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- /* Target-dependent code for Motorola 68HC11 & 68HC12
- Copyright (C) 1999-2022 Free Software Foundation, Inc.
- Contributed by Stephane Carrez, stcarrez@nerim.fr
- This file is part of GDB.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- #include "defs.h"
- #include "frame.h"
- #include "frame-unwind.h"
- #include "frame-base.h"
- #include "dwarf2/frame.h"
- #include "trad-frame.h"
- #include "symtab.h"
- #include "gdbtypes.h"
- #include "gdbcmd.h"
- #include "gdbcore.h"
- #include "value.h"
- #include "inferior.h"
- #include "dis-asm.h"
- #include "symfile.h"
- #include "objfiles.h"
- #include "arch-utils.h"
- #include "regcache.h"
- #include "reggroups.h"
- #include "gdbarch.h"
- #include "target.h"
- #include "opcode/m68hc11.h"
- #include "elf/m68hc11.h"
- #include "elf-bfd.h"
- /* Macros for setting and testing a bit in a minimal symbol.
- For 68HC11/68HC12 we have two flags that tell which return
- type the function is using. This is used for prologue and frame
- analysis to compute correct stack frame layout.
-
- The MSB of the minimal symbol's "info" field is used for this purpose.
- MSYMBOL_SET_RTC Actually sets the "RTC" bit.
- MSYMBOL_SET_RTI Actually sets the "RTI" bit.
- MSYMBOL_IS_RTC Tests the "RTC" bit in a minimal symbol.
- MSYMBOL_IS_RTI Tests the "RTC" bit in a minimal symbol. */
- #define MSYMBOL_SET_RTC(msym) \
- MSYMBOL_TARGET_FLAG_1 (msym) = 1
- #define MSYMBOL_SET_RTI(msym) \
- MSYMBOL_TARGET_FLAG_2 (msym) = 1
- #define MSYMBOL_IS_RTC(msym) \
- MSYMBOL_TARGET_FLAG_1 (msym)
- #define MSYMBOL_IS_RTI(msym) \
- MSYMBOL_TARGET_FLAG_2 (msym)
- enum insn_return_kind {
- RETURN_RTS,
- RETURN_RTC,
- RETURN_RTI
- };
-
- /* Register numbers of various important registers. */
- #define HARD_X_REGNUM 0
- #define HARD_D_REGNUM 1
- #define HARD_Y_REGNUM 2
- #define HARD_SP_REGNUM 3
- #define HARD_PC_REGNUM 4
- #define HARD_A_REGNUM 5
- #define HARD_B_REGNUM 6
- #define HARD_CCR_REGNUM 7
- /* 68HC12 page number register.
- Note: to keep a compatibility with gcc register naming, we must
- not have to rename FP and other soft registers. The page register
- is a real hard register and must therefore be counted by gdbarch_num_regs.
- For this it has the same number as Z register (which is not used). */
- #define HARD_PAGE_REGNUM 8
- #define M68HC11_LAST_HARD_REG (HARD_PAGE_REGNUM)
- /* Z is replaced by X or Y by gcc during machine reorg.
- ??? There is no way to get it and even know whether
- it's in X or Y or in ZS. */
- #define SOFT_Z_REGNUM 8
- /* Soft registers. These registers are special. There are treated
- like normal hard registers by gcc and gdb (ie, within dwarf2 info).
- They are physically located in memory. */
- #define SOFT_FP_REGNUM 9
- #define SOFT_TMP_REGNUM 10
- #define SOFT_ZS_REGNUM 11
- #define SOFT_XY_REGNUM 12
- #define SOFT_UNUSED_REGNUM 13
- #define SOFT_D1_REGNUM 14
- #define SOFT_D32_REGNUM (SOFT_D1_REGNUM+31)
- #define M68HC11_MAX_SOFT_REGS 32
- #define M68HC11_NUM_REGS (M68HC11_LAST_HARD_REG + 1)
- #define M68HC11_NUM_PSEUDO_REGS (M68HC11_MAX_SOFT_REGS+5)
- #define M68HC11_ALL_REGS (M68HC11_NUM_REGS+M68HC11_NUM_PSEUDO_REGS)
- #define M68HC11_REG_SIZE (2)
- #define M68HC12_NUM_REGS (9)
- #define M68HC12_NUM_PSEUDO_REGS ((M68HC11_MAX_SOFT_REGS+5)+1-1)
- #define M68HC12_HARD_PC_REGNUM (SOFT_D32_REGNUM+1)
- struct insn_sequence;
- struct m68gc11_gdbarch_tdep : gdbarch_tdep
- {
- /* Stack pointer correction value. For 68hc11, the stack pointer points
- to the next push location. An offset of 1 must be applied to obtain
- the address where the last value is saved. For 68hc12, the stack
- pointer points to the last value pushed. No offset is necessary. */
- int stack_correction = 0;
- /* Description of instructions in the prologue. */
- struct insn_sequence *prologue = nullptr;
- /* True if the page memory bank register is available
- and must be used. */
- int use_page_register = 0;
- /* ELF flags for ABI. */
- int elf_flags = 0;
- };
- static int
- stack_correction (gdbarch *arch)
- {
- m68gc11_gdbarch_tdep *tdep = (m68gc11_gdbarch_tdep *) gdbarch_tdep (arch);
- return tdep->stack_correction;
- }
- static int
- use_page_register (gdbarch *arch)
- {
- m68gc11_gdbarch_tdep *tdep = (m68gc11_gdbarch_tdep *) gdbarch_tdep (arch);
- return tdep->stack_correction;
- }
- struct m68hc11_unwind_cache
- {
- /* The previous frame's inner most stack address. Used as this
- frame ID's stack_addr. */
- CORE_ADDR prev_sp;
- /* The frame's base, optionally used by the high-level debug info. */
- CORE_ADDR base;
- CORE_ADDR pc;
- int size;
- int prologue_type;
- CORE_ADDR return_pc;
- CORE_ADDR sp_offset;
- int frameless;
- enum insn_return_kind return_kind;
- /* Table indicating the location of each and every register. */
- trad_frame_saved_reg *saved_regs;
- };
- /* Table of registers for 68HC11. This includes the hard registers
- and the soft registers used by GCC. */
- static const char *
- m68hc11_register_names[] =
- {
- "x", "d", "y", "sp", "pc", "a", "b",
- "ccr", "page", "frame","tmp", "zs", "xy", 0,
- "d1", "d2", "d3", "d4", "d5", "d6", "d7",
- "d8", "d9", "d10", "d11", "d12", "d13", "d14",
- "d15", "d16", "d17", "d18", "d19", "d20", "d21",
- "d22", "d23", "d24", "d25", "d26", "d27", "d28",
- "d29", "d30", "d31", "d32"
- };
- struct m68hc11_soft_reg
- {
- const char *name;
- CORE_ADDR addr;
- };
- static struct m68hc11_soft_reg soft_regs[M68HC11_ALL_REGS];
- #define M68HC11_FP_ADDR soft_regs[SOFT_FP_REGNUM].addr
- static int soft_min_addr;
- static int soft_max_addr;
- static int soft_reg_initialized = 0;
- /* Look in the symbol table for the address of a pseudo register
- in memory. If we don't find it, pretend the register is not used
- and not available. */
- static void
- m68hc11_get_register_info (struct m68hc11_soft_reg *reg, const char *name)
- {
- struct bound_minimal_symbol msymbol;
- msymbol = lookup_minimal_symbol (name, NULL, NULL);
- if (msymbol.minsym)
- {
- reg->addr = BMSYMBOL_VALUE_ADDRESS (msymbol);
- reg->name = xstrdup (name);
- /* Keep track of the address range for soft registers. */
- if (reg->addr < (CORE_ADDR) soft_min_addr)
- soft_min_addr = reg->addr;
- if (reg->addr > (CORE_ADDR) soft_max_addr)
- soft_max_addr = reg->addr;
- }
- else
- {
- reg->name = 0;
- reg->addr = 0;
- }
- }
- /* Initialize the table of soft register addresses according
- to the symbol table. */
- static void
- m68hc11_initialize_register_info (void)
- {
- int i;
- if (soft_reg_initialized)
- return;
-
- soft_min_addr = INT_MAX;
- soft_max_addr = 0;
- for (i = 0; i < M68HC11_ALL_REGS; i++)
- {
- soft_regs[i].name = 0;
- }
-
- m68hc11_get_register_info (&soft_regs[SOFT_FP_REGNUM], "_.frame");
- m68hc11_get_register_info (&soft_regs[SOFT_TMP_REGNUM], "_.tmp");
- m68hc11_get_register_info (&soft_regs[SOFT_ZS_REGNUM], "_.z");
- soft_regs[SOFT_Z_REGNUM] = soft_regs[SOFT_ZS_REGNUM];
- m68hc11_get_register_info (&soft_regs[SOFT_XY_REGNUM], "_.xy");
- for (i = SOFT_D1_REGNUM; i < M68HC11_MAX_SOFT_REGS; i++)
- {
- char buf[10];
- xsnprintf (buf, sizeof (buf), "_.d%d", i - SOFT_D1_REGNUM + 1);
- m68hc11_get_register_info (&soft_regs[i], buf);
- }
- if (soft_regs[SOFT_FP_REGNUM].name == 0)
- warning (_("No frame soft register found in the symbol table.\n"
- "Stack backtrace will not work."));
- soft_reg_initialized = 1;
- }
- /* Given an address in memory, return the soft register number if
- that address corresponds to a soft register. Returns -1 if not. */
- static int
- m68hc11_which_soft_register (CORE_ADDR addr)
- {
- int i;
-
- if (addr < soft_min_addr || addr > soft_max_addr)
- return -1;
-
- for (i = SOFT_FP_REGNUM; i < M68HC11_ALL_REGS; i++)
- {
- if (soft_regs[i].name && soft_regs[i].addr == addr)
- return i;
- }
- return -1;
- }
- /* Fetch a pseudo register. The 68hc11 soft registers are treated like
- pseudo registers. They are located in memory. Translate the register
- fetch into a memory read. */
- static enum register_status
- m68hc11_pseudo_register_read (struct gdbarch *gdbarch,
- readable_regcache *regcache,
- int regno, gdb_byte *buf)
- {
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- /* The PC is a pseudo reg only for 68HC12 with the memory bank
- addressing mode. */
- if (regno == M68HC12_HARD_PC_REGNUM)
- {
- ULONGEST pc;
- const int regsize = 4;
- enum register_status status;
- status = regcache->cooked_read (HARD_PC_REGNUM, &pc);
- if (status != REG_VALID)
- return status;
- if (pc >= 0x8000 && pc < 0xc000)
- {
- ULONGEST page;
- regcache->cooked_read (HARD_PAGE_REGNUM, &page);
- pc -= 0x8000;
- pc += (page << 14);
- pc += 0x1000000;
- }
- store_unsigned_integer (buf, regsize, byte_order, pc);
- return REG_VALID;
- }
- m68hc11_initialize_register_info ();
-
- /* Fetch a soft register: translate into a memory read. */
- if (soft_regs[regno].name)
- {
- target_read_memory (soft_regs[regno].addr, buf, 2);
- }
- else
- {
- memset (buf, 0, 2);
- }
- return REG_VALID;
- }
- /* Store a pseudo register. Translate the register store
- into a memory write. */
- static void
- m68hc11_pseudo_register_write (struct gdbarch *gdbarch,
- struct regcache *regcache,
- int regno, const gdb_byte *buf)
- {
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- /* The PC is a pseudo reg only for 68HC12 with the memory bank
- addressing mode. */
- if (regno == M68HC12_HARD_PC_REGNUM)
- {
- const int regsize = 4;
- gdb_byte *tmp = (gdb_byte *) alloca (regsize);
- CORE_ADDR pc;
- memcpy (tmp, buf, regsize);
- pc = extract_unsigned_integer (tmp, regsize, byte_order);
- if (pc >= 0x1000000)
- {
- pc -= 0x1000000;
- regcache_cooked_write_unsigned (regcache, HARD_PAGE_REGNUM,
- (pc >> 14) & 0x0ff);
- pc &= 0x03fff;
- regcache_cooked_write_unsigned (regcache, HARD_PC_REGNUM,
- pc + 0x8000);
- }
- else
- regcache_cooked_write_unsigned (regcache, HARD_PC_REGNUM, pc);
- return;
- }
-
- m68hc11_initialize_register_info ();
- /* Store a soft register: translate into a memory write. */
- if (soft_regs[regno].name)
- {
- const int regsize = 2;
- gdb_byte *tmp = (gdb_byte *) alloca (regsize);
- memcpy (tmp, buf, regsize);
- target_write_memory (soft_regs[regno].addr, tmp, regsize);
- }
- }
- static const char *
- m68hc11_register_name (struct gdbarch *gdbarch, int reg_nr)
- {
- if (reg_nr == M68HC12_HARD_PC_REGNUM && use_page_register (gdbarch))
- return "pc";
- if (reg_nr == HARD_PC_REGNUM && use_page_register (gdbarch))
- return "ppc";
-
- if (reg_nr < 0)
- return NULL;
- if (reg_nr >= M68HC11_ALL_REGS)
- return NULL;
- m68hc11_initialize_register_info ();
- /* If we don't know the address of a soft register, pretend it
- does not exist. */
- if (reg_nr > M68HC11_LAST_HARD_REG && soft_regs[reg_nr].name == 0)
- return NULL;
- return m68hc11_register_names[reg_nr];
- }
- constexpr gdb_byte m68hc11_break_insn[] = {0x0};
- typedef BP_MANIPULATION (m68hc11_break_insn) m68hc11_breakpoint;
- /* 68HC11 & 68HC12 prologue analysis. */
- #define MAX_CODES 12
- /* 68HC11 opcodes. */
- #undef M6811_OP_PAGE2
- #define M6811_OP_PAGE2 (0x18)
- #define M6811_OP_LDX (0xde)
- #define M6811_OP_LDX_EXT (0xfe)
- #define M6811_OP_PSHX (0x3c)
- #define M6811_OP_STS (0x9f)
- #define M6811_OP_STS_EXT (0xbf)
- #define M6811_OP_TSX (0x30)
- #define M6811_OP_XGDX (0x8f)
- #define M6811_OP_ADDD (0xc3)
- #define M6811_OP_TXS (0x35)
- #define M6811_OP_DES (0x34)
- /* 68HC12 opcodes. */
- #define M6812_OP_PAGE2 (0x18)
- #define M6812_OP_MOVW (0x01)
- #define M6812_PB_PSHW (0xae)
- #define M6812_OP_STS (0x5f)
- #define M6812_OP_STS_EXT (0x7f)
- #define M6812_OP_LEAS (0x1b)
- #define M6812_OP_PSHX (0x34)
- #define M6812_OP_PSHY (0x35)
- /* Operand extraction. */
- #define OP_DIRECT (0x100) /* 8-byte direct addressing. */
- #define OP_IMM_LOW (0x200) /* Low part of 16-bit constant/address. */
- #define OP_IMM_HIGH (0x300) /* High part of 16-bit constant/address. */
- #define OP_PBYTE (0x400) /* 68HC12 indexed operand. */
- /* Identification of the sequence. */
- enum m6811_seq_type
- {
- P_LAST = 0,
- P_SAVE_REG, /* Save a register on the stack. */
- P_SET_FRAME, /* Setup the frame pointer. */
- P_LOCAL_1, /* Allocate 1 byte for locals. */
- P_LOCAL_2, /* Allocate 2 bytes for locals. */
- P_LOCAL_N /* Allocate N bytes for locals. */
- };
- struct insn_sequence {
- enum m6811_seq_type type;
- unsigned length;
- unsigned short code[MAX_CODES];
- };
- /* Sequence of instructions in the 68HC11 function prologue. */
- static struct insn_sequence m6811_prologue[] = {
- /* Sequences to save a soft-register. */
- { P_SAVE_REG, 3, { M6811_OP_LDX, OP_DIRECT,
- M6811_OP_PSHX } },
- { P_SAVE_REG, 5, { M6811_OP_PAGE2, M6811_OP_LDX, OP_DIRECT,
- M6811_OP_PAGE2, M6811_OP_PSHX } },
- { P_SAVE_REG, 4, { M6811_OP_LDX_EXT, OP_IMM_HIGH, OP_IMM_LOW,
- M6811_OP_PSHX } },
- { P_SAVE_REG, 6, { M6811_OP_PAGE2, M6811_OP_LDX_EXT, OP_IMM_HIGH, OP_IMM_LOW,
- M6811_OP_PAGE2, M6811_OP_PSHX } },
- /* Sequences to allocate local variables. */
- { P_LOCAL_N, 7, { M6811_OP_TSX,
- M6811_OP_XGDX,
- M6811_OP_ADDD, OP_IMM_HIGH, OP_IMM_LOW,
- M6811_OP_XGDX,
- M6811_OP_TXS } },
- { P_LOCAL_N, 11, { M6811_OP_PAGE2, M6811_OP_TSX,
- M6811_OP_PAGE2, M6811_OP_XGDX,
- M6811_OP_ADDD, OP_IMM_HIGH, OP_IMM_LOW,
- M6811_OP_PAGE2, M6811_OP_XGDX,
- M6811_OP_PAGE2, M6811_OP_TXS } },
- { P_LOCAL_1, 1, { M6811_OP_DES } },
- { P_LOCAL_2, 1, { M6811_OP_PSHX } },
- { P_LOCAL_2, 2, { M6811_OP_PAGE2, M6811_OP_PSHX } },
- /* Initialize the frame pointer. */
- { P_SET_FRAME, 2, { M6811_OP_STS, OP_DIRECT } },
- { P_SET_FRAME, 3, { M6811_OP_STS_EXT, OP_IMM_HIGH, OP_IMM_LOW } },
- { P_LAST, 0, { 0 } }
- };
- /* Sequence of instructions in the 68HC12 function prologue. */
- static struct insn_sequence m6812_prologue[] = {
- { P_SAVE_REG, 5, { M6812_OP_PAGE2, M6812_OP_MOVW, M6812_PB_PSHW,
- OP_IMM_HIGH, OP_IMM_LOW } },
- { P_SET_FRAME, 2, { M6812_OP_STS, OP_DIRECT } },
- { P_SET_FRAME, 3, { M6812_OP_STS_EXT, OP_IMM_HIGH, OP_IMM_LOW } },
- { P_LOCAL_N, 2, { M6812_OP_LEAS, OP_PBYTE } },
- { P_LOCAL_2, 1, { M6812_OP_PSHX } },
- { P_LOCAL_2, 1, { M6812_OP_PSHY } },
- { P_LAST, 0 }
- };
- /* Analyze the sequence of instructions starting at the given address.
- Returns a pointer to the sequence when it is recognized and
- the optional value (constant/address) associated with it. */
- static struct insn_sequence *
- m68hc11_analyze_instruction (struct gdbarch *gdbarch,
- struct insn_sequence *seq, CORE_ADDR pc,
- CORE_ADDR *val)
- {
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- unsigned char buffer[MAX_CODES];
- unsigned bufsize;
- unsigned j;
- CORE_ADDR cur_val;
- short v = 0;
- bufsize = 0;
- for (; seq->type != P_LAST; seq++)
- {
- cur_val = 0;
- for (j = 0; j < seq->length; j++)
- {
- if (bufsize < j + 1)
- {
- buffer[bufsize] = read_memory_unsigned_integer (pc + bufsize,
- 1, byte_order);
- bufsize++;
- }
- /* Continue while we match the opcode. */
- if (seq->code[j] == buffer[j])
- continue;
-
- if ((seq->code[j] & 0xf00) == 0)
- break;
-
- /* Extract a sequence parameter (address or constant). */
- switch (seq->code[j])
- {
- case OP_DIRECT:
- cur_val = (CORE_ADDR) buffer[j];
- break;
- case OP_IMM_HIGH:
- cur_val = cur_val & 0x0ff;
- cur_val |= (buffer[j] << 8);
- break;
- case OP_IMM_LOW:
- cur_val &= 0x0ff00;
- cur_val |= buffer[j];
- break;
- case OP_PBYTE:
- if ((buffer[j] & 0xE0) == 0x80)
- {
- v = buffer[j] & 0x1f;
- if (v & 0x10)
- v |= 0xfff0;
- }
- else if ((buffer[j] & 0xfe) == 0xf0)
- {
- v = read_memory_unsigned_integer (pc + j + 1, 1, byte_order);
- if (buffer[j] & 1)
- v |= 0xff00;
- }
- else if (buffer[j] == 0xf2)
- {
- v = read_memory_unsigned_integer (pc + j + 1, 2, byte_order);
- }
- cur_val = v;
- break;
- }
- }
- /* We have a full match. */
- if (j == seq->length)
- {
- *val = cur_val;
- return seq;
- }
- }
- return 0;
- }
- /* Return the instruction that the function at the PC is using. */
- static enum insn_return_kind
- m68hc11_get_return_insn (CORE_ADDR pc)
- {
- struct bound_minimal_symbol sym;
- /* A flag indicating that this is a STO_M68HC12_FAR or STO_M68HC12_INTERRUPT
- function is stored by elfread.c in the high bit of the info field.
- Use this to decide which instruction the function uses to return. */
- sym = lookup_minimal_symbol_by_pc (pc);
- if (sym.minsym == 0)
- return RETURN_RTS;
- if (MSYMBOL_IS_RTC (sym.minsym))
- return RETURN_RTC;
- else if (MSYMBOL_IS_RTI (sym.minsym))
- return RETURN_RTI;
- else
- return RETURN_RTS;
- }
- /* Analyze the function prologue to find some information
- about the function:
- - the PC of the first line (for m68hc11_skip_prologue)
- - the offset of the previous frame saved address (from current frame)
- - the soft registers which are pushed. */
- static CORE_ADDR
- m68hc11_scan_prologue (struct gdbarch *gdbarch, CORE_ADDR pc,
- CORE_ADDR current_pc, struct m68hc11_unwind_cache *info)
- {
- LONGEST save_addr;
- CORE_ADDR func_end;
- int size;
- int found_frame_point;
- int saved_reg;
- int done = 0;
- struct insn_sequence *seq_table;
- info->size = 0;
- info->sp_offset = 0;
- if (pc >= current_pc)
- return current_pc;
- size = 0;
- m68hc11_initialize_register_info ();
- if (pc == 0)
- {
- info->size = 0;
- return pc;
- }
- m68gc11_gdbarch_tdep *tdep = (m68gc11_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- seq_table = tdep->prologue;
-
- /* The 68hc11 stack is as follows:
- | |
- +-----------+
- | |
- | args |
- | |
- +-----------+
- | PC-return |
- +-----------+
- | Old frame |
- +-----------+
- | |
- | Locals |
- | |
- +-----------+ <--- current frame
- | |
- With most processors (like 68K) the previous frame can be computed
- easily because it is always at a fixed offset (see link/unlink).
- That is, locals are accessed with negative offsets, arguments are
- accessed with positive ones. Since 68hc11 only supports offsets
- in the range [0..255], the frame is defined at the bottom of
- locals (see picture).
- The purpose of the analysis made here is to find out the size
- of locals in this function. An alternative to this is to use
- DWARF2 info. This would be better but I don't know how to
- access dwarf2 debug from this function.
-
- Walk from the function entry point to the point where we save
- the frame. While walking instructions, compute the size of bytes
- which are pushed. This gives us the index to access the previous
- frame.
- We limit the search to 128 bytes so that the algorithm is bounded
- in case of random and wrong code. We also stop and abort if
- we find an instruction which is not supposed to appear in the
- prologue (as generated by gcc 2.95, 2.96). */
- func_end = pc + 128;
- found_frame_point = 0;
- info->size = 0;
- save_addr = 0;
- while (!done && pc + 2 < func_end)
- {
- struct insn_sequence *seq;
- CORE_ADDR val;
- seq = m68hc11_analyze_instruction (gdbarch, seq_table, pc, &val);
- if (seq == 0)
- break;
- /* If we are within the instruction group, we can't advance the
- pc nor the stack offset. Otherwise the caller's stack computed
- from the current stack can be wrong. */
- if (pc + seq->length > current_pc)
- break;
- pc = pc + seq->length;
- if (seq->type == P_SAVE_REG)
- {
- if (found_frame_point)
- {
- saved_reg = m68hc11_which_soft_register (val);
- if (saved_reg < 0)
- break;
- save_addr -= 2;
- if (info->saved_regs)
- info->saved_regs[saved_reg].set_addr (save_addr);
- }
- else
- {
- size += 2;
- }
- }
- else if (seq->type == P_SET_FRAME)
- {
- found_frame_point = 1;
- info->size = size;
- }
- else if (seq->type == P_LOCAL_1)
- {
- size += 1;
- }
- else if (seq->type == P_LOCAL_2)
- {
- size += 2;
- }
- else if (seq->type == P_LOCAL_N)
- {
- /* Stack pointer is decremented for the allocation. */
- if (val & 0x8000)
- size -= (int) (val) | 0xffff0000;
- else
- size -= val;
- }
- }
- if (found_frame_point == 0)
- info->sp_offset = size;
- else
- info->sp_offset = -1;
- return pc;
- }
- static CORE_ADDR
- m68hc11_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
- {
- CORE_ADDR func_addr, func_end;
- struct symtab_and_line sal;
- struct m68hc11_unwind_cache tmp_cache = { 0 };
- /* If we have line debugging information, then the end of the
- prologue should be the first assembly instruction of the
- first source line. */
- if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
- {
- sal = find_pc_line (func_addr, 0);
- if (sal.end && sal.end < func_end)
- return sal.end;
- }
- pc = m68hc11_scan_prologue (gdbarch, pc, (CORE_ADDR) -1, &tmp_cache);
- return pc;
- }
- /* Put here the code to store, into fi->saved_regs, the addresses of
- the saved registers of frame described by FRAME_INFO. This
- includes special registers such as pc and fp saved in special ways
- in the stack frame. sp is even more special: the address we return
- for it IS the sp for the next frame. */
- static struct m68hc11_unwind_cache *
- m68hc11_frame_unwind_cache (struct frame_info *this_frame,
- void **this_prologue_cache)
- {
- struct gdbarch *gdbarch = get_frame_arch (this_frame);
- ULONGEST prev_sp;
- ULONGEST this_base;
- struct m68hc11_unwind_cache *info;
- CORE_ADDR current_pc;
- int i;
- if ((*this_prologue_cache))
- return (struct m68hc11_unwind_cache *) (*this_prologue_cache);
- info = FRAME_OBSTACK_ZALLOC (struct m68hc11_unwind_cache);
- (*this_prologue_cache) = info;
- info->saved_regs = trad_frame_alloc_saved_regs (this_frame);
- info->pc = get_frame_func (this_frame);
- info->size = 0;
- info->return_kind = m68hc11_get_return_insn (info->pc);
- /* The SP was moved to the FP. This indicates that a new frame
- was created. Get THIS frame's FP value by unwinding it from
- the next frame. */
- this_base = get_frame_register_unsigned (this_frame, SOFT_FP_REGNUM);
- if (this_base == 0)
- {
- info->base = 0;
- return info;
- }
- current_pc = get_frame_pc (this_frame);
- if (info->pc != 0)
- m68hc11_scan_prologue (gdbarch, info->pc, current_pc, info);
- info->saved_regs[HARD_PC_REGNUM].set_addr (info->size);
- if (info->sp_offset != (CORE_ADDR) -1)
- {
- info->saved_regs[HARD_PC_REGNUM].set_addr (info->sp_offset);
- this_base = get_frame_register_unsigned (this_frame, HARD_SP_REGNUM);
- prev_sp = this_base + info->sp_offset + 2;
- this_base += stack_correction (gdbarch);
- }
- else
- {
- /* The FP points at the last saved register. Adjust the FP back
- to before the first saved register giving the SP. */
- prev_sp = this_base + info->size + 2;
- this_base += stack_correction (gdbarch);
- if (soft_regs[SOFT_FP_REGNUM].name)
- info->saved_regs[SOFT_FP_REGNUM].set_addr (info->size - 2);
- }
- if (info->return_kind == RETURN_RTC)
- {
- prev_sp += 1;
- info->saved_regs[HARD_PAGE_REGNUM].set_addr (info->size);
- info->saved_regs[HARD_PC_REGNUM].set_addr (info->size + 1);
- }
- else if (info->return_kind == RETURN_RTI)
- {
- prev_sp += 7;
- info->saved_regs[HARD_CCR_REGNUM].set_addr (info->size);
- info->saved_regs[HARD_D_REGNUM].set_addr (info->size + 1);
- info->saved_regs[HARD_X_REGNUM].set_addr (info->size + 3);
- info->saved_regs[HARD_Y_REGNUM].set_addr (info->size + 5);
- info->saved_regs[HARD_PC_REGNUM].set_addr (info->size + 7);
- }
- /* Add 1 here to adjust for the post-decrement nature of the push
- instruction. */
- info->prev_sp = prev_sp;
- info->base = this_base;
- /* Adjust all the saved registers so that they contain addresses and not
- offsets. */
- for (i = 0; i < gdbarch_num_cooked_regs (gdbarch); i++)
- if (info->saved_regs[i].is_addr ())
- {
- info->saved_regs[i].set_addr (info->saved_regs[i].addr () + this_base);
- }
- /* The previous frame's SP needed to be computed. Save the computed
- value. */
- info->saved_regs[HARD_SP_REGNUM].set_value (info->prev_sp);
- return info;
- }
- /* Given a GDB frame, determine the address of the calling function's
- frame. This will be used to create a new GDB frame struct. */
- static void
- m68hc11_frame_this_id (struct frame_info *this_frame,
- void **this_prologue_cache,
- struct frame_id *this_id)
- {
- struct m68hc11_unwind_cache *info
- = m68hc11_frame_unwind_cache (this_frame, this_prologue_cache);
- CORE_ADDR base;
- CORE_ADDR func;
- struct frame_id id;
- /* The FUNC is easy. */
- func = get_frame_func (this_frame);
- /* Hopefully the prologue analysis either correctly determined the
- frame's base (which is the SP from the previous frame), or set
- that base to "NULL". */
- base = info->prev_sp;
- if (base == 0)
- return;
- id = frame_id_build (base, func);
- (*this_id) = id;
- }
- static struct value *
- m68hc11_frame_prev_register (struct frame_info *this_frame,
- void **this_prologue_cache, int regnum)
- {
- struct value *value;
- struct m68hc11_unwind_cache *info
- = m68hc11_frame_unwind_cache (this_frame, this_prologue_cache);
- value = trad_frame_get_prev_register (this_frame, info->saved_regs, regnum);
- /* Take into account the 68HC12 specific call (PC + page). */
- if (regnum == HARD_PC_REGNUM
- && info->return_kind == RETURN_RTC
- && use_page_register (get_frame_arch (this_frame)))
- {
- CORE_ADDR pc = value_as_long (value);
- if (pc >= 0x08000 && pc < 0x0c000)
- {
- CORE_ADDR page;
- release_value (value);
- value = trad_frame_get_prev_register (this_frame, info->saved_regs,
- HARD_PAGE_REGNUM);
- page = value_as_long (value);
- release_value (value);
- pc -= 0x08000;
- pc += ((page & 0x0ff) << 14);
- pc += 0x1000000;
- return frame_unwind_got_constant (this_frame, regnum, pc);
- }
- }
- return value;
- }
- static const struct frame_unwind m68hc11_frame_unwind = {
- "m68hc11 prologue",
- NORMAL_FRAME,
- default_frame_unwind_stop_reason,
- m68hc11_frame_this_id,
- m68hc11_frame_prev_register,
- NULL,
- default_frame_sniffer
- };
- static CORE_ADDR
- m68hc11_frame_base_address (struct frame_info *this_frame, void **this_cache)
- {
- struct m68hc11_unwind_cache *info
- = m68hc11_frame_unwind_cache (this_frame, this_cache);
- return info->base;
- }
- static CORE_ADDR
- m68hc11_frame_args_address (struct frame_info *this_frame, void **this_cache)
- {
- CORE_ADDR addr;
- struct m68hc11_unwind_cache *info
- = m68hc11_frame_unwind_cache (this_frame, this_cache);
- addr = info->base + info->size;
- if (info->return_kind == RETURN_RTC)
- addr += 1;
- else if (info->return_kind == RETURN_RTI)
- addr += 7;
- return addr;
- }
- static const struct frame_base m68hc11_frame_base = {
- &m68hc11_frame_unwind,
- m68hc11_frame_base_address,
- m68hc11_frame_base_address,
- m68hc11_frame_args_address
- };
- /* Assuming THIS_FRAME is a dummy, return the frame ID of that dummy
- frame. The frame ID's base needs to match the TOS value saved by
- save_dummy_frame_tos(), and the PC match the dummy frame's breakpoint. */
- static struct frame_id
- m68hc11_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
- {
- ULONGEST tos;
- CORE_ADDR pc = get_frame_pc (this_frame);
- tos = get_frame_register_unsigned (this_frame, SOFT_FP_REGNUM);
- tos += 2;
- return frame_id_build (tos, pc);
- }
- /* Get and print the register from the given frame. */
- static void
- m68hc11_print_register (struct gdbarch *gdbarch, struct ui_file *file,
- struct frame_info *frame, int regno)
- {
- LONGEST rval;
- if (regno == HARD_PC_REGNUM || regno == HARD_SP_REGNUM
- || regno == SOFT_FP_REGNUM || regno == M68HC12_HARD_PC_REGNUM)
- rval = get_frame_register_unsigned (frame, regno);
- else
- rval = get_frame_register_signed (frame, regno);
- if (regno == HARD_A_REGNUM || regno == HARD_B_REGNUM
- || regno == HARD_CCR_REGNUM || regno == HARD_PAGE_REGNUM)
- {
- gdb_printf (file, "0x%02x ", (unsigned char) rval);
- if (regno != HARD_CCR_REGNUM)
- print_longest (file, 'd', 1, rval);
- }
- else
- {
- m68gc11_gdbarch_tdep *tdep
- = (m68gc11_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- if (regno == HARD_PC_REGNUM && tdep->use_page_register)
- {
- ULONGEST page;
- page = get_frame_register_unsigned (frame, HARD_PAGE_REGNUM);
- gdb_printf (file, "0x%02x:%04x ", (unsigned) page,
- (unsigned) rval);
- }
- else
- {
- gdb_printf (file, "0x%04x ", (unsigned) rval);
- if (regno != HARD_PC_REGNUM && regno != HARD_SP_REGNUM
- && regno != SOFT_FP_REGNUM && regno != M68HC12_HARD_PC_REGNUM)
- print_longest (file, 'd', 1, rval);
- }
- }
- if (regno == HARD_CCR_REGNUM)
- {
- /* CCR register */
- int C, Z, N, V;
- unsigned char l = rval & 0xff;
- gdb_printf (file, "%c%c%c%c%c%c%c%c ",
- l & M6811_S_BIT ? 'S' : '-',
- l & M6811_X_BIT ? 'X' : '-',
- l & M6811_H_BIT ? 'H' : '-',
- l & M6811_I_BIT ? 'I' : '-',
- l & M6811_N_BIT ? 'N' : '-',
- l & M6811_Z_BIT ? 'Z' : '-',
- l & M6811_V_BIT ? 'V' : '-',
- l & M6811_C_BIT ? 'C' : '-');
- N = (l & M6811_N_BIT) != 0;
- Z = (l & M6811_Z_BIT) != 0;
- V = (l & M6811_V_BIT) != 0;
- C = (l & M6811_C_BIT) != 0;
- /* Print flags following the h8300. */
- if ((C | Z) == 0)
- gdb_printf (file, "u> ");
- else if ((C | Z) == 1)
- gdb_printf (file, "u<= ");
- else if (C == 0)
- gdb_printf (file, "u< ");
- if (Z == 0)
- gdb_printf (file, "!= ");
- else
- gdb_printf (file, "== ");
- if ((N ^ V) == 0)
- gdb_printf (file, ">= ");
- else
- gdb_printf (file, "< ");
- if ((Z | (N ^ V)) == 0)
- gdb_printf (file, "> ");
- else
- gdb_printf (file, "<= ");
- }
- }
- /* Same as 'info reg' but prints the registers in a different way. */
- static void
- m68hc11_print_registers_info (struct gdbarch *gdbarch, struct ui_file *file,
- struct frame_info *frame, int regno, int cpregs)
- {
- if (regno >= 0)
- {
- const char *name = gdbarch_register_name (gdbarch, regno);
- if (!name || !*name)
- return;
- gdb_printf (file, "%-10s ", name);
- m68hc11_print_register (gdbarch, file, frame, regno);
- gdb_printf (file, "\n");
- }
- else
- {
- int i, nr;
- gdb_printf (file, "PC=");
- m68hc11_print_register (gdbarch, file, frame, HARD_PC_REGNUM);
- gdb_printf (file, " SP=");
- m68hc11_print_register (gdbarch, file, frame, HARD_SP_REGNUM);
- gdb_printf (file, " FP=");
- m68hc11_print_register (gdbarch, file, frame, SOFT_FP_REGNUM);
- gdb_printf (file, "\nCCR=");
- m68hc11_print_register (gdbarch, file, frame, HARD_CCR_REGNUM);
-
- gdb_printf (file, "\nD=");
- m68hc11_print_register (gdbarch, file, frame, HARD_D_REGNUM);
- gdb_printf (file, " X=");
- m68hc11_print_register (gdbarch, file, frame, HARD_X_REGNUM);
- gdb_printf (file, " Y=");
- m68hc11_print_register (gdbarch, file, frame, HARD_Y_REGNUM);
-
- m68gc11_gdbarch_tdep *tdep = (m68gc11_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- if (tdep->use_page_register)
- {
- gdb_printf (file, "\nPage=");
- m68hc11_print_register (gdbarch, file, frame, HARD_PAGE_REGNUM);
- }
- gdb_printf (file, "\n");
- nr = 0;
- for (i = SOFT_D1_REGNUM; i < M68HC11_ALL_REGS; i++)
- {
- /* Skip registers which are not defined in the symbol table. */
- if (soft_regs[i].name == 0)
- continue;
-
- gdb_printf (file, "D%d=", i - SOFT_D1_REGNUM + 1);
- m68hc11_print_register (gdbarch, file, frame, i);
- nr++;
- if ((nr % 8) == 7)
- gdb_printf (file, "\n");
- else
- gdb_printf (file, " ");
- }
- if (nr && (nr % 8) != 7)
- gdb_printf (file, "\n");
- }
- }
- static CORE_ADDR
- m68hc11_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
- struct regcache *regcache, CORE_ADDR bp_addr,
- int nargs, struct value **args, CORE_ADDR sp,
- function_call_return_method return_method,
- CORE_ADDR struct_addr)
- {
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- int argnum;
- int first_stack_argnum;
- struct type *type;
- const gdb_byte *val;
- gdb_byte buf[2];
-
- first_stack_argnum = 0;
- if (return_method == return_method_struct)
- regcache_cooked_write_unsigned (regcache, HARD_D_REGNUM, struct_addr);
- else if (nargs > 0)
- {
- type = value_type (args[0]);
- /* First argument is passed in D and X registers. */
- if (TYPE_LENGTH (type) <= 4)
- {
- ULONGEST v;
- v = extract_unsigned_integer (value_contents (args[0]).data (),
- TYPE_LENGTH (type), byte_order);
- first_stack_argnum = 1;
- regcache_cooked_write_unsigned (regcache, HARD_D_REGNUM, v);
- if (TYPE_LENGTH (type) > 2)
- {
- v >>= 16;
- regcache_cooked_write_unsigned (regcache, HARD_X_REGNUM, v);
- }
- }
- }
- for (argnum = nargs - 1; argnum >= first_stack_argnum; argnum--)
- {
- type = value_type (args[argnum]);
- if (TYPE_LENGTH (type) & 1)
- {
- static gdb_byte zero = 0;
- sp--;
- write_memory (sp, &zero, 1);
- }
- val = value_contents (args[argnum]).data ();
- sp -= TYPE_LENGTH (type);
- write_memory (sp, val, TYPE_LENGTH (type));
- }
- /* Store return address. */
- sp -= 2;
- store_unsigned_integer (buf, 2, byte_order, bp_addr);
- write_memory (sp, buf, 2);
- /* Finally, update the stack pointer... */
- sp -= stack_correction (gdbarch);
- regcache_cooked_write_unsigned (regcache, HARD_SP_REGNUM, sp);
- /* ...and fake a frame pointer. */
- regcache_cooked_write_unsigned (regcache, SOFT_FP_REGNUM, sp);
- /* DWARF2/GCC uses the stack address *before* the function call as a
- frame's CFA. */
- return sp + 2;
- }
- /* Return the GDB type object for the "standard" data type
- of data in register N. */
- static struct type *
- m68hc11_register_type (struct gdbarch *gdbarch, int reg_nr)
- {
- switch (reg_nr)
- {
- case HARD_PAGE_REGNUM:
- case HARD_A_REGNUM:
- case HARD_B_REGNUM:
- case HARD_CCR_REGNUM:
- return builtin_type (gdbarch)->builtin_uint8;
- case M68HC12_HARD_PC_REGNUM:
- return builtin_type (gdbarch)->builtin_uint32;
- default:
- return builtin_type (gdbarch)->builtin_uint16;
- }
- }
- static void
- m68hc11_store_return_value (struct type *type, struct regcache *regcache,
- const gdb_byte *valbuf)
- {
- int len;
- len = TYPE_LENGTH (type);
- /* First argument is passed in D and X registers. */
- if (len <= 2)
- regcache->raw_write_part (HARD_D_REGNUM, 2 - len, len, valbuf);
- else if (len <= 4)
- {
- regcache->raw_write_part (HARD_X_REGNUM, 4 - len, len - 2, valbuf);
- regcache->raw_write (HARD_D_REGNUM, valbuf + (len - 2));
- }
- else
- error (_("return of value > 4 is not supported."));
- }
- /* Given a return value in `regcache' with a type `type',
- extract and copy its value into `valbuf'. */
- static void
- m68hc11_extract_return_value (struct type *type, struct regcache *regcache,
- void *valbuf)
- {
- gdb_byte buf[M68HC11_REG_SIZE];
- regcache->raw_read (HARD_D_REGNUM, buf);
- switch (TYPE_LENGTH (type))
- {
- case 1:
- memcpy (valbuf, buf + 1, 1);
- break;
- case 2:
- memcpy (valbuf, buf, 2);
- break;
- case 3:
- memcpy ((char*) valbuf + 1, buf, 2);
- regcache->raw_read (HARD_X_REGNUM, buf);
- memcpy (valbuf, buf + 1, 1);
- break;
- case 4:
- memcpy ((char*) valbuf + 2, buf, 2);
- regcache->raw_read (HARD_X_REGNUM, buf);
- memcpy (valbuf, buf, 2);
- break;
- default:
- error (_("bad size for return value"));
- }
- }
- static enum return_value_convention
- m68hc11_return_value (struct gdbarch *gdbarch, struct value *function,
- struct type *valtype, struct regcache *regcache,
- gdb_byte *readbuf, const gdb_byte *writebuf)
- {
- if (valtype->code () == TYPE_CODE_STRUCT
- || valtype->code () == TYPE_CODE_UNION
- || valtype->code () == TYPE_CODE_ARRAY
- || TYPE_LENGTH (valtype) > 4)
- return RETURN_VALUE_STRUCT_CONVENTION;
- else
- {
- if (readbuf != NULL)
- m68hc11_extract_return_value (valtype, regcache, readbuf);
- if (writebuf != NULL)
- m68hc11_store_return_value (valtype, regcache, writebuf);
- return RETURN_VALUE_REGISTER_CONVENTION;
- }
- }
- /* Test whether the ELF symbol corresponds to a function using rtc or
- rti to return. */
-
- static void
- m68hc11_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym)
- {
- unsigned char flags;
- flags = ((elf_symbol_type *)sym)->internal_elf_sym.st_other;
- if (flags & STO_M68HC12_FAR)
- MSYMBOL_SET_RTC (msym);
- if (flags & STO_M68HC12_INTERRUPT)
- MSYMBOL_SET_RTI (msym);
- }
- /* 68HC11/68HC12 register groups.
- Identify real hard registers and soft registers used by gcc. */
- static const reggroup *m68hc11_soft_reggroup;
- static const reggroup *m68hc11_hard_reggroup;
- static void
- m68hc11_init_reggroups (void)
- {
- m68hc11_hard_reggroup = reggroup_new ("hard", USER_REGGROUP);
- m68hc11_soft_reggroup = reggroup_new ("soft", USER_REGGROUP);
- }
- static void
- m68hc11_add_reggroups (struct gdbarch *gdbarch)
- {
- reggroup_add (gdbarch, m68hc11_hard_reggroup);
- reggroup_add (gdbarch, m68hc11_soft_reggroup);
- }
- static int
- m68hc11_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
- const struct reggroup *group)
- {
- /* We must save the real hard register as well as gcc
- soft registers including the frame pointer. */
- if (group == save_reggroup || group == restore_reggroup)
- {
- return (regnum <= gdbarch_num_regs (gdbarch)
- || ((regnum == SOFT_FP_REGNUM
- || regnum == SOFT_TMP_REGNUM
- || regnum == SOFT_ZS_REGNUM
- || regnum == SOFT_XY_REGNUM)
- && m68hc11_register_name (gdbarch, regnum)));
- }
- /* Group to identify gcc soft registers (d1..dN). */
- if (group == m68hc11_soft_reggroup)
- {
- return regnum >= SOFT_D1_REGNUM
- && m68hc11_register_name (gdbarch, regnum);
- }
- if (group == m68hc11_hard_reggroup)
- {
- return regnum == HARD_PC_REGNUM || regnum == HARD_SP_REGNUM
- || regnum == HARD_X_REGNUM || regnum == HARD_D_REGNUM
- || regnum == HARD_Y_REGNUM || regnum == HARD_CCR_REGNUM;
- }
- return default_register_reggroup_p (gdbarch, regnum, group);
- }
- static struct gdbarch *
- m68hc11_gdbarch_init (struct gdbarch_info info,
- struct gdbarch_list *arches)
- {
- struct gdbarch *gdbarch;
- int elf_flags;
- soft_reg_initialized = 0;
- /* Extract the elf_flags if available. */
- if (info.abfd != NULL
- && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour)
- elf_flags = elf_elfheader (info.abfd)->e_flags;
- else
- elf_flags = 0;
- /* Try to find a pre-existing architecture. */
- for (arches = gdbarch_list_lookup_by_info (arches, &info);
- arches != NULL;
- arches = gdbarch_list_lookup_by_info (arches->next, &info))
- {
- m68gc11_gdbarch_tdep *tdep
- = (m68gc11_gdbarch_tdep *) gdbarch_tdep (arches->gdbarch);
- if (tdep->elf_flags != elf_flags)
- continue;
- return arches->gdbarch;
- }
- /* Need a new architecture. Fill in a target specific vector. */
- m68gc11_gdbarch_tdep *tdep = new m68gc11_gdbarch_tdep;
- gdbarch = gdbarch_alloc (&info, tdep);
- tdep->elf_flags = elf_flags;
- switch (info.bfd_arch_info->arch)
- {
- case bfd_arch_m68hc11:
- tdep->stack_correction = 1;
- tdep->use_page_register = 0;
- tdep->prologue = m6811_prologue;
- set_gdbarch_addr_bit (gdbarch, 16);
- set_gdbarch_num_pseudo_regs (gdbarch, M68HC11_NUM_PSEUDO_REGS);
- set_gdbarch_pc_regnum (gdbarch, HARD_PC_REGNUM);
- set_gdbarch_num_regs (gdbarch, M68HC11_NUM_REGS);
- break;
- case bfd_arch_m68hc12:
- tdep->stack_correction = 0;
- tdep->use_page_register = elf_flags & E_M68HC12_BANKS;
- tdep->prologue = m6812_prologue;
- set_gdbarch_addr_bit (gdbarch, elf_flags & E_M68HC12_BANKS ? 32 : 16);
- set_gdbarch_num_pseudo_regs (gdbarch,
- elf_flags & E_M68HC12_BANKS
- ? M68HC12_NUM_PSEUDO_REGS
- : M68HC11_NUM_PSEUDO_REGS);
- set_gdbarch_pc_regnum (gdbarch, elf_flags & E_M68HC12_BANKS
- ? M68HC12_HARD_PC_REGNUM : HARD_PC_REGNUM);
- set_gdbarch_num_regs (gdbarch, elf_flags & E_M68HC12_BANKS
- ? M68HC12_NUM_REGS : M68HC11_NUM_REGS);
- break;
- default:
- break;
- }
- /* Initially set everything according to the ABI.
- Use 16-bit integers since it will be the case for most
- programs. The size of these types should normally be set
- according to the dwarf2 debug information. */
- set_gdbarch_short_bit (gdbarch, 16);
- set_gdbarch_int_bit (gdbarch, elf_flags & E_M68HC11_I32 ? 32 : 16);
- set_gdbarch_float_bit (gdbarch, 32);
- if (elf_flags & E_M68HC11_F64)
- {
- set_gdbarch_double_bit (gdbarch, 64);
- set_gdbarch_double_format (gdbarch, floatformats_ieee_double);
- }
- else
- {
- set_gdbarch_double_bit (gdbarch, 32);
- set_gdbarch_double_format (gdbarch, floatformats_ieee_single);
- }
- set_gdbarch_long_double_bit (gdbarch, 64);
- set_gdbarch_long_bit (gdbarch, 32);
- set_gdbarch_ptr_bit (gdbarch, 16);
- set_gdbarch_long_long_bit (gdbarch, 64);
- /* Characters are unsigned. */
- set_gdbarch_char_signed (gdbarch, 0);
- /* Set register info. */
- set_gdbarch_fp0_regnum (gdbarch, -1);
- set_gdbarch_sp_regnum (gdbarch, HARD_SP_REGNUM);
- set_gdbarch_register_name (gdbarch, m68hc11_register_name);
- set_gdbarch_register_type (gdbarch, m68hc11_register_type);
- set_gdbarch_pseudo_register_read (gdbarch, m68hc11_pseudo_register_read);
- set_gdbarch_pseudo_register_write (gdbarch, m68hc11_pseudo_register_write);
- set_gdbarch_push_dummy_call (gdbarch, m68hc11_push_dummy_call);
- set_gdbarch_return_value (gdbarch, m68hc11_return_value);
- set_gdbarch_skip_prologue (gdbarch, m68hc11_skip_prologue);
- set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
- set_gdbarch_breakpoint_kind_from_pc (gdbarch,
- m68hc11_breakpoint::kind_from_pc);
- set_gdbarch_sw_breakpoint_from_kind (gdbarch,
- m68hc11_breakpoint::bp_from_kind);
- m68hc11_add_reggroups (gdbarch);
- set_gdbarch_register_reggroup_p (gdbarch, m68hc11_register_reggroup_p);
- set_gdbarch_print_registers_info (gdbarch, m68hc11_print_registers_info);
- /* Hook in the DWARF CFI frame unwinder. */
- dwarf2_append_unwinders (gdbarch);
- frame_unwind_append_unwinder (gdbarch, &m68hc11_frame_unwind);
- frame_base_set_default (gdbarch, &m68hc11_frame_base);
-
- /* Methods for saving / extracting a dummy frame's ID. The ID's
- stack address must match the SP value returned by
- PUSH_DUMMY_CALL, and saved by generic_save_dummy_frame_tos. */
- set_gdbarch_dummy_id (gdbarch, m68hc11_dummy_id);
- /* Minsymbol frobbing. */
- set_gdbarch_elf_make_msymbol_special (gdbarch,
- m68hc11_elf_make_msymbol_special);
- set_gdbarch_believe_pcc_promotion (gdbarch, 1);
- return gdbarch;
- }
- void _initialize_m68hc11_tdep ();
- void
- _initialize_m68hc11_tdep ()
- {
- register_gdbarch_init (bfd_arch_m68hc11, m68hc11_gdbarch_init);
- register_gdbarch_init (bfd_arch_m68hc12, m68hc11_gdbarch_init);
- m68hc11_init_reggroups ();
- }
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