[PATCH] x86_64 ia32 vDSO: define arch_vma_name
This patch makes x86_64 define arch_vma_name for CONFIG_IA32_EMULATION. This makes the ia32 vDSO mapping appear in /proc/PID/maps with "[vdso]" for ia32 processes, as it does on native i386. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -82,6 +82,14 @@ int syscall32_setup_pages(struct linux_binprm *bprm, int exstack)
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return 0;
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}
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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_start == VSYSCALL32_BASE &&
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vma->vm_mm && vma->vm_mm->task_size == IA32_PAGE_OFFSET)
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return "[vdso]";
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return NULL;
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}
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static int __init init_syscall32(void)
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{
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syscall32_page = (void *)get_zeroed_page(GFP_KERNEL);
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