[PATCH 17/17] [PowerPC] Add gdbserver support for EBB and PMU registers

[Pedro Franco de Carvalho <pedromfc@linux.ibm.com>]

This patch extends support for EBB and PMU registers to the powerpc
linux gdbserver stub.

gdb/gdbserver/ChangeLog:
YYYY-MM-DD  Pedro Franco de Carvalho  <pedromfc@linux.ibm.com>

	* linux-ppc-low.c (ppc_store_ebbregset, ppc_store_pmuregset): New
	functions.
	(ppc_regsets): Add entries for ebb and pmu regsets.
	(ppc_arch_setup): Set isa207 in features struct if the ebb and pmu
	regsets are available. Set sizes for these regsets.
---
 gdb/gdbserver/linux-ppc-low.c | 50 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 49 insertions(+), 1 deletion(-)

diff --git a/gdb/gdbserver/linux-ppc-low.c b/gdb/gdbserver/linux-ppc-low.c
index 2c830d638a..9d1845088b 100644
--- a/gdb/gdbserver/linux-ppc-low.c
+++ b/gdb/gdbserver/linux-ppc-low.c
@@ -526,6 +526,38 @@ ppc_store_tarregset (struct regcache *regcache, const void *buf)
 }
 
 static void
+ppc_store_ebbregset (struct regcache *regcache, const void *buf)
+{
+  int base;
+  char *regset = (char *) buf;
+
+  base = find_regno (regcache->tdesc, "bescr");
+
+  /* The order in the kernel regset is: EBBRR, EBBHR, BESCR, in our
+     .dat file it is BESCR, EBBHR, EBBRR.  */
+  supply_register (regcache, base, &regset[16]);
+  supply_register (regcache, base + 1, &regset[8]);
+  supply_register (regcache, base + 2, &regset[0]);
+}
+
+static void
+ppc_store_pmuregset (struct regcache *regcache, const void *buf)
+{
+  int base;
+  char *regset = (char *) buf;
+
+  base = find_regno (regcache->tdesc, "mmcr0");
+
+  /* The order in the kernel regset is SIAR, SDAR, SIER, MMCR2, MMCR0.
+     In the .dat file is MMCR0, MMCR2, SIAR, SDAR, SIER.  */
+  supply_register (regcache, base, &regset[32]);
+  supply_register (regcache, base + 1, &regset[24]);
+  supply_register (regcache, base + 2, &regset[0]);
+  supply_register (regcache, base + 3, &regset[8]);
+  supply_register (regcache, base + 4, &regset[16]);
+}
+
+static void
 ppc_fill_tm_sprregset (struct regcache *regcache, void *buf)
 {
   int i, base;
@@ -775,6 +807,10 @@ static struct regset_info ppc_regsets[] = {
     NULL, ppc_store_tm_cgprregset },
   { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_TM_SPR, 0, EXTENDED_REGS,
     ppc_fill_tm_sprregset, ppc_store_tm_sprregset },
+  { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_EBB, 0, EXTENDED_REGS,
+    NULL, ppc_store_ebbregset },
+  { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_PMU, 0, EXTENDED_REGS,
+    NULL, ppc_store_pmuregset },
   { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_TAR, 0, EXTENDED_REGS,
   ppc_fill_tarregset, ppc_store_tarregset },
   { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_PPR, 0, EXTENDED_REGS,
@@ -856,7 +892,11 @@ ppc_arch_setup (void)
       if ((ppc_hwcap2 & PPC_FEATURE2_ARCH_2_07)
 	  && (ppc_hwcap2 & PPC_FEATURE2_TAR)
 	  && ppc_check_regset (tid, NT_PPC_TAR,
-			       PPC_LINUX_SIZEOF_TARREGSET))
+			       PPC_LINUX_SIZEOF_TARREGSET)
+	  && ppc_check_regset (tid, NT_PPC_EBB,
+			       PPC_LINUX_SIZEOF_EBBREGSET)
+	  && ppc_check_regset (tid, NT_PPC_PMU,
+			       PPC_LINUX_SIZEOF_PMUREGSET))
 	{
 	  features.isa207 = true;
 	  if ((ppc_hwcap2 & PPC_FEATURE2_HTM)
@@ -925,6 +965,14 @@ ppc_arch_setup (void)
 	    regset->size = (features.isa207 ?
 			    PPC_LINUX_SIZEOF_TARREGSET : 0);
 	    break;
+	  case NT_PPC_EBB:
+	    regset->size = (features.isa207 ?
+			    PPC_LINUX_SIZEOF_EBBREGSET : 0);
+	    break;
+	  case NT_PPC_PMU:
+	    regset->size = (features.isa207 ?
+			    PPC_LINUX_SIZEOF_PMUREGSET : 0);
+	    break;
 	  case NT_PPC_TM_SPR:
 	    regset->size = (features.htm ?
 			    PPC_LINUX_SIZEOF_TM_SPRREGSET : 0);
-- 
2.13.6