mirror of
https://sourceware.org/git/glibc.git
synced 2024-09-20 16:40:54 +00:00
Add x32 arch_prctl
This commit is contained in:
parent
31a39bd841
commit
da0331a873
@ -1,5 +1,9 @@
|
|||||||
2012-05-22 H.J. Lu <hongjiu.lu@intel.com>
|
2012-05-22 H.J. Lu <hongjiu.lu@intel.com>
|
||||||
|
|
||||||
|
* sysdeps/unix/sysv/linux/x86_64/x32/Makefile (sysdep_routines):
|
||||||
|
Add arch_prctl.
|
||||||
|
* sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c: New file.
|
||||||
|
|
||||||
* sysdeps/unix/sysv/linux/wordsize-64/posix_fallocate.c
|
* sysdeps/unix/sysv/linux/wordsize-64/posix_fallocate.c
|
||||||
(posix_fallocate): Use INTERNAL_SYSCALL_TYPES if it is defined.
|
(posix_fallocate): Use INTERNAL_SYSCALL_TYPES if it is defined.
|
||||||
* sysdeps/unix/sysv/linux/x86_64/sysdep.h (INLINE_SYSCALL_TYPES):
|
* sysdeps/unix/sysv/linux/x86_64/sysdep.h (INLINE_SYSCALL_TYPES):
|
||||||
|
@ -1,3 +1,7 @@
|
|||||||
|
ifeq ($(subdir),misc)
|
||||||
|
sysdep_routines += arch_prctl
|
||||||
|
endif
|
||||||
|
|
||||||
ifeq ($(subdir),posix)
|
ifeq ($(subdir),posix)
|
||||||
sysdep_routines += getcpu sched_getcpu-static
|
sysdep_routines += getcpu sched_getcpu-static
|
||||||
endif
|
endif
|
||||||
|
62
sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c
Normal file
62
sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c
Normal file
@ -0,0 +1,62 @@
|
|||||||
|
/* arch_prctl call for Linux/x32.
|
||||||
|
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 <errno.h>
|
||||||
|
#include <sys/prctl.h>
|
||||||
|
#include <sys/syscall.h>
|
||||||
|
#include <sysdep.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)
|
Loading…
Reference in New Issue
Block a user