1 /* Target-dependent code for the IA-64 for GDB, the GNU debugger.
3 Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include "symfile.h" /* for entry_point_address */
26 #include "arch-utils.h"
27 #include "floatformat.h"
33 #include "elf/common.h" /* for DT_PLTGOT value */
36 /* Hook for determining the global pointer when calling functions in
37 the inferior under AIX. The initialization code in ia64-aix-nat.c
38 sets this hook to the address of a function which will find the
39 global pointer for a given address.
41 The generic code which uses the dynamic section in the inferior for
42 finding the global pointer is not of much use on AIX since the
43 values obtained from the inferior have not been relocated. */
45 CORE_ADDR (*native_find_global_pointer) (CORE_ADDR) = 0;
47 /* An enumeration of the different IA-64 instruction types. */
49 typedef enum instruction_type
51 A, /* Integer ALU ; I-unit or M-unit */
52 I, /* Non-ALU integer; I-unit */
53 M, /* Memory ; M-unit */
54 F, /* Floating-point ; F-unit */
55 B, /* Branch ; B-unit */
56 L, /* Extended (L+X) ; I-unit */
57 X, /* Extended (L+X) ; I-unit */
58 undefined /* undefined or reserved */
61 /* We represent IA-64 PC addresses as the value of the instruction
62 pointer or'd with some bit combination in the low nibble which
63 represents the slot number in the bundle addressed by the
64 instruction pointer. The problem is that the Linux kernel
65 multiplies its slot numbers (for exceptions) by one while the
66 disassembler multiplies its slot numbers by 6. In addition, I've
67 heard it said that the simulator uses 1 as the multiplier.
69 I've fixed the disassembler so that the bytes_per_line field will
70 be the slot multiplier. If bytes_per_line comes in as zero, it
71 is set to six (which is how it was set up initially). -- objdump
72 displays pretty disassembly dumps with this value. For our purposes,
73 we'll set bytes_per_line to SLOT_MULTIPLIER. This is okay since we
74 never want to also display the raw bytes the way objdump does. */
76 #define SLOT_MULTIPLIER 1
78 /* Length in bytes of an instruction bundle */
82 /* FIXME: These extern declarations should go in ia64-tdep.h. */
83 extern CORE_ADDR ia64_linux_sigcontext_register_address (CORE_ADDR, int);
84 extern CORE_ADDR ia64_aix_sigcontext_register_address (CORE_ADDR, int);
86 static gdbarch_init_ftype ia64_gdbarch_init;
88 static gdbarch_register_name_ftype ia64_register_name;
89 static gdbarch_register_raw_size_ftype ia64_register_raw_size;
90 static gdbarch_register_virtual_size_ftype ia64_register_virtual_size;
91 static gdbarch_register_virtual_type_ftype ia64_register_virtual_type;
92 static gdbarch_register_byte_ftype ia64_register_byte;
93 static gdbarch_breakpoint_from_pc_ftype ia64_breakpoint_from_pc;
94 static gdbarch_skip_prologue_ftype ia64_skip_prologue;
95 static gdbarch_deprecated_extract_return_value_ftype ia64_extract_return_value;
96 static gdbarch_deprecated_extract_struct_value_address_ftype ia64_extract_struct_value_address;
97 static gdbarch_use_struct_convention_ftype ia64_use_struct_convention;
98 static gdbarch_frameless_function_invocation_ftype ia64_frameless_function_invocation;
99 static gdbarch_deprecated_saved_pc_after_call_ftype ia64_saved_pc_after_call;
100 static void ia64_pop_frame_regular (struct frame_info *frame);
101 static struct type *is_float_or_hfa_type (struct type *t);
103 static int ia64_num_regs = 590;
105 static int pc_regnum = IA64_IP_REGNUM;
106 static int sp_regnum = IA64_GR12_REGNUM;
107 static int fp_regnum = IA64_VFP_REGNUM;
108 static int lr_regnum = IA64_VRAP_REGNUM;
110 static LONGEST ia64_call_dummy_words[] = {0};
112 /* Array of register names; There should be ia64_num_regs strings in
115 static char *ia64_register_names[] =
116 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
117 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
118 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
119 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
120 "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39",
121 "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47",
122 "r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55",
123 "r56", "r57", "r58", "r59", "r60", "r61", "r62", "r63",
124 "r64", "r65", "r66", "r67", "r68", "r69", "r70", "r71",
125 "r72", "r73", "r74", "r75", "r76", "r77", "r78", "r79",
126 "r80", "r81", "r82", "r83", "r84", "r85", "r86", "r87",
127 "r88", "r89", "r90", "r91", "r92", "r93", "r94", "r95",
128 "r96", "r97", "r98", "r99", "r100", "r101", "r102", "r103",
129 "r104", "r105", "r106", "r107", "r108", "r109", "r110", "r111",
130 "r112", "r113", "r114", "r115", "r116", "r117", "r118", "r119",
131 "r120", "r121", "r122", "r123", "r124", "r125", "r126", "r127",
133 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
134 "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
135 "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
136 "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
137 "f32", "f33", "f34", "f35", "f36", "f37", "f38", "f39",
138 "f40", "f41", "f42", "f43", "f44", "f45", "f46", "f47",
139 "f48", "f49", "f50", "f51", "f52", "f53", "f54", "f55",
140 "f56", "f57", "f58", "f59", "f60", "f61", "f62", "f63",
141 "f64", "f65", "f66", "f67", "f68", "f69", "f70", "f71",
142 "f72", "f73", "f74", "f75", "f76", "f77", "f78", "f79",
143 "f80", "f81", "f82", "f83", "f84", "f85", "f86", "f87",
144 "f88", "f89", "f90", "f91", "f92", "f93", "f94", "f95",
145 "f96", "f97", "f98", "f99", "f100", "f101", "f102", "f103",
146 "f104", "f105", "f106", "f107", "f108", "f109", "f110", "f111",
147 "f112", "f113", "f114", "f115", "f116", "f117", "f118", "f119",
148 "f120", "f121", "f122", "f123", "f124", "f125", "f126", "f127",
150 "p0", "p1", "p2", "p3", "p4", "p5", "p6", "p7",
151 "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15",
152 "p16", "p17", "p18", "p19", "p20", "p21", "p22", "p23",
153 "p24", "p25", "p26", "p27", "p28", "p29", "p30", "p31",
154 "p32", "p33", "p34", "p35", "p36", "p37", "p38", "p39",
155 "p40", "p41", "p42", "p43", "p44", "p45", "p46", "p47",
156 "p48", "p49", "p50", "p51", "p52", "p53", "p54", "p55",
157 "p56", "p57", "p58", "p59", "p60", "p61", "p62", "p63",
159 "b0", "b1", "b2", "b3", "b4", "b5", "b6", "b7",
163 "pr", "ip", "psr", "cfm",
165 "kr0", "kr1", "kr2", "kr3", "kr4", "kr5", "kr6", "kr7",
166 "", "", "", "", "", "", "", "",
167 "rsc", "bsp", "bspstore", "rnat",
169 "eflag", "csd", "ssd", "cflg", "fsr", "fir", "fdr", "",
170 "ccv", "", "", "", "unat", "", "", "",
171 "fpsr", "", "", "", "itc",
172 "", "", "", "", "", "", "", "", "", "",
173 "", "", "", "", "", "", "", "", "",
175 "", "", "", "", "", "", "", "", "", "",
176 "", "", "", "", "", "", "", "", "", "",
177 "", "", "", "", "", "", "", "", "", "",
178 "", "", "", "", "", "", "", "", "", "",
179 "", "", "", "", "", "", "", "", "", "",
180 "", "", "", "", "", "", "", "", "", "",
182 "nat0", "nat1", "nat2", "nat3", "nat4", "nat5", "nat6", "nat7",
183 "nat8", "nat9", "nat10", "nat11", "nat12", "nat13", "nat14", "nat15",
184 "nat16", "nat17", "nat18", "nat19", "nat20", "nat21", "nat22", "nat23",
185 "nat24", "nat25", "nat26", "nat27", "nat28", "nat29", "nat30", "nat31",
186 "nat32", "nat33", "nat34", "nat35", "nat36", "nat37", "nat38", "nat39",
187 "nat40", "nat41", "nat42", "nat43", "nat44", "nat45", "nat46", "nat47",
188 "nat48", "nat49", "nat50", "nat51", "nat52", "nat53", "nat54", "nat55",
189 "nat56", "nat57", "nat58", "nat59", "nat60", "nat61", "nat62", "nat63",
190 "nat64", "nat65", "nat66", "nat67", "nat68", "nat69", "nat70", "nat71",
191 "nat72", "nat73", "nat74", "nat75", "nat76", "nat77", "nat78", "nat79",
192 "nat80", "nat81", "nat82", "nat83", "nat84", "nat85", "nat86", "nat87",
193 "nat88", "nat89", "nat90", "nat91", "nat92", "nat93", "nat94", "nat95",
194 "nat96", "nat97", "nat98", "nat99", "nat100","nat101","nat102","nat103",
195 "nat104","nat105","nat106","nat107","nat108","nat109","nat110","nat111",
196 "nat112","nat113","nat114","nat115","nat116","nat117","nat118","nat119",
197 "nat120","nat121","nat122","nat123","nat124","nat125","nat126","nat127",
200 struct frame_extra_info
202 CORE_ADDR bsp; /* points at r32 for the current frame */
203 CORE_ADDR cfm; /* cfm value for current frame */
204 int sof; /* Size of frame (decoded from cfm value) */
205 int sol; /* Size of locals (decoded from cfm value) */
206 CORE_ADDR after_prologue;
207 /* Address of first instruction after the last
208 prologue instruction; Note that there may
209 be instructions from the function's body
210 intermingled with the prologue. */
211 int mem_stack_frame_size;
212 /* Size of the memory stack frame (may be zero),
213 or -1 if it has not been determined yet. */
214 int fp_reg; /* Register number (if any) used a frame pointer
215 for this frame. 0 if no register is being used
216 as the frame pointer. */
221 int os_ident; /* From the ELF header, one of the ELFOSABI_
222 constants: ELFOSABI_LINUX, ELFOSABI_AIX,
224 CORE_ADDR (*sigcontext_register_address) (CORE_ADDR, int);
225 /* OS specific function which, given a frame address
226 and register number, returns the offset to the
227 given register from the start of the frame. */
228 CORE_ADDR (*find_global_pointer) (CORE_ADDR);
231 #define SIGCONTEXT_REGISTER_ADDRESS \
232 (gdbarch_tdep (current_gdbarch)->sigcontext_register_address)
233 #define FIND_GLOBAL_POINTER \
234 (gdbarch_tdep (current_gdbarch)->find_global_pointer)
237 ia64_register_name (int reg)
239 return ia64_register_names[reg];
243 ia64_register_raw_size (int reg)
245 return (IA64_FR0_REGNUM <= reg && reg <= IA64_FR127_REGNUM) ? 16 : 8;
249 ia64_register_virtual_size (int reg)
251 return (IA64_FR0_REGNUM <= reg && reg <= IA64_FR127_REGNUM) ? 16 : 8;
254 /* Return true iff register N's virtual format is different from
257 ia64_register_convertible (int nr)
259 return (IA64_FR0_REGNUM <= nr && nr <= IA64_FR127_REGNUM);
262 const struct floatformat floatformat_ia64_ext =
264 floatformat_little, 82, 0, 1, 17, 65535, 0x1ffff, 18, 64,
265 floatformat_intbit_yes
269 ia64_register_convert_to_virtual (int regnum, struct type *type,
270 char *from, char *to)
272 if (regnum >= IA64_FR0_REGNUM && regnum <= IA64_FR127_REGNUM)
275 floatformat_to_doublest (&floatformat_ia64_ext, from, &val);
276 deprecated_store_floating (to, TYPE_LENGTH(type), val);
279 error("ia64_register_convert_to_virtual called with non floating point register number");
283 ia64_register_convert_to_raw (struct type *type, int regnum,
284 char *from, char *to)
286 if (regnum >= IA64_FR0_REGNUM && regnum <= IA64_FR127_REGNUM)
288 DOUBLEST val = deprecated_extract_floating (from, TYPE_LENGTH(type));
289 floatformat_from_doublest (&floatformat_ia64_ext, &val, to);
292 error("ia64_register_convert_to_raw called with non floating point register number");
296 ia64_register_virtual_type (int reg)
298 if (reg >= IA64_FR0_REGNUM && reg <= IA64_FR127_REGNUM)
299 return builtin_type_long_double;
301 return builtin_type_long;
305 ia64_register_byte (int reg)
308 (reg <= IA64_FR0_REGNUM ? 0 : 8 * ((reg > IA64_FR127_REGNUM) ? 128 : reg - IA64_FR0_REGNUM));
311 /* Read the given register from a sigcontext structure in the
315 read_sigcontext_register (struct frame_info *frame, int regnum)
320 internal_error (__FILE__, __LINE__,
321 "read_sigcontext_register: NULL frame");
322 if (!(get_frame_type (frame) == SIGTRAMP_FRAME))
323 internal_error (__FILE__, __LINE__,
324 "read_sigcontext_register: frame not a signal trampoline");
325 if (SIGCONTEXT_REGISTER_ADDRESS == 0)
326 internal_error (__FILE__, __LINE__,
327 "read_sigcontext_register: SIGCONTEXT_REGISTER_ADDRESS is 0");
329 regaddr = SIGCONTEXT_REGISTER_ADDRESS (get_frame_base (frame), regnum);
331 return read_memory_integer (regaddr, REGISTER_RAW_SIZE (regnum));
333 internal_error (__FILE__, __LINE__,
334 "read_sigcontext_register: Register %d not in struct sigcontext", regnum);
337 /* Extract ``len'' bits from an instruction bundle starting at
341 extract_bit_field (char *bundle, int from, int len)
343 long long result = 0LL;
345 int from_byte = from / 8;
346 int to_byte = to / 8;
347 unsigned char *b = (unsigned char *) bundle;
353 if (from_byte == to_byte)
354 c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8);
355 result = c >> (from % 8);
356 lshift = 8 - (from % 8);
358 for (i = from_byte+1; i < to_byte; i++)
360 result |= ((long long) b[i]) << lshift;
364 if (from_byte < to_byte && (to % 8 != 0))
367 c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8);
368 result |= ((long long) c) << lshift;
374 /* Replace the specified bits in an instruction bundle */
377 replace_bit_field (char *bundle, long long val, int from, int len)
380 int from_byte = from / 8;
381 int to_byte = to / 8;
382 unsigned char *b = (unsigned char *) bundle;
385 if (from_byte == to_byte)
387 unsigned char left, right;
389 left = (c >> (to % 8)) << (to % 8);
390 right = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8);
391 c = (unsigned char) (val & 0xff);
392 c = (unsigned char) (c << (from % 8 + 8 - to % 8)) >> (8 - to % 8);
400 c = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8);
401 c = c | (val << (from % 8));
403 val >>= 8 - from % 8;
405 for (i = from_byte+1; i < to_byte; i++)
414 unsigned char cv = (unsigned char) val;
416 c = c >> (to % 8) << (to % 8);
417 c |= ((unsigned char) (cv << (8 - to % 8))) >> (8 - to % 8);
423 /* Return the contents of slot N (for N = 0, 1, or 2) in
424 and instruction bundle */
427 slotN_contents (char *bundle, int slotnum)
429 return extract_bit_field (bundle, 5+41*slotnum, 41);
432 /* Store an instruction in an instruction bundle */
435 replace_slotN_contents (char *bundle, long long instr, int slotnum)
437 replace_bit_field (bundle, instr, 5+41*slotnum, 41);
440 static enum instruction_type template_encoding_table[32][3] =
442 { M, I, I }, /* 00 */
443 { M, I, I }, /* 01 */
444 { M, I, I }, /* 02 */
445 { M, I, I }, /* 03 */
446 { M, L, X }, /* 04 */
447 { M, L, X }, /* 05 */
448 { undefined, undefined, undefined }, /* 06 */
449 { undefined, undefined, undefined }, /* 07 */
450 { M, M, I }, /* 08 */
451 { M, M, I }, /* 09 */
452 { M, M, I }, /* 0A */
453 { M, M, I }, /* 0B */
454 { M, F, I }, /* 0C */
455 { M, F, I }, /* 0D */
456 { M, M, F }, /* 0E */
457 { M, M, F }, /* 0F */
458 { M, I, B }, /* 10 */
459 { M, I, B }, /* 11 */
460 { M, B, B }, /* 12 */
461 { M, B, B }, /* 13 */
462 { undefined, undefined, undefined }, /* 14 */
463 { undefined, undefined, undefined }, /* 15 */
464 { B, B, B }, /* 16 */
465 { B, B, B }, /* 17 */
466 { M, M, B }, /* 18 */
467 { M, M, B }, /* 19 */
468 { undefined, undefined, undefined }, /* 1A */
469 { undefined, undefined, undefined }, /* 1B */
470 { M, F, B }, /* 1C */
471 { M, F, B }, /* 1D */
472 { undefined, undefined, undefined }, /* 1E */
473 { undefined, undefined, undefined }, /* 1F */
476 /* Fetch and (partially) decode an instruction at ADDR and return the
477 address of the next instruction to fetch. */
480 fetch_instruction (CORE_ADDR addr, instruction_type *it, long long *instr)
482 char bundle[BUNDLE_LEN];
483 int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER;
487 /* Warn about slot numbers greater than 2. We used to generate
488 an error here on the assumption that the user entered an invalid
489 address. But, sometimes GDB itself requests an invalid address.
490 This can (easily) happen when execution stops in a function for
491 which there are no symbols. The prologue scanner will attempt to
492 find the beginning of the function - if the nearest symbol
493 happens to not be aligned on a bundle boundary (16 bytes), the
494 resulting starting address will cause GDB to think that the slot
497 So we warn about it and set the slot number to zero. It is
498 not necessarily a fatal condition, particularly if debugging
499 at the assembly language level. */
502 warning ("Can't fetch instructions for slot numbers greater than 2.\n"
503 "Using slot 0 instead");
509 val = target_read_memory (addr, bundle, BUNDLE_LEN);
514 *instr = slotN_contents (bundle, slotnum);
515 template = extract_bit_field (bundle, 0, 5);
516 *it = template_encoding_table[(int)template][slotnum];
518 if (slotnum == 2 || (slotnum == 1 && *it == L))
521 addr += (slotnum + 1) * SLOT_MULTIPLIER;
526 /* There are 5 different break instructions (break.i, break.b,
527 break.m, break.f, and break.x), but they all have the same
528 encoding. (The five bit template in the low five bits of the
529 instruction bundle distinguishes one from another.)
531 The runtime architecture manual specifies that break instructions
532 used for debugging purposes must have the upper two bits of the 21
533 bit immediate set to a 0 and a 1 respectively. A breakpoint
534 instruction encodes the most significant bit of its 21 bit
535 immediate at bit 36 of the 41 bit instruction. The penultimate msb
536 is at bit 25 which leads to the pattern below.
538 Originally, I had this set up to do, e.g, a "break.i 0x80000" But
539 it turns out that 0x80000 was used as the syscall break in the early
540 simulators. So I changed the pattern slightly to do "break.i 0x080001"
541 instead. But that didn't work either (I later found out that this
542 pattern was used by the simulator that I was using.) So I ended up
543 using the pattern seen below. */
546 #define IA64_BREAKPOINT 0x00002000040LL
548 #define IA64_BREAKPOINT 0x00003333300LL
551 ia64_memory_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
553 char bundle[BUNDLE_LEN];
554 int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER;
560 error("Can't insert breakpoint for slot numbers greater than 2.");
564 val = target_read_memory (addr, bundle, BUNDLE_LEN);
566 /* Check for L type instruction in 2nd slot, if present then
567 bump up the slot number to the 3rd slot */
568 template = extract_bit_field (bundle, 0, 5);
569 if (slotnum == 1 && template_encoding_table[template][1] == L)
574 instr = slotN_contents (bundle, slotnum);
575 memcpy(contents_cache, &instr, sizeof(instr));
576 replace_slotN_contents (bundle, IA64_BREAKPOINT, slotnum);
578 target_write_memory (addr, bundle, BUNDLE_LEN);
584 ia64_memory_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
586 char bundle[BUNDLE_LEN];
587 int slotnum = (addr & 0x0f) / SLOT_MULTIPLIER;
594 val = target_read_memory (addr, bundle, BUNDLE_LEN);
596 /* Check for L type instruction in 2nd slot, if present then
597 bump up the slot number to the 3rd slot */
598 template = extract_bit_field (bundle, 0, 5);
599 if (slotnum == 1 && template_encoding_table[template][1] == L)
604 memcpy (&instr, contents_cache, sizeof instr);
605 replace_slotN_contents (bundle, instr, slotnum);
607 target_write_memory (addr, bundle, BUNDLE_LEN);
612 /* We don't really want to use this, but remote.c needs to call it in order
613 to figure out if Z-packets are supported or not. Oh, well. */
614 const unsigned char *
615 ia64_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
617 static unsigned char breakpoint[] =
618 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
619 *lenptr = sizeof (breakpoint);
627 ia64_read_pc (ptid_t ptid)
629 CORE_ADDR psr_value = read_register_pid (IA64_PSR_REGNUM, ptid);
630 CORE_ADDR pc_value = read_register_pid (IA64_IP_REGNUM, ptid);
631 int slot_num = (psr_value >> 41) & 3;
633 return pc_value | (slot_num * SLOT_MULTIPLIER);
637 ia64_write_pc (CORE_ADDR new_pc, ptid_t ptid)
639 int slot_num = (int) (new_pc & 0xf) / SLOT_MULTIPLIER;
640 CORE_ADDR psr_value = read_register_pid (IA64_PSR_REGNUM, ptid);
641 psr_value &= ~(3LL << 41);
642 psr_value |= (CORE_ADDR)(slot_num & 0x3) << 41;
646 write_register_pid (IA64_PSR_REGNUM, psr_value, ptid);
647 write_register_pid (IA64_IP_REGNUM, new_pc, ptid);
650 #define IS_NaT_COLLECTION_ADDR(addr) ((((addr) >> 3) & 0x3f) == 0x3f)
652 /* Returns the address of the slot that's NSLOTS slots away from
653 the address ADDR. NSLOTS may be positive or negative. */
655 rse_address_add(CORE_ADDR addr, int nslots)
658 int mandatory_nat_slots = nslots / 63;
659 int direction = nslots < 0 ? -1 : 1;
661 new_addr = addr + 8 * (nslots + mandatory_nat_slots);
663 if ((new_addr >> 9) != ((addr + 8 * 64 * mandatory_nat_slots) >> 9))
664 new_addr += 8 * direction;
666 if (IS_NaT_COLLECTION_ADDR(new_addr))
667 new_addr += 8 * direction;
672 /* The IA-64 frame chain is a bit odd. We won't always have a frame
673 pointer, so we use the SP value as the FP for the purpose of
674 creating a frame. There is sometimes a register (not fixed) which
675 is used as a frame pointer. When this register exists, it is not
676 especially hard to determine which one is being used. It isn't
677 even really hard to compute the frame chain, but it can be
678 computationally expensive. So, instead of making life difficult
679 (and slow), we pick a more convenient representation of the frame
680 chain, knowing that we'll have to make some small adjustments in
681 other places. (E.g, note that deprecated_read_fp() is actually
682 read_sp() in ia64_gdbarch_init() below.)
684 Okay, so what is the frame chain exactly? It'll be the SP value
685 at the time that the function in question was entered.
687 Note that this *should* actually the frame pointer for the current
688 function! But as I note above, if we were to attempt to find the
689 address of the beginning of the previous frame, we'd waste a lot
690 of cycles for no good reason. So instead, we simply choose to
691 represent the frame chain as the end of the previous frame instead
695 ia64_frame_chain (struct frame_info *frame)
697 if ((get_frame_type (frame) == SIGTRAMP_FRAME))
698 return read_sigcontext_register (frame, sp_regnum);
699 else if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (frame),
700 get_frame_base (frame),
701 get_frame_base (frame)))
702 return get_frame_base (frame);
705 DEPRECATED_FRAME_INIT_SAVED_REGS (frame);
706 if (get_frame_saved_regs (frame)[IA64_VFP_REGNUM])
707 return read_memory_integer (get_frame_saved_regs (frame)[IA64_VFP_REGNUM], 8);
709 return (get_frame_base (frame)
710 + get_frame_extra_info (frame)->mem_stack_frame_size);
715 ia64_frame_saved_pc (struct frame_info *frame)
717 if ((get_frame_type (frame) == SIGTRAMP_FRAME))
718 return read_sigcontext_register (frame, pc_regnum);
719 else if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (frame),
720 get_frame_base (frame),
721 get_frame_base (frame)))
722 return deprecated_read_register_dummy (get_frame_pc (frame),
723 get_frame_base (frame), pc_regnum);
726 DEPRECATED_FRAME_INIT_SAVED_REGS (frame);
728 if (get_frame_saved_regs (frame)[IA64_VRAP_REGNUM])
729 return read_memory_integer (get_frame_saved_regs (frame)[IA64_VRAP_REGNUM], 8);
730 else if (get_next_frame (frame)
731 && (get_frame_type (get_next_frame (frame)) == SIGTRAMP_FRAME))
732 return read_sigcontext_register (get_next_frame (frame), IA64_BR0_REGNUM);
733 else /* either frameless, or not far enough along in the prologue... */
734 return ia64_saved_pc_after_call (frame);
738 /* Limit the number of skipped non-prologue instructions since examining
739 of the prologue is expensive. */
740 static int max_skip_non_prologue_insns = 40;
742 /* Given PC representing the starting address of a function, and
743 LIM_PC which is the (sloppy) limit to which to scan when looking
744 for a prologue, attempt to further refine this limit by using
745 the line data in the symbol table. If successful, a better guess
746 on where the prologue ends is returned, otherwise the previous
747 value of lim_pc is returned. TRUST_LIMIT is a pointer to a flag
748 which will be set to indicate whether the returned limit may be
749 used with no further scanning in the event that the function is
753 refine_prologue_limit (CORE_ADDR pc, CORE_ADDR lim_pc, int *trust_limit)
755 struct symtab_and_line prologue_sal;
756 CORE_ADDR start_pc = pc;
758 /* Start off not trusting the limit. */
761 prologue_sal = find_pc_line (pc, 0);
762 if (prologue_sal.line != 0)
765 CORE_ADDR addr = prologue_sal.end;
767 /* Handle the case in which compiler's optimizer/scheduler
768 has moved instructions into the prologue. We scan ahead
769 in the function looking for address ranges whose corresponding
770 line number is less than or equal to the first one that we
771 found for the function. (It can be less than when the
772 scheduler puts a body instruction before the first prologue
774 for (i = 2 * max_skip_non_prologue_insns;
775 i > 0 && (lim_pc == 0 || addr < lim_pc);
778 struct symtab_and_line sal;
780 sal = find_pc_line (addr, 0);
783 if (sal.line <= prologue_sal.line
784 && sal.symtab == prologue_sal.symtab)
791 if (lim_pc == 0 || prologue_sal.end < lim_pc)
793 lim_pc = prologue_sal.end;
794 if (start_pc == get_pc_function_start (lim_pc))
801 #define isScratch(_regnum_) ((_regnum_) == 2 || (_regnum_) == 3 \
802 || (8 <= (_regnum_) && (_regnum_) <= 11) \
803 || (14 <= (_regnum_) && (_regnum_) <= 31))
804 #define imm9(_instr_) \
805 ( ((((_instr_) & 0x01000000000LL) ? -1 : 0) << 8) \
806 | (((_instr_) & 0x00008000000LL) >> 20) \
807 | (((_instr_) & 0x00000001fc0LL) >> 6))
810 examine_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct frame_info *frame)
813 CORE_ADDR last_prologue_pc = pc;
816 int do_fsr_stuff = 0;
821 int unat_save_reg = 0;
823 int mem_stack_frame_size = 0;
825 CORE_ADDR spill_addr = 0;
828 char reg_contents[256];
832 memset (instores, 0, sizeof instores);
833 memset (infpstores, 0, sizeof infpstores);
834 memset (reg_contents, 0, sizeof reg_contents);
836 if (frame && !get_frame_saved_regs (frame))
838 frame_saved_regs_zalloc (frame);
844 && get_frame_extra_info (frame)->after_prologue != 0
845 && get_frame_extra_info (frame)->after_prologue <= lim_pc)
846 return get_frame_extra_info (frame)->after_prologue;
848 lim_pc = refine_prologue_limit (pc, lim_pc, &trust_limit);
849 next_pc = fetch_instruction (pc, &it, &instr);
851 /* We want to check if we have a recognizable function start before we
852 look ahead for a prologue. */
853 if (pc < lim_pc && next_pc
854 && it == M && ((instr & 0x1ee0000003fLL) == 0x02c00000000LL))
856 /* alloc - start of a regular function. */
857 int sor = (int) ((instr & 0x00078000000LL) >> 27);
858 int sol = (int) ((instr & 0x00007f00000LL) >> 20);
859 int sof = (int) ((instr & 0x000000fe000LL) >> 13);
860 /* Okay, so sor, sol, and sof aren't used right now; but perhaps
861 we could compare against the size given to us via the cfm as
862 either a sanity check or possibly to see if the frame has been
863 changed by a later alloc instruction... */
864 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
866 last_prologue_pc = next_pc;
871 /* Look for a leaf routine. */
872 if (pc < lim_pc && next_pc
873 && (it == I || it == M)
874 && ((instr & 0x1ee00000000LL) == 0x10800000000LL))
876 /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */
877 int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13)
878 | ((instr & 0x001f8000000LL) >> 20)
879 | ((instr & 0x000000fe000LL) >> 13));
880 int rM = (int) ((instr & 0x00007f00000LL) >> 20);
881 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
882 int qp = (int) (instr & 0x0000000003fLL);
883 if (qp == 0 && rN == 2 && imm == 0 && rM == 12 && fp_reg == 0)
885 /* mov r2, r12 - beginning of leaf routine */
888 last_prologue_pc = next_pc;
892 /* If we don't recognize a regular function or leaf routine, we are
898 last_prologue_pc = lim_pc;
902 /* Loop, looking for prologue instructions, keeping track of
903 where preserved registers were spilled. */
906 next_pc = fetch_instruction (pc, &it, &instr);
910 if ((it == B && ((instr & 0x1e1f800003f) != 0x04000000000))
911 || ((instr & 0x3fLL) != 0LL))
913 /* Exit loop upon hitting a non-nop branch instruction
914 or a predicated instruction. */
919 else if (it == I && ((instr & 0x1eff8000000LL) == 0x00188000000LL))
922 int b2 = (int) ((instr & 0x0000000e000LL) >> 13);
923 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
924 int qp = (int) (instr & 0x0000000003f);
926 if (qp == 0 && b2 == 0 && rN >= 32 && ret_reg == 0)
929 last_prologue_pc = next_pc;
932 else if ((it == I || it == M)
933 && ((instr & 0x1ee00000000LL) == 0x10800000000LL))
935 /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */
936 int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13)
937 | ((instr & 0x001f8000000LL) >> 20)
938 | ((instr & 0x000000fe000LL) >> 13));
939 int rM = (int) ((instr & 0x00007f00000LL) >> 20);
940 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
941 int qp = (int) (instr & 0x0000000003fLL);
943 if (qp == 0 && rN >= 32 && imm == 0 && rM == 12 && fp_reg == 0)
947 last_prologue_pc = next_pc;
949 else if (qp == 0 && rN == 12 && rM == 12)
951 /* adds r12, -mem_stack_frame_size, r12 */
952 mem_stack_frame_size -= imm;
953 last_prologue_pc = next_pc;
955 else if (qp == 0 && rN == 2
956 && ((rM == fp_reg && fp_reg != 0) || rM == 12))
958 /* adds r2, spilloffset, rFramePointer
960 adds r2, spilloffset, r12
962 Get ready for stf.spill or st8.spill instructions.
963 The address to start spilling at is loaded into r2.
964 FIXME: Why r2? That's what gcc currently uses; it
965 could well be different for other compilers. */
967 /* Hmm... whether or not this will work will depend on
968 where the pc is. If it's still early in the prologue
969 this'll be wrong. FIXME */
970 spill_addr = (frame ? get_frame_base (frame) : 0)
971 + (rM == 12 ? 0 : mem_stack_frame_size)
974 last_prologue_pc = next_pc;
976 else if (qp == 0 && rM >= 32 && rM < 40 && !instores[rM] &&
977 rN < 256 && imm == 0)
979 /* mov rN, rM where rM is an input register */
980 reg_contents[rN] = rM;
981 last_prologue_pc = next_pc;
983 else if (frameless && qp == 0 && rN == fp_reg && imm == 0 &&
987 last_prologue_pc = next_pc;
992 && ( ((instr & 0x1efc0000000LL) == 0x0eec0000000LL)
993 || ((instr & 0x1ffc8000000LL) == 0x0cec0000000LL) ))
995 /* stf.spill [rN] = fM, imm9
997 stf.spill [rN] = fM */
999 int imm = imm9(instr);
1000 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1001 int fM = (int) ((instr & 0x000000fe000LL) >> 13);
1002 int qp = (int) (instr & 0x0000000003fLL);
1003 if (qp == 0 && rN == spill_reg && spill_addr != 0
1004 && ((2 <= fM && fM <= 5) || (16 <= fM && fM <= 31)))
1007 get_frame_saved_regs (frame)[IA64_FR0_REGNUM + fM] = spill_addr;
1009 if ((instr & 0x1efc0000000) == 0x0eec0000000)
1012 spill_addr = 0; /* last one; must be done */
1013 last_prologue_pc = next_pc;
1016 else if ((it == M && ((instr & 0x1eff8000000LL) == 0x02110000000LL))
1017 || (it == I && ((instr & 0x1eff8000000LL) == 0x00050000000LL)) )
1023 int arM = (int) ((instr & 0x00007f00000LL) >> 20);
1024 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1025 int qp = (int) (instr & 0x0000000003fLL);
1026 if (qp == 0 && isScratch (rN) && arM == 36 /* ar.unat */)
1028 /* We have something like "mov.m r3 = ar.unat". Remember the
1029 r3 (or whatever) and watch for a store of this register... */
1031 last_prologue_pc = next_pc;
1034 else if (it == I && ((instr & 0x1eff8000000LL) == 0x00198000000LL))
1037 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1038 int qp = (int) (instr & 0x0000000003fLL);
1039 if (qp == 0 && isScratch (rN))
1042 last_prologue_pc = next_pc;
1046 && ( ((instr & 0x1ffc8000000LL) == 0x08cc0000000LL)
1047 || ((instr & 0x1efc0000000LL) == 0x0acc0000000LL)))
1051 st8 [rN] = rM, imm9 */
1052 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1053 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1054 int qp = (int) (instr & 0x0000000003fLL);
1055 int indirect = rM < 256 ? reg_contents[rM] : 0;
1056 if (qp == 0 && rN == spill_reg && spill_addr != 0
1057 && (rM == unat_save_reg || rM == pr_save_reg))
1059 /* We've found a spill of either the UNAT register or the PR
1060 register. (Well, not exactly; what we've actually found is
1061 a spill of the register that UNAT or PR was moved to).
1062 Record that fact and move on... */
1063 if (rM == unat_save_reg)
1065 /* Track UNAT register */
1067 get_frame_saved_regs (frame)[IA64_UNAT_REGNUM] = spill_addr;
1072 /* Track PR register */
1074 get_frame_saved_regs (frame)[IA64_PR_REGNUM] = spill_addr;
1077 if ((instr & 0x1efc0000000LL) == 0x0acc0000000LL)
1078 /* st8 [rN] = rM, imm9 */
1079 spill_addr += imm9(instr);
1081 spill_addr = 0; /* must be done spilling */
1082 last_prologue_pc = next_pc;
1084 else if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32])
1086 /* Allow up to one store of each input register. */
1087 instores[rM-32] = 1;
1088 last_prologue_pc = next_pc;
1090 else if (qp == 0 && 32 <= indirect && indirect < 40 &&
1091 !instores[indirect-32])
1093 /* Allow an indirect store of an input register. */
1094 instores[indirect-32] = 1;
1095 last_prologue_pc = next_pc;
1098 else if (it == M && ((instr & 0x1ff08000000LL) == 0x08c00000000LL))
1105 Note that the st8 case is handled in the clause above.
1107 Advance over stores of input registers. One store per input
1108 register is permitted. */
1109 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1110 int qp = (int) (instr & 0x0000000003fLL);
1111 int indirect = rM < 256 ? reg_contents[rM] : 0;
1112 if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32])
1114 instores[rM-32] = 1;
1115 last_prologue_pc = next_pc;
1117 else if (qp == 0 && 32 <= indirect && indirect < 40 &&
1118 !instores[indirect-32])
1120 /* Allow an indirect store of an input register. */
1121 instores[indirect-32] = 1;
1122 last_prologue_pc = next_pc;
1125 else if (it == M && ((instr & 0x1ff88000000LL) == 0x0cc80000000LL))
1132 Advance over stores of floating point input registers. Again
1133 one store per register is permitted */
1134 int fM = (int) ((instr & 0x000000fe000LL) >> 13);
1135 int qp = (int) (instr & 0x0000000003fLL);
1136 if (qp == 0 && 8 <= fM && fM < 16 && !infpstores[fM - 8])
1138 infpstores[fM-8] = 1;
1139 last_prologue_pc = next_pc;
1143 && ( ((instr & 0x1ffc8000000LL) == 0x08ec0000000LL)
1144 || ((instr & 0x1efc0000000LL) == 0x0aec0000000LL)))
1146 /* st8.spill [rN] = rM
1148 st8.spill [rN] = rM, imm9 */
1149 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1150 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1151 int qp = (int) (instr & 0x0000000003fLL);
1152 if (qp == 0 && rN == spill_reg && 4 <= rM && rM <= 7)
1154 /* We've found a spill of one of the preserved general purpose
1155 regs. Record the spill address and advance the spill
1156 register if appropriate. */
1158 get_frame_saved_regs (frame)[IA64_GR0_REGNUM + rM] = spill_addr;
1159 if ((instr & 0x1efc0000000LL) == 0x0aec0000000LL)
1160 /* st8.spill [rN] = rM, imm9 */
1161 spill_addr += imm9(instr);
1163 spill_addr = 0; /* Done spilling */
1164 last_prologue_pc = next_pc;
1176 /* Extract the size of the rotating portion of the stack
1177 frame and the register rename base from the current
1179 sor = ((get_frame_extra_info (frame)->cfm >> 14) & 0xf) * 8;
1180 rrb_gr = (get_frame_extra_info (frame)->cfm >> 18) & 0x7f;
1182 for (i = 0, addr = get_frame_extra_info (frame)->bsp;
1183 i < get_frame_extra_info (frame)->sof;
1186 if (IS_NaT_COLLECTION_ADDR (addr))
1191 get_frame_saved_regs (frame)[IA64_GR32_REGNUM + ((i + (sor - rrb_gr)) % sor)]
1194 get_frame_saved_regs (frame)[IA64_GR32_REGNUM + i] = addr;
1196 if (i+32 == cfm_reg)
1197 get_frame_saved_regs (frame)[IA64_CFM_REGNUM] = addr;
1198 if (i+32 == ret_reg)
1199 get_frame_saved_regs (frame)[IA64_VRAP_REGNUM] = addr;
1201 get_frame_saved_regs (frame)[IA64_VFP_REGNUM] = addr;
1205 if (frame && get_frame_extra_info (frame))
1207 get_frame_extra_info (frame)->after_prologue = last_prologue_pc;
1208 get_frame_extra_info (frame)->mem_stack_frame_size = mem_stack_frame_size;
1209 get_frame_extra_info (frame)->fp_reg = fp_reg;
1212 /* Try and trust the lim_pc value whenever possible. */
1213 if (trust_limit && lim_pc >= last_prologue_pc)
1216 return last_prologue_pc;
1220 ia64_skip_prologue (CORE_ADDR pc)
1222 return examine_prologue (pc, pc+1024, 0);
1226 ia64_frame_init_saved_regs (struct frame_info *frame)
1228 if (get_frame_saved_regs (frame))
1231 if ((get_frame_type (frame) == SIGTRAMP_FRAME) && SIGCONTEXT_REGISTER_ADDRESS)
1235 frame_saved_regs_zalloc (frame);
1237 get_frame_saved_regs (frame)[IA64_VRAP_REGNUM] =
1238 SIGCONTEXT_REGISTER_ADDRESS (get_frame_base (frame), IA64_IP_REGNUM);
1239 get_frame_saved_regs (frame)[IA64_CFM_REGNUM] =
1240 SIGCONTEXT_REGISTER_ADDRESS (get_frame_base (frame), IA64_CFM_REGNUM);
1241 get_frame_saved_regs (frame)[IA64_PSR_REGNUM] =
1242 SIGCONTEXT_REGISTER_ADDRESS (get_frame_base (frame), IA64_PSR_REGNUM);
1244 get_frame_saved_regs (frame)[IA64_BSP_REGNUM] =
1245 SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_BSP_REGNUM);
1247 get_frame_saved_regs (frame)[IA64_RNAT_REGNUM] =
1248 SIGCONTEXT_REGISTER_ADDRESS (get_frame_base (frame), IA64_RNAT_REGNUM);
1249 get_frame_saved_regs (frame)[IA64_CCV_REGNUM] =
1250 SIGCONTEXT_REGISTER_ADDRESS (get_frame_base (frame), IA64_CCV_REGNUM);
1251 get_frame_saved_regs (frame)[IA64_UNAT_REGNUM] =
1252 SIGCONTEXT_REGISTER_ADDRESS (get_frame_base (frame), IA64_UNAT_REGNUM);
1253 get_frame_saved_regs (frame)[IA64_FPSR_REGNUM] =
1254 SIGCONTEXT_REGISTER_ADDRESS (get_frame_base (frame), IA64_FPSR_REGNUM);
1255 get_frame_saved_regs (frame)[IA64_PFS_REGNUM] =
1256 SIGCONTEXT_REGISTER_ADDRESS (get_frame_base (frame), IA64_PFS_REGNUM);
1257 get_frame_saved_regs (frame)[IA64_LC_REGNUM] =
1258 SIGCONTEXT_REGISTER_ADDRESS (get_frame_base (frame), IA64_LC_REGNUM);
1259 for (regno = IA64_GR1_REGNUM; regno <= IA64_GR31_REGNUM; regno++)
1260 if (regno != sp_regnum)
1261 get_frame_saved_regs (frame)[regno] =
1262 SIGCONTEXT_REGISTER_ADDRESS (get_frame_base (frame), regno);
1263 for (regno = IA64_BR0_REGNUM; regno <= IA64_BR7_REGNUM; regno++)
1264 get_frame_saved_regs (frame)[regno] =
1265 SIGCONTEXT_REGISTER_ADDRESS (get_frame_base (frame), regno);
1266 for (regno = IA64_FR2_REGNUM; regno <= IA64_BR7_REGNUM; regno++)
1267 get_frame_saved_regs (frame)[regno] =
1268 SIGCONTEXT_REGISTER_ADDRESS (get_frame_base (frame), regno);
1272 CORE_ADDR func_start;
1274 func_start = get_frame_func (frame);
1275 examine_prologue (func_start, get_frame_pc (frame), frame);
1280 ia64_get_saved_register (char *raw_buffer,
1283 struct frame_info *frame,
1285 enum lval_type *lval)
1289 if (!target_has_registers)
1290 error ("No registers.");
1292 if (optimized != NULL)
1301 is_dummy_frame = DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (frame),
1302 get_frame_base (frame),
1303 get_frame_base (frame));
1305 if (regnum == SP_REGNUM && get_next_frame (frame))
1307 /* Handle SP values for all frames but the topmost. */
1308 store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum),
1309 get_frame_base (frame));
1311 else if (regnum == IA64_BSP_REGNUM)
1313 store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum),
1314 get_frame_extra_info (frame)->bsp);
1316 else if (regnum == IA64_VFP_REGNUM)
1318 /* If the function in question uses an automatic register (r32-r127)
1319 for the frame pointer, it'll be found by ia64_find_saved_register()
1320 above. If the function lacks one of these frame pointers, we can
1321 still provide a value since we know the size of the frame */
1322 CORE_ADDR vfp = (get_frame_base (frame)
1323 + get_frame_extra_info (frame)->mem_stack_frame_size);
1324 store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (IA64_VFP_REGNUM), vfp);
1326 else if (IA64_PR0_REGNUM <= regnum && regnum <= IA64_PR63_REGNUM)
1328 char pr_raw_buffer[MAX_REGISTER_SIZE];
1330 enum lval_type pr_lval;
1333 ia64_get_saved_register (pr_raw_buffer, &pr_optim, &pr_addr,
1334 frame, IA64_PR_REGNUM, &pr_lval);
1335 if (IA64_PR16_REGNUM <= regnum && regnum <= IA64_PR63_REGNUM)
1337 /* Fetch predicate register rename base from current frame
1338 marker for this frame. */
1339 int rrb_pr = (get_frame_extra_info (frame)->cfm >> 32) & 0x3f;
1341 /* Adjust the register number to account for register rotation. */
1342 regnum = IA64_PR16_REGNUM
1343 + ((regnum - IA64_PR16_REGNUM) + rrb_pr) % 48;
1345 prN_val = extract_bit_field ((unsigned char *) pr_raw_buffer,
1346 regnum - IA64_PR0_REGNUM, 1);
1347 store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum), prN_val);
1349 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
1351 char unat_raw_buffer[MAX_REGISTER_SIZE];
1353 enum lval_type unat_lval;
1354 CORE_ADDR unat_addr;
1356 ia64_get_saved_register (unat_raw_buffer, &unat_optim, &unat_addr,
1357 frame, IA64_UNAT_REGNUM, &unat_lval);
1358 unatN_val = extract_bit_field ((unsigned char *) unat_raw_buffer,
1359 regnum - IA64_NAT0_REGNUM, 1);
1360 store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum),
1363 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
1366 /* Find address of general register corresponding to nat bit we're
1368 CORE_ADDR gr_addr = 0;
1370 if (!is_dummy_frame)
1372 DEPRECATED_FRAME_INIT_SAVED_REGS (frame);
1373 gr_addr = get_frame_saved_regs (frame)[ regnum - IA64_NAT0_REGNUM
1378 /* Compute address of nat collection bits */
1379 CORE_ADDR nat_addr = gr_addr | 0x1f8;
1380 CORE_ADDR bsp = read_register (IA64_BSP_REGNUM);
1381 CORE_ADDR nat_collection;
1383 /* If our nat collection address is bigger than bsp, we have to get
1384 the nat collection from rnat. Otherwise, we fetch the nat
1385 collection from the computed address. */
1386 if (nat_addr >= bsp)
1387 nat_collection = read_register (IA64_RNAT_REGNUM);
1389 nat_collection = read_memory_integer (nat_addr, 8);
1390 nat_bit = (gr_addr >> 3) & 0x3f;
1391 natval = (nat_collection >> nat_bit) & 1;
1393 store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum), natval);
1395 else if (regnum == IA64_IP_REGNUM)
1398 if (get_next_frame (frame))
1400 /* FIXME: Set *addrp, *lval when possible. */
1401 pc = ia64_frame_saved_pc (get_next_frame (frame));
1407 store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (IA64_IP_REGNUM), pc);
1409 else if (IA64_GR32_REGNUM <= regnum && regnum <= IA64_GR127_REGNUM)
1412 if (!is_dummy_frame)
1414 DEPRECATED_FRAME_INIT_SAVED_REGS (frame);
1415 addr = get_frame_saved_regs (frame)[regnum];
1421 *lval = lval_memory;
1424 read_memory (addr, raw_buffer, REGISTER_RAW_SIZE (regnum));
1428 /* r32 - r127 must be fetchable via memory. If they aren't,
1429 then the register is unavailable */
1430 memset (raw_buffer, 0, REGISTER_RAW_SIZE (regnum));
1435 if (IA64_FR32_REGNUM <= regnum && regnum <= IA64_FR127_REGNUM)
1437 /* Fetch floating point register rename base from current
1438 frame marker for this frame. */
1439 int rrb_fr = (get_frame_extra_info (frame)->cfm >> 25) & 0x7f;
1441 /* Adjust the floating point register number to account for
1442 register rotation. */
1443 regnum = IA64_FR32_REGNUM
1444 + ((regnum - IA64_FR32_REGNUM) + rrb_fr) % 96;
1447 deprecated_generic_get_saved_register (raw_buffer, optimized, addrp,
1448 frame, regnum, lval);
1452 /* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of
1453 EXTRACT_RETURN_VALUE? GCC_P is true if compiled with gcc
1454 and TYPE is the type (which is known to be struct, union or array). */
1456 ia64_use_struct_convention (int gcc_p, struct type *type)
1458 struct type *float_elt_type;
1460 /* HFAs are structures (or arrays) consisting entirely of floating
1461 point values of the same length. Up to 8 of these are returned
1462 in registers. Don't use the struct convention when this is the
1464 float_elt_type = is_float_or_hfa_type (type);
1465 if (float_elt_type != NULL
1466 && TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type) <= 8)
1469 /* Other structs of length 32 or less are returned in r8-r11.
1470 Don't use the struct convention for those either. */
1471 return TYPE_LENGTH (type) > 32;
1475 ia64_extract_return_value (struct type *type, char *regbuf, char *valbuf)
1477 struct type *float_elt_type;
1479 float_elt_type = is_float_or_hfa_type (type);
1480 if (float_elt_type != NULL)
1483 int regnum = IA64_FR8_REGNUM;
1484 int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type);
1488 ia64_register_convert_to_virtual (regnum, float_elt_type,
1489 ®buf[REGISTER_BYTE (regnum)], valbuf + offset);
1490 offset += TYPE_LENGTH (float_elt_type);
1495 memcpy (valbuf, ®buf[REGISTER_BYTE (IA64_GR8_REGNUM)],
1496 TYPE_LENGTH (type));
1499 /* FIXME: Turn this into a stack of some sort. Unfortunately, something
1500 like this is necessary though since the IA-64 calling conventions specify
1501 that r8 is not preserved. */
1502 static CORE_ADDR struct_return_address;
1505 ia64_extract_struct_value_address (char *regbuf)
1507 /* FIXME: See above. */
1508 return struct_return_address;
1512 ia64_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
1514 /* FIXME: See above. */
1515 /* Note that most of the work was done in ia64_push_arguments() */
1516 struct_return_address = addr;
1520 ia64_frameless_function_invocation (struct frame_info *frame)
1522 DEPRECATED_FRAME_INIT_SAVED_REGS (frame);
1523 return (get_frame_extra_info (frame)->mem_stack_frame_size == 0);
1527 ia64_saved_pc_after_call (struct frame_info *frame)
1529 return read_register (IA64_BR0_REGNUM);
1533 ia64_frame_args_address (struct frame_info *frame)
1535 /* frame->frame points at the SP for this frame; But we want the start
1536 of the frame, not the end. Calling frame chain will get his for us. */
1537 return ia64_frame_chain (frame);
1541 ia64_frame_locals_address (struct frame_info *frame)
1543 /* frame->frame points at the SP for this frame; But we want the start
1544 of the frame, not the end. Calling frame chain will get his for us. */
1545 return ia64_frame_chain (frame);
1549 ia64_init_extra_frame_info (int fromleaf, struct frame_info *frame)
1552 int next_frame_is_call_dummy = ((get_next_frame (frame) != NULL)
1553 && DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (get_next_frame (frame)),
1554 get_frame_base (get_next_frame (frame)),
1555 get_frame_base (get_next_frame (frame))));
1557 frame_extra_info_zalloc (frame, sizeof (struct frame_extra_info));
1559 if (get_next_frame (frame) == 0)
1561 bsp = read_register (IA64_BSP_REGNUM);
1562 cfm = read_register (IA64_CFM_REGNUM);
1565 else if ((get_frame_type (get_next_frame (frame)) == SIGTRAMP_FRAME))
1567 bsp = read_sigcontext_register (get_next_frame (frame), IA64_BSP_REGNUM);
1568 cfm = read_sigcontext_register (get_next_frame (frame), IA64_CFM_REGNUM);
1570 else if (next_frame_is_call_dummy)
1572 bsp = deprecated_read_register_dummy (get_frame_pc (get_next_frame (frame)),
1573 get_frame_base (get_next_frame (frame)),
1575 cfm = deprecated_read_register_dummy (get_frame_pc (get_next_frame (frame)),
1576 get_frame_base (get_next_frame (frame)),
1581 struct frame_info *frn = get_next_frame (frame);
1583 DEPRECATED_FRAME_INIT_SAVED_REGS (frn);
1585 if (get_frame_saved_regs (frn)[IA64_CFM_REGNUM] != 0)
1586 cfm = read_memory_integer (get_frame_saved_regs (frn)[IA64_CFM_REGNUM], 8);
1587 else if (get_next_frame (frn) && (get_frame_type (get_next_frame (frn)) == SIGTRAMP_FRAME))
1588 cfm = read_sigcontext_register (get_next_frame (frn), IA64_PFS_REGNUM);
1589 else if (get_next_frame (frn)
1590 && DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (get_next_frame (frn)),
1591 get_frame_base (get_next_frame (frn)),
1592 get_frame_base (get_next_frame (frn))))
1593 cfm = deprecated_read_register_dummy (get_frame_pc (get_next_frame (frn)),
1594 get_frame_base (get_next_frame (frn)),
1597 cfm = read_register (IA64_PFS_REGNUM);
1599 bsp = get_frame_extra_info (frn)->bsp;
1601 get_frame_extra_info (frame)->cfm = cfm;
1602 get_frame_extra_info (frame)->sof = cfm & 0x7f;
1603 get_frame_extra_info (frame)->sol = (cfm >> 7) & 0x7f;
1604 if (get_next_frame (frame) == 0
1605 || (get_frame_type (get_next_frame (frame)) == SIGTRAMP_FRAME)
1606 || next_frame_is_call_dummy)
1607 get_frame_extra_info (frame)->bsp =
1608 rse_address_add (bsp, -get_frame_extra_info (frame)->sof);
1610 get_frame_extra_info (frame)->bsp =
1611 rse_address_add (bsp, -get_frame_extra_info (frame)->sol);
1613 get_frame_extra_info (frame)->after_prologue = 0;
1614 get_frame_extra_info (frame)->mem_stack_frame_size = -1; /* Not yet determined */
1615 get_frame_extra_info (frame)->fp_reg = 0;
1619 is_float_or_hfa_type_recurse (struct type *t, struct type **etp)
1621 switch (TYPE_CODE (t))
1625 return TYPE_LENGTH (*etp) == TYPE_LENGTH (t);
1632 case TYPE_CODE_ARRAY:
1634 is_float_or_hfa_type_recurse (check_typedef (TYPE_TARGET_TYPE (t)),
1637 case TYPE_CODE_STRUCT:
1641 for (i = 0; i < TYPE_NFIELDS (t); i++)
1642 if (!is_float_or_hfa_type_recurse
1643 (check_typedef (TYPE_FIELD_TYPE (t, i)), etp))
1654 /* Determine if the given type is one of the floating point types or
1655 and HFA (which is a struct, array, or combination thereof whose
1656 bottom-most elements are all of the same floating point type.) */
1658 static struct type *
1659 is_float_or_hfa_type (struct type *t)
1661 struct type *et = 0;
1663 return is_float_or_hfa_type_recurse (t, &et) ? et : 0;
1667 /* Return 1 if the alignment of T is such that the next even slot
1668 should be used. Return 0, if the next available slot should
1669 be used. (See section 8.5.1 of the IA-64 Software Conventions
1670 and Runtime manual.) */
1673 slot_alignment_is_next_even (struct type *t)
1675 switch (TYPE_CODE (t))
1679 if (TYPE_LENGTH (t) > 8)
1683 case TYPE_CODE_ARRAY:
1685 slot_alignment_is_next_even (check_typedef (TYPE_TARGET_TYPE (t)));
1686 case TYPE_CODE_STRUCT:
1690 for (i = 0; i < TYPE_NFIELDS (t); i++)
1691 if (slot_alignment_is_next_even
1692 (check_typedef (TYPE_FIELD_TYPE (t, i))))
1701 /* Attempt to find (and return) the global pointer for the given
1704 This is a rather nasty bit of code searchs for the .dynamic section
1705 in the objfile corresponding to the pc of the function we're trying
1706 to call. Once it finds the addresses at which the .dynamic section
1707 lives in the child process, it scans the Elf64_Dyn entries for a
1708 DT_PLTGOT tag. If it finds one of these, the corresponding
1709 d_un.d_ptr value is the global pointer. */
1712 generic_elf_find_global_pointer (CORE_ADDR faddr)
1714 struct obj_section *faddr_sect;
1716 faddr_sect = find_pc_section (faddr);
1717 if (faddr_sect != NULL)
1719 struct obj_section *osect;
1721 ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
1723 if (strcmp (osect->the_bfd_section->name, ".dynamic") == 0)
1727 if (osect < faddr_sect->objfile->sections_end)
1732 while (addr < osect->endaddr)
1738 status = target_read_memory (addr, buf, sizeof (buf));
1741 tag = extract_signed_integer (buf, sizeof (buf));
1743 if (tag == DT_PLTGOT)
1745 CORE_ADDR global_pointer;
1747 status = target_read_memory (addr + 8, buf, sizeof (buf));
1750 global_pointer = extract_unsigned_integer (buf, sizeof (buf));
1753 return global_pointer;
1766 /* Given a function's address, attempt to find (and return) the
1767 corresponding (canonical) function descriptor. Return 0 if
1770 find_extant_func_descr (CORE_ADDR faddr)
1772 struct obj_section *faddr_sect;
1774 /* Return early if faddr is already a function descriptor */
1775 faddr_sect = find_pc_section (faddr);
1776 if (faddr_sect && strcmp (faddr_sect->the_bfd_section->name, ".opd") == 0)
1779 if (faddr_sect != NULL)
1781 struct obj_section *osect;
1782 ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
1784 if (strcmp (osect->the_bfd_section->name, ".opd") == 0)
1788 if (osect < faddr_sect->objfile->sections_end)
1793 while (addr < osect->endaddr)
1799 status = target_read_memory (addr, buf, sizeof (buf));
1802 faddr2 = extract_signed_integer (buf, sizeof (buf));
1804 if (faddr == faddr2)
1814 /* Attempt to find a function descriptor corresponding to the
1815 given address. If none is found, construct one on the
1816 stack using the address at fdaptr */
1819 find_func_descr (CORE_ADDR faddr, CORE_ADDR *fdaptr)
1823 fdesc = find_extant_func_descr (faddr);
1827 CORE_ADDR global_pointer;
1833 global_pointer = FIND_GLOBAL_POINTER (faddr);
1835 if (global_pointer == 0)
1836 global_pointer = read_register (IA64_GR1_REGNUM);
1838 store_unsigned_integer (buf, 8, faddr);
1839 store_unsigned_integer (buf + 8, 8, global_pointer);
1841 write_memory (fdesc, buf, 16);
1848 ia64_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
1849 int struct_return, CORE_ADDR struct_addr)
1855 int nslots, rseslots, memslots, slotnum, nfuncargs;
1857 CORE_ADDR bsp, cfm, pfs, new_bsp, funcdescaddr;
1861 /* Count the number of slots needed for the arguments */
1862 for (argno = 0; argno < nargs; argno++)
1865 type = check_typedef (VALUE_TYPE (arg));
1866 len = TYPE_LENGTH (type);
1868 if ((nslots & 1) && slot_alignment_is_next_even (type))
1871 if (TYPE_CODE (type) == TYPE_CODE_FUNC)
1874 nslots += (len + 7) / 8;
1877 /* Divvy up the slots between the RSE and the memory stack */
1878 rseslots = (nslots > 8) ? 8 : nslots;
1879 memslots = nslots - rseslots;
1881 /* Allocate a new RSE frame */
1882 cfm = read_register (IA64_CFM_REGNUM);
1884 bsp = read_register (IA64_BSP_REGNUM);
1885 bsp = rse_address_add (bsp, cfm & 0x7f);
1886 new_bsp = rse_address_add (bsp, rseslots);
1887 write_register (IA64_BSP_REGNUM, new_bsp);
1889 pfs = read_register (IA64_PFS_REGNUM);
1890 pfs &= 0xc000000000000000LL;
1891 pfs |= (cfm & 0xffffffffffffLL);
1892 write_register (IA64_PFS_REGNUM, pfs);
1894 cfm &= 0xc000000000000000LL;
1896 write_register (IA64_CFM_REGNUM, cfm);
1898 /* We will attempt to find function descriptors in the .opd segment,
1899 but if we can't we'll construct them ourselves. That being the
1900 case, we'll need to reserve space on the stack for them. */
1901 funcdescaddr = sp - nfuncargs * 16;
1902 funcdescaddr &= ~0xfLL;
1904 /* Adjust the stack pointer to it's new value. The calling conventions
1905 require us to have 16 bytes of scratch, plus whatever space is
1906 necessary for the memory slots and our function descriptors */
1907 sp = sp - 16 - (memslots + nfuncargs) * 8;
1908 sp &= ~0xfLL; /* Maintain 16 byte alignment */
1910 /* Place the arguments where they belong. The arguments will be
1911 either placed in the RSE backing store or on the memory stack.
1912 In addition, floating point arguments or HFAs are placed in
1913 floating point registers. */
1915 floatreg = IA64_FR8_REGNUM;
1916 for (argno = 0; argno < nargs; argno++)
1918 struct type *float_elt_type;
1921 type = check_typedef (VALUE_TYPE (arg));
1922 len = TYPE_LENGTH (type);
1924 /* Special handling for function parameters */
1926 && TYPE_CODE (type) == TYPE_CODE_PTR
1927 && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC)
1931 store_unsigned_integer (val_buf, 8,
1932 find_func_descr (extract_unsigned_integer (VALUE_CONTENTS (arg), 8),
1934 if (slotnum < rseslots)
1935 write_memory (rse_address_add (bsp, slotnum), val_buf, 8);
1937 write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8);
1944 /* Skip odd slot if necessary... */
1945 if ((slotnum & 1) && slot_alignment_is_next_even (type))
1953 memset (val_buf, 0, 8);
1954 memcpy (val_buf, VALUE_CONTENTS (arg) + argoffset, (len > 8) ? 8 : len);
1956 if (slotnum < rseslots)
1957 write_memory (rse_address_add (bsp, slotnum), val_buf, 8);
1959 write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8);
1966 /* Handle floating point types (including HFAs) */
1967 float_elt_type = is_float_or_hfa_type (type);
1968 if (float_elt_type != NULL)
1971 len = TYPE_LENGTH (type);
1972 while (len > 0 && floatreg < IA64_FR16_REGNUM)
1974 ia64_register_convert_to_raw (
1977 VALUE_CONTENTS (arg) + argoffset,
1978 &deprecated_registers[REGISTER_BYTE (floatreg)]);
1980 argoffset += TYPE_LENGTH (float_elt_type);
1981 len -= TYPE_LENGTH (float_elt_type);
1986 /* Store the struct return value in r8 if necessary. */
1989 store_unsigned_integer (&deprecated_registers[REGISTER_BYTE (IA64_GR8_REGNUM)],
1990 REGISTER_RAW_SIZE (IA64_GR8_REGNUM),
1994 /* Sync gdb's idea of what the registers are with the target. */
1995 target_store_registers (-1);
1997 /* FIXME: This doesn't belong here! Instead, SAVE_DUMMY_FRAME_TOS needs
1998 to be defined to call generic_save_dummy_frame_tos(). But at the
1999 time of this writing, SAVE_DUMMY_FRAME_TOS wasn't gdbarch'd, so
2000 I chose to put this call here instead of using the old mechanisms.
2001 Once SAVE_DUMMY_FRAME_TOS is gdbarch'd, all we need to do is add the
2004 set_gdbarch_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos);
2006 to ia64_gdbarch_init() and remove the line below. */
2007 generic_save_dummy_frame_tos (sp);
2013 ia64_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
2015 CORE_ADDR global_pointer = FIND_GLOBAL_POINTER (pc);
2017 if (global_pointer != 0)
2018 write_register (IA64_GR1_REGNUM, global_pointer);
2020 write_register (IA64_BR0_REGNUM, CALL_DUMMY_ADDRESS ());
2025 ia64_store_return_value (struct type *type, char *valbuf)
2027 if (TYPE_CODE (type) == TYPE_CODE_FLT)
2029 ia64_register_convert_to_raw (type, IA64_FR8_REGNUM, valbuf,
2030 &deprecated_registers[REGISTER_BYTE (IA64_FR8_REGNUM)]);
2031 target_store_registers (IA64_FR8_REGNUM);
2034 deprecated_write_register_bytes (REGISTER_BYTE (IA64_GR8_REGNUM),
2035 valbuf, TYPE_LENGTH (type));
2039 ia64_pop_frame (void)
2041 generic_pop_current_frame (ia64_pop_frame_regular);
2045 ia64_pop_frame_regular (struct frame_info *frame)
2048 CORE_ADDR bsp, cfm, pfs;
2050 DEPRECATED_FRAME_INIT_SAVED_REGS (frame);
2052 for (regno = 0; regno < ia64_num_regs; regno++)
2054 if (get_frame_saved_regs (frame)[regno]
2055 && (!(IA64_GR32_REGNUM <= regno && regno <= IA64_GR127_REGNUM))
2056 && regno != pc_regnum
2057 && regno != sp_regnum
2058 && regno != IA64_PFS_REGNUM
2059 && regno != IA64_CFM_REGNUM
2060 && regno != IA64_BSP_REGNUM
2061 && regno != IA64_BSPSTORE_REGNUM)
2063 write_register (regno,
2064 read_memory_integer (get_frame_saved_regs (frame)[regno],
2065 REGISTER_RAW_SIZE (regno)));
2069 write_register (sp_regnum, DEPRECATED_FRAME_CHAIN (frame));
2070 write_pc (DEPRECATED_FRAME_SAVED_PC (frame));
2072 cfm = read_register (IA64_CFM_REGNUM);
2074 if (get_frame_saved_regs (frame)[IA64_PFS_REGNUM])
2076 pfs = read_memory_integer (get_frame_saved_regs (frame)[IA64_PFS_REGNUM],
2077 REGISTER_RAW_SIZE (IA64_PFS_REGNUM));
2080 pfs = read_register (IA64_PFS_REGNUM);
2082 /* Compute the new bsp by *adding* the difference between the
2083 size of the frame and the size of the locals (both wrt the
2084 frame that we're going back to). This seems kind of strange,
2085 especially since it seems like we ought to be subtracting the
2086 size of the locals... and we should; but the Linux kernel
2087 wants bsp to be set at the end of all used registers. It's
2088 likely that this code will need to be revised to accomodate
2089 other operating systems. */
2090 bsp = rse_address_add (get_frame_extra_info (frame)->bsp,
2091 (pfs & 0x7f) - ((pfs >> 7) & 0x7f));
2092 write_register (IA64_BSP_REGNUM, bsp);
2094 /* FIXME: What becomes of the epilog count in the PFS? */
2095 cfm = (cfm & ~0xffffffffffffLL) | (pfs & 0xffffffffffffLL);
2096 write_register (IA64_CFM_REGNUM, cfm);
2098 flush_cached_frames ();
2102 ia64_remote_translate_xfer_address (struct gdbarch *gdbarch,
2103 struct regcache *regcache,
2104 CORE_ADDR memaddr, int nr_bytes,
2105 CORE_ADDR *targ_addr, int *targ_len)
2107 *targ_addr = memaddr;
2108 *targ_len = nr_bytes;
2112 process_note_abi_tag_sections (bfd *abfd, asection *sect, void *obj)
2114 int *os_ident_ptr = obj;
2116 unsigned int sectsize;
2118 name = bfd_get_section_name (abfd, sect);
2119 sectsize = bfd_section_size (abfd, sect);
2120 if (strcmp (name, ".note.ABI-tag") == 0 && sectsize > 0)
2122 unsigned int name_length, data_length, note_type;
2123 char *note = alloca (sectsize);
2125 bfd_get_section_contents (abfd, sect, note,
2126 (file_ptr) 0, (bfd_size_type) sectsize);
2128 name_length = bfd_h_get_32 (abfd, note);
2129 data_length = bfd_h_get_32 (abfd, note + 4);
2130 note_type = bfd_h_get_32 (abfd, note + 8);
2132 if (name_length == 4 && data_length == 16 && note_type == 1
2133 && strcmp (note + 12, "GNU") == 0)
2135 int os_number = bfd_h_get_32 (abfd, note + 16);
2137 /* The case numbers are from abi-tags in glibc */
2141 *os_ident_ptr = ELFOSABI_LINUX;
2144 *os_ident_ptr = ELFOSABI_HURD;
2147 *os_ident_ptr = ELFOSABI_SOLARIS;
2150 internal_error (__FILE__, __LINE__,
2151 "process_note_abi_sections: unknown OS number %d", os_number);
2158 static struct gdbarch *
2159 ia64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
2161 struct gdbarch *gdbarch;
2162 struct gdbarch_tdep *tdep;
2165 if (info.abfd != NULL
2166 && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour)
2168 os_ident = elf_elfheader (info.abfd)->e_ident[EI_OSABI];
2170 /* If os_ident is 0, it is not necessarily the case that we're
2171 on a SYSV system. (ELFOSABI_NONE is defined to be 0.)
2172 GNU/Linux uses a note section to record OS/ABI info, but
2173 leaves e_ident[EI_OSABI] zero. So we have to check for note
2177 bfd_map_over_sections (info.abfd,
2178 process_note_abi_tag_sections,
2185 for (arches = gdbarch_list_lookup_by_info (arches, &info);
2187 arches = gdbarch_list_lookup_by_info (arches->next, &info))
2189 tdep = gdbarch_tdep (arches->gdbarch);
2190 if (tdep &&tdep->os_ident == os_ident)
2191 return arches->gdbarch;
2194 tdep = xmalloc (sizeof (struct gdbarch_tdep));
2195 gdbarch = gdbarch_alloc (&info, tdep);
2196 tdep->os_ident = os_ident;
2198 /* NOTE: cagney/2002-12-06: This can be deleted when this arch is
2199 ready to unwind the PC first (see frame.c:get_prev_frame()). */
2200 set_gdbarch_deprecated_init_frame_pc (gdbarch, init_frame_pc_default);
2202 /* Set the method of obtaining the sigcontext addresses at which
2203 registers are saved. The method of checking to see if
2204 native_find_global_pointer is nonzero to indicate that we're
2205 on AIX is kind of hokey, but I can't think of a better way
2207 if (os_ident == ELFOSABI_LINUX)
2208 tdep->sigcontext_register_address = ia64_linux_sigcontext_register_address;
2209 else if (native_find_global_pointer != 0)
2210 tdep->sigcontext_register_address = ia64_aix_sigcontext_register_address;
2212 tdep->sigcontext_register_address = 0;
2214 /* We know that GNU/Linux won't have to resort to the
2215 native_find_global_pointer hackery. But that's the only one we
2216 know about so far, so if native_find_global_pointer is set to
2217 something non-zero, then use it. Otherwise fall back to using
2218 generic_elf_find_global_pointer. This arrangement should (in
2219 theory) allow us to cross debug GNU/Linux binaries from an AIX
2221 if (os_ident == ELFOSABI_LINUX)
2222 tdep->find_global_pointer = generic_elf_find_global_pointer;
2223 else if (native_find_global_pointer != 0)
2224 tdep->find_global_pointer = native_find_global_pointer;
2226 tdep->find_global_pointer = generic_elf_find_global_pointer;
2228 set_gdbarch_short_bit (gdbarch, 16);
2229 set_gdbarch_int_bit (gdbarch, 32);
2230 set_gdbarch_long_bit (gdbarch, 64);
2231 set_gdbarch_long_long_bit (gdbarch, 64);
2232 set_gdbarch_float_bit (gdbarch, 32);
2233 set_gdbarch_double_bit (gdbarch, 64);
2234 set_gdbarch_long_double_bit (gdbarch, 64);
2235 set_gdbarch_ptr_bit (gdbarch, 64);
2237 set_gdbarch_num_regs (gdbarch, ia64_num_regs);
2238 set_gdbarch_sp_regnum (gdbarch, sp_regnum);
2239 set_gdbarch_deprecated_fp_regnum (gdbarch, fp_regnum);
2240 set_gdbarch_pc_regnum (gdbarch, pc_regnum);
2241 set_gdbarch_fp0_regnum (gdbarch, IA64_FR0_REGNUM);
2243 set_gdbarch_register_name (gdbarch, ia64_register_name);
2244 set_gdbarch_deprecated_register_size (gdbarch, 8);
2245 set_gdbarch_deprecated_register_bytes (gdbarch, ia64_num_regs * 8 + 128*8);
2246 set_gdbarch_register_byte (gdbarch, ia64_register_byte);
2247 set_gdbarch_register_raw_size (gdbarch, ia64_register_raw_size);
2248 set_gdbarch_deprecated_max_register_raw_size (gdbarch, 16);
2249 set_gdbarch_register_virtual_size (gdbarch, ia64_register_virtual_size);
2250 set_gdbarch_deprecated_max_register_virtual_size (gdbarch, 16);
2251 set_gdbarch_register_virtual_type (gdbarch, ia64_register_virtual_type);
2253 set_gdbarch_skip_prologue (gdbarch, ia64_skip_prologue);
2255 set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
2256 set_gdbarch_frameless_function_invocation (gdbarch, ia64_frameless_function_invocation);
2258 set_gdbarch_deprecated_saved_pc_after_call (gdbarch, ia64_saved_pc_after_call);
2260 set_gdbarch_deprecated_frame_chain (gdbarch, ia64_frame_chain);
2261 set_gdbarch_deprecated_frame_saved_pc (gdbarch, ia64_frame_saved_pc);
2263 set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, ia64_frame_init_saved_regs);
2264 set_gdbarch_deprecated_get_saved_register (gdbarch, ia64_get_saved_register);
2266 set_gdbarch_register_convertible (gdbarch, ia64_register_convertible);
2267 set_gdbarch_register_convert_to_virtual (gdbarch, ia64_register_convert_to_virtual);
2268 set_gdbarch_register_convert_to_raw (gdbarch, ia64_register_convert_to_raw);
2270 set_gdbarch_use_struct_convention (gdbarch, ia64_use_struct_convention);
2271 set_gdbarch_deprecated_extract_return_value (gdbarch, ia64_extract_return_value);
2273 set_gdbarch_deprecated_store_struct_return (gdbarch, ia64_store_struct_return);
2274 set_gdbarch_deprecated_store_return_value (gdbarch, ia64_store_return_value);
2275 set_gdbarch_deprecated_extract_struct_value_address (gdbarch, ia64_extract_struct_value_address);
2277 set_gdbarch_memory_insert_breakpoint (gdbarch, ia64_memory_insert_breakpoint);
2278 set_gdbarch_memory_remove_breakpoint (gdbarch, ia64_memory_remove_breakpoint);
2279 set_gdbarch_breakpoint_from_pc (gdbarch, ia64_breakpoint_from_pc);
2280 set_gdbarch_read_pc (gdbarch, ia64_read_pc);
2281 set_gdbarch_write_pc (gdbarch, ia64_write_pc);
2283 /* Settings for calling functions in the inferior. */
2284 set_gdbarch_deprecated_push_arguments (gdbarch, ia64_push_arguments);
2285 set_gdbarch_deprecated_push_return_address (gdbarch, ia64_push_return_address);
2286 set_gdbarch_deprecated_pop_frame (gdbarch, ia64_pop_frame);
2288 set_gdbarch_deprecated_call_dummy_words (gdbarch, ia64_call_dummy_words);
2289 set_gdbarch_deprecated_sizeof_call_dummy_words (gdbarch, sizeof (ia64_call_dummy_words));
2290 set_gdbarch_deprecated_init_extra_frame_info (gdbarch, ia64_init_extra_frame_info);
2291 set_gdbarch_frame_args_address (gdbarch, ia64_frame_args_address);
2292 set_gdbarch_frame_locals_address (gdbarch, ia64_frame_locals_address);
2294 /* We won't necessarily have a frame pointer and even if we do, it
2295 winds up being extraordinarly messy when attempting to find the
2296 frame chain. So for the purposes of creating frames (which is
2297 all deprecated_read_fp() is used for), simply use the stack
2298 pointer value instead. */
2299 set_gdbarch_deprecated_target_read_fp (gdbarch, generic_target_read_sp);
2301 /* Settings that should be unnecessary. */
2302 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
2304 set_gdbarch_read_sp (gdbarch, generic_target_read_sp);
2305 set_gdbarch_deprecated_dummy_write_sp (gdbarch, generic_target_write_sp);
2307 set_gdbarch_decr_pc_after_break (gdbarch, 0);
2308 set_gdbarch_function_start_offset (gdbarch, 0);
2309 set_gdbarch_frame_args_skip (gdbarch, 0);
2311 set_gdbarch_remote_translate_xfer_address (
2312 gdbarch, ia64_remote_translate_xfer_address);
2318 _initialize_ia64_tdep (void)
2320 register_gdbarch_init (bfd_arch_ia64, ia64_gdbarch_init);
2322 deprecated_tm_print_insn = print_insn_ia64;
2323 deprecated_tm_print_insn_info.bytes_per_line = SLOT_MULTIPLIER;