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um: set __HAVE_ARCH_GATE_AREA for x86_64

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Implement arch_vma_name() and make get_gate_vma(), in_gate_area() and
in_gate_area_no_mm() a nop.

We need arch_vma_name() to support vDSO.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Richard Weinberger 2011-07-25 17:12:54 -07:00 committed by Linus Torvalds
parent 548f0a4e02
commit fc9a00187b
3 changed files with 37 additions and 1 deletions
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2
arch/um/sys-x86_64/Makefile
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@ -4,7 +4,7 @@
# Licensed under the GPL
#
obj-y = bug.o bugs.o delay.o fault.o ldt.o ptrace.o ptrace_user.o \
obj-y = bug.o bugs.o delay.o fault.o ldt.o ptrace.o ptrace_user.o mem.o \
setjmp.o signal.o stub.o stub_segv.o syscalls.o syscall_table.o \
sysrq.o ksyms.o tls.o

10
arch/um/sys-x86_64/asm/elf.h
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@ -119,4 +119,14 @@ extern long elf_aux_hwcap;
#define SET_PERSONALITY(ex) do ; while(0)
#define __HAVE_ARCH_GATE_AREA 1
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
struct linux_binprm;
extern int arch_setup_additional_pages(struct linux_binprm *bprm,
int uses_interp);
extern unsigned long um_vdso_addr;
#define AT_SYSINFO_EHDR 33
#define ARCH_DLINFO NEW_AUX_ENT(AT_SYSINFO_EHDR, um_vdso_addr)
#endif

26
arch/um/sys-x86_64/mem.c Normal file
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@ -0,0 +1,26 @@
#include "linux/mm.h"
#include "asm/page.h"
#include "asm/mman.h"
const char *arch_vma_name(struct vm_area_struct *vma)
{
if (vma->vm_mm && vma->vm_start == um_vdso_addr)
return "[vdso]";
return NULL;
}
struct vm_area_struct *get_gate_vma(struct mm_struct *mm)
{
return NULL;
}
int in_gate_area(struct mm_struct *mm, unsigned long addr)
{
return 0;
}
int in_gate_area_no_mm(unsigned long addr)
{
return 0;
}