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authorRoland McGrath <roland@redhat.com>2008-01-30 13:30:42 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:30:42 +0100
commit6c3652efcafa6a6d795093362cb4290c84994b5c (patch)
tree1587379f45a7145a64c3103b40e12b01c46ea559 /include
parent0249c9c1e7505c2b020bcc6deaf1e0415de9943e (diff)
x86 vDSO: i386 vdso32
This makes the i386 kernel use the new vDSO build in arch/x86/vdso/vdso32/ to replace the old one from arch/x86/kernel/. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include')
-rw-r--r--include/asm-x86/elf.h13
-rw-r--r--include/asm-x86/vdso.h14
2 files changed, 17 insertions, 10 deletions
diff --git a/include/asm-x86/elf.h b/include/asm-x86/elf.h
index cd3204ebbbdd..70edff2d5671 100644
--- a/include/asm-x86/elf.h
+++ b/include/asm-x86/elf.h
@@ -78,6 +78,7 @@ typedef struct user_fxsr_struct elf_fpxregset_t;
#include <asm/processor.h>
#include <asm/system.h> /* for savesegment */
#include <asm/desc.h>
+#include <asm/vdso.h>
/*
* This is used to ensure we don't load something for the wrong architecture.
@@ -247,17 +248,9 @@ extern int dump_task_extended_fpu (struct task_struct *,
#define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO))
#define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso)
-#define VDSO_PRELINK 0
-#define VDSO_SYM(x) \
- (VDSO_CURRENT_BASE + (unsigned long)(x) - VDSO_PRELINK)
-
-#define VDSO_HIGH_EHDR ((const struct elfhdr *) VDSO_HIGH_BASE)
-#define VDSO_EHDR ((const struct elfhdr *) VDSO_CURRENT_BASE)
-
-extern void __kernel_vsyscall;
-
-#define VDSO_ENTRY VDSO_SYM(&__kernel_vsyscall)
+#define VDSO_ENTRY \
+ ((unsigned long) VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall))
/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
diff --git a/include/asm-x86/vdso.h b/include/asm-x86/vdso.h
index 9379ec06fd1f..629bcb6e8e45 100644
--- a/include/asm-x86/vdso.h
+++ b/include/asm-x86/vdso.h
@@ -1,6 +1,7 @@
#ifndef _ASM_X86_VDSO_H
#define _ASM_X86_VDSO_H 1
+#ifdef CONFIG_X86_64
extern const char VDSO64_PRELINK[];
/*
@@ -10,5 +11,18 @@ extern const char VDSO64_PRELINK[];
#define VDSO64_SYMBOL(base, name) ({ \
extern const char VDSO64_##name[]; \
(void *) (VDSO64_##name - VDSO64_PRELINK + (unsigned long) (base)); })
+#endif
+
+#if defined CONFIG_X86_32 || defined CONFIG_COMPAT
+extern const char VDSO32_PRELINK[];
+
+/*
+ * 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 *) (VDSO32_##name - VDSO32_PRELINK + (unsigned long) (base)); })
+#endif
#endif /* asm-x86/vdso.h */