1 /* Target-dependent code for the IQ2000 architecture, for GDB, the GNU
4 Copyright (C) 2000-2015 Free Software Foundation, Inc.
6 Contributed by Red Hat.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "frame-base.h"
26 #include "frame-unwind.h"
27 #include "dwarf2-frame.h"
31 #include "arch-utils.h"
38 E_R0_REGNUM, E_R1_REGNUM, E_R2_REGNUM, E_R3_REGNUM,
39 E_R4_REGNUM, E_R5_REGNUM, E_R6_REGNUM, E_R7_REGNUM,
40 E_R8_REGNUM, E_R9_REGNUM, E_R10_REGNUM, E_R11_REGNUM,
41 E_R12_REGNUM, E_R13_REGNUM, E_R14_REGNUM, E_R15_REGNUM,
42 E_R16_REGNUM, E_R17_REGNUM, E_R18_REGNUM, E_R19_REGNUM,
43 E_R20_REGNUM, E_R21_REGNUM, E_R22_REGNUM, E_R23_REGNUM,
44 E_R24_REGNUM, E_R25_REGNUM, E_R26_REGNUM, E_R27_REGNUM,
45 E_R28_REGNUM, E_R29_REGNUM, E_R30_REGNUM, E_R31_REGNUM,
47 E_LR_REGNUM = E_R31_REGNUM, /* Link register. */
48 E_SP_REGNUM = E_R29_REGNUM, /* Stack pointer. */
49 E_FP_REGNUM = E_R27_REGNUM, /* Frame pointer. */
50 E_FN_RETURN_REGNUM = E_R2_REGNUM, /* Function return value register. */
51 E_1ST_ARGREG = E_R4_REGNUM, /* 1st function arg register. */
52 E_LAST_ARGREG = E_R11_REGNUM, /* Last function arg register. */
53 E_NUM_REGS = E_PC_REGNUM + 1
56 /* Use an invalid address value as 'not available' marker. */
57 enum { REG_UNAVAIL = (CORE_ADDR) -1 };
59 struct iq2000_frame_cache
67 CORE_ADDR saved_regs [E_NUM_REGS];
70 /* Harvard methods: */
73 insn_ptr_from_addr (CORE_ADDR addr) /* CORE_ADDR to target pointer. */
75 return addr & 0x7fffffffL;
79 insn_addr_from_ptr (CORE_ADDR ptr) /* target_pointer to CORE_ADDR. */
81 return (ptr & 0x7fffffffL) | 0x80000000L;
84 /* Function: pointer_to_address
85 Convert a target pointer to an address in host (CORE_ADDR) format. */
88 iq2000_pointer_to_address (struct gdbarch *gdbarch,
89 struct type * type, const gdb_byte * buf)
91 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
92 enum type_code target = TYPE_CODE (TYPE_TARGET_TYPE (type));
94 = extract_unsigned_integer (buf, TYPE_LENGTH (type), byte_order);
96 if (target == TYPE_CODE_FUNC
97 || target == TYPE_CODE_METHOD
98 || TYPE_CODE_SPACE (TYPE_TARGET_TYPE (type)))
99 addr = insn_addr_from_ptr (addr);
104 /* Function: address_to_pointer
105 Convert a host-format address (CORE_ADDR) into a target pointer. */
108 iq2000_address_to_pointer (struct gdbarch *gdbarch,
109 struct type *type, gdb_byte *buf, CORE_ADDR addr)
111 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
112 enum type_code target = TYPE_CODE (TYPE_TARGET_TYPE (type));
114 if (target == TYPE_CODE_FUNC || target == TYPE_CODE_METHOD)
115 addr = insn_ptr_from_addr (addr);
116 store_unsigned_integer (buf, TYPE_LENGTH (type), byte_order, addr);
119 /* Real register methods: */
121 /* Function: register_name
122 Returns the name of the iq2000 register number N. */
125 iq2000_register_name (struct gdbarch *gdbarch, int regnum)
127 static const char * names[E_NUM_REGS] =
129 "r0", "r1", "r2", "r3", "r4",
130 "r5", "r6", "r7", "r8", "r9",
131 "r10", "r11", "r12", "r13", "r14",
132 "r15", "r16", "r17", "r18", "r19",
133 "r20", "r21", "r22", "r23", "r24",
134 "r25", "r26", "r27", "r28", "r29",
138 if (regnum < 0 || regnum >= E_NUM_REGS)
140 return names[regnum];
143 /* Prologue analysis methods: */
145 /* ADDIU insn (001001 rs(5) rt(5) imm(16)). */
146 #define INSN_IS_ADDIU(X) (((X) & 0xfc000000) == 0x24000000)
147 #define ADDIU_REG_SRC(X) (((X) & 0x03e00000) >> 21)
148 #define ADDIU_REG_TGT(X) (((X) & 0x001f0000) >> 16)
149 #define ADDIU_IMMEDIATE(X) ((signed short) ((X) & 0x0000ffff))
151 /* "MOVE" (OR) insn (000000 rs(5) rt(5) rd(5) 00000 100101). */
152 #define INSN_IS_MOVE(X) (((X) & 0xffe007ff) == 0x00000025)
153 #define MOVE_REG_SRC(X) (((X) & 0x001f0000) >> 16)
154 #define MOVE_REG_TGT(X) (((X) & 0x0000f800) >> 11)
156 /* STORE WORD insn (101011 rs(5) rt(5) offset(16)). */
157 #define INSN_IS_STORE_WORD(X) (((X) & 0xfc000000) == 0xac000000)
158 #define SW_REG_INDEX(X) (((X) & 0x03e00000) >> 21)
159 #define SW_REG_SRC(X) (((X) & 0x001f0000) >> 16)
160 #define SW_OFFSET(X) ((signed short) ((X) & 0x0000ffff))
162 /* Function: find_last_line_symbol
164 Given an address range, first find a line symbol corresponding to
165 the starting address. Then find the last line symbol within the
166 range that has a line number less than or equal to the first line.
168 For optimized code with code motion, this finds the last address
169 for the lowest-numbered line within the address range. */
171 static struct symtab_and_line
172 find_last_line_symbol (CORE_ADDR start, CORE_ADDR end, int notcurrent)
174 struct symtab_and_line sal = find_pc_line (start, notcurrent);
175 struct symtab_and_line best_sal = sal;
177 if (sal.pc == 0 || sal.line == 0 || sal.end == 0)
182 if (sal.line && sal.line <= best_sal.line)
184 sal = find_pc_line (sal.end, notcurrent);
186 while (sal.pc && sal.pc < end);
191 /* Function: scan_prologue
192 Decode the instructions within the given address range.
193 Decide when we must have reached the end of the function prologue.
194 If a frame_info pointer is provided, fill in its prologue information.
196 Returns the address of the first instruction after the prologue. */
199 iq2000_scan_prologue (struct gdbarch *gdbarch,
200 CORE_ADDR scan_start,
202 struct frame_info *fi,
203 struct iq2000_frame_cache *cache)
205 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
206 struct symtab_and_line sal;
209 int found_store_lr = 0;
210 int found_decr_sp = 0;
215 if (scan_end == (CORE_ADDR) 0)
217 loop_end = scan_start + 100;
218 sal.end = sal.pc = 0;
224 sal = find_last_line_symbol (scan_start, scan_end, 0);
226 sal.end = 0; /* Avoid GCC false warning. */
230 We first have to save the saved register's offset, and
231 only later do we compute its actual address. Since the
232 offset can be zero, we must first initialize all the
233 saved regs to minus one (so we can later distinguish
234 between one that's not saved, and one that's saved at zero). */
235 for (srcreg = 0; srcreg < E_NUM_REGS; srcreg ++)
236 cache->saved_regs[srcreg] = -1;
238 cache->framesize = 0;
240 for (pc = scan_start; pc < loop_end; pc += 4)
242 LONGEST insn = read_memory_unsigned_integer (pc, 4, byte_order);
243 /* Skip any instructions writing to (sp) or decrementing the
245 if ((insn & 0xffe00000) == 0xac200000)
247 /* sw using SP/%1 as base. */
248 /* LEGACY -- from assembly-only port. */
249 tgtreg = ((insn >> 16) & 0x1f);
250 if (tgtreg >= 0 && tgtreg < E_NUM_REGS)
251 cache->saved_regs[tgtreg] = -((signed short) (insn & 0xffff));
253 if (tgtreg == E_LR_REGNUM)
258 if ((insn & 0xffff8000) == 0x20218000)
260 /* addi %1, %1, -N == addi %sp, %sp, -N */
261 /* LEGACY -- from assembly-only port. */
263 cache->framesize = -((signed short) (insn & 0xffff));
267 if (INSN_IS_ADDIU (insn))
269 srcreg = ADDIU_REG_SRC (insn);
270 tgtreg = ADDIU_REG_TGT (insn);
271 offset = ADDIU_IMMEDIATE (insn);
272 if (srcreg == E_SP_REGNUM && tgtreg == E_SP_REGNUM)
273 cache->framesize = -offset;
277 if (INSN_IS_STORE_WORD (insn))
279 srcreg = SW_REG_SRC (insn);
280 tgtreg = SW_REG_INDEX (insn);
281 offset = SW_OFFSET (insn);
283 if (tgtreg == E_SP_REGNUM || tgtreg == E_FP_REGNUM)
285 /* "push" to stack (via SP or FP reg). */
286 if (cache->saved_regs[srcreg] == -1) /* Don't save twice. */
287 cache->saved_regs[srcreg] = offset;
292 if (INSN_IS_MOVE (insn))
294 srcreg = MOVE_REG_SRC (insn);
295 tgtreg = MOVE_REG_TGT (insn);
297 if (srcreg == E_SP_REGNUM && tgtreg == E_FP_REGNUM)
305 /* Unknown instruction encountered in frame. Bail out?
306 1) If we have a subsequent line symbol, we can keep going.
307 2) If not, we need to bail out and quit scanning instructions. */
309 if (fi && sal.end && (pc < sal.end)) /* Keep scanning. */
319 iq2000_init_frame_cache (struct iq2000_frame_cache *cache)
324 cache->framesize = 0;
327 for (i = 0; i < E_NUM_REGS; i++)
328 cache->saved_regs[i] = -1;
331 /* Function: iq2000_skip_prologue
332 If the input address is in a function prologue,
333 returns the address of the end of the prologue;
334 else returns the input address.
336 Note: the input address is likely to be the function start,
337 since this function is mainly used for advancing a breakpoint
338 to the first line, or stepping to the first line when we have
339 stepped into a function call. */
342 iq2000_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
344 CORE_ADDR func_addr = 0 , func_end = 0;
346 if (find_pc_partial_function (pc, NULL, & func_addr, & func_end))
348 struct symtab_and_line sal;
349 struct iq2000_frame_cache cache;
351 /* Found a function. */
352 sal = find_pc_line (func_addr, 0);
353 if (sal.end && sal.end < func_end)
354 /* Found a line number, use it as end of prologue. */
357 /* No useable line symbol. Use prologue parsing method. */
358 iq2000_init_frame_cache (&cache);
359 return iq2000_scan_prologue (gdbarch, func_addr, func_end, NULL, &cache);
362 /* No function symbol -- just return the PC. */
363 return (CORE_ADDR) pc;
366 static struct iq2000_frame_cache *
367 iq2000_frame_cache (struct frame_info *this_frame, void **this_cache)
369 struct gdbarch *gdbarch = get_frame_arch (this_frame);
370 struct iq2000_frame_cache *cache;
371 CORE_ADDR current_pc;
377 cache = FRAME_OBSTACK_ZALLOC (struct iq2000_frame_cache);
378 iq2000_init_frame_cache (cache);
381 cache->base = get_frame_register_unsigned (this_frame, E_FP_REGNUM);
383 current_pc = get_frame_pc (this_frame);
384 find_pc_partial_function (current_pc, NULL, &cache->pc, NULL);
386 iq2000_scan_prologue (gdbarch, cache->pc, current_pc, this_frame, cache);
387 if (!cache->using_fp)
388 cache->base = get_frame_register_unsigned (this_frame, E_SP_REGNUM);
390 cache->saved_sp = cache->base + cache->framesize;
392 for (i = 0; i < E_NUM_REGS; i++)
393 if (cache->saved_regs[i] != -1)
394 cache->saved_regs[i] += cache->base;
399 static struct value *
400 iq2000_frame_prev_register (struct frame_info *this_frame, void **this_cache,
403 struct iq2000_frame_cache *cache = iq2000_frame_cache (this_frame,
406 if (regnum == E_SP_REGNUM && cache->saved_sp)
407 return frame_unwind_got_constant (this_frame, regnum, cache->saved_sp);
409 if (regnum == E_PC_REGNUM)
410 regnum = E_LR_REGNUM;
412 if (regnum < E_NUM_REGS && cache->saved_regs[regnum] != -1)
413 return frame_unwind_got_memory (this_frame, regnum,
414 cache->saved_regs[regnum]);
416 return frame_unwind_got_register (this_frame, regnum, regnum);
420 iq2000_frame_this_id (struct frame_info *this_frame, void **this_cache,
421 struct frame_id *this_id)
423 struct iq2000_frame_cache *cache = iq2000_frame_cache (this_frame,
426 /* This marks the outermost frame. */
427 if (cache->base == 0)
430 *this_id = frame_id_build (cache->saved_sp, cache->pc);
433 static const struct frame_unwind iq2000_frame_unwind = {
435 default_frame_unwind_stop_reason,
436 iq2000_frame_this_id,
437 iq2000_frame_prev_register,
439 default_frame_sniffer
443 iq2000_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
445 return frame_unwind_register_unsigned (next_frame, E_SP_REGNUM);
449 iq2000_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
451 return frame_unwind_register_unsigned (next_frame, E_PC_REGNUM);
454 static struct frame_id
455 iq2000_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
457 CORE_ADDR sp = get_frame_register_unsigned (this_frame, E_SP_REGNUM);
458 return frame_id_build (sp, get_frame_pc (this_frame));
462 iq2000_frame_base_address (struct frame_info *this_frame, void **this_cache)
464 struct iq2000_frame_cache *cache = iq2000_frame_cache (this_frame,
470 static const struct frame_base iq2000_frame_base = {
471 &iq2000_frame_unwind,
472 iq2000_frame_base_address,
473 iq2000_frame_base_address,
474 iq2000_frame_base_address
477 static const unsigned char *
478 iq2000_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr,
481 static const unsigned char big_breakpoint[] = { 0x00, 0x00, 0x00, 0x0d };
482 static const unsigned char little_breakpoint[] = { 0x0d, 0x00, 0x00, 0x00 };
484 if ((*pcptr & 3) != 0)
485 error (_("breakpoint_from_pc: invalid breakpoint address 0x%lx"),
489 return (gdbarch_byte_order (gdbarch)
490 == BFD_ENDIAN_BIG) ? big_breakpoint : little_breakpoint;
493 /* Target function return value methods: */
495 /* Function: store_return_value
496 Copy the function return value from VALBUF into the
497 proper location for a function return. */
500 iq2000_store_return_value (struct type *type, struct regcache *regcache,
503 int len = TYPE_LENGTH (type);
504 int regno = E_FN_RETURN_REGNUM;
509 int size = len % 4 ?: 4;
512 memcpy (buf + 4 - size, valbuf, size);
513 regcache_raw_write (regcache, regno++, buf);
515 valbuf = ((char *) valbuf) + size;
519 /* Function: use_struct_convention
520 Returns non-zero if the given struct type will be returned using
521 a special convention, rather than the normal function return method. */
524 iq2000_use_struct_convention (struct type *type)
526 return ((TYPE_CODE (type) == TYPE_CODE_STRUCT)
527 || (TYPE_CODE (type) == TYPE_CODE_UNION))
528 && TYPE_LENGTH (type) > 8;
531 /* Function: extract_return_value
532 Copy the function's return value into VALBUF.
533 This function is called only in the context of "target function calls",
534 ie. when the debugger forces a function to be called in the child, and
535 when the debugger forces a function to return prematurely via the
539 iq2000_extract_return_value (struct type *type, struct regcache *regcache,
542 struct gdbarch *gdbarch = get_regcache_arch (regcache);
543 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
545 /* If the function's return value is 8 bytes or less, it is
546 returned in a register, and if larger than 8 bytes, it is
547 returned in a stack location which is pointed to by the same
549 int len = TYPE_LENGTH (type);
553 int regno = E_FN_RETURN_REGNUM;
555 /* Return values of <= 8 bytes are returned in
560 int size = len % 4 ?: 4;
562 /* By using store_unsigned_integer we avoid having to
563 do anything special for small big-endian values. */
564 regcache_cooked_read_unsigned (regcache, regno++, &tmp);
565 store_unsigned_integer (valbuf, size, byte_order, tmp);
567 valbuf = ((char *) valbuf) + size;
572 /* Return values > 8 bytes are returned in memory,
573 pointed to by FN_RETURN_REGNUM. */
574 ULONGEST return_buffer;
575 regcache_cooked_read_unsigned (regcache, E_FN_RETURN_REGNUM,
577 read_memory (return_buffer, valbuf, TYPE_LENGTH (type));
581 static enum return_value_convention
582 iq2000_return_value (struct gdbarch *gdbarch, struct value *function,
583 struct type *type, struct regcache *regcache,
584 gdb_byte *readbuf, const gdb_byte *writebuf)
586 if (iq2000_use_struct_convention (type))
587 return RETURN_VALUE_STRUCT_CONVENTION;
589 iq2000_store_return_value (type, regcache, writebuf);
591 iq2000_extract_return_value (type, regcache, readbuf);
592 return RETURN_VALUE_REGISTER_CONVENTION;
595 /* Function: register_virtual_type
596 Returns the default type for register N. */
599 iq2000_register_type (struct gdbarch *gdbarch, int regnum)
601 return builtin_type (gdbarch)->builtin_int32;
605 iq2000_frame_align (struct gdbarch *ignore, CORE_ADDR sp)
607 /* This is the same frame alignment used by gcc. */
608 return ((sp + 7) & ~7);
611 /* Convenience function to check 8-byte types for being a scalar type
612 or a struct with only one long long or double member. */
614 iq2000_pass_8bytetype_by_address (struct type *type)
619 while (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
620 type = TYPE_TARGET_TYPE (type);
621 /* Non-struct and non-union types are always passed by value. */
622 if (TYPE_CODE (type) != TYPE_CODE_STRUCT
623 && TYPE_CODE (type) != TYPE_CODE_UNION)
625 /* Structs with more than 1 field are always passed by address. */
626 if (TYPE_NFIELDS (type) != 1)
628 /* Get field type. */
629 ftype = (TYPE_FIELDS (type))[0].type;
630 /* The field type must have size 8, otherwise pass by address. */
631 if (TYPE_LENGTH (ftype) != 8)
633 /* Skip typedefs of field type. */
634 while (TYPE_CODE (ftype) == TYPE_CODE_TYPEDEF)
635 ftype = TYPE_TARGET_TYPE (ftype);
636 /* If field is int or float, pass by value. */
637 if (TYPE_CODE (ftype) == TYPE_CODE_FLT
638 || TYPE_CODE (ftype) == TYPE_CODE_INT)
640 /* Everything else, pass by address. */
645 iq2000_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
646 struct regcache *regcache, CORE_ADDR bp_addr,
647 int nargs, struct value **args, CORE_ADDR sp,
648 int struct_return, CORE_ADDR struct_addr)
650 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
654 int i, argreg, typelen, slacklen;
656 /* Used to copy struct arguments into the stack. */
657 CORE_ADDR struct_ptr;
659 /* First determine how much stack space we will need. */
660 for (i = 0, argreg = E_1ST_ARGREG + (struct_return != 0); i < nargs; i++)
662 type = value_type (args[i]);
663 typelen = TYPE_LENGTH (type);
666 /* Scalars of up to 4 bytes,
667 structs of up to 4 bytes, and
669 if (argreg <= E_LAST_ARGREG)
674 else if (typelen == 8 && !iq2000_pass_8bytetype_by_address (type))
678 structs with a single field of long long or double. */
679 if (argreg <= E_LAST_ARGREG - 1)
681 /* 8-byte arg goes into a register pair
682 (must start with an even-numbered reg). */
683 if (((argreg - E_1ST_ARGREG) % 2) != 0)
689 argreg = E_LAST_ARGREG + 1; /* no more argregs. */
690 /* 8-byte arg goes on stack, must be 8-byte aligned. */
691 stackspace = ((stackspace + 7) & ~7);
697 /* Structs are passed as pointer to a copy of the struct.
698 So we need room on the stack for a copy of the struct
699 plus for the argument pointer. */
700 if (argreg <= E_LAST_ARGREG)
704 /* Care for 8-byte alignment of structs saved on stack. */
705 stackspace += ((typelen + 7) & ~7);
709 /* Now copy params, in ascending order, into their assigned location
710 (either in a register or on the stack). */
712 sp -= (sp % 8); /* align */
715 sp -= (sp % 8); /* align again */
718 argreg = E_1ST_ARGREG;
721 /* A function that returns a struct will consume one argreg to do so.
723 regcache_cooked_write_unsigned (regcache, argreg++, struct_addr);
726 for (i = 0; i < nargs; i++)
728 type = value_type (args[i]);
729 typelen = TYPE_LENGTH (type);
730 val = value_contents (args[i]);
733 /* Char, short, int, float, pointer, and structs <= four bytes. */
734 slacklen = (4 - (typelen % 4)) % 4;
735 memset (buf, 0, sizeof (buf));
736 memcpy (buf + slacklen, val, typelen);
737 if (argreg <= E_LAST_ARGREG)
739 /* Passed in a register. */
740 regcache_raw_write (regcache, argreg++, buf);
744 /* Passed on the stack. */
745 write_memory (sp + stackspace, buf, 4);
749 else if (typelen == 8 && !iq2000_pass_8bytetype_by_address (type))
751 /* (long long), (double), or struct consisting of
752 a single (long long) or (double). */
753 if (argreg <= E_LAST_ARGREG - 1)
755 /* 8-byte arg goes into a register pair
756 (must start with an even-numbered reg). */
757 if (((argreg - E_1ST_ARGREG) % 2) != 0)
759 regcache_raw_write (regcache, argreg++, val);
760 regcache_raw_write (regcache, argreg++, val + 4);
764 /* 8-byte arg goes on stack, must be 8-byte aligned. */
765 argreg = E_LAST_ARGREG + 1; /* no more argregs. */
766 stackspace = ((stackspace + 7) & ~7);
767 write_memory (sp + stackspace, val, typelen);
773 /* Store struct beginning at the upper end of the previously
774 computed stack space. Then store the address of the struct
775 using the usual rules for a 4 byte value. */
776 struct_ptr -= ((typelen + 7) & ~7);
777 write_memory (struct_ptr, val, typelen);
778 if (argreg <= E_LAST_ARGREG)
779 regcache_cooked_write_unsigned (regcache, argreg++, struct_ptr);
782 store_unsigned_integer (buf, 4, byte_order, struct_ptr);
783 write_memory (sp + stackspace, buf, 4);
789 /* Store return address. */
790 regcache_cooked_write_unsigned (regcache, E_LR_REGNUM, bp_addr);
792 /* Update stack pointer. */
793 regcache_cooked_write_unsigned (regcache, E_SP_REGNUM, sp);
795 /* And that should do it. Return the new stack pointer. */
799 /* Function: gdbarch_init
800 Initializer function for the iq2000 gdbarch vector.
801 Called by gdbarch. Sets up the gdbarch vector(s) for this target. */
803 static struct gdbarch *
804 iq2000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
806 struct gdbarch *gdbarch;
808 /* Look up list for candidates - only one. */
809 arches = gdbarch_list_lookup_by_info (arches, &info);
811 return arches->gdbarch;
813 gdbarch = gdbarch_alloc (&info, NULL);
815 set_gdbarch_num_regs (gdbarch, E_NUM_REGS);
816 set_gdbarch_num_pseudo_regs (gdbarch, 0);
817 set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM);
818 set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM);
819 set_gdbarch_register_name (gdbarch, iq2000_register_name);
820 set_gdbarch_address_to_pointer (gdbarch, iq2000_address_to_pointer);
821 set_gdbarch_pointer_to_address (gdbarch, iq2000_pointer_to_address);
822 set_gdbarch_ptr_bit (gdbarch, 4 * TARGET_CHAR_BIT);
823 set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT);
824 set_gdbarch_int_bit (gdbarch, 4 * TARGET_CHAR_BIT);
825 set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT);
826 set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT);
827 set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT);
828 set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
829 set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
830 set_gdbarch_float_format (gdbarch, floatformats_ieee_single);
831 set_gdbarch_double_format (gdbarch, floatformats_ieee_double);
832 set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);
833 set_gdbarch_return_value (gdbarch, iq2000_return_value);
834 set_gdbarch_breakpoint_from_pc (gdbarch, iq2000_breakpoint_from_pc);
835 set_gdbarch_frame_args_skip (gdbarch, 0);
836 set_gdbarch_skip_prologue (gdbarch, iq2000_skip_prologue);
837 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
838 set_gdbarch_print_insn (gdbarch, print_insn_iq2000);
839 set_gdbarch_register_type (gdbarch, iq2000_register_type);
840 set_gdbarch_frame_align (gdbarch, iq2000_frame_align);
841 set_gdbarch_unwind_sp (gdbarch, iq2000_unwind_sp);
842 set_gdbarch_unwind_pc (gdbarch, iq2000_unwind_pc);
843 set_gdbarch_dummy_id (gdbarch, iq2000_dummy_id);
844 frame_base_set_default (gdbarch, &iq2000_frame_base);
845 set_gdbarch_push_dummy_call (gdbarch, iq2000_push_dummy_call);
847 gdbarch_init_osabi (info, gdbarch);
849 dwarf2_append_unwinders (gdbarch);
850 frame_unwind_append_unwinder (gdbarch, &iq2000_frame_unwind);
855 /* Function: _initialize_iq2000_tdep
856 Initializer function for the iq2000 module.
857 Called by gdb at start-up. */
859 /* Provide a prototype to silence -Wmissing-prototypes. */
860 extern initialize_file_ftype _initialize_iq2000_tdep;
863 _initialize_iq2000_tdep (void)
865 register_gdbarch_init (bfd_arch_iq2000, iq2000_gdbarch_init);