/* Target-dependent code for the Motorola 68000 series.
Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2001,
- 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+ 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+ Free Software Foundation, Inc.
This file is part of GDB.
}
\f
-/* Type for %ps. */
-struct type *m68k_ps_type;
-
/* Construct types for ISA-specific registers. */
-static void
-m68k_init_types (void)
+static struct type *
+m68k_ps_type (struct gdbarch *gdbarch)
{
- struct type *type;
-
- type = init_flags_type ("builtin_type_m68k_ps", 4);
- append_flags_type_flag (type, 0, "C");
- append_flags_type_flag (type, 1, "V");
- append_flags_type_flag (type, 2, "Z");
- append_flags_type_flag (type, 3, "N");
- append_flags_type_flag (type, 4, "X");
- append_flags_type_flag (type, 8, "I0");
- append_flags_type_flag (type, 9, "I1");
- append_flags_type_flag (type, 10, "I2");
- append_flags_type_flag (type, 12, "M");
- append_flags_type_flag (type, 13, "S");
- append_flags_type_flag (type, 14, "T0");
- append_flags_type_flag (type, 15, "T1");
- m68k_ps_type = type;
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ if (!tdep->m68k_ps_type)
+ {
+ struct type *type;
+
+ type = arch_flags_type (gdbarch, "builtin_type_m68k_ps", 4);
+ append_flags_type_flag (type, 0, "C");
+ append_flags_type_flag (type, 1, "V");
+ append_flags_type_flag (type, 2, "Z");
+ append_flags_type_flag (type, 3, "N");
+ append_flags_type_flag (type, 4, "X");
+ append_flags_type_flag (type, 8, "I0");
+ append_flags_type_flag (type, 9, "I1");
+ append_flags_type_flag (type, 10, "I2");
+ append_flags_type_flag (type, 12, "M");
+ append_flags_type_flag (type, 13, "S");
+ append_flags_type_flag (type, 14, "T0");
+ append_flags_type_flag (type, 15, "T1");
+
+ tdep->m68k_ps_type = type;
+ }
+
+ return tdep->m68k_ps_type;
+}
+
+static struct type *
+m68881_ext_type (struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ if (!tdep->m68881_ext_type)
+ tdep->m68881_ext_type
+ = arch_float_type (gdbarch, -1, "builtin_type_m68881_ext",
+ floatformats_m68881_ext);
+
+ return tdep->m68881_ext_type;
}
/* Return the GDB type object for the "standard" data type of data in
if (tdep->flavour == m68k_coldfire_flavour)
return builtin_type (gdbarch)->builtin_double;
else
- return builtin_type_m68881_ext;
+ return m68881_ext_type (gdbarch);
}
if (regnum == M68K_FPI_REGNUM)
- return builtin_type_void_func_ptr;
+ return builtin_type (gdbarch)->builtin_func_ptr;
if (regnum == M68K_FPC_REGNUM || regnum == M68K_FPS_REGNUM)
- return builtin_type_int32;
+ return builtin_type (gdbarch)->builtin_int32;
}
else
{
if (regnum >= M68K_FP0_REGNUM && regnum <= M68K_FPI_REGNUM)
- return builtin_type_int0;
+ return builtin_type (gdbarch)->builtin_int0;
}
if (regnum == gdbarch_pc_regnum (gdbarch))
- return builtin_type_void_func_ptr;
+ return builtin_type (gdbarch)->builtin_func_ptr;
if (regnum >= M68K_A0_REGNUM && regnum <= M68K_A0_REGNUM + 7)
- return builtin_type_void_data_ptr;
+ return builtin_type (gdbarch)->builtin_data_ptr;
if (regnum == M68K_PS_REGNUM)
- return m68k_ps_type;
+ return m68k_ps_type (gdbarch);
- return builtin_type_int32;
+ return builtin_type (gdbarch)->builtin_int32;
}
static const char *m68k_register_names[] = {
if (regnum < 0 || regnum >= ARRAY_SIZE (m68k_register_names))
internal_error (__FILE__, __LINE__,
_("m68k_register_name: illegal register number %d"), regnum);
+ else if (regnum >= M68K_FP0_REGNUM && regnum <= M68K_FPI_REGNUM
+ && gdbarch_tdep (gdbarch)->fpregs_present == 0)
+ return "";
else
return m68k_register_names[regnum];
}
if (!gdbarch_tdep (gdbarch)->fpregs_present)
return 0;
return (regnum >= M68K_FP0_REGNUM && regnum <= M68K_FP0_REGNUM + 7
- && type != builtin_type_m68881_ext);
+ && type != register_type (gdbarch, M68K_FP0_REGNUM));
}
/* Read a value of type TYPE from register REGNUM in frame FRAME, and
from WRITEBUF into REGCACHE. */
static enum return_value_convention
-m68k_return_value (struct gdbarch *gdbarch, struct type *type,
- struct regcache *regcache, gdb_byte *readbuf,
- const gdb_byte *writebuf)
+m68k_return_value (struct gdbarch *gdbarch, struct type *func_type,
+ struct type *type, struct regcache *regcache,
+ gdb_byte *readbuf, const gdb_byte *writebuf)
{
enum type_code code = TYPE_CODE (type);
}
static enum return_value_convention
-m68k_svr4_return_value (struct gdbarch *gdbarch, struct type *type,
- struct regcache *regcache, gdb_byte *readbuf,
- const gdb_byte *writebuf)
+m68k_svr4_return_value (struct gdbarch *gdbarch, struct type *func_type,
+ struct type *type, struct regcache *regcache,
+ gdb_byte *readbuf, const gdb_byte *writebuf)
{
enum type_code code = TYPE_CODE (type);
if (code == TYPE_CODE_STRUCT && TYPE_NFIELDS (type) == 1)
{
type = check_typedef (TYPE_FIELD_TYPE (type, 0));
- return m68k_svr4_return_value (gdbarch, type, regcache,
+ return m68k_svr4_return_value (gdbarch, func_type, type, regcache,
readbuf, writebuf);
}
CORE_ADDR struct_addr)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
gdb_byte buf[4];
int i;
/* Store struct value address. */
if (struct_return)
{
- store_unsigned_integer (buf, 4, struct_addr);
+ store_unsigned_integer (buf, 4, byte_order, struct_addr);
regcache_cooked_write (regcache, tdep->struct_value_regnum, buf);
}
/* Store return address. */
sp -= 4;
- store_unsigned_integer (buf, 4, bp_addr);
+ store_unsigned_integer (buf, 4, byte_order, bp_addr);
write_memory (sp, buf, 4);
/* Finally, update the stack pointer... */
- store_unsigned_integer (buf, 4, sp);
+ store_unsigned_integer (buf, 4, byte_order, sp);
regcache_cooked_write (regcache, M68K_SP_REGNUM, buf);
/* ...and fake a frame pointer. */
Otherwise, return PC. */
static CORE_ADDR
-m68k_analyze_frame_setup (CORE_ADDR pc, CORE_ADDR current_pc,
+m68k_analyze_frame_setup (struct gdbarch *gdbarch,
+ CORE_ADDR pc, CORE_ADDR current_pc,
struct m68k_frame_cache *cache)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int op;
if (pc >= current_pc)
return current_pc;
- op = read_memory_unsigned_integer (pc, 2);
+ op = read_memory_unsigned_integer (pc, 2, byte_order);
if (op == P_LINKW_FP || op == P_LINKL_FP || op == P_PEA_FP)
{
{
/* link.w %fp, #-N */
/* link.w %fp, #0; adda.l #-N, %sp */
- cache->locals = -read_memory_integer (pc + 2, 2);
+ cache->locals = -read_memory_integer (pc + 2, 2, byte_order);
if (pc + 4 < current_pc && cache->locals == 0)
{
- op = read_memory_unsigned_integer (pc + 4, 2);
+ op = read_memory_unsigned_integer (pc + 4, 2, byte_order);
if (op == P_ADDAL_SP)
{
- cache->locals = read_memory_integer (pc + 6, 4);
+ cache->locals = read_memory_integer (pc + 6, 4, byte_order);
return pc + 10;
}
}
else if (op == P_LINKL_FP)
{
/* link.l %fp, #-N */
- cache->locals = -read_memory_integer (pc + 2, 4);
+ cache->locals = -read_memory_integer (pc + 2, 4, byte_order);
return pc + 6;
}
else
if (pc + 2 < current_pc)
{
- op = read_memory_unsigned_integer (pc + 2, 2);
+ op = read_memory_unsigned_integer (pc + 2, 2, byte_order);
if (op == P_MOVEAL_SP_FP)
{
cache->locals = (op & 07000) == 0 ? 8 : (op & 07000) >> 9;
if (pc + 2 < current_pc)
{
- op = read_memory_unsigned_integer (pc + 2, 2);
+ op = read_memory_unsigned_integer (pc + 2, 2, byte_order);
if ((op & 0170777) == P_SUBQW_SP || (op & 0170777) == P_SUBQL_SP)
{
cache->locals += (op & 07000) == 0 ? 8 : (op & 07000) >> 9;
{
/* adda.w #-N,%sp */
/* lea (-N,%sp),%sp */
- cache->locals = -read_memory_integer (pc + 2, 2);
+ cache->locals = -read_memory_integer (pc + 2, 2, byte_order);
return pc + 4;
}
else if (op == P_ADDAL_SP)
{
/* adda.l #-N,%sp */
- cache->locals = -read_memory_integer (pc + 2, 4);
+ cache->locals = -read_memory_integer (pc + 2, 4, byte_order);
return pc + 6;
}
smaller. Otherwise, return PC. */
static CORE_ADDR
-m68k_analyze_register_saves (CORE_ADDR pc, CORE_ADDR current_pc,
+m68k_analyze_register_saves (struct gdbarch *gdbarch, CORE_ADDR pc,
+ CORE_ADDR current_pc,
struct m68k_frame_cache *cache)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+
if (cache->locals >= 0)
{
CORE_ADDR offset;
offset = -4 - cache->locals;
while (pc < current_pc)
{
- op = read_memory_unsigned_integer (pc, 2);
+ op = read_memory_unsigned_integer (pc, 2, byte_order);
if (op == P_FMOVEMX_SP
- && gdbarch_tdep (current_gdbarch)->fpregs_present)
+ && gdbarch_tdep (gdbarch)->fpregs_present)
{
/* fmovem.x REGS,-(%sp) */
- op = read_memory_unsigned_integer (pc + 2, 2);
+ op = read_memory_unsigned_integer (pc + 2, 2, byte_order);
if ((op & 0xff00) == 0xe000)
{
mask = op & 0xff;
else if (op == P_MOVEML_SP)
{
/* movem.l REGS,-(%sp) */
- mask = read_memory_unsigned_integer (pc + 2, 2);
+ mask = read_memory_unsigned_integer (pc + 2, 2, byte_order);
for (i = 0; i < 16; i++, mask >>= 1)
{
if (mask & 1)
*/
static CORE_ADDR
-m68k_analyze_prologue (CORE_ADDR pc, CORE_ADDR current_pc,
- struct m68k_frame_cache *cache)
+m68k_analyze_prologue (struct gdbarch *gdbarch, CORE_ADDR pc,
+ CORE_ADDR current_pc, struct m68k_frame_cache *cache)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
unsigned int op;
- pc = m68k_analyze_frame_setup (pc, current_pc, cache);
- pc = m68k_analyze_register_saves (pc, current_pc, cache);
+ pc = m68k_analyze_frame_setup (gdbarch, pc, current_pc, cache);
+ pc = m68k_analyze_register_saves (gdbarch, pc, current_pc, cache);
if (pc >= current_pc)
return current_pc;
/* Check for GOT setup. */
- op = read_memory_unsigned_integer (pc, 4);
+ op = read_memory_unsigned_integer (pc, 4, byte_order);
if (op == P_LEA_PC_A5)
{
/* lea (%pc,N),%a5 */
- return pc + 6;
+ return pc + 8;
}
return pc;
/* Return PC of first real instruction. */
static CORE_ADDR
-m68k_skip_prologue (CORE_ADDR start_pc)
+m68k_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR start_pc)
{
struct m68k_frame_cache cache;
CORE_ADDR pc;
int op;
cache.locals = -1;
- pc = m68k_analyze_prologue (start_pc, (CORE_ADDR) -1, &cache);
+ pc = m68k_analyze_prologue (gdbarch, start_pc, (CORE_ADDR) -1, &cache);
if (cache.locals < 0)
return start_pc;
return pc;
gdb_byte buf[8];
frame_unwind_register (next_frame, gdbarch_pc_regnum (gdbarch), buf);
- return extract_typed_address (buf, builtin_type_void_func_ptr);
+ return extract_typed_address (buf, builtin_type (gdbarch)->builtin_func_ptr);
}
\f
/* Normal frames. */
static struct m68k_frame_cache *
-m68k_frame_cache (struct frame_info *next_frame, void **this_cache)
+m68k_frame_cache (struct frame_info *this_frame, void **this_cache)
{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
struct m68k_frame_cache *cache;
gdb_byte buf[4];
int i;
They (usually) share their frame pointer with the frame that was
in progress when the signal occurred. */
- frame_unwind_register (next_frame, M68K_FP_REGNUM, buf);
- cache->base = extract_unsigned_integer (buf, 4);
+ get_frame_register (this_frame, M68K_FP_REGNUM, buf);
+ cache->base = extract_unsigned_integer (buf, 4, byte_order);
if (cache->base == 0)
return cache;
/* For normal frames, %pc is stored at 4(%fp). */
cache->saved_regs[M68K_PC_REGNUM] = 4;
- cache->pc = frame_func_unwind (next_frame, NORMAL_FRAME);
+ cache->pc = get_frame_func (this_frame);
if (cache->pc != 0)
- m68k_analyze_prologue (cache->pc, frame_pc_unwind (next_frame), cache);
+ m68k_analyze_prologue (get_frame_arch (this_frame), cache->pc,
+ get_frame_pc (this_frame), cache);
if (cache->locals < 0)
{
frame by looking at the stack pointer. For truly "frameless"
functions this might work too. */
- frame_unwind_register (next_frame, M68K_SP_REGNUM, buf);
- cache->base = extract_unsigned_integer (buf, 4) + cache->sp_offset;
+ get_frame_register (this_frame, M68K_SP_REGNUM, buf);
+ cache->base = extract_unsigned_integer (buf, 4, byte_order)
+ + cache->sp_offset;
}
/* Now that we have the base address for the stack frame we can
}
static void
-m68k_frame_this_id (struct frame_info *next_frame, void **this_cache,
+m68k_frame_this_id (struct frame_info *this_frame, void **this_cache,
struct frame_id *this_id)
{
- struct m68k_frame_cache *cache = m68k_frame_cache (next_frame, this_cache);
+ struct m68k_frame_cache *cache = m68k_frame_cache (this_frame, this_cache);
/* This marks the outermost frame. */
if (cache->base == 0)
*this_id = frame_id_build (cache->base + 8, cache->pc);
}
-static void
-m68k_frame_prev_register (struct frame_info *next_frame, void **this_cache,
- int regnum, int *optimizedp,
- enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, gdb_byte *valuep)
+static struct value *
+m68k_frame_prev_register (struct frame_info *this_frame, void **this_cache,
+ int regnum)
{
- struct m68k_frame_cache *cache = m68k_frame_cache (next_frame, this_cache);
+ struct m68k_frame_cache *cache = m68k_frame_cache (this_frame, this_cache);
gdb_assert (regnum >= 0);
if (regnum == M68K_SP_REGNUM && cache->saved_sp)
- {
- *optimizedp = 0;
- *lvalp = not_lval;
- *addrp = 0;
- *realnump = -1;
- if (valuep)
- {
- /* Store the value. */
- store_unsigned_integer (valuep, 4, cache->saved_sp);
- }
- return;
- }
+ return frame_unwind_got_constant (this_frame, regnum, cache->saved_sp);
if (regnum < M68K_NUM_REGS && cache->saved_regs[regnum] != -1)
- {
- *optimizedp = 0;
- *lvalp = lval_memory;
- *addrp = cache->saved_regs[regnum];
- *realnump = -1;
- if (valuep)
- {
- /* Read the value in from memory. */
- read_memory (*addrp, valuep,
- register_size (get_frame_arch (next_frame), regnum));
- }
- return;
- }
+ return frame_unwind_got_memory (this_frame, regnum,
+ cache->saved_regs[regnum]);
- *optimizedp = 0;
- *lvalp = lval_register;
- *addrp = 0;
- *realnump = regnum;
- if (valuep)
- frame_unwind_register (next_frame, (*realnump), valuep);
+ return frame_unwind_got_register (this_frame, regnum, regnum);
}
static const struct frame_unwind m68k_frame_unwind =
{
NORMAL_FRAME,
m68k_frame_this_id,
- m68k_frame_prev_register
+ m68k_frame_prev_register,
+ NULL,
+ default_frame_sniffer
};
-
-static const struct frame_unwind *
-m68k_frame_sniffer (struct frame_info *next_frame)
-{
- return &m68k_frame_unwind;
-}
\f
static CORE_ADDR
-m68k_frame_base_address (struct frame_info *next_frame, void **this_cache)
+m68k_frame_base_address (struct frame_info *this_frame, void **this_cache)
{
- struct m68k_frame_cache *cache = m68k_frame_cache (next_frame, this_cache);
+ struct m68k_frame_cache *cache = m68k_frame_cache (this_frame, this_cache);
return cache->base;
}
};
static struct frame_id
-m68k_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
+m68k_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
{
- gdb_byte buf[4];
CORE_ADDR fp;
- frame_unwind_register (next_frame, M68K_FP_REGNUM, buf);
- fp = extract_unsigned_integer (buf, 4);
+ fp = get_frame_register_unsigned (this_frame, M68K_FP_REGNUM);
/* See the end of m68k_push_dummy_call. */
- return frame_id_build (fp + 8, frame_pc_unwind (next_frame));
+ return frame_id_build (fp + 8, get_frame_pc (this_frame));
}
\f
gdb_byte *buf;
CORE_ADDR sp, jb_addr;
struct gdbarch *gdbarch = get_frame_arch (frame);
- struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (frame));
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
if (tdep->jb_pc < 0)
{
return 0;
jb_addr = extract_unsigned_integer (buf, gdbarch_ptr_bit (gdbarch)
- / TARGET_CHAR_BIT);
+ / TARGET_CHAR_BIT, byte_order);
if (target_read_memory (jb_addr + tdep->jb_pc * tdep->jb_elt_size, buf,
- gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT))
+ gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT),
+ byte_order)
return 0;
*pc = extract_unsigned_integer (buf, gdbarch_ptr_bit (gdbarch)
- / TARGET_CHAR_BIT);
+ / TARGET_CHAR_BIT, byte_order);
return 1;
}
\f
break;
}
- tdep = xmalloc (sizeof (struct gdbarch_tdep));
+ if (best_arch != NULL)
+ {
+ if (tdesc_data != NULL)
+ tdesc_data_cleanup (tdesc_data);
+ return best_arch->gdbarch;
+ }
+
+ tdep = xzalloc (sizeof (struct gdbarch_tdep));
gdbarch = gdbarch_alloc (&info, tdep);
tdep->fpregs_present = has_fp;
tdep->flavour = flavour;
set_gdbarch_decr_pc_after_break (gdbarch, 2);
set_gdbarch_frame_args_skip (gdbarch, 8);
- set_gdbarch_dwarf_reg_to_regnum (gdbarch, m68k_dwarf_reg_to_regnum);
set_gdbarch_dwarf2_reg_to_regnum (gdbarch, m68k_dwarf_reg_to_regnum);
set_gdbarch_register_type (gdbarch, m68k_register_type);
set_gdbarch_sp_regnum (gdbarch, M68K_SP_REGNUM);
set_gdbarch_pc_regnum (gdbarch, M68K_PC_REGNUM);
set_gdbarch_ps_regnum (gdbarch, M68K_PS_REGNUM);
- set_gdbarch_fp0_regnum (gdbarch, M68K_FP0_REGNUM);
set_gdbarch_convert_register_p (gdbarch, m68k_convert_register_p);
set_gdbarch_register_to_value (gdbarch, m68k_register_to_value);
set_gdbarch_value_to_register (gdbarch, m68k_value_to_register);
tdep->struct_return = reg_struct_return;
/* Frame unwinder. */
- set_gdbarch_unwind_dummy_id (gdbarch, m68k_unwind_dummy_id);
+ set_gdbarch_dummy_id (gdbarch, m68k_dummy_id);
set_gdbarch_unwind_pc (gdbarch, m68k_unwind_pc);
/* Hook in the DWARF CFI frame unwinder. */
- frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
+ dwarf2_append_unwinders (gdbarch);
frame_base_set_default (gdbarch, &m68k_frame_base);
if (tdep->jb_pc >= 0)
set_gdbarch_get_longjmp_target (gdbarch, m68k_get_longjmp_target);
- frame_unwind_append_sniffer (gdbarch, m68k_frame_sniffer);
+ frame_unwind_append_unwinder (gdbarch, &m68k_frame_unwind);
if (tdesc_data)
tdesc_use_registers (gdbarch, info.target_desc, tdesc_data);
_initialize_m68k_tdep (void)
{
gdbarch_register (bfd_arch_m68k, m68k_gdbarch_init, m68k_dump_tdep);
-
- /* Initialize the m68k-specific register types. */
- m68k_init_types ();
}
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