Messages in this thread | | | Date | Fri, 24 Oct 2014 13:19:46 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] i386/audit: stop scribbling on the stack frame |
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On 10/23/2014 12:38 PM, Eric Paris wrote: >> >> After the call __audit_syscall_entry aren't they already polluted? >> Isn't that the reason we need to reload EAX? > > Well, I guess EAX is special... >
Because system calls are "asmlinkage", all the parameters are on the stack, but %eax is used as the index into the system call table. This should thus be fine until we get rid of regparm(0) entirely, if that ever happens.
-hpa
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