diff options
Diffstat (limited to 'arch/arm64/kernel/vdso.c')
-rw-r--r-- | arch/arm64/kernel/vdso.c | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c index 60ae120..24f2e8c 100644 --- a/arch/arm64/kernel/vdso.c +++ b/arch/arm64/kernel/vdso.c @@ -121,8 +121,8 @@ static int __init vdso_init(void) } vdso_pages = (&vdso_end - &vdso_start) >> PAGE_SHIFT; - pr_info("vdso: %ld pages (%ld code, %ld data) at base %p\n", - vdso_pages + 1, vdso_pages, 1L, &vdso_start); + pr_info("vdso: %ld pages (%ld code @ %p, %ld data @ %p)\n", + vdso_pages + 1, vdso_pages, &vdso_start, 1L, vdso_data); /* Allocate the vDSO pagelist, plus a page for the data. */ vdso_pagelist = kcalloc(vdso_pages + 1, sizeof(struct page *), @@ -130,22 +130,22 @@ static int __init vdso_init(void) if (vdso_pagelist == NULL) return -ENOMEM; + /* Grab the vDSO data page. */ + vdso_pagelist[0] = virt_to_page(vdso_data); + /* Grab the vDSO code pages. */ for (i = 0; i < vdso_pages; i++) - vdso_pagelist[i] = virt_to_page(&vdso_start + i * PAGE_SIZE); - - /* Grab the vDSO data page. */ - vdso_pagelist[i] = virt_to_page(vdso_data); + vdso_pagelist[i + 1] = virt_to_page(&vdso_start + i * PAGE_SIZE); /* Populate the special mapping structures */ vdso_spec[0] = (struct vm_special_mapping) { - .name = "[vdso]", + .name = "[vvar]", .pages = vdso_pagelist, }; vdso_spec[1] = (struct vm_special_mapping) { - .name = "[vvar]", - .pages = vdso_pagelist + vdso_pages, + .name = "[vdso]", + .pages = &vdso_pagelist[1], }; return 0; @@ -169,22 +169,22 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, ret = ERR_PTR(vdso_base); goto up_fail; } - mm->context.vdso = (void *)vdso_base; - - ret = _install_special_mapping(mm, vdso_base, vdso_text_len, - VM_READ|VM_EXEC| - VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, + ret = _install_special_mapping(mm, vdso_base, PAGE_SIZE, + VM_READ|VM_MAYREAD, &vdso_spec[0]); if (IS_ERR(ret)) goto up_fail; - vdso_base += vdso_text_len; - ret = _install_special_mapping(mm, vdso_base, PAGE_SIZE, - VM_READ|VM_MAYREAD, + vdso_base += PAGE_SIZE; + mm->context.vdso = (void *)vdso_base; + ret = _install_special_mapping(mm, vdso_base, vdso_text_len, + VM_READ|VM_EXEC| + VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, &vdso_spec[1]); if (IS_ERR(ret)) goto up_fail; + up_write(&mm->mmap_sem); return 0; |