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authorRichard Henderson <rth@twiddle.net>2012-05-20 10:34:00 -0700
committerRichard Henderson <rth@twiddle.net>2012-05-20 10:40:35 -0700
commitc7683a6d02f3ed59f5cd119b3e8547f45a15912f (patch)
tree029e73af4f78064dc5788972d5fc3a86fc70f1d6 /misc
parenta6f1845d45d0ea9303b3c71944c0a511e23bde26 (diff)
downloadglibc-c7683a6d02f3ed59f5cd119b3e8547f45a15912f.tar.gz
Add <sys/auxv.h> and getauxval.
Diffstat (limited to 'misc')
-rw-r--r--misc/Makefile4
-rw-r--r--misc/Versions3
-rw-r--r--misc/getauxval.c36
-rw-r--r--misc/sys/auxv.h35
4 files changed, 76 insertions, 2 deletions
diff --git a/misc/Makefile b/misc/Makefile
index f42347ab9d..d1c0a02e17 100644
--- a/misc/Makefile
+++ b/misc/Makefile
@@ -31,7 +31,7 @@ headers := sys/uio.h bits/uio.h sys/ioctl.h bits/ioctls.h bits/ioctl-types.h \
regexp.h bits/select.h bits/mman.h sys/xattr.h \
syslog.h sys/syslog.h \
bits/syslog.h bits/syslog-ldbl.h bits/syslog-path.h bits/error.h \
- bits/select2.h
+ bits/select2.h bits/hwcap.h sys/auxv.h
routines := brk sbrk sstk ioctl \
readv writev preadv preadv64 pwritev pwritev64 \
@@ -64,7 +64,7 @@ routines := brk sbrk sstk ioctl \
getloadavg getclktck \
fgetxattr flistxattr fremovexattr fsetxattr getxattr \
listxattr lgetxattr llistxattr lremovexattr lsetxattr \
- removexattr setxattr
+ removexattr setxattr getauxval
generated := tst-error1.mtrace tst-error1-mem
diff --git a/misc/Versions b/misc/Versions
index 3a31c7fe62..7f525eaf5e 100644
--- a/misc/Versions
+++ b/misc/Versions
@@ -146,4 +146,7 @@ libc {
GLIBC_2.14 {
syncfs;
}
+ GLIBC_2.16 {
+ __getauxval; getauxval;
+ }
}
diff --git a/misc/getauxval.c b/misc/getauxval.c
new file mode 100644
index 0000000000..a3338eedd9
--- /dev/null
+++ b/misc/getauxval.c
@@ -0,0 +1,36 @@
+/* Copyright (C) 2012 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 <sys/auxv.h>
+#include <ldsodefs.h>
+
+
+unsigned long
+__getauxval (unsigned long type)
+{
+ ElfW(auxv_t) *p;
+
+ if (type == AT_HWCAP)
+ return GLRO(dl_hwcap);
+
+ for (p = GLRO(dl_auxv); p->a_type != AT_NULL; p++)
+ if (p->a_type == type)
+ return p->a_un.a_val;
+ return 0;
+}
+
+weak_alias (__getauxval, getauxval)
diff --git a/misc/sys/auxv.h b/misc/sys/auxv.h
new file mode 100644
index 0000000000..a70fb37f87
--- /dev/null
+++ b/misc/sys/auxv.h
@@ -0,0 +1,35 @@
+/* Access to the auxiliary vector.
+ Copyright (C) 2012 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/>. */
+
+#ifndef _SYS_AUXV_H
+#define _SYS_AUXV_H 1
+
+#include <elf.h>
+#include <bits/hwcap.h>
+
+__BEGIN_DECLS
+
+/* Return the value associated with an Elf*_auxv_t type from the auxv list
+ passed to the program on startup. If __type was not present in the auxv
+ list, returns zero. */
+extern unsigned long getauxval (unsigned long __type)
+ __THROW __attribute_const__;
+
+__END_DECLS
+
+#endif /* sys/auxv.h */