Messages in this thread |  | | Subject | Re: [patch 15/21] ptrace changes | From | Martin Schwidefsky <> | Date | Wed, 05 Nov 2008 12:41:24 +0100 |
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On Mon, 2008-11-03 at 11:14 -0600, David Smith wrote:
> Is this correct, or should the 1st syscall argument be found in > regs->orig_gpr2 by syscall_get_arguments()/syscall_set_arguments()?
The question is when do syscall_get_arguments and syscall_set_arguments functions get called? If they are called on a call chain that started from do_syscall_trace_enter then we'd have to use orig_gpr2 instead of gprs[2] but if the functions are not called via do_syscall_trace_enter the first argument is located in grprs[2]. As far as I can see the sole user of syscall_get_arguments is collect_syscall which is used to get the registers of a blocked process. In this case the kernel call chain does not include do_syscall_trace_enter, therefore the first argument is in gprs[2], no?
-- blue skies, Martin.
"Reality continues to ruin my life." - Calvin.
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