x00008000000LL) >> 20) \
1329 | (((_instr_) & 0x00000001fc0LL) >> 6))
1331 /* Allocate and initialize a frame cache. */
1333 static struct ia64_frame_cache *
1334 ia64_alloc_frame_cache (void)
1336 struct ia64_frame_cache *cache;
1339 cache = FRAME_OBSTACK_ZALLOC (struct ia64_frame_cache);
1345 cache->prev_cfm = 0;
1351 cache->frameless = 1;
1353 for (i = 0; i < NUM_IA64_RAW_REGS; i++)
1354 cache->saved_regs[i] = 0;
1360 examine_prologue (CORE_ADDR pc, CORE_ADDR lim_pc,
1361 struct frame_info *this_frame,
1362 struct ia64_frame_cache *cache)
1365 CORE_ADDR last_prologue_pc = pc;
1366 instruction_type it;
1371 int unat_save_reg = 0;
1372 int pr_save_reg = 0;
1373 int mem_stack_frame_size = 0;
1375 CORE_ADDR spill_addr = 0;
1378 char reg_contents[256];
1384 CORE_ADDR bof, sor, sol, sof, cfm, rrb_gr;
1386 memset (instores, 0, sizeof instores);
1387 memset (infpstores, 0, sizeof infpstores);
1388 memset (reg_contents, 0, sizeof reg_contents);
1390 if (cache->after_prologue != 0
1391 && cache->after_prologue <= lim_pc)
1392 return cache->after_prologue;
1394 lim_pc = refine_prologue_limit (pc, lim_pc, &trust_limit);
1395 next_pc = fetch_instruction (pc, &it, &instr);
1397 /* We want to check if we have a recognizable function start before we
1398 look ahead for a prologue. */
1399 if (pc < lim_pc && next_pc
1400 && it == M && ((instr & 0x1ee0000003fLL) == 0x02c00000000LL))
1402 /* alloc - start of a regular function. */
1403 int sor = (int) ((instr & 0x00078000000LL) >> 27);
1404 int sol = (int) ((instr & 0x00007f00000LL) >> 20);
1405 int sof = (int) ((instr & 0x000000fe000LL) >> 13);
1406 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1408 /* Verify that the current cfm matches what we think is the
1409 function start. If we have somehow jumped within a function,
1410 we do not want to interpret the prologue and calculate the
1411 addresses of various registers such as the return address.
1412 We will instead treat the frame as frameless. */
1414 (sof == (cache->cfm & 0x7f) &&
1415 sol == ((cache->cfm >> 7) & 0x7f)))
1419 last_prologue_pc = next_pc;
1424 /* Look for a leaf routine. */
1425 if (pc < lim_pc && next_pc
1426 && (it == I || it == M)
1427 && ((instr & 0x1ee00000000LL) == 0x10800000000LL))
1429 /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */
1430 int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13)
1431 | ((instr & 0x001f8000000LL) >> 20)
1432 | ((instr & 0x000000fe000LL) >> 13));
1433 int rM = (int) ((instr & 0x00007f00000LL) >> 20);
1434 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1435 int qp = (int) (instr & 0x0000000003fLL);
1436 if (qp == 0 && rN == 2 && imm == 0 && rM == 12 && fp_reg == 0)
1438 /* mov r2, r12 - beginning of leaf routine. */
1440 last_prologue_pc = next_pc;
1444 /* If we don't recognize a regular function or leaf routine, we are
1450 last_prologue_pc = lim_pc;
1454 /* Loop, looking for prologue instructions, keeping track of
1455 where preserved registers were spilled. */
1458 next_pc = fetch_instruction (pc, &it, &instr);
1462 if (it == B && ((instr & 0x1e1f800003fLL) != 0x04000000000LL))
1464 /* Exit loop upon hitting a non-nop branch instruction. */
1469 else if (((instr & 0x3fLL) != 0LL) &&
1470 (frameless || ret_reg != 0))
1472 /* Exit loop upon hitting a predicated instruction if
1473 we already have the return register or if we are frameless. */
1478 else if (it == I && ((instr & 0x1eff8000000LL) == 0x00188000000LL))
1481 int b2 = (int) ((instr & 0x0000000e000LL) >> 13);
1482 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1483 int qp = (int) (instr & 0x0000000003f);
1485 if (qp == 0 && b2 == 0 && rN >= 32 && ret_reg == 0)
1488 last_prologue_pc = next_pc;
1491 else if ((it == I || it == M)
1492 && ((instr & 0x1ee00000000LL) == 0x10800000000LL))
1494 /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */
1495 int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13)
1496 | ((instr & 0x001f8000000LL) >> 20)
1497 | ((instr & 0x000000fe000LL) >> 13));
1498 int rM = (int) ((instr & 0x00007f00000LL) >> 20);
1499 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1500 int qp = (int) (instr & 0x0000000003fLL);
1502 if (qp == 0 && rN >= 32 && imm == 0 && rM == 12 && fp_reg == 0)
1506 last_prologue_pc = next_pc;
1508 else if (qp == 0 && rN == 12 && rM == 12)
1510 /* adds r12, -mem_stack_frame_size, r12 */
1511 mem_stack_frame_size -= imm;
1512 last_prologue_pc = next_pc;
1514 else if (qp == 0 && rN == 2
1515 && ((rM == fp_reg && fp_reg != 0) || rM == 12))
1517 gdb_byte buf[MAX_REGISTER_SIZE];
1518 CORE_ADDR saved_sp = 0;
1519 /* adds r2, spilloffset, rFramePointer
1521 adds r2, spilloffset, r12
1523 Get ready for stf.spill or st8.spill instructions.
1524 The address to start spilling at is loaded into r2.
1525 FIXME: Why r2? That's what gcc currently uses; it
1526 could well be different for other compilers. */
1528 /* Hmm... whether or not this will work will depend on
1529 where the pc is. If it's still early in the prologue
1530 this'll be wrong. FIXME */
1533 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1534 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1535 get_frame_register (this_frame, sp_regnum, buf);
1536 saved_sp = extract_unsigned_integer (buf, 8, byte_order);
1538 spill_addr = saved_sp
1539 + (rM == 12 ? 0 : mem_stack_frame_size)
1542 last_prologue_pc = next_pc;
1544 else if (qp == 0 && rM >= 32 && rM < 40 && !instores[rM-32] &&
1545 rN < 256 && imm == 0)
1547 /* mov rN, rM where rM is an input register. */
1548 reg_contents[rN] = rM;
1549 last_prologue_pc = next_pc;
1551 else if (frameless && qp == 0 && rN == fp_reg && imm == 0 &&
1555 last_prologue_pc = next_pc;
1560 && ( ((instr & 0x1efc0000000LL) == 0x0eec0000000LL)
1561 || ((instr & 0x1ffc8000000LL) == 0x0cec0000000LL) ))
1563 /* stf.spill [rN] = fM, imm9
1565 stf.spill [rN] = fM */
1567 int imm = imm9(instr);
1568 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1569 int fM = (int) ((instr & 0x000000fe000LL) >> 13);
1570 int qp = (int) (instr & 0x0000000003fLL);
1571 if (qp == 0 && rN == spill_reg && spill_addr != 0
1572 && ((2 <= fM && fM <= 5) || (16 <= fM && fM <= 31)))
1574 cache->saved_regs[IA64_FR0_REGNUM + fM] = spill_addr;
1576 if ((instr & 0x1efc0000000LL) == 0x0eec0000000LL)
1579 spill_addr = 0; /* last one; must be done. */
1580 last_prologue_pc = next_pc;
1583 else if ((it == M && ((instr & 0x1eff8000000LL) == 0x02110000000LL))
1584 || (it == I && ((instr & 0x1eff8000000LL) == 0x00050000000LL)) )
1590 int arM = (int) ((instr & 0x00007f00000LL) >> 20);
1591 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1592 int qp = (int) (instr & 0x0000000003fLL);
1593 if (qp == 0 && isScratch (rN) && arM == 36 /* ar.unat */)
1595 /* We have something like "mov.m r3 = ar.unat". Remember the
1596 r3 (or whatever) and watch for a store of this register... */
1598 last_prologue_pc = next_pc;
1601 else if (it == I && ((instr & 0x1eff8000000LL) == 0x00198000000LL))
1604 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1605 int qp = (int) (instr & 0x0000000003fLL);
1606 if (qp == 0 && isScratch (rN))
1609 last_prologue_pc = next_pc;
1613 && ( ((instr & 0x1ffc8000000LL) == 0x08cc0000000LL)
1614 || ((instr & 0x1efc0000000LL) == 0x0acc0000000LL)))
1618 st8 [rN] = rM, imm9 */
1619 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1620 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1621 int qp = (int) (instr & 0x0000000003fLL);
1622 int indirect = rM < 256 ? reg_contents[rM] : 0;
1623 if (qp == 0 && rN == spill_reg && spill_addr != 0
1624 && (rM == unat_save_reg || rM == pr_save_reg))
1626 /* We've found a spill of either the UNAT register or the PR
1627 register. (Well, not exactly; what we've actually found is
1628 a spill of the register that UNAT or PR was moved to).
1629 Record that fact and move on... */
1630 if (rM == unat_save_reg)
1632 /* Track UNAT register. */
1633 cache->saved_regs[IA64_UNAT_REGNUM] = spill_addr;
1638 /* Track PR register. */
1639 cache->saved_regs[IA64_PR_REGNUM] = spill_addr;
1642 if ((instr & 0x1efc0000000LL) == 0x0acc0000000LL)
1643 /* st8 [rN] = rM, imm9 */
1644 spill_addr += imm9(instr);
1646 spill_addr = 0; /* Must be done spilling. */
1647 last_prologue_pc = next_pc;
1649 else if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32])
1651 /* Allow up to one store of each input register. */
1652 instores[rM-32] = 1;
1653 last_prologue_pc = next_pc;
1655 else if (qp == 0 && 32 <= indirect && indirect < 40 &&
1656 !instores[indirect-32])
1658 /* Allow an indirect store of an input register. */
1659 instores[indirect-32] = 1;
1660 last_prologue_pc = next_pc;
1663 else if (it == M && ((instr & 0x1ff08000000LL) == 0x08c00000000LL))
1670 Note that the st8 case is handled in the clause above.
1672 Advance over stores of input registers. One store per input
1673 register is permitted. */
1674 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1675 int qp = (int) (instr & 0x0000000003fLL);
1676 int indirect = rM < 256 ? reg_contents[rM] : 0;
1677 if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32])
1679 instores[rM-32] = 1;
1680 last_prologue_pc = next_pc;
1682 else if (qp == 0 && 32 <= indirect && indirect < 40 &&
1683 !instores[indirect-32])
1685 /* Allow an indirect store of an input register. */
1686 instores[indirect-32] = 1;
1687 last_prologue_pc = next_pc;
1690 else if (it == M && ((instr & 0x1ff88000000LL) == 0x0cc80000000LL))
1697 Advance over stores of floating point input registers. Again
1698 one store per register is permitted. */
1699 int fM = (int) ((instr & 0x000000fe000LL) >> 13);
1700 int qp = (int) (instr & 0x0000000003fLL);
1701 if (qp == 0 && 8 <= fM && fM < 16 && !infpstores[fM - 8])
1703 infpstores[fM-8] = 1;
1704 last_prologue_pc = next_pc;
1708 && ( ((instr & 0x1ffc8000000LL) == 0x08ec0000000LL)
1709 || ((instr & 0x1efc0000000LL) == 0x0aec0000000LL)))
1711 /* st8.spill [rN] = rM
1713 st8.spill [rN] = rM, imm9 */
1714 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1715 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1716 int qp = (int) (instr & 0x0000000003fLL);
1717 if (qp == 0 && rN == spill_reg && 4 <= rM && rM <= 7)
1719 /* We've found a spill of one of the preserved general purpose
1720 regs. Record the spill address and advance the spill
1721 register if appropriate. */
1722 cache->saved_regs[IA64_GR0_REGNUM + rM] = spill_addr;
1723 if ((instr & 0x1efc0000000LL) == 0x0aec0000000LL)
1724 /* st8.spill [rN] = rM, imm9 */
1725 spill_addr += imm9(instr);
1727 spill_addr = 0; /* Done spilling. */
1728 last_prologue_pc = next_pc;
1735 /* If not frameless and we aren't called by skip_prologue, then we need
1736 to calculate registers for the previous frame which will be needed
1739 if (!frameless && this_frame)
1741 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1742 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1744 /* Extract the size of the rotating portion of the stack
1745 frame and the register rename base from the current
1751 rrb_gr = (cfm >> 18) & 0x7f;
1753 /* Find the bof (beginning of frame). */
1754 bof = rse_address_add (cache->bsp, -sof);
1756 for (i = 0, addr = bof;
1760 if (IS_NaT_COLLECTION_ADDR (addr))
1764 if (i+32 == cfm_reg)
1765 cache->saved_regs[IA64_CFM_REGNUM] = addr;
1766 if (i+32 == ret_reg)
1767 cache->saved_regs[IA64_VRAP_REGNUM] = addr;
1769 cache->saved_regs[IA64_VFP_REGNUM] = addr;
1772 /* For the previous argument registers we require the previous bof.
1773 If we can't find the previous cfm, then we can do nothing. */
1775 if (cache->saved_regs[IA64_CFM_REGNUM] != 0)
1777 cfm = read_memory_integer (cache->saved_regs[IA64_CFM_REGNUM],
1780 else if (cfm_reg != 0)
1782 get_frame_register (this_frame, cfm_reg, buf);
1783 cfm = extract_unsigned_integer (buf, 8, byte_order);
1785 cache->prev_cfm = cfm;
1789 sor = ((cfm >> 14) & 0xf) * 8;
1791 sol = (cfm >> 7) & 0x7f;
1792 rrb_gr = (cfm >> 18) & 0x7f;
1794 /* The previous bof only requires subtraction of the sol (size of
1795 locals) due to the overlap between output and input of
1796 subsequent frames. */
1797 bof = rse_address_add (bof, -sol);
1799 for (i = 0, addr = bof;
1803 if (IS_NaT_COLLECTION_ADDR (addr))
1808 cache->saved_regs[IA64_GR32_REGNUM
1809 + ((i + (sor - rrb_gr)) % sor)]
1812 cache->saved_regs[IA64_GR32_REGNUM + i] = addr;
1818 /* Try and trust the lim_pc value whenever possible. */
1819 if (trust_limit && lim_pc >= last_prologue_pc)
1820 last_prologue_pc = lim_pc;
1822 cache->frameless = frameless;
1823 cache->after_prologue = last_prologue_pc;
1824 cache->mem_stack_frame_size = mem_stack_frame_size;
1825 cache->fp_reg = fp_reg;
1827 return last_prologue_pc;
1831 ia64_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
1833 struct ia64_frame_cache cache;
1835 cache.after_prologue = 0;
1839 /* Call examine_prologue with - as third argument since we don't
1840 have a next frame pointer to send. */
1841 return examine_prologue (pc, pc+1024, 0, &cache);
1845 /* Normal frames. */
1847 static struct ia64_frame_cache *
1848 ia64_frame_cache (struct frame_info *this_frame, void **this_cache)
1850 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1851 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1852 struct ia64_frame_cache *cache;
1859 cache = ia64_alloc_frame_cache ();
1860 *this_cache = cache;
1862 get_frame_register (this_frame, sp_regnum, buf);
1863 cache->saved_sp = extract_unsigned_integer (buf, 8, byte_order);
1865 /* We always want the bsp to point to the end of frame.
1866 This way, we can always get the beginning of frame (bof)
1867 by subtracting frame size. */
1868 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
1869 cache->bsp = extract_unsigned_integer (buf, 8, byte_order);
1871 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
1872 psr = extract_unsigned_integer (buf, 8, byte_order);
1874 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
1875 cfm = extract_unsigned_integer (buf, 8, byte_order);
1877 cache->sof = (cfm & 0x7f);
1878 cache->sol = (cfm >> 7) & 0x7f;
1879 cache->sor = ((cfm >> 14) & 0xf) * 8;
1883 cache->pc = get_frame_func (this_frame);
1886 examine_prologue (cache->pc, get_frame_pc (this_frame), this_frame, cache);
1888 cache->base = cache->saved_sp + cache->mem_stack_frame_size;
1894 ia64_frame_this_id (struct frame_info *this_frame, void **this_cache,
1895 struct frame_id *this_id)
1897 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1898 struct ia64_frame_cache *cache =
1899 ia64_frame_cache (this_frame, this_cache);
1901 /* If outermost frame, mark with null frame id. */
1902 if (cache->base != 0)
1903 (*this_id) = frame_id_build_special (cache->base, cache->pc, cache->bsp);
1904 if (gdbarch_debug >= 1)
1905 fprintf_unfiltered (gdb_stdlog,
1906 "regular frame id: code %s, stack %s, "
1907 "special %s, this_frame %s\n",
1908 paddress (gdbarch, this_id->code_addr),
1909 paddress (gdbarch, this_id->stack_addr),
1910 paddress (gdbarch, cache->bsp),
1911 host_address_to_string (this_frame));
1914 static struct value *
1915 ia64_frame_prev_register (struct frame_info *this_frame, void **this_cache,
1918 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1919 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1920 struct ia64_frame_cache *cache = ia64_frame_cache (this_frame, this_cache);
1923 gdb_assert (regnum >= 0);
1925 if (!target_has_registers)
1926 error (_("No registers."));
1928 if (regnum == gdbarch_sp_regnum (gdbarch))
1929 return frame_unwind_got_constant (this_frame, regnum, cache->base);
1931 else if (regnum == IA64_BSP_REGNUM)
1934 CORE_ADDR prev_cfm, bsp, prev_bsp;
1936 /* We want to calculate the previous bsp as the end of the previous
1937 register stack frame. This corresponds to what the hardware bsp
1938 register will be if we pop the frame back which is why we might
1939 have been called. We know the beginning of the current frame is
1940 cache->bsp - cache->sof. This value in the previous frame points
1941 to the start of the output registers. We can calculate the end of
1942 that frame by adding the size of output:
1943 (sof (size of frame) - sol (size of locals)). */
1944 val = ia64_frame_prev_register (this_frame, this_cache, IA64_CFM_REGNUM);
1945 prev_cfm = extract_unsigned_integer (value_contents_all (val),
1947 bsp = rse_address_add (cache->bsp, -(cache->sof));
1949 rse_address_add (bsp, (prev_cfm & 0x7f) - ((prev_cfm >> 7) & 0x7f));
1951 return frame_unwind_got_constant (this_frame, regnum, prev_bsp);
1954 else if (regnum == IA64_CFM_REGNUM)
1956 CORE_ADDR addr = cache->saved_regs[IA64_CFM_REGNUM];
1959 return frame_unwind_got_memory (this_frame, regnum, addr);
1961 if (cache->prev_cfm)
1962 return frame_unwind_got_constant (this_frame, regnum, cache->prev_cfm);
1964 if (cache->frameless)
1965 return frame_unwind_got_register (this_frame, IA64_PFS_REGNUM,
1967 return frame_unwind_got_register (this_frame, regnum, 0);
1970 else if (regnum == IA64_VFP_REGNUM)
1972 /* If the function in question uses an automatic register (r32-r127)
1973 for the frame pointer, it'll be found by ia64_find_saved_register()
1974 above. If the function lacks one of these frame pointers, we can
1975 still provide a value since we know the size of the frame. */
1976 return frame_unwind_got_constant (this_frame, regnum, cache->base);
1979 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
1981 struct value *pr_val;
1984 pr_val = ia64_frame_prev_register (this_frame, this_cache,
1986 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
1988 /* Fetch predicate register rename base from current frame
1989 marker for this frame. */
1990 int rrb_pr = (cache->cfm >> 32) & 0x3f;
1992 /* Adjust the register number to account for register rotation. */
1993 regnum = VP16_REGNUM + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
1995 prN = extract_bit_field (value_contents_all (pr_val),
1996 regnum - VP0_REGNUM, 1);
1997 return frame_unwind_got_constant (this_frame, regnum, prN);
2000 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
2002 struct value *unat_val;
2004 unat_val = ia64_frame_prev_register (this_frame, this_cache,
2006 unatN = extract_bit_field (value_contents_all (unat_val),
2007 regnum - IA64_NAT0_REGNUM, 1);
2008 return frame_unwind_got_constant (this_frame, regnum, unatN);
2011 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
2014 /* Find address of general register corresponding to nat bit we're
2018 gr_addr = cache->saved_regs[regnum - IA64_NAT0_REGNUM + IA64_GR0_REGNUM];
2022 /* Compute address of nat collection bits. */
2023 CORE_ADDR nat_addr = gr_addr | 0x1f8;
2025 CORE_ADDR nat_collection;
2028 /* If our nat collection address is bigger than bsp, we have to get
2029 the nat collection from rnat. Otherwise, we fetch the nat
2030 collection from the computed address. */
2031 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2032 bsp = extract_unsigned_integer (buf, 8, byte_order);
2033 if (nat_addr >= bsp)
2035 get_frame_register (this_frame, IA64_RNAT_REGNUM, buf);
2036 nat_collection = extract_unsigned_integer (buf, 8, byte_order);
2039 nat_collection = read_memory_integer (nat_addr, 8, byte_order);
2040 nat_bit = (gr_addr >> 3) & 0x3f;
2041 natval = (nat_collection >> nat_bit) & 1;
2044 return frame_unwind_got_constant (this_frame, regnum, natval);
2047 else if (regnum == IA64_IP_REGNUM)
2050 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
2054 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
2055 pc = extract_unsigned_integer (buf, 8, byte_order);
2057 else if (cache->frameless)
2059 get_frame_register (this_frame, IA64_BR0_REGNUM, buf);
2060 pc = extract_unsigned_integer (buf, 8, byte_order);
2063 return frame_unwind_got_constant (this_frame, regnum, pc);
2066 else if (regnum == IA64_PSR_REGNUM)
2068 /* We don't know how to get the complete previous PSR, but we need it
2069 for the slot information when we unwind the pc (pc is formed of IP
2070 register plus slot information from PSR). To get the previous
2071 slot information, we mask it off the return address. */
2072 ULONGEST slot_num = 0;
2075 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
2077 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
2078 psr = extract_unsigned_integer (buf, 8, byte_order);
2082 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
2083 pc = extract_unsigned_integer (buf, 8, byte_order);
2085 else if (cache->frameless)
2087 get_frame_register (this_frame, IA64_BR0_REGNUM, buf);
2088 pc = extract_unsigned_integer (buf, 8, byte_order);
2090 psr &= ~(3LL << 41);
2091 slot_num = pc & 0x3LL;
2092 psr |= (CORE_ADDR)slot_num << 41;
2093 return frame_unwind_got_constant (this_frame, regnum, psr);
2096 else if (regnum == IA64_BR0_REGNUM)
2098 CORE_ADDR addr = cache->saved_regs[IA64_BR0_REGNUM];
2101 return frame_unwind_got_memory (this_frame, regnum, addr);
2103 return frame_unwind_got_constant (this_frame, regnum, 0);
2106 else if ((regnum >= IA64_GR32_REGNUM && regnum <= IA64_GR127_REGNUM)
2107 || (regnum >= V32_REGNUM && regnum <= V127_REGNUM))
2111 if (regnum >= V32_REGNUM)
2112 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
2113 addr = cache->saved_regs[regnum];
2115 return frame_unwind_got_memory (this_frame, regnum, addr);
2117 if (cache->frameless)
2119 struct value *reg_val;
2120 CORE_ADDR prev_cfm, prev_bsp, prev_bof;
2122 /* FIXME: brobecker/2008-05-01: Doesn't this seem redundant
2123 with the same code above? */
2124 if (regnum >= V32_REGNUM)
2125 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
2126 reg_val = ia64_frame_prev_register (this_frame, this_cache,
2128 prev_cfm = extract_unsigned_integer (value_contents_all (reg_val),
2130 reg_val = ia64_frame_prev_register (this_frame, this_cache,
2132 prev_bsp = extract_unsigned_integer (value_contents_all (reg_val),
2134 prev_bof = rse_address_add (prev_bsp, -(prev_cfm & 0x7f));
2136 addr = rse_address_add (prev_bof, (regnum - IA64_GR32_REGNUM));
2137 return frame_unwind_got_memory (this_frame, regnum, addr);
2140 return frame_unwind_got_constant (this_frame, regnum, 0);
2143 else /* All other registers. */
2147 if (IA64_FR32_REGNUM <= regnum && regnum <= IA64_FR127_REGNUM)
2149 /* Fetch floating point register rename base from current
2150 frame marker for this frame. */
2151 int rrb_fr = (cache->cfm >> 25) & 0x7f;
2153 /* Adjust the floating point register number to account for
2154 register rotation. */
2155 regnum = IA64_FR32_REGNUM
2156 + ((regnum - IA64_FR32_REGNUM) + rrb_fr) % 96;
2159 /* If we have stored a memory address, access the register. */
2160 addr = cache->saved_regs[regnum];
2162 return frame_unwind_got_memory (this_frame, regnum, addr);
2163 /* Otherwise, punt and get the current value of the register. */
2165 return frame_unwind_got_register (this_frame, regnum, regnum);
2169 static const struct frame_unwind ia64_frame_unwind =
2172 default_frame_unwind_stop_reason,
2173 &ia64_frame_this_id,
2174 &ia64_frame_prev_register,
2176 default_frame_sniffer
2179 /* Signal trampolines. */
2182 ia64_sigtramp_frame_init_saved_regs (struct frame_info *this_frame,
2183 struct ia64_frame_cache *cache)
2185 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2186 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
2188 if (tdep->sigcontext_register_address)
2192 cache->saved_regs[IA64_VRAP_REGNUM]
2193 = tdep->sigcontext_register_address (gdbarch, cache->base,
2195 cache->saved_regs[IA64_CFM_REGNUM]
2196 = tdep->sigcontext_register_address (gdbarch, cache->base,
2198 cache->saved_regs[IA64_PSR_REGNUM]
2199 = tdep->sigcontext_register_address (gdbarch, cache->base,
2201 cache->saved_regs[IA64_BSP_REGNUM]
2202 = tdep->sigcontext_register_address (gdbarch, cache->base,
2204 cache->saved_regs[IA64_RNAT_REGNUM]
2205 = tdep->sigcontext_register_address (gdbarch, cache->base,
2207 cache->saved_regs[IA64_CCV_REGNUM]
2208 = tdep->sigcontext_register_address (gdbarch, cache->base,
2210 cache->saved_regs[IA64_UNAT_REGNUM]
2211 = tdep->sigcontext_register_address (gdbarch, cache->base,
2213 cache->saved_regs[IA64_FPSR_REGNUM]
2214 = tdep->sigcontext_register_address (gdbarch, cache->base,
2216 cache->saved_regs[IA64_PFS_REGNUM]
2217 = tdep->sigcontext_register_address (gdbarch, cache->base,
2219 cache->saved_regs[IA64_LC_REGNUM]
2220 = tdep->sigcontext_register_address (gdbarch, cache->base,
2223 for (regno = IA64_GR1_REGNUM; regno <= IA64_GR31_REGNUM; regno++)
2224 cache->saved_regs[regno] =
2225 tdep->sigcontext_register_address (gdbarch, cache->base, regno);
2226 for (regno = IA64_BR0_REGNUM; regno <= IA64_BR7_REGNUM; regno++)
2227 cache->saved_regs[regno] =
2228 tdep->sigcontext_register_address (gdbarch, cache->base, regno);
2229 for (regno = IA64_FR2_REGNUM; regno <= IA64_FR31_REGNUM; regno++)
2230 cache->saved_regs[regno] =
2231 tdep->sigcontext_register_address (gdbarch, cache->base, regno);
2235 static struct ia64_frame_cache *
2236 ia64_sigtramp_frame_cache (struct frame_info *this_frame, void **this_cache)
2238 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2239 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2240 struct ia64_frame_cache *cache;
2246 cache = ia64_alloc_frame_cache ();
2248 get_frame_register (this_frame, sp_regnum, buf);
2249 /* Note that frame size is hard-coded below. We cannot calculate it
2250 via prologue examination. */
2251 cache->base = extract_unsigned_integer (buf, 8, byte_order) + 16;
2253 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2254 cache->bsp = extract_unsigned_integer (buf, 8, byte_order);
2256 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2257 cache->cfm = extract_unsigned_integer (buf, 8, byte_order);
2258 cache->sof = cache->cfm & 0x7f;
2260 ia64_sigtramp_frame_init_saved_regs (this_frame, cache);
2262 *this_cache = cache;
2267 ia64_sigtramp_frame_this_id (struct frame_info *this_frame,
2268 void **this_cache, struct frame_id *this_id)
2270 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2271 struct ia64_frame_cache *cache =
2272 ia64_sigtramp_frame_cache (this_frame, this_cache);
2274 (*this_id) = frame_id_build_special (cache->base,
2275 get_frame_pc (this_frame),
2277 if (gdbarch_debug >= 1)
2278 fprintf_unfiltered (gdb_stdlog,
2279 "sigtramp frame id: code %s, stack %s, "
2280 "special %s, this_frame %s\n",
2281 paddress (gdbarch, this_id->code_addr),
2282 paddress (gdbarch, this_id->stack_addr),
2283 paddress (gdbarch, cache->bsp),
2284 host_address_to_string (this_frame));
2287 static struct value *
2288 ia64_sigtramp_frame_prev_register (struct frame_info *this_frame,
2289 void **this_cache, int regnum)
2291 gdb_byte buf[MAX_REGISTER_SIZE];
2293 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2294 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2295 struct ia64_frame_cache *cache =
2296 ia64_sigtramp_frame_cache (this_frame, this_cache);
2298 gdb_assert (regnum >= 0);
2300 if (!target_has_registers)
2301 error (_("No registers."));
2303 if (regnum == IA64_IP_REGNUM)
2306 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
2310 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
2311 pc = extract_unsigned_integer (buf, 8, byte_order);
2314 return frame_unwind_got_constant (this_frame, regnum, pc);
2317 else if ((regnum >= IA64_GR32_REGNUM && regnum <= IA64_GR127_REGNUM)
2318 || (regnum >= V32_REGNUM && regnum <= V127_REGNUM))
2322 if (regnum >= V32_REGNUM)
2323 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
2324 addr = cache->saved_regs[regnum];
2326 return frame_unwind_got_memory (this_frame, regnum, addr);
2328 return frame_unwind_got_constant (this_frame, regnum, 0);
2331 else /* All other registers not listed above. */
2333 CORE_ADDR addr = cache->saved_regs[regnum];
2336 return frame_unwind_got_memory (this_frame, regnum, addr);
2338 return frame_unwind_got_constant (this_frame, regnum, 0);
2343 ia64_sigtramp_frame_sniffer (const struct frame_unwind *self,
2344 struct frame_info *this_frame,
2347 struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame));
2348 if (tdep->pc_in_sigtramp)
2350 CORE_ADDR pc = get_frame_pc (this_frame);
2352 if (tdep->pc_in_sigtramp (pc))
2359 static const struct frame_unwind ia64_sigtramp_frame_unwind =
2362 default_frame_unwind_stop_reason,
2363 ia64_sigtramp_frame_this_id,
2364 ia64_sigtramp_frame_prev_register,
2366 ia64_sigtramp_frame_sniffer
2372 ia64_frame_base_address (struct frame_info *this_frame, void **this_cache)
2374 struct ia64_frame_cache *cache = ia64_frame_cache (this_frame, this_cache);
2379 static const struct frame_base ia64_frame_base =
2382 ia64_frame_base_address,
2383 ia64_frame_base_address,
2384 ia64_frame_base_address
2387 #ifdef HAVE_LIBUNWIND_IA64_H
2389 struct ia64_unwind_table_entry
2391 unw_word_t start_offset;
2392 unw_word_t end_offset;
2393 unw_word_t info_offset;
2396 static __inline__ uint64_t
2397 ia64_rse_slot_num (uint64_t addr)
2399 return (addr >> 3) & 0x3f;
2402 /* Skip over a designated number of registers in the backing
2403 store, remembering every 64th position is for NAT. */
2404 static __inline__ uint64_t
2405 ia64_rse_skip_regs (uint64_t addr, long num_regs)
2407 long delta = ia64_rse_slot_num(addr) + num_regs;
2411 return addr + ((num_regs + delta/0x3f) << 3);
2414 /* Gdb ia64-libunwind-tdep callback function to convert from an ia64 gdb
2415 register number to a libunwind register number. */
2417 ia64_gdb2uw_regnum (int regnum)
2419 if (regnum == sp_regnum)
2421 else if (regnum == IA64_BSP_REGNUM)
2422 return UNW_IA64_BSP;
2423 else if ((unsigned) (regnum - IA64_GR0_REGNUM) < 128)
2424 return UNW_IA64_GR + (regnum - IA64_GR0_REGNUM);
2425 else if ((unsigned) (regnum - V32_REGNUM) < 95)
2426 return UNW_IA64_GR + 32 + (regnum - V32_REGNUM);
2427 else if ((unsigned) (regnum - IA64_FR0_REGNUM) < 128)
2428 return UNW_IA64_FR + (regnum - IA64_FR0_REGNUM);
2429 else if ((unsigned) (regnum - IA64_PR0_REGNUM) < 64)
2431 else if ((unsigned) (regnum - IA64_BR0_REGNUM) < 8)
2432 return UNW_IA64_BR + (regnum - IA64_BR0_REGNUM);
2433 else if (regnum == IA64_PR_REGNUM)
2435 else if (regnum == IA64_IP_REGNUM)
2437 else if (regnum == IA64_CFM_REGNUM)
2438 return UNW_IA64_CFM;
2439 else if ((unsigned) (regnum - IA64_AR0_REGNUM) < 128)
2440 return UNW_IA64_AR + (regnum - IA64_AR0_REGNUM);
2441 else if ((unsigned) (regnum - IA64_NAT0_REGNUM) < 128)
2442 return UNW_IA64_NAT + (regnum - IA64_NAT0_REGNUM);
2447 /* Gdb ia64-libunwind-tdep callback function to convert from a libunwind
2448 register number to a ia64 gdb register number. */
2450 ia64_uw2gdb_regnum (int uw_regnum)
2452 if (uw_regnum == UNW_IA64_SP)
2454 else if (uw_regnum == UNW_IA64_BSP)
2455 return IA64_BSP_REGNUM;
2456 else if ((unsigned) (uw_regnum - UNW_IA64_GR) < 32)
2457 return IA64_GR0_REGNUM + (uw_regnum - UNW_IA64_GR);
2458 else if ((unsigned) (uw_regnum - UNW_IA64_GR) < 128)
2459 return V32_REGNUM + (uw_regnum - (IA64_GR0_REGNUM + 32));
2460 else if ((unsigned) (uw_regnum - UNW_IA64_FR) < 128)
2461 return IA64_FR0_REGNUM + (uw_regnum - UNW_IA64_FR);
2462 else if ((unsigned) (uw_regnum - UNW_IA64_BR) < 8)
2463 return IA64_BR0_REGNUM + (uw_regnum - UNW_IA64_BR);
2464 else if (uw_regnum == UNW_IA64_PR)
2465 return IA64_PR_REGNUM;
2466 else if (uw_regnum == UNW_REG_IP)
2467 return IA64_IP_REGNUM;
2468 else if (uw_regnum == UNW_IA64_CFM)
2469 return IA64_CFM_REGNUM;
2470 else if ((unsigned) (uw_regnum - UNW_IA64_AR) < 128)
2471 return IA64_AR0_REGNUM + (uw_regnum - UNW_IA64_AR);
2472 else if ((unsigned) (uw_regnum - UNW_IA64_NAT) < 128)
2473 return IA64_NAT0_REGNUM + (uw_regnum - UNW_IA64_NAT);
2478 /* Gdb ia64-libunwind-tdep callback function to reveal if register is
2479 a float register or not. */
2481 ia64_is_fpreg (int uw_regnum)
2483 return unw_is_fpreg (uw_regnum);
2486 /* Libunwind callback accessor function for general registers. */
2488 ia64_access_reg (unw_addr_space_t as, unw_regnum_t uw_regnum, unw_word_t *val,
2489 int write, void *arg)
2491 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2492 unw_word_t bsp, sof, sol, cfm, psr, ip;
2493 struct frame_info *this_frame = arg;
2494 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2495 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2496 long new_sof, old_sof;
2497 gdb_byte buf[MAX_REGISTER_SIZE];
2499 /* We never call any libunwind routines that need to write registers. */
2500 gdb_assert (!write);
2505 /* Libunwind expects to see the pc value which means the slot number
2506 from the psr must be merged with the ip word address. */
2507 get_frame_register (this_frame, IA64_IP_REGNUM, buf);
2508 ip = extract_unsigned_integer (buf, 8, byte_order);
2509 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
2510 psr = extract_unsigned_integer (buf, 8, byte_order);
2511 *val = ip | ((psr >> 41) & 0x3);
2514 case UNW_IA64_AR_BSP:
2515 /* Libunwind expects to see the beginning of the current
2516 register frame so we must account for the fact that
2517 ptrace() will return a value for bsp that points *after*
2518 the current register frame. */
2519 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2520 bsp = extract_unsigned_integer (buf, 8, byte_order);
2521 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2522 cfm = extract_unsigned_integer (buf, 8, byte_order);
2523 sof = gdbarch_tdep (gdbarch)->size_of_register_frame (this_frame, cfm);
2524 *val = ia64_rse_skip_regs (bsp, -sof);
2527 case UNW_IA64_AR_BSPSTORE:
2528 /* Libunwind wants bspstore to be after the current register frame.
2529 This is what ptrace() and gdb treats as the regular bsp value. */
2530 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2531 *val = extract_unsigned_integer (buf, 8, byte_order);
2535 /* For all other registers, just unwind the value directly. */
2536 get_frame_register (this_frame, regnum, buf);
2537 *val = extract_unsigned_integer (buf, 8, byte_order);
2541 if (gdbarch_debug >= 1)
2542 fprintf_unfiltered (gdb_stdlog,
2543 " access_reg: from cache: %4s=%s\n",
2544 (((unsigned) regnum <= IA64_NAT127_REGNUM)
2545 ? ia64_register_names[regnum] : "r??"),
2546 paddress (gdbarch, *val));
2550 /* Libunwind callback accessor function for floating-point registers. */
2552 ia64_access_fpreg (unw_addr_space_t as, unw_regnum_t uw_regnum,
2553 unw_fpreg_t *val, int write, void *arg)
2555 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2556 struct frame_info *this_frame = arg;
2558 /* We never call any libunwind routines that need to write registers. */
2559 gdb_assert (!write);
2561 get_frame_register (this_frame, regnum, (gdb_byte *) val);
2566 /* Libunwind callback accessor function for top-level rse registers. */
2568 ia64_access_rse_reg (unw_addr_space_t as, unw_regnum_t uw_regnum,
2569 unw_word_t *val, int write, void *arg)
2571 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2572 unw_word_t bsp, sof, sol, cfm, psr, ip;
2573 struct regcache *regcache = arg;
2574 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2575 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2576 long new_sof, old_sof;
2577 gdb_byte buf[MAX_REGISTER_SIZE];
2579 /* We never call any libunwind routines that need to write registers. */
2580 gdb_assert (!write);
2585 /* Libunwind expects to see the pc value which means the slot number
2586 from the psr must be merged with the ip word address. */
2587 regcache_cooked_read (regcache, IA64_IP_REGNUM, buf);
2588 ip = extract_unsigned_integer (buf, 8, byte_order);
2589 regcache_cooked_read (regcache, IA64_PSR_REGNUM, buf);
2590 psr = extract_unsigned_integer (buf, 8, byte_order);
2591 *val = ip | ((psr >> 41) & 0x3);
2594 case UNW_IA64_AR_BSP:
2595 /* Libunwind expects to see the beginning of the current
2596 register frame so we must account for the fact that
2597 ptrace() will return a value for bsp that points *after*
2598 the current register frame. */
2599 regcache_cooked_read (regcache, IA64_BSP_REGNUM, buf);
2600 bsp = extract_unsigned_integer (buf, 8, byte_order);
2601 regcache_cooked_read (regcache, IA64_CFM_REGNUM, buf);
2602 cfm = extract_unsigned_integer (buf, 8, byte_order);
2604 *val = ia64_rse_skip_regs (bsp, -sof);
2607 case UNW_IA64_AR_BSPSTORE:
2608 /* Libunwind wants bspstore to be after the current register frame.
2609 This is what ptrace() and gdb treats as the regular bsp value. */
2610 regcache_cooked_read (regcache, IA64_BSP_REGNUM, buf);
2611 *val = extract_unsigned_integer (buf, 8, byte_order);
2615 /* For all other registers, just unwind the value directly. */
2616 regcache_cooked_read (regcache, regnum, buf);
2617 *val = extract_unsigned_integer (buf, 8, byte_order);
2621 if (gdbarch_debug >= 1)
2622 fprintf_unfiltered (gdb_stdlog,
2623 " access_rse_reg: from cache: %4s=%s\n",
2624 (((unsigned) regnum <= IA64_NAT127_REGNUM)
2625 ? ia64_register_names[regnum] : "r??"),
2626 paddress (gdbarch, *val));
2631 /* Libunwind callback accessor function for top-level fp registers. */
2633 ia64_access_rse_fpreg (unw_addr_space_t as, unw_regnum_t uw_regnum,
2634 unw_fpreg_t *val, int write, void *arg)
2636 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2637 struct regcache *regcache = arg;
2639 /* We never call any libunwind routines that need to write registers. */
2640 gdb_assert (!write);
2642 regcache_cooked_read (regcache, regnum, (gdb_byte *) val);
2647 /* Libunwind callback accessor function for accessing memory. */
2649 ia64_access_mem (unw_addr_space_t as,
2650 unw_word_t addr, unw_word_t *val,
2651 int write, void *arg)
2653 if (addr - KERNEL_START < ktab_size)
2655 unw_word_t *laddr = (unw_word_t*) ((char *) ktab
2656 + (addr - KERNEL_START));
2665 /* XXX do we need to normalize byte-order here? */
2667 return target_write_memory (addr, (gdb_byte *) val, sizeof (unw_word_t));
2669 return target_read_memory (addr, (gdb_byte *) val, sizeof (unw_word_t));
2672 /* Call low-level function to access the kernel unwind table. */
2674 getunwind_table (gdb_byte **buf_p)
2678 /* FIXME drow/2005-09-10: This code used to call
2679 ia64_linux_xfer_unwind_table directly to fetch the unwind table
2680 for the currently running ia64-linux kernel. That data should
2681 come from the core file and be accessed via the auxv vector; if
2682 we want to preserve fall back to the running kernel's table, then
2683 we should find a way to override the corefile layer's
2684 xfer_partial method. */
2686 x = target_read_alloc (¤t_target, TARGET_OBJECT_UNWIND_TABLE,
2692 /* Get the kernel unwind table. */
2694 get_kernel_table (unw_word_t ip, unw_dyn_info_t *di)
2696 static struct ia64_table_entry *etab;
2703 size = getunwind_table (&ktab_buf);
2705 return -UNW_ENOINFO;
2707 ktab = (struct ia64_table_entry *) ktab_buf;
2710 for (etab = ktab; etab->start_offset; ++etab)
2711 etab->info_offset += KERNEL_START;
2714 if (ip < ktab[0].start_offset || ip >= etab[-1].end_offset)
2715 return -UNW_ENOINFO;
2717 di->format = UNW_INFO_FORMAT_TABLE;
2719 di->start_ip = ktab[0].start_offset;
2720 di->end_ip = etab[-1].end_offset;
2721 di->u.ti.name_ptr = (unw_word_t) "<kernel>";
2722 di->u.ti.segbase = 0;
2723 di->u.ti.table_len = ((char *) etab - (char *) ktab) / sizeof (unw_word_t);
2724 di->u.ti.table_data = (unw_word_t *) ktab;
2726 if (gdbarch_debug >= 1)
2727 fprintf_unfiltered (gdb_stdlog, "get_kernel_table: found table `%s': "
2728 "segbase=%s, length=%s, gp=%s\n",
2729 (char *) di->u.ti.name_ptr,
2730 hex_string (di->u.ti.segbase),
2731 pulongest (di->u.ti.table_len),
2732 hex_string (di->gp));
2736 /* Find the unwind table entry for a specified address. */
2738 ia64_find_unwind_table (struct objfile *objfile, unw_word_t ip,
2739 unw_dyn_info_t *dip, void **buf)
2741 Elf_Internal_Phdr *phdr, *p_text = NULL, *p_unwind = NULL;
2742 Elf_Internal_Ehdr *ehdr;
2743 unw_word_t segbase = 0;
2744 CORE_ADDR load_base;
2748 bfd = objfile->obfd;
2750 ehdr = elf_tdata (bfd)->elf_header;
2751 phdr = elf_tdata (bfd)->phdr;
2753 load_base = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2755 for (i = 0; i < ehdr->e_phnum; ++i)
2757 switch (phdr[i].p_type)
2760 if ((unw_word_t) (ip - load_base - phdr[i].p_vaddr)
2765 case PT_IA_64_UNWIND:
2766 p_unwind = phdr + i;
2774 if (!p_text || !p_unwind)
2775 return -UNW_ENOINFO;
2777 /* Verify that the segment that contains the IP also contains
2778 the static unwind table. If not, we may be in the Linux kernel's
2779 DSO gate page in which case the unwind table is another segment.
2780 Otherwise, we are dealing with runtime-generated code, for which we
2781 have no info here. */
2782 segbase = p_text->p_vaddr + load_base;
2784 if ((p_unwind->p_vaddr - p_text->p_vaddr) >= p_text->p_memsz)
2787 for (i = 0; i < ehdr->e_phnum; ++i)
2789 if (phdr[i].p_type == PT_LOAD
2790 && (p_unwind->p_vaddr - phdr[i].p_vaddr) < phdr[i].p_memsz)
2793 /* Get the segbase from the section containing the
2795 segbase = phdr[i].p_vaddr + load_base;
2799 return -UNW_ENOINFO;
2802 dip->start_ip = p_text->p_vaddr + load_base;
2803 dip->end_ip = dip->start_ip + p_text->p_memsz;
2804 dip->gp = ia64_find_global_pointer (get_objfile_arch (objfile), ip);
2805 dip->format = UNW_INFO_FORMAT_REMOTE_TABLE;
2806 dip->u.rti.name_ptr = (unw_word_t) bfd_get_filename (bfd);
2807 dip->u.rti.segbase = segbase;
2808 dip->u.rti.table_len = p_unwind->p_memsz / sizeof (unw_word_t);
2809 dip->u.rti.table_data = p_unwind->p_vaddr + load_base;
2814 /* Libunwind callback accessor function to acquire procedure unwind-info. */
2816 ia64_find_proc_info_x (unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
2817 int need_unwind_info, void *arg)
2819 struct obj_section *sec = find_pc_section (ip);
2826 /* XXX This only works if the host and the target architecture are
2827 both ia64 and if the have (more or less) the same kernel
2829 if (get_kernel_table (ip, &di) < 0)
2830 return -UNW_ENOINFO;
2832 if (gdbarch_debug >= 1)
2833 fprintf_unfiltered (gdb_stdlog, "ia64_find_proc_info_x: %s -> "
2834 "(name=`%s',segbase=%s,start=%s,end=%s,gp=%s,"
2835 "length=%s,data=%s)\n",
2836 hex_string (ip), (char *)di.u.ti.name_ptr,
2837 hex_string (di.u.ti.segbase),
2838 hex_string (di.start_ip), hex_string (di.end_ip),
2840 pulongest (di.u.ti.table_len),
2841 hex_string ((CORE_ADDR)di.u.ti.table_data));
2845 ret = ia64_find_unwind_table (sec->objfile, ip, &di, &buf);
2849 if (gdbarch_debug >= 1)
2850 fprintf_unfiltered (gdb_stdlog, "ia64_find_proc_info_x: %s -> "
2851 "(name=`%s',segbase=%s,start=%s,end=%s,gp=%s,"
2852 "length=%s,data=%s)\n",
2853 hex_string (ip), (char *)di.u.rti.name_ptr,
2854 hex_string (di.u.rti.segbase),
2855 hex_string (di.start_ip), hex_string (di.end_ip),
2857 pulongest (di.u.rti.table_len),
2858 hex_string (di.u.rti.table_data));
2861 ret = libunwind_search_unwind_table (&as, ip, &di, pi, need_unwind_info,
2864 /* We no longer need the dyn info storage so free it. */
2870 /* Libunwind callback accessor function for cleanup. */
2872 ia64_put_unwind_info (unw_addr_space_t as,
2873 unw_proc_info_t *pip, void *arg)
2875 /* Nothing required for now. */
2878 /* Libunwind callback accessor function to get head of the dynamic
2879 unwind-info registration list. */
2881 ia64_get_dyn_info_list (unw_addr_space_t as,
2882 unw_word_t *dilap, void *arg)
2884 struct obj_section *text_sec;
2885 struct objfile *objfile;
2886 unw_word_t ip, addr;
2890 if (!libunwind_is_initialized ())
2891 return -UNW_ENOINFO;
2893 for (objfile = object_files; objfile; objfile = objfile->next)
2897 text_sec = objfile->sections + SECT_OFF_TEXT (objfile);
2898 ip = obj_section_addr (text_sec);
2899 ret = ia64_find_unwind_table (objfile, ip, &di, &buf);
2902 addr = libunwind_find_dyn_list (as, &di, arg);
2903 /* We no longer need the dyn info storage so free it. */
2908 if (gdbarch_debug >= 1)
2909 fprintf_unfiltered (gdb_stdlog,
2910 "dynamic unwind table in objfile %s "
2912 bfd_get_filename (objfile->obfd),
2913 hex_string (addr), hex_string (di.gp));
2919 return -UNW_ENOINFO;
2923 /* Frame interface functions for libunwind. */
2926 ia64_libunwind_frame_this_id (struct frame_info *this_frame, void **this_cache,
2927 struct frame_id *this_id)
2929 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2930 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2931 struct frame_id id = outer_frame_id;
2935 libunwind_frame_this_id (this_frame, this_cache, &id);
2936 if (frame_id_eq (id, outer_frame_id))
2938 (*this_id) = outer_frame_id;
2942 /* We must add the bsp as the special address for frame comparison
2944 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2945 bsp = extract_unsigned_integer (buf, 8, byte_order);
2947 (*this_id) = frame_id_build_special (id.stack_addr, id.code_addr, bsp);
2949 if (gdbarch_debug >= 1)
2950 fprintf_unfiltered (gdb_stdlog,
2951 "libunwind frame id: code %s, stack %s, "
2952 "special %s, this_frame %s\n",
2953 paddress (gdbarch, id.code_addr),
2954 paddress (gdbarch, id.stack_addr),
2955 paddress (gdbarch, bsp),
2956 host_address_to_string (this_frame));
2959 static struct value *
2960 ia64_libunwind_frame_prev_register (struct frame_info *this_frame,
2961 void **this_cache, int regnum)
2964 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2965 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2968 if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
2969 reg = IA64_PR_REGNUM;
2970 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
2971 reg = IA64_UNAT_REGNUM;
2973 /* Let libunwind do most of the work. */
2974 val = libunwind_frame_prev_register (this_frame, this_cache, reg);
2976 if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
2980 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
2984 gdb_byte buf[MAX_REGISTER_SIZE];
2986 /* Fetch predicate register rename base from current frame
2987 marker for this frame. */
2988 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2989 cfm = extract_unsigned_integer (buf, 8, byte_order);
2990 rrb_pr = (cfm >> 32) & 0x3f;
2992 /* Adjust the register number to account for register rotation. */
2993 regnum = VP16_REGNUM + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
2995 prN_val = extract_bit_field (value_contents_all (val),
2996 regnum - VP0_REGNUM, 1);
2997 return frame_unwind_got_constant (this_frame, regnum, prN_val);
3000 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
3004 unatN_val = extract_bit_field (value_contents_all (val),
3005 regnum - IA64_NAT0_REGNUM, 1);
3006 return frame_unwind_got_constant (this_frame, regnum, unatN_val);
3009 else if (regnum == IA64_BSP_REGNUM)
3011 struct value *cfm_val;
3012 CORE_ADDR prev_bsp, prev_cfm;
3014 /* We want to calculate the previous bsp as the end of the previous
3015 register stack frame. This corresponds to what the hardware bsp
3016 register will be if we pop the frame back which is why we might
3017 have been called. We know that libunwind will pass us back the
3018 beginning of the current frame so we should just add sof to it. */
3019 prev_bsp = extract_unsigned_integer (value_contents_all (val),
3021 cfm_val = libunwind_frame_prev_register (this_frame, this_cache,
3023 prev_cfm = extract_unsigned_integer (value_contents_all (cfm_val),
3025 prev_bsp = rse_address_add (prev_bsp, (prev_cfm & 0x7f));
3027 return frame_unwind_got_constant (this_frame, regnum, prev_bsp);
3034 ia64_libunwind_frame_sniffer (const struct frame_unwind *self,
3035 struct frame_info *this_frame,
3038 if (libunwind_is_initialized ()
3039 && libunwind_frame_sniffer (self, this_frame, this_cache))
3045 static const struct frame_unwind ia64_libunwind_frame_unwind =
3048 default_frame_unwind_stop_reason,
3049 ia64_libunwind_frame_this_id,
3050 ia64_libunwind_frame_prev_register,
3052 ia64_libunwind_frame_sniffer,
3053 libunwind_frame_dealloc_cache
3057 ia64_libunwind_sigtramp_frame_this_id (struct frame_info *this_frame,
3059 struct frame_id *this_id)
3061 struct gdbarch *gdbarch = get_frame_arch (this_frame);
3062 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3065 struct frame_id id = outer_frame_id;
3068 libunwind_frame_this_id (this_frame, this_cache, &id);
3069 if (frame_id_eq (id, outer_frame_id))
3071 (*this_id) = outer_frame_id;
3075 /* We must add the bsp as the special address for frame comparison
3077 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
3078 bsp = extract_unsigned_integer (buf, 8, byte_order);
3080 /* For a sigtramp frame, we don't make the check for previous ip being 0. */
3081 (*this_id) = frame_id_build_special (id.stack_addr, id.code_addr, bsp);
3083 if (gdbarch_debug >= 1)
3084 fprintf_unfiltered (gdb_stdlog,
3085 "libunwind sigtramp frame id: code %s, "
3086 "stack %s, special %s, this_frame %s\n",
3087 paddress (gdbarch, id.code_addr),
3088 paddress (gdbarch, id.stack_addr),
3089 paddress (gdbarch, bsp),
3090 host_address_to_string (this_frame));
3093 static struct value *
3094 ia64_libunwind_sigtramp_frame_prev_register (struct frame_info *this_frame,
3095 void **this_cache, int regnum)
3097 struct gdbarch *gdbarch = get_frame_arch (this_frame);
3098 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3099 struct value *prev_ip_val;
3102 /* If the previous frame pc value is 0, then we want to use the SIGCONTEXT
3103 method of getting previous registers. */
3104 prev_ip_val = libunwind_frame_prev_register (this_frame, this_cache,
3106 prev_ip = extract_unsigned_integer (value_contents_all (prev_ip_val),
3111 void *tmp_cache = NULL;
3112 return ia64_sigtramp_frame_prev_register (this_frame, &tmp_cache,
3116 return ia64_libunwind_frame_prev_register (this_frame, this_cache, regnum);
3120 ia64_libunwind_sigtramp_frame_sniffer (const struct frame_unwind *self,
3121 struct frame_info *this_frame,
3124 if (libunwind_is_initialized ())
3126 if (libunwind_sigtramp_frame_sniffer (self, this_frame, this_cache))
3131 return ia64_sigtramp_frame_sniffer (self, this_frame, this_cache);
3134 static const struct frame_unwind ia64_libunwind_sigtramp_frame_unwind =
3137 default_frame_unwind_stop_reason,
3138 ia64_libunwind_sigtramp_frame_this_id,
3139 ia64_libunwind_sigtramp_frame_prev_register,
3141 ia64_libunwind_sigtramp_frame_sniffer
3144 /* Set of libunwind callback acccessor functions. */
3145 unw_accessors_t ia64_unw_accessors =
3147 ia64_find_proc_info_x,
3148 ia64_put_unwind_info,
3149 ia64_get_dyn_info_list,
3157 /* Set of special libunwind callback acccessor functions specific for accessing
3158 the rse registers. At the top of the stack, we want libunwind to figure out
3159 how to read r32 - r127. Though usually they are found sequentially in
3160 memory starting from $bof, this is not always true. */
3161 unw_accessors_t ia64_unw_rse_accessors =
3163 ia64_find_proc_info_x,
3164 ia64_put_unwind_info,
3165 ia64_get_dyn_info_list,
3167 ia64_access_rse_reg,
3168 ia64_access_rse_fpreg,
3173 /* Set of ia64-libunwind-tdep gdb callbacks and data for generic
3174 ia64-libunwind-tdep code to use. */
3175 struct libunwind_descr ia64_libunwind_descr =
3180 &ia64_unw_accessors,
3181 &ia64_unw_rse_accessors,
3184 #endif /* HAVE_LIBUNWIND_IA64_H */
3187 ia64_use_struct_convention (struct type *type)
3189 struct type *float_elt_type;
3191 /* Don't use the struct convention for anything but structure,
3192 union, or array types. */
3193 if (!(TYPE_CODE (type) == TYPE_CODE_STRUCT
3194 || TYPE_CODE (type) == TYPE_CODE_UNION
3195 || TYPE_CODE (type) == TYPE_CODE_ARRAY))
3198 /* HFAs are structures (or arrays) consisting entirely of floating
3199 point values of the same length. Up to 8 of these are returned
3200 in registers. Don't use the struct convention when this is the
3202 float_elt_type = is_float_or_hfa_type (type);
3203 if (float_elt_type != NULL
3204 && TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type) <= 8)
3207 /* Other structs of length 32 or less are returned in r8-r11.
3208 Don't use the struct convention for those either. */
3209 return TYPE_LENGTH (type) > 32;
3212 /* Return non-zero if TYPE is a structure or union type. */
3215 ia64_struct_type_p (const struct type *type)
3217 return (TYPE_CODE (type) == TYPE_CODE_STRUCT
3218 || TYPE_CODE (type) == TYPE_CODE_UNION);
3222 ia64_extract_return_value (struct type *type, struct regcache *regcache,
3225 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3226 struct type *float_elt_type;
3228 float_elt_type = is_float_or_hfa_type (type);
3229 if (float_elt_type != NULL)
3231 gdb_byte from[MAX_REGISTER_SIZE];
3233 int regnum = IA64_FR8_REGNUM;
3234 int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type);
3238 regcache_cooked_read (regcache, regnum, from);
3239 convert_typed_floating (from, ia64_ext_type (gdbarch),
3240 (char *)valbuf + offset, float_elt_type);
3241 offset += TYPE_LENGTH (float_elt_type);
3245 else if (!ia64_struct_type_p (type) && TYPE_LENGTH (type) < 8)
3247 /* This is an integral value, and its size is less than 8 bytes.
3248 These values are LSB-aligned, so extract the relevant bytes,
3249 and copy them into VALBUF. */
3250 /* brobecker/2005-12-30: Actually, all integral values are LSB aligned,
3251 so I suppose we should also add handling here for integral values
3252 whose size is greater than 8. But I wasn't able to create such
3253 a type, neither in C nor in Ada, so not worrying about these yet. */
3254 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3257 regcache_cooked_read_unsigned (regcache, IA64_GR8_REGNUM, &val);
3258 store_unsigned_integer (valbuf, TYPE_LENGTH (type), byte_order, val);
3264 int regnum = IA64_GR8_REGNUM;
3265 int reglen = TYPE_LENGTH (register_type (gdbarch, IA64_GR8_REGNUM));
3266 int n = TYPE_LENGTH (type) / reglen;
3267 int m = TYPE_LENGTH (type) % reglen;
3272 regcache_cooked_read_unsigned (regcache, regnum, &val);
3273 memcpy ((char *)valbuf + offset, &val, reglen);
3280 regcache_cooked_read_unsigned (regcache, regnum, &val);
3281 memcpy ((char *)valbuf + offset, &val, m);
3287 ia64_store_return_value (struct type *type, struct regcache *regcache,
3288 const gdb_byte *valbuf)
3290 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3291 struct type *float_elt_type;
3293 float_elt_type = is_float_or_hfa_type (type);
3294 if (float_elt_type != NULL)
3296 gdb_byte to[MAX_REGISTER_SIZE];
3298 int regnum = IA64_FR8_REGNUM;
3299 int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type);
3303 convert_typed_floating ((char *)valbuf + offset, float_elt_type,
3304 to, ia64_ext_type (gdbarch));
3305 regcache_cooked_write (regcache, regnum, to);
3306 offset += TYPE_LENGTH (float_elt_type);
3314 int regnum = IA64_GR8_REGNUM;
3315 int reglen = TYPE_LENGTH (register_type (gdbarch, IA64_GR8_REGNUM));
3316 int n = TYPE_LENGTH (type) / reglen;
3317 int m = TYPE_LENGTH (type) % reglen;
3322 memcpy (&val, (char *)valbuf + offset, reglen);
3323 regcache_cooked_write_unsigned (regcache, regnum, val);
3330 memcpy (&val, (char *)valbuf + offset, m);
3331 regcache_cooked_write_unsigned (regcache, regnum, val);
3336 static enum return_value_convention
3337 ia64_return_value (struct gdbarch *gdbarch, struct value *function,
3338 struct type *valtype, struct regcache *regcache,
3339 gdb_byte *readbuf, const gdb_byte *writebuf)
3341 int struct_return = ia64_use_struct_convention (valtype);
3343 if (writebuf != NULL)
3345 gdb_assert (!struct_return);
3346 ia64_store_return_value (valtype, regcache, writebuf);
3349 if (readbuf != NULL)
3351 gdb_assert (!struct_return);
3352 ia64_extract_return_value (valtype, regcache, readbuf);
3356 return RETURN_VALUE_STRUCT_CONVENTION;
3358 return RETURN_VALUE_REGISTER_CONVENTION;
3362 is_float_or_hfa_type_recurse (struct type *t, struct type **etp)
3364 switch (TYPE_CODE (t))
3368 return TYPE_LENGTH (*etp) == TYPE_LENGTH (t);
3375 case TYPE_CODE_ARRAY:
3377 is_float_or_hfa_type_recurse (check_typedef (TYPE_TARGET_TYPE (t)),
3380 case TYPE_CODE_STRUCT:
3384 for (i = 0; i < TYPE_NFIELDS (t); i++)
3385 if (!is_float_or_hfa_type_recurse
3386 (check_typedef (TYPE_FIELD_TYPE (t, i)), etp))
3397 /* Determine if the given type is one of the floating point types or
3398 and HFA (which is a struct, array, or combination thereof whose
3399 bottom-most elements are all of the same floating point type). */
3401 static struct type *
3402 is_float_or_hfa_type (struct type *t)
3404 struct type *et = 0;
3406 return is_float_or_hfa_type_recurse (t, &et) ? et : 0;
3410 /* Return 1 if the alignment of T is such that the next even slot
3411 should be used. Return 0, if the next available slot should
3412 be used. (See section 8.5.1 of the IA-64 Software Conventions
3413 and Runtime manual). */
3416 slot_alignment_is_next_even (struct type *t)
3418 switch (TYPE_CODE (t))
3422 if (TYPE_LENGTH (t) > 8)
3426 case TYPE_CODE_ARRAY:
3428 slot_alignment_is_next_even (check_typedef (TYPE_TARGET_TYPE (t)));
3429 case TYPE_CODE_STRUCT:
3433 for (i = 0; i < TYPE_NFIELDS (t); i++)
3434 if (slot_alignment_is_next_even
3435 (check_typedef (TYPE_FIELD_TYPE (t, i))))
3444 /* Attempt to find (and return) the global pointer for the given
3447 This is a rather nasty bit of code searchs for the .dynamic section
3448 in the objfile corresponding to the pc of the function we're trying
3449 to call. Once it finds the addresses at which the .dynamic section
3450 lives in the child process, it scans the Elf64_Dyn entries for a
3451 DT_PLTGOT tag. If it finds one of these, the corresponding
3452 d_un.d_ptr value is the global pointer. */
3455 ia64_find_global_pointer_from_dynamic_section (struct gdbarch *gdbarch,
3458 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3459 struct obj_section *faddr_sect;
3461 faddr_sect = find_pc_section (faddr);
3462 if (faddr_sect != NULL)
3464 struct obj_section *osect;
3466 ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
3468 if (strcmp (osect->the_bfd_section->name, ".dynamic") == 0)
3472 if (osect < faddr_sect->objfile->sections_end)
3474 CORE_ADDR addr, endaddr;
3476 addr = obj_section_addr (osect);
3477 endaddr = obj_section_endaddr (osect);
3479 while (addr < endaddr)
3485 status = target_read_memory (addr, buf, sizeof (buf));
3488 tag = extract_signed_integer (buf, sizeof (buf), byte_order);
3490 if (tag == DT_PLTGOT)
3492 CORE_ADDR global_pointer;
3494 status = target_read_memory (addr + 8, buf, sizeof (buf));
3497 global_pointer = extract_unsigned_integer (buf, sizeof (buf),
3501 return global_pointer;
3514 /* Attempt to find (and return) the global pointer for the given
3515 function. We first try the find_global_pointer_from_solib routine
3516 from the gdbarch tdep vector, if provided. And if that does not
3517 work, then we try ia64_find_global_pointer_from_dynamic_section. */
3520 ia64_find_global_pointer (struct gdbarch *gdbarch, CORE_ADDR faddr)
3522 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
3525 if (tdep->find_global_pointer_from_solib)
3526 addr = tdep->find_global_pointer_from_solib (gdbarch, faddr);
3528 addr = ia64_find_global_pointer_from_dynamic_section (gdbarch, faddr);
3532 /* Given a function's address, attempt to find (and return) the
3533 corresponding (canonical) function descriptor. Return 0 if
3536 find_extant_func_descr (struct gdbarch *gdbarch, CORE_ADDR faddr)
3538 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3539 struct obj_section *faddr_sect;
3541 /* Return early if faddr is already a function descriptor. */
3542 faddr_sect = find_pc_section (faddr);
3543 if (faddr_sect && strcmp (faddr_sect->the_bfd_section->name, ".opd") == 0)
3546 if (faddr_sect != NULL)
3548 struct obj_section *osect;
3549 ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
3551 if (strcmp (osect->the_bfd_section->name, ".opd") == 0)
3555 if (osect < faddr_sect->objfile->sections_end)
3557 CORE_ADDR addr, endaddr;
3559 addr = obj_section_addr (osect);
3560 endaddr = obj_section_endaddr (osect);
3562 while (addr < endaddr)
3568 status = target_read_memory (addr, buf, sizeof (buf));
3571 faddr2 = extract_signed_integer (buf, sizeof (buf), byte_order);
3573 if (faddr == faddr2)
3583 /* Attempt to find a function descriptor corresponding to the
3584 given address. If none is found, construct one on the
3585 stack using the address at fdaptr. */
3588 find_func_descr (struct regcache *regcache, CORE_ADDR faddr, CORE_ADDR *fdaptr)
3590 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3591 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3594 fdesc = find_extant_func_descr (gdbarch, faddr);
3598 ULONGEST global_pointer;
3604 global_pointer = ia64_find_global_pointer (gdbarch, faddr);
3606 if (global_pointer == 0)
3607 regcache_cooked_read_unsigned (regcache,
3608 IA64_GR1_REGNUM, &global_pointer);
3610 store_unsigned_integer (buf, 8, byte_order, faddr);
3611 store_unsigned_integer (buf + 8, 8, byte_order, global_pointer);
3613 write_memory (fdesc, buf, 16);
3619 /* Use the following routine when printing out function pointers
3620 so the user can see the function address rather than just the
3621 function descriptor. */
3623 ia64_convert_from_func_ptr_addr (struct gdbarch *gdbarch, CORE_ADDR addr,
3624 struct target_ops *targ)
3626 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3627 struct obj_section *s;
3630 s = find_pc_section (addr);
3632 /* check if ADDR points to a function descriptor. */
3633 if (s && strcmp (s->the_bfd_section->name, ".opd") == 0)
3634 return read_memory_unsigned_integer (addr, 8, byte_order);
3636 /* Normally, functions live inside a section that is executable.
3637 So, if ADDR points to a non-executable section, then treat it
3638 as a function descriptor and return the target address iff
3639 the target address itself points to a section that is executable.
3640 Check first the memory of the whole length of 8 bytes is readable. */
3641 if (s && (s->the_bfd_section->flags & SEC_CODE) == 0
3642 && target_read_memory (addr, buf, 8) == 0)
3644 CORE_ADDR pc = extract_unsigned_integer (buf, 8, byte_order);
3645 struct obj_section *pc_section = find_pc_section (pc);
3647 if (pc_section && (pc_section->the_bfd_section->flags & SEC_CODE))
3651 /* There are also descriptors embedded in vtables. */
3654 struct bound_minimal_symbol minsym;
3656 minsym = lookup_minimal_symbol_by_pc (addr);
3659 && is_vtable_name (MSYMBOL_LINKAGE_NAME (minsym.minsym)))
3660 return read_memory_unsigned_integer (addr, 8, byte_order);
3667 ia64_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp)
3672 /* The default "allocate_new_rse_frame" ia64_infcall_ops routine for ia64. */
3675 ia64_allocate_new_rse_frame (struct regcache *regcache, ULONGEST bsp, int sof)
3677 ULONGEST cfm, pfs, new_bsp;
3679 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
3681 new_bsp = rse_address_add (bsp, sof);
3682 regcache_cooked_write_unsigned (regcache, IA64_BSP_REGNUM, new_bsp);
3684 regcache_cooked_read_unsigned (regcache, IA64_PFS_REGNUM, &pfs);
3685 pfs &= 0xc000000000000000LL;
3686 pfs |= (cfm & 0xffffffffffffLL);
3687 regcache_cooked_write_unsigned (regcache, IA64_PFS_REGNUM, pfs);
3689 cfm &= 0xc000000000000000LL;
3691 regcache_cooked_write_unsigned (regcache, IA64_CFM_REGNUM, cfm);
3694 /* The default "store_argument_in_slot" ia64_infcall_ops routine for
3698 ia64_store_argument_in_slot (struct regcache *regcache, CORE_ADDR bsp,
3699 int slotnum, gdb_byte *buf)
3701 write_memory (rse_address_add (bsp, slotnum), buf, 8);
3704 /* The default "set_function_addr" ia64_infcall_ops routine for ia64. */
3707 ia64_set_function_addr (struct regcache *regcache, CORE_ADDR func_addr)
3709 /* Nothing needed. */
3713 ia64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
3714 struct regcache *regcache, CORE_ADDR bp_addr,
3715 int nargs, struct value **args, CORE_ADDR sp,
3716 int struct_return, CORE_ADDR struct_addr)
3718 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
3719 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3724 int nslots, rseslots, memslots, slotnum, nfuncargs;
3727 CORE_ADDR funcdescaddr, pc, global_pointer;
3728 CORE_ADDR func_addr = find_function_addr (function, NULL);
3732 /* Count the number of slots needed for the arguments. */
3733 for (argno = 0; argno < nargs; argno++)
3736 type = check_typedef (value_type (arg));
3737 len = TYPE_LENGTH (type);
3739 if ((nslots & 1) && slot_alignment_is_next_even (type))
3742 if (TYPE_CODE (type) == TYPE_CODE_FUNC)
3745 nslots += (len + 7) / 8;
3748 /* Divvy up the slots between the RSE and the memory stack. */
3749 rseslots = (nslots > 8) ? 8 : nslots;
3750 memslots = nslots - rseslots;
3752 /* Allocate a new RSE frame. */
3753 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
3754 tdep->infcall_ops.allocate_new_rse_frame (regcache, bsp, rseslots);
3756 /* We will attempt to find function descriptors in the .opd segment,
3757 but if we can't we'll construct them ourselves. That being the
3758 case, we'll need to reserve space on the stack for them. */
3759 funcdescaddr = sp - nfuncargs * 16;
3760 funcdescaddr &= ~0xfLL;
3762 /* Adjust the stack pointer to it's new value. The calling conventions
3763 require us to have 16 bytes of scratch, plus whatever space is
3764 necessary for the memory slots and our function descriptors. */
3765 sp = sp - 16 - (memslots + nfuncargs) * 8;
3766 sp &= ~0xfLL; /* Maintain 16 byte alignment. */
3768 /* Place the arguments where they belong. The arguments will be
3769 either placed in the RSE backing store or on the memory stack.
3770 In addition, floating point arguments or HFAs are placed in
3771 floating point registers. */
3773 floatreg = IA64_FR8_REGNUM;
3774 for (argno = 0; argno < nargs; argno++)
3776 struct type *float_elt_type;
3779 type = check_typedef (value_type (arg));
3780 len = TYPE_LENGTH (type);
3782 /* Special handling for function parameters. */
3784 && TYPE_CODE (type) == TYPE_CODE_PTR
3785 && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC)
3787 gdb_byte val_buf[8];
3788 ULONGEST faddr = extract_unsigned_integer (value_contents (arg),
3790 store_unsigned_integer (val_buf, 8, byte_order,
3791 find_func_descr (regcache, faddr,
3793 if (slotnum < rseslots)
3794 tdep->infcall_ops.store_argument_in_slot (regcache, bsp,
3797 write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8);
3804 /* Skip odd slot if necessary... */
3805 if ((slotnum & 1) && slot_alignment_is_next_even (type))
3811 gdb_byte val_buf[8];
3813 memset (val_buf, 0, 8);
3814 if (!ia64_struct_type_p (type) && len < 8)
3816 /* Integral types are LSB-aligned, so we have to be careful
3817 to insert the argument on the correct side of the buffer.
3818 This is why we use store_unsigned_integer. */
3819 store_unsigned_integer
3820 (val_buf, 8, byte_order,
3821 extract_unsigned_integer (value_contents (arg), len,
3826 /* This is either an 8bit integral type, or an aggregate.
3827 For 8bit integral type, there is no problem, we just
3828 copy the value over.
3830 For aggregates, the only potentially tricky portion
3831 is to write the last one if it is less than 8 bytes.
3832 In this case, the data is Byte0-aligned. Happy news,
3833 this means that we don't need to differentiate the
3834 handling of 8byte blocks and less-than-8bytes blocks. */
3835 memcpy (val_buf, value_contents (arg) + argoffset,
3836 (len > 8) ? 8 : len);
3839 if (slotnum < rseslots)
3840 tdep->infcall_ops.store_argument_in_slot (regcache, bsp,
3843 write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8);
3850 /* Handle floating point types (including HFAs). */
3851 float_elt_type = is_float_or_hfa_type (type);
3852 if (float_elt_type != NULL)
3855 len = TYPE_LENGTH (type);
3856 while (len > 0 && floatreg < IA64_FR16_REGNUM)
3858 char to[MAX_REGISTER_SIZE];
3859 convert_typed_floating (value_contents (arg) + argoffset,
3861 ia64_ext_type (gdbarch));
3862 regcache_cooked_write (regcache, floatreg, (void *)to);
3864 argoffset += TYPE_LENGTH (float_elt_type);
3865 len -= TYPE_LENGTH (float_elt_type);
3870 /* Store the struct return value in r8 if necessary. */
3873 regcache_cooked_write_unsigned (regcache, IA64_GR8_REGNUM,
3874 (ULONGEST) struct_addr);
3877 global_pointer = ia64_find_global_pointer (gdbarch, func_addr);
3879 if (global_pointer != 0)
3880 regcache_cooked_write_unsigned (regcache, IA64_GR1_REGNUM, global_pointer);
3882 /* The following is not necessary on HP-UX, because we're using
3883 a dummy code sequence pushed on the stack to make the call, and
3884 this sequence doesn't need b0 to be set in order for our dummy
3885 breakpoint to be hit. Nonetheless, this doesn't interfere, and
3886 it's needed for other OSes, so we do this unconditionaly. */
3887 regcache_cooked_write_unsigned (regcache, IA64_BR0_REGNUM, bp_addr);
3889 regcache_cooked_write_unsigned (regcache, sp_regnum, sp);
3891 tdep->infcall_ops.set_function_addr (regcache, func_addr);
3896 static const struct ia64_infcall_ops ia64_infcall_ops =
3898 ia64_allocate_new_rse_frame,
3899 ia64_store_argument_in_slot,
3900 ia64_set_function_addr
3903 static struct frame_id
3904 ia64_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
3906 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3910 get_frame_register (this_frame, sp_regnum, buf);
3911 sp = extract_unsigned_integer (buf, 8, byte_order);
3913 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
3914 bsp = extract_unsigned_integer (buf, 8, byte_order);
3916 if (gdbarch_debug >= 1)
3917 fprintf_unfiltered (gdb_stdlog,
3918 "dummy frame id: code %s, stack %s, special %s\n",
3919 paddress (gdbarch, get_frame_pc (this_frame)),
3920 paddress (gdbarch, sp), paddress (gdbarch, bsp));
3922 return frame_id_build_special (sp, get_frame_pc (this_frame), bsp);
3926 ia64_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
3928 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3930 CORE_ADDR ip, psr, pc;
3932 frame_unwind_register (next_frame, IA64_IP_REGNUM, buf);
3933 ip = extract_unsigned_integer (buf, 8, byte_order);
3934 frame_unwind_register (next_frame, IA64_PSR_REGNUM, buf);
3935 psr = extract_unsigned_integer (buf, 8, byte_order);
3937 pc = (ip & ~0xf) | ((psr >> 41) & 3);
3942 ia64_print_insn (bfd_vma memaddr, struct disassemble_info *info)
3944 info->bytes_per_line = SLOT_MULTIPLIER;
3945 return print_insn_ia64 (memaddr, info);
3948 /* The default "size_of_register_frame" gdbarch_tdep routine for ia64. */
3951 ia64_size_of_register_frame (struct frame_info *this_frame, ULONGEST cfm)
3953 return (cfm & 0x7f);
3956 static struct gdbarch *
3957 ia64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
3959 struct gdbarch *gdbarch;
3960 struct gdbarch_tdep *tdep;
3962 /* If there is already a candidate, use it. */
3963 arches = gdbarch_list_lookup_by_info (arches, &info);
3965 return arches->gdbarch;
3967 tdep = xzalloc (sizeof (struct gdbarch_tdep));
3968 gdbarch = gdbarch_alloc (&info, tdep);
3970 tdep->size_of_register_frame = ia64_size_of_register_frame;
3972 /* According to the ia64 specs, instructions that store long double
3973 floats in memory use a long-double format different than that
3974 used in the floating registers. The memory format matches the
3975 x86 extended float format which is 80 bits. An OS may choose to
3976 use this format (e.g. GNU/Linux) or choose to use a different
3977 format for storing long doubles (e.g. HPUX). In the latter case,
3978 the setting of the format may be moved/overridden in an
3979 OS-specific tdep file. */
3980 set_gdbarch_long_double_format (gdbarch, floatformats_i387_ext);
3982 set_gdbarch_short_bit (gdbarch, 16);
3983 set_gdbarch_int_bit (gdbarch, 32);
3984 set_gdbarch_long_bit (gdbarch, 64);
3985 set_gdbarch_long_long_bit (gdbarch, 64);
3986 set_gdbarch_float_bit (gdbarch, 32);
3987 set_gdbarch_double_bit (gdbarch, 64);
3988 set_gdbarch_long_double_bit (gdbarch, 128);
3989 set_gdbarch_ptr_bit (gdbarch, 64);
3991 set_gdbarch_num_regs (gdbarch, NUM_IA64_RAW_REGS);
3992 set_gdbarch_num_pseudo_regs (gdbarch,
3993 LAST_PSEUDO_REGNUM - FIRST_PSEUDO_REGNUM);
3994 set_gdbarch_sp_regnum (gdbarch, sp_regnum);
3995 set_gdbarch_fp0_regnum (gdbarch, IA64_FR0_REGNUM);
3997 set_gdbarch_register_name (gdbarch, ia64_register_name);
3998 set_gdbarch_register_type (gdbarch, ia64_register_type);
4000 set_gdbarch_pseudo_register_read (gdbarch, ia64_pseudo_register_read);
4001 set_gdbarch_pseudo_register_write (gdbarch, ia64_pseudo_register_write);
4002 set_gdbarch_dwarf2_reg_to_regnum (gdbarch, ia64_dwarf_reg_to_regnum);
4003 set_gdbarch_register_reggroup_p (gdbarch, ia64_register_reggroup_p);
4004 set_gdbarch_convert_register_p (gdbarch, ia64_convert_register_p);
4005 set_gdbarch_register_to_value (gdbarch, ia64_register_to_value);
4006 set_gdbarch_value_to_register (gdbarch, ia64_value_to_register);
4008 set_gdbarch_skip_prologue (gdbarch, ia64_skip_prologue);
4010 set_gdbarch_return_value (gdbarch, ia64_return_value);
4012 set_gdbarch_memory_insert_breakpoint (gdbarch,
4013 ia64_memory_insert_breakpoint);
4014 set_gdbarch_memory_remove_breakpoint (gdbarch,
4015 ia64_memory_remove_breakpoint);
4016 set_gdbarch_breakpoint_from_pc (gdbarch, ia64_breakpoint_from_pc);
4017 set_gdbarch_read_pc (gdbarch, ia64_read_pc);
4018 set_gdbarch_write_pc (gdbarch, ia64_write_pc);
4020 /* Settings for calling functions in the inferior. */
4021 set_gdbarch_push_dummy_call (gdbarch, ia64_push_dummy_call);
4022 tdep->infcall_ops = ia64_infcall_ops;
4023 set_gdbarch_frame_align (gdbarch, ia64_frame_align);
4024 set_gdbarch_dummy_id (gdbarch, ia64_dummy_id);
4026 set_gdbarch_unwind_pc (gdbarch, ia64_unwind_pc);
4027 #ifdef HAVE_LIBUNWIND_IA64_H
4028 frame_unwind_append_unwinder (gdbarch,
4029 &ia64_libunwind_sigtramp_frame_unwind);
4030 frame_unwind_append_unwinder (gdbarch, &ia64_libunwind_frame_unwind);
4031 frame_unwind_append_unwinder (gdbarch, &ia64_sigtramp_frame_unwind);
4032 libunwind_frame_set_descr (gdbarch, &ia64_libunwind_descr);
4034 frame_unwind_append_unwinder (gdbarch, &ia64_sigtramp_frame_unwind);
4036 frame_unwind_append_unwinder (gdbarch, &ia64_frame_unwind);
4037 frame_base_set_default (gdbarch, &ia64_frame_base);
4039 /* Settings that should be unnecessary. */
4040 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
4042 set_gdbarch_print_insn (gdbarch, ia64_print_insn);
4043 set_gdbarch_convert_from_func_ptr_addr (gdbarch,
4044 ia64_convert_from_func_ptr_addr);
4046 /* The virtual table contains 16-byte descriptors, not pointers to
4048 set_gdbarch_vtable_function_descriptors (gdbarch, 1);
4050 /* Hook in ABI-specific overrides, if they have been registered. */
4051 gdbarch_init_osabi (info, gdbarch);
4056 extern initialize_file_ftype _initialize_ia64_tdep; /* -Wmissing-prototypes */
4059 _initialize_ia64_tdep (void)
4061 gdbarch_register (bfd_arch_ia64, ia64_gdbarch_init, NULL);