Kyle, The execve_wrapper macro loads thread->task like this: LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 This assumes that at the point the macro is called that there is only THREAD_SZ_ALGN+FRAME_SIZE between %r30 and the starting value of %r30 (cr30). However, in the syscall entry path I see (syscall.S): ldo THREAD_SZ_ALGN+FRAME_SIZE(%r30),%r30 /* set up kernel stack */ ... STREGM %r1,FRAME_SIZE(%r30) /* save r1 (usp) here for now */ Which means that between %r30 and the start there is actually THREAD_SZ_ALGN+2*FRAME_SIZE. I believe that these should match, so that when we return we can restore some of the things we saved. e.g. execve_wrapper should read: LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE-FRAME_SIZE(%r30),%r1 or heaven forbid the easier to read: mfctl %cr30,%r1 /* get task ptr in %r1 */ LDREG TI_TASK(%r1),%r1 Comments? Cheers, Carlos. -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
