--- /dev/null
+/* Remote debugging interface for Zilog Z8000 simulator
+ Copyright 1992 Free Software Foundation, Inc.
+ Contributed by Cygnus Support. Written by Steve Chamberlain
+ (sac@cygnus.com).
+
+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. */
+
+#include "defs.h"
+#include "inferior.h"
+#include "wait.h"
+#include "value.h"
+#include <string.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <setjmp.h>
+#include <errno.h>
+#include "terminal.h"
+#include "target.h"
+#include "gdbcore.h"
+#include "../z8ksim/sim.h"
+
+/* External data declarations */
+extern int stop_soon_quietly; /* for wait_for_inferior */
+
+/* Forward data declarations */
+extern struct target_ops sim_ops; /* Forward declaration */
+
+/* Forward function declarations */
+static void sim_fetch_registers ();
+static void sim_close ();
+
+void sim_store_register();
+
+void sim_set_oc();
+
+
+int
+sim_write_inferior_memory (memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ unsigned char *myaddr;
+ int len;
+{
+return sim_write(memaddr, myaddr, len);
+}
+
+static int
+store_register(regno)
+int regno;
+{
+ if (regno == -1)
+ {
+ for (regno = 0; regno < 16; regno++)
+ store_register(regno);
+ }
+ else
+ {
+ sim_store_register(regno,read_register(regno));
+ }
+ return 0;
+}
+
+
+
+void
+sim_kill(arg,from_tty)
+char *arg;
+int from_tty;
+{
+
+}
+
+
+
+/*
+ * Download a file specified in 'args', to the sim.
+ */
+static void
+sim_load(args,fromtty)
+char *args;
+int fromtty;
+{
+ bfd *abfd;
+ asection *s;
+
+ inferior_pid = 0;
+ abfd = bfd_openr(args,"coff-z8k");
+
+ if (!abfd)
+ {
+ printf_filtered("Unable to open file %s\n", args);
+ return;
+ }
+
+ if (bfd_check_format(abfd, bfd_object) ==0)
+ {
+ printf_filtered("File is not an object file\n");
+ return ;
+ }
+
+ s = abfd->sections;
+ while (s != (asection *)NULL)
+ {
+ if (s->flags & SEC_LOAD)
+ {
+ int i;
+ int delta = 4096;
+ char *buffer = xmalloc(delta);
+ printf_filtered("%s\t: 0x%4x .. 0x%4x ",
+ s->name, s->vma, s->vma + s->_raw_size);
+ for (i = 0; i < s->_raw_size; i+= delta)
+ {
+ int sub_delta = delta;
+ if (sub_delta > s->_raw_size - i)
+ sub_delta = s->_raw_size - i ;
+
+ bfd_get_section_contents(abfd, s, buffer, i, sub_delta);
+ sim_write_inferior_memory(s->vma + i, buffer, sub_delta);
+ printf_filtered("*");
+ fflush(stdout);
+ }
+ printf_filtered( "\n");
+ free(buffer);
+ }
+ s = s->next;
+ }
+
+ sim_set_pc(abfd->start_address);
+}
+
+/* This is called not only when we first attach, but also when the
+ user types "run" after having attached. */
+void
+sim_create_inferior (execfile, args, env)
+ char *execfile;
+ char *args;
+ char **env;
+{
+ int entry_pt;
+ char buffer[100];
+
+ if (args && *args)
+ error ("Can't pass arguments to remote sim process.");
+
+ if (execfile == 0 || exec_bfd == 0)
+ error ("No exec file specified");
+
+ entry_pt = (int) bfd_get_start_address (exec_bfd);
+
+
+
+ sim_kill(NULL,NULL);
+ sim_clear_breakpoints();
+ init_wait_for_inferior ();
+
+
+
+ insert_breakpoints (); /* Needed to get correct instruction in cache */
+ proceed(entry_pt, -1, 0);
+}
+
+
+
+static void
+sim_open (name, from_tty)
+ char *name;
+ int from_tty;
+{
+ if(name == 0)
+ {
+ name = "";
+ }
+
+ /* Clear any break points */
+ sim_clear_breakpoints();
+
+ push_target (&sim_ops);
+ target_fetch_registers(-1);
+
+ printf_filtered("Connected to the Z8000 Simulator.\n");
+}
+
+/* Close out all files and local state before this target loses control. */
+
+static void
+sim_close (quitting)
+ int quitting;
+{
+
+
+ /* Clear any break points */
+ sim_clear_breakpoints();
+
+ /* Put this port back into REMOTE mode */
+ sleep(1); /* Let any output make it all the way back */
+}
+
+/* Terminate the open connection to the remote debugger.
+ Use this when you want to detach and do something else
+ with your gdb. */
+int
+sim_detach (args,from_tty)
+ char *args;
+ int from_tty;
+{
+ sim_clear_breakpoints();
+
+ pop_target(); /* calls sim_close to do the real work */
+ if (from_tty)
+ printf_filtered ("Ending remote %s debugging\n", target_shortname);
+ return 0;
+}
+
+/* Tell the remote machine to resume. */
+
+
+/* Wait until the remote machine stops, then return,
+ storing status in STATUS just as `wait' would. */
+
+int
+sim_wait (status)
+ WAITTYPE *status;
+{
+
+*status = sim_stop_signal();
+return 0;
+}
+
+/* Return the name of register number REGNO
+ in the form input and output by sim.
+
+ Returns a pointer to a static buffer containing the answer. */
+static char *
+get_reg_name (regno)
+ int regno;
+{
+ static char *rn[NUM_REGS]= REGISTER_NAMES;
+ return rn[regno];
+}
+
+
+
+
+
+/* Get ready to modify the registers array. On machines which store
+ individual registers, this doesn't need to do anything. On machines
+ which store all the registers in one fell swoop, this makes sure
+ that registers contains all the registers from the program being
+ debugged. */
+
+void
+sim_prepare_to_store ()
+{
+ /* Do nothing, since we can store individual regs */
+}
+
+static CORE_ADDR
+translate_addr(addr)
+CORE_ADDR addr;
+{
+
+ return(addr);
+
+}
+
+/* Read a word from remote address ADDR and return it.
+ * This goes through the data cache.
+ */
+int
+sim_fetch_word (addr)
+ CORE_ADDR addr;
+{
+/* return dcache_fetch (addr);*/
+}
+
+
+static void
+fetch_register(regno)
+int regno;
+{
+ if (regno == -1)
+ {
+ for (regno = 0; regno < 16; regno++)
+ fetch_register(regno);
+ }
+ else {
+ char buf[MAX_REGISTER_RAW_SIZE];
+ sim_fetch_register(regno, buf);
+ supply_register(regno, buf);
+ }
+}
+
+/* Write a word WORD into remote address ADDR.
+ This goes through the data cache. */
+
+void
+sim_store_word (addr, word)
+ CORE_ADDR addr;
+ int word;
+{
+/* dcache_poke (addr, word);*/
+}
+
+int
+sim_xfer_inferior_memory(memaddr, myaddr, len, write, target)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ int len;
+ int write;
+ struct target_ops *target; /* ignored */
+{
+ if (write)
+ {
+ sim_write(memaddr, myaddr, len);
+
+ }
+ else
+ {
+ sim_read(memaddr, myaddr, len);
+ }
+ return len;
+}
+
+void
+sim_files_info ()
+{
+char *file = "nothing";
+if (exec_bfd)
+ file = bfd_get_filename(exec_bfd);
+
+if (exec_bfd)
+#ifdef __GO32__
+ printf_filtered("\tAttached to DOS asynctsr and running program %s\n",file);
+#else
+ printf_filtered("\tAttached to %s at %d baud and running program %s\n",file);
+#endif
+ printf_filtered("\ton an H8/300 processor.\n");
+}
+
+/* This routine is run as a hook, just before the main command loop is
+ entered. If gdb is configured for the H8, but has not had its
+ target specified yet, this will loop prompting the user to do so.
+*/
+
+void
+sim_before_main_loop ()
+{
+ char ttyname[100];
+ char *p, *p2;
+ extern FILE *instream;
+ extern jmp_buf to_top_level;
+
+ push_target (&sim_ops);
+}
+
+
+#define MAX_BREAKS 16
+static int num_brkpts=0;
+static int
+sim_insert_breakpoint(addr, save)
+CORE_ADDR addr;
+char *save; /* Throw away, let sim save instructions */
+{
+ abort();
+}
+static int
+sim_remove_breakpoint(addr, save)
+CORE_ADDR addr;
+char *save; /* Throw away, let sim save instructions */
+{
+ abort();
+}
+
+/* Clear the sims notion of what the break points are */
+static int
+sim_mourn()
+{
+ sim_clear_breakpoints();
+ generic_mourn_inferior ();
+ return 0;
+}
+
+static int rem_resume(a,b)
+{
+ sim_resume(a,b);
+ return 0;
+}
+
+/* Define the target subroutine names */
+
+struct target_ops sim_ops =
+{
+ "sim", "Remote SIM monitor",
+ "Use the Z8000 simulator",
+ sim_open, sim_close,
+ 0, sim_detach, rem_resume, sim_wait, /* attach */
+ fetch_register, store_register,
+ sim_prepare_to_store,
+ sim_xfer_inferior_memory,
+ sim_files_info,
+ 0, 0, /* Breakpoints */
+ 0, 0, 0, 0, 0, /* Terminal handling */
+ sim_kill, /* FIXME, kill */
+ sim_load,
+ 0, /* lookup_symbol */
+ sim_create_inferior, /* create_inferior */
+ sim_mourn, /* mourn_inferior FIXME */
+ 0, /* can_run */
+ 0, /* notice_signals */
+ process_stratum, 0, /* next */
+ 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */
+ 0,0, /* Section pointers */
+ OPS_MAGIC, /* Always the last thing */
+};
+
+
+
+
+
+
+/***********************************************************************/
+
+void
+_initialize_remote_sim ()
+{
+ extern int sim_z8001_mode;
+ sim_z8001_mode = z8001_mode;
+ add_target (&sim_ops);
+}
+
+
--- /dev/null
+/* 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)
+#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() { }
projects / external / binutils.git / commitdiff