/* 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, 2008, 2009
- Free Software Foundation, Inc.
+ Copyright (C) 1990-2019 Free Software Foundation, Inc.
This file is part of GDB.
#include "symtab.h"
#include "gdbcore.h"
#include "value.h"
-#include "gdb_string.h"
-#include "gdb_assert.h"
#include "inferior.h"
#include "regcache.h"
#include "arch-utils.h"
#include "osabi.h"
#include "dis-asm.h"
#include "target-descriptions.h"
+#include "floatformat.h"
+#include "target-float.h"
#include "m68k-tdep.h"
\f
#define P_MOVEL_SP 0x2f00
#define P_MOVEML_SP 0x48e7
-/* Offset from SP to first arg on stack at first instruction of a function */
+/* Offset from SP to first arg on stack at first instruction of a function. */
#define SP_ARG0 (1 * 4)
#if !defined (BPT_VECTOR)
#define BPT_VECTOR 0xf
#endif
-static const gdb_byte *
-m68k_local_breakpoint_from_pc (struct gdbarch *gdbarch,
- CORE_ADDR *pcptr, int *lenptr)
-{
- static gdb_byte break_insn[] = {0x4e, (0x40 | BPT_VECTOR)};
- *lenptr = sizeof (break_insn);
- return break_insn;
-}
+constexpr gdb_byte m68k_break_insn[] = {0x4e, (0x40 | BPT_VECTOR)};
+
+typedef BP_MANIPULATION (m68k_break_insn) m68k_breakpoint;
\f
/* Construct types for ISA-specific registers. */
{
struct type *type;
- type = arch_flags_type (gdbarch, "builtin_type_m68k_ps", 4);
+ type = arch_flags_type (gdbarch, "builtin_type_m68k_ps", 32);
append_flags_type_flag (type, 0, "C");
append_flags_type_flag (type, 1, "V");
append_flags_type_flag (type, 2, "Z");
};
/* Function: m68k_register_name
- Returns the name of the standard m68k register regnum. */
+ Returns the name of the standard m68k register regnum. */
static const char *
m68k_register_name (struct gdbarch *gdbarch, int regnum)
{
if (regnum < 0 || regnum >= ARRAY_SIZE (m68k_register_names))
internal_error (__FILE__, __LINE__,
- _("m68k_register_name: illegal register number %d"), regnum);
+ _("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];
}
needs any special handling. */
static int
-m68k_convert_register_p (struct gdbarch *gdbarch, int regnum, struct type *type)
+m68k_convert_register_p (struct gdbarch *gdbarch,
+ int regnum, struct type *type)
{
if (!gdbarch_tdep (gdbarch)->fpregs_present)
return 0;
return (regnum >= M68K_FP0_REGNUM && regnum <= M68K_FP0_REGNUM + 7
+ /* We only support floating-point values. */
+ && TYPE_CODE (type) == TYPE_CODE_FLT
&& type != register_type (gdbarch, M68K_FP0_REGNUM));
}
/* Read a value of type TYPE from register REGNUM in frame FRAME, and
return its contents in TO. */
-static void
+static int
m68k_register_to_value (struct frame_info *frame, int regnum,
- struct type *type, gdb_byte *to)
+ struct type *type, gdb_byte *to,
+ int *optimizedp, int *unavailablep)
{
+ struct gdbarch *gdbarch = get_frame_arch (frame);
gdb_byte from[M68K_MAX_REGISTER_SIZE];
- struct type *fpreg_type = register_type (get_frame_arch (frame),
- M68K_FP0_REGNUM);
+ struct type *fpreg_type = register_type (gdbarch, M68K_FP0_REGNUM);
- /* We only support floating-point values. */
- if (TYPE_CODE (type) != TYPE_CODE_FLT)
- {
- warning (_("Cannot convert floating-point register value "
- "to non-floating-point type."));
- return;
- }
+ gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLT);
/* Convert to TYPE. */
- get_frame_register (frame, regnum, from);
- convert_typed_floating (from, fpreg_type, to, type);
+ if (!get_frame_register_bytes (frame, regnum, 0,
+ register_size (gdbarch, regnum),
+ from, optimizedp, unavailablep))
+ return 0;
+
+ target_float_convert (from, fpreg_type, to, type);
+ *optimizedp = *unavailablep = 0;
+ return 1;
}
/* Write the contents FROM of a value of type TYPE into register
}
/* Convert from TYPE. */
- convert_typed_floating (from, type, to, fpreg_type);
+ target_float_convert (from, type, to, fpreg_type);
put_frame_register (frame, regnum, to);
}
if (len <= 4)
{
- regcache_raw_read (regcache, M68K_D0_REGNUM, buf);
+ regcache->raw_read (M68K_D0_REGNUM, buf);
memcpy (valbuf, buf + (4 - len), len);
}
else if (len <= 8)
{
- regcache_raw_read (regcache, M68K_D0_REGNUM, buf);
+ regcache->raw_read (M68K_D0_REGNUM, buf);
memcpy (valbuf, buf + (8 - len), len - 4);
- regcache_raw_read (regcache, M68K_D1_REGNUM, valbuf + (len - 4));
+ regcache->raw_read (M68K_D1_REGNUM, valbuf + (len - 4));
}
else
internal_error (__FILE__, __LINE__,
m68k_svr4_extract_return_value (struct type *type, struct regcache *regcache,
gdb_byte *valbuf)
{
- int len = TYPE_LENGTH (type);
gdb_byte buf[M68K_MAX_REGISTER_SIZE];
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
if (tdep->float_return && TYPE_CODE (type) == TYPE_CODE_FLT)
{
struct type *fpreg_type = register_type (gdbarch, M68K_FP0_REGNUM);
- regcache_raw_read (regcache, M68K_FP0_REGNUM, buf);
- convert_typed_floating (buf, fpreg_type, valbuf, type);
+ regcache->raw_read (M68K_FP0_REGNUM, buf);
+ target_float_convert (buf, fpreg_type, valbuf, type);
}
- else if (TYPE_CODE (type) == TYPE_CODE_PTR && len == 4)
- regcache_raw_read (regcache, M68K_A0_REGNUM, valbuf);
+ else if (TYPE_CODE (type) == TYPE_CODE_PTR && TYPE_LENGTH (type) == 4)
+ regcache->raw_read (M68K_A0_REGNUM, valbuf);
else
m68k_extract_return_value (type, regcache, valbuf);
}
int len = TYPE_LENGTH (type);
if (len <= 4)
- regcache_raw_write_part (regcache, M68K_D0_REGNUM, 4 - len, len, valbuf);
+ regcache->raw_write_part (M68K_D0_REGNUM, 4 - len, len, valbuf);
else if (len <= 8)
{
- regcache_raw_write_part (regcache, M68K_D0_REGNUM, 8 - len,
- len - 4, valbuf);
- regcache_raw_write (regcache, M68K_D1_REGNUM, valbuf + (len - 4));
+ regcache->raw_write_part (M68K_D0_REGNUM, 8 - len, len - 4, valbuf);
+ regcache->raw_write (M68K_D1_REGNUM, valbuf + (len - 4));
}
else
internal_error (__FILE__, __LINE__,
m68k_svr4_store_return_value (struct type *type, struct regcache *regcache,
const gdb_byte *valbuf)
{
- int len = TYPE_LENGTH (type);
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
if (tdep->float_return && TYPE_CODE (type) == TYPE_CODE_FLT)
{
struct type *fpreg_type = register_type (gdbarch, M68K_FP0_REGNUM);
gdb_byte buf[M68K_MAX_REGISTER_SIZE];
- convert_typed_floating (valbuf, type, buf, fpreg_type);
- regcache_raw_write (regcache, M68K_FP0_REGNUM, buf);
+ target_float_convert (valbuf, type, buf, fpreg_type);
+ regcache->raw_write (M68K_FP0_REGNUM, buf);
}
- else if (TYPE_CODE (type) == TYPE_CODE_PTR && len == 4)
+ else if (TYPE_CODE (type) == TYPE_CODE_PTR && TYPE_LENGTH (type) == 4)
{
- regcache_raw_write (regcache, M68K_A0_REGNUM, valbuf);
- regcache_raw_write (regcache, M68K_D0_REGNUM, valbuf);
+ regcache->raw_write (M68K_A0_REGNUM, valbuf);
+ regcache->raw_write (M68K_D0_REGNUM, valbuf);
}
else
m68k_store_return_value (type, regcache, valbuf);
}
-/* Return non-zero if TYPE, which is assumed to be a structure or
- union type, should be returned in registers for architecture
+/* Return non-zero if TYPE, which is assumed to be a structure, union or
+ complex type, should be returned in registers for architecture
GDBARCH. */
static int
enum type_code code = TYPE_CODE (type);
int len = TYPE_LENGTH (type);
- gdb_assert (code == TYPE_CODE_STRUCT || code == TYPE_CODE_UNION);
+ gdb_assert (code == TYPE_CODE_STRUCT || code == TYPE_CODE_UNION
+ || code == TYPE_CODE_COMPLEX);
if (tdep->struct_return == pcc_struct_return)
return 0;
from WRITEBUF into REGCACHE. */
static enum return_value_convention
-m68k_return_value (struct gdbarch *gdbarch, struct type *func_type,
+m68k_return_value (struct gdbarch *gdbarch, struct value *function,
struct type *type, struct regcache *regcache,
gdb_byte *readbuf, const gdb_byte *writebuf)
{
enum type_code code = TYPE_CODE (type);
/* GCC returns a `long double' in memory too. */
- if (((code == TYPE_CODE_STRUCT || code == TYPE_CODE_UNION)
+ if (((code == TYPE_CODE_STRUCT || code == TYPE_CODE_UNION
+ || code == TYPE_CODE_COMPLEX)
&& !m68k_reg_struct_return_p (gdbarch, type))
|| (code == TYPE_CODE_FLT && TYPE_LENGTH (type) == 12))
{
}
static enum return_value_convention
-m68k_svr4_return_value (struct gdbarch *gdbarch, struct type *func_type,
+m68k_svr4_return_value (struct gdbarch *gdbarch, struct value *function,
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 || code == TYPE_CODE_UNION)
+ if ((code == TYPE_CODE_STRUCT || code == TYPE_CODE_UNION
+ || code == TYPE_CODE_COMPLEX)
&& !m68k_reg_struct_return_p (gdbarch, type))
{
/* The System V ABI says that:
if (code == TYPE_CODE_STRUCT && TYPE_NFIELDS (type) == 1)
{
type = check_typedef (TYPE_FIELD_TYPE (type, 0));
- return m68k_svr4_return_value (gdbarch, func_type, type, regcache,
+ return m68k_svr4_return_value (gdbarch, function, type, regcache,
readbuf, writebuf);
}
static CORE_ADDR
m68k_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,
+ struct value **args, CORE_ADDR sp,
+ function_call_return_method return_method,
CORE_ADDR struct_addr)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
}
/* Store struct value address. */
- if (struct_return)
+ if (return_method == return_method_struct)
{
store_unsigned_integer (buf, 4, byte_order, struct_addr);
- regcache_cooked_write (regcache, tdep->struct_value_regnum, buf);
+ regcache->cooked_write (tdep->struct_value_regnum, buf);
}
/* Store return address. */
/* Finally, update the stack pointer... */
store_unsigned_integer (buf, 4, byte_order, sp);
- regcache_cooked_write (regcache, M68K_SP_REGNUM, buf);
+ regcache->cooked_write (M68K_SP_REGNUM, buf);
/* ...and fake a frame pointer. */
- regcache_cooked_write (regcache, M68K_FP_REGNUM, buf);
+ regcache->cooked_write (M68K_FP_REGNUM, buf);
/* DWARF2/GCC uses the stack address *before* the function call as a
frame's CFA. */
/* pc */
return M68K_PC_REGNUM;
else
- return gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch);
+ return -1;
}
\f
{
struct m68k_frame_cache cache;
CORE_ADDR pc;
- int op;
cache.locals = -1;
pc = m68k_analyze_prologue (gdbarch, start_pc, (CORE_ADDR) -1, &cache);
int i;
if (*this_cache)
- return *this_cache;
+ return (struct m68k_frame_cache *) *this_cache;
cache = m68k_alloc_frame_cache ();
*this_cache = cache;
static const struct frame_unwind m68k_frame_unwind =
{
NORMAL_FRAME,
+ default_frame_unwind_stop_reason,
m68k_frame_this_id,
m68k_frame_prev_register,
NULL,
/* Figure out where the longjmp will land. Slurp the args out of the stack.
We expect the first arg to be a pointer to the jmp_buf structure from which
we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
- This routine returns true on success. */
+ This routine returns true on success. */
static int
m68k_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc)
return 0;
}
- buf = alloca (gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT);
+ buf = (gdb_byte *) alloca (gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT);
sp = get_frame_register_unsigned (frame, gdbarch_sp_regnum (gdbarch));
- if (target_read_memory (sp + SP_ARG0, /* Offset of first arg on stack */
+ if (target_read_memory (sp + SP_ARG0, /* Offset of first arg on stack. */
buf, gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT))
return 0;
}
\f
+/* This is the implementation of gdbarch method
+ return_in_first_hidden_param_p. */
+
+static int
+m68k_return_in_first_hidden_param_p (struct gdbarch *gdbarch,
+ struct type *type)
+{
+ return 0;
+}
+
/* System V Release 4 (SVR4). */
void
/* Function: m68k_gdbarch_init
Initializer function for the m68k gdbarch vector.
- Called by gdbarch. Sets up the gdbarch vector(s) for this target. */
+ Called by gdbarch. Sets up the gdbarch vector(s) for this target. */
static struct gdbarch *
m68k_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
feature = tdesc_find_feature (info.target_desc,
"org.gnu.gdb.m68k.core");
- if (feature != NULL)
- /* Do nothing. */
- ;
if (feature == NULL)
{
/* The mechanism for returning floating values from function
and the type of long double depend on whether we're
- on ColdFire or standard m68k. */
+ on ColdFire or standard m68k. */
if (info.bfd_arch_info && info.bfd_arch_info->mach != 0)
{
break;
}
- tdep = xzalloc (sizeof (struct gdbarch_tdep));
+ if (best_arch != NULL)
+ {
+ if (tdesc_data != NULL)
+ tdesc_data_cleanup (tdesc_data);
+ return best_arch->gdbarch;
+ }
+
+ tdep = XCNEW (struct gdbarch_tdep);
gdbarch = gdbarch_alloc (&info, tdep);
tdep->fpregs_present = has_fp;
tdep->flavour = flavour;
set_gdbarch_long_double_bit (gdbarch, long_double_format[0]->totalsize);
set_gdbarch_skip_prologue (gdbarch, m68k_skip_prologue);
- set_gdbarch_breakpoint_from_pc (gdbarch, m68k_local_breakpoint_from_pc);
+ set_gdbarch_breakpoint_kind_from_pc (gdbarch, m68k_breakpoint::kind_from_pc);
+ set_gdbarch_sw_breakpoint_from_kind (gdbarch, m68k_breakpoint::bp_from_kind);
- /* Stack grows down. */
+ /* Stack grows down. */
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
set_gdbarch_frame_align (gdbarch, m68k_frame_align);
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->float_return = 0;
}
- /* Function call & return */
+ /* Function call & return. */
set_gdbarch_push_dummy_call (gdbarch, m68k_push_dummy_call);
set_gdbarch_return_value (gdbarch, m68k_return_value);
-
-
- /* Disassembler. */
- set_gdbarch_print_insn (gdbarch, print_insn_m68k);
+ set_gdbarch_return_in_first_hidden_param_p (gdbarch,
+ m68k_return_in_first_hidden_param_p);
#if defined JB_PC && defined JB_ELEMENT_SIZE
tdep->jb_pc = JB_PC;
return;
}
-extern initialize_file_ftype _initialize_m68k_tdep; /* -Wmissing-prototypes */
-
void
_initialize_m68k_tdep (void)
{
projects / thirdparty / binutils-gdb.git / blobdiff