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 There is one special case where we need to be extra careful:
590 L-X instructions, which are instructions that occupy 2 slots
591 (The L part is always in slot 1, and the X part is always in
592 slot 2). We must refuse to insert breakpoints for an address
593 that points at slot 2 of a bundle where an L-X instruction is
594 present, since there is logically no instruction at that address.
595 However, to make things more interesting, the opcode of L-X
596 instructions is located in slot 2. This means that, to insert
597 a breakpoint at an address that points to slot 1, we actually
598 need to write the breakpoint in slot 2! Slot 1 is actually
599 the extended operand, so writing the breakpoint there would not
600 have the desired effect. Another side-effect of this issue
601 is that we need to make sure that the shadow contents buffer
602 does save byte 15 of our instruction bundle (this is the tail
603 end of slot 2, which wouldn't be saved if we were to insert
604 the breakpoint in slot 1).
606 ia64 16-byte bundle layout:
607 | 5 bits | slot 0 with 41 bits | slot 1 with 41 bits | slot 2 with 41 bits |
609 The current addressing used by the code below:
610 original PC placed_address placed_size required covered
611 == bp_tgt->shadow_len reqd \subset covered
612 0xABCDE0 0xABCDE0 0x10 <0x0...0x5> <0x0..0xF>
613 0xABCDE1 0xABCDE1 0xF <0x5...0xA> <0x1..0xF>
614 0xABCDE2 0xABCDE2 0xE <0xA...0xF> <0x2..0xF>
616 L-X instructions are treated a little specially, as explained above:
617 0xABCDE1 0xABCDE1 0xF <0xA...0xF> <0x1..0xF>
619 `objdump -d' and some other tools show a bit unjustified offsets:
620 original PC byte where starts the instruction objdump offset
621 0xABCDE0 0xABCDE0 0xABCDE0
622 0xABCDE1 0xABCDE5 0xABCDE6
623 0xABCDE2 0xABCDEA 0xABCDEC
626 #define IA64_BREAKPOINT 0x00003333300LL
629 ia64_memory_insert_breakpoint (struct gdbarch *gdbarch,
630 struct bp_target_info *bp_tgt)
632 CORE_ADDR addr = bp_tgt->placed_address;
633 gdb_byte bundle[BUNDLE_LEN];
634 int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER, shadow_slotnum;
635 long long instr_breakpoint;
638 struct cleanup *cleanup;
641 error (_("Can't insert breakpoint for slot numbers greater than 2."));
645 /* Enable the automatic memory restoration from breakpoints while
646 we read our instruction bundle for the purpose of SHADOW_CONTENTS.
647 Otherwise, we could possibly store into the shadow parts of the adjacent
648 placed breakpoints. It is due to our SHADOW_CONTENTS overlapping the real
649 breakpoint instruction bits region. */
650 cleanup = make_show_memory_breakpoints_cleanup (0);
651 val = target_read_memory (addr, bundle, BUNDLE_LEN);
654 do_cleanups (cleanup);
658 /* SHADOW_SLOTNUM saves the original slot number as expected by the caller
659 for addressing the SHADOW_CONTENTS placement. */
660 shadow_slotnum = slotnum;
662 /* Always cover the last byte of the bundle in case we are inserting
663 a breakpoint on an L-X instruction. */
664 bp_tgt->shadow_len = BUNDLE_LEN - shadow_slotnum;
666 template = extract_bit_field (bundle, 0, 5);
667 if (template_encoding_table[template][slotnum] == X)
669 /* X unit types can only be used in slot 2, and are actually
670 part of a 2-slot L-X instruction. We cannot break at this
671 address, as this is the second half of an instruction that
672 lives in slot 1 of that bundle. */
673 gdb_assert (slotnum == 2);
674 error (_("Can't insert breakpoint for non-existing slot X"));
676 if (template_encoding_table[template][slotnum] == L)
678 /* L unit types can only be used in slot 1. But the associated
679 opcode for that instruction is in slot 2, so bump the slot number
681 gdb_assert (slotnum == 1);
685 /* Store the whole bundle, except for the initial skipped bytes by the slot
686 number interpreted as bytes offset in PLACED_ADDRESS. */
687 memcpy (bp_tgt->shadow_contents, bundle + shadow_slotnum, bp_tgt->shadow_len);
689 /* Re-read the same bundle as above except that, this time, read it in order
690 to compute the new bundle inside which we will be inserting the
691 breakpoint. Therefore, disable the automatic memory restoration from
692 breakpoints while we read our instruction bundle. Otherwise, the general
693 restoration mechanism kicks in and we would possibly remove parts of the
694 adjacent placed breakpoints. It is due to our SHADOW_CONTENTS overlapping
695 the real breakpoint instruction bits region. */
696 make_show_memory_breakpoints_cleanup (1);
697 val = target_read_memory (addr, bundle, BUNDLE_LEN);
700 do_cleanups (cleanup);
704 /* Breakpoints already present in the code will get deteacted and not get
705 reinserted by bp_loc_is_permanent. Multiple breakpoints at the same
706 location cannot induce the internal error as they are optimized into
707 a single instance by update_global_location_list. */
708 instr_breakpoint = slotN_contents (bundle, slotnum);
709 if (instr_breakpoint == IA64_BREAKPOINT)
710 internal_error (__FILE__, __LINE__,
711 _("Address %s already contains a breakpoint."),
712 paddress (gdbarch, bp_tgt->placed_address));
713 replace_slotN_contents (bundle, IA64_BREAKPOINT, slotnum);
715 bp_tgt->placed_size = bp_tgt->shadow_len;
717 val = target_write_memory (addr + shadow_slotnum, bundle + shadow_slotnum,
720 do_cleanups (cleanup);
725 ia64_memory_remove_breakpoint (struct gdbarch *gdbarch,
726 struct bp_target_info *bp_tgt)
728 CORE_ADDR addr = bp_tgt->placed_address;
729 gdb_byte bundle_mem[BUNDLE_LEN], bundle_saved[BUNDLE_LEN];
730 int slotnum = (addr & 0x0f) / SLOT_MULTIPLIER, shadow_slotnum;
731 long long instr_breakpoint, instr_saved;
734 struct cleanup *cleanup;
738 /* Disable the automatic memory restoration from breakpoints while
739 we read our instruction bundle. Otherwise, the general restoration
740 mechanism kicks in and we would possibly remove parts of the adjacent
741 placed breakpoints. It is due to our SHADOW_CONTENTS overlapping the real
742 breakpoint instruction bits region. */
743 cleanup = make_show_memory_breakpoints_cleanup (1);
744 val = target_read_memory (addr, bundle_mem, BUNDLE_LEN);
747 do_cleanups (cleanup);
751 /* SHADOW_SLOTNUM saves the original slot number as expected by the caller
752 for addressing the SHADOW_CONTENTS placement. */
753 shadow_slotnum = slotnum;
755 template = extract_bit_field (bundle_mem, 0, 5);
756 if (template_encoding_table[template][slotnum] == X)
758 /* X unit types can only be used in slot 2, and are actually
759 part of a 2-slot L-X instruction. We refuse to insert
760 breakpoints at this address, so there should be no reason
761 for us attempting to remove one there, except if the program's
762 code somehow got modified in memory. */
763 gdb_assert (slotnum == 2);
764 warning (_("Cannot remove breakpoint at address %s from non-existing "
765 "X-type slot, memory has changed underneath"),
766 paddress (gdbarch, bp_tgt->placed_address));
767 do_cleanups (cleanup);
770 if (template_encoding_table[template][slotnum] == L)
772 /* L unit types can only be used in slot 1. But the breakpoint
773 was actually saved using slot 2, so update the slot number
775 gdb_assert (slotnum == 1);
779 gdb_assert (bp_tgt->placed_size == BUNDLE_LEN - shadow_slotnum);
780 gdb_assert (bp_tgt->placed_size == bp_tgt->shadow_len);
782 instr_breakpoint = slotN_contents (bundle_mem, slotnum);
783 if (instr_breakpoint != IA64_BREAKPOINT)
785 warning (_("Cannot remove breakpoint at address %s, "
786 "no break instruction at such address."),
787 paddress (gdbarch, bp_tgt->placed_address));
788 do_cleanups (cleanup);
792 /* Extract the original saved instruction from SLOTNUM normalizing its
793 bit-shift for INSTR_SAVED. */
794 memcpy (bundle_saved, bundle_mem, BUNDLE_LEN);
795 memcpy (bundle_saved + shadow_slotnum, bp_tgt->shadow_contents,
797 instr_saved = slotN_contents (bundle_saved, slotnum);
799 /* In BUNDLE_MEM, be careful to modify only the bits belonging to SLOTNUM
800 and not any of the other ones that are stored in SHADOW_CONTENTS. */
801 replace_slotN_contents (bundle_mem, instr_saved, slotnum);
802 val = target_write_memory (addr, bundle_mem, BUNDLE_LEN);
804 do_cleanups (cleanup);
808 /* As gdbarch_breakpoint_from_pc ranges have byte granularity and ia64
809 instruction slots ranges are bit-granular (41 bits) we have to provide an
810 extended range as described for ia64_memory_insert_breakpoint. We also take
811 care of preserving the `break' instruction 21-bit (or 62-bit) parameter to
812 make a match for permanent breakpoints. */
814 static const gdb_byte *
815 ia64_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr, int *lenptr)
817 CORE_ADDR addr = *pcptr;
818 static gdb_byte bundle[BUNDLE_LEN];
819 int slotnum = (int) (*pcptr & 0x0f) / SLOT_MULTIPLIER, shadow_slotnum;
820 long long instr_fetched;
823 struct cleanup *cleanup;
826 error (_("Can't insert breakpoint for slot numbers greater than 2."));
830 /* Enable the automatic memory restoration from breakpoints while
831 we read our instruction bundle to match bp_loc_is_permanent. */
832 cleanup = make_show_memory_breakpoints_cleanup (0);
833 val = target_read_memory (addr, bundle, BUNDLE_LEN);
834 do_cleanups (cleanup);
836 /* The memory might be unreachable. This can happen, for instance,
837 when the user inserts a breakpoint at an invalid address. */
841 /* SHADOW_SLOTNUM saves the original slot number as expected by the caller
842 for addressing the SHADOW_CONTENTS placement. */
843 shadow_slotnum = slotnum;
845 /* Cover always the last byte of the bundle for the L-X slot case. */
846 *lenptr = BUNDLE_LEN - shadow_slotnum;
848 /* Check for L type instruction in slot 1, if present then bump up the slot
849 number to the slot 2. */
850 template = extract_bit_field (bundle, 0, 5);
851 if (template_encoding_table[template][slotnum] == X)
853 gdb_assert (slotnum == 2);
854 error (_("Can't insert breakpoint for non-existing slot X"));
856 if (template_encoding_table[template][slotnum] == L)
858 gdb_assert (slotnum == 1);
862 /* A break instruction has its all its opcode bits cleared except for
863 the parameter value. For L+X slot pair we are at the X slot (slot 2) so
864 we should not touch the L slot - the upper 41 bits of the parameter. */
865 instr_fetched = slotN_contents (bundle, slotnum);
866 instr_fetched &= 0x1003ffffc0LL;
867 replace_slotN_contents (bundle, instr_fetched, slotnum);
869 return bundle + shadow_slotnum;
873 ia64_read_pc (struct regcache *regcache)
875 ULONGEST psr_value, pc_value;
878 regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr_value);
879 regcache_cooked_read_unsigned (regcache, IA64_IP_REGNUM, &pc_value);
880 slot_num = (psr_value >> 41) & 3;
882 return pc_value | (slot_num * SLOT_MULTIPLIER);
886 ia64_write_pc (struct regcache *regcache, CORE_ADDR new_pc)
888 int slot_num = (int) (new_pc & 0xf) / SLOT_MULTIPLIER;
891 regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr_value);
892 psr_value &= ~(3LL << 41);
893 psr_value |= (ULONGEST)(slot_num & 0x3) << 41;
897 regcache_cooked_write_unsigned (regcache, IA64_PSR_REGNUM, psr_value);
898 regcache_cooked_write_unsigned (regcache, IA64_IP_REGNUM, new_pc);
901 #define IS_NaT_COLLECTION_ADDR(addr) ((((addr) >> 3) & 0x3f) == 0x3f)
903 /* Returns the address of the slot that's NSLOTS slots away from
904 the address ADDR. NSLOTS may be positive or negative. */
906 rse_address_add(CORE_ADDR addr, int nslots)
909 int mandatory_nat_slots = nslots / 63;
910 int direction = nslots < 0 ? -1 : 1;
912 new_addr = addr + 8 * (nslots + mandatory_nat_slots);
914 if ((new_addr >> 9) != ((addr + 8 * 64 * mandatory_nat_slots) >> 9))
915 new_addr += 8 * direction;
917 if (IS_NaT_COLLECTION_ADDR(new_addr))
918 new_addr += 8 * direction;
924 ia64_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
925 int regnum, gdb_byte *buf)
927 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
929 if (regnum >= V32_REGNUM && regnum <= V127_REGNUM)
931 #ifdef HAVE_LIBUNWIND_IA64_H
932 /* First try and use the libunwind special reg accessor, otherwise fallback to
934 if (!libunwind_is_initialized ()
935 || libunwind_get_reg_special (gdbarch, regcache, regnum, buf) != 0)
938 /* The fallback position is to assume that r32-r127 are found sequentially
939 in memory starting at $bof. This isn't always true, but without libunwind,
940 this is the best we can do. */
944 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
945 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
947 /* The bsp points at the end of the register frame so we
948 subtract the size of frame from it to get start of register frame. */
949 bsp = rse_address_add (bsp, -(cfm & 0x7f));
951 if ((cfm & 0x7f) > regnum - V32_REGNUM)
953 ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
954 reg = read_memory_integer ((CORE_ADDR)reg_addr, 8, byte_order);
955 store_unsigned_integer (buf, register_size (gdbarch, regnum),
959 store_unsigned_integer (buf, register_size (gdbarch, regnum),
963 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
967 regcache_cooked_read_unsigned (regcache, IA64_UNAT_REGNUM, &unat);
968 unatN_val = (unat & (1LL << (regnum - IA64_NAT0_REGNUM))) != 0;
969 store_unsigned_integer (buf, register_size (gdbarch, regnum),
970 byte_order, unatN_val);
972 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
974 ULONGEST natN_val = 0;
977 CORE_ADDR gr_addr = 0;
978 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
979 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
981 /* The bsp points at the end of the register frame so we
982 subtract the size of frame from it to get start of register frame. */
983 bsp = rse_address_add (bsp, -(cfm & 0x7f));
985 if ((cfm & 0x7f) > regnum - V32_REGNUM)
986 gr_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
990 /* Compute address of nat collection bits. */
991 CORE_ADDR nat_addr = gr_addr | 0x1f8;
992 CORE_ADDR nat_collection;
994 /* If our nat collection address is bigger than bsp, we have to get
995 the nat collection from rnat. Otherwise, we fetch the nat
996 collection from the computed address. */
998 regcache_cooked_read_unsigned (regcache, IA64_RNAT_REGNUM, &nat_collection);
1000 nat_collection = read_memory_integer (nat_addr, 8, byte_order);
1001 nat_bit = (gr_addr >> 3) & 0x3f;
1002 natN_val = (nat_collection >> nat_bit) & 1;
1005 store_unsigned_integer (buf, register_size (gdbarch, regnum),
1006 byte_order, natN_val);
1008 else if (regnum == VBOF_REGNUM)
1010 /* A virtual register frame start is provided for user convenience.
1011 It can be calculated as the bsp - sof (sizeof frame). */
1015 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
1016 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1018 /* The bsp points at the end of the register frame so we
1019 subtract the size of frame from it to get beginning of frame. */
1020 vbsp = rse_address_add (bsp, -(cfm & 0x7f));
1021 store_unsigned_integer (buf, register_size (gdbarch, regnum),
1024 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
1030 regcache_cooked_read_unsigned (regcache, IA64_PR_REGNUM, &pr);
1031 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1033 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
1035 /* Fetch predicate register rename base from current frame
1036 marker for this frame. */
1037 int rrb_pr = (cfm >> 32) & 0x3f;
1039 /* Adjust the register number to account for register rotation. */
1040 regnum = VP16_REGNUM
1041 + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
1043 prN_val = (pr & (1LL << (regnum - VP0_REGNUM))) != 0;
1044 store_unsigned_integer (buf, register_size (gdbarch, regnum),
1045 byte_order, prN_val);
1048 memset (buf, 0, register_size (gdbarch, regnum));
1052 ia64_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
1053 int regnum, const gdb_byte *buf)
1055 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1057 if (regnum >= V32_REGNUM && regnum <= V127_REGNUM)
1062 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
1063 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1065 bsp = rse_address_add (bsp, -(cfm & 0x7f));
1067 if ((cfm & 0x7f) > regnum - V32_REGNUM)
1069 ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
1070 write_memory (reg_addr, (void *)buf, 8);
1073 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
1075 ULONGEST unatN_val, unat, unatN_mask;
1076 regcache_cooked_read_unsigned (regcache, IA64_UNAT_REGNUM, &unat);
1077 unatN_val = extract_unsigned_integer (buf, register_size (gdbarch, regnum),
1079 unatN_mask = (1LL << (regnum - IA64_NAT0_REGNUM));
1081 unat &= ~unatN_mask;
1082 else if (unatN_val == 1)
1084 regcache_cooked_write_unsigned (regcache, IA64_UNAT_REGNUM, unat);
1086 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
1091 CORE_ADDR gr_addr = 0;
1092 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
1093 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1095 /* The bsp points at the end of the register frame so we
1096 subtract the size of frame from it to get start of register frame. */
1097 bsp = rse_address_add (bsp, -(cfm & 0x7f));
1099 if ((cfm & 0x7f) > regnum - V32_REGNUM)
1100 gr_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
1102 natN_val = extract_unsigned_integer (buf, register_size (gdbarch, regnum),
1105 if (gr_addr != 0 && (natN_val == 0 || natN_val == 1))
1107 /* Compute address of nat collection bits. */
1108 CORE_ADDR nat_addr = gr_addr | 0x1f8;
1109 CORE_ADDR nat_collection;
1110 int natN_bit = (gr_addr >> 3) & 0x3f;
1111 ULONGEST natN_mask = (1LL << natN_bit);
1112 /* If our nat collection address is bigger than bsp, we have to get
1113 the nat collection from rnat. Otherwise, we fetch the nat
1114 collection from the computed address. */
1115 if (nat_addr >= bsp)
1117 regcache_cooked_read_unsigned (regcache, IA64_RNAT_REGNUM, &nat_collection);
1119 nat_collection |= natN_mask;
1121 nat_collection &= ~natN_mask;
1122 regcache_cooked_write_unsigned (regcache, IA64_RNAT_REGNUM, nat_collection);
1127 nat_collection = read_memory_integer (nat_addr, 8, byte_order);
1129 nat_collection |= natN_mask;
1131 nat_collection &= ~natN_mask;
1132 store_unsigned_integer (nat_buf, register_size (gdbarch, regnum),
1133 byte_order, nat_collection);
1134 write_memory (nat_addr, nat_buf, 8);
1138 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
1145 regcache_cooked_read_unsigned (regcache, IA64_PR_REGNUM, &pr);
1146 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1148 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
1150 /* Fetch predicate register rename base from current frame
1151 marker for this frame. */
1152 int rrb_pr = (cfm >> 32) & 0x3f;
1154 /* Adjust the register number to account for register rotation. */
1155 regnum = VP16_REGNUM
1156 + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
1158 prN_val = extract_unsigned_integer (buf, register_size (gdbarch, regnum),
1160 prN_mask = (1LL << (regnum - VP0_REGNUM));
1163 else if (prN_val == 1)
1165 regcache_cooked_write_unsigned (regcache, IA64_PR_REGNUM, pr);
1169 /* The ia64 needs to convert between various ieee floating-point formats
1170 and the special ia64 floating point register format. */
1173 ia64_convert_register_p (struct gdbarch *gdbarch, int regno, struct type *type)
1175 return (regno >= IA64_FR0_REGNUM && regno <= IA64_FR127_REGNUM
1176 && type != ia64_ext_type (gdbarch));
1180 ia64_register_to_value (struct frame_info *frame, int regnum,
1181 struct type *valtype, gdb_byte *out)
1183 struct gdbarch *gdbarch = get_frame_arch (frame);
1184 char in[MAX_REGISTER_SIZE];
1185 frame_register_read (frame, regnum, in);
1186 convert_typed_floating (in, ia64_ext_type (gdbarch), out, valtype);
1190 ia64_value_to_register (struct frame_info *frame, int regnum,
1191 struct type *valtype, const gdb_byte *in)
1193 struct gdbarch *gdbarch = get_frame_arch (frame);
1194 char out[MAX_REGISTER_SIZE];
1195 convert_typed_floating (in, valtype, out, ia64_ext_type (gdbarch));
1196 put_frame_register (frame, regnum, out);
1200 /* Limit the number of skipped non-prologue instructions since examining
1201 of the prologue is expensive. */
1202 static int max_skip_non_prologue_insns = 40;
1204 /* Given PC representing the starting address of a function, and
1205 LIM_PC which is the (sloppy) limit to which to scan when looking
1206 for a prologue, attempt to further refine this limit by using
1207 the line data in the symbol table. If successful, a better guess
1208 on where the prologue ends is returned, otherwise the previous
1209 value of lim_pc is returned. TRUST_LIMIT is a pointer to a flag
1210 which will be set to indicate whether the returned limit may be
1211 used with no further scanning in the event that the function is
1214 /* FIXME: cagney/2004-02-14: This function and logic have largely been
1215 superseded by skip_prologue_using_sal. */
1218 refine_prologue_limit (CORE_ADDR pc, CORE_ADDR lim_pc, int *trust_limit)
1220 struct symtab_and_line prologue_sal;
1221 CORE_ADDR start_pc = pc;
1224 /* The prologue can not possibly go past the function end itself,
1225 so we can already adjust LIM_PC accordingly. */
1226 if (find_pc_partial_function (pc, NULL, NULL, &end_pc) && end_pc < lim_pc)
1229 /* Start off not trusting the limit. */
1232 prologue_sal = find_pc_line (pc, 0);
1233 if (prologue_sal.line != 0)
1236 CORE_ADDR addr = prologue_sal.end;
1238 /* Handle the case in which compiler's optimizer/scheduler
1239 has moved instructions into the prologue. We scan ahead
1240 in the function looking for address ranges whose corresponding
1241 line number is less than or equal to the first one that we
1242 found for the function. (It can be less than when the
1243 scheduler puts a body instruction before the first prologue
1245 for (i = 2 * max_skip_non_prologue_insns;
1246 i > 0 && (lim_pc == 0 || addr < lim_pc);
1249 struct symtab_and_line sal;
1251 sal = find_pc_line (addr, 0);
1254 if (sal.line <= prologue_sal.line
1255 && sal.symtab == prologue_sal.symtab)
1262 if (lim_pc == 0 || prologue_sal.end < lim_pc)
1264 lim_pc = prologue_sal.end;
1265 if (start_pc == get_pc_function_start (lim_pc))
1272 #define isScratch(_regnum_) ((_regnum_) == 2 || (_regnum_) == 3 \
1273 || (8 <= (_regnum_) && (_regnum_) <= 11) \
1274 || (14 <= (_regnum_) && (_regnum_) <= 31))
1275 #define imm9(_instr_) \
1276 ( ((((_instr_) & 0x01000000000LL) ? -1 : 0) << 8) \
1277 | (((_instr_) & 0x00008000000LL) >> 20) \
1278 | (((_instr_) & 0x00000001fc0LL) >> 6))
1280 /* Allocate and initialize a frame cache. */
1282 static struct ia64_frame_cache *
1283 ia64_alloc_frame_cache (void)
1285 struct ia64_frame_cache *cache;
1288 cache = FRAME_OBSTACK_ZALLOC (struct ia64_frame_cache);
1294 cache->prev_cfm = 0;
1300 cache->frameless = 1;
1302 for (i = 0; i < NUM_IA64_RAW_REGS; i++)
1303 cache->saved_regs[i] = 0;
1309 examine_prologue (CORE_ADDR pc, CORE_ADDR lim_pc,
1310 struct frame_info *this_frame,
1311 struct ia64_frame_cache *cache)
1314 CORE_ADDR last_prologue_pc = pc;
1315 instruction_type it;
1320 int unat_save_reg = 0;
1321 int pr_save_reg = 0;
1322 int mem_stack_frame_size = 0;
1324 CORE_ADDR spill_addr = 0;
1327 char reg_contents[256];
1333 CORE_ADDR bof, sor, sol, sof, cfm, rrb_gr;
1335 memset (instores, 0, sizeof instores);
1336 memset (infpstores, 0, sizeof infpstores);
1337 memset (reg_contents, 0, sizeof reg_contents);
1339 if (cache->after_prologue != 0
1340 && cache->after_prologue <= lim_pc)
1341 return cache->after_prologue;
1343 lim_pc = refine_prologue_limit (pc, lim_pc, &trust_limit);
1344 next_pc = fetch_instruction (pc, &it, &instr);
1346 /* We want to check if we have a recognizable function start before we
1347 look ahead for a prologue. */
1348 if (pc < lim_pc && next_pc
1349 && it == M && ((instr & 0x1ee0000003fLL) == 0x02c00000000LL))
1351 /* alloc - start of a regular function. */
1352 int sor = (int) ((instr & 0x00078000000LL) >> 27);
1353 int sol = (int) ((instr & 0x00007f00000LL) >> 20);
1354 int sof = (int) ((instr & 0x000000fe000LL) >> 13);
1355 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1357 /* Verify that the current cfm matches what we think is the
1358 function start. If we have somehow jumped within a function,
1359 we do not want to interpret the prologue and calculate the
1360 addresses of various registers such as the return address.
1361 We will instead treat the frame as frameless. */
1363 (sof == (cache->cfm & 0x7f) &&
1364 sol == ((cache->cfm >> 7) & 0x7f)))
1368 last_prologue_pc = next_pc;
1373 /* Look for a leaf routine. */
1374 if (pc < lim_pc && next_pc
1375 && (it == I || it == M)
1376 && ((instr & 0x1ee00000000LL) == 0x10800000000LL))
1378 /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */
1379 int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13)
1380 | ((instr & 0x001f8000000LL) >> 20)
1381 | ((instr & 0x000000fe000LL) >> 13));
1382 int rM = (int) ((instr & 0x00007f00000LL) >> 20);
1383 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1384 int qp = (int) (instr & 0x0000000003fLL);
1385 if (qp == 0 && rN == 2 && imm == 0 && rM == 12 && fp_reg == 0)
1387 /* mov r2, r12 - beginning of leaf routine */
1389 last_prologue_pc = next_pc;
1393 /* If we don't recognize a regular function or leaf routine, we are
1399 last_prologue_pc = lim_pc;
1403 /* Loop, looking for prologue instructions, keeping track of
1404 where preserved registers were spilled. */
1407 next_pc = fetch_instruction (pc, &it, &instr);
1411 if (it == B && ((instr & 0x1e1f800003fLL) != 0x04000000000LL))
1413 /* Exit loop upon hitting a non-nop branch instruction. */
1418 else if (((instr & 0x3fLL) != 0LL) &&
1419 (frameless || ret_reg != 0))
1421 /* Exit loop upon hitting a predicated instruction if
1422 we already have the return register or if we are frameless. */
1427 else if (it == I && ((instr & 0x1eff8000000LL) == 0x00188000000LL))
1430 int b2 = (int) ((instr & 0x0000000e000LL) >> 13);
1431 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1432 int qp = (int) (instr & 0x0000000003f);
1434 if (qp == 0 && b2 == 0 && rN >= 32 && ret_reg == 0)
1437 last_prologue_pc = next_pc;
1440 else if ((it == I || it == M)
1441 && ((instr & 0x1ee00000000LL) == 0x10800000000LL))
1443 /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */
1444 int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13)
1445 | ((instr & 0x001f8000000LL) >> 20)
1446 | ((instr & 0x000000fe000LL) >> 13));
1447 int rM = (int) ((instr & 0x00007f00000LL) >> 20);
1448 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1449 int qp = (int) (instr & 0x0000000003fLL);
1451 if (qp == 0 && rN >= 32 && imm == 0 && rM == 12 && fp_reg == 0)
1455 last_prologue_pc = next_pc;
1457 else if (qp == 0 && rN == 12 && rM == 12)
1459 /* adds r12, -mem_stack_frame_size, r12 */
1460 mem_stack_frame_size -= imm;
1461 last_prologue_pc = next_pc;
1463 else if (qp == 0 && rN == 2
1464 && ((rM == fp_reg && fp_reg != 0) || rM == 12))
1466 char buf[MAX_REGISTER_SIZE];
1467 CORE_ADDR saved_sp = 0;
1468 /* adds r2, spilloffset, rFramePointer
1470 adds r2, spilloffset, r12
1472 Get ready for stf.spill or st8.spill instructions.
1473 The address to start spilling at is loaded into r2.
1474 FIXME: Why r2? That's what gcc currently uses; it
1475 could well be different for other compilers. */
1477 /* Hmm... whether or not this will work will depend on
1478 where the pc is. If it's still early in the prologue
1479 this'll be wrong. FIXME */
1482 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1483 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1484 get_frame_register (this_frame, sp_regnum, buf);
1485 saved_sp = extract_unsigned_integer (buf, 8, byte_order);
1487 spill_addr = saved_sp
1488 + (rM == 12 ? 0 : mem_stack_frame_size)
1491 last_prologue_pc = next_pc;
1493 else if (qp == 0 && rM >= 32 && rM < 40 && !instores[rM-32] &&
1494 rN < 256 && imm == 0)
1496 /* mov rN, rM where rM is an input register */
1497 reg_contents[rN] = rM;
1498 last_prologue_pc = next_pc;
1500 else if (frameless && qp == 0 && rN == fp_reg && imm == 0 &&
1504 last_prologue_pc = next_pc;
1509 && ( ((instr & 0x1efc0000000LL) == 0x0eec0000000LL)
1510 || ((instr & 0x1ffc8000000LL) == 0x0cec0000000LL) ))
1512 /* stf.spill [rN] = fM, imm9
1514 stf.spill [rN] = fM */
1516 int imm = imm9(instr);
1517 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1518 int fM = (int) ((instr & 0x000000fe000LL) >> 13);
1519 int qp = (int) (instr & 0x0000000003fLL);
1520 if (qp == 0 && rN == spill_reg && spill_addr != 0
1521 && ((2 <= fM && fM <= 5) || (16 <= fM && fM <= 31)))
1523 cache->saved_regs[IA64_FR0_REGNUM + fM] = spill_addr;
1525 if ((instr & 0x1efc0000000LL) == 0x0eec0000000LL)
1528 spill_addr = 0; /* last one; must be done */
1529 last_prologue_pc = next_pc;
1532 else if ((it == M && ((instr & 0x1eff8000000LL) == 0x02110000000LL))
1533 || (it == I && ((instr & 0x1eff8000000LL) == 0x00050000000LL)) )
1539 int arM = (int) ((instr & 0x00007f00000LL) >> 20);
1540 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1541 int qp = (int) (instr & 0x0000000003fLL);
1542 if (qp == 0 && isScratch (rN) && arM == 36 /* ar.unat */)
1544 /* We have something like "mov.m r3 = ar.unat". Remember the
1545 r3 (or whatever) and watch for a store of this register... */
1547 last_prologue_pc = next_pc;
1550 else if (it == I && ((instr & 0x1eff8000000LL) == 0x00198000000LL))
1553 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1554 int qp = (int) (instr & 0x0000000003fLL);
1555 if (qp == 0 && isScratch (rN))
1558 last_prologue_pc = next_pc;
1562 && ( ((instr & 0x1ffc8000000LL) == 0x08cc0000000LL)
1563 || ((instr & 0x1efc0000000LL) == 0x0acc0000000LL)))
1567 st8 [rN] = rM, imm9 */
1568 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1569 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1570 int qp = (int) (instr & 0x0000000003fLL);
1571 int indirect = rM < 256 ? reg_contents[rM] : 0;
1572 if (qp == 0 && rN == spill_reg && spill_addr != 0
1573 && (rM == unat_save_reg || rM == pr_save_reg))
1575 /* We've found a spill of either the UNAT register or the PR
1576 register. (Well, not exactly; what we've actually found is
1577 a spill of the register that UNAT or PR was moved to).
1578 Record that fact and move on... */
1579 if (rM == unat_save_reg)
1581 /* Track UNAT register */
1582 cache->saved_regs[IA64_UNAT_REGNUM] = spill_addr;
1587 /* Track PR register */
1588 cache->saved_regs[IA64_PR_REGNUM] = spill_addr;
1591 if ((instr & 0x1efc0000000LL) == 0x0acc0000000LL)
1592 /* st8 [rN] = rM, imm9 */
1593 spill_addr += imm9(instr);
1595 spill_addr = 0; /* must be done spilling */
1596 last_prologue_pc = next_pc;
1598 else if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32])
1600 /* Allow up to one store of each input register. */
1601 instores[rM-32] = 1;
1602 last_prologue_pc = next_pc;
1604 else if (qp == 0 && 32 <= indirect && indirect < 40 &&
1605 !instores[indirect-32])
1607 /* Allow an indirect store of an input register. */
1608 instores[indirect-32] = 1;
1609 last_prologue_pc = next_pc;
1612 else if (it == M && ((instr & 0x1ff08000000LL) == 0x08c00000000LL))
1619 Note that the st8 case is handled in the clause above.
1621 Advance over stores of input registers. One store per input
1622 register is permitted. */
1623 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1624 int qp = (int) (instr & 0x0000000003fLL);
1625 int indirect = rM < 256 ? reg_contents[rM] : 0;
1626 if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32])
1628 instores[rM-32] = 1;
1629 last_prologue_pc = next_pc;
1631 else if (qp == 0 && 32 <= indirect && indirect < 40 &&
1632 !instores[indirect-32])
1634 /* Allow an indirect store of an input register. */
1635 instores[indirect-32] = 1;
1636 last_prologue_pc = next_pc;
1639 else if (it == M && ((instr & 0x1ff88000000LL) == 0x0cc80000000LL))
1646 Advance over stores of floating point input registers. Again
1647 one store per register is permitted */
1648 int fM = (int) ((instr & 0x000000fe000LL) >> 13);
1649 int qp = (int) (instr & 0x0000000003fLL);
1650 if (qp == 0 && 8 <= fM && fM < 16 && !infpstores[fM - 8])
1652 infpstores[fM-8] = 1;
1653 last_prologue_pc = next_pc;
1657 && ( ((instr & 0x1ffc8000000LL) == 0x08ec0000000LL)
1658 || ((instr & 0x1efc0000000LL) == 0x0aec0000000LL)))
1660 /* st8.spill [rN] = rM
1662 st8.spill [rN] = rM, imm9 */
1663 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1664 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1665 int qp = (int) (instr & 0x0000000003fLL);
1666 if (qp == 0 && rN == spill_reg && 4 <= rM && rM <= 7)
1668 /* We've found a spill of one of the preserved general purpose
1669 regs. Record the spill address and advance the spill
1670 register if appropriate. */
1671 cache->saved_regs[IA64_GR0_REGNUM + rM] = spill_addr;
1672 if ((instr & 0x1efc0000000LL) == 0x0aec0000000LL)
1673 /* st8.spill [rN] = rM, imm9 */
1674 spill_addr += imm9(instr);
1676 spill_addr = 0; /* Done spilling */
1677 last_prologue_pc = next_pc;
1684 /* If not frameless and we aren't called by skip_prologue, then we need
1685 to calculate registers for the previous frame which will be needed
1688 if (!frameless && this_frame)
1690 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1691 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1693 /* Extract the size of the rotating portion of the stack
1694 frame and the register rename base from the current
1700 rrb_gr = (cfm >> 18) & 0x7f;
1702 /* Find the bof (beginning of frame). */
1703 bof = rse_address_add (cache->bsp, -sof);
1705 for (i = 0, addr = bof;
1709 if (IS_NaT_COLLECTION_ADDR (addr))
1713 if (i+32 == cfm_reg)
1714 cache->saved_regs[IA64_CFM_REGNUM] = addr;
1715 if (i+32 == ret_reg)
1716 cache->saved_regs[IA64_VRAP_REGNUM] = addr;
1718 cache->saved_regs[IA64_VFP_REGNUM] = addr;
1721 /* For the previous argument registers we require the previous bof.
1722 If we can't find the previous cfm, then we can do nothing. */
1724 if (cache->saved_regs[IA64_CFM_REGNUM] != 0)
1726 cfm = read_memory_integer (cache->saved_regs[IA64_CFM_REGNUM],
1729 else if (cfm_reg != 0)
1731 get_frame_register (this_frame, cfm_reg, buf);
1732 cfm = extract_unsigned_integer (buf, 8, byte_order);
1734 cache->prev_cfm = cfm;
1738 sor = ((cfm >> 14) & 0xf) * 8;
1740 sol = (cfm >> 7) & 0x7f;
1741 rrb_gr = (cfm >> 18) & 0x7f;
1743 /* The previous bof only requires subtraction of the sol (size of
1744 locals) due to the overlap between output and input of
1745 subsequent frames. */
1746 bof = rse_address_add (bof, -sol);
1748 for (i = 0, addr = bof;
1752 if (IS_NaT_COLLECTION_ADDR (addr))
1757 cache->saved_regs[IA64_GR32_REGNUM + ((i + (sor - rrb_gr)) % sor)]
1760 cache->saved_regs[IA64_GR32_REGNUM + i] = addr;
1766 /* Try and trust the lim_pc value whenever possible. */
1767 if (trust_limit && lim_pc >= last_prologue_pc)
1768 last_prologue_pc = lim_pc;
1770 cache->frameless = frameless;
1771 cache->after_prologue = last_prologue_pc;
1772 cache->mem_stack_frame_size = mem_stack_frame_size;
1773 cache->fp_reg = fp_reg;
1775 return last_prologue_pc;
1779 ia64_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
1781 struct ia64_frame_cache cache;
1783 cache.after_prologue = 0;
1787 /* Call examine_prologue with - as third argument since we don't have a next frame pointer to send. */
1788 return examine_prologue (pc, pc+1024, 0, &cache);
1792 /* Normal frames. */
1794 static struct ia64_frame_cache *
1795 ia64_frame_cache (struct frame_info *this_frame, void **this_cache)
1797 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1798 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1799 struct ia64_frame_cache *cache;
1801 CORE_ADDR cfm, sof, sol, bsp, psr;
1807 cache = ia64_alloc_frame_cache ();
1808 *this_cache = cache;
1810 get_frame_register (this_frame, sp_regnum, buf);
1811 cache->saved_sp = extract_unsigned_integer (buf, 8, byte_order);
1813 /* We always want the bsp to point to the end of frame.
1814 This way, we can always get the beginning of frame (bof)
1815 by subtracting frame size. */
1816 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
1817 cache->bsp = extract_unsigned_integer (buf, 8, byte_order);
1819 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
1820 psr = extract_unsigned_integer (buf, 8, byte_order);
1822 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
1823 cfm = extract_unsigned_integer (buf, 8, byte_order);
1825 cache->sof = (cfm & 0x7f);
1826 cache->sol = (cfm >> 7) & 0x7f;
1827 cache->sor = ((cfm >> 14) & 0xf) * 8;
1831 cache->pc = get_frame_func (this_frame);
1834 examine_prologue (cache->pc, get_frame_pc (this_frame), this_frame, cache);
1836 cache->base = cache->saved_sp + cache->mem_stack_frame_size;
1842 ia64_frame_this_id (struct frame_info *this_frame, void **this_cache,
1843 struct frame_id *this_id)
1845 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1846 struct ia64_frame_cache *cache =
1847 ia64_frame_cache (this_frame, this_cache);
1849 /* If outermost frame, mark with null frame id. */
1850 if (cache->base != 0)
1851 (*this_id) = frame_id_build_special (cache->base, cache->pc, cache->bsp);
1852 if (gdbarch_debug >= 1)
1853 fprintf_unfiltered (gdb_stdlog,
1854 "regular frame id: code %s, stack %s, special %s, this_frame %s\n",
1855 paddress (gdbarch, this_id->code_addr),
1856 paddress (gdbarch, this_id->stack_addr),
1857 paddress (gdbarch, cache->bsp),
1858 host_address_to_string (this_frame));
1861 static struct value *
1862 ia64_frame_prev_register (struct frame_info *this_frame, void **this_cache,
1865 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1866 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1867 struct ia64_frame_cache *cache = ia64_frame_cache (this_frame, this_cache);
1870 gdb_assert (regnum >= 0);
1872 if (!target_has_registers)
1873 error (_("No registers."));
1875 if (regnum == gdbarch_sp_regnum (gdbarch))
1876 return frame_unwind_got_constant (this_frame, regnum, cache->base);
1878 else if (regnum == IA64_BSP_REGNUM)
1881 CORE_ADDR prev_cfm, bsp, prev_bsp;
1883 /* We want to calculate the previous bsp as the end of the previous
1884 register stack frame. This corresponds to what the hardware bsp
1885 register will be if we pop the frame back which is why we might
1886 have been called. We know the beginning of the current frame is
1887 cache->bsp - cache->sof. This value in the previous frame points
1888 to the start of the output registers. We can calculate the end of
1889 that frame by adding the size of output:
1890 (sof (size of frame) - sol (size of locals)). */
1891 val = ia64_frame_prev_register (this_frame, this_cache, IA64_CFM_REGNUM);
1892 prev_cfm = extract_unsigned_integer (value_contents_all (val),
1894 bsp = rse_address_add (cache->bsp, -(cache->sof));
1896 rse_address_add (bsp, (prev_cfm & 0x7f) - ((prev_cfm >> 7) & 0x7f));
1898 return frame_unwind_got_constant (this_frame, regnum, prev_bsp);
1901 else if (regnum == IA64_CFM_REGNUM)
1903 CORE_ADDR addr = cache->saved_regs[IA64_CFM_REGNUM];
1906 return frame_unwind_got_memory (this_frame, regnum, addr);
1908 if (cache->prev_cfm)
1909 return frame_unwind_got_constant (this_frame, regnum, cache->prev_cfm);
1911 if (cache->frameless)
1912 return frame_unwind_got_register (this_frame, IA64_PFS_REGNUM,
1914 return frame_unwind_got_register (this_frame, regnum, 0);
1917 else if (regnum == IA64_VFP_REGNUM)
1919 /* If the function in question uses an automatic register (r32-r127)
1920 for the frame pointer, it'll be found by ia64_find_saved_register()
1921 above. If the function lacks one of these frame pointers, we can
1922 still provide a value since we know the size of the frame. */
1923 return frame_unwind_got_constant (this_frame, regnum, cache->base);
1926 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
1928 struct value *pr_val;
1931 pr_val = ia64_frame_prev_register (this_frame, this_cache,
1933 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
1935 /* Fetch predicate register rename base from current frame
1936 marker for this frame. */
1937 int rrb_pr = (cache->cfm >> 32) & 0x3f;
1939 /* Adjust the register number to account for register rotation. */
1940 regnum = VP16_REGNUM + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
1942 prN = extract_bit_field (value_contents_all (pr_val),
1943 regnum - VP0_REGNUM, 1);
1944 return frame_unwind_got_constant (this_frame, regnum, prN);
1947 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
1949 struct value *unat_val;
1951 unat_val = ia64_frame_prev_register (this_frame, this_cache,
1953 unatN = extract_bit_field (value_contents_all (unat_val),
1954 regnum - IA64_NAT0_REGNUM, 1);
1955 return frame_unwind_got_constant (this_frame, regnum, unatN);
1958 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
1961 /* Find address of general register corresponding to nat bit we're
1965 gr_addr = cache->saved_regs[regnum - IA64_NAT0_REGNUM + IA64_GR0_REGNUM];
1969 /* Compute address of nat collection bits. */
1970 CORE_ADDR nat_addr = gr_addr | 0x1f8;
1972 CORE_ADDR nat_collection;
1975 /* If our nat collection address is bigger than bsp, we have to get
1976 the nat collection from rnat. Otherwise, we fetch the nat
1977 collection from the computed address. */
1978 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
1979 bsp = extract_unsigned_integer (buf, 8, byte_order);
1980 if (nat_addr >= bsp)
1982 get_frame_register (this_frame, IA64_RNAT_REGNUM, buf);
1983 nat_collection = extract_unsigned_integer (buf, 8, byte_order);
1986 nat_collection = read_memory_integer (nat_addr, 8, byte_order);
1987 nat_bit = (gr_addr >> 3) & 0x3f;
1988 natval = (nat_collection >> nat_bit) & 1;
1991 return frame_unwind_got_constant (this_frame, regnum, natval);
1994 else if (regnum == IA64_IP_REGNUM)
1997 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
2001 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
2002 pc = extract_unsigned_integer (buf, 8, byte_order);
2004 else if (cache->frameless)
2006 get_frame_register (this_frame, IA64_BR0_REGNUM, buf);
2007 pc = extract_unsigned_integer (buf, 8, byte_order);
2010 return frame_unwind_got_constant (this_frame, regnum, pc);
2013 else if (regnum == IA64_PSR_REGNUM)
2015 /* We don't know how to get the complete previous PSR, but we need it
2016 for the slot information when we unwind the pc (pc is formed of IP
2017 register plus slot information from PSR). To get the previous
2018 slot information, we mask it off the return address. */
2019 ULONGEST slot_num = 0;
2022 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
2024 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
2025 psr = extract_unsigned_integer (buf, 8, byte_order);
2029 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
2030 pc = extract_unsigned_integer (buf, 8, byte_order);
2032 else if (cache->frameless)
2034 get_frame_register (this_frame, IA64_BR0_REGNUM, buf);
2035 pc = extract_unsigned_integer (buf, 8, byte_order);
2037 psr &= ~(3LL << 41);
2038 slot_num = pc & 0x3LL;
2039 psr |= (CORE_ADDR)slot_num << 41;
2040 return frame_unwind_got_constant (this_frame, regnum, psr);
2043 else if (regnum == IA64_BR0_REGNUM)
2045 CORE_ADDR addr = cache->saved_regs[IA64_BR0_REGNUM];
2048 return frame_unwind_got_memory (this_frame, regnum, addr);
2050 return frame_unwind_got_constant (this_frame, regnum, 0);
2053 else if ((regnum >= IA64_GR32_REGNUM && regnum <= IA64_GR127_REGNUM)
2054 || (regnum >= V32_REGNUM && regnum <= V127_REGNUM))
2058 if (regnum >= V32_REGNUM)
2059 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
2060 addr = cache->saved_regs[regnum];
2062 return frame_unwind_got_memory (this_frame, regnum, addr);
2064 if (cache->frameless)
2066 struct value *reg_val;
2067 CORE_ADDR prev_cfm, prev_bsp, prev_bof;
2069 /* FIXME: brobecker/2008-05-01: Doesn't this seem redundant
2070 with the same code above? */
2071 if (regnum >= V32_REGNUM)
2072 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
2073 reg_val = ia64_frame_prev_register (this_frame, this_cache,
2075 prev_cfm = extract_unsigned_integer (value_contents_all (reg_val),
2077 reg_val = ia64_frame_prev_register (this_frame, this_cache,
2079 prev_bsp = extract_unsigned_integer (value_contents_all (reg_val),
2081 prev_bof = rse_address_add (prev_bsp, -(prev_cfm & 0x7f));
2083 addr = rse_address_add (prev_bof, (regnum - IA64_GR32_REGNUM));
2084 return frame_unwind_got_memory (this_frame, regnum, addr);
2087 return frame_unwind_got_constant (this_frame, regnum, 0);
2090 else /* All other registers. */
2094 if (IA64_FR32_REGNUM <= regnum && regnum <= IA64_FR127_REGNUM)
2096 /* Fetch floating point register rename base from current
2097 frame marker for this frame. */
2098 int rrb_fr = (cache->cfm >> 25) & 0x7f;
2100 /* Adjust the floating point register number to account for
2101 register rotation. */
2102 regnum = IA64_FR32_REGNUM
2103 + ((regnum - IA64_FR32_REGNUM) + rrb_fr) % 96;
2106 /* If we have stored a memory address, access the register. */
2107 addr = cache->saved_regs[regnum];
2109 return frame_unwind_got_memory (this_frame, regnum, addr);
2110 /* Otherwise, punt and get the current value of the register. */
2112 return frame_unwind_got_register (this_frame, regnum, regnum);
2116 static const struct frame_unwind ia64_frame_unwind =
2119 &ia64_frame_this_id,
2120 &ia64_frame_prev_register,
2122 default_frame_sniffer
2125 /* Signal trampolines. */
2128 ia64_sigtramp_frame_init_saved_regs (struct frame_info *this_frame,
2129 struct ia64_frame_cache *cache)
2131 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2132 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
2134 if (tdep->sigcontext_register_address)
2138 cache->saved_regs[IA64_VRAP_REGNUM] =
2139 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_IP_REGNUM);
2140 cache->saved_regs[IA64_CFM_REGNUM] =
2141 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_CFM_REGNUM);
2142 cache->saved_regs[IA64_PSR_REGNUM] =
2143 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_PSR_REGNUM);
2144 cache->saved_regs[IA64_BSP_REGNUM] =
2145 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_BSP_REGNUM);
2146 cache->saved_regs[IA64_RNAT_REGNUM] =
2147 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_RNAT_REGNUM);
2148 cache->saved_regs[IA64_CCV_REGNUM] =
2149 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_CCV_REGNUM);
2150 cache->saved_regs[IA64_UNAT_REGNUM] =
2151 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_UNAT_REGNUM);
2152 cache->saved_regs[IA64_FPSR_REGNUM] =
2153 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_FPSR_REGNUM);
2154 cache->saved_regs[IA64_PFS_REGNUM] =
2155 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_PFS_REGNUM);
2156 cache->saved_regs[IA64_LC_REGNUM] =
2157 tdep->sigcontext_register_address (gdbarch, cache->base, IA64_LC_REGNUM);
2158 for (regno = IA64_GR1_REGNUM; regno <= IA64_GR31_REGNUM; regno++)
2159 cache->saved_regs[regno] =
2160 tdep->sigcontext_register_address (gdbarch, cache->base, regno);
2161 for (regno = IA64_BR0_REGNUM; regno <= IA64_BR7_REGNUM; regno++)
2162 cache->saved_regs[regno] =
2163 tdep->sigcontext_register_address (gdbarch, cache->base, regno);
2164 for (regno = IA64_FR2_REGNUM; regno <= IA64_FR31_REGNUM; regno++)
2165 cache->saved_regs[regno] =
2166 tdep->sigcontext_register_address (gdbarch, cache->base, regno);
2170 static struct ia64_frame_cache *
2171 ia64_sigtramp_frame_cache (struct frame_info *this_frame, void **this_cache)
2173 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2174 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2175 struct ia64_frame_cache *cache;
2183 cache = ia64_alloc_frame_cache ();
2185 get_frame_register (this_frame, sp_regnum, buf);
2186 /* Note that frame size is hard-coded below. We cannot calculate it
2187 via prologue examination. */
2188 cache->base = extract_unsigned_integer (buf, 8, byte_order) + 16;
2190 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2191 cache->bsp = extract_unsigned_integer (buf, 8, byte_order);
2193 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2194 cache->cfm = extract_unsigned_integer (buf, 8, byte_order);
2195 cache->sof = cache->cfm & 0x7f;
2197 ia64_sigtramp_frame_init_saved_regs (this_frame, cache);
2199 *this_cache = cache;
2204 ia64_sigtramp_frame_this_id (struct frame_info *this_frame,
2205 void **this_cache, struct frame_id *this_id)
2207 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2208 struct ia64_frame_cache *cache =
2209 ia64_sigtramp_frame_cache (this_frame, this_cache);
2211 (*this_id) = frame_id_build_special (cache->base,
2212 get_frame_pc (this_frame),
2214 if (gdbarch_debug >= 1)
2215 fprintf_unfiltered (gdb_stdlog,
2216 "sigtramp frame id: code %s, stack %s, special %s, this_frame %s\n",
2217 paddress (gdbarch, this_id->code_addr),
2218 paddress (gdbarch, this_id->stack_addr),
2219 paddress (gdbarch, cache->bsp),
2220 host_address_to_string (this_frame));
2223 static struct value *
2224 ia64_sigtramp_frame_prev_register (struct frame_info *this_frame,
2225 void **this_cache, int regnum)
2227 char buf[MAX_REGISTER_SIZE];
2229 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2230 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2231 struct ia64_frame_cache *cache =
2232 ia64_sigtramp_frame_cache (this_frame, this_cache);
2234 gdb_assert (regnum >= 0);
2236 if (!target_has_registers)
2237 error (_("No registers."));
2239 if (regnum == IA64_IP_REGNUM)
2242 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
2246 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
2247 pc = extract_unsigned_integer (buf, 8, byte_order);
2250 return frame_unwind_got_constant (this_frame, regnum, pc);
2253 else if ((regnum >= IA64_GR32_REGNUM && regnum <= IA64_GR127_REGNUM)
2254 || (regnum >= V32_REGNUM && regnum <= V127_REGNUM))
2258 if (regnum >= V32_REGNUM)
2259 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
2260 addr = cache->saved_regs[regnum];
2262 return frame_unwind_got_memory (this_frame, regnum, addr);
2264 return frame_unwind_got_constant (this_frame, regnum, 0);
2267 else /* All other registers not listed above. */
2269 CORE_ADDR addr = cache->saved_regs[regnum];
2272 return frame_unwind_got_memory (this_frame, regnum, addr);
2274 return frame_unwind_got_constant (this_frame, regnum, 0);
2279 ia64_sigtramp_frame_sniffer (const struct frame_unwind *self,
2280 struct frame_info *this_frame,
2283 struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame));
2284 if (tdep->pc_in_sigtramp)
2286 CORE_ADDR pc = get_frame_pc (this_frame);
2288 if (tdep->pc_in_sigtramp (pc))
2295 static const struct frame_unwind ia64_sigtramp_frame_unwind =
2298 ia64_sigtramp_frame_this_id,
2299 ia64_sigtramp_frame_prev_register,
2301 ia64_sigtramp_frame_sniffer
2307 ia64_frame_base_address (struct frame_info *this_frame, void **this_cache)
2309 struct ia64_frame_cache *cache = ia64_frame_cache (this_frame, this_cache);
2314 static const struct frame_base ia64_frame_base =
2317 ia64_frame_base_address,
2318 ia64_frame_base_address,
2319 ia64_frame_base_address
2322 #ifdef HAVE_LIBUNWIND_IA64_H
2324 struct ia64_unwind_table_entry
2326 unw_word_t start_offset;
2327 unw_word_t end_offset;
2328 unw_word_t info_offset;
2331 static __inline__ uint64_t
2332 ia64_rse_slot_num (uint64_t addr)
2334 return (addr >> 3) & 0x3f;
2337 /* Skip over a designated number of registers in the backing
2338 store, remembering every 64th position is for NAT. */
2339 static __inline__ uint64_t
2340 ia64_rse_skip_regs (uint64_t addr, long num_regs)
2342 long delta = ia64_rse_slot_num(addr) + num_regs;
2346 return addr + ((num_regs + delta/0x3f) << 3);
2349 /* Gdb libunwind-frame callback function to convert from an ia64 gdb register
2350 number to a libunwind register number. */
2352 ia64_gdb2uw_regnum (int regnum)
2354 if (regnum == sp_regnum)
2356 else if (regnum == IA64_BSP_REGNUM)
2357 return UNW_IA64_BSP;
2358 else if ((unsigned) (regnum - IA64_GR0_REGNUM) < 128)
2359 return UNW_IA64_GR + (regnum - IA64_GR0_REGNUM);
2360 else if ((unsigned) (regnum - V32_REGNUM) < 95)
2361 return UNW_IA64_GR + 32 + (regnum - V32_REGNUM);
2362 else if ((unsigned) (regnum - IA64_FR0_REGNUM) < 128)
2363 return UNW_IA64_FR + (regnum - IA64_FR0_REGNUM);
2364 else if ((unsigned) (regnum - IA64_PR0_REGNUM) < 64)
2366 else if ((unsigned) (regnum - IA64_BR0_REGNUM) < 8)
2367 return UNW_IA64_BR + (regnum - IA64_BR0_REGNUM);
2368 else if (regnum == IA64_PR_REGNUM)
2370 else if (regnum == IA64_IP_REGNUM)
2372 else if (regnum == IA64_CFM_REGNUM)
2373 return UNW_IA64_CFM;
2374 else if ((unsigned) (regnum - IA64_AR0_REGNUM) < 128)
2375 return UNW_IA64_AR + (regnum - IA64_AR0_REGNUM);
2376 else if ((unsigned) (regnum - IA64_NAT0_REGNUM) < 128)
2377 return UNW_IA64_NAT + (regnum - IA64_NAT0_REGNUM);
2382 /* Gdb libunwind-frame callback function to convert from a libunwind register
2383 number to a ia64 gdb register number. */
2385 ia64_uw2gdb_regnum (int uw_regnum)
2387 if (uw_regnum == UNW_IA64_SP)
2389 else if (uw_regnum == UNW_IA64_BSP)
2390 return IA64_BSP_REGNUM;
2391 else if ((unsigned) (uw_regnum - UNW_IA64_GR) < 32)
2392 return IA64_GR0_REGNUM + (uw_regnum - UNW_IA64_GR);
2393 else if ((unsigned) (uw_regnum - UNW_IA64_GR) < 128)
2394 return V32_REGNUM + (uw_regnum - (IA64_GR0_REGNUM + 32));
2395 else if ((unsigned) (uw_regnum - UNW_IA64_FR) < 128)
2396 return IA64_FR0_REGNUM + (uw_regnum - UNW_IA64_FR);
2397 else if ((unsigned) (uw_regnum - UNW_IA64_BR) < 8)
2398 return IA64_BR0_REGNUM + (uw_regnum - UNW_IA64_BR);
2399 else if (uw_regnum == UNW_IA64_PR)
2400 return IA64_PR_REGNUM;
2401 else if (uw_regnum == UNW_REG_IP)
2402 return IA64_IP_REGNUM;
2403 else if (uw_regnum == UNW_IA64_CFM)
2404 return IA64_CFM_REGNUM;
2405 else if ((unsigned) (uw_regnum - UNW_IA64_AR) < 128)
2406 return IA64_AR0_REGNUM + (uw_regnum - UNW_IA64_AR);
2407 else if ((unsigned) (uw_regnum - UNW_IA64_NAT) < 128)
2408 return IA64_NAT0_REGNUM + (uw_regnum - UNW_IA64_NAT);
2413 /* Gdb libunwind-frame callback function to reveal if register is a float
2416 ia64_is_fpreg (int uw_regnum)
2418 return unw_is_fpreg (uw_regnum);
2421 /* Libunwind callback accessor function for general registers. */
2423 ia64_access_reg (unw_addr_space_t as, unw_regnum_t uw_regnum, unw_word_t *val,
2424 int write, void *arg)
2426 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2427 unw_word_t bsp, sof, sol, cfm, psr, ip;
2428 struct frame_info *this_frame = arg;
2429 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2430 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2431 long new_sof, old_sof;
2432 char buf[MAX_REGISTER_SIZE];
2434 /* We never call any libunwind routines that need to write registers. */
2435 gdb_assert (!write);
2440 /* Libunwind expects to see the pc value which means the slot number
2441 from the psr must be merged with the ip word address. */
2442 get_frame_register (this_frame, IA64_IP_REGNUM, buf);
2443 ip = extract_unsigned_integer (buf, 8, byte_order);
2444 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
2445 psr = extract_unsigned_integer (buf, 8, byte_order);
2446 *val = ip | ((psr >> 41) & 0x3);
2449 case UNW_IA64_AR_BSP:
2450 /* Libunwind expects to see the beginning of the current register
2451 frame so we must account for the fact that ptrace() will return a value
2452 for bsp that points *after* the current register frame. */
2453 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2454 bsp = extract_unsigned_integer (buf, 8, byte_order);
2455 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2456 cfm = extract_unsigned_integer (buf, 8, byte_order);
2458 *val = ia64_rse_skip_regs (bsp, -sof);
2461 case UNW_IA64_AR_BSPSTORE:
2462 /* Libunwind wants bspstore to be after the current register frame.
2463 This is what ptrace() and gdb treats as the regular bsp value. */
2464 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2465 *val = extract_unsigned_integer (buf, 8, byte_order);
2469 /* For all other registers, just unwind the value directly. */
2470 get_frame_register (this_frame, regnum, buf);
2471 *val = extract_unsigned_integer (buf, 8, byte_order);
2475 if (gdbarch_debug >= 1)
2476 fprintf_unfiltered (gdb_stdlog,
2477 " access_reg: from cache: %4s=%s\n",
2478 (((unsigned) regnum <= IA64_NAT127_REGNUM)
2479 ? ia64_register_names[regnum] : "r??"),
2480 paddress (gdbarch, *val));
2484 /* Libunwind callback accessor function for floating-point registers. */
2486 ia64_access_fpreg (unw_addr_space_t as, unw_regnum_t uw_regnum, unw_fpreg_t *val,
2487 int write, void *arg)
2489 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2490 struct frame_info *this_frame = arg;
2492 /* We never call any libunwind routines that need to write registers. */
2493 gdb_assert (!write);
2495 get_frame_register (this_frame, regnum, (char *) val);
2500 /* Libunwind callback accessor function for top-level rse registers. */
2502 ia64_access_rse_reg (unw_addr_space_t as, unw_regnum_t uw_regnum, unw_word_t *val,
2503 int write, void *arg)
2505 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2506 unw_word_t bsp, sof, sol, cfm, psr, ip;
2507 struct regcache *regcache = arg;
2508 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2509 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2510 long new_sof, old_sof;
2511 char buf[MAX_REGISTER_SIZE];
2513 /* We never call any libunwind routines that need to write registers. */
2514 gdb_assert (!write);
2519 /* Libunwind expects to see the pc value which means the slot number
2520 from the psr must be merged with the ip word address. */
2521 regcache_cooked_read (regcache, IA64_IP_REGNUM, buf);
2522 ip = extract_unsigned_integer (buf, 8, byte_order);
2523 regcache_cooked_read (regcache, IA64_PSR_REGNUM, buf);
2524 psr = extract_unsigned_integer (buf, 8, byte_order);
2525 *val = ip | ((psr >> 41) & 0x3);
2528 case UNW_IA64_AR_BSP:
2529 /* Libunwind expects to see the beginning of the current register
2530 frame so we must account for the fact that ptrace() will return a value
2531 for bsp that points *after* the current register frame. */
2532 regcache_cooked_read (regcache, IA64_BSP_REGNUM, buf);
2533 bsp = extract_unsigned_integer (buf, 8, byte_order);
2534 regcache_cooked_read (regcache, IA64_CFM_REGNUM, buf);
2535 cfm = extract_unsigned_integer (buf, 8, byte_order);
2537 *val = ia64_rse_skip_regs (bsp, -sof);
2540 case UNW_IA64_AR_BSPSTORE:
2541 /* Libunwind wants bspstore to be after the current register frame.
2542 This is what ptrace() and gdb treats as the regular bsp value. */
2543 regcache_cooked_read (regcache, IA64_BSP_REGNUM, buf);
2544 *val = extract_unsigned_integer (buf, 8, byte_order);
2548 /* For all other registers, just unwind the value directly. */
2549 regcache_cooked_read (regcache, regnum, buf);
2550 *val = extract_unsigned_integer (buf, 8, byte_order);
2554 if (gdbarch_debug >= 1)
2555 fprintf_unfiltered (gdb_stdlog,
2556 " access_rse_reg: from cache: %4s=%s\n",
2557 (((unsigned) regnum <= IA64_NAT127_REGNUM)
2558 ? ia64_register_names[regnum] : "r??"),
2559 paddress (gdbarch, *val));
2564 /* Libunwind callback accessor function for top-level fp registers. */
2566 ia64_access_rse_fpreg (unw_addr_space_t as, unw_regnum_t uw_regnum,
2567 unw_fpreg_t *val, int write, void *arg)
2569 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2570 struct regcache *regcache = arg;
2572 /* We never call any libunwind routines that need to write registers. */
2573 gdb_assert (!write);
2575 regcache_cooked_read (regcache, regnum, (char *) val);
2580 /* Libunwind callback accessor function for accessing memory. */
2582 ia64_access_mem (unw_addr_space_t as,
2583 unw_word_t addr, unw_word_t *val,
2584 int write, void *arg)
2586 if (addr - KERNEL_START < ktab_size)
2588 unw_word_t *laddr = (unw_word_t*) ((char *) ktab
2589 + (addr - KERNEL_START));
2598 /* XXX do we need to normalize byte-order here? */
2600 return target_write_memory (addr, (char *) val, sizeof (unw_word_t));
2602 return target_read_memory (addr, (char *) val, sizeof (unw_word_t));
2605 /* Call low-level function to access the kernel unwind table. */
2607 getunwind_table (gdb_byte **buf_p)
2611 /* FIXME drow/2005-09-10: This code used to call
2612 ia64_linux_xfer_unwind_table directly to fetch the unwind table
2613 for the currently running ia64-linux kernel. That data should
2614 come from the core file and be accessed via the auxv vector; if
2615 we want to preserve fall back to the running kernel's table, then
2616 we should find a way to override the corefile layer's
2617 xfer_partial method. */
2619 x = target_read_alloc (¤t_target, TARGET_OBJECT_UNWIND_TABLE,
2625 /* Get the kernel unwind table. */
2627 get_kernel_table (unw_word_t ip, unw_dyn_info_t *di)
2629 static struct ia64_table_entry *etab;
2636 size = getunwind_table (&ktab_buf);
2638 return -UNW_ENOINFO;
2640 ktab = (struct ia64_table_entry *) ktab_buf;
2643 for (etab = ktab; etab->start_offset; ++etab)
2644 etab->info_offset += KERNEL_START;
2647 if (ip < ktab[0].start_offset || ip >= etab[-1].end_offset)
2648 return -UNW_ENOINFO;
2650 di->format = UNW_INFO_FORMAT_TABLE;
2652 di->start_ip = ktab[0].start_offset;
2653 di->end_ip = etab[-1].end_offset;
2654 di->u.ti.name_ptr = (unw_word_t) "<kernel>";
2655 di->u.ti.segbase = 0;
2656 di->u.ti.table_len = ((char *) etab - (char *) ktab) / sizeof (unw_word_t);
2657 di->u.ti.table_data = (unw_word_t *) ktab;
2659 if (gdbarch_debug >= 1)
2660 fprintf_unfiltered (gdb_stdlog, "get_kernel_table: found table `%s': "
2661 "segbase=%s, length=%s, gp=%s\n",
2662 (char *) di->u.ti.name_ptr,
2663 hex_string (di->u.ti.segbase),
2664 pulongest (di->u.ti.table_len),
2665 hex_string (di->gp));
2669 /* Find the unwind table entry for a specified address. */
2671 ia64_find_unwind_table (struct objfile *objfile, unw_word_t ip,
2672 unw_dyn_info_t *dip, void **buf)
2674 Elf_Internal_Phdr *phdr, *p_text = NULL, *p_unwind = NULL;
2675 Elf_Internal_Ehdr *ehdr;
2676 unw_word_t segbase = 0;
2677 CORE_ADDR load_base;
2681 bfd = objfile->obfd;
2683 ehdr = elf_tdata (bfd)->elf_header;
2684 phdr = elf_tdata (bfd)->phdr;
2686 load_base = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2688 for (i = 0; i < ehdr->e_phnum; ++i)
2690 switch (phdr[i].p_type)
2693 if ((unw_word_t) (ip - load_base - phdr[i].p_vaddr)
2698 case PT_IA_64_UNWIND:
2699 p_unwind = phdr + i;
2707 if (!p_text || !p_unwind)
2708 return -UNW_ENOINFO;
2710 /* Verify that the segment that contains the IP also contains
2711 the static unwind table. If not, we may be in the Linux kernel's
2712 DSO gate page in which case the unwind table is another segment.
2713 Otherwise, we are dealing with runtime-generated code, for which we
2714 have no info here. */
2715 segbase = p_text->p_vaddr + load_base;
2717 if ((p_unwind->p_vaddr - p_text->p_vaddr) >= p_text->p_memsz)
2720 for (i = 0; i < ehdr->e_phnum; ++i)
2722 if (phdr[i].p_type == PT_LOAD
2723 && (p_unwind->p_vaddr - phdr[i].p_vaddr) < phdr[i].p_memsz)
2726 /* Get the segbase from the section containing the
2728 segbase = phdr[i].p_vaddr + load_base;
2732 return -UNW_ENOINFO;
2735 dip->start_ip = p_text->p_vaddr + load_base;
2736 dip->end_ip = dip->start_ip + p_text->p_memsz;
2737 dip->gp = ia64_find_global_pointer (get_objfile_arch (objfile), ip);
2738 dip->format = UNW_INFO_FORMAT_REMOTE_TABLE;
2739 dip->u.rti.name_ptr = (unw_word_t) bfd_get_filename (bfd);
2740 dip->u.rti.segbase = segbase;
2741 dip->u.rti.table_len = p_unwind->p_memsz / sizeof (unw_word_t);
2742 dip->u.rti.table_data = p_unwind->p_vaddr + load_base;
2747 /* Libunwind callback accessor function to acquire procedure unwind-info. */
2749 ia64_find_proc_info_x (unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
2750 int need_unwind_info, void *arg)
2752 struct obj_section *sec = find_pc_section (ip);
2759 /* XXX This only works if the host and the target architecture are
2760 both ia64 and if the have (more or less) the same kernel
2762 if (get_kernel_table (ip, &di) < 0)
2763 return -UNW_ENOINFO;
2765 if (gdbarch_debug >= 1)
2766 fprintf_unfiltered (gdb_stdlog, "ia64_find_proc_info_x: %s -> "
2767 "(name=`%s',segbase=%s,start=%s,end=%s,gp=%s,"
2768 "length=%s,data=%s)\n",
2769 hex_string (ip), (char *)di.u.ti.name_ptr,
2770 hex_string (di.u.ti.segbase),
2771 hex_string (di.start_ip), hex_string (di.end_ip),
2773 pulongest (di.u.ti.table_len),
2774 hex_string ((CORE_ADDR)di.u.ti.table_data));
2778 ret = ia64_find_unwind_table (sec->objfile, ip, &di, &buf);
2782 if (gdbarch_debug >= 1)
2783 fprintf_unfiltered (gdb_stdlog, "ia64_find_proc_info_x: %s -> "
2784 "(name=`%s',segbase=%s,start=%s,end=%s,gp=%s,"
2785 "length=%s,data=%s)\n",
2786 hex_string (ip), (char *)di.u.rti.name_ptr,
2787 hex_string (di.u.rti.segbase),
2788 hex_string (di.start_ip), hex_string (di.end_ip),
2790 pulongest (di.u.rti.table_len),
2791 hex_string (di.u.rti.table_data));
2794 ret = libunwind_search_unwind_table (&as, ip, &di, pi, need_unwind_info,
2797 /* We no longer need the dyn info storage so free it. */
2803 /* Libunwind callback accessor function for cleanup. */
2805 ia64_put_unwind_info (unw_addr_space_t as,
2806 unw_proc_info_t *pip, void *arg)
2808 /* Nothing required for now. */
2811 /* Libunwind callback accessor function to get head of the dynamic
2812 unwind-info registration list. */
2814 ia64_get_dyn_info_list (unw_addr_space_t as,
2815 unw_word_t *dilap, void *arg)
2817 struct obj_section *text_sec;
2818 struct objfile *objfile;
2819 unw_word_t ip, addr;
2823 if (!libunwind_is_initialized ())
2824 return -UNW_ENOINFO;
2826 for (objfile = object_files; objfile; objfile = objfile->next)
2830 text_sec = objfile->sections + SECT_OFF_TEXT (objfile);
2831 ip = obj_section_addr (text_sec);
2832 ret = ia64_find_unwind_table (objfile, ip, &di, &buf);
2835 addr = libunwind_find_dyn_list (as, &di, arg);
2836 /* We no longer need the dyn info storage so free it. */
2841 if (gdbarch_debug >= 1)
2842 fprintf_unfiltered (gdb_stdlog,
2843 "dynamic unwind table in objfile %s "
2845 bfd_get_filename (objfile->obfd),
2846 hex_string (addr), hex_string (di.gp));
2852 return -UNW_ENOINFO;
2856 /* Frame interface functions for libunwind. */
2859 ia64_libunwind_frame_this_id (struct frame_info *this_frame, void **this_cache,
2860 struct frame_id *this_id)
2862 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2863 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2864 struct frame_id id = outer_frame_id;
2868 libunwind_frame_this_id (this_frame, this_cache, &id);
2869 if (frame_id_eq (id, outer_frame_id))
2871 (*this_id) = outer_frame_id;
2875 /* We must add the bsp as the special address for frame comparison
2877 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2878 bsp = extract_unsigned_integer (buf, 8, byte_order);
2880 (*this_id) = frame_id_build_special (id.stack_addr, id.code_addr, bsp);
2882 if (gdbarch_debug >= 1)
2883 fprintf_unfiltered (gdb_stdlog,
2884 "libunwind frame id: code %s, stack %s, special %s, this_frame %s\n",
2885 paddress (gdbarch, id.code_addr),
2886 paddress (gdbarch, id.stack_addr),
2887 paddress (gdbarch, bsp),
2888 host_address_to_string (this_frame));
2891 static struct value *
2892 ia64_libunwind_frame_prev_register (struct frame_info *this_frame,
2893 void **this_cache, int regnum)
2896 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2897 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2900 if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
2901 reg = IA64_PR_REGNUM;
2902 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
2903 reg = IA64_UNAT_REGNUM;
2905 /* Let libunwind do most of the work. */
2906 val = libunwind_frame_prev_register (this_frame, this_cache, reg);
2908 if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
2912 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
2916 unsigned char buf[MAX_REGISTER_SIZE];
2918 /* Fetch predicate register rename base from current frame
2919 marker for this frame. */
2920 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2921 cfm = extract_unsigned_integer (buf, 8, byte_order);
2922 rrb_pr = (cfm >> 32) & 0x3f;
2924 /* Adjust the register number to account for register rotation. */
2925 regnum = VP16_REGNUM + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
2927 prN_val = extract_bit_field (value_contents_all (val),
2928 regnum - VP0_REGNUM, 1);
2929 return frame_unwind_got_constant (this_frame, regnum, prN_val);
2932 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
2936 unatN_val = extract_bit_field (value_contents_all (val),
2937 regnum - IA64_NAT0_REGNUM, 1);
2938 return frame_unwind_got_constant (this_frame, regnum, unatN_val);
2941 else if (regnum == IA64_BSP_REGNUM)
2943 struct value *cfm_val;
2944 CORE_ADDR prev_bsp, prev_cfm;
2946 /* We want to calculate the previous bsp as the end of the previous
2947 register stack frame. This corresponds to what the hardware bsp
2948 register will be if we pop the frame back which is why we might
2949 have been called. We know that libunwind will pass us back the
2950 beginning of the current frame so we should just add sof to it. */
2951 prev_bsp = extract_unsigned_integer (value_contents_all (val),
2953 cfm_val = libunwind_frame_prev_register (this_frame, this_cache,
2955 prev_cfm = extract_unsigned_integer (value_contents_all (cfm_val),
2957 prev_bsp = rse_address_add (prev_bsp, (prev_cfm & 0x7f));
2959 return frame_unwind_got_constant (this_frame, regnum, prev_bsp);
2966 ia64_libunwind_frame_sniffer (const struct frame_unwind *self,
2967 struct frame_info *this_frame,
2970 if (libunwind_is_initialized ()
2971 && libunwind_frame_sniffer (self, this_frame, this_cache))
2977 static const struct frame_unwind ia64_libunwind_frame_unwind =
2980 ia64_libunwind_frame_this_id,
2981 ia64_libunwind_frame_prev_register,
2983 ia64_libunwind_frame_sniffer,
2984 libunwind_frame_dealloc_cache
2988 ia64_libunwind_sigtramp_frame_this_id (struct frame_info *this_frame,
2990 struct frame_id *this_id)
2992 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2993 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2996 struct frame_id id = outer_frame_id;
2999 libunwind_frame_this_id (this_frame, this_cache, &id);
3000 if (frame_id_eq (id, outer_frame_id))
3002 (*this_id) = outer_frame_id;
3006 /* We must add the bsp as the special address for frame comparison
3008 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
3009 bsp = extract_unsigned_integer (buf, 8, byte_order);
3011 /* For a sigtramp frame, we don't make the check for previous ip being 0. */
3012 (*this_id) = frame_id_build_special (id.stack_addr, id.code_addr, bsp);
3014 if (gdbarch_debug >= 1)
3015 fprintf_unfiltered (gdb_stdlog,
3016 "libunwind sigtramp frame id: code %s, stack %s, special %s, this_frame %s\n",
3017 paddress (gdbarch, id.code_addr),
3018 paddress (gdbarch, id.stack_addr),
3019 paddress (gdbarch, bsp),
3020 host_address_to_string (this_frame));
3023 static struct value *
3024 ia64_libunwind_sigtramp_frame_prev_register (struct frame_info *this_frame,
3025 void **this_cache, int regnum)
3027 struct gdbarch *gdbarch = get_frame_arch (this_frame);
3028 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3029 struct value *prev_ip_val;
3032 /* If the previous frame pc value is 0, then we want to use the SIGCONTEXT
3033 method of getting previous registers. */
3034 prev_ip_val = libunwind_frame_prev_register (this_frame, this_cache,
3036 prev_ip = extract_unsigned_integer (value_contents_all (prev_ip_val),
3041 void *tmp_cache = NULL;
3042 return ia64_sigtramp_frame_prev_register (this_frame, &tmp_cache,
3046 return ia64_libunwind_frame_prev_register (this_frame, this_cache, regnum);
3050 ia64_libunwind_sigtramp_frame_sniffer (const struct frame_unwind *self,
3051 struct frame_info *this_frame,
3054 if (libunwind_is_initialized ())
3056 if (libunwind_sigtramp_frame_sniffer (self, this_frame, this_cache))
3061 return ia64_sigtramp_frame_sniffer (self, this_frame, this_cache);
3064 static const struct frame_unwind ia64_libunwind_sigtramp_frame_unwind =
3067 ia64_libunwind_sigtramp_frame_this_id,
3068 ia64_libunwind_sigtramp_frame_prev_register,
3070 ia64_libunwind_sigtramp_frame_sniffer
3073 /* Set of libunwind callback acccessor functions. */
3074 static unw_accessors_t ia64_unw_accessors =
3076 ia64_find_proc_info_x,
3077 ia64_put_unwind_info,
3078 ia64_get_dyn_info_list,
3086 /* Set of special libunwind callback acccessor functions specific for accessing
3087 the rse registers. At the top of the stack, we want libunwind to figure out
3088 how to read r32 - r127. Though usually they are found sequentially in memory
3089 starting from $bof, this is not always true. */
3090 static unw_accessors_t ia64_unw_rse_accessors =
3092 ia64_find_proc_info_x,
3093 ia64_put_unwind_info,
3094 ia64_get_dyn_info_list,
3096 ia64_access_rse_reg,
3097 ia64_access_rse_fpreg,
3102 /* Set of ia64 gdb libunwind-frame callbacks and data for generic libunwind-frame code to use. */
3103 static struct libunwind_descr ia64_libunwind_descr =
3108 &ia64_unw_accessors,
3109 &ia64_unw_rse_accessors,
3112 #endif /* HAVE_LIBUNWIND_IA64_H */
3115 ia64_use_struct_convention (struct type *type)
3117 struct type *float_elt_type;
3119 /* Don't use the struct convention for anything but structure,
3120 union, or array types. */
3121 if (!(TYPE_CODE (type) == TYPE_CODE_STRUCT
3122 || TYPE_CODE (type) == TYPE_CODE_UNION
3123 || TYPE_CODE (type) == TYPE_CODE_ARRAY))
3126 /* HFAs are structures (or arrays) consisting entirely of floating
3127 point values of the same length. Up to 8 of these are returned
3128 in registers. Don't use the struct convention when this is the
3130 float_elt_type = is_float_or_hfa_type (type);
3131 if (float_elt_type != NULL
3132 && TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type) <= 8)
3135 /* Other structs of length 32 or less are returned in r8-r11.
3136 Don't use the struct convention for those either. */
3137 return TYPE_LENGTH (type) > 32;
3141 ia64_extract_return_value (struct type *type, struct regcache *regcache,
3144 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3145 struct type *float_elt_type;
3147 float_elt_type = is_float_or_hfa_type (type);
3148 if (float_elt_type != NULL)
3150 char from[MAX_REGISTER_SIZE];
3152 int regnum = IA64_FR8_REGNUM;
3153 int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type);
3157 regcache_cooked_read (regcache, regnum, from);
3158 convert_typed_floating (from, ia64_ext_type (gdbarch),
3159 (char *)valbuf + offset, float_elt_type);
3160 offset += TYPE_LENGTH (float_elt_type);
3168 int regnum = IA64_GR8_REGNUM;
3169 int reglen = TYPE_LENGTH (register_type (gdbarch, IA64_GR8_REGNUM));
3170 int n = TYPE_LENGTH (type) / reglen;
3171 int m = TYPE_LENGTH (type) % reglen;
3176 regcache_cooked_read_unsigned (regcache, regnum, &val);
3177 memcpy ((char *)valbuf + offset, &val, reglen);
3184 regcache_cooked_read_unsigned (regcache, regnum, &val);
3185 memcpy ((char *)valbuf + offset, &val, m);
3191 ia64_store_return_value (struct type *type, struct regcache *regcache,
3192 const gdb_byte *valbuf)
3194 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3195 struct type *float_elt_type;
3197 float_elt_type = is_float_or_hfa_type (type);
3198 if (float_elt_type != NULL)
3200 char to[MAX_REGISTER_SIZE];
3202 int regnum = IA64_FR8_REGNUM;
3203 int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type);
3207 convert_typed_floating ((char *)valbuf + offset, float_elt_type,
3208 to, ia64_ext_type (gdbarch));
3209 regcache_cooked_write (regcache, regnum, to);
3210 offset += TYPE_LENGTH (float_elt_type);
3218 int regnum = IA64_GR8_REGNUM;
3219 int reglen = TYPE_LENGTH (register_type (gdbarch, IA64_GR8_REGNUM));
3220 int n = TYPE_LENGTH (type) / reglen;
3221 int m = TYPE_LENGTH (type) % reglen;
3226 memcpy (&val, (char *)valbuf + offset, reglen);
3227 regcache_cooked_write_unsigned (regcache, regnum, val);
3234 memcpy (&val, (char *)valbuf + offset, m);
3235 regcache_cooked_write_unsigned (regcache, regnum, val);
3240 static enum return_value_convention
3241 ia64_return_value (struct gdbarch *gdbarch, struct type *func_type,
3242 struct type *valtype, struct regcache *regcache,
3243 gdb_byte *readbuf, const gdb_byte *writebuf)
3245 int struct_return = ia64_use_struct_convention (valtype);
3247 if (writebuf != NULL)
3249 gdb_assert (!struct_return);
3250 ia64_store_return_value (valtype, regcache, writebuf);
3253 if (readbuf != NULL)
3255 gdb_assert (!struct_return);
3256 ia64_extract_return_value (valtype, regcache, readbuf);
3260 return RETURN_VALUE_STRUCT_CONVENTION;
3262 return RETURN_VALUE_REGISTER_CONVENTION;
3266 is_float_or_hfa_type_recurse (struct type *t, struct type **etp)
3268 switch (TYPE_CODE (t))
3272 return TYPE_LENGTH (*etp) == TYPE_LENGTH (t);
3279 case TYPE_CODE_ARRAY:
3281 is_float_or_hfa_type_recurse (check_typedef (TYPE_TARGET_TYPE (t)),
3284 case TYPE_CODE_STRUCT:
3288 for (i = 0; i < TYPE_NFIELDS (t); i++)
3289 if (!is_float_or_hfa_type_recurse
3290 (check_typedef (TYPE_FIELD_TYPE (t, i)), etp))
3301 /* Determine if the given type is one of the floating point types or
3302 and HFA (which is a struct, array, or combination thereof whose
3303 bottom-most elements are all of the same floating point type). */
3305 static struct type *
3306 is_float_or_hfa_type (struct type *t)
3308 struct type *et = 0;
3310 return is_float_or_hfa_type_recurse (t, &et) ? et : 0;
3314 /* Return 1 if the alignment of T is such that the next even slot
3315 should be used. Return 0, if the next available slot should
3316 be used. (See section 8.5.1 of the IA-64 Software Conventions
3317 and Runtime manual). */
3320 slot_alignment_is_next_even (struct type *t)
3322 switch (TYPE_CODE (t))
3326 if (TYPE_LENGTH (t) > 8)
3330 case TYPE_CODE_ARRAY:
3332 slot_alignment_is_next_even (check_typedef (TYPE_TARGET_TYPE (t)));
3333 case TYPE_CODE_STRUCT:
3337 for (i = 0; i < TYPE_NFIELDS (t); i++)
3338 if (slot_alignment_is_next_even
3339 (check_typedef (TYPE_FIELD_TYPE (t, i))))
3348 /* Attempt to find (and return) the global pointer for the given
3351 This is a rather nasty bit of code searchs for the .dynamic section
3352 in the objfile corresponding to the pc of the function we're trying
3353 to call. Once it finds the addresses at which the .dynamic section
3354 lives in the child process, it scans the Elf64_Dyn entries for a
3355 DT_PLTGOT tag. If it finds one of these, the corresponding
3356 d_un.d_ptr value is the global pointer. */
3359 ia64_find_global_pointer (struct gdbarch *gdbarch, CORE_ADDR faddr)
3361 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3362 struct obj_section *faddr_sect;
3364 faddr_sect = find_pc_section (faddr);
3365 if (faddr_sect != NULL)
3367 struct obj_section *osect;
3369 ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
3371 if (strcmp (osect->the_bfd_section->name, ".dynamic") == 0)
3375 if (osect < faddr_sect->objfile->sections_end)
3377 CORE_ADDR addr, endaddr;
3379 addr = obj_section_addr (osect);
3380 endaddr = obj_section_endaddr (osect);
3382 while (addr < endaddr)
3388 status = target_read_memory (addr, buf, sizeof (buf));
3391 tag = extract_signed_integer (buf, sizeof (buf), byte_order);
3393 if (tag == DT_PLTGOT)
3395 CORE_ADDR global_pointer;
3397 status = target_read_memory (addr + 8, buf, sizeof (buf));
3400 global_pointer = extract_unsigned_integer (buf, sizeof (buf),
3404 return global_pointer;
3417 /* Given a function's address, attempt to find (and return) the
3418 corresponding (canonical) function descriptor. Return 0 if
3421 find_extant_func_descr (struct gdbarch *gdbarch, CORE_ADDR faddr)
3423 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3424 struct obj_section *faddr_sect;
3426 /* Return early if faddr is already a function descriptor. */
3427 faddr_sect = find_pc_section (faddr);
3428 if (faddr_sect && strcmp (faddr_sect->the_bfd_section->name, ".opd") == 0)
3431 if (faddr_sect != NULL)
3433 struct obj_section *osect;
3434 ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
3436 if (strcmp (osect->the_bfd_section->name, ".opd") == 0)
3440 if (osect < faddr_sect->objfile->sections_end)
3442 CORE_ADDR addr, endaddr;
3444 addr = obj_section_addr (osect);
3445 endaddr = obj_section_endaddr (osect);
3447 while (addr < endaddr)
3453 status = target_read_memory (addr, buf, sizeof (buf));
3456 faddr2 = extract_signed_integer (buf, sizeof (buf), byte_order);
3458 if (faddr == faddr2)
3468 /* Attempt to find a function descriptor corresponding to the
3469 given address. If none is found, construct one on the
3470 stack using the address at fdaptr. */
3473 find_func_descr (struct regcache *regcache, CORE_ADDR faddr, CORE_ADDR *fdaptr)
3475 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3476 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3479 fdesc = find_extant_func_descr (gdbarch, faddr);
3483 ULONGEST global_pointer;
3489 global_pointer = ia64_find_global_pointer (gdbarch, faddr);
3491 if (global_pointer == 0)
3492 regcache_cooked_read_unsigned (regcache,
3493 IA64_GR1_REGNUM, &global_pointer);
3495 store_unsigned_integer (buf, 8, byte_order, faddr);
3496 store_unsigned_integer (buf + 8, 8, byte_order, global_pointer);
3498 write_memory (fdesc, buf, 16);
3504 /* Use the following routine when printing out function pointers
3505 so the user can see the function address rather than just the
3506 function descriptor. */
3508 ia64_convert_from_func_ptr_addr (struct gdbarch *gdbarch, CORE_ADDR addr,
3509 struct target_ops *targ)
3511 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3512 struct obj_section *s;
3515 s = find_pc_section (addr);
3517 /* check if ADDR points to a function descriptor. */
3518 if (s && strcmp (s->the_bfd_section->name, ".opd") == 0)
3519 return read_memory_unsigned_integer (addr, 8, byte_order);
3521 /* Normally, functions live inside a section that is executable.
3522 So, if ADDR points to a non-executable section, then treat it
3523 as a function descriptor and return the target address iff
3524 the target address itself points to a section that is executable.
3525 Check first the memory of the whole length of 8 bytes is readable. */
3526 if (s && (s->the_bfd_section->flags & SEC_CODE) == 0
3527 && target_read_memory (addr, buf, 8) == 0)
3529 CORE_ADDR pc = extract_unsigned_integer (buf, 8, byte_order);
3530 struct obj_section *pc_section = find_pc_section (pc);
3532 if (pc_section && (pc_section->the_bfd_section->flags & SEC_CODE))
3536 /* There are also descriptors embedded in vtables. */
3539 struct minimal_symbol *minsym;
3541 minsym = lookup_minimal_symbol_by_pc (addr);
3543 if (minsym && is_vtable_name (SYMBOL_LINKAGE_NAME (minsym)))
3544 return read_memory_unsigned_integer (addr, 8, byte_order);
3551 ia64_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp)
3557 ia64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
3558 struct regcache *regcache, CORE_ADDR bp_addr,
3559 int nargs, struct value **args, CORE_ADDR sp,
3560 int struct_return, CORE_ADDR struct_addr)
3562 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3567 int nslots, rseslots, memslots, slotnum, nfuncargs;
3569 ULONGEST bsp, cfm, pfs, new_bsp;
3570 CORE_ADDR funcdescaddr, pc, global_pointer;
3571 CORE_ADDR func_addr = find_function_addr (function, NULL);
3575 /* Count the number of slots needed for the arguments. */
3576 for (argno = 0; argno < nargs; argno++)
3579 type = check_typedef (value_type (arg));
3580 len = TYPE_LENGTH (type);
3582 if ((nslots & 1) && slot_alignment_is_next_even (type))
3585 if (TYPE_CODE (type) == TYPE_CODE_FUNC)
3588 nslots += (len + 7) / 8;
3591 /* Divvy up the slots between the RSE and the memory stack. */
3592 rseslots = (nslots > 8) ? 8 : nslots;
3593 memslots = nslots - rseslots;
3595 /* Allocate a new RSE frame. */
3596 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
3598 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
3599 new_bsp = rse_address_add (bsp, rseslots);
3600 regcache_cooked_write_unsigned (regcache, IA64_BSP_REGNUM, new_bsp);
3602 regcache_cooked_read_unsigned (regcache, IA64_PFS_REGNUM, &pfs);
3603 pfs &= 0xc000000000000000LL;
3604 pfs |= (cfm & 0xffffffffffffLL);
3605 regcache_cooked_write_unsigned (regcache, IA64_PFS_REGNUM, pfs);
3607 cfm &= 0xc000000000000000LL;
3609 regcache_cooked_write_unsigned (regcache, IA64_CFM_REGNUM, cfm);
3611 /* We will attempt to find function descriptors in the .opd segment,
3612 but if we can't we'll construct them ourselves. That being the
3613 case, we'll need to reserve space on the stack for them. */
3614 funcdescaddr = sp - nfuncargs * 16;
3615 funcdescaddr &= ~0xfLL;
3617 /* Adjust the stack pointer to it's new value. The calling conventions
3618 require us to have 16 bytes of scratch, plus whatever space is
3619 necessary for the memory slots and our function descriptors. */
3620 sp = sp - 16 - (memslots + nfuncargs) * 8;
3621 sp &= ~0xfLL; /* Maintain 16 byte alignment. */
3623 /* Place the arguments where they belong. The arguments will be
3624 either placed in the RSE backing store or on the memory stack.
3625 In addition, floating point arguments or HFAs are placed in
3626 floating point registers. */
3628 floatreg = IA64_FR8_REGNUM;
3629 for (argno = 0; argno < nargs; argno++)
3631 struct type *float_elt_type;
3634 type = check_typedef (value_type (arg));
3635 len = TYPE_LENGTH (type);
3637 /* Special handling for function parameters. */
3639 && TYPE_CODE (type) == TYPE_CODE_PTR
3640 && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC)
3643 ULONGEST faddr = extract_unsigned_integer (value_contents (arg),
3645 store_unsigned_integer (val_buf, 8, byte_order,
3646 find_func_descr (regcache, faddr,
3648 if (slotnum < rseslots)
3649 write_memory (rse_address_add (bsp, slotnum), val_buf, 8);
3651 write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8);
3658 /* Skip odd slot if necessary... */
3659 if ((slotnum & 1) && slot_alignment_is_next_even (type))
3667 memset (val_buf, 0, 8);
3668 memcpy (val_buf, value_contents (arg) + argoffset, (len > 8) ? 8 : len);
3670 if (slotnum < rseslots)
3671 write_memory (rse_address_add (bsp, slotnum), val_buf, 8);
3673 write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8);
3680 /* Handle floating point types (including HFAs). */
3681 float_elt_type = is_float_or_hfa_type (type);
3682 if (float_elt_type != NULL)
3685 len = TYPE_LENGTH (type);
3686 while (len > 0 && floatreg < IA64_FR16_REGNUM)
3688 char to[MAX_REGISTER_SIZE];
3689 convert_typed_floating (value_contents (arg) + argoffset, float_elt_type,
3690 to, ia64_ext_type (gdbarch));
3691 regcache_cooked_write (regcache, floatreg, (void *)to);
3693 argoffset += TYPE_LENGTH (float_elt_type);
3694 len -= TYPE_LENGTH (float_elt_type);
3699 /* Store the struct return value in r8 if necessary. */
3702 regcache_cooked_write_unsigned (regcache, IA64_GR8_REGNUM, (ULONGEST)struct_addr);
3705 global_pointer = ia64_find_global_pointer (gdbarch, func_addr);
3707 if (global_pointer != 0)
3708 regcache_cooked_write_unsigned (regcache, IA64_GR1_REGNUM, global_pointer);
3710 regcache_cooked_write_unsigned (regcache, IA64_BR0_REGNUM, bp_addr);
3712 regcache_cooked_write_unsigned (regcache, sp_regnum, sp);
3717 static struct frame_id
3718 ia64_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
3720 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3724 get_frame_register (this_frame, sp_regnum, buf);
3725 sp = extract_unsigned_integer (buf, 8, byte_order);
3727 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
3728 bsp = extract_unsigned_integer (buf, 8, byte_order);
3730 if (gdbarch_debug >= 1)
3731 fprintf_unfiltered (gdb_stdlog,
3732 "dummy frame id: code %s, stack %s, special %s\n",
3733 paddress (gdbarch, get_frame_pc (this_frame)),
3734 paddress (gdbarch, sp), paddress (gdbarch, bsp));
3736 return frame_id_build_special (sp, get_frame_pc (this_frame), bsp);
3740 ia64_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
3742 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3744 CORE_ADDR ip, psr, pc;
3746 frame_unwind_register (next_frame, IA64_IP_REGNUM, buf);
3747 ip = extract_unsigned_integer (buf, 8, byte_order);
3748 frame_unwind_register (next_frame, IA64_PSR_REGNUM, buf);
3749 psr = extract_unsigned_integer (buf, 8, byte_order);
3751 pc = (ip & ~0xf) | ((psr >> 41) & 3);
3756 ia64_print_insn (bfd_vma memaddr, struct disassemble_info *info)
3758 info->bytes_per_line = SLOT_MULTIPLIER;
3759 return print_insn_ia64 (memaddr, info);
3762 static struct gdbarch *
3763 ia64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
3765 struct gdbarch *gdbarch;
3766 struct gdbarch_tdep *tdep;
3768 /* If there is already a candidate, use it. */
3769 arches = gdbarch_list_lookup_by_info (arches, &info);
3771 return arches->gdbarch;
3773 tdep = xzalloc (sizeof (struct gdbarch_tdep));
3774 gdbarch = gdbarch_alloc (&info, tdep);
3776 /* According to the ia64 specs, instructions that store long double
3777 floats in memory use a long-double format different than that
3778 used in the floating registers. The memory format matches the
3779 x86 extended float format which is 80 bits. An OS may choose to
3780 use this format (e.g. GNU/Linux) or choose to use a different
3781 format for storing long doubles (e.g. HPUX). In the latter case,
3782 the setting of the format may be moved/overridden in an
3783 OS-specific tdep file. */
3784 set_gdbarch_long_double_format (gdbarch, floatformats_i387_ext);
3786 set_gdbarch_short_bit (gdbarch, 16);
3787 set_gdbarch_int_bit (gdbarch, 32);
3788 set_gdbarch_long_bit (gdbarch, 64);
3789 set_gdbarch_long_long_bit (gdbarch, 64);
3790 set_gdbarch_float_bit (gdbarch, 32);
3791 set_gdbarch_double_bit (gdbarch, 64);
3792 set_gdbarch_long_double_bit (gdbarch, 128);
3793 set_gdbarch_ptr_bit (gdbarch, 64);
3795 set_gdbarch_num_regs (gdbarch, NUM_IA64_RAW_REGS);
3796 set_gdbarch_num_pseudo_regs (gdbarch, LAST_PSEUDO_REGNUM - FIRST_PSEUDO_REGNUM);
3797 set_gdbarch_sp_regnum (gdbarch, sp_regnum);
3798 set_gdbarch_fp0_regnum (gdbarch, IA64_FR0_REGNUM);
3800 set_gdbarch_register_name (gdbarch, ia64_register_name);
3801 set_gdbarch_register_type (gdbarch, ia64_register_type);
3803 set_gdbarch_pseudo_register_read (gdbarch, ia64_pseudo_register_read);
3804 set_gdbarch_pseudo_register_write (gdbarch, ia64_pseudo_register_write);
3805 set_gdbarch_dwarf2_reg_to_regnum (gdbarch, ia64_dwarf_reg_to_regnum);
3806 set_gdbarch_register_reggroup_p (gdbarch, ia64_register_reggroup_p);
3807 set_gdbarch_convert_register_p (gdbarch, ia64_convert_register_p);
3808 set_gdbarch_register_to_value (gdbarch, ia64_register_to_value);
3809 set_gdbarch_value_to_register (gdbarch, ia64_value_to_register);
3811 set_gdbarch_skip_prologue (gdbarch, ia64_skip_prologue);
3813 set_gdbarch_return_value (gdbarch, ia64_return_value);
3815 set_gdbarch_memory_insert_breakpoint (gdbarch, ia64_memory_insert_breakpoint);
3816 set_gdbarch_memory_remove_breakpoint (gdbarch, ia64_memory_remove_breakpoint);
3817 set_gdbarch_breakpoint_from_pc (gdbarch, ia64_breakpoint_from_pc);
3818 set_gdbarch_read_pc (gdbarch, ia64_read_pc);
3819 set_gdbarch_write_pc (gdbarch, ia64_write_pc);
3821 /* Settings for calling functions in the inferior. */
3822 set_gdbarch_push_dummy_call (gdbarch, ia64_push_dummy_call);
3823 set_gdbarch_frame_align (gdbarch, ia64_frame_align);
3824 set_gdbarch_dummy_id (gdbarch, ia64_dummy_id);
3826 set_gdbarch_unwind_pc (gdbarch, ia64_unwind_pc);
3827 #ifdef HAVE_LIBUNWIND_IA64_H
3828 frame_unwind_append_unwinder (gdbarch,
3829 &ia64_libunwind_sigtramp_frame_unwind);
3830 frame_unwind_append_unwinder (gdbarch, &ia64_libunwind_frame_unwind);
3831 frame_unwind_append_unwinder (gdbarch, &ia64_sigtramp_frame_unwind);
3832 libunwind_frame_set_descr (gdbarch, &ia64_libunwind_descr);
3834 frame_unwind_append_unwinder (gdbarch, &ia64_sigtramp_frame_unwind);
3836 frame_unwind_append_unwinder (gdbarch, &ia64_frame_unwind);
3837 frame_base_set_default (gdbarch, &ia64_frame_base);
3839 /* Settings that should be unnecessary. */
3840 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
3842 set_gdbarch_print_insn (gdbarch, ia64_print_insn);
3843 set_gdbarch_convert_from_func_ptr_addr (gdbarch, ia64_convert_from_func_ptr_addr);
3845 /* The virtual table contains 16-byte descriptors, not pointers to
3847 set_gdbarch_vtable_function_descriptors (gdbarch, 1);
3849 /* Hook in ABI-specific overrides, if they have been registered. */
3850 gdbarch_init_osabi (info, gdbarch);
3855 extern initialize_file_ftype _initialize_ia64_tdep; /* -Wmissing-prototypes */
3858 _initialize_ia64_tdep (void)
3860 gdbarch_register (bfd_arch_ia64, ia64_gdbarch_init, NULL);