Very Computer

by **William Lee Irwin II** » Sat, 08 Dec 2001 12:20:11

> In fs/proc/array.c:proc_pid_statm() there is this test block:

> if (vma->vm_flags & VM_EXECUTABLE)
> trs += pages; /* text */
> else if (vma->vm_flags & VM_GROWSDOWN)
> drs += pages; /* stack */
> else if (vma->vm_end > 0x60000000)
> lrs += pages; /* library */
> else
> drs += pages;

> Is there any special reason for the hardcoded constant `0x60000000'?
> In the Linux/m68k tree, we use TASK_UNMAPPED_BASE instead. But I don't know
> why.

I think this is an old x86 load address for an ELF interpreter. Would
you be happy with ELF_ET_DYN_BASE? I made a fairly small patch that
deals with that.

Cheers,
Bill
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by **Andreas Schwa** » Sat, 08 Dec 2001 17:40:10

|> > In fs/proc/array.c:proc_pid_statm() there is this test block:
|> >
|> > if (vma->vm_flags & VM_EXECUTABLE)
|> > trs += pages; /* text */
|> > else if (vma->vm_flags & VM_GROWSDOWN)
|> > drs += pages; /* stack */
|> > else if (vma->vm_end > 0x60000000)
|> > lrs += pages; /* library */
|> > else
|> > drs += pages;
|> >
|> > Is there any special reason for the hardcoded constant `0x60000000'?
|> > In the Linux/m68k tree, we use TASK_UNMAPPED_BASE instead. But I don't know
|> > why.
|>
|> I think this is an old x86 load address for an ELF interpreter.

No, it is a leftover from the a.out times. IMHO it should be removed
completely. "Library pages" has no meaning for ELF.

Andreas.

--
Andreas Schwab "And now for something

SuSE Labs, SuSE GmbH, Schanz?ckerstr. 10, D-90443 Nrnberg
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by **Albert D. Cahala** » Sun, 09 Dec 2001 05:20:18

Quote:> No, it is a leftover from the a.out times. IMHO it should be removed
> completely. "Library pages" has no meaning for ELF.

"Library pages" == unmodified execute-only pages mapped from a
file that is not the executable.
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