diff options
| author | Roland McGrath <roland@redhat.com> | 2008-01-30 15:30:41 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 15:30:41 +0300 |
| commit | 7f3646aa16f496201e045183402c6614fa27b0c7 (patch) | |
| tree | afbee61e10ce854f683e27b0fdd0097fc9200f75 /arch/x86/vdso/vma.c | |
| parent | 5b93049337301d6fbd3cf55db99b34e6b0dbd3a3 (diff) | |
| download | linux-7f3646aa16f496201e045183402c6614fa27b0c7.tar.xz | |
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 'arch/x86/vdso/vma.c')
| -rw-r--r-- | arch/x86/vdso/vma.c | 18 |
1 files changed, 7 insertions, 11 deletions
diff --git a/arch/x86/vdso/vma.c b/arch/x86/vdso/vma.c index ff9333e5fb08..3fdd51497a83 100644 --- a/arch/x86/vdso/vma.c +++ b/arch/x86/vdso/vma.c @@ -11,23 +11,20 @@ #include <asm/vsyscall.h> #include <asm/vgtod.h> #include <asm/proto.h> -#include "voffset.h" +#include <asm/vdso.h> -int vdso_enabled = 1; - -#define VEXTERN(x) extern typeof(__ ## x) *vdso_ ## x; -#include "vextern.h" +#include "vextern.h" /* Just for VMAGIC. */ #undef VEXTERN -extern char vdso_kernel_start[], vdso_start[], vdso_end[]; +int vdso_enabled = 1; + +extern char vdso_start[], vdso_end[]; extern unsigned short vdso_sync_cpuid; struct page **vdso_pages; -static inline void *var_ref(void *vbase, char *var, char *name) +static inline void *var_ref(void *p, char *name) { - unsigned offset = var - &vdso_kernel_start[0] + VDSO_TEXT_OFFSET; - void *p = vbase + offset; if (*(void **)p != (void *)VMAGIC) { printk("VDSO: variable %s broken\n", name); vdso_enabled = 0; @@ -62,9 +59,8 @@ static int __init init_vdso_vars(void) vdso_enabled = 0; } -#define V(x) *(typeof(x) *) var_ref(vbase, (char *)RELOC_HIDE(&x, 0), #x) #define VEXTERN(x) \ - V(vdso_ ## x) = &__ ## x; + *(typeof(__ ## x) **) var_ref(VDSO64_SYMBOL(vbase, x), #x) = &__ ## x; #include "vextern.h" #undef VEXTERN return 0; |