[PATCH v2 01/13] Rename 'descr' field in regset structure to 'regmap'.

[Andreas Arnez <arnez@linux.vnet.ibm.com>]

The regset structure's 'descr' field is intended to represent some
kind of "register map".  Thus, before making more use of it, this
change renames it to 'regmap' and adjusts the comment appropriately.

(See: https://sourceware.org/ml/gdb-patches/2014-05/msg00664.html)

gdb/
	* regset.h (struct regset): Rename 'descr' field to 'regmap'.
	* ppc-linux-tdep.c (ppc_linux_supply_gregset)
	(ppc_linux_collect_gregset ): Likewise.
	* rs6000-tdep.c (ppc_supply_gregset, ppc_supply_fpregset)
	(ppc_supply_vrregset, ppc_collect_gregset, ppc_collect_fpregset)
	(ppc_collect_vrregset): Likewise.
	* s390-linux-tdep.c (s390_supply_regset, s390_collect_regset):
	Likewise.
---
 gdb/ppc-linux-tdep.c  |  4 ++--
 gdb/regset.h          |  7 ++++---
 gdb/rs6000-tdep.c     | 12 ++++++------
 gdb/s390-linux-tdep.c |  4 ++--
 4 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/gdb/ppc-linux-tdep.c b/gdb/ppc-linux-tdep.c
index 5410554..f443f55 100644
--- a/gdb/ppc-linux-tdep.c
+++ b/gdb/ppc-linux-tdep.c
@@ -395,7 +395,7 @@ ppc_linux_supply_gregset (const struct regset *regset,
 			  struct regcache *regcache,
 			  int regnum, const void *gregs, size_t len)
 {
-  const struct ppc_reg_offsets *offsets = regset->descr;
+  const struct ppc_reg_offsets *offsets = regset->regmap;
 
   ppc_supply_gregset (regset, regcache, regnum, gregs, len);
 
@@ -420,7 +420,7 @@ ppc_linux_collect_gregset (const struct regset *regset,
 			   const struct regcache *regcache,
 			   int regnum, void *gregs, size_t len)
 {
-  const struct ppc_reg_offsets *offsets = regset->descr;
+  const struct ppc_reg_offsets *offsets = regset->regmap;
 
   /* Clear areas in the linux gregset not written elsewhere.  */
   if (regnum == -1)
diff --git a/gdb/regset.h b/gdb/regset.h
index 03dbdaa..37ed99a 100644
--- a/gdb/regset.h
+++ b/gdb/regset.h
@@ -41,9 +41,10 @@ typedef void (collect_regset_ftype) (const struct regset *,
 
 struct regset
 {
-  /* Data pointer for private use by the methods below, presumably
-     providing some sort of description of the register set.  */
-  const void *descr;
+  /* Pointer to a "register map", for private use by the methods
+     below.  Typically describes how the regset's registers are
+     arranged in the buffer collected to or supplied from.  */
+  const void *regmap;
 
   /* Function supplying values in a register set to a register cache.  */
   supply_regset_ftype *supply_regset;
diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c
index c4ce51c..85919e4 100644
--- a/gdb/rs6000-tdep.c
+++ b/gdb/rs6000-tdep.c
@@ -506,7 +506,7 @@ ppc_supply_gregset (const struct regset *regset, struct regcache *regcache,
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-  const struct ppc_reg_offsets *offsets = regset->descr;
+  const struct ppc_reg_offsets *offsets = regset->regmap;
   size_t offset;
   int regsize;
 
@@ -558,7 +558,7 @@ ppc_supply_fpregset (const struct regset *regset, struct regcache *regcache,
     return;
 
   tdep = gdbarch_tdep (gdbarch);
-  offsets = regset->descr;
+  offsets = regset->regmap;
   if (regnum == -1)
     {
       int i;
@@ -626,7 +626,7 @@ ppc_supply_vrregset (const struct regset *regset, struct regcache *regcache,
     return;
 
   tdep = gdbarch_tdep (gdbarch);
-  offsets = regset->descr;
+  offsets = regset->regmap;
   if (regnum == -1)
     {
       int i;
@@ -665,7 +665,7 @@ ppc_collect_gregset (const struct regset *regset,
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-  const struct ppc_reg_offsets *offsets = regset->descr;
+  const struct ppc_reg_offsets *offsets = regset->regmap;
   size_t offset;
   int regsize;
 
@@ -719,7 +719,7 @@ ppc_collect_fpregset (const struct regset *regset,
     return;
 
   tdep = gdbarch_tdep (gdbarch);
-  offsets = regset->descr;
+  offsets = regset->regmap;
   if (regnum == -1)
     {
       int i;
@@ -792,7 +792,7 @@ ppc_collect_vrregset (const struct regset *regset,
     return;
 
   tdep = gdbarch_tdep (gdbarch);
-  offsets = regset->descr;
+  offsets = regset->regmap;
   if (regnum == -1)
     {
       int i;
diff --git a/gdb/s390-linux-tdep.c b/gdb/s390-linux-tdep.c
index ea743b5..3658033 100644
--- a/gdb/s390-linux-tdep.c
+++ b/gdb/s390-linux-tdep.c
@@ -610,7 +610,7 @@ s390_supply_regset (const struct regset *regset, struct regcache *regcache,
 		    int regnum, const void *regs, size_t len)
 {
   const short *map;
-  for (map = regset->descr; map[0] >= 0; map += 2)
+  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);
@@ -643,7 +643,7 @@ s390_collect_regset (const struct regset *regset,
 		     int regnum, void *regs, size_t len)
 {
   const short *map;
-  for (map = regset->descr; map[0] >= 0; map += 2)
+  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]);
 }
-- 
1.8.4.2