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
*next_frame
,
778 void **this_prologue_cache
)
780 struct gdbarch
*gdbarch
= get_frame_arch (next_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 (next_frame
);
794 info
->pc
= frame_func_unwind (next_frame
, NORMAL_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
= frame_unwind_register_unsigned (next_frame
, SOFT_FP_REGNUM
);
809 current_pc
= frame_pc_unwind (next_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
= frame_unwind_register_unsigned (next_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
*next_frame
,
878 void **this_prologue_cache
,
879 struct frame_id
*this_id
)
881 struct m68hc11_unwind_cache
*info
882 = m68hc11_frame_unwind_cache (next_frame
, this_prologue_cache
);
887 /* The FUNC is easy. */
888 func
= frame_func_unwind (next_frame
, NORMAL_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
);
902 m68hc11_frame_prev_register (struct frame_info
*next_frame
,
903 void **this_prologue_cache
,
904 int regnum
, int *optimizedp
,
905 enum lval_type
*lvalp
, CORE_ADDR
*addrp
,
906 int *realnump
, gdb_byte
*bufferp
)
908 struct m68hc11_unwind_cache
*info
909 = m68hc11_frame_unwind_cache (next_frame
, this_prologue_cache
);
911 trad_frame_get_prev_register (next_frame
, info
->saved_regs
, regnum
,
912 optimizedp
, lvalp
, addrp
, realnump
, bufferp
);
914 if (regnum
== HARD_PC_REGNUM
)
916 /* Take into account the 68HC12 specific call (PC + page). */
917 if (info
->return_kind
== RETURN_RTC
918 && *addrp
>= 0x08000 && *addrp
< 0x0c000
919 && USE_PAGE_REGISTER (get_frame_arch (next_frame
)))
925 trad_frame_get_prev_register (next_frame
, info
->saved_regs
,
926 HARD_PAGE_REGNUM
, &page_optimized
,
929 *addrp
+= ((page
& 0x0ff) << 14);
935 static const struct frame_unwind m68hc11_frame_unwind
= {
937 m68hc11_frame_this_id
,
938 m68hc11_frame_prev_register
941 const struct frame_unwind
*
942 m68hc11_frame_sniffer (struct frame_info
*next_frame
)
944 return &m68hc11_frame_unwind
;
948 m68hc11_frame_base_address (struct frame_info
*next_frame
, void **this_cache
)
950 struct m68hc11_unwind_cache
*info
951 = m68hc11_frame_unwind_cache (next_frame
, this_cache
);
957 m68hc11_frame_args_address (struct frame_info
*next_frame
, void **this_cache
)
960 struct m68hc11_unwind_cache
*info
961 = m68hc11_frame_unwind_cache (next_frame
, this_cache
);
963 addr
= info
->base
+ info
->size
;
964 if (info
->return_kind
== RETURN_RTC
)
966 else if (info
->return_kind
== RETURN_RTI
)
972 static const struct frame_base m68hc11_frame_base
= {
973 &m68hc11_frame_unwind
,
974 m68hc11_frame_base_address
,
975 m68hc11_frame_base_address
,
976 m68hc11_frame_args_address
980 m68hc11_unwind_sp (struct gdbarch
*gdbarch
, struct frame_info
*next_frame
)
983 sp
= frame_unwind_register_unsigned (next_frame
, HARD_SP_REGNUM
);
987 /* Assuming NEXT_FRAME->prev is a dummy, return the frame ID of that
988 dummy frame. The frame ID's base needs to match the TOS value
989 saved by save_dummy_frame_tos(), and the PC match the dummy frame's
992 static struct frame_id
993 m68hc11_unwind_dummy_id (struct gdbarch
*gdbarch
, struct frame_info
*next_frame
)
996 CORE_ADDR pc
= frame_pc_unwind (next_frame
);
998 tos
= frame_unwind_register_unsigned (next_frame
, SOFT_FP_REGNUM
);
1000 return frame_id_build (tos
, pc
);
1004 /* Get and print the register from the given frame. */
1006 m68hc11_print_register (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1007 struct frame_info
*frame
, int regno
)
1011 if (regno
== HARD_PC_REGNUM
|| regno
== HARD_SP_REGNUM
1012 || regno
== SOFT_FP_REGNUM
|| regno
== M68HC12_HARD_PC_REGNUM
)
1013 rval
= get_frame_register_unsigned (frame
, regno
);
1015 rval
= get_frame_register_signed (frame
, regno
);
1017 if (regno
== HARD_A_REGNUM
|| regno
== HARD_B_REGNUM
1018 || regno
== HARD_CCR_REGNUM
|| regno
== HARD_PAGE_REGNUM
)
1020 fprintf_filtered (file
, "0x%02x ", (unsigned char) rval
);
1021 if (regno
!= HARD_CCR_REGNUM
)
1022 print_longest (file
, 'd', 1, rval
);
1026 if (regno
== HARD_PC_REGNUM
&& gdbarch_tdep (gdbarch
)->use_page_register
)
1030 page
= get_frame_register_unsigned (frame
, HARD_PAGE_REGNUM
);
1031 fprintf_filtered (file
, "0x%02x:%04x ", (unsigned) page
,
1036 fprintf_filtered (file
, "0x%04x ", (unsigned) rval
);
1037 if (regno
!= HARD_PC_REGNUM
&& regno
!= HARD_SP_REGNUM
1038 && regno
!= SOFT_FP_REGNUM
&& regno
!= M68HC12_HARD_PC_REGNUM
)
1039 print_longest (file
, 'd', 1, rval
);
1043 if (regno
== HARD_CCR_REGNUM
)
1047 unsigned char l
= rval
& 0xff;
1049 fprintf_filtered (file
, "%c%c%c%c%c%c%c%c ",
1050 l
& M6811_S_BIT
? 'S' : '-',
1051 l
& M6811_X_BIT
? 'X' : '-',
1052 l
& M6811_H_BIT
? 'H' : '-',
1053 l
& M6811_I_BIT
? 'I' : '-',
1054 l
& M6811_N_BIT
? 'N' : '-',
1055 l
& M6811_Z_BIT
? 'Z' : '-',
1056 l
& M6811_V_BIT
? 'V' : '-',
1057 l
& M6811_C_BIT
? 'C' : '-');
1058 N
= (l
& M6811_N_BIT
) != 0;
1059 Z
= (l
& M6811_Z_BIT
) != 0;
1060 V
= (l
& M6811_V_BIT
) != 0;
1061 C
= (l
& M6811_C_BIT
) != 0;
1063 /* Print flags following the h8300 */
1065 fprintf_filtered (file
, "u> ");
1066 else if ((C
| Z
) == 1)
1067 fprintf_filtered (file
, "u<= ");
1069 fprintf_filtered (file
, "u< ");
1072 fprintf_filtered (file
, "!= ");
1074 fprintf_filtered (file
, "== ");
1077 fprintf_filtered (file
, ">= ");
1079 fprintf_filtered (file
, "< ");
1081 if ((Z
| (N
^ V
)) == 0)
1082 fprintf_filtered (file
, "> ");
1084 fprintf_filtered (file
, "<= ");
1088 /* Same as 'info reg' but prints the registers in a different way. */
1090 m68hc11_print_registers_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1091 struct frame_info
*frame
, int regno
, int cpregs
)
1095 const char *name
= gdbarch_register_name (gdbarch
, regno
);
1097 if (!name
|| !*name
)
1100 fprintf_filtered (file
, "%-10s ", name
);
1101 m68hc11_print_register (gdbarch
, file
, frame
, regno
);
1102 fprintf_filtered (file
, "\n");
1108 fprintf_filtered (file
, "PC=");
1109 m68hc11_print_register (gdbarch
, file
, frame
, HARD_PC_REGNUM
);
1111 fprintf_filtered (file
, " SP=");
1112 m68hc11_print_register (gdbarch
, file
, frame
, HARD_SP_REGNUM
);
1114 fprintf_filtered (file
, " FP=");
1115 m68hc11_print_register (gdbarch
, file
, frame
, SOFT_FP_REGNUM
);
1117 fprintf_filtered (file
, "\nCCR=");
1118 m68hc11_print_register (gdbarch
, file
, frame
, HARD_CCR_REGNUM
);
1120 fprintf_filtered (file
, "\nD=");
1121 m68hc11_print_register (gdbarch
, file
, frame
, HARD_D_REGNUM
);
1123 fprintf_filtered (file
, " X=");
1124 m68hc11_print_register (gdbarch
, file
, frame
, HARD_X_REGNUM
);
1126 fprintf_filtered (file
, " Y=");
1127 m68hc11_print_register (gdbarch
, file
, frame
, HARD_Y_REGNUM
);
1129 if (gdbarch_tdep (gdbarch
)->use_page_register
)
1131 fprintf_filtered (file
, "\nPage=");
1132 m68hc11_print_register (gdbarch
, file
, frame
, HARD_PAGE_REGNUM
);
1134 fprintf_filtered (file
, "\n");
1137 for (i
= SOFT_D1_REGNUM
; i
< M68HC11_ALL_REGS
; i
++)
1139 /* Skip registers which are not defined in the symbol table. */
1140 if (soft_regs
[i
].name
== 0)
1143 fprintf_filtered (file
, "D%d=", i
- SOFT_D1_REGNUM
+ 1);
1144 m68hc11_print_register (gdbarch
, file
, frame
, i
);
1147 fprintf_filtered (file
, "\n");
1149 fprintf_filtered (file
, " ");
1151 if (nr
&& (nr
% 8) != 7)
1152 fprintf_filtered (file
, "\n");
1157 m68hc11_push_dummy_call (struct gdbarch
*gdbarch
, struct value
*function
,
1158 struct regcache
*regcache
, CORE_ADDR bp_addr
,
1159 int nargs
, struct value
**args
, CORE_ADDR sp
,
1160 int struct_return
, CORE_ADDR struct_addr
)
1163 int first_stack_argnum
;
1169 first_stack_argnum
= 0;
1172 regcache_cooked_write_unsigned (regcache
, HARD_D_REGNUM
, struct_addr
);
1176 type
= value_type (args
[0]);
1177 len
= TYPE_LENGTH (type
);
1179 /* First argument is passed in D and X registers. */
1184 v
= extract_unsigned_integer (value_contents (args
[0]), len
);
1185 first_stack_argnum
= 1;
1187 regcache_cooked_write_unsigned (regcache
, HARD_D_REGNUM
, v
);
1191 regcache_cooked_write_unsigned (regcache
, HARD_X_REGNUM
, v
);
1196 for (argnum
= nargs
- 1; argnum
>= first_stack_argnum
; argnum
--)
1198 type
= value_type (args
[argnum
]);
1199 len
= TYPE_LENGTH (type
);
1203 static char zero
= 0;
1206 write_memory (sp
, &zero
, 1);
1208 val
= (char*) value_contents (args
[argnum
]);
1210 write_memory (sp
, val
, len
);
1213 /* Store return address. */
1215 store_unsigned_integer (buf
, 2, bp_addr
);
1216 write_memory (sp
, buf
, 2);
1218 /* Finally, update the stack pointer... */
1219 sp
-= STACK_CORRECTION (gdbarch
);
1220 regcache_cooked_write_unsigned (regcache
, HARD_SP_REGNUM
, sp
);
1222 /* ...and fake a frame pointer. */
1223 regcache_cooked_write_unsigned (regcache
, SOFT_FP_REGNUM
, sp
);
1225 /* DWARF2/GCC uses the stack address *before* the function call as a
1231 /* Return the GDB type object for the "standard" data type
1232 of data in register N. */
1234 static struct type
*
1235 m68hc11_register_type (struct gdbarch
*gdbarch
, int reg_nr
)
1239 case HARD_PAGE_REGNUM
:
1242 case HARD_CCR_REGNUM
:
1243 return builtin_type_uint8
;
1245 case M68HC12_HARD_PC_REGNUM
:
1246 return builtin_type_uint32
;
1249 return builtin_type_uint16
;
1254 m68hc11_store_return_value (struct type
*type
, struct regcache
*regcache
,
1259 len
= TYPE_LENGTH (type
);
1261 /* First argument is passed in D and X registers. */
1263 regcache_raw_write_part (regcache
, HARD_D_REGNUM
, 2 - len
, len
, valbuf
);
1266 regcache_raw_write_part (regcache
, HARD_X_REGNUM
, 4 - len
,
1268 regcache_raw_write (regcache
, HARD_D_REGNUM
, (char*) valbuf
+ (len
- 2));
1271 error (_("return of value > 4 is not supported."));
1275 /* Given a return value in `regcache' with a type `type',
1276 extract and copy its value into `valbuf'. */
1279 m68hc11_extract_return_value (struct type
*type
, struct regcache
*regcache
,
1282 int len
= TYPE_LENGTH (type
);
1283 char buf
[M68HC11_REG_SIZE
];
1285 regcache_raw_read (regcache
, HARD_D_REGNUM
, buf
);
1289 memcpy (valbuf
, buf
+ 1, 1);
1293 memcpy (valbuf
, buf
, 2);
1297 memcpy ((char*) valbuf
+ 1, buf
, 2);
1298 regcache_raw_read (regcache
, HARD_X_REGNUM
, buf
);
1299 memcpy (valbuf
, buf
+ 1, 1);
1303 memcpy ((char*) valbuf
+ 2, buf
, 2);
1304 regcache_raw_read (regcache
, HARD_X_REGNUM
, buf
);
1305 memcpy (valbuf
, buf
, 2);
1309 error (_("bad size for return value"));
1313 enum return_value_convention
1314 m68hc11_return_value (struct gdbarch
*gdbarch
, struct type
*func_type
,
1315 struct type
*valtype
, struct regcache
*regcache
,
1316 gdb_byte
*readbuf
, const gdb_byte
*writebuf
)
1318 if (TYPE_CODE (valtype
) == TYPE_CODE_STRUCT
1319 || TYPE_CODE (valtype
) == TYPE_CODE_UNION
1320 || TYPE_CODE (valtype
) == TYPE_CODE_ARRAY
1321 || TYPE_LENGTH (valtype
) > 4)
1322 return RETURN_VALUE_STRUCT_CONVENTION
;
1325 if (readbuf
!= NULL
)
1326 m68hc11_extract_return_value (valtype
, regcache
, readbuf
);
1327 if (writebuf
!= NULL
)
1328 m68hc11_store_return_value (valtype
, regcache
, writebuf
);
1329 return RETURN_VALUE_REGISTER_CONVENTION
;
1333 /* Test whether the ELF symbol corresponds to a function using rtc or
1337 m68hc11_elf_make_msymbol_special (asymbol
*sym
, struct minimal_symbol
*msym
)
1339 unsigned char flags
;
1341 flags
= ((elf_symbol_type
*)sym
)->internal_elf_sym
.st_other
;
1342 if (flags
& STO_M68HC12_FAR
)
1343 MSYMBOL_SET_RTC (msym
);
1344 if (flags
& STO_M68HC12_INTERRUPT
)
1345 MSYMBOL_SET_RTI (msym
);
1349 gdb_print_insn_m68hc11 (bfd_vma memaddr
, disassemble_info
*info
)
1351 if (gdbarch_bfd_arch_info (current_gdbarch
)->arch
== bfd_arch_m68hc11
)
1352 return print_insn_m68hc11 (memaddr
, info
);
1354 return print_insn_m68hc12 (memaddr
, info
);
1359 /* 68HC11/68HC12 register groups.
1360 Identify real hard registers and soft registers used by gcc. */
1362 static struct reggroup
*m68hc11_soft_reggroup
;
1363 static struct reggroup
*m68hc11_hard_reggroup
;
1366 m68hc11_init_reggroups (void)
1368 m68hc11_hard_reggroup
= reggroup_new ("hard", USER_REGGROUP
);
1369 m68hc11_soft_reggroup
= reggroup_new ("soft", USER_REGGROUP
);
1373 m68hc11_add_reggroups (struct gdbarch
*gdbarch
)
1375 reggroup_add (gdbarch
, m68hc11_hard_reggroup
);
1376 reggroup_add (gdbarch
, m68hc11_soft_reggroup
);
1377 reggroup_add (gdbarch
, general_reggroup
);
1378 reggroup_add (gdbarch
, float_reggroup
);
1379 reggroup_add (gdbarch
, all_reggroup
);
1380 reggroup_add (gdbarch
, save_reggroup
);
1381 reggroup_add (gdbarch
, restore_reggroup
);
1382 reggroup_add (gdbarch
, vector_reggroup
);
1383 reggroup_add (gdbarch
, system_reggroup
);
1387 m68hc11_register_reggroup_p (struct gdbarch
*gdbarch
, int regnum
,
1388 struct reggroup
*group
)
1390 /* We must save the real hard register as well as gcc
1391 soft registers including the frame pointer. */
1392 if (group
== save_reggroup
|| group
== restore_reggroup
)
1394 return (regnum
<= gdbarch_num_regs (gdbarch
)
1395 || ((regnum
== SOFT_FP_REGNUM
1396 || regnum
== SOFT_TMP_REGNUM
1397 || regnum
== SOFT_ZS_REGNUM
1398 || regnum
== SOFT_XY_REGNUM
)
1399 && m68hc11_register_name (gdbarch
, regnum
)));
1402 /* Group to identify gcc soft registers (d1..dN). */
1403 if (group
== m68hc11_soft_reggroup
)
1405 return regnum
>= SOFT_D1_REGNUM
1406 && m68hc11_register_name (gdbarch
, regnum
);
1409 if (group
== m68hc11_hard_reggroup
)
1411 return regnum
== HARD_PC_REGNUM
|| regnum
== HARD_SP_REGNUM
1412 || regnum
== HARD_X_REGNUM
|| regnum
== HARD_D_REGNUM
1413 || regnum
== HARD_Y_REGNUM
|| regnum
== HARD_CCR_REGNUM
;
1415 return default_register_reggroup_p (gdbarch
, regnum
, group
);
1418 static struct gdbarch
*
1419 m68hc11_gdbarch_init (struct gdbarch_info info
,
1420 struct gdbarch_list
*arches
)
1422 struct gdbarch
*gdbarch
;
1423 struct gdbarch_tdep
*tdep
;
1426 soft_reg_initialized
= 0;
1428 /* Extract the elf_flags if available. */
1429 if (info
.abfd
!= NULL
1430 && bfd_get_flavour (info
.abfd
) == bfd_target_elf_flavour
)
1431 elf_flags
= elf_elfheader (info
.abfd
)->e_flags
;
1435 /* try to find a pre-existing architecture */
1436 for (arches
= gdbarch_list_lookup_by_info (arches
, &info
);
1438 arches
= gdbarch_list_lookup_by_info (arches
->next
, &info
))
1440 if (gdbarch_tdep (arches
->gdbarch
)->elf_flags
!= elf_flags
)
1443 return arches
->gdbarch
;
1446 /* Need a new architecture. Fill in a target specific vector. */
1447 tdep
= (struct gdbarch_tdep
*) xmalloc (sizeof (struct gdbarch_tdep
));
1448 gdbarch
= gdbarch_alloc (&info
, tdep
);
1449 tdep
->elf_flags
= elf_flags
;
1451 switch (info
.bfd_arch_info
->arch
)
1453 case bfd_arch_m68hc11
:
1454 tdep
->stack_correction
= 1;
1455 tdep
->use_page_register
= 0;
1456 tdep
->prologue
= m6811_prologue
;
1457 set_gdbarch_addr_bit (gdbarch
, 16);
1458 set_gdbarch_num_pseudo_regs (gdbarch
, M68HC11_NUM_PSEUDO_REGS
);
1459 set_gdbarch_pc_regnum (gdbarch
, HARD_PC_REGNUM
);
1460 set_gdbarch_num_regs (gdbarch
, M68HC11_NUM_REGS
);
1463 case bfd_arch_m68hc12
:
1464 tdep
->stack_correction
= 0;
1465 tdep
->use_page_register
= elf_flags
& E_M68HC12_BANKS
;
1466 tdep
->prologue
= m6812_prologue
;
1467 set_gdbarch_addr_bit (gdbarch
, elf_flags
& E_M68HC12_BANKS
? 32 : 16);
1468 set_gdbarch_num_pseudo_regs (gdbarch
,
1469 elf_flags
& E_M68HC12_BANKS
1470 ? M68HC12_NUM_PSEUDO_REGS
1471 : M68HC11_NUM_PSEUDO_REGS
);
1472 set_gdbarch_pc_regnum (gdbarch
, elf_flags
& E_M68HC12_BANKS
1473 ? M68HC12_HARD_PC_REGNUM
: HARD_PC_REGNUM
);
1474 set_gdbarch_num_regs (gdbarch
, elf_flags
& E_M68HC12_BANKS
1475 ? M68HC12_NUM_REGS
: M68HC11_NUM_REGS
);
1482 /* Initially set everything according to the ABI.
1483 Use 16-bit integers since it will be the case for most
1484 programs. The size of these types should normally be set
1485 according to the dwarf2 debug information. */
1486 set_gdbarch_short_bit (gdbarch
, 16);
1487 set_gdbarch_int_bit (gdbarch
, elf_flags
& E_M68HC11_I32
? 32 : 16);
1488 set_gdbarch_float_bit (gdbarch
, 32);
1489 set_gdbarch_double_bit (gdbarch
, elf_flags
& E_M68HC11_F64
? 64 : 32);
1490 set_gdbarch_long_double_bit (gdbarch
, 64);
1491 set_gdbarch_long_bit (gdbarch
, 32);
1492 set_gdbarch_ptr_bit (gdbarch
, 16);
1493 set_gdbarch_long_long_bit (gdbarch
, 64);
1495 /* Characters are unsigned. */
1496 set_gdbarch_char_signed (gdbarch
, 0);
1498 set_gdbarch_unwind_pc (gdbarch
, m68hc11_unwind_pc
);
1499 set_gdbarch_unwind_sp (gdbarch
, m68hc11_unwind_sp
);
1501 /* Set register info. */
1502 set_gdbarch_fp0_regnum (gdbarch
, -1);
1504 set_gdbarch_sp_regnum (gdbarch
, HARD_SP_REGNUM
);
1505 set_gdbarch_register_name (gdbarch
, m68hc11_register_name
);
1506 set_gdbarch_register_type (gdbarch
, m68hc11_register_type
);
1507 set_gdbarch_pseudo_register_read (gdbarch
, m68hc11_pseudo_register_read
);
1508 set_gdbarch_pseudo_register_write (gdbarch
, m68hc11_pseudo_register_write
);
1510 set_gdbarch_push_dummy_call (gdbarch
, m68hc11_push_dummy_call
);
1512 set_gdbarch_return_value (gdbarch
, m68hc11_return_value
);
1513 set_gdbarch_skip_prologue (gdbarch
, m68hc11_skip_prologue
);
1514 set_gdbarch_inner_than (gdbarch
, core_addr_lessthan
);
1515 set_gdbarch_breakpoint_from_pc (gdbarch
, m68hc11_breakpoint_from_pc
);
1516 set_gdbarch_print_insn (gdbarch
, gdb_print_insn_m68hc11
);
1518 m68hc11_add_reggroups (gdbarch
);
1519 set_gdbarch_register_reggroup_p (gdbarch
, m68hc11_register_reggroup_p
);
1520 set_gdbarch_print_registers_info (gdbarch
, m68hc11_print_registers_info
);
1522 /* Hook in the DWARF CFI frame unwinder. */
1523 frame_unwind_append_sniffer (gdbarch
, dwarf2_frame_sniffer
);
1525 frame_unwind_append_sniffer (gdbarch
, m68hc11_frame_sniffer
);
1526 frame_base_set_default (gdbarch
, &m68hc11_frame_base
);
1528 /* Methods for saving / extracting a dummy frame's ID. The ID's
1529 stack address must match the SP value returned by
1530 PUSH_DUMMY_CALL, and saved by generic_save_dummy_frame_tos. */
1531 set_gdbarch_unwind_dummy_id (gdbarch
, m68hc11_unwind_dummy_id
);
1533 /* Return the unwound PC value. */
1534 set_gdbarch_unwind_pc (gdbarch
, m68hc11_unwind_pc
);
1536 /* Minsymbol frobbing. */
1537 set_gdbarch_elf_make_msymbol_special (gdbarch
,
1538 m68hc11_elf_make_msymbol_special
);
1540 set_gdbarch_believe_pcc_promotion (gdbarch
, 1);
1545 extern initialize_file_ftype _initialize_m68hc11_tdep
; /* -Wmissing-prototypes */
1548 _initialize_m68hc11_tdep (void)
1550 register_gdbarch_init (bfd_arch_m68hc11
, m68hc11_gdbarch_init
);
1551 register_gdbarch_init (bfd_arch_m68hc12
, m68hc11_gdbarch_init
);
1552 m68hc11_init_reggroups ();