um: set __HAVE_ARCH_GATE_AREA for x86_64
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>
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3 changed files with 37 additions and 1 deletions
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@ -4,7 +4,7 @@
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# Licensed under the GPL
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#
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obj-y = bug.o bugs.o delay.o fault.o ldt.o ptrace.o ptrace_user.o \
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obj-y = bug.o bugs.o delay.o fault.o ldt.o ptrace.o ptrace_user.o mem.o \
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setjmp.o signal.o stub.o stub_segv.o syscalls.o syscall_table.o \
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sysrq.o ksyms.o tls.o
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@ -119,4 +119,14 @@ extern long elf_aux_hwcap;
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#define SET_PERSONALITY(ex) do ; while(0)
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#define __HAVE_ARCH_GATE_AREA 1
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#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
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struct linux_binprm;
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extern int arch_setup_additional_pages(struct linux_binprm *bprm,
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int uses_interp);
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extern unsigned long um_vdso_addr;
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#define AT_SYSINFO_EHDR 33
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#define ARCH_DLINFO NEW_AUX_ENT(AT_SYSINFO_EHDR, um_vdso_addr)
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#endif
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26
arch/um/sys-x86_64/mem.c
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26
arch/um/sys-x86_64/mem.c
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@ -0,0 +1,26 @@
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#include "linux/mm.h"
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#include "asm/page.h"
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#include "asm/mman.h"
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const char *arch_vma_name(struct vm_area_struct *vma)
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{
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if (vma->vm_mm && vma->vm_start == um_vdso_addr)
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return "[vdso]";
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return NULL;
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}
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struct vm_area_struct *get_gate_vma(struct mm_struct *mm)
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{
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return NULL;
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}
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int in_gate_area(struct mm_struct *mm, unsigned long addr)
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{
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return 0;
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}
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int in_gate_area_no_mm(unsigned long addr)
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{
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return 0;
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}
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