* remote-z8k.c, z8k-tdep.c: support for the Z8001 and Z8002.
* parse.c (std_regs): Only declare if NO_STD_REGS is defined.
This commit is contained in:
Steve Chamberlain
parent
5cd3dcffba
commit
a332e59322
@ -50,7 +50,12 @@ prefixify_subexp PARAMS ((struct expression *, struct expression *, int, int));
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/* Assign machine-independent names to certain registers
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(unless overridden by the REGISTER_NAMES table) */
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#ifdef NO_STD_REGS
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unsigned num_std_regs = 0;
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struct std_regs std_regs[1];
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#else
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struct std_regs std_regs[] = {
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#ifdef PC_REGNUM
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{ "pc", PC_REGNUM },
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#endif
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@ -63,10 +68,13 @@ struct std_regs std_regs[] = {
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#ifdef PS_REGNUM
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{ "ps", PS_REGNUM },
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#endif
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};
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unsigned num_std_regs = (sizeof std_regs / sizeof std_regs[0]);
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#endif
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/* Begin counting arguments for a function call,
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saving the data about any containing call. */
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445
gdb/remote-z8k.c
Normal file
445
gdb/remote-z8k.c
Normal file
@ -0,0 +1,445 @@
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/* Remote debugging interface for Zilog Z8000 simulator
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Copyright 1992 Free Software Foundation, Inc.
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Contributed by Cygnus Support. Written by Steve Chamberlain
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(sac@cygnus.com).
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include "inferior.h"
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#include "wait.h"
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#include "value.h"
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#include <string.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <setjmp.h>
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#include <errno.h>
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#include "terminal.h"
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#include "target.h"
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#include "gdbcore.h"
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#include "../z8ksim/sim.h"
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/* External data declarations */
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extern int stop_soon_quietly; /* for wait_for_inferior */
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/* Forward data declarations */
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extern struct target_ops sim_ops; /* Forward declaration */
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/* Forward function declarations */
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static void sim_fetch_registers ();
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static void sim_close ();
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void sim_store_register();
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void sim_set_oc();
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int
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sim_write_inferior_memory (memaddr, myaddr, len)
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CORE_ADDR memaddr;
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unsigned char *myaddr;
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int len;
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{
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return sim_write(memaddr, myaddr, len);
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}
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static int
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store_register(regno)
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int regno;
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{
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if (regno == -1)
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{
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for (regno = 0; regno < 16; regno++)
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store_register(regno);
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}
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else
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{
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sim_store_register(regno,read_register(regno));
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}
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return 0;
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}
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void
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sim_kill(arg,from_tty)
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char *arg;
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int from_tty;
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{
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}
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/*
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* Download a file specified in 'args', to the sim.
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*/
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static void
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sim_load(args,fromtty)
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char *args;
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int fromtty;
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{
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bfd *abfd;
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asection *s;
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inferior_pid = 0;
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abfd = bfd_openr(args,"coff-z8k");
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if (!abfd)
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{
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printf_filtered("Unable to open file %s\n", args);
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return;
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}
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if (bfd_check_format(abfd, bfd_object) ==0)
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{
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printf_filtered("File is not an object file\n");
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return ;
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}
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s = abfd->sections;
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while (s != (asection *)NULL)
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{
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if (s->flags & SEC_LOAD)
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{
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int i;
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int delta = 4096;
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char *buffer = xmalloc(delta);
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printf_filtered("%s\t: 0x%4x .. 0x%4x ",
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s->name, s->vma, s->vma + s->_raw_size);
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for (i = 0; i < s->_raw_size; i+= delta)
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{
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int sub_delta = delta;
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if (sub_delta > s->_raw_size - i)
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sub_delta = s->_raw_size - i ;
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bfd_get_section_contents(abfd, s, buffer, i, sub_delta);
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sim_write_inferior_memory(s->vma + i, buffer, sub_delta);
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printf_filtered("*");
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fflush(stdout);
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}
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printf_filtered( "\n");
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free(buffer);
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}
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s = s->next;
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}
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sim_set_pc(abfd->start_address);
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}
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/* This is called not only when we first attach, but also when the
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user types "run" after having attached. */
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void
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sim_create_inferior (execfile, args, env)
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char *execfile;
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char *args;
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char **env;
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{
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int entry_pt;
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char buffer[100];
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if (args && *args)
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error ("Can't pass arguments to remote sim process.");
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if (execfile == 0 || exec_bfd == 0)
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error ("No exec file specified");
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entry_pt = (int) bfd_get_start_address (exec_bfd);
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sim_kill(NULL,NULL);
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sim_clear_breakpoints();
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init_wait_for_inferior ();
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insert_breakpoints (); /* Needed to get correct instruction in cache */
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proceed(entry_pt, -1, 0);
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}
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static void
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sim_open (name, from_tty)
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char *name;
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int from_tty;
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{
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if(name == 0)
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{
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name = "";
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}
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/* Clear any break points */
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sim_clear_breakpoints();
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push_target (&sim_ops);
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target_fetch_registers(-1);
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printf_filtered("Connected to the Z8000 Simulator.\n");
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}
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/* Close out all files and local state before this target loses control. */
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static void
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sim_close (quitting)
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int quitting;
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{
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/* Clear any break points */
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sim_clear_breakpoints();
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/* Put this port back into REMOTE mode */
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sleep(1); /* Let any output make it all the way back */
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}
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/* Terminate the open connection to the remote debugger.
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Use this when you want to detach and do something else
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with your gdb. */
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int
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sim_detach (args,from_tty)
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char *args;
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int from_tty;
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{
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sim_clear_breakpoints();
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pop_target(); /* calls sim_close to do the real work */
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if (from_tty)
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printf_filtered ("Ending remote %s debugging\n", target_shortname);
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return 0;
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}
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/* Tell the remote machine to resume. */
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/* Wait until the remote machine stops, then return,
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storing status in STATUS just as `wait' would. */
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int
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sim_wait (status)
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WAITTYPE *status;
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{
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*status = sim_stop_signal();
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return 0;
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}
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/* Return the name of register number REGNO
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in the form input and output by sim.
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Returns a pointer to a static buffer containing the answer. */
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static char *
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get_reg_name (regno)
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int regno;
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{
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static char *rn[NUM_REGS]= REGISTER_NAMES;
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return rn[regno];
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}
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/* Get ready to modify the registers array. On machines which store
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individual registers, this doesn't need to do anything. On machines
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which store all the registers in one fell swoop, this makes sure
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that registers contains all the registers from the program being
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debugged. */
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void
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sim_prepare_to_store ()
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{
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/* Do nothing, since we can store individual regs */
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}
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static CORE_ADDR
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translate_addr(addr)
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CORE_ADDR addr;
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{
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return(addr);
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}
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/* Read a word from remote address ADDR and return it.
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* This goes through the data cache.
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*/
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int
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sim_fetch_word (addr)
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CORE_ADDR addr;
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{
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/* return dcache_fetch (addr);*/
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}
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static void
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fetch_register(regno)
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int regno;
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{
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if (regno == -1)
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{
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for (regno = 0; regno < 16; regno++)
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fetch_register(regno);
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}
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else {
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char buf[MAX_REGISTER_RAW_SIZE];
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sim_fetch_register(regno, buf);
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supply_register(regno, buf);
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}
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}
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/* Write a word WORD into remote address ADDR.
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This goes through the data cache. */
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void
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sim_store_word (addr, word)
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CORE_ADDR addr;
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int word;
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{
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/* dcache_poke (addr, word);*/
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}
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int
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sim_xfer_inferior_memory(memaddr, myaddr, len, write, target)
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CORE_ADDR memaddr;
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char *myaddr;
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int len;
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int write;
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struct target_ops *target; /* ignored */
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{
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if (write)
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{
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sim_write(memaddr, myaddr, len);
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}
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else
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{
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sim_read(memaddr, myaddr, len);
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}
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return len;
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}
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void
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sim_files_info ()
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{
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char *file = "nothing";
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if (exec_bfd)
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file = bfd_get_filename(exec_bfd);
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if (exec_bfd)
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#ifdef __GO32__
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printf_filtered("\tAttached to DOS asynctsr and running program %s\n",file);
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#else
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printf_filtered("\tAttached to %s at %d baud and running program %s\n",file);
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#endif
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printf_filtered("\ton an H8/300 processor.\n");
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}
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/* This routine is run as a hook, just before the main command loop is
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entered. If gdb is configured for the H8, but has not had its
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target specified yet, this will loop prompting the user to do so.
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*/
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void
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sim_before_main_loop ()
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{
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char ttyname[100];
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char *p, *p2;
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extern FILE *instream;
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extern jmp_buf to_top_level;
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push_target (&sim_ops);
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}
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#define MAX_BREAKS 16
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static int num_brkpts=0;
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static int
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sim_insert_breakpoint(addr, save)
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CORE_ADDR addr;
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char *save; /* Throw away, let sim save instructions */
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{
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abort();
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}
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static int
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sim_remove_breakpoint(addr, save)
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CORE_ADDR addr;
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char *save; /* Throw away, let sim save instructions */
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{
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abort();
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}
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/* Clear the sims notion of what the break points are */
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static int
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sim_mourn()
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{
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sim_clear_breakpoints();
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generic_mourn_inferior ();
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return 0;
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}
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static int rem_resume(a,b)
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{
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sim_resume(a,b);
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return 0;
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}
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/* Define the target subroutine names */
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struct target_ops sim_ops =
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{
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"sim", "Remote SIM monitor",
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"Use the Z8000 simulator",
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sim_open, sim_close,
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0, sim_detach, rem_resume, sim_wait, /* attach */
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fetch_register, store_register,
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sim_prepare_to_store,
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sim_xfer_inferior_memory,
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sim_files_info,
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0, 0, /* Breakpoints */
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0, 0, 0, 0, 0, /* Terminal handling */
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sim_kill, /* FIXME, kill */
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sim_load,
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0, /* lookup_symbol */
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sim_create_inferior, /* create_inferior */
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sim_mourn, /* mourn_inferior FIXME */
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0, /* can_run */
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0, /* notice_signals */
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process_stratum, 0, /* next */
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1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */
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0,0, /* Section pointers */
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OPS_MAGIC, /* Always the last thing */
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};
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||||
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||||
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||||
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||||
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||||
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||||
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||||
/***********************************************************************/
|
||||
|
||||
void
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||||
_initialize_remote_sim ()
|
||||
{
|
||||
extern int sim_z8001_mode;
|
||||
sim_z8001_mode = z8001_mode;
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||||
add_target (&sim_ops);
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||||
}
|
||||
|
||||
|
||||
378
gdb/z8k-tdep.c
Normal file
378
gdb/z8k-tdep.c
Normal file
@ -0,0 +1,378 @@
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||||
/* Target-machine dependent code for Zilog Z8000, for GDB.
|
||||
Copyright (C) 1992 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
|
||||
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||||
|
||||
/*
|
||||
Contributed by Steve Chamberlain
|
||||
sac@cygnus.com
|
||||
*/
|
||||
|
||||
|
||||
#include "defs.h"
|
||||
#include "frame.h"
|
||||
#include "obstack.h"
|
||||
#include "symtab.h"
|
||||
#include "gdbtypes.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)
|
||||
FRAME 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)
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||||
#define IS_PUSH_FP(x) (BIG ? (x == 0x93ea) : (x == 0x93fa))
|
||||
|
||||
|
||||
/* 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;
|
||||
{
|
||||
*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 */
|
||||
}
|
||||
|
||||
/* remember any stack adjustment */
|
||||
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;
|
||||
{
|
||||
int w = read_memory_short(pc);
|
||||
int offset = 0;
|
||||
int regno;
|
||||
|
||||
|
||||
|
||||
for (regno = 0; regno < NUM_REGS; regno++)
|
||||
regs->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;
|
||||
}
|
||||
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;
|
||||
return pc;
|
||||
}
|
||||
|
||||
CORE_ADDR z8k_skip_prologue(start_pc)
|
||||
CORE_ADDR start_pc;
|
||||
{
|
||||
struct frame_saved_regs dummy;
|
||||
return examine_frame(start_pc, &dummy, 0);
|
||||
}
|
||||
|
||||
CORE_ADDR addr_bits_remove(x)
|
||||
CORE_ADDR x;
|
||||
{
|
||||
return x & PTR_MASK;
|
||||
}
|
||||
|
||||
read_memory_pointer(x)
|
||||
CORE_ADDR x;
|
||||
{
|
||||
|
||||
return read_memory_integer(ADDR_BITS_REMOVE(x), BIG ? 4 : 2);
|
||||
}
|
||||
|
||||
FRAME_ADDR
|
||||
frame_chain (thisframe)
|
||||
FRAME 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);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
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. */
|
||||
|
||||
void get_frame_saved_regs(frame_info, frame_saved_regs)
|
||||
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));
|
||||
pc = get_pc_function_start(frame_info->pc);
|
||||
|
||||
/* wander down the instruction stream */
|
||||
examine_frame(pc, frame_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;
|
||||
{
|
||||
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);
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
store_return_value()
|
||||
{
|
||||
abort();
|
||||
}
|
||||
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.*/
|
||||
|
||||
|
||||
CORE_ADDR
|
||||
NEXT_PROLOGUE_INSN(addr, lim, pword1)
|
||||
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;
|
||||
}
|
||||
|
||||
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;
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
fsrp->regs[PC_REGNUM] = fip->frame + 4;
|
||||
fsrp->regs[FP_REGNUM] = fip->frame;
|
||||
|
||||
}
|
||||
|
||||
void
|
||||
addr_bits_set() { abort(); }
|
||||
|
||||
int
|
||||
saved_pc_after_call()
|
||||
{
|
||||
return addr_bits_remove(read_memory_integer(read_register(SP_REGNUM), PTR_SIZE));
|
||||
}
|
||||
|
||||
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]);
|
||||
}
|
||||
|
||||
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));
|
||||
|
||||
printf("\n");
|
||||
for (i = 0; i < 10; i+=2) {
|
||||
printf("(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() { }
|
||||
Loading…
Reference in New Issue
Block a user