linux/mips/arch_sigreturn.c

#if defined LINUX_MIPSO32
/*
 * offsetof(struct sigframe, sf_mask) ==
 * sizeof(sf_ass) + sizeof(sf_pad) + sizeof(struct sigcontext)
 */
const long addr = mips_REG_SP + 6 * 4 +
		  sizeof(struct sigcontext);
#else
/*
 * This decodes rt_sigreturn.
 * The 64-bit ABIs do not have sigreturn.
 *
 * offsetof(struct rt_sigframe, rs_uc) ==
 * sizeof(sf_ass) + sizeof(sf_pad) + sizeof(struct siginfo)
 */
const long addr = mips_REG_SP + 6 * 4 + 128 +
		  offsetof(struct ucontext, uc_sigmask);
#endif

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