binutils-gdb/gdb/z8k-tdep.c

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/* Target-machine dependent code for Zilog Z8000, for GDB.
Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
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 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
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*
Contributed by Steve Chamberlain
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sac@cygnus.com
*/
#include "defs.h"
#include "frame.h"
#include "obstack.h"
#include "symtab.h"
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#include "gdbcmd.h"
#include "gdbtypes.h"
#include "dis-asm.h"
/* 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)
struct frame_info *frame;
{
return read_memory_pointer (frame->frame + (BIG ? 4 : 2));
}
#define IS_PUSHL(x) (BIG ? ((x & 0xfff0) == 0x91e0):((x & 0xfff0) == 0x91F0))
#define IS_PUSHW(x) (BIG ? ((x & 0xfff0) == 0x93e0):((x & 0xfff0)==0x93f0))
#define IS_MOVE_FP(x) (BIG ? x == 0xa1ea : x == 0xa1fa)
#define IS_MOV_SP_FP(x) (BIG ? x == 0x94ea : x == 0x0d76)
#define IS_SUB2_SP(x) (x==0x1b87)
#define IS_MOVK_R5(x) (x==0x7905)
#define IS_SUB_SP(x) ((x & 0xffff) == 0x020f)
#define IS_PUSH_FP(x) (BIG ? (x == 0x93ea) : (x == 0x93fa))
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/* work out how much local space is on the stack and
return the pc pointing to the first push */
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static CORE_ADDR
skip_adjust (pc, size)
CORE_ADDR pc;
int *size;
{
*size = 0;
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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 */
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if (IS_SUB_SP (read_memory_short (pc)))
{
*size += read_memory_short (pc + 2);
pc += 4;
}
return pc;
}
int
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examine_frame (pc, regs, sp)
CORE_ADDR pc;
struct frame_saved_regs *regs;
CORE_ADDR sp;
{
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int w = read_memory_short (pc);
int offset = 0;
int regno;
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for (regno = 0; regno < NUM_REGS; regno++)
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regs->regs[regno] = 0;
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while (IS_PUSHW (w) || IS_PUSHL (w))
{
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/* 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;
}
pc += 2;
w = read_memory_short (pc);
}
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if (IS_MOVE_FP (w))
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{
/* We know the fp */
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}
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else if (IS_SUB_SP (w))
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{
/* Subtracting a value from the sp, so were in a function
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which needs stack space for locals, but has no fp. We fake up
the values as if we had an fp */
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regs->regs[FP_REGNUM] = sp;
}
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else
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{
/* This one didn't have an fp, we'll fake it up */
regs->regs[SP_REGNUM] = sp;
}
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/* stack pointer contains address of next frame */
/* regs->regs[fp_regnum()] = fp;*/
regs->regs[SP_REGNUM] = sp;
return pc;
}
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CORE_ADDR
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z8k_skip_prologue (start_pc)
CORE_ADDR start_pc;
{
struct frame_saved_regs dummy;
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return examine_frame (start_pc, &dummy, 0);
}
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CORE_ADDR
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addr_bits_remove (x)
CORE_ADDR x;
{
return x & PTR_MASK;
}
int
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read_memory_pointer (x)
CORE_ADDR x;
{
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return read_memory_integer (ADDR_BITS_REMOVE (x), BIG ? 4 : 2);
}
CORE_ADDR
frame_chain (thisframe)
struct frame_info *thisframe;
{
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if (thisframe->prev == 0)
{
/* This is the top of the stack, let's get the sp for real */
}
if (!inside_entry_file (thisframe->pc))
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{
return read_memory_pointer (thisframe->frame);
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}
return 0;
}
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init_frame_pc ()
{
abort ();
}
/* 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
ways in the stack frame. sp is even more special:
the address we return for it IS the sp for the next frame. */
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void
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get_frame_saved_regs (frame_info, frame_saved_regs)
struct frame_info *frame_info;
struct frame_saved_regs *frame_saved_regs;
{
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CORE_ADDR pc;
int w;
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memset (frame_saved_regs, '\0', sizeof (*frame_saved_regs));
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pc = get_pc_function_start (frame_info->pc);
/* wander down the instruction stream */
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examine_frame (pc, frame_saved_regs, frame_info->frame);
}
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void
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z8k_push_dummy_frame ()
{
abort ();
}
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int
General cleanup and simplication of disassembler interface. * a29k-pinsn.c, arm-pinsn.c, convex-pinsn.c, gould-pinsn.c, hppa-pinsn.c, i386-pinsn.c, i960-pinsn.c, m68k-pinsn.c, m88k-pinsn.c, mips-pinsn.c, ns32k-pinsn.c, pyr-pinsn.c, rs6000-pinsn.c, sparc-pinsn.c, tahoe-pinsn.c, vax-pinsn.c: Remove. * gould-tdep.c, ns32k-tdep.c, tahoe-tdep.c, vax-tdep.c: New files, had been -pinsn.c files. * Makefile.in (ALLDEPFILES): Remove removed files. (a29k-pinsn.o, arm-pinsn.o, convex-pinsn.o, gould-pinsn.o, hppa-pinsn.o, i386-pinsn.o, i960-pinsn.o, m68k-pinsn.o, m88k-pinsn.o, mips-pinsn.o, ns32k-pinsn.o, pyr-pinsn.o, rs6000-pinsn.o, sparc-pinsn.o, tahoe-pinsn.o, vax-pinsn.o): Remove compile actions. * arm-tdep.o, gould-tdep.o, ns32k-tdep.o, tahoe-tdep.o, vax-tdep.o: Add compile actions. * defs.h (tm_print_insn): New global. * a29k-tdep.c (gdb_print_insn_a29k): New function. (_initialize_a29k_tdep): Rename from _initialize_29k, set tm_print_insn. * alpha-tdep.c (print_insn): Remove. (_initialize_alpha_tdep): Set tm_print_insn. * arm-tdep.c (arm_print_insn): New function, was print_insn in arm-pinsn.c. * convex-tdep.c (convex_print_insn): New function, was print_insn in convex-pinsn.c. * h8300-tdep.c (print_insn): Remove. (gdb_print_insn_h8300): New function. (_initialize_h8300_tdep): New function. * h8500-tdep.c (print_insn): Remove. (_initialize_h8500_tdep): New function. * hppa-tdep.c (_initialize_hppa_tdep): Set tm_print_insn. * i386-tdep.c (_initialize_i386_tdep): New function. * i960-tdep.c (mem, next_insn): New functions, were in i960-pinsn.c. (_initialize_i960_tdep): Set tm_print_insn. * m68k-tdep.c (_initialize_m68k_tdep): New function. * m88k-tdep.c (_initialize_m88k_tdep): New function. * mips-tdep.c (gdb_print_insn_mips): New function. (_initialize_mips_tdep): Set tm_print_insn. * pyr-tdep.c (pyr_print_insn): New function, was print_insn in pyr-pinsn.c. * rs6000-tdep.c (_initialize_rs6000_tdep): New function. * sh-tdep.c (print_insn): Remove. (gdb_print_insn_sh): New function. (_initialize_sh_tdep): Set tm_print_insn. * sparc-tdep.c (_initialize_sparc_tdep): New function. * w65-tdep.c (print_insn): Remove. (_initialize_w65_tdep): New function. * z8k-tdep.c (print_insn): Remove. (gdb_print_insn_z8k): New function. (_initialize_z8k_tdep): Set tm_print_insn. * printcmd.c (print_insn): New function, generic disassembler. * config/*/*.mt (TDEPFILES): Remove refs to *-pinsn.o. * defs.h (query_hook, error_hook): Fix prototypes.
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gdb_print_insn_z8k (memaddr, info)
bfd_vma memaddr;
disassemble_info *info;
{
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if (BIG)
General cleanup and simplication of disassembler interface. * a29k-pinsn.c, arm-pinsn.c, convex-pinsn.c, gould-pinsn.c, hppa-pinsn.c, i386-pinsn.c, i960-pinsn.c, m68k-pinsn.c, m88k-pinsn.c, mips-pinsn.c, ns32k-pinsn.c, pyr-pinsn.c, rs6000-pinsn.c, sparc-pinsn.c, tahoe-pinsn.c, vax-pinsn.c: Remove. * gould-tdep.c, ns32k-tdep.c, tahoe-tdep.c, vax-tdep.c: New files, had been -pinsn.c files. * Makefile.in (ALLDEPFILES): Remove removed files. (a29k-pinsn.o, arm-pinsn.o, convex-pinsn.o, gould-pinsn.o, hppa-pinsn.o, i386-pinsn.o, i960-pinsn.o, m68k-pinsn.o, m88k-pinsn.o, mips-pinsn.o, ns32k-pinsn.o, pyr-pinsn.o, rs6000-pinsn.o, sparc-pinsn.o, tahoe-pinsn.o, vax-pinsn.o): Remove compile actions. * arm-tdep.o, gould-tdep.o, ns32k-tdep.o, tahoe-tdep.o, vax-tdep.o: Add compile actions. * defs.h (tm_print_insn): New global. * a29k-tdep.c (gdb_print_insn_a29k): New function. (_initialize_a29k_tdep): Rename from _initialize_29k, set tm_print_insn. * alpha-tdep.c (print_insn): Remove. (_initialize_alpha_tdep): Set tm_print_insn. * arm-tdep.c (arm_print_insn): New function, was print_insn in arm-pinsn.c. * convex-tdep.c (convex_print_insn): New function, was print_insn in convex-pinsn.c. * h8300-tdep.c (print_insn): Remove. (gdb_print_insn_h8300): New function. (_initialize_h8300_tdep): New function. * h8500-tdep.c (print_insn): Remove. (_initialize_h8500_tdep): New function. * hppa-tdep.c (_initialize_hppa_tdep): Set tm_print_insn. * i386-tdep.c (_initialize_i386_tdep): New function. * i960-tdep.c (mem, next_insn): New functions, were in i960-pinsn.c. (_initialize_i960_tdep): Set tm_print_insn. * m68k-tdep.c (_initialize_m68k_tdep): New function. * m88k-tdep.c (_initialize_m88k_tdep): New function. * mips-tdep.c (gdb_print_insn_mips): New function. (_initialize_mips_tdep): Set tm_print_insn. * pyr-tdep.c (pyr_print_insn): New function, was print_insn in pyr-pinsn.c. * rs6000-tdep.c (_initialize_rs6000_tdep): New function. * sh-tdep.c (print_insn): Remove. (gdb_print_insn_sh): New function. (_initialize_sh_tdep): Set tm_print_insn. * sparc-tdep.c (_initialize_sparc_tdep): New function. * w65-tdep.c (print_insn): Remove. (_initialize_w65_tdep): New function. * z8k-tdep.c (print_insn): Remove. (gdb_print_insn_z8k): New function. (_initialize_z8k_tdep): Set tm_print_insn. * printcmd.c (print_insn): New function, generic disassembler. * config/*/*.mt (TDEPFILES): Remove refs to *-pinsn.o. * defs.h (query_hook, error_hook): Fix prototypes.
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return print_insn_z8001 (memaddr, info);
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else
General cleanup and simplication of disassembler interface. * a29k-pinsn.c, arm-pinsn.c, convex-pinsn.c, gould-pinsn.c, hppa-pinsn.c, i386-pinsn.c, i960-pinsn.c, m68k-pinsn.c, m88k-pinsn.c, mips-pinsn.c, ns32k-pinsn.c, pyr-pinsn.c, rs6000-pinsn.c, sparc-pinsn.c, tahoe-pinsn.c, vax-pinsn.c: Remove. * gould-tdep.c, ns32k-tdep.c, tahoe-tdep.c, vax-tdep.c: New files, had been -pinsn.c files. * Makefile.in (ALLDEPFILES): Remove removed files. (a29k-pinsn.o, arm-pinsn.o, convex-pinsn.o, gould-pinsn.o, hppa-pinsn.o, i386-pinsn.o, i960-pinsn.o, m68k-pinsn.o, m88k-pinsn.o, mips-pinsn.o, ns32k-pinsn.o, pyr-pinsn.o, rs6000-pinsn.o, sparc-pinsn.o, tahoe-pinsn.o, vax-pinsn.o): Remove compile actions. * arm-tdep.o, gould-tdep.o, ns32k-tdep.o, tahoe-tdep.o, vax-tdep.o: Add compile actions. * defs.h (tm_print_insn): New global. * a29k-tdep.c (gdb_print_insn_a29k): New function. (_initialize_a29k_tdep): Rename from _initialize_29k, set tm_print_insn. * alpha-tdep.c (print_insn): Remove. (_initialize_alpha_tdep): Set tm_print_insn. * arm-tdep.c (arm_print_insn): New function, was print_insn in arm-pinsn.c. * convex-tdep.c (convex_print_insn): New function, was print_insn in convex-pinsn.c. * h8300-tdep.c (print_insn): Remove. (gdb_print_insn_h8300): New function. (_initialize_h8300_tdep): New function. * h8500-tdep.c (print_insn): Remove. (_initialize_h8500_tdep): New function. * hppa-tdep.c (_initialize_hppa_tdep): Set tm_print_insn. * i386-tdep.c (_initialize_i386_tdep): New function. * i960-tdep.c (mem, next_insn): New functions, were in i960-pinsn.c. (_initialize_i960_tdep): Set tm_print_insn. * m68k-tdep.c (_initialize_m68k_tdep): New function. * m88k-tdep.c (_initialize_m88k_tdep): New function. * mips-tdep.c (gdb_print_insn_mips): New function. (_initialize_mips_tdep): Set tm_print_insn. * pyr-tdep.c (pyr_print_insn): New function, was print_insn in pyr-pinsn.c. * rs6000-tdep.c (_initialize_rs6000_tdep): New function. * sh-tdep.c (print_insn): Remove. (gdb_print_insn_sh): New function. (_initialize_sh_tdep): Set tm_print_insn. * sparc-tdep.c (_initialize_sparc_tdep): New function. * w65-tdep.c (print_insn): Remove. (_initialize_w65_tdep): New function. * z8k-tdep.c (print_insn): Remove. (gdb_print_insn_z8k): New function. (_initialize_z8k_tdep): Set tm_print_insn. * printcmd.c (print_insn): New function, generic disassembler. * config/*/*.mt (TDEPFILES): Remove refs to *-pinsn.o. * defs.h (query_hook, error_hook): Fix prototypes.
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return print_insn_z8002 (memaddr, info);
}
/* 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.*/
CORE_ADDR
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NEXT_PROLOGUE_INSN (addr, lim, pword1)
CORE_ADDR addr;
CORE_ADDR lim;
short *pword1;
{
char buf[2];
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if (addr < lim + 8)
{
read_memory (addr, buf, 2);
*pword1 = extract_signed_integer (buf, 2);
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return addr + 2;
}
return 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
ways in the stack frame. sp is even more special:
the address we return for it IS the sp for the next frame.
We cache the result of doing this in the frame_cache_obstack, since
it is fairly expensive. */
void
frame_find_saved_regs (fip, fsrp)
struct frame_info *fip;
struct frame_saved_regs *fsrp;
{
int locals;
CORE_ADDR pc;
CORE_ADDR adr;
int i;
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memset (fsrp, 0, sizeof *fsrp);
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pc = skip_adjust (get_pc_function_start (fip->pc), &locals);
{
adr = FRAME_FP (fip) - locals;
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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;
}
int
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saved_pc_after_call ()
{
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return addr_bits_remove
(read_memory_integer (read_register (SP_REGNUM), PTR_SIZE));
}
extract_return_value (type, regbuf, valbuf)
struct type *type;
char *regbuf;
char *valbuf;
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{
int b;
int len = TYPE_LENGTH (type);
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for (b = 0; b < len; b += 2)
{
int todo = len - b;
if (todo > 2)
todo = 2;
memcpy (valbuf + b, regbuf + b, todo);
}
}
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void
write_return_value (type, valbuf)
struct type *type;
char *valbuf;
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{
int reg;
int len;
for (len = 0; len < TYPE_LENGTH (type); len += 2)
write_register_bytes (REGISTER_BYTE (len / 2 + 2), valbuf + len, 2);
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}
void
store_struct_return (addr, sp)
CORE_ADDR addr;
CORE_ADDR sp;
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{
write_register (2, addr);
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}
void
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print_register_hook (regno)
int regno;
{
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if ((regno & 1) == 0 && regno < 16)
{
unsigned short l[2];
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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]);
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}
if ((regno & 3) == 0 && regno < 16)
{
unsigned short l[4];
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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]);
}
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if (regno == 15)
{
unsigned short rval;
int i;
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read_relative_register_raw_bytes (regno, (char *) (&rval));
printf_unfiltered ("\n");
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for (i = 0; i < 10; i += 2)
{
printf_unfiltered ("(sp+%d=%04x)", i, read_memory_short (rval + i));
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}
}
}
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void
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z8k_pop_frame ()
{
}
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struct cmd_list_element *setmemorylist;
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void
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z8k_set_pointer_size (newsize)
int newsize;
{
static int oldsize = 0;
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if (oldsize != newsize)
{
printf_unfiltered ("pointer size set to %d bits\n", newsize);
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oldsize = newsize;
if (newsize == 32)
{
BIG = 1;
}
else
{
BIG = 0;
}
_initialize_gdbtypes ();
}
}
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static void
segmented_command (args, from_tty)
char *args;
int from_tty;
{
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z8k_set_pointer_size (32);
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}
static void
unsegmented_command (args, from_tty)
char *args;
int from_tty;
{
z8k_set_pointer_size (16);
}
static void
set_memory (args, from_tty)
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);
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}
void
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_initialize_z8ktdep ()
{
General cleanup and simplication of disassembler interface. * a29k-pinsn.c, arm-pinsn.c, convex-pinsn.c, gould-pinsn.c, hppa-pinsn.c, i386-pinsn.c, i960-pinsn.c, m68k-pinsn.c, m88k-pinsn.c, mips-pinsn.c, ns32k-pinsn.c, pyr-pinsn.c, rs6000-pinsn.c, sparc-pinsn.c, tahoe-pinsn.c, vax-pinsn.c: Remove. * gould-tdep.c, ns32k-tdep.c, tahoe-tdep.c, vax-tdep.c: New files, had been -pinsn.c files. * Makefile.in (ALLDEPFILES): Remove removed files. (a29k-pinsn.o, arm-pinsn.o, convex-pinsn.o, gould-pinsn.o, hppa-pinsn.o, i386-pinsn.o, i960-pinsn.o, m68k-pinsn.o, m88k-pinsn.o, mips-pinsn.o, ns32k-pinsn.o, pyr-pinsn.o, rs6000-pinsn.o, sparc-pinsn.o, tahoe-pinsn.o, vax-pinsn.o): Remove compile actions. * arm-tdep.o, gould-tdep.o, ns32k-tdep.o, tahoe-tdep.o, vax-tdep.o: Add compile actions. * defs.h (tm_print_insn): New global. * a29k-tdep.c (gdb_print_insn_a29k): New function. (_initialize_a29k_tdep): Rename from _initialize_29k, set tm_print_insn. * alpha-tdep.c (print_insn): Remove. (_initialize_alpha_tdep): Set tm_print_insn. * arm-tdep.c (arm_print_insn): New function, was print_insn in arm-pinsn.c. * convex-tdep.c (convex_print_insn): New function, was print_insn in convex-pinsn.c. * h8300-tdep.c (print_insn): Remove. (gdb_print_insn_h8300): New function. (_initialize_h8300_tdep): New function. * h8500-tdep.c (print_insn): Remove. (_initialize_h8500_tdep): New function. * hppa-tdep.c (_initialize_hppa_tdep): Set tm_print_insn. * i386-tdep.c (_initialize_i386_tdep): New function. * i960-tdep.c (mem, next_insn): New functions, were in i960-pinsn.c. (_initialize_i960_tdep): Set tm_print_insn. * m68k-tdep.c (_initialize_m68k_tdep): New function. * m88k-tdep.c (_initialize_m88k_tdep): New function. * mips-tdep.c (gdb_print_insn_mips): New function. (_initialize_mips_tdep): Set tm_print_insn. * pyr-tdep.c (pyr_print_insn): New function, was print_insn in pyr-pinsn.c. * rs6000-tdep.c (_initialize_rs6000_tdep): New function. * sh-tdep.c (print_insn): Remove. (gdb_print_insn_sh): New function. (_initialize_sh_tdep): Set tm_print_insn. * sparc-tdep.c (_initialize_sparc_tdep): New function. * w65-tdep.c (print_insn): Remove. (_initialize_w65_tdep): New function. * z8k-tdep.c (print_insn): Remove. (gdb_print_insn_z8k): New function. (_initialize_z8k_tdep): Set tm_print_insn. * printcmd.c (print_insn): New function, generic disassembler. * config/*/*.mt (TDEPFILES): Remove refs to *-pinsn.o. * defs.h (query_hook, error_hook): Fix prototypes.
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tm_print_insn = gdb_print_insn_z8k;
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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);
}