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 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 static gdbarch_init_ftype ia64_gdbarch_init;
115 static gdbarch_register_name_ftype ia64_register_name;
116 static gdbarch_register_type_ftype ia64_register_type;
117 static gdbarch_breakpoint_from_pc_ftype ia64_breakpoint_from_pc;
118 static gdbarch_skip_prologue_ftype ia64_skip_prologue;
119 static struct type *is_float_or_hfa_type (struct type *t);
120 static CORE_ADDR ia64_find_global_pointer (CORE_ADDR faddr);
122 static struct type *builtin_type_ia64_ext;
124 #define NUM_IA64_RAW_REGS 462
126 static int sp_regnum = IA64_GR12_REGNUM;
127 static int fp_regnum = IA64_VFP_REGNUM;
128 static int lr_regnum = IA64_VRAP_REGNUM;
130 /* NOTE: we treat the register stack registers r32-r127 as pseudo-registers because
131 they may not be accessible via the ptrace register get/set interfaces. */
132 enum pseudo_regs { FIRST_PSEUDO_REGNUM = NUM_IA64_RAW_REGS, VBOF_REGNUM = IA64_NAT127_REGNUM + 1, V32_REGNUM,
133 V127_REGNUM = V32_REGNUM + 95,
134 VP0_REGNUM, VP16_REGNUM = VP0_REGNUM + 16, VP63_REGNUM = VP0_REGNUM + 63, LAST_PSEUDO_REGNUM };
136 /* Array of register names; There should be ia64_num_regs strings in
139 static char *ia64_register_names[] =
140 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
141 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
142 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
143 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
144 "", "", "", "", "", "", "", "",
145 "", "", "", "", "", "", "", "",
146 "", "", "", "", "", "", "", "",
147 "", "", "", "", "", "", "", "",
148 "", "", "", "", "", "", "", "",
149 "", "", "", "", "", "", "", "",
150 "", "", "", "", "", "", "", "",
151 "", "", "", "", "", "", "", "",
152 "", "", "", "", "", "", "", "",
153 "", "", "", "", "", "", "", "",
154 "", "", "", "", "", "", "", "",
155 "", "", "", "", "", "", "", "",
157 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
158 "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
159 "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
160 "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
161 "f32", "f33", "f34", "f35", "f36", "f37", "f38", "f39",
162 "f40", "f41", "f42", "f43", "f44", "f45", "f46", "f47",
163 "f48", "f49", "f50", "f51", "f52", "f53", "f54", "f55",
164 "f56", "f57", "f58", "f59", "f60", "f61", "f62", "f63",
165 "f64", "f65", "f66", "f67", "f68", "f69", "f70", "f71",
166 "f72", "f73", "f74", "f75", "f76", "f77", "f78", "f79",
167 "f80", "f81", "f82", "f83", "f84", "f85", "f86", "f87",
168 "f88", "f89", "f90", "f91", "f92", "f93", "f94", "f95",
169 "f96", "f97", "f98", "f99", "f100", "f101", "f102", "f103",
170 "f104", "f105", "f106", "f107", "f108", "f109", "f110", "f111",
171 "f112", "f113", "f114", "f115", "f116", "f117", "f118", "f119",
172 "f120", "f121", "f122", "f123", "f124", "f125", "f126", "f127",
174 "", "", "", "", "", "", "", "",
175 "", "", "", "", "", "", "", "",
176 "", "", "", "", "", "", "", "",
177 "", "", "", "", "", "", "", "",
178 "", "", "", "", "", "", "", "",
179 "", "", "", "", "", "", "", "",
180 "", "", "", "", "", "", "", "",
181 "", "", "", "", "", "", "", "",
183 "b0", "b1", "b2", "b3", "b4", "b5", "b6", "b7",
187 "pr", "ip", "psr", "cfm",
189 "kr0", "kr1", "kr2", "kr3", "kr4", "kr5", "kr6", "kr7",
190 "", "", "", "", "", "", "", "",
191 "rsc", "bsp", "bspstore", "rnat",
193 "eflag", "csd", "ssd", "cflg", "fsr", "fir", "fdr", "",
194 "ccv", "", "", "", "unat", "", "", "",
195 "fpsr", "", "", "", "itc",
196 "", "", "", "", "", "", "", "", "", "",
197 "", "", "", "", "", "", "", "", "",
199 "", "", "", "", "", "", "", "", "", "",
200 "", "", "", "", "", "", "", "", "", "",
201 "", "", "", "", "", "", "", "", "", "",
202 "", "", "", "", "", "", "", "", "", "",
203 "", "", "", "", "", "", "", "", "", "",
204 "", "", "", "", "", "", "", "", "", "",
206 "nat0", "nat1", "nat2", "nat3", "nat4", "nat5", "nat6", "nat7",
207 "nat8", "nat9", "nat10", "nat11", "nat12", "nat13", "nat14", "nat15",
208 "nat16", "nat17", "nat18", "nat19", "nat20", "nat21", "nat22", "nat23",
209 "nat24", "nat25", "nat26", "nat27", "nat28", "nat29", "nat30", "nat31",
210 "nat32", "nat33", "nat34", "nat35", "nat36", "nat37", "nat38", "nat39",
211 "nat40", "nat41", "nat42", "nat43", "nat44", "nat45", "nat46", "nat47",
212 "nat48", "nat49", "nat50", "nat51", "nat52", "nat53", "nat54", "nat55",
213 "nat56", "nat57", "nat58", "nat59", "nat60", "nat61", "nat62", "nat63",
214 "nat64", "nat65", "nat66", "nat67", "nat68", "nat69", "nat70", "nat71",
215 "nat72", "nat73", "nat74", "nat75", "nat76", "nat77", "nat78", "nat79",
216 "nat80", "nat81", "nat82", "nat83", "nat84", "nat85", "nat86", "nat87",
217 "nat88", "nat89", "nat90", "nat91", "nat92", "nat93", "nat94", "nat95",
218 "nat96", "nat97", "nat98", "nat99", "nat100","nat101","nat102","nat103",
219 "nat104","nat105","nat106","nat107","nat108","nat109","nat110","nat111",
220 "nat112","nat113","nat114","nat115","nat116","nat117","nat118","nat119",
221 "nat120","nat121","nat122","nat123","nat124","nat125","nat126","nat127",
225 "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39",
226 "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47",
227 "r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55",
228 "r56", "r57", "r58", "r59", "r60", "r61", "r62", "r63",
229 "r64", "r65", "r66", "r67", "r68", "r69", "r70", "r71",
230 "r72", "r73", "r74", "r75", "r76", "r77", "r78", "r79",
231 "r80", "r81", "r82", "r83", "r84", "r85", "r86", "r87",
232 "r88", "r89", "r90", "r91", "r92", "r93", "r94", "r95",
233 "r96", "r97", "r98", "r99", "r100", "r101", "r102", "r103",
234 "r104", "r105", "r106", "r107", "r108", "r109", "r110", "r111",
235 "r112", "r113", "r114", "r115", "r116", "r117", "r118", "r119",
236 "r120", "r121", "r122", "r123", "r124", "r125", "r126", "r127",
238 "p0", "p1", "p2", "p3", "p4", "p5", "p6", "p7",
239 "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15",
240 "p16", "p17", "p18", "p19", "p20", "p21", "p22", "p23",
241 "p24", "p25", "p26", "p27", "p28", "p29", "p30", "p31",
242 "p32", "p33", "p34", "p35", "p36", "p37", "p38", "p39",
243 "p40", "p41", "p42", "p43", "p44", "p45", "p46", "p47",
244 "p48", "p49", "p50", "p51", "p52", "p53", "p54", "p55",
245 "p56", "p57", "p58", "p59", "p60", "p61", "p62", "p63",
248 struct ia64_frame_cache
250 CORE_ADDR base; /* frame pointer base for frame */
251 CORE_ADDR pc; /* function start pc for frame */
252 CORE_ADDR saved_sp; /* stack pointer for frame */
253 CORE_ADDR bsp; /* points at r32 for the current frame */
254 CORE_ADDR cfm; /* cfm value for current frame */
255 CORE_ADDR prev_cfm; /* cfm value for previous frame */
257 int sof; /* Size of frame (decoded from cfm value) */
258 int sol; /* Size of locals (decoded from cfm value) */
259 int sor; /* Number of rotating registers. (decoded from cfm value) */
260 CORE_ADDR after_prologue;
261 /* Address of first instruction after the last
262 prologue instruction; Note that there may
263 be instructions from the function's body
264 intermingled with the prologue. */
265 int mem_stack_frame_size;
266 /* Size of the memory stack frame (may be zero),
267 or -1 if it has not been determined yet. */
268 int fp_reg; /* Register number (if any) used a frame pointer
269 for this frame. 0 if no register is being used
270 as the frame pointer. */
272 /* Saved registers. */
273 CORE_ADDR saved_regs[NUM_IA64_RAW_REGS];
278 ia64_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
279 struct reggroup *group)
284 if (group == all_reggroup)
286 vector_p = TYPE_VECTOR (register_type (gdbarch, regnum));
287 float_p = TYPE_CODE (register_type (gdbarch, regnum)) == TYPE_CODE_FLT;
288 raw_p = regnum < NUM_IA64_RAW_REGS;
289 if (group == float_reggroup)
291 if (group == vector_reggroup)
293 if (group == general_reggroup)
294 return (!vector_p && !float_p);
295 if (group == save_reggroup || group == restore_reggroup)
301 ia64_register_name (struct gdbarch *gdbarch, int reg)
303 return ia64_register_names[reg];
307 ia64_register_type (struct gdbarch *arch, int reg)
309 if (reg >= IA64_FR0_REGNUM && reg <= IA64_FR127_REGNUM)
310 return builtin_type_ia64_ext;
312 return builtin_type_long;
316 ia64_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg)
318 if (reg >= IA64_GR32_REGNUM && reg <= IA64_GR127_REGNUM)
319 return V32_REGNUM + (reg - IA64_GR32_REGNUM);
324 floatformat_valid (const struct floatformat *fmt, const void *from)
329 const struct floatformat floatformat_ia64_ext =
331 floatformat_little, 82, 0, 1, 17, 65535, 0x1ffff, 18, 64,
332 floatformat_intbit_yes, "floatformat_ia64_ext", floatformat_valid, NULL
335 const struct floatformat *floatformats_ia64_ext[2] =
337 &floatformat_ia64_ext,
338 &floatformat_ia64_ext
342 /* Extract ``len'' bits from an instruction bundle starting at
346 extract_bit_field (const char *bundle, int from, int len)
348 long long result = 0LL;
350 int from_byte = from / 8;
351 int to_byte = to / 8;
352 unsigned char *b = (unsigned char *) bundle;
358 if (from_byte == to_byte)
359 c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8);
360 result = c >> (from % 8);
361 lshift = 8 - (from % 8);
363 for (i = from_byte+1; i < to_byte; i++)
365 result |= ((long long) b[i]) << lshift;
369 if (from_byte < to_byte && (to % 8 != 0))
372 c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8);
373 result |= ((long long) c) << lshift;
379 /* Replace the specified bits in an instruction bundle */
382 replace_bit_field (char *bundle, long long val, int from, int len)
385 int from_byte = from / 8;
386 int to_byte = to / 8;
387 unsigned char *b = (unsigned char *) bundle;
390 if (from_byte == to_byte)
392 unsigned char left, right;
394 left = (c >> (to % 8)) << (to % 8);
395 right = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8);
396 c = (unsigned char) (val & 0xff);
397 c = (unsigned char) (c << (from % 8 + 8 - to % 8)) >> (8 - to % 8);
405 c = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8);
406 c = c | (val << (from % 8));
408 val >>= 8 - from % 8;
410 for (i = from_byte+1; i < to_byte; i++)
419 unsigned char cv = (unsigned char) val;
421 c = c >> (to % 8) << (to % 8);
422 c |= ((unsigned char) (cv << (8 - to % 8))) >> (8 - to % 8);
428 /* Return the contents of slot N (for N = 0, 1, or 2) in
429 and instruction bundle */
432 slotN_contents (char *bundle, int slotnum)
434 return extract_bit_field (bundle, 5+41*slotnum, 41);
437 /* Store an instruction in an instruction bundle */
440 replace_slotN_contents (char *bundle, long long instr, int slotnum)
442 replace_bit_field (bundle, instr, 5+41*slotnum, 41);
445 static enum instruction_type template_encoding_table[32][3] =
447 { M, I, I }, /* 00 */
448 { M, I, I }, /* 01 */
449 { M, I, I }, /* 02 */
450 { M, I, I }, /* 03 */
451 { M, L, X }, /* 04 */
452 { M, L, X }, /* 05 */
453 { undefined, undefined, undefined }, /* 06 */
454 { undefined, undefined, undefined }, /* 07 */
455 { M, M, I }, /* 08 */
456 { M, M, I }, /* 09 */
457 { M, M, I }, /* 0A */
458 { M, M, I }, /* 0B */
459 { M, F, I }, /* 0C */
460 { M, F, I }, /* 0D */
461 { M, M, F }, /* 0E */
462 { M, M, F }, /* 0F */
463 { M, I, B }, /* 10 */
464 { M, I, B }, /* 11 */
465 { M, B, B }, /* 12 */
466 { M, B, B }, /* 13 */
467 { undefined, undefined, undefined }, /* 14 */
468 { undefined, undefined, undefined }, /* 15 */
469 { B, B, B }, /* 16 */
470 { B, B, B }, /* 17 */
471 { M, M, B }, /* 18 */
472 { M, M, B }, /* 19 */
473 { undefined, undefined, undefined }, /* 1A */
474 { undefined, undefined, undefined }, /* 1B */
475 { M, F, B }, /* 1C */
476 { M, F, B }, /* 1D */
477 { undefined, undefined, undefined }, /* 1E */
478 { undefined, undefined, undefined }, /* 1F */
481 /* Fetch and (partially) decode an instruction at ADDR and return the
482 address of the next instruction to fetch. */
485 fetch_instruction (CORE_ADDR addr, instruction_type *it, long long *instr)
487 char bundle[BUNDLE_LEN];
488 int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER;
492 /* Warn about slot numbers greater than 2. We used to generate
493 an error here on the assumption that the user entered an invalid
494 address. But, sometimes GDB itself requests an invalid address.
495 This can (easily) happen when execution stops in a function for
496 which there are no symbols. The prologue scanner will attempt to
497 find the beginning of the function - if the nearest symbol
498 happens to not be aligned on a bundle boundary (16 bytes), the
499 resulting starting address will cause GDB to think that the slot
502 So we warn about it and set the slot number to zero. It is
503 not necessarily a fatal condition, particularly if debugging
504 at the assembly language level. */
507 warning (_("Can't fetch instructions for slot numbers greater than 2.\n"
508 "Using slot 0 instead"));
514 val = target_read_memory (addr, bundle, BUNDLE_LEN);
519 *instr = slotN_contents (bundle, slotnum);
520 template = extract_bit_field (bundle, 0, 5);
521 *it = template_encoding_table[(int)template][slotnum];
523 if (slotnum == 2 || (slotnum == 1 && *it == L))
526 addr += (slotnum + 1) * SLOT_MULTIPLIER;
531 /* There are 5 different break instructions (break.i, break.b,
532 break.m, break.f, and break.x), but they all have the same
533 encoding. (The five bit template in the low five bits of the
534 instruction bundle distinguishes one from another.)
536 The runtime architecture manual specifies that break instructions
537 used for debugging purposes must have the upper two bits of the 21
538 bit immediate set to a 0 and a 1 respectively. A breakpoint
539 instruction encodes the most significant bit of its 21 bit
540 immediate at bit 36 of the 41 bit instruction. The penultimate msb
541 is at bit 25 which leads to the pattern below.
543 Originally, I had this set up to do, e.g, a "break.i 0x80000" But
544 it turns out that 0x80000 was used as the syscall break in the early
545 simulators. So I changed the pattern slightly to do "break.i 0x080001"
546 instead. But that didn't work either (I later found out that this
547 pattern was used by the simulator that I was using.) So I ended up
548 using the pattern seen below. */
551 #define IA64_BREAKPOINT 0x00002000040LL
553 #define IA64_BREAKPOINT 0x00003333300LL
556 ia64_memory_insert_breakpoint (struct gdbarch *gdbarch,
557 struct bp_target_info *bp_tgt)
559 CORE_ADDR addr = bp_tgt->placed_address;
560 char bundle[BUNDLE_LEN];
561 int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER;
567 error (_("Can't insert breakpoint for slot numbers greater than 2."));
571 val = target_read_memory (addr, bundle, BUNDLE_LEN);
573 /* Check for L type instruction in 2nd slot, if present then
574 bump up the slot number to the 3rd slot */
575 template = extract_bit_field (bundle, 0, 5);
576 if (slotnum == 1 && template_encoding_table[template][1] == L)
581 instr = slotN_contents (bundle, slotnum);
582 memcpy (bp_tgt->shadow_contents, &instr, sizeof (instr));
583 bp_tgt->placed_size = bp_tgt->shadow_len = sizeof (instr);
584 replace_slotN_contents (bundle, IA64_BREAKPOINT, slotnum);
586 target_write_memory (addr, bundle, BUNDLE_LEN);
592 ia64_memory_remove_breakpoint (struct gdbarch *gdbarch,
593 struct bp_target_info *bp_tgt)
595 CORE_ADDR addr = bp_tgt->placed_address;
596 char bundle[BUNDLE_LEN];
597 int slotnum = (addr & 0x0f) / SLOT_MULTIPLIER;
601 struct cleanup *cleanup;
605 /* Disable the automatic memory restoration from breakpoints while
606 we read our instruction bundle. Otherwise, the general restoration
607 mechanism kicks in and ends up corrupting our bundle, because it
608 is not aware of the concept of instruction bundles. */
609 cleanup = make_show_memory_breakpoints_cleanup (1);
610 val = target_read_memory (addr, bundle, BUNDLE_LEN);
612 /* Check for L type instruction in 2nd slot, if present then
613 bump up the slot number to the 3rd slot */
614 template = extract_bit_field (bundle, 0, 5);
615 if (slotnum == 1 && template_encoding_table[template][1] == L)
620 memcpy (&instr, bp_tgt->shadow_contents, sizeof instr);
621 replace_slotN_contents (bundle, instr, slotnum);
623 target_write_memory (addr, bundle, BUNDLE_LEN);
625 do_cleanups (cleanup);
629 /* We don't really want to use this, but remote.c needs to call it in order
630 to figure out if Z-packets are supported or not. Oh, well. */
631 const unsigned char *
632 ia64_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr, int *lenptr)
634 static unsigned char breakpoint[] =
635 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
636 *lenptr = sizeof (breakpoint);
644 ia64_read_pc (struct regcache *regcache)
646 ULONGEST psr_value, pc_value;
649 regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr_value);
650 regcache_cooked_read_unsigned (regcache, IA64_IP_REGNUM, &pc_value);
651 slot_num = (psr_value >> 41) & 3;
653 return pc_value | (slot_num * SLOT_MULTIPLIER);
657 ia64_write_pc (struct regcache *regcache, CORE_ADDR new_pc)
659 int slot_num = (int) (new_pc & 0xf) / SLOT_MULTIPLIER;
662 regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr_value);
663 psr_value &= ~(3LL << 41);
664 psr_value |= (ULONGEST)(slot_num & 0x3) << 41;
668 regcache_cooked_write_unsigned (regcache, IA64_PSR_REGNUM, psr_value);
669 regcache_cooked_write_unsigned (regcache, IA64_IP_REGNUM, new_pc);
672 #define IS_NaT_COLLECTION_ADDR(addr) ((((addr) >> 3) & 0x3f) == 0x3f)
674 /* Returns the address of the slot that's NSLOTS slots away from
675 the address ADDR. NSLOTS may be positive or negative. */
677 rse_address_add(CORE_ADDR addr, int nslots)
680 int mandatory_nat_slots = nslots / 63;
681 int direction = nslots < 0 ? -1 : 1;
683 new_addr = addr + 8 * (nslots + mandatory_nat_slots);
685 if ((new_addr >> 9) != ((addr + 8 * 64 * mandatory_nat_slots) >> 9))
686 new_addr += 8 * direction;
688 if (IS_NaT_COLLECTION_ADDR(new_addr))
689 new_addr += 8 * direction;
695 ia64_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
696 int regnum, gdb_byte *buf)
698 if (regnum >= V32_REGNUM && regnum <= V127_REGNUM)
700 #ifdef HAVE_LIBUNWIND_IA64_H
701 /* First try and use the libunwind special reg accessor, otherwise fallback to
703 if (!libunwind_is_initialized ()
704 || libunwind_get_reg_special (gdbarch, regcache, regnum, buf) != 0)
707 /* The fallback position is to assume that r32-r127 are found sequentially
708 in memory starting at $bof. This isn't always true, but without libunwind,
709 this is the best we can do. */
713 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
714 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
716 /* The bsp points at the end of the register frame so we
717 subtract the size of frame from it to get start of register frame. */
718 bsp = rse_address_add (bsp, -(cfm & 0x7f));
720 if ((cfm & 0x7f) > regnum - V32_REGNUM)
722 ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
723 reg = read_memory_integer ((CORE_ADDR)reg_addr, 8);
724 store_unsigned_integer (buf, register_size (gdbarch, regnum), reg);
727 store_unsigned_integer (buf, register_size (gdbarch, regnum), 0);
730 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
734 regcache_cooked_read_unsigned (regcache, IA64_UNAT_REGNUM, &unat);
735 unatN_val = (unat & (1LL << (regnum - IA64_NAT0_REGNUM))) != 0;
736 store_unsigned_integer (buf, register_size (gdbarch, regnum), unatN_val);
738 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
740 ULONGEST natN_val = 0;
743 CORE_ADDR gr_addr = 0;
744 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
745 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
747 /* The bsp points at the end of the register frame so we
748 subtract the size of frame from it to get start of register frame. */
749 bsp = rse_address_add (bsp, -(cfm & 0x7f));
751 if ((cfm & 0x7f) > regnum - V32_REGNUM)
752 gr_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
756 /* Compute address of nat collection bits. */
757 CORE_ADDR nat_addr = gr_addr | 0x1f8;
758 CORE_ADDR nat_collection;
760 /* If our nat collection address is bigger than bsp, we have to get
761 the nat collection from rnat. Otherwise, we fetch the nat
762 collection from the computed address. */
764 regcache_cooked_read_unsigned (regcache, IA64_RNAT_REGNUM, &nat_collection);
766 nat_collection = read_memory_integer (nat_addr, 8);
767 nat_bit = (gr_addr >> 3) & 0x3f;
768 natN_val = (nat_collection >> nat_bit) & 1;
771 store_unsigned_integer (buf, register_size (gdbarch, regnum), natN_val);
773 else if (regnum == VBOF_REGNUM)
775 /* A virtual register frame start is provided for user convenience.
776 It can be calculated as the bsp - sof (sizeof frame). */
780 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
781 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
783 /* The bsp points at the end of the register frame so we
784 subtract the size of frame from it to get beginning of frame. */
785 vbsp = rse_address_add (bsp, -(cfm & 0x7f));
786 store_unsigned_integer (buf, register_size (gdbarch, regnum), vbsp);
788 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
794 regcache_cooked_read_unsigned (regcache, IA64_PR_REGNUM, &pr);
795 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
797 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
799 /* Fetch predicate register rename base from current frame
800 marker for this frame. */
801 int rrb_pr = (cfm >> 32) & 0x3f;
803 /* Adjust the register number to account for register rotation. */
805 + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
807 prN_val = (pr & (1LL << (regnum - VP0_REGNUM))) != 0;
808 store_unsigned_integer (buf, register_size (gdbarch, regnum), prN_val);
811 memset (buf, 0, register_size (gdbarch, regnum));
815 ia64_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
816 int regnum, const gdb_byte *buf)
818 if (regnum >= V32_REGNUM && regnum <= V127_REGNUM)
823 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
824 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
826 bsp = rse_address_add (bsp, -(cfm & 0x7f));
828 if ((cfm & 0x7f) > regnum - V32_REGNUM)
830 ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
831 write_memory (reg_addr, (void *)buf, 8);
834 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
836 ULONGEST unatN_val, unat, unatN_mask;
837 regcache_cooked_read_unsigned (regcache, IA64_UNAT_REGNUM, &unat);
838 unatN_val = extract_unsigned_integer (buf, register_size (gdbarch, regnum));
839 unatN_mask = (1LL << (regnum - IA64_NAT0_REGNUM));
842 else if (unatN_val == 1)
844 regcache_cooked_write_unsigned (regcache, IA64_UNAT_REGNUM, unat);
846 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
851 CORE_ADDR gr_addr = 0;
852 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
853 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
855 /* The bsp points at the end of the register frame so we
856 subtract the size of frame from it to get start of register frame. */
857 bsp = rse_address_add (bsp, -(cfm & 0x7f));
859 if ((cfm & 0x7f) > regnum - V32_REGNUM)
860 gr_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
862 natN_val = extract_unsigned_integer (buf, register_size (gdbarch, regnum));
864 if (gr_addr != 0 && (natN_val == 0 || natN_val == 1))
866 /* Compute address of nat collection bits. */
867 CORE_ADDR nat_addr = gr_addr | 0x1f8;
868 CORE_ADDR nat_collection;
869 int natN_bit = (gr_addr >> 3) & 0x3f;
870 ULONGEST natN_mask = (1LL << natN_bit);
871 /* If our nat collection address is bigger than bsp, we have to get
872 the nat collection from rnat. Otherwise, we fetch the nat
873 collection from the computed address. */
876 regcache_cooked_read_unsigned (regcache, IA64_RNAT_REGNUM, &nat_collection);
878 nat_collection |= natN_mask;
880 nat_collection &= ~natN_mask;
881 regcache_cooked_write_unsigned (regcache, IA64_RNAT_REGNUM, nat_collection);
886 nat_collection = read_memory_integer (nat_addr, 8);
888 nat_collection |= natN_mask;
890 nat_collection &= ~natN_mask;
891 store_unsigned_integer (nat_buf, register_size (gdbarch, regnum), nat_collection);
892 write_memory (nat_addr, nat_buf, 8);
896 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
903 regcache_cooked_read_unsigned (regcache, IA64_PR_REGNUM, &pr);
904 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
906 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
908 /* Fetch predicate register rename base from current frame
909 marker for this frame. */
910 int rrb_pr = (cfm >> 32) & 0x3f;
912 /* Adjust the register number to account for register rotation. */
914 + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
916 prN_val = extract_unsigned_integer (buf, register_size (gdbarch, regnum));
917 prN_mask = (1LL << (regnum - VP0_REGNUM));
920 else if (prN_val == 1)
922 regcache_cooked_write_unsigned (regcache, IA64_PR_REGNUM, pr);
926 /* The ia64 needs to convert between various ieee floating-point formats
927 and the special ia64 floating point register format. */
930 ia64_convert_register_p (struct gdbarch *gdbarch, int regno, struct type *type)
932 return (regno >= IA64_FR0_REGNUM && regno <= IA64_FR127_REGNUM
933 && type != builtin_type_ia64_ext);
937 ia64_register_to_value (struct frame_info *frame, int regnum,
938 struct type *valtype, gdb_byte *out)
940 char in[MAX_REGISTER_SIZE];
941 frame_register_read (frame, regnum, in);
942 convert_typed_floating (in, builtin_type_ia64_ext, out, valtype);
946 ia64_value_to_register (struct frame_info *frame, int regnum,
947 struct type *valtype, const gdb_byte *in)
949 char out[MAX_REGISTER_SIZE];
950 convert_typed_floating (in, valtype, out, builtin_type_ia64_ext);
951 put_frame_register (frame, regnum, out);
955 /* Limit the number of skipped non-prologue instructions since examining
956 of the prologue is expensive. */
957 static int max_skip_non_prologue_insns = 40;
959 /* Given PC representing the starting address of a function, and
960 LIM_PC which is the (sloppy) limit to which to scan when looking
961 for a prologue, attempt to further refine this limit by using
962 the line data in the symbol table. If successful, a better guess
963 on where the prologue ends is returned, otherwise the previous
964 value of lim_pc is returned. TRUST_LIMIT is a pointer to a flag
965 which will be set to indicate whether the returned limit may be
966 used with no further scanning in the event that the function is
969 /* FIXME: cagney/2004-02-14: This function and logic have largely been
970 superseded by skip_prologue_using_sal. */
973 refine_prologue_limit (CORE_ADDR pc, CORE_ADDR lim_pc, int *trust_limit)
975 struct symtab_and_line prologue_sal;
976 CORE_ADDR start_pc = pc;
979 /* The prologue can not possibly go past the function end itself,
980 so we can already adjust LIM_PC accordingly. */
981 if (find_pc_partial_function (pc, NULL, NULL, &end_pc) && end_pc < lim_pc)
984 /* Start off not trusting the limit. */
987 prologue_sal = find_pc_line (pc, 0);
988 if (prologue_sal.line != 0)
991 CORE_ADDR addr = prologue_sal.end;
993 /* Handle the case in which compiler's optimizer/scheduler
994 has moved instructions into the prologue. We scan ahead
995 in the function looking for address ranges whose corresponding
996 line number is less than or equal to the first one that we
997 found for the function. (It can be less than when the
998 scheduler puts a body instruction before the first prologue
1000 for (i = 2 * max_skip_non_prologue_insns;
1001 i > 0 && (lim_pc == 0 || addr < lim_pc);
1004 struct symtab_and_line sal;
1006 sal = find_pc_line (addr, 0);
1009 if (sal.line <= prologue_sal.line
1010 && sal.symtab == prologue_sal.symtab)
1017 if (lim_pc == 0 || prologue_sal.end < lim_pc)
1019 lim_pc = prologue_sal.end;
1020 if (start_pc == get_pc_function_start (lim_pc))
1027 #define isScratch(_regnum_) ((_regnum_) == 2 || (_regnum_) == 3 \
1028 || (8 <= (_regnum_) && (_regnum_) <= 11) \
1029 || (14 <= (_regnum_) && (_regnum_) <= 31))
1030 #define imm9(_instr_) \
1031 ( ((((_instr_) & 0x01000000000LL) ? -1 : 0) << 8) \
1032 | (((_instr_) & 0x00008000000LL) >> 20) \
1033 | (((_instr_) & 0x00000001fc0LL) >> 6))
1035 /* Allocate and initialize a frame cache. */
1037 static struct ia64_frame_cache *
1038 ia64_alloc_frame_cache (void)
1040 struct ia64_frame_cache *cache;
1043 cache = FRAME_OBSTACK_ZALLOC (struct ia64_frame_cache);
1049 cache->prev_cfm = 0;
1055 cache->frameless = 1;
1057 for (i = 0; i < NUM_IA64_RAW_REGS; i++)
1058 cache->saved_regs[i] = 0;
1064 examine_prologue (CORE_ADDR pc, CORE_ADDR lim_pc,
1065 struct frame_info *this_frame,
1066 struct ia64_frame_cache *cache)
1069 CORE_ADDR last_prologue_pc = pc;
1070 instruction_type it;
1075 int unat_save_reg = 0;
1076 int pr_save_reg = 0;
1077 int mem_stack_frame_size = 0;
1079 CORE_ADDR spill_addr = 0;
1082 char reg_contents[256];
1088 CORE_ADDR bof, sor, sol, sof, cfm, rrb_gr;
1090 memset (instores, 0, sizeof instores);
1091 memset (infpstores, 0, sizeof infpstores);
1092 memset (reg_contents, 0, sizeof reg_contents);
1094 if (cache->after_prologue != 0
1095 && cache->after_prologue <= lim_pc)
1096 return cache->after_prologue;
1098 lim_pc = refine_prologue_limit (pc, lim_pc, &trust_limit);
1099 next_pc = fetch_instruction (pc, &it, &instr);
1101 /* We want to check if we have a recognizable function start before we
1102 look ahead for a prologue. */
1103 if (pc < lim_pc && next_pc
1104 && it == M && ((instr & 0x1ee0000003fLL) == 0x02c00000000LL))
1106 /* alloc - start of a regular function. */
1107 int sor = (int) ((instr & 0x00078000000LL) >> 27);
1108 int sol = (int) ((instr & 0x00007f00000LL) >> 20);
1109 int sof = (int) ((instr & 0x000000fe000LL) >> 13);
1110 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1112 /* Verify that the current cfm matches what we think is the
1113 function start. If we have somehow jumped within a function,
1114 we do not want to interpret the prologue and calculate the
1115 addresses of various registers such as the return address.
1116 We will instead treat the frame as frameless. */
1118 (sof == (cache->cfm & 0x7f) &&
1119 sol == ((cache->cfm >> 7) & 0x7f)))
1123 last_prologue_pc = next_pc;
1128 /* Look for a leaf routine. */
1129 if (pc < lim_pc && next_pc
1130 && (it == I || it == M)
1131 && ((instr & 0x1ee00000000LL) == 0x10800000000LL))
1133 /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */
1134 int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13)
1135 | ((instr & 0x001f8000000LL) >> 20)
1136 | ((instr & 0x000000fe000LL) >> 13));
1137 int rM = (int) ((instr & 0x00007f00000LL) >> 20);
1138 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1139 int qp = (int) (instr & 0x0000000003fLL);
1140 if (qp == 0 && rN == 2 && imm == 0 && rM == 12 && fp_reg == 0)
1142 /* mov r2, r12 - beginning of leaf routine */
1144 last_prologue_pc = next_pc;
1148 /* If we don't recognize a regular function or leaf routine, we are
1154 last_prologue_pc = lim_pc;
1158 /* Loop, looking for prologue instructions, keeping track of
1159 where preserved registers were spilled. */
1162 next_pc = fetch_instruction (pc, &it, &instr);
1166 if (it == B && ((instr & 0x1e1f800003fLL) != 0x04000000000LL))
1168 /* Exit loop upon hitting a non-nop branch instruction. */
1173 else if (((instr & 0x3fLL) != 0LL) &&
1174 (frameless || ret_reg != 0))
1176 /* Exit loop upon hitting a predicated instruction if
1177 we already have the return register or if we are frameless. */
1182 else if (it == I && ((instr & 0x1eff8000000LL) == 0x00188000000LL))
1185 int b2 = (int) ((instr & 0x0000000e000LL) >> 13);
1186 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1187 int qp = (int) (instr & 0x0000000003f);
1189 if (qp == 0 && b2 == 0 && rN >= 32 && ret_reg == 0)
1192 last_prologue_pc = next_pc;
1195 else if ((it == I || it == M)
1196 && ((instr & 0x1ee00000000LL) == 0x10800000000LL))
1198 /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */
1199 int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13)
1200 | ((instr & 0x001f8000000LL) >> 20)
1201 | ((instr & 0x000000fe000LL) >> 13));
1202 int rM = (int) ((instr & 0x00007f00000LL) >> 20);
1203 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1204 int qp = (int) (instr & 0x0000000003fLL);
1206 if (qp == 0 && rN >= 32 && imm == 0 && rM == 12 && fp_reg == 0)
1210 last_prologue_pc = next_pc;
1212 else if (qp == 0 && rN == 12 && rM == 12)
1214 /* adds r12, -mem_stack_frame_size, r12 */
1215 mem_stack_frame_size -= imm;
1216 last_prologue_pc = next_pc;
1218 else if (qp == 0 && rN == 2
1219 && ((rM == fp_reg && fp_reg != 0) || rM == 12))
1221 char buf[MAX_REGISTER_SIZE];
1222 CORE_ADDR saved_sp = 0;
1223 /* adds r2, spilloffset, rFramePointer
1225 adds r2, spilloffset, r12
1227 Get ready for stf.spill or st8.spill instructions.
1228 The address to start spilling at is loaded into r2.
1229 FIXME: Why r2? That's what gcc currently uses; it
1230 could well be different for other compilers. */
1232 /* Hmm... whether or not this will work will depend on
1233 where the pc is. If it's still early in the prologue
1234 this'll be wrong. FIXME */
1237 get_frame_register (this_frame, sp_regnum, buf);
1238 saved_sp = extract_unsigned_integer (buf, 8);
1240 spill_addr = saved_sp
1241 + (rM == 12 ? 0 : mem_stack_frame_size)
1244 last_prologue_pc = next_pc;
1246 else if (qp == 0 && rM >= 32 && rM < 40 && !instores[rM-32] &&
1247 rN < 256 && imm == 0)
1249 /* mov rN, rM where rM is an input register */
1250 reg_contents[rN] = rM;
1251 last_prologue_pc = next_pc;
1253 else if (frameless && qp == 0 && rN == fp_reg && imm == 0 &&
1257 last_prologue_pc = next_pc;
1262 && ( ((instr & 0x1efc0000000LL) == 0x0eec0000000LL)
1263 || ((instr & 0x1ffc8000000LL) == 0x0cec0000000LL) ))
1265 /* stf.spill [rN] = fM, imm9
1267 stf.spill [rN] = fM */
1269 int imm = imm9(instr);
1270 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1271 int fM = (int) ((instr & 0x000000fe000LL) >> 13);
1272 int qp = (int) (instr & 0x0000000003fLL);
1273 if (qp == 0 && rN == spill_reg && spill_addr != 0
1274 && ((2 <= fM && fM <= 5) || (16 <= fM && fM <= 31)))
1276 cache->saved_regs[IA64_FR0_REGNUM + fM] = spill_addr;
1278 if ((instr & 0x1efc0000000LL) == 0x0eec0000000LL)
1281 spill_addr = 0; /* last one; must be done */
1282 last_prologue_pc = next_pc;
1285 else if ((it == M && ((instr & 0x1eff8000000LL) == 0x02110000000LL))
1286 || (it == I && ((instr & 0x1eff8000000LL) == 0x00050000000LL)) )
1292 int arM = (int) ((instr & 0x00007f00000LL) >> 20);
1293 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1294 int qp = (int) (instr & 0x0000000003fLL);
1295 if (qp == 0 && isScratch (rN) && arM == 36 /* ar.unat */)
1297 /* We have something like "mov.m r3 = ar.unat". Remember the
1298 r3 (or whatever) and watch for a store of this register... */
1300 last_prologue_pc = next_pc;
1303 else if (it == I && ((instr & 0x1eff8000000LL) == 0x00198000000LL))
1306 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1307 int qp = (int) (instr & 0x0000000003fLL);
1308 if (qp == 0 && isScratch (rN))
1311 last_prologue_pc = next_pc;
1315 && ( ((instr & 0x1ffc8000000LL) == 0x08cc0000000LL)
1316 || ((instr & 0x1efc0000000LL) == 0x0acc0000000LL)))
1320 st8 [rN] = rM, imm9 */
1321 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1322 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1323 int qp = (int) (instr & 0x0000000003fLL);
1324 int indirect = rM < 256 ? reg_contents[rM] : 0;
1325 if (qp == 0 && rN == spill_reg && spill_addr != 0
1326 && (rM == unat_save_reg || rM == pr_save_reg))
1328 /* We've found a spill of either the UNAT register or the PR
1329 register. (Well, not exactly; what we've actually found is
1330 a spill of the register that UNAT or PR was moved to).
1331 Record that fact and move on... */
1332 if (rM == unat_save_reg)
1334 /* Track UNAT register */
1335 cache->saved_regs[IA64_UNAT_REGNUM] = spill_addr;
1340 /* Track PR register */
1341 cache->saved_regs[IA64_PR_REGNUM] = spill_addr;
1344 if ((instr & 0x1efc0000000LL) == 0x0acc0000000LL)
1345 /* st8 [rN] = rM, imm9 */
1346 spill_addr += imm9(instr);
1348 spill_addr = 0; /* must be done spilling */
1349 last_prologue_pc = next_pc;
1351 else if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32])
1353 /* Allow up to one store of each input register. */
1354 instores[rM-32] = 1;
1355 last_prologue_pc = next_pc;
1357 else if (qp == 0 && 32 <= indirect && indirect < 40 &&
1358 !instores[indirect-32])
1360 /* Allow an indirect store of an input register. */
1361 instores[indirect-32] = 1;
1362 last_prologue_pc = next_pc;
1365 else if (it == M && ((instr & 0x1ff08000000LL) == 0x08c00000000LL))
1372 Note that the st8 case is handled in the clause above.
1374 Advance over stores of input registers. One store per input
1375 register is permitted. */
1376 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1377 int qp = (int) (instr & 0x0000000003fLL);
1378 int indirect = rM < 256 ? reg_contents[rM] : 0;
1379 if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32])
1381 instores[rM-32] = 1;
1382 last_prologue_pc = next_pc;
1384 else if (qp == 0 && 32 <= indirect && indirect < 40 &&
1385 !instores[indirect-32])
1387 /* Allow an indirect store of an input register. */
1388 instores[indirect-32] = 1;
1389 last_prologue_pc = next_pc;
1392 else if (it == M && ((instr & 0x1ff88000000LL) == 0x0cc80000000LL))
1399 Advance over stores of floating point input registers. Again
1400 one store per register is permitted */
1401 int fM = (int) ((instr & 0x000000fe000LL) >> 13);
1402 int qp = (int) (instr & 0x0000000003fLL);
1403 if (qp == 0 && 8 <= fM && fM < 16 && !infpstores[fM - 8])
1405 infpstores[fM-8] = 1;
1406 last_prologue_pc = next_pc;
1410 && ( ((instr & 0x1ffc8000000LL) == 0x08ec0000000LL)
1411 || ((instr & 0x1efc0000000LL) == 0x0aec0000000LL)))
1413 /* st8.spill [rN] = rM
1415 st8.spill [rN] = rM, imm9 */
1416 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1417 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1418 int qp = (int) (instr & 0x0000000003fLL);
1419 if (qp == 0 && rN == spill_reg && 4 <= rM && rM <= 7)
1421 /* We've found a spill of one of the preserved general purpose
1422 regs. Record the spill address and advance the spill
1423 register if appropriate. */
1424 cache->saved_regs[IA64_GR0_REGNUM + rM] = spill_addr;
1425 if ((instr & 0x1efc0000000LL) == 0x0aec0000000LL)
1426 /* st8.spill [rN] = rM, imm9 */
1427 spill_addr += imm9(instr);
1429 spill_addr = 0; /* Done spilling */
1430 last_prologue_pc = next_pc;
1437 /* If not frameless and we aren't called by skip_prologue, then we need
1438 to calculate registers for the previous frame which will be needed
1441 if (!frameless && this_frame)
1443 /* Extract the size of the rotating portion of the stack
1444 frame and the register rename base from the current
1450 rrb_gr = (cfm >> 18) & 0x7f;
1452 /* Find the bof (beginning of frame). */
1453 bof = rse_address_add (cache->bsp, -sof);
1455 for (i = 0, addr = bof;
1459 if (IS_NaT_COLLECTION_ADDR (addr))
1463 if (i+32 == cfm_reg)
1464 cache->saved_regs[IA64_CFM_REGNUM] = addr;
1465 if (i+32 == ret_reg)
1466 cache->saved_regs[IA64_VRAP_REGNUM] = addr;
1468 cache->saved_regs[IA64_VFP_REGNUM] = addr;
1471 /* For the previous argument registers we require the previous bof.
1472 If we can't find the previous cfm, then we can do nothing. */
1474 if (cache->saved_regs[IA64_CFM_REGNUM] != 0)
1476 cfm = read_memory_integer (cache->saved_regs[IA64_CFM_REGNUM], 8);
1478 else if (cfm_reg != 0)
1480 get_frame_register (this_frame, cfm_reg, buf);
1481 cfm = extract_unsigned_integer (buf, 8);
1483 cache->prev_cfm = cfm;
1487 sor = ((cfm >> 14) & 0xf) * 8;
1489 sol = (cfm >> 7) & 0x7f;
1490 rrb_gr = (cfm >> 18) & 0x7f;
1492 /* The previous bof only requires subtraction of the sol (size of
1493 locals) due to the overlap between output and input of
1494 subsequent frames. */
1495 bof = rse_address_add (bof, -sol);
1497 for (i = 0, addr = bof;
1501 if (IS_NaT_COLLECTION_ADDR (addr))
1506 cache->saved_regs[IA64_GR32_REGNUM + ((i + (sor - rrb_gr)) % sor)]
1509 cache->saved_regs[IA64_GR32_REGNUM + i] = addr;
1515 /* Try and trust the lim_pc value whenever possible. */
1516 if (trust_limit && lim_pc >= last_prologue_pc)
1517 last_prologue_pc = lim_pc;
1519 cache->frameless = frameless;
1520 cache->after_prologue = last_prologue_pc;
1521 cache->mem_stack_frame_size = mem_stack_frame_size;
1522 cache->fp_reg = fp_reg;
1524 return last_prologue_pc;
1528 ia64_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
1530 struct ia64_frame_cache cache;
1532 cache.after_prologue = 0;
1536 /* Call examine_prologue with - as third argument since we don't have a next frame pointer to send. */
1537 return examine_prologue (pc, pc+1024, 0, &cache);
1541 /* Normal frames. */
1543 static struct ia64_frame_cache *
1544 ia64_frame_cache (struct frame_info *this_frame, void **this_cache)
1546 struct ia64_frame_cache *cache;
1548 CORE_ADDR cfm, sof, sol, bsp, psr;
1554 cache = ia64_alloc_frame_cache ();
1555 *this_cache = cache;
1557 get_frame_register (this_frame, sp_regnum, buf);
1558 cache->saved_sp = extract_unsigned_integer (buf, 8);
1560 /* We always want the bsp to point to the end of frame.
1561 This way, we can always get the beginning of frame (bof)
1562 by subtracting frame size. */
1563 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
1564 cache->bsp = extract_unsigned_integer (buf, 8);
1566 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
1567 psr = extract_unsigned_integer (buf, 8);
1569 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
1570 cfm = extract_unsigned_integer (buf, 8);
1572 cache->sof = (cfm & 0x7f);
1573 cache->sol = (cfm >> 7) & 0x7f;
1574 cache->sor = ((cfm >> 14) & 0xf) * 8;
1578 cache->pc = get_frame_func (this_frame);
1581 examine_prologue (cache->pc, get_frame_pc (this_frame), this_frame, cache);
1583 cache->base = cache->saved_sp + cache->mem_stack_frame_size;
1589 ia64_frame_this_id (struct frame_info *this_frame, void **this_cache,
1590 struct frame_id *this_id)
1592 struct ia64_frame_cache *cache =
1593 ia64_frame_cache (this_frame, this_cache);
1595 /* If outermost frame, mark with null frame id. */
1596 if (cache->base == 0)
1597 (*this_id) = null_frame_id;
1599 (*this_id) = frame_id_build_special (cache->base, cache->pc, cache->bsp);
1600 if (gdbarch_debug >= 1)
1601 fprintf_unfiltered (gdb_stdlog,
1602 "regular frame id: code 0x%s, stack 0x%s, special 0x%s, this_frame %p\n",
1603 paddr_nz (this_id->code_addr),
1604 paddr_nz (this_id->stack_addr),
1605 paddr_nz (cache->bsp), this_frame);
1608 static struct value *
1609 ia64_frame_prev_register (struct frame_info *this_frame, void **this_cache,
1612 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1613 struct ia64_frame_cache *cache = ia64_frame_cache (this_frame, this_cache);
1616 gdb_assert (regnum >= 0);
1618 if (!target_has_registers)
1619 error (_("No registers."));
1621 if (regnum == gdbarch_sp_regnum (gdbarch))
1622 return frame_unwind_got_constant (this_frame, regnum, cache->base);
1624 else if (regnum == IA64_BSP_REGNUM)
1627 CORE_ADDR prev_cfm, bsp, prev_bsp;
1629 /* We want to calculate the previous bsp as the end of the previous
1630 register stack frame. This corresponds to what the hardware bsp
1631 register will be if we pop the frame back which is why we might
1632 have been called. We know the beginning of the current frame is
1633 cache->bsp - cache->sof. This value in the previous frame points
1634 to the start of the output registers. We can calculate the end of
1635 that frame by adding the size of output:
1636 (sof (size of frame) - sol (size of locals)). */
1637 val = ia64_frame_prev_register (this_frame, this_cache, IA64_CFM_REGNUM);
1638 prev_cfm = extract_unsigned_integer (value_contents_all (val), 8);
1639 bsp = rse_address_add (cache->bsp, -(cache->sof));
1641 rse_address_add (bsp, (prev_cfm & 0x7f) - ((prev_cfm >> 7) & 0x7f));
1643 return frame_unwind_got_constant (this_frame, regnum, prev_bsp);
1646 else if (regnum == IA64_CFM_REGNUM)
1648 CORE_ADDR addr = cache->saved_regs[IA64_CFM_REGNUM];
1651 return frame_unwind_got_memory (this_frame, regnum, addr);
1653 if (cache->prev_cfm)
1654 return frame_unwind_got_constant (this_frame, regnum, cache->prev_cfm);
1656 if (cache->frameless)
1657 return frame_unwind_got_register (this_frame, IA64_PFS_REGNUM,
1659 return frame_unwind_got_register (this_frame, regnum, 0);
1662 else if (regnum == IA64_VFP_REGNUM)
1664 /* If the function in question uses an automatic register (r32-r127)
1665 for the frame pointer, it'll be found by ia64_find_saved_register()
1666 above. If the function lacks one of these frame pointers, we can
1667 still provide a value since we know the size of the frame. */
1668 return frame_unwind_got_constant (this_frame, regnum, cache->base);
1671 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
1673 struct value *pr_val;
1676 pr_val = ia64_frame_prev_register (this_frame, this_cache,
1678 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
1680 /* Fetch predicate register rename base from current frame
1681 marker for this frame. */
1682 int rrb_pr = (cache->cfm >> 32) & 0x3f;
1684 /* Adjust the register number to account for register rotation. */
1685 regnum = VP16_REGNUM + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
1687 prN = extract_bit_field (value_contents_all (pr_val),
1688 regnum - VP0_REGNUM, 1);
1689 return frame_unwind_got_constant (this_frame, regnum, prN);
1692 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
1694 struct value *unat_val;
1696 unat_val = ia64_frame_prev_register (this_frame, this_cache,
1698 unatN = extract_bit_field (value_contents_all (unat_val),
1699 regnum - IA64_NAT0_REGNUM, 1);
1700 return frame_unwind_got_constant (this_frame, regnum, unatN);
1703 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
1706 /* Find address of general register corresponding to nat bit we're
1710 gr_addr = cache->saved_regs[regnum - IA64_NAT0_REGNUM + IA64_GR0_REGNUM];
1714 /* Compute address of nat collection bits. */
1715 CORE_ADDR nat_addr = gr_addr | 0x1f8;
1717 CORE_ADDR nat_collection;
1720 /* If our nat collection address is bigger than bsp, we have to get
1721 the nat collection from rnat. Otherwise, we fetch the nat
1722 collection from the computed address. */
1723 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
1724 bsp = extract_unsigned_integer (buf, 8);
1725 if (nat_addr >= bsp)
1727 get_frame_register (this_frame, IA64_RNAT_REGNUM, buf);
1728 nat_collection = extract_unsigned_integer (buf, 8);
1731 nat_collection = read_memory_integer (nat_addr, 8);
1732 nat_bit = (gr_addr >> 3) & 0x3f;
1733 natval = (nat_collection >> nat_bit) & 1;
1736 return frame_unwind_got_constant (this_frame, regnum, natval);
1739 else if (regnum == IA64_IP_REGNUM)
1742 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
1746 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
1747 pc = extract_unsigned_integer (buf, 8);
1749 else if (cache->frameless)
1751 get_frame_register (this_frame, IA64_BR0_REGNUM, buf);
1752 pc = extract_unsigned_integer (buf, 8);
1755 return frame_unwind_got_constant (this_frame, regnum, pc);
1758 else if (regnum == IA64_PSR_REGNUM)
1760 /* We don't know how to get the complete previous PSR, but we need it
1761 for the slot information when we unwind the pc (pc is formed of IP
1762 register plus slot information from PSR). To get the previous
1763 slot information, we mask it off the return address. */
1764 ULONGEST slot_num = 0;
1767 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
1769 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
1770 psr = extract_unsigned_integer (buf, 8);
1774 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
1775 pc = extract_unsigned_integer (buf, 8);
1777 else if (cache->frameless)
1779 get_frame_register (this_frame, IA64_BR0_REGNUM, buf);
1780 pc = extract_unsigned_integer (buf, 8);
1782 psr &= ~(3LL << 41);
1783 slot_num = pc & 0x3LL;
1784 psr |= (CORE_ADDR)slot_num << 41;
1785 return frame_unwind_got_constant (this_frame, regnum, psr);
1788 else if (regnum == IA64_BR0_REGNUM)
1790 CORE_ADDR addr = cache->saved_regs[IA64_BR0_REGNUM];
1793 return frame_unwind_got_memory (this_frame, regnum, addr);
1795 return frame_unwind_got_constant (this_frame, regnum, 0);
1798 else if ((regnum >= IA64_GR32_REGNUM && regnum <= IA64_GR127_REGNUM)
1799 || (regnum >= V32_REGNUM && regnum <= V127_REGNUM))
1803 if (regnum >= V32_REGNUM)
1804 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
1805 addr = cache->saved_regs[regnum];
1807 return frame_unwind_got_memory (this_frame, regnum, addr);
1809 if (cache->frameless)
1811 struct value *reg_val;
1812 CORE_ADDR prev_cfm, prev_bsp, prev_bof;
1814 /* FIXME: brobecker/2008-05-01: Doesn't this seem redundant
1815 with the same code above? */
1816 if (regnum >= V32_REGNUM)
1817 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
1818 reg_val = ia64_frame_prev_register (this_frame, this_cache,
1820 prev_cfm = extract_unsigned_integer (value_contents_all (reg_val),
1822 reg_val = ia64_frame_prev_register (this_frame, this_cache,
1824 prev_bsp = extract_unsigned_integer (value_contents_all (reg_val),
1826 prev_bof = rse_address_add (prev_bsp, -(prev_cfm & 0x7f));
1828 addr = rse_address_add (prev_bof, (regnum - IA64_GR32_REGNUM));
1829 return frame_unwind_got_memory (this_frame, regnum, addr);
1832 return frame_unwind_got_constant (this_frame, regnum, 0);
1835 else /* All other registers. */
1839 if (IA64_FR32_REGNUM <= regnum && regnum <= IA64_FR127_REGNUM)
1841 /* Fetch floating point register rename base from current
1842 frame marker for this frame. */
1843 int rrb_fr = (cache->cfm >> 25) & 0x7f;
1845 /* Adjust the floating point register number to account for
1846 register rotation. */
1847 regnum = IA64_FR32_REGNUM
1848 + ((regnum - IA64_FR32_REGNUM) + rrb_fr) % 96;
1851 /* If we have stored a memory address, access the register. */
1852 addr = cache->saved_regs[regnum];
1854 return frame_unwind_got_memory (this_frame, regnum, addr);
1855 /* Otherwise, punt and get the current value of the register. */
1857 return frame_unwind_got_register (this_frame, regnum, regnum);
1861 static const struct frame_unwind ia64_frame_unwind =
1864 &ia64_frame_this_id,
1865 &ia64_frame_prev_register,
1867 default_frame_sniffer
1870 /* Signal trampolines. */
1873 ia64_sigtramp_frame_init_saved_regs (struct frame_info *this_frame,
1874 struct ia64_frame_cache *cache)
1876 struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame));
1878 if (tdep->sigcontext_register_address)
1882 cache->saved_regs[IA64_VRAP_REGNUM] =
1883 tdep->sigcontext_register_address (cache->base, IA64_IP_REGNUM);
1884 cache->saved_regs[IA64_CFM_REGNUM] =
1885 tdep->sigcontext_register_address (cache->base, IA64_CFM_REGNUM);
1886 cache->saved_regs[IA64_PSR_REGNUM] =
1887 tdep->sigcontext_register_address (cache->base, IA64_PSR_REGNUM);
1888 cache->saved_regs[IA64_BSP_REGNUM] =
1889 tdep->sigcontext_register_address (cache->base, IA64_BSP_REGNUM);
1890 cache->saved_regs[IA64_RNAT_REGNUM] =
1891 tdep->sigcontext_register_address (cache->base, IA64_RNAT_REGNUM);
1892 cache->saved_regs[IA64_CCV_REGNUM] =
1893 tdep->sigcontext_register_address (cache->base, IA64_CCV_REGNUM);
1894 cache->saved_regs[IA64_UNAT_REGNUM] =
1895 tdep->sigcontext_register_address (cache->base, IA64_UNAT_REGNUM);
1896 cache->saved_regs[IA64_FPSR_REGNUM] =
1897 tdep->sigcontext_register_address (cache->base, IA64_FPSR_REGNUM);
1898 cache->saved_regs[IA64_PFS_REGNUM] =
1899 tdep->sigcontext_register_address (cache->base, IA64_PFS_REGNUM);
1900 cache->saved_regs[IA64_LC_REGNUM] =
1901 tdep->sigcontext_register_address (cache->base, IA64_LC_REGNUM);
1902 for (regno = IA64_GR1_REGNUM; regno <= IA64_GR31_REGNUM; regno++)
1903 cache->saved_regs[regno] =
1904 tdep->sigcontext_register_address (cache->base, regno);
1905 for (regno = IA64_BR0_REGNUM; regno <= IA64_BR7_REGNUM; regno++)
1906 cache->saved_regs[regno] =
1907 tdep->sigcontext_register_address (cache->base, regno);
1908 for (regno = IA64_FR2_REGNUM; regno <= IA64_FR31_REGNUM; regno++)
1909 cache->saved_regs[regno] =
1910 tdep->sigcontext_register_address (cache->base, regno);
1914 static struct ia64_frame_cache *
1915 ia64_sigtramp_frame_cache (struct frame_info *this_frame, void **this_cache)
1917 struct ia64_frame_cache *cache;
1925 cache = ia64_alloc_frame_cache ();
1927 get_frame_register (this_frame, sp_regnum, buf);
1928 /* Note that frame size is hard-coded below. We cannot calculate it
1929 via prologue examination. */
1930 cache->base = extract_unsigned_integer (buf, 8) + 16;
1932 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
1933 cache->bsp = extract_unsigned_integer (buf, 8);
1935 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
1936 cache->cfm = extract_unsigned_integer (buf, 8);
1937 cache->sof = cache->cfm & 0x7f;
1939 ia64_sigtramp_frame_init_saved_regs (this_frame, cache);
1941 *this_cache = cache;
1946 ia64_sigtramp_frame_this_id (struct frame_info *this_frame,
1947 void **this_cache, struct frame_id *this_id)
1949 struct ia64_frame_cache *cache =
1950 ia64_sigtramp_frame_cache (this_frame, this_cache);
1952 (*this_id) = frame_id_build_special (cache->base,
1953 get_frame_pc (this_frame),
1955 if (gdbarch_debug >= 1)
1956 fprintf_unfiltered (gdb_stdlog,
1957 "sigtramp frame id: code 0x%s, stack 0x%s, special 0x%s, this_frame %p\n",
1958 paddr_nz (this_id->code_addr),
1959 paddr_nz (this_id->stack_addr),
1960 paddr_nz (cache->bsp), this_frame);
1963 static struct value *
1964 ia64_sigtramp_frame_prev_register (struct frame_info *this_frame,
1965 void **this_cache, int regnum)
1967 char buf[MAX_REGISTER_SIZE];
1969 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1970 struct ia64_frame_cache *cache =
1971 ia64_sigtramp_frame_cache (this_frame, this_cache);
1973 gdb_assert (regnum >= 0);
1975 if (!target_has_registers)
1976 error (_("No registers."));
1978 if (regnum == IA64_IP_REGNUM)
1981 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
1985 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
1986 pc = extract_unsigned_integer (buf, 8);
1989 return frame_unwind_got_constant (this_frame, regnum, pc);
1992 else if ((regnum >= IA64_GR32_REGNUM && regnum <= IA64_GR127_REGNUM)
1993 || (regnum >= V32_REGNUM && regnum <= V127_REGNUM))
1997 if (regnum >= V32_REGNUM)
1998 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
1999 addr = cache->saved_regs[regnum];
2001 return frame_unwind_got_memory (this_frame, regnum, addr);
2003 return frame_unwind_got_constant (this_frame, regnum, 0);
2006 else /* All other registers not listed above. */
2008 CORE_ADDR addr = cache->saved_regs[regnum];
2011 return frame_unwind_got_memory (this_frame, regnum, addr);
2013 return frame_unwind_got_constant (this_frame, regnum, 0);
2018 ia64_sigtramp_frame_sniffer (const struct frame_unwind *self,
2019 struct frame_info *this_frame,
2022 struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame));
2023 if (tdep->pc_in_sigtramp)
2025 CORE_ADDR pc = get_frame_pc (this_frame);
2027 if (tdep->pc_in_sigtramp (pc))
2034 static const struct frame_unwind ia64_sigtramp_frame_unwind =
2037 ia64_sigtramp_frame_this_id,
2038 ia64_sigtramp_frame_prev_register,
2040 ia64_sigtramp_frame_sniffer
2046 ia64_frame_base_address (struct frame_info *this_frame, void **this_cache)
2048 struct ia64_frame_cache *cache = ia64_frame_cache (this_frame, this_cache);
2053 static const struct frame_base ia64_frame_base =
2056 ia64_frame_base_address,
2057 ia64_frame_base_address,
2058 ia64_frame_base_address
2061 #ifdef HAVE_LIBUNWIND_IA64_H
2063 struct ia64_unwind_table_entry
2065 unw_word_t start_offset;
2066 unw_word_t end_offset;
2067 unw_word_t info_offset;
2070 static __inline__ uint64_t
2071 ia64_rse_slot_num (uint64_t addr)
2073 return (addr >> 3) & 0x3f;
2076 /* Skip over a designated number of registers in the backing
2077 store, remembering every 64th position is for NAT. */
2078 static __inline__ uint64_t
2079 ia64_rse_skip_regs (uint64_t addr, long num_regs)
2081 long delta = ia64_rse_slot_num(addr) + num_regs;
2085 return addr + ((num_regs + delta/0x3f) << 3);
2088 /* Gdb libunwind-frame callback function to convert from an ia64 gdb register
2089 number to a libunwind register number. */
2091 ia64_gdb2uw_regnum (int regnum)
2093 if (regnum == sp_regnum)
2095 else if (regnum == IA64_BSP_REGNUM)
2096 return UNW_IA64_BSP;
2097 else if ((unsigned) (regnum - IA64_GR0_REGNUM) < 128)
2098 return UNW_IA64_GR + (regnum - IA64_GR0_REGNUM);
2099 else if ((unsigned) (regnum - V32_REGNUM) < 95)
2100 return UNW_IA64_GR + 32 + (regnum - V32_REGNUM);
2101 else if ((unsigned) (regnum - IA64_FR0_REGNUM) < 128)
2102 return UNW_IA64_FR + (regnum - IA64_FR0_REGNUM);
2103 else if ((unsigned) (regnum - IA64_PR0_REGNUM) < 64)
2105 else if ((unsigned) (regnum - IA64_BR0_REGNUM) < 8)
2106 return UNW_IA64_BR + (regnum - IA64_BR0_REGNUM);
2107 else if (regnum == IA64_PR_REGNUM)
2109 else if (regnum == IA64_IP_REGNUM)
2111 else if (regnum == IA64_CFM_REGNUM)
2112 return UNW_IA64_CFM;
2113 else if ((unsigned) (regnum - IA64_AR0_REGNUM) < 128)
2114 return UNW_IA64_AR + (regnum - IA64_AR0_REGNUM);
2115 else if ((unsigned) (regnum - IA64_NAT0_REGNUM) < 128)
2116 return UNW_IA64_NAT + (regnum - IA64_NAT0_REGNUM);
2121 /* Gdb libunwind-frame callback function to convert from a libunwind register
2122 number to a ia64 gdb register number. */
2124 ia64_uw2gdb_regnum (int uw_regnum)
2126 if (uw_regnum == UNW_IA64_SP)
2128 else if (uw_regnum == UNW_IA64_BSP)
2129 return IA64_BSP_REGNUM;
2130 else if ((unsigned) (uw_regnum - UNW_IA64_GR) < 32)
2131 return IA64_GR0_REGNUM + (uw_regnum - UNW_IA64_GR);
2132 else if ((unsigned) (uw_regnum - UNW_IA64_GR) < 128)
2133 return V32_REGNUM + (uw_regnum - (IA64_GR0_REGNUM + 32));
2134 else if ((unsigned) (uw_regnum - UNW_IA64_FR) < 128)
2135 return IA64_FR0_REGNUM + (uw_regnum - UNW_IA64_FR);
2136 else if ((unsigned) (uw_regnum - UNW_IA64_BR) < 8)
2137 return IA64_BR0_REGNUM + (uw_regnum - UNW_IA64_BR);
2138 else if (uw_regnum == UNW_IA64_PR)
2139 return IA64_PR_REGNUM;
2140 else if (uw_regnum == UNW_REG_IP)
2141 return IA64_IP_REGNUM;
2142 else if (uw_regnum == UNW_IA64_CFM)
2143 return IA64_CFM_REGNUM;
2144 else if ((unsigned) (uw_regnum - UNW_IA64_AR) < 128)
2145 return IA64_AR0_REGNUM + (uw_regnum - UNW_IA64_AR);
2146 else if ((unsigned) (uw_regnum - UNW_IA64_NAT) < 128)
2147 return IA64_NAT0_REGNUM + (uw_regnum - UNW_IA64_NAT);
2152 /* Gdb libunwind-frame callback function to reveal if register is a float
2155 ia64_is_fpreg (int uw_regnum)
2157 return unw_is_fpreg (uw_regnum);
2160 /* Libunwind callback accessor function for general registers. */
2162 ia64_access_reg (unw_addr_space_t as, unw_regnum_t uw_regnum, unw_word_t *val,
2163 int write, void *arg)
2165 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2166 unw_word_t bsp, sof, sol, cfm, psr, ip;
2167 struct frame_info *this_frame = arg;
2168 long new_sof, old_sof;
2169 char buf[MAX_REGISTER_SIZE];
2171 /* We never call any libunwind routines that need to write registers. */
2172 gdb_assert (!write);
2177 /* Libunwind expects to see the pc value which means the slot number
2178 from the psr must be merged with the ip word address. */
2179 get_frame_register (this_frame, IA64_IP_REGNUM, buf);
2180 ip = extract_unsigned_integer (buf, 8);
2181 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
2182 psr = extract_unsigned_integer (buf, 8);
2183 *val = ip | ((psr >> 41) & 0x3);
2186 case UNW_IA64_AR_BSP:
2187 /* Libunwind expects to see the beginning of the current register
2188 frame so we must account for the fact that ptrace() will return a value
2189 for bsp that points *after* the current register frame. */
2190 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2191 bsp = extract_unsigned_integer (buf, 8);
2192 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2193 cfm = extract_unsigned_integer (buf, 8);
2195 *val = ia64_rse_skip_regs (bsp, -sof);
2198 case UNW_IA64_AR_BSPSTORE:
2199 /* Libunwind wants bspstore to be after the current register frame.
2200 This is what ptrace() and gdb treats as the regular bsp value. */
2201 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2202 *val = extract_unsigned_integer (buf, 8);
2206 /* For all other registers, just unwind the value directly. */
2207 get_frame_register (this_frame, regnum, buf);
2208 *val = extract_unsigned_integer (buf, 8);
2212 if (gdbarch_debug >= 1)
2213 fprintf_unfiltered (gdb_stdlog,
2214 " access_reg: from cache: %4s=0x%s\n",
2215 (((unsigned) regnum <= IA64_NAT127_REGNUM)
2216 ? ia64_register_names[regnum] : "r??"),
2221 /* Libunwind callback accessor function for floating-point registers. */
2223 ia64_access_fpreg (unw_addr_space_t as, unw_regnum_t uw_regnum, unw_fpreg_t *val,
2224 int write, void *arg)
2226 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2227 struct frame_info *this_frame = arg;
2229 /* We never call any libunwind routines that need to write registers. */
2230 gdb_assert (!write);
2232 get_frame_register (this_frame, regnum, (char *) val);
2237 /* Libunwind callback accessor function for top-level rse registers. */
2239 ia64_access_rse_reg (unw_addr_space_t as, unw_regnum_t uw_regnum, unw_word_t *val,
2240 int write, void *arg)
2242 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2243 unw_word_t bsp, sof, sol, cfm, psr, ip;
2244 struct regcache *regcache = arg;
2245 long new_sof, old_sof;
2246 char buf[MAX_REGISTER_SIZE];
2248 /* We never call any libunwind routines that need to write registers. */
2249 gdb_assert (!write);
2254 /* Libunwind expects to see the pc value which means the slot number
2255 from the psr must be merged with the ip word address. */
2256 regcache_cooked_read (regcache, IA64_IP_REGNUM, buf);
2257 ip = extract_unsigned_integer (buf, 8);
2258 regcache_cooked_read (regcache, IA64_PSR_REGNUM, buf);
2259 psr = extract_unsigned_integer (buf, 8);
2260 *val = ip | ((psr >> 41) & 0x3);
2263 case UNW_IA64_AR_BSP:
2264 /* Libunwind expects to see the beginning of the current register
2265 frame so we must account for the fact that ptrace() will return a value
2266 for bsp that points *after* the current register frame. */
2267 regcache_cooked_read (regcache, IA64_BSP_REGNUM, buf);
2268 bsp = extract_unsigned_integer (buf, 8);
2269 regcache_cooked_read (regcache, IA64_CFM_REGNUM, buf);
2270 cfm = extract_unsigned_integer (buf, 8);
2272 *val = ia64_rse_skip_regs (bsp, -sof);
2275 case UNW_IA64_AR_BSPSTORE:
2276 /* Libunwind wants bspstore to be after the current register frame.
2277 This is what ptrace() and gdb treats as the regular bsp value. */
2278 regcache_cooked_read (regcache, IA64_BSP_REGNUM, buf);
2279 *val = extract_unsigned_integer (buf, 8);
2283 /* For all other registers, just unwind the value directly. */
2284 regcache_cooked_read (regcache, regnum, buf);
2285 *val = extract_unsigned_integer (buf, 8);
2289 if (gdbarch_debug >= 1)
2290 fprintf_unfiltered (gdb_stdlog,
2291 " access_rse_reg: from cache: %4s=0x%s\n",
2292 (((unsigned) regnum <= IA64_NAT127_REGNUM)
2293 ? ia64_register_names[regnum] : "r??"),
2299 /* Libunwind callback accessor function for top-level fp registers. */
2301 ia64_access_rse_fpreg (unw_addr_space_t as, unw_regnum_t uw_regnum,
2302 unw_fpreg_t *val, int write, void *arg)
2304 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2305 struct regcache *regcache = arg;
2307 /* We never call any libunwind routines that need to write registers. */
2308 gdb_assert (!write);
2310 regcache_cooked_read (regcache, regnum, (char *) val);
2315 /* Libunwind callback accessor function for accessing memory. */
2317 ia64_access_mem (unw_addr_space_t as,
2318 unw_word_t addr, unw_word_t *val,
2319 int write, void *arg)
2321 if (addr - KERNEL_START < ktab_size)
2323 unw_word_t *laddr = (unw_word_t*) ((char *) ktab
2324 + (addr - KERNEL_START));
2333 /* XXX do we need to normalize byte-order here? */
2335 return target_write_memory (addr, (char *) val, sizeof (unw_word_t));
2337 return target_read_memory (addr, (char *) val, sizeof (unw_word_t));
2340 /* Call low-level function to access the kernel unwind table. */
2342 getunwind_table (gdb_byte **buf_p)
2346 /* FIXME drow/2005-09-10: This code used to call
2347 ia64_linux_xfer_unwind_table directly to fetch the unwind table
2348 for the currently running ia64-linux kernel. That data should
2349 come from the core file and be accessed via the auxv vector; if
2350 we want to preserve fall back to the running kernel's table, then
2351 we should find a way to override the corefile layer's
2352 xfer_partial method. */
2354 x = target_read_alloc (¤t_target, TARGET_OBJECT_UNWIND_TABLE,
2360 /* Get the kernel unwind table. */
2362 get_kernel_table (unw_word_t ip, unw_dyn_info_t *di)
2364 static struct ia64_table_entry *etab;
2371 size = getunwind_table (&ktab_buf);
2373 return -UNW_ENOINFO;
2375 ktab = (struct ia64_table_entry *) ktab_buf;
2378 for (etab = ktab; etab->start_offset; ++etab)
2379 etab->info_offset += KERNEL_START;
2382 if (ip < ktab[0].start_offset || ip >= etab[-1].end_offset)
2383 return -UNW_ENOINFO;
2385 di->format = UNW_INFO_FORMAT_TABLE;
2387 di->start_ip = ktab[0].start_offset;
2388 di->end_ip = etab[-1].end_offset;
2389 di->u.ti.name_ptr = (unw_word_t) "<kernel>";
2390 di->u.ti.segbase = 0;
2391 di->u.ti.table_len = ((char *) etab - (char *) ktab) / sizeof (unw_word_t);
2392 di->u.ti.table_data = (unw_word_t *) ktab;
2394 if (gdbarch_debug >= 1)
2395 fprintf_unfiltered (gdb_stdlog, "get_kernel_table: found table `%s': "
2396 "segbase=0x%s, length=%s, gp=0x%s\n",
2397 (char *) di->u.ti.name_ptr,
2398 paddr_nz (di->u.ti.segbase),
2399 paddr_u (di->u.ti.table_len),
2404 /* Find the unwind table entry for a specified address. */
2406 ia64_find_unwind_table (struct objfile *objfile, unw_word_t ip,
2407 unw_dyn_info_t *dip, void **buf)
2409 Elf_Internal_Phdr *phdr, *p_text = NULL, *p_unwind = NULL;
2410 Elf_Internal_Ehdr *ehdr;
2411 unw_word_t segbase = 0;
2412 CORE_ADDR load_base;
2416 bfd = objfile->obfd;
2418 ehdr = elf_tdata (bfd)->elf_header;
2419 phdr = elf_tdata (bfd)->phdr;
2421 load_base = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2423 for (i = 0; i < ehdr->e_phnum; ++i)
2425 switch (phdr[i].p_type)
2428 if ((unw_word_t) (ip - load_base - phdr[i].p_vaddr)
2433 case PT_IA_64_UNWIND:
2434 p_unwind = phdr + i;
2442 if (!p_text || !p_unwind)
2443 return -UNW_ENOINFO;
2445 /* Verify that the segment that contains the IP also contains
2446 the static unwind table. If not, we may be in the Linux kernel's
2447 DSO gate page in which case the unwind table is another segment.
2448 Otherwise, we are dealing with runtime-generated code, for which we
2449 have no info here. */
2450 segbase = p_text->p_vaddr + load_base;
2452 if ((p_unwind->p_vaddr - p_text->p_vaddr) >= p_text->p_memsz)
2455 for (i = 0; i < ehdr->e_phnum; ++i)
2457 if (phdr[i].p_type == PT_LOAD
2458 && (p_unwind->p_vaddr - phdr[i].p_vaddr) < phdr[i].p_memsz)
2461 /* Get the segbase from the section containing the
2463 segbase = phdr[i].p_vaddr + load_base;
2467 return -UNW_ENOINFO;
2470 dip->start_ip = p_text->p_vaddr + load_base;
2471 dip->end_ip = dip->start_ip + p_text->p_memsz;
2472 dip->gp = ia64_find_global_pointer (ip);
2473 dip->format = UNW_INFO_FORMAT_REMOTE_TABLE;
2474 dip->u.rti.name_ptr = (unw_word_t) bfd_get_filename (bfd);
2475 dip->u.rti.segbase = segbase;
2476 dip->u.rti.table_len = p_unwind->p_memsz / sizeof (unw_word_t);
2477 dip->u.rti.table_data = p_unwind->p_vaddr + load_base;
2482 /* Libunwind callback accessor function to acquire procedure unwind-info. */
2484 ia64_find_proc_info_x (unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
2485 int need_unwind_info, void *arg)
2487 struct obj_section *sec = find_pc_section (ip);
2494 /* XXX This only works if the host and the target architecture are
2495 both ia64 and if the have (more or less) the same kernel
2497 if (get_kernel_table (ip, &di) < 0)
2498 return -UNW_ENOINFO;
2500 if (gdbarch_debug >= 1)
2501 fprintf_unfiltered (gdb_stdlog, "ia64_find_proc_info_x: 0x%s -> "
2502 "(name=`%s',segbase=0x%s,start=0x%s,end=0x%s,gp=0x%s,"
2503 "length=%s,data=0x%s)\n",
2504 paddr_nz (ip), (char *)di.u.ti.name_ptr,
2505 paddr_nz (di.u.ti.segbase),
2506 paddr_nz (di.start_ip), paddr_nz (di.end_ip),
2508 paddr_u (di.u.ti.table_len),
2509 paddr_nz ((CORE_ADDR)di.u.ti.table_data));
2513 ret = ia64_find_unwind_table (sec->objfile, ip, &di, &buf);
2517 if (gdbarch_debug >= 1)
2518 fprintf_unfiltered (gdb_stdlog, "ia64_find_proc_info_x: 0x%s -> "
2519 "(name=`%s',segbase=0x%s,start=0x%s,end=0x%s,gp=0x%s,"
2520 "length=%s,data=0x%s)\n",
2521 paddr_nz (ip), (char *)di.u.rti.name_ptr,
2522 paddr_nz (di.u.rti.segbase),
2523 paddr_nz (di.start_ip), paddr_nz (di.end_ip),
2525 paddr_u (di.u.rti.table_len),
2526 paddr_nz (di.u.rti.table_data));
2529 ret = libunwind_search_unwind_table (&as, ip, &di, pi, need_unwind_info,
2532 /* We no longer need the dyn info storage so free it. */
2538 /* Libunwind callback accessor function for cleanup. */
2540 ia64_put_unwind_info (unw_addr_space_t as,
2541 unw_proc_info_t *pip, void *arg)
2543 /* Nothing required for now. */
2546 /* Libunwind callback accessor function to get head of the dynamic
2547 unwind-info registration list. */
2549 ia64_get_dyn_info_list (unw_addr_space_t as,
2550 unw_word_t *dilap, void *arg)
2552 struct obj_section *text_sec;
2553 struct objfile *objfile;
2554 unw_word_t ip, addr;
2558 if (!libunwind_is_initialized ())
2559 return -UNW_ENOINFO;
2561 for (objfile = object_files; objfile; objfile = objfile->next)
2565 text_sec = objfile->sections + SECT_OFF_TEXT (objfile);
2566 ip = text_sec->addr;
2567 ret = ia64_find_unwind_table (objfile, ip, &di, &buf);
2570 addr = libunwind_find_dyn_list (as, &di, arg);
2571 /* We no longer need the dyn info storage so free it. */
2576 if (gdbarch_debug >= 1)
2577 fprintf_unfiltered (gdb_stdlog,
2578 "dynamic unwind table in objfile %s "
2579 "at 0x%s (gp=0x%s)\n",
2580 bfd_get_filename (objfile->obfd),
2581 paddr_nz (addr), paddr_nz (di.gp));
2587 return -UNW_ENOINFO;
2591 /* Frame interface functions for libunwind. */
2594 ia64_libunwind_frame_this_id (struct frame_info *this_frame, void **this_cache,
2595 struct frame_id *this_id)
2602 libunwind_frame_this_id (this_frame, this_cache, &id);
2603 if (frame_id_eq (id, null_frame_id))
2605 (*this_id) = null_frame_id;
2609 /* We must add the bsp as the special address for frame comparison
2611 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2612 bsp = extract_unsigned_integer (buf, 8);
2614 (*this_id) = frame_id_build_special (id.stack_addr, id.code_addr, bsp);
2616 if (gdbarch_debug >= 1)
2617 fprintf_unfiltered (gdb_stdlog,
2618 "libunwind frame id: code 0x%s, stack 0x%s, special 0x%s, this_frame %p\n",
2619 paddr_nz (id.code_addr), paddr_nz (id.stack_addr),
2620 paddr_nz (bsp), this_frame);
2623 static struct value *
2624 ia64_libunwind_frame_prev_register (struct frame_info *this_frame,
2625 void **this_cache, int regnum)
2628 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2631 if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
2632 reg = IA64_PR_REGNUM;
2633 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
2634 reg = IA64_UNAT_REGNUM;
2636 /* Let libunwind do most of the work. */
2637 val = libunwind_frame_prev_register (this_frame, this_cache, reg);
2639 if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
2643 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
2647 unsigned char buf[MAX_REGISTER_SIZE];
2649 /* Fetch predicate register rename base from current frame
2650 marker for this frame. */
2651 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2652 cfm = extract_unsigned_integer (buf, 8);
2653 rrb_pr = (cfm >> 32) & 0x3f;
2655 /* Adjust the register number to account for register rotation. */
2656 regnum = VP16_REGNUM + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
2658 prN_val = extract_bit_field (value_contents_all (val),
2659 regnum - VP0_REGNUM, 1);
2660 return frame_unwind_got_constant (this_frame, regnum, prN_val);
2663 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
2667 unatN_val = extract_bit_field (value_contents_all (val),
2668 regnum - IA64_NAT0_REGNUM, 1);
2669 return frame_unwind_got_constant (this_frame, regnum, unatN_val);
2672 else if (regnum == IA64_BSP_REGNUM)
2674 struct value *cfm_val;
2675 CORE_ADDR prev_bsp, prev_cfm;
2677 /* We want to calculate the previous bsp as the end of the previous
2678 register stack frame. This corresponds to what the hardware bsp
2679 register will be if we pop the frame back which is why we might
2680 have been called. We know that libunwind will pass us back the
2681 beginning of the current frame so we should just add sof to it. */
2682 prev_bsp = extract_unsigned_integer (value_contents_all (val), 8);
2683 cfm_val = libunwind_frame_prev_register (this_frame, this_cache,
2685 prev_cfm = extract_unsigned_integer (value_contents_all (cfm_val), 8);
2686 prev_bsp = rse_address_add (prev_bsp, (prev_cfm & 0x7f));
2688 return frame_unwind_got_constant (this_frame, regnum, prev_bsp);
2695 ia64_libunwind_frame_sniffer (const struct frame_unwind *self,
2696 struct frame_info *this_frame,
2699 if (libunwind_is_initialized ()
2700 && libunwind_frame_sniffer (self, this_frame, this_cache))
2706 static const struct frame_unwind ia64_libunwind_frame_unwind =
2709 ia64_libunwind_frame_this_id,
2710 ia64_libunwind_frame_prev_register,
2712 ia64_libunwind_frame_sniffer,
2713 libunwind_frame_dealloc_cache
2717 ia64_libunwind_sigtramp_frame_this_id (struct frame_info *this_frame,
2719 struct frame_id *this_id)
2726 libunwind_frame_this_id (this_frame, this_cache, &id);
2727 if (frame_id_eq (id, null_frame_id))
2729 (*this_id) = null_frame_id;
2733 /* We must add the bsp as the special address for frame comparison
2735 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2736 bsp = extract_unsigned_integer (buf, 8);
2738 /* For a sigtramp frame, we don't make the check for previous ip being 0. */
2739 (*this_id) = frame_id_build_special (id.stack_addr, id.code_addr, bsp);
2741 if (gdbarch_debug >= 1)
2742 fprintf_unfiltered (gdb_stdlog,
2743 "libunwind sigtramp frame id: code 0x%s, stack 0x%s, special 0x%s, this_frame %p\n",
2744 paddr_nz (id.code_addr), paddr_nz (id.stack_addr),
2745 paddr_nz (bsp), this_frame);
2748 static struct value *
2749 ia64_libunwind_sigtramp_frame_prev_register (struct frame_info *this_frame,
2750 void **this_cache, int regnum)
2752 struct value *prev_ip_val;
2755 /* If the previous frame pc value is 0, then we want to use the SIGCONTEXT
2756 method of getting previous registers. */
2757 prev_ip_val = libunwind_frame_prev_register (this_frame, this_cache,
2759 prev_ip = extract_unsigned_integer (value_contents_all (prev_ip_val), 8);
2763 void *tmp_cache = NULL;
2764 return ia64_sigtramp_frame_prev_register (this_frame, &tmp_cache,
2768 return ia64_libunwind_frame_prev_register (this_frame, this_cache, regnum);
2772 ia64_libunwind_sigtramp_frame_sniffer (const struct frame_unwind *self,
2773 struct frame_info *this_frame,
2776 if (libunwind_is_initialized ())
2778 if (libunwind_sigtramp_frame_sniffer (self, this_frame, this_cache))
2783 return ia64_sigtramp_frame_sniffer (self, this_frame, this_cache);
2786 static const struct frame_unwind ia64_libunwind_sigtramp_frame_unwind =
2789 ia64_libunwind_sigtramp_frame_this_id,
2790 ia64_libunwind_sigtramp_frame_prev_register,
2792 ia64_libunwind_sigtramp_frame_sniffer
2795 /* Set of libunwind callback acccessor functions. */
2796 static unw_accessors_t ia64_unw_accessors =
2798 ia64_find_proc_info_x,
2799 ia64_put_unwind_info,
2800 ia64_get_dyn_info_list,
2808 /* Set of special libunwind callback acccessor functions specific for accessing
2809 the rse registers. At the top of the stack, we want libunwind to figure out
2810 how to read r32 - r127. Though usually they are found sequentially in memory
2811 starting from $bof, this is not always true. */
2812 static unw_accessors_t ia64_unw_rse_accessors =
2814 ia64_find_proc_info_x,
2815 ia64_put_unwind_info,
2816 ia64_get_dyn_info_list,
2818 ia64_access_rse_reg,
2819 ia64_access_rse_fpreg,
2824 /* Set of ia64 gdb libunwind-frame callbacks and data for generic libunwind-frame code to use. */
2825 static struct libunwind_descr ia64_libunwind_descr =
2830 &ia64_unw_accessors,
2831 &ia64_unw_rse_accessors,
2834 #endif /* HAVE_LIBUNWIND_IA64_H */
2837 ia64_use_struct_convention (struct type *type)
2839 struct type *float_elt_type;
2841 /* Don't use the struct convention for anything but structure,
2842 union, or array types. */
2843 if (!(TYPE_CODE (type) == TYPE_CODE_STRUCT
2844 || TYPE_CODE (type) == TYPE_CODE_UNION
2845 || TYPE_CODE (type) == TYPE_CODE_ARRAY))
2848 /* HFAs are structures (or arrays) consisting entirely of floating
2849 point values of the same length. Up to 8 of these are returned
2850 in registers. Don't use the struct convention when this is the
2852 float_elt_type = is_float_or_hfa_type (type);
2853 if (float_elt_type != NULL
2854 && TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type) <= 8)
2857 /* Other structs of length 32 or less are returned in r8-r11.
2858 Don't use the struct convention for those either. */
2859 return TYPE_LENGTH (type) > 32;
2863 ia64_extract_return_value (struct type *type, struct regcache *regcache,
2866 struct type *float_elt_type;
2868 float_elt_type = is_float_or_hfa_type (type);
2869 if (float_elt_type != NULL)
2871 char from[MAX_REGISTER_SIZE];
2873 int regnum = IA64_FR8_REGNUM;
2874 int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type);
2878 regcache_cooked_read (regcache, regnum, from);
2879 convert_typed_floating (from, builtin_type_ia64_ext,
2880 (char *)valbuf + offset, float_elt_type);
2881 offset += TYPE_LENGTH (float_elt_type);
2889 int regnum = IA64_GR8_REGNUM;
2890 int reglen = TYPE_LENGTH (register_type (get_regcache_arch (regcache),
2892 int n = TYPE_LENGTH (type) / reglen;
2893 int m = TYPE_LENGTH (type) % reglen;
2898 regcache_cooked_read_unsigned (regcache, regnum, &val);
2899 memcpy ((char *)valbuf + offset, &val, reglen);
2906 regcache_cooked_read_unsigned (regcache, regnum, &val);
2907 memcpy ((char *)valbuf + offset, &val, m);
2913 ia64_store_return_value (struct type *type, struct regcache *regcache,
2914 const gdb_byte *valbuf)
2916 struct type *float_elt_type;
2918 float_elt_type = is_float_or_hfa_type (type);
2919 if (float_elt_type != NULL)
2921 char to[MAX_REGISTER_SIZE];
2923 int regnum = IA64_FR8_REGNUM;
2924 int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type);
2928 convert_typed_floating ((char *)valbuf + offset, float_elt_type,
2929 to, builtin_type_ia64_ext);
2930 regcache_cooked_write (regcache, regnum, to);
2931 offset += TYPE_LENGTH (float_elt_type);
2939 int regnum = IA64_GR8_REGNUM;
2940 int reglen = TYPE_LENGTH (register_type (get_regcache_arch (regcache),
2942 int n = TYPE_LENGTH (type) / reglen;
2943 int m = TYPE_LENGTH (type) % reglen;
2948 memcpy (&val, (char *)valbuf + offset, reglen);
2949 regcache_cooked_write_unsigned (regcache, regnum, val);
2956 memcpy (&val, (char *)valbuf + offset, m);
2957 regcache_cooked_write_unsigned (regcache, regnum, val);
2962 static enum return_value_convention
2963 ia64_return_value (struct gdbarch *gdbarch, struct type *func_type,
2964 struct type *valtype, struct regcache *regcache,
2965 gdb_byte *readbuf, const gdb_byte *writebuf)
2967 int struct_return = ia64_use_struct_convention (valtype);
2969 if (writebuf != NULL)
2971 gdb_assert (!struct_return);
2972 ia64_store_return_value (valtype, regcache, writebuf);
2975 if (readbuf != NULL)
2977 gdb_assert (!struct_return);
2978 ia64_extract_return_value (valtype, regcache, readbuf);
2982 return RETURN_VALUE_STRUCT_CONVENTION;
2984 return RETURN_VALUE_REGISTER_CONVENTION;
2988 is_float_or_hfa_type_recurse (struct type *t, struct type **etp)
2990 switch (TYPE_CODE (t))
2994 return TYPE_LENGTH (*etp) == TYPE_LENGTH (t);
3001 case TYPE_CODE_ARRAY:
3003 is_float_or_hfa_type_recurse (check_typedef (TYPE_TARGET_TYPE (t)),
3006 case TYPE_CODE_STRUCT:
3010 for (i = 0; i < TYPE_NFIELDS (t); i++)
3011 if (!is_float_or_hfa_type_recurse
3012 (check_typedef (TYPE_FIELD_TYPE (t, i)), etp))
3023 /* Determine if the given type is one of the floating point types or
3024 and HFA (which is a struct, array, or combination thereof whose
3025 bottom-most elements are all of the same floating point type). */
3027 static struct type *
3028 is_float_or_hfa_type (struct type *t)
3030 struct type *et = 0;
3032 return is_float_or_hfa_type_recurse (t, &et) ? et : 0;
3036 /* Return 1 if the alignment of T is such that the next even slot
3037 should be used. Return 0, if the next available slot should
3038 be used. (See section 8.5.1 of the IA-64 Software Conventions
3039 and Runtime manual). */
3042 slot_alignment_is_next_even (struct type *t)
3044 switch (TYPE_CODE (t))
3048 if (TYPE_LENGTH (t) > 8)
3052 case TYPE_CODE_ARRAY:
3054 slot_alignment_is_next_even (check_typedef (TYPE_TARGET_TYPE (t)));
3055 case TYPE_CODE_STRUCT:
3059 for (i = 0; i < TYPE_NFIELDS (t); i++)
3060 if (slot_alignment_is_next_even
3061 (check_typedef (TYPE_FIELD_TYPE (t, i))))
3070 /* Attempt to find (and return) the global pointer for the given
3073 This is a rather nasty bit of code searchs for the .dynamic section
3074 in the objfile corresponding to the pc of the function we're trying
3075 to call. Once it finds the addresses at which the .dynamic section
3076 lives in the child process, it scans the Elf64_Dyn entries for a
3077 DT_PLTGOT tag. If it finds one of these, the corresponding
3078 d_un.d_ptr value is the global pointer. */
3081 ia64_find_global_pointer (CORE_ADDR faddr)
3083 struct obj_section *faddr_sect;
3085 faddr_sect = find_pc_section (faddr);
3086 if (faddr_sect != NULL)
3088 struct obj_section *osect;
3090 ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
3092 if (strcmp (osect->the_bfd_section->name, ".dynamic") == 0)
3096 if (osect < faddr_sect->objfile->sections_end)
3101 while (addr < osect->endaddr)
3107 status = target_read_memory (addr, buf, sizeof (buf));
3110 tag = extract_signed_integer (buf, sizeof (buf));
3112 if (tag == DT_PLTGOT)
3114 CORE_ADDR global_pointer;
3116 status = target_read_memory (addr + 8, buf, sizeof (buf));
3119 global_pointer = extract_unsigned_integer (buf, sizeof (buf));
3122 return global_pointer;
3135 /* Given a function's address, attempt to find (and return) the
3136 corresponding (canonical) function descriptor. Return 0 if
3139 find_extant_func_descr (CORE_ADDR faddr)
3141 struct obj_section *faddr_sect;
3143 /* Return early if faddr is already a function descriptor. */
3144 faddr_sect = find_pc_section (faddr);
3145 if (faddr_sect && strcmp (faddr_sect->the_bfd_section->name, ".opd") == 0)
3148 if (faddr_sect != NULL)
3150 struct obj_section *osect;
3151 ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
3153 if (strcmp (osect->the_bfd_section->name, ".opd") == 0)
3157 if (osect < faddr_sect->objfile->sections_end)
3162 while (addr < osect->endaddr)
3168 status = target_read_memory (addr, buf, sizeof (buf));
3171 faddr2 = extract_signed_integer (buf, sizeof (buf));
3173 if (faddr == faddr2)
3183 /* Attempt to find a function descriptor corresponding to the
3184 given address. If none is found, construct one on the
3185 stack using the address at fdaptr. */
3188 find_func_descr (struct regcache *regcache, CORE_ADDR faddr, CORE_ADDR *fdaptr)
3192 fdesc = find_extant_func_descr (faddr);
3196 ULONGEST global_pointer;
3202 global_pointer = ia64_find_global_pointer (faddr);
3204 if (global_pointer == 0)
3205 regcache_cooked_read_unsigned (regcache,
3206 IA64_GR1_REGNUM, &global_pointer);
3208 store_unsigned_integer (buf, 8, faddr);
3209 store_unsigned_integer (buf + 8, 8, global_pointer);
3211 write_memory (fdesc, buf, 16);
3217 /* Use the following routine when printing out function pointers
3218 so the user can see the function address rather than just the
3219 function descriptor. */
3221 ia64_convert_from_func_ptr_addr (struct gdbarch *gdbarch, CORE_ADDR addr,
3222 struct target_ops *targ)
3224 struct obj_section *s;
3226 s = find_pc_section (addr);
3228 /* check if ADDR points to a function descriptor. */
3229 if (s && strcmp (s->the_bfd_section->name, ".opd") == 0)
3230 return read_memory_unsigned_integer (addr, 8);
3232 /* Normally, functions live inside a section that is executable.
3233 So, if ADDR points to a non-executable section, then treat it
3234 as a function descriptor and return the target address iff
3235 the target address itself points to a section that is executable. */
3236 if (s && (s->the_bfd_section->flags & SEC_CODE) == 0)
3238 CORE_ADDR pc = read_memory_unsigned_integer (addr, 8);
3239 struct obj_section *pc_section = find_pc_section (pc);
3241 if (pc_section && (pc_section->the_bfd_section->flags & SEC_CODE))
3245 /* There are also descriptors embedded in vtables. */
3248 struct minimal_symbol *minsym;
3250 minsym = lookup_minimal_symbol_by_pc (addr);
3252 if (minsym && is_vtable_name (SYMBOL_LINKAGE_NAME (minsym)))
3253 return read_memory_unsigned_integer (addr, 8);
3260 ia64_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp)
3266 ia64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
3267 struct regcache *regcache, CORE_ADDR bp_addr,
3268 int nargs, struct value **args, CORE_ADDR sp,
3269 int struct_return, CORE_ADDR struct_addr)
3275 int nslots, rseslots, memslots, slotnum, nfuncargs;
3277 ULONGEST bsp, cfm, pfs, new_bsp;
3278 CORE_ADDR funcdescaddr, pc, global_pointer;
3279 CORE_ADDR func_addr = find_function_addr (function, NULL);
3283 /* Count the number of slots needed for the arguments. */
3284 for (argno = 0; argno < nargs; argno++)
3287 type = check_typedef (value_type (arg));
3288 len = TYPE_LENGTH (type);
3290 if ((nslots & 1) && slot_alignment_is_next_even (type))
3293 if (TYPE_CODE (type) == TYPE_CODE_FUNC)
3296 nslots += (len + 7) / 8;
3299 /* Divvy up the slots between the RSE and the memory stack. */
3300 rseslots = (nslots > 8) ? 8 : nslots;
3301 memslots = nslots - rseslots;
3303 /* Allocate a new RSE frame. */
3304 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
3306 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
3307 new_bsp = rse_address_add (bsp, rseslots);
3308 regcache_cooked_write_unsigned (regcache, IA64_BSP_REGNUM, new_bsp);
3310 regcache_cooked_read_unsigned (regcache, IA64_PFS_REGNUM, &pfs);
3311 pfs &= 0xc000000000000000LL;
3312 pfs |= (cfm & 0xffffffffffffLL);
3313 regcache_cooked_write_unsigned (regcache, IA64_PFS_REGNUM, pfs);
3315 cfm &= 0xc000000000000000LL;
3317 regcache_cooked_write_unsigned (regcache, IA64_CFM_REGNUM, cfm);
3319 /* We will attempt to find function descriptors in the .opd segment,
3320 but if we can't we'll construct them ourselves. That being the
3321 case, we'll need to reserve space on the stack for them. */
3322 funcdescaddr = sp - nfuncargs * 16;
3323 funcdescaddr &= ~0xfLL;
3325 /* Adjust the stack pointer to it's new value. The calling conventions
3326 require us to have 16 bytes of scratch, plus whatever space is
3327 necessary for the memory slots and our function descriptors. */
3328 sp = sp - 16 - (memslots + nfuncargs) * 8;
3329 sp &= ~0xfLL; /* Maintain 16 byte alignment. */
3331 /* Place the arguments where they belong. The arguments will be
3332 either placed in the RSE backing store or on the memory stack.
3333 In addition, floating point arguments or HFAs are placed in
3334 floating point registers. */
3336 floatreg = IA64_FR8_REGNUM;
3337 for (argno = 0; argno < nargs; argno++)
3339 struct type *float_elt_type;
3342 type = check_typedef (value_type (arg));
3343 len = TYPE_LENGTH (type);
3345 /* Special handling for function parameters. */
3347 && TYPE_CODE (type) == TYPE_CODE_PTR
3348 && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC)
3351 ULONGEST faddr = extract_unsigned_integer (value_contents (arg), 8);
3352 store_unsigned_integer (val_buf, 8,
3353 find_func_descr (regcache, faddr,
3355 if (slotnum < rseslots)
3356 write_memory (rse_address_add (bsp, slotnum), val_buf, 8);
3358 write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8);
3365 /* Skip odd slot if necessary... */
3366 if ((slotnum & 1) && slot_alignment_is_next_even (type))
3374 memset (val_buf, 0, 8);
3375 memcpy (val_buf, value_contents (arg) + argoffset, (len > 8) ? 8 : len);
3377 if (slotnum < rseslots)
3378 write_memory (rse_address_add (bsp, slotnum), val_buf, 8);
3380 write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8);
3387 /* Handle floating point types (including HFAs). */
3388 float_elt_type = is_float_or_hfa_type (type);
3389 if (float_elt_type != NULL)
3392 len = TYPE_LENGTH (type);
3393 while (len > 0 && floatreg < IA64_FR16_REGNUM)
3395 char to[MAX_REGISTER_SIZE];
3396 convert_typed_floating (value_contents (arg) + argoffset, float_elt_type,
3397 to, builtin_type_ia64_ext);
3398 regcache_cooked_write (regcache, floatreg, (void *)to);
3400 argoffset += TYPE_LENGTH (float_elt_type);
3401 len -= TYPE_LENGTH (float_elt_type);
3406 /* Store the struct return value in r8 if necessary. */
3409 regcache_cooked_write_unsigned (regcache, IA64_GR8_REGNUM, (ULONGEST)struct_addr);
3412 global_pointer = ia64_find_global_pointer (func_addr);
3414 if (global_pointer != 0)
3415 regcache_cooked_write_unsigned (regcache, IA64_GR1_REGNUM, global_pointer);
3417 regcache_cooked_write_unsigned (regcache, IA64_BR0_REGNUM, bp_addr);
3419 regcache_cooked_write_unsigned (regcache, sp_regnum, sp);
3424 static struct frame_id
3425 ia64_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
3430 get_frame_register (this_frame, sp_regnum, buf);
3431 sp = extract_unsigned_integer (buf, 8);
3433 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
3434 bsp = extract_unsigned_integer (buf, 8);
3436 if (gdbarch_debug >= 1)
3437 fprintf_unfiltered (gdb_stdlog,
3438 "dummy frame id: code 0x%s, stack 0x%s, special 0x%s\n",
3439 paddr_nz (frame_pc_unwind (this_frame)),
3440 paddr_nz (sp), paddr_nz (bsp));
3442 return frame_id_build_special (sp, get_frame_pc (this_frame), bsp);
3446 ia64_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
3449 CORE_ADDR ip, psr, pc;
3451 frame_unwind_register (next_frame, IA64_IP_REGNUM, buf);
3452 ip = extract_unsigned_integer (buf, 8);
3453 frame_unwind_register (next_frame, IA64_PSR_REGNUM, buf);
3454 psr = extract_unsigned_integer (buf, 8);
3456 pc = (ip & ~0xf) | ((psr >> 41) & 3);
3461 ia64_print_insn (bfd_vma memaddr, struct disassemble_info *info)
3463 info->bytes_per_line = SLOT_MULTIPLIER;
3464 return print_insn_ia64 (memaddr, info);
3467 static struct gdbarch *
3468 ia64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
3470 struct gdbarch *gdbarch;
3471 struct gdbarch_tdep *tdep;
3473 /* If there is already a candidate, use it. */
3474 arches = gdbarch_list_lookup_by_info (arches, &info);
3476 return arches->gdbarch;
3478 tdep = xmalloc (sizeof (struct gdbarch_tdep));
3479 gdbarch = gdbarch_alloc (&info, tdep);
3481 tdep->sigcontext_register_address = 0;
3482 tdep->pc_in_sigtramp = 0;
3484 /* According to the ia64 specs, instructions that store long double
3485 floats in memory use a long-double format different than that
3486 used in the floating registers. The memory format matches the
3487 x86 extended float format which is 80 bits. An OS may choose to
3488 use this format (e.g. GNU/Linux) or choose to use a different
3489 format for storing long doubles (e.g. HPUX). In the latter case,
3490 the setting of the format may be moved/overridden in an
3491 OS-specific tdep file. */
3492 set_gdbarch_long_double_format (gdbarch, floatformats_i387_ext);
3494 set_gdbarch_short_bit (gdbarch, 16);
3495 set_gdbarch_int_bit (gdbarch, 32);
3496 set_gdbarch_long_bit (gdbarch, 64);
3497 set_gdbarch_long_long_bit (gdbarch, 64);
3498 set_gdbarch_float_bit (gdbarch, 32);
3499 set_gdbarch_double_bit (gdbarch, 64);
3500 set_gdbarch_long_double_bit (gdbarch, 128);
3501 set_gdbarch_ptr_bit (gdbarch, 64);
3503 set_gdbarch_num_regs (gdbarch, NUM_IA64_RAW_REGS);
3504 set_gdbarch_num_pseudo_regs (gdbarch, LAST_PSEUDO_REGNUM - FIRST_PSEUDO_REGNUM);
3505 set_gdbarch_sp_regnum (gdbarch, sp_regnum);
3506 set_gdbarch_fp0_regnum (gdbarch, IA64_FR0_REGNUM);
3508 set_gdbarch_register_name (gdbarch, ia64_register_name);
3509 set_gdbarch_register_type (gdbarch, ia64_register_type);
3511 set_gdbarch_pseudo_register_read (gdbarch, ia64_pseudo_register_read);
3512 set_gdbarch_pseudo_register_write (gdbarch, ia64_pseudo_register_write);
3513 set_gdbarch_dwarf2_reg_to_regnum (gdbarch, ia64_dwarf_reg_to_regnum);
3514 set_gdbarch_register_reggroup_p (gdbarch, ia64_register_reggroup_p);
3515 set_gdbarch_convert_register_p (gdbarch, ia64_convert_register_p);
3516 set_gdbarch_register_to_value (gdbarch, ia64_register_to_value);
3517 set_gdbarch_value_to_register (gdbarch, ia64_value_to_register);
3519 set_gdbarch_skip_prologue (gdbarch, ia64_skip_prologue);
3521 set_gdbarch_return_value (gdbarch, ia64_return_value);
3523 set_gdbarch_memory_insert_breakpoint (gdbarch, ia64_memory_insert_breakpoint);
3524 set_gdbarch_memory_remove_breakpoint (gdbarch, ia64_memory_remove_breakpoint);
3525 set_gdbarch_breakpoint_from_pc (gdbarch, ia64_breakpoint_from_pc);
3526 set_gdbarch_read_pc (gdbarch, ia64_read_pc);
3527 set_gdbarch_write_pc (gdbarch, ia64_write_pc);
3529 /* Settings for calling functions in the inferior. */
3530 set_gdbarch_push_dummy_call (gdbarch, ia64_push_dummy_call);
3531 set_gdbarch_frame_align (gdbarch, ia64_frame_align);
3532 set_gdbarch_dummy_id (gdbarch, ia64_dummy_id);
3534 set_gdbarch_unwind_pc (gdbarch, ia64_unwind_pc);
3535 #ifdef HAVE_LIBUNWIND_IA64_H
3536 frame_unwind_append_unwinder (gdbarch,
3537 &ia64_libunwind_sigtramp_frame_unwind);
3538 frame_unwind_append_unwinder (gdbarch, &ia64_libunwind_frame_unwind);
3539 frame_unwind_append_unwinder (gdbarch, &ia64_sigtramp_frame_unwind);
3540 libunwind_frame_set_descr (gdbarch, &ia64_libunwind_descr);
3542 frame_unwind_append_unwinder (gdbarch, &ia64_sigtramp_frame_unwind);
3544 frame_unwind_append_unwinder (gdbarch, &ia64_frame_unwind);
3545 frame_base_set_default (gdbarch, &ia64_frame_base);
3547 /* Settings that should be unnecessary. */
3548 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
3550 set_gdbarch_print_insn (gdbarch, ia64_print_insn);
3551 set_gdbarch_convert_from_func_ptr_addr (gdbarch, ia64_convert_from_func_ptr_addr);
3553 /* The virtual table contains 16-byte descriptors, not pointers to
3555 set_gdbarch_vtable_function_descriptors (gdbarch, 1);
3557 /* Hook in ABI-specific overrides, if they have been registered. */
3558 gdbarch_init_osabi (info, gdbarch);
3563 extern initialize_file_ftype _initialize_ia64_tdep; /* -Wmissing-prototypes */
3566 _initialize_ia64_tdep (void)
3568 /* Define the ia64 floating-point format to gdb. */
3569 builtin_type_ia64_ext =
3570 init_type (TYPE_CODE_FLT, 128 / 8,
3571 0, "builtin_type_ia64_ext", NULL);
3572 TYPE_FLOATFORMAT (builtin_type_ia64_ext) = floatformats_ia64_ext;
3574 gdbarch_register (bfd_arch_ia64, ia64_gdbarch_init, NULL);