if (sp < stack_page + sizeof(struct thread_struct) ||
sp > stack_end - STACK_FRAME_MIN_SIZE) {
- return 1;
+ return -EINVAL;
}
for (firstframe = true; sp != stack_end;
/* sanity check: ABI requires SP to be aligned 16 bytes. */
if (sp & 0xF)
- return 1;
+ return -EINVAL;
newsp = stack[0];
/* Stack grows downwards; unwinder may only go up. */
if (newsp <= sp)
- return 1;
+ return -EINVAL;
if (newsp != stack_end &&
newsp > stack_end - STACK_FRAME_MIN_SIZE) {
- return 1; /* invalid backlink, too far up. */
+ return -EINVAL; /* invalid backlink, too far up. */
}
/*
/* Mark stacktraces with exception frames as unreliable. */
if (sp <= stack_end - STACK_INT_FRAME_SIZE &&
stack[STACK_FRAME_MARKER] == STACK_FRAME_REGS_MARKER) {
- return 1;
+ return -EINVAL;
}
/* Examine the saved LR: it must point into kernel code. */
ip = stack[STACK_FRAME_LR_SAVE];
if (!__kernel_text_address(ip))
- return 1;
+ return -EINVAL;
/*
* FIXME: IMHO these tests do not belong in
* as unreliable.
*/
if (ip == (unsigned long)kretprobe_trampoline)
- return 1;
+ return -EINVAL;
#endif
if (trace->nr_entries >= trace->max_entries)