From c7683a6d02f3ed59f5cd119b3e8547f45a15912f Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Sun, 20 May 2012 10:34:00 -0700 Subject: Add and getauxval. --- misc/Makefile | 4 ++-- misc/Versions | 3 +++ misc/getauxval.c | 36 ++++++++++++++++++++++++++++++++++++ misc/sys/auxv.h | 35 +++++++++++++++++++++++++++++++++++ 4 files changed, 76 insertions(+), 2 deletions(-) create mode 100644 misc/getauxval.c create mode 100644 misc/sys/auxv.h (limited to 'misc') 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 + . */ + +#include +#include + + +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 + . */ + +#ifndef _SYS_AUXV_H +#define _SYS_AUXV_H 1 + +#include +#include + +__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 */ -- cgit 1.4.1