Initial creation of sourceware repository

1 files changed, 0 insertions, 370 deletions

diff --git a/gdb/pyr-xdep.c b/gdb/pyr-xdep.c
deleted file mode 100644
index dd6d9a9..0000000
--- a/gdb/pyr-xdep.c
+++ /dev/null
@@ -1,370 +0,0 @@
-/* Low level Pyramid interface to ptrace, for GDB when running under Unix.
-   Copyright (C) 1988, 1989, 1991 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
-
-#include "defs.h"
-#include "frame.h"
-#include "inferior.h"
-
-#include <sys/param.h>
-#include <sys/dir.h>
-#include <signal.h>
-#include <sys/ioctl.h>
-/* #include <fcntl.h>  Can we live without this?  */
-
-#include "gdbcore.h"
-#include <sys/user.h>		/* After a.out.h  */
-#include <sys/file.h>
-#include "gdb_stat.h"
-
-
-void
-fetch_inferior_registers (regno)
-     int regno;
-{
-  register int datum;
-  register unsigned int regaddr;
-  int reg_buf[NUM_REGS+1];
-  struct user u;
-  register int skipped_frames = 0;
-
-  registers_fetched ();
-  
-  for (regno = 0; regno < 64; regno++) {
-    reg_buf[regno] = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) regno, 0);
-    
-#if defined(PYRAMID_CONTROL_FRAME_DEBUGGING)
-    printf_unfiltered ("Fetching register %s, got %0x\n",
-	    REGISTER_NAME (regno),
-	    reg_buf[regno]);
-#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
-    
-    if (reg_buf[regno] == -1 && errno == EIO) {
-      printf_unfiltered("fetch_interior_registers: fetching register %s\n",
-	     REGISTER_NAME (regno));
-      errno = 0;
-    }
-    supply_register (regno, reg_buf+regno);
-  }
-  /* that leaves regs 64, 65, and 66 */
-  datum = ptrace (3, inferior_pid,
-		  (PTRACE_ARG3_TYPE) (((char *)&u.u_pcb.pcb_csp) -
-		  ((char *)&u)), 0);
-  
-  
-  
-  /* FIXME: Find the Current Frame Pointer (CFP). CFP is a global
-     register (ie, NOT windowed), that gets saved in a frame iff
-     the code for that frame has a prologue (ie, "adsf N").  If
-     there is a prologue, the adsf insn saves the old cfp in
-     pr13, cfp is set to sp, and N bytes of locals are allocated
-     (sp is decremented by n).
-     This makes finding CFP hard. I guess the right way to do it
-     is: 
-     - If this is the innermost frame, believe ptrace() or
-     the core area.
-     - Otherwise:
-     Find the first insn of the current frame.
-     - find the saved pc;
-     - find the call insn that saved it;
-     - figure out where the call is to;
-     - if the first insn is an adsf, we got a frame
-     pointer. */
-  
-  
-  /* Normal processors have separate stack pointers for user and
-     kernel mode. Getting the last user mode frame on such
-     machines is easy: the kernel context of the ptrace()'d
-     process is on the kernel stack, and the USP points to what
-     we want. But Pyramids only have a single cfp for both user and
-     kernel mode.  And processes being ptrace()'d have some
-     kernel-context control frames on their stack.
-     To avoid tracing back into the kernel context of an inferior,
-     we skip 0 or more contiguous control frames where the pc is
-     in the kernel. */ 
-  
-  while (1) {
-    register int inferior_saved_pc;
-    inferior_saved_pc = ptrace (1, inferior_pid,
-				(PTRACE_ARG3_TYPE) (datum+((32+15)*4)), 0);
-    if (inferior_saved_pc > 0) break;
-#if defined(PYRAMID_CONTROL_FRAME_DEBUGGING)
-    printf_unfiltered("skipping kernel frame %08x, pc=%08x\n", datum,
-	   inferior_saved_pc);
-#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
-    skipped_frames++;
-    datum -= CONTROL_STACK_FRAME_SIZE;
-  }
-  
-  reg_buf[CSP_REGNUM] = datum;
-  supply_register(CSP_REGNUM, reg_buf+CSP_REGNUM);
-#ifdef  PYRAMID_CONTROL_FRAME_DEBUGGING
-  if (skipped_frames) {
-    fprintf_unfiltered (gdb_stderr,
-	     "skipped %d frames from %x to %x; cfp was %x, now %x\n",
-	     skipped_frames, reg_buf[CSP_REGNUM]);
-  }
-#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
-}
-
-/* Store our register values back into the inferior.
-   If REGNO is -1, do this for all registers.
-   Otherwise, REGNO specifies which register (so we can save time).  */
-
-void
-store_inferior_registers (regno)
-     int regno;
-{
-  register unsigned int regaddr;
-  char buf[80];
-
-  if (regno >= 0)
-    {
-      if ((0 <= regno) && (regno < 64)) {
-	/*regaddr = register_addr (regno, offset);*/
-	regaddr = regno;
-	errno = 0;
-	ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
-		read_register (regno));
-	if (errno != 0)
-	  {
-	    sprintf (buf, "writing register number %d", regno);
-	    perror_with_name (buf);
-	  }
-      }
-    }
-  else
-    {
-      for (regno = 0; regno < NUM_REGS; regno++)
-	{
-	  /*regaddr = register_addr (regno, offset);*/
-	  regaddr = regno;
-	  errno = 0;
-	  ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
-		  read_register (regno));
-	  if (errno != 0)
-	    {
-	      sprintf (buf, "writing all regs, number %d", regno);
-	      perror_with_name (buf);
-	    }
-	}
-}
-
-/*** Extensions to  core and dump files, for GDB. */
-
-extern unsigned int last_frame_offset;
-
-#ifdef PYRAMID_CORE
-
-/* Can't make definitions here static, since corefile.c needs them
-   to do bounds checking on the core-file areas. O well. */
-
-/* have two stacks: one for data, one for register windows. */
-extern CORE_ADDR reg_stack_start;
-extern CORE_ADDR reg_stack_end;
-
-/* need this so we can find the global registers: they never get saved. */
-CORE_ADDR global_reg_offset;
-static CORE_ADDR last_frame_address;
-CORE_ADDR last_frame_offset;
-
-
-/* Address in core file of start of register window stack area.
-   Don't know if is this any of meaningful, useful or necessary.   */
-extern int reg_stack_offset;
-
-#endif /* PYRAMID_CORE */  
-
-
-/* Work with core dump and executable files, for GDB. 
-   This code would be in corefile.c if it weren't machine-dependent. */
-
-void
-core_file_command (filename, from_tty)
-     char *filename;
-     int from_tty;
-{
-  int val;
-  extern char registers[];
-
-  /* Discard all vestiges of any previous core file
-     and mark data and stack spaces as empty.  */
-
-  if (corefile)
-    free (corefile);
-  corefile = 0;
-
-  if (corechan >= 0)
-    close (corechan);
-  corechan = -1;
-
-  data_start = 0;
-  data_end = 0;
-  stack_start = STACK_END_ADDR;
-  stack_end = STACK_END_ADDR;
-
-#ifdef PYRAMID_CORE
-  reg_stack_start = CONTROL_STACK_ADDR;
-  reg_stack_end = CONTROL_STACK_ADDR;	/* this isn't strictly true...*/
-#endif /* PYRAMID_CORE */
-
-  /* Now, if a new core file was specified, open it and digest it.  */
-
-  if (filename)
-    {
-      filename = tilde_expand (filename);
-      make_cleanup (free, filename);
-      
-      if (have_inferior_p ())
-	error ("To look at a core file, you must kill the program with \"kill\".");
-      corechan = open (filename, O_RDONLY, 0);
-      if (corechan < 0)
-	perror_with_name (filename);
-      /* 4.2-style (and perhaps also sysV-style) core dump file.  */
-      {
-	struct user u;
-
-	unsigned int reg_offset;
-
-	val = myread (corechan, &u, sizeof u);
-	if (val < 0)
-	  perror_with_name ("Not a core file: reading upage");
-	if (val != sizeof u)
-	  error ("Not a core file: could only read %d bytes", val);
-	data_start = exec_data_start;
-
-	data_end = data_start + NBPG * u.u_dsize;
-	data_offset = NBPG * UPAGES;
-	stack_offset = NBPG * (UPAGES + u.u_dsize);
-
-	/* find registers in core file */
-#ifdef PYRAMID_PTRACE
-	stack_start = stack_end - NBPG * u.u_ussize;
-	reg_stack_offset = stack_offset + (NBPG *u.u_ussize);
-	reg_stack_end = reg_stack_start + NBPG * u.u_cssize;
-
-	last_frame_address = ((int) u.u_pcb.pcb_csp);
-	last_frame_offset = reg_stack_offset + last_frame_address
-		- CONTROL_STACK_ADDR ;
-	global_reg_offset = (char *)&u - (char *)&u.u_pcb.pcb_gr0 ;
-
-	/* skip any control-stack frames that were executed in the
-	   kernel. */
-
-	while (1) {
-	    char buf[4];
-	    val = lseek (corechan, last_frame_offset+(47*4), 0);
-	    if (val < 0)
-		    perror_with_name (filename);
-	    val = myread (corechan, buf, sizeof buf);
-	    if (val < 0)
-		    perror_with_name (filename);
-
-	    if (*(int *)buf >= 0)
-		    break;
-	    printf_unfiltered ("skipping frame %s\n", local_hex_string (last_frame_address));
-	    last_frame_offset -= CONTROL_STACK_FRAME_SIZE;
-	    last_frame_address -= CONTROL_STACK_FRAME_SIZE;
-	}
-	reg_offset = last_frame_offset;
-
-#if 1 || defined(PYRAMID_CONTROL_FRAME_DEBUGGING)
-	printf_unfiltered ("Control stack pointer = %s\n",
-		local_hex_string (u.u_pcb.pcb_csp));
-	printf_unfiltered ("offset to control stack %d outermost frame %d (%s)\n",
-	      reg_stack_offset, reg_offset, local_hex_string (last_frame_address));
-#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
-
-#else /* not PYRAMID_CORE */
-	stack_start = stack_end - NBPG * u.u_ssize;
-        reg_offset = (int) u.u_ar0 - KERNEL_U_ADDR;
-#endif /* not PYRAMID_CORE */
-
-#ifdef __not_on_pyr_yet
-	/* Some machines put an absolute address in here and some put
-	   the offset in the upage of the regs.  */
-	reg_offset = (int) u.u_ar0;
-	if (reg_offset > NBPG * UPAGES)
-	  reg_offset -= KERNEL_U_ADDR;
-#endif
-
-	/* I don't know where to find this info.
-	   So, for now, mark it as not available.  */
-	N_SET_MAGIC (core_aouthdr, 0);
-
-	/* Read the register values out of the core file and store
-	   them where `read_register' will find them.  */
-
-	{
-	  register int regno;
-
-	  for (regno = 0; regno < 64; regno++)
-	    {
-	      char buf[MAX_REGISTER_RAW_SIZE];
-
-	      val = lseek (corechan, register_addr (regno, reg_offset), 0);
-	      if (val < 0
-		  || (val = myread (corechan, buf, sizeof buf)) < 0)
-		{
-		  char * buffer = (char *) alloca (strlen (REGISTER_NAME (regno))
-						   + 30);
-		  strcpy (buffer, "Reading register ");
-		  strcat (buffer, REGISTER_NAME (regno));
-						   
-		  perror_with_name (buffer);
-		}
-
-	      if (val < 0)
-		perror_with_name (filename);
-#ifdef PYRAMID_CONTROL_FRAME_DEBUGGING
-      printf_unfiltered ("[reg %s(%d), offset in file %s=0x%0x, addr =0x%0x, =%0x]\n",
-	      REGISTER_NAME (regno), regno, filename,
-	      register_addr(regno, reg_offset),
-	      regno * 4 + last_frame_address,
-	      *((int *)buf));
-#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
-	      supply_register (regno, buf);
-	    }
-	}
-      }
-      if (filename[0] == '/')
-	corefile = savestring (filename, strlen (filename));
-      else
-	{
-	  corefile = concat (current_directory, "/", filename, NULL);
-	}
-
-#if 1 || defined(PYRAMID_CONTROL_FRAME_DEBUGGING)
-      printf_unfiltered ("Providing CSP (%s) as nominal address of current frame.\n",
-	      local_hex_string(last_frame_address));
-#endif PYRAMID_CONTROL_FRAME_DEBUGGING
-      /* FIXME: Which of the following is correct? */
-#if 0
-      set_current_frame ( create_new_frame (read_register (FP_REGNUM),
-					    read_pc ()));
-#else
-      set_current_frame ( create_new_frame (last_frame_address,
-					    read_pc ()));
-#endif
-
-      select_frame (get_current_frame (), 0);
-      validate_files ();
-    }
-  else if (from_tty)
-    printf_unfiltered ("No core file now.\n");
-}