1 /* Target-dependent code for Motorola 68HC11 & 68HC12
3 Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
4 Free Software Foundation, Inc.
6 Contributed by Stephane Carrez, stcarrez@nerim.fr
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/>. */
26 #include "frame-unwind.h"
27 #include "frame-base.h"
28 #include "dwarf2-frame.h"
29 #include "trad-frame.h"
34 #include "gdb_string.h"
40 #include "arch-utils.h"
42 #include "reggroups.h"
45 #include "opcode/m68hc11.h"
46 #include "elf/m68hc11.h"
49 /* Macros for setting and testing a bit in a minimal symbol.
50 For 68HC11/68HC12 we have two flags that tell which return
51 type the function is using. This is used for prologue and frame
52 analysis to compute correct stack frame layout.
54 The MSB of the minimal symbol's "info" field is used for this purpose.
56 MSYMBOL_SET_RTC Actually sets the "RTC" bit.
57 MSYMBOL_SET_RTI Actually sets the "RTI" bit.
58 MSYMBOL_IS_RTC Tests the "RTC" bit in a minimal symbol.
59 MSYMBOL_IS_RTI Tests the "RTC" bit in a minimal symbol. */
61 #define MSYMBOL_SET_RTC(msym) \
62 MSYMBOL_INFO (msym) = (char *) (((long) MSYMBOL_INFO (msym)) \
65 #define MSYMBOL_SET_RTI(msym) \
66 MSYMBOL_INFO (msym) = (char *) (((long) MSYMBOL_INFO (msym)) \
69 #define MSYMBOL_IS_RTC(msym) \
70 (((long) MSYMBOL_INFO (msym) & 0x80000000) != 0)
72 #define MSYMBOL_IS_RTI(msym) \
73 (((long) MSYMBOL_INFO (msym) & 0x40000000) != 0)
75 enum insn_return_kind
{
82 /* Register numbers of various important registers. */
84 #define HARD_X_REGNUM 0
85 #define HARD_D_REGNUM 1
86 #define HARD_Y_REGNUM 2
87 #define HARD_SP_REGNUM 3
88 #define HARD_PC_REGNUM 4
90 #define HARD_A_REGNUM 5
91 #define HARD_B_REGNUM 6
92 #define HARD_CCR_REGNUM 7
94 /* 68HC12 page number register.
95 Note: to keep a compatibility with gcc register naming, we must
96 not have to rename FP and other soft registers. The page register
97 is a real hard register and must therefore be counted by gdbarch_num_regs.
98 For this it has the same number as Z register (which is not used). */
99 #define HARD_PAGE_REGNUM 8
100 #define M68HC11_LAST_HARD_REG (HARD_PAGE_REGNUM)
102 /* Z is replaced by X or Y by gcc during machine reorg.
103 ??? There is no way to get it and even know whether
104 it's in X or Y or in ZS. */
105 #define SOFT_Z_REGNUM 8
107 /* Soft registers. These registers are special. There are treated
108 like normal hard registers by gcc and gdb (ie, within dwarf2 info).
109 They are physically located in memory. */
110 #define SOFT_FP_REGNUM 9
111 #define SOFT_TMP_REGNUM 10
112 #define SOFT_ZS_REGNUM 11
113 #define SOFT_XY_REGNUM 12
114 #define SOFT_UNUSED_REGNUM 13
115 #define SOFT_D1_REGNUM 14
116 #define SOFT_D32_REGNUM (SOFT_D1_REGNUM+31)
117 #define M68HC11_MAX_SOFT_REGS 32
119 #define M68HC11_NUM_REGS (8)
120 #define M68HC11_NUM_PSEUDO_REGS (M68HC11_MAX_SOFT_REGS+5)
121 #define M68HC11_ALL_REGS (M68HC11_NUM_REGS+M68HC11_NUM_PSEUDO_REGS)
123 #define M68HC11_REG_SIZE (2)
125 #define M68HC12_NUM_REGS (9)
126 #define M68HC12_NUM_PSEUDO_REGS ((M68HC11_MAX_SOFT_REGS+5)+1-1)
127 #define M68HC12_HARD_PC_REGNUM (SOFT_D32_REGNUM+1)
129 struct insn_sequence
;
132 /* Stack pointer correction value. For 68hc11, the stack pointer points
133 to the next push location. An offset of 1 must be applied to obtain
134 the address where the last value is saved. For 68hc12, the stack
135 pointer points to the last value pushed. No offset is necessary. */
136 int stack_correction
;
138 /* Description of instructions in the prologue. */
139 struct insn_sequence
*prologue
;
141 /* True if the page memory bank register is available
143 int use_page_register
;
145 /* ELF flags for ABI. */
149 #define STACK_CORRECTION(gdbarch) (gdbarch_tdep (gdbarch)->stack_correction)
150 #define USE_PAGE_REGISTER(gdbarch) (gdbarch_tdep (gdbarch)->use_page_register)
152 struct m68hc11_unwind_cache
154 /* The previous frame's inner most stack address. Used as this
155 frame ID's stack_addr. */
157 /* The frame's base, optionally used by the high-level debug info. */
165 enum insn_return_kind return_kind
;
167 /* Table indicating the location of each and every register. */
168 struct trad_frame_saved_reg
*saved_regs
;
171 /* Table of registers for 68HC11. This includes the hard registers
172 and the soft registers used by GCC. */
174 m68hc11_register_names
[] =
176 "x", "d", "y", "sp", "pc", "a", "b",
177 "ccr", "page", "frame","tmp", "zs", "xy", 0,
178 "d1", "d2", "d3", "d4", "d5", "d6", "d7",
179 "d8", "d9", "d10", "d11", "d12", "d13", "d14",
180 "d15", "d16", "d17", "d18", "d19", "d20", "d21",
181 "d22", "d23", "d24", "d25", "d26", "d27", "d28",
182 "d29", "d30", "d31", "d32"
185 struct m68hc11_soft_reg
191 static struct m68hc11_soft_reg soft_regs
[M68HC11_ALL_REGS
];
193 #define M68HC11_FP_ADDR soft_regs[SOFT_FP_REGNUM].addr
195 static int soft_min_addr
;
196 static int soft_max_addr
;
197 static int soft_reg_initialized
= 0;
199 /* Look in the symbol table for the address of a pseudo register
200 in memory. If we don't find it, pretend the register is not used
201 and not available. */
203 m68hc11_get_register_info (struct m68hc11_soft_reg
*reg
, const char *name
)
205 struct minimal_symbol
*msymbol
;
207 msymbol
= lookup_minimal_symbol (name
, NULL
, NULL
);
210 reg
->addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
211 reg
->name
= xstrdup (name
);
213 /* Keep track of the address range for soft registers. */
214 if (reg
->addr
< (CORE_ADDR
) soft_min_addr
)
215 soft_min_addr
= reg
->addr
;
216 if (reg
->addr
> (CORE_ADDR
) soft_max_addr
)
217 soft_max_addr
= reg
->addr
;
226 /* Initialize the table of soft register addresses according
227 to the symbol table. */
229 m68hc11_initialize_register_info (void)
233 if (soft_reg_initialized
)
236 soft_min_addr
= INT_MAX
;
238 for (i
= 0; i
< M68HC11_ALL_REGS
; i
++)
240 soft_regs
[i
].name
= 0;
243 m68hc11_get_register_info (&soft_regs
[SOFT_FP_REGNUM
], "_.frame");
244 m68hc11_get_register_info (&soft_regs
[SOFT_TMP_REGNUM
], "_.tmp");
245 m68hc11_get_register_info (&soft_regs
[SOFT_ZS_REGNUM
], "_.z");
246 soft_regs
[SOFT_Z_REGNUM
] = soft_regs
[SOFT_ZS_REGNUM
];
247 m68hc11_get_register_info (&soft_regs
[SOFT_XY_REGNUM
], "_.xy");
249 for (i
= SOFT_D1_REGNUM
; i
< M68HC11_MAX_SOFT_REGS
; i
++)
253 sprintf (buf
, "_.d%d", i
- SOFT_D1_REGNUM
+ 1);
254 m68hc11_get_register_info (&soft_regs
[i
], buf
);
257 if (soft_regs
[SOFT_FP_REGNUM
].name
== 0)
258 warning (_("No frame soft register found in the symbol table.\n"
259 "Stack backtrace will not work."));
260 soft_reg_initialized
= 1;
263 /* Given an address in memory, return the soft register number if
264 that address corresponds to a soft register. Returns -1 if not. */
266 m68hc11_which_soft_register (CORE_ADDR addr
)
270 if (addr
< soft_min_addr
|| addr
> soft_max_addr
)
273 for (i
= SOFT_FP_REGNUM
; i
< M68HC11_ALL_REGS
; i
++)
275 if (soft_regs
[i
].name
&& soft_regs
[i
].addr
== addr
)
281 /* Fetch a pseudo register. The 68hc11 soft registers are treated like
282 pseudo registers. They are located in memory. Translate the register
283 fetch into a memory read. */
285 m68hc11_pseudo_register_read (struct gdbarch
*gdbarch
,
286 struct regcache
*regcache
,
287 int regno
, gdb_byte
*buf
)
289 /* The PC is a pseudo reg only for 68HC12 with the memory bank
291 if (regno
== M68HC12_HARD_PC_REGNUM
)
294 const int regsize
= TYPE_LENGTH (builtin_type_uint32
);
296 regcache_cooked_read_unsigned (regcache
, HARD_PC_REGNUM
, &pc
);
297 if (pc
>= 0x8000 && pc
< 0xc000)
301 regcache_cooked_read_unsigned (regcache
, HARD_PAGE_REGNUM
, &page
);
306 store_unsigned_integer (buf
, regsize
, pc
);
310 m68hc11_initialize_register_info ();
312 /* Fetch a soft register: translate into a memory read. */
313 if (soft_regs
[regno
].name
)
315 target_read_memory (soft_regs
[regno
].addr
, buf
, 2);
323 /* Store a pseudo register. Translate the register store
324 into a memory write. */
326 m68hc11_pseudo_register_write (struct gdbarch
*gdbarch
,
327 struct regcache
*regcache
,
328 int regno
, const gdb_byte
*buf
)
330 /* The PC is a pseudo reg only for 68HC12 with the memory bank
332 if (regno
== M68HC12_HARD_PC_REGNUM
)
334 const int regsize
= TYPE_LENGTH (builtin_type_uint32
);
335 char *tmp
= alloca (regsize
);
338 memcpy (tmp
, buf
, regsize
);
339 pc
= extract_unsigned_integer (tmp
, regsize
);
343 regcache_cooked_write_unsigned (regcache
, HARD_PAGE_REGNUM
,
346 regcache_cooked_write_unsigned (regcache
, HARD_PC_REGNUM
,
350 regcache_cooked_write_unsigned (regcache
, HARD_PC_REGNUM
, pc
);
354 m68hc11_initialize_register_info ();
356 /* Store a soft register: translate into a memory write. */
357 if (soft_regs
[regno
].name
)
359 const int regsize
= 2;
360 char *tmp
= alloca (regsize
);
361 memcpy (tmp
, buf
, regsize
);
362 target_write_memory (soft_regs
[regno
].addr
, tmp
, regsize
);
367 m68hc11_register_name (struct gdbarch
*gdbarch
, int reg_nr
)
369 if (reg_nr
== M68HC12_HARD_PC_REGNUM
&& USE_PAGE_REGISTER (gdbarch
))
371 if (reg_nr
== HARD_PC_REGNUM
&& USE_PAGE_REGISTER (gdbarch
))
376 if (reg_nr
>= M68HC11_ALL_REGS
)
379 m68hc11_initialize_register_info ();
381 /* If we don't know the address of a soft register, pretend it
383 if (reg_nr
> M68HC11_LAST_HARD_REG
&& soft_regs
[reg_nr
].name
== 0)
385 return m68hc11_register_names
[reg_nr
];
388 static const unsigned char *
389 m68hc11_breakpoint_from_pc (struct gdbarch
*gdbarch
, CORE_ADDR
*pcptr
,
392 static unsigned char breakpoint
[] = {0x0};
394 *lenptr
= sizeof (breakpoint
);
399 /* 68HC11 & 68HC12 prologue analysis.
404 /* 68HC11 opcodes. */
405 #undef M6811_OP_PAGE2
406 #define M6811_OP_PAGE2 (0x18)
407 #define M6811_OP_LDX (0xde)
408 #define M6811_OP_LDX_EXT (0xfe)
409 #define M6811_OP_PSHX (0x3c)
410 #define M6811_OP_STS (0x9f)
411 #define M6811_OP_STS_EXT (0xbf)
412 #define M6811_OP_TSX (0x30)
413 #define M6811_OP_XGDX (0x8f)
414 #define M6811_OP_ADDD (0xc3)
415 #define M6811_OP_TXS (0x35)
416 #define M6811_OP_DES (0x34)
418 /* 68HC12 opcodes. */
419 #define M6812_OP_PAGE2 (0x18)
420 #define M6812_OP_MOVW (0x01)
421 #define M6812_PB_PSHW (0xae)
422 #define M6812_OP_STS (0x5f)
423 #define M6812_OP_STS_EXT (0x7f)
424 #define M6812_OP_LEAS (0x1b)
425 #define M6812_OP_PSHX (0x34)
426 #define M6812_OP_PSHY (0x35)
428 /* Operand extraction. */
429 #define OP_DIRECT (0x100) /* 8-byte direct addressing. */
430 #define OP_IMM_LOW (0x200) /* Low part of 16-bit constant/address. */
431 #define OP_IMM_HIGH (0x300) /* High part of 16-bit constant/address. */
432 #define OP_PBYTE (0x400) /* 68HC12 indexed operand. */
434 /* Identification of the sequence. */
438 P_SAVE_REG
, /* Save a register on the stack. */
439 P_SET_FRAME
, /* Setup the frame pointer. */
440 P_LOCAL_1
, /* Allocate 1 byte for locals. */
441 P_LOCAL_2
, /* Allocate 2 bytes for locals. */
442 P_LOCAL_N
/* Allocate N bytes for locals. */
445 struct insn_sequence
{
446 enum m6811_seq_type type
;
448 unsigned short code
[MAX_CODES
];
451 /* Sequence of instructions in the 68HC11 function prologue. */
452 static struct insn_sequence m6811_prologue
[] = {
453 /* Sequences to save a soft-register. */
454 { P_SAVE_REG
, 3, { M6811_OP_LDX
, OP_DIRECT
,
456 { P_SAVE_REG
, 5, { M6811_OP_PAGE2
, M6811_OP_LDX
, OP_DIRECT
,
457 M6811_OP_PAGE2
, M6811_OP_PSHX
} },
458 { P_SAVE_REG
, 4, { M6811_OP_LDX_EXT
, OP_IMM_HIGH
, OP_IMM_LOW
,
460 { P_SAVE_REG
, 6, { M6811_OP_PAGE2
, M6811_OP_LDX_EXT
, OP_IMM_HIGH
, OP_IMM_LOW
,
461 M6811_OP_PAGE2
, M6811_OP_PSHX
} },
463 /* Sequences to allocate local variables. */
464 { P_LOCAL_N
, 7, { M6811_OP_TSX
,
466 M6811_OP_ADDD
, OP_IMM_HIGH
, OP_IMM_LOW
,
469 { P_LOCAL_N
, 11, { M6811_OP_PAGE2
, M6811_OP_TSX
,
470 M6811_OP_PAGE2
, M6811_OP_XGDX
,
471 M6811_OP_ADDD
, OP_IMM_HIGH
, OP_IMM_LOW
,
472 M6811_OP_PAGE2
, M6811_OP_XGDX
,
473 M6811_OP_PAGE2
, M6811_OP_TXS
} },
474 { P_LOCAL_1
, 1, { M6811_OP_DES
} },
475 { P_LOCAL_2
, 1, { M6811_OP_PSHX
} },
476 { P_LOCAL_2
, 2, { M6811_OP_PAGE2
, M6811_OP_PSHX
} },
478 /* Initialize the frame pointer. */
479 { P_SET_FRAME
, 2, { M6811_OP_STS
, OP_DIRECT
} },
480 { P_SET_FRAME
, 3, { M6811_OP_STS_EXT
, OP_IMM_HIGH
, OP_IMM_LOW
} },
485 /* Sequence of instructions in the 68HC12 function prologue. */
486 static struct insn_sequence m6812_prologue
[] = {
487 { P_SAVE_REG
, 5, { M6812_OP_PAGE2
, M6812_OP_MOVW
, M6812_PB_PSHW
,
488 OP_IMM_HIGH
, OP_IMM_LOW
} },
489 { P_SET_FRAME
, 2, { M6812_OP_STS
, OP_DIRECT
} },
490 { P_SET_FRAME
, 3, { M6812_OP_STS_EXT
, OP_IMM_HIGH
, OP_IMM_LOW
} },
491 { P_LOCAL_N
, 2, { M6812_OP_LEAS
, OP_PBYTE
} },
492 { P_LOCAL_2
, 1, { M6812_OP_PSHX
} },
493 { P_LOCAL_2
, 1, { M6812_OP_PSHY
} },
498 /* Analyze the sequence of instructions starting at the given address.
499 Returns a pointer to the sequence when it is recognized and
500 the optional value (constant/address) associated with it. */
501 static struct insn_sequence
*
502 m68hc11_analyze_instruction (struct insn_sequence
*seq
, CORE_ADDR pc
,
505 unsigned char buffer
[MAX_CODES
];
512 for (; seq
->type
!= P_LAST
; seq
++)
515 for (j
= 0; j
< seq
->length
; j
++)
519 buffer
[bufsize
] = read_memory_unsigned_integer (pc
+ bufsize
,
523 /* Continue while we match the opcode. */
524 if (seq
->code
[j
] == buffer
[j
])
527 if ((seq
->code
[j
] & 0xf00) == 0)
530 /* Extract a sequence parameter (address or constant). */
531 switch (seq
->code
[j
])
534 cur_val
= (CORE_ADDR
) buffer
[j
];
538 cur_val
= cur_val
& 0x0ff;
539 cur_val
|= (buffer
[j
] << 8);
544 cur_val
|= buffer
[j
];
548 if ((buffer
[j
] & 0xE0) == 0x80)
550 v
= buffer
[j
] & 0x1f;
554 else if ((buffer
[j
] & 0xfe) == 0xf0)
556 v
= read_memory_unsigned_integer (pc
+ j
+ 1, 1);
560 else if (buffer
[j
] == 0xf2)
562 v
= read_memory_unsigned_integer (pc
+ j
+ 1, 2);
569 /* We have a full match. */
570 if (j
== seq
->length
)
579 /* Return the instruction that the function at the PC is using. */
580 static enum insn_return_kind
581 m68hc11_get_return_insn (CORE_ADDR pc
)
583 struct minimal_symbol
*sym
;
585 /* A flag indicating that this is a STO_M68HC12_FAR or STO_M68HC12_INTERRUPT
586 function is stored by elfread.c in the high bit of the info field.
587 Use this to decide which instruction the function uses to return. */
588 sym
= lookup_minimal_symbol_by_pc (pc
);
592 if (MSYMBOL_IS_RTC (sym
))
594 else if (MSYMBOL_IS_RTI (sym
))
600 /* Analyze the function prologue to find some information
602 - the PC of the first line (for m68hc11_skip_prologue)
603 - the offset of the previous frame saved address (from current frame)
604 - the soft registers which are pushed. */
606 m68hc11_scan_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
,
607 CORE_ADDR current_pc
, struct m68hc11_unwind_cache
*info
)
612 int found_frame_point
;
615 struct insn_sequence
*seq_table
;
619 if (pc
>= current_pc
)
624 m68hc11_initialize_register_info ();
631 seq_table
= gdbarch_tdep (gdbarch
)->prologue
;
633 /* The 68hc11 stack is as follows:
649 +-----------+ <--- current frame
652 With most processors (like 68K) the previous frame can be computed
653 easily because it is always at a fixed offset (see link/unlink).
654 That is, locals are accessed with negative offsets, arguments are
655 accessed with positive ones. Since 68hc11 only supports offsets
656 in the range [0..255], the frame is defined at the bottom of
657 locals (see picture).
659 The purpose of the analysis made here is to find out the size
660 of locals in this function. An alternative to this is to use
661 DWARF2 info. This would be better but I don't know how to
662 access dwarf2 debug from this function.
664 Walk from the function entry point to the point where we save
665 the frame. While walking instructions, compute the size of bytes
666 which are pushed. This gives us the index to access the previous
669 We limit the search to 128 bytes so that the algorithm is bounded
670 in case of random and wrong code. We also stop and abort if
671 we find an instruction which is not supposed to appear in the
672 prologue (as generated by gcc 2.95, 2.96).
675 found_frame_point
= 0;
678 while (!done
&& pc
+ 2 < func_end
)
680 struct insn_sequence
*seq
;
683 seq
= m68hc11_analyze_instruction (seq_table
, pc
, &val
);
687 /* If we are within the instruction group, we can't advance the
688 pc nor the stack offset. Otherwise the caller's stack computed
689 from the current stack can be wrong. */
690 if (pc
+ seq
->length
> current_pc
)
693 pc
= pc
+ seq
->length
;
694 if (seq
->type
== P_SAVE_REG
)
696 if (found_frame_point
)
698 saved_reg
= m68hc11_which_soft_register (val
);
703 if (info
->saved_regs
)
704 info
->saved_regs
[saved_reg
].addr
= save_addr
;
711 else if (seq
->type
== P_SET_FRAME
)
713 found_frame_point
= 1;
716 else if (seq
->type
== P_LOCAL_1
)
720 else if (seq
->type
== P_LOCAL_2
)
724 else if (seq
->type
== P_LOCAL_N
)
726 /* Stack pointer is decremented for the allocation. */
728 size
-= (int) (val
) | 0xffff0000;
733 if (found_frame_point
== 0)
734 info
->sp_offset
= size
;
736 info
->sp_offset
= -1;
741 m68hc11_skip_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
)
743 CORE_ADDR func_addr
, func_end
;
744 struct symtab_and_line sal
;
745 struct m68hc11_unwind_cache tmp_cache
= { 0 };
747 /* If we have line debugging information, then the end of the
748 prologue should be the first assembly instruction of the
749 first source line. */
750 if (find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
752 sal
= find_pc_line (func_addr
, 0);
753 if (sal
.end
&& sal
.end
< func_end
)
757 pc
= m68hc11_scan_prologue (gdbarch
, pc
, (CORE_ADDR
) -1, &tmp_cache
);
762 m68hc11_unwind_pc (struct gdbarch
*gdbarch
, struct frame_info
*next_frame
)
766 pc
= frame_unwind_register_unsigned (next_frame
, gdbarch_pc_regnum (gdbarch
));
770 /* Put here the code to store, into fi->saved_regs, the addresses of
771 the saved registers of frame described by FRAME_INFO. This
772 includes special registers such as pc and fp saved in special ways
773 in the stack frame. sp is even more special: the address we return
774 for it IS the sp for the next frame. */
776 struct m68hc11_unwind_cache
*
777 m68hc11_frame_unwind_cache (struct frame_info
*this_frame
,
778 void **this_prologue_cache
)
780 struct gdbarch
*gdbarch
= get_frame_arch (this_frame
);
783 struct m68hc11_unwind_cache
*info
;
784 CORE_ADDR current_pc
;
787 if ((*this_prologue_cache
))
788 return (*this_prologue_cache
);
790 info
= FRAME_OBSTACK_ZALLOC (struct m68hc11_unwind_cache
);
791 (*this_prologue_cache
) = info
;
792 info
->saved_regs
= trad_frame_alloc_saved_regs (this_frame
);
794 info
->pc
= get_frame_func (this_frame
);
797 info
->return_kind
= m68hc11_get_return_insn (info
->pc
);
799 /* The SP was moved to the FP. This indicates that a new frame
800 was created. Get THIS frame's FP value by unwinding it from
802 this_base
= get_frame_register_unsigned (this_frame
, SOFT_FP_REGNUM
);
809 current_pc
= get_frame_pc (this_frame
);
811 m68hc11_scan_prologue (gdbarch
, info
->pc
, current_pc
, info
);
813 info
->saved_regs
[HARD_PC_REGNUM
].addr
= info
->size
;
815 if (info
->sp_offset
!= (CORE_ADDR
) -1)
817 info
->saved_regs
[HARD_PC_REGNUM
].addr
= info
->sp_offset
;
818 this_base
= get_frame_register_unsigned (this_frame
, HARD_SP_REGNUM
);
819 prev_sp
= this_base
+ info
->sp_offset
+ 2;
820 this_base
+= STACK_CORRECTION (gdbarch
);
824 /* The FP points at the last saved register. Adjust the FP back
825 to before the first saved register giving the SP. */
826 prev_sp
= this_base
+ info
->size
+ 2;
828 this_base
+= STACK_CORRECTION (gdbarch
);
829 if (soft_regs
[SOFT_FP_REGNUM
].name
)
830 info
->saved_regs
[SOFT_FP_REGNUM
].addr
= info
->size
- 2;
833 if (info
->return_kind
== RETURN_RTC
)
836 info
->saved_regs
[HARD_PAGE_REGNUM
].addr
= info
->size
;
837 info
->saved_regs
[HARD_PC_REGNUM
].addr
= info
->size
+ 1;
839 else if (info
->return_kind
== RETURN_RTI
)
842 info
->saved_regs
[HARD_CCR_REGNUM
].addr
= info
->size
;
843 info
->saved_regs
[HARD_D_REGNUM
].addr
= info
->size
+ 1;
844 info
->saved_regs
[HARD_X_REGNUM
].addr
= info
->size
+ 3;
845 info
->saved_regs
[HARD_Y_REGNUM
].addr
= info
->size
+ 5;
846 info
->saved_regs
[HARD_PC_REGNUM
].addr
= info
->size
+ 7;
849 /* Add 1 here to adjust for the post-decrement nature of the push
851 info
->prev_sp
= prev_sp
;
853 info
->base
= this_base
;
855 /* Adjust all the saved registers so that they contain addresses and not
858 i
< gdbarch_num_regs (gdbarch
)
859 + gdbarch_num_pseudo_regs (gdbarch
) - 1;
861 if (trad_frame_addr_p (info
->saved_regs
, i
))
863 info
->saved_regs
[i
].addr
+= this_base
;
866 /* The previous frame's SP needed to be computed. Save the computed
868 trad_frame_set_value (info
->saved_regs
, HARD_SP_REGNUM
, info
->prev_sp
);
873 /* Given a GDB frame, determine the address of the calling function's
874 frame. This will be used to create a new GDB frame struct. */
877 m68hc11_frame_this_id (struct frame_info
*this_frame
,
878 void **this_prologue_cache
,
879 struct frame_id
*this_id
)
881 struct m68hc11_unwind_cache
*info
882 = m68hc11_frame_unwind_cache (this_frame
, this_prologue_cache
);
887 /* The FUNC is easy. */
888 func
= get_frame_func (this_frame
);
890 /* Hopefully the prologue analysis either correctly determined the
891 frame's base (which is the SP from the previous frame), or set
892 that base to "NULL". */
893 base
= info
->prev_sp
;
897 id
= frame_id_build (base
, func
);
901 static struct value
*
902 m68hc11_frame_prev_register (struct frame_info
*this_frame
,
903 void **this_prologue_cache
, int regnum
)
906 struct m68hc11_unwind_cache
*info
907 = m68hc11_frame_unwind_cache (this_frame
, this_prologue_cache
);
909 value
= trad_frame_get_prev_register (this_frame
, info
->saved_regs
, regnum
);
911 /* Take into account the 68HC12 specific call (PC + page). */
912 if (regnum
== HARD_PC_REGNUM
913 && info
->return_kind
== RETURN_RTC
914 && USE_PAGE_REGISTER (get_frame_arch (this_frame
)))
916 CORE_ADDR pc
= value_as_long (value
);
917 if (pc
>= 0x08000 && pc
< 0x0c000)
921 release_value (value
);
924 value
= trad_frame_get_prev_register (this_frame
, info
->saved_regs
,
926 page
= value_as_long (value
);
927 release_value (value
);
931 pc
+= ((page
& 0x0ff) << 14);
934 return frame_unwind_got_constant (this_frame
, regnum
, pc
);
941 static const struct frame_unwind m68hc11_frame_unwind
= {
943 m68hc11_frame_this_id
,
944 m68hc11_frame_prev_register
,
946 default_frame_sniffer
950 m68hc11_frame_base_address (struct frame_info
*this_frame
, void **this_cache
)
952 struct m68hc11_unwind_cache
*info
953 = m68hc11_frame_unwind_cache (this_frame
, this_cache
);
959 m68hc11_frame_args_address (struct frame_info
*this_frame
, void **this_cache
)
962 struct m68hc11_unwind_cache
*info
963 = m68hc11_frame_unwind_cache (this_frame
, this_cache
);
965 addr
= info
->base
+ info
->size
;
966 if (info
->return_kind
== RETURN_RTC
)
968 else if (info
->return_kind
== RETURN_RTI
)
974 static const struct frame_base m68hc11_frame_base
= {
975 &m68hc11_frame_unwind
,
976 m68hc11_frame_base_address
,
977 m68hc11_frame_base_address
,
978 m68hc11_frame_args_address
982 m68hc11_unwind_sp (struct gdbarch
*gdbarch
, struct frame_info
*next_frame
)
985 sp
= frame_unwind_register_unsigned (next_frame
, HARD_SP_REGNUM
);
989 /* Assuming THIS_FRAME is a dummy, return the frame ID of that dummy
990 frame. The frame ID's base needs to match the TOS value saved by
991 save_dummy_frame_tos(), and the PC match the dummy frame's breakpoint. */
993 static struct frame_id
994 m68hc11_dummy_id (struct gdbarch
*gdbarch
, struct frame_info
*this_frame
)
997 CORE_ADDR pc
= get_frame_pc (this_frame
);
999 tos
= get_frame_register_unsigned (this_frame
, SOFT_FP_REGNUM
);
1001 return frame_id_build (tos
, pc
);
1005 /* Get and print the register from the given frame. */
1007 m68hc11_print_register (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1008 struct frame_info
*frame
, int regno
)
1012 if (regno
== HARD_PC_REGNUM
|| regno
== HARD_SP_REGNUM
1013 || regno
== SOFT_FP_REGNUM
|| regno
== M68HC12_HARD_PC_REGNUM
)
1014 rval
= get_frame_register_unsigned (frame
, regno
);
1016 rval
= get_frame_register_signed (frame
, regno
);
1018 if (regno
== HARD_A_REGNUM
|| regno
== HARD_B_REGNUM
1019 || regno
== HARD_CCR_REGNUM
|| regno
== HARD_PAGE_REGNUM
)
1021 fprintf_filtered (file
, "0x%02x ", (unsigned char) rval
);
1022 if (regno
!= HARD_CCR_REGNUM
)
1023 print_longest (file
, 'd', 1, rval
);
1027 if (regno
== HARD_PC_REGNUM
&& gdbarch_tdep (gdbarch
)->use_page_register
)
1031 page
= get_frame_register_unsigned (frame
, HARD_PAGE_REGNUM
);
1032 fprintf_filtered (file
, "0x%02x:%04x ", (unsigned) page
,
1037 fprintf_filtered (file
, "0x%04x ", (unsigned) rval
);
1038 if (regno
!= HARD_PC_REGNUM
&& regno
!= HARD_SP_REGNUM
1039 && regno
!= SOFT_FP_REGNUM
&& regno
!= M68HC12_HARD_PC_REGNUM
)
1040 print_longest (file
, 'd', 1, rval
);
1044 if (regno
== HARD_CCR_REGNUM
)
1048 unsigned char l
= rval
& 0xff;
1050 fprintf_filtered (file
, "%c%c%c%c%c%c%c%c ",
1051 l
& M6811_S_BIT
? 'S' : '-',
1052 l
& M6811_X_BIT
? 'X' : '-',
1053 l
& M6811_H_BIT
? 'H' : '-',
1054 l
& M6811_I_BIT
? 'I' : '-',
1055 l
& M6811_N_BIT
? 'N' : '-',
1056 l
& M6811_Z_BIT
? 'Z' : '-',
1057 l
& M6811_V_BIT
? 'V' : '-',
1058 l
& M6811_C_BIT
? 'C' : '-');
1059 N
= (l
& M6811_N_BIT
) != 0;
1060 Z
= (l
& M6811_Z_BIT
) != 0;
1061 V
= (l
& M6811_V_BIT
) != 0;
1062 C
= (l
& M6811_C_BIT
) != 0;
1064 /* Print flags following the h8300 */
1066 fprintf_filtered (file
, "u> ");
1067 else if ((C
| Z
) == 1)
1068 fprintf_filtered (file
, "u<= ");
1070 fprintf_filtered (file
, "u< ");
1073 fprintf_filtered (file
, "!= ");
1075 fprintf_filtered (file
, "== ");
1078 fprintf_filtered (file
, ">= ");
1080 fprintf_filtered (file
, "< ");
1082 if ((Z
| (N
^ V
)) == 0)
1083 fprintf_filtered (file
, "> ");
1085 fprintf_filtered (file
, "<= ");
1089 /* Same as 'info reg' but prints the registers in a different way. */
1091 m68hc11_print_registers_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1092 struct frame_info
*frame
, int regno
, int cpregs
)
1096 const char *name
= gdbarch_register_name (gdbarch
, regno
);
1098 if (!name
|| !*name
)
1101 fprintf_filtered (file
, "%-10s ", name
);
1102 m68hc11_print_register (gdbarch
, file
, frame
, regno
);
1103 fprintf_filtered (file
, "\n");
1109 fprintf_filtered (file
, "PC=");
1110 m68hc11_print_register (gdbarch
, file
, frame
, HARD_PC_REGNUM
);
1112 fprintf_filtered (file
, " SP=");
1113 m68hc11_print_register (gdbarch
, file
, frame
, HARD_SP_REGNUM
);
1115 fprintf_filtered (file
, " FP=");
1116 m68hc11_print_register (gdbarch
, file
, frame
, SOFT_FP_REGNUM
);
1118 fprintf_filtered (file
, "\nCCR=");
1119 m68hc11_print_register (gdbarch
, file
, frame
, HARD_CCR_REGNUM
);
1121 fprintf_filtered (file
, "\nD=");
1122 m68hc11_print_register (gdbarch
, file
, frame
, HARD_D_REGNUM
);
1124 fprintf_filtered (file
, " X=");
1125 m68hc11_print_register (gdbarch
, file
, frame
, HARD_X_REGNUM
);
1127 fprintf_filtered (file
, " Y=");
1128 m68hc11_print_register (gdbarch
, file
, frame
, HARD_Y_REGNUM
);
1130 if (gdbarch_tdep (gdbarch
)->use_page_register
)
1132 fprintf_filtered (file
, "\nPage=");
1133 m68hc11_print_register (gdbarch
, file
, frame
, HARD_PAGE_REGNUM
);
1135 fprintf_filtered (file
, "\n");
1138 for (i
= SOFT_D1_REGNUM
; i
< M68HC11_ALL_REGS
; i
++)
1140 /* Skip registers which are not defined in the symbol table. */
1141 if (soft_regs
[i
].name
== 0)
1144 fprintf_filtered (file
, "D%d=", i
- SOFT_D1_REGNUM
+ 1);
1145 m68hc11_print_register (gdbarch
, file
, frame
, i
);
1148 fprintf_filtered (file
, "\n");
1150 fprintf_filtered (file
, " ");
1152 if (nr
&& (nr
% 8) != 7)
1153 fprintf_filtered (file
, "\n");
1158 m68hc11_push_dummy_call (struct gdbarch
*gdbarch
, struct value
*function
,
1159 struct regcache
*regcache
, CORE_ADDR bp_addr
,
1160 int nargs
, struct value
**args
, CORE_ADDR sp
,
1161 int struct_return
, CORE_ADDR struct_addr
)
1164 int first_stack_argnum
;
1170 first_stack_argnum
= 0;
1173 regcache_cooked_write_unsigned (regcache
, HARD_D_REGNUM
, struct_addr
);
1177 type
= value_type (args
[0]);
1178 len
= TYPE_LENGTH (type
);
1180 /* First argument is passed in D and X registers. */
1185 v
= extract_unsigned_integer (value_contents (args
[0]), len
);
1186 first_stack_argnum
= 1;
1188 regcache_cooked_write_unsigned (regcache
, HARD_D_REGNUM
, v
);
1192 regcache_cooked_write_unsigned (regcache
, HARD_X_REGNUM
, v
);
1197 for (argnum
= nargs
- 1; argnum
>= first_stack_argnum
; argnum
--)
1199 type
= value_type (args
[argnum
]);
1200 len
= TYPE_LENGTH (type
);
1204 static char zero
= 0;
1207 write_memory (sp
, &zero
, 1);
1209 val
= (char*) value_contents (args
[argnum
]);
1211 write_memory (sp
, val
, len
);
1214 /* Store return address. */
1216 store_unsigned_integer (buf
, 2, bp_addr
);
1217 write_memory (sp
, buf
, 2);
1219 /* Finally, update the stack pointer... */
1220 sp
-= STACK_CORRECTION (gdbarch
);
1221 regcache_cooked_write_unsigned (regcache
, HARD_SP_REGNUM
, sp
);
1223 /* ...and fake a frame pointer. */
1224 regcache_cooked_write_unsigned (regcache
, SOFT_FP_REGNUM
, sp
);
1226 /* DWARF2/GCC uses the stack address *before* the function call as a
1232 /* Return the GDB type object for the "standard" data type
1233 of data in register N. */
1235 static struct type
*
1236 m68hc11_register_type (struct gdbarch
*gdbarch
, int reg_nr
)
1240 case HARD_PAGE_REGNUM
:
1243 case HARD_CCR_REGNUM
:
1244 return builtin_type_uint8
;
1246 case M68HC12_HARD_PC_REGNUM
:
1247 return builtin_type_uint32
;
1250 return builtin_type_uint16
;
1255 m68hc11_store_return_value (struct type
*type
, struct regcache
*regcache
,
1260 len
= TYPE_LENGTH (type
);
1262 /* First argument is passed in D and X registers. */
1264 regcache_raw_write_part (regcache
, HARD_D_REGNUM
, 2 - len
, len
, valbuf
);
1267 regcache_raw_write_part (regcache
, HARD_X_REGNUM
, 4 - len
,
1269 regcache_raw_write (regcache
, HARD_D_REGNUM
, (char*) valbuf
+ (len
- 2));
1272 error (_("return of value > 4 is not supported."));
1276 /* Given a return value in `regcache' with a type `type',
1277 extract and copy its value into `valbuf'. */
1280 m68hc11_extract_return_value (struct type
*type
, struct regcache
*regcache
,
1283 int len
= TYPE_LENGTH (type
);
1284 char buf
[M68HC11_REG_SIZE
];
1286 regcache_raw_read (regcache
, HARD_D_REGNUM
, buf
);
1290 memcpy (valbuf
, buf
+ 1, 1);
1294 memcpy (valbuf
, buf
, 2);
1298 memcpy ((char*) valbuf
+ 1, buf
, 2);
1299 regcache_raw_read (regcache
, HARD_X_REGNUM
, buf
);
1300 memcpy (valbuf
, buf
+ 1, 1);
1304 memcpy ((char*) valbuf
+ 2, buf
, 2);
1305 regcache_raw_read (regcache
, HARD_X_REGNUM
, buf
);
1306 memcpy (valbuf
, buf
, 2);
1310 error (_("bad size for return value"));
1314 enum return_value_convention
1315 m68hc11_return_value (struct gdbarch
*gdbarch
, struct type
*func_type
,
1316 struct type
*valtype
, struct regcache
*regcache
,
1317 gdb_byte
*readbuf
, const gdb_byte
*writebuf
)
1319 if (TYPE_CODE (valtype
) == TYPE_CODE_STRUCT
1320 || TYPE_CODE (valtype
) == TYPE_CODE_UNION
1321 || TYPE_CODE (valtype
) == TYPE_CODE_ARRAY
1322 || TYPE_LENGTH (valtype
) > 4)
1323 return RETURN_VALUE_STRUCT_CONVENTION
;
1326 if (readbuf
!= NULL
)
1327 m68hc11_extract_return_value (valtype
, regcache
, readbuf
);
1328 if (writebuf
!= NULL
)
1329 m68hc11_store_return_value (valtype
, regcache
, writebuf
);
1330 return RETURN_VALUE_REGISTER_CONVENTION
;
1334 /* Test whether the ELF symbol corresponds to a function using rtc or
1338 m68hc11_elf_make_msymbol_special (asymbol
*sym
, struct minimal_symbol
*msym
)
1340 unsigned char flags
;
1342 flags
= ((elf_symbol_type
*)sym
)->internal_elf_sym
.st_other
;
1343 if (flags
& STO_M68HC12_FAR
)
1344 MSYMBOL_SET_RTC (msym
);
1345 if (flags
& STO_M68HC12_INTERRUPT
)
1346 MSYMBOL_SET_RTI (msym
);
1350 gdb_print_insn_m68hc11 (bfd_vma memaddr
, disassemble_info
*info
)
1352 if (gdbarch_bfd_arch_info (current_gdbarch
)->arch
== bfd_arch_m68hc11
)
1353 return print_insn_m68hc11 (memaddr
, info
);
1355 return print_insn_m68hc12 (memaddr
, info
);
1360 /* 68HC11/68HC12 register groups.
1361 Identify real hard registers and soft registers used by gcc. */
1363 static struct reggroup
*m68hc11_soft_reggroup
;
1364 static struct reggroup
*m68hc11_hard_reggroup
;
1367 m68hc11_init_reggroups (void)
1369 m68hc11_hard_reggroup
= reggroup_new ("hard", USER_REGGROUP
);
1370 m68hc11_soft_reggroup
= reggroup_new ("soft", USER_REGGROUP
);
1374 m68hc11_add_reggroups (struct gdbarch
*gdbarch
)
1376 reggroup_add (gdbarch
, m68hc11_hard_reggroup
);
1377 reggroup_add (gdbarch
, m68hc11_soft_reggroup
);
1378 reggroup_add (gdbarch
, general_reggroup
);
1379 reggroup_add (gdbarch
, float_reggroup
);
1380 reggroup_add (gdbarch
, all_reggroup
);
1381 reggroup_add (gdbarch
, save_reggroup
);
1382 reggroup_add (gdbarch
, restore_reggroup
);
1383 reggroup_add (gdbarch
, vector_reggroup
);
1384 reggroup_add (gdbarch
, system_reggroup
);
1388 m68hc11_register_reggroup_p (struct gdbarch
*gdbarch
, int regnum
,
1389 struct reggroup
*group
)
1391 /* We must save the real hard register as well as gcc
1392 soft registers including the frame pointer. */
1393 if (group
== save_reggroup
|| group
== restore_reggroup
)
1395 return (regnum
<= gdbarch_num_regs (gdbarch
)
1396 || ((regnum
== SOFT_FP_REGNUM
1397 || regnum
== SOFT_TMP_REGNUM
1398 || regnum
== SOFT_ZS_REGNUM
1399 || regnum
== SOFT_XY_REGNUM
)
1400 && m68hc11_register_name (gdbarch
, regnum
)));
1403 /* Group to identify gcc soft registers (d1..dN). */
1404 if (group
== m68hc11_soft_reggroup
)
1406 return regnum
>= SOFT_D1_REGNUM
1407 && m68hc11_register_name (gdbarch
, regnum
);
1410 if (group
== m68hc11_hard_reggroup
)
1412 return regnum
== HARD_PC_REGNUM
|| regnum
== HARD_SP_REGNUM
1413 || regnum
== HARD_X_REGNUM
|| regnum
== HARD_D_REGNUM
1414 || regnum
== HARD_Y_REGNUM
|| regnum
== HARD_CCR_REGNUM
;
1416 return default_register_reggroup_p (gdbarch
, regnum
, group
);
1419 static struct gdbarch
*
1420 m68hc11_gdbarch_init (struct gdbarch_info info
,
1421 struct gdbarch_list
*arches
)
1423 struct gdbarch
*gdbarch
;
1424 struct gdbarch_tdep
*tdep
;
1427 soft_reg_initialized
= 0;
1429 /* Extract the elf_flags if available. */
1430 if (info
.abfd
!= NULL
1431 && bfd_get_flavour (info
.abfd
) == bfd_target_elf_flavour
)
1432 elf_flags
= elf_elfheader (info
.abfd
)->e_flags
;
1436 /* try to find a pre-existing architecture */
1437 for (arches
= gdbarch_list_lookup_by_info (arches
, &info
);
1439 arches
= gdbarch_list_lookup_by_info (arches
->next
, &info
))
1441 if (gdbarch_tdep (arches
->gdbarch
)->elf_flags
!= elf_flags
)
1444 return arches
->gdbarch
;
1447 /* Need a new architecture. Fill in a target specific vector. */
1448 tdep
= (struct gdbarch_tdep
*) xmalloc (sizeof (struct gdbarch_tdep
));
1449 gdbarch
= gdbarch_alloc (&info
, tdep
);
1450 tdep
->elf_flags
= elf_flags
;
1452 switch (info
.bfd_arch_info
->arch
)
1454 case bfd_arch_m68hc11
:
1455 tdep
->stack_correction
= 1;
1456 tdep
->use_page_register
= 0;
1457 tdep
->prologue
= m6811_prologue
;
1458 set_gdbarch_addr_bit (gdbarch
, 16);
1459 set_gdbarch_num_pseudo_regs (gdbarch
, M68HC11_NUM_PSEUDO_REGS
);
1460 set_gdbarch_pc_regnum (gdbarch
, HARD_PC_REGNUM
);
1461 set_gdbarch_num_regs (gdbarch
, M68HC11_NUM_REGS
);
1464 case bfd_arch_m68hc12
:
1465 tdep
->stack_correction
= 0;
1466 tdep
->use_page_register
= elf_flags
& E_M68HC12_BANKS
;
1467 tdep
->prologue
= m6812_prologue
;
1468 set_gdbarch_addr_bit (gdbarch
, elf_flags
& E_M68HC12_BANKS
? 32 : 16);
1469 set_gdbarch_num_pseudo_regs (gdbarch
,
1470 elf_flags
& E_M68HC12_BANKS
1471 ? M68HC12_NUM_PSEUDO_REGS
1472 : M68HC11_NUM_PSEUDO_REGS
);
1473 set_gdbarch_pc_regnum (gdbarch
, elf_flags
& E_M68HC12_BANKS
1474 ? M68HC12_HARD_PC_REGNUM
: HARD_PC_REGNUM
);
1475 set_gdbarch_num_regs (gdbarch
, elf_flags
& E_M68HC12_BANKS
1476 ? M68HC12_NUM_REGS
: M68HC11_NUM_REGS
);
1483 /* Initially set everything according to the ABI.
1484 Use 16-bit integers since it will be the case for most
1485 programs. The size of these types should normally be set
1486 according to the dwarf2 debug information. */
1487 set_gdbarch_short_bit (gdbarch
, 16);
1488 set_gdbarch_int_bit (gdbarch
, elf_flags
& E_M68HC11_I32
? 32 : 16);
1489 set_gdbarch_float_bit (gdbarch
, 32);
1490 set_gdbarch_double_bit (gdbarch
, elf_flags
& E_M68HC11_F64
? 64 : 32);
1491 set_gdbarch_long_double_bit (gdbarch
, 64);
1492 set_gdbarch_long_bit (gdbarch
, 32);
1493 set_gdbarch_ptr_bit (gdbarch
, 16);
1494 set_gdbarch_long_long_bit (gdbarch
, 64);
1496 /* Characters are unsigned. */
1497 set_gdbarch_char_signed (gdbarch
, 0);
1499 set_gdbarch_unwind_pc (gdbarch
, m68hc11_unwind_pc
);
1500 set_gdbarch_unwind_sp (gdbarch
, m68hc11_unwind_sp
);
1502 /* Set register info. */
1503 set_gdbarch_fp0_regnum (gdbarch
, -1);
1505 set_gdbarch_sp_regnum (gdbarch
, HARD_SP_REGNUM
);
1506 set_gdbarch_register_name (gdbarch
, m68hc11_register_name
);
1507 set_gdbarch_register_type (gdbarch
, m68hc11_register_type
);
1508 set_gdbarch_pseudo_register_read (gdbarch
, m68hc11_pseudo_register_read
);
1509 set_gdbarch_pseudo_register_write (gdbarch
, m68hc11_pseudo_register_write
);
1511 set_gdbarch_push_dummy_call (gdbarch
, m68hc11_push_dummy_call
);
1513 set_gdbarch_return_value (gdbarch
, m68hc11_return_value
);
1514 set_gdbarch_skip_prologue (gdbarch
, m68hc11_skip_prologue
);
1515 set_gdbarch_inner_than (gdbarch
, core_addr_lessthan
);
1516 set_gdbarch_breakpoint_from_pc (gdbarch
, m68hc11_breakpoint_from_pc
);
1517 set_gdbarch_print_insn (gdbarch
, gdb_print_insn_m68hc11
);
1519 m68hc11_add_reggroups (gdbarch
);
1520 set_gdbarch_register_reggroup_p (gdbarch
, m68hc11_register_reggroup_p
);
1521 set_gdbarch_print_registers_info (gdbarch
, m68hc11_print_registers_info
);
1523 /* Hook in the DWARF CFI frame unwinder. */
1524 dwarf2_append_unwinders (gdbarch
);
1526 frame_unwind_append_unwinder (gdbarch
, &m68hc11_frame_unwind
);
1527 frame_base_set_default (gdbarch
, &m68hc11_frame_base
);
1529 /* Methods for saving / extracting a dummy frame's ID. The ID's
1530 stack address must match the SP value returned by
1531 PUSH_DUMMY_CALL, and saved by generic_save_dummy_frame_tos. */
1532 set_gdbarch_dummy_id (gdbarch
, m68hc11_dummy_id
);
1534 /* Return the unwound PC value. */
1535 set_gdbarch_unwind_pc (gdbarch
, m68hc11_unwind_pc
);
1537 /* Minsymbol frobbing. */
1538 set_gdbarch_elf_make_msymbol_special (gdbarch
,
1539 m68hc11_elf_make_msymbol_special
);
1541 set_gdbarch_believe_pcc_promotion (gdbarch
, 1);
1546 extern initialize_file_ftype _initialize_m68hc11_tdep
; /* -Wmissing-prototypes */
1549 _initialize_m68hc11_tdep (void)
1551 register_gdbarch_init (bfd_arch_m68hc11
, m68hc11_gdbarch_init
);
1552 register_gdbarch_init (bfd_arch_m68hc12
, m68hc11_gdbarch_init
);
1553 m68hc11_init_reggroups ();