#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 "gdb_string.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 "target.h"
#include "opcode/m68hc11.h"
#include "elf/m68hc11.h"
#include "elf-bfd.h"
#define MSYMBOL_SET_RTC(msym) \
MSYMBOL_INFO (msym) = (char *) (((long) MSYMBOL_INFO (msym)) \
| 0x80000000)
#define MSYMBOL_SET_RTI(msym) \
MSYMBOL_INFO (msym) = (char *) (((long) MSYMBOL_INFO (msym)) \
| 0x40000000)
#define MSYMBOL_IS_RTC(msym) \
(((long) MSYMBOL_INFO (msym) & 0x80000000) != 0)
#define MSYMBOL_IS_RTI(msym) \
(((long) MSYMBOL_INFO (msym) & 0x40000000) != 0)
enum insn_return_kind {
RETURN_RTS,
RETURN_RTC,
RETURN_RTI
};
#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
#define HARD_PAGE_REGNUM 8
#define M68HC11_LAST_HARD_REG (HARD_PAGE_REGNUM)
#define SOFT_Z_REGNUM 8
#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 (8)
#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 gdbarch_tdep
{
int stack_correction;
struct insn_sequence *prologue;
int use_page_register;
int elf_flags;
};
#define M6811_TDEP gdbarch_tdep (current_gdbarch)
#define STACK_CORRECTION (M6811_TDEP->stack_correction)
#define USE_PAGE_REGISTER (M6811_TDEP->use_page_register)
struct m68hc11_unwind_cache
{
CORE_ADDR prev_sp;
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;
struct trad_frame_saved_reg *saved_regs;
};
static 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;
static void
m68hc11_get_register_info (struct m68hc11_soft_reg *reg, const char *name)
{
struct minimal_symbol *msymbol;
msymbol = lookup_minimal_symbol (name, NULL, NULL);
if (msymbol)
{
reg->addr = SYMBOL_VALUE_ADDRESS (msymbol);
reg->name = xstrdup (name);
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;
}
}
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];
sprintf (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;
}
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;
}
static void
m68hc11_pseudo_register_read (struct gdbarch *gdbarch,
struct regcache *regcache,
int regno, void *buf)
{
if (regno == M68HC12_HARD_PC_REGNUM)
{
ULONGEST pc;
const int regsize = TYPE_LENGTH (builtin_type_uint32);
regcache_cooked_read_unsigned (regcache, HARD_PC_REGNUM, &pc);
if (pc >= 0x8000 && pc < 0xc000)
{
ULONGEST page;
regcache_cooked_read_unsigned (regcache, HARD_PAGE_REGNUM, &page);
pc -= 0x8000;
pc += (page << 14);
pc += 0x1000000;
}
store_unsigned_integer (buf, regsize, pc);
return;
}
m68hc11_initialize_register_info ();
if (soft_regs[regno].name)
{
target_read_memory (soft_regs[regno].addr, buf, 2);
}
else
{
memset (buf, 0, 2);
}
}
static void
m68hc11_pseudo_register_write (struct gdbarch *gdbarch,
struct regcache *regcache,
int regno, const void *buf)
{
if (regno == M68HC12_HARD_PC_REGNUM)
{
const int regsize = TYPE_LENGTH (builtin_type_uint32);
char *tmp = alloca (regsize);
CORE_ADDR pc;
memcpy (tmp, buf, regsize);
pc = extract_unsigned_integer (tmp, regsize);
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 ();
if (soft_regs[regno].name)
{
const int regsize = 2;
char *tmp = alloca (regsize);
memcpy (tmp, buf, regsize);
target_write_memory (soft_regs[regno].addr, tmp, regsize);
}
}
static const char *
m68hc11_register_name (int reg_nr)
{
if (reg_nr == M68HC12_HARD_PC_REGNUM && USE_PAGE_REGISTER)
return "pc";
if (reg_nr == HARD_PC_REGNUM && USE_PAGE_REGISTER)
return "ppc";
if (reg_nr < 0)
return NULL;
if (reg_nr >= M68HC11_ALL_REGS)
return NULL;
m68hc11_initialize_register_info ();
if (reg_nr > M68HC11_LAST_HARD_REG && soft_regs[reg_nr].name == 0)
return NULL;
return m68hc11_register_names[reg_nr];
}
static const unsigned char *
m68hc11_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
{
static unsigned char breakpoint[] = {0x0};
*lenptr = sizeof (breakpoint);
return breakpoint;
}
#define MAX_CODES 12
#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)
#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)
#define OP_DIRECT (0x100)
#define OP_IMM_LOW (0x200)
#define OP_IMM_HIGH (0x300)
#define OP_PBYTE (0x400)
enum m6811_seq_type
{
P_LAST = 0,
P_SAVE_REG,
P_SET_FRAME,
P_LOCAL_1,
P_LOCAL_2,
P_LOCAL_N
};
struct insn_sequence {
enum m6811_seq_type type;
unsigned length;
unsigned short code[MAX_CODES];
};
static struct insn_sequence m6811_prologue[] = {
{ 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 } },
{ 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 } },
{ 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 } }
};
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 }
};
static struct insn_sequence *
m68hc11_analyze_instruction (struct insn_sequence *seq, CORE_ADDR pc,
CORE_ADDR *val)
{
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);
bufsize++;
}
if (seq->code[j] == buffer[j])
continue;
if ((seq->code[j] & 0xf00) == 0)
break;
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);
if (buffer[j] & 1)
v |= 0xff00;
}
else if (buffer[j] == 0xf2)
{
v = read_memory_unsigned_integer (pc + j + 1, 2);
}
cur_val = v;
break;
}
}
if (j == seq->length)
{
*val = cur_val;
return seq;
}
}
return 0;
}
static enum insn_return_kind
m68hc11_get_return_insn (CORE_ADDR pc)
{
struct minimal_symbol *sym;
sym = lookup_minimal_symbol_by_pc (pc);
if (sym == 0)
return RETURN_RTS;
if (MSYMBOL_IS_RTC (sym))
return RETURN_RTC;
else if (MSYMBOL_IS_RTI (sym))
return RETURN_RTI;
else
return RETURN_RTS;
}
static CORE_ADDR
m68hc11_scan_prologue (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;
}
seq_table = gdbarch_tdep (current_gdbarch)->prologue;
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 (seq_table, pc, &val);
if (seq == 0)
break;
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;
info->saved_regs[saved_reg].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)
{
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 (CORE_ADDR pc)
{
CORE_ADDR func_addr, func_end;
struct symtab_and_line sal;
struct m68hc11_unwind_cache tmp_cache = { 0 };
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 (pc, (CORE_ADDR) -1, &tmp_cache);
return pc;
}
static CORE_ADDR
m68hc11_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
{
ULONGEST pc;
frame_unwind_unsigned_register (next_frame, gdbarch_pc_regnum (gdbarch),
&pc);
return pc;
}
struct m68hc11_unwind_cache *
m68hc11_frame_unwind_cache (struct frame_info *next_frame,
void **this_prologue_cache)
{
ULONGEST prev_sp;
ULONGEST this_base;
struct m68hc11_unwind_cache *info;
CORE_ADDR current_pc;
int i;
if ((*this_prologue_cache))
return (*this_prologue_cache);
info = FRAME_OBSTACK_ZALLOC (struct m68hc11_unwind_cache);
(*this_prologue_cache) = info;
info->saved_regs = trad_frame_alloc_saved_regs (next_frame);
info->pc = frame_func_unwind (next_frame);
info->size = 0;
info->return_kind = m68hc11_get_return_insn (info->pc);
frame_unwind_unsigned_register (next_frame, SOFT_FP_REGNUM, &this_base);
if (this_base == 0)
{
info->base = 0;
return info;
}
current_pc = frame_pc_unwind (next_frame);
if (info->pc != 0)
m68hc11_scan_prologue (info->pc, current_pc, info);
info->saved_regs[HARD_PC_REGNUM].addr = info->size;
if (info->sp_offset != (CORE_ADDR) -1)
{
info->saved_regs[HARD_PC_REGNUM].addr = info->sp_offset;
frame_unwind_unsigned_register (next_frame, HARD_SP_REGNUM, &this_base);
prev_sp = this_base + info->sp_offset + 2;
this_base += STACK_CORRECTION;
}
else
{
prev_sp = this_base + info->size + 2;
this_base += STACK_CORRECTION;
if (soft_regs[SOFT_FP_REGNUM].name)
info->saved_regs[SOFT_FP_REGNUM].addr = info->size - 2;
}
if (info->return_kind == RETURN_RTC)
{
prev_sp += 1;
info->saved_regs[HARD_PAGE_REGNUM].addr = info->size;
info->saved_regs[HARD_PC_REGNUM].addr = info->size + 1;
}
else if (info->return_kind == RETURN_RTI)
{
prev_sp += 7;
info->saved_regs[HARD_CCR_REGNUM].addr = info->size;
info->saved_regs[HARD_D_REGNUM].addr = info->size + 1;
info->saved_regs[HARD_X_REGNUM].addr = info->size + 3;
info->saved_regs[HARD_Y_REGNUM].addr = info->size + 5;
info->saved_regs[HARD_PC_REGNUM].addr = info->size + 7;
}
info->prev_sp = prev_sp;
info->base = this_base;
for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS - 1; i++)
if (trad_frame_addr_p (info->saved_regs, i))
{
info->saved_regs[i].addr += this_base;
}
trad_frame_set_value (info->saved_regs, HARD_SP_REGNUM, info->prev_sp);
return info;
}
static void
m68hc11_frame_this_id (struct frame_info *next_frame,
void **this_prologue_cache,
struct frame_id *this_id)
{
struct m68hc11_unwind_cache *info
= m68hc11_frame_unwind_cache (next_frame, this_prologue_cache);
CORE_ADDR base;
CORE_ADDR func;
struct frame_id id;
func = frame_func_unwind (next_frame);
base = info->prev_sp;
if (base == 0)
return;
id = frame_id_build (base, func);
(*this_id) = id;
}
static void
m68hc11_frame_prev_register (struct frame_info *next_frame,
void **this_prologue_cache,
int regnum, enum opt_state *optimizedp,
enum lval_type *lvalp, CORE_ADDR *addrp,
int *realnump, void *bufferp)
{
struct m68hc11_unwind_cache *info
= m68hc11_frame_unwind_cache (next_frame, this_prologue_cache);
trad_frame_get_prev_register (next_frame, info->saved_regs, regnum,
optimizedp, lvalp, addrp, realnump, bufferp);
if (regnum == HARD_PC_REGNUM)
{
if (info->return_kind == RETURN_RTC
&& *addrp >= 0x08000 && *addrp < 0x0c000
&& USE_PAGE_REGISTER)
{
int page_optimized;
CORE_ADDR page;
trad_frame_get_prev_register (next_frame, info->saved_regs,
HARD_PAGE_REGNUM, &page_optimized,
0, &page, 0, 0);
*addrp -= 0x08000;
*addrp += ((page & 0x0ff) << 14);
*addrp += 0x1000000;
}
}
}
static const struct frame_unwind m68hc11_frame_unwind = {
NORMAL_FRAME,
m68hc11_frame_this_id,
m68hc11_frame_prev_register
};
const struct frame_unwind *
m68hc11_frame_sniffer (struct frame_info *next_frame)
{
return &m68hc11_frame_unwind;
}
static CORE_ADDR
m68hc11_frame_base_address (struct frame_info *next_frame, void **this_cache)
{
struct m68hc11_unwind_cache *info
= m68hc11_frame_unwind_cache (next_frame, this_cache);
return info->base;
}
static CORE_ADDR
m68hc11_frame_args_address (struct frame_info *next_frame, void **this_cache)
{
CORE_ADDR addr;
struct m68hc11_unwind_cache *info
= m68hc11_frame_unwind_cache (next_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
};
static CORE_ADDR
m68hc11_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
{
ULONGEST sp;
frame_unwind_unsigned_register (next_frame, HARD_SP_REGNUM, &sp);
return sp;
}
static struct frame_id
m68hc11_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
{
ULONGEST tos;
CORE_ADDR pc = frame_pc_unwind (next_frame);
frame_unwind_unsigned_register (next_frame, SOFT_FP_REGNUM, &tos);
tos += 2;
return frame_id_build (tos, pc);
}
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)
{
fprintf_filtered (file, "0x%02x ", (unsigned char) rval);
if (regno != HARD_CCR_REGNUM)
print_longest (file, 'd', 1, rval);
}
else
{
if (regno == HARD_PC_REGNUM && gdbarch_tdep (gdbarch)->use_page_register)
{
ULONGEST page;
page = get_frame_register_unsigned (frame, HARD_PAGE_REGNUM);
fprintf_filtered (file, "0x%02x:%04x ", (unsigned) page,
(unsigned) rval);
}
else
{
fprintf_filtered (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)
{
int C, Z, N, V;
unsigned char l = rval & 0xff;
fprintf_filtered (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;
if ((C | Z) == 0)
fprintf_filtered (file, "u> ");
else if ((C | Z) == 1)
fprintf_filtered (file, "u<= ");
else if (C == 0)
fprintf_filtered (file, "u< ");
if (Z == 0)
fprintf_filtered (file, "!= ");
else
fprintf_filtered (file, "== ");
if ((N ^ V) == 0)
fprintf_filtered (file, ">= ");
else
fprintf_filtered (file, "< ");
if ((Z | (N ^ V)) == 0)
fprintf_filtered (file, "> ");
else
fprintf_filtered (file, "<= ");
}
}
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;
fprintf_filtered (file, "%-10s ", name);
m68hc11_print_register (gdbarch, file, frame, regno);
fprintf_filtered (file, "\n");
}
else
{
int i, nr;
fprintf_filtered (file, "PC=");
m68hc11_print_register (gdbarch, file, frame, HARD_PC_REGNUM);
fprintf_filtered (file, " SP=");
m68hc11_print_register (gdbarch, file, frame, HARD_SP_REGNUM);
fprintf_filtered (file, " FP=");
m68hc11_print_register (gdbarch, file, frame, SOFT_FP_REGNUM);
fprintf_filtered (file, "\nCCR=");
m68hc11_print_register (gdbarch, file, frame, HARD_CCR_REGNUM);
fprintf_filtered (file, "\nD=");
m68hc11_print_register (gdbarch, file, frame, HARD_D_REGNUM);
fprintf_filtered (file, " X=");
m68hc11_print_register (gdbarch, file, frame, HARD_X_REGNUM);
fprintf_filtered (file, " Y=");
m68hc11_print_register (gdbarch, file, frame, HARD_Y_REGNUM);
if (gdbarch_tdep (gdbarch)->use_page_register)
{
fprintf_filtered (file, "\nPage=");
m68hc11_print_register (gdbarch, file, frame, HARD_PAGE_REGNUM);
}
fprintf_filtered (file, "\n");
nr = 0;
for (i = SOFT_D1_REGNUM; i < M68HC11_ALL_REGS; i++)
{
if (soft_regs[i].name == 0)
continue;
fprintf_filtered (file, "D%d=", i - SOFT_D1_REGNUM + 1);
m68hc11_print_register (gdbarch, file, frame, i);
nr++;
if ((nr % 8) == 7)
fprintf_filtered (file, "\n");
else
fprintf_filtered (file, " ");
}
if (nr && (nr % 8) != 7)
fprintf_filtered (file, "\n");
}
}
static CORE_ADDR
m68hc11_stack_align (CORE_ADDR addr)
{
return ((addr + 1) & -2);
}
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,
int struct_return, CORE_ADDR struct_addr)
{
int argnum;
int first_stack_argnum;
struct type *type;
char *val;
int len;
char buf[2];
first_stack_argnum = 0;
if (struct_return)
{
regcache_cooked_write_unsigned (regcache, HARD_D_REGNUM,
struct_addr + STACK_CORRECTION);
}
else if (nargs > 0)
{
type = value_type (args[0]);
len = TYPE_LENGTH (type);
if (len <= 4)
{
ULONGEST v;
v = extract_unsigned_integer (value_contents (args[0]), len);
first_stack_argnum = 1;
regcache_cooked_write_unsigned (regcache, HARD_D_REGNUM, v);
if (len > 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]);
len = TYPE_LENGTH (type);
if (len & 1)
{
static char zero = 0;
sp--;
write_memory (sp, &zero, 1);
}
val = (char*) value_contents (args[argnum]);
sp -= len;
write_memory (sp, val, len);
}
sp -= 2;
store_unsigned_integer (buf, 2, bp_addr);
write_memory (sp, buf, 2);
sp -= STACK_CORRECTION;
regcache_cooked_write_unsigned (regcache, HARD_SP_REGNUM, sp);
regcache_cooked_write_unsigned (regcache, SOFT_FP_REGNUM, sp);
return sp + 2;
}
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_uint8;
case M68HC12_HARD_PC_REGNUM:
return builtin_type_uint32;
default:
return builtin_type_uint16;
}
}
static void
m68hc11_store_return_value (struct type *type, struct regcache *regcache,
const void *valbuf)
{
int len;
len = TYPE_LENGTH (type);
if (len <= 2)
regcache_raw_write_part (regcache, HARD_D_REGNUM, 2 - len, len, valbuf);
else if (len <= 4)
{
regcache_raw_write_part (regcache, HARD_X_REGNUM, 4 - len,
len - 2, valbuf);
regcache_raw_write (regcache, HARD_D_REGNUM, (char*) valbuf + (len - 2));
}
else
error (_("return of value > 4 is not supported."));
}
static void
m68hc11_extract_return_value (struct type *type, struct regcache *regcache,
void *valbuf)
{
int len = TYPE_LENGTH (type);
char buf[M68HC11_REG_SIZE];
regcache_raw_read (regcache, HARD_D_REGNUM, buf);
switch (len)
{
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 (regcache, HARD_X_REGNUM, buf);
memcpy (valbuf, buf + 1, 1);
break;
case 4:
memcpy ((char*) valbuf + 2, buf, 2);
regcache_raw_read (regcache, HARD_X_REGNUM, buf);
memcpy (valbuf, buf, 2);
break;
default:
error (_("bad size for return value"));
}
}
enum return_value_convention
m68hc11_return_value (struct gdbarch *gdbarch, struct type *valtype,
struct regcache *regcache, void *readbuf,
const void *writebuf)
{
if (TYPE_CODE (valtype) == TYPE_CODE_STRUCT
|| TYPE_CODE (valtype) == TYPE_CODE_UNION
|| TYPE_CODE (valtype) == 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;
}
}
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);
}
static int
gdb_print_insn_m68hc11 (bfd_vma memaddr, disassemble_info *info)
{
if (TARGET_ARCHITECTURE->arch == bfd_arch_m68hc11)
return print_insn_m68hc11 (memaddr, info);
else
return print_insn_m68hc12 (memaddr, info);
}
static struct reggroup *m68hc11_soft_reggroup;
static struct 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);
reggroup_add (gdbarch, general_reggroup);
reggroup_add (gdbarch, float_reggroup);
reggroup_add (gdbarch, all_reggroup);
reggroup_add (gdbarch, save_reggroup);
reggroup_add (gdbarch, restore_reggroup);
reggroup_add (gdbarch, vector_reggroup);
reggroup_add (gdbarch, system_reggroup);
}
static int
m68hc11_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
struct reggroup *group)
{
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 (regnum)));
}
if (group == m68hc11_soft_reggroup)
{
return regnum >= SOFT_D1_REGNUM && m68hc11_register_name (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;
struct gdbarch_tdep *tdep;
int elf_flags;
soft_reg_initialized = 0;
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;
for (arches = gdbarch_list_lookup_by_info (arches, &info);
arches != NULL;
arches = gdbarch_list_lookup_by_info (arches->next, &info))
{
if (gdbarch_tdep (arches->gdbarch)->elf_flags != elf_flags)
continue;
return arches->gdbarch;
}
tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct 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;
}
set_gdbarch_short_bit (gdbarch, 16);
set_gdbarch_int_bit (gdbarch, elf_flags & E_M68HC11_I32 ? 32 : 16);
set_gdbarch_float_bit (gdbarch, 32);
set_gdbarch_double_bit (gdbarch, elf_flags & E_M68HC11_F64 ? 64 : 32);
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);
set_gdbarch_char_signed (gdbarch, 0);
set_gdbarch_unwind_pc (gdbarch, m68hc11_unwind_pc);
set_gdbarch_unwind_sp (gdbarch, m68hc11_unwind_sp);
set_gdbarch_fp0_regnum (gdbarch, -1);
set_gdbarch_write_pc (gdbarch, generic_target_write_pc);
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_from_pc (gdbarch, m68hc11_breakpoint_from_pc);
set_gdbarch_deprecated_stack_align (gdbarch, m68hc11_stack_align);
set_gdbarch_print_insn (gdbarch, gdb_print_insn_m68hc11);
m68hc11_add_reggroups (gdbarch);
set_gdbarch_register_reggroup_p (gdbarch, m68hc11_register_reggroup_p);
set_gdbarch_print_registers_info (gdbarch, m68hc11_print_registers_info);
frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
frame_unwind_append_sniffer (gdbarch, m68hc11_frame_sniffer);
frame_base_set_default (gdbarch, &m68hc11_frame_base);
set_gdbarch_unwind_dummy_id (gdbarch, m68hc11_unwind_dummy_id);
set_gdbarch_unwind_pc (gdbarch, m68hc11_unwind_pc);
set_gdbarch_elf_make_msymbol_special (gdbarch,
m68hc11_elf_make_msymbol_special);
set_gdbarch_believe_pcc_promotion (gdbarch, 1);
return gdbarch;
}
extern initialize_file_ftype _initialize_m68hc11_tdep;
void
_initialize_m68hc11_tdep (void)
{
register_gdbarch_init (bfd_arch_m68hc11, m68hc11_gdbarch_init);
register_gdbarch_init (bfd_arch_m68hc12, m68hc11_gdbarch_init);
m68hc11_init_reggroups ();
}