linux/tile/arch_sigreturn.c

/* offset of ucontext in the kernel's sigframe structure */
# define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(siginfo_t)
const long addr = tile_regs.sp + SIGFRAME_UC_OFFSET +
		  offsetof(struct ucontext, uc_sigmask);

tprints("{mask=");
print_sigset_addr_len(tcp, addr, NSIG / 8);
tprints("}");