/* Target-machine dependent code for Zilog Z8000, for GDB.
- Copyright (C) 1992,1993 Free Software Foundation, Inc.
+ Copyright (C) 1992, 1993, 1994 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*
Contributed by Steve Chamberlain
#include "symtab.h"
#include "gdbcmd.h"
#include "gdbtypes.h"
+#include "dis-asm.h"
+#include "gdbcore.h"
+
/* Return the saved PC from this frame.
CORE_ADDR
frame_saved_pc (frame)
- FRAME frame;
+ struct frame_info *frame;
{
- return (read_memory_pointer (frame->frame + (BIG ? 4 : 2)));
+ return read_memory_pointer (frame->frame + (BIG ? 4 : 2));
}
#define IS_PUSHL(x) (BIG ? ((x & 0xfff0) == 0x91e0):((x & 0xfff0) == 0x91F0))
return pc;
}
-int
+static CORE_ADDR examine_frame PARAMS ((CORE_ADDR, CORE_ADDR *regs, CORE_ADDR));
+static CORE_ADDR
examine_frame (pc, regs, sp)
CORE_ADDR pc;
- struct frame_saved_regs *regs;
+ CORE_ADDR *regs;
CORE_ADDR sp;
{
int w = read_memory_short (pc);
int regno;
for (regno = 0; regno < NUM_REGS; regno++)
- regs->regs[regno] = 0;
+ regs[regno] = 0;
while (IS_PUSHW (w) || IS_PUSHL (w))
- {
- /* work out which register is being pushed to where */
- if (IS_PUSHL (w))
- {
- regs->regs[w & 0xf] = offset;
- regs->regs[(w & 0xf) + 1] = offset + 2;
- offset += 4;
- }
- else
{
- regs->regs[w & 0xf] = offset;
- offset += 2;
+ /* work out which register is being pushed to where */
+ if (IS_PUSHL (w))
+ {
+ regs[w & 0xf] = offset;
+ regs[(w & 0xf) + 1] = offset + 2;
+ offset += 4;
+ }
+ else
+ {
+ regs[w & 0xf] = offset;
+ offset += 2;
+ }
+ pc += 2;
+ w = read_memory_short (pc);
}
- pc += 2;
- w = read_memory_short (pc);
- }
if (IS_MOVE_FP (w))
- {
- /* We know the fp */
+ {
+ /* We know the fp */
- }
+ }
else if (IS_SUB_SP (w))
- {
- /* Subtracting a value from the sp, so were in a function
+ {
+ /* Subtracting a value from the sp, so were in a function
which needs stack space for locals, but has no fp. We fake up
the values as if we had an fp */
- regs->regs[FP_REGNUM] = sp;
- }
+ regs[FP_REGNUM] = sp;
+ }
else
- {
- /* This one didn't have an fp, we'll fake it up */
- regs->regs[SP_REGNUM] = sp;
- }
+ {
+ /* This one didn't have an fp, we'll fake it up */
+ regs[SP_REGNUM] = sp;
+ }
/* stack pointer contains address of next frame */
- /* regs->regs[fp_regnum()] = fp;*/
- regs->regs[SP_REGNUM] = sp;
+ /* regs[fp_regnum()] = fp;*/
+ regs[SP_REGNUM] = sp;
return pc;
}
-CORE_ADDR
+CORE_ADDR
z8k_skip_prologue (start_pc)
CORE_ADDR start_pc;
{
- struct frame_saved_regs dummy;
+ CORE_ADDR dummy[NUM_REGS];
- return examine_frame (start_pc, &dummy, 0);
+ return examine_frame (start_pc, dummy, 0);
}
-CORE_ADDR
-addr_bits_remove (x)
- CORE_ADDR x;
+CORE_ADDR
+z8k_addr_bits_remove (addr)
+ CORE_ADDR addr;
{
- return x & PTR_MASK;
+ return (addr & PTR_MASK);
}
+int
read_memory_pointer (x)
CORE_ADDR x;
{
-
return read_memory_integer (ADDR_BITS_REMOVE (x), BIG ? 4 : 2);
}
-FRAME_ADDR
+CORE_ADDR
frame_chain (thisframe)
- FRAME thisframe;
+ struct frame_info *thisframe;
{
if (thisframe->prev == 0)
{
/* This is the top of the stack, let's get the sp for real */
}
- if (!inside_entry_file ((thisframe)->pc))
+ if (!inside_entry_file (thisframe->pc))
{
- return read_memory_pointer ((thisframe)->frame);
+ return read_memory_pointer (thisframe->frame);
}
return 0;
}
+void
init_frame_pc ()
{
abort ();
ways in the stack frame. sp is even more special:
the address we return for it IS the sp for the next frame. */
-void
-get_frame_saved_regs (frame_info, frame_saved_regs)
+void
+z8k_frame_init_saved_regs (frame_info)
struct frame_info *frame_info;
- struct frame_saved_regs *frame_saved_regs;
-
{
CORE_ADDR pc;
int w;
- bzero (frame_saved_regs, sizeof (*frame_saved_regs));
+ frame_saved_regs_zalloc (frame_info);
pc = get_pc_function_start (frame_info->pc);
-/* wander down the instruction stream */
- examine_frame (pc, frame_saved_regs, frame_info->frame);
+ /* wander down the instruction stream */
+ examine_frame (pc, frame_info->saved_regs, frame_info->frame);
}
-void
+void
z8k_push_dummy_frame ()
{
abort ();
}
-int
-print_insn (memaddr, stream)
- CORE_ADDR memaddr;
- FILE *stream;
+int
+gdb_print_insn_z8k (memaddr, info)
+ bfd_vma memaddr;
+ disassemble_info *info;
{
- char temp[20];
-
- read_memory (memaddr, temp, 20);
if (BIG)
- {
- return print_insn_z8001 (memaddr, temp, stream);
- }
+ return print_insn_z8001 (memaddr, info);
else
- {
- return print_insn_z8002 (memaddr, temp, stream);
- }
+ return print_insn_z8002 (memaddr, info);
}
/* Fetch the instruction at ADDR, returning 0 if ADDR is beyond LIM or
CORE_ADDR lim;
short *pword1;
{
+ char buf[2];
if (addr < lim + 8)
{
- read_memory (addr, pword1, sizeof (*pword1));
- SWAP_TARGET_AND_HOST (pword1, sizeof (short));
+ read_memory (addr, buf, 2);
+ *pword1 = extract_signed_integer (buf, 2);
return addr + 2;
}
-
return 0;
-
}
+#if 0
/* Put here the code to store, into a struct frame_saved_regs,
the addresses of the saved registers of frame described by FRAME_INFO.
This includes special registers such as pc and fp saved in special
pc = skip_adjust (get_pc_function_start (fip->pc), &locals);
{
- adr = fip->frame - locals;
+ adr = FRAME_FP (fip) - locals;
for (i = 0; i < 8; i++)
{
int word = read_memory_short (pc);
fsrp->regs[FP_REGNUM] = fip->frame;
}
+#endif
+
+int
+saved_pc_after_call ()
+{
+ return ADDR_BITS_REMOVE
+ (read_memory_integer (read_register (SP_REGNUM), PTR_SIZE));
+}
+
void
-addr_bits_set ()
+extract_return_value (type, regbuf, valbuf)
+ struct type *type;
+ char *regbuf;
+ char *valbuf;
{
- abort ();
+ int b;
+ int len = TYPE_LENGTH (type);
+
+ for (b = 0; b < len; b += 2)
+ {
+ int todo = len - b;
+
+ if (todo > 2)
+ todo = 2;
+ memcpy (valbuf + b, regbuf + b, todo);
+ }
}
-int
-saved_pc_after_call ()
+void
+write_return_value (type, valbuf)
+ struct type *type;
+ char *valbuf;
+{
+ int reg;
+ int len;
+
+ for (len = 0; len < TYPE_LENGTH (type); len += 2)
+ write_register_bytes (REGISTER_BYTE (len / 2 + 2), valbuf + len, 2);
+}
+
+void
+store_struct_return (addr, sp)
+ CORE_ADDR addr;
+ CORE_ADDR sp;
{
- return addr_bits_remove (read_memory_integer (read_register (SP_REGNUM), PTR_SIZE));
+ write_register (2, addr);
}
+
void
print_register_hook (regno)
int regno;
{
-
if ((regno & 1) == 0 && regno < 16)
{
unsigned short l[2];
read_relative_register_raw_bytes (regno, (char *) (l + 0));
read_relative_register_raw_bytes (regno + 1, (char *) (l + 1));
- printf ("\t");
- printf ("%04x%04x", l[0], l[1]);
+ printf_unfiltered ("\t");
+ printf_unfiltered ("%04x%04x", l[0], l[1]);
}
if ((regno & 3) == 0 && regno < 16)
{
unsigned short l[4];
- read_relative_register_raw_bytes (regno, l + 0);
- read_relative_register_raw_bytes (regno + 1, l + 1);
- read_relative_register_raw_bytes (regno + 2, l + 2);
- read_relative_register_raw_bytes (regno + 3, l + 3);
+ read_relative_register_raw_bytes (regno, (char *) (l + 0));
+ read_relative_register_raw_bytes (regno + 1, (char *) (l + 1));
+ read_relative_register_raw_bytes (regno + 2, (char *) (l + 2));
+ read_relative_register_raw_bytes (regno + 3, (char *) (l + 3));
- printf ("\t");
- printf ("%04x%04x%04x%04x", l[0], l[1], l[2], l[3]);
+ printf_unfiltered ("\t");
+ printf_unfiltered ("%04x%04x%04x%04x", l[0], l[1], l[2], l[3]);
}
if (regno == 15)
{
read_relative_register_raw_bytes (regno, (char *) (&rval));
- printf ("\n");
+ printf_unfiltered ("\n");
for (i = 0; i < 10; i += 2)
{
- printf ("(sp+%d=%04x)", i, read_memory_short (rval + i));
+ printf_unfiltered ("(sp+%d=%04x)", i, read_memory_short (rval + i));
}
}
}
void
-register_convert_to_virtual (regnum, from, to)
- unsigned char *from;
- unsigned char *to;
-{
- to[0] = from[0];
- to[1] = from[1];
- to[2] = from[2];
- to[3] = from[3];
-}
-
-void
-register_convert_to_raw (regnum, to, from)
- char *to;
- char *from;
-{
- to[0] = from[0];
- to[1] = from[1];
- to[2] = from[2];
- to[3] = from[3];
-}
-
-void
z8k_pop_frame ()
{
}
struct cmd_list_element *setmemorylist;
-void
+void
z8k_set_pointer_size (newsize)
int newsize;
{
if (oldsize != newsize)
{
- printf ("pointer size set to %d bits\n", newsize);
+ printf_unfiltered ("pointer size set to %d bits\n", newsize);
oldsize = newsize;
if (newsize == 32)
{
char *args;
int from_tty;
{
- z8k_set_pointer_size (16);
+ z8k_set_pointer_size (32);
}
static void
int from_tty;
{
z8k_set_pointer_size (16);
-
}
static void
char *args;
int from_tty;
{
- printf ("\"set memory\" must be followed by the name of a memory subcommand.\n");
- help_list (setmemorylist, "set memory ", -1, stdout);
+ printf_unfiltered ("\"set memory\" must be followed by the name of a memory subcommand.\n");
+ help_list (setmemorylist, "set memory ", -1, gdb_stdout);
}
+void
_initialize_z8ktdep ()
{
+ tm_print_insn = gdb_print_insn_z8k;
+
add_prefix_cmd ("memory", no_class, set_memory,
"set the memory model", &setmemorylist, "set memory ", 0,
&setlist);