Release 4.14 arch/x86/entry/vdso/vdso32-setup.c
// SPDX-License-Identifier: GPL-2.0
/*
* (C) Copyright 2002 Linus Torvalds
* Portions based on the vdso-randomization code from exec-shield:
* Copyright(C) 2005-2006, Red Hat, Inc., Ingo Molnar
*
* This file contains the needed initializations to support sysenter.
*/
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/kernel.h>
#include <linux/mm_types.h>
#include <asm/processor.h>
#include <asm/vdso.h>
#ifdef CONFIG_COMPAT_VDSO
#define VDSO_DEFAULT 0
#else
#define VDSO_DEFAULT 1
#endif
/*
* Should the kernel map a VDSO page into processes and pass its
* address down to glibc upon exec()?
*/
unsigned int __read_mostly vdso32_enabled = VDSO_DEFAULT;
static int __init vdso32_setup(char *s)
{
vdso32_enabled = simple_strtoul(s, NULL, 0);
if (vdso32_enabled > 1) {
pr_warn("vdso32 values other than 0 and 1 are no longer allowed; vdso disabled\n");
vdso32_enabled = 0;
}
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ingo Molnar | 23 | 54.76% | 1 | 25.00% |
| Andrew Lutomirski | 13 | 30.95% | 2 | 50.00% |
| Mathias Krause | 6 | 14.29% | 1 | 25.00% |
| Total | 42 | 100.00% | 4 | 100.00% |
/*
* For consistency, the argument vdso32=[012] affects the 32-bit vDSO
* behavior on both 64-bit and 32-bit kernels.
* On 32-bit kernels, vdso=[012] means the same thing.
*/
__setup("vdso32=", vdso32_setup);
#ifdef CONFIG_X86_32
__setup_param("vdso=", vdso_setup, vdso32_setup, 0);
#endif
int __init sysenter_setup(void)
{
init_vdso_image(&vdso_image_32);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds | 10 | 58.82% | 1 | 16.67% |
| Andrew Lutomirski | 4 | 23.53% | 3 | 50.00% |
| Jeremy Fitzhardinge | 3 | 17.65% | 2 | 33.33% |
| Total | 17 | 100.00% | 6 | 100.00% |
#ifdef CONFIG_X86_64
subsys_initcall(sysenter_setup);
#ifdef CONFIG_SYSCTL
/* Register vsyscall32 into the ABI table */
#include <linux/sysctl.h>
static const int zero;
static const int one = 1;
static struct ctl_table abi_table2[] = {
{
.procname = "vsyscall32",
.data = &vdso32_enabled,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = (int *)&zero,
.extra2 = (int *)&one,
},
{}
};
static struct ctl_table abi_root_table2[] = {
{
.procname = "abi",
.mode = 0555,
.child = abi_table2
},
{}
};
static __init int ia32_binfmt_init(void)
{
register_sysctl_table(abi_root_table2);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Roland McGrath | 17 | 100.00% | 1 | 100.00% |
| Total | 17 | 100.00% | 1 | 100.00% |
__initcall(ia32_binfmt_init);
#endif /* CONFIG_SYSCTL */
#endif /* CONFIG_X86_64 */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Roland McGrath | 121 | 44.98% | 3 | 13.64% |
| Mathias Krause | 40 | 14.87% | 1 | 4.55% |
| Ingo Molnar | 35 | 13.01% | 1 | 4.55% |
| Andrew Lutomirski | 28 | 10.41% | 7 | 31.82% |
| Linus Torvalds | 20 | 7.43% | 1 | 4.55% |
| Jeremy Fitzhardinge | 14 | 5.20% | 3 | 13.64% |
| Andi Kleen | 4 | 1.49% | 1 | 4.55% |
| Stefani Seibold | 2 | 0.74% | 1 | 4.55% |
| Joe Perches | 2 | 0.74% | 1 | 4.55% |
| Jiri Slaby | 1 | 0.37% | 1 | 4.55% |
| Greg Kroah-Hartman | 1 | 0.37% | 1 | 4.55% |
| Dave Jones | 1 | 0.37% | 1 | 4.55% |
| Total | 269 | 100.00% | 22 | 100.00% |
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