pie: x86 -- Do a real call for applying relocations

At moment both parasite and restorer do not have
any relocs because we support x86-64 only, but
this will be changed soon so do a call and apply
relocations.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-restore.c

@@ -2392,6 +2392,10 @@ static int remap_restorer_blob(void *addr)
 		return -1;
 	}
 
+#if defined(CONFIG_X86_64) || defined(CONFIG_X86_32)
+	elf_apply_relocs(addr, addr, sizeof(restorer_blob),
+			 elf_relocs, ARRAY_SIZE(elf_relocs));
+#endif
 	return 0;
 }
 

parasite-syscall.c

@@ -1223,6 +1223,11 @@ struct parasite_ctl *parasite_infect_seized(pid_t pid, struct pstree_item *item,
 	pr_info("Putting parasite blob into %p->%p\n", ctl->local_map, ctl->remote_map);
 	memcpy(ctl->local_map, parasite_blob, sizeof(parasite_blob));
 
+#if defined(CONFIG_X86_64) || defined(CONFIG_X86_32)
+	elf_apply_relocs(ctl->local_map, ctl->remote_map, sizeof(parasite_blob),
+			 elf_relocs, ARRAY_SIZE(elf_relocs));
+#endif
+
 	/* Setup the rest of a control block */
 	ctl->parasite_ip	= (unsigned long)parasite_sym(ctl->remote_map, __export_parasite_head_start);
 	ctl->addr_cmd		= parasite_sym(ctl->local_map, __export_parasite_cmd);