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    SubjectRe: sigaltstack doesn't do anything?
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    cmetz@inner.net (Craig Metz) writes:

    > I've been working on a program that needs to flip stacks around, and I'm
    > finding that sigaltstack() doesn't seem to cause any actual behavioral change
    > to happen, at least not with Linux/i386 2.2.0 and glibc 2.1.
    >
    > Take this test program:
    >
    [...]

    > stack_t ss, oss;
    >
    > if (!(stack = malloc(8192)))
    > exit(1);
    >
    > memset(&ss, 0, sizeof(stack_t));
    > ss.ss_sp = stack;
    > ss.ss_size = 8192;
    >
    > signal(SIGUSR1, sighandler);
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    Change it to a sigaction that sets SA_ONSTACK

    -Andi

    --
    This is like TV. I don't like TV.

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