alpha: add dl-procinfo support.

Fixes glibc bug 6827.

Signed-off-by: Matt Turner <mattst88@gmail.com>

3 files changed, 144 insertions, 0 deletions

diff --git a/sysdeps/alpha/dl-machine.h b/sysdeps/alpha/dl-machine.h
index 29f500b2d0..e4a502208c 100644
--- a/sysdeps/alpha/dl-machine.h
+++ b/sysdeps/alpha/dl-machine.h
@@ -249,6 +249,18 @@ $fixup_stack:							\n\
 /* The alpha never uses Elf64_Rel relocations.  */
 #define ELF_MACHINE_NO_REL 1
 
+/* We define an initialization functions.  This is called very early in
+ *    _dl_sysdep_start.  */
+#define DL_PLATFORM_INIT dl_platform_init ()
+
+static inline void __attribute__ ((unused))
+dl_platform_init (void)
+{
+	if (GLRO(dl_platform) != NULL && *GLRO(dl_platform) == '\0')
+	/* Avoid an empty string which would disturb us.  */
+		GLRO(dl_platform) = NULL;
+}
+
 /* Fix up the instructions of a PLT entry to invoke the function
    rather than the dynamic linker.  */
 static inline Elf64_Addr
diff --git a/sysdeps/alpha/dl-procinfo.c b/sysdeps/alpha/dl-procinfo.c
new file mode 100644
index 0000000000..d280cb2f80
--- /dev/null
+++ b/sysdeps/alpha/dl-procinfo.c
@@ -0,0 +1,64 @@
+/* Data for Alpha version of processor capability information.
+   Copyright (C) 2008 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Aurelien Jarno <aurelien@aurel32.net>, 2008.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* This information must be kept in sync with the _DL_PLATFORM_COUNT
+   definitions in procinfo.h.
+
+   If anything should be added here check whether the size of each string
+   is still ok with the given array size.
+
+   All the #ifdefs in the definitions are quite irritating but
+   necessary if we want to avoid duplicating the information.  There
+   are three different modes:
+
+   - PROCINFO_DECL is defined.  This means we are only interested in
+     declarations.
+
+   - PROCINFO_DECL is not defined:
+
+     + if SHARED is defined the file is included in an array
+       initializer.  The .element = { ... } syntax is needed.
+
+     + if SHARED is not defined a normal array initialization is
+       needed.
+  */
+
+#ifndef PROCINFO_CLASS
+#define PROCINFO_CLASS
+#endif
+
+#if !defined PROCINFO_DECL && defined SHARED
+  ._dl_alpha_platforms
+#else
+PROCINFO_CLASS const char _dl_alpha_platforms[5][5]
+#endif
+#ifndef PROCINFO_DECL
+= {
+    "ev4", "ev5", "ev56", "ev6", "ev67"
+  }
+#endif
+#if !defined SHARED || defined PROCINFO_DECL
+;
+#else
+,
+#endif
+
+#undef PROCINFO_DECL
+#undef PROCINFO_CLASS
diff --git a/sysdeps/alpha/dl-procinfo.h b/sysdeps/alpha/dl-procinfo.h
new file mode 100644
index 0000000000..1372f0a2f2
--- /dev/null
+++ b/sysdeps/alpha/dl-procinfo.h
@@ -0,0 +1,68 @@
+/* Alpha version of processor capability information handling macros.
+   Copyright (C) 2008 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Aurelien Jarno <aurelien@aurel32.net>, 2008.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _DL_PROCINFO_H
+#define _DL_PROCINFO_H	1
+
+#include <ldsodefs.h>
+
+
+/* Mask to filter out platforms.  */
+#define _DL_HWCAP_PLATFORM    (-1ULL)
+
+#define _DL_PLATFORMS_COUNT   5
+
+static inline const char *
+__attribute__ ((unused))
+_dl_platform_string (int idx)
+{
+  return GLRO(dl_alpha_platforms)[idx];
+};
+
+static inline int
+__attribute__ ((unused, always_inline))
+_dl_string_platform (const char *str)
+{
+  int i;
+
+  if (str != NULL)
+    for (i = 0; i < _DL_PLATFORMS_COUNT; ++i)
+      {
+        if (strcmp (str, _dl_platform_string (i)) == 0)
+          return i;
+      }
+  return -1;
+};
+
+/* We cannot provide a general printing function.  */
+#define _dl_procinfo(word) -1
+
+/* There are no hardware capabilities defined.  */
+#define _dl_hwcap_string(idx) ""
+
+/* By default there is no important hardware capability.  */
+#define HWCAP_IMPORTANT (0)
+
+/* We don't have any hardware capabilities.  */
+#define _DL_HWCAP_COUNT	0
+
+#define _dl_string_hwcap(str) (-1)
+
+#endif /* dl-procinfo.h */