diff options
Diffstat (limited to 'include/asm-x86/vdso.h')
| -rw-r--r-- | include/asm-x86/vdso.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/asm-x86/vdso.h b/include/asm-x86/vdso.h new file mode 100644 index 00000000000..629bcb6e8e4 --- /dev/null +++ b/include/asm-x86/vdso.h @@ -0,0 +1,28 @@ +#ifndef _ASM_X86_VDSO_H +#define _ASM_X86_VDSO_H 1 + +#ifdef CONFIG_X86_64 +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 + +#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 */ |