1 /* Target-dependent code for Moxie.
3 Copyright (C) 2009-2014 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 3 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, see <http://www.gnu.org/licenses/>. */
22 #include "frame-unwind.h"
23 #include "frame-base.h"
34 #include "arch-utils.h"
36 #include "trad-frame.h"
39 #include "record-full.h"
41 #include "moxie-tdep.h"
43 /* Local functions. */
45 extern void _initialize_moxie_tdep (void);
47 /* Use an invalid address value as 'not available' marker. */
48 enum { REG_UNAVAIL = (CORE_ADDR) -1 };
50 struct moxie_frame_cache
56 CORE_ADDR saved_regs[MOXIE_NUM_REGS];
60 /* Implement the "frame_align" gdbarch method. */
63 moxie_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp)
65 /* Align to the size of an instruction (so that they can safely be
66 pushed onto the stack. */
70 /* Implement the "breakpoint_from_pc" gdbarch method. */
72 static const unsigned char *
73 moxie_breakpoint_from_pc (struct gdbarch *gdbarch,
74 CORE_ADDR *pcptr, int *lenptr)
76 static unsigned char breakpoint[] = { 0x35, 0x00 };
78 *lenptr = sizeof (breakpoint);
82 /* Moxie register names. */
84 char *moxie_register_names[] = {
85 "$fp", "$sp", "$r0", "$r1", "$r2",
86 "$r3", "$r4", "$r5", "$r6", "$r7",
87 "$r8", "$r9", "$r10", "$r11", "$r12",
88 "$r13", "$pc", "$cc" };
90 /* Implement the "register_name" gdbarch method. */
93 moxie_register_name (struct gdbarch *gdbarch, int reg_nr)
97 if (reg_nr >= MOXIE_NUM_REGS)
99 return moxie_register_names[reg_nr];
102 /* Implement the "register_type" gdbarch method. */
105 moxie_register_type (struct gdbarch *gdbarch, int reg_nr)
107 if (reg_nr == MOXIE_PC_REGNUM)
108 return builtin_type (gdbarch)->builtin_func_ptr;
109 else if (reg_nr == MOXIE_SP_REGNUM || reg_nr == MOXIE_FP_REGNUM)
110 return builtin_type (gdbarch)->builtin_data_ptr;
112 return builtin_type (gdbarch)->builtin_int32;
115 /* Write into appropriate registers a function return value
116 of type TYPE, given in virtual format. */
119 moxie_store_return_value (struct type *type, struct regcache *regcache,
122 struct gdbarch *gdbarch = get_regcache_arch (regcache);
123 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
125 int len = TYPE_LENGTH (type);
127 /* Things always get returned in RET1_REGNUM, RET2_REGNUM. */
128 regval = extract_unsigned_integer (valbuf, len > 4 ? 4 : len, byte_order);
129 regcache_cooked_write_unsigned (regcache, RET1_REGNUM, regval);
132 regval = extract_unsigned_integer ((gdb_byte *) valbuf + 4,
133 len - 4, byte_order);
134 regcache_cooked_write_unsigned (regcache, RET1_REGNUM + 1, regval);
138 /* Decode the instructions within the given address range. Decide
139 when we must have reached the end of the function prologue. If a
140 frame_info pointer is provided, fill in its saved_regs etc.
142 Returns the address of the first instruction after the prologue. */
145 moxie_analyze_prologue (CORE_ADDR start_addr, CORE_ADDR end_addr,
146 struct moxie_frame_cache *cache,
147 struct gdbarch *gdbarch)
149 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
151 ULONGEST inst, inst2;
155 /* Record where the jsra instruction saves the PC and FP. */
156 cache->saved_regs[MOXIE_PC_REGNUM] = -4;
157 cache->saved_regs[MOXIE_FP_REGNUM] = 0;
158 cache->framesize = 0;
160 if (start_addr >= end_addr)
163 for (next_addr = start_addr; next_addr < end_addr; )
165 inst = read_memory_unsigned_integer (next_addr, 2, byte_order);
167 /* Match "push $sp $rN" where N is between 0 and 13 inclusive. */
168 if (inst >= 0x0612 && inst <= 0x061f)
170 regnum = inst & 0x000f;
171 cache->framesize += 4;
172 cache->saved_regs[regnum] = cache->framesize;
179 inst = read_memory_unsigned_integer (next_addr, 2, byte_order);
181 /* Optional stack allocation for args and local vars <= 4
183 if (inst == 0x01e0) /* ldi.l $r12, X */
185 offset = read_memory_integer (next_addr + 2, 4, byte_order);
186 inst2 = read_memory_unsigned_integer (next_addr + 6, 2, byte_order);
188 if (inst2 == 0x291e) /* sub.l $sp, $r12 */
190 cache->framesize += offset;
193 return (next_addr + 8);
195 else if ((inst & 0xff00) == 0x9100) /* dec $sp, X */
197 cache->framesize += (inst & 0x00ff);
200 while (next_addr < end_addr)
202 inst = read_memory_unsigned_integer (next_addr, 2, byte_order);
203 if ((inst & 0xff00) != 0x9100) /* no more dec $sp, X */
205 cache->framesize += (inst & 0x00ff);
213 /* Find the end of function prologue. */
216 moxie_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
218 CORE_ADDR func_addr = 0, func_end = 0;
219 const char *func_name;
221 /* See if we can determine the end of the prologue via the symbol table.
222 If so, then return either PC, or the PC after the prologue, whichever
224 if (find_pc_partial_function (pc, &func_name, &func_addr, &func_end))
226 CORE_ADDR post_prologue_pc
227 = skip_prologue_using_sal (gdbarch, func_addr);
228 if (post_prologue_pc != 0)
229 return max (pc, post_prologue_pc);
232 /* Can't determine prologue from the symbol table, need to examine
234 struct symtab_and_line sal;
236 struct moxie_frame_cache cache;
239 memset (&cache, 0, sizeof cache);
241 plg_end = moxie_analyze_prologue (func_addr,
242 func_end, &cache, gdbarch);
243 /* Found a function. */
244 sym = lookup_symbol (func_name, NULL, VAR_DOMAIN, NULL);
245 /* Don't use line number debug info for assembly source
247 if (sym && SYMBOL_LANGUAGE (sym) != language_asm)
249 sal = find_pc_line (func_addr, 0);
250 if (sal.end && sal.end < func_end)
252 /* Found a line number, use it as end of
257 /* No useable line symbol. Use result of prologue parsing
263 /* No function symbol -- just return the PC. */
264 return (CORE_ADDR) pc;
267 struct moxie_unwind_cache
269 /* The previous frame's inner most stack address. Used as this
270 frame ID's stack_addr. */
272 /* The frame's base, optionally used by the high-level debug info. */
275 /* How far the SP and r13 (FP) have been offset from the start of
276 the stack frame (as defined by the previous frame's stack
281 /* Table indicating the location of each and every register. */
282 struct trad_frame_saved_reg *saved_regs;
285 /* Read an unsigned integer from the inferior, and adjust
288 moxie_process_readu (CORE_ADDR addr, gdb_byte *buf,
289 int length, enum bfd_endian byte_order)
291 if (target_read_memory (addr, buf, length))
294 printf_unfiltered (_("Process record: error reading memory at "
295 "addr 0x%s len = %d.\n"),
296 paddress (target_gdbarch (), addr), length);
300 return extract_unsigned_integer (buf, length, byte_order);
304 /* Helper macro to extract the signed 10-bit offset from a 16-bit
305 branch instruction. */
306 #define INST2OFFSET(o) ((((signed short)((o & ((1<<10)-1))<<6))>>6)<<1)
308 /* Insert a single step breakpoint. */
311 moxie_software_single_step (struct frame_info *frame)
313 struct gdbarch *gdbarch = get_frame_arch (frame);
314 struct address_space *aspace = get_frame_address_space (frame);
320 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
321 struct regcache *regcache = get_current_regcache ();
323 addr = get_frame_pc (frame);
325 inst = (uint16_t) moxie_process_readu (addr, buf, 2, byte_order);
327 /* Decode instruction. */
328 if (inst & (1 << 15))
330 if (inst & (1 << 14))
332 /* This is a Form 3 instruction. */
333 int opcode = (inst >> 10 & 0xf);
341 case 0x04: /* bltu */
342 case 0x05: /* bgtu */
345 case 0x08: /* bgeu */
346 case 0x09: /* bleu */
347 /* Insert breaks on both branches, because we can't currently tell
348 which way things will go. */
349 insert_single_step_breakpoint (gdbarch, aspace, addr + 2);
350 insert_single_step_breakpoint (gdbarch, aspace, addr + 2 + INST2OFFSET(inst));
361 /* This is a Form 2 instruction. They are all 16 bits. */
362 insert_single_step_breakpoint (gdbarch, aspace, addr + 2);
367 /* This is a Form 1 instruction. */
368 int opcode = inst >> 8;
372 /* 16-bit instructions. */
374 case 0x02: /* mov (register-to-register) */
375 case 0x05: /* add.l */
376 case 0x06: /* push */
378 case 0x0a: /* ld.l (register indirect) */
379 case 0x0b: /* st.l */
391 case 0x1c: /* ld.b (register indirect) */
392 case 0x1e: /* st.b */
393 case 0x21: /* ld.s (register indirect) */
394 case 0x23: /* st.s */
396 case 0x27: /* lshr */
397 case 0x28: /* ashl */
398 case 0x29: /* sub.l */
402 case 0x2d: /* ashr */
404 case 0x2f: /* mul.l */
405 case 0x31: /* div.l */
406 case 0x32: /* udiv.l */
407 case 0x33: /* mod.l */
408 case 0x34: /* umod.l */
409 insert_single_step_breakpoint (gdbarch, aspace, addr + 2);
412 /* 48-bit instructions. */
413 case 0x01: /* ldi.l (immediate) */
414 case 0x08: /* lda.l */
415 case 0x09: /* sta.l */
416 case 0x0c: /* ldo.l */
417 case 0x0d: /* sto.l */
418 case 0x1b: /* ldi.b (immediate) */
419 case 0x1d: /* lda.b */
420 case 0x1f: /* sta.b */
421 case 0x20: /* ldi.s (immediate) */
422 case 0x22: /* lda.s */
423 case 0x24: /* sta.s */
424 case 0x36: /* ldo.b */
425 case 0x37: /* sto.b */
426 case 0x38: /* ldo.s */
427 case 0x39: /* sto.s */
428 insert_single_step_breakpoint (gdbarch, aspace, addr + 6);
431 /* Control flow instructions. */
432 case 0x03: /* jsra */
433 case 0x1a: /* jmpa */
434 insert_single_step_breakpoint (gdbarch, aspace,
435 moxie_process_readu (addr + 2,
441 regcache_cooked_read_unsigned (regcache, MOXIE_FP_REGNUM, &fp);
442 insert_single_step_breakpoint (gdbarch, aspace,
443 moxie_process_readu (fp + 4,
450 regcache_raw_read (regcache,
451 (inst >> 4) & 0xf, (gdb_byte *) & tmpu32);
452 insert_single_step_breakpoint (gdbarch, aspace,
458 /* Unsupported, for now. */
466 /* Implement the "read_pc" gdbarch method. */
469 moxie_read_pc (struct regcache *regcache)
473 regcache_cooked_read_unsigned (regcache, MOXIE_PC_REGNUM, &pc);
477 /* Implement the "write_pc" gdbarch method. */
480 moxie_write_pc (struct regcache *regcache, CORE_ADDR val)
482 regcache_cooked_write_unsigned (regcache, MOXIE_PC_REGNUM, val);
485 /* Implement the "unwind_sp" gdbarch method. */
488 moxie_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
490 return frame_unwind_register_unsigned (next_frame, MOXIE_SP_REGNUM);
493 /* Given a return value in `regbuf' with a type `valtype',
494 extract and copy its value into `valbuf'. */
497 moxie_extract_return_value (struct type *type, struct regcache *regcache,
500 struct gdbarch *gdbarch = get_regcache_arch (regcache);
501 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
502 bfd_byte *valbuf = dst;
503 int len = TYPE_LENGTH (type);
506 /* By using store_unsigned_integer we avoid having to do
507 anything special for small big-endian values. */
508 regcache_cooked_read_unsigned (regcache, RET1_REGNUM, &tmp);
509 store_unsigned_integer (valbuf, (len > 4 ? len - 4 : len), byte_order, tmp);
511 /* Ignore return values more than 8 bytes in size because the moxie
512 returns anything more than 8 bytes in the stack. */
515 regcache_cooked_read_unsigned (regcache, RET1_REGNUM + 1, &tmp);
516 store_unsigned_integer (valbuf + len - 4, 4, byte_order, tmp);
520 /* Implement the "return_value" gdbarch method. */
522 static enum return_value_convention
523 moxie_return_value (struct gdbarch *gdbarch, struct value *function,
524 struct type *valtype, struct regcache *regcache,
525 gdb_byte *readbuf, const gdb_byte *writebuf)
527 if (TYPE_LENGTH (valtype) > 8)
528 return RETURN_VALUE_STRUCT_CONVENTION;
532 moxie_extract_return_value (valtype, regcache, readbuf);
533 if (writebuf != NULL)
534 moxie_store_return_value (valtype, regcache, writebuf);
535 return RETURN_VALUE_REGISTER_CONVENTION;
539 /* Allocate and initialize a moxie_frame_cache object. */
541 static struct moxie_frame_cache *
542 moxie_alloc_frame_cache (void)
544 struct moxie_frame_cache *cache;
547 cache = FRAME_OBSTACK_ZALLOC (struct moxie_frame_cache);
552 cache->framesize = 0;
553 for (i = 0; i < MOXIE_NUM_REGS; ++i)
554 cache->saved_regs[i] = REG_UNAVAIL;
559 /* Populate a moxie_frame_cache object for this_frame. */
561 static struct moxie_frame_cache *
562 moxie_frame_cache (struct frame_info *this_frame, void **this_cache)
564 struct moxie_frame_cache *cache;
565 CORE_ADDR current_pc;
571 cache = moxie_alloc_frame_cache ();
574 cache->base = get_frame_register_unsigned (this_frame, MOXIE_FP_REGNUM);
575 if (cache->base == 0)
578 cache->pc = get_frame_func (this_frame);
579 current_pc = get_frame_pc (this_frame);
582 struct gdbarch *gdbarch = get_frame_arch (this_frame);
583 moxie_analyze_prologue (cache->pc, current_pc, cache, gdbarch);
586 cache->saved_sp = cache->base - cache->framesize;
588 for (i = 0; i < MOXIE_NUM_REGS; ++i)
589 if (cache->saved_regs[i] != REG_UNAVAIL)
590 cache->saved_regs[i] = cache->base - cache->saved_regs[i];
595 /* Implement the "unwind_pc" gdbarch method. */
598 moxie_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
600 return frame_unwind_register_unsigned (next_frame, MOXIE_PC_REGNUM);
603 /* Given a GDB frame, determine the address of the calling function's
604 frame. This will be used to create a new GDB frame struct. */
607 moxie_frame_this_id (struct frame_info *this_frame,
608 void **this_prologue_cache, struct frame_id *this_id)
610 struct moxie_frame_cache *cache = moxie_frame_cache (this_frame,
611 this_prologue_cache);
613 /* This marks the outermost frame. */
614 if (cache->base == 0)
617 *this_id = frame_id_build (cache->saved_sp, cache->pc);
620 /* Get the value of register regnum in the previous stack frame. */
622 static struct value *
623 moxie_frame_prev_register (struct frame_info *this_frame,
624 void **this_prologue_cache, int regnum)
626 struct moxie_frame_cache *cache = moxie_frame_cache (this_frame,
627 this_prologue_cache);
629 gdb_assert (regnum >= 0);
631 if (regnum == MOXIE_SP_REGNUM && cache->saved_sp)
632 return frame_unwind_got_constant (this_frame, regnum, cache->saved_sp);
634 if (regnum < MOXIE_NUM_REGS && cache->saved_regs[regnum] != REG_UNAVAIL)
635 return frame_unwind_got_memory (this_frame, regnum,
636 cache->saved_regs[regnum]);
638 return frame_unwind_got_register (this_frame, regnum, regnum);
641 static const struct frame_unwind moxie_frame_unwind = {
643 default_frame_unwind_stop_reason,
645 moxie_frame_prev_register,
647 default_frame_sniffer
650 /* Return the base address of this_frame. */
653 moxie_frame_base_address (struct frame_info *this_frame, void **this_cache)
655 struct moxie_frame_cache *cache = moxie_frame_cache (this_frame,
661 static const struct frame_base moxie_frame_base = {
663 moxie_frame_base_address,
664 moxie_frame_base_address,
665 moxie_frame_base_address
668 static struct frame_id
669 moxie_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
671 CORE_ADDR sp = get_frame_register_unsigned (this_frame, MOXIE_SP_REGNUM);
673 return frame_id_build (sp, get_frame_pc (this_frame));
676 /* Parse the current instruction and record the values of the registers and
677 memory that will be changed in current instruction to "record_arch_list".
678 Return -1 if something wrong. */
681 moxie_process_record (struct gdbarch *gdbarch, struct regcache *regcache,
687 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
689 if (record_debug > 1)
690 fprintf_unfiltered (gdb_stdlog, "Process record: moxie_process_record "
692 paddress (target_gdbarch (), addr));
694 inst = (uint16_t) moxie_process_readu (addr, buf, 2, byte_order);
696 /* Decode instruction. */
697 if (inst & (1 << 15))
699 if (inst & (1 << 14))
701 /* This is a Form 3 instruction. */
702 int opcode = (inst >> 10 & 0xf);
710 case 0x04: /* bltu */
711 case 0x05: /* bgtu */
714 case 0x08: /* bgeu */
715 case 0x09: /* bleu */
727 /* This is a Form 2 instruction. */
728 int opcode = (inst >> 12 & 0x3);
735 int reg = (inst >> 8) & 0xf;
736 if (record_full_arch_list_add_reg (regcache, reg))
742 /* Do nothing until GDB learns about moxie's special
754 /* This is a Form 1 instruction. */
755 int opcode = inst >> 8;
762 case 0x01: /* ldi.l (immediate) */
763 case 0x02: /* mov (register-to-register) */
765 int reg = (inst >> 4) & 0xf;
766 if (record_full_arch_list_add_reg (regcache, reg))
770 case 0x03: /* jsra */
772 regcache_raw_read (regcache,
773 MOXIE_SP_REGNUM, (gdb_byte *) & tmpu32);
774 tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
776 if (record_full_arch_list_add_reg (regcache, MOXIE_FP_REGNUM)
777 || (record_full_arch_list_add_reg (regcache,
779 || record_full_arch_list_add_mem (tmpu32 - 12, 12))
785 if (record_full_arch_list_add_reg (regcache, MOXIE_FP_REGNUM)
786 || (record_full_arch_list_add_reg (regcache,
791 case 0x05: /* add.l */
793 int reg = (inst >> 4) & 0xf;
794 if (record_full_arch_list_add_reg (regcache, reg))
798 case 0x06: /* push */
800 int reg = (inst >> 4) & 0xf;
801 regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32);
802 tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
804 if (record_full_arch_list_add_reg (regcache, reg)
805 || record_full_arch_list_add_mem (tmpu32 - 4, 4))
811 int a = (inst >> 4) & 0xf;
813 if (record_full_arch_list_add_reg (regcache, a)
814 || record_full_arch_list_add_reg (regcache, b))
818 case 0x08: /* lda.l */
820 int reg = (inst >> 4) & 0xf;
821 if (record_full_arch_list_add_reg (regcache, reg))
825 case 0x09: /* sta.l */
827 tmpu32 = (uint32_t) moxie_process_readu (addr+2, buf,
829 if (record_full_arch_list_add_mem (tmpu32, 4))
833 case 0x0a: /* ld.l (register indirect) */
835 int reg = (inst >> 4) & 0xf;
836 if (record_full_arch_list_add_reg (regcache, reg))
840 case 0x0b: /* st.l */
842 int reg = (inst >> 4) & 0xf;
843 regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32);
844 tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
846 if (record_full_arch_list_add_mem (tmpu32, 4))
850 case 0x0c: /* ldo.l */
852 int reg = (inst >> 4) & 0xf;
853 if (record_full_arch_list_add_reg (regcache, reg))
857 case 0x0d: /* sto.l */
859 int reg = (inst >> 4) & 0xf;
860 uint32_t offset = (uint32_t) moxie_process_readu (addr+2, buf, 4,
862 regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32);
863 tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
866 if (record_full_arch_list_add_mem (tmpu32, 4))
872 if (record_full_arch_list_add_reg (regcache, MOXIE_CC_REGNUM))
892 regcache_raw_read (regcache,
893 MOXIE_SP_REGNUM, (gdb_byte *) & tmpu32);
894 tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
896 if (record_full_arch_list_add_reg (regcache, MOXIE_FP_REGNUM)
897 || (record_full_arch_list_add_reg (regcache,
899 || record_full_arch_list_add_mem (tmpu32 - 12, 12))
903 case 0x1a: /* jmpa */
908 case 0x1b: /* ldi.b (immediate) */
909 case 0x1c: /* ld.b (register indirect) */
910 case 0x1d: /* lda.b */
912 int reg = (inst >> 4) & 0xf;
913 if (record_full_arch_list_add_reg (regcache, reg))
917 case 0x1e: /* st.b */
919 int reg = (inst >> 4) & 0xf;
920 regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32);
921 tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
923 if (record_full_arch_list_add_mem (tmpu32, 1))
927 case 0x1f: /* sta.b */
929 tmpu32 = moxie_process_readu (addr+2, buf, 4, byte_order);
930 if (record_full_arch_list_add_mem (tmpu32, 1))
934 case 0x20: /* ldi.s (immediate) */
935 case 0x21: /* ld.s (register indirect) */
936 case 0x22: /* lda.s */
938 int reg = (inst >> 4) & 0xf;
939 if (record_full_arch_list_add_reg (regcache, reg))
943 case 0x23: /* st.s */
945 int reg = (inst >> 4) & 0xf;
946 regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32);
947 tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
949 if (record_full_arch_list_add_mem (tmpu32, 2))
953 case 0x24: /* sta.s */
955 tmpu32 = moxie_process_readu (addr+2, buf, 4, byte_order);
956 if (record_full_arch_list_add_mem (tmpu32, 2))
966 case 0x27: /* lshr */
967 case 0x28: /* ashl */
968 case 0x29: /* sub.l */
972 case 0x2d: /* ashr */
974 case 0x2f: /* mul.l */
976 int reg = (inst >> 4) & 0xf;
977 if (record_full_arch_list_add_reg (regcache, reg))
983 /* We currently implement support for libgloss'
986 int inum = moxie_process_readu (addr+2, buf, 4, byte_order);
990 case 0x1: /* SYS_exit */
995 case 0x2: /* SYS_open */
997 if (record_full_arch_list_add_reg (regcache, RET1_REGNUM))
1001 case 0x4: /* SYS_read */
1003 uint32_t length, ptr;
1005 /* Read buffer pointer is in $r1. */
1006 regcache_raw_read (regcache, 3, (gdb_byte *) & ptr);
1007 ptr = extract_unsigned_integer ((gdb_byte *) & ptr,
1010 /* String length is at 0x12($fp). */
1011 regcache_raw_read (regcache,
1012 MOXIE_FP_REGNUM, (gdb_byte *) & tmpu32);
1013 tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
1015 length = moxie_process_readu (tmpu32+20, buf, 4, byte_order);
1017 if (record_full_arch_list_add_mem (ptr, length))
1021 case 0x5: /* SYS_write */
1023 if (record_full_arch_list_add_reg (regcache, RET1_REGNUM))
1032 case 0x31: /* div.l */
1033 case 0x32: /* udiv.l */
1034 case 0x33: /* mod.l */
1035 case 0x34: /* umod.l */
1037 int reg = (inst >> 4) & 0xf;
1038 if (record_full_arch_list_add_reg (regcache, reg))
1042 case 0x35: /* brk */
1045 case 0x36: /* ldo.b */
1047 int reg = (inst >> 4) & 0xf;
1048 if (record_full_arch_list_add_reg (regcache, reg))
1052 case 0x37: /* sto.b */
1054 int reg = (inst >> 4) & 0xf;
1055 uint32_t offset = (uint32_t) moxie_process_readu (addr+2, buf, 4,
1057 regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32);
1058 tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
1061 if (record_full_arch_list_add_mem (tmpu32, 1))
1065 case 0x38: /* ldo.s */
1067 int reg = (inst >> 4) & 0xf;
1068 if (record_full_arch_list_add_reg (regcache, reg))
1072 case 0x39: /* sto.s */
1074 int reg = (inst >> 4) & 0xf;
1075 uint32_t offset = (uint32_t) moxie_process_readu (addr+2, buf, 4,
1077 regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32);
1078 tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
1081 if (record_full_arch_list_add_mem (tmpu32, 2))
1091 if (record_full_arch_list_add_reg (regcache, MOXIE_PC_REGNUM))
1093 if (record_full_arch_list_add_end ())
1098 /* Allocate and initialize the moxie gdbarch object. */
1100 static struct gdbarch *
1101 moxie_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
1103 struct gdbarch *gdbarch;
1104 struct gdbarch_tdep *tdep;
1106 /* If there is already a candidate, use it. */
1107 arches = gdbarch_list_lookup_by_info (arches, &info);
1109 return arches->gdbarch;
1111 /* Allocate space for the new architecture. */
1112 tdep = XNEW (struct gdbarch_tdep);
1113 gdbarch = gdbarch_alloc (&info, tdep);
1115 set_gdbarch_read_pc (gdbarch, moxie_read_pc);
1116 set_gdbarch_write_pc (gdbarch, moxie_write_pc);
1117 set_gdbarch_unwind_sp (gdbarch, moxie_unwind_sp);
1119 set_gdbarch_num_regs (gdbarch, MOXIE_NUM_REGS);
1120 set_gdbarch_sp_regnum (gdbarch, MOXIE_SP_REGNUM);
1121 set_gdbarch_pc_regnum (gdbarch, MOXIE_PC_REGNUM);
1122 set_gdbarch_register_name (gdbarch, moxie_register_name);
1123 set_gdbarch_register_type (gdbarch, moxie_register_type);
1125 set_gdbarch_return_value (gdbarch, moxie_return_value);
1127 set_gdbarch_skip_prologue (gdbarch, moxie_skip_prologue);
1128 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
1129 set_gdbarch_breakpoint_from_pc (gdbarch, moxie_breakpoint_from_pc);
1130 set_gdbarch_frame_align (gdbarch, moxie_frame_align);
1132 frame_base_set_default (gdbarch, &moxie_frame_base);
1134 /* Methods for saving / extracting a dummy frame's ID. The ID's
1135 stack address must match the SP value returned by
1136 PUSH_DUMMY_CALL, and saved by generic_save_dummy_frame_tos. */
1137 set_gdbarch_dummy_id (gdbarch, moxie_dummy_id);
1139 set_gdbarch_unwind_pc (gdbarch, moxie_unwind_pc);
1141 set_gdbarch_print_insn (gdbarch, print_insn_moxie);
1143 /* Hook in ABI-specific overrides, if they have been registered. */
1144 gdbarch_init_osabi (info, gdbarch);
1146 /* Hook in the default unwinders. */
1147 frame_unwind_append_unwinder (gdbarch, &moxie_frame_unwind);
1149 /* Single stepping. */
1150 set_gdbarch_software_single_step (gdbarch, moxie_software_single_step);
1152 /* Support simple overlay manager. */
1153 set_gdbarch_overlay_update (gdbarch, simple_overlay_update);
1155 /* Support reverse debugging. */
1156 set_gdbarch_process_record (gdbarch, moxie_process_record);
1161 /* Register this machine's init routine. */
1164 _initialize_moxie_tdep (void)
1166 register_gdbarch_init (bfd_arch_moxie, moxie_gdbarch_init);