diff options
| author |   Roland McGrath <roland@redhat.com> | 2008-01-30 13:30:41 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:30:41 +0100 |
| commit | 7f3646aa16f496201e045183402c6614fa27b0c7 (patch) | |
| tree | afbee61e10ce854f683e27b0fdd0097fc9200f75 /include | |
| parent | x86 vDSO: generate vdso-syms.lds (diff) | |
| download | linux-dev-7f3646aa16f496201e045183402c6614fa27b0c7.tar.xz linux-dev-7f3646aa16f496201e045183402c6614fa27b0c7.zip | |
x86 vDSO: use vdso-syms.lds
This patch changes the kernel's references to addresses in the vDSO image
to be based on the symbols defined by vdso-syms.lds instead of the old
vdso-syms.o symbols. This is all wrapped up in a macro defined by the new
asm-x86/vdso.h header; that's the only place in the kernel source that has
to know the details of the scheme for getting vDSO symbol values.
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/vdso.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/asm-x86/vdso.h b/include/asm-x86/vdso.h new file mode 100644 index 000000000000..9379ec06fd1f --- /dev/null +++ b/include/asm-x86/vdso.h @@ -0,0 +1,14 @@ +#ifndef _ASM_X86_VDSO_H +#define _ASM_X86_VDSO_H 1 + +extern const char VDSO64_PRELINK[]; + +/* + * Given a pointer to the vDSO image, find the pointer to VDSO64_name + * as that symbol is defined in the vDSO sources or linker script. + */ +#define VDSO64_SYMBOL(base, name) ({ \ + extern const char VDSO64_##name[]; \ + (void *) (VDSO64_##name - VDSO64_PRELINK + (unsigned long) (base)); }) + +#endif /* asm-x86/vdso.h */ |