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 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 pseudo-registers because
136 they may not be accessible via the ptrace register get/set interfaces. */
137 enum pseudo_regs { FIRST_PSEUDO_REGNUM = NUM_IA64_RAW_REGS, VBOF_REGNUM = IA64_NAT127_REGNUM + 1, V32_REGNUM,
138 V127_REGNUM = V32_REGNUM + 95,
139 VP0_REGNUM, VP16_REGNUM = VP0_REGNUM + 16, VP63_REGNUM = VP0_REGNUM + 63, LAST_PSEUDO_REGNUM };
141 /* Array of register names; There should be ia64_num_regs strings in
144 static char *ia64_register_names[] =
145 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
146 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
147 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
148 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
149 "", "", "", "", "", "", "", "",
150 "", "", "", "", "", "", "", "",
151 "", "", "", "", "", "", "", "",
152 "", "", "", "", "", "", "", "",
153 "", "", "", "", "", "", "", "",
154 "", "", "", "", "", "", "", "",
155 "", "", "", "", "", "", "", "",
156 "", "", "", "", "", "", "", "",
157 "", "", "", "", "", "", "", "",
158 "", "", "", "", "", "", "", "",
159 "", "", "", "", "", "", "", "",
160 "", "", "", "", "", "", "", "",
162 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
163 "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
164 "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
165 "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
166 "f32", "f33", "f34", "f35", "f36", "f37", "f38", "f39",
167 "f40", "f41", "f42", "f43", "f44", "f45", "f46", "f47",
168 "f48", "f49", "f50", "f51", "f52", "f53", "f54", "f55",
169 "f56", "f57", "f58", "f59", "f60", "f61", "f62", "f63",
170 "f64", "f65", "f66", "f67", "f68", "f69", "f70", "f71",
171 "f72", "f73", "f74", "f75", "f76", "f77", "f78", "f79",
172 "f80", "f81", "f82", "f83", "f84", "f85", "f86", "f87",
173 "f88", "f89", "f90", "f91", "f92", "f93", "f94", "f95",
174 "f96", "f97", "f98", "f99", "f100", "f101", "f102", "f103",
175 "f104", "f105", "f106", "f107", "f108", "f109", "f110", "f111",
176 "f112", "f113", "f114", "f115", "f116", "f117", "f118", "f119",
177 "f120", "f121", "f122", "f123", "f124", "f125", "f126", "f127",
179 "", "", "", "", "", "", "", "",
180 "", "", "", "", "", "", "", "",
181 "", "", "", "", "", "", "", "",
182 "", "", "", "", "", "", "", "",
183 "", "", "", "", "", "", "", "",
184 "", "", "", "", "", "", "", "",
185 "", "", "", "", "", "", "", "",
186 "", "", "", "", "", "", "", "",
188 "b0", "b1", "b2", "b3", "b4", "b5", "b6", "b7",
192 "pr", "ip", "psr", "cfm",
194 "kr0", "kr1", "kr2", "kr3", "kr4", "kr5", "kr6", "kr7",
195 "", "", "", "", "", "", "", "",
196 "rsc", "bsp", "bspstore", "rnat",
198 "eflag", "csd", "ssd", "cflg", "fsr", "fir", "fdr", "",
199 "ccv", "", "", "", "unat", "", "", "",
200 "fpsr", "", "", "", "itc",
201 "", "", "", "", "", "", "", "", "", "",
202 "", "", "", "", "", "", "", "", "",
204 "", "", "", "", "", "", "", "", "", "",
205 "", "", "", "", "", "", "", "", "", "",
206 "", "", "", "", "", "", "", "", "", "",
207 "", "", "", "", "", "", "", "", "", "",
208 "", "", "", "", "", "", "", "", "", "",
209 "", "", "", "", "", "", "", "", "", "",
211 "nat0", "nat1", "nat2", "nat3", "nat4", "nat5", "nat6", "nat7",
212 "nat8", "nat9", "nat10", "nat11", "nat12", "nat13", "nat14", "nat15",
213 "nat16", "nat17", "nat18", "nat19", "nat20", "nat21", "nat22", "nat23",
214 "nat24", "nat25", "nat26", "nat27", "nat28", "nat29", "nat30", "nat31",
215 "nat32", "nat33", "nat34", "nat35", "nat36", "nat37", "nat38", "nat39",
216 "nat40", "nat41", "nat42", "nat43", "nat44", "nat45", "nat46", "nat47",
217 "nat48", "nat49", "nat50", "nat51", "nat52", "nat53", "nat54", "nat55",
218 "nat56", "nat57", "nat58", "nat59", "nat60", "nat61", "nat62", "nat63",
219 "nat64", "nat65", "nat66", "nat67", "nat68", "nat69", "nat70", "nat71",
220 "nat72", "nat73", "nat74", "nat75", "nat76", "nat77", "nat78", "nat79",
221 "nat80", "nat81", "nat82", "nat83", "nat84", "nat85", "nat86", "nat87",
222 "nat88", "nat89", "nat90", "nat91", "nat92", "nat93", "nat94", "nat95",
223 "nat96", "nat97", "nat98", "nat99", "nat100","nat101","nat102","nat103",
224 "nat104","nat105","nat106","nat107","nat108","nat109","nat110","nat111",
225 "nat112","nat113","nat114","nat115","nat116","nat117","nat118","nat119",
226 "nat120","nat121","nat122","nat123","nat124","nat125","nat126","nat127",
230 "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39",
231 "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47",
232 "r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55",
233 "r56", "r57", "r58", "r59", "r60", "r61", "r62", "r63",
234 "r64", "r65", "r66", "r67", "r68", "r69", "r70", "r71",
235 "r72", "r73", "r74", "r75", "r76", "r77", "r78", "r79",
236 "r80", "r81", "r82", "r83", "r84", "r85", "r86", "r87",
237 "r88", "r89", "r90", "r91", "r92", "r93", "r94", "r95",
238 "r96", "r97", "r98", "r99", "r100", "r101", "r102", "r103",
239 "r104", "r105", "r106", "r107", "r108", "r109", "r110", "r111",
240 "r112", "r113", "r114", "r115", "r116", "r117", "r118", "r119",
241 "r120", "r121", "r122", "r123", "r124", "r125", "r126", "r127",
243 "p0", "p1", "p2", "p3", "p4", "p5", "p6", "p7",
244 "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15",
245 "p16", "p17", "p18", "p19", "p20", "p21", "p22", "p23",
246 "p24", "p25", "p26", "p27", "p28", "p29", "p30", "p31",
247 "p32", "p33", "p34", "p35", "p36", "p37", "p38", "p39",
248 "p40", "p41", "p42", "p43", "p44", "p45", "p46", "p47",
249 "p48", "p49", "p50", "p51", "p52", "p53", "p54", "p55",
250 "p56", "p57", "p58", "p59", "p60", "p61", "p62", "p63",
253 struct ia64_frame_cache
255 CORE_ADDR base; /* frame pointer base for frame */
256 CORE_ADDR pc; /* function start pc for frame */
257 CORE_ADDR saved_sp; /* stack pointer for frame */
258 CORE_ADDR bsp; /* points at r32 for the current frame */
259 CORE_ADDR cfm; /* cfm value for current frame */
260 CORE_ADDR prev_cfm; /* cfm value for previous frame */
262 int sof; /* Size of frame (decoded from cfm value) */
263 int sol; /* Size of locals (decoded from cfm value) */
264 int sor; /* Number of rotating registers. (decoded from cfm value) */
265 CORE_ADDR after_prologue;
266 /* Address of first instruction after the last
267 prologue instruction; Note that there may
268 be instructions from the function's body
269 intermingled with the prologue. */
270 int mem_stack_frame_size;
271 /* Size of the memory stack frame (may be zero),
272 or -1 if it has not been determined yet. */
273 int fp_reg; /* Register number (if any) used a frame pointer
274 for this frame. 0 if no register is being used
275 as the frame pointer. */
277 /* Saved registers. */
278 CORE_ADDR saved_regs[NUM_IA64_RAW_REGS];
283 floatformat_valid (const struct floatformat *fmt, const void *from)
288 static const struct floatformat floatformat_ia64_ext =
290 floatformat_little, 82, 0, 1, 17, 65535, 0x1ffff, 18, 64,
291 floatformat_intbit_yes, "floatformat_ia64_ext", floatformat_valid, NULL
294 static const struct floatformat *floatformats_ia64_ext[2] =
296 &floatformat_ia64_ext,
297 &floatformat_ia64_ext
301 ia64_ext_type (struct gdbarch *gdbarch)
303 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
305 if (!tdep->ia64_ext_type)
307 = arch_float_type (gdbarch, 128, "builtin_type_ia64_ext",
308 floatformats_ia64_ext);
310 return tdep->ia64_ext_type;
314 ia64_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
315 struct reggroup *group)
320 if (group == all_reggroup)
322 vector_p = TYPE_VECTOR (register_type (gdbarch, regnum));
323 float_p = TYPE_CODE (register_type (gdbarch, regnum)) == TYPE_CODE_FLT;
324 raw_p = regnum < NUM_IA64_RAW_REGS;
325 if (group == float_reggroup)
327 if (group == vector_reggroup)
329 if (group == general_reggroup)
330 return (!vector_p && !float_p);
331 if (group == save_reggroup || group == restore_reggroup)
337 ia64_register_name (struct gdbarch *gdbarch, int reg)
339 return ia64_register_names[reg];
343 ia64_register_type (struct gdbarch *arch, int reg)
345 if (reg >= IA64_FR0_REGNUM && reg <= IA64_FR127_REGNUM)
346 return ia64_ext_type (arch);
348 return builtin_type (arch)->builtin_long;
352 ia64_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg)
354 if (reg >= IA64_GR32_REGNUM && reg <= IA64_GR127_REGNUM)
355 return V32_REGNUM + (reg - IA64_GR32_REGNUM);
360 /* Extract ``len'' bits from an instruction bundle starting at
364 extract_bit_field (const char *bundle, int from, int len)
366 long long result = 0LL;
368 int from_byte = from / 8;
369 int to_byte = to / 8;
370 unsigned char *b = (unsigned char *) bundle;
376 if (from_byte == to_byte)
377 c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8);
378 result = c >> (from % 8);
379 lshift = 8 - (from % 8);
381 for (i = from_byte+1; i < to_byte; i++)
383 result |= ((long long) b[i]) << lshift;
387 if (from_byte < to_byte && (to % 8 != 0))
390 c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8);
391 result |= ((long long) c) << lshift;
397 /* Replace the specified bits in an instruction bundle */
400 replace_bit_field (char *bundle, long long val, int from, int len)
403 int from_byte = from / 8;
404 int to_byte = to / 8;
405 unsigned char *b = (unsigned char *) bundle;
408 if (from_byte == to_byte)
410 unsigned char left, right;
412 left = (c >> (to % 8)) << (to % 8);
413 right = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8);
414 c = (unsigned char) (val & 0xff);
415 c = (unsigned char) (c << (from % 8 + 8 - to % 8)) >> (8 - to % 8);
423 c = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8);
424 c = c | (val << (from % 8));
426 val >>= 8 - from % 8;
428 for (i = from_byte+1; i < to_byte; i++)
437 unsigned char cv = (unsigned char) val;
439 c = c >> (to % 8) << (to % 8);
440 c |= ((unsigned char) (cv << (8 - to % 8))) >> (8 - to % 8);
446 /* Return the contents of slot N (for N = 0, 1, or 2) in
447 and instruction bundle */
450 slotN_contents (char *bundle, int slotnum)
452 return extract_bit_field (bundle, 5+41*slotnum, 41);
455 /* Store an instruction in an instruction bundle */
458 replace_slotN_contents (char *bundle, long long instr, int slotnum)
460 replace_bit_field (bundle, instr, 5+41*slotnum, 41);
463 static const enum instruction_type template_encoding_table[32][3] =
465 { M, I, I }, /* 00 */
466 { M, I, I }, /* 01 */
467 { M, I, I }, /* 02 */
468 { M, I, I }, /* 03 */
469 { M, L, X }, /* 04 */
470 { M, L, X }, /* 05 */
471 { undefined, undefined, undefined }, /* 06 */
472 { undefined, undefined, undefined }, /* 07 */
473 { M, M, I }, /* 08 */
474 { M, M, I }, /* 09 */
475 { M, M, I }, /* 0A */
476 { M, M, I }, /* 0B */
477 { M, F, I }, /* 0C */
478 { M, F, I }, /* 0D */
479 { M, M, F }, /* 0E */
480 { M, M, F }, /* 0F */
481 { M, I, B }, /* 10 */
482 { M, I, B }, /* 11 */
483 { M, B, B }, /* 12 */
484 { M, B, B }, /* 13 */
485 { undefined, undefined, undefined }, /* 14 */
486 { undefined, undefined, undefined }, /* 15 */
487 { B, B, B }, /* 16 */
488 { B, B, B }, /* 17 */
489 { M, M, B }, /* 18 */
490 { M, M, B }, /* 19 */
491 { undefined, undefined, undefined }, /* 1A */
492 { undefined, undefined, undefined }, /* 1B */
493 { M, F, B }, /* 1C */
494 { M, F, B }, /* 1D */
495 { undefined, undefined, undefined }, /* 1E */
496 { undefined, undefined, undefined }, /* 1F */
499 /* Fetch and (partially) decode an instruction at ADDR and return the
500 address of the next instruction to fetch. */
503 fetch_instruction (CORE_ADDR addr, instruction_type *it, long long *instr)
505 char bundle[BUNDLE_LEN];
506 int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER;
510 /* Warn about slot numbers greater than 2. We used to generate
511 an error here on the assumption that the user entered an invalid
512 address. But, sometimes GDB itself requests an invalid address.
513 This can (easily) happen when execution stops in a function for
514 which there are no symbols. The prologue scanner will attempt to
515 find the beginning of the function - if the nearest symbol
516 happens to not be aligned on a bundle boundary (16 bytes), the
517 resulting starting address will cause GDB to think that the slot
520 So we warn about it and set the slot number to zero. It is
521 not necessarily a fatal condition, particularly if debugging
522 at the assembly language level. */
525 warning (_("Can't fetch instructions for slot numbers greater than 2.\n"
526 "Using slot 0 instead"));
532 val = target_read_memory (addr, bundle, BUNDLE_LEN);
537 *instr = slotN_contents (bundle, slotnum);
538 template = extract_bit_field (bundle, 0, 5);
539 *it = template_encoding_table[(int)template][slotnum];
541 if (slotnum == 2 || (slotnum == 1 && *it == L))
544 addr += (slotnum + 1) * SLOT_MULTIPLIER;
549 /* There are 5 different break instructions (break.i, break.b,
550 break.m, break.f, and break.x), but they all have the same
551 encoding. (The five bit template in the low five bits of the
552 instruction bundle distinguishes one from another.)
554 The runtime architecture manual specifies that break instructions
555 used for debugging purposes must have the upper two bits of the 21
556 bit immediate set to a 0 and a 1 respectively. A breakpoint
557 instruction encodes the most significant bit of its 21 bit
558 immediate at bit 36 of the 41 bit instruction. The penultimate msb
559 is at bit 25 which leads to the pattern below.
561 Originally, I had this set up to do, e.g, a "break.i 0x80000" But
562 it turns out that 0x80000 was used as the syscall break in the early
563 simulators. So I changed the pattern slightly to do "break.i 0x080001"
564 instead. But that didn't work either (I later found out that this
565 pattern was used by the simulator that I was using.) So I ended up
566 using the pattern seen below.
568 SHADOW_CONTENTS has byte-based addressing (PLACED_ADDRESS and SHADOW_LEN)
569 while we need bit-based addressing as the instructions length is 41 bits and
570 we must not modify/corrupt the adjacent slots in the same bundle.
571 Fortunately we may store larger memory incl. the adjacent bits with the
572 original memory content (not the possibly already stored breakpoints there).
573 We need to be careful in ia64_memory_remove_breakpoint to always restore
574 only the specific bits of this instruction ignoring any adjacent stored
577 We use the original addressing with the low nibble in the range <0..2> which
578 gets incorrectly interpreted by generic non-ia64 breakpoint_restore_shadows
579 as the direct byte offset of SHADOW_CONTENTS. We store whole BUNDLE_LEN
580 bytes just without these two possibly skipped bytes to not to exceed to the
583 If we would like to store the whole bundle to SHADOW_CONTENTS we would have
584 to store already the base address (`address & ~0x0f') into PLACED_ADDRESS.
585 In such case there is no other place where to store
586 SLOTNUM (`adress & 0x0f', value in the range <0..2>). We need to know
587 SLOTNUM in ia64_memory_remove_breakpoint.
589 ia64 16-byte bundle layout:
590 | 5 bits | slot 0 with 41 bits | slot 1 with 41 bits | slot 2 with 41 bits |
592 The current addressing used by the code below:
593 original PC placed_address placed_size required covered
594 == bp_tgt->shadow_len reqd \subset covered
595 0xABCDE0 0xABCDE0 0xE <0x0...0x5> <0x0..0xD>
596 0xABCDE1 0xABCDE1 0xE <0x5...0xA> <0x1..0xE>
597 0xABCDE2 0xABCDE2 0xE <0xA...0xF> <0x2..0xF>
599 `objdump -d' and some other tools show a bit unjustified offsets:
600 original PC byte where starts the instruction objdump offset
601 0xABCDE0 0xABCDE0 0xABCDE0
602 0xABCDE1 0xABCDE5 0xABCDE6
603 0xABCDE2 0xABCDEA 0xABCDEC
606 #define IA64_BREAKPOINT 0x00003333300LL
609 ia64_memory_insert_breakpoint (struct gdbarch *gdbarch,
610 struct bp_target_info *bp_tgt)
612 CORE_ADDR addr = bp_tgt->placed_address;
613 gdb_byte bundle[BUNDLE_LEN];
614 int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER;
615 long long instr_breakpoint;
618 struct cleanup *cleanup;
621 error (_("Can't insert breakpoint for slot numbers greater than 2."));
625 /* Enable the automatic memory restoration from breakpoints while
626 we read our instruction bundle for the purpose of SHADOW_CONTENTS.
627 Otherwise, we could possibly store into the shadow parts of the adjacent
628 placed breakpoints. It is due to our SHADOW_CONTENTS overlapping the real
629 breakpoint instruction bits region. */
630 cleanup = make_show_memory_breakpoints_cleanup (0);
631 val = target_read_memory (addr, bundle, BUNDLE_LEN);
634 do_cleanups (cleanup);
638 /* Slot number 2 may skip at most 2 bytes at the beginning. */
639 bp_tgt->shadow_len = BUNDLE_LEN - 2;
641 /* Store the whole bundle, except for the initial skipped bytes by the slot
642 number interpreted as bytes offset in PLACED_ADDRESS. */
643 memcpy (bp_tgt->shadow_contents, bundle + slotnum, bp_tgt->shadow_len);
645 /* Re-read the same bundle as above except that, this time, read it in order
646 to compute the new bundle inside which we will be inserting the
647 breakpoint. Therefore, disable the automatic memory restoration from
648 breakpoints while we read our instruction bundle. Otherwise, the general
649 restoration mechanism kicks in and we would possibly remove parts of the
650 adjacent placed breakpoints. It is due to our SHADOW_CONTENTS overlapping
651 the real breakpoint instruction bits region. */
652 make_show_memory_breakpoints_cleanup (1);
653 val = target_read_memory (addr, bundle, BUNDLE_LEN);
656 do_cleanups (cleanup);
660 /* Check for L type instruction in slot 1, if present then bump up the slot
661 number to the slot 2. */
662 template = extract_bit_field (bundle, 0, 5);
663 if (slotnum == 1 && template_encoding_table[template][slotnum] == L)
666 /* Breakpoints already present in the code will get deteacted and not get
667 reinserted by bp_loc_is_permanent. Multiple breakpoints at the same
668 location cannot induce the internal error as they are optimized into
669 a single instance by update_global_location_list. */
670 instr_breakpoint = slotN_contents (bundle, slotnum);
671 if (instr_breakpoint == IA64_BREAKPOINT)
672 internal_error (__FILE__, __LINE__,
673 _("Address %s already contains a breakpoint."),
674 paddress (gdbarch, bp_tgt->placed_address));
675 replace_slotN_contents (bundle, IA64_BREAKPOINT, slotnum);
677 bp_tgt->placed_size = bp_tgt->shadow_len;
679 val = target_write_memory (addr + slotnum, bundle + slotnum,
682 do_cleanups (cleanup);
687 ia64_memory_remove_breakpoint (struct gdbarch *gdbarch,
688 struct bp_target_info *bp_tgt)
690 CORE_ADDR addr = bp_tgt->placed_address;
691 gdb_byte bundle_mem[BUNDLE_LEN], bundle_saved[BUNDLE_LEN];
692 int slotnum = (addr & 0x0f) / SLOT_MULTIPLIER;
693 long long instr_breakpoint, instr_saved;
696 struct cleanup *cleanup;
700 /* Disable the automatic memory restoration from breakpoints while
701 we read our instruction bundle. Otherwise, the general restoration
702 mechanism kicks in and we would possibly remove parts of the adjacent
703 placed breakpoints. It is due to our SHADOW_CONTENTS overlapping the real
704 breakpoint instruction bits region. */
705 cleanup = make_show_memory_breakpoints_cleanup (1);
706 val = target_read_memory (addr, bundle_mem, BUNDLE_LEN);
709 do_cleanups (cleanup);
713 /* Check for L type instruction in slot 1, if present then bump up the slot
714 number to the slot 2. */
715 template = extract_bit_field (bundle_mem, 0, 5);
716 if (slotnum == 1 && template_encoding_table[template][slotnum] == L)
719 gdb_assert (bp_tgt->placed_size == BUNDLE_LEN - 2);
720 gdb_assert (bp_tgt->placed_size == bp_tgt->shadow_len);
722 instr_breakpoint = slotN_contents (bundle_mem, slotnum);
723 if (instr_breakpoint != IA64_BREAKPOINT)
725 warning (_("Cannot remove breakpoint at address %s, "
726 "no break instruction at such address."),
727 paddress (gdbarch, bp_tgt->placed_address));
731 /* Extract the original saved instruction from SLOTNUM normalizing its
732 bit-shift for INSTR_SAVED. */
733 memcpy (bundle_saved, bundle_mem, BUNDLE_LEN);
734 memcpy (bundle_saved + slotnum, bp_tgt->shadow_contents, bp_tgt->shadow_len);
735 instr_saved = slotN_contents (bundle_saved, slotnum);
737 /* In BUNDLE_MEM be careful to modify only the bits belonging to SLOTNUM and
738 never any other possibly also stored in SHADOW_CONTENTS. */
739 replace_slotN_contents (bundle_mem, instr_saved, slotnum);
740 val = target_write_memory (addr, bundle_mem, BUNDLE_LEN);
742 do_cleanups (cleanup);
746 /* As gdbarch_breakpoint_from_pc ranges have byte granularity and ia64
747 instruction slots ranges are bit-granular (41 bits) we have to provide an
748 extended range as described for ia64_memory_insert_breakpoint. We also take
749 care of preserving the `break' instruction 21-bit (or 62-bit) parameter to
750 make a match for permanent breakpoints. */
752 static const gdb_byte *
753 ia64_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr, int *lenptr)
755 CORE_ADDR addr = *pcptr;
756 static gdb_byte bundle[BUNDLE_LEN];
757 int slotnum = (int) (*pcptr & 0x0f) / SLOT_MULTIPLIER;
758 long long instr_fetched;
761 struct cleanup *cleanup;
764 error (_("Can't insert breakpoint for slot numbers greater than 2."));
768 /* Enable the automatic memory restoration from breakpoints while
769 we read our instruction bundle to match bp_loc_is_permanent. */
770 cleanup = make_show_memory_breakpoints_cleanup (0);
771 val = target_read_memory (addr, bundle, BUNDLE_LEN);
772 do_cleanups (cleanup);
774 /* The memory might be unreachable. This can happen, for instance,
775 when the user inserts a breakpoint at an invalid address. */
779 /* Check for L type instruction in slot 1, if present then bump up the slot
780 number to the slot 2. */
781 template = extract_bit_field (bundle, 0, 5);
782 if (slotnum == 1 && template_encoding_table[template][slotnum] == L)
785 /* A break instruction has its all its opcode bits cleared except for
786 the parameter value. For L+X slot pair we are at the X slot (slot 2) so
787 we should not touch the L slot - the upper 41 bits of the parameter. */
788 instr_fetched = slotN_contents (bundle, slotnum);
789 instr_fetched &= 0x1003ffffc0LL;
790 replace_slotN_contents (bundle, instr_fetched, slotnum);
792 *lenptr = BUNDLE_LEN - 2;
794 /* SLOTNUM is possibly already locally modified - use caller's *PCPTR. */
795 return bundle + (*pcptr & 0x0f);
799 ia64_read_pc (struct regcache *regcache)
801 ULONGEST psr_value, pc_value;
804 regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr_value);
805 regcache_cooked_read_unsigned (regcache, IA64_IP_REGNUM, &pc_value);
806 slot_num = (psr_value >> 41) & 3;
808 return pc_value | (slot_num * SLOT_MULTIPLIER);
812 ia64_write_pc (struct regcache *regcache, CORE_ADDR new_pc)
814 int slot_num = (int) (new_pc & 0xf) / SLOT_MULTIPLIER;
817 regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr_value);
818 psr_value &= ~(3LL << 41);
819 psr_value |= (ULONGEST)(slot_num & 0x3) << 41;
823 regcache_cooked_write_unsigned (regcache, IA64_PSR_REGNUM, psr_value);
824 regcache_cooked_write_unsigned (regcache, IA64_IP_REGNUM, new_pc);
827 #define IS_NaT_COLLECTION_ADDR(addr) ((((addr) >> 3) & 0x3f) == 0x3f)
829 /* Returns the address of the slot that's NSLOTS slots away from
830 the address ADDR. NSLOTS may be positive or negative. */
832 rse_address_add(CORE_ADDR addr, int nslots)
835 int mandatory_nat_slots = nslots / 63;
836 int direction = nslots < 0 ? -1 : 1;
838 new_addr = addr + 8 * (nslots + mandatory_nat_slots);
840 if ((new_addr >> 9) != ((addr + 8 * 64 * mandatory_nat_slots) >> 9))
841 new_addr += 8 * direction;
843 if (IS_NaT_COLLECTION_ADDR(new_addr))
844 new_addr += 8 * direction;
850 ia64_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
851 int regnum, gdb_byte *buf)
853 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
855 if (regnum >= V32_REGNUM && regnum <= V127_REGNUM)
857 #ifdef HAVE_LIBUNWIND_IA64_H
858 /* First try and use the libunwind special reg accessor, otherwise fallback to
860 if (!libunwind_is_initialized ()
861 || libunwind_get_reg_special (gdbarch, regcache, regnum, buf) != 0)
864 /* The fallback position is to assume that r32-r127 are found sequentially
865 in memory starting at $bof. This isn't always true, but without libunwind,
866 this is the best we can do. */
870 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
871 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
873 /* The bsp points at the end of the register frame so we
874 subtract the size of frame from it to get start of register frame. */
875 bsp = rse_address_add (bsp, -(cfm & 0x7f));
877 if ((cfm & 0x7f) > regnum - V32_REGNUM)
879 ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
880 reg = read_memory_integer ((CORE_ADDR)reg_addr, 8, byte_order);
881 store_unsigned_integer (buf, register_size (gdbarch, regnum),
885 store_unsigned_integer (buf, register_size (gdbarch, regnum),
889 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
893 regcache_cooked_read_unsigned (regcache, IA64_UNAT_REGNUM, &unat);
894 unatN_val = (unat & (1LL << (regnum - IA64_NAT0_REGNUM))) != 0;
895 store_unsigned_integer (buf, register_size (gdbarch, regnum),
896 byte_order, unatN_val);
898 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
900 ULONGEST natN_val = 0;
903 CORE_ADDR gr_addr = 0;
904 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
905 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
907 /* The bsp points at the end of the register frame so we
908 subtract the size of frame from it to get start of register frame. */
909 bsp = rse_address_add (bsp, -(cfm & 0x7f));
911 if ((cfm & 0x7f) > regnum - V32_REGNUM)
912 gr_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
916 /* Compute address of nat collection bits. */
917 CORE_ADDR nat_addr = gr_addr | 0x1f8;
918 CORE_ADDR nat_collection;
920 /* If our nat collection address is bigger than bsp, we have to get
921 the nat collection from rnat. Otherwise, we fetch the nat
922 collection from the computed address. */
924 regcache_cooked_read_unsigned (regcache, IA64_RNAT_REGNUM, &nat_collection);
926 nat_collection = read_memory_integer (nat_addr, 8, byte_order);
927 nat_bit = (gr_addr >> 3) & 0x3f;
928 natN_val = (nat_collection >> nat_bit) & 1;
931 store_unsigned_integer (buf, register_size (gdbarch, regnum),
932 byte_order, natN_val);
934 else if (regnum == VBOF_REGNUM)
936 /* A virtual register frame start is provided for user convenience.
937 It can be calculated as the bsp - sof (sizeof frame). */
941 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
942 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
944 /* The bsp points at the end of the register frame so we
945 subtract the size of frame from it to get beginning of frame. */
946 vbsp = rse_address_add (bsp, -(cfm & 0x7f));
947 store_unsigned_integer (buf, register_size (gdbarch, regnum),
950 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
956 regcache_cooked_read_unsigned (regcache, IA64_PR_REGNUM, &pr);
957 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
959 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
961 /* Fetch predicate register rename base from current frame
962 marker for this frame. */
963 int rrb_pr = (cfm >> 32) & 0x3f;
965 /* Adjust the register number to account for register rotation. */
967 + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
969 prN_val = (pr & (1LL << (regnum - VP0_REGNUM))) != 0;
970 store_unsigned_integer (buf, register_size (gdbarch, regnum),
971 byte_order, prN_val);
974 memset (buf, 0, register_size (gdbarch, regnum));
978 ia64_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
979 int regnum, const gdb_byte *buf)
981 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
983 if (regnum >= V32_REGNUM && regnum <= V127_REGNUM)
988 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
989 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
991 bsp = rse_address_add (bsp, -(cfm & 0x7f));
993 if ((cfm & 0x7f) > regnum - V32_REGNUM)
995 ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
996 write_memory (reg_addr, (void *)buf, 8);
999 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
1001 ULONGEST unatN_val, unat, unatN_mask;
1002 regcache_cooked_read_unsigned (regcache, IA64_UNAT_REGNUM, &unat);
1003 unatN_val = extract_unsigned_integer (buf, register_size (gdbarch, regnum),
1005 unatN_mask = (1LL << (regnum - IA64_NAT0_REGNUM));
1007 unat &= ~unatN_mask;
1008 else if (unatN_val == 1)
1010 regcache_cooked_write_unsigned (regcache, IA64_UNAT_REGNUM, unat);
1012 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
1017 CORE_ADDR gr_addr = 0;
1018 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
1019 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1021 /* The bsp points at the end of the register frame so we
1022 subtract the size of frame from it to get start of register frame. */
1023 bsp = rse_address_add (bsp, -(cfm & 0x7f));
1025 if ((cfm & 0x7f) > regnum - V32_REGNUM)
1026 gr_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
1028 natN_val = extract_unsigned_integer (buf, register_size (gdbarch, regnum),
1031 if (gr_addr != 0 && (natN_val == 0 || natN_val == 1))
1033 /* Compute address of nat collection bits. */
1034 CORE_ADDR nat_addr = gr_addr | 0x1f8;
1035 CORE_ADDR nat_collection;
1036 int natN_bit = (gr_addr >> 3) & 0x3f;
1037 ULONGEST natN_mask = (1LL << natN_bit);
1038 /* If our nat collection address is bigger than bsp, we have to get
1039 the nat collection from rnat. Otherwise, we fetch the nat
1040 collection from the computed address. */
1041 if (nat_addr >= bsp)
1043 regcache_cooked_read_unsigned (regcache, IA64_RNAT_REGNUM, &nat_collection);
1045 nat_collection |= natN_mask;
1047 nat_collection &= ~natN_mask;
1048 regcache_cooked_write_unsigned (regcache, IA64_RNAT_REGNUM, nat_collection);
1053 nat_collection = read_memory_integer (nat_addr, 8, byte_order);
1055 nat_collection |= natN_mask;
1057 nat_collection &= ~natN_mask;
1058 store_unsigned_integer (nat_buf, register_size (gdbarch, regnum),
1059 byte_order, nat_collection);
1060 write_memory (nat_addr, nat_buf, 8);
1064 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
1071 regcache_cooked_read_unsigned (regcache, IA64_PR_REGNUM, &pr);
1072 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1074 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
1076 /* Fetch predicate register rename base from current frame
1077 marker for this frame. */
1078 int rrb_pr = (cfm >> 32) & 0x3f;
1080 /* Adjust the register number to account for register rotation. */
1081 regnum = VP16_REGNUM
1082 + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
1084 prN_val = extract_unsigned_integer (buf, register_size (gdbarch, regnum),
1086 prN_mask = (1LL << (regnum - VP0_REGNUM));
1089 else if (prN_val == 1)
1091 regcache_cooked_write_unsigned (regcache, IA64_PR_REGNUM, pr);
1095 /* The ia64 needs to convert between various ieee floating-point formats
1096 and the special ia64 floating point register format. */
1099 ia64_convert_register_p (struct gdbarch *gdbarch, int regno, struct type *type)
1101 return (regno >= IA64_FR0_REGNUM && regno <= IA64_FR127_REGNUM
1102 && type != ia64_ext_type (gdbarch));
1106 ia64_register_to_value (struct frame_info *frame, int regnum,
1107 struct type *valtype, gdb_byte *out)
1109 struct gdbarch *gdbarch = get_frame_arch (frame);
1110 char in[MAX_REGISTER_SIZE];
1111 frame_register_read (frame, regnum, in);
1112 convert_typed_floating (in, ia64_ext_type (gdbarch), out, valtype);
1116 ia64_value_to_register (struct frame_info *frame, int regnum,
1117 struct type *valtype, const gdb_byte *in)
1119 struct gdbarch *gdbarch = get_frame_arch (frame);
1120 char out[MAX_REGISTER_SIZE];
1121 convert_typed_floating (in, valtype, out, ia64_ext_type (gdbarch));
1122 put_frame_register (frame, regnum, out);
1126 /* Limit the number of skipped non-prologue instructions since examining
1127 of the prologue is expensive. */
1128 static int max_skip_non_prologue_insns = 40;
1130 /* Given PC representing the starting address of a function, and
1131 LIM_PC which is the (sloppy) limit to which to scan when looking
1132 for a prologue, attempt to further refine this limit by using
1133 the line data in the symbol table. If successful, a better guess
1134 on where the prologue ends is returned, otherwise the previous
1135 value of lim_pc is returned. TRUST_LIMIT is a pointer to a flag
1136 which will be set to indicate whether the returned limit may be
1137 used with no further scanning in the event that the function is
1140 /* FIXME: cagney/2004-02-14: This function and logic have largely been
1141 superseded by skip_prologue_using_sal. */
1144 refine_prologue_limit (CORE_ADDR pc, CORE_ADDR lim_pc, int *trust_limit)
1146 struct symtab_and_line prologue_sal;
1147 CORE_ADDR start_pc = pc;
1150 /* The prologue can not possibly go past the function end itself,
1151 so we can already adjust LIM_PC accordingly. */
1152 if (find_pc_partial_function (pc, NULL, NULL, &end_pc) && end_pc < lim_pc)
1155 /* Start off not trusting the limit. */
1158 prologue_sal = find_pc_line (pc, 0);
1159 if (prologue_sal.line != 0)
1162 CORE_ADDR addr = prologue_sal.end;
1164 /* Handle the case in which compiler's optimizer/scheduler
1165 has moved instructions into the prologue. We scan ahead
1166 in the function looking for address ranges whose corresponding
1167 line number is less than or equal to the first one that we
1168 found for the function. (It can be less than when the
1169 scheduler puts a body instruction before the first prologue
1171 for (i = 2 * max_skip_non_prologue_insns;
1172 i > 0 && (lim_pc == 0 || addr < lim_pc);
1175 struct symtab_and_line sal;
1177 sal = find_pc_line (addr, 0);
1180 if (sal.line <= prologue_sal.line
1181 && sal.symtab == prologue_sal.symtab)
1188 if (lim_pc == 0 || prologue_sal.end < lim_pc)
1190 lim_pc = prologue_sal.end;
1191 if (start_pc == get_pc_function_start (lim_pc))
1198 #define isScratch(_regnum_) ((_regnum_) == 2 || (_regnum_) == 3 \
1199 || (8 <= (_regnum_) && (_regnum_) <= 11) \
1200 || (14 <= (_regnum_) && (_regnum_) <= 31))
1201 #define imm9(_instr_) \
1202 ( ((((_instr_) & 0x01000000000LL) ? -1 : 0) << 8) \
1203 | (((_instr_) & 0x00008000000LL) >> 20) \
1204 | (((_instr_) & 0x00000001fc0LL) >> 6))
1206 /* Allocate and initialize a frame cache. */
1208 static struct ia64_frame_cache *
1209 ia64_alloc_frame_cache (void)
1211 struct ia64_frame_cache *cache;
1214 cache = FRAME_OBSTACK_ZALLOC (struct ia64_frame_cache);
1220 cache->prev_cfm = 0;
1226 cache->frameless = 1;
1228 for (i = 0; i < NUM_IA64_RAW_REGS; i++)
1229 cache->saved_regs[i] = 0;
1235 examine_prologue (CORE_ADDR pc, CORE_ADDR lim_pc,
1236 struct frame_info *this_frame,
1237 struct ia64_frame_cache *cache)
1240 CORE_ADDR last_prologue_pc = pc;
1241 instruction_type it;
1246 int unat_save_reg = 0;
1247 int pr_save_reg = 0;
1248 int mem_stack_frame_size = 0;
1250 CORE_ADDR spill_addr = 0;
1253 char reg_contents[256];
1259 CORE_ADDR bof, sor, sol, sof, cfm, rrb_gr;
1261 memset (instores, 0, sizeof instores);
1262 memset (infpstores, 0, sizeof infpstores);
1263 memset (reg_contents, 0, sizeof reg_contents);
1265 if (cache->after_prologue != 0
1266 && cache->after_prologue <= lim_pc)
1267 return cache->after_prologue;
1269 lim_pc = refine_prologue_limit (pc, lim_pc, &trust_limit);
1270 next_pc = fetch_instruction (pc, &it, &instr);
1272 /* We want to check if we have a recognizable function start before we
1273 look ahead for a prologue. */
1274 if (pc < lim_pc && next_pc
1275 && it == M && ((instr & 0x1ee0000003fLL) == 0x02c00000000LL))
1277 /* alloc - start of a regular function. */
1278 int sor = (int) ((instr & 0x00078000000LL) >> 27);
1279 int sol = (int) ((instr & 0x00007f00000LL) >> 20);
1280 int sof = (int) ((instr & 0x000000fe000LL) >> 13);
1281 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1283 /* Verify that the current cfm matches what we think is the
1284 function start. If we have somehow jumped within a function,
1285 we do not want to interpret the prologue and calculate the
1286 addresses of various registers such as the return address.
1287 We will instead treat the frame as frameless. */
1289 (sof == (cache->cfm & 0x7f) &&
1290 sol == ((cache->cfm >> 7) & 0x7f)))
1294 last_prologue_pc = next_pc;
1299 /* Look for a leaf routine. */
1300 if (pc < lim_pc && next_pc
1301 && (it == I || it == M)
1302 && ((instr & 0x1ee00000000LL) == 0x10800000000LL))
1304 /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */
1305 int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13)
1306 | ((instr & 0x001f8000000LL) >> 20)
1307 | ((instr & 0x000000fe000LL) >> 13));
1308 int rM = (int) ((instr & 0x00007f00000LL) >> 20);
1309 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1310 int qp = (int) (instr & 0x0000000003fLL);
1311 if (qp == 0 && rN == 2 && imm == 0 && rM == 12 && fp_reg == 0)
1313 /* mov r2, r12 - beginning of leaf routine */
1315 last_prologue_pc = next_pc;
1319 /* If we don't recognize a regular function or leaf routine, we are
1325 last_prologue_pc = lim_pc;
1329 /* Loop, looking for prologue instructions, keeping track of
1330 where preserved registers were spilled. */
1333 next_pc = fetch_instruction (pc, &it, &instr);
1337 if (it == B && ((instr & 0x1e1f800003fLL) != 0x04000000000LL))
1339 /* Exit loop upon hitting a non-nop branch instruction. */
1344 else if (((instr & 0x3fLL) != 0LL) &&
1345 (frameless || ret_reg != 0))
1347 /* Exit loop upon hitting a predicated instruction if
1348 we already have the return register or if we are frameless. */
1353 else if (it == I && ((instr & 0x1eff8000000LL) == 0x00188000000LL))
1356 int b2 = (int) ((instr & 0x0000000e000LL) >> 13);
1357 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1358 int qp = (int) (instr & 0x0000000003f);
1360 if (qp == 0 && b2 == 0 && rN >= 32 && ret_reg == 0)
1363 last_prologue_pc = next_pc;
1366 else if ((it == I || it == M)
1367 && ((instr & 0x1ee00000000LL) == 0x10800000000LL))
1369 /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */
1370 int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13)
1371 | ((instr & 0x001f8000000LL) >> 20)
1372 | ((instr & 0x000000fe000LL) >> 13));
1373 int rM = (int) ((instr & 0x00007f00000LL) >> 20);
1374 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1375 int qp = (int) (instr & 0x0000000003fLL);
1377 if (qp == 0 && rN >= 32 && imm == 0 && rM == 12 && fp_reg == 0)
1381 last_prologue_pc = next_pc;
1383 else if (qp == 0 && rN == 12 && rM == 12)
1385 /* adds r12, -mem_stack_frame_size, r12 */
1386 mem_stack_frame_size -= imm;
1387 last_prologue_pc = next_pc;
1389 else if (qp == 0 && rN == 2
1390 && ((rM == fp_reg && fp_reg != 0) || rM == 12))
1392 char buf[MAX_REGISTER_SIZE];
1393 CORE_ADDR saved_sp = 0;
1394 /* adds r2, spilloffset, rFramePointer
1396 adds r2, spilloffset, r12
1398 Get ready for stf.spill or st8.spill instructions.
1399 The address to start spilling at is loaded into r2.
1400 FIXME: Why r2? That's what gcc currently uses; it
1401 could well be different for other compilers. */
1403 /* Hmm... whether or not this will work will depend on
1404 where the pc is. If it's still early in the prologue
1405 this'll be wrong. FIXME */
1408 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1409 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1410 get_frame_register (this_frame, sp_regnum, buf);
1411 saved_sp = extract_unsigned_integer (buf, 8, byte_order);
1413 spill_addr = saved_sp
1414 + (rM == 12 ? 0 : mem_stack_frame_size)
1417 last_prologue_pc = next_pc;
1419 else if (qp == 0 && rM >= 32 && rM < 40 && !instores[rM-32] &&
1420 rN < 256 && imm == 0)
1422 /* mov rN, rM where rM is an input register */
1423 reg_contents[rN] = rM;
1424 last_prologue_pc = next_pc;
1426 else if (frameless && qp == 0 && rN == fp_reg && imm == 0 &&
1430 last_prologue_pc = next_pc;
1435 && ( ((instr & 0x1efc0000000LL) == 0x0eec0000000LL)
1436 || ((instr & 0x1ffc8000000LL) == 0x0cec0000000LL) ))
1438 /* stf.spill [rN] = fM, imm9
1440 stf.spill [rN] = fM */
1442 int imm = imm9(instr);
1443 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1444 int fM = (int) ((instr & 0x000000fe000LL) >> 13);
1445 int qp = (int) (instr & 0x0000000003fLL);
1446 if (qp == 0 && rN == spill_reg && spill_addr != 0
1447 && ((2 <= fM && fM <= 5) || (16 <= fM && fM <= 31)))
1449 cache->saved_regs[IA64_FR0_REGNUM + fM] = spill_addr;
1451 if ((instr & 0x1efc0000000LL) == 0x0eec0000000LL)
1454 spill_addr = 0; /* last one; must be done */
1455 last_prologue_pc = next_pc;
1458 else if ((it == M && ((instr & 0x1eff8000000LL) == 0x02110000000LL))
1459 || (it == I && ((instr & 0x1eff8000000LL) == 0x00050000000LL)) )
1465 int arM = (int) ((instr & 0x00007f00000LL) >> 20);
1466 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1467 int qp = (int) (instr & 0x0000000003fLL);
1468 if (qp == 0 && isScratch (rN) && arM == 36 /* ar.unat */)
1470 /* We have something like "mov.m r3 = ar.unat". Remember the
1471 r3 (or whatever) and watch for a store of this register... */
1473 last_prologue_pc = next_pc;
1476 else if (it == I && ((instr & 0x1eff8000000LL) == 0x00198000000LL))
1479 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1480 int qp = (int) (instr & 0x0000000003fLL);
1481 if (qp == 0 && isScratch (rN))
1484 last_prologue_pc = next_pc;
1488 && ( ((instr & 0x1ffc8000000LL) == 0x08cc0000000LL)
1489 || ((instr & 0x1efc0000000LL) == 0x0acc0000000LL)))
1493 st8 [rN] = rM, imm9 */
1494 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1495 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1496 int qp = (int) (instr & 0x0000000003fLL);
1497 int indirect = rM < 256 ? reg_contents[rM] : 0;
1498 if (qp == 0 && rN == spill_reg && spill_addr != 0
1499 && (rM == unat_save_reg || rM == pr_save_reg))
1501 /* We've found a spill of either the UNAT register or the PR
1502 register. (Well, not exactly; what we've actually found is
1503 a spill of the register that UNAT or PR was moved to).
1504 Record that fact and move on... */
1505 if (rM == unat_save_reg)
1507 /* Track UNAT register */
1508 cache->saved_regs[IA64_UNAT_REGNUM] = spill_addr;
1513 /* Track PR register */
1514 cache->saved_regs[IA64_PR_REGNUM] = spill_addr;
1517 if ((instr & 0x1efc0000000LL) == 0x0acc0000000LL)
1518 /* st8 [rN] = rM, imm9 */
1519 spill_addr += imm9(instr);
1521 spill_addr = 0; /* must be done spilling */
1522 last_prologue_pc = next_pc;
1524 else if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32])
1526 /* Allow up to one store of each input register. */
1527 instores[rM-32] = 1;
1528 last_prologue_pc = next_pc;
1530 else if (qp == 0 && 32 <= indirect && indirect < 40 &&
1531 !instores[indirect-32])
1533 /* Allow an indirect store of an input register. */
1534 instores[indirect-32] = 1;
1535 last_prologue_pc = next_pc;
1538 else if (it == M && ((instr & 0x1ff08000000LL) == 0x08c00000000LL))
1545 Note that the st8 case is handled in the clause above.
1547 Advance over stores of input registers. One store per input
1548 register is permitted. */
1549 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1550 int qp = (int) (instr & 0x0000000003fLL);
1551 int indirect = rM < 256 ? reg_contents[rM] : 0;
1552 if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32])
1554 instores[rM-32] = 1;
1555 last_prologue_pc = next_pc;
1557 else if (qp == 0 && 32 <= indirect && indirect < 40 &&
1558 !instores[indirect-32])
1560 /* Allow an indirect store of an input register. */
1561 instores[indirect-32] = 1;
1562 last_prologue_pc = next_pc;
1565 else if (it == M && ((instr & 0x1ff88000000LL) == 0x0cc80000000LL))
1572 Advance over stores of floating point input registers. Again
1573 one store per register is permitted */
1574 int fM = (int) ((instr & 0x000000fe000LL) >> 13);
1575 int qp = (int) (instr & 0x0000000003fLL);
1576 if (qp == 0 && 8 <= fM && fM < 16 && !infpstores[fM - 8])
1578 infpstores[fM-8] = 1;
1579 last_prologue_pc = next_pc;
1583 && ( ((instr & 0x1ffc8000000LL) == 0x08ec0000000LL)
1584 || ((instr & 0x1efc0000000LL) == 0x0aec0000000LL)))
1586 /* st8.spill [rN] = rM
1588 st8.spill [rN] = rM, imm9 */
1589 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1590 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1591 int qp = (int) (instr & 0x0000000003fLL);
1592 if (qp == 0 && rN == spill_reg && 4 <= rM && rM <= 7)
1594 /* We've found a spill of one of the preserved general purpose
1595 regs. Record the spill address and advance the spill
1596 register if appropriate. */
1597 cache->saved_regs[IA64_GR0_REGNUM + rM] = spill_addr;
1598 if ((instr & 0x1efc0000000LL) == 0x0aec0000000LL)
1599 /* st8.spill [rN] = rM, imm9 */
1600 spill_addr += imm9(instr);
1602 spill_addr = 0; /* Done spilling */
1603 last_prologue_pc = next_pc;
1610 /* If not frameless and we aren't called by skip_prologue, then we need
1611 to calculate registers for the previous frame which will be needed
1614 if (!frameless && this_frame)
1616 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1617 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1619 /* Extract the size of the rotating portion of the stack
1620 frame and the register rename base from the current
1626 rrb_gr = (cfm >> 18) & 0x7f;
1628 /* Find the bof (beginning of frame). */
1629 bof = rse_address_add (cache->bsp, -sof);
1631 for (i = 0, addr = bof;
1635 if (IS_NaT_COLLECTION_ADDR (addr))
1639 if (i+32 == cfm_reg)
1640 cache->saved_regs[IA64_CFM_REGNUM] = addr;
1641 if (i+32 == ret_reg)
1642 cache->saved_regs[IA64_VRAP_REGNUM] = addr;
1644 cache->saved_regs[IA64_VFP_REGNUM] = addr;
1647 /* For the previous argument registers we require the previous bof.
1648 If we can't find the previous cfm, then we can do nothing. */
1650 if (cache->saved_regs[IA64_CFM_REGNUM] != 0)
1652 cfm = read_memory_integer (cache->saved_regs[IA64_CFM_REGNUM],
1655 else if (cfm_reg != 0)
1657 get_frame_register (this_frame, cfm_reg, buf);
1658 cfm = extract_unsigned_integer (buf, 8, byte_order);
1660 cache->prev_cfm = cfm;
1664 sor = ((cfm >> 14) & 0xf) * 8;
1666 sol = (cfm >> 7) & 0x7f;
1667 rrb_gr = (cfm >> 18) & 0x7f;
1669 /* The previous bof only requires subtraction of the sol (size of
1670 locals) due to the overlap between output and input of
1671 subsequent frames. */
1672 bof = rse_address_add (bof, -sol);
1674 for (i = 0, addr = bof;
1678 if (IS_NaT_COLLECTION_ADDR (addr))
1683 cache->saved_regs[IA64_GR32_REGNUM + ((i + (sor - rrb_gr)) % sor)]
1686 cache->saved_regs[IA64_GR32_REGNUM + i] = addr;
1692 /* Try and trust the lim_pc value whenever possible. */
1693 if (trust_limit && lim_pc >= last_prologue_pc)
1694 last_prologue_pc = lim_pc;
1696 cache->frameless = frameless;
1697 cache->after_prologue = last_prologue_pc;
1698 cache->mem_stack_frame_size = mem_stack_frame_size;
1699 cache->fp_reg = fp_reg;
1701 return last_prologue_pc;
1705 ia64_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
1707 struct ia64_frame_cache cache;
1709 cache.after_prologue = 0;
1713 /* Call examine_prologue with - as third argument since we don't have a next frame pointer to send. */
1714 return examine_prologue (pc, pc+1024, 0, &cache);
1718 /* Normal frames. */
1720 static struct ia64_frame_cache *
1721 ia64_frame_cache (struct frame_info *this_frame, void **this_cache)
1723 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1724 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1725 struct ia64_frame_cache *cache;
1727 CORE_ADDR cfm, sof, sol, bsp, psr;
1733 cache = ia64_alloc_frame_cache ();
1734 *this_cache = cache;
1736 get_frame_register (this_frame, sp_regnum, buf);
1737 cache->saved_sp = extract_unsigned_integer (buf, 8, byte_order);
1739 /* We always want the bsp to point to the end of frame.
1740 This way, we can always get the beginning of frame (bof)
1741 by subtracting frame size. */
1742 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
1743 cache->bsp = extract_unsigned_integer (buf, 8, byte_order);
1745 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
1746 psr = extract_unsigned_integer (buf, 8, byte_order);
1748 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
1749 cfm = extract_unsigned_integer (buf, 8, byte_order);
1751 cache->sof = (cfm & 0x7f);
1752 cache->sol = (cfm >> 7) & 0x7f;
1753 cache->sor = ((cfm >> 14) & 0xf) * 8;
1757 cache->pc = get_frame_func (this_frame);
1760 examine_prologue (cache->pc, get_frame_pc (this_frame), this_frame, cache);
1762 cache->base = cache->saved_sp + cache->mem_stack_frame_size;
1768 ia64_frame_this_id (struct frame_info *this_frame, void **this_cache,
1769 struct frame_id *this_id)
1771 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1772 struct ia64_frame_cache *cache =
1773 ia64_frame_cache (this_frame, this_cache);
1775 /* If outermost frame, mark with null frame id. */
1776 if (cache->base == 0)
1777 (*this_id) = null_frame_id;
1779 (*this_id) = frame_id_build_special (cache->base, cache->pc, cache->bsp);
1780 if (gdbarch_debug >= 1)
1781 fprintf_unfiltered (gdb_stdlog,
1782 "regular frame id: code %s, stack %s, special %s, this_frame %s\n",
1783 paddress (gdbarch, this_id->code_addr),
1784 paddress (gdbarch, this_id->stack_addr),
1785 paddress (gdbarch, cache->bsp),
1786 host_address_to_string (this_frame));
1789 static struct value *
1790 ia64_frame_prev_register (struct frame_info *this_frame, void **this_cache,
1793 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1794 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1795 struct ia64_frame_cache *cache = ia64_frame_cache (this_frame, this_cache);
1798 gdb_assert (regnum >= 0);
1800 if (!target_has_registers)
1801 error (_("No registers."));
1803 if (regnum == gdbarch_sp_regnum (gdbarch))
1804 return frame_unwind_got_constant (this_frame, regnum, cache->base);
1806 else if (regnum == IA64_BSP_REGNUM)
1809 CORE_ADDR prev_cfm, bsp, prev_bsp;
1811 /* We want to calculate the previous bsp as the end of the previous
1812 register stack frame. This corresponds to what the hardware bsp
1813 register will be if we pop the frame back which is why we might
1814 have been called. We know the beginning of the current frame is
1815 cache->bsp - cache->sof. This value in the previous frame points
1816 to the start of the output registers. We can calculate the end of
1817 that frame by adding the size of output:
1818 (sof (size of frame) - sol (size of locals)). */
1819 val = ia64_frame_prev_register (this_frame, this_cache, IA64_CFM_REGNUM);
1820 prev_cfm = extract_unsigned_integer (value_contents_all (val),
1822 bsp = rse_address_add (cache->bsp, -(cache->sof));
1824 rse_address_add (bsp, (prev_cfm & 0x7f) - ((prev_cfm >> 7) & 0x7f));
1826 return frame_unwind_got_constant (this_frame, regnum, prev_bsp);
1829 else if (regnum == IA64_CFM_REGNUM)
1831 CORE_ADDR addr = cache->saved_regs[IA64_CFM_REGNUM];
1834 return frame_unwind_got_memory (this_frame, regnum, addr);
1836 if (cache->prev_cfm)
1837 return frame_unwind_got_constant (this_frame, regnum, cache->prev_cfm);
1839 if (cache->frameless)
1840 return frame_unwind_got_register (this_frame, IA64_PFS_REGNUM,
1842 return frame_unwind_got_register (this_frame, regnum, 0);
1845 else if (regnum == IA64_VFP_REGNUM)
1847 /* If the function in question uses an automatic register (r32-r127)
1848 for the frame pointer, it'll be found by ia64_find_saved_register()
1849 above. If the function lacks one of these frame pointers, we can
1850 still provide a value since we know the size of the frame. */
1851 return frame_unwind_got_constant (this_frame, regnum, cache->base);
1854 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
1856 struct value *pr_val;
1859 pr_val = ia64_frame_prev_register (this_frame, this_cache,
1861 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
1863 /* Fetch predicate register rename base from current frame
1864 marker for this frame. */
1865 int rrb_pr = (cache->cfm >> 32) & 0x3f;
1867 /* Adjust the register number to account for register rotation. */
1868 regnum = VP16_REGNUM + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
1870 prN = extract_bit_field (value_contents_all (pr_val),
1871 regnum - VP0_REGNUM, 1);
1872 return frame_unwind_got_constant (this_frame, regnum, prN);
1875 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
1877 struct value *unat_val;
1879 unat_val = ia64_frame_prev_register (this_frame, this_cache,
1881 unatN = extract_bit_field (value_contents_all (unat_val),
1882 regnum - IA64_NAT0_REGNUM, 1);
1883 return frame_unwind_got_constant (this_frame, regnum, unatN);
1886 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
1889 /* Find address of general register corresponding to nat bit we're
1893 gr_addr = cache->saved_regs[regnum - IA64_NAT0_REGNUM + IA64_GR0_REGNUM];
1897 /* Compute address of nat collection bits. */
1898 CORE_ADDR nat_addr = gr_addr | 0x1f8;
1900 CORE_ADDR nat_collection;
1903 /* If our nat collection address is bigger than bsp, we have to get
1904 the nat collection from rnat. Otherwise, we fetch the nat
1905 collection from the computed address. */
1906 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
1907 bsp = extract_unsigned_integer (buf, 8, byte_order);
1908 if (nat_addr >= bsp)
1910 get_frame_register (this_frame, IA64_RNAT_REGNUM, buf);
1911 nat_collection = extract_unsigned_integer (buf, 8, byte_order);
1914 nat_collection = read_memory_integer (nat_addr, 8, byte_order);
1915 nat_bit = (gr_addr >> 3) & 0x3f;
1916 natval = (nat_collection >> nat_bit) & 1;
1919 return frame_unwind_got_constant (this_frame, regnum, natval);
1922 else if (regnum == IA64_IP_REGNUM)
1925 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
1929 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
1930 pc = extract_unsigned_integer (buf, 8, byte_order);
1932 else if (cache->frameless)
1934 get_frame_register (this_frame, IA64_BR0_REGNUM, buf);
1935 pc = extract_unsigned_integer (buf, 8, byte_order);
1938 return frame_unwind_got_constant (this_frame, regnum, pc);
1941 else if (regnum == IA64_PSR_REGNUM)
1943 /* We don't know how to get the complete previous PSR, but we need it
1944 for the slot information when we unwind the pc (pc is formed of IP
1945 register plus slot information from PSR). To get the previous
1946 slot information, we mask it off the return address. */
1947 ULONGEST slot_num = 0;
1950 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
1952 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
1953 psr = extract_unsigned_integer (buf, 8, byte_order);
1957 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
1958 pc = extract_unsigned_integer (buf, 8, byte_order);
1960 else if (cache->frameless)
1962 get_frame_register (this_frame, IA64_BR0_REGNUM, buf);
1963 pc = extract_unsigned_integer (buf, 8, byte_order);
1965 psr &= ~(3LL << 41);
1966 slot_num = pc & 0x3LL;
1967 psr |= (CORE_ADDR)slot_num << 41;
1968 return frame_unwind_got_constant (this_frame, regnum, psr);
1971 else if (regnum == IA64_BR0_REGNUM)
1973 CORE_ADDR addr = cache->saved_regs[IA64_BR0_REGNUM];
1976 return frame_unwind_got_memory (this_frame, regnum, addr);
1978 return frame_unwind_got_constant (this_frame, regnum, 0);
1981 else if ((regnum >= IA64_GR32_REGNUM && regnum <= IA64_GR127_REGNUM)
1982 || (regnum >= V32_REGNUM && regnum <= V127_REGNUM))
1986 if (regnum >= V32_REGNUM)
1987 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
1988 addr = cache->saved_regs[regnum];
1990 return frame_unwind_got_memory (this_frame, regnum, addr);
1992 if (cache->frameless)
1994 struct value *reg_val;
1995 CORE_ADDR prev_cfm, prev_bsp, prev_bof;
1997 /* FIXME: brobecker/2008-05-01: Doesn't this seem redundant
1998 with the same code above? */
1999 if (regnum >= V32_REGNUM)
2000 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
2001 reg_val = ia64_frame_prev_register (this_frame, this_cache,
2003 prev_cfm = extract_unsigned_integer (value_contents_all (reg_val),
2005 reg_val = ia64_frame_prev_register (this_frame, this_cache,
2007 prev_bsp = extract_unsigned_integer (value_contents_all (reg_val),
2009 prev_bof = rse_address_add (prev_bsp, -(prev_cfm & 0x7f));
2011 addr = rse_address_add (prev_bof, (regnum - IA64_GR32_REGNUM));
2012 return frame_unwind_got_memory (this_frame, regnum, addr);
2015 return frame_unwind_got_constant (this_frame, regnum, 0);
2018 else /* All other registers. */
2022 if (IA64_FR32_REGNUM <= regnum && regnum <= IA64_FR127_REGNUM)
2024 /* Fetch floating point register rename base from current
2025 frame marker for this frame. */
2026 int rrb_fr = (cache->cfm >> 25) & 0x7f;
2028 /* Adjust the floating point register number to account for
2029 register rotation. */
2030 regnum = IA64_FR32_REGNUM
2031 + ((regnum - IA64_FR32_REGNUM) + rrb_fr) % 96;
2034 /* If we have stored a memory address, access the register. */
2035 addr = cache->saved_regs[regnum];
2037 return frame_unwind_got_memory (this_frame, regnum, addr);
2038 /* Otherwise, punt and get the current value of the register. */
2040 return frame_unwind_got_register (this_frame, regnum, regnum);
2044 static const struct frame_unwind ia64_frame_unwind =
2047 &ia64_frame_this_id,
2048 &ia64_frame_prev_register,
2050 default_frame_sniffer
2053 /* Signal trampolines. */
2056 ia64_sigtramp_frame_init_saved_regs (struct frame_info *this_frame,
2057 struct ia64_frame_cache *cache)
2059 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2060 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
2062 if (tdep->sigcontext_register_address)
2066 cache->saved_regs[IA64_VRAP_REGNUM] =
2067 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_IP_REGNUM);
2068 cache->saved_regs[IA64_CFM_REGNUM] =
2069 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_CFM_REGNUM);
2070 cache->saved_regs[IA64_PSR_REGNUM] =
2071 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_PSR_REGNUM);
2072 cache->saved_regs[IA64_BSP_REGNUM] =
2073 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_BSP_REGNUM);
2074 cache->saved_regs[IA64_RNAT_REGNUM] =
2075 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_RNAT_REGNUM);
2076 cache->saved_regs[IA64_CCV_REGNUM] =
2077 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_CCV_REGNUM);
2078 cache->saved_regs[IA64_UNAT_REGNUM] =
2079 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_UNAT_REGNUM);
2080 cache->saved_regs[IA64_FPSR_REGNUM] =
2081 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_FPSR_REGNUM);
2082 cache->saved_regs[IA64_PFS_REGNUM] =
2083 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_PFS_REGNUM);
2084 cache->saved_regs[IA64_LC_REGNUM] =
2085 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_LC_REGNUM);
2086 for (regno = IA64_GR1_REGNUM; regno <= IA64_GR31_REGNUM; regno++)
2087 cache->saved_regs[regno] =
2088 tdep->sigcontext_register_address (gdbarch, cache->base, regno);
2089 for (regno = IA64_BR0_REGNUM; regno <= IA64_BR7_REGNUM; regno++)
2090 cache->saved_regs[regno] =
2091 tdep->sigcontext_register_address (gdbarch, cache->base, regno);
2092 for (regno = IA64_FR2_REGNUM; regno <= IA64_FR31_REGNUM; regno++)
2093 cache->saved_regs[regno] =
2094 tdep->sigcontext_register_address (gdbarch, cache->base, regno);
2098 static struct ia64_frame_cache *
2099 ia64_sigtramp_frame_cache (struct frame_info *this_frame, void **this_cache)
2101 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2102 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2103 struct ia64_frame_cache *cache;
2111 cache = ia64_alloc_frame_cache ();
2113 get_frame_register (this_frame, sp_regnum, buf);
2114 /* Note that frame size is hard-coded below. We cannot calculate it
2115 via prologue examination. */
2116 cache->base = extract_unsigned_integer (buf, 8, byte_order) + 16;
2118 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2119 cache->bsp = extract_unsigned_integer (buf, 8, byte_order);
2121 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2122 cache->cfm = extract_unsigned_integer (buf, 8, byte_order);
2123 cache->sof = cache->cfm & 0x7f;
2125 ia64_sigtramp_frame_init_saved_regs (this_frame, cache);
2127 *this_cache = cache;
2132 ia64_sigtramp_frame_this_id (struct frame_info *this_frame,
2133 void **this_cache, struct frame_id *this_id)
2135 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2136 struct ia64_frame_cache *cache =
2137 ia64_sigtramp_frame_cache (this_frame, this_cache);
2139 (*this_id) = frame_id_build_special (cache->base,
2140 get_frame_pc (this_frame),
2142 if (gdbarch_debug >= 1)
2143 fprintf_unfiltered (gdb_stdlog,
2144 "sigtramp frame id: code %s, stack %s, special %s, this_frame %s\n",
2145 paddress (gdbarch, this_id->code_addr),
2146 paddress (gdbarch, this_id->stack_addr),
2147 paddress (gdbarch, cache->bsp),
2148 host_address_to_string (this_frame));
2151 static struct value *
2152 ia64_sigtramp_frame_prev_register (struct frame_info *this_frame,
2153 void **this_cache, int regnum)
2155 char buf[MAX_REGISTER_SIZE];
2157 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2158 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2159 struct ia64_frame_cache *cache =
2160 ia64_sigtramp_frame_cache (this_frame, this_cache);
2162 gdb_assert (regnum >= 0);
2164 if (!target_has_registers)
2165 error (_("No registers."));
2167 if (regnum == IA64_IP_REGNUM)
2170 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
2174 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
2175 pc = extract_unsigned_integer (buf, 8, byte_order);
2178 return frame_unwind_got_constant (this_frame, regnum, pc);
2181 else if ((regnum >= IA64_GR32_REGNUM && regnum <= IA64_GR127_REGNUM)
2182 || (regnum >= V32_REGNUM && regnum <= V127_REGNUM))
2186 if (regnum >= V32_REGNUM)
2187 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
2188 addr = cache->saved_regs[regnum];
2190 return frame_unwind_got_memory (this_frame, regnum, addr);
2192 return frame_unwind_got_constant (this_frame, regnum, 0);
2195 else /* All other registers not listed above. */
2197 CORE_ADDR addr = cache->saved_regs[regnum];
2200 return frame_unwind_got_memory (this_frame, regnum, addr);
2202 return frame_unwind_got_constant (this_frame, regnum, 0);
2207 ia64_sigtramp_frame_sniffer (const struct frame_unwind *self,
2208 struct frame_info *this_frame,
2211 struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame));
2212 if (tdep->pc_in_sigtramp)
2214 CORE_ADDR pc = get_frame_pc (this_frame);
2216 if (tdep->pc_in_sigtramp (pc))
2223 static const struct frame_unwind ia64_sigtramp_frame_unwind =
2226 ia64_sigtramp_frame_this_id,
2227 ia64_sigtramp_frame_prev_register,
2229 ia64_sigtramp_frame_sniffer
2235 ia64_frame_base_address (struct frame_info *this_frame, void **this_cache)
2237 struct ia64_frame_cache *cache = ia64_frame_cache (this_frame, this_cache);
2242 static const struct frame_base ia64_frame_base =
2245 ia64_frame_base_address,
2246 ia64_frame_base_address,
2247 ia64_frame_base_address
2250 #ifdef HAVE_LIBUNWIND_IA64_H
2252 struct ia64_unwind_table_entry
2254 unw_word_t start_offset;
2255 unw_word_t end_offset;
2256 unw_word_t info_offset;
2259 static __inline__ uint64_t
2260 ia64_rse_slot_num (uint64_t addr)
2262 return (addr >> 3) & 0x3f;
2265 /* Skip over a designated number of registers in the backing
2266 store, remembering every 64th position is for NAT. */
2267 static __inline__ uint64_t
2268 ia64_rse_skip_regs (uint64_t addr, long num_regs)
2270 long delta = ia64_rse_slot_num(addr) + num_regs;
2274 return addr + ((num_regs + delta/0x3f) << 3);
2277 /* Gdb libunwind-frame callback function to convert from an ia64 gdb register
2278 number to a libunwind register number. */
2280 ia64_gdb2uw_regnum (int regnum)
2282 if (regnum == sp_regnum)
2284 else if (regnum == IA64_BSP_REGNUM)
2285 return UNW_IA64_BSP;
2286 else if ((unsigned) (regnum - IA64_GR0_REGNUM) < 128)
2287 return UNW_IA64_GR + (regnum - IA64_GR0_REGNUM);
2288 else if ((unsigned) (regnum - V32_REGNUM) < 95)
2289 return UNW_IA64_GR + 32 + (regnum - V32_REGNUM);
2290 else if ((unsigned) (regnum - IA64_FR0_REGNUM) < 128)
2291 return UNW_IA64_FR + (regnum - IA64_FR0_REGNUM);
2292 else if ((unsigned) (regnum - IA64_PR0_REGNUM) < 64)
2294 else if ((unsigned) (regnum - IA64_BR0_REGNUM) < 8)
2295 return UNW_IA64_BR + (regnum - IA64_BR0_REGNUM);
2296 else if (regnum == IA64_PR_REGNUM)
2298 else if (regnum == IA64_IP_REGNUM)
2300 else if (regnum == IA64_CFM_REGNUM)
2301 return UNW_IA64_CFM;
2302 else if ((unsigned) (regnum - IA64_AR0_REGNUM) < 128)
2303 return UNW_IA64_AR + (regnum - IA64_AR0_REGNUM);
2304 else if ((unsigned) (regnum - IA64_NAT0_REGNUM) < 128)
2305 return UNW_IA64_NAT + (regnum - IA64_NAT0_REGNUM);
2310 /* Gdb libunwind-frame callback function to convert from a libunwind register
2311 number to a ia64 gdb register number. */
2313 ia64_uw2gdb_regnum (int uw_regnum)
2315 if (uw_regnum == UNW_IA64_SP)
2317 else if (uw_regnum == UNW_IA64_BSP)
2318 return IA64_BSP_REGNUM;
2319 else if ((unsigned) (uw_regnum - UNW_IA64_GR) < 32)
2320 return IA64_GR0_REGNUM + (uw_regnum - UNW_IA64_GR);
2321 else if ((unsigned) (uw_regnum - UNW_IA64_GR) < 128)
2322 return V32_REGNUM + (uw_regnum - (IA64_GR0_REGNUM + 32));
2323 else if ((unsigned) (uw_regnum - UNW_IA64_FR) < 128)
2324 return IA64_FR0_REGNUM + (uw_regnum - UNW_IA64_FR);
2325 else if ((unsigned) (uw_regnum - UNW_IA64_BR) < 8)
2326 return IA64_BR0_REGNUM + (uw_regnum - UNW_IA64_BR);
2327 else if (uw_regnum == UNW_IA64_PR)
2328 return IA64_PR_REGNUM;
2329 else if (uw_regnum == UNW_REG_IP)
2330 return IA64_IP_REGNUM;
2331 else if (uw_regnum == UNW_IA64_CFM)
2332 return IA64_CFM_REGNUM;
2333 else if ((unsigned) (uw_regnum - UNW_IA64_AR) < 128)
2334 return IA64_AR0_REGNUM + (uw_regnum - UNW_IA64_AR);
2335 else if ((unsigned) (uw_regnum - UNW_IA64_NAT) < 128)
2336 return IA64_NAT0_REGNUM + (uw_regnum - UNW_IA64_NAT);
2341 /* Gdb libunwind-frame callback function to reveal if register is a float
2344 ia64_is_fpreg (int uw_regnum)
2346 return unw_is_fpreg (uw_regnum);
2349 /* Libunwind callback accessor function for general registers. */
2351 ia64_access_reg (unw_addr_space_t as, unw_regnum_t uw_regnum, unw_word_t *val,
2352 int write, void *arg)
2354 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2355 unw_word_t bsp, sof, sol, cfm, psr, ip;
2356 struct frame_info *this_frame = arg;
2357 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2358 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2359 long new_sof, old_sof;
2360 char buf[MAX_REGISTER_SIZE];
2362 /* We never call any libunwind routines that need to write registers. */
2363 gdb_assert (!write);
2368 /* Libunwind expects to see the pc value which means the slot number
2369 from the psr must be merged with the ip word address. */
2370 get_frame_register (this_frame, IA64_IP_REGNUM, buf);
2371 ip = extract_unsigned_integer (buf, 8, byte_order);
2372 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
2373 psr = extract_unsigned_integer (buf, 8, byte_order);
2374 *val = ip | ((psr >> 41) & 0x3);
2377 case UNW_IA64_AR_BSP:
2378 /* Libunwind expects to see the beginning of the current register
2379 frame so we must account for the fact that ptrace() will return a value
2380 for bsp that points *after* the current register frame. */
2381 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2382 bsp = extract_unsigned_integer (buf, 8, byte_order);
2383 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2384 cfm = extract_unsigned_integer (buf, 8, byte_order);
2386 *val = ia64_rse_skip_regs (bsp, -sof);
2389 case UNW_IA64_AR_BSPSTORE:
2390 /* Libunwind wants bspstore to be after the current register frame.
2391 This is what ptrace() and gdb treats as the regular bsp value. */
2392 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2393 *val = extract_unsigned_integer (buf, 8, byte_order);
2397 /* For all other registers, just unwind the value directly. */
2398 get_frame_register (this_frame, regnum, buf);
2399 *val = extract_unsigned_integer (buf, 8, byte_order);
2403 if (gdbarch_debug >= 1)
2404 fprintf_unfiltered (gdb_stdlog,
2405 " access_reg: from cache: %4s=%s\n",
2406 (((unsigned) regnum <= IA64_NAT127_REGNUM)
2407 ? ia64_register_names[regnum] : "r??"),
2408 paddress (gdbarch, *val));
2412 /* Libunwind callback accessor function for floating-point registers. */
2414 ia64_access_fpreg (unw_addr_space_t as, unw_regnum_t uw_regnum, unw_fpreg_t *val,
2415 int write, void *arg)
2417 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2418 struct frame_info *this_frame = arg;
2420 /* We never call any libunwind routines that need to write registers. */
2421 gdb_assert (!write);
2423 get_frame_register (this_frame, regnum, (char *) val);
2428 /* Libunwind callback accessor function for top-level rse registers. */
2430 ia64_access_rse_reg (unw_addr_space_t as, unw_regnum_t uw_regnum, unw_word_t *val,
2431 int write, void *arg)
2433 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2434 unw_word_t bsp, sof, sol, cfm, psr, ip;
2435 struct regcache *regcache = arg;
2436 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2437 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2438 long new_sof, old_sof;
2439 char buf[MAX_REGISTER_SIZE];
2441 /* We never call any libunwind routines that need to write registers. */
2442 gdb_assert (!write);
2447 /* Libunwind expects to see the pc value which means the slot number
2448 from the psr must be merged with the ip word address. */
2449 regcache_cooked_read (regcache, IA64_IP_REGNUM, buf);
2450 ip = extract_unsigned_integer (buf, 8, byte_order);
2451 regcache_cooked_read (regcache, IA64_PSR_REGNUM, buf);
2452 psr = extract_unsigned_integer (buf, 8, byte_order);
2453 *val = ip | ((psr >> 41) & 0x3);
2456 case UNW_IA64_AR_BSP:
2457 /* Libunwind expects to see the beginning of the current register
2458 frame so we must account for the fact that ptrace() will return a value
2459 for bsp that points *after* the current register frame. */
2460 regcache_cooked_read (regcache, IA64_BSP_REGNUM, buf);
2461 bsp = extract_unsigned_integer (buf, 8, byte_order);
2462 regcache_cooked_read (regcache, IA64_CFM_REGNUM, buf);
2463 cfm = extract_unsigned_integer (buf, 8, byte_order);
2465 *val = ia64_rse_skip_regs (bsp, -sof);
2468 case UNW_IA64_AR_BSPSTORE:
2469 /* Libunwind wants bspstore to be after the current register frame.
2470 This is what ptrace() and gdb treats as the regular bsp value. */
2471 regcache_cooked_read (regcache, IA64_BSP_REGNUM, buf);
2472 *val = extract_unsigned_integer (buf, 8, byte_order);
2476 /* For all other registers, just unwind the value directly. */
2477 regcache_cooked_read (regcache, regnum, buf);
2478 *val = extract_unsigned_integer (buf, 8, byte_order);
2482 if (gdbarch_debug >= 1)
2483 fprintf_unfiltered (gdb_stdlog,
2484 " access_rse_reg: from cache: %4s=%s\n",
2485 (((unsigned) regnum <= IA64_NAT127_REGNUM)
2486 ? ia64_register_names[regnum] : "r??"),
2487 paddress (gdbarch, *val));
2492 /* Libunwind callback accessor function for top-level fp registers. */
2494 ia64_access_rse_fpreg (unw_addr_space_t as, unw_regnum_t uw_regnum,
2495 unw_fpreg_t *val, int write, void *arg)
2497 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2498 struct regcache *regcache = arg;
2500 /* We never call any libunwind routines that need to write registers. */
2501 gdb_assert (!write);
2503 regcache_cooked_read (regcache, regnum, (char *) val);
2508 /* Libunwind callback accessor function for accessing memory. */
2510 ia64_access_mem (unw_addr_space_t as,
2511 unw_word_t addr, unw_word_t *val,
2512 int write, void *arg)
2514 if (addr - KERNEL_START < ktab_size)
2516 unw_word_t *laddr = (unw_word_t*) ((char *) ktab
2517 + (addr - KERNEL_START));
2526 /* XXX do we need to normalize byte-order here? */
2528 return target_write_memory (addr, (char *) val, sizeof (unw_word_t));
2530 return target_read_memory (addr, (char *) val, sizeof (unw_word_t));
2533 /* Call low-level function to access the kernel unwind table. */
2535 getunwind_table (gdb_byte **buf_p)
2539 /* FIXME drow/2005-09-10: This code used to call
2540 ia64_linux_xfer_unwind_table directly to fetch the unwind table
2541 for the currently running ia64-linux kernel. That data should
2542 come from the core file and be accessed via the auxv vector; if
2543 we want to preserve fall back to the running kernel's table, then
2544 we should find a way to override the corefile layer's
2545 xfer_partial method. */
2547 x = target_read_alloc (¤t_target, TARGET_OBJECT_UNWIND_TABLE,
2553 /* Get the kernel unwind table. */
2555 get_kernel_table (unw_word_t ip, unw_dyn_info_t *di)
2557 static struct ia64_table_entry *etab;
2564 size = getunwind_table (&ktab_buf);
2566 return -UNW_ENOINFO;
2568 ktab = (struct ia64_table_entry *) ktab_buf;
2571 for (etab = ktab; etab->start_offset; ++etab)
2572 etab->info_offset += KERNEL_START;
2575 if (ip < ktab[0].start_offset || ip >= etab[-1].end_offset)
2576 return -UNW_ENOINFO;
2578 di->format = UNW_INFO_FORMAT_TABLE;
2580 di->start_ip = ktab[0].start_offset;
2581 di->end_ip = etab[-1].end_offset;
2582 di->u.ti.name_ptr = (unw_word_t) "<kernel>";
2583 di->u.ti.segbase = 0;
2584 di->u.ti.table_len = ((char *) etab - (char *) ktab) / sizeof (unw_word_t);
2585 di->u.ti.table_data = (unw_word_t *) ktab;
2587 if (gdbarch_debug >= 1)
2588 fprintf_unfiltered (gdb_stdlog, "get_kernel_table: found table `%s': "
2589 "segbase=%s, length=%s, gp=%s\n",
2590 (char *) di->u.ti.name_ptr,
2591 hex_string (di->u.ti.segbase),
2592 pulongest (di->u.ti.table_len),
2593 hex_string (di->gp));
2597 /* Find the unwind table entry for a specified address. */
2599 ia64_find_unwind_table (struct objfile *objfile, unw_word_t ip,
2600 unw_dyn_info_t *dip, void **buf)
2602 Elf_Internal_Phdr *phdr, *p_text = NULL, *p_unwind = NULL;
2603 Elf_Internal_Ehdr *ehdr;
2604 unw_word_t segbase = 0;
2605 CORE_ADDR load_base;
2609 bfd = objfile->obfd;
2611 ehdr = elf_tdata (bfd)->elf_header;
2612 phdr = elf_tdata (bfd)->phdr;
2614 load_base = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2616 for (i = 0; i < ehdr->e_phnum; ++i)
2618 switch (phdr[i].p_type)
2621 if ((unw_word_t) (ip - load_base - phdr[i].p_vaddr)
2626 case PT_IA_64_UNWIND:
2627 p_unwind = phdr + i;
2635 if (!p_text || !p_unwind)
2636 return -UNW_ENOINFO;
2638 /* Verify that the segment that contains the IP also contains
2639 the static unwind table. If not, we may be in the Linux kernel's
2640 DSO gate page in which case the unwind table is another segment.
2641 Otherwise, we are dealing with runtime-generated code, for which we
2642 have no info here. */
2643 segbase = p_text->p_vaddr + load_base;
2645 if ((p_unwind->p_vaddr - p_text->p_vaddr) >= p_text->p_memsz)
2648 for (i = 0; i < ehdr->e_phnum; ++i)
2650 if (phdr[i].p_type == PT_LOAD
2651 && (p_unwind->p_vaddr - phdr[i].p_vaddr) < phdr[i].p_memsz)
2654 /* Get the segbase from the section containing the
2656 segbase = phdr[i].p_vaddr + load_base;
2660 return -UNW_ENOINFO;
2663 dip->start_ip = p_text->p_vaddr + load_base;
2664 dip->end_ip = dip->start_ip + p_text->p_memsz;
2665 dip->gp = ia64_find_global_pointer (get_objfile_arch (objfile), ip);
2666 dip->format = UNW_INFO_FORMAT_REMOTE_TABLE;
2667 dip->u.rti.name_ptr = (unw_word_t) bfd_get_filename (bfd);
2668 dip->u.rti.segbase = segbase;
2669 dip->u.rti.table_len = p_unwind->p_memsz / sizeof (unw_word_t);
2670 dip->u.rti.table_data = p_unwind->p_vaddr + load_base;
2675 /* Libunwind callback accessor function to acquire procedure unwind-info. */
2677 ia64_find_proc_info_x (unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
2678 int need_unwind_info, void *arg)
2680 struct obj_section *sec = find_pc_section (ip);
2687 /* XXX This only works if the host and the target architecture are
2688 both ia64 and if the have (more or less) the same kernel
2690 if (get_kernel_table (ip, &di) < 0)
2691 return -UNW_ENOINFO;
2693 if (gdbarch_debug >= 1)
2694 fprintf_unfiltered (gdb_stdlog, "ia64_find_proc_info_x: %s -> "
2695 "(name=`%s',segbase=%s,start=%s,end=%s,gp=%s,"
2696 "length=%s,data=%s)\n",
2697 hex_string (ip), (char *)di.u.ti.name_ptr,
2698 hex_string (di.u.ti.segbase),
2699 hex_string (di.start_ip), hex_string (di.end_ip),
2701 pulongest (di.u.ti.table_len),
2702 hex_string ((CORE_ADDR)di.u.ti.table_data));
2706 ret = ia64_find_unwind_table (sec->objfile, ip, &di, &buf);
2710 if (gdbarch_debug >= 1)
2711 fprintf_unfiltered (gdb_stdlog, "ia64_find_proc_info_x: %s -> "
2712 "(name=`%s',segbase=%s,start=%s,end=%s,gp=%s,"
2713 "length=%s,data=%s)\n",
2714 hex_string (ip), (char *)di.u.rti.name_ptr,
2715 hex_string (di.u.rti.segbase),
2716 hex_string (di.start_ip), hex_string (di.end_ip),
2718 pulongest (di.u.rti.table_len),
2719 hex_string (di.u.rti.table_data));
2722 ret = libunwind_search_unwind_table (&as, ip, &di, pi, need_unwind_info,
2725 /* We no longer need the dyn info storage so free it. */
2731 /* Libunwind callback accessor function for cleanup. */
2733 ia64_put_unwind_info (unw_addr_space_t as,
2734 unw_proc_info_t *pip, void *arg)
2736 /* Nothing required for now. */
2739 /* Libunwind callback accessor function to get head of the dynamic
2740 unwind-info registration list. */
2742 ia64_get_dyn_info_list (unw_addr_space_t as,
2743 unw_word_t *dilap, void *arg)
2745 struct obj_section *text_sec;
2746 struct objfile *objfile;
2747 unw_word_t ip, addr;
2751 if (!libunwind_is_initialized ())
2752 return -UNW_ENOINFO;
2754 for (objfile = object_files; objfile; objfile = objfile->next)
2758 text_sec = objfile->sections + SECT_OFF_TEXT (objfile);
2759 ip = obj_section_addr (text_sec);
2760 ret = ia64_find_unwind_table (objfile, ip, &di, &buf);
2763 addr = libunwind_find_dyn_list (as, &di, arg);
2764 /* We no longer need the dyn info storage so free it. */
2769 if (gdbarch_debug >= 1)
2770 fprintf_unfiltered (gdb_stdlog,
2771 "dynamic unwind table in objfile %s "
2773 bfd_get_filename (objfile->obfd),
2774 hex_string (addr), hex_string (di.gp));
2780 return -UNW_ENOINFO;
2784 /* Frame interface functions for libunwind. */
2787 ia64_libunwind_frame_this_id (struct frame_info *this_frame, void **this_cache,
2788 struct frame_id *this_id)
2790 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2791 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2797 libunwind_frame_this_id (this_frame, this_cache, &id);
2798 if (frame_id_eq (id, null_frame_id))
2800 (*this_id) = null_frame_id;
2804 /* We must add the bsp as the special address for frame comparison
2806 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2807 bsp = extract_unsigned_integer (buf, 8, byte_order);
2809 (*this_id) = frame_id_build_special (id.stack_addr, id.code_addr, bsp);
2811 if (gdbarch_debug >= 1)
2812 fprintf_unfiltered (gdb_stdlog,
2813 "libunwind frame id: code %s, stack %s, special %s, this_frame %s\n",
2814 paddress (gdbarch, id.code_addr),
2815 paddress (gdbarch, id.stack_addr),
2816 paddress (gdbarch, bsp),
2817 host_address_to_string (this_frame));
2820 static struct value *
2821 ia64_libunwind_frame_prev_register (struct frame_info *this_frame,
2822 void **this_cache, int regnum)
2825 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2826 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2829 if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
2830 reg = IA64_PR_REGNUM;
2831 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
2832 reg = IA64_UNAT_REGNUM;
2834 /* Let libunwind do most of the work. */
2835 val = libunwind_frame_prev_register (this_frame, this_cache, reg);
2837 if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
2841 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
2845 unsigned char buf[MAX_REGISTER_SIZE];
2847 /* Fetch predicate register rename base from current frame
2848 marker for this frame. */
2849 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2850 cfm = extract_unsigned_integer (buf, 8, byte_order);
2851 rrb_pr = (cfm >> 32) & 0x3f;
2853 /* Adjust the register number to account for register rotation. */
2854 regnum = VP16_REGNUM + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
2856 prN_val = extract_bit_field (value_contents_all (val),
2857 regnum - VP0_REGNUM, 1);
2858 return frame_unwind_got_constant (this_frame, regnum, prN_val);
2861 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
2865 unatN_val = extract_bit_field (value_contents_all (val),
2866 regnum - IA64_NAT0_REGNUM, 1);
2867 return frame_unwind_got_constant (this_frame, regnum, unatN_val);
2870 else if (regnum == IA64_BSP_REGNUM)
2872 struct value *cfm_val;
2873 CORE_ADDR prev_bsp, prev_cfm;
2875 /* We want to calculate the previous bsp as the end of the previous
2876 register stack frame. This corresponds to what the hardware bsp
2877 register will be if we pop the frame back which is why we might
2878 have been called. We know that libunwind will pass us back the
2879 beginning of the current frame so we should just add sof to it. */
2880 prev_bsp = extract_unsigned_integer (value_contents_all (val),
2882 cfm_val = libunwind_frame_prev_register (this_frame, this_cache,
2884 prev_cfm = extract_unsigned_integer (value_contents_all (cfm_val),
2886 prev_bsp = rse_address_add (prev_bsp, (prev_cfm & 0x7f));
2888 return frame_unwind_got_constant (this_frame, regnum, prev_bsp);
2895 ia64_libunwind_frame_sniffer (const struct frame_unwind *self,
2896 struct frame_info *this_frame,
2899 if (libunwind_is_initialized ()
2900 && libunwind_frame_sniffer (self, this_frame, this_cache))
2906 static const struct frame_unwind ia64_libunwind_frame_unwind =
2909 ia64_libunwind_frame_this_id,
2910 ia64_libunwind_frame_prev_register,
2912 ia64_libunwind_frame_sniffer,
2913 libunwind_frame_dealloc_cache
2917 ia64_libunwind_sigtramp_frame_this_id (struct frame_info *this_frame,
2919 struct frame_id *this_id)
2921 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2922 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2928 libunwind_frame_this_id (this_frame, this_cache, &id);
2929 if (frame_id_eq (id, null_frame_id))
2931 (*this_id) = null_frame_id;
2935 /* We must add the bsp as the special address for frame comparison
2937 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2938 bsp = extract_unsigned_integer (buf, 8, byte_order);
2940 /* For a sigtramp frame, we don't make the check for previous ip being 0. */
2941 (*this_id) = frame_id_build_special (id.stack_addr, id.code_addr, bsp);
2943 if (gdbarch_debug >= 1)
2944 fprintf_unfiltered (gdb_stdlog,
2945 "libunwind sigtramp frame id: code %s, stack %s, special %s, this_frame %s\n",
2946 paddress (gdbarch, id.code_addr),
2947 paddress (gdbarch, id.stack_addr),
2948 paddress (gdbarch, bsp),
2949 host_address_to_string (this_frame));
2952 static struct value *
2953 ia64_libunwind_sigtramp_frame_prev_register (struct frame_info *this_frame,
2954 void **this_cache, int regnum)
2956 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2957 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2958 struct value *prev_ip_val;
2961 /* If the previous frame pc value is 0, then we want to use the SIGCONTEXT
2962 method of getting previous registers. */
2963 prev_ip_val = libunwind_frame_prev_register (this_frame, this_cache,
2965 prev_ip = extract_unsigned_integer (value_contents_all (prev_ip_val),
2970 void *tmp_cache = NULL;
2971 return ia64_sigtramp_frame_prev_register (this_frame, &tmp_cache,
2975 return ia64_libunwind_frame_prev_register (this_frame, this_cache, regnum);
2979 ia64_libunwind_sigtramp_frame_sniffer (const struct frame_unwind *self,
2980 struct frame_info *this_frame,
2983 if (libunwind_is_initialized ())
2985 if (libunwind_sigtramp_frame_sniffer (self, this_frame, this_cache))
2990 return ia64_sigtramp_frame_sniffer (self, this_frame, this_cache);
2993 static const struct frame_unwind ia64_libunwind_sigtramp_frame_unwind =
2996 ia64_libunwind_sigtramp_frame_this_id,
2997 ia64_libunwind_sigtramp_frame_prev_register,
2999 ia64_libunwind_sigtramp_frame_sniffer
3002 /* Set of libunwind callback acccessor functions. */
3003 static unw_accessors_t ia64_unw_accessors =
3005 ia64_find_proc_info_x,
3006 ia64_put_unwind_info,
3007 ia64_get_dyn_info_list,
3015 /* Set of special libunwind callback acccessor functions specific for accessing
3016 the rse registers. At the top of the stack, we want libunwind to figure out
3017 how to read r32 - r127. Though usually they are found sequentially in memory
3018 starting from $bof, this is not always true. */
3019 static unw_accessors_t ia64_unw_rse_accessors =
3021 ia64_find_proc_info_x,
3022 ia64_put_unwind_info,
3023 ia64_get_dyn_info_list,
3025 ia64_access_rse_reg,
3026 ia64_access_rse_fpreg,
3031 /* Set of ia64 gdb libunwind-frame callbacks and data for generic libunwind-frame code to use. */
3032 static struct libunwind_descr ia64_libunwind_descr =
3037 &ia64_unw_accessors,
3038 &ia64_unw_rse_accessors,
3041 #endif /* HAVE_LIBUNWIND_IA64_H */
3044 ia64_use_struct_convention (struct type *type)
3046 struct type *float_elt_type;
3048 /* Don't use the struct convention for anything but structure,
3049 union, or array types. */
3050 if (!(TYPE_CODE (type) == TYPE_CODE_STRUCT
3051 || TYPE_CODE (type) == TYPE_CODE_UNION
3052 || TYPE_CODE (type) == TYPE_CODE_ARRAY))
3055 /* HFAs are structures (or arrays) consisting entirely of floating
3056 point values of the same length. Up to 8 of these are returned
3057 in registers. Don't use the struct convention when this is the
3059 float_elt_type = is_float_or_hfa_type (type);
3060 if (float_elt_type != NULL
3061 && TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type) <= 8)
3064 /* Other structs of length 32 or less are returned in r8-r11.
3065 Don't use the struct convention for those either. */
3066 return TYPE_LENGTH (type) > 32;
3070 ia64_extract_return_value (struct type *type, struct regcache *regcache,
3073 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3074 struct type *float_elt_type;
3076 float_elt_type = is_float_or_hfa_type (type);
3077 if (float_elt_type != NULL)
3079 char from[MAX_REGISTER_SIZE];
3081 int regnum = IA64_FR8_REGNUM;
3082 int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type);
3086 regcache_cooked_read (regcache, regnum, from);
3087 convert_typed_floating (from, ia64_ext_type (gdbarch),
3088 (char *)valbuf + offset, float_elt_type);
3089 offset += TYPE_LENGTH (float_elt_type);
3097 int regnum = IA64_GR8_REGNUM;
3098 int reglen = TYPE_LENGTH (register_type (gdbarch, IA64_GR8_REGNUM));
3099 int n = TYPE_LENGTH (type) / reglen;
3100 int m = TYPE_LENGTH (type) % reglen;
3105 regcache_cooked_read_unsigned (regcache, regnum, &val);
3106 memcpy ((char *)valbuf + offset, &val, reglen);
3113 regcache_cooked_read_unsigned (regcache, regnum, &val);
3114 memcpy ((char *)valbuf + offset, &val, m);
3120 ia64_store_return_value (struct type *type, struct regcache *regcache,
3121 const gdb_byte *valbuf)
3123 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3124 struct type *float_elt_type;
3126 float_elt_type = is_float_or_hfa_type (type);
3127 if (float_elt_type != NULL)
3129 char to[MAX_REGISTER_SIZE];
3131 int regnum = IA64_FR8_REGNUM;
3132 int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type);
3136 convert_typed_floating ((char *)valbuf + offset, float_elt_type,
3137 to, ia64_ext_type (gdbarch));
3138 regcache_cooked_write (regcache, regnum, to);
3139 offset += TYPE_LENGTH (float_elt_type);
3147 int regnum = IA64_GR8_REGNUM;
3148 int reglen = TYPE_LENGTH (register_type (gdbarch, IA64_GR8_REGNUM));
3149 int n = TYPE_LENGTH (type) / reglen;
3150 int m = TYPE_LENGTH (type) % reglen;
3155 memcpy (&val, (char *)valbuf + offset, reglen);
3156 regcache_cooked_write_unsigned (regcache, regnum, val);
3163 memcpy (&val, (char *)valbuf + offset, m);
3164 regcache_cooked_write_unsigned (regcache, regnum, val);
3169 static enum return_value_convention
3170 ia64_return_value (struct gdbarch *gdbarch, struct type *func_type,
3171 struct type *valtype, struct regcache *regcache,
3172 gdb_byte *readbuf, const gdb_byte *writebuf)
3174 int struct_return = ia64_use_struct_convention (valtype);
3176 if (writebuf != NULL)
3178 gdb_assert (!struct_return);
3179 ia64_store_return_value (valtype, regcache, writebuf);
3182 if (readbuf != NULL)
3184 gdb_assert (!struct_return);
3185 ia64_extract_return_value (valtype, regcache, readbuf);
3189 return RETURN_VALUE_STRUCT_CONVENTION;
3191 return RETURN_VALUE_REGISTER_CONVENTION;
3195 is_float_or_hfa_type_recurse (struct type *t, struct type **etp)
3197 switch (TYPE_CODE (t))
3201 return TYPE_LENGTH (*etp) == TYPE_LENGTH (t);
3208 case TYPE_CODE_ARRAY:
3210 is_float_or_hfa_type_recurse (check_typedef (TYPE_TARGET_TYPE (t)),
3213 case TYPE_CODE_STRUCT:
3217 for (i = 0; i < TYPE_NFIELDS (t); i++)
3218 if (!is_float_or_hfa_type_recurse
3219 (check_typedef (TYPE_FIELD_TYPE (t, i)), etp))
3230 /* Determine if the given type is one of the floating point types or
3231 and HFA (which is a struct, array, or combination thereof whose
3232 bottom-most elements are all of the same floating point type). */
3234 static struct type *
3235 is_float_or_hfa_type (struct type *t)
3237 struct type *et = 0;
3239 return is_float_or_hfa_type_recurse (t, &et) ? et : 0;
3243 /* Return 1 if the alignment of T is such that the next even slot
3244 should be used. Return 0, if the next available slot should
3245 be used. (See section 8.5.1 of the IA-64 Software Conventions
3246 and Runtime manual). */
3249 slot_alignment_is_next_even (struct type *t)
3251 switch (TYPE_CODE (t))
3255 if (TYPE_LENGTH (t) > 8)
3259 case TYPE_CODE_ARRAY:
3261 slot_alignment_is_next_even (check_typedef (TYPE_TARGET_TYPE (t)));
3262 case TYPE_CODE_STRUCT:
3266 for (i = 0; i < TYPE_NFIELDS (t); i++)
3267 if (slot_alignment_is_next_even
3268 (check_typedef (TYPE_FIELD_TYPE (t, i))))
3277 /* Attempt to find (and return) the global pointer for the given
3280 This is a rather nasty bit of code searchs for the .dynamic section
3281 in the objfile corresponding to the pc of the function we're trying
3282 to call. Once it finds the addresses at which the .dynamic section
3283 lives in the child process, it scans the Elf64_Dyn entries for a
3284 DT_PLTGOT tag. If it finds one of these, the corresponding
3285 d_un.d_ptr value is the global pointer. */
3288 ia64_find_global_pointer (struct gdbarch *gdbarch, CORE_ADDR faddr)
3290 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3291 struct obj_section *faddr_sect;
3293 faddr_sect = find_pc_section (faddr);
3294 if (faddr_sect != NULL)
3296 struct obj_section *osect;
3298 ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
3300 if (strcmp (osect->the_bfd_section->name, ".dynamic") == 0)
3304 if (osect < faddr_sect->objfile->sections_end)
3306 CORE_ADDR addr, endaddr;
3308 addr = obj_section_addr (osect);
3309 endaddr = obj_section_endaddr (osect);
3311 while (addr < endaddr)
3317 status = target_read_memory (addr, buf, sizeof (buf));
3320 tag = extract_signed_integer (buf, sizeof (buf), byte_order);
3322 if (tag == DT_PLTGOT)
3324 CORE_ADDR global_pointer;
3326 status = target_read_memory (addr + 8, buf, sizeof (buf));
3329 global_pointer = extract_unsigned_integer (buf, sizeof (buf),
3333 return global_pointer;
3346 /* Given a function's address, attempt to find (and return) the
3347 corresponding (canonical) function descriptor. Return 0 if
3350 find_extant_func_descr (struct gdbarch *gdbarch, CORE_ADDR faddr)
3352 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3353 struct obj_section *faddr_sect;
3355 /* Return early if faddr is already a function descriptor. */
3356 faddr_sect = find_pc_section (faddr);
3357 if (faddr_sect && strcmp (faddr_sect->the_bfd_section->name, ".opd") == 0)
3360 if (faddr_sect != NULL)
3362 struct obj_section *osect;
3363 ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
3365 if (strcmp (osect->the_bfd_section->name, ".opd") == 0)
3369 if (osect < faddr_sect->objfile->sections_end)
3371 CORE_ADDR addr, endaddr;
3373 addr = obj_section_addr (osect);
3374 endaddr = obj_section_endaddr (osect);
3376 while (addr < endaddr)
3382 status = target_read_memory (addr, buf, sizeof (buf));
3385 faddr2 = extract_signed_integer (buf, sizeof (buf), byte_order);
3387 if (faddr == faddr2)
3397 /* Attempt to find a function descriptor corresponding to the
3398 given address. If none is found, construct one on the
3399 stack using the address at fdaptr. */
3402 find_func_descr (struct regcache *regcache, CORE_ADDR faddr, CORE_ADDR *fdaptr)
3404 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3405 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3408 fdesc = find_extant_func_descr (gdbarch, faddr);
3412 ULONGEST global_pointer;
3418 global_pointer = ia64_find_global_pointer (gdbarch, faddr);
3420 if (global_pointer == 0)
3421 regcache_cooked_read_unsigned (regcache,
3422 IA64_GR1_REGNUM, &global_pointer);
3424 store_unsigned_integer (buf, 8, byte_order, faddr);
3425 store_unsigned_integer (buf + 8, 8, byte_order, global_pointer);
3427 write_memory (fdesc, buf, 16);
3433 /* Use the following routine when printing out function pointers
3434 so the user can see the function address rather than just the
3435 function descriptor. */
3437 ia64_convert_from_func_ptr_addr (struct gdbarch *gdbarch, CORE_ADDR addr,
3438 struct target_ops *targ)
3440 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3441 struct obj_section *s;
3443 s = find_pc_section (addr);
3445 /* check if ADDR points to a function descriptor. */
3446 if (s && strcmp (s->the_bfd_section->name, ".opd") == 0)
3447 return read_memory_unsigned_integer (addr, 8, byte_order);
3449 /* Normally, functions live inside a section that is executable.
3450 So, if ADDR points to a non-executable section, then treat it
3451 as a function descriptor and return the target address iff
3452 the target address itself points to a section that is executable. */
3453 if (s && (s->the_bfd_section->flags & SEC_CODE) == 0)
3455 CORE_ADDR pc = read_memory_unsigned_integer (addr, 8, byte_order);
3456 struct obj_section *pc_section = find_pc_section (pc);
3458 if (pc_section && (pc_section->the_bfd_section->flags & SEC_CODE))
3462 /* There are also descriptors embedded in vtables. */
3465 struct minimal_symbol *minsym;
3467 minsym = lookup_minimal_symbol_by_pc (addr);
3469 if (minsym && is_vtable_name (SYMBOL_LINKAGE_NAME (minsym)))
3470 return read_memory_unsigned_integer (addr, 8, byte_order);
3477 ia64_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp)
3483 ia64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
3484 struct regcache *regcache, CORE_ADDR bp_addr,
3485 int nargs, struct value **args, CORE_ADDR sp,
3486 int struct_return, CORE_ADDR struct_addr)
3488 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3493 int nslots, rseslots, memslots, slotnum, nfuncargs;
3495 ULONGEST bsp, cfm, pfs, new_bsp;
3496 CORE_ADDR funcdescaddr, pc, global_pointer;
3497 CORE_ADDR func_addr = find_function_addr (function, NULL);
3501 /* Count the number of slots needed for the arguments. */
3502 for (argno = 0; argno < nargs; argno++)
3505 type = check_typedef (value_type (arg));
3506 len = TYPE_LENGTH (type);
3508 if ((nslots & 1) && slot_alignment_is_next_even (type))
3511 if (TYPE_CODE (type) == TYPE_CODE_FUNC)
3514 nslots += (len + 7) / 8;
3517 /* Divvy up the slots between the RSE and the memory stack. */
3518 rseslots = (nslots > 8) ? 8 : nslots;
3519 memslots = nslots - rseslots;
3521 /* Allocate a new RSE frame. */
3522 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
3524 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
3525 new_bsp = rse_address_add (bsp, rseslots);
3526 regcache_cooked_write_unsigned (regcache, IA64_BSP_REGNUM, new_bsp);
3528 regcache_cooked_read_unsigned (regcache, IA64_PFS_REGNUM, &pfs);
3529 pfs &= 0xc000000000000000LL;
3530 pfs |= (cfm & 0xffffffffffffLL);
3531 regcache_cooked_write_unsigned (regcache, IA64_PFS_REGNUM, pfs);
3533 cfm &= 0xc000000000000000LL;
3535 regcache_cooked_write_unsigned (regcache, IA64_CFM_REGNUM, cfm);
3537 /* We will attempt to find function descriptors in the .opd segment,
3538 but if we can't we'll construct them ourselves. That being the
3539 case, we'll need to reserve space on the stack for them. */
3540 funcdescaddr = sp - nfuncargs * 16;
3541 funcdescaddr &= ~0xfLL;
3543 /* Adjust the stack pointer to it's new value. The calling conventions
3544 require us to have 16 bytes of scratch, plus whatever space is
3545 necessary for the memory slots and our function descriptors. */
3546 sp = sp - 16 - (memslots + nfuncargs) * 8;
3547 sp &= ~0xfLL; /* Maintain 16 byte alignment. */
3549 /* Place the arguments where they belong. The arguments will be
3550 either placed in the RSE backing store or on the memory stack.
3551 In addition, floating point arguments or HFAs are placed in
3552 floating point registers. */
3554 floatreg = IA64_FR8_REGNUM;
3555 for (argno = 0; argno < nargs; argno++)
3557 struct type *float_elt_type;
3560 type = check_typedef (value_type (arg));
3561 len = TYPE_LENGTH (type);
3563 /* Special handling for function parameters. */
3565 && TYPE_CODE (type) == TYPE_CODE_PTR
3566 && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC)
3569 ULONGEST faddr = extract_unsigned_integer (value_contents (arg),
3571 store_unsigned_integer (val_buf, 8, byte_order,
3572 find_func_descr (regcache, faddr,
3574 if (slotnum < rseslots)
3575 write_memory (rse_address_add (bsp, slotnum), val_buf, 8);
3577 write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8);
3584 /* Skip odd slot if necessary... */
3585 if ((slotnum & 1) && slot_alignment_is_next_even (type))
3593 memset (val_buf, 0, 8);
3594 memcpy (val_buf, value_contents (arg) + argoffset, (len > 8) ? 8 : len);
3596 if (slotnum < rseslots)
3597 write_memory (rse_address_add (bsp, slotnum), val_buf, 8);
3599 write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8);
3606 /* Handle floating point types (including HFAs). */
3607 float_elt_type = is_float_or_hfa_type (type);
3608 if (float_elt_type != NULL)
3611 len = TYPE_LENGTH (type);
3612 while (len > 0 && floatreg < IA64_FR16_REGNUM)
3614 char to[MAX_REGISTER_SIZE];
3615 convert_typed_floating (value_contents (arg) + argoffset, float_elt_type,
3616 to, ia64_ext_type (gdbarch));
3617 regcache_cooked_write (regcache, floatreg, (void *)to);
3619 argoffset += TYPE_LENGTH (float_elt_type);
3620 len -= TYPE_LENGTH (float_elt_type);
3625 /* Store the struct return value in r8 if necessary. */
3628 regcache_cooked_write_unsigned (regcache, IA64_GR8_REGNUM, (ULONGEST)struct_addr);
3631 global_pointer = ia64_find_global_pointer (gdbarch, func_addr);
3633 if (global_pointer != 0)
3634 regcache_cooked_write_unsigned (regcache, IA64_GR1_REGNUM, global_pointer);
3636 regcache_cooked_write_unsigned (regcache, IA64_BR0_REGNUM, bp_addr);
3638 regcache_cooked_write_unsigned (regcache, sp_regnum, sp);
3643 static struct frame_id
3644 ia64_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
3646 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3650 get_frame_register (this_frame, sp_regnum, buf);
3651 sp = extract_unsigned_integer (buf, 8, byte_order);
3653 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
3654 bsp = extract_unsigned_integer (buf, 8, byte_order);
3656 if (gdbarch_debug >= 1)
3657 fprintf_unfiltered (gdb_stdlog,
3658 "dummy frame id: code %s, stack %s, special %s\n",
3659 paddress (gdbarch, get_frame_pc (this_frame)),
3660 paddress (gdbarch, sp), paddress (gdbarch, bsp));
3662 return frame_id_build_special (sp, get_frame_pc (this_frame), bsp);
3666 ia64_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
3668 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3670 CORE_ADDR ip, psr, pc;
3672 frame_unwind_register (next_frame, IA64_IP_REGNUM, buf);
3673 ip = extract_unsigned_integer (buf, 8, byte_order);
3674 frame_unwind_register (next_frame, IA64_PSR_REGNUM, buf);
3675 psr = extract_unsigned_integer (buf, 8, byte_order);
3677 pc = (ip & ~0xf) | ((psr >> 41) & 3);
3682 ia64_print_insn (bfd_vma memaddr, struct disassemble_info *info)
3684 info->bytes_per_line = SLOT_MULTIPLIER;
3685 return print_insn_ia64 (memaddr, info);
3688 static struct gdbarch *
3689 ia64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
3691 struct gdbarch *gdbarch;
3692 struct gdbarch_tdep *tdep;
3694 /* If there is already a candidate, use it. */
3695 arches = gdbarch_list_lookup_by_info (arches, &info);
3697 return arches->gdbarch;
3699 tdep = xzalloc (sizeof (struct gdbarch_tdep));
3700 gdbarch = gdbarch_alloc (&info, tdep);
3702 /* According to the ia64 specs, instructions that store long double
3703 floats in memory use a long-double format different than that
3704 used in the floating registers. The memory format matches the
3705 x86 extended float format which is 80 bits. An OS may choose to
3706 use this format (e.g. GNU/Linux) or choose to use a different
3707 format for storing long doubles (e.g. HPUX). In the latter case,
3708 the setting of the format may be moved/overridden in an
3709 OS-specific tdep file. */
3710 set_gdbarch_long_double_format (gdbarch, floatformats_i387_ext);
3712 set_gdbarch_short_bit (gdbarch, 16);
3713 set_gdbarch_int_bit (gdbarch, 32);
3714 set_gdbarch_long_bit (gdbarch, 64);
3715 set_gdbarch_long_long_bit (gdbarch, 64);
3716 set_gdbarch_float_bit (gdbarch, 32);
3717 set_gdbarch_double_bit (gdbarch, 64);
3718 set_gdbarch_long_double_bit (gdbarch, 128);
3719 set_gdbarch_ptr_bit (gdbarch, 64);
3721 set_gdbarch_num_regs (gdbarch, NUM_IA64_RAW_REGS);
3722 set_gdbarch_num_pseudo_regs (gdbarch, LAST_PSEUDO_REGNUM - FIRST_PSEUDO_REGNUM);
3723 set_gdbarch_sp_regnum (gdbarch, sp_regnum);
3724 set_gdbarch_fp0_regnum (gdbarch, IA64_FR0_REGNUM);
3726 set_gdbarch_register_name (gdbarch, ia64_register_name);
3727 set_gdbarch_register_type (gdbarch, ia64_register_type);
3729 set_gdbarch_pseudo_register_read (gdbarch, ia64_pseudo_register_read);
3730 set_gdbarch_pseudo_register_write (gdbarch, ia64_pseudo_register_write);
3731 set_gdbarch_dwarf2_reg_to_regnum (gdbarch, ia64_dwarf_reg_to_regnum);
3732 set_gdbarch_register_reggroup_p (gdbarch, ia64_register_reggroup_p);
3733 set_gdbarch_convert_register_p (gdbarch, ia64_convert_register_p);
3734 set_gdbarch_register_to_value (gdbarch, ia64_register_to_value);
3735 set_gdbarch_value_to_register (gdbarch, ia64_value_to_register);
3737 set_gdbarch_skip_prologue (gdbarch, ia64_skip_prologue);
3739 set_gdbarch_return_value (gdbarch, ia64_return_value);
3741 set_gdbarch_memory_insert_breakpoint (gdbarch, ia64_memory_insert_breakpoint);
3742 set_gdbarch_memory_remove_breakpoint (gdbarch, ia64_memory_remove_breakpoint);
3743 set_gdbarch_breakpoint_from_pc (gdbarch, ia64_breakpoint_from_pc);
3744 set_gdbarch_read_pc (gdbarch, ia64_read_pc);
3745 set_gdbarch_write_pc (gdbarch, ia64_write_pc);
3747 /* Settings for calling functions in the inferior. */
3748 set_gdbarch_push_dummy_call (gdbarch, ia64_push_dummy_call);
3749 set_gdbarch_frame_align (gdbarch, ia64_frame_align);
3750 set_gdbarch_dummy_id (gdbarch, ia64_dummy_id);
3752 set_gdbarch_unwind_pc (gdbarch, ia64_unwind_pc);
3753 #ifdef HAVE_LIBUNWIND_IA64_H
3754 frame_unwind_append_unwinder (gdbarch,
3755 &ia64_libunwind_sigtramp_frame_unwind);
3756 frame_unwind_append_unwinder (gdbarch, &ia64_libunwind_frame_unwind);
3757 frame_unwind_append_unwinder (gdbarch, &ia64_sigtramp_frame_unwind);
3758 libunwind_frame_set_descr (gdbarch, &ia64_libunwind_descr);
3760 frame_unwind_append_unwinder (gdbarch, &ia64_sigtramp_frame_unwind);
3762 frame_unwind_append_unwinder (gdbarch, &ia64_frame_unwind);
3763 frame_base_set_default (gdbarch, &ia64_frame_base);
3765 /* Settings that should be unnecessary. */
3766 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
3768 set_gdbarch_print_insn (gdbarch, ia64_print_insn);
3769 set_gdbarch_convert_from_func_ptr_addr (gdbarch, ia64_convert_from_func_ptr_addr);
3771 /* The virtual table contains 16-byte descriptors, not pointers to
3773 set_gdbarch_vtable_function_descriptors (gdbarch, 1);
3775 /* Hook in ABI-specific overrides, if they have been registered. */
3776 gdbarch_init_osabi (info, gdbarch);
3781 extern initialize_file_ftype _initialize_ia64_tdep; /* -Wmissing-prototypes */
3784 _initialize_ia64_tdep (void)
3786 gdbarch_register (bfd_arch_ia64, ia64_gdbarch_init, NULL);