x86, vdso: Move more vdso definitions into vdso.h

This fixes the Xen build and gets rid of a silly header file.

Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: Stefani Seibold <stefani@seibold.net>
Link: http://lkml.kernel.org/r/1df77311795aff75f5742c787d277518314a38d3.1395366931.git.luto@amacapital.net
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/arch/x86/include/asm/vdso.h b/arch/x86/include/asm/vdso.h
index 0301d78bb910..7622a65a969e 100644
--- a/arch/x86/include/asm/vdso.h
+++ b/arch/x86/include/asm/vdso.h
@@ -1,10 +1,46 @@
 #ifndef _ASM_X86_VDSO_H
 #define _ASM_X86_VDSO_H
 
+#include <asm/page_types.h>
+#include <linux/linkage.h>
+
+#ifdef __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
+
+#else
+
+#define DECLARE_VDSO_IMAGE(symname)                             \
+        extern char symname##_start[], symname##_end[];         \
+        extern struct page *symname##_pages[]
+
 #if defined CONFIG_X86_32 || defined CONFIG_COMPAT
 
 #include <asm/vdso32.h>
 
+DECLARE_VDSO_IMAGE(vdso32_int80);
+#ifdef CONFIG_COMPAT
+DECLARE_VDSO_IMAGE(vdso32_syscall);
+#endif
+DECLARE_VDSO_IMAGE(vdso32_sysenter);
+
 extern const char VDSO32_PRELINK[];
 
 /*
@@ -27,4 +63,6 @@ extern void __user __kernel_rt_sigreturn;
 
 void __init patch_vdso32(void *vdso, size_t len);
 
+#endif /* __ASSEMBLER__ */
+
 #endif /* _ASM_X86_VDSO_H */