* mdebugread.c (mylookup_symbol): enum namespace becomes

[binutils.git] / gdb / i386v-nat.c

diff --git a/gdb/i386v-nat.c b/gdb/i386v-nat.c
index 1a6213afeb02e528649f2b8cc9b803cefd999057..e2ca8326c86b0ea2aa14b5e25408fcc3e65d9ef5 100644 (file)
--- a/gdb/i386v-nat.c
+++ b/gdb/i386v-nat.c
@@ -1,5 +1,5 @@
 /* Intel 386 native support for SYSV systems (pre-SVR4).
 /* Intel 386 native support for SYSV systems (pre-SVR4).

-   Copyright (C) 1988, 1989, 1991, 1992 Free Software Foundation, Inc.
+   Copyright (C) 1988, 1989, 1991, 1992, 1994 Free Software Foundation, Inc.

 
 This file is part of GDB.
 
 
 This file is part of GDB.
 


@@ -15,7 +15,7 @@ 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
 
 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.  */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

 
 #include "defs.h"
 #include "frame.h"
 
 #include "defs.h"
 #include "frame.h"


@@ -34,8 +34,12 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #include <sys/ioctl.h>
 #include <fcntl.h>
 
 #include <sys/ioctl.h>
 #include <fcntl.h>
 

+#ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
+#include <sys/debugreg.h>
+#endif
+

 #include <sys/file.h>
 #include <sys/file.h>

-#include <sys/stat.h>
+#include "gdb_stat.h"

 
 #ifndef NO_SYS_REG_H
 #include <sys/reg.h>
 
 #ifndef NO_SYS_REG_H
 #include <sys/reg.h>


@@ -65,25 +69,216 @@ i386_register_u_addr (blockend, regnum)
      int blockend;
      int regnum;
 {
      int blockend;
      int regnum;
 {

-#if 0
-  /* this will be needed if fp registers are reinstated */
-  /* for now, you can look at them with 'info float'
-   * sys5 wont let you change them with ptrace anyway
-   */
-  if (regnum >= FP0_REGNUM && regnum <= FP7_REGNUM) 
+  struct user u;
+  int fpstate;
+  int ubase;
+
+  ubase = blockend;
+  /* FIXME:  Should have better way to test floating point range */
+  if (regnum >= FP0_REGNUM && regnum <= (FP0_REGNUM + 7)) 

     {
     {

-      int ubase, fpstate;
-      struct user u;
-      ubase = blockend + 4 * (SS + 1) - KSTKSZ;
-      fpstate = ubase + ((char *)&u.u_fpstate - (char *)&u);
+#ifdef KSTKSZ  /* SCO, and others? */
+      ubase += 4 * (SS + 1) - KSTKSZ;
+      fpstate = ubase + ((char *)&u.u_fps.u_fpstate - (char *)&u);

       return (fpstate + 0x1c + 10 * (regnum - FP0_REGNUM));
       return (fpstate + 0x1c + 10 * (regnum - FP0_REGNUM));

+#else
+      fpstate = ubase + ((char *)&u.i387.st_space - (char *)&u);
+      return (fpstate + 10 * (regnum - FP0_REGNUM));
+#endif

     } 
   else
     } 
   else

+    {
+      return (ubase + 4 * regmap[regnum]);
+    }
+  
+}
+\f
+#ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
+
+#if !defined (offsetof)
+#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)

 #endif
 #endif

-    return (blockend + 4 * regmap[regnum]);
+
+/* Record the value of the debug control register.  */
+static int debug_control_mirror;
+
+/* Record which address associates with which register.  */
+static CORE_ADDR address_lookup[DR_LASTADDR - DR_FIRSTADDR + 1];
+
+static int
+i386_insert_aligned_watchpoint PARAMS ((int, CORE_ADDR, CORE_ADDR, int,
+                                          int));
+
+static int
+i386_insert_nonaligned_watchpoint PARAMS ((int, CORE_ADDR, CORE_ADDR, int,
+                                          int));
+
+/* Insert a watchpoint.  */
+
+int
+i386_insert_watchpoint (pid, addr, len, rw)
+     int pid;
+     CORE_ADDR addr;
+     int len;
+     int rw;
+{
+  return i386_insert_aligned_watchpoint (pid, addr, addr, len, rw);
+}
+
+static int
+i386_insert_aligned_watchpoint (pid, waddr, addr, len, rw)
+     int pid;
+     CORE_ADDR waddr;
+     CORE_ADDR addr;
+     int len;
+     int rw;
+{
+  int i;
+  int read_write_bits, len_bits;
+  int free_debug_register;
+  int register_number;
+  
+  /* Look for a free debug register.  */
+  for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++)
+    {
+      if (address_lookup[i - DR_FIRSTADDR] == 0)
+       break;
+    }
+
+  /* No more debug registers!  */
+  if (i > DR_LASTADDR)
+    return -1;
+
+  read_write_bits = ((rw & 1) ? DR_RW_READ : 0) | ((rw & 2) ? DR_RW_WRITE : 0);
+
+  if (len == 1)
+    len_bits = DR_LEN_1;
+  else if (len == 2)
+    {
+      if (addr % 2)
+       return i386_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw);
+      len_bits = DR_LEN_2;
+    }
+
+  else if (len == 4)
+    {
+      if (addr % 4)
+       return i386_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw);
+      len_bits = DR_LEN_4;
+    }
+  else
+    return i386_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw);

   
   

+  free_debug_register = i;
+  register_number = free_debug_register - DR_FIRSTADDR;
+  debug_control_mirror |=
+    ((read_write_bits | len_bits)
+     << (DR_CONTROL_SHIFT + DR_CONTROL_SIZE * register_number));
+  debug_control_mirror |=
+    (1 << (DR_LOCAL_ENABLE_SHIFT + DR_ENABLE_SIZE * register_number));
+  debug_control_mirror |= DR_LOCAL_SLOWDOWN;
+  debug_control_mirror &= ~DR_CONTROL_RESERVED;
+  
+  ptrace (6, pid, offsetof (struct user, u_debugreg[DR_CONTROL]),
+         debug_control_mirror);
+  ptrace (6, pid, offsetof (struct user, u_debugreg[free_debug_register]),
+         addr);
+
+  /* Record where we came from.  */
+  address_lookup[register_number] = addr;
+  return 0;
+}
+
+static int
+i386_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw)
+     int pid;
+     CORE_ADDR waddr;
+     CORE_ADDR addr;
+     int len;
+     int rw;
+{
+  int align;
+  int size;
+  int rv;
+
+  static int size_try_array[16] = {
+    1, 1, 1, 1,                        /* trying size one */
+    2, 1, 2, 1,                        /* trying size two */
+    2, 1, 2, 1,                        /* trying size three */
+    4, 1, 2, 1                 /* trying size four */
+  };
+
+  rv = 0;
+  while (len > 0)
+    {
+      align = addr % 4;
+      /* Four is the maximum length for 386.  */
+      size = (len > 4) ? 3 : len - 1;
+      size = size_try_array[size * 4 + align];
+
+      rv = i386_insert_aligned_watchpoint (pid, waddr, addr, size, rw);
+      if (rv)
+       {
+         i386_remove_watchpoint (pid, waddr, size);
+         return rv;
+       }
+      addr += size;
+      len -= size;
+    }
+  return rv;

 }
 
 }
 

+/* Remove a watchpoint.  */
+
+int
+i386_remove_watchpoint (pid, addr, len)
+     int pid;
+     CORE_ADDR addr;
+     int len;
+{
+  int i;
+  int register_number;
+
+  for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++)
+    {
+      register_number = i - DR_FIRSTADDR;
+      if (address_lookup[register_number] == addr)
+       {
+         debug_control_mirror &=
+           ~(1 << (DR_LOCAL_ENABLE_SHIFT + DR_ENABLE_SIZE * register_number));
+         address_lookup[register_number] = 0;
+       }
+    }
+  ptrace (6, pid, offsetof (struct user, u_debugreg[DR_CONTROL]),
+         debug_control_mirror);
+  ptrace (6, pid, offsetof (struct user, u_debugreg[DR_STATUS]), 0);
+
+  return 0;
+}
+
+/* Check if stopped by a watchpoint.  */
+
+CORE_ADDR
+i386_stopped_by_watchpoint (pid)
+    int pid;
+{
+  int i;
+  int status;
+
+  status = ptrace (3, pid, offsetof (struct user, u_debugreg[DR_STATUS]), 0);
+  ptrace (6, pid, offsetof (struct user, u_debugreg[DR_STATUS]), 0);
+
+  for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++)
+    {
+      if (status & (1 << (i - DR_FIRSTADDR)))
+       return address_lookup[i - DR_FIRSTADDR];
+    }
+
+  return 0;
+}
+
+#endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
+

 #if 0
 /* using FLOAT_INFO as is would be a problem.  FLOAT_INFO is called
    via a command xxx and eventually calls ptrace without ever having
 #if 0
 /* using FLOAT_INFO as is would be a problem.  FLOAT_INFO is called
    via a command xxx and eventually calls ptrace without ever having