diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c | 63 |
1 files changed, 0 insertions, 63 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c b/sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c deleted file mode 100644 index 67880e4b28..0000000000 --- a/sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c +++ /dev/null @@ -1,63 +0,0 @@ -/* arch_prctl call for Linux/x32. - Copyright (C) 2012-2017 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 <errno.h> -#include <sys/prctl.h> -#include <sys/syscall.h> -#include <sysdep.h> -#include <stdint.h> - -/* Since x32 arch_prctl stores 32-bit base address of segment registers - %fs and %gs as unsigned 64-bit value via ARCH_GET_FS and ARCH_GET_GS, - we use an unsigned 64-bit variable to hold the base address and copy - it to ADDR after the system call returns. */ - -int -__arch_prctl (int code, uintptr_t *addr) -{ - int res; - uint64_t addr64; - void *prctl_arg = addr; - - switch (code) - { - case ARCH_GET_FS: - case ARCH_GET_GS: - prctl_arg = &addr64; - break; - } - - res = INLINE_SYSCALL (arch_prctl, 2, code, prctl_arg); - if (res == 0) - switch (code) - { - case ARCH_GET_FS: - case ARCH_GET_GS: - /* Check for a large value that overflows. */ - if ((uintptr_t) addr64 != addr64) - { - __set_errno (EOVERFLOW); - return -1; - } - *addr = (uintptr_t) addr64; - break; - } - - return res; -} -weak_alias (__arch_prctl, arch_prctl) |