1 /* Target-dependent code for Motorola 68HC11 & 68HC12
3 Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007
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 2 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, write to the Free Software
22 Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 Boston, MA 02110-1301, USA. */
28 #include "frame-unwind.h"
29 #include "frame-base.h"
30 #include "dwarf2-frame.h"
31 #include "trad-frame.h"
36 #include "gdb_string.h"
42 #include "arch-utils.h"
44 #include "reggroups.h"
47 #include "opcode/m68hc11.h"
48 #include "elf/m68hc11.h"
51 /* Macros for setting and testing a bit in a minimal symbol.
52 For 68HC11/68HC12 we have two flags that tell which return
53 type the function is using. This is used for prologue and frame
54 analysis to compute correct stack frame layout.
56 The MSB of the minimal symbol's "info" field is used for this purpose.
58 MSYMBOL_SET_RTC Actually sets the "RTC" bit.
59 MSYMBOL_SET_RTI Actually sets the "RTI" bit.
60 MSYMBOL_IS_RTC Tests the "RTC" bit in a minimal symbol.
61 MSYMBOL_IS_RTI Tests the "RTC" bit in a minimal symbol. */
63 #define MSYMBOL_SET_RTC(msym) \
64 MSYMBOL_INFO (msym) = (char *) (((long) MSYMBOL_INFO (msym)) \
67 #define MSYMBOL_SET_RTI(msym) \
68 MSYMBOL_INFO (msym) = (char *) (((long) MSYMBOL_INFO (msym)) \
71 #define MSYMBOL_IS_RTC(msym) \
72 (((long) MSYMBOL_INFO (msym) & 0x80000000) != 0)
74 #define MSYMBOL_IS_RTI(msym) \
75 (((long) MSYMBOL_INFO (msym) & 0x40000000) != 0)
77 enum insn_return_kind
{
84 /* Register numbers of various important registers. */
86 #define HARD_X_REGNUM 0
87 #define HARD_D_REGNUM 1
88 #define HARD_Y_REGNUM 2
89 #define HARD_SP_REGNUM 3
90 #define HARD_PC_REGNUM 4
92 #define HARD_A_REGNUM 5
93 #define HARD_B_REGNUM 6
94 #define HARD_CCR_REGNUM 7
96 /* 68HC12 page number register.
97 Note: to keep a compatibility with gcc register naming, we must
98 not have to rename FP and other soft registers. The page register
99 is a real hard register and must therefore be counted by gdbarch_num_regs.
100 For this it has the same number as Z register (which is not used). */
101 #define HARD_PAGE_REGNUM 8
102 #define M68HC11_LAST_HARD_REG (HARD_PAGE_REGNUM)
104 /* Z is replaced by X or Y by gcc during machine reorg.
105 ??? There is no way to get it and even know whether
106 it's in X or Y or in ZS. */
107 #define SOFT_Z_REGNUM 8
109 /* Soft registers. These registers are special. There are treated
110 like normal hard registers by gcc and gdb (ie, within dwarf2 info).
111 They are physically located in memory. */
112 #define SOFT_FP_REGNUM 9
113 #define SOFT_TMP_REGNUM 10
114 #define SOFT_ZS_REGNUM 11
115 #define SOFT_XY_REGNUM 12
116 #define SOFT_UNUSED_REGNUM 13
117 #define SOFT_D1_REGNUM 14
118 #define SOFT_D32_REGNUM (SOFT_D1_REGNUM+31)
119 #define M68HC11_MAX_SOFT_REGS 32
121 #define M68HC11_NUM_REGS (8)
122 #define M68HC11_NUM_PSEUDO_REGS (M68HC11_MAX_SOFT_REGS+5)
123 #define M68HC11_ALL_REGS (M68HC11_NUM_REGS+M68HC11_NUM_PSEUDO_REGS)
125 #define M68HC11_REG_SIZE (2)
127 #define M68HC12_NUM_REGS (9)
128 #define M68HC12_NUM_PSEUDO_REGS ((M68HC11_MAX_SOFT_REGS+5)+1-1)
129 #define M68HC12_HARD_PC_REGNUM (SOFT_D32_REGNUM+1)
131 struct insn_sequence
;
134 /* Stack pointer correction value. For 68hc11, the stack pointer points
135 to the next push location. An offset of 1 must be applied to obtain
136 the address where the last value is saved. For 68hc12, the stack
137 pointer points to the last value pushed. No offset is necessary. */
138 int stack_correction
;
140 /* Description of instructions in the prologue. */
141 struct insn_sequence
*prologue
;
143 /* True if the page memory bank register is available
145 int use_page_register
;
147 /* ELF flags for ABI. */
151 #define M6811_TDEP gdbarch_tdep (current_gdbarch)
152 #define STACK_CORRECTION (M6811_TDEP->stack_correction)
153 #define USE_PAGE_REGISTER (M6811_TDEP->use_page_register)
155 struct m68hc11_unwind_cache
157 /* The previous frame's inner most stack address. Used as this
158 frame ID's stack_addr. */
160 /* The frame's base, optionally used by the high-level debug info. */
168 enum insn_return_kind return_kind
;
170 /* Table indicating the location of each and every register. */
171 struct trad_frame_saved_reg
*saved_regs
;
174 /* Table of registers for 68HC11. This includes the hard registers
175 and the soft registers used by GCC. */
177 m68hc11_register_names
[] =
179 "x", "d", "y", "sp", "pc", "a", "b",
180 "ccr", "page", "frame","tmp", "zs", "xy", 0,
181 "d1", "d2", "d3", "d4", "d5", "d6", "d7",
182 "d8", "d9", "d10", "d11", "d12", "d13", "d14",
183 "d15", "d16", "d17", "d18", "d19", "d20", "d21",
184 "d22", "d23", "d24", "d25", "d26", "d27", "d28",
185 "d29", "d30", "d31", "d32"
188 struct m68hc11_soft_reg
194 static struct m68hc11_soft_reg soft_regs
[M68HC11_ALL_REGS
];
196 #define M68HC11_FP_ADDR soft_regs[SOFT_FP_REGNUM].addr
198 static int soft_min_addr
;
199 static int soft_max_addr
;
200 static int soft_reg_initialized
= 0;
202 /* Look in the symbol table for the address of a pseudo register
203 in memory. If we don't find it, pretend the register is not used
204 and not available. */
206 m68hc11_get_register_info (struct m68hc11_soft_reg
*reg
, const char *name
)
208 struct minimal_symbol
*msymbol
;
210 msymbol
= lookup_minimal_symbol (name
, NULL
, NULL
);
213 reg
->addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
214 reg
->name
= xstrdup (name
);
216 /* Keep track of the address range for soft registers. */
217 if (reg
->addr
< (CORE_ADDR
) soft_min_addr
)
218 soft_min_addr
= reg
->addr
;
219 if (reg
->addr
> (CORE_ADDR
) soft_max_addr
)
220 soft_max_addr
= reg
->addr
;
229 /* Initialize the table of soft register addresses according
230 to the symbol table. */
232 m68hc11_initialize_register_info (void)
236 if (soft_reg_initialized
)
239 soft_min_addr
= INT_MAX
;
241 for (i
= 0; i
< M68HC11_ALL_REGS
; i
++)
243 soft_regs
[i
].name
= 0;
246 m68hc11_get_register_info (&soft_regs
[SOFT_FP_REGNUM
], "_.frame");
247 m68hc11_get_register_info (&soft_regs
[SOFT_TMP_REGNUM
], "_.tmp");
248 m68hc11_get_register_info (&soft_regs
[SOFT_ZS_REGNUM
], "_.z");
249 soft_regs
[SOFT_Z_REGNUM
] = soft_regs
[SOFT_ZS_REGNUM
];
250 m68hc11_get_register_info (&soft_regs
[SOFT_XY_REGNUM
], "_.xy");
252 for (i
= SOFT_D1_REGNUM
; i
< M68HC11_MAX_SOFT_REGS
; i
++)
256 sprintf (buf
, "_.d%d", i
- SOFT_D1_REGNUM
+ 1);
257 m68hc11_get_register_info (&soft_regs
[i
], buf
);
260 if (soft_regs
[SOFT_FP_REGNUM
].name
== 0)
261 warning (_("No frame soft register found in the symbol table.\n"
262 "Stack backtrace will not work."));
263 soft_reg_initialized
= 1;
266 /* Given an address in memory, return the soft register number if
267 that address corresponds to a soft register. Returns -1 if not. */
269 m68hc11_which_soft_register (CORE_ADDR addr
)
273 if (addr
< soft_min_addr
|| addr
> soft_max_addr
)
276 for (i
= SOFT_FP_REGNUM
; i
< M68HC11_ALL_REGS
; i
++)
278 if (soft_regs
[i
].name
&& soft_regs
[i
].addr
== addr
)
284 /* Fetch a pseudo register. The 68hc11 soft registers are treated like
285 pseudo registers. They are located in memory. Translate the register
286 fetch into a memory read. */
288 m68hc11_pseudo_register_read (struct gdbarch
*gdbarch
,
289 struct regcache
*regcache
,
290 int regno
, gdb_byte
*buf
)
292 /* The PC is a pseudo reg only for 68HC12 with the memory bank
294 if (regno
== M68HC12_HARD_PC_REGNUM
)
297 const int regsize
= TYPE_LENGTH (builtin_type_uint32
);
299 regcache_cooked_read_unsigned (regcache
, HARD_PC_REGNUM
, &pc
);
300 if (pc
>= 0x8000 && pc
< 0xc000)
304 regcache_cooked_read_unsigned (regcache
, HARD_PAGE_REGNUM
, &page
);
309 store_unsigned_integer (buf
, regsize
, pc
);
313 m68hc11_initialize_register_info ();
315 /* Fetch a soft register: translate into a memory read. */
316 if (soft_regs
[regno
].name
)
318 target_read_memory (soft_regs
[regno
].addr
, buf
, 2);
326 /* Store a pseudo register. Translate the register store
327 into a memory write. */
329 m68hc11_pseudo_register_write (struct gdbarch
*gdbarch
,
330 struct regcache
*regcache
,
331 int regno
, const gdb_byte
*buf
)
333 /* The PC is a pseudo reg only for 68HC12 with the memory bank
335 if (regno
== M68HC12_HARD_PC_REGNUM
)
337 const int regsize
= TYPE_LENGTH (builtin_type_uint32
);
338 char *tmp
= alloca (regsize
);
341 memcpy (tmp
, buf
, regsize
);
342 pc
= extract_unsigned_integer (tmp
, regsize
);
346 regcache_cooked_write_unsigned (regcache
, HARD_PAGE_REGNUM
,
349 regcache_cooked_write_unsigned (regcache
, HARD_PC_REGNUM
,
353 regcache_cooked_write_unsigned (regcache
, HARD_PC_REGNUM
, pc
);
357 m68hc11_initialize_register_info ();
359 /* Store a soft register: translate into a memory write. */
360 if (soft_regs
[regno
].name
)
362 const int regsize
= 2;
363 char *tmp
= alloca (regsize
);
364 memcpy (tmp
, buf
, regsize
);
365 target_write_memory (soft_regs
[regno
].addr
, tmp
, regsize
);
370 m68hc11_register_name (int reg_nr
)
372 if (reg_nr
== M68HC12_HARD_PC_REGNUM
&& USE_PAGE_REGISTER
)
374 if (reg_nr
== HARD_PC_REGNUM
&& USE_PAGE_REGISTER
)
379 if (reg_nr
>= M68HC11_ALL_REGS
)
382 m68hc11_initialize_register_info ();
384 /* If we don't know the address of a soft register, pretend it
386 if (reg_nr
> M68HC11_LAST_HARD_REG
&& soft_regs
[reg_nr
].name
== 0)
388 return m68hc11_register_names
[reg_nr
];
391 static const unsigned char *
392 m68hc11_breakpoint_from_pc (CORE_ADDR
*pcptr
, int *lenptr
)
394 static unsigned char breakpoint
[] = {0x0};
396 *lenptr
= sizeof (breakpoint
);
401 /* 68HC11 & 68HC12 prologue analysis.
406 /* 68HC11 opcodes. */
407 #undef M6811_OP_PAGE2
408 #define M6811_OP_PAGE2 (0x18)
409 #define M6811_OP_LDX (0xde)
410 #define M6811_OP_LDX_EXT (0xfe)
411 #define M6811_OP_PSHX (0x3c)
412 #define M6811_OP_STS (0x9f)
413 #define M6811_OP_STS_EXT (0xbf)
414 #define M6811_OP_TSX (0x30)
415 #define M6811_OP_XGDX (0x8f)
416 #define M6811_OP_ADDD (0xc3)
417 #define M6811_OP_TXS (0x35)
418 #define M6811_OP_DES (0x34)
420 /* 68HC12 opcodes. */
421 #define M6812_OP_PAGE2 (0x18)
422 #define M6812_OP_MOVW (0x01)
423 #define M6812_PB_PSHW (0xae)
424 #define M6812_OP_STS (0x5f)
425 #define M6812_OP_STS_EXT (0x7f)
426 #define M6812_OP_LEAS (0x1b)
427 #define M6812_OP_PSHX (0x34)
428 #define M6812_OP_PSHY (0x35)
430 /* Operand extraction. */
431 #define OP_DIRECT (0x100) /* 8-byte direct addressing. */
432 #define OP_IMM_LOW (0x200) /* Low part of 16-bit constant/address. */
433 #define OP_IMM_HIGH (0x300) /* High part of 16-bit constant/address. */
434 #define OP_PBYTE (0x400) /* 68HC12 indexed operand. */
436 /* Identification of the sequence. */
440 P_SAVE_REG
, /* Save a register on the stack. */
441 P_SET_FRAME
, /* Setup the frame pointer. */
442 P_LOCAL_1
, /* Allocate 1 byte for locals. */
443 P_LOCAL_2
, /* Allocate 2 bytes for locals. */
444 P_LOCAL_N
/* Allocate N bytes for locals. */
447 struct insn_sequence
{
448 enum m6811_seq_type type
;
450 unsigned short code
[MAX_CODES
];
453 /* Sequence of instructions in the 68HC11 function prologue. */
454 static struct insn_sequence m6811_prologue
[] = {
455 /* Sequences to save a soft-register. */
456 { P_SAVE_REG
, 3, { M6811_OP_LDX
, OP_DIRECT
,
458 { P_SAVE_REG
, 5, { M6811_OP_PAGE2
, M6811_OP_LDX
, OP_DIRECT
,
459 M6811_OP_PAGE2
, M6811_OP_PSHX
} },
460 { P_SAVE_REG
, 4, { M6811_OP_LDX_EXT
, OP_IMM_HIGH
, OP_IMM_LOW
,
462 { P_SAVE_REG
, 6, { M6811_OP_PAGE2
, M6811_OP_LDX_EXT
, OP_IMM_HIGH
, OP_IMM_LOW
,
463 M6811_OP_PAGE2
, M6811_OP_PSHX
} },
465 /* Sequences to allocate local variables. */
466 { P_LOCAL_N
, 7, { M6811_OP_TSX
,
468 M6811_OP_ADDD
, OP_IMM_HIGH
, OP_IMM_LOW
,
471 { P_LOCAL_N
, 11, { M6811_OP_PAGE2
, M6811_OP_TSX
,
472 M6811_OP_PAGE2
, M6811_OP_XGDX
,
473 M6811_OP_ADDD
, OP_IMM_HIGH
, OP_IMM_LOW
,
474 M6811_OP_PAGE2
, M6811_OP_XGDX
,
475 M6811_OP_PAGE2
, M6811_OP_TXS
} },
476 { P_LOCAL_1
, 1, { M6811_OP_DES
} },
477 { P_LOCAL_2
, 1, { M6811_OP_PSHX
} },
478 { P_LOCAL_2
, 2, { M6811_OP_PAGE2
, M6811_OP_PSHX
} },
480 /* Initialize the frame pointer. */
481 { P_SET_FRAME
, 2, { M6811_OP_STS
, OP_DIRECT
} },
482 { P_SET_FRAME
, 3, { M6811_OP_STS_EXT
, OP_IMM_HIGH
, OP_IMM_LOW
} },
487 /* Sequence of instructions in the 68HC12 function prologue. */
488 static struct insn_sequence m6812_prologue
[] = {
489 { P_SAVE_REG
, 5, { M6812_OP_PAGE2
, M6812_OP_MOVW
, M6812_PB_PSHW
,
490 OP_IMM_HIGH
, OP_IMM_LOW
} },
491 { P_SET_FRAME
, 2, { M6812_OP_STS
, OP_DIRECT
} },
492 { P_SET_FRAME
, 3, { M6812_OP_STS_EXT
, OP_IMM_HIGH
, OP_IMM_LOW
} },
493 { P_LOCAL_N
, 2, { M6812_OP_LEAS
, OP_PBYTE
} },
494 { P_LOCAL_2
, 1, { M6812_OP_PSHX
} },
495 { P_LOCAL_2
, 1, { M6812_OP_PSHY
} },
500 /* Analyze the sequence of instructions starting at the given address.
501 Returns a pointer to the sequence when it is recognized and
502 the optional value (constant/address) associated with it. */
503 static struct insn_sequence
*
504 m68hc11_analyze_instruction (struct insn_sequence
*seq
, CORE_ADDR pc
,
507 unsigned char buffer
[MAX_CODES
];
514 for (; seq
->type
!= P_LAST
; seq
++)
517 for (j
= 0; j
< seq
->length
; j
++)
521 buffer
[bufsize
] = read_memory_unsigned_integer (pc
+ bufsize
,
525 /* Continue while we match the opcode. */
526 if (seq
->code
[j
] == buffer
[j
])
529 if ((seq
->code
[j
] & 0xf00) == 0)
532 /* Extract a sequence parameter (address or constant). */
533 switch (seq
->code
[j
])
536 cur_val
= (CORE_ADDR
) buffer
[j
];
540 cur_val
= cur_val
& 0x0ff;
541 cur_val
|= (buffer
[j
] << 8);
546 cur_val
|= buffer
[j
];
550 if ((buffer
[j
] & 0xE0) == 0x80)
552 v
= buffer
[j
] & 0x1f;
556 else if ((buffer
[j
] & 0xfe) == 0xf0)
558 v
= read_memory_unsigned_integer (pc
+ j
+ 1, 1);
562 else if (buffer
[j
] == 0xf2)
564 v
= read_memory_unsigned_integer (pc
+ j
+ 1, 2);
571 /* We have a full match. */
572 if (j
== seq
->length
)
581 /* Return the instruction that the function at the PC is using. */
582 static enum insn_return_kind
583 m68hc11_get_return_insn (CORE_ADDR pc
)
585 struct minimal_symbol
*sym
;
587 /* A flag indicating that this is a STO_M68HC12_FAR or STO_M68HC12_INTERRUPT
588 function is stored by elfread.c in the high bit of the info field.
589 Use this to decide which instruction the function uses to return. */
590 sym
= lookup_minimal_symbol_by_pc (pc
);
594 if (MSYMBOL_IS_RTC (sym
))
596 else if (MSYMBOL_IS_RTI (sym
))
602 /* Analyze the function prologue to find some information
604 - the PC of the first line (for m68hc11_skip_prologue)
605 - the offset of the previous frame saved address (from current frame)
606 - the soft registers which are pushed. */
608 m68hc11_scan_prologue (CORE_ADDR pc
, CORE_ADDR current_pc
,
609 struct m68hc11_unwind_cache
*info
)
614 int found_frame_point
;
617 struct insn_sequence
*seq_table
;
621 if (pc
>= current_pc
)
626 m68hc11_initialize_register_info ();
633 seq_table
= gdbarch_tdep (current_gdbarch
)->prologue
;
635 /* The 68hc11 stack is as follows:
651 +-----------+ <--- current frame
654 With most processors (like 68K) the previous frame can be computed
655 easily because it is always at a fixed offset (see link/unlink).
656 That is, locals are accessed with negative offsets, arguments are
657 accessed with positive ones. Since 68hc11 only supports offsets
658 in the range [0..255], the frame is defined at the bottom of
659 locals (see picture).
661 The purpose of the analysis made here is to find out the size
662 of locals in this function. An alternative to this is to use
663 DWARF2 info. This would be better but I don't know how to
664 access dwarf2 debug from this function.
666 Walk from the function entry point to the point where we save
667 the frame. While walking instructions, compute the size of bytes
668 which are pushed. This gives us the index to access the previous
671 We limit the search to 128 bytes so that the algorithm is bounded
672 in case of random and wrong code. We also stop and abort if
673 we find an instruction which is not supposed to appear in the
674 prologue (as generated by gcc 2.95, 2.96).
677 found_frame_point
= 0;
680 while (!done
&& pc
+ 2 < func_end
)
682 struct insn_sequence
*seq
;
685 seq
= m68hc11_analyze_instruction (seq_table
, pc
, &val
);
689 /* If we are within the instruction group, we can't advance the
690 pc nor the stack offset. Otherwise the caller's stack computed
691 from the current stack can be wrong. */
692 if (pc
+ seq
->length
> current_pc
)
695 pc
= pc
+ seq
->length
;
696 if (seq
->type
== P_SAVE_REG
)
698 if (found_frame_point
)
700 saved_reg
= m68hc11_which_soft_register (val
);
705 if (info
->saved_regs
)
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
, NORMAL_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
860 i
< gdbarch_num_regs (current_gdbarch
)
861 + gdbarch_num_pseudo_regs (current_gdbarch
) - 1;
863 if (trad_frame_addr_p (info
->saved_regs
, i
))
865 info
->saved_regs
[i
].addr
+= this_base
;
868 /* The previous frame's SP needed to be computed. Save the computed
870 trad_frame_set_value (info
->saved_regs
, HARD_SP_REGNUM
, info
->prev_sp
);
875 /* Given a GDB frame, determine the address of the calling function's
876 frame. This will be used to create a new GDB frame struct. */
879 m68hc11_frame_this_id (struct frame_info
*next_frame
,
880 void **this_prologue_cache
,
881 struct frame_id
*this_id
)
883 struct m68hc11_unwind_cache
*info
884 = m68hc11_frame_unwind_cache (next_frame
, this_prologue_cache
);
889 /* The FUNC is easy. */
890 func
= frame_func_unwind (next_frame
, NORMAL_FRAME
);
892 /* Hopefully the prologue analysis either correctly determined the
893 frame's base (which is the SP from the previous frame), or set
894 that base to "NULL". */
895 base
= info
->prev_sp
;
899 id
= frame_id_build (base
, func
);
904 m68hc11_frame_prev_register (struct frame_info
*next_frame
,
905 void **this_prologue_cache
,
906 int regnum
, int *optimizedp
,
907 enum lval_type
*lvalp
, CORE_ADDR
*addrp
,
908 int *realnump
, gdb_byte
*bufferp
)
910 struct m68hc11_unwind_cache
*info
911 = m68hc11_frame_unwind_cache (next_frame
, this_prologue_cache
);
913 trad_frame_get_prev_register (next_frame
, info
->saved_regs
, regnum
,
914 optimizedp
, lvalp
, addrp
, realnump
, bufferp
);
916 if (regnum
== HARD_PC_REGNUM
)
918 /* Take into account the 68HC12 specific call (PC + page). */
919 if (info
->return_kind
== RETURN_RTC
920 && *addrp
>= 0x08000 && *addrp
< 0x0c000
921 && USE_PAGE_REGISTER
)
927 trad_frame_get_prev_register (next_frame
, info
->saved_regs
,
928 HARD_PAGE_REGNUM
, &page_optimized
,
931 *addrp
+= ((page
& 0x0ff) << 14);
937 static const struct frame_unwind m68hc11_frame_unwind
= {
939 m68hc11_frame_this_id
,
940 m68hc11_frame_prev_register
943 const struct frame_unwind
*
944 m68hc11_frame_sniffer (struct frame_info
*next_frame
)
946 return &m68hc11_frame_unwind
;
950 m68hc11_frame_base_address (struct frame_info
*next_frame
, void **this_cache
)
952 struct m68hc11_unwind_cache
*info
953 = m68hc11_frame_unwind_cache (next_frame
, this_cache
);
959 m68hc11_frame_args_address (struct frame_info
*next_frame
, void **this_cache
)
962 struct m68hc11_unwind_cache
*info
963 = m68hc11_frame_unwind_cache (next_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 frame_unwind_unsigned_register (next_frame
, HARD_SP_REGNUM
, &sp
);
989 /* Assuming NEXT_FRAME->prev is a dummy, return the frame ID of that
990 dummy frame. The frame ID's base needs to match the TOS value
991 saved by save_dummy_frame_tos(), and the PC match the dummy frame's
994 static struct frame_id
995 m68hc11_unwind_dummy_id (struct gdbarch
*gdbarch
, struct frame_info
*next_frame
)
998 CORE_ADDR pc
= frame_pc_unwind (next_frame
);
1000 frame_unwind_unsigned_register (next_frame
, SOFT_FP_REGNUM
, &tos
);
1002 return frame_id_build (tos
, pc
);
1006 /* Get and print the register from the given frame. */
1008 m68hc11_print_register (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1009 struct frame_info
*frame
, int regno
)
1013 if (regno
== HARD_PC_REGNUM
|| regno
== HARD_SP_REGNUM
1014 || regno
== SOFT_FP_REGNUM
|| regno
== M68HC12_HARD_PC_REGNUM
)
1015 rval
= get_frame_register_unsigned (frame
, regno
);
1017 rval
= get_frame_register_signed (frame
, regno
);
1019 if (regno
== HARD_A_REGNUM
|| regno
== HARD_B_REGNUM
1020 || regno
== HARD_CCR_REGNUM
|| regno
== HARD_PAGE_REGNUM
)
1022 fprintf_filtered (file
, "0x%02x ", (unsigned char) rval
);
1023 if (regno
!= HARD_CCR_REGNUM
)
1024 print_longest (file
, 'd', 1, rval
);
1028 if (regno
== HARD_PC_REGNUM
&& gdbarch_tdep (gdbarch
)->use_page_register
)
1032 page
= get_frame_register_unsigned (frame
, HARD_PAGE_REGNUM
);
1033 fprintf_filtered (file
, "0x%02x:%04x ", (unsigned) page
,
1038 fprintf_filtered (file
, "0x%04x ", (unsigned) rval
);
1039 if (regno
!= HARD_PC_REGNUM
&& regno
!= HARD_SP_REGNUM
1040 && regno
!= SOFT_FP_REGNUM
&& regno
!= M68HC12_HARD_PC_REGNUM
)
1041 print_longest (file
, 'd', 1, rval
);
1045 if (regno
== HARD_CCR_REGNUM
)
1049 unsigned char l
= rval
& 0xff;
1051 fprintf_filtered (file
, "%c%c%c%c%c%c%c%c ",
1052 l
& M6811_S_BIT
? 'S' : '-',
1053 l
& M6811_X_BIT
? 'X' : '-',
1054 l
& M6811_H_BIT
? 'H' : '-',
1055 l
& M6811_I_BIT
? 'I' : '-',
1056 l
& M6811_N_BIT
? 'N' : '-',
1057 l
& M6811_Z_BIT
? 'Z' : '-',
1058 l
& M6811_V_BIT
? 'V' : '-',
1059 l
& M6811_C_BIT
? 'C' : '-');
1060 N
= (l
& M6811_N_BIT
) != 0;
1061 Z
= (l
& M6811_Z_BIT
) != 0;
1062 V
= (l
& M6811_V_BIT
) != 0;
1063 C
= (l
& M6811_C_BIT
) != 0;
1065 /* Print flags following the h8300 */
1067 fprintf_filtered (file
, "u> ");
1068 else if ((C
| Z
) == 1)
1069 fprintf_filtered (file
, "u<= ");
1071 fprintf_filtered (file
, "u< ");
1074 fprintf_filtered (file
, "!= ");
1076 fprintf_filtered (file
, "== ");
1079 fprintf_filtered (file
, ">= ");
1081 fprintf_filtered (file
, "< ");
1083 if ((Z
| (N
^ V
)) == 0)
1084 fprintf_filtered (file
, "> ");
1086 fprintf_filtered (file
, "<= ");
1090 /* Same as 'info reg' but prints the registers in a different way. */
1092 m68hc11_print_registers_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1093 struct frame_info
*frame
, int regno
, int cpregs
)
1097 const char *name
= gdbarch_register_name (gdbarch
, regno
);
1099 if (!name
|| !*name
)
1102 fprintf_filtered (file
, "%-10s ", name
);
1103 m68hc11_print_register (gdbarch
, file
, frame
, regno
);
1104 fprintf_filtered (file
, "\n");
1110 fprintf_filtered (file
, "PC=");
1111 m68hc11_print_register (gdbarch
, file
, frame
, HARD_PC_REGNUM
);
1113 fprintf_filtered (file
, " SP=");
1114 m68hc11_print_register (gdbarch
, file
, frame
, HARD_SP_REGNUM
);
1116 fprintf_filtered (file
, " FP=");
1117 m68hc11_print_register (gdbarch
, file
, frame
, SOFT_FP_REGNUM
);
1119 fprintf_filtered (file
, "\nCCR=");
1120 m68hc11_print_register (gdbarch
, file
, frame
, HARD_CCR_REGNUM
);
1122 fprintf_filtered (file
, "\nD=");
1123 m68hc11_print_register (gdbarch
, file
, frame
, HARD_D_REGNUM
);
1125 fprintf_filtered (file
, " X=");
1126 m68hc11_print_register (gdbarch
, file
, frame
, HARD_X_REGNUM
);
1128 fprintf_filtered (file
, " Y=");
1129 m68hc11_print_register (gdbarch
, file
, frame
, HARD_Y_REGNUM
);
1131 if (gdbarch_tdep (gdbarch
)->use_page_register
)
1133 fprintf_filtered (file
, "\nPage=");
1134 m68hc11_print_register (gdbarch
, file
, frame
, HARD_PAGE_REGNUM
);
1136 fprintf_filtered (file
, "\n");
1139 for (i
= SOFT_D1_REGNUM
; i
< M68HC11_ALL_REGS
; i
++)
1141 /* Skip registers which are not defined in the symbol table. */
1142 if (soft_regs
[i
].name
== 0)
1145 fprintf_filtered (file
, "D%d=", i
- SOFT_D1_REGNUM
+ 1);
1146 m68hc11_print_register (gdbarch
, file
, frame
, i
);
1149 fprintf_filtered (file
, "\n");
1151 fprintf_filtered (file
, " ");
1153 if (nr
&& (nr
% 8) != 7)
1154 fprintf_filtered (file
, "\n");
1159 m68hc11_push_dummy_call (struct gdbarch
*gdbarch
, struct value
*function
,
1160 struct regcache
*regcache
, CORE_ADDR bp_addr
,
1161 int nargs
, struct value
**args
, CORE_ADDR sp
,
1162 int struct_return
, CORE_ADDR struct_addr
)
1165 int first_stack_argnum
;
1171 first_stack_argnum
= 0;
1174 regcache_cooked_write_unsigned (regcache
, HARD_D_REGNUM
, struct_addr
);
1178 type
= value_type (args
[0]);
1179 len
= TYPE_LENGTH (type
);
1181 /* First argument is passed in D and X registers. */
1186 v
= extract_unsigned_integer (value_contents (args
[0]), len
);
1187 first_stack_argnum
= 1;
1189 regcache_cooked_write_unsigned (regcache
, HARD_D_REGNUM
, v
);
1193 regcache_cooked_write_unsigned (regcache
, HARD_X_REGNUM
, v
);
1198 for (argnum
= nargs
- 1; argnum
>= first_stack_argnum
; argnum
--)
1200 type
= value_type (args
[argnum
]);
1201 len
= TYPE_LENGTH (type
);
1205 static char zero
= 0;
1208 write_memory (sp
, &zero
, 1);
1210 val
= (char*) value_contents (args
[argnum
]);
1212 write_memory (sp
, val
, len
);
1215 /* Store return address. */
1217 store_unsigned_integer (buf
, 2, bp_addr
);
1218 write_memory (sp
, buf
, 2);
1220 /* Finally, update the stack pointer... */
1221 sp
-= STACK_CORRECTION
;
1222 regcache_cooked_write_unsigned (regcache
, HARD_SP_REGNUM
, sp
);
1224 /* ...and fake a frame pointer. */
1225 regcache_cooked_write_unsigned (regcache
, SOFT_FP_REGNUM
, sp
);
1227 /* DWARF2/GCC uses the stack address *before* the function call as a
1233 /* Return the GDB type object for the "standard" data type
1234 of data in register N. */
1236 static struct type
*
1237 m68hc11_register_type (struct gdbarch
*gdbarch
, int reg_nr
)
1241 case HARD_PAGE_REGNUM
:
1244 case HARD_CCR_REGNUM
:
1245 return builtin_type_uint8
;
1247 case M68HC12_HARD_PC_REGNUM
:
1248 return builtin_type_uint32
;
1251 return builtin_type_uint16
;
1256 m68hc11_store_return_value (struct type
*type
, struct regcache
*regcache
,
1261 len
= TYPE_LENGTH (type
);
1263 /* First argument is passed in D and X registers. */
1265 regcache_raw_write_part (regcache
, HARD_D_REGNUM
, 2 - len
, len
, valbuf
);
1268 regcache_raw_write_part (regcache
, HARD_X_REGNUM
, 4 - len
,
1270 regcache_raw_write (regcache
, HARD_D_REGNUM
, (char*) valbuf
+ (len
- 2));
1273 error (_("return of value > 4 is not supported."));
1277 /* Given a return value in `regcache' with a type `type',
1278 extract and copy its value into `valbuf'. */
1281 m68hc11_extract_return_value (struct type
*type
, struct regcache
*regcache
,
1284 int len
= TYPE_LENGTH (type
);
1285 char buf
[M68HC11_REG_SIZE
];
1287 regcache_raw_read (regcache
, HARD_D_REGNUM
, buf
);
1291 memcpy (valbuf
, buf
+ 1, 1);
1295 memcpy (valbuf
, buf
, 2);
1299 memcpy ((char*) valbuf
+ 1, buf
, 2);
1300 regcache_raw_read (regcache
, HARD_X_REGNUM
, buf
);
1301 memcpy (valbuf
, buf
+ 1, 1);
1305 memcpy ((char*) valbuf
+ 2, buf
, 2);
1306 regcache_raw_read (regcache
, HARD_X_REGNUM
, buf
);
1307 memcpy (valbuf
, buf
, 2);
1311 error (_("bad size for return value"));
1315 enum return_value_convention
1316 m68hc11_return_value (struct gdbarch
*gdbarch
, struct type
*valtype
,
1317 struct regcache
*regcache
, gdb_byte
*readbuf
,
1318 const gdb_byte
*writebuf
)
1320 if (TYPE_CODE (valtype
) == TYPE_CODE_STRUCT
1321 || TYPE_CODE (valtype
) == TYPE_CODE_UNION
1322 || TYPE_CODE (valtype
) == TYPE_CODE_ARRAY
1323 || TYPE_LENGTH (valtype
) > 4)
1324 return RETURN_VALUE_STRUCT_CONVENTION
;
1327 if (readbuf
!= NULL
)
1328 m68hc11_extract_return_value (valtype
, regcache
, readbuf
);
1329 if (writebuf
!= NULL
)
1330 m68hc11_store_return_value (valtype
, regcache
, writebuf
);
1331 return RETURN_VALUE_REGISTER_CONVENTION
;
1335 /* Test whether the ELF symbol corresponds to a function using rtc or
1339 m68hc11_elf_make_msymbol_special (asymbol
*sym
, struct minimal_symbol
*msym
)
1341 unsigned char flags
;
1343 flags
= ((elf_symbol_type
*)sym
)->internal_elf_sym
.st_other
;
1344 if (flags
& STO_M68HC12_FAR
)
1345 MSYMBOL_SET_RTC (msym
);
1346 if (flags
& STO_M68HC12_INTERRUPT
)
1347 MSYMBOL_SET_RTI (msym
);
1351 gdb_print_insn_m68hc11 (bfd_vma memaddr
, disassemble_info
*info
)
1353 if (gdbarch_bfd_arch_info (current_gdbarch
)->arch
== bfd_arch_m68hc11
)
1354 return print_insn_m68hc11 (memaddr
, info
);
1356 return print_insn_m68hc12 (memaddr
, info
);
1361 /* 68HC11/68HC12 register groups.
1362 Identify real hard registers and soft registers used by gcc. */
1364 static struct reggroup
*m68hc11_soft_reggroup
;
1365 static struct reggroup
*m68hc11_hard_reggroup
;
1368 m68hc11_init_reggroups (void)
1370 m68hc11_hard_reggroup
= reggroup_new ("hard", USER_REGGROUP
);
1371 m68hc11_soft_reggroup
= reggroup_new ("soft", USER_REGGROUP
);
1375 m68hc11_add_reggroups (struct gdbarch
*gdbarch
)
1377 reggroup_add (gdbarch
, m68hc11_hard_reggroup
);
1378 reggroup_add (gdbarch
, m68hc11_soft_reggroup
);
1379 reggroup_add (gdbarch
, general_reggroup
);
1380 reggroup_add (gdbarch
, float_reggroup
);
1381 reggroup_add (gdbarch
, all_reggroup
);
1382 reggroup_add (gdbarch
, save_reggroup
);
1383 reggroup_add (gdbarch
, restore_reggroup
);
1384 reggroup_add (gdbarch
, vector_reggroup
);
1385 reggroup_add (gdbarch
, system_reggroup
);
1389 m68hc11_register_reggroup_p (struct gdbarch
*gdbarch
, int regnum
,
1390 struct reggroup
*group
)
1392 /* We must save the real hard register as well as gcc
1393 soft registers including the frame pointer. */
1394 if (group
== save_reggroup
|| group
== restore_reggroup
)
1396 return (regnum
<= gdbarch_num_regs (gdbarch
)
1397 || ((regnum
== SOFT_FP_REGNUM
1398 || regnum
== SOFT_TMP_REGNUM
1399 || regnum
== SOFT_ZS_REGNUM
1400 || regnum
== SOFT_XY_REGNUM
)
1401 && m68hc11_register_name (regnum
)));
1404 /* Group to identify gcc soft registers (d1..dN). */
1405 if (group
== m68hc11_soft_reggroup
)
1407 return regnum
>= SOFT_D1_REGNUM
&& m68hc11_register_name (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 frame_unwind_append_sniffer (gdbarch
, dwarf2_frame_sniffer
);
1526 frame_unwind_append_sniffer (gdbarch
, m68hc11_frame_sniffer
);
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_unwind_dummy_id (gdbarch
, m68hc11_unwind_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 ();