1 files changed, 76 insertions, 0 deletions
diff --git a/sysdeps/powerpc/hwcapinfo.c b/sysdeps/powerpc/hwcapinfo.c
new file mode 100644
index 0000000000..a115ffccd9
--- /dev/null
+++ b/sysdeps/powerpc/hwcapinfo.c
@@ -0,0 +1,76 @@
+/* powerpc HWCAP/HWCAP2 and AT_PLATFORM data pre-processing.
+   Copyright (C) 2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <unistd.h>
+#include <shlib-compat.h>
+#include <dl-procinfo.h>
+
+uint64_t __tcb_hwcap __attribute__ ((visibility ("hidden")));
+uint32_t __tcb_platform __attribute__ ((visibility ("hidden")));
+
+/* This function parses the HWCAP/HWCAP2 fields, adding the previous supported
+   ISA bits, as well as converting the AT_PLATFORM string to a number.  This
+   data is stored in two global variables that can be used later by the
+   powerpc-specific code to store it into the TCB.  */
+void
+__tcb_parse_hwcap_and_convert_at_platform (void)
+{
+
+  uint64_t h1, h2;
+
+  /* Read AT_PLATFORM string from auxv and convert it to a number.  */
+  __tcb_platform = _dl_string_platform (GLRO (dl_platform));
+
+  /* Read HWCAP and HWCAP2 from auxv.  */
+  h1 = GLRO (dl_hwcap);
+  h2 = GLRO (dl_hwcap2);
+
+  /* hwcap contains only the latest supported ISA, the code checks which is
+     and fills the previous supported ones.  */
+
+  if (h2 & PPC_FEATURE2_ARCH_2_07)
+    h1 |= PPC_FEATURE_ARCH_2_06
+       | PPC_FEATURE_ARCH_2_05
+       | PPC_FEATURE_POWER5_PLUS
+       | PPC_FEATURE_POWER5
+       | PPC_FEATURE_POWER4;
+  else if (h1 & PPC_FEATURE_ARCH_2_06)
+    h1 |= PPC_FEATURE_ARCH_2_05
+       | PPC_FEATURE_POWER5_PLUS
+       | PPC_FEATURE_POWER5
+       | PPC_FEATURE_POWER4;
+  else if (h1 & PPC_FEATURE_ARCH_2_05)
+    h1 |= PPC_FEATURE_POWER5_PLUS
+       | PPC_FEATURE_POWER5
+       | PPC_FEATURE_POWER4;
+  else if (h1 & PPC_FEATURE_POWER5_PLUS)
+    h1 |= PPC_FEATURE_POWER5
+       | PPC_FEATURE_POWER4;
+  else if (h1 & PPC_FEATURE_POWER5)
+    h1 |= PPC_FEATURE_POWER4;
+
+  /* Consolidate both HWCAP and HWCAP2 into a single doubleword so that
+     we can read both in a single load later.  */
+  __tcb_hwcap = h2;
+  __tcb_hwcap = (h1 << 32) | __tcb_hwcap;
+
+}
+#if IS_IN (rtld)
+versioned_symbol (ld, __tcb_parse_hwcap_and_convert_at_platform, \
+		  __parse_hwcap_and_convert_at_platform, GLIBC_2_23);
+#endif