/* Target-dependent code for the Motorola 68000 series.
- Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000,
- 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2001,
+ 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "dwarf2-frame.h"
#include "frame.h"
#include "frame-base.h"
#include "frame-unwind.h"
-#include "floatformat.h"
+#include "gdbtypes.h"
#include "symtab.h"
#include "gdbcore.h"
#include "value.h"
#define P_MOVEL_SP 0x2f00
#define P_MOVEML_SP 0x48e7
-
-#define REGISTER_BYTES_FP (16*4 + 8 + 8*12 + 3*4)
-#define REGISTER_BYTES_NOFP (16*4 + 8)
-
/* Offset from SP to first arg on stack at first instruction of a function */
#define SP_ARG0 (1 * 4)
#define BPT_VECTOR 0xf
#endif
-static const unsigned char *
+static const gdb_byte *
m68k_local_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
{
- static unsigned char break_insn[] = {0x4e, (0x40 | BPT_VECTOR)};
+ static gdb_byte break_insn[] = {0x4e, (0x40 | BPT_VECTOR)};
*lenptr = sizeof (break_insn);
return break_insn;
}
-
-static int
-m68k_register_bytes_ok (long numbytes)
-{
- return ((numbytes == REGISTER_BYTES_FP)
- || (numbytes == REGISTER_BYTES_NOFP));
-}
-
/* Return the GDB type object for the "standard" data type of data in
register N. This should be int for D0-D7, SR, FPCONTROL and
FPSTATUS, long double for FP0-FP7, and void pointer for all others
"fpcontrol", "fpstatus", "fpiaddr", "fpcode", "fpflags"
};
- if (regnum < 0 ||
- regnum >= sizeof (register_names) / sizeof (register_names[0]))
+ if (regnum < 0 || regnum >= ARRAY_SIZE (register_names))
internal_error (__FILE__, __LINE__,
- "m68k_register_name: illegal register number %d", regnum);
+ _("m68k_register_name: illegal register number %d"), regnum);
else
return register_names[regnum];
}
+\f
+/* Return nonzero if a value of type TYPE stored in register REGNUM
+ needs any special handling. */
+
+static int
+m68k_convert_register_p (int regnum, struct type *type)
+{
+ return (regnum >= M68K_FP0_REGNUM && regnum <= M68K_FP0_REGNUM + 7);
+}
+
+/* Read a value of type TYPE from register REGNUM in frame FRAME, and
+ return its contents in TO. */
+
+static void
+m68k_register_to_value (struct frame_info *frame, int regnum,
+ struct type *type, gdb_byte *to)
+{
+ gdb_byte from[M68K_MAX_REGISTER_SIZE];
+
+ /* 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;
+ }
+
+ /* Convert to TYPE. This should be a no-op if TYPE is equivalent to
+ the extended floating-point format used by the FPU. */
+ get_frame_register (frame, regnum, from);
+ convert_typed_floating (from, builtin_type_m68881_ext, to, type);
+}
+
+/* Write the contents FROM of a value of type TYPE into register
+ REGNUM in frame FRAME. */
+
+static void
+m68k_value_to_register (struct frame_info *frame, int regnum,
+ struct type *type, const gdb_byte *from)
+{
+ gdb_byte to[M68K_MAX_REGISTER_SIZE];
+
+ /* We only support floating-point values. */
+ if (TYPE_CODE (type) != TYPE_CODE_FLT)
+ {
+ warning (_("Cannot convert non-floating-point type "
+ "to floating-point register value."));
+ return;
+ }
+
+ /* Convert from TYPE. This should be a no-op if TYPE is equivalent
+ to the extended floating-point format used by the FPU. */
+ convert_typed_floating (from, type, to, builtin_type_m68881_ext);
+ put_frame_register (frame, regnum, to);
+}
+
\f
/* There is a fair number of calling conventions that are in somewhat
wide use. The 68000/08/10 don't support an FPU, not even as a
static void
m68k_extract_return_value (struct type *type, struct regcache *regcache,
- void *valbuf)
+ gdb_byte *valbuf)
{
int len = TYPE_LENGTH (type);
- char buf[M68K_MAX_REGISTER_SIZE];
+ gdb_byte buf[M68K_MAX_REGISTER_SIZE];
if (len <= 4)
{
{
regcache_raw_read (regcache, M68K_D0_REGNUM, buf);
memcpy (valbuf, buf + (8 - len), len - 4);
- regcache_raw_read (regcache, M68K_D1_REGNUM,
- (char *) valbuf + (len - 4));
+ regcache_raw_read (regcache, M68K_D1_REGNUM, valbuf + (len - 4));
}
else
internal_error (__FILE__, __LINE__,
- "Cannot extract return value of %d bytes long.", len);
+ _("Cannot extract return value of %d bytes long."), len);
}
static void
m68k_svr4_extract_return_value (struct type *type, struct regcache *regcache,
- void *valbuf)
+ gdb_byte *valbuf)
{
int len = TYPE_LENGTH (type);
- char buf[M68K_MAX_REGISTER_SIZE];
+ gdb_byte buf[M68K_MAX_REGISTER_SIZE];
if (TYPE_CODE (type) == TYPE_CODE_FLT)
{
static void
m68k_store_return_value (struct type *type, struct regcache *regcache,
- const void *valbuf)
+ const gdb_byte *valbuf)
{
int len = TYPE_LENGTH (type);
{
regcache_raw_write_part (regcache, M68K_D0_REGNUM, 8 - len,
len - 4, valbuf);
- regcache_raw_write (regcache, M68K_D1_REGNUM,
- (char *) valbuf + (len - 4));
+ regcache_raw_write (regcache, M68K_D1_REGNUM, valbuf + (len - 4));
}
else
internal_error (__FILE__, __LINE__,
- "Cannot store return value of %d bytes long.", len);
+ _("Cannot store return value of %d bytes long."), len);
}
static void
m68k_svr4_store_return_value (struct type *type, struct regcache *regcache,
- const void *valbuf)
+ const gdb_byte *valbuf)
{
int len = TYPE_LENGTH (type);
if (TYPE_CODE (type) == TYPE_CODE_FLT)
{
- char buf[M68K_MAX_REGISTER_SIZE];
+ gdb_byte buf[M68K_MAX_REGISTER_SIZE];
convert_typed_floating (valbuf, type, buf, builtin_type_m68881_ext);
regcache_raw_write (regcache, M68K_FP0_REGNUM, buf);
}
static enum return_value_convention
m68k_return_value (struct gdbarch *gdbarch, struct type *type,
- struct regcache *regcache, void *readbuf,
- const void *writebuf)
+ 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)
- && !m68k_reg_struct_return_p (gdbarch, type))
- return RETURN_VALUE_STRUCT_CONVENTION;
+ /* GCC returns a `long double' in memory too. */
+ if (((code == TYPE_CODE_STRUCT || code == TYPE_CODE_UNION)
+ && !m68k_reg_struct_return_p (gdbarch, type))
+ || (code == TYPE_CODE_FLT && TYPE_LENGTH (type) == 12))
+ {
+ /* The default on m68k is to return structures in static memory.
+ Consequently a function must return the address where we can
+ find the return value. */
+
+ if (readbuf)
+ {
+ ULONGEST addr;
- /* GCC returns a `long double' in memory. */
- if (code == TYPE_CODE_FLT && TYPE_LENGTH (type) == 12)
- return RETURN_VALUE_STRUCT_CONVENTION;
+ regcache_raw_read_unsigned (regcache, M68K_D0_REGNUM, &addr);
+ read_memory (addr, readbuf, TYPE_LENGTH (type));
+ }
+
+ return RETURN_VALUE_ABI_RETURNS_ADDRESS;
+ }
if (readbuf)
m68k_extract_return_value (type, regcache, readbuf);
static enum return_value_convention
m68k_svr4_return_value (struct gdbarch *gdbarch, struct type *type,
- struct regcache *regcache, void *readbuf,
- const void *writebuf)
+ 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)
&& !m68k_reg_struct_return_p (gdbarch, type))
- return RETURN_VALUE_STRUCT_CONVENTION;
+ {
+ /* The System V ABI says that:
+
+ "A function returning a structure or union also sets %a0 to
+ the value it finds in %a0. Thus when the caller receives
+ control again, the address of the returned object resides in
+ register %a0."
+
+ So the ABI guarantees that we can always find the return
+ value just after the function has returned. */
+
+ if (readbuf)
+ {
+ ULONGEST addr;
+
+ regcache_raw_read_unsigned (regcache, M68K_A0_REGNUM, &addr);
+ read_memory (addr, readbuf, TYPE_LENGTH (type));
+ }
+
+ return RETURN_VALUE_ABI_RETURNS_ADDRESS;
+ }
/* This special case is for structures consisting of a single
`float' or `double' member. These structures are returned in
}
\f
+/* Always align the frame to a 4-byte boundary. This is required on
+ coldfire and harmless on the rest. */
+
+static CORE_ADDR
+m68k_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp)
+{
+ /* Align the stack to four bytes. */
+ return sp & ~3;
+}
+
static CORE_ADDR
-m68k_push_dummy_call (struct gdbarch *gdbarch, CORE_ADDR func_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,
CORE_ADDR struct_addr)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- char buf[4];
+ gdb_byte buf[4];
int i;
/* Push arguments in reverse order. */
for (i = nargs - 1; i >= 0; i--)
{
- struct type *value_type = VALUE_ENCLOSING_TYPE (args[i]);
+ struct type *value_type = value_enclosing_type (args[i]);
int len = TYPE_LENGTH (value_type);
int container_len = (len + 3) & ~3;
int offset;
else
offset = container_len - len;
sp -= container_len;
- write_memory (sp + offset, VALUE_CONTENTS_ALL (args[i]), len);
+ write_memory (sp + offset, value_contents_all (args[i]), len);
}
/* Store struct value address. */
frame's CFA. */
return sp + 8;
}
+
+/* Convert a dwarf or dwarf2 regnumber to a GDB regnum. */
+
+static int
+m68k_dwarf_reg_to_regnum (int num)
+{
+ if (num < 8)
+ /* d0..7 */
+ return (num - 0) + M68K_D0_REGNUM;
+ else if (num < 16)
+ /* a0..7 */
+ return (num - 8) + M68K_A0_REGNUM;
+ else if (num < 24)
+ /* fp0..7 */
+ return (num - 16) + M68K_FP0_REGNUM;
+ else if (num == 25)
+ /* pc */
+ return M68K_PC_REGNUM;
+ else
+ return gdbarch_num_regs (current_gdbarch)
+ + gdbarch_num_pseudo_regs (current_gdbarch);
+}
+
\f
struct m68k_frame_cache
{
else
break;
}
- else if ((op & 0170677) == P_MOVEL_SP)
+ else if ((op & 0177760) == P_MOVEL_SP)
{
/* move.l %R,-(%sp) */
- regno = ((op & 07000) >> 9) | ((op & 0100) >> 3);
+ regno = op & 017;
cache->saved_regs[regno] = offset;
offset -= 4;
pc += 2;
static CORE_ADDR
m68k_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
{
- char buf[8];
+ gdb_byte buf[8];
frame_unwind_register (next_frame, PC_REGNUM, buf);
return extract_typed_address (buf, builtin_type_void_func_ptr);
m68k_frame_cache (struct frame_info *next_frame, void **this_cache)
{
struct m68k_frame_cache *cache;
- char buf[4];
+ gdb_byte buf[4];
int i;
if (*this_cache)
/* For normal frames, %pc is stored at 4(%fp). */
cache->saved_regs[M68K_PC_REGNUM] = 4;
- cache->pc = frame_func_unwind (next_frame);
+ cache->pc = frame_func_unwind (next_frame, NORMAL_FRAME);
if (cache->pc != 0)
m68k_analyze_prologue (cache->pc, frame_pc_unwind (next_frame), cache);
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, void *valuep)
+ int *realnump, gdb_byte *valuep)
{
struct m68k_frame_cache *cache = m68k_frame_cache (next_frame, this_cache);
return;
}
- frame_register_unwind (next_frame, regnum,
- optimizedp, lvalp, addrp, realnump, valuep);
+ *optimizedp = 0;
+ *lvalp = lval_register;
+ *addrp = 0;
+ *realnump = regnum;
+ if (valuep)
+ frame_unwind_register (next_frame, (*realnump), valuep);
}
static const struct frame_unwind m68k_frame_unwind =
static struct frame_id
m68k_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
{
- char buf[4];
+ gdb_byte buf[4];
CORE_ADDR fp;
frame_unwind_register (next_frame, M68K_FP_REGNUM, buf);
return frame_id_build (fp + 8, frame_pc_unwind (next_frame));
}
\f
-#ifdef USE_PROC_FS /* Target dependent support for /proc */
-
-#include <sys/procfs.h>
-
-/* Prototypes for supply_gregset etc. */
-#include "gregset.h"
-
-/* The /proc interface divides the target machine's register set up into
- two different sets, the general register set (gregset) and the floating
- point register set (fpregset). For each set, there is an ioctl to get
- the current register set and another ioctl to set the current values.
-
- The actual structure passed through the ioctl interface is, of course,
- naturally machine dependent, and is different for each set of registers.
- For the m68k for example, the general register set is typically defined
- by:
-
- typedef int gregset_t[18];
-
- #define R_D0 0
- ...
- #define R_PS 17
-
- and the floating point set by:
-
- typedef struct fpregset {
- int f_pcr;
- int f_psr;
- int f_fpiaddr;
- int f_fpregs[8][3]; (8 regs, 96 bits each)
- } fpregset_t;
-
- These routines provide the packing and unpacking of gregset_t and
- fpregset_t formatted data.
-
- */
-
-/* Atari SVR4 has R_SR but not R_PS */
-
-#if !defined (R_PS) && defined (R_SR)
-#define R_PS R_SR
-#endif
-
-/* Given a pointer to a general register set in /proc format (gregset_t *),
- unpack the register contents and supply them as gdb's idea of the current
- register values. */
-
-void
-supply_gregset (gregset_t *gregsetp)
-{
- int regi;
- greg_t *regp = (greg_t *) gregsetp;
-
- for (regi = 0; regi < R_PC; regi++)
- {
- supply_register (regi, (char *) (regp + regi));
- }
- supply_register (PS_REGNUM, (char *) (regp + R_PS));
- supply_register (PC_REGNUM, (char *) (regp + R_PC));
-}
-
-void
-fill_gregset (gregset_t *gregsetp, int regno)
-{
- int regi;
- greg_t *regp = (greg_t *) gregsetp;
-
- for (regi = 0; regi < R_PC; regi++)
- {
- if (regno == -1 || regno == regi)
- regcache_collect (regi, regp + regi);
- }
- if (regno == -1 || regno == PS_REGNUM)
- regcache_collect (PS_REGNUM, regp + R_PS);
- if (regno == -1 || regno == PC_REGNUM)
- regcache_collect (PC_REGNUM, regp + R_PC);
-}
-
-#if defined (FP0_REGNUM)
-
-/* Given a pointer to a floating point register set in /proc format
- (fpregset_t *), unpack the register contents and supply them as gdb's
- idea of the current floating point register values. */
-
-void
-supply_fpregset (fpregset_t *fpregsetp)
-{
- int regi;
- char *from;
-
- for (regi = FP0_REGNUM; regi < M68K_FPC_REGNUM; regi++)
- {
- from = (char *) &(fpregsetp->f_fpregs[regi - FP0_REGNUM][0]);
- supply_register (regi, from);
- }
- supply_register (M68K_FPC_REGNUM, (char *) &(fpregsetp->f_pcr));
- supply_register (M68K_FPS_REGNUM, (char *) &(fpregsetp->f_psr));
- supply_register (M68K_FPI_REGNUM, (char *) &(fpregsetp->f_fpiaddr));
-}
-
-/* Given a pointer to a floating point register set in /proc format
- (fpregset_t *), update the register specified by REGNO from gdb's idea
- of the current floating point register set. If REGNO is -1, update
- them all. */
-
-void
-fill_fpregset (fpregset_t *fpregsetp, int regno)
-{
- int regi;
-
- for (regi = FP0_REGNUM; regi < M68K_FPC_REGNUM; regi++)
- {
- if (regno == -1 || regno == regi)
- regcache_collect (regi, &fpregsetp->f_fpregs[regi - FP0_REGNUM][0]);
- }
- if (regno == -1 || regno == M68K_FPC_REGNUM)
- regcache_collect (M68K_FPC_REGNUM, &fpregsetp->f_pcr);
- if (regno == -1 || regno == M68K_FPS_REGNUM)
- regcache_collect (M68K_FPS_REGNUM, &fpregsetp->f_psr);
- if (regno == -1 || regno == M68K_FPI_REGNUM)
- regcache_collect (M68K_FPI_REGNUM, &fpregsetp->f_fpiaddr);
-}
-
-#endif /* defined (FP0_REGNUM) */
-
-#endif /* USE_PROC_FS */
/* 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. */
-int
+static int
m68k_get_longjmp_target (CORE_ADDR *pc)
{
- char *buf;
+ gdb_byte *buf;
CORE_ADDR sp, jb_addr;
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
if (tdep->jb_pc < 0)
{
internal_error (__FILE__, __LINE__,
- "m68k_get_longjmp_target: not implemented");
+ _("m68k_get_longjmp_target: not implemented"));
return 0;
}
- buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT);
+ buf = alloca (gdbarch_ptr_bit (current_gdbarch) / TARGET_CHAR_BIT);
sp = read_register (SP_REGNUM);
if (target_read_memory (sp + SP_ARG0, /* Offset of first arg on stack */
- buf, TARGET_PTR_BIT / TARGET_CHAR_BIT))
+ buf,
+ gdbarch_ptr_bit (current_gdbarch) / TARGET_CHAR_BIT))
return 0;
- jb_addr = extract_unsigned_integer (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
+ jb_addr = extract_unsigned_integer (buf, gdbarch_ptr_bit (current_gdbarch)
+ / TARGET_CHAR_BIT);
if (target_read_memory (jb_addr + tdep->jb_pc * tdep->jb_elt_size, buf,
- TARGET_PTR_BIT / TARGET_CHAR_BIT))
+ gdbarch_ptr_bit (current_gdbarch) / TARGET_CHAR_BIT))
return 0;
- *pc = extract_unsigned_integer (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
+ *pc = extract_unsigned_integer (buf, gdbarch_ptr_bit (current_gdbarch)
+ / TARGET_CHAR_BIT);
return 1;
}
\f
tdep = xmalloc (sizeof (struct gdbarch_tdep));
gdbarch = gdbarch_alloc (&info, tdep);
- set_gdbarch_long_double_format (gdbarch, &floatformat_m68881_ext);
+ set_gdbarch_long_double_format (gdbarch, floatformats_m68881_ext);
set_gdbarch_long_double_bit (gdbarch, 96);
set_gdbarch_skip_prologue (gdbarch, m68k_skip_prologue);
/* Stack grows down. */
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
+ set_gdbarch_frame_align (gdbarch, m68k_frame_align);
set_gdbarch_believe_pcc_promotion (gdbarch, 1);
- 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_register_name (gdbarch, m68k_register_name);
- set_gdbarch_num_regs (gdbarch, 29);
- set_gdbarch_register_bytes_ok (gdbarch, m68k_register_bytes_ok);
+ set_gdbarch_num_regs (gdbarch, M68K_NUM_REGS);
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);
set_gdbarch_push_dummy_call (gdbarch, m68k_push_dummy_call);
set_gdbarch_return_value (gdbarch, m68k_return_value);
projects / deliverable / binutils-gdb.git / blobdiff