S390: Migrate to regcache_supply/collect_regset.

Rather than supplying own supply/collect functions, use the generic
functions regcache_supply_regset and regcache_collect_regset instead.
The register maps are rewritten accordingly and become much shorter
(and better readable) than before.

4 files changed, 188 insertions, 328 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 346f3c8..a99841e 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,52 @@
 2014-08-07  Andreas Arnez  <arnez@linux.vnet.ibm.com>
 
+	* s390-linux-nat.c: Include "regset.h".
+	(regmap_gregset): Delete macro.
+	(s390_64_regmap_gregset): New register map for
+	regcache_supply/_collect_regset.
+	(s390_64_gregset): New regset.
+	(S390_PSWM_OFFSET, S390_PSWA_OFFSET): New macros.
+	(regmap_fpregset): Delete macro.
+	(s390_native_supply, s390_native_collect): Delete functions.
+	(supply_gregset, fill_gregset): Replace s390-specific regmap
+	handling by a call to regcache_supply/_collect_regset.
+	(supply_fpregset, fill_fpregset): Call regcache_supply/
+	_collect_regset instead of s390_native_supply/_collect.
+	(fetch_regset, store_regset): Likewise.  Also change the last
+	parameter to a regset instead of a regmap.
+	(s390_linux_fetch_inferior_registers)
+	(390_linux_store_inferior_registers): Adjust last parameter in
+	calls to fetch_regset and store_regset.
+	* s390-linux-tdep.c (s390_regmap_gregset): Rename to...
+	(s390_gregmap): ... this.  Also make static const and convert to
+	regcache_map_entry format.
+	(s390x_regmap_gregset): Delete.
+	(s390_regmap_fpregset): Rename to...
+	(s390_fpregmap): ... this.  Make static const and convert to
+	regcache_map_entry format.
+	(s390_regmap_upper, s390_regmap_last_break)
+	(s390x_regmap_last_break, s390_regmap_system_call)
+	(s390_regmap_tdb): Likewise.
+	(s390_supply_regset, s390_collect_regset): Remove functions.
+	(s390_supply_tdb_regset): Call regcache_supply_regset instead of
+	s390_supply_regset.
+	(s390_gregset, s390_fpregset, s390_upper_regset)
+	(s390_last_break_regset, s390x_last_break_regset)
+	(s390_system_call_regset, s390_tdb_regset): Make global and
+	replace s390_supply/_collect_regset by regcache_supply/
+	_collect_regset.
+	(s390x_gregset): Delete.
+	(s390_gdbarch_init): Replace s390x_gregset by s390_gregset.
+	* s390-linux-tdep.h (s390_regmap_gregset, s390x_regmap_gregset)
+	(s390_regmap_fpregset, s390_regmap_last_break)
+	(s390x_regmap_last_break, s390_regmap_system_call)
+	(s390_regmap_tdb): Delete global variable declarations.
+	(s390_gregset, s390_fpregset, s390_last_break_regset)
+	(s390x_last_break_regset, s390_system_call_regset)
+	(s390_tdb_regset): New global variable declarations.
+
+2014-08-07  Andreas Arnez  <arnez@linux.vnet.ibm.com>
+
 	* regcache.c: Include "regset.h".
 	(regcache_transfer_regset): New local function.
 	(regcache_supply_regset, regcache_collect_regset): New functions.
diff --git a/gdb/s390-linux-nat.c b/gdb/s390-linux-nat.c
index 45db7c9..755cadb 100644
--- a/gdb/s390-linux-nat.c
+++ b/gdb/s390-linux-nat.c
@@ -26,6 +26,7 @@
 #include "linux-nat.h"
 #include "auxv.h"
 #include "gregset.h"
+#include "regset.h"
 
 #include "s390-linux-tdep.h"
 #include "elf/common.h"
@@ -49,42 +50,46 @@ static int have_regset_last_break = 0;
 static int have_regset_system_call = 0;
 static int have_regset_tdb = 0;
 
-/* Map registers to gregset/ptrace offsets.
-   These arrays are defined in s390-tdep.c.  */
+/* Register map for 32-bit executables running under a 64-bit
+   kernel.  */
 
 #ifdef __s390x__
-#define regmap_gregset s390x_regmap_gregset
-#else
-#define regmap_gregset s390_regmap_gregset
+static const struct regcache_map_entry s390_64_regmap_gregset[] =
+  {
+    /* Skip PSWM and PSWA, since they must be handled specially.  */
+    { 2, REGCACHE_MAP_SKIP, 8 },
+    { 1, S390_R0_UPPER_REGNUM, 4 }, { 1, S390_R0_REGNUM, 4 },
+    { 1, S390_R1_UPPER_REGNUM, 4 }, { 1, S390_R1_REGNUM, 4 },
+    { 1, S390_R2_UPPER_REGNUM, 4 }, { 1, S390_R2_REGNUM, 4 },
+    { 1, S390_R3_UPPER_REGNUM, 4 }, { 1, S390_R3_REGNUM, 4 },
+    { 1, S390_R4_UPPER_REGNUM, 4 }, { 1, S390_R4_REGNUM, 4 },
+    { 1, S390_R5_UPPER_REGNUM, 4 }, { 1, S390_R5_REGNUM, 4 },
+    { 1, S390_R6_UPPER_REGNUM, 4 }, { 1, S390_R6_REGNUM, 4 },
+    { 1, S390_R7_UPPER_REGNUM, 4 }, { 1, S390_R7_REGNUM, 4 },
+    { 1, S390_R8_UPPER_REGNUM, 4 }, { 1, S390_R8_REGNUM, 4 },
+    { 1, S390_R9_UPPER_REGNUM, 4 }, { 1, S390_R9_REGNUM, 4 },
+    { 1, S390_R10_UPPER_REGNUM, 4 }, { 1, S390_R10_REGNUM, 4 },
+    { 1, S390_R11_UPPER_REGNUM, 4 }, { 1, S390_R11_REGNUM, 4 },
+    { 1, S390_R12_UPPER_REGNUM, 4 }, { 1, S390_R12_REGNUM, 4 },
+    { 1, S390_R13_UPPER_REGNUM, 4 }, { 1, S390_R13_REGNUM, 4 },
+    { 1, S390_R14_UPPER_REGNUM, 4 }, { 1, S390_R14_REGNUM, 4 },
+    { 1, S390_R15_UPPER_REGNUM, 4 }, { 1, S390_R15_REGNUM, 4 },
+    { 16, S390_A0_REGNUM, 4 },
+    { 1, REGCACHE_MAP_SKIP, 4 }, { 1, S390_ORIG_R2_REGNUM, 4 },
+    { 0 }
+  };
+
+static const struct regset s390_64_gregset =
+  {
+    s390_64_regmap_gregset,
+    regcache_supply_regset,
+    regcache_collect_regset
+  };
+
+#define S390_PSWM_OFFSET 0
+#define S390_PSWA_OFFSET 8
 #endif
 
-#define regmap_fpregset s390_regmap_fpregset
-
-/* Fill the regset described by MAP into REGCACHE, using the values
-   from REGP.  The MAP array represents each register as a pair
-   (offset, regno) of short integers and is terminated with -1. */
-
-static void
-s390_native_supply (struct regcache *regcache, const short *map,
-		    const gdb_byte *regp)
-{
-  for (; map[0] >= 0; map += 2)
-    regcache_raw_supply (regcache, map[1], regp ? regp + map[0] : NULL);
-}
-
-/* Collect the register REGNO out of the regset described by MAP from
-   REGCACHE into REGP.  If REGNO == -1, do this for all registers in
-   this regset. */
-
-static void
-s390_native_collect (const struct regcache *regcache, const short *map,
-		     int regno, gdb_byte *regp)
-{
-  for (; map[0] >= 0; map += 2)
-    if (regno == -1 || regno == map[1])
-      regcache_raw_collect (regcache, map[1], regp + map[0]);
-}
-
 /* Fill GDB's register array with the general-purpose register values
    in *REGP.
 
@@ -100,28 +105,15 @@ supply_gregset (struct regcache *regcache, const gregset_t *regp)
   if (gdbarch_ptr_bit (gdbarch) == 32)
     {
       enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
-      ULONGEST pswm = 0, pswa = 0;
+      ULONGEST pswm, pswa;
       gdb_byte buf[4];
-      const short *map;
-
-      for (map = regmap_gregset; map[0] >= 0; map += 2)
-	{
-	  const gdb_byte *p = (const gdb_byte *) regp + map[0];
-	  int regno = map[1];
-
-	  if (regno == S390_PSWM_REGNUM)
-	    pswm = extract_unsigned_integer (p, 8, byte_order);
-	  else if (regno == S390_PSWA_REGNUM)
-	    pswa = extract_unsigned_integer (p, 8, byte_order);
-	  else
-	    {
-	      if ((regno >= S390_R0_REGNUM && regno <= S390_R15_REGNUM)
-		  || regno == S390_ORIG_R2_REGNUM)
-		p += 4;
-	      regcache_raw_supply (regcache, regno, p);
-	    }
-	}
 
+      regcache_supply_regset (&s390_64_gregset, regcache, -1,
+			      regp, sizeof (gregset_t));
+      pswm = extract_unsigned_integer ((const gdb_byte *) regp
+				       + S390_PSWM_OFFSET, 8, byte_order);
+      pswa = extract_unsigned_integer ((const gdb_byte *) regp
+				       + S390_PSWA_OFFSET, 8, byte_order);
       store_unsigned_integer (buf, 4, byte_order, (pswm >> 32) | 0x80000);
       regcache_raw_supply (regcache, S390_PSWM_REGNUM, buf);
       store_unsigned_integer (buf, 4, byte_order,
@@ -131,7 +123,8 @@ supply_gregset (struct regcache *regcache, const gregset_t *regp)
     }
 #endif
 
-  s390_native_supply (regcache, regmap_gregset, (const gdb_byte *) regp);
+  regcache_supply_regset (&s390_gregset, regcache, -1, regp,
+			  sizeof (gregset_t));
 }
 
 /* Fill register REGNO (if it is a general-purpose register) in
@@ -145,28 +138,8 @@ fill_gregset (const struct regcache *regcache, gregset_t *regp, int regno)
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   if (gdbarch_ptr_bit (gdbarch) == 32)
     {
-      gdb_byte *psw_p[2];
-      const short *map;
-
-      for (map = regmap_gregset; map[0] >= 0; map += 2)
-	{
-	  gdb_byte *p = (gdb_byte *) regp + map[0];
-	  int reg = map[1];
-
-	  if (reg >= S390_PSWM_REGNUM && reg <= S390_PSWA_REGNUM)
-	    psw_p[reg - S390_PSWM_REGNUM] = p;
-
-	  else if (regno == -1 || regno == reg)
-	    {
-	      if ((reg >= S390_R0_REGNUM && reg <= S390_R15_REGNUM)
-		  || reg == S390_ORIG_R2_REGNUM)
-		{
-		  memset (p, 0, 4);
-		  p += 4;
-		}
-	      regcache_raw_collect (regcache, reg, p);
-	    }
-	}
+      regcache_collect_regset (&s390_64_gregset, regcache, regno,
+			       regp, sizeof (gregset_t));
 
       if (regno == -1
 	  || regno == S390_PSWM_REGNUM || regno == S390_PSWA_REGNUM)
@@ -181,18 +154,19 @@ fill_gregset (const struct regcache *regcache, gregset_t *regp, int regno)
 	  pswa = extract_unsigned_integer (buf, 4, byte_order);
 
 	  if (regno == -1 || regno == S390_PSWM_REGNUM)
-	    store_unsigned_integer (psw_p[0], 8, byte_order,
-				    ((pswm & 0xfff7ffff) << 32) |
+	    store_unsigned_integer ((gdb_byte *) regp + S390_PSWM_OFFSET, 8,
+				    byte_order, ((pswm & 0xfff7ffff) << 32) |
 				    (pswa & 0x80000000));
 	  if (regno == -1 || regno == S390_PSWA_REGNUM)
-	    store_unsigned_integer (psw_p[1], 8, byte_order,
-				    pswa & 0x7fffffff);
+	    store_unsigned_integer ((gdb_byte *) regp + S390_PSWA_OFFSET, 8,
+				    byte_order, pswa & 0x7fffffff);
 	}
       return;
     }
 #endif
 
-  s390_native_collect (regcache, regmap_gregset, regno, (gdb_byte *) regp);
+  regcache_collect_regset (&s390_gregset, regcache, regno, regp,
+			   sizeof (gregset_t));
 }
 
 /* Fill GDB's register array with the floating-point register values
@@ -200,7 +174,8 @@ fill_gregset (const struct regcache *regcache, gregset_t *regp, int regno)
 void
 supply_fpregset (struct regcache *regcache, const fpregset_t *regp)
 {
-  s390_native_supply (regcache, regmap_fpregset, (const gdb_byte *) regp);
+  regcache_supply_regset (&s390_fpregset, regcache, -1, regp,
+			  sizeof (fpregset_t));
 }
 
 /* Fill register REGNO (if it is a general-purpose register) in
@@ -209,7 +184,8 @@ supply_fpregset (struct regcache *regcache, const fpregset_t *regp)
 void
 fill_fpregset (const struct regcache *regcache, fpregset_t *regp, int regno)
 {
-  s390_native_collect (regcache, regmap_fpregset, regno, (gdb_byte *) regp);
+  regcache_collect_regset (&s390_fpregset, regcache, regno, regp,
+			   sizeof (fpregset_t));
 }
 
 /* Find the TID for the current inferior thread to use with ptrace.  */
@@ -298,12 +274,13 @@ store_fpregs (const struct regcache *regcache, int tid, int regnum)
     perror_with_name (_("Couldn't write floating point status"));
 }
 
-/* Fetch all registers in the kernel's register set whose number is REGSET,
-   whose size is REGSIZE, and whose layout is described by REGMAP, from
-   process/thread TID and store their values in GDB's register cache.  */
+/* Fetch all registers in the kernel's register set whose number is
+   REGSET_ID, whose size is REGSIZE, and whose layout is described by
+   REGSET, from process/thread TID and store their values in GDB's
+   register cache.  */
 static void
 fetch_regset (struct regcache *regcache, int tid,
-	      int regset, int regsize, const short *regmap)
+	      int regset_id, int regsize, const struct regset *regset)
 {
   gdb_byte *buf = alloca (regsize);
   struct iovec iov;
@@ -311,23 +288,23 @@ fetch_regset (struct regcache *regcache, int tid,
   iov.iov_base = buf;
   iov.iov_len = regsize;
 
-  if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) < 0)
+  if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0)
     {
       if (errno == ENODATA)
-	s390_native_supply (regcache, regmap, NULL);
+	regcache_supply_regset (regset, regcache, -1, NULL, regsize);
       else
 	perror_with_name (_("Couldn't get register set"));
     }
   else
-    s390_native_supply (regcache, regmap, buf);
+    regcache_supply_regset (regset, regcache, -1, buf, regsize);
 }
 
-/* Store all registers in the kernel's register set whose number is REGSET,
-   whose size is REGSIZE, and whose layout is described by REGMAP, from
-   GDB's register cache back to process/thread TID.  */
+/* Store all registers in the kernel's register set whose number is
+   REGSET_ID, whose size is REGSIZE, and whose layout is described by
+   REGSET, from GDB's register cache back to process/thread TID.  */
 static void
 store_regset (struct regcache *regcache, int tid,
-	      int regset, int regsize, const short *regmap)
+	      int regset_id, int regsize, const struct regset *regset)
 {
   gdb_byte *buf = alloca (regsize);
   struct iovec iov;
@@ -335,12 +312,12 @@ store_regset (struct regcache *regcache, int tid,
   iov.iov_base = buf;
   iov.iov_len = regsize;
 
-  if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) < 0)
+  if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0)
     perror_with_name (_("Couldn't get register set"));
 
-  s390_native_collect (regcache, regmap, -1, buf);
+  regcache_collect_regset (regset, regcache, -1, buf, regsize);
 
-  if (ptrace (PTRACE_SETREGSET, tid, (long) regset, (long) &iov) < 0)
+  if (ptrace (PTRACE_SETREGSET, tid, (long) regset_id, (long) &iov) < 0)
     perror_with_name (_("Couldn't set register set"));
 }
 
@@ -379,17 +356,17 @@ s390_linux_fetch_inferior_registers (struct target_ops *ops,
     if (regnum == -1 || regnum == S390_LAST_BREAK_REGNUM)
       fetch_regset (regcache, tid, NT_S390_LAST_BREAK, 8,
 		    (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32
-		     ? s390_regmap_last_break : s390x_regmap_last_break));
+		     ? &s390_last_break_regset : &s390x_last_break_regset));
 
   if (have_regset_system_call)
     if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM)
       fetch_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4,
-		    s390_regmap_system_call);
+		    &s390_system_call_regset);
 
   if (have_regset_tdb)
     if (regnum == -1 || S390_IS_TDBREGSET_REGNUM (regnum))
       fetch_regset (regcache, tid, NT_S390_TDB, s390_sizeof_tdbregset,
-		    s390_regmap_tdb);
+		    &s390_tdb_regset);
 }
 
 /* Store register REGNUM back into the child process.  If REGNUM is
@@ -411,7 +388,7 @@ s390_linux_store_inferior_registers (struct target_ops *ops,
   if (have_regset_system_call)
     if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM)
       store_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4,
-		    s390_regmap_system_call);
+		    &s390_system_call_regset);
 }
 
 
diff --git a/gdb/s390-linux-tdep.c b/gdb/s390-linux-tdep.c
index d1f4749..ac8118b 100644
--- a/gdb/s390-linux-tdep.c
+++ b/gdb/s390-linux-tdep.c
@@ -419,204 +419,62 @@ s390_pseudo_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
 
 /* Maps for register sets.  */
 
-const short s390_regmap_gregset[] =
+static const struct regcache_map_entry s390_gregmap[] =
   {
-    0x00, S390_PSWM_REGNUM,
-    0x04, S390_PSWA_REGNUM,
-    0x08, S390_R0_REGNUM,
-    0x0c, S390_R1_REGNUM,
-    0x10, S390_R2_REGNUM,
-    0x14, S390_R3_REGNUM,
-    0x18, S390_R4_REGNUM,
-    0x1c, S390_R5_REGNUM,
-    0x20, S390_R6_REGNUM,
-    0x24, S390_R7_REGNUM,
-    0x28, S390_R8_REGNUM,
-    0x2c, S390_R9_REGNUM,
-    0x30, S390_R10_REGNUM,
-    0x34, S390_R11_REGNUM,
-    0x38, S390_R12_REGNUM,
-    0x3c, S390_R13_REGNUM,
-    0x40, S390_R14_REGNUM,
-    0x44, S390_R15_REGNUM,
-    0x48, S390_A0_REGNUM,
-    0x4c, S390_A1_REGNUM,
-    0x50, S390_A2_REGNUM,
-    0x54, S390_A3_REGNUM,
-    0x58, S390_A4_REGNUM,
-    0x5c, S390_A5_REGNUM,
-    0x60, S390_A6_REGNUM,
-    0x64, S390_A7_REGNUM,
-    0x68, S390_A8_REGNUM,
-    0x6c, S390_A9_REGNUM,
-    0x70, S390_A10_REGNUM,
-    0x74, S390_A11_REGNUM,
-    0x78, S390_A12_REGNUM,
-    0x7c, S390_A13_REGNUM,
-    0x80, S390_A14_REGNUM,
-    0x84, S390_A15_REGNUM,
-    0x88, S390_ORIG_R2_REGNUM,
-    -1, -1
+    { 1, S390_PSWM_REGNUM },
+    { 1, S390_PSWA_REGNUM },
+    { 16, S390_R0_REGNUM },
+    { 16, S390_A0_REGNUM },
+    { 1, S390_ORIG_R2_REGNUM },
+    { 0 }
   };
 
-const short s390x_regmap_gregset[] =
+static const struct regcache_map_entry s390_fpregmap[] =
   {
-    0x00, S390_PSWM_REGNUM,
-    0x08, S390_PSWA_REGNUM,
-    0x10, S390_R0_REGNUM,
-    0x18, S390_R1_REGNUM,
-    0x20, S390_R2_REGNUM,
-    0x28, S390_R3_REGNUM,
-    0x30, S390_R4_REGNUM,
-    0x38, S390_R5_REGNUM,
-    0x40, S390_R6_REGNUM,
-    0x48, S390_R7_REGNUM,
-    0x50, S390_R8_REGNUM,
-    0x58, S390_R9_REGNUM,
-    0x60, S390_R10_REGNUM,
-    0x68, S390_R11_REGNUM,
-    0x70, S390_R12_REGNUM,
-    0x78, S390_R13_REGNUM,
-    0x80, S390_R14_REGNUM,
-    0x88, S390_R15_REGNUM,
-    0x90, S390_A0_REGNUM,
-    0x94, S390_A1_REGNUM,
-    0x98, S390_A2_REGNUM,
-    0x9c, S390_A3_REGNUM,
-    0xa0, S390_A4_REGNUM,
-    0xa4, S390_A5_REGNUM,
-    0xa8, S390_A6_REGNUM,
-    0xac, S390_A7_REGNUM,
-    0xb0, S390_A8_REGNUM,
-    0xb4, S390_A9_REGNUM,
-    0xb8, S390_A10_REGNUM,
-    0xbc, S390_A11_REGNUM,
-    0xc0, S390_A12_REGNUM,
-    0xc4, S390_A13_REGNUM,
-    0xc8, S390_A14_REGNUM,
-    0xcc, S390_A15_REGNUM,
-    0x10, S390_R0_UPPER_REGNUM,
-    0x18, S390_R1_UPPER_REGNUM,
-    0x20, S390_R2_UPPER_REGNUM,
-    0x28, S390_R3_UPPER_REGNUM,
-    0x30, S390_R4_UPPER_REGNUM,
-    0x38, S390_R5_UPPER_REGNUM,
-    0x40, S390_R6_UPPER_REGNUM,
-    0x48, S390_R7_UPPER_REGNUM,
-    0x50, S390_R8_UPPER_REGNUM,
-    0x58, S390_R9_UPPER_REGNUM,
-    0x60, S390_R10_UPPER_REGNUM,
-    0x68, S390_R11_UPPER_REGNUM,
-    0x70, S390_R12_UPPER_REGNUM,
-    0x78, S390_R13_UPPER_REGNUM,
-    0x80, S390_R14_UPPER_REGNUM,
-    0x88, S390_R15_UPPER_REGNUM,
-    0xd0, S390_ORIG_R2_REGNUM,
-    -1, -1
+    { 1, S390_FPC_REGNUM, 8 },
+    { 16, S390_F0_REGNUM, 8 },
+    { 0 }
   };
 
-const short s390_regmap_fpregset[] =
+static const struct regcache_map_entry s390_regmap_upper[] =
   {
-    0x00, S390_FPC_REGNUM,
-    0x08, S390_F0_REGNUM,
-    0x10, S390_F1_REGNUM,
-    0x18, S390_F2_REGNUM,
-    0x20, S390_F3_REGNUM,
-    0x28, S390_F4_REGNUM,
-    0x30, S390_F5_REGNUM,
-    0x38, S390_F6_REGNUM,
-    0x40, S390_F7_REGNUM,
-    0x48, S390_F8_REGNUM,
-    0x50, S390_F9_REGNUM,
-    0x58, S390_F10_REGNUM,
-    0x60, S390_F11_REGNUM,
-    0x68, S390_F12_REGNUM,
-    0x70, S390_F13_REGNUM,
-    0x78, S390_F14_REGNUM,
-    0x80, S390_F15_REGNUM,
-    -1, -1
+    { 16, S390_R0_UPPER_REGNUM, 4 },
+    { 0 }
   };
 
-const short s390_regmap_upper[] =
+static const struct regcache_map_entry s390_regmap_last_break[] =
   {
-    0x00, S390_R0_UPPER_REGNUM,
-    0x04, S390_R1_UPPER_REGNUM,
-    0x08, S390_R2_UPPER_REGNUM,
-    0x0c, S390_R3_UPPER_REGNUM,
-    0x10, S390_R4_UPPER_REGNUM,
-    0x14, S390_R5_UPPER_REGNUM,
-    0x18, S390_R6_UPPER_REGNUM,
-    0x1c, S390_R7_UPPER_REGNUM,
-    0x20, S390_R8_UPPER_REGNUM,
-    0x24, S390_R9_UPPER_REGNUM,
-    0x28, S390_R10_UPPER_REGNUM,
-    0x2c, S390_R11_UPPER_REGNUM,
-    0x30, S390_R12_UPPER_REGNUM,
-    0x34, S390_R13_UPPER_REGNUM,
-    0x38, S390_R14_UPPER_REGNUM,
-    0x3c, S390_R15_UPPER_REGNUM,
-    -1, -1
+    { 1, REGCACHE_MAP_SKIP, 4 },
+    { 1, S390_LAST_BREAK_REGNUM, 4 },
+    { 0 }
   };
 
-const short s390_regmap_last_break[] =
+static const struct regcache_map_entry s390x_regmap_last_break[] =
   {
-    0x04, S390_LAST_BREAK_REGNUM,
-    -1, -1
+    { 1, S390_LAST_BREAK_REGNUM, 8 },
+    { 0 }
   };
 
-const short s390x_regmap_last_break[] =
+static const struct regcache_map_entry s390_regmap_system_call[] =
   {
-    0x00, S390_LAST_BREAK_REGNUM,
-    -1, -1
+    { 1, S390_SYSTEM_CALL_REGNUM, 4 },
+    { 0 }
   };
 
-const short s390_regmap_system_call[] =
+static const struct regcache_map_entry s390_regmap_tdb[] =
   {
-    0x00, S390_SYSTEM_CALL_REGNUM,
-    -1, -1
+    { 1, S390_TDB_DWORD0_REGNUM, 8 },
+    { 1, S390_TDB_ABORT_CODE_REGNUM, 8 },
+    { 1, S390_TDB_CONFLICT_TOKEN_REGNUM, 8 },
+    { 1, S390_TDB_ATIA_REGNUM, 8 },
+    { 12, REGCACHE_MAP_SKIP, 8 },
+    { 16, S390_TDB_R0_REGNUM, 8 },
+    { 0 }
   };
 
-const short s390_regmap_tdb[] =
-  {
-    0x00, S390_TDB_DWORD0_REGNUM,
-    0x08, S390_TDB_ABORT_CODE_REGNUM,
-    0x10, S390_TDB_CONFLICT_TOKEN_REGNUM,
-    0x18, S390_TDB_ATIA_REGNUM,
-    0x80, S390_TDB_R0_REGNUM,
-    0x88, S390_TDB_R1_REGNUM,
-    0x90, S390_TDB_R2_REGNUM,
-    0x98, S390_TDB_R3_REGNUM,
-    0xa0, S390_TDB_R4_REGNUM,
-    0xa8, S390_TDB_R5_REGNUM,
-    0xb0, S390_TDB_R6_REGNUM,
-    0xb8, S390_TDB_R7_REGNUM,
-    0xc0, S390_TDB_R8_REGNUM,
-    0xc8, S390_TDB_R9_REGNUM,
-    0xd0, S390_TDB_R10_REGNUM,
-    0xd8, S390_TDB_R11_REGNUM,
-    0xe0, S390_TDB_R12_REGNUM,
-    0xe8, S390_TDB_R13_REGNUM,
-    0xf0, S390_TDB_R14_REGNUM,
-    0xf8, S390_TDB_R15_REGNUM,
-    -1, -1
-  };
-
-
-/* Supply register REGNUM from the register set REGSET to register cache
-   REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
-static void
-s390_supply_regset (const struct regset *regset, struct regcache *regcache,
-		    int regnum, const void *regs, size_t len)
-{
-  const short *map;
-  for (map = regset->regmap; map[0] >= 0; map += 2)
-    if (regnum == -1 || regnum == map[1])
-      regcache_raw_supply (regcache, map[1],
-			   regs ? (const char *)regs + map[0] : NULL);
-}
 
-/* Supply the TDB regset.  Like s390_supply_regset, but invalidate the
-   TDB registers unless the TDB format field is valid.  */
+/* Supply the TDB regset.  Like regcache_supply_regset, but invalidate
+   the TDB registers unless the TDB format field is valid.  */
 
 static void
 s390_supply_tdb_regset (const struct regset *regset, struct regcache *regcache,
@@ -626,73 +484,52 @@ s390_supply_tdb_regset (const struct regset *regset, struct regcache *regcache,
   enum register_status ret;
   int i;
 
-  s390_supply_regset (regset, regcache, regnum, regs, len);
+  regcache_supply_regset (regset, regcache, regnum, regs, len);
   ret = regcache_cooked_read_unsigned (regcache, S390_TDB_DWORD0_REGNUM, &tdw);
   if (ret != REG_VALID || (tdw >> 56) != 1)
-    s390_supply_regset (regset, regcache, regnum, NULL, len);
+    regcache_supply_regset (regset, regcache, regnum, NULL, len);
 }
 
-/* Collect register REGNUM from the register cache REGCACHE and store
-   it in the buffer specified by REGS and LEN as described by the
-   general-purpose register set REGSET.  If REGNUM is -1, do this for
-   all registers in REGSET.  */
-static void
-s390_collect_regset (const struct regset *regset,
-		     const struct regcache *regcache,
-		     int regnum, void *regs, size_t len)
-{
-  const short *map;
-  for (map = regset->regmap; map[0] >= 0; map += 2)
-    if (regnum == -1 || regnum == map[1])
-      regcache_raw_collect (regcache, map[1], (char *)regs + map[0]);
-}
-
-static const struct regset s390_gregset = {
-  s390_regmap_gregset,
-  s390_supply_regset,
-  s390_collect_regset
+const struct regset s390_gregset = {
+  s390_gregmap,
+  regcache_supply_regset,
+  regcache_collect_regset
 };
 
-static const struct regset s390x_gregset = {
-  s390x_regmap_gregset,
-  s390_supply_regset,
-  s390_collect_regset
-};
-
-static const struct regset s390_fpregset = {
-  s390_regmap_fpregset,
-  s390_supply_regset,
-  s390_collect_regset
+const struct regset s390_fpregset = {
+  s390_fpregmap,
+  regcache_supply_regset,
+  regcache_collect_regset
 };
 
 static const struct regset s390_upper_regset = {
   s390_regmap_upper,
-  s390_supply_regset,
-  s390_collect_regset
+  regcache_supply_regset,
+  regcache_collect_regset
 };
 
-static const struct regset s390_last_break_regset = {
+const struct regset s390_last_break_regset = {
   s390_regmap_last_break,
-  s390_supply_regset,
-  s390_collect_regset
+  regcache_supply_regset,
+  regcache_collect_regset
 };
 
-static const struct regset s390x_last_break_regset = {
+const struct regset s390x_last_break_regset = {
   s390x_regmap_last_break,
-  s390_supply_regset,
-  s390_collect_regset
+  regcache_supply_regset,
+  regcache_collect_regset
 };
 
-static const struct regset s390_system_call_regset = {
+const struct regset s390_system_call_regset = {
   s390_regmap_system_call,
-  s390_supply_regset,
-  s390_collect_regset
+  regcache_supply_regset,
+  regcache_collect_regset
 };
 
-static const struct regset s390_tdb_regset = {
+const struct regset s390_tdb_regset = {
   s390_regmap_tdb,
   s390_supply_tdb_regset,
-  s390_collect_regset
+  regcache_collect_regset
 };
 
 static struct core_regset_section s390_linux32_regset_sections[] =
@@ -3370,7 +3207,7 @@ s390_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
       break;
 
     case ABI_LINUX_ZSERIES:
-      tdep->gregset = &s390x_gregset;
+      tdep->gregset = &s390_gregset;
       tdep->sizeof_gregset = s390x_sizeof_gregset;
       tdep->fpregset = &s390_fpregset;
       tdep->sizeof_fpregset = s390_sizeof_fpregset;
diff --git a/gdb/s390-linux-tdep.h b/gdb/s390-linux-tdep.h
index 52bed9d..1e12000 100644
--- a/gdb/s390-linux-tdep.h
+++ b/gdb/s390-linux-tdep.h
@@ -150,15 +150,14 @@
 
 /* Core file register sets, defined in s390-tdep.c.  */
 #define s390_sizeof_gregset 0x90
-extern const short s390_regmap_gregset[];
 #define s390x_sizeof_gregset 0xd8
-extern const short s390x_regmap_gregset[];
+extern const struct regset s390_gregset;
 #define s390_sizeof_fpregset 0x88
-extern const short s390_regmap_fpregset[];
-extern const short s390_regmap_last_break[];
-extern const short s390x_regmap_last_break[];
-extern const short s390_regmap_system_call[];
-extern const short s390_regmap_tdb[];
+extern const struct regset s390_fpregset;
+extern const struct regset s390_last_break_regset;
+extern const struct regset s390x_last_break_regset;
+extern const struct regset s390_system_call_regset;
+extern const struct regset s390_tdb_regset;
 #define s390_sizeof_tdbregset 0x100
 
 /* GNU/Linux target descriptions.  */