1 /* Target-dependent code for Motorola 68HC11 & 68HC12
3 Copyright (C) 1999-2021 Free Software Foundation, Inc.
5 Contributed by Stephane Carrez, stcarrez@nerim.fr
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "frame-unwind.h"
26 #include "frame-base.h"
27 #include "dwarf2/frame.h"
28 #include "trad-frame.h"
38 #include "arch-utils.h"
40 #include "reggroups.h"
43 #include "opcode/m68hc11.h"
44 #include "elf/m68hc11.h"
47 /* Macros for setting and testing a bit in a minimal symbol.
48 For 68HC11/68HC12 we have two flags that tell which return
49 type the function is using. This is used for prologue and frame
50 analysis to compute correct stack frame layout.
52 The MSB of the minimal symbol's "info" field is used for this purpose.
54 MSYMBOL_SET_RTC Actually sets the "RTC" bit.
55 MSYMBOL_SET_RTI Actually sets the "RTI" bit.
56 MSYMBOL_IS_RTC Tests the "RTC" bit in a minimal symbol.
57 MSYMBOL_IS_RTI Tests the "RTC" bit in a minimal symbol. */
59 #define MSYMBOL_SET_RTC(msym) \
60 MSYMBOL_TARGET_FLAG_1 (msym) = 1
62 #define MSYMBOL_SET_RTI(msym) \
63 MSYMBOL_TARGET_FLAG_2 (msym) = 1
65 #define MSYMBOL_IS_RTC(msym) \
66 MSYMBOL_TARGET_FLAG_1 (msym)
68 #define MSYMBOL_IS_RTI(msym) \
69 MSYMBOL_TARGET_FLAG_2 (msym)
71 enum insn_return_kind
{
78 /* Register numbers of various important registers. */
80 #define HARD_X_REGNUM 0
81 #define HARD_D_REGNUM 1
82 #define HARD_Y_REGNUM 2
83 #define HARD_SP_REGNUM 3
84 #define HARD_PC_REGNUM 4
86 #define HARD_A_REGNUM 5
87 #define HARD_B_REGNUM 6
88 #define HARD_CCR_REGNUM 7
90 /* 68HC12 page number register.
91 Note: to keep a compatibility with gcc register naming, we must
92 not have to rename FP and other soft registers. The page register
93 is a real hard register and must therefore be counted by gdbarch_num_regs.
94 For this it has the same number as Z register (which is not used). */
95 #define HARD_PAGE_REGNUM 8
96 #define M68HC11_LAST_HARD_REG (HARD_PAGE_REGNUM)
98 /* Z is replaced by X or Y by gcc during machine reorg.
99 ??? There is no way to get it and even know whether
100 it's in X or Y or in ZS. */
101 #define SOFT_Z_REGNUM 8
103 /* Soft registers. These registers are special. There are treated
104 like normal hard registers by gcc and gdb (ie, within dwarf2 info).
105 They are physically located in memory. */
106 #define SOFT_FP_REGNUM 9
107 #define SOFT_TMP_REGNUM 10
108 #define SOFT_ZS_REGNUM 11
109 #define SOFT_XY_REGNUM 12
110 #define SOFT_UNUSED_REGNUM 13
111 #define SOFT_D1_REGNUM 14
112 #define SOFT_D32_REGNUM (SOFT_D1_REGNUM+31)
113 #define M68HC11_MAX_SOFT_REGS 32
115 #define M68HC11_NUM_REGS (M68HC11_LAST_HARD_REG + 1)
116 #define M68HC11_NUM_PSEUDO_REGS (M68HC11_MAX_SOFT_REGS+5)
117 #define M68HC11_ALL_REGS (M68HC11_NUM_REGS+M68HC11_NUM_PSEUDO_REGS)
119 #define M68HC11_REG_SIZE (2)
121 #define M68HC12_NUM_REGS (9)
122 #define M68HC12_NUM_PSEUDO_REGS ((M68HC11_MAX_SOFT_REGS+5)+1-1)
123 #define M68HC12_HARD_PC_REGNUM (SOFT_D32_REGNUM+1)
125 struct insn_sequence
;
126 struct m68gc11_gdbarch_tdep
: gdbarch_tdep
128 /* Stack pointer correction value. For 68hc11, the stack pointer points
129 to the next push location. An offset of 1 must be applied to obtain
130 the address where the last value is saved. For 68hc12, the stack
131 pointer points to the last value pushed. No offset is necessary. */
132 int stack_correction
= 0;
134 /* Description of instructions in the prologue. */
135 struct insn_sequence
*prologue
= nullptr;
137 /* True if the page memory bank register is available
139 int use_page_register
= 0;
141 /* ELF flags for ABI. */
146 stack_correction (gdbarch
*arch
)
148 m68gc11_gdbarch_tdep
*tdep
= (m68gc11_gdbarch_tdep
*) gdbarch_tdep (arch
);
149 return tdep
->stack_correction
;
153 use_page_register (gdbarch
*arch
)
155 m68gc11_gdbarch_tdep
*tdep
= (m68gc11_gdbarch_tdep
*) gdbarch_tdep (arch
);
156 return tdep
->stack_correction
;
159 struct m68hc11_unwind_cache
161 /* The previous frame's inner most stack address. Used as this
162 frame ID's stack_addr. */
164 /* The frame's base, optionally used by the high-level debug info. */
172 enum insn_return_kind return_kind
;
174 /* Table indicating the location of each and every register. */
175 trad_frame_saved_reg
*saved_regs
;
178 /* Table of registers for 68HC11. This includes the hard registers
179 and the soft registers used by GCC. */
181 m68hc11_register_names
[] =
183 "x", "d", "y", "sp", "pc", "a", "b",
184 "ccr", "page", "frame","tmp", "zs", "xy", 0,
185 "d1", "d2", "d3", "d4", "d5", "d6", "d7",
186 "d8", "d9", "d10", "d11", "d12", "d13", "d14",
187 "d15", "d16", "d17", "d18", "d19", "d20", "d21",
188 "d22", "d23", "d24", "d25", "d26", "d27", "d28",
189 "d29", "d30", "d31", "d32"
192 struct m68hc11_soft_reg
198 static struct m68hc11_soft_reg soft_regs
[M68HC11_ALL_REGS
];
200 #define M68HC11_FP_ADDR soft_regs[SOFT_FP_REGNUM].addr
202 static int soft_min_addr
;
203 static int soft_max_addr
;
204 static int soft_reg_initialized
= 0;
206 /* Look in the symbol table for the address of a pseudo register
207 in memory. If we don't find it, pretend the register is not used
208 and not available. */
210 m68hc11_get_register_info (struct m68hc11_soft_reg
*reg
, const char *name
)
212 struct bound_minimal_symbol msymbol
;
214 msymbol
= lookup_minimal_symbol (name
, NULL
, NULL
);
217 reg
->addr
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
218 reg
->name
= xstrdup (name
);
220 /* Keep track of the address range for soft registers. */
221 if (reg
->addr
< (CORE_ADDR
) soft_min_addr
)
222 soft_min_addr
= reg
->addr
;
223 if (reg
->addr
> (CORE_ADDR
) soft_max_addr
)
224 soft_max_addr
= reg
->addr
;
233 /* Initialize the table of soft register addresses according
234 to the symbol table. */
236 m68hc11_initialize_register_info (void)
240 if (soft_reg_initialized
)
243 soft_min_addr
= INT_MAX
;
245 for (i
= 0; i
< M68HC11_ALL_REGS
; i
++)
247 soft_regs
[i
].name
= 0;
250 m68hc11_get_register_info (&soft_regs
[SOFT_FP_REGNUM
], "_.frame");
251 m68hc11_get_register_info (&soft_regs
[SOFT_TMP_REGNUM
], "_.tmp");
252 m68hc11_get_register_info (&soft_regs
[SOFT_ZS_REGNUM
], "_.z");
253 soft_regs
[SOFT_Z_REGNUM
] = soft_regs
[SOFT_ZS_REGNUM
];
254 m68hc11_get_register_info (&soft_regs
[SOFT_XY_REGNUM
], "_.xy");
256 for (i
= SOFT_D1_REGNUM
; i
< M68HC11_MAX_SOFT_REGS
; i
++)
260 xsnprintf (buf
, sizeof (buf
), "_.d%d", i
- SOFT_D1_REGNUM
+ 1);
261 m68hc11_get_register_info (&soft_regs
[i
], buf
);
264 if (soft_regs
[SOFT_FP_REGNUM
].name
== 0)
265 warning (_("No frame soft register found in the symbol table.\n"
266 "Stack backtrace will not work."));
267 soft_reg_initialized
= 1;
270 /* Given an address in memory, return the soft register number if
271 that address corresponds to a soft register. Returns -1 if not. */
273 m68hc11_which_soft_register (CORE_ADDR addr
)
277 if (addr
< soft_min_addr
|| addr
> soft_max_addr
)
280 for (i
= SOFT_FP_REGNUM
; i
< M68HC11_ALL_REGS
; i
++)
282 if (soft_regs
[i
].name
&& soft_regs
[i
].addr
== addr
)
288 /* Fetch a pseudo register. The 68hc11 soft registers are treated like
289 pseudo registers. They are located in memory. Translate the register
290 fetch into a memory read. */
291 static enum register_status
292 m68hc11_pseudo_register_read (struct gdbarch
*gdbarch
,
293 readable_regcache
*regcache
,
294 int regno
, gdb_byte
*buf
)
296 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
298 /* The PC is a pseudo reg only for 68HC12 with the memory bank
300 if (regno
== M68HC12_HARD_PC_REGNUM
)
303 const int regsize
= 4;
304 enum register_status status
;
306 status
= regcache
->cooked_read (HARD_PC_REGNUM
, &pc
);
307 if (status
!= REG_VALID
)
309 if (pc
>= 0x8000 && pc
< 0xc000)
313 regcache
->cooked_read (HARD_PAGE_REGNUM
, &page
);
318 store_unsigned_integer (buf
, regsize
, byte_order
, pc
);
322 m68hc11_initialize_register_info ();
324 /* Fetch a soft register: translate into a memory read. */
325 if (soft_regs
[regno
].name
)
327 target_read_memory (soft_regs
[regno
].addr
, buf
, 2);
337 /* Store a pseudo register. Translate the register store
338 into a memory write. */
340 m68hc11_pseudo_register_write (struct gdbarch
*gdbarch
,
341 struct regcache
*regcache
,
342 int regno
, const gdb_byte
*buf
)
344 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
346 /* The PC is a pseudo reg only for 68HC12 with the memory bank
348 if (regno
== M68HC12_HARD_PC_REGNUM
)
350 const int regsize
= 4;
351 gdb_byte
*tmp
= (gdb_byte
*) alloca (regsize
);
354 memcpy (tmp
, buf
, regsize
);
355 pc
= extract_unsigned_integer (tmp
, regsize
, byte_order
);
359 regcache_cooked_write_unsigned (regcache
, HARD_PAGE_REGNUM
,
362 regcache_cooked_write_unsigned (regcache
, HARD_PC_REGNUM
,
366 regcache_cooked_write_unsigned (regcache
, HARD_PC_REGNUM
, pc
);
370 m68hc11_initialize_register_info ();
372 /* Store a soft register: translate into a memory write. */
373 if (soft_regs
[regno
].name
)
375 const int regsize
= 2;
376 gdb_byte
*tmp
= (gdb_byte
*) alloca (regsize
);
377 memcpy (tmp
, buf
, regsize
);
378 target_write_memory (soft_regs
[regno
].addr
, tmp
, regsize
);
383 m68hc11_register_name (struct gdbarch
*gdbarch
, int reg_nr
)
385 if (reg_nr
== M68HC12_HARD_PC_REGNUM
&& use_page_register (gdbarch
))
388 if (reg_nr
== HARD_PC_REGNUM
&& use_page_register (gdbarch
))
394 if (reg_nr
>= M68HC11_ALL_REGS
)
397 m68hc11_initialize_register_info ();
399 /* If we don't know the address of a soft register, pretend it
401 if (reg_nr
> M68HC11_LAST_HARD_REG
&& soft_regs
[reg_nr
].name
== 0)
404 return m68hc11_register_names
[reg_nr
];
407 constexpr gdb_byte m68hc11_break_insn
[] = {0x0};
409 typedef BP_MANIPULATION (m68hc11_break_insn
) m68hc11_breakpoint
;
411 /* 68HC11 & 68HC12 prologue analysis. */
415 /* 68HC11 opcodes. */
416 #undef M6811_OP_PAGE2
417 #define M6811_OP_PAGE2 (0x18)
418 #define M6811_OP_LDX (0xde)
419 #define M6811_OP_LDX_EXT (0xfe)
420 #define M6811_OP_PSHX (0x3c)
421 #define M6811_OP_STS (0x9f)
422 #define M6811_OP_STS_EXT (0xbf)
423 #define M6811_OP_TSX (0x30)
424 #define M6811_OP_XGDX (0x8f)
425 #define M6811_OP_ADDD (0xc3)
426 #define M6811_OP_TXS (0x35)
427 #define M6811_OP_DES (0x34)
429 /* 68HC12 opcodes. */
430 #define M6812_OP_PAGE2 (0x18)
431 #define M6812_OP_MOVW (0x01)
432 #define M6812_PB_PSHW (0xae)
433 #define M6812_OP_STS (0x5f)
434 #define M6812_OP_STS_EXT (0x7f)
435 #define M6812_OP_LEAS (0x1b)
436 #define M6812_OP_PSHX (0x34)
437 #define M6812_OP_PSHY (0x35)
439 /* Operand extraction. */
440 #define OP_DIRECT (0x100) /* 8-byte direct addressing. */
441 #define OP_IMM_LOW (0x200) /* Low part of 16-bit constant/address. */
442 #define OP_IMM_HIGH (0x300) /* High part of 16-bit constant/address. */
443 #define OP_PBYTE (0x400) /* 68HC12 indexed operand. */
445 /* Identification of the sequence. */
449 P_SAVE_REG
, /* Save a register on the stack. */
450 P_SET_FRAME
, /* Setup the frame pointer. */
451 P_LOCAL_1
, /* Allocate 1 byte for locals. */
452 P_LOCAL_2
, /* Allocate 2 bytes for locals. */
453 P_LOCAL_N
/* Allocate N bytes for locals. */
456 struct insn_sequence
{
457 enum m6811_seq_type type
;
459 unsigned short code
[MAX_CODES
];
462 /* Sequence of instructions in the 68HC11 function prologue. */
463 static struct insn_sequence m6811_prologue
[] = {
464 /* Sequences to save a soft-register. */
465 { P_SAVE_REG
, 3, { M6811_OP_LDX
, OP_DIRECT
,
467 { P_SAVE_REG
, 5, { M6811_OP_PAGE2
, M6811_OP_LDX
, OP_DIRECT
,
468 M6811_OP_PAGE2
, M6811_OP_PSHX
} },
469 { P_SAVE_REG
, 4, { M6811_OP_LDX_EXT
, OP_IMM_HIGH
, OP_IMM_LOW
,
471 { P_SAVE_REG
, 6, { M6811_OP_PAGE2
, M6811_OP_LDX_EXT
, OP_IMM_HIGH
, OP_IMM_LOW
,
472 M6811_OP_PAGE2
, M6811_OP_PSHX
} },
474 /* Sequences to allocate local variables. */
475 { P_LOCAL_N
, 7, { M6811_OP_TSX
,
477 M6811_OP_ADDD
, OP_IMM_HIGH
, OP_IMM_LOW
,
480 { P_LOCAL_N
, 11, { M6811_OP_PAGE2
, M6811_OP_TSX
,
481 M6811_OP_PAGE2
, M6811_OP_XGDX
,
482 M6811_OP_ADDD
, OP_IMM_HIGH
, OP_IMM_LOW
,
483 M6811_OP_PAGE2
, M6811_OP_XGDX
,
484 M6811_OP_PAGE2
, M6811_OP_TXS
} },
485 { P_LOCAL_1
, 1, { M6811_OP_DES
} },
486 { P_LOCAL_2
, 1, { M6811_OP_PSHX
} },
487 { P_LOCAL_2
, 2, { M6811_OP_PAGE2
, M6811_OP_PSHX
} },
489 /* Initialize the frame pointer. */
490 { P_SET_FRAME
, 2, { M6811_OP_STS
, OP_DIRECT
} },
491 { P_SET_FRAME
, 3, { M6811_OP_STS_EXT
, OP_IMM_HIGH
, OP_IMM_LOW
} },
496 /* Sequence of instructions in the 68HC12 function prologue. */
497 static struct insn_sequence m6812_prologue
[] = {
498 { P_SAVE_REG
, 5, { M6812_OP_PAGE2
, M6812_OP_MOVW
, M6812_PB_PSHW
,
499 OP_IMM_HIGH
, OP_IMM_LOW
} },
500 { P_SET_FRAME
, 2, { M6812_OP_STS
, OP_DIRECT
} },
501 { P_SET_FRAME
, 3, { M6812_OP_STS_EXT
, OP_IMM_HIGH
, OP_IMM_LOW
} },
502 { P_LOCAL_N
, 2, { M6812_OP_LEAS
, OP_PBYTE
} },
503 { P_LOCAL_2
, 1, { M6812_OP_PSHX
} },
504 { P_LOCAL_2
, 1, { M6812_OP_PSHY
} },
509 /* Analyze the sequence of instructions starting at the given address.
510 Returns a pointer to the sequence when it is recognized and
511 the optional value (constant/address) associated with it. */
512 static struct insn_sequence
*
513 m68hc11_analyze_instruction (struct gdbarch
*gdbarch
,
514 struct insn_sequence
*seq
, CORE_ADDR pc
,
517 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
518 unsigned char buffer
[MAX_CODES
];
525 for (; seq
->type
!= P_LAST
; seq
++)
528 for (j
= 0; j
< seq
->length
; j
++)
532 buffer
[bufsize
] = read_memory_unsigned_integer (pc
+ bufsize
,
536 /* Continue while we match the opcode. */
537 if (seq
->code
[j
] == buffer
[j
])
540 if ((seq
->code
[j
] & 0xf00) == 0)
543 /* Extract a sequence parameter (address or constant). */
544 switch (seq
->code
[j
])
547 cur_val
= (CORE_ADDR
) buffer
[j
];
551 cur_val
= cur_val
& 0x0ff;
552 cur_val
|= (buffer
[j
] << 8);
557 cur_val
|= buffer
[j
];
561 if ((buffer
[j
] & 0xE0) == 0x80)
563 v
= buffer
[j
] & 0x1f;
567 else if ((buffer
[j
] & 0xfe) == 0xf0)
569 v
= read_memory_unsigned_integer (pc
+ j
+ 1, 1, byte_order
);
573 else if (buffer
[j
] == 0xf2)
575 v
= read_memory_unsigned_integer (pc
+ j
+ 1, 2, byte_order
);
582 /* We have a full match. */
583 if (j
== seq
->length
)
592 /* Return the instruction that the function at the PC is using. */
593 static enum insn_return_kind
594 m68hc11_get_return_insn (CORE_ADDR pc
)
596 struct bound_minimal_symbol sym
;
598 /* A flag indicating that this is a STO_M68HC12_FAR or STO_M68HC12_INTERRUPT
599 function is stored by elfread.c in the high bit of the info field.
600 Use this to decide which instruction the function uses to return. */
601 sym
= lookup_minimal_symbol_by_pc (pc
);
605 if (MSYMBOL_IS_RTC (sym
.minsym
))
607 else if (MSYMBOL_IS_RTI (sym
.minsym
))
613 /* Analyze the function prologue to find some information
615 - the PC of the first line (for m68hc11_skip_prologue)
616 - the offset of the previous frame saved address (from current frame)
617 - the soft registers which are pushed. */
619 m68hc11_scan_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
,
620 CORE_ADDR current_pc
, struct m68hc11_unwind_cache
*info
)
625 int found_frame_point
;
628 struct insn_sequence
*seq_table
;
632 if (pc
>= current_pc
)
637 m68hc11_initialize_register_info ();
644 m68gc11_gdbarch_tdep
*tdep
= (m68gc11_gdbarch_tdep
*) gdbarch_tdep (gdbarch
);
645 seq_table
= tdep
->prologue
;
647 /* The 68hc11 stack is as follows:
663 +-----------+ <--- current frame
666 With most processors (like 68K) the previous frame can be computed
667 easily because it is always at a fixed offset (see link/unlink).
668 That is, locals are accessed with negative offsets, arguments are
669 accessed with positive ones. Since 68hc11 only supports offsets
670 in the range [0..255], the frame is defined at the bottom of
671 locals (see picture).
673 The purpose of the analysis made here is to find out the size
674 of locals in this function. An alternative to this is to use
675 DWARF2 info. This would be better but I don't know how to
676 access dwarf2 debug from this function.
678 Walk from the function entry point to the point where we save
679 the frame. While walking instructions, compute the size of bytes
680 which are pushed. This gives us the index to access the previous
683 We limit the search to 128 bytes so that the algorithm is bounded
684 in case of random and wrong code. We also stop and abort if
685 we find an instruction which is not supposed to appear in the
686 prologue (as generated by gcc 2.95, 2.96). */
689 found_frame_point
= 0;
692 while (!done
&& pc
+ 2 < func_end
)
694 struct insn_sequence
*seq
;
697 seq
= m68hc11_analyze_instruction (gdbarch
, seq_table
, pc
, &val
);
701 /* If we are within the instruction group, we can't advance the
702 pc nor the stack offset. Otherwise the caller's stack computed
703 from the current stack can be wrong. */
704 if (pc
+ seq
->length
> current_pc
)
707 pc
= pc
+ seq
->length
;
708 if (seq
->type
== P_SAVE_REG
)
710 if (found_frame_point
)
712 saved_reg
= m68hc11_which_soft_register (val
);
717 if (info
->saved_regs
)
718 info
->saved_regs
[saved_reg
].set_addr (save_addr
);
725 else if (seq
->type
== P_SET_FRAME
)
727 found_frame_point
= 1;
730 else if (seq
->type
== P_LOCAL_1
)
734 else if (seq
->type
== P_LOCAL_2
)
738 else if (seq
->type
== P_LOCAL_N
)
740 /* Stack pointer is decremented for the allocation. */
742 size
-= (int) (val
) | 0xffff0000;
747 if (found_frame_point
== 0)
748 info
->sp_offset
= size
;
750 info
->sp_offset
= -1;
755 m68hc11_skip_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
)
757 CORE_ADDR func_addr
, func_end
;
758 struct symtab_and_line sal
;
759 struct m68hc11_unwind_cache tmp_cache
= { 0 };
761 /* If we have line debugging information, then the end of the
762 prologue should be the first assembly instruction of the
763 first source line. */
764 if (find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
766 sal
= find_pc_line (func_addr
, 0);
767 if (sal
.end
&& sal
.end
< func_end
)
771 pc
= m68hc11_scan_prologue (gdbarch
, pc
, (CORE_ADDR
) -1, &tmp_cache
);
775 /* Put here the code to store, into fi->saved_regs, the addresses of
776 the saved registers of frame described by FRAME_INFO. This
777 includes special registers such as pc and fp saved in special ways
778 in the stack frame. sp is even more special: the address we return
779 for it IS the sp for the next frame. */
781 static struct m68hc11_unwind_cache
*
782 m68hc11_frame_unwind_cache (struct frame_info
*this_frame
,
783 void **this_prologue_cache
)
785 struct gdbarch
*gdbarch
= get_frame_arch (this_frame
);
788 struct m68hc11_unwind_cache
*info
;
789 CORE_ADDR current_pc
;
792 if ((*this_prologue_cache
))
793 return (struct m68hc11_unwind_cache
*) (*this_prologue_cache
);
795 info
= FRAME_OBSTACK_ZALLOC (struct m68hc11_unwind_cache
);
796 (*this_prologue_cache
) = info
;
797 info
->saved_regs
= trad_frame_alloc_saved_regs (this_frame
);
799 info
->pc
= get_frame_func (this_frame
);
802 info
->return_kind
= m68hc11_get_return_insn (info
->pc
);
804 /* The SP was moved to the FP. This indicates that a new frame
805 was created. Get THIS frame's FP value by unwinding it from
807 this_base
= get_frame_register_unsigned (this_frame
, SOFT_FP_REGNUM
);
814 current_pc
= get_frame_pc (this_frame
);
816 m68hc11_scan_prologue (gdbarch
, info
->pc
, current_pc
, info
);
818 info
->saved_regs
[HARD_PC_REGNUM
].set_addr (info
->size
);
820 if (info
->sp_offset
!= (CORE_ADDR
) -1)
822 info
->saved_regs
[HARD_PC_REGNUM
].set_addr (info
->sp_offset
);
823 this_base
= get_frame_register_unsigned (this_frame
, HARD_SP_REGNUM
);
824 prev_sp
= this_base
+ info
->sp_offset
+ 2;
825 this_base
+= stack_correction (gdbarch
);
829 /* The FP points at the last saved register. Adjust the FP back
830 to before the first saved register giving the SP. */
831 prev_sp
= this_base
+ info
->size
+ 2;
833 this_base
+= stack_correction (gdbarch
);
834 if (soft_regs
[SOFT_FP_REGNUM
].name
)
835 info
->saved_regs
[SOFT_FP_REGNUM
].set_addr (info
->size
- 2);
838 if (info
->return_kind
== RETURN_RTC
)
841 info
->saved_regs
[HARD_PAGE_REGNUM
].set_addr (info
->size
);
842 info
->saved_regs
[HARD_PC_REGNUM
].set_addr (info
->size
+ 1);
844 else if (info
->return_kind
== RETURN_RTI
)
847 info
->saved_regs
[HARD_CCR_REGNUM
].set_addr (info
->size
);
848 info
->saved_regs
[HARD_D_REGNUM
].set_addr (info
->size
+ 1);
849 info
->saved_regs
[HARD_X_REGNUM
].set_addr (info
->size
+ 3);
850 info
->saved_regs
[HARD_Y_REGNUM
].set_addr (info
->size
+ 5);
851 info
->saved_regs
[HARD_PC_REGNUM
].set_addr (info
->size
+ 7);
854 /* Add 1 here to adjust for the post-decrement nature of the push
856 info
->prev_sp
= prev_sp
;
858 info
->base
= this_base
;
860 /* Adjust all the saved registers so that they contain addresses and not
862 for (i
= 0; i
< gdbarch_num_cooked_regs (gdbarch
); i
++)
863 if (info
->saved_regs
[i
].is_addr ())
865 info
->saved_regs
[i
].set_addr (info
->saved_regs
[i
].addr () + this_base
);
868 /* The previous frame's SP needed to be computed. Save the computed
870 info
->saved_regs
[HARD_SP_REGNUM
].set_value (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
*this_frame
,
880 void **this_prologue_cache
,
881 struct frame_id
*this_id
)
883 struct m68hc11_unwind_cache
*info
884 = m68hc11_frame_unwind_cache (this_frame
, this_prologue_cache
);
889 /* The FUNC is easy. */
890 func
= get_frame_func (this_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
);
903 static struct value
*
904 m68hc11_frame_prev_register (struct frame_info
*this_frame
,
905 void **this_prologue_cache
, int regnum
)
908 struct m68hc11_unwind_cache
*info
909 = m68hc11_frame_unwind_cache (this_frame
, this_prologue_cache
);
911 value
= trad_frame_get_prev_register (this_frame
, info
->saved_regs
, regnum
);
913 /* Take into account the 68HC12 specific call (PC + page). */
914 if (regnum
== HARD_PC_REGNUM
915 && info
->return_kind
== RETURN_RTC
916 && use_page_register (get_frame_arch (this_frame
)))
918 CORE_ADDR pc
= value_as_long (value
);
919 if (pc
>= 0x08000 && pc
< 0x0c000)
923 release_value (value
);
925 value
= trad_frame_get_prev_register (this_frame
, info
->saved_regs
,
927 page
= value_as_long (value
);
928 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
= {
944 default_frame_unwind_stop_reason
,
945 m68hc11_frame_this_id
,
946 m68hc11_frame_prev_register
,
948 default_frame_sniffer
952 m68hc11_frame_base_address (struct frame_info
*this_frame
, void **this_cache
)
954 struct m68hc11_unwind_cache
*info
955 = m68hc11_frame_unwind_cache (this_frame
, this_cache
);
961 m68hc11_frame_args_address (struct frame_info
*this_frame
, void **this_cache
)
964 struct m68hc11_unwind_cache
*info
965 = m68hc11_frame_unwind_cache (this_frame
, this_cache
);
967 addr
= info
->base
+ info
->size
;
968 if (info
->return_kind
== RETURN_RTC
)
970 else if (info
->return_kind
== RETURN_RTI
)
976 static const struct frame_base m68hc11_frame_base
= {
977 &m68hc11_frame_unwind
,
978 m68hc11_frame_base_address
,
979 m68hc11_frame_base_address
,
980 m68hc11_frame_args_address
983 /* Assuming THIS_FRAME is a dummy, return the frame ID of that dummy
984 frame. The frame ID's base needs to match the TOS value saved by
985 save_dummy_frame_tos(), and the PC match the dummy frame's breakpoint. */
987 static struct frame_id
988 m68hc11_dummy_id (struct gdbarch
*gdbarch
, struct frame_info
*this_frame
)
991 CORE_ADDR pc
= get_frame_pc (this_frame
);
993 tos
= get_frame_register_unsigned (this_frame
, SOFT_FP_REGNUM
);
995 return frame_id_build (tos
, pc
);
999 /* Get and print the register from the given frame. */
1001 m68hc11_print_register (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1002 struct frame_info
*frame
, int regno
)
1006 if (regno
== HARD_PC_REGNUM
|| regno
== HARD_SP_REGNUM
1007 || regno
== SOFT_FP_REGNUM
|| regno
== M68HC12_HARD_PC_REGNUM
)
1008 rval
= get_frame_register_unsigned (frame
, regno
);
1010 rval
= get_frame_register_signed (frame
, regno
);
1012 if (regno
== HARD_A_REGNUM
|| regno
== HARD_B_REGNUM
1013 || regno
== HARD_CCR_REGNUM
|| regno
== HARD_PAGE_REGNUM
)
1015 fprintf_filtered (file
, "0x%02x ", (unsigned char) rval
);
1016 if (regno
!= HARD_CCR_REGNUM
)
1017 print_longest (file
, 'd', 1, rval
);
1021 m68gc11_gdbarch_tdep
*tdep
1022 = (m68gc11_gdbarch_tdep
*) gdbarch_tdep (gdbarch
);
1024 if (regno
== HARD_PC_REGNUM
&& tdep
->use_page_register
)
1028 page
= get_frame_register_unsigned (frame
, HARD_PAGE_REGNUM
);
1029 fprintf_filtered (file
, "0x%02x:%04x ", (unsigned) page
,
1034 fprintf_filtered (file
, "0x%04x ", (unsigned) rval
);
1035 if (regno
!= HARD_PC_REGNUM
&& regno
!= HARD_SP_REGNUM
1036 && regno
!= SOFT_FP_REGNUM
&& regno
!= M68HC12_HARD_PC_REGNUM
)
1037 print_longest (file
, 'd', 1, rval
);
1041 if (regno
== HARD_CCR_REGNUM
)
1045 unsigned char l
= rval
& 0xff;
1047 fprintf_filtered (file
, "%c%c%c%c%c%c%c%c ",
1048 l
& M6811_S_BIT
? 'S' : '-',
1049 l
& M6811_X_BIT
? 'X' : '-',
1050 l
& M6811_H_BIT
? 'H' : '-',
1051 l
& M6811_I_BIT
? 'I' : '-',
1052 l
& M6811_N_BIT
? 'N' : '-',
1053 l
& M6811_Z_BIT
? 'Z' : '-',
1054 l
& M6811_V_BIT
? 'V' : '-',
1055 l
& M6811_C_BIT
? 'C' : '-');
1056 N
= (l
& M6811_N_BIT
) != 0;
1057 Z
= (l
& M6811_Z_BIT
) != 0;
1058 V
= (l
& M6811_V_BIT
) != 0;
1059 C
= (l
& M6811_C_BIT
) != 0;
1061 /* Print flags following the h8300. */
1063 fprintf_filtered (file
, "u> ");
1064 else if ((C
| Z
) == 1)
1065 fprintf_filtered (file
, "u<= ");
1067 fprintf_filtered (file
, "u< ");
1070 fprintf_filtered (file
, "!= ");
1072 fprintf_filtered (file
, "== ");
1075 fprintf_filtered (file
, ">= ");
1077 fprintf_filtered (file
, "< ");
1079 if ((Z
| (N
^ V
)) == 0)
1080 fprintf_filtered (file
, "> ");
1082 fprintf_filtered (file
, "<= ");
1086 /* Same as 'info reg' but prints the registers in a different way. */
1088 m68hc11_print_registers_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1089 struct frame_info
*frame
, int regno
, int cpregs
)
1093 const char *name
= gdbarch_register_name (gdbarch
, regno
);
1095 if (!name
|| !*name
)
1098 fprintf_filtered (file
, "%-10s ", name
);
1099 m68hc11_print_register (gdbarch
, file
, frame
, regno
);
1100 fprintf_filtered (file
, "\n");
1106 fprintf_filtered (file
, "PC=");
1107 m68hc11_print_register (gdbarch
, file
, frame
, HARD_PC_REGNUM
);
1109 fprintf_filtered (file
, " SP=");
1110 m68hc11_print_register (gdbarch
, file
, frame
, HARD_SP_REGNUM
);
1112 fprintf_filtered (file
, " FP=");
1113 m68hc11_print_register (gdbarch
, file
, frame
, SOFT_FP_REGNUM
);
1115 fprintf_filtered (file
, "\nCCR=");
1116 m68hc11_print_register (gdbarch
, file
, frame
, HARD_CCR_REGNUM
);
1118 fprintf_filtered (file
, "\nD=");
1119 m68hc11_print_register (gdbarch
, file
, frame
, HARD_D_REGNUM
);
1121 fprintf_filtered (file
, " X=");
1122 m68hc11_print_register (gdbarch
, file
, frame
, HARD_X_REGNUM
);
1124 fprintf_filtered (file
, " Y=");
1125 m68hc11_print_register (gdbarch
, file
, frame
, HARD_Y_REGNUM
);
1127 m68gc11_gdbarch_tdep
*tdep
= (m68gc11_gdbarch_tdep
*) gdbarch_tdep (gdbarch
);
1129 if (tdep
->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 function_call_return_method return_method
,
1161 CORE_ADDR struct_addr
)
1163 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
1165 int first_stack_argnum
;
1167 const gdb_byte
*val
;
1170 first_stack_argnum
= 0;
1171 if (return_method
== return_method_struct
)
1172 regcache_cooked_write_unsigned (regcache
, HARD_D_REGNUM
, struct_addr
);
1175 type
= value_type (args
[0]);
1177 /* First argument is passed in D and X registers. */
1178 if (TYPE_LENGTH (type
) <= 4)
1182 v
= extract_unsigned_integer (value_contents (args
[0]).data (),
1183 TYPE_LENGTH (type
), byte_order
);
1184 first_stack_argnum
= 1;
1186 regcache_cooked_write_unsigned (regcache
, HARD_D_REGNUM
, v
);
1187 if (TYPE_LENGTH (type
) > 2)
1190 regcache_cooked_write_unsigned (regcache
, HARD_X_REGNUM
, v
);
1195 for (argnum
= nargs
- 1; argnum
>= first_stack_argnum
; argnum
--)
1197 type
= value_type (args
[argnum
]);
1199 if (TYPE_LENGTH (type
) & 1)
1201 static gdb_byte zero
= 0;
1204 write_memory (sp
, &zero
, 1);
1206 val
= value_contents (args
[argnum
]).data ();
1207 sp
-= TYPE_LENGTH (type
);
1208 write_memory (sp
, val
, TYPE_LENGTH (type
));
1211 /* Store return address. */
1213 store_unsigned_integer (buf
, 2, byte_order
, bp_addr
);
1214 write_memory (sp
, buf
, 2);
1216 /* Finally, update the stack pointer... */
1217 sp
-= stack_correction (gdbarch
);
1218 regcache_cooked_write_unsigned (regcache
, HARD_SP_REGNUM
, sp
);
1220 /* ...and fake a frame pointer. */
1221 regcache_cooked_write_unsigned (regcache
, SOFT_FP_REGNUM
, sp
);
1223 /* DWARF2/GCC uses the stack address *before* the function call as a
1229 /* Return the GDB type object for the "standard" data type
1230 of data in register N. */
1232 static struct type
*
1233 m68hc11_register_type (struct gdbarch
*gdbarch
, int reg_nr
)
1237 case HARD_PAGE_REGNUM
:
1240 case HARD_CCR_REGNUM
:
1241 return builtin_type (gdbarch
)->builtin_uint8
;
1243 case M68HC12_HARD_PC_REGNUM
:
1244 return builtin_type (gdbarch
)->builtin_uint32
;
1247 return builtin_type (gdbarch
)->builtin_uint16
;
1252 m68hc11_store_return_value (struct type
*type
, struct regcache
*regcache
,
1253 const gdb_byte
*valbuf
)
1257 len
= TYPE_LENGTH (type
);
1259 /* First argument is passed in D and X registers. */
1261 regcache
->raw_write_part (HARD_D_REGNUM
, 2 - len
, len
, valbuf
);
1264 regcache
->raw_write_part (HARD_X_REGNUM
, 4 - len
, len
- 2, valbuf
);
1265 regcache
->raw_write (HARD_D_REGNUM
, valbuf
+ (len
- 2));
1268 error (_("return of value > 4 is not supported."));
1272 /* Given a return value in `regcache' with a type `type',
1273 extract and copy its value into `valbuf'. */
1276 m68hc11_extract_return_value (struct type
*type
, struct regcache
*regcache
,
1279 gdb_byte buf
[M68HC11_REG_SIZE
];
1281 regcache
->raw_read (HARD_D_REGNUM
, buf
);
1282 switch (TYPE_LENGTH (type
))
1285 memcpy (valbuf
, buf
+ 1, 1);
1289 memcpy (valbuf
, buf
, 2);
1293 memcpy ((char*) valbuf
+ 1, buf
, 2);
1294 regcache
->raw_read (HARD_X_REGNUM
, buf
);
1295 memcpy (valbuf
, buf
+ 1, 1);
1299 memcpy ((char*) valbuf
+ 2, buf
, 2);
1300 regcache
->raw_read (HARD_X_REGNUM
, buf
);
1301 memcpy (valbuf
, buf
, 2);
1305 error (_("bad size for return value"));
1309 static enum return_value_convention
1310 m68hc11_return_value (struct gdbarch
*gdbarch
, struct value
*function
,
1311 struct type
*valtype
, struct regcache
*regcache
,
1312 gdb_byte
*readbuf
, const gdb_byte
*writebuf
)
1314 if (valtype
->code () == TYPE_CODE_STRUCT
1315 || valtype
->code () == TYPE_CODE_UNION
1316 || valtype
->code () == TYPE_CODE_ARRAY
1317 || TYPE_LENGTH (valtype
) > 4)
1318 return RETURN_VALUE_STRUCT_CONVENTION
;
1321 if (readbuf
!= NULL
)
1322 m68hc11_extract_return_value (valtype
, regcache
, readbuf
);
1323 if (writebuf
!= NULL
)
1324 m68hc11_store_return_value (valtype
, regcache
, writebuf
);
1325 return RETURN_VALUE_REGISTER_CONVENTION
;
1329 /* Test whether the ELF symbol corresponds to a function using rtc or
1333 m68hc11_elf_make_msymbol_special (asymbol
*sym
, struct minimal_symbol
*msym
)
1335 unsigned char flags
;
1337 flags
= ((elf_symbol_type
*)sym
)->internal_elf_sym
.st_other
;
1338 if (flags
& STO_M68HC12_FAR
)
1339 MSYMBOL_SET_RTC (msym
);
1340 if (flags
& STO_M68HC12_INTERRUPT
)
1341 MSYMBOL_SET_RTI (msym
);
1345 /* 68HC11/68HC12 register groups.
1346 Identify real hard registers and soft registers used by gcc. */
1348 static struct reggroup
*m68hc11_soft_reggroup
;
1349 static struct reggroup
*m68hc11_hard_reggroup
;
1352 m68hc11_init_reggroups (void)
1354 m68hc11_hard_reggroup
= reggroup_new ("hard", USER_REGGROUP
);
1355 m68hc11_soft_reggroup
= reggroup_new ("soft", USER_REGGROUP
);
1359 m68hc11_add_reggroups (struct gdbarch
*gdbarch
)
1361 reggroup_add (gdbarch
, m68hc11_hard_reggroup
);
1362 reggroup_add (gdbarch
, m68hc11_soft_reggroup
);
1363 reggroup_add (gdbarch
, general_reggroup
);
1364 reggroup_add (gdbarch
, float_reggroup
);
1365 reggroup_add (gdbarch
, all_reggroup
);
1366 reggroup_add (gdbarch
, save_reggroup
);
1367 reggroup_add (gdbarch
, restore_reggroup
);
1368 reggroup_add (gdbarch
, vector_reggroup
);
1369 reggroup_add (gdbarch
, system_reggroup
);
1373 m68hc11_register_reggroup_p (struct gdbarch
*gdbarch
, int regnum
,
1374 struct reggroup
*group
)
1376 /* We must save the real hard register as well as gcc
1377 soft registers including the frame pointer. */
1378 if (group
== save_reggroup
|| group
== restore_reggroup
)
1380 return (regnum
<= gdbarch_num_regs (gdbarch
)
1381 || ((regnum
== SOFT_FP_REGNUM
1382 || regnum
== SOFT_TMP_REGNUM
1383 || regnum
== SOFT_ZS_REGNUM
1384 || regnum
== SOFT_XY_REGNUM
)
1385 && m68hc11_register_name (gdbarch
, regnum
)));
1388 /* Group to identify gcc soft registers (d1..dN). */
1389 if (group
== m68hc11_soft_reggroup
)
1391 return regnum
>= SOFT_D1_REGNUM
1392 && m68hc11_register_name (gdbarch
, regnum
);
1395 if (group
== m68hc11_hard_reggroup
)
1397 return regnum
== HARD_PC_REGNUM
|| regnum
== HARD_SP_REGNUM
1398 || regnum
== HARD_X_REGNUM
|| regnum
== HARD_D_REGNUM
1399 || regnum
== HARD_Y_REGNUM
|| regnum
== HARD_CCR_REGNUM
;
1401 return default_register_reggroup_p (gdbarch
, regnum
, group
);
1404 static struct gdbarch
*
1405 m68hc11_gdbarch_init (struct gdbarch_info info
,
1406 struct gdbarch_list
*arches
)
1408 struct gdbarch
*gdbarch
;
1411 soft_reg_initialized
= 0;
1413 /* Extract the elf_flags if available. */
1414 if (info
.abfd
!= NULL
1415 && bfd_get_flavour (info
.abfd
) == bfd_target_elf_flavour
)
1416 elf_flags
= elf_elfheader (info
.abfd
)->e_flags
;
1420 /* Try to find a pre-existing architecture. */
1421 for (arches
= gdbarch_list_lookup_by_info (arches
, &info
);
1423 arches
= gdbarch_list_lookup_by_info (arches
->next
, &info
))
1425 m68gc11_gdbarch_tdep
*tdep
1426 = (m68gc11_gdbarch_tdep
*) gdbarch_tdep (arches
->gdbarch
);
1428 if (tdep
->elf_flags
!= elf_flags
)
1431 return arches
->gdbarch
;
1434 /* Need a new architecture. Fill in a target specific vector. */
1435 m68gc11_gdbarch_tdep
*tdep
= new m68gc11_gdbarch_tdep
;
1436 gdbarch
= gdbarch_alloc (&info
, tdep
);
1437 tdep
->elf_flags
= elf_flags
;
1439 switch (info
.bfd_arch_info
->arch
)
1441 case bfd_arch_m68hc11
:
1442 tdep
->stack_correction
= 1;
1443 tdep
->use_page_register
= 0;
1444 tdep
->prologue
= m6811_prologue
;
1445 set_gdbarch_addr_bit (gdbarch
, 16);
1446 set_gdbarch_num_pseudo_regs (gdbarch
, M68HC11_NUM_PSEUDO_REGS
);
1447 set_gdbarch_pc_regnum (gdbarch
, HARD_PC_REGNUM
);
1448 set_gdbarch_num_regs (gdbarch
, M68HC11_NUM_REGS
);
1451 case bfd_arch_m68hc12
:
1452 tdep
->stack_correction
= 0;
1453 tdep
->use_page_register
= elf_flags
& E_M68HC12_BANKS
;
1454 tdep
->prologue
= m6812_prologue
;
1455 set_gdbarch_addr_bit (gdbarch
, elf_flags
& E_M68HC12_BANKS
? 32 : 16);
1456 set_gdbarch_num_pseudo_regs (gdbarch
,
1457 elf_flags
& E_M68HC12_BANKS
1458 ? M68HC12_NUM_PSEUDO_REGS
1459 : M68HC11_NUM_PSEUDO_REGS
);
1460 set_gdbarch_pc_regnum (gdbarch
, elf_flags
& E_M68HC12_BANKS
1461 ? M68HC12_HARD_PC_REGNUM
: HARD_PC_REGNUM
);
1462 set_gdbarch_num_regs (gdbarch
, elf_flags
& E_M68HC12_BANKS
1463 ? M68HC12_NUM_REGS
: M68HC11_NUM_REGS
);
1470 /* Initially set everything according to the ABI.
1471 Use 16-bit integers since it will be the case for most
1472 programs. The size of these types should normally be set
1473 according to the dwarf2 debug information. */
1474 set_gdbarch_short_bit (gdbarch
, 16);
1475 set_gdbarch_int_bit (gdbarch
, elf_flags
& E_M68HC11_I32
? 32 : 16);
1476 set_gdbarch_float_bit (gdbarch
, 32);
1477 if (elf_flags
& E_M68HC11_F64
)
1479 set_gdbarch_double_bit (gdbarch
, 64);
1480 set_gdbarch_double_format (gdbarch
, floatformats_ieee_double
);
1484 set_gdbarch_double_bit (gdbarch
, 32);
1485 set_gdbarch_double_format (gdbarch
, floatformats_ieee_single
);
1487 set_gdbarch_long_double_bit (gdbarch
, 64);
1488 set_gdbarch_long_bit (gdbarch
, 32);
1489 set_gdbarch_ptr_bit (gdbarch
, 16);
1490 set_gdbarch_long_long_bit (gdbarch
, 64);
1492 /* Characters are unsigned. */
1493 set_gdbarch_char_signed (gdbarch
, 0);
1495 /* Set register info. */
1496 set_gdbarch_fp0_regnum (gdbarch
, -1);
1498 set_gdbarch_sp_regnum (gdbarch
, HARD_SP_REGNUM
);
1499 set_gdbarch_register_name (gdbarch
, m68hc11_register_name
);
1500 set_gdbarch_register_type (gdbarch
, m68hc11_register_type
);
1501 set_gdbarch_pseudo_register_read (gdbarch
, m68hc11_pseudo_register_read
);
1502 set_gdbarch_pseudo_register_write (gdbarch
, m68hc11_pseudo_register_write
);
1504 set_gdbarch_push_dummy_call (gdbarch
, m68hc11_push_dummy_call
);
1506 set_gdbarch_return_value (gdbarch
, m68hc11_return_value
);
1507 set_gdbarch_skip_prologue (gdbarch
, m68hc11_skip_prologue
);
1508 set_gdbarch_inner_than (gdbarch
, core_addr_lessthan
);
1509 set_gdbarch_breakpoint_kind_from_pc (gdbarch
,
1510 m68hc11_breakpoint::kind_from_pc
);
1511 set_gdbarch_sw_breakpoint_from_kind (gdbarch
,
1512 m68hc11_breakpoint::bp_from_kind
);
1514 m68hc11_add_reggroups (gdbarch
);
1515 set_gdbarch_register_reggroup_p (gdbarch
, m68hc11_register_reggroup_p
);
1516 set_gdbarch_print_registers_info (gdbarch
, m68hc11_print_registers_info
);
1518 /* Hook in the DWARF CFI frame unwinder. */
1519 dwarf2_append_unwinders (gdbarch
);
1521 frame_unwind_append_unwinder (gdbarch
, &m68hc11_frame_unwind
);
1522 frame_base_set_default (gdbarch
, &m68hc11_frame_base
);
1524 /* Methods for saving / extracting a dummy frame's ID. The ID's
1525 stack address must match the SP value returned by
1526 PUSH_DUMMY_CALL, and saved by generic_save_dummy_frame_tos. */
1527 set_gdbarch_dummy_id (gdbarch
, m68hc11_dummy_id
);
1529 /* Minsymbol frobbing. */
1530 set_gdbarch_elf_make_msymbol_special (gdbarch
,
1531 m68hc11_elf_make_msymbol_special
);
1533 set_gdbarch_believe_pcc_promotion (gdbarch
, 1);
1538 void _initialize_m68hc11_tdep ();
1540 _initialize_m68hc11_tdep ()
1542 register_gdbarch_init (bfd_arch_m68hc11
, m68hc11_gdbarch_init
);
1543 register_gdbarch_init (bfd_arch_m68hc12
, m68hc11_gdbarch_init
);
1544 m68hc11_init_reggroups ();