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Re: [RFC]confusion about syscall | |
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Hi... On Sun, Jul 15, 2012 at 4:18 PM, 王哲 <wangzhe5004@xxxxxxxxx> wrote: > thanks for reply. > and i wander why the address of vsyscall page is not 0xffffe000 in my > system? address space randomization sometimes put the vsyscall page in much lower address AFAIK. And it varies per invocation... But wait, i just recall that your getpid() might contain a jump into unpatched PLT first. It happens for the first time an external function is called. On subsequent call, getpid() will jump directly to the needed address in glibc. Once I wrote about it....try google... -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
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