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Diffstat (limited to 'arch/x86/include/asm/vdso.h')
-rw-r--r--arch/x86/include/asm/vdso.h78
1 files changed, 33 insertions, 45 deletions
diff --git a/arch/x86/include/asm/vdso.h b/arch/x86/include/asm/vdso.h
index d1dc55404ff1..30be253dd283 100644
--- a/arch/x86/include/asm/vdso.h
+++ b/arch/x86/include/asm/vdso.h
@@ -3,63 +3,51 @@
#include <asm/page_types.h>
#include <linux/linkage.h>
+#include <linux/init.h>
-#ifdef __ASSEMBLER__
+#ifndef __ASSEMBLER__
-#define DEFINE_VDSO_IMAGE(symname, filename) \
-__PAGE_ALIGNED_DATA ; \
- .globl symname##_start, symname##_end ; \
- .align PAGE_SIZE ; \
- symname##_start: ; \
- .incbin filename ; \
- symname##_end: ; \
- .align PAGE_SIZE /* extra data here leaks to userspace. */ ; \
- \
-.previous ; \
- \
- .globl symname##_pages ; \
- .bss ; \
- .align 8 ; \
- .type symname##_pages, @object ; \
- symname##_pages: ; \
- .zero (symname##_end - symname##_start + PAGE_SIZE - 1) / PAGE_SIZE * (BITS_PER_LONG / 8) ; \
- .size symname##_pages, .-symname##_pages
+#include <linux/mm_types.h>
-#else
+struct vdso_image {
+ void *data;
+ unsigned long size; /* Always a multiple of PAGE_SIZE */
-#define DECLARE_VDSO_IMAGE(symname) \
- extern char symname##_start[], symname##_end[]; \
- extern struct page *symname##_pages[]
+ /* text_mapping.pages is big enough for data/size page pointers */
+ struct vm_special_mapping text_mapping;
-#if defined CONFIG_X86_32 || defined CONFIG_COMPAT
+ unsigned long alt, alt_len;
-#include <asm/vdso32.h>
+ unsigned long sym_end_mapping; /* Total size of the mapping */
-DECLARE_VDSO_IMAGE(vdso32_int80);
-#ifdef CONFIG_COMPAT
-DECLARE_VDSO_IMAGE(vdso32_syscall);
+ unsigned long sym_vvar_page;
+ unsigned long sym_hpet_page;
+ unsigned long sym_VDSO32_NOTE_MASK;
+ unsigned long sym___kernel_sigreturn;
+ unsigned long sym___kernel_rt_sigreturn;
+ unsigned long sym___kernel_vsyscall;
+ unsigned long sym_VDSO32_SYSENTER_RETURN;
+};
+
+#ifdef CONFIG_X86_64
+extern const struct vdso_image vdso_image_64;
+#endif
+
+#ifdef CONFIG_X86_X32
+extern const struct vdso_image vdso_image_x32;
#endif
-DECLARE_VDSO_IMAGE(vdso32_sysenter);
-/*
- * Given a pointer to the vDSO image, find the pointer to VDSO32_name
- * as that symbol is defined in the vDSO sources or linker script.
- */
-#define VDSO32_SYMBOL(base, name) \
-({ \
- extern const char VDSO32_##name[]; \
- (void __user *)(VDSO32_##name + (unsigned long)(base)); \
-})
+#if defined CONFIG_X86_32 || defined CONFIG_COMPAT
+extern const struct vdso_image vdso_image_32_int80;
+#ifdef CONFIG_COMPAT
+extern const struct vdso_image vdso_image_32_syscall;
#endif
+extern const struct vdso_image vdso_image_32_sysenter;
-/*
- * These symbols are defined with the addresses in the vsyscall page.
- * See vsyscall-sigreturn.S.
- */
-extern void __user __kernel_sigreturn;
-extern void __user __kernel_rt_sigreturn;
+extern const struct vdso_image *selected_vdso32;
+#endif
-void __init patch_vdso32(void *vdso, size_t len);
+extern void __init init_vdso_image(const struct vdso_image *image);
#endif /* __ASSEMBLER__ */