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Line 71:
Line 71: − + − + − * <code>.parasite_type</code> should be set to <code>COMPEL_BLOB_CHEADER</code>+ − * <code>.hdr.mem</code> should be set to the <code>parasite_blob</code> of hgen+ − * <code>.hdr.bsize</code> should be set to the sizeof(this symbol) − * <code>.hdr.nr_gotpcrel</code> should be set to the <code>parasite_nr_gotpcrel</code> of hgen − * The following three offsets should be set to respective offsets generated with the <code>parasite_sym</code> value − ** <code>.hdr.parasite_ip_off</code> to <code>COMPEL_H_PARASITE_HEAD(parasite_sym)</code> − ** <code>.hdr.addr_cmd_off</code> to <code>COMPEL_H_PARASITE_CMD(parasite_sym)</code> − ** <code>.hdr.addr_arg_off</code> to <code>COMPEL_H_PARASITE_ARGS(paraste_sym)</code> − * <code>.hdr.relocs</code> should be set to <code>parasite_relocs</code> argument (it's an array) − * <code>.hdr.nr_relocs</code> should be set to a number of elements in this array (<code>sizeof(arr)/sizeof(arr[0])</code>)
→Infecting: fix according to latest git
Infecting the victim with a parasite blob needs some special treatment.
Infecting the victim with a parasite blob needs some special treatment.
First, the <code>ctl</code> should be configured with the blob information. Currently there is only one type of blobs, generated by <code>compel hgen</code>. To put this info into ctl, one should call <code>compel_parasite_blob_desc(ctl)</code> to get a pointer on <code>struct parasite_blob_desc</code> and fill in the fields of this strucure:
First, the <code>ctl</code> should be configured with the blob information. For that,
you should call <code>''PREFIX''_setup_c_header()</code> function,
where <code>''PREFIX''</code> is the same as the argument given to
<code>-p</code> option to <code>compel hgen</code>.
Second, when infecting a parasite one should specify the amount of threads it will mess with (1, if only the thread leader will be accessed) and the maximum size of the memory area shared between infecting task and parasite used for arguments/result passing.
Second, when infecting a parasite one should specify the amount of threads it will mess with (1, if only the thread leader will be accessed) and the maximum size of the memory area shared between infecting task and parasite used for arguments/result passing.