m88k native support

1 files changed, 225 insertions, 0 deletions

diff --git a/gdb/m88k-nat.c b/gdb/m88k-nat.c
new file mode 100644
index 0000000..15a0f7e
--- /dev/null
+++ b/gdb/m88k-nat.c
@@ -0,0 +1,225 @@
+/* Native-dependent Motorola 88xxx support for GDB, the GNU Debugger.
+   Copyright 1988, 1990, 1991, 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.  */
+
+#include "defs.h"
+#include "frame.h"
+#include "inferior.h"
+
+#ifdef USG
+#include <sys/types.h>
+#endif
+
+#include <sys/param.h>
+#include <sys/dir.h>
+#include <signal.h>
+#include "gdbcore.h"
+#include <sys/user.h>
+
+#ifndef USER			/* added to support BCS ptrace_user */
+#define USER ptrace_user
+#endif
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+
+#include "symtab.h"
+#include "setjmp.h"
+#include "value.h"
+
+#ifdef DELTA88
+/* #include <sys/ptrace.h> */
+
+/* define offsets to the pc instruction offsets in ptrace_user struct */
+#define SXIP_OFFSET (char *)&u.pt_sigframe.sig_sxip - (char *)&u
+#define SNIP_OFFSET (char *)&u.pt_sigframe.sig_snip - (char *)&u
+#define SFIP_OFFSET (char *)&u.pt_sigframe.sig_sfip - (char *)&u
+#else
+/* define offsets to the pc instruction offsets in ptrace_user struct */
+#define SXIP_OFFSET (char *)&u.pt_sigframe.dg_sigframe.sc_sxip - (char *)&u
+#define SNIP_OFFSET (char *)&u.pt_sigframe.dg_sigframe.sc_snip - (char *)&u
+#define SFIP_OFFSET (char *)&u.pt_sigframe.dg_sigframe.sc_sfip - (char *)&u
+#endif
+
+extern int have_symbol_file_p();
+
+extern jmp_buf stack_jmp;
+
+extern int errno;
+extern char registers[REGISTER_BYTES];
+
+void
+fetch_inferior_registers (regno)
+     int regno;		/* Original value discarded */
+{
+  register unsigned int regaddr;
+  char buf[MAX_REGISTER_RAW_SIZE];
+  register int i;
+
+  struct USER u;
+  unsigned int offset;
+
+  offset = (char *) &u.pt_r0 - (char *) &u; 
+  regaddr = offset; /* byte offset to r0;*/
+
+/*  offset = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */
+  for (regno = 0; regno < NUM_REGS; regno++)
+    {
+      /*regaddr = register_addr (regno, offset);*/
+	/* 88k enhancement  */
+        
+      for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
+ 	{
+ 	  *(int *) &buf[i] = ptrace (3, inferior_pid,
+				     (PTRACE_ARG3_TYPE) regaddr, 0);
+ 	  regaddr += sizeof (int);
+ 	}
+      supply_register (regno, buf);
+    }
+    /* now load up registers 36 - 38; special pc registers */
+    *(int *) &buf[0] = ptrace (3,inferior_pid,
+			       (PTRACE_ARG3_TYPE) SXIP_OFFSET ,0);
+    supply_register (SXIP_REGNUM, buf);
+    *(int *) &buf[0] = ptrace (3, inferior_pid,
+			       (PTRACE_ARG3_TYPE) SNIP_OFFSET,0);
+    supply_register (SNIP_REGNUM, buf);
+    *(int *) &buf[0] = ptrace (3, inferior_pid,
+			       (PTRACE_ARG3_TYPE) SFIP_OFFSET,0);
+    supply_register (SFIP_REGNUM, buf);
+}
+
+/* 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];
+
+  struct USER u;
+
+
+  unsigned int offset = (char *) &u.pt_r0 - (char *) &u;
+
+  regaddr = offset;
+
+  if (regno >= 0)
+    {
+/*      regaddr = register_addr (regno, offset); */
+        if (regno < PC_REGNUM)
+           { 
+	     regaddr = offset + regno * sizeof (int);
+             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 if (regno == SXIP_REGNUM)
+             ptrace (6, inferior_pid,
+		     (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register(regno));
+	else if (regno == SNIP_REGNUM)
+	     ptrace (6, inferior_pid,
+		     (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register(regno));
+	else if (regno == SFIP_REGNUM)
+	     ptrace (6, inferior_pid,
+		     (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register(regno));
+	else printf ("Bad register number for store_inferior routine\n");
+    }
+  else { 
+         for (regno = 0; regno < NUM_REGS - 3; regno++)
+           {
+      /*      regaddr = register_addr (regno, offset); */
+              errno = 0;
+              regaddr = offset + regno * sizeof (int);
+              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);
+	        }
+           }
+	 ptrace (6,inferior_pid,
+		 (PTRACE_ARG3_TYPE) SXIP_OFFSET,read_register(SXIP_REGNUM));
+	 ptrace (6,inferior_pid,
+		 (PTRACE_ARG3_TYPE) SNIP_OFFSET,read_register(SNIP_REGNUM));
+	 ptrace (6,inferior_pid,
+		 (PTRACE_ARG3_TYPE) SFIP_OFFSET,read_register(SFIP_REGNUM));
+       }	
+           
+
+}
+
+
+/* blockend is the address of the end of the user structure */
+m88k_register_u_addr (blockend, regnum)
+{
+  struct USER u;
+  int ustart = blockend - sizeof (struct USER);
+  switch (regnum)
+    {
+    case 0:
+    case 1:
+    case 2:
+    case 3:
+    case 4:
+    case 5:
+    case 6:
+    case 7:
+    case 8:
+    case 9:
+    case 10:
+    case 11:
+    case 12:
+    case 13:
+    case 14:
+    case 15:
+    case 16:
+    case 17:
+    case 18:
+    case 19:
+    case 20:
+    case 21:
+    case 22:
+    case 23:
+    case 24:
+    case 25:
+    case 26:
+    case 27:
+    case 28:
+    case 29:
+    case 30:
+    case 31:          return (ustart + ((int) &u.pt_r0 - (int) &u) + sizeof(REGISTER_TYPE) * regnum);
+    case PSR_REGNUM:  return (ustart + ((int) &u.pt_psr - (int) &u));
+    case FPSR_REGNUM: return (ustart + ((int) &u.pt_fpsr - (int) &u));
+    case FPCR_REGNUM: return (ustart + ((int) &u.pt_fpcr - (int) &u));
+    case SXIP_REGNUM: return (ustart + SXIP_OFFSET); 
+    case SNIP_REGNUM: return (ustart + SNIP_OFFSET);
+    case SFIP_REGNUM: return (ustart + SFIP_OFFSET); 
+    default: return (blockend + sizeof (REGISTER_TYPE) * regnum);
+    }
+}
+