Messages in this thread | | | Date | Tue, 01 Jul 2008 21:45:07 -0700 (PDT) | Subject | Re: [10 PATCHES] inline functions to avoid stack overflow | From | David Miller <> |
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From: Mikulas Patocka <mpatocka@redhat.com> Date: Wed, 2 Jul 2008 00:39:35 -0400 (EDT)
> The ABI is very vague about it. The V9 ABI just displays that 6-word space > in a figure bug doesn't say anything about it's usage. The V8 ABI just > says that "the function may write incoming arguments there". If it may > write anything other, it is unknown --- probably yes, but it is not said > in the document. > > The document nicely specifies who owns which registers, but doesn't say > that about the stack space :-(
Actually, I know for a fact that you have to have those slots there.
A long time ago in the sparc64 kernel, in the trap entry code, I tried only giving 128 bytes of stack frame as the trap entry called into C code. And it did not work, I had to put the 6 slots there.
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