static void setup_frame(int sig, struct emulated_sigaction *ka, target_sigset_t *set, CPUX86State *env) { struct sigframe *frame; int err = 0; frame = get_sigframe(ka, env, sizeof(*frame)); #if 0 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) goto give_sigsegv; #endif err |= __put_user((/*current->exec_domain && current->exec_domain->signal_invmap && sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig), &frame->sig); if (err) goto give_sigsegv; setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0]); if (err) goto give_sigsegv; if (TARGET_NSIG_WORDS > 1) { err |= __copy_to_user(frame->extramask, &set->sig[1], sizeof(frame->extramask)); } if (err) goto give_sigsegv; /* Set up to return from userspace. If provided, use a stub already in userspace. */ if (ka->sa.sa_flags & TARGET_SA_RESTORER) { err |= __put_user(ka->sa.sa_restorer, &frame->pretcode); } else { err |= __put_user(frame->retcode, &frame->pretcode); /* This is popl %eax ; movl $,%eax ; int $0x80 */ err |= __put_user(0xb858, (short *)(frame->retcode+0)); err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2)); err |= __put_user(0x80cd, (short *)(frame->retcode+6)); } if (err) goto give_sigsegv; /* Set up registers for signal handler */ env->regs[R_ESP] = (unsigned long) frame; env->eip = (unsigned long) ka->sa._sa_handler; cpu_x86_load_seg(env, R_DS, __USER_DS); cpu_x86_load_seg(env, R_ES, __USER_DS); cpu_x86_load_seg(env, R_SS, __USER_DS); cpu_x86_load_seg(env, R_CS, __USER_CS); env->eflags &= ~TF_MASK; return; give_sigsegv: if (sig == TARGET_SIGSEGV) ka->sa._sa_handler = TARGET_SIG_DFL; force_sig(TARGET_SIGSEGV /* , current */); }