> For UML, instead, it's important to set that some peculiar syscalls are not > traced, that the mask is 1-extended and that errors are reported. > > So, I suggest a "flags" parameter for this. Sadly, we're using the ptrace() > syscall and there's no 5th argument normally, we could either use it (IIRC > some calls use the 5th regs indeed), or pass as "data" a struct with flags > and the mask. > > The flags could be: > > MASK_DEFAULT_TRACE (set the default to 1 for remaining bits) > MASK_DEFAULT_IGNORE (set the default to 0 for remaining bits) > MASK_STRICT_VERIFY (return -EINVAL for bits exceeding NR_syscalls and set > differently than the default). > > probably with a reasonable prefix to avoid namespace pollution (something > like > "PT_SC_-").
You might as well introduce yet another ptrace call which returns the number of system calls and for this ptrace call force user space to pass a complete bitmap. Sounds easier to me. > > The tracing process won't see > > any of the non existant syscalls it requested to see anyway. > No, you misunderstood the code, it does the opposite very different - the > loop Looks I missed a few "!"s :) ------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
