1 /* Target-dependent code for the IA-64 for GDB, the GNU debugger.
2 Copyright 1999, 2000, 2001
3 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"
32 #include "elf/common.h" /* for DT_PLTGOT value */
35 /* Hook for determining the global pointer when calling functions in
36 the inferior under AIX. The initialization code in ia64-aix-nat.c
37 sets this hook to the address of a function which will find the
38 global pointer for a given address.
40 The generic code which uses the dynamic section in the inferior for
41 finding the global pointer is not of much use on AIX since the
42 values obtained from the inferior have not been relocated. */
44 CORE_ADDR (*native_find_global_pointer) (CORE_ADDR) = 0;
46 /* An enumeration of the different IA-64 instruction types. */
48 typedef enum instruction_type
50 A, /* Integer ALU ; I-unit or M-unit */
51 I, /* Non-ALU integer; I-unit */
52 M, /* Memory ; M-unit */
53 F, /* Floating-point ; F-unit */
54 B, /* Branch ; B-unit */
55 L, /* Extended (L+X) ; I-unit */
56 X, /* Extended (L+X) ; I-unit */
57 undefined /* undefined or reserved */
60 /* We represent IA-64 PC addresses as the value of the instruction
61 pointer or'd with some bit combination in the low nibble which
62 represents the slot number in the bundle addressed by the
63 instruction pointer. The problem is that the Linux kernel
64 multiplies its slot numbers (for exceptions) by one while the
65 disassembler multiplies its slot numbers by 6. In addition, I've
66 heard it said that the simulator uses 1 as the multiplier.
68 I've fixed the disassembler so that the bytes_per_line field will
69 be the slot multiplier. If bytes_per_line comes in as zero, it
70 is set to six (which is how it was set up initially). -- objdump
71 displays pretty disassembly dumps with this value. For our purposes,
72 we'll set bytes_per_line to SLOT_MULTIPLIER. This is okay since we
73 never want to also display the raw bytes the way objdump does. */
75 #define SLOT_MULTIPLIER 1
77 /* Length in bytes of an instruction bundle */
81 /* FIXME: These extern declarations should go in ia64-tdep.h. */
82 extern CORE_ADDR ia64_linux_sigcontext_register_address (CORE_ADDR, int);
83 extern CORE_ADDR ia64_aix_sigcontext_register_address (CORE_ADDR, int);
85 static gdbarch_init_ftype ia64_gdbarch_init;
87 static gdbarch_register_name_ftype ia64_register_name;
88 static gdbarch_register_raw_size_ftype ia64_register_raw_size;
89 static gdbarch_register_virtual_size_ftype ia64_register_virtual_size;
90 static gdbarch_register_virtual_type_ftype ia64_register_virtual_type;
91 static gdbarch_register_byte_ftype ia64_register_byte;
92 static gdbarch_breakpoint_from_pc_ftype ia64_breakpoint_from_pc;
93 static gdbarch_frame_chain_ftype ia64_frame_chain;
94 static gdbarch_frame_saved_pc_ftype ia64_frame_saved_pc;
95 static gdbarch_skip_prologue_ftype ia64_skip_prologue;
96 static gdbarch_frame_init_saved_regs_ftype ia64_frame_init_saved_regs;
97 static gdbarch_get_saved_register_ftype ia64_get_saved_register;
98 static gdbarch_extract_return_value_ftype ia64_extract_return_value;
99 static gdbarch_extract_struct_value_address_ftype ia64_extract_struct_value_address;
100 static gdbarch_use_struct_convention_ftype ia64_use_struct_convention;
101 static gdbarch_frameless_function_invocation_ftype ia64_frameless_function_invocation;
102 static gdbarch_init_extra_frame_info_ftype ia64_init_extra_frame_info;
103 static gdbarch_store_return_value_ftype ia64_store_return_value;
104 static gdbarch_store_struct_return_ftype ia64_store_struct_return;
105 static gdbarch_push_arguments_ftype ia64_push_arguments;
106 static gdbarch_push_return_address_ftype ia64_push_return_address;
107 static gdbarch_pop_frame_ftype ia64_pop_frame;
108 static gdbarch_saved_pc_after_call_ftype ia64_saved_pc_after_call;
109 static void ia64_pop_frame_regular (struct frame_info *frame);
110 static struct type *is_float_or_hfa_type (struct type *t);
112 static int ia64_num_regs = 590;
114 static int pc_regnum = IA64_IP_REGNUM;
115 static int sp_regnum = IA64_GR12_REGNUM;
116 static int fp_regnum = IA64_VFP_REGNUM;
117 static int lr_regnum = IA64_VRAP_REGNUM;
119 static LONGEST ia64_call_dummy_words[] = {0};
121 /* Array of register names; There should be ia64_num_regs strings in
124 static char *ia64_register_names[] =
125 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
126 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
127 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
128 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
129 "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39",
130 "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47",
131 "r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55",
132 "r56", "r57", "r58", "r59", "r60", "r61", "r62", "r63",
133 "r64", "r65", "r66", "r67", "r68", "r69", "r70", "r71",
134 "r72", "r73", "r74", "r75", "r76", "r77", "r78", "r79",
135 "r80", "r81", "r82", "r83", "r84", "r85", "r86", "r87",
136 "r88", "r89", "r90", "r91", "r92", "r93", "r94", "r95",
137 "r96", "r97", "r98", "r99", "r100", "r101", "r102", "r103",
138 "r104", "r105", "r106", "r107", "r108", "r109", "r110", "r111",
139 "r112", "r113", "r114", "r115", "r116", "r117", "r118", "r119",
140 "r120", "r121", "r122", "r123", "r124", "r125", "r126", "r127",
142 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
143 "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
144 "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
145 "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
146 "f32", "f33", "f34", "f35", "f36", "f37", "f38", "f39",
147 "f40", "f41", "f42", "f43", "f44", "f45", "f46", "f47",
148 "f48", "f49", "f50", "f51", "f52", "f53", "f54", "f55",
149 "f56", "f57", "f58", "f59", "f60", "f61", "f62", "f63",
150 "f64", "f65", "f66", "f67", "f68", "f69", "f70", "f71",
151 "f72", "f73", "f74", "f75", "f76", "f77", "f78", "f79",
152 "f80", "f81", "f82", "f83", "f84", "f85", "f86", "f87",
153 "f88", "f89", "f90", "f91", "f92", "f93", "f94", "f95",
154 "f96", "f97", "f98", "f99", "f100", "f101", "f102", "f103",
155 "f104", "f105", "f106", "f107", "f108", "f109", "f110", "f111",
156 "f112", "f113", "f114", "f115", "f116", "f117", "f118", "f119",
157 "f120", "f121", "f122", "f123", "f124", "f125", "f126", "f127",
159 "p0", "p1", "p2", "p3", "p4", "p5", "p6", "p7",
160 "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15",
161 "p16", "p17", "p18", "p19", "p20", "p21", "p22", "p23",
162 "p24", "p25", "p26", "p27", "p28", "p29", "p30", "p31",
163 "p32", "p33", "p34", "p35", "p36", "p37", "p38", "p39",
164 "p40", "p41", "p42", "p43", "p44", "p45", "p46", "p47",
165 "p48", "p49", "p50", "p51", "p52", "p53", "p54", "p55",
166 "p56", "p57", "p58", "p59", "p60", "p61", "p62", "p63",
168 "b0", "b1", "b2", "b3", "b4", "b5", "b6", "b7",
172 "pr", "ip", "psr", "cfm",
174 "kr0", "kr1", "kr2", "kr3", "kr4", "kr5", "kr6", "kr7",
175 "", "", "", "", "", "", "", "",
176 "rsc", "bsp", "bspstore", "rnat",
178 "eflag", "csd", "ssd", "cflg", "fsr", "fir", "fdr", "",
179 "ccv", "", "", "", "unat", "", "", "",
180 "fpsr", "", "", "", "itc",
181 "", "", "", "", "", "", "", "", "", "",
182 "", "", "", "", "", "", "", "", "",
184 "", "", "", "", "", "", "", "", "", "",
185 "", "", "", "", "", "", "", "", "", "",
186 "", "", "", "", "", "", "", "", "", "",
187 "", "", "", "", "", "", "", "", "", "",
188 "", "", "", "", "", "", "", "", "", "",
189 "", "", "", "", "", "", "", "", "", "",
191 "nat0", "nat1", "nat2", "nat3", "nat4", "nat5", "nat6", "nat7",
192 "nat8", "nat9", "nat10", "nat11", "nat12", "nat13", "nat14", "nat15",
193 "nat16", "nat17", "nat18", "nat19", "nat20", "nat21", "nat22", "nat23",
194 "nat24", "nat25", "nat26", "nat27", "nat28", "nat29", "nat30", "nat31",
195 "nat32", "nat33", "nat34", "nat35", "nat36", "nat37", "nat38", "nat39",
196 "nat40", "nat41", "nat42", "nat43", "nat44", "nat45", "nat46", "nat47",
197 "nat48", "nat49", "nat50", "nat51", "nat52", "nat53", "nat54", "nat55",
198 "nat56", "nat57", "nat58", "nat59", "nat60", "nat61", "nat62", "nat63",
199 "nat64", "nat65", "nat66", "nat67", "nat68", "nat69", "nat70", "nat71",
200 "nat72", "nat73", "nat74", "nat75", "nat76", "nat77", "nat78", "nat79",
201 "nat80", "nat81", "nat82", "nat83", "nat84", "nat85", "nat86", "nat87",
202 "nat88", "nat89", "nat90", "nat91", "nat92", "nat93", "nat94", "nat95",
203 "nat96", "nat97", "nat98", "nat99", "nat100","nat101","nat102","nat103",
204 "nat104","nat105","nat106","nat107","nat108","nat109","nat110","nat111",
205 "nat112","nat113","nat114","nat115","nat116","nat117","nat118","nat119",
206 "nat120","nat121","nat122","nat123","nat124","nat125","nat126","nat127",
209 struct frame_extra_info
211 CORE_ADDR bsp; /* points at r32 for the current frame */
212 CORE_ADDR cfm; /* cfm value for current frame */
213 int sof; /* Size of frame (decoded from cfm value) */
214 int sol; /* Size of locals (decoded from cfm value) */
215 CORE_ADDR after_prologue;
216 /* Address of first instruction after the last
217 prologue instruction; Note that there may
218 be instructions from the function's body
219 intermingled with the prologue. */
220 int mem_stack_frame_size;
221 /* Size of the memory stack frame (may be zero),
222 or -1 if it has not been determined yet. */
223 int fp_reg; /* Register number (if any) used a frame pointer
224 for this frame. 0 if no register is being used
225 as the frame pointer. */
230 int os_ident; /* From the ELF header, one of the ELFOSABI_
231 constants: ELFOSABI_LINUX, ELFOSABI_AIX,
233 CORE_ADDR (*sigcontext_register_address) (CORE_ADDR, int);
234 /* OS specific function which, given a frame address
235 and register number, returns the offset to the
236 given register from the start of the frame. */
237 CORE_ADDR (*find_global_pointer) (CORE_ADDR);
240 #define SIGCONTEXT_REGISTER_ADDRESS \
241 (gdbarch_tdep (current_gdbarch)->sigcontext_register_address)
242 #define FIND_GLOBAL_POINTER \
243 (gdbarch_tdep (current_gdbarch)->find_global_pointer)
246 ia64_register_name (int reg)
248 return ia64_register_names[reg];
252 ia64_register_raw_size (int reg)
254 return (IA64_FR0_REGNUM <= reg && reg <= IA64_FR127_REGNUM) ? 16 : 8;
258 ia64_register_virtual_size (int reg)
260 return (IA64_FR0_REGNUM <= reg && reg <= IA64_FR127_REGNUM) ? 16 : 8;
263 /* Return true iff register N's virtual format is different from
266 ia64_register_convertible (int nr)
268 return (IA64_FR0_REGNUM <= nr && nr <= IA64_FR127_REGNUM);
271 const struct floatformat floatformat_ia64_ext =
273 floatformat_little, 82, 0, 1, 17, 65535, 0x1ffff, 18, 64,
274 floatformat_intbit_yes
278 ia64_register_convert_to_virtual (int regnum, struct type *type,
279 char *from, char *to)
281 if (regnum >= IA64_FR0_REGNUM && regnum <= IA64_FR127_REGNUM)
284 floatformat_to_doublest (&floatformat_ia64_ext, from, &val);
285 store_floating(to, TYPE_LENGTH(type), val);
288 error("ia64_register_convert_to_virtual called with non floating point register number");
292 ia64_register_convert_to_raw (struct type *type, int regnum,
293 char *from, char *to)
295 if (regnum >= IA64_FR0_REGNUM && regnum <= IA64_FR127_REGNUM)
297 DOUBLEST val = extract_floating (from, TYPE_LENGTH(type));
298 floatformat_from_doublest (&floatformat_ia64_ext, &val, to);
301 error("ia64_register_convert_to_raw called with non floating point register number");
305 ia64_register_virtual_type (int reg)
307 if (reg >= IA64_FR0_REGNUM && reg <= IA64_FR127_REGNUM)
308 return builtin_type_long_double;
310 return builtin_type_long;
314 ia64_register_byte (int reg)
317 (reg <= IA64_FR0_REGNUM ? 0 : 8 * ((reg > IA64_FR127_REGNUM) ? 128 : reg - IA64_FR0_REGNUM));
320 /* Read the given register from a sigcontext structure in the
324 read_sigcontext_register (struct frame_info *frame, int regnum)
329 internal_error (__FILE__, __LINE__,
330 "read_sigcontext_register: NULL frame");
331 if (!frame->signal_handler_caller)
332 internal_error (__FILE__, __LINE__,
333 "read_sigcontext_register: frame not a signal_handler_caller");
334 if (SIGCONTEXT_REGISTER_ADDRESS == 0)
335 internal_error (__FILE__, __LINE__,
336 "read_sigcontext_register: SIGCONTEXT_REGISTER_ADDRESS is 0");
338 regaddr = SIGCONTEXT_REGISTER_ADDRESS (frame->frame, regnum);
340 return read_memory_integer (regaddr, REGISTER_RAW_SIZE (regnum));
342 internal_error (__FILE__, __LINE__,
343 "read_sigcontext_register: Register %d not in struct sigcontext", regnum);
346 /* Extract ``len'' bits from an instruction bundle starting at
350 extract_bit_field (char *bundle, int from, int len)
352 long long result = 0LL;
354 int from_byte = from / 8;
355 int to_byte = to / 8;
356 unsigned char *b = (unsigned char *) bundle;
362 if (from_byte == to_byte)
363 c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8);
364 result = c >> (from % 8);
365 lshift = 8 - (from % 8);
367 for (i = from_byte+1; i < to_byte; i++)
369 result |= ((long long) b[i]) << lshift;
373 if (from_byte < to_byte && (to % 8 != 0))
376 c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8);
377 result |= ((long long) c) << lshift;
383 /* Replace the specified bits in an instruction bundle */
386 replace_bit_field (char *bundle, long long val, int from, int len)
389 int from_byte = from / 8;
390 int to_byte = to / 8;
391 unsigned char *b = (unsigned char *) bundle;
394 if (from_byte == to_byte)
396 unsigned char left, right;
398 left = (c >> (to % 8)) << (to % 8);
399 right = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8);
400 c = (unsigned char) (val & 0xff);
401 c = (unsigned char) (c << (from % 8 + 8 - to % 8)) >> (8 - to % 8);
409 c = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8);
410 c = c | (val << (from % 8));
412 val >>= 8 - from % 8;
414 for (i = from_byte+1; i < to_byte; i++)
423 unsigned char cv = (unsigned char) val;
425 c = c >> (to % 8) << (to % 8);
426 c |= ((unsigned char) (cv << (8 - to % 8))) >> (8 - to % 8);
432 /* Return the contents of slot N (for N = 0, 1, or 2) in
433 and instruction bundle */
436 slotN_contents (char *bundle, int slotnum)
438 return extract_bit_field (bundle, 5+41*slotnum, 41);
441 /* Store an instruction in an instruction bundle */
444 replace_slotN_contents (char *bundle, long long instr, int slotnum)
446 replace_bit_field (bundle, instr, 5+41*slotnum, 41);
449 static enum instruction_type template_encoding_table[32][3] =
451 { M, I, I }, /* 00 */
452 { M, I, I }, /* 01 */
453 { M, I, I }, /* 02 */
454 { M, I, I }, /* 03 */
455 { M, L, X }, /* 04 */
456 { M, L, X }, /* 05 */
457 { undefined, undefined, undefined }, /* 06 */
458 { undefined, undefined, undefined }, /* 07 */
459 { M, M, I }, /* 08 */
460 { M, M, I }, /* 09 */
461 { M, M, I }, /* 0A */
462 { M, M, I }, /* 0B */
463 { M, F, I }, /* 0C */
464 { M, F, I }, /* 0D */
465 { M, M, F }, /* 0E */
466 { M, M, F }, /* 0F */
467 { M, I, B }, /* 10 */
468 { M, I, B }, /* 11 */
469 { M, B, B }, /* 12 */
470 { M, B, B }, /* 13 */
471 { undefined, undefined, undefined }, /* 14 */
472 { undefined, undefined, undefined }, /* 15 */
473 { B, B, B }, /* 16 */
474 { B, B, B }, /* 17 */
475 { M, M, B }, /* 18 */
476 { M, M, B }, /* 19 */
477 { undefined, undefined, undefined }, /* 1A */
478 { undefined, undefined, undefined }, /* 1B */
479 { M, F, B }, /* 1C */
480 { M, F, B }, /* 1D */
481 { undefined, undefined, undefined }, /* 1E */
482 { undefined, undefined, undefined }, /* 1F */
485 /* Fetch and (partially) decode an instruction at ADDR and return the
486 address of the next instruction to fetch. */
489 fetch_instruction (CORE_ADDR addr, instruction_type *it, long long *instr)
491 char bundle[BUNDLE_LEN];
492 int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER;
496 /* Warn about slot numbers greater than 2. We used to generate
497 an error here on the assumption that the user entered an invalid
498 address. But, sometimes GDB itself requests an invalid address.
499 This can (easily) happen when execution stops in a function for
500 which there are no symbols. The prologue scanner will attempt to
501 find the beginning of the function - if the nearest symbol
502 happens to not be aligned on a bundle boundary (16 bytes), the
503 resulting starting address will cause GDB to think that the slot
506 So we warn about it and set the slot number to zero. It is
507 not necessarily a fatal condition, particularly if debugging
508 at the assembly language level. */
511 warning ("Can't fetch instructions for slot numbers greater than 2.\n"
512 "Using slot 0 instead");
518 val = target_read_memory (addr, bundle, BUNDLE_LEN);
523 *instr = slotN_contents (bundle, slotnum);
524 template = extract_bit_field (bundle, 0, 5);
525 *it = template_encoding_table[(int)template][slotnum];
527 if (slotnum == 2 || (slotnum == 1 && *it == L))
530 addr += (slotnum + 1) * SLOT_MULTIPLIER;
535 /* There are 5 different break instructions (break.i, break.b,
536 break.m, break.f, and break.x), but they all have the same
537 encoding. (The five bit template in the low five bits of the
538 instruction bundle distinguishes one from another.)
540 The runtime architecture manual specifies that break instructions
541 used for debugging purposes must have the upper two bits of the 21
542 bit immediate set to a 0 and a 1 respectively. A breakpoint
543 instruction encodes the most significant bit of its 21 bit
544 immediate at bit 36 of the 41 bit instruction. The penultimate msb
545 is at bit 25 which leads to the pattern below.
547 Originally, I had this set up to do, e.g, a "break.i 0x80000" But
548 it turns out that 0x80000 was used as the syscall break in the early
549 simulators. So I changed the pattern slightly to do "break.i 0x080001"
550 instead. But that didn't work either (I later found out that this
551 pattern was used by the simulator that I was using.) So I ended up
552 using the pattern seen below. */
555 #define BREAKPOINT 0x00002000040LL
557 #define BREAKPOINT 0x00003333300LL
560 ia64_memory_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
562 char bundle[BUNDLE_LEN];
563 int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER;
568 error("Can't insert breakpoint for slot numbers greater than 2.");
572 val = target_read_memory (addr, bundle, BUNDLE_LEN);
573 instr = slotN_contents (bundle, slotnum);
574 memcpy(contents_cache, &instr, sizeof(instr));
575 replace_slotN_contents (bundle, BREAKPOINT, slotnum);
577 target_write_memory (addr, bundle, BUNDLE_LEN);
583 ia64_memory_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
585 char bundle[BUNDLE_LEN];
586 int slotnum = (addr & 0x0f) / SLOT_MULTIPLIER;
592 val = target_read_memory (addr, bundle, BUNDLE_LEN);
593 memcpy (&instr, contents_cache, sizeof instr);
594 replace_slotN_contents (bundle, instr, slotnum);
596 target_write_memory (addr, bundle, BUNDLE_LEN);
601 /* We don't really want to use this, but remote.c needs to call it in order
602 to figure out if Z-packets are supported or not. Oh, well. */
604 ia64_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
606 static unsigned char breakpoint[] =
607 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
608 *lenptr = sizeof (breakpoint);
616 ia64_read_pc (ptid_t ptid)
618 CORE_ADDR psr_value = read_register_pid (IA64_PSR_REGNUM, ptid);
619 CORE_ADDR pc_value = read_register_pid (IA64_IP_REGNUM, ptid);
620 int slot_num = (psr_value >> 41) & 3;
622 return pc_value | (slot_num * SLOT_MULTIPLIER);
626 ia64_write_pc (CORE_ADDR new_pc, ptid_t ptid)
628 int slot_num = (int) (new_pc & 0xf) / SLOT_MULTIPLIER;
629 CORE_ADDR psr_value = read_register_pid (IA64_PSR_REGNUM, ptid);
630 psr_value &= ~(3LL << 41);
631 psr_value |= (CORE_ADDR)(slot_num & 0x3) << 41;
635 write_register_pid (IA64_PSR_REGNUM, psr_value, ptid);
636 write_register_pid (IA64_IP_REGNUM, new_pc, ptid);
639 #define IS_NaT_COLLECTION_ADDR(addr) ((((addr) >> 3) & 0x3f) == 0x3f)
641 /* Returns the address of the slot that's NSLOTS slots away from
642 the address ADDR. NSLOTS may be positive or negative. */
644 rse_address_add(CORE_ADDR addr, int nslots)
647 int mandatory_nat_slots = nslots / 63;
648 int direction = nslots < 0 ? -1 : 1;
650 new_addr = addr + 8 * (nslots + mandatory_nat_slots);
652 if ((new_addr >> 9) != ((addr + 8 * 64 * mandatory_nat_slots) >> 9))
653 new_addr += 8 * direction;
655 if (IS_NaT_COLLECTION_ADDR(new_addr))
656 new_addr += 8 * direction;
661 /* The IA-64 frame chain is a bit odd. We won't always have a frame
662 pointer, so we use the SP value as the FP for the purpose of
663 creating a frame. There is sometimes a register (not fixed) which
664 is used as a frame pointer. When this register exists, it is not
665 especially hard to determine which one is being used. It isn't
666 even really hard to compute the frame chain, but it can be
667 computationally expensive. So, instead of making life difficult
668 (and slow), we pick a more convenient representation of the frame
669 chain, knowing that we'll have to make some small adjustments
670 in other places. (E.g, note that read_fp() and write_fp() are
671 actually read_sp() and write_sp() below in ia64_gdbarch_init()
674 Okay, so what is the frame chain exactly? It'll be the SP value
675 at the time that the function in question was entered.
677 Note that this *should* actually the frame pointer for the current
678 function! But as I note above, if we were to attempt to find the
679 address of the beginning of the previous frame, we'd waste a lot
680 of cycles for no good reason. So instead, we simply choose to
681 represent the frame chain as the end of the previous frame instead
685 ia64_frame_chain (struct frame_info *frame)
687 if (frame->signal_handler_caller)
688 return read_sigcontext_register (frame, sp_regnum);
689 else if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame))
693 FRAME_INIT_SAVED_REGS (frame);
694 if (frame->saved_regs[IA64_VFP_REGNUM])
695 return read_memory_integer (frame->saved_regs[IA64_VFP_REGNUM], 8);
697 return frame->frame + frame->extra_info->mem_stack_frame_size;
702 ia64_frame_saved_pc (struct frame_info *frame)
704 if (frame->signal_handler_caller)
705 return read_sigcontext_register (frame, pc_regnum);
706 else if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame))
707 return generic_read_register_dummy (frame->pc, frame->frame, pc_regnum);
710 FRAME_INIT_SAVED_REGS (frame);
712 if (frame->saved_regs[IA64_VRAP_REGNUM])
713 return read_memory_integer (frame->saved_regs[IA64_VRAP_REGNUM], 8);
714 else if (frame->next && frame->next->signal_handler_caller)
715 return read_sigcontext_register (frame->next, IA64_BR0_REGNUM);
716 else /* either frameless, or not far enough along in the prologue... */
717 return ia64_saved_pc_after_call (frame);
721 /* Limit the number of skipped non-prologue instructions since examining
722 of the prologue is expensive. */
723 static int max_skip_non_prologue_insns = 10;
725 /* Given PC representing the starting address of a function, and
726 LIM_PC which is the (sloppy) limit to which to scan when looking
727 for a prologue, attempt to further refine this limit by using
728 the line data in the symbol table. If successful, a better guess
729 on where the prologue ends is returned, otherwise the previous
730 value of lim_pc is returned. TRUST_LIMIT is a pointer to a flag
731 which will be set to indicate whether the returned limit may be
732 used with no further scanning in the event that the function is
736 refine_prologue_limit (CORE_ADDR pc, CORE_ADDR lim_pc, int *trust_limit)
738 struct symtab_and_line prologue_sal;
739 CORE_ADDR start_pc = pc;
741 /* Start off not trusting the limit. */
744 prologue_sal = find_pc_line (pc, 0);
745 if (prologue_sal.line != 0)
748 CORE_ADDR addr = prologue_sal.end;
750 /* Handle the case in which compiler's optimizer/scheduler
751 has moved instructions into the prologue. We scan ahead
752 in the function looking for address ranges whose corresponding
753 line number is less than or equal to the first one that we
754 found for the function. (It can be less than when the
755 scheduler puts a body instruction before the first prologue
757 for (i = 2 * max_skip_non_prologue_insns;
758 i > 0 && (lim_pc == 0 || addr < lim_pc);
761 struct symtab_and_line sal;
763 sal = find_pc_line (addr, 0);
766 if (sal.line <= prologue_sal.line
767 && sal.symtab == prologue_sal.symtab)
774 if (lim_pc == 0 || prologue_sal.end < lim_pc)
776 lim_pc = prologue_sal.end;
777 if (start_pc == get_pc_function_start (lim_pc))
784 #define isScratch(_regnum_) ((_regnum_) == 2 || (_regnum_) == 3 \
785 || (8 <= (_regnum_) && (_regnum_) <= 11) \
786 || (14 <= (_regnum_) && (_regnum_) <= 31))
787 #define imm9(_instr_) \
788 ( ((((_instr_) & 0x01000000000LL) ? -1 : 0) << 8) \
789 | (((_instr_) & 0x00008000000LL) >> 20) \
790 | (((_instr_) & 0x00000001fc0LL) >> 6))
793 examine_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct frame_info *frame)
796 CORE_ADDR last_prologue_pc = pc;
799 int do_fsr_stuff = 0;
804 int unat_save_reg = 0;
806 int mem_stack_frame_size = 0;
808 CORE_ADDR spill_addr = 0;
813 memset (instores, 0, sizeof instores);
814 memset (infpstores, 0, sizeof infpstores);
816 if (frame && !frame->saved_regs)
818 frame_saved_regs_zalloc (frame);
824 && frame->extra_info->after_prologue != 0
825 && frame->extra_info->after_prologue <= lim_pc)
826 return frame->extra_info->after_prologue;
828 lim_pc = refine_prologue_limit (pc, lim_pc, &trust_limit);
830 /* Must start with an alloc instruction */
831 next_pc = fetch_instruction (pc, &it, &instr);
832 if (pc < lim_pc && next_pc
833 && it == M && ((instr & 0x1ee0000003fLL) == 0x02c00000000LL))
836 int sor = (int) ((instr & 0x00078000000LL) >> 27);
837 int sol = (int) ((instr & 0x00007f00000LL) >> 20);
838 int sof = (int) ((instr & 0x000000fe000LL) >> 13);
839 /* Okay, so sor, sol, and sof aren't used right now; but perhaps
840 we could compare against the size given to us via the cfm as
841 either a sanity check or possibly to see if the frame has been
842 changed by a later alloc instruction... */
843 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
845 last_prologue_pc = next_pc;
850 pc = lim_pc; /* Frameless: We're done early. */
852 last_prologue_pc = lim_pc;
855 /* Loop, looking for prologue instructions, keeping track of
856 where preserved registers were spilled. */
859 next_pc = fetch_instruction (pc, &it, &instr);
863 if ((it == B && ((instr & 0x1e1f800003f) != 0x04000000000))
864 || ((instr & 0x3fLL) != 0LL))
866 /* Exit loop upon hitting a non-nop branch instruction
867 or a predicated instruction. */
870 else if (it == I && ((instr & 0x1eff8000000LL) == 0x00188000000LL))
873 int b2 = (int) ((instr & 0x0000000e000LL) >> 13);
874 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
875 int qp = (int) (instr & 0x0000000003f);
877 if (qp == 0 && b2 == 0 && rN >= 32 && ret_reg == 0)
880 last_prologue_pc = next_pc;
883 else if ((it == I || it == M)
884 && ((instr & 0x1ee00000000LL) == 0x10800000000LL))
886 /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */
887 int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13)
888 | ((instr & 0x001f8000000LL) >> 20)
889 | ((instr & 0x000000fe000LL) >> 13));
890 int rM = (int) ((instr & 0x00007f00000LL) >> 20);
891 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
892 int qp = (int) (instr & 0x0000000003fLL);
894 if (qp == 0 && rN >= 32 && imm == 0 && rM == 12 && fp_reg == 0)
898 last_prologue_pc = next_pc;
900 else if (qp == 0 && rN == 12 && rM == 12)
902 /* adds r12, -mem_stack_frame_size, r12 */
903 mem_stack_frame_size -= imm;
904 last_prologue_pc = next_pc;
906 else if (qp == 0 && rN == 2
907 && ((rM == fp_reg && fp_reg != 0) || rM == 12))
909 /* adds r2, spilloffset, rFramePointer
911 adds r2, spilloffset, r12
913 Get ready for stf.spill or st8.spill instructions.
914 The address to start spilling at is loaded into r2.
915 FIXME: Why r2? That's what gcc currently uses; it
916 could well be different for other compilers. */
918 /* Hmm... whether or not this will work will depend on
919 where the pc is. If it's still early in the prologue
920 this'll be wrong. FIXME */
921 spill_addr = (frame ? frame->frame : 0)
922 + (rM == 12 ? 0 : mem_stack_frame_size)
925 last_prologue_pc = next_pc;
929 && ( ((instr & 0x1efc0000000LL) == 0x0eec0000000LL)
930 || ((instr & 0x1ffc8000000LL) == 0x0cec0000000LL) ))
932 /* stf.spill [rN] = fM, imm9
934 stf.spill [rN] = fM */
936 int imm = imm9(instr);
937 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
938 int fM = (int) ((instr & 0x000000fe000LL) >> 13);
939 int qp = (int) (instr & 0x0000000003fLL);
940 if (qp == 0 && rN == spill_reg && spill_addr != 0
941 && ((2 <= fM && fM <= 5) || (16 <= fM && fM <= 31)))
944 frame->saved_regs[IA64_FR0_REGNUM + fM] = spill_addr;
946 if ((instr & 0x1efc0000000) == 0x0eec0000000)
949 spill_addr = 0; /* last one; must be done */
950 last_prologue_pc = next_pc;
953 else if ((it == M && ((instr & 0x1eff8000000LL) == 0x02110000000LL))
954 || (it == I && ((instr & 0x1eff8000000LL) == 0x00050000000LL)) )
960 int arM = (int) ((instr & 0x00007f00000LL) >> 20);
961 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
962 int qp = (int) (instr & 0x0000000003fLL);
963 if (qp == 0 && isScratch (rN) && arM == 36 /* ar.unat */)
965 /* We have something like "mov.m r3 = ar.unat". Remember the
966 r3 (or whatever) and watch for a store of this register... */
968 last_prologue_pc = next_pc;
971 else if (it == I && ((instr & 0x1eff8000000LL) == 0x00198000000LL))
974 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
975 int qp = (int) (instr & 0x0000000003fLL);
976 if (qp == 0 && isScratch (rN))
979 last_prologue_pc = next_pc;
983 && ( ((instr & 0x1ffc8000000LL) == 0x08cc0000000LL)
984 || ((instr & 0x1efc0000000LL) == 0x0acc0000000LL)))
988 st8 [rN] = rM, imm9 */
989 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
990 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
991 int qp = (int) (instr & 0x0000000003fLL);
992 if (qp == 0 && rN == spill_reg && spill_addr != 0
993 && (rM == unat_save_reg || rM == pr_save_reg))
995 /* We've found a spill of either the UNAT register or the PR
996 register. (Well, not exactly; what we've actually found is
997 a spill of the register that UNAT or PR was moved to).
998 Record that fact and move on... */
999 if (rM == unat_save_reg)
1001 /* Track UNAT register */
1003 frame->saved_regs[IA64_UNAT_REGNUM] = spill_addr;
1008 /* Track PR register */
1010 frame->saved_regs[IA64_PR_REGNUM] = spill_addr;
1013 if ((instr & 0x1efc0000000LL) == 0x0acc0000000LL)
1014 /* st8 [rN] = rM, imm9 */
1015 spill_addr += imm9(instr);
1017 spill_addr = 0; /* must be done spilling */
1018 last_prologue_pc = next_pc;
1020 else if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32])
1022 /* Allow up to one store of each input register. */
1023 instores[rM-32] = 1;
1024 last_prologue_pc = next_pc;
1027 else if (it == M && ((instr & 0x1ff08000000LL) == 0x08c00000000LL))
1034 Note that the st8 case is handled in the clause above.
1036 Advance over stores of input registers. One store per input
1037 register is permitted. */
1038 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1039 int qp = (int) (instr & 0x0000000003fLL);
1040 if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32])
1042 instores[rM-32] = 1;
1043 last_prologue_pc = next_pc;
1046 else if (it == M && ((instr & 0x1ff88000000LL) == 0x0cc80000000LL))
1053 Advance over stores of floating point input registers. Again
1054 one store per register is permitted */
1055 int fM = (int) ((instr & 0x000000fe000LL) >> 13);
1056 int qp = (int) (instr & 0x0000000003fLL);
1057 if (qp == 0 && 8 <= fM && fM < 16 && !infpstores[fM - 8])
1059 infpstores[fM-8] = 1;
1060 last_prologue_pc = next_pc;
1064 && ( ((instr & 0x1ffc8000000LL) == 0x08ec0000000LL)
1065 || ((instr & 0x1efc0000000LL) == 0x0aec0000000LL)))
1067 /* st8.spill [rN] = rM
1069 st8.spill [rN] = rM, imm9 */
1070 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1071 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1072 int qp = (int) (instr & 0x0000000003fLL);
1073 if (qp == 0 && rN == spill_reg && 4 <= rM && rM <= 7)
1075 /* We've found a spill of one of the preserved general purpose
1076 regs. Record the spill address and advance the spill
1077 register if appropriate. */
1079 frame->saved_regs[IA64_GR0_REGNUM + rM] = spill_addr;
1080 if ((instr & 0x1efc0000000LL) == 0x0aec0000000LL)
1081 /* st8.spill [rN] = rM, imm9 */
1082 spill_addr += imm9(instr);
1084 spill_addr = 0; /* Done spilling */
1085 last_prologue_pc = next_pc;
1097 /* Extract the size of the rotating portion of the stack
1098 frame and the register rename base from the current
1100 sor = ((frame->extra_info->cfm >> 14) & 0xf) * 8;
1101 rrb_gr = (frame->extra_info->cfm >> 18) & 0x7f;
1103 for (i = 0, addr = frame->extra_info->bsp;
1104 i < frame->extra_info->sof;
1107 if (IS_NaT_COLLECTION_ADDR (addr))
1112 frame->saved_regs[IA64_GR32_REGNUM + ((i + (sor - rrb_gr)) % sor)]
1115 frame->saved_regs[IA64_GR32_REGNUM + i] = addr;
1117 if (i+32 == cfm_reg)
1118 frame->saved_regs[IA64_CFM_REGNUM] = addr;
1119 if (i+32 == ret_reg)
1120 frame->saved_regs[IA64_VRAP_REGNUM] = addr;
1122 frame->saved_regs[IA64_VFP_REGNUM] = addr;
1126 if (frame && frame->extra_info) {
1127 frame->extra_info->after_prologue = last_prologue_pc;
1128 frame->extra_info->mem_stack_frame_size = mem_stack_frame_size;
1129 frame->extra_info->fp_reg = fp_reg;
1132 return last_prologue_pc;
1136 ia64_skip_prologue (CORE_ADDR pc)
1138 return examine_prologue (pc, pc+1024, 0);
1142 ia64_frame_init_saved_regs (struct frame_info *frame)
1144 if (frame->saved_regs)
1147 if (frame->signal_handler_caller && SIGCONTEXT_REGISTER_ADDRESS)
1151 frame_saved_regs_zalloc (frame);
1153 frame->saved_regs[IA64_VRAP_REGNUM] =
1154 SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_IP_REGNUM);
1155 frame->saved_regs[IA64_CFM_REGNUM] =
1156 SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_CFM_REGNUM);
1157 frame->saved_regs[IA64_PSR_REGNUM] =
1158 SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_PSR_REGNUM);
1160 frame->saved_regs[IA64_BSP_REGNUM] =
1161 SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_BSP_REGNUM);
1163 frame->saved_regs[IA64_RNAT_REGNUM] =
1164 SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_RNAT_REGNUM);
1165 frame->saved_regs[IA64_CCV_REGNUM] =
1166 SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_CCV_REGNUM);
1167 frame->saved_regs[IA64_UNAT_REGNUM] =
1168 SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_UNAT_REGNUM);
1169 frame->saved_regs[IA64_FPSR_REGNUM] =
1170 SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_FPSR_REGNUM);
1171 frame->saved_regs[IA64_PFS_REGNUM] =
1172 SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_PFS_REGNUM);
1173 frame->saved_regs[IA64_LC_REGNUM] =
1174 SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_LC_REGNUM);
1175 for (regno = IA64_GR1_REGNUM; regno <= IA64_GR31_REGNUM; regno++)
1176 if (regno != sp_regnum)
1177 frame->saved_regs[regno] =
1178 SIGCONTEXT_REGISTER_ADDRESS (frame->frame, regno);
1179 for (regno = IA64_BR0_REGNUM; regno <= IA64_BR7_REGNUM; regno++)
1180 frame->saved_regs[regno] =
1181 SIGCONTEXT_REGISTER_ADDRESS (frame->frame, regno);
1182 for (regno = IA64_FR2_REGNUM; regno <= IA64_BR7_REGNUM; regno++)
1183 frame->saved_regs[regno] =
1184 SIGCONTEXT_REGISTER_ADDRESS (frame->frame, regno);
1188 CORE_ADDR func_start;
1190 func_start = get_pc_function_start (frame->pc);
1191 examine_prologue (func_start, frame->pc, frame);
1196 ia64_get_saved_register (char *raw_buffer,
1199 struct frame_info *frame,
1201 enum lval_type *lval)
1205 if (!target_has_registers)
1206 error ("No registers.");
1208 if (optimized != NULL)
1217 is_dummy_frame = PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame);
1219 if (regnum == SP_REGNUM && frame->next)
1221 /* Handle SP values for all frames but the topmost. */
1222 store_address (raw_buffer, REGISTER_RAW_SIZE (regnum), frame->frame);
1224 else if (regnum == IA64_BSP_REGNUM)
1226 store_address (raw_buffer, REGISTER_RAW_SIZE (regnum),
1227 frame->extra_info->bsp);
1229 else if (regnum == IA64_VFP_REGNUM)
1231 /* If the function in question uses an automatic register (r32-r127)
1232 for the frame pointer, it'll be found by ia64_find_saved_register()
1233 above. If the function lacks one of these frame pointers, we can
1234 still provide a value since we know the size of the frame */
1235 CORE_ADDR vfp = frame->frame + frame->extra_info->mem_stack_frame_size;
1236 store_address (raw_buffer, REGISTER_RAW_SIZE (IA64_VFP_REGNUM), vfp);
1238 else if (IA64_PR0_REGNUM <= regnum && regnum <= IA64_PR63_REGNUM)
1240 char *pr_raw_buffer = alloca (MAX_REGISTER_RAW_SIZE);
1242 enum lval_type pr_lval;
1245 ia64_get_saved_register (pr_raw_buffer, &pr_optim, &pr_addr,
1246 frame, IA64_PR_REGNUM, &pr_lval);
1247 if (IA64_PR16_REGNUM <= regnum && regnum <= IA64_PR63_REGNUM)
1249 /* Fetch predicate register rename base from current frame
1250 marker for this frame. */
1251 int rrb_pr = (frame->extra_info->cfm >> 32) & 0x3f;
1253 /* Adjust the register number to account for register rotation. */
1254 regnum = IA64_PR16_REGNUM
1255 + ((regnum - IA64_PR16_REGNUM) + rrb_pr) % 48;
1257 prN_val = extract_bit_field ((unsigned char *) pr_raw_buffer,
1258 regnum - IA64_PR0_REGNUM, 1);
1259 store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum), prN_val);
1261 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
1263 char *unat_raw_buffer = alloca (MAX_REGISTER_RAW_SIZE);
1265 enum lval_type unat_lval;
1266 CORE_ADDR unat_addr;
1268 ia64_get_saved_register (unat_raw_buffer, &unat_optim, &unat_addr,
1269 frame, IA64_UNAT_REGNUM, &unat_lval);
1270 unatN_val = extract_bit_field ((unsigned char *) unat_raw_buffer,
1271 regnum - IA64_NAT0_REGNUM, 1);
1272 store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum),
1275 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
1278 /* Find address of general register corresponding to nat bit we're
1280 CORE_ADDR gr_addr = 0;
1282 if (!is_dummy_frame)
1284 FRAME_INIT_SAVED_REGS (frame);
1285 gr_addr = frame->saved_regs[ regnum - IA64_NAT0_REGNUM
1290 /* Compute address of nat collection bits */
1291 CORE_ADDR nat_addr = gr_addr | 0x1f8;
1292 CORE_ADDR bsp = read_register (IA64_BSP_REGNUM);
1293 CORE_ADDR nat_collection;
1295 /* If our nat collection address is bigger than bsp, we have to get
1296 the nat collection from rnat. Otherwise, we fetch the nat
1297 collection from the computed address. */
1298 if (nat_addr >= bsp)
1299 nat_collection = read_register (IA64_RNAT_REGNUM);
1301 nat_collection = read_memory_integer (nat_addr, 8);
1302 nat_bit = (gr_addr >> 3) & 0x3f;
1303 natval = (nat_collection >> nat_bit) & 1;
1305 store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum), natval);
1307 else if (regnum == IA64_IP_REGNUM)
1312 /* FIXME: Set *addrp, *lval when possible. */
1313 pc = ia64_frame_saved_pc (frame->next);
1319 store_address (raw_buffer, REGISTER_RAW_SIZE (IA64_IP_REGNUM), pc);
1321 else if (IA64_GR32_REGNUM <= regnum && regnum <= IA64_GR127_REGNUM)
1324 if (!is_dummy_frame)
1326 FRAME_INIT_SAVED_REGS (frame);
1327 addr = frame->saved_regs[regnum];
1333 *lval = lval_memory;
1336 read_memory (addr, raw_buffer, REGISTER_RAW_SIZE (regnum));
1340 /* r32 - r127 must be fetchable via memory. If they aren't,
1341 then the register is unavailable */
1342 memset (raw_buffer, 0, REGISTER_RAW_SIZE (regnum));
1347 if (IA64_FR32_REGNUM <= regnum && regnum <= IA64_FR127_REGNUM)
1349 /* Fetch floating point register rename base from current
1350 frame marker for this frame. */
1351 int rrb_fr = (frame->extra_info->cfm >> 25) & 0x7f;
1353 /* Adjust the floating point register number to account for
1354 register rotation. */
1355 regnum = IA64_FR32_REGNUM
1356 + ((regnum - IA64_FR32_REGNUM) + rrb_fr) % 96;
1359 generic_get_saved_register (raw_buffer, optimized, addrp, frame,
1364 /* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of
1365 EXTRACT_RETURN_VALUE? GCC_P is true if compiled with gcc
1366 and TYPE is the type (which is known to be struct, union or array). */
1368 ia64_use_struct_convention (int gcc_p, struct type *type)
1370 struct type *float_elt_type;
1372 /* HFAs are structures (or arrays) consisting entirely of floating
1373 point values of the same length. Up to 8 of these are returned
1374 in registers. Don't use the struct convention when this is the
1376 float_elt_type = is_float_or_hfa_type (type);
1377 if (float_elt_type != NULL
1378 && TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type) <= 8)
1381 /* Other structs of length 32 or less are returned in r8-r11.
1382 Don't use the struct convention for those either. */
1383 return TYPE_LENGTH (type) > 32;
1387 ia64_extract_return_value (struct type *type, char *regbuf, char *valbuf)
1389 struct type *float_elt_type;
1391 float_elt_type = is_float_or_hfa_type (type);
1392 if (float_elt_type != NULL)
1395 int regnum = IA64_FR8_REGNUM;
1396 int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type);
1400 ia64_register_convert_to_virtual (regnum, float_elt_type,
1401 ®buf[REGISTER_BYTE (regnum)], valbuf + offset);
1402 offset += TYPE_LENGTH (float_elt_type);
1407 memcpy (valbuf, ®buf[REGISTER_BYTE (IA64_GR8_REGNUM)],
1408 TYPE_LENGTH (type));
1411 /* FIXME: Turn this into a stack of some sort. Unfortunately, something
1412 like this is necessary though since the IA-64 calling conventions specify
1413 that r8 is not preserved. */
1414 static CORE_ADDR struct_return_address;
1417 ia64_extract_struct_value_address (char *regbuf)
1419 /* FIXME: See above. */
1420 return struct_return_address;
1424 ia64_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
1426 /* FIXME: See above. */
1427 /* Note that most of the work was done in ia64_push_arguments() */
1428 struct_return_address = addr;
1432 ia64_frameless_function_invocation (struct frame_info *frame)
1434 FRAME_INIT_SAVED_REGS (frame);
1435 return (frame->extra_info->mem_stack_frame_size == 0);
1439 ia64_saved_pc_after_call (struct frame_info *frame)
1441 return read_register (IA64_BR0_REGNUM);
1445 ia64_frame_args_address (struct frame_info *frame)
1447 /* frame->frame points at the SP for this frame; But we want the start
1448 of the frame, not the end. Calling frame chain will get his for us. */
1449 return ia64_frame_chain (frame);
1453 ia64_frame_locals_address (struct frame_info *frame)
1455 /* frame->frame points at the SP for this frame; But we want the start
1456 of the frame, not the end. Calling frame chain will get his for us. */
1457 return ia64_frame_chain (frame);
1461 ia64_init_extra_frame_info (int fromleaf, struct frame_info *frame)
1464 int next_frame_is_call_dummy = ((frame->next != NULL)
1465 && PC_IN_CALL_DUMMY (frame->next->pc, frame->next->frame,
1466 frame->next->frame));
1468 frame->extra_info = (struct frame_extra_info *)
1469 frame_obstack_alloc (sizeof (struct frame_extra_info));
1471 if (frame->next == 0)
1473 bsp = read_register (IA64_BSP_REGNUM);
1474 cfm = read_register (IA64_CFM_REGNUM);
1477 else if (frame->next->signal_handler_caller)
1479 bsp = read_sigcontext_register (frame->next, IA64_BSP_REGNUM);
1480 cfm = read_sigcontext_register (frame->next, IA64_CFM_REGNUM);
1482 else if (next_frame_is_call_dummy)
1484 bsp = generic_read_register_dummy (frame->next->pc, frame->next->frame,
1486 cfm = generic_read_register_dummy (frame->next->pc, frame->next->frame,
1491 struct frame_info *frn = frame->next;
1493 FRAME_INIT_SAVED_REGS (frn);
1495 if (frn->saved_regs[IA64_CFM_REGNUM] != 0)
1496 cfm = read_memory_integer (frn->saved_regs[IA64_CFM_REGNUM], 8);
1497 else if (frn->next && frn->next->signal_handler_caller)
1498 cfm = read_sigcontext_register (frn->next, IA64_PFS_REGNUM);
1500 && PC_IN_CALL_DUMMY (frn->next->pc, frn->next->frame,
1502 cfm = generic_read_register_dummy (frn->next->pc, frn->next->frame,
1505 cfm = read_register (IA64_PFS_REGNUM);
1507 bsp = frn->extra_info->bsp;
1509 frame->extra_info->cfm = cfm;
1510 frame->extra_info->sof = cfm & 0x7f;
1511 frame->extra_info->sol = (cfm >> 7) & 0x7f;
1512 if (frame->next == 0
1513 || frame->next->signal_handler_caller
1514 || next_frame_is_call_dummy)
1515 frame->extra_info->bsp = rse_address_add (bsp, -frame->extra_info->sof);
1517 frame->extra_info->bsp = rse_address_add (bsp, -frame->extra_info->sol);
1519 frame->extra_info->after_prologue = 0;
1520 frame->extra_info->mem_stack_frame_size = -1; /* Not yet determined */
1521 frame->extra_info->fp_reg = 0;
1525 is_float_or_hfa_type_recurse (struct type *t, struct type **etp)
1527 switch (TYPE_CODE (t))
1531 return TYPE_LENGTH (*etp) == TYPE_LENGTH (t);
1538 case TYPE_CODE_ARRAY:
1540 is_float_or_hfa_type_recurse (check_typedef (TYPE_TARGET_TYPE (t)),
1543 case TYPE_CODE_STRUCT:
1547 for (i = 0; i < TYPE_NFIELDS (t); i++)
1548 if (!is_float_or_hfa_type_recurse
1549 (check_typedef (TYPE_FIELD_TYPE (t, i)), etp))
1560 /* Determine if the given type is one of the floating point types or
1561 and HFA (which is a struct, array, or combination thereof whose
1562 bottom-most elements are all of the same floating point type.) */
1564 static struct type *
1565 is_float_or_hfa_type (struct type *t)
1567 struct type *et = 0;
1569 return is_float_or_hfa_type_recurse (t, &et) ? et : 0;
1573 /* Return 1 if the alignment of T is such that the next even slot
1574 should be used. Return 0, if the next available slot should
1575 be used. (See section 8.5.1 of the IA-64 Software Conventions
1576 and Runtime manual.) */
1579 slot_alignment_is_next_even (struct type *t)
1581 switch (TYPE_CODE (t))
1585 if (TYPE_LENGTH (t) > 8)
1589 case TYPE_CODE_ARRAY:
1591 slot_alignment_is_next_even (check_typedef (TYPE_TARGET_TYPE (t)));
1592 case TYPE_CODE_STRUCT:
1596 for (i = 0; i < TYPE_NFIELDS (t); i++)
1597 if (slot_alignment_is_next_even
1598 (check_typedef (TYPE_FIELD_TYPE (t, i))))
1607 /* Attempt to find (and return) the global pointer for the given
1610 This is a rather nasty bit of code searchs for the .dynamic section
1611 in the objfile corresponding to the pc of the function we're trying
1612 to call. Once it finds the addresses at which the .dynamic section
1613 lives in the child process, it scans the Elf64_Dyn entries for a
1614 DT_PLTGOT tag. If it finds one of these, the corresponding
1615 d_un.d_ptr value is the global pointer. */
1618 generic_elf_find_global_pointer (CORE_ADDR faddr)
1620 struct obj_section *faddr_sect;
1622 faddr_sect = find_pc_section (faddr);
1623 if (faddr_sect != NULL)
1625 struct obj_section *osect;
1627 ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
1629 if (strcmp (osect->the_bfd_section->name, ".dynamic") == 0)
1633 if (osect < faddr_sect->objfile->sections_end)
1638 while (addr < osect->endaddr)
1644 status = target_read_memory (addr, buf, sizeof (buf));
1647 tag = extract_signed_integer (buf, sizeof (buf));
1649 if (tag == DT_PLTGOT)
1651 CORE_ADDR global_pointer;
1653 status = target_read_memory (addr + 8, buf, sizeof (buf));
1656 global_pointer = extract_address (buf, sizeof (buf));
1659 return global_pointer;
1672 /* Given a function's address, attempt to find (and return) the
1673 corresponding (canonical) function descriptor. Return 0 if
1676 find_extant_func_descr (CORE_ADDR faddr)
1678 struct obj_section *faddr_sect;
1680 /* Return early if faddr is already a function descriptor */
1681 faddr_sect = find_pc_section (faddr);
1682 if (faddr_sect && strcmp (faddr_sect->the_bfd_section->name, ".opd") == 0)
1685 if (faddr_sect != NULL)
1687 struct obj_section *osect;
1688 ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
1690 if (strcmp (osect->the_bfd_section->name, ".opd") == 0)
1694 if (osect < faddr_sect->objfile->sections_end)
1699 while (addr < osect->endaddr)
1705 status = target_read_memory (addr, buf, sizeof (buf));
1708 faddr2 = extract_signed_integer (buf, sizeof (buf));
1710 if (faddr == faddr2)
1720 /* Attempt to find a function descriptor corresponding to the
1721 given address. If none is found, construct one on the
1722 stack using the address at fdaptr */
1725 find_func_descr (CORE_ADDR faddr, CORE_ADDR *fdaptr)
1729 fdesc = find_extant_func_descr (faddr);
1733 CORE_ADDR global_pointer;
1739 global_pointer = FIND_GLOBAL_POINTER (faddr);
1741 if (global_pointer == 0)
1742 global_pointer = read_register (IA64_GR1_REGNUM);
1744 store_address (buf, 8, faddr);
1745 store_address (buf + 8, 8, global_pointer);
1747 write_memory (fdesc, buf, 16);
1754 ia64_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
1755 int struct_return, CORE_ADDR struct_addr)
1761 int nslots, rseslots, memslots, slotnum, nfuncargs;
1763 CORE_ADDR bsp, cfm, pfs, new_bsp, funcdescaddr;
1767 /* Count the number of slots needed for the arguments */
1768 for (argno = 0; argno < nargs; argno++)
1771 type = check_typedef (VALUE_TYPE (arg));
1772 len = TYPE_LENGTH (type);
1774 if ((nslots & 1) && slot_alignment_is_next_even (type))
1777 if (TYPE_CODE (type) == TYPE_CODE_FUNC)
1780 nslots += (len + 7) / 8;
1783 /* Divvy up the slots between the RSE and the memory stack */
1784 rseslots = (nslots > 8) ? 8 : nslots;
1785 memslots = nslots - rseslots;
1787 /* Allocate a new RSE frame */
1788 cfm = read_register (IA64_CFM_REGNUM);
1790 bsp = read_register (IA64_BSP_REGNUM);
1791 bsp = rse_address_add (bsp, cfm & 0x7f);
1792 new_bsp = rse_address_add (bsp, rseslots);
1793 write_register (IA64_BSP_REGNUM, new_bsp);
1795 pfs = read_register (IA64_PFS_REGNUM);
1796 pfs &= 0xc000000000000000LL;
1797 pfs |= (cfm & 0xffffffffffffLL);
1798 write_register (IA64_PFS_REGNUM, pfs);
1800 cfm &= 0xc000000000000000LL;
1802 write_register (IA64_CFM_REGNUM, cfm);
1804 /* We will attempt to find function descriptors in the .opd segment,
1805 but if we can't we'll construct them ourselves. That being the
1806 case, we'll need to reserve space on the stack for them. */
1807 funcdescaddr = sp - nfuncargs * 16;
1808 funcdescaddr &= ~0xfLL;
1810 /* Adjust the stack pointer to it's new value. The calling conventions
1811 require us to have 16 bytes of scratch, plus whatever space is
1812 necessary for the memory slots and our function descriptors */
1813 sp = sp - 16 - (memslots + nfuncargs) * 8;
1814 sp &= ~0xfLL; /* Maintain 16 byte alignment */
1816 /* Place the arguments where they belong. The arguments will be
1817 either placed in the RSE backing store or on the memory stack.
1818 In addition, floating point arguments or HFAs are placed in
1819 floating point registers. */
1821 floatreg = IA64_FR8_REGNUM;
1822 for (argno = 0; argno < nargs; argno++)
1824 struct type *float_elt_type;
1827 type = check_typedef (VALUE_TYPE (arg));
1828 len = TYPE_LENGTH (type);
1830 /* Special handling for function parameters */
1832 && TYPE_CODE (type) == TYPE_CODE_PTR
1833 && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC)
1837 store_address (val_buf, 8,
1838 find_func_descr (extract_address (VALUE_CONTENTS (arg), 8),
1840 if (slotnum < rseslots)
1841 write_memory (rse_address_add (bsp, slotnum), val_buf, 8);
1843 write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8);
1850 /* Skip odd slot if necessary... */
1851 if ((slotnum & 1) && slot_alignment_is_next_even (type))
1859 memset (val_buf, 0, 8);
1860 memcpy (val_buf, VALUE_CONTENTS (arg) + argoffset, (len > 8) ? 8 : len);
1862 if (slotnum < rseslots)
1863 write_memory (rse_address_add (bsp, slotnum), val_buf, 8);
1865 write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8);
1872 /* Handle floating point types (including HFAs) */
1873 float_elt_type = is_float_or_hfa_type (type);
1874 if (float_elt_type != NULL)
1877 len = TYPE_LENGTH (type);
1878 while (len > 0 && floatreg < IA64_FR16_REGNUM)
1880 ia64_register_convert_to_raw (
1883 VALUE_CONTENTS (arg) + argoffset,
1884 ®isters[REGISTER_BYTE (floatreg)]);
1886 argoffset += TYPE_LENGTH (float_elt_type);
1887 len -= TYPE_LENGTH (float_elt_type);
1892 /* Store the struct return value in r8 if necessary. */
1895 store_address (®isters[REGISTER_BYTE (IA64_GR8_REGNUM)],
1896 REGISTER_RAW_SIZE (IA64_GR8_REGNUM),
1900 /* Sync gdb's idea of what the registers are with the target. */
1901 target_store_registers (-1);
1903 /* FIXME: This doesn't belong here! Instead, SAVE_DUMMY_FRAME_TOS needs
1904 to be defined to call generic_save_dummy_frame_tos(). But at the
1905 time of this writing, SAVE_DUMMY_FRAME_TOS wasn't gdbarch'd, so
1906 I chose to put this call here instead of using the old mechanisms.
1907 Once SAVE_DUMMY_FRAME_TOS is gdbarch'd, all we need to do is add the
1910 set_gdbarch_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos);
1912 to ia64_gdbarch_init() and remove the line below. */
1913 generic_save_dummy_frame_tos (sp);
1919 ia64_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
1921 CORE_ADDR global_pointer = FIND_GLOBAL_POINTER (pc);
1923 if (global_pointer != 0)
1924 write_register (IA64_GR1_REGNUM, global_pointer);
1926 write_register (IA64_BR0_REGNUM, CALL_DUMMY_ADDRESS ());
1931 ia64_store_return_value (struct type *type, char *valbuf)
1933 if (TYPE_CODE (type) == TYPE_CODE_FLT)
1935 ia64_register_convert_to_raw (type, IA64_FR8_REGNUM, valbuf,
1936 ®isters[REGISTER_BYTE (IA64_FR8_REGNUM)]);
1937 target_store_registers (IA64_FR8_REGNUM);
1940 write_register_bytes (REGISTER_BYTE (IA64_GR8_REGNUM),
1941 valbuf, TYPE_LENGTH (type));
1945 ia64_pop_frame (void)
1947 generic_pop_current_frame (ia64_pop_frame_regular);
1951 ia64_pop_frame_regular (struct frame_info *frame)
1954 CORE_ADDR bsp, cfm, pfs;
1956 FRAME_INIT_SAVED_REGS (frame);
1958 for (regno = 0; regno < ia64_num_regs; regno++)
1960 if (frame->saved_regs[regno]
1961 && (!(IA64_GR32_REGNUM <= regno && regno <= IA64_GR127_REGNUM))
1962 && regno != pc_regnum
1963 && regno != sp_regnum
1964 && regno != IA64_PFS_REGNUM
1965 && regno != IA64_CFM_REGNUM
1966 && regno != IA64_BSP_REGNUM
1967 && regno != IA64_BSPSTORE_REGNUM)
1969 write_register (regno,
1970 read_memory_integer (frame->saved_regs[regno],
1971 REGISTER_RAW_SIZE (regno)));
1975 write_register (sp_regnum, FRAME_CHAIN (frame));
1976 write_pc (FRAME_SAVED_PC (frame));
1978 cfm = read_register (IA64_CFM_REGNUM);
1980 if (frame->saved_regs[IA64_PFS_REGNUM])
1982 pfs = read_memory_integer (frame->saved_regs[IA64_PFS_REGNUM],
1983 REGISTER_RAW_SIZE (IA64_PFS_REGNUM));
1986 pfs = read_register (IA64_PFS_REGNUM);
1988 /* Compute the new bsp by *adding* the difference between the
1989 size of the frame and the size of the locals (both wrt the
1990 frame that we're going back to). This seems kind of strange,
1991 especially since it seems like we ought to be subtracting the
1992 size of the locals... and we should; but the linux kernel
1993 wants bsp to be set at the end of all used registers. It's
1994 likely that this code will need to be revised to accomodate
1995 other operating systems. */
1996 bsp = rse_address_add (frame->extra_info->bsp,
1997 (pfs & 0x7f) - ((pfs >> 7) & 0x7f));
1998 write_register (IA64_BSP_REGNUM, bsp);
2000 /* FIXME: What becomes of the epilog count in the PFS? */
2001 cfm = (cfm & ~0xffffffffffffLL) | (pfs & 0xffffffffffffLL);
2002 write_register (IA64_CFM_REGNUM, cfm);
2004 flush_cached_frames ();
2008 ia64_remote_translate_xfer_address (CORE_ADDR memaddr, int nr_bytes,
2009 CORE_ADDR *targ_addr, int *targ_len)
2011 *targ_addr = memaddr;
2012 *targ_len = nr_bytes;
2016 process_note_abi_tag_sections (bfd *abfd, asection *sect, void *obj)
2018 int *os_ident_ptr = obj;
2020 unsigned int sectsize;
2022 name = bfd_get_section_name (abfd, sect);
2023 sectsize = bfd_section_size (abfd, sect);
2024 if (strcmp (name, ".note.ABI-tag") == 0 && sectsize > 0)
2026 unsigned int name_length, data_length, note_type;
2027 char *note = alloca (sectsize);
2029 bfd_get_section_contents (abfd, sect, note,
2030 (file_ptr) 0, (bfd_size_type) sectsize);
2032 name_length = bfd_h_get_32 (abfd, note);
2033 data_length = bfd_h_get_32 (abfd, note + 4);
2034 note_type = bfd_h_get_32 (abfd, note + 8);
2036 if (name_length == 4 && data_length == 16 && note_type == 1
2037 && strcmp (note + 12, "GNU") == 0)
2039 int os_number = bfd_h_get_32 (abfd, note + 16);
2041 /* The case numbers are from abi-tags in glibc */
2045 *os_ident_ptr = ELFOSABI_LINUX;
2048 *os_ident_ptr = ELFOSABI_HURD;
2051 *os_ident_ptr = ELFOSABI_SOLARIS;
2054 internal_error (__FILE__, __LINE__,
2055 "process_note_abi_sections: unknown OS number %d", os_number);
2062 static struct gdbarch *
2063 ia64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
2065 struct gdbarch *gdbarch;
2066 struct gdbarch_tdep *tdep;
2069 if (info.abfd != NULL
2070 && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour)
2072 os_ident = elf_elfheader (info.abfd)->e_ident[EI_OSABI];
2074 /* If os_ident is 0, it is not necessarily the case that we're on a
2075 SYSV system. (ELFOSABI_NONE is defined to be 0.) GNU/Linux uses
2076 a note section to record OS/ABI info, but leaves e_ident[EI_OSABI]
2077 zero. So we have to check for note sections too. */
2080 bfd_map_over_sections (info.abfd,
2081 process_note_abi_tag_sections,
2088 for (arches = gdbarch_list_lookup_by_info (arches, &info);
2090 arches = gdbarch_list_lookup_by_info (arches->next, &info))
2092 if (gdbarch_tdep (current_gdbarch)->os_ident != os_ident)
2094 return arches->gdbarch;
2097 tdep = xmalloc (sizeof (struct gdbarch_tdep));
2098 gdbarch = gdbarch_alloc (&info, tdep);
2099 tdep->os_ident = os_ident;
2102 /* Set the method of obtaining the sigcontext addresses at which
2103 registers are saved. The method of checking to see if
2104 native_find_global_pointer is nonzero to indicate that we're
2105 on AIX is kind of hokey, but I can't think of a better way
2107 if (os_ident == ELFOSABI_LINUX)
2108 tdep->sigcontext_register_address = ia64_linux_sigcontext_register_address;
2109 else if (native_find_global_pointer != 0)
2110 tdep->sigcontext_register_address = ia64_aix_sigcontext_register_address;
2112 tdep->sigcontext_register_address = 0;
2114 /* We know that Linux won't have to resort to the native_find_global_pointer
2115 hackery. But that's the only one we know about so far, so if
2116 native_find_global_pointer is set to something non-zero, then use
2117 it. Otherwise fall back to using generic_elf_find_global_pointer.
2118 This arrangement should (in theory) allow us to cross debug Linux
2119 binaries from an AIX machine. */
2120 if (os_ident == ELFOSABI_LINUX)
2121 tdep->find_global_pointer = generic_elf_find_global_pointer;
2122 else if (native_find_global_pointer != 0)
2123 tdep->find_global_pointer = native_find_global_pointer;
2125 tdep->find_global_pointer = generic_elf_find_global_pointer;
2127 set_gdbarch_short_bit (gdbarch, 16);
2128 set_gdbarch_int_bit (gdbarch, 32);
2129 set_gdbarch_long_bit (gdbarch, 64);
2130 set_gdbarch_long_long_bit (gdbarch, 64);
2131 set_gdbarch_float_bit (gdbarch, 32);
2132 set_gdbarch_double_bit (gdbarch, 64);
2133 set_gdbarch_long_double_bit (gdbarch, 64);
2134 set_gdbarch_ptr_bit (gdbarch, 64);
2136 set_gdbarch_num_regs (gdbarch, ia64_num_regs);
2137 set_gdbarch_sp_regnum (gdbarch, sp_regnum);
2138 set_gdbarch_fp_regnum (gdbarch, fp_regnum);
2139 set_gdbarch_pc_regnum (gdbarch, pc_regnum);
2140 set_gdbarch_fp0_regnum (gdbarch, IA64_FR0_REGNUM);
2142 set_gdbarch_register_name (gdbarch, ia64_register_name);
2143 set_gdbarch_register_size (gdbarch, 8);
2144 set_gdbarch_register_bytes (gdbarch, ia64_num_regs * 8 + 128*8);
2145 set_gdbarch_register_byte (gdbarch, ia64_register_byte);
2146 set_gdbarch_register_raw_size (gdbarch, ia64_register_raw_size);
2147 set_gdbarch_max_register_raw_size (gdbarch, 16);
2148 set_gdbarch_register_virtual_size (gdbarch, ia64_register_virtual_size);
2149 set_gdbarch_max_register_virtual_size (gdbarch, 16);
2150 set_gdbarch_register_virtual_type (gdbarch, ia64_register_virtual_type);
2152 set_gdbarch_skip_prologue (gdbarch, ia64_skip_prologue);
2154 set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
2155 set_gdbarch_frameless_function_invocation (gdbarch, ia64_frameless_function_invocation);
2157 set_gdbarch_saved_pc_after_call (gdbarch, ia64_saved_pc_after_call);
2159 set_gdbarch_frame_chain (gdbarch, ia64_frame_chain);
2160 set_gdbarch_frame_chain_valid (gdbarch, generic_func_frame_chain_valid);
2161 set_gdbarch_frame_saved_pc (gdbarch, ia64_frame_saved_pc);
2163 set_gdbarch_frame_init_saved_regs (gdbarch, ia64_frame_init_saved_regs);
2164 set_gdbarch_get_saved_register (gdbarch, ia64_get_saved_register);
2166 set_gdbarch_register_convertible (gdbarch, ia64_register_convertible);
2167 set_gdbarch_register_convert_to_virtual (gdbarch, ia64_register_convert_to_virtual);
2168 set_gdbarch_register_convert_to_raw (gdbarch, ia64_register_convert_to_raw);
2170 set_gdbarch_use_struct_convention (gdbarch, ia64_use_struct_convention);
2171 set_gdbarch_extract_return_value (gdbarch, ia64_extract_return_value);
2173 set_gdbarch_store_struct_return (gdbarch, ia64_store_struct_return);
2174 set_gdbarch_store_return_value (gdbarch, ia64_store_return_value);
2175 set_gdbarch_extract_struct_value_address (gdbarch, ia64_extract_struct_value_address);
2177 set_gdbarch_memory_insert_breakpoint (gdbarch, ia64_memory_insert_breakpoint);
2178 set_gdbarch_memory_remove_breakpoint (gdbarch, ia64_memory_remove_breakpoint);
2179 set_gdbarch_breakpoint_from_pc (gdbarch, ia64_breakpoint_from_pc);
2180 set_gdbarch_read_pc (gdbarch, ia64_read_pc);
2181 set_gdbarch_write_pc (gdbarch, ia64_write_pc);
2183 /* Settings for calling functions in the inferior. */
2184 set_gdbarch_use_generic_dummy_frames (gdbarch, 1);
2185 set_gdbarch_call_dummy_length (gdbarch, 0);
2186 set_gdbarch_push_arguments (gdbarch, ia64_push_arguments);
2187 set_gdbarch_push_return_address (gdbarch, ia64_push_return_address);
2188 set_gdbarch_pop_frame (gdbarch, ia64_pop_frame);
2190 set_gdbarch_call_dummy_p (gdbarch, 1);
2191 set_gdbarch_call_dummy_words (gdbarch, ia64_call_dummy_words);
2192 set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof (ia64_call_dummy_words));
2193 set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
2194 set_gdbarch_init_extra_frame_info (gdbarch, ia64_init_extra_frame_info);
2195 set_gdbarch_frame_args_address (gdbarch, ia64_frame_args_address);
2196 set_gdbarch_frame_locals_address (gdbarch, ia64_frame_locals_address);
2198 /* We won't necessarily have a frame pointer and even if we do,
2199 it winds up being extraordinarly messy when attempting to find
2200 the frame chain. So for the purposes of creating frames (which
2201 is all read_fp() is used for), simply use the stack pointer value
2203 set_gdbarch_read_fp (gdbarch, generic_target_read_sp);
2204 set_gdbarch_write_fp (gdbarch, generic_target_write_sp);
2206 /* Settings that should be unnecessary. */
2207 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
2209 set_gdbarch_read_sp (gdbarch, generic_target_read_sp);
2210 set_gdbarch_write_sp (gdbarch, generic_target_write_sp);
2212 set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
2213 set_gdbarch_call_dummy_address (gdbarch, entry_point_address);
2214 set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0);
2215 set_gdbarch_call_dummy_start_offset (gdbarch, 0);
2216 set_gdbarch_pc_in_call_dummy (gdbarch, generic_pc_in_call_dummy);
2217 set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
2218 set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame);
2219 set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy);
2221 set_gdbarch_decr_pc_after_break (gdbarch, 0);
2222 set_gdbarch_function_start_offset (gdbarch, 0);
2224 set_gdbarch_remote_translate_xfer_address (
2225 gdbarch, ia64_remote_translate_xfer_address);
2231 _initialize_ia64_tdep (void)
2233 register_gdbarch_init (bfd_arch_ia64, ia64_gdbarch_init);
2235 tm_print_insn = print_insn_ia64;
2236 tm_print_insn_info.bytes_per_line = SLOT_MULTIPLIER;