static Addr build_sigframe(ThreadState *tst, Addr sp_top_of_frame, const vki_siginfo_t *siginfo, const struct vki_ucontext *siguc, UInt flags, const vki_sigset_t *mask, void *restorer) { struct sigframe *frame; Addr sp = sp_top_of_frame; vg_assert((flags & VKI_SA_SIGINFO) == 0); vg_assert((sizeof(*frame) & 7) == 0); vg_assert((sp & 7) == 0); sp -= sizeof(*frame); frame = (struct sigframe *)sp; if (! ML_(sf_maybe_extend_stack)(tst, sp, sizeof(*frame), flags)) return sp_top_of_frame; /* retcode, sigNo, sc, sregs fields are to be written */ VG_TRACK( pre_mem_write, Vg_CoreSignal, tst->tid, "signal handler frame", sp, offsetof(struct sigframe, vg) ); save_sigregs(tst, &frame->sregs); frame->sigNo = siginfo->si_signo; frame->sc.sregs = &frame->sregs; VG_(memcpy)(frame->sc.oldmask, mask->sig, sizeof(frame->sc.oldmask)); if (flags & VKI_SA_RESTORER) { SET_SIGNAL_GPR(tst, 14, restorer); } else { frame->retcode[0] = 0x0a; frame->retcode[1] = __NR_sigreturn; /* This normally should be &frame->recode. but since there might be problems with non-exec stack and we must discard the translation for the on-stack sigreturn we just use the trampoline like x86,ppc. We still fill in the retcode, lets just hope that nobody actually jumps here */ SET_SIGNAL_GPR(tst, 14, (Addr)&VG_(s390x_linux_SUBST_FOR_sigreturn)); } SET_SIGNAL_GPR(tst, 2, siginfo->si_signo); SET_SIGNAL_GPR(tst, 3, &frame->sc); /* fixs390: we dont fill in trapno and prot_addr in r4 and r5*/ /* Set up backchain. */ *((Addr *) sp) = sp_top_of_frame; VG_TRACK( post_mem_write, Vg_CoreSignal, tst->tid, sp, offsetof(struct sigframe, vg) ); build_vg_sigframe(&frame->vg, tst, flags, siginfo->si_signo); return sp; }
static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set, struct pt_regs * regs) { sigframe __user *frame; frame = get_sigframe(ka, regs, sizeof(sigframe)); if (!access_ok(VERIFY_WRITE, frame, sizeof(sigframe))) goto give_sigsegv; if (frame == (void __user *) -1UL) goto give_sigsegv; if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE)) goto give_sigsegv; if (save_sigregs(regs, &frame->sregs)) goto give_sigsegv; if (__put_user(&frame->sregs, &frame->sc.sregs)) goto give_sigsegv; /* Set up to return from userspace. If provided, use a stub already in userspace. */ if (ka->sa.sa_flags & SA_RESTORER) { regs->gprs[14] = (unsigned long) ka->sa.sa_restorer | PSW_ADDR_AMODE; } else { regs->gprs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE; if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn, (u16 __user *)(frame->retcode))) goto give_sigsegv; } /* Set up backchain. */ if (__put_user(regs->gprs[15], (addr_t __user *) frame)) goto give_sigsegv; /* Set up registers for signal handler */ regs->gprs[15] = (unsigned long) frame; regs->psw.addr = (unsigned long) ka->sa.sa_handler | PSW_ADDR_AMODE; regs->gprs[2] = map_signal(sig); regs->gprs[3] = (unsigned long) &frame->sc; /* We forgot to include these in the sigcontext. To avoid breaking binary compatibility, they are passed as args. */ regs->gprs[4] = current->thread.trap_no; regs->gprs[5] = current->thread.prot_addr; /* Place signal number on stack to allow backtrace from handler. */ if (__put_user(regs->gprs[2], (int __user *) &frame->signo)) goto give_sigsegv; return 0; give_sigsegv: force_sigsegv(sig, current); return -EFAULT; }
static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *set, struct pt_regs * regs) { int err = 0; rt_sigframe __user *frame; frame = get_sigframe(ka, regs, sizeof(rt_sigframe)); if (!access_ok(VERIFY_WRITE, frame, sizeof(rt_sigframe))) goto give_sigsegv; if (frame == (void __user *) -1UL) goto give_sigsegv; if (copy_siginfo_to_user(&frame->info, info)) goto give_sigsegv; /* Create the ucontext. */ err |= __put_user(0, &frame->uc.uc_flags); err |= __put_user(NULL, &frame->uc.uc_link); err |= __put_user((void __user *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp); err |= __put_user(sas_ss_flags(regs->gprs[15]), &frame->uc.uc_stack.ss_flags); err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); err |= save_sigregs(regs, &frame->uc.uc_mcontext); err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); if (err) goto give_sigsegv; /* Set up to return from userspace. If provided, use a stub already in userspace. */ if (ka->sa.sa_flags & SA_RESTORER) { regs->gprs[14] = (unsigned long) ka->sa.sa_restorer | PSW_ADDR_AMODE; } else { regs->gprs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE; if (__put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn, (u16 __user *)(frame->retcode))) goto give_sigsegv; } /* Set up backchain. */ if (__put_user(regs->gprs[15], (addr_t __user *) frame)) goto give_sigsegv; /* Set up registers for signal handler */ regs->gprs[15] = (unsigned long) frame; regs->psw.addr = (unsigned long) ka->sa.sa_handler | PSW_ADDR_AMODE; regs->gprs[2] = map_signal(sig); regs->gprs[3] = (unsigned long) &frame->info; regs->gprs[4] = (unsigned long) &frame->uc; return 0; give_sigsegv: force_sigsegv(sig, current); return -EFAULT; }
static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *set, struct pt_regs * regs) { int err = 0; rt_sigframe __user *frame; frame = get_sigframe(ka, regs, sizeof(rt_sigframe)); if (frame == (void __user *) -1UL) goto give_sigsegv; if (copy_siginfo_to_user(&frame->info, info)) goto give_sigsegv; /* Create the ucontext. */ err |= __put_user(0, &frame->uc.uc_flags); err |= __put_user(NULL, &frame->uc.uc_link); err |= __save_altstack(&frame->uc.uc_stack, regs->gprs[15]); err |= save_sigregs(regs, &frame->uc.uc_mcontext); err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); if (err) goto give_sigsegv; /* Set up to return from userspace. If provided, use a stub already in userspace. */ if (ka->sa.sa_flags & SA_RESTORER) { regs->gprs[14] = (unsigned long) ka->sa.sa_restorer | PSW_ADDR_AMODE; } else { regs->gprs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE; if (__put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn, (u16 __user *)(frame->retcode))) goto give_sigsegv; } /* Set up backchain. */ if (__put_user(regs->gprs[15], (addr_t __user *) frame)) goto give_sigsegv; /* Set up registers for signal handler */ regs->gprs[15] = (unsigned long) frame; /* Force default amode and default user address space control. */ regs->psw.mask = PSW_MASK_EA | PSW_MASK_BA | (PSW_USER_BITS & PSW_MASK_ASC) | (regs->psw.mask & ~PSW_MASK_ASC); regs->psw.addr = (unsigned long) ka->sa.sa_handler | PSW_ADDR_AMODE; regs->gprs[2] = map_signal(sig); regs->gprs[3] = (unsigned long) &frame->info; regs->gprs[4] = (unsigned long) &frame->uc; regs->gprs[5] = task_thread_info(current)->last_break; return 0; give_sigsegv: force_sigsegv(sig, current); return -EFAULT; }
static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *set, struct pt_regs * regs) { int err = 0; rt_sigframe *frame = get_sigframe(ka, regs, sizeof(rt_sigframe)); if (!access_ok(VERIFY_WRITE, frame, sizeof(rt_sigframe))) goto give_sigsegv; if (copy_siginfo_to_user(&frame->info, info)) goto give_sigsegv; /* Create the ucontext. */ err |= __put_user(0, &frame->uc.uc_flags); err |= __put_user(0, &frame->uc.uc_link); err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp); err |= __put_user(sas_ss_flags(regs->gprs[15]), &frame->uc.uc_stack.ss_flags); err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); err |= save_sigregs(regs, &frame->uc.uc_mcontext); err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); if (err) goto give_sigsegv; /* Set up to return from userspace. If provided, use a stub already in userspace. */ if (ka->sa.sa_flags & SA_RESTORER) { regs->gprs[14] = FIX_PSW(ka->sa.sa_restorer); } else { regs->gprs[14] = FIX_PSW(frame->retcode); err |= __put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn, (u16 *)(frame->retcode)); } /* Set up backchain. */ if (__put_user(regs->gprs[15], (addr_t *) frame)) goto give_sigsegv; /* Set up registers for signal handler */ regs->gprs[15] = (addr_t)frame; regs->psw.addr = FIX_PSW(ka->sa.sa_handler); regs->psw.mask = _USER_PSW_MASK; regs->gprs[2] = map_signal(sig); regs->gprs[3] = (addr_t)&frame->info; regs->gprs[4] = (addr_t)&frame->uc; return; give_sigsegv: if (sig == SIGSEGV) ka->sa.sa_handler = SIG_DFL; force_sig(SIGSEGV, current); }
static void setup_frame(int sig, struct k_sigaction *ka, sigset_t *set, struct pt_regs * regs) { sigframe *frame = get_sigframe(ka, regs, sizeof(sigframe)); if (!access_ok(VERIFY_WRITE, frame, sizeof(sigframe))) goto give_sigsegv; if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE)) goto give_sigsegv; if (save_sigregs(regs, &frame->sregs)) goto give_sigsegv; if (__put_user(&frame->sregs, &frame->sc.sregs)) goto give_sigsegv; /* Set up to return from userspace. If provided, use a stub already in userspace. */ if (ka->sa.sa_flags & SA_RESTORER) { regs->gprs[14] = FIX_PSW(ka->sa.sa_restorer); } else { regs->gprs[14] = FIX_PSW(frame->retcode); if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn, (u16 *)(frame->retcode))) goto give_sigsegv; } /* Set up backchain. */ if (__put_user(regs->gprs[15], (addr_t *) frame)) goto give_sigsegv; /* Set up registers for signal handler */ regs->gprs[15] = (addr_t)frame; regs->psw.addr = FIX_PSW(ka->sa.sa_handler); regs->psw.mask = _USER_PSW_MASK; regs->gprs[2] = map_signal(sig); regs->gprs[3] = (addr_t)&frame->sc; /* We forgot to include these in the sigcontext. To avoid breaking binary compatibility, they are passed as args. */ regs->gprs[4] = current->thread.trap_no; regs->gprs[5] = current->thread.prot_addr; return; give_sigsegv: if (sig == SIGSEGV) ka->sa.sa_handler = SIG_DFL; force_sig(SIGSEGV, current); }
static void *setup_frame_common(int sig, struct k_sigaction *ka, sigset_t *set, struct pt_regs * regs, int frame_size,u16 retcode) { sigframe *frame; int err; frame = get_sigframe(ka, regs,frame_size); if (!access_ok(VERIFY_WRITE, frame,frame_size)) return 0; err = save_sigregs(regs,&frame->sregs); if(!err) err=__put_user(&frame->sregs,&frame->sc.sregs); if(!err) err=__copy_to_user(&frame->sc.oldmask,&set->sig,SIGMASK_COPY_SIZE); if(!err) { regs->gprs[2]=(current->exec_domain && current->exec_domain->signal_invmap && sig < 32 ? current->exec_domain->signal_invmap[sig] : sig); /* Set up registers for signal handler */ regs->gprs[15] = (addr_t)frame; regs->psw.addr = FIX_PSW(ka->sa.sa_handler); } /* Set up to return from userspace. If provided, use a stub already in userspace. */ if (ka->sa.sa_flags & SA_RESTORER) { regs->gprs[14] = FIX_PSW(ka->sa.sa_restorer); } else { regs->gprs[14] = FIX_PSW(frame->retcode); err |= __put_user(retcode, (u16 *)(frame->retcode)); } return(err ? 0:frame); }
static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs) { struct rt_sigframe __user *frame; unsigned long uc_flags, restorer; size_t frame_size; frame_size = sizeof(struct rt_sigframe) - sizeof(_sigregs_ext); /* * gprs_high are only present for a 31-bit task running on * a 64-bit kernel (see compat_signal.c) but the space for * gprs_high need to be allocated if vector registers are * included in the signal frame on a 31-bit system. */ uc_flags = 0; #ifdef CONFIG_64BIT if (MACHINE_HAS_VX) { frame_size += sizeof(_sigregs_ext); if (current->thread.vxrs) uc_flags |= UC_VXRS; } #endif frame = get_sigframe(&ksig->ka, regs, frame_size); if (frame == (void __user *) -1UL) return -EFAULT; /* Set up backchain. */ if (__put_user(regs->gprs[15], (addr_t __user *) frame)) return -EFAULT; /* Set up to return from userspace. If provided, use a stub already in userspace. */ if (ksig->ka.sa.sa_flags & SA_RESTORER) { restorer = (unsigned long) ksig->ka.sa.sa_restorer | PSW_ADDR_AMODE; } else { __u16 __user *svc = &frame->svc_insn; if (__put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn, svc)) return -EFAULT; restorer = (unsigned long) svc | PSW_ADDR_AMODE; } /* Create siginfo on the signal stack */ if (copy_siginfo_to_user(&frame->info, &ksig->info)) return -EFAULT; /* Store registers needed to create the signal frame */ store_sigregs(); /* Create ucontext on the signal stack. */ if (__put_user(uc_flags, &frame->uc.uc_flags) || __put_user(NULL, &frame->uc.uc_link) || __save_altstack(&frame->uc.uc_stack, regs->gprs[15]) || save_sigregs(regs, &frame->uc.uc_mcontext) || __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)) || save_sigregs_ext(regs, &frame->uc.uc_mcontext_ext)) return -EFAULT; /* Set up registers for signal handler */ regs->gprs[14] = restorer; regs->gprs[15] = (unsigned long) frame; /* Force default amode and default user address space control. */ regs->psw.mask = PSW_MASK_EA | PSW_MASK_BA | (PSW_USER_BITS & PSW_MASK_ASC) | (regs->psw.mask & ~PSW_MASK_ASC); regs->psw.addr = (unsigned long) ksig->ka.sa.sa_handler | PSW_ADDR_AMODE; regs->gprs[2] = map_signal(ksig->sig); regs->gprs[3] = (unsigned long) &frame->info; regs->gprs[4] = (unsigned long) &frame->uc; regs->gprs[5] = task_thread_info(current)->last_break; return 0; }
static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set, struct pt_regs * regs) { struct sigframe __user *frame; struct sigcontext sc; unsigned long restorer; size_t frame_size; /* * gprs_high are only present for a 31-bit task running on * a 64-bit kernel (see compat_signal.c) but the space for * gprs_high need to be allocated if vector registers are * included in the signal frame on a 31-bit system. */ frame_size = sizeof(*frame) - sizeof(frame->sregs_ext); if (MACHINE_HAS_VX) frame_size += sizeof(frame->sregs_ext); frame = get_sigframe(ka, regs, frame_size); if (frame == (void __user *) -1UL) return -EFAULT; /* Set up backchain. */ if (__put_user(regs->gprs[15], (addr_t __user *) frame)) return -EFAULT; /* Create struct sigcontext on the signal stack */ memcpy(&sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE); sc.sregs = (_sigregs __user __force *) &frame->sregs; if (__copy_to_user(&frame->sc, &sc, sizeof(frame->sc))) return -EFAULT; /* Store registers needed to create the signal frame */ store_sigregs(); /* Create _sigregs on the signal stack */ if (save_sigregs(regs, &frame->sregs)) return -EFAULT; /* Place signal number on stack to allow backtrace from handler. */ if (__put_user(regs->gprs[2], (int __user *) &frame->signo)) return -EFAULT; /* Create _sigregs_ext on the signal stack */ if (save_sigregs_ext(regs, &frame->sregs_ext)) return -EFAULT; /* Set up to return from userspace. If provided, use a stub already in userspace. */ if (ka->sa.sa_flags & SA_RESTORER) { restorer = (unsigned long) ka->sa.sa_restorer | PSW_ADDR_AMODE; } else { /* Signal frame without vector registers are short ! */ __u16 __user *svc = (void __user *) frame + frame_size - 2; if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn, svc)) return -EFAULT; restorer = (unsigned long) svc | PSW_ADDR_AMODE; } /* Set up registers for signal handler */ regs->gprs[14] = restorer; regs->gprs[15] = (unsigned long) frame; /* Force default amode and default user address space control. */ regs->psw.mask = PSW_MASK_EA | PSW_MASK_BA | (PSW_USER_BITS & PSW_MASK_ASC) | (regs->psw.mask & ~PSW_MASK_ASC); regs->psw.addr = (unsigned long) ka->sa.sa_handler | PSW_ADDR_AMODE; regs->gprs[2] = map_signal(sig); regs->gprs[3] = (unsigned long) &frame->sc; /* We forgot to include these in the sigcontext. To avoid breaking binary compatibility, they are passed as args. */ if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL || sig == SIGTRAP || sig == SIGFPE) { /* set extra registers only for synchronous signals */ regs->gprs[4] = regs->int_code & 127; regs->gprs[5] = regs->int_parm_long; regs->gprs[6] = task_thread_info(current)->last_break; } return 0; }
static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set, struct pt_regs * regs) { sigframe __user *frame; frame = get_sigframe(ka, regs, sizeof(sigframe)); if (frame == (void __user *) -1UL) goto give_sigsegv; if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE)) goto give_sigsegv; if (save_sigregs(regs, &frame->sregs)) goto give_sigsegv; if (__put_user(&frame->sregs, &frame->sc.sregs)) goto give_sigsegv; /* Set up to return from userspace. If provided, use a stub already in userspace. */ if (ka->sa.sa_flags & SA_RESTORER) { regs->gprs[14] = (unsigned long) ka->sa.sa_restorer | PSW_ADDR_AMODE; } else { regs->gprs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE; if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn, (u16 __user *)(frame->retcode))) goto give_sigsegv; } /* Set up backchain. */ if (__put_user(regs->gprs[15], (addr_t __user *) frame)) goto give_sigsegv; /* Set up registers for signal handler */ regs->gprs[15] = (unsigned long) frame; /* Force default amode and default user address space control. */ regs->psw.mask = PSW_MASK_EA | PSW_MASK_BA | (PSW_USER_BITS & PSW_MASK_ASC) | (regs->psw.mask & ~PSW_MASK_ASC); regs->psw.addr = (unsigned long) ka->sa.sa_handler | PSW_ADDR_AMODE; regs->gprs[2] = map_signal(sig); regs->gprs[3] = (unsigned long) &frame->sc; /* We forgot to include these in the sigcontext. To avoid breaking binary compatibility, they are passed as args. */ if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL || sig == SIGTRAP || sig == SIGFPE) { /* set extra registers only for synchronous signals */ regs->gprs[4] = regs->int_code & 127; regs->gprs[5] = regs->int_parm_long; regs->gprs[6] = task_thread_info(current)->last_break; } /* Place signal number on stack to allow backtrace from handler. */ if (__put_user(regs->gprs[2], (int __user *) &frame->signo)) goto give_sigsegv; return 0; give_sigsegv: force_sigsegv(sig, current); return -EFAULT; }