[PATCH 3/4] Tag ARM and AArch64 binaries in the ldconfig cache

[Steve McIntyre <steve.mcintyre@linaro.org>]

Again, similarly to other architectures - detect AArch64 and ARM
(soft-float and hard-float) binaries in ldconfig and tag them
appropriately. On ARM, use the new ELF flags from binutils to classify
binaries if those flags are set.

========================================================
Tag ARM and AArch64 binaries in the ldconfig cache

	* sysdeps/unix/sysv/linux/arm/readelflib.c: New file.
	* sysdeps/unix/sysv/linux/aarch64/readelflib.c: Ditto.

Signed-off-by: Steve McIntyre <steve.mcintyre@linaro.org>
---
 ports/sysdeps/unix/sysv/linux/aarch64/readelflib.c |    1 +
 ports/sysdeps/unix/sysv/linux/arm/readelflib.c     |   73 ++++++++++++++++++++
 2 files changed, 74 insertions(+)
 create mode 100644 ports/sysdeps/unix/sysv/linux/aarch64/readelflib.c
 create mode 100644 ports/sysdeps/unix/sysv/linux/arm/readelflib.c

diff --git a/ports/sysdeps/unix/sysv/linux/aarch64/readelflib.c b/ports/sysdeps/unix/sysv/linux/aarch64/readelflib.c
new file mode 100644
index 0000000..df1a822
--- /dev/null
+++ b/ports/sysdeps/unix/sysv/linux/aarch64/readelflib.c
@@ -0,0 +1 @@
+#include "ports/sysdeps/unix/sysv/linux/arm/readelflib.c"
diff --git a/ports/sysdeps/unix/sysv/linux/arm/readelflib.c b/ports/sysdeps/unix/sysv/linux/arm/readelflib.c
new file mode 100644
index 0000000..e4ba2b0
--- /dev/null
+++ b/ports/sysdeps/unix/sysv/linux/arm/readelflib.c
@@ -0,0 +1,73 @@
+/* Copyright (C) 1999-2012 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Jaeger <aj@suse.de>, 1999 and
+		  Jakub Jelinek <jakub@redhat.com>, 1999.
+
+   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/>.  */
+
+
+int process_elf32_file (const char *file_name, const char *lib, int *flag,
+			unsigned int *osversion, char **soname,
+			void *file_contents, size_t file_length);
+int process_elf64_file (const char *file_name, const char *lib, int *flag,
+			unsigned int *osversion, char **soname,
+			void *file_contents, size_t file_length);
+
+/* Returns 0 if everything is ok, != 0 in case of error.  */
+int
+process_elf_file (const char *file_name, const char *lib, int *flag,
+		  unsigned int *osversion, char **soname, void *file_contents,
+		  size_t file_length)
+{
+  ElfW(Ehdr) *elf_header = (ElfW(Ehdr) *) file_contents;
+  int ret;
+
+  if (elf_header->e_ident [EI_CLASS] == ELFCLASS32)
+    {
+      Elf32_Ehdr *elf32_header = (Elf32_Ehdr *) elf_header;
+
+      ret = process_elf32_file (file_name, lib, flag, osversion, soname,
+				file_contents, file_length);
+
+      if (!ret && EF_ARM_EABI_VERSION(elf32_header->e_flags) == EF_ARM_EABI_VER5)
+	{
+	  if (elf32_header->e_flags & EF_ARM_ABI_FLOAT_HARD)
+	    *flag = FLAG_ARM_LIBHF|FLAG_ELF_LIBC6;
+	  else if (elf32_header->e_flags & EF_ARM_ABI_FLOAT_SOFT)
+	    *flag = FLAG_ELF_LIBC6;
+	}
+    }
+  else
+    {
+      ret = process_elf64_file (file_name, lib, flag, osversion, soname,
+				file_contents, file_length);
+      /* AArch64 libraries are always libc.so.6+.  */
+      if (!ret)
+	*flag = FLAG_AARCH64_LIB64|FLAG_ELF_LIBC6;
+    }
+  return ret;
+}
+
+#undef __ELF_NATIVE_CLASS
+#undef process_elf_file
+#define process_elf_file process_elf32_file
+#define __ELF_NATIVE_CLASS 32
+#include "elf/readelflib.c"
+
+#undef __ELF_NATIVE_CLASS
+#undef process_elf_file
+#define process_elf_file process_elf64_file
+#define __ELF_NATIVE_CLASS 64
+#include "elf/readelflib.c"
-- 
1.7.10.4



Cheers,
-- 
Steve McIntyre                                steve.mcintyre@linaro.org
<http://www.linaro.org/> Linaro.org | Open source software for ARM SoCs