Polishing z8k simulator support
This commit is contained in:
Steve Chamberlain
parent
675e8ac9a2
commit
1f21d3dc1a
2 changed files with 328 additions and 88 deletions
101
gdb/remote-z8k.c
101
gdb/remote-z8k.c
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@ -40,12 +40,7 @@ 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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@ -55,10 +50,11 @@ sim_write_inferior_memory (memaddr, myaddr, len)
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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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sim_write(memaddr, myaddr, len);
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return 1;
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}
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static int
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static void
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store_register(regno)
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int regno;
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{
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@ -71,7 +67,6 @@ int regno;
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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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@ -144,14 +139,13 @@ int fromtty;
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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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static 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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@ -161,15 +155,10 @@ sim_create_inferior (execfile, args, env)
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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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insert_breakpoints ();
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proceed(entry_pt, -1, 0);
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}
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@ -200,19 +189,13 @@ 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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static void
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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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@ -222,7 +205,6 @@ sim_detach (args,from_tty)
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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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@ -235,26 +217,10 @@ 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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*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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@ -262,31 +228,12 @@ get_reg_name (regno)
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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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static 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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@ -359,45 +306,23 @@ if (exec_bfd)
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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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static void
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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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static void rem_resume(a,b)
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int a;
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int 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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315
gdb/tm-z8k.h
Normal file
315
gdb/tm-z8k.h
Normal file
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@ -0,0 +1,315 @@
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/* Parameters for execution on a z8000 series machine.
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Copyright 1992 Free Software Foundation, Inc.
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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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#define IEEE_FLOAT 1
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#undef TARGET_INT_BIT
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#undef TARGET_LONG_BIT
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#undef TARGET_SHORT_BIT
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#undef TARGET_PTR_BIT
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#define TARGET_SHORT_BIT 16
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#define TARGET_INT_BIT 16
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#define TARGET_LONG_BIT 32
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#define TARGET_PTR_BIT (BIG ? 32: 16)
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/* Define the bit, byte, and word ordering of the machine. */
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#define TARGET_BYTE_ORDER BIG_ENDIAN
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/* Offset from address of function to start of its code.
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Zero on most machines. */
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#define FUNCTION_START_OFFSET 0
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/* Advance PC across any function entry prologue instructions
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to reach some "real" code. */
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#define SKIP_PROLOGUE(ip) {(ip) = z8k_skip_prologue(ip);}
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extern CORE_ADDR mz8k_skip_prologue PARAMS ((CORE_ADDR ip));
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/* Immediately after a function call, return the saved pc.
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Can't always go through the frames for this because on some machines
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the new frame is not set up until the new function executes
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some instructions. */
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#define SAVED_PC_AFTER_CALL(frame) saved_pc_after_call(frame)
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/* Stack grows downward. */
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#define INNER_THAN <
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/* Sequence of bytes for breakpoint instruction. */
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#define BREAKPOINT {0x36,0x00}
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/* If your kernel resets the pc after the trap happens you may need to
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define this before including this file. */
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#define DECR_PC_AFTER_BREAK 0
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/* Nonzero if instruction at PC is a return instruction. */
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/* Allow any of the return instructions, including a trapv and a return
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from interupt. */
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#define ABOUT_TO_RETURN(pc) about_to_return(pc)
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/* Return 1 if P points to an invalid floating point value. */
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#define INVALID_FLOAT(p, len) 0 /* Just a first guess; not checked */
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/* Say how long registers are. */
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#define REGISTER_TYPE unsigned int
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#define NUM_REGS 23 /* 16 registers + 1 ccr + 1 pc + 3 debug
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regs + fake fp + fake sp*/
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#define REGISTER_BYTES (NUM_REGS *4)
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/* Index within `registers' of the first byte of the space for
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register N. */
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#define REGISTER_BYTE(N) ((N)*4)
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/* Number of bytes of storage in the actual machine representation
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for register N. On the z8k, all but the pc are 2 bytes, but we
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keep them all as 4 bytes and trim them on I/O */
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#define REGISTER_RAW_SIZE(N) (((N) < 16)? 2:4)
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/* Number of bytes of storage in the program's representation
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for register N. */
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#define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N)
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/* Largest value REGISTER_RAW_SIZE can have. */
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#define MAX_REGISTER_RAW_SIZE 4
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/* Largest value REGISTER_VIRTUAL_SIZE can have. */
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#define MAX_REGISTER_VIRTUAL_SIZE 4
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/* Nonzero if register N requires conversion
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from raw format to virtual format. */
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#define REGISTER_CONVERTIBLE(N) 0
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/* Convert data from raw format for register REGNUM
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to virtual format for register REGNUM. */
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#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \
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register_convert_to_virtual(REGNUM, FROM, TO)
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/* Convert data from virtual format for register REGNUM
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to raw format for register REGNUM. */
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#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \
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register_convert_to_raw(REGNUM, FROM, TO)
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/* Return the GDB type object for the "standard" data type
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of data in register N. */
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#define REGISTER_VIRTUAL_TYPE(N) \
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(REGISTER_VIRTUAL_SIZE(N) == 2? builtin_type_unsigned_int : builtin_type_long)
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/*#define INIT_FRAME_PC(x,y) init_frame_pc(x,y)*/
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/* Initializer for an array of names of registers.
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Entries beyond the first NUM_REGS are ignored. */
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#define REGISTER_NAMES \
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{"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
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"ccr", "pc", "cycles","insts","time","fp","sp"}
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/* Register numbers of various important registers.
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Note that some of these values are "real" register numbers,
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and correspond to the general registers of the machine,
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and some are "phony" register numbers which are too large
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to be actual register numbers as far as the user is concerned
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but do serve to get the desired values when passed to read_register. */
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#define CCR_REGNUM 16 /* Contains processor status */
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#define PC_REGNUM 17 /* Contains program counter */
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#define CYCLES_REGNUM 18
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#define INSTS_REGNUM 19
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#define TIME_REGNUM 20
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#define FP_REGNUM 21 /* Contains fp, whatever memory model */
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#define SP_REGNUM 22 /* Conatins sp, whatever memory model */
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#define PTR_SIZE (BIG ? 4: 2)
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#define PTR_MASK (BIG ? 0xff00ffff : 0x0000ffff)
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/* Store the address of the place in which to copy the structure the
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subroutine will return. This is called from call_function. */
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#define STORE_STRUCT_RETURN(ADDR, SP) store_struct_return(ADDR,SP)
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/* Extract from an array REGBUF containing the (raw) register state
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a function return value of type TYPE, and copy that, in virtual format,
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into VALBUF. This is assuming that floating point values are returned
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as doubles in d0/d1. */
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#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
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extract_return_value(TYPE,REGBUF,VALBUF)
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/* Write into appropriate registers a function return value
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of type TYPE, given in virtual format. Assumes floats are passed
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in d0/d1. */
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#define STORE_RETURN_VALUE(TYPE,VALBUF) store_return_value(TYPE,VALBUF);
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/* Extract from an array REGBUF containing the (raw) register state
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the address in which a function should return its structure value,
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as a CORE_ADDR (or an expression that can be used as one). */
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#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF))
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/* Describe the pointer in each stack frame to the previous stack frame
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(its caller). */
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/* FRAME_CHAIN takes a frame's nominal address and produces the frame's
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chain-pointer.
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In the case of the 68000, the frame's nominal address
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is the address of a 4-byte word containing the calling frame's address. */
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#define FRAME_CHAIN(thisframe) frame_chain(thisframe)
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/* Define other aspects of the stack frame. */
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/* A macro that tells us whether the function invocation represented
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by FI does not have a frame on the stack associated with it. If it
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does not, FRAMELESS is set to 1, else 0. */
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#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
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(FRAMELESS) = frameless_look_for_prologue(FI)
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#define FRAME_SAVED_PC(FRAME) frame_saved_pc(FRAME)
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#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
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#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
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/* Set VAL to the number of args passed to frame described by FI.
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Can set VAL to -1, meaning no way to tell. */
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/* We can't tell how many args there are
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now that the C compiler delays popping them. */
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#if !defined (FRAME_NUM_ARGS)
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#define FRAME_NUM_ARGS(val,fi) (val = -1)
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#endif
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/* Return number of bytes at start of arglist that are not really args. */
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#define FRAME_ARGS_SKIP 8
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/* Things needed for making the inferior call functions.
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It seems like every m68k based machine has almost identical definitions
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in the individual machine's configuration files. Most other cpu types
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(mips, i386, etc) have routines in their *-tdep.c files to handle this
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for most configurations. The m68k family should be able to do this as
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well. These macros can still be overridden when necessary. */
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/* The CALL_DUMMY macro is the sequence of instructions, as disassembled
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by gdb itself:
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fmovemx fp0-fp7,sp@- 0xf227 0xe0ff
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moveml d0-a5,sp@- 0x48e7 0xfffc
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clrw sp@- 0x4267
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movew ccr,sp@- 0x42e7
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/..* The arguments are pushed at this point by GDB;
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no code is needed in the dummy for this.
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The CALL_DUMMY_START_OFFSET gives the position of
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the following jsr instruction. *../
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jsr @#0x32323232 0x4eb9 0x3232 0x3232
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addal #0x69696969,sp 0xdffc 0x6969 0x6969
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trap #<your BPT_VECTOR number here> 0x4e4?
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nop 0x4e71
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Note this is CALL_DUMMY_LENGTH bytes (28 for the above example).
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We actually start executing at the jsr, since the pushing of the
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registers is done by PUSH_DUMMY_FRAME. If this were real code,
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the arguments for the function called by the jsr would be pushed
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between the moveml and the jsr, and we could allow it to execute through.
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But the arguments have to be pushed by GDB after the PUSH_DUMMY_FRAME is
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done, and we cannot allow the moveml to push the registers again lest
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they be taken for the arguments. */
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#define CALL_DUMMY { 0 }
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#define CALL_DUMMY_LENGTH 24 /* Size of CALL_DUMMY */
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#define CALL_DUMMY_START_OFFSET 8 /* Offset to jsr instruction*/
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/* Insert the specified number of args and function address
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into a call sequence of the above form stored at DUMMYNAME.
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We use the BFD routines to store a big-endian value of known size. */
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#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
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{ _do_putb32 (fun, (char *) dummyname + CALL_DUMMY_START_OFFSET + 2); \
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_do_putb32 (nargs*4, (char *) dummyname + CALL_DUMMY_START_OFFSET + 8); }
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/* Push an empty stack frame, to record the current PC, etc. */
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#define PUSH_DUMMY_FRAME { z8k_push_dummy_frame (); }
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extern void z8k_push_dummy_frame PARAMS ((void));
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extern void z8k_pop_frame PARAMS ((void));
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||||
|
||||
/* Discard from the stack the innermost frame, restoring all registers. */
|
||||
|
||||
#define POP_FRAME { z8k_pop_frame (); }
|
||||
|
||||
/* Offset from SP to first arg on stack at first instruction of a function */
|
||||
|
||||
#define SP_ARG0 (1 * 4)
|
||||
|
||||
#define ADDR_BITS_REMOVE(x) addr_bits_remove(x)
|
||||
#define ADDR_BITS_SET(x) addr_bits_set(x)
|
||||
int z8001_mode;
|
||||
#define BIG (z8001_mode)
|
||||
|
||||
#define read_memory_short(x) (read_memory_integer(x,2) & 0xffff)
|
||||
|
||||
#define NO_STD_REGS
|
||||
|
||||
|
||||
|
||||
#define PRINT_REGISTER_HOOK(regno) print_register_hook(regno)
|
||||
|
||||
|
||||
/* Define this if the C compiler puts an underscore at the front
|
||||
of external names before giving them to the linker. */
|
||||
|
||||
#define NAMES_HAVE_UNDERSCORE
|
||||
|
||||
#define ADDITIONAL_OPTIONS {"z8001",no_argument,&z8001_mode, 1},
|
||||
Loading…
Reference in a new issue