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Diffstat (limited to 'arch/powerpc/kernel/vdso.c')
-rw-r--r--arch/powerpc/kernel/vdso.c135
1 files changed, 60 insertions, 75 deletions
diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index 305eb0d9b768..b457bfa28436 100644
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c
@@ -49,13 +49,16 @@
/* The alignment of the vDSO */
#define VDSO_ALIGNMENT (1 << 16)
-extern char vdso32_start, vdso32_end;
-static void *vdso32_kbase = &vdso32_start;
static unsigned int vdso32_pages;
+static void *vdso32_kbase;
static struct page **vdso32_pagelist;
unsigned long vdso32_sigtramp;
unsigned long vdso32_rt_sigtramp;
+#ifdef CONFIG_VDSO32
+extern char vdso32_start, vdso32_end;
+#endif
+
#ifdef CONFIG_PPC64
extern char vdso64_start, vdso64_end;
static void *vdso64_kbase = &vdso64_start;
@@ -140,50 +143,6 @@ struct lib64_elfinfo
};
-#ifdef __DEBUG
-static void dump_one_vdso_page(struct page *pg, struct page *upg)
-{
- printk("kpg: %p (c:%d,f:%08lx)", __va(page_to_pfn(pg) << PAGE_SHIFT),
- page_count(pg),
- pg->flags);
- if (upg && !IS_ERR(upg) /* && pg != upg*/) {
- printk(" upg: %p (c:%d,f:%08lx)", __va(page_to_pfn(upg)
- << PAGE_SHIFT),
- page_count(upg),
- upg->flags);
- }
- printk("\n");
-}
-
-static void dump_vdso_pages(struct vm_area_struct * vma)
-{
- int i;
-
- if (!vma || is_32bit_task()) {
- printk("vDSO32 @ %016lx:\n", (unsigned long)vdso32_kbase);
- for (i=0; i<vdso32_pages; i++) {
- struct page *pg = virt_to_page(vdso32_kbase +
- i*PAGE_SIZE);
- struct page *upg = (vma && vma->vm_mm) ?
- follow_page(vma, vma->vm_start + i*PAGE_SIZE, 0)
- : NULL;
- dump_one_vdso_page(pg, upg);
- }
- }
- if (!vma || !is_32bit_task()) {
- printk("vDSO64 @ %016lx:\n", (unsigned long)vdso64_kbase);
- for (i=0; i<vdso64_pages; i++) {
- struct page *pg = virt_to_page(vdso64_kbase +
- i*PAGE_SIZE);
- struct page *upg = (vma && vma->vm_mm) ?
- follow_page(vma, vma->vm_start + i*PAGE_SIZE, 0)
- : NULL;
- dump_one_vdso_page(pg, upg);
- }
- }
-}
-#endif /* DEBUG */
-
/*
* This is called from binfmt_elf, we create the special vma for the
* vDSO and insert it into the mm struct tree
@@ -292,6 +251,7 @@ const char *arch_vma_name(struct vm_area_struct *vma)
+#ifdef CONFIG_VDSO32
static void * __init find_section32(Elf32_Ehdr *ehdr, const char *secname,
unsigned long *size)
{
@@ -379,6 +339,20 @@ static int __init vdso_do_func_patch32(struct lib32_elfinfo *v32,
return 0;
}
+#else /* !CONFIG_VDSO32 */
+static unsigned long __init find_function32(struct lib32_elfinfo *lib,
+ const char *symname)
+{
+ return 0;
+}
+
+static int __init vdso_do_func_patch32(struct lib32_elfinfo *v32,
+ struct lib64_elfinfo *v64,
+ const char *orig, const char *fix)
+{
+ return 0;
+}
+#endif /* CONFIG_VDSO32 */
#ifdef CONFIG_PPC64
@@ -489,6 +463,7 @@ static __init int vdso_do_find_sections(struct lib32_elfinfo *v32,
* Locate symbol tables & text section
*/
+#ifdef CONFIG_VDSO32
v32->dynsym = find_section32(v32->hdr, ".dynsym", &v32->dynsymsize);
v32->dynstr = find_section32(v32->hdr, ".dynstr", NULL);
if (v32->dynsym == NULL || v32->dynstr == NULL) {
@@ -501,6 +476,7 @@ static __init int vdso_do_find_sections(struct lib32_elfinfo *v32,
return -1;
}
v32->text = sect - vdso32_kbase;
+#endif
#ifdef CONFIG_PPC64
v64->dynsym = find_section64(v64->hdr, ".dynsym", &v64->dynsymsize);
@@ -537,7 +513,9 @@ static __init void vdso_setup_trampolines(struct lib32_elfinfo *v32,
static __init int vdso_fixup_datapage(struct lib32_elfinfo *v32,
struct lib64_elfinfo *v64)
{
+#ifdef CONFIG_VDSO32
Elf32_Sym *sym32;
+#endif
#ifdef CONFIG_PPC64
Elf64_Sym *sym64;
@@ -552,6 +530,7 @@ static __init int vdso_fixup_datapage(struct lib32_elfinfo *v32,
(sym64->st_value - VDSO64_LBASE);
#endif /* CONFIG_PPC64 */
+#ifdef CONFIG_VDSO32
sym32 = find_symbol32(v32, "__kernel_datapage_offset");
if (sym32 == NULL) {
printk(KERN_ERR "vDSO32: Can't find symbol "
@@ -561,6 +540,7 @@ static __init int vdso_fixup_datapage(struct lib32_elfinfo *v32,
*((int *)(vdso32_kbase + (sym32->st_value - VDSO32_LBASE))) =
(vdso32_pages << PAGE_SHIFT) -
(sym32->st_value - VDSO32_LBASE);
+#endif
return 0;
}
@@ -569,55 +549,54 @@ static __init int vdso_fixup_datapage(struct lib32_elfinfo *v32,
static __init int vdso_fixup_features(struct lib32_elfinfo *v32,
struct lib64_elfinfo *v64)
{
- void *start32;
- unsigned long size32;
+ unsigned long size;
+ void *start;
#ifdef CONFIG_PPC64
- void *start64;
- unsigned long size64;
-
- start64 = find_section64(v64->hdr, "__ftr_fixup", &size64);
- if (start64)
+ start = find_section64(v64->hdr, "__ftr_fixup", &size);
+ if (start)
do_feature_fixups(cur_cpu_spec->cpu_features,
- start64, start64 + size64);
+ start, start + size);
- start64 = find_section64(v64->hdr, "__mmu_ftr_fixup", &size64);
- if (start64)
+ start = find_section64(v64->hdr, "__mmu_ftr_fixup", &size);
+ if (start)
do_feature_fixups(cur_cpu_spec->mmu_features,
- start64, start64 + size64);
+ start, start + size);
- start64 = find_section64(v64->hdr, "__fw_ftr_fixup", &size64);
- if (start64)
+ start = find_section64(v64->hdr, "__fw_ftr_fixup", &size);
+ if (start)
do_feature_fixups(powerpc_firmware_features,
- start64, start64 + size64);
+ start, start + size);
- start64 = find_section64(v64->hdr, "__lwsync_fixup", &size64);
- if (start64)
+ start = find_section64(v64->hdr, "__lwsync_fixup", &size);
+ if (start)
do_lwsync_fixups(cur_cpu_spec->cpu_features,
- start64, start64 + size64);
+ start, start + size);
#endif /* CONFIG_PPC64 */
- start32 = find_section32(v32->hdr, "__ftr_fixup", &size32);
- if (start32)
+#ifdef CONFIG_VDSO32
+ start = find_section32(v32->hdr, "__ftr_fixup", &size);
+ if (start)
do_feature_fixups(cur_cpu_spec->cpu_features,
- start32, start32 + size32);
+ start, start + size);
- start32 = find_section32(v32->hdr, "__mmu_ftr_fixup", &size32);
- if (start32)
+ start = find_section32(v32->hdr, "__mmu_ftr_fixup", &size);
+ if (start)
do_feature_fixups(cur_cpu_spec->mmu_features,
- start32, start32 + size32);
+ start, start + size);
#ifdef CONFIG_PPC64
- start32 = find_section32(v32->hdr, "__fw_ftr_fixup", &size32);
- if (start32)
+ start = find_section32(v32->hdr, "__fw_ftr_fixup", &size);
+ if (start)
do_feature_fixups(powerpc_firmware_features,
- start32, start32 + size32);
+ start, start + size);
#endif /* CONFIG_PPC64 */
- start32 = find_section32(v32->hdr, "__lwsync_fixup", &size32);
- if (start32)
+ start = find_section32(v32->hdr, "__lwsync_fixup", &size);
+ if (start)
do_lwsync_fixups(cur_cpu_spec->cpu_features,
- start32, start32 + size32);
+ start, start + size);
+#endif
return 0;
}
@@ -779,11 +758,15 @@ static int __init vdso_init(void)
#endif /* CONFIG_PPC64 */
+#ifdef CONFIG_VDSO32
+ vdso32_kbase = &vdso32_start;
+
/*
* Calculate the size of the 32 bits vDSO
*/
vdso32_pages = (&vdso32_end - &vdso32_start) >> PAGE_SHIFT;
DBG("vdso32_kbase: %p, 0x%x pages\n", vdso32_kbase, vdso32_pages);
+#endif
/*
@@ -804,6 +787,7 @@ static int __init vdso_init(void)
return 0;
}
+#ifdef CONFIG_VDSO32
/* Make sure pages are in the correct state */
vdso32_pagelist = kzalloc(sizeof(struct page *) * (vdso32_pages + 2),
GFP_KERNEL);
@@ -816,6 +800,7 @@ static int __init vdso_init(void)
}
vdso32_pagelist[i++] = virt_to_page(vdso_data);
vdso32_pagelist[i] = NULL;
+#endif
#ifdef CONFIG_PPC64
vdso64_pagelist = kzalloc(sizeof(struct page *) * (vdso64_pages + 2),
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.