1 /* Target-dependent code for the IA-64 for GDB, the GNU debugger.
3 Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
4 2009, 2010, 2011 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "arch-utils.h"
25 #include "floatformat.h"
28 #include "reggroups.h"
30 #include "frame-base.h"
31 #include "frame-unwind.h"
34 #include "gdb_assert.h"
36 #include "elf/common.h" /* for DT_PLTGOT value */
41 #include "ia64-tdep.h"
44 #ifdef HAVE_LIBUNWIND_IA64_H
45 #include "elf/ia64.h" /* for PT_IA_64_UNWIND value */
46 #include "libunwind-frame.h"
47 #include "libunwind-ia64.h"
49 /* Note: KERNEL_START is supposed to be an address which is not going
50 to ever contain any valid unwind info. For ia64 linux, the choice
51 of 0xc000000000000000 is fairly safe since that's uncached space.
53 We use KERNEL_START as follows: after obtaining the kernel's
54 unwind table via getunwind(), we project its unwind data into
55 address-range KERNEL_START-(KERNEL_START+ktab_size) and then
56 when ia64_access_mem() sees a memory access to this
57 address-range, we redirect it to ktab instead.
59 None of this hackery is needed with a modern kernel/libcs
60 which uses the kernel virtual DSO to provide access to the
61 kernel's unwind info. In that case, ktab_size remains 0 and
62 hence the value of KERNEL_START doesn't matter. */
64 #define KERNEL_START 0xc000000000000000ULL
66 static size_t ktab_size = 0;
67 struct ia64_table_entry
69 uint64_t start_offset;
74 static struct ia64_table_entry *ktab = NULL;
78 /* An enumeration of the different IA-64 instruction types. */
80 typedef enum instruction_type
82 A, /* Integer ALU ; I-unit or M-unit */
83 I, /* Non-ALU integer; I-unit */
84 M, /* Memory ; M-unit */
85 F, /* Floating-point ; F-unit */
86 B, /* Branch ; B-unit */
87 L, /* Extended (L+X) ; I-unit */
88 X, /* Extended (L+X) ; I-unit */
89 undefined /* undefined or reserved */
92 /* We represent IA-64 PC addresses as the value of the instruction
93 pointer or'd with some bit combination in the low nibble which
94 represents the slot number in the bundle addressed by the
95 instruction pointer. The problem is that the Linux kernel
96 multiplies its slot numbers (for exceptions) by one while the
97 disassembler multiplies its slot numbers by 6. In addition, I've
98 heard it said that the simulator uses 1 as the multiplier.
100 I've fixed the disassembler so that the bytes_per_line field will
101 be the slot multiplier. If bytes_per_line comes in as zero, it
102 is set to six (which is how it was set up initially). -- objdump
103 displays pretty disassembly dumps with this value. For our purposes,
104 we'll set bytes_per_line to SLOT_MULTIPLIER. This is okay since we
105 never want to also display the raw bytes the way objdump does. */
107 #define SLOT_MULTIPLIER 1
109 /* Length in bytes of an instruction bundle. */
111 #define BUNDLE_LEN 16
113 /* See the saved memory layout comment for ia64_memory_insert_breakpoint. */
115 #if BREAKPOINT_MAX < BUNDLE_LEN - 2
116 # error "BREAKPOINT_MAX < BUNDLE_LEN - 2"
119 static gdbarch_init_ftype ia64_gdbarch_init;
121 static gdbarch_register_name_ftype ia64_register_name;
122 static gdbarch_register_type_ftype ia64_register_type;
123 static gdbarch_breakpoint_from_pc_ftype ia64_breakpoint_from_pc;
124 static gdbarch_skip_prologue_ftype ia64_skip_prologue;
125 static struct type *is_float_or_hfa_type (struct type *t);
126 static CORE_ADDR ia64_find_global_pointer (struct gdbarch *gdbarch,
129 #define NUM_IA64_RAW_REGS 462
131 static int sp_regnum = IA64_GR12_REGNUM;
132 static int fp_regnum = IA64_VFP_REGNUM;
133 static int lr_regnum = IA64_VRAP_REGNUM;
135 /* NOTE: we treat the register stack registers r32-r127 as
136 pseudo-registers because they may not be accessible via the ptrace
137 register get/set interfaces. */
139 enum pseudo_regs { FIRST_PSEUDO_REGNUM = NUM_IA64_RAW_REGS,
140 VBOF_REGNUM = IA64_NAT127_REGNUM + 1, V32_REGNUM,
141 V127_REGNUM = V32_REGNUM + 95,
142 VP0_REGNUM, VP16_REGNUM = VP0_REGNUM + 16,
143 VP63_REGNUM = VP0_REGNUM + 63, LAST_PSEUDO_REGNUM };
145 /* Array of register names; There should be ia64_num_regs strings in
148 static char *ia64_register_names[] =
149 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
150 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
151 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
152 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
153 "", "", "", "", "", "", "", "",
154 "", "", "", "", "", "", "", "",
155 "", "", "", "", "", "", "", "",
156 "", "", "", "", "", "", "", "",
157 "", "", "", "", "", "", "", "",
158 "", "", "", "", "", "", "", "",
159 "", "", "", "", "", "", "", "",
160 "", "", "", "", "", "", "", "",
161 "", "", "", "", "", "", "", "",
162 "", "", "", "", "", "", "", "",
163 "", "", "", "", "", "", "", "",
164 "", "", "", "", "", "", "", "",
166 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
167 "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
168 "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
169 "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
170 "f32", "f33", "f34", "f35", "f36", "f37", "f38", "f39",
171 "f40", "f41", "f42", "f43", "f44", "f45", "f46", "f47",
172 "f48", "f49", "f50", "f51", "f52", "f53", "f54", "f55",
173 "f56", "f57", "f58", "f59", "f60", "f61", "f62", "f63",
174 "f64", "f65", "f66", "f67", "f68", "f69", "f70", "f71",
175 "f72", "f73", "f74", "f75", "f76", "f77", "f78", "f79",
176 "f80", "f81", "f82", "f83", "f84", "f85", "f86", "f87",
177 "f88", "f89", "f90", "f91", "f92", "f93", "f94", "f95",
178 "f96", "f97", "f98", "f99", "f100", "f101", "f102", "f103",
179 "f104", "f105", "f106", "f107", "f108", "f109", "f110", "f111",
180 "f112", "f113", "f114", "f115", "f116", "f117", "f118", "f119",
181 "f120", "f121", "f122", "f123", "f124", "f125", "f126", "f127",
183 "", "", "", "", "", "", "", "",
184 "", "", "", "", "", "", "", "",
185 "", "", "", "", "", "", "", "",
186 "", "", "", "", "", "", "", "",
187 "", "", "", "", "", "", "", "",
188 "", "", "", "", "", "", "", "",
189 "", "", "", "", "", "", "", "",
190 "", "", "", "", "", "", "", "",
192 "b0", "b1", "b2", "b3", "b4", "b5", "b6", "b7",
196 "pr", "ip", "psr", "cfm",
198 "kr0", "kr1", "kr2", "kr3", "kr4", "kr5", "kr6", "kr7",
199 "", "", "", "", "", "", "", "",
200 "rsc", "bsp", "bspstore", "rnat",
202 "eflag", "csd", "ssd", "cflg", "fsr", "fir", "fdr", "",
203 "ccv", "", "", "", "unat", "", "", "",
204 "fpsr", "", "", "", "itc",
205 "", "", "", "", "", "", "", "", "", "",
206 "", "", "", "", "", "", "", "", "",
208 "", "", "", "", "", "", "", "", "", "",
209 "", "", "", "", "", "", "", "", "", "",
210 "", "", "", "", "", "", "", "", "", "",
211 "", "", "", "", "", "", "", "", "", "",
212 "", "", "", "", "", "", "", "", "", "",
213 "", "", "", "", "", "", "", "", "", "",
215 "nat0", "nat1", "nat2", "nat3", "nat4", "nat5", "nat6", "nat7",
216 "nat8", "nat9", "nat10", "nat11", "nat12", "nat13", "nat14", "nat15",
217 "nat16", "nat17", "nat18", "nat19", "nat20", "nat21", "nat22", "nat23",
218 "nat24", "nat25", "nat26", "nat27", "nat28", "nat29", "nat30", "nat31",
219 "nat32", "nat33", "nat34", "nat35", "nat36", "nat37", "nat38", "nat39",
220 "nat40", "nat41", "nat42", "nat43", "nat44", "nat45", "nat46", "nat47",
221 "nat48", "nat49", "nat50", "nat51", "nat52", "nat53", "nat54", "nat55",
222 "nat56", "nat57", "nat58", "nat59", "nat60", "nat61", "nat62", "nat63",
223 "nat64", "nat65", "nat66", "nat67", "nat68", "nat69", "nat70", "nat71",
224 "nat72", "nat73", "nat74", "nat75", "nat76", "nat77", "nat78", "nat79",
225 "nat80", "nat81", "nat82", "nat83", "nat84", "nat85", "nat86", "nat87",
226 "nat88", "nat89", "nat90", "nat91", "nat92", "nat93", "nat94", "nat95",
227 "nat96", "nat97", "nat98", "nat99", "nat100","nat101","nat102","nat103",
228 "nat104","nat105","nat106","nat107","nat108","nat109","nat110","nat111",
229 "nat112","nat113","nat114","nat115","nat116","nat117","nat118","nat119",
230 "nat120","nat121","nat122","nat123","nat124","nat125","nat126","nat127",
234 "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39",
235 "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47",
236 "r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55",
237 "r56", "r57", "r58", "r59", "r60", "r61", "r62", "r63",
238 "r64", "r65", "r66", "r67", "r68", "r69", "r70", "r71",
239 "r72", "r73", "r74", "r75", "r76", "r77", "r78", "r79",
240 "r80", "r81", "r82", "r83", "r84", "r85", "r86", "r87",
241 "r88", "r89", "r90", "r91", "r92", "r93", "r94", "r95",
242 "r96", "r97", "r98", "r99", "r100", "r101", "r102", "r103",
243 "r104", "r105", "r106", "r107", "r108", "r109", "r110", "r111",
244 "r112", "r113", "r114", "r115", "r116", "r117", "r118", "r119",
245 "r120", "r121", "r122", "r123", "r124", "r125", "r126", "r127",
247 "p0", "p1", "p2", "p3", "p4", "p5", "p6", "p7",
248 "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15",
249 "p16", "p17", "p18", "p19", "p20", "p21", "p22", "p23",
250 "p24", "p25", "p26", "p27", "p28", "p29", "p30", "p31",
251 "p32", "p33", "p34", "p35", "p36", "p37", "p38", "p39",
252 "p40", "p41", "p42", "p43", "p44", "p45", "p46", "p47",
253 "p48", "p49", "p50", "p51", "p52", "p53", "p54", "p55",
254 "p56", "p57", "p58", "p59", "p60", "p61", "p62", "p63",
257 struct ia64_frame_cache
259 CORE_ADDR base; /* frame pointer base for frame */
260 CORE_ADDR pc; /* function start pc for frame */
261 CORE_ADDR saved_sp; /* stack pointer for frame */
262 CORE_ADDR bsp; /* points at r32 for the current frame */
263 CORE_ADDR cfm; /* cfm value for current frame */
264 CORE_ADDR prev_cfm; /* cfm value for previous frame */
266 int sof; /* Size of frame (decoded from cfm value). */
267 int sol; /* Size of locals (decoded from cfm value). */
268 int sor; /* Number of rotating registers (decoded from
270 CORE_ADDR after_prologue;
271 /* Address of first instruction after the last
272 prologue instruction; Note that there may
273 be instructions from the function's body
274 intermingled with the prologue. */
275 int mem_stack_frame_size;
276 /* Size of the memory stack frame (may be zero),
277 or -1 if it has not been determined yet. */
278 int fp_reg; /* Register number (if any) used a frame pointer
279 for this frame. 0 if no register is being used
280 as the frame pointer. */
282 /* Saved registers. */
283 CORE_ADDR saved_regs[NUM_IA64_RAW_REGS];
288 floatformat_valid (const struct floatformat *fmt, const void *from)
293 static const struct floatformat floatformat_ia64_ext_little =
295 floatformat_little, 82, 0, 1, 17, 65535, 0x1ffff, 18, 64,
296 floatformat_intbit_yes, "floatformat_ia64_ext_little", floatformat_valid, NULL
299 static const struct floatformat floatformat_ia64_ext_big =
301 floatformat_big, 82, 46, 47, 17, 65535, 0x1ffff, 64, 64,
302 floatformat_intbit_yes, "floatformat_ia64_ext_big", floatformat_valid
305 static const struct floatformat *floatformats_ia64_ext[2] =
307 &floatformat_ia64_ext_big,
308 &floatformat_ia64_ext_little
312 ia64_ext_type (struct gdbarch *gdbarch)
314 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
316 if (!tdep->ia64_ext_type)
318 = arch_float_type (gdbarch, 128, "builtin_type_ia64_ext",
319 floatformats_ia64_ext);
321 return tdep->ia64_ext_type;
325 ia64_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
326 struct reggroup *group)
331 if (group == all_reggroup)
333 vector_p = TYPE_VECTOR (register_type (gdbarch, regnum));
334 float_p = TYPE_CODE (register_type (gdbarch, regnum)) == TYPE_CODE_FLT;
335 raw_p = regnum < NUM_IA64_RAW_REGS;
336 if (group == float_reggroup)
338 if (group == vector_reggroup)
340 if (group == general_reggroup)
341 return (!vector_p && !float_p);
342 if (group == save_reggroup || group == restore_reggroup)
348 ia64_register_name (struct gdbarch *gdbarch, int reg)
350 return ia64_register_names[reg];
354 ia64_register_type (struct gdbarch *arch, int reg)
356 if (reg >= IA64_FR0_REGNUM && reg <= IA64_FR127_REGNUM)
357 return ia64_ext_type (arch);
359 return builtin_type (arch)->builtin_long;
363 ia64_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg)
365 if (reg >= IA64_GR32_REGNUM && reg <= IA64_GR127_REGNUM)
366 return V32_REGNUM + (reg - IA64_GR32_REGNUM);
371 /* Extract ``len'' bits from an instruction bundle starting at
375 extract_bit_field (const char *bundle, int from, int len)
377 long long result = 0LL;
379 int from_byte = from / 8;
380 int to_byte = to / 8;
381 unsigned char *b = (unsigned char *) bundle;
387 if (from_byte == to_byte)
388 c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8);
389 result = c >> (from % 8);
390 lshift = 8 - (from % 8);
392 for (i = from_byte+1; i < to_byte; i++)
394 result |= ((long long) b[i]) << lshift;
398 if (from_byte < to_byte && (to % 8 != 0))
401 c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8);
402 result |= ((long long) c) << lshift;
408 /* Replace the specified bits in an instruction bundle. */
411 replace_bit_field (char *bundle, long long val, int from, int len)
414 int from_byte = from / 8;
415 int to_byte = to / 8;
416 unsigned char *b = (unsigned char *) bundle;
419 if (from_byte == to_byte)
421 unsigned char left, right;
423 left = (c >> (to % 8)) << (to % 8);
424 right = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8);
425 c = (unsigned char) (val & 0xff);
426 c = (unsigned char) (c << (from % 8 + 8 - to % 8)) >> (8 - to % 8);
434 c = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8);
435 c = c | (val << (from % 8));
437 val >>= 8 - from % 8;
439 for (i = from_byte+1; i < to_byte; i++)
448 unsigned char cv = (unsigned char) val;
450 c = c >> (to % 8) << (to % 8);
451 c |= ((unsigned char) (cv << (8 - to % 8))) >> (8 - to % 8);
457 /* Return the contents of slot N (for N = 0, 1, or 2) in
458 and instruction bundle. */
461 slotN_contents (char *bundle, int slotnum)
463 return extract_bit_field (bundle, 5+41*slotnum, 41);
466 /* Store an instruction in an instruction bundle. */
469 replace_slotN_contents (char *bundle, long long instr, int slotnum)
471 replace_bit_field (bundle, instr, 5+41*slotnum, 41);
474 static const enum instruction_type template_encoding_table[32][3] =
476 { M, I, I }, /* 00 */
477 { M, I, I }, /* 01 */
478 { M, I, I }, /* 02 */
479 { M, I, I }, /* 03 */
480 { M, L, X }, /* 04 */
481 { M, L, X }, /* 05 */
482 { undefined, undefined, undefined }, /* 06 */
483 { undefined, undefined, undefined }, /* 07 */
484 { M, M, I }, /* 08 */
485 { M, M, I }, /* 09 */
486 { M, M, I }, /* 0A */
487 { M, M, I }, /* 0B */
488 { M, F, I }, /* 0C */
489 { M, F, I }, /* 0D */
490 { M, M, F }, /* 0E */
491 { M, M, F }, /* 0F */
492 { M, I, B }, /* 10 */
493 { M, I, B }, /* 11 */
494 { M, B, B }, /* 12 */
495 { M, B, B }, /* 13 */
496 { undefined, undefined, undefined }, /* 14 */
497 { undefined, undefined, undefined }, /* 15 */
498 { B, B, B }, /* 16 */
499 { B, B, B }, /* 17 */
500 { M, M, B }, /* 18 */
501 { M, M, B }, /* 19 */
502 { undefined, undefined, undefined }, /* 1A */
503 { undefined, undefined, undefined }, /* 1B */
504 { M, F, B }, /* 1C */
505 { M, F, B }, /* 1D */
506 { undefined, undefined, undefined }, /* 1E */
507 { undefined, undefined, undefined }, /* 1F */
510 /* Fetch and (partially) decode an instruction at ADDR and return the
511 address of the next instruction to fetch. */
514 fetch_instruction (CORE_ADDR addr, instruction_type *it, long long *instr)
516 char bundle[BUNDLE_LEN];
517 int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER;
521 /* Warn about slot numbers greater than 2. We used to generate
522 an error here on the assumption that the user entered an invalid
523 address. But, sometimes GDB itself requests an invalid address.
524 This can (easily) happen when execution stops in a function for
525 which there are no symbols. The prologue scanner will attempt to
526 find the beginning of the function - if the nearest symbol
527 happens to not be aligned on a bundle boundary (16 bytes), the
528 resulting starting address will cause GDB to think that the slot
531 So we warn about it and set the slot number to zero. It is
532 not necessarily a fatal condition, particularly if debugging
533 at the assembly language level. */
536 warning (_("Can't fetch instructions for slot numbers greater than 2.\n"
537 "Using slot 0 instead"));
543 val = target_read_memory (addr, bundle, BUNDLE_LEN);
548 *instr = slotN_contents (bundle, slotnum);
549 template = extract_bit_field (bundle, 0, 5);
550 *it = template_encoding_table[(int)template][slotnum];
552 if (slotnum == 2 || (slotnum == 1 && *it == L))
555 addr += (slotnum + 1) * SLOT_MULTIPLIER;
560 /* There are 5 different break instructions (break.i, break.b,
561 break.m, break.f, and break.x), but they all have the same
562 encoding. (The five bit template in the low five bits of the
563 instruction bundle distinguishes one from another.)
565 The runtime architecture manual specifies that break instructions
566 used for debugging purposes must have the upper two bits of the 21
567 bit immediate set to a 0 and a 1 respectively. A breakpoint
568 instruction encodes the most significant bit of its 21 bit
569 immediate at bit 36 of the 41 bit instruction. The penultimate msb
570 is at bit 25 which leads to the pattern below.
572 Originally, I had this set up to do, e.g, a "break.i 0x80000" But
573 it turns out that 0x80000 was used as the syscall break in the early
574 simulators. So I changed the pattern slightly to do "break.i 0x080001"
575 instead. But that didn't work either (I later found out that this
576 pattern was used by the simulator that I was using.) So I ended up
577 using the pattern seen below.
579 SHADOW_CONTENTS has byte-based addressing (PLACED_ADDRESS and SHADOW_LEN)
580 while we need bit-based addressing as the instructions length is 41 bits and
581 we must not modify/corrupt the adjacent slots in the same bundle.
582 Fortunately we may store larger memory incl. the adjacent bits with the
583 original memory content (not the possibly already stored breakpoints there).
584 We need to be careful in ia64_memory_remove_breakpoint to always restore
585 only the specific bits of this instruction ignoring any adjacent stored
588 We use the original addressing with the low nibble in the range <0..2> which
589 gets incorrectly interpreted by generic non-ia64 breakpoint_restore_shadows
590 as the direct byte offset of SHADOW_CONTENTS. We store whole BUNDLE_LEN
591 bytes just without these two possibly skipped bytes to not to exceed to the
594 If we would like to store the whole bundle to SHADOW_CONTENTS we would have
595 to store already the base address (`address & ~0x0f') into PLACED_ADDRESS.
596 In such case there is no other place where to store
597 SLOTNUM (`adress & 0x0f', value in the range <0..2>). We need to know
598 SLOTNUM in ia64_memory_remove_breakpoint.
600 There is one special case where we need to be extra careful:
601 L-X instructions, which are instructions that occupy 2 slots
602 (The L part is always in slot 1, and the X part is always in
603 slot 2). We must refuse to insert breakpoints for an address
604 that points at slot 2 of a bundle where an L-X instruction is
605 present, since there is logically no instruction at that address.
606 However, to make things more interesting, the opcode of L-X
607 instructions is located in slot 2. This means that, to insert
608 a breakpoint at an address that points to slot 1, we actually
609 need to write the breakpoint in slot 2! Slot 1 is actually
610 the extended operand, so writing the breakpoint there would not
611 have the desired effect. Another side-effect of this issue
612 is that we need to make sure that the shadow contents buffer
613 does save byte 15 of our instruction bundle (this is the tail
614 end of slot 2, which wouldn't be saved if we were to insert
615 the breakpoint in slot 1).
617 ia64 16-byte bundle layout:
618 | 5 bits | slot 0 with 41 bits | slot 1 with 41 bits | slot 2 with 41 bits |
620 The current addressing used by the code below:
621 original PC placed_address placed_size required covered
622 == bp_tgt->shadow_len reqd \subset covered
623 0xABCDE0 0xABCDE0 0x10 <0x0...0x5> <0x0..0xF>
624 0xABCDE1 0xABCDE1 0xF <0x5...0xA> <0x1..0xF>
625 0xABCDE2 0xABCDE2 0xE <0xA...0xF> <0x2..0xF>
627 L-X instructions are treated a little specially, as explained above:
628 0xABCDE1 0xABCDE1 0xF <0xA...0xF> <0x1..0xF>
630 `objdump -d' and some other tools show a bit unjustified offsets:
631 original PC byte where starts the instruction objdump offset
632 0xABCDE0 0xABCDE0 0xABCDE0
633 0xABCDE1 0xABCDE5 0xABCDE6
634 0xABCDE2 0xABCDEA 0xABCDEC
637 #define IA64_BREAKPOINT 0x00003333300LL
640 ia64_memory_insert_breakpoint (struct gdbarch *gdbarch,
641 struct bp_target_info *bp_tgt)
643 CORE_ADDR addr = bp_tgt->placed_address;
644 gdb_byte bundle[BUNDLE_LEN];
645 int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER, shadow_slotnum;
646 long long instr_breakpoint;
649 struct cleanup *cleanup;
652 error (_("Can't insert breakpoint for slot numbers greater than 2."));
656 /* Enable the automatic memory restoration from breakpoints while
657 we read our instruction bundle for the purpose of SHADOW_CONTENTS.
658 Otherwise, we could possibly store into the shadow parts of the adjacent
659 placed breakpoints. It is due to our SHADOW_CONTENTS overlapping the real
660 breakpoint instruction bits region. */
661 cleanup = make_show_memory_breakpoints_cleanup (0);
662 val = target_read_memory (addr, bundle, BUNDLE_LEN);
665 do_cleanups (cleanup);
669 /* SHADOW_SLOTNUM saves the original slot number as expected by the caller
670 for addressing the SHADOW_CONTENTS placement. */
671 shadow_slotnum = slotnum;
673 /* Always cover the last byte of the bundle in case we are inserting
674 a breakpoint on an L-X instruction. */
675 bp_tgt->shadow_len = BUNDLE_LEN - shadow_slotnum;
677 template = extract_bit_field (bundle, 0, 5);
678 if (template_encoding_table[template][slotnum] == X)
680 /* X unit types can only be used in slot 2, and are actually
681 part of a 2-slot L-X instruction. We cannot break at this
682 address, as this is the second half of an instruction that
683 lives in slot 1 of that bundle. */
684 gdb_assert (slotnum == 2);
685 error (_("Can't insert breakpoint for non-existing slot X"));
687 if (template_encoding_table[template][slotnum] == L)
689 /* L unit types can only be used in slot 1. But the associated
690 opcode for that instruction is in slot 2, so bump the slot number
692 gdb_assert (slotnum == 1);
696 /* Store the whole bundle, except for the initial skipped bytes by the slot
697 number interpreted as bytes offset in PLACED_ADDRESS. */
698 memcpy (bp_tgt->shadow_contents, bundle + shadow_slotnum,
701 /* Re-read the same bundle as above except that, this time, read it in order
702 to compute the new bundle inside which we will be inserting the
703 breakpoint. Therefore, disable the automatic memory restoration from
704 breakpoints while we read our instruction bundle. Otherwise, the general
705 restoration mechanism kicks in and we would possibly remove parts of the
706 adjacent placed breakpoints. It is due to our SHADOW_CONTENTS overlapping
707 the real breakpoint instruction bits region. */
708 make_show_memory_breakpoints_cleanup (1);
709 val = target_read_memory (addr, bundle, BUNDLE_LEN);
712 do_cleanups (cleanup);
716 /* Breakpoints already present in the code will get deteacted and not get
717 reinserted by bp_loc_is_permanent. Multiple breakpoints at the same
718 location cannot induce the internal error as they are optimized into
719 a single instance by update_global_location_list. */
720 instr_breakpoint = slotN_contents (bundle, slotnum);
721 if (instr_breakpoint == IA64_BREAKPOINT)
722 internal_error (__FILE__, __LINE__,
723 _("Address %s already contains a breakpoint."),
724 paddress (gdbarch, bp_tgt->placed_address));
725 replace_slotN_contents (bundle, IA64_BREAKPOINT, slotnum);
727 bp_tgt->placed_size = bp_tgt->shadow_len;
729 val = target_write_memory (addr + shadow_slotnum, bundle + shadow_slotnum,
732 do_cleanups (cleanup);
737 ia64_memory_remove_breakpoint (struct gdbarch *gdbarch,
738 struct bp_target_info *bp_tgt)
740 CORE_ADDR addr = bp_tgt->placed_address;
741 gdb_byte bundle_mem[BUNDLE_LEN], bundle_saved[BUNDLE_LEN];
742 int slotnum = (addr & 0x0f) / SLOT_MULTIPLIER, shadow_slotnum;
743 long long instr_breakpoint, instr_saved;
746 struct cleanup *cleanup;
750 /* Disable the automatic memory restoration from breakpoints while
751 we read our instruction bundle. Otherwise, the general restoration
752 mechanism kicks in and we would possibly remove parts of the adjacent
753 placed breakpoints. It is due to our SHADOW_CONTENTS overlapping the real
754 breakpoint instruction bits region. */
755 cleanup = make_show_memory_breakpoints_cleanup (1);
756 val = target_read_memory (addr, bundle_mem, BUNDLE_LEN);
759 do_cleanups (cleanup);
763 /* SHADOW_SLOTNUM saves the original slot number as expected by the caller
764 for addressing the SHADOW_CONTENTS placement. */
765 shadow_slotnum = slotnum;
767 template = extract_bit_field (bundle_mem, 0, 5);
768 if (template_encoding_table[template][slotnum] == X)
770 /* X unit types can only be used in slot 2, and are actually
771 part of a 2-slot L-X instruction. We refuse to insert
772 breakpoints at this address, so there should be no reason
773 for us attempting to remove one there, except if the program's
774 code somehow got modified in memory. */
775 gdb_assert (slotnum == 2);
776 warning (_("Cannot remove breakpoint at address %s from non-existing "
777 "X-type slot, memory has changed underneath"),
778 paddress (gdbarch, bp_tgt->placed_address));
779 do_cleanups (cleanup);
782 if (template_encoding_table[template][slotnum] == L)
784 /* L unit types can only be used in slot 1. But the breakpoint
785 was actually saved using slot 2, so update the slot number
787 gdb_assert (slotnum == 1);
791 gdb_assert (bp_tgt->placed_size == BUNDLE_LEN - shadow_slotnum);
792 gdb_assert (bp_tgt->placed_size == bp_tgt->shadow_len);
794 instr_breakpoint = slotN_contents (bundle_mem, slotnum);
795 if (instr_breakpoint != IA64_BREAKPOINT)
797 warning (_("Cannot remove breakpoint at address %s, "
798 "no break instruction at such address."),
799 paddress (gdbarch, bp_tgt->placed_address));
800 do_cleanups (cleanup);
804 /* Extract the original saved instruction from SLOTNUM normalizing its
805 bit-shift for INSTR_SAVED. */
806 memcpy (bundle_saved, bundle_mem, BUNDLE_LEN);
807 memcpy (bundle_saved + shadow_slotnum, bp_tgt->shadow_contents,
809 instr_saved = slotN_contents (bundle_saved, slotnum);
811 /* In BUNDLE_MEM, be careful to modify only the bits belonging to SLOTNUM
812 and not any of the other ones that are stored in SHADOW_CONTENTS. */
813 replace_slotN_contents (bundle_mem, instr_saved, slotnum);
814 val = target_write_memory (addr, bundle_mem, BUNDLE_LEN);
816 do_cleanups (cleanup);
820 /* As gdbarch_breakpoint_from_pc ranges have byte granularity and ia64
821 instruction slots ranges are bit-granular (41 bits) we have to provide an
822 extended range as described for ia64_memory_insert_breakpoint. We also take
823 care of preserving the `break' instruction 21-bit (or 62-bit) parameter to
824 make a match for permanent breakpoints. */
826 static const gdb_byte *
827 ia64_breakpoint_from_pc (struct gdbarch *gdbarch,
828 CORE_ADDR *pcptr, int *lenptr)
830 CORE_ADDR addr = *pcptr;
831 static gdb_byte bundle[BUNDLE_LEN];
832 int slotnum = (int) (*pcptr & 0x0f) / SLOT_MULTIPLIER, shadow_slotnum;
833 long long instr_fetched;
836 struct cleanup *cleanup;
839 error (_("Can't insert breakpoint for slot numbers greater than 2."));
843 /* Enable the automatic memory restoration from breakpoints while
844 we read our instruction bundle to match bp_loc_is_permanent. */
845 cleanup = make_show_memory_breakpoints_cleanup (0);
846 val = target_read_memory (addr, bundle, BUNDLE_LEN);
847 do_cleanups (cleanup);
849 /* The memory might be unreachable. This can happen, for instance,
850 when the user inserts a breakpoint at an invalid address. */
854 /* SHADOW_SLOTNUM saves the original slot number as expected by the caller
855 for addressing the SHADOW_CONTENTS placement. */
856 shadow_slotnum = slotnum;
858 /* Cover always the last byte of the bundle for the L-X slot case. */
859 *lenptr = BUNDLE_LEN - shadow_slotnum;
861 /* Check for L type instruction in slot 1, if present then bump up the slot
862 number to the slot 2. */
863 template = extract_bit_field (bundle, 0, 5);
864 if (template_encoding_table[template][slotnum] == X)
866 gdb_assert (slotnum == 2);
867 error (_("Can't insert breakpoint for non-existing slot X"));
869 if (template_encoding_table[template][slotnum] == L)
871 gdb_assert (slotnum == 1);
875 /* A break instruction has its all its opcode bits cleared except for
876 the parameter value. For L+X slot pair we are at the X slot (slot 2) so
877 we should not touch the L slot - the upper 41 bits of the parameter. */
878 instr_fetched = slotN_contents (bundle, slotnum);
879 instr_fetched &= 0x1003ffffc0LL;
880 replace_slotN_contents (bundle, instr_fetched, slotnum);
882 return bundle + shadow_slotnum;
886 ia64_read_pc (struct regcache *regcache)
888 ULONGEST psr_value, pc_value;
891 regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr_value);
892 regcache_cooked_read_unsigned (regcache, IA64_IP_REGNUM, &pc_value);
893 slot_num = (psr_value >> 41) & 3;
895 return pc_value | (slot_num * SLOT_MULTIPLIER);
899 ia64_write_pc (struct regcache *regcache, CORE_ADDR new_pc)
901 int slot_num = (int) (new_pc & 0xf) / SLOT_MULTIPLIER;
904 regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr_value);
905 psr_value &= ~(3LL << 41);
906 psr_value |= (ULONGEST)(slot_num & 0x3) << 41;
910 regcache_cooked_write_unsigned (regcache, IA64_PSR_REGNUM, psr_value);
911 regcache_cooked_write_unsigned (regcache, IA64_IP_REGNUM, new_pc);
914 #define IS_NaT_COLLECTION_ADDR(addr) ((((addr) >> 3) & 0x3f) == 0x3f)
916 /* Returns the address of the slot that's NSLOTS slots away from
917 the address ADDR. NSLOTS may be positive or negative. */
919 rse_address_add(CORE_ADDR addr, int nslots)
922 int mandatory_nat_slots = nslots / 63;
923 int direction = nslots < 0 ? -1 : 1;
925 new_addr = addr + 8 * (nslots + mandatory_nat_slots);
927 if ((new_addr >> 9) != ((addr + 8 * 64 * mandatory_nat_slots) >> 9))
928 new_addr += 8 * direction;
930 if (IS_NaT_COLLECTION_ADDR(new_addr))
931 new_addr += 8 * direction;
936 static enum register_status
937 ia64_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
938 int regnum, gdb_byte *buf)
940 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
941 enum register_status status;
943 if (regnum >= V32_REGNUM && regnum <= V127_REGNUM)
945 #ifdef HAVE_LIBUNWIND_IA64_H
946 /* First try and use the libunwind special reg accessor,
947 otherwise fallback to standard logic. */
948 if (!libunwind_is_initialized ()
949 || libunwind_get_reg_special (gdbarch, regcache, regnum, buf) != 0)
952 /* The fallback position is to assume that r32-r127 are
953 found sequentially in memory starting at $bof. This
954 isn't always true, but without libunwind, this is the
956 enum register_status status;
961 status = regcache_cooked_read_unsigned (regcache,
962 IA64_BSP_REGNUM, &bsp);
963 if (status != REG_VALID)
966 status = regcache_cooked_read_unsigned (regcache,
967 IA64_CFM_REGNUM, &cfm);
968 if (status != REG_VALID)
971 /* The bsp points at the end of the register frame so we
972 subtract the size of frame from it to get start of
974 bsp = rse_address_add (bsp, -(cfm & 0x7f));
976 if ((cfm & 0x7f) > regnum - V32_REGNUM)
978 ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
979 reg = read_memory_integer ((CORE_ADDR)reg_addr, 8, byte_order);
980 store_unsigned_integer (buf, register_size (gdbarch, regnum),
984 store_unsigned_integer (buf, register_size (gdbarch, regnum),
988 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
992 status = regcache_cooked_read_unsigned (regcache, IA64_UNAT_REGNUM, &unat);
993 if (status != REG_VALID)
995 unatN_val = (unat & (1LL << (regnum - IA64_NAT0_REGNUM))) != 0;
996 store_unsigned_integer (buf, register_size (gdbarch, regnum),
997 byte_order, unatN_val);
999 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
1001 ULONGEST natN_val = 0;
1004 CORE_ADDR gr_addr = 0;
1005 status = regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
1006 if (status != REG_VALID)
1008 status = regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1009 if (status != REG_VALID)
1012 /* The bsp points at the end of the register frame so we
1013 subtract the size of frame from it to get start of register frame. */
1014 bsp = rse_address_add (bsp, -(cfm & 0x7f));
1016 if ((cfm & 0x7f) > regnum - V32_REGNUM)
1017 gr_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
1021 /* Compute address of nat collection bits. */
1022 CORE_ADDR nat_addr = gr_addr | 0x1f8;
1023 CORE_ADDR nat_collection;
1025 /* If our nat collection address is bigger than bsp, we have to get
1026 the nat collection from rnat. Otherwise, we fetch the nat
1027 collection from the computed address. */
1028 if (nat_addr >= bsp)
1029 regcache_cooked_read_unsigned (regcache, IA64_RNAT_REGNUM,
1032 nat_collection = read_memory_integer (nat_addr, 8, byte_order);
1033 nat_bit = (gr_addr >> 3) & 0x3f;
1034 natN_val = (nat_collection >> nat_bit) & 1;
1037 store_unsigned_integer (buf, register_size (gdbarch, regnum),
1038 byte_order, natN_val);
1040 else if (regnum == VBOF_REGNUM)
1042 /* A virtual register frame start is provided for user convenience.
1043 It can be calculated as the bsp - sof (sizeof frame). */
1047 status = regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
1048 if (status != REG_VALID)
1050 status = regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1051 if (status != REG_VALID)
1054 /* The bsp points at the end of the register frame so we
1055 subtract the size of frame from it to get beginning of frame. */
1056 vbsp = rse_address_add (bsp, -(cfm & 0x7f));
1057 store_unsigned_integer (buf, register_size (gdbarch, regnum),
1060 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
1066 status = regcache_cooked_read_unsigned (regcache, IA64_PR_REGNUM, &pr);
1067 if (status != REG_VALID)
1069 status = regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1070 if (status != REG_VALID)
1073 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
1075 /* Fetch predicate register rename base from current frame
1076 marker for this frame. */
1077 int rrb_pr = (cfm >> 32) & 0x3f;
1079 /* Adjust the register number to account for register rotation. */
1080 regnum = VP16_REGNUM
1081 + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
1083 prN_val = (pr & (1LL << (regnum - VP0_REGNUM))) != 0;
1084 store_unsigned_integer (buf, register_size (gdbarch, regnum),
1085 byte_order, prN_val);
1088 memset (buf, 0, register_size (gdbarch, regnum));
1094 ia64_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
1095 int regnum, const gdb_byte *buf)
1097 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1099 if (regnum >= V32_REGNUM && regnum <= V127_REGNUM)
1104 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
1105 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1107 bsp = rse_address_add (bsp, -(cfm & 0x7f));
1109 if ((cfm & 0x7f) > regnum - V32_REGNUM)
1111 ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
1112 write_memory (reg_addr, (void *) buf, 8);
1115 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
1117 ULONGEST unatN_val, unat, unatN_mask;
1118 regcache_cooked_read_unsigned (regcache, IA64_UNAT_REGNUM, &unat);
1119 unatN_val = extract_unsigned_integer (buf, register_size (gdbarch,
1122 unatN_mask = (1LL << (regnum - IA64_NAT0_REGNUM));
1124 unat &= ~unatN_mask;
1125 else if (unatN_val == 1)
1127 regcache_cooked_write_unsigned (regcache, IA64_UNAT_REGNUM, unat);
1129 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
1134 CORE_ADDR gr_addr = 0;
1135 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
1136 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1138 /* The bsp points at the end of the register frame so we
1139 subtract the size of frame from it to get start of register frame. */
1140 bsp = rse_address_add (bsp, -(cfm & 0x7f));
1142 if ((cfm & 0x7f) > regnum - V32_REGNUM)
1143 gr_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
1145 natN_val = extract_unsigned_integer (buf, register_size (gdbarch,
1149 if (gr_addr != 0 && (natN_val == 0 || natN_val == 1))
1151 /* Compute address of nat collection bits. */
1152 CORE_ADDR nat_addr = gr_addr | 0x1f8;
1153 CORE_ADDR nat_collection;
1154 int natN_bit = (gr_addr >> 3) & 0x3f;
1155 ULONGEST natN_mask = (1LL << natN_bit);
1156 /* If our nat collection address is bigger than bsp, we have to get
1157 the nat collection from rnat. Otherwise, we fetch the nat
1158 collection from the computed address. */
1159 if (nat_addr >= bsp)
1161 regcache_cooked_read_unsigned (regcache,
1165 nat_collection |= natN_mask;
1167 nat_collection &= ~natN_mask;
1168 regcache_cooked_write_unsigned (regcache, IA64_RNAT_REGNUM,
1174 nat_collection = read_memory_integer (nat_addr, 8, byte_order);
1176 nat_collection |= natN_mask;
1178 nat_collection &= ~natN_mask;
1179 store_unsigned_integer (nat_buf, register_size (gdbarch, regnum),
1180 byte_order, nat_collection);
1181 write_memory (nat_addr, nat_buf, 8);
1185 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
1192 regcache_cooked_read_unsigned (regcache, IA64_PR_REGNUM, &pr);
1193 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1195 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
1197 /* Fetch predicate register rename base from current frame
1198 marker for this frame. */
1199 int rrb_pr = (cfm >> 32) & 0x3f;
1201 /* Adjust the register number to account for register rotation. */
1202 regnum = VP16_REGNUM
1203 + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
1205 prN_val = extract_unsigned_integer (buf, register_size (gdbarch, regnum),
1207 prN_mask = (1LL << (regnum - VP0_REGNUM));
1210 else if (prN_val == 1)
1212 regcache_cooked_write_unsigned (regcache, IA64_PR_REGNUM, pr);
1216 /* The ia64 needs to convert between various ieee floating-point formats
1217 and the special ia64 floating point register format. */
1220 ia64_convert_register_p (struct gdbarch *gdbarch, int regno, struct type *type)
1222 return (regno >= IA64_FR0_REGNUM && regno <= IA64_FR127_REGNUM
1223 && type != ia64_ext_type (gdbarch));
1227 ia64_register_to_value (struct frame_info *frame, int regnum,
1228 struct type *valtype, gdb_byte *out,
1229 int *optimizedp, int *unavailablep)
1231 struct gdbarch *gdbarch = get_frame_arch (frame);
1232 char in[MAX_REGISTER_SIZE];
1234 /* Convert to TYPE. */
1235 if (!get_frame_register_bytes (frame, regnum, 0,
1236 register_size (gdbarch, regnum),
1237 in, optimizedp, unavailablep))
1240 convert_typed_floating (in, ia64_ext_type (gdbarch), out, valtype);
1241 *optimizedp = *unavailablep = 0;
1246 ia64_value_to_register (struct frame_info *frame, int regnum,
1247 struct type *valtype, const gdb_byte *in)
1249 struct gdbarch *gdbarch = get_frame_arch (frame);
1250 char out[MAX_REGISTER_SIZE];
1251 convert_typed_floating (in, valtype, out, ia64_ext_type (gdbarch));
1252 put_frame_register (frame, regnum, out);
1256 /* Limit the number of skipped non-prologue instructions since examining
1257 of the prologue is expensive. */
1258 static int max_skip_non_prologue_insns = 40;
1260 /* Given PC representing the starting address of a function, and
1261 LIM_PC which is the (sloppy) limit to which to scan when looking
1262 for a prologue, attempt to further refine this limit by using
1263 the line data in the symbol table. If successful, a better guess
1264 on where the prologue ends is returned, otherwise the previous
1265 value of lim_pc is returned. TRUST_LIMIT is a pointer to a flag
1266 which will be set to indicate whether the returned limit may be
1267 used with no further scanning in the event that the function is
1270 /* FIXME: cagney/2004-02-14: This function and logic have largely been
1271 superseded by skip_prologue_using_sal. */
1274 refine_prologue_limit (CORE_ADDR pc, CORE_ADDR lim_pc, int *trust_limit)
1276 struct symtab_and_line prologue_sal;
1277 CORE_ADDR start_pc = pc;
1280 /* The prologue can not possibly go past the function end itself,
1281 so we can already adjust LIM_PC accordingly. */
1282 if (find_pc_partial_function (pc, NULL, NULL, &end_pc) && end_pc < lim_pc)
1285 /* Start off not trusting the limit. */
1288 prologue_sal = find_pc_line (pc, 0);
1289 if (prologue_sal.line != 0)
1292 CORE_ADDR addr = prologue_sal.end;
1294 /* Handle the case in which compiler's optimizer/scheduler
1295 has moved instructions into the prologue. We scan ahead
1296 in the function looking for address ranges whose corresponding
1297 line number is less than or equal to the first one that we
1298 found for the function. (It can be less than when the
1299 scheduler puts a body instruction before the first prologue
1301 for (i = 2 * max_skip_non_prologue_insns;
1302 i > 0 && (lim_pc == 0 || addr < lim_pc);
1305 struct symtab_and_line sal;
1307 sal = find_pc_line (addr, 0);
1310 if (sal.line <= prologue_sal.line
1311 && sal.symtab == prologue_sal.symtab)
1318 if (lim_pc == 0 || prologue_sal.end < lim_pc)
1320 lim_pc = prologue_sal.end;
1321 if (start_pc == get_pc_function_start (lim_pc))
1328 #define isScratch(_regnum_) ((_regnum_) == 2 || (_regnum_) == 3 \
1329 || (8 <= (_regnum_) && (_regnum_) <= 11) \
1330 || (14 <= (_regnum_) && (_regnum_) <= 31))
1331 #define imm9(_instr_) \
1332 ( ((((_instr_) & 0x01000000000LL) ? -1 : 0) << 8) \
1333 | (((_instr_) & 0x00008000000LL) >> 20) \
1334 | (((_instr_) & 0x00000001fc0LL) >> 6))
1336 /* Allocate and initialize a frame cache. */
1338 static struct ia64_frame_cache *
1339 ia64_alloc_frame_cache (void)
1341 struct ia64_frame_cache *cache;
1344 cache = FRAME_OBSTACK_ZALLOC (struct ia64_frame_cache);
1350 cache->prev_cfm = 0;
1356 cache->frameless = 1;
1358 for (i = 0; i < NUM_IA64_RAW_REGS; i++)
1359 cache->saved_regs[i] = 0;
1365 examine_prologue (CORE_ADDR pc, CORE_ADDR lim_pc,
1366 struct frame_info *this_frame,
1367 struct ia64_frame_cache *cache)
1370 CORE_ADDR last_prologue_pc = pc;
1371 instruction_type it;
1376 int unat_save_reg = 0;
1377 int pr_save_reg = 0;
1378 int mem_stack_frame_size = 0;
1380 CORE_ADDR spill_addr = 0;
1383 char reg_contents[256];
1389 CORE_ADDR bof, sor, sol, sof, cfm, rrb_gr;
1391 memset (instores, 0, sizeof instores);
1392 memset (infpstores, 0, sizeof infpstores);
1393 memset (reg_contents, 0, sizeof reg_contents);
1395 if (cache->after_prologue != 0
1396 && cache->after_prologue <= lim_pc)
1397 return cache->after_prologue;
1399 lim_pc = refine_prologue_limit (pc, lim_pc, &trust_limit);
1400 next_pc = fetch_instruction (pc, &it, &instr);
1402 /* We want to check if we have a recognizable function start before we
1403 look ahead for a prologue. */
1404 if (pc < lim_pc && next_pc
1405 && it == M && ((instr & 0x1ee0000003fLL) == 0x02c00000000LL))
1407 /* alloc - start of a regular function. */
1408 int sor = (int) ((instr & 0x00078000000LL) >> 27);
1409 int sol = (int) ((instr & 0x00007f00000LL) >> 20);
1410 int sof = (int) ((instr & 0x000000fe000LL) >> 13);
1411 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1413 /* Verify that the current cfm matches what we think is the
1414 function start. If we have somehow jumped within a function,
1415 we do not want to interpret the prologue and calculate the
1416 addresses of various registers such as the return address.
1417 We will instead treat the frame as frameless. */
1419 (sof == (cache->cfm & 0x7f) &&
1420 sol == ((cache->cfm >> 7) & 0x7f)))
1424 last_prologue_pc = next_pc;
1429 /* Look for a leaf routine. */
1430 if (pc < lim_pc && next_pc
1431 && (it == I || it == M)
1432 && ((instr & 0x1ee00000000LL) == 0x10800000000LL))
1434 /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */
1435 int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13)
1436 | ((instr & 0x001f8000000LL) >> 20)
1437 | ((instr & 0x000000fe000LL) >> 13));
1438 int rM = (int) ((instr & 0x00007f00000LL) >> 20);
1439 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1440 int qp = (int) (instr & 0x0000000003fLL);
1441 if (qp == 0 && rN == 2 && imm == 0 && rM == 12 && fp_reg == 0)
1443 /* mov r2, r12 - beginning of leaf routine. */
1445 last_prologue_pc = next_pc;
1449 /* If we don't recognize a regular function or leaf routine, we are
1455 last_prologue_pc = lim_pc;
1459 /* Loop, looking for prologue instructions, keeping track of
1460 where preserved registers were spilled. */
1463 next_pc = fetch_instruction (pc, &it, &instr);
1467 if (it == B && ((instr & 0x1e1f800003fLL) != 0x04000000000LL))
1469 /* Exit loop upon hitting a non-nop branch instruction. */
1474 else if (((instr & 0x3fLL) != 0LL) &&
1475 (frameless || ret_reg != 0))
1477 /* Exit loop upon hitting a predicated instruction if
1478 we already have the return register or if we are frameless. */
1483 else if (it == I && ((instr & 0x1eff8000000LL) == 0x00188000000LL))
1486 int b2 = (int) ((instr & 0x0000000e000LL) >> 13);
1487 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1488 int qp = (int) (instr & 0x0000000003f);
1490 if (qp == 0 && b2 == 0 && rN >= 32 && ret_reg == 0)
1493 last_prologue_pc = next_pc;
1496 else if ((it == I || it == M)
1497 && ((instr & 0x1ee00000000LL) == 0x10800000000LL))
1499 /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */
1500 int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13)
1501 | ((instr & 0x001f8000000LL) >> 20)
1502 | ((instr & 0x000000fe000LL) >> 13));
1503 int rM = (int) ((instr & 0x00007f00000LL) >> 20);
1504 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1505 int qp = (int) (instr & 0x0000000003fLL);
1507 if (qp == 0 && rN >= 32 && imm == 0 && rM == 12 && fp_reg == 0)
1511 last_prologue_pc = next_pc;
1513 else if (qp == 0 && rN == 12 && rM == 12)
1515 /* adds r12, -mem_stack_frame_size, r12 */
1516 mem_stack_frame_size -= imm;
1517 last_prologue_pc = next_pc;
1519 else if (qp == 0 && rN == 2
1520 && ((rM == fp_reg && fp_reg != 0) || rM == 12))
1522 char buf[MAX_REGISTER_SIZE];
1523 CORE_ADDR saved_sp = 0;
1524 /* adds r2, spilloffset, rFramePointer
1526 adds r2, spilloffset, r12
1528 Get ready for stf.spill or st8.spill instructions.
1529 The address to start spilling at is loaded into r2.
1530 FIXME: Why r2? That's what gcc currently uses; it
1531 could well be different for other compilers. */
1533 /* Hmm... whether or not this will work will depend on
1534 where the pc is. If it's still early in the prologue
1535 this'll be wrong. FIXME */
1538 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1539 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1540 get_frame_register (this_frame, sp_regnum, buf);
1541 saved_sp = extract_unsigned_integer (buf, 8, byte_order);
1543 spill_addr = saved_sp
1544 + (rM == 12 ? 0 : mem_stack_frame_size)
1547 last_prologue_pc = next_pc;
1549 else if (qp == 0 && rM >= 32 && rM < 40 && !instores[rM-32] &&
1550 rN < 256 && imm == 0)
1552 /* mov rN, rM where rM is an input register. */
1553 reg_contents[rN] = rM;
1554 last_prologue_pc = next_pc;
1556 else if (frameless && qp == 0 && rN == fp_reg && imm == 0 &&
1560 last_prologue_pc = next_pc;
1565 && ( ((instr & 0x1efc0000000LL) == 0x0eec0000000LL)
1566 || ((instr & 0x1ffc8000000LL) == 0x0cec0000000LL) ))
1568 /* stf.spill [rN] = fM, imm9
1570 stf.spill [rN] = fM */
1572 int imm = imm9(instr);
1573 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1574 int fM = (int) ((instr & 0x000000fe000LL) >> 13);
1575 int qp = (int) (instr & 0x0000000003fLL);
1576 if (qp == 0 && rN == spill_reg && spill_addr != 0
1577 && ((2 <= fM && fM <= 5) || (16 <= fM && fM <= 31)))
1579 cache->saved_regs[IA64_FR0_REGNUM + fM] = spill_addr;
1581 if ((instr & 0x1efc0000000LL) == 0x0eec0000000LL)
1584 spill_addr = 0; /* last one; must be done. */
1585 last_prologue_pc = next_pc;
1588 else if ((it == M && ((instr & 0x1eff8000000LL) == 0x02110000000LL))
1589 || (it == I && ((instr & 0x1eff8000000LL) == 0x00050000000LL)) )
1595 int arM = (int) ((instr & 0x00007f00000LL) >> 20);
1596 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1597 int qp = (int) (instr & 0x0000000003fLL);
1598 if (qp == 0 && isScratch (rN) && arM == 36 /* ar.unat */)
1600 /* We have something like "mov.m r3 = ar.unat". Remember the
1601 r3 (or whatever) and watch for a store of this register... */
1603 last_prologue_pc = next_pc;
1606 else if (it == I && ((instr & 0x1eff8000000LL) == 0x00198000000LL))
1609 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1610 int qp = (int) (instr & 0x0000000003fLL);
1611 if (qp == 0 && isScratch (rN))
1614 last_prologue_pc = next_pc;
1618 && ( ((instr & 0x1ffc8000000LL) == 0x08cc0000000LL)
1619 || ((instr & 0x1efc0000000LL) == 0x0acc0000000LL)))
1623 st8 [rN] = rM, imm9 */
1624 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1625 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1626 int qp = (int) (instr & 0x0000000003fLL);
1627 int indirect = rM < 256 ? reg_contents[rM] : 0;
1628 if (qp == 0 && rN == spill_reg && spill_addr != 0
1629 && (rM == unat_save_reg || rM == pr_save_reg))
1631 /* We've found a spill of either the UNAT register or the PR
1632 register. (Well, not exactly; what we've actually found is
1633 a spill of the register that UNAT or PR was moved to).
1634 Record that fact and move on... */
1635 if (rM == unat_save_reg)
1637 /* Track UNAT register. */
1638 cache->saved_regs[IA64_UNAT_REGNUM] = spill_addr;
1643 /* Track PR register. */
1644 cache->saved_regs[IA64_PR_REGNUM] = spill_addr;
1647 if ((instr & 0x1efc0000000LL) == 0x0acc0000000LL)
1648 /* st8 [rN] = rM, imm9 */
1649 spill_addr += imm9(instr);
1651 spill_addr = 0; /* Must be done spilling. */
1652 last_prologue_pc = next_pc;
1654 else if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32])
1656 /* Allow up to one store of each input register. */
1657 instores[rM-32] = 1;
1658 last_prologue_pc = next_pc;
1660 else if (qp == 0 && 32 <= indirect && indirect < 40 &&
1661 !instores[indirect-32])
1663 /* Allow an indirect store of an input register. */
1664 instores[indirect-32] = 1;
1665 last_prologue_pc = next_pc;
1668 else if (it == M && ((instr & 0x1ff08000000LL) == 0x08c00000000LL))
1675 Note that the st8 case is handled in the clause above.
1677 Advance over stores of input registers. One store per input
1678 register is permitted. */
1679 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1680 int qp = (int) (instr & 0x0000000003fLL);
1681 int indirect = rM < 256 ? reg_contents[rM] : 0;
1682 if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32])
1684 instores[rM-32] = 1;
1685 last_prologue_pc = next_pc;
1687 else if (qp == 0 && 32 <= indirect && indirect < 40 &&
1688 !instores[indirect-32])
1690 /* Allow an indirect store of an input register. */
1691 instores[indirect-32] = 1;
1692 last_prologue_pc = next_pc;
1695 else if (it == M && ((instr & 0x1ff88000000LL) == 0x0cc80000000LL))
1702 Advance over stores of floating point input registers. Again
1703 one store per register is permitted. */
1704 int fM = (int) ((instr & 0x000000fe000LL) >> 13);
1705 int qp = (int) (instr & 0x0000000003fLL);
1706 if (qp == 0 && 8 <= fM && fM < 16 && !infpstores[fM - 8])
1708 infpstores[fM-8] = 1;
1709 last_prologue_pc = next_pc;
1713 && ( ((instr & 0x1ffc8000000LL) == 0x08ec0000000LL)
1714 || ((instr & 0x1efc0000000LL) == 0x0aec0000000LL)))
1716 /* st8.spill [rN] = rM
1718 st8.spill [rN] = rM, imm9 */
1719 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1720 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1721 int qp = (int) (instr & 0x0000000003fLL);
1722 if (qp == 0 && rN == spill_reg && 4 <= rM && rM <= 7)
1724 /* We've found a spill of one of the preserved general purpose
1725 regs. Record the spill address and advance the spill
1726 register if appropriate. */
1727 cache->saved_regs[IA64_GR0_REGNUM + rM] = spill_addr;
1728 if ((instr & 0x1efc0000000LL) == 0x0aec0000000LL)
1729 /* st8.spill [rN] = rM, imm9 */
1730 spill_addr += imm9(instr);
1732 spill_addr = 0; /* Done spilling. */
1733 last_prologue_pc = next_pc;
1740 /* If not frameless and we aren't called by skip_prologue, then we need
1741 to calculate registers for the previous frame which will be needed
1744 if (!frameless && this_frame)
1746 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1747 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1749 /* Extract the size of the rotating portion of the stack
1750 frame and the register rename base from the current
1756 rrb_gr = (cfm >> 18) & 0x7f;
1758 /* Find the bof (beginning of frame). */
1759 bof = rse_address_add (cache->bsp, -sof);
1761 for (i = 0, addr = bof;
1765 if (IS_NaT_COLLECTION_ADDR (addr))
1769 if (i+32 == cfm_reg)
1770 cache->saved_regs[IA64_CFM_REGNUM] = addr;
1771 if (i+32 == ret_reg)
1772 cache->saved_regs[IA64_VRAP_REGNUM] = addr;
1774 cache->saved_regs[IA64_VFP_REGNUM] = addr;
1777 /* For the previous argument registers we require the previous bof.
1778 If we can't find the previous cfm, then we can do nothing. */
1780 if (cache->saved_regs[IA64_CFM_REGNUM] != 0)
1782 cfm = read_memory_integer (cache->saved_regs[IA64_CFM_REGNUM],
1785 else if (cfm_reg != 0)
1787 get_frame_register (this_frame, cfm_reg, buf);
1788 cfm = extract_unsigned_integer (buf, 8, byte_order);
1790 cache->prev_cfm = cfm;
1794 sor = ((cfm >> 14) & 0xf) * 8;
1796 sol = (cfm >> 7) & 0x7f;
1797 rrb_gr = (cfm >> 18) & 0x7f;
1799 /* The previous bof only requires subtraction of the sol (size of
1800 locals) due to the overlap between output and input of
1801 subsequent frames. */
1802 bof = rse_address_add (bof, -sol);
1804 for (i = 0, addr = bof;
1808 if (IS_NaT_COLLECTION_ADDR (addr))
1813 cache->saved_regs[IA64_GR32_REGNUM
1814 + ((i + (sor - rrb_gr)) % sor)]
1817 cache->saved_regs[IA64_GR32_REGNUM + i] = addr;
1823 /* Try and trust the lim_pc value whenever possible. */
1824 if (trust_limit && lim_pc >= last_prologue_pc)
1825 last_prologue_pc = lim_pc;
1827 cache->frameless = frameless;
1828 cache->after_prologue = last_prologue_pc;
1829 cache->mem_stack_frame_size = mem_stack_frame_size;
1830 cache->fp_reg = fp_reg;
1832 return last_prologue_pc;
1836 ia64_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
1838 struct ia64_frame_cache cache;
1840 cache.after_prologue = 0;
1844 /* Call examine_prologue with - as third argument since we don't
1845 have a next frame pointer to send. */
1846 return examine_prologue (pc, pc+1024, 0, &cache);
1850 /* Normal frames. */
1852 static struct ia64_frame_cache *
1853 ia64_frame_cache (struct frame_info *this_frame, void **this_cache)
1855 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1856 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1857 struct ia64_frame_cache *cache;
1859 CORE_ADDR cfm, sof, sol, bsp, psr;
1865 cache = ia64_alloc_frame_cache ();
1866 *this_cache = cache;
1868 get_frame_register (this_frame, sp_regnum, buf);
1869 cache->saved_sp = extract_unsigned_integer (buf, 8, byte_order);
1871 /* We always want the bsp to point to the end of frame.
1872 This way, we can always get the beginning of frame (bof)
1873 by subtracting frame size. */
1874 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
1875 cache->bsp = extract_unsigned_integer (buf, 8, byte_order);
1877 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
1878 psr = extract_unsigned_integer (buf, 8, byte_order);
1880 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
1881 cfm = extract_unsigned_integer (buf, 8, byte_order);
1883 cache->sof = (cfm & 0x7f);
1884 cache->sol = (cfm >> 7) & 0x7f;
1885 cache->sor = ((cfm >> 14) & 0xf) * 8;
1889 cache->pc = get_frame_func (this_frame);
1892 examine_prologue (cache->pc, get_frame_pc (this_frame), this_frame, cache);
1894 cache->base = cache->saved_sp + cache->mem_stack_frame_size;
1900 ia64_frame_this_id (struct frame_info *this_frame, void **this_cache,
1901 struct frame_id *this_id)
1903 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1904 struct ia64_frame_cache *cache =
1905 ia64_frame_cache (this_frame, this_cache);
1907 /* If outermost frame, mark with null frame id. */
1908 if (cache->base != 0)
1909 (*this_id) = frame_id_build_special (cache->base, cache->pc, cache->bsp);
1910 if (gdbarch_debug >= 1)
1911 fprintf_unfiltered (gdb_stdlog,
1912 "regular frame id: code %s, stack %s, "
1913 "special %s, this_frame %s\n",
1914 paddress (gdbarch, this_id->code_addr),
1915 paddress (gdbarch, this_id->stack_addr),
1916 paddress (gdbarch, cache->bsp),
1917 host_address_to_string (this_frame));
1920 static struct value *
1921 ia64_frame_prev_register (struct frame_info *this_frame, void **this_cache,
1924 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1925 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1926 struct ia64_frame_cache *cache = ia64_frame_cache (this_frame, this_cache);
1929 gdb_assert (regnum >= 0);
1931 if (!target_has_registers)
1932 error (_("No registers."));
1934 if (regnum == gdbarch_sp_regnum (gdbarch))
1935 return frame_unwind_got_constant (this_frame, regnum, cache->base);
1937 else if (regnum == IA64_BSP_REGNUM)
1940 CORE_ADDR prev_cfm, bsp, prev_bsp;
1942 /* We want to calculate the previous bsp as the end of the previous
1943 register stack frame. This corresponds to what the hardware bsp
1944 register will be if we pop the frame back which is why we might
1945 have been called. We know the beginning of the current frame is
1946 cache->bsp - cache->sof. This value in the previous frame points
1947 to the start of the output registers. We can calculate the end of
1948 that frame by adding the size of output:
1949 (sof (size of frame) - sol (size of locals)). */
1950 val = ia64_frame_prev_register (this_frame, this_cache, IA64_CFM_REGNUM);
1951 prev_cfm = extract_unsigned_integer (value_contents_all (val),
1953 bsp = rse_address_add (cache->bsp, -(cache->sof));
1955 rse_address_add (bsp, (prev_cfm & 0x7f) - ((prev_cfm >> 7) & 0x7f));
1957 return frame_unwind_got_constant (this_frame, regnum, prev_bsp);
1960 else if (regnum == IA64_CFM_REGNUM)
1962 CORE_ADDR addr = cache->saved_regs[IA64_CFM_REGNUM];
1965 return frame_unwind_got_memory (this_frame, regnum, addr);
1967 if (cache->prev_cfm)
1968 return frame_unwind_got_constant (this_frame, regnum, cache->prev_cfm);
1970 if (cache->frameless)
1971 return frame_unwind_got_register (this_frame, IA64_PFS_REGNUM,
1973 return frame_unwind_got_register (this_frame, regnum, 0);
1976 else if (regnum == IA64_VFP_REGNUM)
1978 /* If the function in question uses an automatic register (r32-r127)
1979 for the frame pointer, it'll be found by ia64_find_saved_register()
1980 above. If the function lacks one of these frame pointers, we can
1981 still provide a value since we know the size of the frame. */
1982 return frame_unwind_got_constant (this_frame, regnum, cache->base);
1985 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
1987 struct value *pr_val;
1990 pr_val = ia64_frame_prev_register (this_frame, this_cache,
1992 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
1994 /* Fetch predicate register rename base from current frame
1995 marker for this frame. */
1996 int rrb_pr = (cache->cfm >> 32) & 0x3f;
1998 /* Adjust the register number to account for register rotation. */
1999 regnum = VP16_REGNUM + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
2001 prN = extract_bit_field (value_contents_all (pr_val),
2002 regnum - VP0_REGNUM, 1);
2003 return frame_unwind_got_constant (this_frame, regnum, prN);
2006 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
2008 struct value *unat_val;
2010 unat_val = ia64_frame_prev_register (this_frame, this_cache,
2012 unatN = extract_bit_field (value_contents_all (unat_val),
2013 regnum - IA64_NAT0_REGNUM, 1);
2014 return frame_unwind_got_constant (this_frame, regnum, unatN);
2017 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
2020 /* Find address of general register corresponding to nat bit we're
2024 gr_addr = cache->saved_regs[regnum - IA64_NAT0_REGNUM + IA64_GR0_REGNUM];
2028 /* Compute address of nat collection bits. */
2029 CORE_ADDR nat_addr = gr_addr | 0x1f8;
2031 CORE_ADDR nat_collection;
2034 /* If our nat collection address is bigger than bsp, we have to get
2035 the nat collection from rnat. Otherwise, we fetch the nat
2036 collection from the computed address. */
2037 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2038 bsp = extract_unsigned_integer (buf, 8, byte_order);
2039 if (nat_addr >= bsp)
2041 get_frame_register (this_frame, IA64_RNAT_REGNUM, buf);
2042 nat_collection = extract_unsigned_integer (buf, 8, byte_order);
2045 nat_collection = read_memory_integer (nat_addr, 8, byte_order);
2046 nat_bit = (gr_addr >> 3) & 0x3f;
2047 natval = (nat_collection >> nat_bit) & 1;
2050 return frame_unwind_got_constant (this_frame, regnum, natval);
2053 else if (regnum == IA64_IP_REGNUM)
2056 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
2060 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
2061 pc = extract_unsigned_integer (buf, 8, byte_order);
2063 else if (cache->frameless)
2065 get_frame_register (this_frame, IA64_BR0_REGNUM, buf);
2066 pc = extract_unsigned_integer (buf, 8, byte_order);
2069 return frame_unwind_got_constant (this_frame, regnum, pc);
2072 else if (regnum == IA64_PSR_REGNUM)
2074 /* We don't know how to get the complete previous PSR, but we need it
2075 for the slot information when we unwind the pc (pc is formed of IP
2076 register plus slot information from PSR). To get the previous
2077 slot information, we mask it off the return address. */
2078 ULONGEST slot_num = 0;
2081 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
2083 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
2084 psr = extract_unsigned_integer (buf, 8, byte_order);
2088 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
2089 pc = extract_unsigned_integer (buf, 8, byte_order);
2091 else if (cache->frameless)
2093 get_frame_register (this_frame, IA64_BR0_REGNUM, buf);
2094 pc = extract_unsigned_integer (buf, 8, byte_order);
2096 psr &= ~(3LL << 41);
2097 slot_num = pc & 0x3LL;
2098 psr |= (CORE_ADDR)slot_num << 41;
2099 return frame_unwind_got_constant (this_frame, regnum, psr);
2102 else if (regnum == IA64_BR0_REGNUM)
2104 CORE_ADDR addr = cache->saved_regs[IA64_BR0_REGNUM];
2107 return frame_unwind_got_memory (this_frame, regnum, addr);
2109 return frame_unwind_got_constant (this_frame, regnum, 0);
2112 else if ((regnum >= IA64_GR32_REGNUM && regnum <= IA64_GR127_REGNUM)
2113 || (regnum >= V32_REGNUM && regnum <= V127_REGNUM))
2117 if (regnum >= V32_REGNUM)
2118 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
2119 addr = cache->saved_regs[regnum];
2121 return frame_unwind_got_memory (this_frame, regnum, addr);
2123 if (cache->frameless)
2125 struct value *reg_val;
2126 CORE_ADDR prev_cfm, prev_bsp, prev_bof;
2128 /* FIXME: brobecker/2008-05-01: Doesn't this seem redundant
2129 with the same code above? */
2130 if (regnum >= V32_REGNUM)
2131 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
2132 reg_val = ia64_frame_prev_register (this_frame, this_cache,
2134 prev_cfm = extract_unsigned_integer (value_contents_all (reg_val),
2136 reg_val = ia64_frame_prev_register (this_frame, this_cache,
2138 prev_bsp = extract_unsigned_integer (value_contents_all (reg_val),
2140 prev_bof = rse_address_add (prev_bsp, -(prev_cfm & 0x7f));
2142 addr = rse_address_add (prev_bof, (regnum - IA64_GR32_REGNUM));
2143 return frame_unwind_got_memory (this_frame, regnum, addr);
2146 return frame_unwind_got_constant (this_frame, regnum, 0);
2149 else /* All other registers. */
2153 if (IA64_FR32_REGNUM <= regnum && regnum <= IA64_FR127_REGNUM)
2155 /* Fetch floating point register rename base from current
2156 frame marker for this frame. */
2157 int rrb_fr = (cache->cfm >> 25) & 0x7f;
2159 /* Adjust the floating point register number to account for
2160 register rotation. */
2161 regnum = IA64_FR32_REGNUM
2162 + ((regnum - IA64_FR32_REGNUM) + rrb_fr) % 96;
2165 /* If we have stored a memory address, access the register. */
2166 addr = cache->saved_regs[regnum];
2168 return frame_unwind_got_memory (this_frame, regnum, addr);
2169 /* Otherwise, punt and get the current value of the register. */
2171 return frame_unwind_got_register (this_frame, regnum, regnum);
2175 static const struct frame_unwind ia64_frame_unwind =
2178 default_frame_unwind_stop_reason,
2179 &ia64_frame_this_id,
2180 &ia64_frame_prev_register,
2182 default_frame_sniffer
2185 /* Signal trampolines. */
2188 ia64_sigtramp_frame_init_saved_regs (struct frame_info *this_frame,
2189 struct ia64_frame_cache *cache)
2191 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2192 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
2194 if (tdep->sigcontext_register_address)
2198 cache->saved_regs[IA64_VRAP_REGNUM]
2199 = tdep->sigcontext_register_address (gdbarch, cache->base,
2201 cache->saved_regs[IA64_CFM_REGNUM]
2202 = tdep->sigcontext_register_address (gdbarch, cache->base,
2204 cache->saved_regs[IA64_PSR_REGNUM]
2205 = tdep->sigcontext_register_address (gdbarch, cache->base,
2207 cache->saved_regs[IA64_BSP_REGNUM]
2208 = tdep->sigcontext_register_address (gdbarch, cache->base,
2210 cache->saved_regs[IA64_RNAT_REGNUM]
2211 = tdep->sigcontext_register_address (gdbarch, cache->base,
2213 cache->saved_regs[IA64_CCV_REGNUM]
2214 = tdep->sigcontext_register_address (gdbarch, cache->base,
2216 cache->saved_regs[IA64_UNAT_REGNUM]
2217 = tdep->sigcontext_register_address (gdbarch, cache->base,
2219 cache->saved_regs[IA64_FPSR_REGNUM]
2220 = tdep->sigcontext_register_address (gdbarch, cache->base,
2222 cache->saved_regs[IA64_PFS_REGNUM]
2223 = tdep->sigcontext_register_address (gdbarch, cache->base,
2225 cache->saved_regs[IA64_LC_REGNUM]
2226 = tdep->sigcontext_register_address (gdbarch, cache->base,
2229 for (regno = IA64_GR1_REGNUM; regno <= IA64_GR31_REGNUM; regno++)
2230 cache->saved_regs[regno] =
2231 tdep->sigcontext_register_address (gdbarch, cache->base, regno);
2232 for (regno = IA64_BR0_REGNUM; regno <= IA64_BR7_REGNUM; regno++)
2233 cache->saved_regs[regno] =
2234 tdep->sigcontext_register_address (gdbarch, cache->base, regno);
2235 for (regno = IA64_FR2_REGNUM; regno <= IA64_FR31_REGNUM; regno++)
2236 cache->saved_regs[regno] =
2237 tdep->sigcontext_register_address (gdbarch, cache->base, regno);
2241 static struct ia64_frame_cache *
2242 ia64_sigtramp_frame_cache (struct frame_info *this_frame, void **this_cache)
2244 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2245 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2246 struct ia64_frame_cache *cache;
2254 cache = ia64_alloc_frame_cache ();
2256 get_frame_register (this_frame, sp_regnum, buf);
2257 /* Note that frame size is hard-coded below. We cannot calculate it
2258 via prologue examination. */
2259 cache->base = extract_unsigned_integer (buf, 8, byte_order) + 16;
2261 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2262 cache->bsp = extract_unsigned_integer (buf, 8, byte_order);
2264 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2265 cache->cfm = extract_unsigned_integer (buf, 8, byte_order);
2266 cache->sof = cache->cfm & 0x7f;
2268 ia64_sigtramp_frame_init_saved_regs (this_frame, cache);
2270 *this_cache = cache;
2275 ia64_sigtramp_frame_this_id (struct frame_info *this_frame,
2276 void **this_cache, struct frame_id *this_id)
2278 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2279 struct ia64_frame_cache *cache =
2280 ia64_sigtramp_frame_cache (this_frame, this_cache);
2282 (*this_id) = frame_id_build_special (cache->base,
2283 get_frame_pc (this_frame),
2285 if (gdbarch_debug >= 1)
2286 fprintf_unfiltered (gdb_stdlog,
2287 "sigtramp frame id: code %s, stack %s, "
2288 "special %s, this_frame %s\n",
2289 paddress (gdbarch, this_id->code_addr),
2290 paddress (gdbarch, this_id->stack_addr),
2291 paddress (gdbarch, cache->bsp),
2292 host_address_to_string (this_frame));
2295 static struct value *
2296 ia64_sigtramp_frame_prev_register (struct frame_info *this_frame,
2297 void **this_cache, int regnum)
2299 char buf[MAX_REGISTER_SIZE];
2301 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2302 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2303 struct ia64_frame_cache *cache =
2304 ia64_sigtramp_frame_cache (this_frame, this_cache);
2306 gdb_assert (regnum >= 0);
2308 if (!target_has_registers)
2309 error (_("No registers."));
2311 if (regnum == IA64_IP_REGNUM)
2314 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
2318 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
2319 pc = extract_unsigned_integer (buf, 8, byte_order);
2322 return frame_unwind_got_constant (this_frame, regnum, pc);
2325 else if ((regnum >= IA64_GR32_REGNUM && regnum <= IA64_GR127_REGNUM)
2326 || (regnum >= V32_REGNUM && regnum <= V127_REGNUM))
2330 if (regnum >= V32_REGNUM)
2331 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
2332 addr = cache->saved_regs[regnum];
2334 return frame_unwind_got_memory (this_frame, regnum, addr);
2336 return frame_unwind_got_constant (this_frame, regnum, 0);
2339 else /* All other registers not listed above. */
2341 CORE_ADDR addr = cache->saved_regs[regnum];
2344 return frame_unwind_got_memory (this_frame, regnum, addr);
2346 return frame_unwind_got_constant (this_frame, regnum, 0);
2351 ia64_sigtramp_frame_sniffer (const struct frame_unwind *self,
2352 struct frame_info *this_frame,
2355 struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame));
2356 if (tdep->pc_in_sigtramp)
2358 CORE_ADDR pc = get_frame_pc (this_frame);
2360 if (tdep->pc_in_sigtramp (pc))
2367 static const struct frame_unwind ia64_sigtramp_frame_unwind =
2370 default_frame_unwind_stop_reason,
2371 ia64_sigtramp_frame_this_id,
2372 ia64_sigtramp_frame_prev_register,
2374 ia64_sigtramp_frame_sniffer
2380 ia64_frame_base_address (struct frame_info *this_frame, void **this_cache)
2382 struct ia64_frame_cache *cache = ia64_frame_cache (this_frame, this_cache);
2387 static const struct frame_base ia64_frame_base =
2390 ia64_frame_base_address,
2391 ia64_frame_base_address,
2392 ia64_frame_base_address
2395 #ifdef HAVE_LIBUNWIND_IA64_H
2397 struct ia64_unwind_table_entry
2399 unw_word_t start_offset;
2400 unw_word_t end_offset;
2401 unw_word_t info_offset;
2404 static __inline__ uint64_t
2405 ia64_rse_slot_num (uint64_t addr)
2407 return (addr >> 3) & 0x3f;
2410 /* Skip over a designated number of registers in the backing
2411 store, remembering every 64th position is for NAT. */
2412 static __inline__ uint64_t
2413 ia64_rse_skip_regs (uint64_t addr, long num_regs)
2415 long delta = ia64_rse_slot_num(addr) + num_regs;
2419 return addr + ((num_regs + delta/0x3f) << 3);
2422 /* Gdb libunwind-frame callback function to convert from an ia64 gdb register
2423 number to a libunwind register number. */
2425 ia64_gdb2uw_regnum (int regnum)
2427 if (regnum == sp_regnum)
2429 else if (regnum == IA64_BSP_REGNUM)
2430 return UNW_IA64_BSP;
2431 else if ((unsigned) (regnum - IA64_GR0_REGNUM) < 128)
2432 return UNW_IA64_GR + (regnum - IA64_GR0_REGNUM);
2433 else if ((unsigned) (regnum - V32_REGNUM) < 95)
2434 return UNW_IA64_GR + 32 + (regnum - V32_REGNUM);
2435 else if ((unsigned) (regnum - IA64_FR0_REGNUM) < 128)
2436 return UNW_IA64_FR + (regnum - IA64_FR0_REGNUM);
2437 else if ((unsigned) (regnum - IA64_PR0_REGNUM) < 64)
2439 else if ((unsigned) (regnum - IA64_BR0_REGNUM) < 8)
2440 return UNW_IA64_BR + (regnum - IA64_BR0_REGNUM);
2441 else if (regnum == IA64_PR_REGNUM)
2443 else if (regnum == IA64_IP_REGNUM)
2445 else if (regnum == IA64_CFM_REGNUM)
2446 return UNW_IA64_CFM;
2447 else if ((unsigned) (regnum - IA64_AR0_REGNUM) < 128)
2448 return UNW_IA64_AR + (regnum - IA64_AR0_REGNUM);
2449 else if ((unsigned) (regnum - IA64_NAT0_REGNUM) < 128)
2450 return UNW_IA64_NAT + (regnum - IA64_NAT0_REGNUM);
2455 /* Gdb libunwind-frame callback function to convert from a libunwind register
2456 number to a ia64 gdb register number. */
2458 ia64_uw2gdb_regnum (int uw_regnum)
2460 if (uw_regnum == UNW_IA64_SP)
2462 else if (uw_regnum == UNW_IA64_BSP)
2463 return IA64_BSP_REGNUM;
2464 else if ((unsigned) (uw_regnum - UNW_IA64_GR) < 32)
2465 return IA64_GR0_REGNUM + (uw_regnum - UNW_IA64_GR);
2466 else if ((unsigned) (uw_regnum - UNW_IA64_GR) < 128)
2467 return V32_REGNUM + (uw_regnum - (IA64_GR0_REGNUM + 32));
2468 else if ((unsigned) (uw_regnum - UNW_IA64_FR) < 128)
2469 return IA64_FR0_REGNUM + (uw_regnum - UNW_IA64_FR);
2470 else if ((unsigned) (uw_regnum - UNW_IA64_BR) < 8)
2471 return IA64_BR0_REGNUM + (uw_regnum - UNW_IA64_BR);
2472 else if (uw_regnum == UNW_IA64_PR)
2473 return IA64_PR_REGNUM;
2474 else if (uw_regnum == UNW_REG_IP)
2475 return IA64_IP_REGNUM;
2476 else if (uw_regnum == UNW_IA64_CFM)
2477 return IA64_CFM_REGNUM;
2478 else if ((unsigned) (uw_regnum - UNW_IA64_AR) < 128)
2479 return IA64_AR0_REGNUM + (uw_regnum - UNW_IA64_AR);
2480 else if ((unsigned) (uw_regnum - UNW_IA64_NAT) < 128)
2481 return IA64_NAT0_REGNUM + (uw_regnum - UNW_IA64_NAT);
2486 /* Gdb libunwind-frame callback function to reveal if register is a float
2489 ia64_is_fpreg (int uw_regnum)
2491 return unw_is_fpreg (uw_regnum);
2494 /* Libunwind callback accessor function for general registers. */
2496 ia64_access_reg (unw_addr_space_t as, unw_regnum_t uw_regnum, unw_word_t *val,
2497 int write, void *arg)
2499 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2500 unw_word_t bsp, sof, sol, cfm, psr, ip;
2501 struct frame_info *this_frame = arg;
2502 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2503 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2504 long new_sof, old_sof;
2505 char buf[MAX_REGISTER_SIZE];
2507 /* We never call any libunwind routines that need to write registers. */
2508 gdb_assert (!write);
2513 /* Libunwind expects to see the pc value which means the slot number
2514 from the psr must be merged with the ip word address. */
2515 get_frame_register (this_frame, IA64_IP_REGNUM, buf);
2516 ip = extract_unsigned_integer (buf, 8, byte_order);
2517 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
2518 psr = extract_unsigned_integer (buf, 8, byte_order);
2519 *val = ip | ((psr >> 41) & 0x3);
2522 case UNW_IA64_AR_BSP:
2523 /* Libunwind expects to see the beginning of the current
2524 register frame so we must account for the fact that
2525 ptrace() will return a value for bsp that points *after*
2526 the current register frame. */
2527 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2528 bsp = extract_unsigned_integer (buf, 8, byte_order);
2529 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2530 cfm = extract_unsigned_integer (buf, 8, byte_order);
2531 sof = gdbarch_tdep (gdbarch)->size_of_register_frame (this_frame, cfm);
2532 *val = ia64_rse_skip_regs (bsp, -sof);
2535 case UNW_IA64_AR_BSPSTORE:
2536 /* Libunwind wants bspstore to be after the current register frame.
2537 This is what ptrace() and gdb treats as the regular bsp value. */
2538 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2539 *val = extract_unsigned_integer (buf, 8, byte_order);
2543 /* For all other registers, just unwind the value directly. */
2544 get_frame_register (this_frame, regnum, buf);
2545 *val = extract_unsigned_integer (buf, 8, byte_order);
2549 if (gdbarch_debug >= 1)
2550 fprintf_unfiltered (gdb_stdlog,
2551 " access_reg: from cache: %4s=%s\n",
2552 (((unsigned) regnum <= IA64_NAT127_REGNUM)
2553 ? ia64_register_names[regnum] : "r??"),
2554 paddress (gdbarch, *val));
2558 /* Libunwind callback accessor function for floating-point registers. */
2560 ia64_access_fpreg (unw_addr_space_t as, unw_regnum_t uw_regnum,
2561 unw_fpreg_t *val, int write, void *arg)
2563 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2564 struct frame_info *this_frame = arg;
2566 /* We never call any libunwind routines that need to write registers. */
2567 gdb_assert (!write);
2569 get_frame_register (this_frame, regnum, (char *) val);
2574 /* Libunwind callback accessor function for top-level rse registers. */
2576 ia64_access_rse_reg (unw_addr_space_t as, unw_regnum_t uw_regnum,
2577 unw_word_t *val, int write, void *arg)
2579 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2580 unw_word_t bsp, sof, sol, cfm, psr, ip;
2581 struct regcache *regcache = arg;
2582 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2583 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2584 long new_sof, old_sof;
2585 char buf[MAX_REGISTER_SIZE];
2587 /* We never call any libunwind routines that need to write registers. */
2588 gdb_assert (!write);
2593 /* Libunwind expects to see the pc value which means the slot number
2594 from the psr must be merged with the ip word address. */
2595 regcache_cooked_read (regcache, IA64_IP_REGNUM, buf);
2596 ip = extract_unsigned_integer (buf, 8, byte_order);
2597 regcache_cooked_read (regcache, IA64_PSR_REGNUM, buf);
2598 psr = extract_unsigned_integer (buf, 8, byte_order);
2599 *val = ip | ((psr >> 41) & 0x3);
2602 case UNW_IA64_AR_BSP:
2603 /* Libunwind expects to see the beginning of the current
2604 register frame so we must account for the fact that
2605 ptrace() will return a value for bsp that points *after*
2606 the current register frame. */
2607 regcache_cooked_read (regcache, IA64_BSP_REGNUM, buf);
2608 bsp = extract_unsigned_integer (buf, 8, byte_order);
2609 regcache_cooked_read (regcache, IA64_CFM_REGNUM, buf);
2610 cfm = extract_unsigned_integer (buf, 8, byte_order);
2612 *val = ia64_rse_skip_regs (bsp, -sof);
2615 case UNW_IA64_AR_BSPSTORE:
2616 /* Libunwind wants bspstore to be after the current register frame.
2617 This is what ptrace() and gdb treats as the regular bsp value. */
2618 regcache_cooked_read (regcache, IA64_BSP_REGNUM, buf);
2619 *val = extract_unsigned_integer (buf, 8, byte_order);
2623 /* For all other registers, just unwind the value directly. */
2624 regcache_cooked_read (regcache, regnum, buf);
2625 *val = extract_unsigned_integer (buf, 8, byte_order);
2629 if (gdbarch_debug >= 1)
2630 fprintf_unfiltered (gdb_stdlog,
2631 " access_rse_reg: from cache: %4s=%s\n",
2632 (((unsigned) regnum <= IA64_NAT127_REGNUM)
2633 ? ia64_register_names[regnum] : "r??"),
2634 paddress (gdbarch, *val));
2639 /* Libunwind callback accessor function for top-level fp registers. */
2641 ia64_access_rse_fpreg (unw_addr_space_t as, unw_regnum_t uw_regnum,
2642 unw_fpreg_t *val, int write, void *arg)
2644 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2645 struct regcache *regcache = arg;
2647 /* We never call any libunwind routines that need to write registers. */
2648 gdb_assert (!write);
2650 regcache_cooked_read (regcache, regnum, (char *) val);
2655 /* Libunwind callback accessor function for accessing memory. */
2657 ia64_access_mem (unw_addr_space_t as,
2658 unw_word_t addr, unw_word_t *val,
2659 int write, void *arg)
2661 if (addr - KERNEL_START < ktab_size)
2663 unw_word_t *laddr = (unw_word_t*) ((char *) ktab
2664 + (addr - KERNEL_START));
2673 /* XXX do we need to normalize byte-order here? */
2675 return target_write_memory (addr, (char *) val, sizeof (unw_word_t));
2677 return target_read_memory (addr, (char *) val, sizeof (unw_word_t));
2680 /* Call low-level function to access the kernel unwind table. */
2682 getunwind_table (gdb_byte **buf_p)
2686 /* FIXME drow/2005-09-10: This code used to call
2687 ia64_linux_xfer_unwind_table directly to fetch the unwind table
2688 for the currently running ia64-linux kernel. That data should
2689 come from the core file and be accessed via the auxv vector; if
2690 we want to preserve fall back to the running kernel's table, then
2691 we should find a way to override the corefile layer's
2692 xfer_partial method. */
2694 x = target_read_alloc (¤t_target, TARGET_OBJECT_UNWIND_TABLE,
2700 /* Get the kernel unwind table. */
2702 get_kernel_table (unw_word_t ip, unw_dyn_info_t *di)
2704 static struct ia64_table_entry *etab;
2711 size = getunwind_table (&ktab_buf);
2713 return -UNW_ENOINFO;
2715 ktab = (struct ia64_table_entry *) ktab_buf;
2718 for (etab = ktab; etab->start_offset; ++etab)
2719 etab->info_offset += KERNEL_START;
2722 if (ip < ktab[0].start_offset || ip >= etab[-1].end_offset)
2723 return -UNW_ENOINFO;
2725 di->format = UNW_INFO_FORMAT_TABLE;
2727 di->start_ip = ktab[0].start_offset;
2728 di->end_ip = etab[-1].end_offset;
2729 di->u.ti.name_ptr = (unw_word_t) "<kernel>";
2730 di->u.ti.segbase = 0;
2731 di->u.ti.table_len = ((char *) etab - (char *) ktab) / sizeof (unw_word_t);
2732 di->u.ti.table_data = (unw_word_t *) ktab;
2734 if (gdbarch_debug >= 1)
2735 fprintf_unfiltered (gdb_stdlog, "get_kernel_table: found table `%s': "
2736 "segbase=%s, length=%s, gp=%s\n",
2737 (char *) di->u.ti.name_ptr,
2738 hex_string (di->u.ti.segbase),
2739 pulongest (di->u.ti.table_len),
2740 hex_string (di->gp));
2744 /* Find the unwind table entry for a specified address. */
2746 ia64_find_unwind_table (struct objfile *objfile, unw_word_t ip,
2747 unw_dyn_info_t *dip, void **buf)
2749 Elf_Internal_Phdr *phdr, *p_text = NULL, *p_unwind = NULL;
2750 Elf_Internal_Ehdr *ehdr;
2751 unw_word_t segbase = 0;
2752 CORE_ADDR load_base;
2756 bfd = objfile->obfd;
2758 ehdr = elf_tdata (bfd)->elf_header;
2759 phdr = elf_tdata (bfd)->phdr;
2761 load_base = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2763 for (i = 0; i < ehdr->e_phnum; ++i)
2765 switch (phdr[i].p_type)
2768 if ((unw_word_t) (ip - load_base - phdr[i].p_vaddr)
2773 case PT_IA_64_UNWIND:
2774 p_unwind = phdr + i;
2782 if (!p_text || !p_unwind)
2783 return -UNW_ENOINFO;
2785 /* Verify that the segment that contains the IP also contains
2786 the static unwind table. If not, we may be in the Linux kernel's
2787 DSO gate page in which case the unwind table is another segment.
2788 Otherwise, we are dealing with runtime-generated code, for which we
2789 have no info here. */
2790 segbase = p_text->p_vaddr + load_base;
2792 if ((p_unwind->p_vaddr - p_text->p_vaddr) >= p_text->p_memsz)
2795 for (i = 0; i < ehdr->e_phnum; ++i)
2797 if (phdr[i].p_type == PT_LOAD
2798 && (p_unwind->p_vaddr - phdr[i].p_vaddr) < phdr[i].p_memsz)
2801 /* Get the segbase from the section containing the
2803 segbase = phdr[i].p_vaddr + load_base;
2807 return -UNW_ENOINFO;
2810 dip->start_ip = p_text->p_vaddr + load_base;
2811 dip->end_ip = dip->start_ip + p_text->p_memsz;
2812 dip->gp = ia64_find_global_pointer (get_objfile_arch (objfile), ip);
2813 dip->format = UNW_INFO_FORMAT_REMOTE_TABLE;
2814 dip->u.rti.name_ptr = (unw_word_t) bfd_get_filename (bfd);
2815 dip->u.rti.segbase = segbase;
2816 dip->u.rti.table_len = p_unwind->p_memsz / sizeof (unw_word_t);
2817 dip->u.rti.table_data = p_unwind->p_vaddr + load_base;
2822 /* Libunwind callback accessor function to acquire procedure unwind-info. */
2824 ia64_find_proc_info_x (unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
2825 int need_unwind_info, void *arg)
2827 struct obj_section *sec = find_pc_section (ip);
2834 /* XXX This only works if the host and the target architecture are
2835 both ia64 and if the have (more or less) the same kernel
2837 if (get_kernel_table (ip, &di) < 0)
2838 return -UNW_ENOINFO;
2840 if (gdbarch_debug >= 1)
2841 fprintf_unfiltered (gdb_stdlog, "ia64_find_proc_info_x: %s -> "
2842 "(name=`%s',segbase=%s,start=%s,end=%s,gp=%s,"
2843 "length=%s,data=%s)\n",
2844 hex_string (ip), (char *)di.u.ti.name_ptr,
2845 hex_string (di.u.ti.segbase),
2846 hex_string (di.start_ip), hex_string (di.end_ip),
2848 pulongest (di.u.ti.table_len),
2849 hex_string ((CORE_ADDR)di.u.ti.table_data));
2853 ret = ia64_find_unwind_table (sec->objfile, ip, &di, &buf);
2857 if (gdbarch_debug >= 1)
2858 fprintf_unfiltered (gdb_stdlog, "ia64_find_proc_info_x: %s -> "
2859 "(name=`%s',segbase=%s,start=%s,end=%s,gp=%s,"
2860 "length=%s,data=%s)\n",
2861 hex_string (ip), (char *)di.u.rti.name_ptr,
2862 hex_string (di.u.rti.segbase),
2863 hex_string (di.start_ip), hex_string (di.end_ip),
2865 pulongest (di.u.rti.table_len),
2866 hex_string (di.u.rti.table_data));
2869 ret = libunwind_search_unwind_table (&as, ip, &di, pi, need_unwind_info,
2872 /* We no longer need the dyn info storage so free it. */
2878 /* Libunwind callback accessor function for cleanup. */
2880 ia64_put_unwind_info (unw_addr_space_t as,
2881 unw_proc_info_t *pip, void *arg)
2883 /* Nothing required for now. */
2886 /* Libunwind callback accessor function to get head of the dynamic
2887 unwind-info registration list. */
2889 ia64_get_dyn_info_list (unw_addr_space_t as,
2890 unw_word_t *dilap, void *arg)
2892 struct obj_section *text_sec;
2893 struct objfile *objfile;
2894 unw_word_t ip, addr;
2898 if (!libunwind_is_initialized ())
2899 return -UNW_ENOINFO;
2901 for (objfile = object_files; objfile; objfile = objfile->next)
2905 text_sec = objfile->sections + SECT_OFF_TEXT (objfile);
2906 ip = obj_section_addr (text_sec);
2907 ret = ia64_find_unwind_table (objfile, ip, &di, &buf);
2910 addr = libunwind_find_dyn_list (as, &di, arg);
2911 /* We no longer need the dyn info storage so free it. */
2916 if (gdbarch_debug >= 1)
2917 fprintf_unfiltered (gdb_stdlog,
2918 "dynamic unwind table in objfile %s "
2920 bfd_get_filename (objfile->obfd),
2921 hex_string (addr), hex_string (di.gp));
2927 return -UNW_ENOINFO;
2931 /* Frame interface functions for libunwind. */
2934 ia64_libunwind_frame_this_id (struct frame_info *this_frame, void **this_cache,
2935 struct frame_id *this_id)
2937 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2938 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2939 struct frame_id id = outer_frame_id;
2943 libunwind_frame_this_id (this_frame, this_cache, &id);
2944 if (frame_id_eq (id, outer_frame_id))
2946 (*this_id) = outer_frame_id;
2950 /* We must add the bsp as the special address for frame comparison
2952 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2953 bsp = extract_unsigned_integer (buf, 8, byte_order);
2955 (*this_id) = frame_id_build_special (id.stack_addr, id.code_addr, bsp);
2957 if (gdbarch_debug >= 1)
2958 fprintf_unfiltered (gdb_stdlog,
2959 "libunwind frame id: code %s, stack %s, "
2960 "special %s, this_frame %s\n",
2961 paddress (gdbarch, id.code_addr),
2962 paddress (gdbarch, id.stack_addr),
2963 paddress (gdbarch, bsp),
2964 host_address_to_string (this_frame));
2967 static struct value *
2968 ia64_libunwind_frame_prev_register (struct frame_info *this_frame,
2969 void **this_cache, int regnum)
2972 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2973 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2976 if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
2977 reg = IA64_PR_REGNUM;
2978 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
2979 reg = IA64_UNAT_REGNUM;
2981 /* Let libunwind do most of the work. */
2982 val = libunwind_frame_prev_register (this_frame, this_cache, reg);
2984 if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
2988 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
2992 unsigned char buf[MAX_REGISTER_SIZE];
2994 /* Fetch predicate register rename base from current frame
2995 marker for this frame. */
2996 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2997 cfm = extract_unsigned_integer (buf, 8, byte_order);
2998 rrb_pr = (cfm >> 32) & 0x3f;
3000 /* Adjust the register number to account for register rotation. */
3001 regnum = VP16_REGNUM + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
3003 prN_val = extract_bit_field (value_contents_all (val),
3004 regnum - VP0_REGNUM, 1);
3005 return frame_unwind_got_constant (this_frame, regnum, prN_val);
3008 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
3012 unatN_val = extract_bit_field (value_contents_all (val),
3013 regnum - IA64_NAT0_REGNUM, 1);
3014 return frame_unwind_got_constant (this_frame, regnum, unatN_val);
3017 else if (regnum == IA64_BSP_REGNUM)
3019 struct value *cfm_val;
3020 CORE_ADDR prev_bsp, prev_cfm;
3022 /* We want to calculate the previous bsp as the end of the previous
3023 register stack frame. This corresponds to what the hardware bsp
3024 register will be if we pop the frame back which is why we might
3025 have been called. We know that libunwind will pass us back the
3026 beginning of the current frame so we should just add sof to it. */
3027 prev_bsp = extract_unsigned_integer (value_contents_all (val),
3029 cfm_val = libunwind_frame_prev_register (this_frame, this_cache,
3031 prev_cfm = extract_unsigned_integer (value_contents_all (cfm_val),
3033 prev_bsp = rse_address_add (prev_bsp, (prev_cfm & 0x7f));
3035 return frame_unwind_got_constant (this_frame, regnum, prev_bsp);
3042 ia64_libunwind_frame_sniffer (const struct frame_unwind *self,
3043 struct frame_info *this_frame,
3046 if (libunwind_is_initialized ()
3047 && libunwind_frame_sniffer (self, this_frame, this_cache))
3053 static const struct frame_unwind ia64_libunwind_frame_unwind =
3056 default_frame_unwind_stop_reason,
3057 ia64_libunwind_frame_this_id,
3058 ia64_libunwind_frame_prev_register,
3060 ia64_libunwind_frame_sniffer,
3061 libunwind_frame_dealloc_cache
3065 ia64_libunwind_sigtramp_frame_this_id (struct frame_info *this_frame,
3067 struct frame_id *this_id)
3069 struct gdbarch *gdbarch = get_frame_arch (this_frame);
3070 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3073 struct frame_id id = outer_frame_id;
3076 libunwind_frame_this_id (this_frame, this_cache, &id);
3077 if (frame_id_eq (id, outer_frame_id))
3079 (*this_id) = outer_frame_id;
3083 /* We must add the bsp as the special address for frame comparison
3085 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
3086 bsp = extract_unsigned_integer (buf, 8, byte_order);
3088 /* For a sigtramp frame, we don't make the check for previous ip being 0. */
3089 (*this_id) = frame_id_build_special (id.stack_addr, id.code_addr, bsp);
3091 if (gdbarch_debug >= 1)
3092 fprintf_unfiltered (gdb_stdlog,
3093 "libunwind sigtramp frame id: code %s, "
3094 "stack %s, special %s, this_frame %s\n",
3095 paddress (gdbarch, id.code_addr),
3096 paddress (gdbarch, id.stack_addr),
3097 paddress (gdbarch, bsp),
3098 host_address_to_string (this_frame));
3101 static struct value *
3102 ia64_libunwind_sigtramp_frame_prev_register (struct frame_info *this_frame,
3103 void **this_cache, int regnum)
3105 struct gdbarch *gdbarch = get_frame_arch (this_frame);
3106 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3107 struct value *prev_ip_val;
3110 /* If the previous frame pc value is 0, then we want to use the SIGCONTEXT
3111 method of getting previous registers. */
3112 prev_ip_val = libunwind_frame_prev_register (this_frame, this_cache,
3114 prev_ip = extract_unsigned_integer (value_contents_all (prev_ip_val),
3119 void *tmp_cache = NULL;
3120 return ia64_sigtramp_frame_prev_register (this_frame, &tmp_cache,
3124 return ia64_libunwind_frame_prev_register (this_frame, this_cache, regnum);
3128 ia64_libunwind_sigtramp_frame_sniffer (const struct frame_unwind *self,
3129 struct frame_info *this_frame,
3132 if (libunwind_is_initialized ())
3134 if (libunwind_sigtramp_frame_sniffer (self, this_frame, this_cache))
3139 return ia64_sigtramp_frame_sniffer (self, this_frame, this_cache);
3142 static const struct frame_unwind ia64_libunwind_sigtramp_frame_unwind =
3145 default_frame_unwind_stop_reason,
3146 ia64_libunwind_sigtramp_frame_this_id,
3147 ia64_libunwind_sigtramp_frame_prev_register,
3149 ia64_libunwind_sigtramp_frame_sniffer
3152 /* Set of libunwind callback acccessor functions. */
3153 static unw_accessors_t ia64_unw_accessors =
3155 ia64_find_proc_info_x,
3156 ia64_put_unwind_info,
3157 ia64_get_dyn_info_list,
3165 /* Set of special libunwind callback acccessor functions specific for accessing
3166 the rse registers. At the top of the stack, we want libunwind to figure out
3167 how to read r32 - r127. Though usually they are found sequentially in
3168 memory starting from $bof, this is not always true. */
3169 static unw_accessors_t ia64_unw_rse_accessors =
3171 ia64_find_proc_info_x,
3172 ia64_put_unwind_info,
3173 ia64_get_dyn_info_list,
3175 ia64_access_rse_reg,
3176 ia64_access_rse_fpreg,
3181 /* Set of ia64 gdb libunwind-frame callbacks and data for generic
3182 libunwind-frame code to use. */
3183 static struct libunwind_descr ia64_libunwind_descr =
3188 &ia64_unw_accessors,
3189 &ia64_unw_rse_accessors,
3192 #endif /* HAVE_LIBUNWIND_IA64_H */
3195 ia64_use_struct_convention (struct type *type)
3197 struct type *float_elt_type;
3199 /* Don't use the struct convention for anything but structure,
3200 union, or array types. */
3201 if (!(TYPE_CODE (type) == TYPE_CODE_STRUCT
3202 || TYPE_CODE (type) == TYPE_CODE_UNION
3203 || TYPE_CODE (type) == TYPE_CODE_ARRAY))
3206 /* HFAs are structures (or arrays) consisting entirely of floating
3207 point values of the same length. Up to 8 of these are returned
3208 in registers. Don't use the struct convention when this is the
3210 float_elt_type = is_float_or_hfa_type (type);
3211 if (float_elt_type != NULL
3212 && TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type) <= 8)
3215 /* Other structs of length 32 or less are returned in r8-r11.
3216 Don't use the struct convention for those either. */
3217 return TYPE_LENGTH (type) > 32;
3220 /* Return non-zero if TYPE is a structure or union type. */
3223 ia64_struct_type_p (const struct type *type)
3225 return (TYPE_CODE (type) == TYPE_CODE_STRUCT
3226 || TYPE_CODE (type) == TYPE_CODE_UNION);
3230 ia64_extract_return_value (struct type *type, struct regcache *regcache,
3233 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3234 struct type *float_elt_type;
3236 float_elt_type = is_float_or_hfa_type (type);
3237 if (float_elt_type != NULL)
3239 char from[MAX_REGISTER_SIZE];
3241 int regnum = IA64_FR8_REGNUM;
3242 int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type);
3246 regcache_cooked_read (regcache, regnum, from);
3247 convert_typed_floating (from, ia64_ext_type (gdbarch),
3248 (char *)valbuf + offset, float_elt_type);
3249 offset += TYPE_LENGTH (float_elt_type);
3253 else if (!ia64_struct_type_p (type) && TYPE_LENGTH (type) < 8)
3255 /* This is an integral value, and its size is less than 8 bytes.
3256 These values are LSB-aligned, so extract the relevant bytes,
3257 and copy them into VALBUF. */
3258 /* brobecker/2005-12-30: Actually, all integral values are LSB aligned,
3259 so I suppose we should also add handling here for integral values
3260 whose size is greater than 8. But I wasn't able to create such
3261 a type, neither in C nor in Ada, so not worrying about these yet. */
3262 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3265 regcache_cooked_read_unsigned (regcache, IA64_GR8_REGNUM, &val);
3266 store_unsigned_integer (valbuf, TYPE_LENGTH (type), byte_order, val);
3272 int regnum = IA64_GR8_REGNUM;
3273 int reglen = TYPE_LENGTH (register_type (gdbarch, IA64_GR8_REGNUM));
3274 int n = TYPE_LENGTH (type) / reglen;
3275 int m = TYPE_LENGTH (type) % reglen;
3280 regcache_cooked_read_unsigned (regcache, regnum, &val);
3281 memcpy ((char *)valbuf + offset, &val, reglen);
3288 regcache_cooked_read_unsigned (regcache, regnum, &val);
3289 memcpy ((char *)valbuf + offset, &val, m);
3295 ia64_store_return_value (struct type *type, struct regcache *regcache,
3296 const gdb_byte *valbuf)
3298 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3299 struct type *float_elt_type;
3301 float_elt_type = is_float_or_hfa_type (type);
3302 if (float_elt_type != NULL)
3304 char to[MAX_REGISTER_SIZE];
3306 int regnum = IA64_FR8_REGNUM;
3307 int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type);
3311 convert_typed_floating ((char *)valbuf + offset, float_elt_type,
3312 to, ia64_ext_type (gdbarch));
3313 regcache_cooked_write (regcache, regnum, to);
3314 offset += TYPE_LENGTH (float_elt_type);
3322 int regnum = IA64_GR8_REGNUM;
3323 int reglen = TYPE_LENGTH (register_type (gdbarch, IA64_GR8_REGNUM));
3324 int n = TYPE_LENGTH (type) / reglen;
3325 int m = TYPE_LENGTH (type) % reglen;
3330 memcpy (&val, (char *)valbuf + offset, reglen);
3331 regcache_cooked_write_unsigned (regcache, regnum, val);
3338 memcpy (&val, (char *)valbuf + offset, m);
3339 regcache_cooked_write_unsigned (regcache, regnum, val);
3344 static enum return_value_convention
3345 ia64_return_value (struct gdbarch *gdbarch, struct type *func_type,
3346 struct type *valtype, struct regcache *regcache,
3347 gdb_byte *readbuf, const gdb_byte *writebuf)
3349 int struct_return = ia64_use_struct_convention (valtype);
3351 if (writebuf != NULL)
3353 gdb_assert (!struct_return);
3354 ia64_store_return_value (valtype, regcache, writebuf);
3357 if (readbuf != NULL)
3359 gdb_assert (!struct_return);
3360 ia64_extract_return_value (valtype, regcache, readbuf);
3364 return RETURN_VALUE_STRUCT_CONVENTION;
3366 return RETURN_VALUE_REGISTER_CONVENTION;
3370 is_float_or_hfa_type_recurse (struct type *t, struct type **etp)
3372 switch (TYPE_CODE (t))
3376 return TYPE_LENGTH (*etp) == TYPE_LENGTH (t);
3383 case TYPE_CODE_ARRAY:
3385 is_float_or_hfa_type_recurse (check_typedef (TYPE_TARGET_TYPE (t)),
3388 case TYPE_CODE_STRUCT:
3392 for (i = 0; i < TYPE_NFIELDS (t); i++)
3393 if (!is_float_or_hfa_type_recurse
3394 (check_typedef (TYPE_FIELD_TYPE (t, i)), etp))
3405 /* Determine if the given type is one of the floating point types or
3406 and HFA (which is a struct, array, or combination thereof whose
3407 bottom-most elements are all of the same floating point type). */
3409 static struct type *
3410 is_float_or_hfa_type (struct type *t)
3412 struct type *et = 0;
3414 return is_float_or_hfa_type_recurse (t, &et) ? et : 0;
3418 /* Return 1 if the alignment of T is such that the next even slot
3419 should be used. Return 0, if the next available slot should
3420 be used. (See section 8.5.1 of the IA-64 Software Conventions
3421 and Runtime manual). */
3424 slot_alignment_is_next_even (struct type *t)
3426 switch (TYPE_CODE (t))
3430 if (TYPE_LENGTH (t) > 8)
3434 case TYPE_CODE_ARRAY:
3436 slot_alignment_is_next_even (check_typedef (TYPE_TARGET_TYPE (t)));
3437 case TYPE_CODE_STRUCT:
3441 for (i = 0; i < TYPE_NFIELDS (t); i++)
3442 if (slot_alignment_is_next_even
3443 (check_typedef (TYPE_FIELD_TYPE (t, i))))
3452 /* Attempt to find (and return) the global pointer for the given
3455 This is a rather nasty bit of code searchs for the .dynamic section
3456 in the objfile corresponding to the pc of the function we're trying
3457 to call. Once it finds the addresses at which the .dynamic section
3458 lives in the child process, it scans the Elf64_Dyn entries for a
3459 DT_PLTGOT tag. If it finds one of these, the corresponding
3460 d_un.d_ptr value is the global pointer. */
3463 ia64_find_global_pointer_from_dynamic_section (struct gdbarch *gdbarch,
3466 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3467 struct obj_section *faddr_sect;
3469 faddr_sect = find_pc_section (faddr);
3470 if (faddr_sect != NULL)
3472 struct obj_section *osect;
3474 ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
3476 if (strcmp (osect->the_bfd_section->name, ".dynamic") == 0)
3480 if (osect < faddr_sect->objfile->sections_end)
3482 CORE_ADDR addr, endaddr;
3484 addr = obj_section_addr (osect);
3485 endaddr = obj_section_endaddr (osect);
3487 while (addr < endaddr)
3493 status = target_read_memory (addr, buf, sizeof (buf));
3496 tag = extract_signed_integer (buf, sizeof (buf), byte_order);
3498 if (tag == DT_PLTGOT)
3500 CORE_ADDR global_pointer;
3502 status = target_read_memory (addr + 8, buf, sizeof (buf));
3505 global_pointer = extract_unsigned_integer (buf, sizeof (buf),
3509 return global_pointer;
3522 /* Attempt to find (and return) the global pointer for the given
3523 function. We first try the find_global_pointer_from_solib routine
3524 from the gdbarch tdep vector, if provided. And if that does not
3525 work, then we try ia64_find_global_pointer_from_dynamic_section. */
3528 ia64_find_global_pointer (struct gdbarch *gdbarch, CORE_ADDR faddr)
3530 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
3533 if (tdep->find_global_pointer_from_solib)
3534 addr = tdep->find_global_pointer_from_solib (gdbarch, faddr);
3536 addr = ia64_find_global_pointer_from_dynamic_section (gdbarch, faddr);
3540 /* Given a function's address, attempt to find (and return) the
3541 corresponding (canonical) function descriptor. Return 0 if
3544 find_extant_func_descr (struct gdbarch *gdbarch, CORE_ADDR faddr)
3546 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3547 struct obj_section *faddr_sect;
3549 /* Return early if faddr is already a function descriptor. */
3550 faddr_sect = find_pc_section (faddr);
3551 if (faddr_sect && strcmp (faddr_sect->the_bfd_section->name, ".opd") == 0)
3554 if (faddr_sect != NULL)
3556 struct obj_section *osect;
3557 ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
3559 if (strcmp (osect->the_bfd_section->name, ".opd") == 0)
3563 if (osect < faddr_sect->objfile->sections_end)
3565 CORE_ADDR addr, endaddr;
3567 addr = obj_section_addr (osect);
3568 endaddr = obj_section_endaddr (osect);
3570 while (addr < endaddr)
3576 status = target_read_memory (addr, buf, sizeof (buf));
3579 faddr2 = extract_signed_integer (buf, sizeof (buf), byte_order);
3581 if (faddr == faddr2)
3591 /* Attempt to find a function descriptor corresponding to the
3592 given address. If none is found, construct one on the
3593 stack using the address at fdaptr. */
3596 find_func_descr (struct regcache *regcache, CORE_ADDR faddr, CORE_ADDR *fdaptr)
3598 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3599 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3602 fdesc = find_extant_func_descr (gdbarch, faddr);
3606 ULONGEST global_pointer;
3612 global_pointer = ia64_find_global_pointer (gdbarch, faddr);
3614 if (global_pointer == 0)
3615 regcache_cooked_read_unsigned (regcache,
3616 IA64_GR1_REGNUM, &global_pointer);
3618 store_unsigned_integer (buf, 8, byte_order, faddr);
3619 store_unsigned_integer (buf + 8, 8, byte_order, global_pointer);
3621 write_memory (fdesc, buf, 16);
3627 /* Use the following routine when printing out function pointers
3628 so the user can see the function address rather than just the
3629 function descriptor. */
3631 ia64_convert_from_func_ptr_addr (struct gdbarch *gdbarch, CORE_ADDR addr,
3632 struct target_ops *targ)
3634 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3635 struct obj_section *s;
3638 s = find_pc_section (addr);
3640 /* check if ADDR points to a function descriptor. */
3641 if (s && strcmp (s->the_bfd_section->name, ".opd") == 0)
3642 return read_memory_unsigned_integer (addr, 8, byte_order);
3644 /* Normally, functions live inside a section that is executable.
3645 So, if ADDR points to a non-executable section, then treat it
3646 as a function descriptor and return the target address iff
3647 the target address itself points to a section that is executable.
3648 Check first the memory of the whole length of 8 bytes is readable. */
3649 if (s && (s->the_bfd_section->flags & SEC_CODE) == 0
3650 && target_read_memory (addr, buf, 8) == 0)
3652 CORE_ADDR pc = extract_unsigned_integer (buf, 8, byte_order);
3653 struct obj_section *pc_section = find_pc_section (pc);
3655 if (pc_section && (pc_section->the_bfd_section->flags & SEC_CODE))
3659 /* There are also descriptors embedded in vtables. */
3662 struct minimal_symbol *minsym;
3664 minsym = lookup_minimal_symbol_by_pc (addr);
3666 if (minsym && is_vtable_name (SYMBOL_LINKAGE_NAME (minsym)))
3667 return read_memory_unsigned_integer (addr, 8, byte_order);
3674 ia64_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp)
3679 /* The default "allocate_new_rse_frame" ia64_infcall_ops routine for ia64. */
3682 ia64_allocate_new_rse_frame (struct regcache *regcache, ULONGEST bsp, int sof)
3684 ULONGEST cfm, pfs, new_bsp;
3686 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
3688 new_bsp = rse_address_add (bsp, sof);
3689 regcache_cooked_write_unsigned (regcache, IA64_BSP_REGNUM, new_bsp);
3691 regcache_cooked_read_unsigned (regcache, IA64_PFS_REGNUM, &pfs);
3692 pfs &= 0xc000000000000000LL;
3693 pfs |= (cfm & 0xffffffffffffLL);
3694 regcache_cooked_write_unsigned (regcache, IA64_PFS_REGNUM, pfs);
3696 cfm &= 0xc000000000000000LL;
3698 regcache_cooked_write_unsigned (regcache, IA64_CFM_REGNUM, cfm);
3701 /* The default "store_argument_in_slot" ia64_infcall_ops routine for
3705 ia64_store_argument_in_slot (struct regcache *regcache, CORE_ADDR bsp,
3706 int slotnum, gdb_byte *buf)
3708 write_memory (rse_address_add (bsp, slotnum), buf, 8);
3711 /* The default "set_function_addr" ia64_infcall_ops routine for ia64. */
3714 ia64_set_function_addr (struct regcache *regcache, CORE_ADDR func_addr)
3716 /* Nothing needed. */
3720 ia64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
3721 struct regcache *regcache, CORE_ADDR bp_addr,
3722 int nargs, struct value **args, CORE_ADDR sp,
3723 int struct_return, CORE_ADDR struct_addr)
3725 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
3726 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3731 int nslots, rseslots, memslots, slotnum, nfuncargs;
3734 CORE_ADDR funcdescaddr, pc, global_pointer;
3735 CORE_ADDR func_addr = find_function_addr (function, NULL);
3739 /* Count the number of slots needed for the arguments. */
3740 for (argno = 0; argno < nargs; argno++)
3743 type = check_typedef (value_type (arg));
3744 len = TYPE_LENGTH (type);
3746 if ((nslots & 1) && slot_alignment_is_next_even (type))
3749 if (TYPE_CODE (type) == TYPE_CODE_FUNC)
3752 nslots += (len + 7) / 8;
3755 /* Divvy up the slots between the RSE and the memory stack. */
3756 rseslots = (nslots > 8) ? 8 : nslots;
3757 memslots = nslots - rseslots;
3759 /* Allocate a new RSE frame. */
3760 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
3761 tdep->infcall_ops.allocate_new_rse_frame (regcache, bsp, rseslots);
3763 /* We will attempt to find function descriptors in the .opd segment,
3764 but if we can't we'll construct them ourselves. That being the
3765 case, we'll need to reserve space on the stack for them. */
3766 funcdescaddr = sp - nfuncargs * 16;
3767 funcdescaddr &= ~0xfLL;
3769 /* Adjust the stack pointer to it's new value. The calling conventions
3770 require us to have 16 bytes of scratch, plus whatever space is
3771 necessary for the memory slots and our function descriptors. */
3772 sp = sp - 16 - (memslots + nfuncargs) * 8;
3773 sp &= ~0xfLL; /* Maintain 16 byte alignment. */
3775 /* Place the arguments where they belong. The arguments will be
3776 either placed in the RSE backing store or on the memory stack.
3777 In addition, floating point arguments or HFAs are placed in
3778 floating point registers. */
3780 floatreg = IA64_FR8_REGNUM;
3781 for (argno = 0; argno < nargs; argno++)
3783 struct type *float_elt_type;
3786 type = check_typedef (value_type (arg));
3787 len = TYPE_LENGTH (type);
3789 /* Special handling for function parameters. */
3791 && TYPE_CODE (type) == TYPE_CODE_PTR
3792 && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC)
3795 ULONGEST faddr = extract_unsigned_integer (value_contents (arg),
3797 store_unsigned_integer (val_buf, 8, byte_order,
3798 find_func_descr (regcache, faddr,
3800 if (slotnum < rseslots)
3801 tdep->infcall_ops.store_argument_in_slot (regcache, bsp,
3804 write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8);
3811 /* Skip odd slot if necessary... */
3812 if ((slotnum & 1) && slot_alignment_is_next_even (type))
3820 memset (val_buf, 0, 8);
3821 if (!ia64_struct_type_p (type) && len < 8)
3823 /* Integral types are LSB-aligned, so we have to be careful
3824 to insert the argument on the correct side of the buffer.
3825 This is why we use store_unsigned_integer. */
3826 store_unsigned_integer
3827 (val_buf, 8, byte_order,
3828 extract_unsigned_integer (value_contents (arg), len,
3833 /* This is either an 8bit integral type, or an aggregate.
3834 For 8bit integral type, there is no problem, we just
3835 copy the value over.
3837 For aggregates, the only potentially tricky portion
3838 is to write the last one if it is less than 8 bytes.
3839 In this case, the data is Byte0-aligned. Happy news,
3840 this means that we don't need to differentiate the
3841 handling of 8byte blocks and less-than-8bytes blocks. */
3842 memcpy (val_buf, value_contents (arg) + argoffset,
3843 (len > 8) ? 8 : len);
3846 if (slotnum < rseslots)
3847 tdep->infcall_ops.store_argument_in_slot (regcache, bsp,
3850 write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8);
3857 /* Handle floating point types (including HFAs). */
3858 float_elt_type = is_float_or_hfa_type (type);
3859 if (float_elt_type != NULL)
3862 len = TYPE_LENGTH (type);
3863 while (len > 0 && floatreg < IA64_FR16_REGNUM)
3865 char to[MAX_REGISTER_SIZE];
3866 convert_typed_floating (value_contents (arg) + argoffset,
3868 ia64_ext_type (gdbarch));
3869 regcache_cooked_write (regcache, floatreg, (void *)to);
3871 argoffset += TYPE_LENGTH (float_elt_type);
3872 len -= TYPE_LENGTH (float_elt_type);
3877 /* Store the struct return value in r8 if necessary. */
3880 regcache_cooked_write_unsigned (regcache, IA64_GR8_REGNUM,
3881 (ULONGEST) struct_addr);
3884 global_pointer = ia64_find_global_pointer (gdbarch, func_addr);
3886 if (global_pointer != 0)
3887 regcache_cooked_write_unsigned (regcache, IA64_GR1_REGNUM, global_pointer);
3889 /* The following is not necessary on HP-UX, because we're using
3890 a dummy code sequence pushed on the stack to make the call, and
3891 this sequence doesn't need b0 to be set in order for our dummy
3892 breakpoint to be hit. Nonetheless, this doesn't interfere, and
3893 it's needed for other OSes, so we do this unconditionaly. */
3894 regcache_cooked_write_unsigned (regcache, IA64_BR0_REGNUM, bp_addr);
3896 regcache_cooked_write_unsigned (regcache, sp_regnum, sp);
3898 tdep->infcall_ops.set_function_addr (regcache, func_addr);
3903 static const struct ia64_infcall_ops ia64_infcall_ops =
3905 ia64_allocate_new_rse_frame,
3906 ia64_store_argument_in_slot,
3907 ia64_set_function_addr
3910 static struct frame_id
3911 ia64_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
3913 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3917 get_frame_register (this_frame, sp_regnum, buf);
3918 sp = extract_unsigned_integer (buf, 8, byte_order);
3920 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
3921 bsp = extract_unsigned_integer (buf, 8, byte_order);
3923 if (gdbarch_debug >= 1)
3924 fprintf_unfiltered (gdb_stdlog,
3925 "dummy frame id: code %s, stack %s, special %s\n",
3926 paddress (gdbarch, get_frame_pc (this_frame)),
3927 paddress (gdbarch, sp), paddress (gdbarch, bsp));
3929 return frame_id_build_special (sp, get_frame_pc (this_frame), bsp);
3933 ia64_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
3935 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3937 CORE_ADDR ip, psr, pc;
3939 frame_unwind_register (next_frame, IA64_IP_REGNUM, buf);
3940 ip = extract_unsigned_integer (buf, 8, byte_order);
3941 frame_unwind_register (next_frame, IA64_PSR_REGNUM, buf);
3942 psr = extract_unsigned_integer (buf, 8, byte_order);
3944 pc = (ip & ~0xf) | ((psr >> 41) & 3);
3949 ia64_print_insn (bfd_vma memaddr, struct disassemble_info *info)
3951 info->bytes_per_line = SLOT_MULTIPLIER;
3952 return print_insn_ia64 (memaddr, info);
3955 /* The default "size_of_register_frame" gdbarch_tdep routine for ia64. */
3958 ia64_size_of_register_frame (struct frame_info *this_frame, ULONGEST cfm)
3960 return (cfm & 0x7f);
3963 static struct gdbarch *
3964 ia64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
3966 struct gdbarch *gdbarch;
3967 struct gdbarch_tdep *tdep;
3969 /* If there is already a candidate, use it. */
3970 arches = gdbarch_list_lookup_by_info (arches, &info);
3972 return arches->gdbarch;
3974 tdep = xzalloc (sizeof (struct gdbarch_tdep));
3975 gdbarch = gdbarch_alloc (&info, tdep);
3977 tdep->size_of_register_frame = ia64_size_of_register_frame;
3979 /* According to the ia64 specs, instructions that store long double
3980 floats in memory use a long-double format different than that
3981 used in the floating registers. The memory format matches the
3982 x86 extended float format which is 80 bits. An OS may choose to
3983 use this format (e.g. GNU/Linux) or choose to use a different
3984 format for storing long doubles (e.g. HPUX). In the latter case,
3985 the setting of the format may be moved/overridden in an
3986 OS-specific tdep file. */
3987 set_gdbarch_long_double_format (gdbarch, floatformats_i387_ext);
3989 set_gdbarch_short_bit (gdbarch, 16);
3990 set_gdbarch_int_bit (gdbarch, 32);
3991 set_gdbarch_long_bit (gdbarch, 64);
3992 set_gdbarch_long_long_bit (gdbarch, 64);
3993 set_gdbarch_float_bit (gdbarch, 32);
3994 set_gdbarch_double_bit (gdbarch, 64);
3995 set_gdbarch_long_double_bit (gdbarch, 128);
3996 set_gdbarch_ptr_bit (gdbarch, 64);
3998 set_gdbarch_num_regs (gdbarch, NUM_IA64_RAW_REGS);
3999 set_gdbarch_num_pseudo_regs (gdbarch,
4000 LAST_PSEUDO_REGNUM - FIRST_PSEUDO_REGNUM);
4001 set_gdbarch_sp_regnum (gdbarch, sp_regnum);
4002 set_gdbarch_fp0_regnum (gdbarch, IA64_FR0_REGNUM);
4004 set_gdbarch_register_name (gdbarch, ia64_register_name);
4005 set_gdbarch_register_type (gdbarch, ia64_register_type);
4007 set_gdbarch_pseudo_register_read (gdbarch, ia64_pseudo_register_read);
4008 set_gdbarch_pseudo_register_write (gdbarch, ia64_pseudo_register_write);
4009 set_gdbarch_dwarf2_reg_to_regnum (gdbarch, ia64_dwarf_reg_to_regnum);
4010 set_gdbarch_register_reggroup_p (gdbarch, ia64_register_reggroup_p);
4011 set_gdbarch_convert_register_p (gdbarch, ia64_convert_register_p);
4012 set_gdbarch_register_to_value (gdbarch, ia64_register_to_value);
4013 set_gdbarch_value_to_register (gdbarch, ia64_value_to_register);
4015 set_gdbarch_skip_prologue (gdbarch, ia64_skip_prologue);
4017 set_gdbarch_return_value (gdbarch, ia64_return_value);
4019 set_gdbarch_memory_insert_breakpoint (gdbarch,
4020 ia64_memory_insert_breakpoint);
4021 set_gdbarch_memory_remove_breakpoint (gdbarch,
4022 ia64_memory_remove_breakpoint);
4023 set_gdbarch_breakpoint_from_pc (gdbarch, ia64_breakpoint_from_pc);
4024 set_gdbarch_read_pc (gdbarch, ia64_read_pc);
4025 set_gdbarch_write_pc (gdbarch, ia64_write_pc);
4027 /* Settings for calling functions in the inferior. */
4028 set_gdbarch_push_dummy_call (gdbarch, ia64_push_dummy_call);
4029 tdep->infcall_ops = ia64_infcall_ops;
4030 set_gdbarch_frame_align (gdbarch, ia64_frame_align);
4031 set_gdbarch_dummy_id (gdbarch, ia64_dummy_id);
4033 set_gdbarch_unwind_pc (gdbarch, ia64_unwind_pc);
4034 #ifdef HAVE_LIBUNWIND_IA64_H
4035 frame_unwind_append_unwinder (gdbarch,
4036 &ia64_libunwind_sigtramp_frame_unwind);
4037 frame_unwind_append_unwinder (gdbarch, &ia64_libunwind_frame_unwind);
4038 frame_unwind_append_unwinder (gdbarch, &ia64_sigtramp_frame_unwind);
4039 libunwind_frame_set_descr (gdbarch, &ia64_libunwind_descr);
4041 frame_unwind_append_unwinder (gdbarch, &ia64_sigtramp_frame_unwind);
4043 frame_unwind_append_unwinder (gdbarch, &ia64_frame_unwind);
4044 frame_base_set_default (gdbarch, &ia64_frame_base);
4046 /* Settings that should be unnecessary. */
4047 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
4049 set_gdbarch_print_insn (gdbarch, ia64_print_insn);
4050 set_gdbarch_convert_from_func_ptr_addr (gdbarch,
4051 ia64_convert_from_func_ptr_addr);
4053 /* The virtual table contains 16-byte descriptors, not pointers to
4055 set_gdbarch_vtable_function_descriptors (gdbarch, 1);
4057 /* Hook in ABI-specific overrides, if they have been registered. */
4058 gdbarch_init_osabi (info, gdbarch);
4063 extern initialize_file_ftype _initialize_ia64_tdep; /* -Wmissing-prototypes */
4066 _initialize_ia64_tdep (void)
4068 gdbarch_register (bfd_arch_ia64, ia64_gdbarch_init, NULL);