1 /* Target-dependent code for Motorola 68HC11 & 68HC12
2 Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
3 Contributed by Stephane Carrez, stcarrez@nerim.fr
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
24 #include "frame-unwind.h"
25 #include "frame-base.h"
26 #include "dwarf2-frame.h"
27 #include "trad-frame.h"
32 #include "gdb_string.h"
38 #include "arch-utils.h"
40 #include "reggroups.h"
43 #include "opcode/m68hc11.h"
44 #include "elf/m68hc11.h"
47 /* Macros for setting and testing a bit in a minimal symbol.
48 For 68HC11/68HC12 we have two flags that tell which return
49 type the function is using. This is used for prologue and frame
50 analysis to compute correct stack frame layout.
52 The MSB of the minimal symbol's "info" field is used for this purpose.
53 This field is already being used to store the symbol size, so the
54 assumption is that the symbol size cannot exceed 2^30.
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.
60 MSYMBOL_SIZE Returns the size of the minimal symbol,
61 i.e. the "info" field with the "special" bit
64 #define MSYMBOL_SET_RTC(msym) \
65 MSYMBOL_INFO (msym) = (char *) (((long) MSYMBOL_INFO (msym)) \
68 #define MSYMBOL_SET_RTI(msym) \
69 MSYMBOL_INFO (msym) = (char *) (((long) MSYMBOL_INFO (msym)) \
72 #define MSYMBOL_IS_RTC(msym) \
73 (((long) MSYMBOL_INFO (msym) & 0x80000000) != 0)
75 #define MSYMBOL_IS_RTI(msym) \
76 (((long) MSYMBOL_INFO (msym) & 0x40000000) != 0)
78 #define MSYMBOL_SIZE(msym) \
79 ((long) MSYMBOL_INFO (msym) & 0x3fffffff)
81 enum insn_return_kind
{
88 /* Register numbers of various important registers.
89 Note that some of these values are "real" register numbers,
90 and correspond to the general registers of the machine,
91 and some are "phony" register numbers which are too large
92 to be actual register numbers as far as the user is concerned
93 but do serve to get the desired values when passed to read_register. */
95 #define HARD_X_REGNUM 0
96 #define HARD_D_REGNUM 1
97 #define HARD_Y_REGNUM 2
98 #define HARD_SP_REGNUM 3
99 #define HARD_PC_REGNUM 4
101 #define HARD_A_REGNUM 5
102 #define HARD_B_REGNUM 6
103 #define HARD_CCR_REGNUM 7
105 /* 68HC12 page number register.
106 Note: to keep a compatibility with gcc register naming, we must
107 not have to rename FP and other soft registers. The page register
108 is a real hard register and must therefore be counted by NUM_REGS.
109 For this it has the same number as Z register (which is not used). */
110 #define HARD_PAGE_REGNUM 8
111 #define M68HC11_LAST_HARD_REG (HARD_PAGE_REGNUM)
113 /* Z is replaced by X or Y by gcc during machine reorg.
114 ??? There is no way to get it and even know whether
115 it's in X or Y or in ZS. */
116 #define SOFT_Z_REGNUM 8
118 /* Soft registers. These registers are special. There are treated
119 like normal hard registers by gcc and gdb (ie, within dwarf2 info).
120 They are physically located in memory. */
121 #define SOFT_FP_REGNUM 9
122 #define SOFT_TMP_REGNUM 10
123 #define SOFT_ZS_REGNUM 11
124 #define SOFT_XY_REGNUM 12
125 #define SOFT_UNUSED_REGNUM 13
126 #define SOFT_D1_REGNUM 14
127 #define SOFT_D32_REGNUM (SOFT_D1_REGNUM+31)
128 #define M68HC11_MAX_SOFT_REGS 32
130 #define M68HC11_NUM_REGS (8)
131 #define M68HC11_NUM_PSEUDO_REGS (M68HC11_MAX_SOFT_REGS+5)
132 #define M68HC11_ALL_REGS (M68HC11_NUM_REGS+M68HC11_NUM_PSEUDO_REGS)
134 #define M68HC11_REG_SIZE (2)
136 #define M68HC12_NUM_REGS (9)
137 #define M68HC12_NUM_PSEUDO_REGS ((M68HC11_MAX_SOFT_REGS+5)+1-1)
138 #define M68HC12_HARD_PC_REGNUM (SOFT_D32_REGNUM+1)
140 struct insn_sequence
;
143 /* Stack pointer correction value. For 68hc11, the stack pointer points
144 to the next push location. An offset of 1 must be applied to obtain
145 the address where the last value is saved. For 68hc12, the stack
146 pointer points to the last value pushed. No offset is necessary. */
147 int stack_correction
;
149 /* Description of instructions in the prologue. */
150 struct insn_sequence
*prologue
;
152 /* True if the page memory bank register is available
154 int use_page_register
;
156 /* ELF flags for ABI. */
160 #define M6811_TDEP gdbarch_tdep (current_gdbarch)
161 #define STACK_CORRECTION (M6811_TDEP->stack_correction)
162 #define USE_PAGE_REGISTER (M6811_TDEP->use_page_register)
164 struct m68hc11_unwind_cache
166 /* The previous frame's inner most stack address. Used as this
167 frame ID's stack_addr. */
169 /* The frame's base, optionally used by the high-level debug info. */
177 enum insn_return_kind return_kind
;
179 /* Table indicating the location of each and every register. */
180 struct trad_frame_saved_reg
*saved_regs
;
183 /* Table of registers for 68HC11. This includes the hard registers
184 and the soft registers used by GCC. */
186 m68hc11_register_names
[] =
188 "x", "d", "y", "sp", "pc", "a", "b",
189 "ccr", "page", "frame","tmp", "zs", "xy", 0,
190 "d1", "d2", "d3", "d4", "d5", "d6", "d7",
191 "d8", "d9", "d10", "d11", "d12", "d13", "d14",
192 "d15", "d16", "d17", "d18", "d19", "d20", "d21",
193 "d22", "d23", "d24", "d25", "d26", "d27", "d28",
194 "d29", "d30", "d31", "d32"
197 struct m68hc11_soft_reg
203 static struct m68hc11_soft_reg soft_regs
[M68HC11_ALL_REGS
];
205 #define M68HC11_FP_ADDR soft_regs[SOFT_FP_REGNUM].addr
207 static int soft_min_addr
;
208 static int soft_max_addr
;
209 static int soft_reg_initialized
= 0;
211 /* Look in the symbol table for the address of a pseudo register
212 in memory. If we don't find it, pretend the register is not used
213 and not available. */
215 m68hc11_get_register_info (struct m68hc11_soft_reg
*reg
, const char *name
)
217 struct minimal_symbol
*msymbol
;
219 msymbol
= lookup_minimal_symbol (name
, NULL
, NULL
);
222 reg
->addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
223 reg
->name
= xstrdup (name
);
225 /* Keep track of the address range for soft registers. */
226 if (reg
->addr
< (CORE_ADDR
) soft_min_addr
)
227 soft_min_addr
= reg
->addr
;
228 if (reg
->addr
> (CORE_ADDR
) soft_max_addr
)
229 soft_max_addr
= reg
->addr
;
238 /* Initialize the table of soft register addresses according
239 to the symbol table. */
241 m68hc11_initialize_register_info (void)
245 if (soft_reg_initialized
)
248 soft_min_addr
= INT_MAX
;
250 for (i
= 0; i
< M68HC11_ALL_REGS
; i
++)
252 soft_regs
[i
].name
= 0;
255 m68hc11_get_register_info (&soft_regs
[SOFT_FP_REGNUM
], "_.frame");
256 m68hc11_get_register_info (&soft_regs
[SOFT_TMP_REGNUM
], "_.tmp");
257 m68hc11_get_register_info (&soft_regs
[SOFT_ZS_REGNUM
], "_.z");
258 soft_regs
[SOFT_Z_REGNUM
] = soft_regs
[SOFT_ZS_REGNUM
];
259 m68hc11_get_register_info (&soft_regs
[SOFT_XY_REGNUM
], "_.xy");
261 for (i
= SOFT_D1_REGNUM
; i
< M68HC11_MAX_SOFT_REGS
; i
++)
265 sprintf (buf
, "_.d%d", i
- SOFT_D1_REGNUM
+ 1);
266 m68hc11_get_register_info (&soft_regs
[i
], buf
);
269 if (soft_regs
[SOFT_FP_REGNUM
].name
== 0)
271 warning ("No frame soft register found in the symbol table.\n");
272 warning ("Stack backtrace will not work.\n");
274 soft_reg_initialized
= 1;
277 /* Given an address in memory, return the soft register number if
278 that address corresponds to a soft register. Returns -1 if not. */
280 m68hc11_which_soft_register (CORE_ADDR addr
)
284 if (addr
< soft_min_addr
|| addr
> soft_max_addr
)
287 for (i
= SOFT_FP_REGNUM
; i
< M68HC11_ALL_REGS
; i
++)
289 if (soft_regs
[i
].name
&& soft_regs
[i
].addr
== addr
)
295 /* Fetch a pseudo register. The 68hc11 soft registers are treated like
296 pseudo registers. They are located in memory. Translate the register
297 fetch into a memory read. */
299 m68hc11_pseudo_register_read (struct gdbarch
*gdbarch
,
300 struct regcache
*regcache
,
301 int regno
, void *buf
)
303 /* The PC is a pseudo reg only for 68HC12 with the memory bank
305 if (regno
== M68HC12_HARD_PC_REGNUM
)
308 const int regsize
= TYPE_LENGTH (builtin_type_uint32
);
310 regcache_cooked_read_unsigned (regcache
, HARD_PC_REGNUM
, &pc
);
311 if (pc
>= 0x8000 && pc
< 0xc000)
315 regcache_cooked_read_unsigned (regcache
, HARD_PAGE_REGNUM
, &page
);
320 store_unsigned_integer (buf
, regsize
, pc
);
324 m68hc11_initialize_register_info ();
326 /* Fetch a soft register: translate into a memory read. */
327 if (soft_regs
[regno
].name
)
329 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 void *buf
)
344 /* The PC is a pseudo reg only for 68HC12 with the memory bank
346 if (regno
== M68HC12_HARD_PC_REGNUM
)
348 const int regsize
= TYPE_LENGTH (builtin_type_uint32
);
349 char *tmp
= alloca (regsize
);
352 memcpy (tmp
, buf
, regsize
);
353 pc
= extract_unsigned_integer (tmp
, regsize
);
357 regcache_cooked_write_unsigned (regcache
, HARD_PAGE_REGNUM
,
360 regcache_cooked_write_unsigned (regcache
, HARD_PC_REGNUM
,
364 regcache_cooked_write_unsigned (regcache
, HARD_PC_REGNUM
, pc
);
368 m68hc11_initialize_register_info ();
370 /* Store a soft register: translate into a memory write. */
371 if (soft_regs
[regno
].name
)
373 const int regsize
= 2;
374 char *tmp
= alloca (regsize
);
375 memcpy (tmp
, buf
, regsize
);
376 target_write_memory (soft_regs
[regno
].addr
, tmp
, regsize
);
381 m68hc11_register_name (int reg_nr
)
383 if (reg_nr
== M68HC12_HARD_PC_REGNUM
&& USE_PAGE_REGISTER
)
385 if (reg_nr
== HARD_PC_REGNUM
&& USE_PAGE_REGISTER
)
390 if (reg_nr
>= M68HC11_ALL_REGS
)
393 /* If we don't know the address of a soft register, pretend it
395 if (reg_nr
> M68HC11_LAST_HARD_REG
&& soft_regs
[reg_nr
].name
== 0)
397 return m68hc11_register_names
[reg_nr
];
400 static const unsigned char *
401 m68hc11_breakpoint_from_pc (CORE_ADDR
*pcptr
, int *lenptr
)
403 static unsigned char breakpoint
[] = {0x0};
405 *lenptr
= sizeof (breakpoint
);
410 /* 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 insn_sequence
*seq
, CORE_ADDR pc
,
516 unsigned char buffer
[MAX_CODES
];
523 for (; seq
->type
!= P_LAST
; seq
++)
526 for (j
= 0; j
< seq
->length
; j
++)
530 buffer
[bufsize
] = read_memory_unsigned_integer (pc
+ bufsize
,
534 /* Continue while we match the opcode. */
535 if (seq
->code
[j
] == buffer
[j
])
538 if ((seq
->code
[j
] & 0xf00) == 0)
541 /* Extract a sequence parameter (address or constant). */
542 switch (seq
->code
[j
])
545 cur_val
= (CORE_ADDR
) buffer
[j
];
549 cur_val
= cur_val
& 0x0ff;
550 cur_val
|= (buffer
[j
] << 8);
555 cur_val
|= buffer
[j
];
559 if ((buffer
[j
] & 0xE0) == 0x80)
561 v
= buffer
[j
] & 0x1f;
565 else if ((buffer
[j
] & 0xfe) == 0xf0)
567 v
= read_memory_unsigned_integer (pc
+ j
+ 1, 1);
571 else if (buffer
[j
] == 0xf2)
573 v
= read_memory_unsigned_integer (pc
+ j
+ 1, 2);
580 /* We have a full match. */
581 if (j
== seq
->length
)
590 /* Return the instruction that the function at the PC is using. */
591 static enum insn_return_kind
592 m68hc11_get_return_insn (CORE_ADDR pc
)
594 struct minimal_symbol
*sym
;
596 /* A flag indicating that this is a STO_M68HC12_FAR or STO_M68HC12_INTERRUPT
597 function is stored by elfread.c in the high bit of the info field.
598 Use this to decide which instruction the function uses to return. */
599 sym
= lookup_minimal_symbol_by_pc (pc
);
603 if (MSYMBOL_IS_RTC (sym
))
605 else if (MSYMBOL_IS_RTI (sym
))
611 /* Analyze the function prologue to find some information
613 - the PC of the first line (for m68hc11_skip_prologue)
614 - the offset of the previous frame saved address (from current frame)
615 - the soft registers which are pushed. */
617 m68hc11_scan_prologue (CORE_ADDR pc
, CORE_ADDR current_pc
,
618 struct m68hc11_unwind_cache
*info
)
623 int found_frame_point
;
626 struct insn_sequence
*seq_table
;
630 if (pc
>= current_pc
)
635 m68hc11_initialize_register_info ();
642 seq_table
= gdbarch_tdep (current_gdbarch
)->prologue
;
644 /* The 68hc11 stack is as follows:
660 +-----------+ <--- current frame
663 With most processors (like 68K) the previous frame can be computed
664 easily because it is always at a fixed offset (see link/unlink).
665 That is, locals are accessed with negative offsets, arguments are
666 accessed with positive ones. Since 68hc11 only supports offsets
667 in the range [0..255], the frame is defined at the bottom of
668 locals (see picture).
670 The purpose of the analysis made here is to find out the size
671 of locals in this function. An alternative to this is to use
672 DWARF2 info. This would be better but I don't know how to
673 access dwarf2 debug from this function.
675 Walk from the function entry point to the point where we save
676 the frame. While walking instructions, compute the size of bytes
677 which are pushed. This gives us the index to access the previous
680 We limit the search to 128 bytes so that the algorithm is bounded
681 in case of random and wrong code. We also stop and abort if
682 we find an instruction which is not supposed to appear in the
683 prologue (as generated by gcc 2.95, 2.96).
686 found_frame_point
= 0;
689 while (!done
&& pc
+ 2 < func_end
)
691 struct insn_sequence
*seq
;
694 seq
= m68hc11_analyze_instruction (seq_table
, pc
, &val
);
698 /* If we are within the instruction group, we can't advance the
699 pc nor the stack offset. Otherwise the caller's stack computed
700 from the current stack can be wrong. */
701 if (pc
+ seq
->length
> current_pc
)
704 pc
= pc
+ seq
->length
;
705 if (seq
->type
== P_SAVE_REG
)
707 if (found_frame_point
)
709 saved_reg
= m68hc11_which_soft_register (val
);
714 info
->saved_regs
[saved_reg
].addr
= save_addr
;
721 else if (seq
->type
== P_SET_FRAME
)
723 found_frame_point
= 1;
726 else if (seq
->type
== P_LOCAL_1
)
730 else if (seq
->type
== P_LOCAL_2
)
734 else if (seq
->type
== P_LOCAL_N
)
736 /* Stack pointer is decremented for the allocation. */
738 size
-= (int) (val
) | 0xffff0000;
743 if (found_frame_point
== 0)
744 info
->sp_offset
= size
;
746 info
->sp_offset
= -1;
751 m68hc11_skip_prologue (CORE_ADDR pc
)
753 CORE_ADDR func_addr
, func_end
;
754 struct symtab_and_line sal
;
755 struct m68hc11_unwind_cache tmp_cache
= { 0 };
757 /* If we have line debugging information, then the end of the
758 prologue should be the first assembly instruction of the
759 first source line. */
760 if (find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
762 sal
= find_pc_line (func_addr
, 0);
763 if (sal
.end
&& sal
.end
< func_end
)
767 pc
= m68hc11_scan_prologue (pc
, (CORE_ADDR
) -1, &tmp_cache
);
772 m68hc11_unwind_pc (struct gdbarch
*gdbarch
, struct frame_info
*next_frame
)
776 frame_unwind_unsigned_register (next_frame
, gdbarch_pc_regnum (gdbarch
),
781 /* Put here the code to store, into fi->saved_regs, the addresses of
782 the saved registers of frame described by FRAME_INFO. This
783 includes special registers such as pc and fp saved in special ways
784 in the stack frame. sp is even more special: the address we return
785 for it IS the sp for the next frame. */
787 struct m68hc11_unwind_cache
*
788 m68hc11_frame_unwind_cache (struct frame_info
*next_frame
,
789 void **this_prologue_cache
)
793 struct m68hc11_unwind_cache
*info
;
794 CORE_ADDR current_pc
;
797 if ((*this_prologue_cache
))
798 return (*this_prologue_cache
);
800 info
= FRAME_OBSTACK_ZALLOC (struct m68hc11_unwind_cache
);
801 (*this_prologue_cache
) = info
;
802 info
->saved_regs
= trad_frame_alloc_saved_regs (next_frame
);
804 info
->pc
= frame_func_unwind (next_frame
);
807 info
->return_kind
= m68hc11_get_return_insn (info
->pc
);
809 /* The SP was moved to the FP. This indicates that a new frame
810 was created. Get THIS frame's FP value by unwinding it from
812 frame_unwind_unsigned_register (next_frame
, SOFT_FP_REGNUM
, &this_base
);
819 current_pc
= frame_pc_unwind (next_frame
);
821 m68hc11_scan_prologue (info
->pc
, current_pc
, info
);
823 info
->saved_regs
[HARD_PC_REGNUM
].addr
= info
->size
;
825 if (info
->sp_offset
!= (CORE_ADDR
) -1)
827 info
->saved_regs
[HARD_PC_REGNUM
].addr
= info
->sp_offset
;
828 frame_unwind_unsigned_register (next_frame
, HARD_SP_REGNUM
, &this_base
);
829 prev_sp
= this_base
+ info
->sp_offset
+ 2;
830 this_base
+= STACK_CORRECTION
;
834 /* The FP points at the last saved register. Adjust the FP back
835 to before the first saved register giving the SP. */
836 prev_sp
= this_base
+ info
->size
+ 2;
838 this_base
+= STACK_CORRECTION
;
839 if (soft_regs
[SOFT_FP_REGNUM
].name
)
840 info
->saved_regs
[SOFT_FP_REGNUM
].addr
= info
->size
- 2;
843 if (info
->return_kind
== RETURN_RTC
)
846 info
->saved_regs
[HARD_PAGE_REGNUM
].addr
= info
->size
;
847 info
->saved_regs
[HARD_PC_REGNUM
].addr
= info
->size
+ 1;
849 else if (info
->return_kind
== RETURN_RTI
)
852 info
->saved_regs
[HARD_CCR_REGNUM
].addr
= info
->size
;
853 info
->saved_regs
[HARD_D_REGNUM
].addr
= info
->size
+ 1;
854 info
->saved_regs
[HARD_X_REGNUM
].addr
= info
->size
+ 3;
855 info
->saved_regs
[HARD_Y_REGNUM
].addr
= info
->size
+ 5;
856 info
->saved_regs
[HARD_PC_REGNUM
].addr
= info
->size
+ 7;
859 /* Add 1 here to adjust for the post-decrement nature of the push
861 info
->prev_sp
= prev_sp
;
863 info
->base
= this_base
;
865 /* Adjust all the saved registers so that they contain addresses and not
867 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
- 1; i
++)
868 if (trad_frame_addr_p (info
->saved_regs
, i
))
870 info
->saved_regs
[i
].addr
+= this_base
;
873 /* The previous frame's SP needed to be computed. Save the computed
875 trad_frame_set_value (info
->saved_regs
, HARD_SP_REGNUM
, info
->prev_sp
);
880 /* Given a GDB frame, determine the address of the calling function's
881 frame. This will be used to create a new GDB frame struct. */
884 m68hc11_frame_this_id (struct frame_info
*next_frame
,
885 void **this_prologue_cache
,
886 struct frame_id
*this_id
)
888 struct m68hc11_unwind_cache
*info
889 = m68hc11_frame_unwind_cache (next_frame
, this_prologue_cache
);
894 /* The FUNC is easy. */
895 func
= frame_func_unwind (next_frame
);
897 /* Hopefully the prologue analysis either correctly determined the
898 frame's base (which is the SP from the previous frame), or set
899 that base to "NULL". */
900 base
= info
->prev_sp
;
904 id
= frame_id_build (base
, func
);
906 /* Check that we're not going round in circles with the same frame
907 ID (but avoid applying the test to sentinel frames which do go
908 round in circles). Can't use frame_id_eq() as that doesn't yet
909 compare the frame's PC value. */
910 if (frame_relative_level (next_frame
) >= 0
911 && get_frame_type (next_frame
) != DUMMY_FRAME
912 && frame_id_eq (get_frame_id (next_frame
), id
))
919 m68hc11_frame_prev_register (struct frame_info
*next_frame
,
920 void **this_prologue_cache
,
921 int regnum
, int *optimizedp
,
922 enum lval_type
*lvalp
, CORE_ADDR
*addrp
,
923 int *realnump
, void *bufferp
)
925 struct m68hc11_unwind_cache
*info
926 = m68hc11_frame_unwind_cache (next_frame
, this_prologue_cache
);
928 trad_frame_prev_register (next_frame
, info
->saved_regs
, regnum
,
929 optimizedp
, lvalp
, addrp
, realnump
, bufferp
);
931 if (regnum
== HARD_PC_REGNUM
)
933 /* Take into account the 68HC12 specific call (PC + page). */
934 if (info
->return_kind
== RETURN_RTC
935 && *addrp
>= 0x08000 && *addrp
< 0x0c000
936 && USE_PAGE_REGISTER
)
942 trad_frame_prev_register (next_frame
, info
->saved_regs
,
943 HARD_PAGE_REGNUM
, &page_optimized
,
946 *addrp
+= ((page
& 0x0ff) << 14);
952 static const struct frame_unwind m68hc11_frame_unwind
= {
954 m68hc11_frame_this_id
,
955 m68hc11_frame_prev_register
958 const struct frame_unwind
*
959 m68hc11_frame_sniffer (struct frame_info
*next_frame
)
961 return &m68hc11_frame_unwind
;
965 m68hc11_frame_base_address (struct frame_info
*next_frame
, void **this_cache
)
967 struct m68hc11_unwind_cache
*info
968 = m68hc11_frame_unwind_cache (next_frame
, this_cache
);
974 m68hc11_frame_args_address (struct frame_info
*next_frame
, void **this_cache
)
977 struct m68hc11_unwind_cache
*info
978 = m68hc11_frame_unwind_cache (next_frame
, this_cache
);
980 addr
= info
->base
+ info
->size
;
981 if (info
->return_kind
== RETURN_RTC
)
983 else if (info
->return_kind
== RETURN_RTI
)
989 static const struct frame_base m68hc11_frame_base
= {
990 &m68hc11_frame_unwind
,
991 m68hc11_frame_base_address
,
992 m68hc11_frame_base_address
,
993 m68hc11_frame_args_address
997 m68hc11_unwind_sp (struct gdbarch
*gdbarch
, struct frame_info
*next_frame
)
1000 frame_unwind_unsigned_register (next_frame
, HARD_SP_REGNUM
, &sp
);
1004 /* Assuming NEXT_FRAME->prev is a dummy, return the frame ID of that
1005 dummy frame. The frame ID's base needs to match the TOS value
1006 saved by save_dummy_frame_tos(), and the PC match the dummy frame's
1009 static struct frame_id
1010 m68hc11_unwind_dummy_id (struct gdbarch
*gdbarch
, struct frame_info
*next_frame
)
1013 CORE_ADDR pc
= frame_pc_unwind (next_frame
);
1015 frame_unwind_unsigned_register (next_frame
, SOFT_FP_REGNUM
, &tos
);
1017 return frame_id_build (tos
, pc
);
1021 /* Get and print the register from the given frame. */
1023 m68hc11_print_register (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1024 struct frame_info
*frame
, int regno
)
1028 if (regno
== HARD_PC_REGNUM
|| regno
== HARD_SP_REGNUM
1029 || regno
== SOFT_FP_REGNUM
|| regno
== M68HC12_HARD_PC_REGNUM
)
1030 rval
= get_frame_register_unsigned (frame
, regno
);
1032 rval
= get_frame_register_signed (frame
, regno
);
1034 if (regno
== HARD_A_REGNUM
|| regno
== HARD_B_REGNUM
1035 || regno
== HARD_CCR_REGNUM
|| regno
== HARD_PAGE_REGNUM
)
1037 fprintf_filtered (file
, "0x%02x ", (unsigned char) rval
);
1038 if (regno
!= HARD_CCR_REGNUM
)
1039 print_longest (file
, 'd', 1, rval
);
1043 if (regno
== HARD_PC_REGNUM
&& gdbarch_tdep (gdbarch
)->use_page_register
)
1047 page
= get_frame_register_unsigned (frame
, HARD_PAGE_REGNUM
);
1048 fprintf_filtered (file
, "0x%02x:%04x ", (unsigned) page
,
1053 fprintf_filtered (file
, "0x%04x ", (unsigned) rval
);
1054 if (regno
!= HARD_PC_REGNUM
&& regno
!= HARD_SP_REGNUM
1055 && regno
!= SOFT_FP_REGNUM
&& regno
!= M68HC12_HARD_PC_REGNUM
)
1056 print_longest (file
, 'd', 1, rval
);
1060 if (regno
== HARD_CCR_REGNUM
)
1064 unsigned char l
= rval
& 0xff;
1066 fprintf_filtered (file
, "%c%c%c%c%c%c%c%c ",
1067 l
& M6811_S_BIT
? 'S' : '-',
1068 l
& M6811_X_BIT
? 'X' : '-',
1069 l
& M6811_H_BIT
? 'H' : '-',
1070 l
& M6811_I_BIT
? 'I' : '-',
1071 l
& M6811_N_BIT
? 'N' : '-',
1072 l
& M6811_Z_BIT
? 'Z' : '-',
1073 l
& M6811_V_BIT
? 'V' : '-',
1074 l
& M6811_C_BIT
? 'C' : '-');
1075 N
= (l
& M6811_N_BIT
) != 0;
1076 Z
= (l
& M6811_Z_BIT
) != 0;
1077 V
= (l
& M6811_V_BIT
) != 0;
1078 C
= (l
& M6811_C_BIT
) != 0;
1080 /* Print flags following the h8300 */
1082 fprintf_filtered (file
, "u> ");
1083 else if ((C
| Z
) == 1)
1084 fprintf_filtered (file
, "u<= ");
1086 fprintf_filtered (file
, "u< ");
1089 fprintf_filtered (file
, "!= ");
1091 fprintf_filtered (file
, "== ");
1094 fprintf_filtered (file
, ">= ");
1096 fprintf_filtered (file
, "< ");
1098 if ((Z
| (N
^ V
)) == 0)
1099 fprintf_filtered (file
, "> ");
1101 fprintf_filtered (file
, "<= ");
1105 /* Same as 'info reg' but prints the registers in a different way. */
1107 m68hc11_print_registers_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1108 struct frame_info
*frame
, int regno
, int cpregs
)
1112 const char *name
= gdbarch_register_name (gdbarch
, regno
);
1114 if (!name
|| !*name
)
1117 fprintf_filtered (file
, "%-10s ", name
);
1118 m68hc11_print_register (gdbarch
, file
, frame
, regno
);
1119 fprintf_filtered (file
, "\n");
1125 fprintf_filtered (file
, "PC=");
1126 m68hc11_print_register (gdbarch
, file
, frame
, HARD_PC_REGNUM
);
1128 fprintf_filtered (file
, " SP=");
1129 m68hc11_print_register (gdbarch
, file
, frame
, HARD_SP_REGNUM
);
1131 fprintf_filtered (file
, " FP=");
1132 m68hc11_print_register (gdbarch
, file
, frame
, SOFT_FP_REGNUM
);
1134 fprintf_filtered (file
, "\nCCR=");
1135 m68hc11_print_register (gdbarch
, file
, frame
, HARD_CCR_REGNUM
);
1137 fprintf_filtered (file
, "\nD=");
1138 m68hc11_print_register (gdbarch
, file
, frame
, HARD_D_REGNUM
);
1140 fprintf_filtered (file
, " X=");
1141 m68hc11_print_register (gdbarch
, file
, frame
, HARD_X_REGNUM
);
1143 fprintf_filtered (file
, " Y=");
1144 m68hc11_print_register (gdbarch
, file
, frame
, HARD_Y_REGNUM
);
1146 if (gdbarch_tdep (gdbarch
)->use_page_register
)
1148 fprintf_filtered (file
, "\nPage=");
1149 m68hc11_print_register (gdbarch
, file
, frame
, HARD_PAGE_REGNUM
);
1151 fprintf_filtered (file
, "\n");
1154 for (i
= SOFT_D1_REGNUM
; i
< M68HC11_ALL_REGS
; i
++)
1156 /* Skip registers which are not defined in the symbol table. */
1157 if (soft_regs
[i
].name
== 0)
1160 fprintf_filtered (file
, "D%d=", i
- SOFT_D1_REGNUM
+ 1);
1161 m68hc11_print_register (gdbarch
, file
, frame
, i
);
1164 fprintf_filtered (file
, "\n");
1166 fprintf_filtered (file
, " ");
1168 if (nr
&& (nr
% 8) != 7)
1169 fprintf_filtered (file
, "\n");
1173 /* Same as 'info reg' but prints the registers in a different way. */
1175 show_regs (char *args
, int from_tty
)
1177 m68hc11_print_registers_info (current_gdbarch
, gdb_stdout
,
1178 get_current_frame (), -1, 1);
1182 m68hc11_stack_align (CORE_ADDR addr
)
1184 return ((addr
+ 1) & -2);
1188 m68hc11_push_dummy_call (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
,
1189 struct regcache
*regcache
, CORE_ADDR bp_addr
,
1190 int nargs
, struct value
**args
, CORE_ADDR sp
,
1191 int struct_return
, CORE_ADDR struct_addr
)
1194 int first_stack_argnum
;
1200 first_stack_argnum
= 0;
1203 /* The struct is allocated on the stack and gdb used the stack
1204 pointer for the address of that struct. We must apply the
1205 stack offset on the address. */
1206 regcache_cooked_write_unsigned (regcache
, HARD_D_REGNUM
,
1207 struct_addr
+ STACK_CORRECTION
);
1211 type
= VALUE_TYPE (args
[0]);
1212 len
= TYPE_LENGTH (type
);
1214 /* First argument is passed in D and X registers. */
1219 v
= extract_unsigned_integer (VALUE_CONTENTS (args
[0]), len
);
1220 first_stack_argnum
= 1;
1222 regcache_cooked_write_unsigned (regcache
, HARD_D_REGNUM
, v
);
1226 regcache_cooked_write_unsigned (regcache
, HARD_X_REGNUM
, v
);
1231 for (argnum
= nargs
- 1; argnum
>= first_stack_argnum
; argnum
--)
1233 type
= VALUE_TYPE (args
[argnum
]);
1234 len
= TYPE_LENGTH (type
);
1238 static char zero
= 0;
1241 write_memory (sp
, &zero
, 1);
1243 val
= (char*) VALUE_CONTENTS (args
[argnum
]);
1245 write_memory (sp
, val
, len
);
1248 /* Store return address. */
1250 store_unsigned_integer (buf
, 2, bp_addr
);
1251 write_memory (sp
, buf
, 2);
1253 /* Finally, update the stack pointer... */
1254 sp
-= STACK_CORRECTION
;
1255 regcache_cooked_write_unsigned (regcache
, HARD_SP_REGNUM
, sp
);
1257 /* ...and fake a frame pointer. */
1258 regcache_cooked_write_unsigned (regcache
, SOFT_FP_REGNUM
, sp
);
1260 /* DWARF2/GCC uses the stack address *before* the function call as a
1266 /* Return the GDB type object for the "standard" data type
1267 of data in register N. */
1269 static struct type
*
1270 m68hc11_register_type (struct gdbarch
*gdbarch
, int reg_nr
)
1274 case HARD_PAGE_REGNUM
:
1277 case HARD_CCR_REGNUM
:
1278 return builtin_type_uint8
;
1280 case M68HC12_HARD_PC_REGNUM
:
1281 return builtin_type_uint32
;
1284 return builtin_type_uint16
;
1289 m68hc11_store_return_value (struct type
*type
, struct regcache
*regcache
,
1294 len
= TYPE_LENGTH (type
);
1296 /* First argument is passed in D and X registers. */
1298 regcache_raw_write_part (regcache
, HARD_D_REGNUM
, 2 - len
, len
, valbuf
);
1301 regcache_raw_write_part (regcache
, HARD_X_REGNUM
, 4 - len
,
1303 regcache_raw_write (regcache
, HARD_D_REGNUM
, (char*) valbuf
+ (len
- 2));
1306 error ("return of value > 4 is not supported.");
1310 /* Given a return value in `regcache' with a type `type',
1311 extract and copy its value into `valbuf'. */
1314 m68hc11_extract_return_value (struct type
*type
, struct regcache
*regcache
,
1317 int len
= TYPE_LENGTH (type
);
1318 char buf
[M68HC11_REG_SIZE
];
1320 regcache_raw_read (regcache
, HARD_D_REGNUM
, buf
);
1324 memcpy (valbuf
, buf
+ 1, 1);
1328 memcpy (valbuf
, buf
, 2);
1332 memcpy ((char*) valbuf
+ 1, buf
, 2);
1333 regcache_raw_read (regcache
, HARD_X_REGNUM
, buf
);
1334 memcpy (valbuf
, buf
+ 1, 1);
1338 memcpy ((char*) valbuf
+ 2, buf
, 2);
1339 regcache_raw_read (regcache
, HARD_X_REGNUM
, buf
);
1340 memcpy (valbuf
, buf
, 2);
1344 error ("bad size for return value");
1348 /* Should call_function allocate stack space for a struct return? */
1350 m68hc11_use_struct_convention (int gcc_p
, struct type
*type
)
1352 return (TYPE_CODE (type
) == TYPE_CODE_STRUCT
1353 || TYPE_CODE (type
) == TYPE_CODE_UNION
1354 || TYPE_LENGTH (type
) > 4);
1358 m68hc11_return_value_on_stack (struct type
*type
)
1360 return TYPE_LENGTH (type
) > 4;
1363 /* Extract from an array REGBUF containing the (raw) register state
1364 the address in which a function should return its structure value,
1365 as a CORE_ADDR (or an expression that can be used as one). */
1367 m68hc11_extract_struct_value_address (struct regcache
*regcache
)
1369 char buf
[M68HC11_REG_SIZE
];
1371 regcache_cooked_read (regcache
, HARD_D_REGNUM
, buf
);
1372 return extract_unsigned_integer (buf
, M68HC11_REG_SIZE
);
1375 /* Test whether the ELF symbol corresponds to a function using rtc or
1379 m68hc11_elf_make_msymbol_special (asymbol
*sym
, struct minimal_symbol
*msym
)
1381 unsigned char flags
;
1383 flags
= ((elf_symbol_type
*)sym
)->internal_elf_sym
.st_other
;
1384 if (flags
& STO_M68HC12_FAR
)
1385 MSYMBOL_SET_RTC (msym
);
1386 if (flags
& STO_M68HC12_INTERRUPT
)
1387 MSYMBOL_SET_RTI (msym
);
1391 gdb_print_insn_m68hc11 (bfd_vma memaddr
, disassemble_info
*info
)
1393 if (TARGET_ARCHITECTURE
->arch
== bfd_arch_m68hc11
)
1394 return print_insn_m68hc11 (memaddr
, info
);
1396 return print_insn_m68hc12 (memaddr
, info
);
1401 /* 68HC11/68HC12 register groups.
1402 Identify real hard registers and soft registers used by gcc. */
1404 static struct reggroup
*m68hc11_soft_reggroup
;
1405 static struct reggroup
*m68hc11_hard_reggroup
;
1408 m68hc11_init_reggroups (void)
1410 m68hc11_hard_reggroup
= reggroup_new ("hard", USER_REGGROUP
);
1411 m68hc11_soft_reggroup
= reggroup_new ("soft", USER_REGGROUP
);
1415 m68hc11_add_reggroups (struct gdbarch
*gdbarch
)
1417 reggroup_add (gdbarch
, m68hc11_hard_reggroup
);
1418 reggroup_add (gdbarch
, m68hc11_soft_reggroup
);
1419 reggroup_add (gdbarch
, general_reggroup
);
1420 reggroup_add (gdbarch
, float_reggroup
);
1421 reggroup_add (gdbarch
, all_reggroup
);
1422 reggroup_add (gdbarch
, save_reggroup
);
1423 reggroup_add (gdbarch
, restore_reggroup
);
1424 reggroup_add (gdbarch
, vector_reggroup
);
1425 reggroup_add (gdbarch
, system_reggroup
);
1429 m68hc11_register_reggroup_p (struct gdbarch
*gdbarch
, int regnum
,
1430 struct reggroup
*group
)
1432 /* We must save the real hard register as well as gcc
1433 soft registers including the frame pointer. */
1434 if (group
== save_reggroup
|| group
== restore_reggroup
)
1436 return (regnum
<= gdbarch_num_regs (gdbarch
)
1437 || ((regnum
== SOFT_FP_REGNUM
1438 || regnum
== SOFT_TMP_REGNUM
1439 || regnum
== SOFT_ZS_REGNUM
1440 || regnum
== SOFT_XY_REGNUM
)
1441 && m68hc11_register_name (regnum
)));
1444 /* Group to identify gcc soft registers (d1..dN). */
1445 if (group
== m68hc11_soft_reggroup
)
1447 return regnum
>= SOFT_D1_REGNUM
&& m68hc11_register_name (regnum
);
1450 if (group
== m68hc11_hard_reggroup
)
1452 return regnum
== HARD_PC_REGNUM
|| regnum
== HARD_SP_REGNUM
1453 || regnum
== HARD_X_REGNUM
|| regnum
== HARD_D_REGNUM
1454 || regnum
== HARD_Y_REGNUM
|| regnum
== HARD_CCR_REGNUM
;
1456 return default_register_reggroup_p (gdbarch
, regnum
, group
);
1459 static struct gdbarch
*
1460 m68hc11_gdbarch_init (struct gdbarch_info info
,
1461 struct gdbarch_list
*arches
)
1463 struct gdbarch
*gdbarch
;
1464 struct gdbarch_tdep
*tdep
;
1467 soft_reg_initialized
= 0;
1469 /* Extract the elf_flags if available. */
1470 if (info
.abfd
!= NULL
1471 && bfd_get_flavour (info
.abfd
) == bfd_target_elf_flavour
)
1472 elf_flags
= elf_elfheader (info
.abfd
)->e_flags
;
1476 /* try to find a pre-existing architecture */
1477 for (arches
= gdbarch_list_lookup_by_info (arches
, &info
);
1479 arches
= gdbarch_list_lookup_by_info (arches
->next
, &info
))
1481 if (gdbarch_tdep (arches
->gdbarch
)->elf_flags
!= elf_flags
)
1484 return arches
->gdbarch
;
1487 /* Need a new architecture. Fill in a target specific vector. */
1488 tdep
= (struct gdbarch_tdep
*) xmalloc (sizeof (struct gdbarch_tdep
));
1489 gdbarch
= gdbarch_alloc (&info
, tdep
);
1490 tdep
->elf_flags
= elf_flags
;
1492 switch (info
.bfd_arch_info
->arch
)
1494 case bfd_arch_m68hc11
:
1495 tdep
->stack_correction
= 1;
1496 tdep
->use_page_register
= 0;
1497 tdep
->prologue
= m6811_prologue
;
1498 set_gdbarch_addr_bit (gdbarch
, 16);
1499 set_gdbarch_num_pseudo_regs (gdbarch
, M68HC11_NUM_PSEUDO_REGS
);
1500 set_gdbarch_pc_regnum (gdbarch
, HARD_PC_REGNUM
);
1501 set_gdbarch_num_regs (gdbarch
, M68HC11_NUM_REGS
);
1504 case bfd_arch_m68hc12
:
1505 tdep
->stack_correction
= 0;
1506 tdep
->use_page_register
= elf_flags
& E_M68HC12_BANKS
;
1507 tdep
->prologue
= m6812_prologue
;
1508 set_gdbarch_addr_bit (gdbarch
, elf_flags
& E_M68HC12_BANKS
? 32 : 16);
1509 set_gdbarch_num_pseudo_regs (gdbarch
,
1510 elf_flags
& E_M68HC12_BANKS
1511 ? M68HC12_NUM_PSEUDO_REGS
1512 : M68HC11_NUM_PSEUDO_REGS
);
1513 set_gdbarch_pc_regnum (gdbarch
, elf_flags
& E_M68HC12_BANKS
1514 ? M68HC12_HARD_PC_REGNUM
: HARD_PC_REGNUM
);
1515 set_gdbarch_num_regs (gdbarch
, elf_flags
& E_M68HC12_BANKS
1516 ? M68HC12_NUM_REGS
: M68HC11_NUM_REGS
);
1523 /* Initially set everything according to the ABI.
1524 Use 16-bit integers since it will be the case for most
1525 programs. The size of these types should normally be set
1526 according to the dwarf2 debug information. */
1527 set_gdbarch_short_bit (gdbarch
, 16);
1528 set_gdbarch_int_bit (gdbarch
, elf_flags
& E_M68HC11_I32
? 32 : 16);
1529 set_gdbarch_float_bit (gdbarch
, 32);
1530 set_gdbarch_double_bit (gdbarch
, elf_flags
& E_M68HC11_F64
? 64 : 32);
1531 set_gdbarch_long_double_bit (gdbarch
, 64);
1532 set_gdbarch_long_bit (gdbarch
, 32);
1533 set_gdbarch_ptr_bit (gdbarch
, 16);
1534 set_gdbarch_long_long_bit (gdbarch
, 64);
1536 /* Characters are unsigned. */
1537 set_gdbarch_char_signed (gdbarch
, 0);
1539 set_gdbarch_unwind_pc (gdbarch
, m68hc11_unwind_pc
);
1540 set_gdbarch_unwind_sp (gdbarch
, m68hc11_unwind_sp
);
1542 /* Set register info. */
1543 set_gdbarch_fp0_regnum (gdbarch
, -1);
1544 set_gdbarch_frame_args_skip (gdbarch
, 0);
1546 set_gdbarch_write_pc (gdbarch
, generic_target_write_pc
);
1548 set_gdbarch_sp_regnum (gdbarch
, HARD_SP_REGNUM
);
1549 set_gdbarch_register_name (gdbarch
, m68hc11_register_name
);
1550 set_gdbarch_register_type (gdbarch
, m68hc11_register_type
);
1551 set_gdbarch_pseudo_register_read (gdbarch
, m68hc11_pseudo_register_read
);
1552 set_gdbarch_pseudo_register_write (gdbarch
, m68hc11_pseudo_register_write
);
1554 set_gdbarch_push_dummy_call (gdbarch
, m68hc11_push_dummy_call
);
1556 set_gdbarch_extract_return_value (gdbarch
, m68hc11_extract_return_value
);
1557 set_gdbarch_return_value_on_stack (gdbarch
, m68hc11_return_value_on_stack
);
1559 set_gdbarch_store_return_value (gdbarch
, m68hc11_store_return_value
);
1560 set_gdbarch_extract_struct_value_address (gdbarch
, m68hc11_extract_struct_value_address
);
1562 set_gdbarch_store_return_value (gdbarch
, m68hc11_store_return_value
);
1563 set_gdbarch_extract_struct_value_address (gdbarch
, m68hc11_extract_struct_value_address
);
1564 set_gdbarch_use_struct_convention (gdbarch
, m68hc11_use_struct_convention
);
1565 set_gdbarch_skip_prologue (gdbarch
, m68hc11_skip_prologue
);
1566 set_gdbarch_inner_than (gdbarch
, core_addr_lessthan
);
1567 set_gdbarch_decr_pc_after_break (gdbarch
, 0);
1568 set_gdbarch_function_start_offset (gdbarch
, 0);
1569 set_gdbarch_breakpoint_from_pc (gdbarch
, m68hc11_breakpoint_from_pc
);
1570 set_gdbarch_deprecated_stack_align (gdbarch
, m68hc11_stack_align
);
1571 set_gdbarch_print_insn (gdbarch
, gdb_print_insn_m68hc11
);
1573 m68hc11_add_reggroups (gdbarch
);
1574 set_gdbarch_register_reggroup_p (gdbarch
, m68hc11_register_reggroup_p
);
1575 set_gdbarch_print_registers_info (gdbarch
, m68hc11_print_registers_info
);
1577 /* Hook in the DWARF CFI frame unwinder. */
1578 frame_unwind_append_sniffer (gdbarch
, dwarf2_frame_sniffer
);
1580 frame_unwind_append_sniffer (gdbarch
, m68hc11_frame_sniffer
);
1581 frame_base_set_default (gdbarch
, &m68hc11_frame_base
);
1583 /* Methods for saving / extracting a dummy frame's ID. The ID's
1584 stack address must match the SP value returned by
1585 PUSH_DUMMY_CALL, and saved by generic_save_dummy_frame_tos. */
1586 set_gdbarch_unwind_dummy_id (gdbarch
, m68hc11_unwind_dummy_id
);
1588 /* Return the unwound PC value. */
1589 set_gdbarch_unwind_pc (gdbarch
, m68hc11_unwind_pc
);
1591 /* Minsymbol frobbing. */
1592 set_gdbarch_elf_make_msymbol_special (gdbarch
,
1593 m68hc11_elf_make_msymbol_special
);
1595 set_gdbarch_believe_pcc_promotion (gdbarch
, 1);
1600 extern initialize_file_ftype _initialize_m68hc11_tdep
; /* -Wmissing-prototypes */
1603 _initialize_m68hc11_tdep (void)
1605 register_gdbarch_init (bfd_arch_m68hc11
, m68hc11_gdbarch_init
);
1606 register_gdbarch_init (bfd_arch_m68hc12
, m68hc11_gdbarch_init
);
1607 m68hc11_init_reggroups ();
1609 deprecate_cmd (add_com ("regs", class_vars
, show_regs
,
1610 "Print all registers"),