2004-04-22 Andrew Cagney <cagney@redhat.com>

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

diff --git a/gdb/i386v-nat.c b/gdb/i386v-nat.c
index c603b2819666d976d6b8060ecd7b73f995c866e1..678eabc346d9a56601f3ac4f346bd4f88ec16113 100644 (file)
--- a/gdb/i386v-nat.c
+++ b/gdb/i386v-nat.c
@@ -1,4 +1,4 @@
-/* Intel 386 native support for SYSV systems (pre-SVR4).
+/* Intel 386 native support for System V systems (pre-SVR4).
 
    Copyright 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1998,
    1999, 2000, 2002 Free Software Foundation, Inc.
@@ -60,10 +60,12 @@
 #include "floatformat.h"
 
 #include "target.h"
+
+#include "i386-tdep.h"
 \f
 
-/* this table must line up with REGISTER_NAMES in tm-i386v.h */
-/* symbols like 'EAX' come from <sys/reg.h> */
+/* Mapping between the general-purpose registers in `struct user'
+   format and GDB's register array layout.  */
 static int regmap[] =
 {
   EAX, ECX, EDX, EBX,
@@ -72,37 +74,34 @@ static int regmap[] =
   DS, ES, FS, GS,
 };
 
-/* blockend is the value of u.u_ar0, and points to the
- * place where GS is stored
- */
+/* Support for the user struct.  */
 
-int
-i386_register_u_addr (int blockend, int regnum)
+/* Return the address of register REGNUM.  BLOCKEND is the value of
+   u.u_ar0, and points to the place where GS is stored.  */
+
+CORE_ADDR
+register_u_addr (CORE_ADDR blockend, int regnum)
 {
   struct user u;
-  int fpstate;
-  int ubase;
+  CORE_ADDR fpstate;
 
-  ubase = blockend;
-  /* FIXME:  Should have better way to test floating point range */
-  if (regnum >= FP0_REGNUM && regnum <= (FP0_REGNUM + 7))
+  if (i386_fp_regnum_p (regnum))
     {
-#ifdef KSTKSZ                  /* SCO, and others? */
-      ubase += 4 * (SS + 1) - KSTKSZ;
-      fpstate = ubase + ((char *) &u.u_fps.u_fpstate - (char *) &u);
+#ifdef KSTKSZ                  /* SCO, and others?  */
+      blockend += 4 * (SS + 1) - KSTKSZ;
+      fpstate = blockend + ((char *) &u.u_fps.u_fpstate - (char *) &u);
       return (fpstate + 0x1c + 10 * (regnum - FP0_REGNUM));
 #else
-      fpstate = ubase + ((char *) &u.i387.st_space - (char *) &u);
+      fpstate = blockend + ((char *) &u.i387.st_space - (char *) &u);
       return (fpstate + 10 * (regnum - FP0_REGNUM));
 #endif
     }
-  else
-    {
-      return (ubase + 4 * regmap[regnum]);
-    }
 
+  return (blockend + 4 * regmap[regnum]);
 }
-\f
+
+/* Return the size of the user struct.  */
+
 int
 kernel_u_size (void)
 {
@@ -121,11 +120,11 @@ 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 (int, CORE_ADDR, CORE_ADDR, int, int);
+static int i386_insert_aligned_watchpoint (int, CORE_ADDR, CORE_ADDR, int,
+                                          int);
 
-static int
-i386_insert_nonaligned_watchpoint (int, CORE_ADDR, CORE_ADDR, int, int);
+static int i386_insert_nonaligned_watchpoint (int, CORE_ADDR, CORE_ADDR, int,
+                                             int);
 
 /* Insert a watchpoint.  */