x86, vdso: Move the 32-bit vdso special pages after the text
This unifies the vdso mapping code and teaches it how to map special
pages at addresses corresponding to symbols in the vdso image. The
new code is used for all vdso variants, but so far only the 32-bit
variants use the new vvar page position.
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/r/b6d7858ad7b5ac3fd3c29cab6d6d769bc45d195e.1399317206.git.luto@amacapital.net
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/arch/x86/include/asm/elf.h b/arch/x86/include/asm/elf.h
index 65b21bc..1a055c8 100644
--- a/arch/x86/include/asm/elf.h
+++ b/arch/x86/include/asm/elf.h
@@ -333,11 +333,9 @@
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
extern int arch_setup_additional_pages(struct linux_binprm *bprm,
int uses_interp);
-extern int x32_setup_additional_pages(struct linux_binprm *bprm,
- int uses_interp);
-
-extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
-#define compat_arch_setup_additional_pages syscall32_setup_pages
+extern int compat_arch_setup_additional_pages(struct linux_binprm *bprm,
+ int uses_interp);
+#define compat_arch_setup_additional_pages compat_arch_setup_additional_pages
extern unsigned long arch_randomize_brk(struct mm_struct *mm);
#define arch_randomize_brk arch_randomize_brk
diff --git a/arch/x86/include/asm/vdso.h b/arch/x86/include/asm/vdso.h
index 389fe2c..d0a2c90 100644
--- a/arch/x86/include/asm/vdso.h
+++ b/arch/x86/include/asm/vdso.h
@@ -14,6 +14,10 @@
unsigned long alt, alt_len;
+ unsigned long sym_end_mapping; /* Total size of the mapping */
+
+ unsigned long sym_vvar_page;
+ unsigned long sym_hpet_page;
unsigned long sym_VDSO32_NOTE_MASK;
unsigned long sym___kernel_sigreturn;
unsigned long sym___kernel_rt_sigreturn;
diff --git a/arch/x86/include/asm/vdso32.h b/arch/x86/include/asm/vdso32.h
deleted file mode 100644
index 7efb701..0000000
--- a/arch/x86/include/asm/vdso32.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#ifndef _ASM_X86_VDSO32_H
-#define _ASM_X86_VDSO32_H
-
-#define VDSO_BASE_PAGE 0
-#define VDSO_VVAR_PAGE 1
-#define VDSO_HPET_PAGE 2
-#define VDSO_PAGES 3
-#define VDSO_PREV_PAGES 2
-#define VDSO_OFFSET(x) ((x) * PAGE_SIZE)
-
-#endif
