/* Target-machine dependent code for Zilog Z8000, for GDB.
- Copyright (C) 1992 Free Software Foundation, Inc.
+ Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001
+ Free Software Foundation, Inc.
-This file is part of GDB.
+ This file is part of GDB.
-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 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 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 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ 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 "gdbcmd.h"
#include "gdbtypes.h"
+#include "dis-asm.h"
+#include "gdbcore.h"
+#include "regcache.h"
+
+#include "value.h" /* For read_register() */
+static int read_memory_pointer (CORE_ADDR x);
+
/* Return the saved PC from this frame.
If the frame has a memory copy of SRP_REGNUM, use that. If not,
just use the register SRP_REGNUM itself. */
CORE_ADDR
-frame_saved_pc (frame)
-FRAME frame;
+z8k_frame_saved_pc (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))
#define IS_SUB_SP(x) ((x & 0xffff) == 0x020f)
#define IS_PUSH_FP(x) (BIG ? (x == 0x93ea) : (x == 0x93fa))
-
-/* work out how much local space is on the stack and
+/* work out how much local space is on the stack and
return the pc pointing to the first push */
-static
-CORE_ADDR
-skip_adjust(pc, size)
-CORE_ADDR pc;
-int *size;
+static CORE_ADDR
+skip_adjust (CORE_ADDR pc, int *size)
{
*size = 0;
- if (IS_PUSH_FP(read_memory_short(pc))
- && IS_MOV_SP_FP(read_memory_short(pc+2)))
- {
- /* This is a function with an explict frame pointer */
- pc += 4;
- *size += 2; /* remember the frame pointer */
- }
+ if (IS_PUSH_FP (read_memory_short (pc))
+ && IS_MOV_SP_FP (read_memory_short (pc + 2)))
+ {
+ /* This is a function with an explict frame pointer */
+ pc += 4;
+ *size += 2; /* remember the frame pointer */
+ }
/* remember any stack adjustment */
- if (IS_SUB_SP(read_memory_short(pc)))
- {
- *size += read_memory_short(pc+2);
- pc += 4;
- }
+ if (IS_SUB_SP (read_memory_short (pc)))
+ {
+ *size += read_memory_short (pc + 2);
+ pc += 4;
+ }
return pc;
}
-
-int
-examine_frame(pc, regs, sp)
-CORE_ADDR pc;
-struct frame_saved_regs *regs;
-CORE_ADDR sp;
+static CORE_ADDR examine_frame (CORE_ADDR, CORE_ADDR * regs, CORE_ADDR);
+static CORE_ADDR
+examine_frame (CORE_ADDR pc, CORE_ADDR *regs, CORE_ADDR sp)
{
- int w = read_memory_short(pc);
- int offset = 0;
- int regno;
+ int w = read_memory_short (pc);
+ int offset = 0;
+ int regno;
+ for (regno = 0; regno < NUM_REGS; regno++)
+ regs[regno] = 0;
+ while (IS_PUSHW (w) || IS_PUSHL (w))
+ {
+ /* 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);
+ }
- for (regno = 0; regno < NUM_REGS; regno++)
- regs->regs[regno] = 0;
+ if (IS_MOVE_FP (w))
+ {
+ /* We know the fp */
- while (IS_PUSHW(w) || IS_PUSHL(w))
- {
- /* work out which register is being pushed to where */
- if (IS_PUSHL(w))
+ }
+ else if (IS_SUB_SP (w))
{
- regs->regs[w & 0xf] = offset;
- regs->regs[(w & 0xf) + 1] = offset +2;
- offset += 4;
+ /* 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[FP_REGNUM] = sp;
}
- else {
- regs->regs[w & 0xf] = offset;
- offset += 2;
+ else
+ {
+ /* This one didn't have an fp, we'll fake it up */
+ regs[SP_REGNUM] = sp;
}
- pc += 2;
- w = read_memory_short(pc);
- }
-
- if (IS_MOVE_FP(w))
- {
- /* We know the fp */
-
- }
- else if (IS_SUB_SP(w))
- {
- /* 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;
- }
- else
- {
- /* This one didn't have an fp, we'll fake it up */
- regs->regs[SP_REGNUM] = sp;
- }
- /* stack pointer contains address of next frame */
-/* regs->regs[fp_regnum()] = fp;*/
- regs->regs[SP_REGNUM] = sp;
+ /* stack pointer contains address of next frame */
+ /* regs[fp_regnum()] = fp; */
+ regs[SP_REGNUM] = sp;
return pc;
}
-CORE_ADDR z8k_skip_prologue(start_pc)
-CORE_ADDR start_pc;
+CORE_ADDR
+z8k_skip_prologue (CORE_ADDR start_pc)
{
- struct frame_saved_regs dummy;
- return examine_frame(start_pc, &dummy, 0);
+ CORE_ADDR dummy[NUM_REGS];
+
+ return examine_frame (start_pc, dummy, 0);
}
-CORE_ADDR addr_bits_remove(x)
-CORE_ADDR x;
+CORE_ADDR
+z8k_addr_bits_remove (CORE_ADDR addr)
{
- return x & PTR_MASK;
+ return (addr & PTR_MASK);
}
-read_memory_pointer(x)
-CORE_ADDR x;
+static int
+read_memory_pointer (CORE_ADDR x)
{
-
-return read_memory_integer(ADDR_BITS_REMOVE(x), BIG ? 4 : 2);
+ return read_memory_integer (ADDR_BITS_REMOVE (x), BIG ? 4 : 2);
}
-FRAME_ADDR
-frame_chain (thisframe)
- FRAME thisframe;
+CORE_ADDR
+z8k_frame_chain (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))
- {
-return read_memory_pointer ((thisframe)->frame);
- }
-
+ if (thisframe->prev == 0)
+ {
+ /* This is the top of the stack, let's get the sp for real */
+ }
+ if (!inside_entry_file (thisframe->pc))
+ {
+ return read_memory_pointer (thisframe->frame);
+ }
return 0;
}
-init_frame_pc() { abort(); }
+void
+init_frame_pc (void)
+{
+ internal_error (__FILE__, __LINE__, "failed internal consistency check");
+}
/* Put here the code to store, into a struct frame_saved_regs,
the addresses of the saved registers of frame described by FRAME_INFO.
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)
- struct frame_info *frame_info;
- struct frame_saved_regs *frame_saved_regs;
-
+void
+z8k_frame_init_saved_regs (struct frame_info *frame_info)
{
-CORE_ADDR pc;
-int w;
-bzero(frame_saved_regs, sizeof(*frame_saved_regs));
-pc = get_pc_function_start(frame_info->pc);
-
-/* wander down the instruction stream */
-examine_frame(pc, frame_saved_regs, frame_info->frame);
+ CORE_ADDR pc;
+ int w;
-}
+ frame_saved_regs_zalloc (frame_info);
+ pc = get_pc_function_start (frame_info->pc);
+ /* wander down the instruction stream */
+ examine_frame (pc, frame_info->saved_regs, frame_info->frame);
-extract_return_value(valtype, regbuf, valbuf)
-struct type *valtype;
-char regbuf[REGISTER_BYTES];
-char *valbuf;
-{
- bcopy(regbuf + REGISTER_BYTE(2), valbuf, TYPE_LENGTH(valtype));
}
-void z8k_push_dummy_frame() { abort(); }
-int print_insn(memaddr, stream)
-CORE_ADDR memaddr;
-FILE *stream;
+void
+z8k_push_dummy_frame (void)
{
- char temp[20];
- read_memory (memaddr, temp, 20);
- if (BIG) {
- return print_insn_z8001(memaddr, temp, stream);
- }
- else {
- return print_insn_z8002(memaddr, temp, stream);
- }
+ internal_error (__FILE__, __LINE__, "failed internal consistency check");
}
-void
-store_return_value()
+int
+gdb_print_insn_z8k (bfd_vma memaddr, disassemble_info *info)
{
-abort();
+ if (BIG)
+ return print_insn_z8001 (memaddr, info);
+ else
+ return print_insn_z8002 (memaddr, info);
}
-void
-store_struct_return() { abort(); }
-
-
/* 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;
-short *pword1;
+NEXT_PROLOGUE_INSN (CORE_ADDR addr, CORE_ADDR lim, short *pword1)
{
- if (addr < lim+8)
- {
- read_memory (addr, pword1, sizeof(*pword1));
- SWAP_TARGET_AND_HOST (pword1, sizeof (short));
- return addr + 2;
- }
+ char buf[2];
+ if (addr < lim + 8)
+ {
+ 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
it is fairly expensive. */
void
-frame_find_saved_regs (fip, fsrp)
- struct frame_info *fip;
- struct frame_saved_regs *fsrp;
+frame_find_saved_regs (struct frame_info *fip, struct frame_saved_regs *fsrp)
{
int locals;
CORE_ADDR pc;
CORE_ADDR adr;
int i;
-
+
memset (fsrp, 0, sizeof *fsrp);
- pc = skip_adjust(get_pc_function_start (fip->pc), &locals);
-
- {
- adr = fip->frame - locals;
- for (i = 0; i < 8; i++)
- {
- int word = read_memory_short(pc);
- pc += 2 ;
- if (IS_PUSHL(word)) {
- fsrp->regs[word & 0xf] = adr;
- fsrp->regs[(word & 0xf) + 1] = adr - 2;
- adr -= 4;
- }
- else if (IS_PUSHW(word)) {
- fsrp->regs[word & 0xf] = adr;
- adr -= 2;
- }
- else
- break;
- }
-
- }
-
+ pc = skip_adjust (get_pc_function_start (fip->pc), &locals);
+
+ {
+ adr = FRAME_FP (fip) - locals;
+ for (i = 0; i < 8; i++)
+ {
+ int word = read_memory_short (pc);
+
+ pc += 2;
+ if (IS_PUSHL (word))
+ {
+ fsrp->regs[word & 0xf] = adr;
+ fsrp->regs[(word & 0xf) + 1] = adr - 2;
+ adr -= 4;
+ }
+ else if (IS_PUSHW (word))
+ {
+ fsrp->regs[word & 0xf] = adr;
+ adr -= 2;
+ }
+ else
+ break;
+ }
+
+ }
+
fsrp->regs[PC_REGNUM] = fip->frame + 4;
fsrp->regs[FP_REGNUM] = fip->frame;
}
+#endif
+
+int
+z8k_saved_pc_after_call (struct frame_info *frame)
+{
+ return ADDR_BITS_REMOVE
+ (read_memory_integer (read_register (SP_REGNUM), PTR_SIZE));
+}
+
void
-addr_bits_set() { abort(); }
+extract_return_value (struct type *type, char *regbuf, char *valbuf)
+{
+ int b;
+ int len = TYPE_LENGTH (type);
-int
-saved_pc_after_call()
-{
- return addr_bits_remove(read_memory_integer(read_register(SP_REGNUM), PTR_SIZE));
+ for (b = 0; b < len; b += 2)
+ {
+ int todo = len - b;
+
+ if (todo > 2)
+ todo = 2;
+ memcpy (valbuf + b, regbuf + b, todo);
+ }
}
void
-print_register_hook(regno)
-int regno;
+write_return_value (struct type *type, char *valbuf)
{
+ int reg;
+ int len;
- 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]);
- }
+ for (len = 0; len < TYPE_LENGTH (type); len += 2)
+ write_register_bytes (REGISTER_BYTE (len / 2 + 2), valbuf + len, 2);
+}
- 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);
-
- printf("\t");
- printf("%04x%04x%04x%04x", l[0],l[1],l[2],l[3]);
- }
- if (regno == 15)
- {
- unsigned short rval;
- int i;
- read_relative_register_raw_bytes(regno, (char *)(&rval));
+void
+store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
+{
+ write_register (2, addr);
+}
+
+
+void
+z8k_print_register_hook (int regno)
+{
+ if ((regno & 1) == 0 && regno < 16)
+ {
+ unsigned short l[2];
- printf("\n");
- for (i = 0; i < 10; i+=2) {
- printf("(sp+%d=%04x)",i, read_memory_short(rval+i));
+ read_relative_register_raw_bytes (regno, (char *) (l + 0));
+ read_relative_register_raw_bytes (regno + 1, (char *) (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, (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_unfiltered ("\t");
+ printf_unfiltered ("%04x%04x%04x%04x", l[0], l[1], l[2], l[3]);
+ }
+ if (regno == 15)
+ {
+ unsigned short rval;
+ int i;
+
+ read_relative_register_raw_bytes (regno, (char *) (&rval));
+
+ printf_unfiltered ("\n");
+ for (i = 0; i < 10; i += 2)
+ {
+ printf_unfiltered ("(sp+%d=%04x)", i,
+ (unsigned int)read_memory_short (rval + i));
+ }
+ }
+
+}
void
-register_convert_to_virtual(regnum, from, to)
-unsigned char *from;
-unsigned char *to;
+z8k_pop_frame (void)
{
- to[0] = from[0];
- to[1] = from[1];
- to[2] = from[2];
- to[3] = from[3];
}
+struct cmd_list_element *setmemorylist;
+
void
-register_convert_to_raw(regnum, to, from)
-char *to;
-char *from;
+z8k_set_pointer_size (int newsize)
{
- to[0] = from[0];
- to[1] = from[1];
- to[2] = from[2];
- to[3] = from[3];
+ static int oldsize = 0;
+
+ if (oldsize != newsize)
+ {
+ printf_unfiltered ("pointer size set to %d bits\n", newsize);
+ oldsize = newsize;
+ if (newsize == 32)
+ {
+ BIG = 1;
+ }
+ else
+ {
+ BIG = 0;
+ }
+ /* FIXME: This code should be using the GDBARCH framework to
+ handle changed type sizes. If this problem is ever fixed
+ (the direct reference to _initialize_gdbtypes() below
+ eliminated) then Makefile.in should be updated so that
+ z8k-tdep.c is again compiled with -Werror. */
+ _initialize_gdbtypes ();
+ }
+}
+
+static void
+segmented_command (char *args, int from_tty)
+{
+ z8k_set_pointer_size (32);
+}
+
+static void
+unsegmented_command (char *args, int from_tty)
+{
+ z8k_set_pointer_size (16);
}
+static void
+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);
+}
+void
+_initialize_z8ktdep (void)
+{
+ tm_print_insn = gdb_print_insn_z8k;
+
+ 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);
-void z8k_pop_frame() { }
+}
projects / binutils-gdb.git / blobdiff