1 /* Target-dependent code for Motorola 68HC11 & 68HC12
2 Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
3 Contributed by Stephane Carrez, stcarrez@nerim.fr
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, Boston, MA 02111-1307, USA. */
24 #include "frame-unwind.h"
25 #include "frame-base.h"
26 #include "dwarf2-frame.h"
27 #include "trad-frame.h"
32 #include "gdb_string.h"
38 #include "arch-utils.h"
40 #include "reggroups.h"
43 #include "opcode/m68hc11.h"
44 #include "elf/m68hc11.h"
47 /* Macros for setting and testing a bit in a minimal symbol.
48 For 68HC11/68HC12 we have two flags that tell which return
49 type the function is using. This is used for prologue and frame
50 analysis to compute correct stack frame layout.
52 The MSB of the minimal symbol's "info" field is used for this purpose.
54 MSYMBOL_SET_RTC Actually sets the "RTC" bit.
55 MSYMBOL_SET_RTI Actually sets the "RTI" bit.
56 MSYMBOL_IS_RTC Tests the "RTC" bit in a minimal symbol.
57 MSYMBOL_IS_RTI Tests the "RTC" bit in a minimal symbol. */
59 #define MSYMBOL_SET_RTC(msym) \
60 MSYMBOL_INFO (msym) = (char *) (((long) MSYMBOL_INFO (msym)) \
63 #define MSYMBOL_SET_RTI(msym) \
64 MSYMBOL_INFO (msym) = (char *) (((long) MSYMBOL_INFO (msym)) \
67 #define MSYMBOL_IS_RTC(msym) \
68 (((long) MSYMBOL_INFO (msym) & 0x80000000) != 0)
70 #define MSYMBOL_IS_RTI(msym) \
71 (((long) MSYMBOL_INFO (msym) & 0x40000000) != 0)
73 enum insn_return_kind
{
80 /* Register numbers of various important registers.
81 Note that some of these values are "real" register numbers,
82 and correspond to the general registers of the machine,
83 and some are "phony" register numbers which are too large
84 to be actual register numbers as far as the user is concerned
85 but do serve to get the desired values when passed to read_register. */
87 #define HARD_X_REGNUM 0
88 #define HARD_D_REGNUM 1
89 #define HARD_Y_REGNUM 2
90 #define HARD_SP_REGNUM 3
91 #define HARD_PC_REGNUM 4
93 #define HARD_A_REGNUM 5
94 #define HARD_B_REGNUM 6
95 #define HARD_CCR_REGNUM 7
97 /* 68HC12 page number register.
98 Note: to keep a compatibility with gcc register naming, we must
99 not have to rename FP and other soft registers. The page register
100 is a real hard register and must therefore be counted by NUM_REGS.
101 For this it has the same number as Z register (which is not used). */
102 #define HARD_PAGE_REGNUM 8
103 #define M68HC11_LAST_HARD_REG (HARD_PAGE_REGNUM)
105 /* Z is replaced by X or Y by gcc during machine reorg.
106 ??? There is no way to get it and even know whether
107 it's in X or Y or in ZS. */
108 #define SOFT_Z_REGNUM 8
110 /* Soft registers. These registers are special. There are treated
111 like normal hard registers by gcc and gdb (ie, within dwarf2 info).
112 They are physically located in memory. */
113 #define SOFT_FP_REGNUM 9
114 #define SOFT_TMP_REGNUM 10
115 #define SOFT_ZS_REGNUM 11
116 #define SOFT_XY_REGNUM 12
117 #define SOFT_UNUSED_REGNUM 13
118 #define SOFT_D1_REGNUM 14
119 #define SOFT_D32_REGNUM (SOFT_D1_REGNUM+31)
120 #define M68HC11_MAX_SOFT_REGS 32
122 #define M68HC11_NUM_REGS (8)
123 #define M68HC11_NUM_PSEUDO_REGS (M68HC11_MAX_SOFT_REGS+5)
124 #define M68HC11_ALL_REGS (M68HC11_NUM_REGS+M68HC11_NUM_PSEUDO_REGS)
126 #define M68HC11_REG_SIZE (2)
128 #define M68HC12_NUM_REGS (9)
129 #define M68HC12_NUM_PSEUDO_REGS ((M68HC11_MAX_SOFT_REGS+5)+1-1)
130 #define M68HC12_HARD_PC_REGNUM (SOFT_D32_REGNUM+1)
132 struct insn_sequence
;
135 /* Stack pointer correction value. For 68hc11, the stack pointer points
136 to the next push location. An offset of 1 must be applied to obtain
137 the address where the last value is saved. For 68hc12, the stack
138 pointer points to the last value pushed. No offset is necessary. */
139 int stack_correction
;
141 /* Description of instructions in the prologue. */
142 struct insn_sequence
*prologue
;
144 /* True if the page memory bank register is available
146 int use_page_register
;
148 /* ELF flags for ABI. */
152 #define M6811_TDEP gdbarch_tdep (current_gdbarch)
153 #define STACK_CORRECTION (M6811_TDEP->stack_correction)
154 #define USE_PAGE_REGISTER (M6811_TDEP->use_page_register)
156 struct m68hc11_unwind_cache
158 /* The previous frame's inner most stack address. Used as this
159 frame ID's stack_addr. */
161 /* The frame's base, optionally used by the high-level debug info. */
169 enum insn_return_kind return_kind
;
171 /* Table indicating the location of each and every register. */
172 struct trad_frame_saved_reg
*saved_regs
;
175 /* Table of registers for 68HC11. This includes the hard registers
176 and the soft registers used by GCC. */
178 m68hc11_register_names
[] =
180 "x", "d", "y", "sp", "pc", "a", "b",
181 "ccr", "page", "frame","tmp", "zs", "xy", 0,
182 "d1", "d2", "d3", "d4", "d5", "d6", "d7",
183 "d8", "d9", "d10", "d11", "d12", "d13", "d14",
184 "d15", "d16", "d17", "d18", "d19", "d20", "d21",
185 "d22", "d23", "d24", "d25", "d26", "d27", "d28",
186 "d29", "d30", "d31", "d32"
189 struct m68hc11_soft_reg
195 static struct m68hc11_soft_reg soft_regs
[M68HC11_ALL_REGS
];
197 #define M68HC11_FP_ADDR soft_regs[SOFT_FP_REGNUM].addr
199 static int soft_min_addr
;
200 static int soft_max_addr
;
201 static int soft_reg_initialized
= 0;
203 /* Look in the symbol table for the address of a pseudo register
204 in memory. If we don't find it, pretend the register is not used
205 and not available. */
207 m68hc11_get_register_info (struct m68hc11_soft_reg
*reg
, const char *name
)
209 struct minimal_symbol
*msymbol
;
211 msymbol
= lookup_minimal_symbol (name
, NULL
, NULL
);
214 reg
->addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
215 reg
->name
= xstrdup (name
);
217 /* Keep track of the address range for soft registers. */
218 if (reg
->addr
< (CORE_ADDR
) soft_min_addr
)
219 soft_min_addr
= reg
->addr
;
220 if (reg
->addr
> (CORE_ADDR
) soft_max_addr
)
221 soft_max_addr
= reg
->addr
;
230 /* Initialize the table of soft register addresses according
231 to the symbol table. */
233 m68hc11_initialize_register_info (void)
237 if (soft_reg_initialized
)
240 soft_min_addr
= INT_MAX
;
242 for (i
= 0; i
< M68HC11_ALL_REGS
; i
++)
244 soft_regs
[i
].name
= 0;
247 m68hc11_get_register_info (&soft_regs
[SOFT_FP_REGNUM
], "_.frame");
248 m68hc11_get_register_info (&soft_regs
[SOFT_TMP_REGNUM
], "_.tmp");
249 m68hc11_get_register_info (&soft_regs
[SOFT_ZS_REGNUM
], "_.z");
250 soft_regs
[SOFT_Z_REGNUM
] = soft_regs
[SOFT_ZS_REGNUM
];
251 m68hc11_get_register_info (&soft_regs
[SOFT_XY_REGNUM
], "_.xy");
253 for (i
= SOFT_D1_REGNUM
; i
< M68HC11_MAX_SOFT_REGS
; i
++)
257 sprintf (buf
, "_.d%d", i
- SOFT_D1_REGNUM
+ 1);
258 m68hc11_get_register_info (&soft_regs
[i
], buf
);
261 if (soft_regs
[SOFT_FP_REGNUM
].name
== 0)
263 warning ("No frame soft register found in the symbol table.\n");
264 warning ("Stack backtrace will not work.\n");
266 soft_reg_initialized
= 1;
269 /* Given an address in memory, return the soft register number if
270 that address corresponds to a soft register. Returns -1 if not. */
272 m68hc11_which_soft_register (CORE_ADDR addr
)
276 if (addr
< soft_min_addr
|| addr
> soft_max_addr
)
279 for (i
= SOFT_FP_REGNUM
; i
< M68HC11_ALL_REGS
; i
++)
281 if (soft_regs
[i
].name
&& soft_regs
[i
].addr
== addr
)
287 /* Fetch a pseudo register. The 68hc11 soft registers are treated like
288 pseudo registers. They are located in memory. Translate the register
289 fetch into a memory read. */
291 m68hc11_pseudo_register_read (struct gdbarch
*gdbarch
,
292 struct regcache
*regcache
,
293 int regno
, void *buf
)
295 /* The PC is a pseudo reg only for 68HC12 with the memory bank
297 if (regno
== M68HC12_HARD_PC_REGNUM
)
300 const int regsize
= TYPE_LENGTH (builtin_type_uint32
);
302 regcache_cooked_read_unsigned (regcache
, HARD_PC_REGNUM
, &pc
);
303 if (pc
>= 0x8000 && pc
< 0xc000)
307 regcache_cooked_read_unsigned (regcache
, HARD_PAGE_REGNUM
, &page
);
312 store_unsigned_integer (buf
, regsize
, pc
);
316 m68hc11_initialize_register_info ();
318 /* Fetch a soft register: translate into a memory read. */
319 if (soft_regs
[regno
].name
)
321 target_read_memory (soft_regs
[regno
].addr
, buf
, 2);
329 /* Store a pseudo register. Translate the register store
330 into a memory write. */
332 m68hc11_pseudo_register_write (struct gdbarch
*gdbarch
,
333 struct regcache
*regcache
,
334 int regno
, const void *buf
)
336 /* The PC is a pseudo reg only for 68HC12 with the memory bank
338 if (regno
== M68HC12_HARD_PC_REGNUM
)
340 const int regsize
= TYPE_LENGTH (builtin_type_uint32
);
341 char *tmp
= alloca (regsize
);
344 memcpy (tmp
, buf
, regsize
);
345 pc
= extract_unsigned_integer (tmp
, regsize
);
349 regcache_cooked_write_unsigned (regcache
, HARD_PAGE_REGNUM
,
352 regcache_cooked_write_unsigned (regcache
, HARD_PC_REGNUM
,
356 regcache_cooked_write_unsigned (regcache
, HARD_PC_REGNUM
, pc
);
360 m68hc11_initialize_register_info ();
362 /* Store a soft register: translate into a memory write. */
363 if (soft_regs
[regno
].name
)
365 const int regsize
= 2;
366 char *tmp
= alloca (regsize
);
367 memcpy (tmp
, buf
, regsize
);
368 target_write_memory (soft_regs
[regno
].addr
, tmp
, regsize
);
373 m68hc11_register_name (int reg_nr
)
375 if (reg_nr
== M68HC12_HARD_PC_REGNUM
&& USE_PAGE_REGISTER
)
377 if (reg_nr
== HARD_PC_REGNUM
&& USE_PAGE_REGISTER
)
382 if (reg_nr
>= M68HC11_ALL_REGS
)
385 /* If we don't know the address of a soft register, pretend it
387 if (reg_nr
> M68HC11_LAST_HARD_REG
&& soft_regs
[reg_nr
].name
== 0)
389 return m68hc11_register_names
[reg_nr
];
392 static const unsigned char *
393 m68hc11_breakpoint_from_pc (CORE_ADDR
*pcptr
, int *lenptr
)
395 static unsigned char breakpoint
[] = {0x0};
397 *lenptr
= sizeof (breakpoint
);
402 /* 68HC11 & 68HC12 prologue analysis.
407 /* 68HC11 opcodes. */
408 #undef M6811_OP_PAGE2
409 #define M6811_OP_PAGE2 (0x18)
410 #define M6811_OP_LDX (0xde)
411 #define M6811_OP_LDX_EXT (0xfe)
412 #define M6811_OP_PSHX (0x3c)
413 #define M6811_OP_STS (0x9f)
414 #define M6811_OP_STS_EXT (0xbf)
415 #define M6811_OP_TSX (0x30)
416 #define M6811_OP_XGDX (0x8f)
417 #define M6811_OP_ADDD (0xc3)
418 #define M6811_OP_TXS (0x35)
419 #define M6811_OP_DES (0x34)
421 /* 68HC12 opcodes. */
422 #define M6812_OP_PAGE2 (0x18)
423 #define M6812_OP_MOVW (0x01)
424 #define M6812_PB_PSHW (0xae)
425 #define M6812_OP_STS (0x5f)
426 #define M6812_OP_STS_EXT (0x7f)
427 #define M6812_OP_LEAS (0x1b)
428 #define M6812_OP_PSHX (0x34)
429 #define M6812_OP_PSHY (0x35)
431 /* Operand extraction. */
432 #define OP_DIRECT (0x100) /* 8-byte direct addressing. */
433 #define OP_IMM_LOW (0x200) /* Low part of 16-bit constant/address. */
434 #define OP_IMM_HIGH (0x300) /* High part of 16-bit constant/address. */
435 #define OP_PBYTE (0x400) /* 68HC12 indexed operand. */
437 /* Identification of the sequence. */
441 P_SAVE_REG
, /* Save a register on the stack. */
442 P_SET_FRAME
, /* Setup the frame pointer. */
443 P_LOCAL_1
, /* Allocate 1 byte for locals. */
444 P_LOCAL_2
, /* Allocate 2 bytes for locals. */
445 P_LOCAL_N
/* Allocate N bytes for locals. */
448 struct insn_sequence
{
449 enum m6811_seq_type type
;
451 unsigned short code
[MAX_CODES
];
454 /* Sequence of instructions in the 68HC11 function prologue. */
455 static struct insn_sequence m6811_prologue
[] = {
456 /* Sequences to save a soft-register. */
457 { P_SAVE_REG
, 3, { M6811_OP_LDX
, OP_DIRECT
,
459 { P_SAVE_REG
, 5, { M6811_OP_PAGE2
, M6811_OP_LDX
, OP_DIRECT
,
460 M6811_OP_PAGE2
, M6811_OP_PSHX
} },
461 { P_SAVE_REG
, 4, { M6811_OP_LDX_EXT
, OP_IMM_HIGH
, OP_IMM_LOW
,
463 { P_SAVE_REG
, 6, { M6811_OP_PAGE2
, M6811_OP_LDX_EXT
, OP_IMM_HIGH
, OP_IMM_LOW
,
464 M6811_OP_PAGE2
, M6811_OP_PSHX
} },
466 /* Sequences to allocate local variables. */
467 { P_LOCAL_N
, 7, { M6811_OP_TSX
,
469 M6811_OP_ADDD
, OP_IMM_HIGH
, OP_IMM_LOW
,
472 { P_LOCAL_N
, 11, { M6811_OP_PAGE2
, M6811_OP_TSX
,
473 M6811_OP_PAGE2
, M6811_OP_XGDX
,
474 M6811_OP_ADDD
, OP_IMM_HIGH
, OP_IMM_LOW
,
475 M6811_OP_PAGE2
, M6811_OP_XGDX
,
476 M6811_OP_PAGE2
, M6811_OP_TXS
} },
477 { P_LOCAL_1
, 1, { M6811_OP_DES
} },
478 { P_LOCAL_2
, 1, { M6811_OP_PSHX
} },
479 { P_LOCAL_2
, 2, { M6811_OP_PAGE2
, M6811_OP_PSHX
} },
481 /* Initialize the frame pointer. */
482 { P_SET_FRAME
, 2, { M6811_OP_STS
, OP_DIRECT
} },
483 { P_SET_FRAME
, 3, { M6811_OP_STS_EXT
, OP_IMM_HIGH
, OP_IMM_LOW
} },
488 /* Sequence of instructions in the 68HC12 function prologue. */
489 static struct insn_sequence m6812_prologue
[] = {
490 { P_SAVE_REG
, 5, { M6812_OP_PAGE2
, M6812_OP_MOVW
, M6812_PB_PSHW
,
491 OP_IMM_HIGH
, OP_IMM_LOW
} },
492 { P_SET_FRAME
, 2, { M6812_OP_STS
, OP_DIRECT
} },
493 { P_SET_FRAME
, 3, { M6812_OP_STS_EXT
, OP_IMM_HIGH
, OP_IMM_LOW
} },
494 { P_LOCAL_N
, 2, { M6812_OP_LEAS
, OP_PBYTE
} },
495 { P_LOCAL_2
, 1, { M6812_OP_PSHX
} },
496 { P_LOCAL_2
, 1, { M6812_OP_PSHY
} },
501 /* Analyze the sequence of instructions starting at the given address.
502 Returns a pointer to the sequence when it is recognized and
503 the optional value (constant/address) associated with it. */
504 static struct insn_sequence
*
505 m68hc11_analyze_instruction (struct insn_sequence
*seq
, CORE_ADDR pc
,
508 unsigned char buffer
[MAX_CODES
];
515 for (; seq
->type
!= P_LAST
; seq
++)
518 for (j
= 0; j
< seq
->length
; j
++)
522 buffer
[bufsize
] = read_memory_unsigned_integer (pc
+ bufsize
,
526 /* Continue while we match the opcode. */
527 if (seq
->code
[j
] == buffer
[j
])
530 if ((seq
->code
[j
] & 0xf00) == 0)
533 /* Extract a sequence parameter (address or constant). */
534 switch (seq
->code
[j
])
537 cur_val
= (CORE_ADDR
) buffer
[j
];
541 cur_val
= cur_val
& 0x0ff;
542 cur_val
|= (buffer
[j
] << 8);
547 cur_val
|= buffer
[j
];
551 if ((buffer
[j
] & 0xE0) == 0x80)
553 v
= buffer
[j
] & 0x1f;
557 else if ((buffer
[j
] & 0xfe) == 0xf0)
559 v
= read_memory_unsigned_integer (pc
+ j
+ 1, 1);
563 else if (buffer
[j
] == 0xf2)
565 v
= read_memory_unsigned_integer (pc
+ j
+ 1, 2);
572 /* We have a full match. */
573 if (j
== seq
->length
)
582 /* Return the instruction that the function at the PC is using. */
583 static enum insn_return_kind
584 m68hc11_get_return_insn (CORE_ADDR pc
)
586 struct minimal_symbol
*sym
;
588 /* A flag indicating that this is a STO_M68HC12_FAR or STO_M68HC12_INTERRUPT
589 function is stored by elfread.c in the high bit of the info field.
590 Use this to decide which instruction the function uses to return. */
591 sym
= lookup_minimal_symbol_by_pc (pc
);
595 if (MSYMBOL_IS_RTC (sym
))
597 else if (MSYMBOL_IS_RTI (sym
))
603 /* Analyze the function prologue to find some information
605 - the PC of the first line (for m68hc11_skip_prologue)
606 - the offset of the previous frame saved address (from current frame)
607 - the soft registers which are pushed. */
609 m68hc11_scan_prologue (CORE_ADDR pc
, CORE_ADDR current_pc
,
610 struct m68hc11_unwind_cache
*info
)
615 int found_frame_point
;
618 struct insn_sequence
*seq_table
;
622 if (pc
>= current_pc
)
627 m68hc11_initialize_register_info ();
634 seq_table
= gdbarch_tdep (current_gdbarch
)->prologue
;
636 /* The 68hc11 stack is as follows:
652 +-----------+ <--- current frame
655 With most processors (like 68K) the previous frame can be computed
656 easily because it is always at a fixed offset (see link/unlink).
657 That is, locals are accessed with negative offsets, arguments are
658 accessed with positive ones. Since 68hc11 only supports offsets
659 in the range [0..255], the frame is defined at the bottom of
660 locals (see picture).
662 The purpose of the analysis made here is to find out the size
663 of locals in this function. An alternative to this is to use
664 DWARF2 info. This would be better but I don't know how to
665 access dwarf2 debug from this function.
667 Walk from the function entry point to the point where we save
668 the frame. While walking instructions, compute the size of bytes
669 which are pushed. This gives us the index to access the previous
672 We limit the search to 128 bytes so that the algorithm is bounded
673 in case of random and wrong code. We also stop and abort if
674 we find an instruction which is not supposed to appear in the
675 prologue (as generated by gcc 2.95, 2.96).
678 found_frame_point
= 0;
681 while (!done
&& pc
+ 2 < func_end
)
683 struct insn_sequence
*seq
;
686 seq
= m68hc11_analyze_instruction (seq_table
, pc
, &val
);
690 /* If we are within the instruction group, we can't advance the
691 pc nor the stack offset. Otherwise the caller's stack computed
692 from the current stack can be wrong. */
693 if (pc
+ seq
->length
> current_pc
)
696 pc
= pc
+ seq
->length
;
697 if (seq
->type
== P_SAVE_REG
)
699 if (found_frame_point
)
701 saved_reg
= m68hc11_which_soft_register (val
);
706 info
->saved_regs
[saved_reg
].addr
= save_addr
;
713 else if (seq
->type
== P_SET_FRAME
)
715 found_frame_point
= 1;
718 else if (seq
->type
== P_LOCAL_1
)
722 else if (seq
->type
== P_LOCAL_2
)
726 else if (seq
->type
== P_LOCAL_N
)
728 /* Stack pointer is decremented for the allocation. */
730 size
-= (int) (val
) | 0xffff0000;
735 if (found_frame_point
== 0)
736 info
->sp_offset
= size
;
738 info
->sp_offset
= -1;
743 m68hc11_skip_prologue (CORE_ADDR pc
)
745 CORE_ADDR func_addr
, func_end
;
746 struct symtab_and_line sal
;
747 struct m68hc11_unwind_cache tmp_cache
= { 0 };
749 /* If we have line debugging information, then the end of the
750 prologue should be the first assembly instruction of the
751 first source line. */
752 if (find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
754 sal
= find_pc_line (func_addr
, 0);
755 if (sal
.end
&& sal
.end
< func_end
)
759 pc
= m68hc11_scan_prologue (pc
, (CORE_ADDR
) -1, &tmp_cache
);
764 m68hc11_unwind_pc (struct gdbarch
*gdbarch
, struct frame_info
*next_frame
)
768 frame_unwind_unsigned_register (next_frame
, gdbarch_pc_regnum (gdbarch
),
773 /* Put here the code to store, into fi->saved_regs, the addresses of
774 the saved registers of frame described by FRAME_INFO. This
775 includes special registers such as pc and fp saved in special ways
776 in the stack frame. sp is even more special: the address we return
777 for it IS the sp for the next frame. */
779 struct m68hc11_unwind_cache
*
780 m68hc11_frame_unwind_cache (struct frame_info
*next_frame
,
781 void **this_prologue_cache
)
785 struct m68hc11_unwind_cache
*info
;
786 CORE_ADDR current_pc
;
789 if ((*this_prologue_cache
))
790 return (*this_prologue_cache
);
792 info
= FRAME_OBSTACK_ZALLOC (struct m68hc11_unwind_cache
);
793 (*this_prologue_cache
) = info
;
794 info
->saved_regs
= trad_frame_alloc_saved_regs (next_frame
);
796 info
->pc
= frame_func_unwind (next_frame
);
799 info
->return_kind
= m68hc11_get_return_insn (info
->pc
);
801 /* The SP was moved to the FP. This indicates that a new frame
802 was created. Get THIS frame's FP value by unwinding it from
804 frame_unwind_unsigned_register (next_frame
, SOFT_FP_REGNUM
, &this_base
);
811 current_pc
= frame_pc_unwind (next_frame
);
813 m68hc11_scan_prologue (info
->pc
, current_pc
, info
);
815 info
->saved_regs
[HARD_PC_REGNUM
].addr
= info
->size
;
817 if (info
->sp_offset
!= (CORE_ADDR
) -1)
819 info
->saved_regs
[HARD_PC_REGNUM
].addr
= info
->sp_offset
;
820 frame_unwind_unsigned_register (next_frame
, HARD_SP_REGNUM
, &this_base
);
821 prev_sp
= this_base
+ info
->sp_offset
+ 2;
822 this_base
+= STACK_CORRECTION
;
826 /* The FP points at the last saved register. Adjust the FP back
827 to before the first saved register giving the SP. */
828 prev_sp
= this_base
+ info
->size
+ 2;
830 this_base
+= STACK_CORRECTION
;
831 if (soft_regs
[SOFT_FP_REGNUM
].name
)
832 info
->saved_regs
[SOFT_FP_REGNUM
].addr
= info
->size
- 2;
835 if (info
->return_kind
== RETURN_RTC
)
838 info
->saved_regs
[HARD_PAGE_REGNUM
].addr
= info
->size
;
839 info
->saved_regs
[HARD_PC_REGNUM
].addr
= info
->size
+ 1;
841 else if (info
->return_kind
== RETURN_RTI
)
844 info
->saved_regs
[HARD_CCR_REGNUM
].addr
= info
->size
;
845 info
->saved_regs
[HARD_D_REGNUM
].addr
= info
->size
+ 1;
846 info
->saved_regs
[HARD_X_REGNUM
].addr
= info
->size
+ 3;
847 info
->saved_regs
[HARD_Y_REGNUM
].addr
= info
->size
+ 5;
848 info
->saved_regs
[HARD_PC_REGNUM
].addr
= info
->size
+ 7;
851 /* Add 1 here to adjust for the post-decrement nature of the push
853 info
->prev_sp
= prev_sp
;
855 info
->base
= this_base
;
857 /* Adjust all the saved registers so that they contain addresses and not
859 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
- 1; i
++)
860 if (trad_frame_addr_p (info
->saved_regs
, i
))
862 info
->saved_regs
[i
].addr
+= this_base
;
865 /* The previous frame's SP needed to be computed. Save the computed
867 trad_frame_set_value (info
->saved_regs
, HARD_SP_REGNUM
, info
->prev_sp
);
872 /* Given a GDB frame, determine the address of the calling function's
873 frame. This will be used to create a new GDB frame struct. */
876 m68hc11_frame_this_id (struct frame_info
*next_frame
,
877 void **this_prologue_cache
,
878 struct frame_id
*this_id
)
880 struct m68hc11_unwind_cache
*info
881 = m68hc11_frame_unwind_cache (next_frame
, this_prologue_cache
);
886 /* The FUNC is easy. */
887 func
= frame_func_unwind (next_frame
);
889 /* Hopefully the prologue analysis either correctly determined the
890 frame's base (which is the SP from the previous frame), or set
891 that base to "NULL". */
892 base
= info
->prev_sp
;
896 id
= frame_id_build (base
, func
);
898 /* Check that we're not going round in circles with the same frame
899 ID (but avoid applying the test to sentinel frames which do go
900 round in circles). Can't use frame_id_eq() as that doesn't yet
901 compare the frame's PC value. */
902 if (frame_relative_level (next_frame
) >= 0
903 && get_frame_type (next_frame
) != DUMMY_FRAME
904 && frame_id_eq (get_frame_id (next_frame
), id
))
911 m68hc11_frame_prev_register (struct frame_info
*next_frame
,
912 void **this_prologue_cache
,
913 int regnum
, int *optimizedp
,
914 enum lval_type
*lvalp
, CORE_ADDR
*addrp
,
915 int *realnump
, void *bufferp
)
917 struct m68hc11_unwind_cache
*info
918 = m68hc11_frame_unwind_cache (next_frame
, this_prologue_cache
);
920 trad_frame_prev_register (next_frame
, info
->saved_regs
, regnum
,
921 optimizedp
, lvalp
, addrp
, realnump
, bufferp
);
923 if (regnum
== HARD_PC_REGNUM
)
925 /* Take into account the 68HC12 specific call (PC + page). */
926 if (info
->return_kind
== RETURN_RTC
927 && *addrp
>= 0x08000 && *addrp
< 0x0c000
928 && USE_PAGE_REGISTER
)
934 trad_frame_prev_register (next_frame
, info
->saved_regs
,
935 HARD_PAGE_REGNUM
, &page_optimized
,
938 *addrp
+= ((page
& 0x0ff) << 14);
944 static const struct frame_unwind m68hc11_frame_unwind
= {
946 m68hc11_frame_this_id
,
947 m68hc11_frame_prev_register
950 const struct frame_unwind
*
951 m68hc11_frame_sniffer (struct frame_info
*next_frame
)
953 return &m68hc11_frame_unwind
;
957 m68hc11_frame_base_address (struct frame_info
*next_frame
, void **this_cache
)
959 struct m68hc11_unwind_cache
*info
960 = m68hc11_frame_unwind_cache (next_frame
, this_cache
);
966 m68hc11_frame_args_address (struct frame_info
*next_frame
, void **this_cache
)
969 struct m68hc11_unwind_cache
*info
970 = m68hc11_frame_unwind_cache (next_frame
, this_cache
);
972 addr
= info
->base
+ info
->size
;
973 if (info
->return_kind
== RETURN_RTC
)
975 else if (info
->return_kind
== RETURN_RTI
)
981 static const struct frame_base m68hc11_frame_base
= {
982 &m68hc11_frame_unwind
,
983 m68hc11_frame_base_address
,
984 m68hc11_frame_base_address
,
985 m68hc11_frame_args_address
989 m68hc11_unwind_sp (struct gdbarch
*gdbarch
, struct frame_info
*next_frame
)
992 frame_unwind_unsigned_register (next_frame
, HARD_SP_REGNUM
, &sp
);
996 /* Assuming NEXT_FRAME->prev is a dummy, return the frame ID of that
997 dummy frame. The frame ID's base needs to match the TOS value
998 saved by save_dummy_frame_tos(), and the PC match the dummy frame's
1001 static struct frame_id
1002 m68hc11_unwind_dummy_id (struct gdbarch
*gdbarch
, struct frame_info
*next_frame
)
1005 CORE_ADDR pc
= frame_pc_unwind (next_frame
);
1007 frame_unwind_unsigned_register (next_frame
, SOFT_FP_REGNUM
, &tos
);
1009 return frame_id_build (tos
, pc
);
1013 /* Get and print the register from the given frame. */
1015 m68hc11_print_register (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1016 struct frame_info
*frame
, int regno
)
1020 if (regno
== HARD_PC_REGNUM
|| regno
== HARD_SP_REGNUM
1021 || regno
== SOFT_FP_REGNUM
|| regno
== M68HC12_HARD_PC_REGNUM
)
1022 rval
= get_frame_register_unsigned (frame
, regno
);
1024 rval
= get_frame_register_signed (frame
, regno
);
1026 if (regno
== HARD_A_REGNUM
|| regno
== HARD_B_REGNUM
1027 || regno
== HARD_CCR_REGNUM
|| regno
== HARD_PAGE_REGNUM
)
1029 fprintf_filtered (file
, "0x%02x ", (unsigned char) rval
);
1030 if (regno
!= HARD_CCR_REGNUM
)
1031 print_longest (file
, 'd', 1, rval
);
1035 if (regno
== HARD_PC_REGNUM
&& gdbarch_tdep (gdbarch
)->use_page_register
)
1039 page
= get_frame_register_unsigned (frame
, HARD_PAGE_REGNUM
);
1040 fprintf_filtered (file
, "0x%02x:%04x ", (unsigned) page
,
1045 fprintf_filtered (file
, "0x%04x ", (unsigned) rval
);
1046 if (regno
!= HARD_PC_REGNUM
&& regno
!= HARD_SP_REGNUM
1047 && regno
!= SOFT_FP_REGNUM
&& regno
!= M68HC12_HARD_PC_REGNUM
)
1048 print_longest (file
, 'd', 1, rval
);
1052 if (regno
== HARD_CCR_REGNUM
)
1056 unsigned char l
= rval
& 0xff;
1058 fprintf_filtered (file
, "%c%c%c%c%c%c%c%c ",
1059 l
& M6811_S_BIT
? 'S' : '-',
1060 l
& M6811_X_BIT
? 'X' : '-',
1061 l
& M6811_H_BIT
? 'H' : '-',
1062 l
& M6811_I_BIT
? 'I' : '-',
1063 l
& M6811_N_BIT
? 'N' : '-',
1064 l
& M6811_Z_BIT
? 'Z' : '-',
1065 l
& M6811_V_BIT
? 'V' : '-',
1066 l
& M6811_C_BIT
? 'C' : '-');
1067 N
= (l
& M6811_N_BIT
) != 0;
1068 Z
= (l
& M6811_Z_BIT
) != 0;
1069 V
= (l
& M6811_V_BIT
) != 0;
1070 C
= (l
& M6811_C_BIT
) != 0;
1072 /* Print flags following the h8300 */
1074 fprintf_filtered (file
, "u> ");
1075 else if ((C
| Z
) == 1)
1076 fprintf_filtered (file
, "u<= ");
1078 fprintf_filtered (file
, "u< ");
1081 fprintf_filtered (file
, "!= ");
1083 fprintf_filtered (file
, "== ");
1086 fprintf_filtered (file
, ">= ");
1088 fprintf_filtered (file
, "< ");
1090 if ((Z
| (N
^ V
)) == 0)
1091 fprintf_filtered (file
, "> ");
1093 fprintf_filtered (file
, "<= ");
1097 /* Same as 'info reg' but prints the registers in a different way. */
1099 m68hc11_print_registers_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1100 struct frame_info
*frame
, int regno
, int cpregs
)
1104 const char *name
= gdbarch_register_name (gdbarch
, regno
);
1106 if (!name
|| !*name
)
1109 fprintf_filtered (file
, "%-10s ", name
);
1110 m68hc11_print_register (gdbarch
, file
, frame
, regno
);
1111 fprintf_filtered (file
, "\n");
1117 fprintf_filtered (file
, "PC=");
1118 m68hc11_print_register (gdbarch
, file
, frame
, HARD_PC_REGNUM
);
1120 fprintf_filtered (file
, " SP=");
1121 m68hc11_print_register (gdbarch
, file
, frame
, HARD_SP_REGNUM
);
1123 fprintf_filtered (file
, " FP=");
1124 m68hc11_print_register (gdbarch
, file
, frame
, SOFT_FP_REGNUM
);
1126 fprintf_filtered (file
, "\nCCR=");
1127 m68hc11_print_register (gdbarch
, file
, frame
, HARD_CCR_REGNUM
);
1129 fprintf_filtered (file
, "\nD=");
1130 m68hc11_print_register (gdbarch
, file
, frame
, HARD_D_REGNUM
);
1132 fprintf_filtered (file
, " X=");
1133 m68hc11_print_register (gdbarch
, file
, frame
, HARD_X_REGNUM
);
1135 fprintf_filtered (file
, " Y=");
1136 m68hc11_print_register (gdbarch
, file
, frame
, HARD_Y_REGNUM
);
1138 if (gdbarch_tdep (gdbarch
)->use_page_register
)
1140 fprintf_filtered (file
, "\nPage=");
1141 m68hc11_print_register (gdbarch
, file
, frame
, HARD_PAGE_REGNUM
);
1143 fprintf_filtered (file
, "\n");
1146 for (i
= SOFT_D1_REGNUM
; i
< M68HC11_ALL_REGS
; i
++)
1148 /* Skip registers which are not defined in the symbol table. */
1149 if (soft_regs
[i
].name
== 0)
1152 fprintf_filtered (file
, "D%d=", i
- SOFT_D1_REGNUM
+ 1);
1153 m68hc11_print_register (gdbarch
, file
, frame
, i
);
1156 fprintf_filtered (file
, "\n");
1158 fprintf_filtered (file
, " ");
1160 if (nr
&& (nr
% 8) != 7)
1161 fprintf_filtered (file
, "\n");
1165 /* Same as 'info reg' but prints the registers in a different way. */
1167 show_regs (char *args
, int from_tty
)
1169 m68hc11_print_registers_info (current_gdbarch
, gdb_stdout
,
1170 get_current_frame (), -1, 1);
1174 m68hc11_stack_align (CORE_ADDR addr
)
1176 return ((addr
+ 1) & -2);
1180 m68hc11_push_dummy_call (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
,
1181 struct regcache
*regcache
, CORE_ADDR bp_addr
,
1182 int nargs
, struct value
**args
, CORE_ADDR sp
,
1183 int struct_return
, CORE_ADDR struct_addr
)
1186 int first_stack_argnum
;
1192 first_stack_argnum
= 0;
1195 /* The struct is allocated on the stack and gdb used the stack
1196 pointer for the address of that struct. We must apply the
1197 stack offset on the address. */
1198 regcache_cooked_write_unsigned (regcache
, HARD_D_REGNUM
,
1199 struct_addr
+ STACK_CORRECTION
);
1203 type
= VALUE_TYPE (args
[0]);
1204 len
= TYPE_LENGTH (type
);
1206 /* First argument is passed in D and X registers. */
1211 v
= extract_unsigned_integer (VALUE_CONTENTS (args
[0]), len
);
1212 first_stack_argnum
= 1;
1214 regcache_cooked_write_unsigned (regcache
, HARD_D_REGNUM
, v
);
1218 regcache_cooked_write_unsigned (regcache
, HARD_X_REGNUM
, v
);
1223 for (argnum
= nargs
- 1; argnum
>= first_stack_argnum
; argnum
--)
1225 type
= VALUE_TYPE (args
[argnum
]);
1226 len
= TYPE_LENGTH (type
);
1230 static char zero
= 0;
1233 write_memory (sp
, &zero
, 1);
1235 val
= (char*) VALUE_CONTENTS (args
[argnum
]);
1237 write_memory (sp
, val
, len
);
1240 /* Store return address. */
1242 store_unsigned_integer (buf
, 2, bp_addr
);
1243 write_memory (sp
, buf
, 2);
1245 /* Finally, update the stack pointer... */
1246 sp
-= STACK_CORRECTION
;
1247 regcache_cooked_write_unsigned (regcache
, HARD_SP_REGNUM
, sp
);
1249 /* ...and fake a frame pointer. */
1250 regcache_cooked_write_unsigned (regcache
, SOFT_FP_REGNUM
, sp
);
1252 /* DWARF2/GCC uses the stack address *before* the function call as a
1258 /* Return the GDB type object for the "standard" data type
1259 of data in register N. */
1261 static struct type
*
1262 m68hc11_register_type (struct gdbarch
*gdbarch
, int reg_nr
)
1266 case HARD_PAGE_REGNUM
:
1269 case HARD_CCR_REGNUM
:
1270 return builtin_type_uint8
;
1272 case M68HC12_HARD_PC_REGNUM
:
1273 return builtin_type_uint32
;
1276 return builtin_type_uint16
;
1281 m68hc11_store_return_value (struct type
*type
, struct regcache
*regcache
,
1286 len
= TYPE_LENGTH (type
);
1288 /* First argument is passed in D and X registers. */
1290 regcache_raw_write_part (regcache
, HARD_D_REGNUM
, 2 - len
, len
, valbuf
);
1293 regcache_raw_write_part (regcache
, HARD_X_REGNUM
, 4 - len
,
1295 regcache_raw_write (regcache
, HARD_D_REGNUM
, (char*) valbuf
+ (len
- 2));
1298 error ("return of value > 4 is not supported.");
1302 /* Given a return value in `regcache' with a type `type',
1303 extract and copy its value into `valbuf'. */
1306 m68hc11_extract_return_value (struct type
*type
, struct regcache
*regcache
,
1309 int len
= TYPE_LENGTH (type
);
1310 char buf
[M68HC11_REG_SIZE
];
1312 regcache_raw_read (regcache
, HARD_D_REGNUM
, buf
);
1316 memcpy (valbuf
, buf
+ 1, 1);
1320 memcpy (valbuf
, buf
, 2);
1324 memcpy ((char*) valbuf
+ 1, buf
, 2);
1325 regcache_raw_read (regcache
, HARD_X_REGNUM
, buf
);
1326 memcpy (valbuf
, buf
+ 1, 1);
1330 memcpy ((char*) valbuf
+ 2, buf
, 2);
1331 regcache_raw_read (regcache
, HARD_X_REGNUM
, buf
);
1332 memcpy (valbuf
, buf
, 2);
1336 error ("bad size for return value");
1340 /* Should call_function allocate stack space for a struct return? */
1342 m68hc11_use_struct_convention (int gcc_p
, struct type
*type
)
1344 return (TYPE_CODE (type
) == TYPE_CODE_STRUCT
1345 || TYPE_CODE (type
) == TYPE_CODE_UNION
1346 || TYPE_LENGTH (type
) > 4);
1350 m68hc11_return_value_on_stack (struct type
*type
)
1352 return TYPE_LENGTH (type
) > 4;
1355 /* Extract from an array REGBUF containing the (raw) register state
1356 the address in which a function should return its structure value,
1357 as a CORE_ADDR (or an expression that can be used as one). */
1359 m68hc11_extract_struct_value_address (struct regcache
*regcache
)
1361 char buf
[M68HC11_REG_SIZE
];
1363 regcache_cooked_read (regcache
, HARD_D_REGNUM
, buf
);
1364 return extract_unsigned_integer (buf
, M68HC11_REG_SIZE
);
1367 /* Test whether the ELF symbol corresponds to a function using rtc or
1371 m68hc11_elf_make_msymbol_special (asymbol
*sym
, struct minimal_symbol
*msym
)
1373 unsigned char flags
;
1375 flags
= ((elf_symbol_type
*)sym
)->internal_elf_sym
.st_other
;
1376 if (flags
& STO_M68HC12_FAR
)
1377 MSYMBOL_SET_RTC (msym
);
1378 if (flags
& STO_M68HC12_INTERRUPT
)
1379 MSYMBOL_SET_RTI (msym
);
1383 gdb_print_insn_m68hc11 (bfd_vma memaddr
, disassemble_info
*info
)
1385 if (TARGET_ARCHITECTURE
->arch
== bfd_arch_m68hc11
)
1386 return print_insn_m68hc11 (memaddr
, info
);
1388 return print_insn_m68hc12 (memaddr
, info
);
1393 /* 68HC11/68HC12 register groups.
1394 Identify real hard registers and soft registers used by gcc. */
1396 static struct reggroup
*m68hc11_soft_reggroup
;
1397 static struct reggroup
*m68hc11_hard_reggroup
;
1400 m68hc11_init_reggroups (void)
1402 m68hc11_hard_reggroup
= reggroup_new ("hard", USER_REGGROUP
);
1403 m68hc11_soft_reggroup
= reggroup_new ("soft", USER_REGGROUP
);
1407 m68hc11_add_reggroups (struct gdbarch
*gdbarch
)
1409 reggroup_add (gdbarch
, m68hc11_hard_reggroup
);
1410 reggroup_add (gdbarch
, m68hc11_soft_reggroup
);
1411 reggroup_add (gdbarch
, general_reggroup
);
1412 reggroup_add (gdbarch
, float_reggroup
);
1413 reggroup_add (gdbarch
, all_reggroup
);
1414 reggroup_add (gdbarch
, save_reggroup
);
1415 reggroup_add (gdbarch
, restore_reggroup
);
1416 reggroup_add (gdbarch
, vector_reggroup
);
1417 reggroup_add (gdbarch
, system_reggroup
);
1421 m68hc11_register_reggroup_p (struct gdbarch
*gdbarch
, int regnum
,
1422 struct reggroup
*group
)
1424 /* We must save the real hard register as well as gcc
1425 soft registers including the frame pointer. */
1426 if (group
== save_reggroup
|| group
== restore_reggroup
)
1428 return (regnum
<= gdbarch_num_regs (gdbarch
)
1429 || ((regnum
== SOFT_FP_REGNUM
1430 || regnum
== SOFT_TMP_REGNUM
1431 || regnum
== SOFT_ZS_REGNUM
1432 || regnum
== SOFT_XY_REGNUM
)
1433 && m68hc11_register_name (regnum
)));
1436 /* Group to identify gcc soft registers (d1..dN). */
1437 if (group
== m68hc11_soft_reggroup
)
1439 return regnum
>= SOFT_D1_REGNUM
&& m68hc11_register_name (regnum
);
1442 if (group
== m68hc11_hard_reggroup
)
1444 return regnum
== HARD_PC_REGNUM
|| regnum
== HARD_SP_REGNUM
1445 || regnum
== HARD_X_REGNUM
|| regnum
== HARD_D_REGNUM
1446 || regnum
== HARD_Y_REGNUM
|| regnum
== HARD_CCR_REGNUM
;
1448 return default_register_reggroup_p (gdbarch
, regnum
, group
);
1451 static struct gdbarch
*
1452 m68hc11_gdbarch_init (struct gdbarch_info info
,
1453 struct gdbarch_list
*arches
)
1455 struct gdbarch
*gdbarch
;
1456 struct gdbarch_tdep
*tdep
;
1459 soft_reg_initialized
= 0;
1461 /* Extract the elf_flags if available. */
1462 if (info
.abfd
!= NULL
1463 && bfd_get_flavour (info
.abfd
) == bfd_target_elf_flavour
)
1464 elf_flags
= elf_elfheader (info
.abfd
)->e_flags
;
1468 /* try to find a pre-existing architecture */
1469 for (arches
= gdbarch_list_lookup_by_info (arches
, &info
);
1471 arches
= gdbarch_list_lookup_by_info (arches
->next
, &info
))
1473 if (gdbarch_tdep (arches
->gdbarch
)->elf_flags
!= elf_flags
)
1476 return arches
->gdbarch
;
1479 /* Need a new architecture. Fill in a target specific vector. */
1480 tdep
= (struct gdbarch_tdep
*) xmalloc (sizeof (struct gdbarch_tdep
));
1481 gdbarch
= gdbarch_alloc (&info
, tdep
);
1482 tdep
->elf_flags
= elf_flags
;
1484 switch (info
.bfd_arch_info
->arch
)
1486 case bfd_arch_m68hc11
:
1487 tdep
->stack_correction
= 1;
1488 tdep
->use_page_register
= 0;
1489 tdep
->prologue
= m6811_prologue
;
1490 set_gdbarch_addr_bit (gdbarch
, 16);
1491 set_gdbarch_num_pseudo_regs (gdbarch
, M68HC11_NUM_PSEUDO_REGS
);
1492 set_gdbarch_pc_regnum (gdbarch
, HARD_PC_REGNUM
);
1493 set_gdbarch_num_regs (gdbarch
, M68HC11_NUM_REGS
);
1496 case bfd_arch_m68hc12
:
1497 tdep
->stack_correction
= 0;
1498 tdep
->use_page_register
= elf_flags
& E_M68HC12_BANKS
;
1499 tdep
->prologue
= m6812_prologue
;
1500 set_gdbarch_addr_bit (gdbarch
, elf_flags
& E_M68HC12_BANKS
? 32 : 16);
1501 set_gdbarch_num_pseudo_regs (gdbarch
,
1502 elf_flags
& E_M68HC12_BANKS
1503 ? M68HC12_NUM_PSEUDO_REGS
1504 : M68HC11_NUM_PSEUDO_REGS
);
1505 set_gdbarch_pc_regnum (gdbarch
, elf_flags
& E_M68HC12_BANKS
1506 ? M68HC12_HARD_PC_REGNUM
: HARD_PC_REGNUM
);
1507 set_gdbarch_num_regs (gdbarch
, elf_flags
& E_M68HC12_BANKS
1508 ? M68HC12_NUM_REGS
: M68HC11_NUM_REGS
);
1515 /* Initially set everything according to the ABI.
1516 Use 16-bit integers since it will be the case for most
1517 programs. The size of these types should normally be set
1518 according to the dwarf2 debug information. */
1519 set_gdbarch_short_bit (gdbarch
, 16);
1520 set_gdbarch_int_bit (gdbarch
, elf_flags
& E_M68HC11_I32
? 32 : 16);
1521 set_gdbarch_float_bit (gdbarch
, 32);
1522 set_gdbarch_double_bit (gdbarch
, elf_flags
& E_M68HC11_F64
? 64 : 32);
1523 set_gdbarch_long_double_bit (gdbarch
, 64);
1524 set_gdbarch_long_bit (gdbarch
, 32);
1525 set_gdbarch_ptr_bit (gdbarch
, 16);
1526 set_gdbarch_long_long_bit (gdbarch
, 64);
1528 /* Characters are unsigned. */
1529 set_gdbarch_char_signed (gdbarch
, 0);
1531 set_gdbarch_unwind_pc (gdbarch
, m68hc11_unwind_pc
);
1532 set_gdbarch_unwind_sp (gdbarch
, m68hc11_unwind_sp
);
1534 /* Set register info. */
1535 set_gdbarch_fp0_regnum (gdbarch
, -1);
1536 set_gdbarch_frame_args_skip (gdbarch
, 0);
1538 set_gdbarch_write_pc (gdbarch
, generic_target_write_pc
);
1540 set_gdbarch_sp_regnum (gdbarch
, HARD_SP_REGNUM
);
1541 set_gdbarch_register_name (gdbarch
, m68hc11_register_name
);
1542 set_gdbarch_register_type (gdbarch
, m68hc11_register_type
);
1543 set_gdbarch_pseudo_register_read (gdbarch
, m68hc11_pseudo_register_read
);
1544 set_gdbarch_pseudo_register_write (gdbarch
, m68hc11_pseudo_register_write
);
1546 set_gdbarch_push_dummy_call (gdbarch
, m68hc11_push_dummy_call
);
1548 set_gdbarch_extract_return_value (gdbarch
, m68hc11_extract_return_value
);
1549 set_gdbarch_return_value_on_stack (gdbarch
, m68hc11_return_value_on_stack
);
1551 set_gdbarch_store_return_value (gdbarch
, m68hc11_store_return_value
);
1552 set_gdbarch_extract_struct_value_address (gdbarch
, m68hc11_extract_struct_value_address
);
1554 set_gdbarch_store_return_value (gdbarch
, m68hc11_store_return_value
);
1555 set_gdbarch_extract_struct_value_address (gdbarch
, m68hc11_extract_struct_value_address
);
1556 set_gdbarch_use_struct_convention (gdbarch
, m68hc11_use_struct_convention
);
1557 set_gdbarch_skip_prologue (gdbarch
, m68hc11_skip_prologue
);
1558 set_gdbarch_inner_than (gdbarch
, core_addr_lessthan
);
1559 set_gdbarch_decr_pc_after_break (gdbarch
, 0);
1560 set_gdbarch_function_start_offset (gdbarch
, 0);
1561 set_gdbarch_breakpoint_from_pc (gdbarch
, m68hc11_breakpoint_from_pc
);
1562 set_gdbarch_deprecated_stack_align (gdbarch
, m68hc11_stack_align
);
1563 set_gdbarch_print_insn (gdbarch
, gdb_print_insn_m68hc11
);
1565 m68hc11_add_reggroups (gdbarch
);
1566 set_gdbarch_register_reggroup_p (gdbarch
, m68hc11_register_reggroup_p
);
1567 set_gdbarch_print_registers_info (gdbarch
, m68hc11_print_registers_info
);
1569 /* Hook in the DWARF CFI frame unwinder. */
1570 frame_unwind_append_sniffer (gdbarch
, dwarf2_frame_sniffer
);
1572 frame_unwind_append_sniffer (gdbarch
, m68hc11_frame_sniffer
);
1573 frame_base_set_default (gdbarch
, &m68hc11_frame_base
);
1575 /* Methods for saving / extracting a dummy frame's ID. The ID's
1576 stack address must match the SP value returned by
1577 PUSH_DUMMY_CALL, and saved by generic_save_dummy_frame_tos. */
1578 set_gdbarch_unwind_dummy_id (gdbarch
, m68hc11_unwind_dummy_id
);
1580 /* Return the unwound PC value. */
1581 set_gdbarch_unwind_pc (gdbarch
, m68hc11_unwind_pc
);
1583 /* Minsymbol frobbing. */
1584 set_gdbarch_elf_make_msymbol_special (gdbarch
,
1585 m68hc11_elf_make_msymbol_special
);
1587 set_gdbarch_believe_pcc_promotion (gdbarch
, 1);
1592 extern initialize_file_ftype _initialize_m68hc11_tdep
; /* -Wmissing-prototypes */
1595 _initialize_m68hc11_tdep (void)
1597 register_gdbarch_init (bfd_arch_m68hc11
, m68hc11_gdbarch_init
);
1598 register_gdbarch_init (bfd_arch_m68hc12
, m68hc11_gdbarch_init
);
1599 m68hc11_init_reggroups ();
1601 deprecate_cmd (add_com ("regs", class_vars
, show_regs
,
1602 "Print all registers"),