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-rw-r--r--include/asm-i386/elf.h53
1 files changed, 40 insertions, 13 deletions
diff --git a/include/asm-i386/elf.h b/include/asm-i386/elf.h
index 4153d80e4d2b..1eac92cb5b16 100644
--- a/include/asm-i386/elf.h
+++ b/include/asm-i386/elf.h
@@ -10,6 +10,7 @@
#include <asm/processor.h>
#include <asm/system.h> /* for savesegment */
#include <asm/auxvec.h>
+#include <asm/desc.h>
#include <linux/utsname.h>
@@ -129,15 +130,41 @@ extern int dump_task_extended_fpu (struct task_struct *, struct user_fxsr_struct
#define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs)
#define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs) dump_task_extended_fpu(tsk, elf_xfpregs)
-#define VSYSCALL_BASE (__fix_to_virt(FIX_VSYSCALL))
-#define VSYSCALL_EHDR ((const struct elfhdr *) VSYSCALL_BASE)
-#define VSYSCALL_ENTRY ((unsigned long) &__kernel_vsyscall)
+#define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO))
+#define VDSO_BASE ((unsigned long)current->mm->context.vdso)
+
+#ifdef CONFIG_COMPAT_VDSO
+# define VDSO_COMPAT_BASE VDSO_HIGH_BASE
+# define VDSO_PRELINK VDSO_HIGH_BASE
+#else
+# define VDSO_COMPAT_BASE VDSO_BASE
+# define VDSO_PRELINK 0
+#endif
+
+#define VDSO_COMPAT_SYM(x) \
+ (VDSO_COMPAT_BASE + (unsigned long)(x) - VDSO_PRELINK)
+
+#define VDSO_SYM(x) \
+ (VDSO_BASE + (unsigned long)(x) - VDSO_PRELINK)
+
+#define VDSO_HIGH_EHDR ((const struct elfhdr *) VDSO_HIGH_BASE)
+#define VDSO_EHDR ((const struct elfhdr *) VDSO_COMPAT_BASE)
+
extern void __kernel_vsyscall;
+#define VDSO_ENTRY VDSO_SYM(&__kernel_vsyscall)
+
+#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
+struct linux_binprm;
+extern int arch_setup_additional_pages(struct linux_binprm *bprm,
+ int executable_stack);
+
+extern unsigned int vdso_enabled;
+
#define ARCH_DLINFO \
-do { \
- NEW_AUX_ENT(AT_SYSINFO, VSYSCALL_ENTRY); \
- NEW_AUX_ENT(AT_SYSINFO_EHDR, VSYSCALL_BASE); \
+do if (vdso_enabled) { \
+ NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \
+ NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_COMPAT_BASE); \
} while (0)
/*
@@ -148,15 +175,15 @@ do { \
* Dumping its extra ELF program headers includes all the other information
* a debugger needs to easily find how the vsyscall DSO was being used.
*/
-#define ELF_CORE_EXTRA_PHDRS (VSYSCALL_EHDR->e_phnum)
+#define ELF_CORE_EXTRA_PHDRS (VDSO_HIGH_EHDR->e_phnum)
#define ELF_CORE_WRITE_EXTRA_PHDRS \
do { \
const struct elf_phdr *const vsyscall_phdrs = \
- (const struct elf_phdr *) (VSYSCALL_BASE \
- + VSYSCALL_EHDR->e_phoff); \
+ (const struct elf_phdr *) (VDSO_HIGH_BASE \
+ + VDSO_HIGH_EHDR->e_phoff); \
int i; \
Elf32_Off ofs = 0; \
- for (i = 0; i < VSYSCALL_EHDR->e_phnum; ++i) { \
+ for (i = 0; i < VDSO_HIGH_EHDR->e_phnum; ++i) { \
struct elf_phdr phdr = vsyscall_phdrs[i]; \
if (phdr.p_type == PT_LOAD) { \
BUG_ON(ofs != 0); \
@@ -174,10 +201,10 @@ do { \
#define ELF_CORE_WRITE_EXTRA_DATA \
do { \
const struct elf_phdr *const vsyscall_phdrs = \
- (const struct elf_phdr *) (VSYSCALL_BASE \
- + VSYSCALL_EHDR->e_phoff); \
+ (const struct elf_phdr *) (VDSO_HIGH_BASE \
+ + VDSO_HIGH_EHDR->e_phoff); \
int i; \
- for (i = 0; i < VSYSCALL_EHDR->e_phnum; ++i) { \
+ for (i = 0; i < VDSO_HIGH_EHDR->e_phnum; ++i) { \
if (vsyscall_phdrs[i].p_type == PT_LOAD) \
DUMP_WRITE((void *) vsyscall_phdrs[i].p_vaddr, \
PAGE_ALIGN(vsyscall_phdrs[i].p_memsz)); \
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