[RFC 21/23] TILEGX Linux: Fill 'collect_regset' in regset structure

[Andreas Arnez <arnez at linux dot vnet dot ibm dot com>]

gdb/
	* tilegx-linux-tdep.c (tilegx_linux_supply_regset): Delete
	function.  Move logic to...
	(tilegx_linux_regmap): ... this new register map.
	(TILEGX_GREGS_SIZE): New enum value.
	(tilegx_linux_regset): Refer to register map, replace supply
	method by regcache_supply_regset, and add collect method.
---
 gdb/tilegx-linux-tdep.c | 37 +++++++++++++++----------------------
 1 file changed, 15 insertions(+), 22 deletions(-)

diff --git a/gdb/tilegx-linux-tdep.c b/gdb/tilegx-linux-tdep.c
index 98b03db..4169433 100644
--- a/gdb/tilegx-linux-tdep.c
+++ b/gdb/tilegx-linux-tdep.c
@@ -73,34 +73,27 @@ static const struct tramp_frame tilegx_linux_rt_sigframe =
   tilegx_linux_sigframe_init
 };
 
-/* Supply raw registers from REGCACHE to REGS.  */
+/* Register map; must match struct pt_regs in "ptrace.h".  */
 
-static void
-tilegx_linux_supply_regset (const struct regset *regset,
-			    struct regcache *regcache,
-			    int regnum, const void *regs, size_t len)
-{
-  struct gdbarch *arch = get_regcache_arch (regcache);
-  const char *ptr = regs;
-  int i;
-
-  /* This logic must match that of struct pt_regs in "ptrace.h".  */
-  for (i = 0; i < TILEGX_NUM_EASY_REGS + 2; i++, ptr += tilegx_reg_size)
-    {
-      int gri = (i < TILEGX_NUM_EASY_REGS)
-                 ? i : (i == TILEGX_NUM_EASY_REGS)
-                        ? TILEGX_PC_REGNUM : TILEGX_FAULTNUM_REGNUM;
+static const struct regcache_map_entry tilegx_linux_regmap[] =
+  {
+    { TILEGX_NUM_EASY_REGS, 0 },
+    { 1, TILEGX_PC_REGNUM },
+    { 1, TILEGX_FAULTNUM_REGNUM },
+    { 0 }
+  };
 
-      if (regnum == gri || regnum == -1)
-	regcache_raw_supply (regcache, gri, ptr);
-    }
-}
+enum
+{
+  TILEGX_GREGS_SIZE = (TILEGX_NUM_EASY_REGS + 2) * tilegx_reg_size
+};
 
 /* TILE-Gx Linux kernel register set.  */
+
 static const struct regset tilegx_linux_regset =
 {
-  NULL,
-  tilegx_linux_supply_regset
+  tilegx_linux_regmap,
+  regcache_supply_regset, regcache_collect_regset
 };
 
 static const struct regset *
-- 
1.8.4.2