int __init sysenter_setup(void)
{
char *vdso32_start, *vdso32_end;
int npages, i;
#ifdef CONFIG_COMPAT
if (vdso32_syscall()) {
vdso32_start = vdso32_syscall_start;
vdso32_end = vdso32_syscall_end;
vdso32_pages = vdso32_syscall_pages;
} else
#endif
if (vdso32_sysenter()) {
vdso32_start = vdso32_sysenter_start;
vdso32_end = vdso32_sysenter_end;
vdso32_pages = vdso32_sysenter_pages;
} else {
vdso32_start = vdso32_int80_start;
vdso32_end = vdso32_int80_end;
vdso32_pages = vdso32_int80_pages;
}
npages = ((vdso32_end - vdso32_start) + PAGE_SIZE - 1) / PAGE_SIZE;
vdso32_size = npages << PAGE_SHIFT;
for (i = 0; i < npages; i++)
vdso32_pages[i] = virt_to_page(vdso32_start + i*PAGE_SIZE);
patch_vdso32(vdso32_start, vdso32_size);
return 0;
}
int __init sysenter_setup(void)
{
void *syscall_page = (void *)get_zeroed_page(GFP_ATOMIC);
const void *vsyscall;
size_t vsyscall_len;
vdso32_pages[0] = virt_to_page(syscall_page);
#ifdef CONFIG_X86_32
gate_vma_init();
#endif
if (vdso32_syscall()) {
vsyscall = &vdso32_syscall_start;
vsyscall_len = &vdso32_syscall_end - &vdso32_syscall_start;
} else if (vdso32_sysenter()) {
vsyscall = &vdso32_sysenter_start;
vsyscall_len = &vdso32_sysenter_end - &vdso32_sysenter_start;
} else {
vsyscall = &vdso32_int80_start;
vsyscall_len = &vdso32_int80_end - &vdso32_int80_start;
}
memcpy(syscall_page, vsyscall, vsyscall_len);
relocate_vdso(syscall_page);
return 0;
}
int __init sysenter_setup(void)
{
#ifdef CONFIG_COMPAT
if (vdso32_syscall())
selected_vdso32 = &vdso_image_32_syscall;
else
#endif
if (vdso32_sysenter())
selected_vdso32 = &vdso_image_32_sysenter;
else
selected_vdso32 = &vdso_image_32_int80;
init_vdso_image(selected_vdso32);
return 0;
}