-/* Target-machine dependent code for Hitachi H8/500, for GDB.
- Copyright (C) 1993 Free Software Foundation, Inc.
+/* Target-dependent code for Hitachi H8/500, for GDB.
-This file is part of GDB.
+ Copyright 1993, 1994, 1995, 1998, 2000, 2001, 2002 Free Software
+ Foundation, Inc.
-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 2 of the License, or
-(at your option) any later version.
+ This file is part of GDB.
-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.
+ 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 2 of the License, or
+ (at your option) any later version.
-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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ 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, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
/*
- Contributed by Steve Chamberlain
- sac@cygnus.com
+ Contributed by Steve Chamberlain
+ sac@cygnus.com
*/
#include "defs.h"
#include "frame.h"
-#include "obstack.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "gdbcmd.h"
#include "value.h"
#include "dis-asm.h"
-#include "../opcodes/h8500-opc.h"
-;
+#include "gdbcore.h"
+#include "regcache.h"
#define UNSIGNED_SHORT(X) ((X) & 0xffff)
-/* Shape of an H8/500 frame :
+static int code_size = 2;
+static int data_size = 2;
+
+/* Shape of an H8/500 frame :
arg-n
..
arg-2
arg-1
return address <2 or 4 bytes>
- old fp <2 bytes>
+ old fp <2 bytes>
auto-n
..
auto-1
saved registers
-*/
-
+ */
/* an easy to debug H8 stack frame looks like:
-0x6df6 push r6
-0x0d76 mov.w r7,r6
-0x6dfn push reg
-0x7905 nnnn mov.w #n,r5 or 0x1b87 subs #2,sp
-0x1957 sub.w r5,sp
+ 0x6df6 push r6
+ 0x0d76 mov.w r7,r6
+ 0x6dfn push reg
+ 0x7905 nnnn mov.w #n,r5 or 0x1b87 subs #2,sp
+ 0x1957 sub.w r5,sp
*/
#define LINK_16 0x1f
int minimum_mode = 1;
-CORE_ADDR examine_prologue ();
-
-void frame_find_saved_regs ();
-
CORE_ADDR
-h8500_skip_prologue (start_pc)
- CORE_ADDR start_pc;
-
+h8500_skip_prologue (CORE_ADDR start_pc)
{
short int w;
- w = read_memory_integer (start_pc, 1);
+ w = read_memory_integer (start_pc, 1);
if (w == LINK_8)
{
start_pc += 2;
return start_pc;
}
-int
-print_insn (memaddr, stream)
- CORE_ADDR memaddr;
- GDB_FILE *stream;
+CORE_ADDR
+h8500_addr_bits_remove (CORE_ADDR addr)
{
- disassemble_info info;
- GDB_INIT_DISASSEMBLE_INFO (info, stream);
- return print_insn_h8500 (memaddr, &info);
+ return ((addr) & 0xffffff);
}
/* Given a GDB frame, determine the address of the calling function's frame.
For us, the frame address is its stack pointer value, so we look up
the function prologue to determine the caller's sp value, and return it. */
-FRAME_ADDR
-h8500_frame_chain (thisframe)
- FRAME thisframe;
+CORE_ADDR
+h8500_frame_chain (struct frame_info *thisframe)
{
if (!inside_entry_file (thisframe->pc))
return (read_memory_integer (FRAME_FP (thisframe), PTR_SIZE));
return 0;
}
-
/* Fetch the instruction at ADDR, returning 0 if ADDR is beyond LIM or
is not the address of a valid instruction, the address of the next
instruction beyond ADDR otherwise. *PWORD1 receives the first word
- of the instruction.*/
+ of the instruction. */
CORE_ADDR
-NEXT_PROLOGUE_INSN (addr, lim, pword1)
- CORE_ADDR addr;
- CORE_ADDR lim;
- char *pword1;
+NEXT_PROLOGUE_INSN (CORE_ADDR addr, CORE_ADDR lim, char *pword1)
{
if (addr < lim + 8)
{
return 0;
}
-/* Examine the prologue of a function. `ip' points to the first instruction.
- `limit' is the limit of the prologue (e.g. the addr of the first
- linenumber, or perhaps the program counter if we're stepping through).
- `frame_sp' is the stack pointer value in use in this frame.
- `fsr' is a pointer to a frame_saved_regs structure into which we put
- info about the registers saved by this frame.
- `fi' is a struct frame_info pointer; we fill in various fields in it
- to reflect the offsets of the arg pointer and the locals pointer. */
-
+/* Examine the prologue of a function. `ip' points to the first
+ instruction. `limit' is the limit of the prologue (e.g. the addr
+ of the first linenumber, or perhaps the program counter if we're
+ stepping through). `frame_sp' is the stack pointer value in use in
+ this frame. `fsr' is a pointer to a frame_saved_regs structure
+ into which we put info about the registers saved by this frame.
+ `fi' is a struct frame_info pointer; we fill in various fields in
+ it to reflect the offsets of the arg pointer and the locals
+ pointer. */
/* Return the saved PC from this frame. */
CORE_ADDR
-frame_saved_pc (frame)
- FRAME frame;
-{
- return read_memory_integer ((frame)->frame + 2, PTR_SIZE);
-}
-
-CORE_ADDR
-frame_locals_address (fi)
- struct frame_info *fi;
-{
- return fi->frame;
-}
-
-/* Return the address of the argument block for the frame
- described by FI. Returns 0 if the address is unknown. */
-
-CORE_ADDR
-frame_args_address (fi)
- struct frame_info *fi;
+frame_saved_pc (struct frame_info *frame)
{
- return fi->frame;
+ return read_memory_integer (FRAME_FP (frame) + 2, PTR_SIZE);
}
void
-h8300_pop_frame ()
+h8500_pop_frame (void)
{
unsigned regnum;
struct frame_saved_regs fsr;
- struct frame_info *fi;
-
- FRAME frame = get_current_frame ();
+ struct frame_info *frame = get_current_frame ();
- fi = get_frame_info (frame);
- get_frame_saved_regs (fi, &fsr);
+ get_frame_saved_regs (frame, &fsr);
for (regnum = 0; regnum < 8; regnum++)
{
if (fsr.regs[regnum])
- {
- write_register (regnum, read_memory_short (fsr.regs[regnum]));
- }
+ write_register (regnum, read_memory_short (fsr.regs[regnum]));
flush_cached_frames ();
- set_current_frame (create_new_frame (read_register (FP_REGNUM),
- read_pc ()));
-
}
-
}
void
-print_register_hook (regno)
+print_register_hook (int regno)
{
if (regno == CCR_REGNUM)
{
unsigned char b[2];
unsigned char l;
- read_relative_register_raw_bytes (regno, b);
+ frame_register_read (selected_frame, regno, b);
l = b[1];
printf_unfiltered ("\t");
printf_unfiltered ("I-%d - ", (l & 0x80) != 0);
}
int
-h8500_register_size (regno)
- int regno;
+h8500_register_size (int regno)
{
- switch (regno) {
- case SEG_C_REGNUM:
- case SEG_D_REGNUM:
- case SEG_E_REGNUM:
- case SEG_T_REGNUM:
- return 1;
- case R0_REGNUM:
- case R1_REGNUM:
- case R2_REGNUM:
- case R3_REGNUM:
- case R4_REGNUM:
- case R5_REGNUM:
- case R6_REGNUM:
- case R7_REGNUM:
- case CCR_REGNUM:
- return 2;
-
- case PR0_REGNUM:
- case PR1_REGNUM:
- case PR2_REGNUM:
- case PR3_REGNUM:
- case PR4_REGNUM:
- case PR5_REGNUM:
- case PR6_REGNUM:
- case PR7_REGNUM:
- case PC_REGNUM:
- return 4;
- }
+ switch (regno)
+ {
+ case SEG_C_REGNUM:
+ case SEG_D_REGNUM:
+ case SEG_E_REGNUM:
+ case SEG_T_REGNUM:
+ return 1;
+ case R0_REGNUM:
+ case R1_REGNUM:
+ case R2_REGNUM:
+ case R3_REGNUM:
+ case R4_REGNUM:
+ case R5_REGNUM:
+ case R6_REGNUM:
+ case R7_REGNUM:
+ case CCR_REGNUM:
+ return 2;
+
+ case PR0_REGNUM:
+ case PR1_REGNUM:
+ case PR2_REGNUM:
+ case PR3_REGNUM:
+ case PR4_REGNUM:
+ case PR5_REGNUM:
+ case PR6_REGNUM:
+ case PR7_REGNUM:
+ case PC_REGNUM:
+ return 4;
+ default:
+ internal_error (__FILE__, __LINE__, "failed internal consistency check");
+ }
}
struct type *
-h8500_register_virtual_type (regno)
- int regno;
+h8500_register_virtual_type (int regno)
{
switch (regno)
{
case PC_REGNUM:
return builtin_type_unsigned_long;
default:
- abort ();
+ internal_error (__FILE__, __LINE__, "failed internal consistency check");
}
}
the address we return for it IS the sp for the next frame. */
void
-frame_find_saved_regs (frame_info, frame_saved_regs)
- struct frame_info *frame_info;
- struct frame_saved_regs *frame_saved_regs;
-
+frame_find_saved_regs (struct frame_info *frame_info,
+ struct frame_saved_regs *frame_saved_regs)
{
register int regnum;
register int regmask;
{
pc = get_pc_function_start ((frame_info)->pc);
/* Verify we have a link a6 instruction next;
- if not we lose. If we win, find the address above the saved
- regs using the amount of storage from the link instruction.
- */
+ if not we lose. If we win, find the address above the saved
+ regs using the amount of storage from the link instruction.
+ */
thebyte = read_memory_integer (pc, 1);
if (0x1f == thebyte)
(frame_saved_regs)->regs[PC_REGNUM] = (frame_info)->frame + 2;
}
-saved_pc_after_call (frame)
+CORE_ADDR
+saved_pc_after_call (void)
{
int x;
int a = read_register (SP_REGNUM);
- x = read_memory_integer (a, PTR_SIZE);
- return x;
-}
-
-/* Nonzero if instruction at PC is a return instruction. */
-
-about_to_return (pc)
-{
- int b1 = read_memory_integer (pc, 1);
-
- switch (b1)
+ x = read_memory_integer (a, code_size);
+ if (code_size == 2)
{
- case 0x14: /* rtd #8 */
- case 0x1c: /* rtd #16 */
- case 0x19: /* rts */
- case 0x1a: /* rte */
- return 1;
- case 0x11:
- {
- int b2 = read_memory_integer (pc + 1, 1);
- switch (b2)
- {
- case 0x18: /* prts */
- case 0x14: /* prtd #8 */
- case 0x16: /* prtd #16 */
- return 1;
- }
- }
+ /* Stick current code segement onto top */
+ x &= 0xffff;
+ x |= read_register (SEG_C_REGNUM) << 16;
}
- return 0;
+ x &= 0xffffff;
+ return x;
}
-
void
-h8500_set_pointer_size (newsize)
- int newsize;
+h8500_set_pointer_size (int newsize)
{
static int oldsize = 0;
}
}
+static void
+big_command (char *arg, int from_tty)
+{
+ h8500_set_pointer_size (32);
+ code_size = 4;
+ data_size = 4;
+}
-struct cmd_list_element *setmemorylist;
-
+static void
+medium_command (char *arg, int from_tty)
+{
+ h8500_set_pointer_size (32);
+ code_size = 4;
+ data_size = 2;
+}
static void
-segmented_command (args, from_tty)
- char *args;
- int from_tty;
+compact_command (char *arg, int from_tty)
{
h8500_set_pointer_size (32);
+ code_size = 2;
+ data_size = 4;
}
static void
-unsegmented_command (args, from_tty)
- char *args;
- int from_tty;
+small_command (char *arg, int from_tty)
{
h8500_set_pointer_size (16);
+ code_size = 2;
+ data_size = 2;
}
+static struct cmd_list_element *setmemorylist;
+
static void
-set_memory (args, from_tty)
- char *args;
- int from_tty;
+set_memory (char *args, int from_tty)
{
printf_unfiltered ("\"set memory\" must be followed by the name of a memory subcommand.\n");
help_list (setmemorylist, "set memory ", -1, gdb_stdout);
/* See if variable name is ppc or pr[0-7] */
int
-h8500_is_trapped_internalvar (name)
- char *name;
+h8500_is_trapped_internalvar (char *name)
{
if (name[0] != 'p')
return 0;
return 0;
}
-value
-h8500_value_of_trapped_internalvar (var)
- struct internalvar *var;
+struct value *
+h8500_value_of_trapped_internalvar (struct internalvar *var)
{
LONGEST regval;
unsigned char regbuf[4];
regval = regbuf[0] << 16;
get_saved_register (regbuf, NULL, NULL, selected_frame, regnum, NULL);
- regval |= regbuf[0] << 8 | regbuf[1]; /* XXX host/target byte order */
+ regval |= regbuf[0] << 8 | regbuf[1]; /* XXX host/target byte order */
- free (var->value); /* Free up old value */
+ xfree (var->value); /* Free up old value */
var->value = value_from_longest (builtin_type_unsigned_long, regval);
release_value (var->value); /* Unchain new value */
}
void
-h8500_set_trapped_internalvar (var, newval, bitpos, bitsize, offset)
- struct internalvar *var;
- int offset, bitpos, bitsize;
- value newval;
+h8500_set_trapped_internalvar (struct internalvar *var, struct value *newval,
+ int bitpos, int bitsize, int offset)
{
char *page_regnum, *regnum;
char expression[100];
struct type *type;
enum type_code newval_type_code;
- type = VALUE_TYPE (newval);
+ type = check_typedef (VALUE_TYPE (newval));
newval_type_code = TYPE_CODE (type);
if ((newval_type_code != TYPE_CODE_INT
&& newval_type_code != TYPE_CODE_PTR)
|| TYPE_LENGTH (type) != sizeof (new_regval))
error ("Illegal type (%s) for assignment to $%s\n",
- TYPE_NAME (type), var->name);
+ TYPE_NAME (VALUE_TYPE (newval)), var->name);
new_regval = *(long *) VALUE_CONTENTS_RAW (newval);
parse_and_eval (expression);
}
-void
-_initialize_h8500_tdep ()
-{
- add_prefix_cmd ("memory", no_class, set_memory,
- "set the memory model", &setmemorylist, "set memory ", 0,
- &setlist);
- add_cmd ("segmented", class_support, segmented_command,
- "Set segmented memory model.", &setmemorylist);
- add_cmd ("unsegmented", class_support, unsegmented_command,
- "Set unsegmented memory model.", &setmemorylist);
-
-}
-
CORE_ADDR
-target_read_sp ()
+h8500_read_sp (void)
{
return read_register (PR7_REGNUM);
}
void
-target_write_sp (v)
- CORE_ADDR v;
+h8500_write_sp (CORE_ADDR v)
{
write_register (PR7_REGNUM, v);
}
CORE_ADDR
-target_read_pc ()
+h8500_read_pc (ptid_t ptid)
{
return read_register (PC_REGNUM);
}
void
-target_write_pc (v)
- CORE_ADDR v;
+h8500_write_pc (CORE_ADDR v, ptid_t ptid)
{
write_register (PC_REGNUM, v);
}
CORE_ADDR
-target_read_fp ()
+h8500_read_fp (void)
{
return read_register (PR6_REGNUM);
}
void
-target_write_fp (v)
- CORE_ADDR v;
+_initialize_h8500_tdep (void)
{
- write_register (PR6_REGNUM, v);
-}
+ tm_print_insn = print_insn_h8500;
+
+ add_prefix_cmd ("memory", no_class, set_memory,
+ "set the memory model", &setmemorylist, "set memory ", 0,
+ &setlist);
+
+ add_cmd ("small", class_support, small_command,
+ "Set small memory model. (16 bit code, 16 bit data)", &setmemorylist);
+
+ add_cmd ("big", class_support, big_command,
+ "Set big memory model. (32 bit code, 32 bit data)", &setmemorylist);
+ add_cmd ("medium", class_support, medium_command,
+ "Set medium memory model. (32 bit code, 16 bit data)", &setmemorylist);
+
+ add_cmd ("compact", class_support, compact_command,
+ "Set compact memory model. (16 bit code, 32 bit data)", &setmemorylist);
+
+}
projects / deliverable / binutils-gdb.git / blobdiff