[PATCH 05/12] FRV Linux: Fill 'collect_regset' in regset structures.

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

gdb/
	* frv-linux-tdep.c (FRV_PT_PSR, FRV_PT_ISR, FRV_PT_CCR)
	(FRV_PT_CCCR, FRV_PT_LR, FRV_PT_LCR, FRV_PT_PC, FRV_PT_GNER0)
	(FRV_PT_GNER1, FRV_PT_IACC0H, FRV_PT_IACC0L, FRV_PT_GR)
	(FRV_PT_TBR, FRV_PT_GR, FRV_PT_EXEC_FDPIC_LOADMAP)
	(FRV_PT_INTERP_FDPIC_LOADMAP): Delete macros.
	(frv_linux_gregmap, frv_linux_fpregmap): New register maps.
	(frv_linux_supply_gregset): Replace main logic by call to
	regcache_supply_regset, but keep clearing gr32-gr63.
	(frv_linux_supply_fpregset): Delete function.
	(frv_linux_gregset): Refer to appropriate register map and add
	regcache_collect_regset as the collect method.
	(frv_linux_fpregset): Likewise.  Also exchange the supply method
	by regcache_supply_regset.
---
 gdb/frv-linux-tdep.c | 141 ++++++++++++++++++++-------------------------------
 1 file changed, 54 insertions(+), 87 deletions(-)

diff --git a/gdb/frv-linux-tdep.c b/gdb/frv-linux-tdep.c
index fb163a8..104e6c1 100644
--- a/gdb/frv-linux-tdep.c
+++ b/gdb/frv-linux-tdep.c
@@ -360,37 +360,52 @@ typedef struct
   frv_elf_fpreg_t fsr[1];
 } frv_elf_fpregset_t;
 
-/* Constants for accessing elements of frv_elf_gregset_t.  */
-
-#define FRV_PT_PSR 0
-#define	FRV_PT_ISR 1
-#define FRV_PT_CCR 2
-#define FRV_PT_CCCR 3
-#define FRV_PT_LR 4
-#define FRV_PT_LCR 5
-#define FRV_PT_PC 6
-#define FRV_PT_GNER0 10
-#define FRV_PT_GNER1 11
-#define FRV_PT_IACC0H 12
-#define FRV_PT_IACC0L 13
-
-/* Note: Only 32 of the GRs will be found in the corefile.  */
-#define FRV_PT_GR(j)	( 14 + (j))	/* GRj for 0<=j<=63.  */
-
-#define FRV_PT_TBR FRV_PT_GR(0)		/* gr0 is always 0, so TBR is stuffed
-					   there.  */
-
-/* Technically, the loadmap addresses are not part of `pr_reg' as
-   found in the elf_prstatus struct.  The fields which communicate the
-   loadmap address appear (by design) immediately after `pr_reg'
-   though, and the BFD function elf32_frv_grok_prstatus() has been
-   implemented to include these fields in the register section that it
-   extracts from the core file.  So, for our purposes, they may be
-   viewed as registers.  */
-
-#define FRV_PT_EXEC_FDPIC_LOADMAP 46
-#define FRV_PT_INTERP_FDPIC_LOADMAP 47
-
+/* Register maps.  */
+
+static const struct regcache_map_entry frv_linux_gregmap[] =
+  {
+    { 1, psr_regnum },
+    { 4, REGCACHE_MAP_SKIP_BYTES }, /* isr */
+    { 1, ccr_regnum },
+    { 1, cccr_regnum },
+    { 1, lr_regnum },
+    { 1, lcr_regnum },
+    { 1, pc_regnum },
+    { 4, REGCACHE_MAP_SKIP_BYTES }, /* __status */
+    { 4, REGCACHE_MAP_SKIP_BYTES }, /* syscallno */
+    { 4, REGCACHE_MAP_SKIP_BYTES }, /* orig_gr8 */
+    { 1, gner0_regnum },
+    { 1, gner1_regnum },
+    { 8, REGCACHE_MAP_SKIP_BYTES }, /* iacc0 */
+    { 1, tbr_regnum },
+    { 31, first_gpr_regnum + 1 }, /* gr1 ... gr31 */
+
+    /* Technically, the loadmap addresses are not part of `pr_reg' as
+       found in the elf_prstatus struct.  The fields which communicate
+       the loadmap address appear (by design) immediately after
+       `pr_reg' though, and the BFD function elf32_frv_grok_prstatus()
+       has been implemented to include these fields in the register
+       section that it extracts from the core file.  So, for our
+       purposes, they may be viewed as registers.  */
+
+    { 1, fdpic_loadmap_exec_regnum },
+    { 1, fdpic_loadmap_interp_regnum },
+    { 0 }
+  };
+
+static const struct regcache_map_entry frv_linux_fpregmap[] =
+  {
+    { 64, first_fpr_regnum },	/* fr0 ... fr63 */
+    { 1, fner0_regnum },
+    { 1, fner1_regnum },
+    { 1, msr0_regnum },
+    { 1, msr1_regnum },
+    { 8, acc0_regnum },		/* acc0 ... acc7 */
+    { 1, accg0123_regnum },
+    { 1, accg4567_regnum },
+    { 1, fsr0_regnum },
+    { 0 }
+  };
 
 /* Unpack an frv_elf_gregset_t into GDB's register cache.  */
 
@@ -401,7 +416,6 @@ frv_linux_supply_gregset (const struct regset *regset,
 {
   int regi;
   char zerobuf[MAX_REGISTER_SIZE];
-  const frv_elf_gregset_t *gregsetp = gregs;
 
   memset (zerobuf, 0, MAX_REGISTER_SIZE);
 
@@ -409,72 +423,25 @@ frv_linux_supply_gregset (const struct regset *regset,
      this slot.  */
   regcache_raw_supply (regcache, first_gpr_regnum, zerobuf);
 
-  for (regi = first_gpr_regnum + 1; regi <= last_gpr_regnum; regi++)
-    {
-      if (regi >= first_gpr_regnum + 32)
-	regcache_raw_supply (regcache, regi, zerobuf);
-      else
-	regcache_raw_supply (regcache, regi,
-			     gregsetp->reg[FRV_PT_GR (regi
-						      - first_gpr_regnum)]);
-    }
-
-  regcache_raw_supply (regcache, pc_regnum, gregsetp->reg[FRV_PT_PC]);
-  regcache_raw_supply (regcache, psr_regnum, gregsetp->reg[FRV_PT_PSR]);
-  regcache_raw_supply (regcache, ccr_regnum, gregsetp->reg[FRV_PT_CCR]);
-  regcache_raw_supply (regcache, cccr_regnum, gregsetp->reg[FRV_PT_CCCR]);
-  regcache_raw_supply (regcache, lr_regnum, gregsetp->reg[FRV_PT_LR]);
-  regcache_raw_supply (regcache, lcr_regnum, gregsetp->reg[FRV_PT_LCR]);
-  regcache_raw_supply (regcache, gner0_regnum, gregsetp->reg[FRV_PT_GNER0]);
-  regcache_raw_supply (regcache, gner1_regnum, gregsetp->reg[FRV_PT_GNER1]);
-  regcache_raw_supply (regcache, tbr_regnum, gregsetp->reg[FRV_PT_TBR]);
-  regcache_raw_supply (regcache, fdpic_loadmap_exec_regnum,
-                       gregsetp->reg[FRV_PT_EXEC_FDPIC_LOADMAP]);
-  regcache_raw_supply (regcache, fdpic_loadmap_interp_regnum,
-                       gregsetp->reg[FRV_PT_INTERP_FDPIC_LOADMAP]);
-}
-
-/* Unpack an frv_elf_fpregset_t into GDB's register cache.  */
-
-static void
-frv_linux_supply_fpregset (const struct regset *regset,
-                           struct regcache *regcache,
-			   int regnum, const void *gregs, size_t len)
-{
-  int regi;
-  const frv_elf_fpregset_t *fpregsetp = gregs;
-
-  for (regi = first_fpr_regnum; regi <= last_fpr_regnum; regi++)
-    regcache_raw_supply (regcache, regi,
-			 fpregsetp->fr[regi - first_fpr_regnum]);
-
-  regcache_raw_supply (regcache, fner0_regnum, fpregsetp->fner[0]);
-  regcache_raw_supply (regcache, fner1_regnum, fpregsetp->fner[1]);
-
-  regcache_raw_supply (regcache, msr0_regnum, fpregsetp->msr[0]);
-  regcache_raw_supply (regcache, msr1_regnum, fpregsetp->msr[1]);
+  /* Fill gr32, ..., gr63 with zeros. */
+  for (regi = first_gpr_regnum + 32; regi <= last_gpr_regnum; regi++)
+    regcache_raw_supply (regcache, regi, zerobuf);
 
-  for (regi = acc0_regnum; regi <= acc7_regnum; regi++)
-    regcache_raw_supply (regcache, regi, fpregsetp->acc[regi - acc0_regnum]);
-
-  regcache_raw_supply (regcache, accg0123_regnum, fpregsetp->accg);
-  regcache_raw_supply (regcache, accg4567_regnum, fpregsetp->accg + 4);
-
-  regcache_raw_supply (regcache, fsr0_regnum, fpregsetp->fsr[0]);
+  regcache_supply_regset (regset, regcache, regnum, gregs, len);
 }
 
 /* FRV Linux kernel register sets.  */
 
 static const struct regset frv_linux_gregset =
 {
-  NULL,
-  frv_linux_supply_gregset
+  frv_linux_gregmap,
+  frv_linux_supply_gregset, regcache_collect_regset
 };
 
 static const struct regset frv_linux_fpregset =
 {
-  NULL,
-  frv_linux_supply_fpregset
+  frv_linux_fpregmap,
+  regcache_supply_regset, regcache_collect_regset
 };
 
 static const struct regset *
-- 
1.8.4.2