compat_signal.c revision efee984c27b67e3ebef40410f35671997441b57c
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 254dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens * arch/s390/kernel/compat_signal.c 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 454dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens * Copyright (C) IBM Corp. 2000,2006 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Gerhard Tonn (ton@de.ibm.com) 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 1991, 1992 Linus Torvalds 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/compat.h> 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sched.h> 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/smp.h> 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/signal.h> 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/wait.h> 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/ptrace.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/unistd.h> 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/stddef.h> 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/tty.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/personality.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/binfmts.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/ucontext.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/lowcore.h> 30a0616cdebcfd575dcd4c46102d1b52fbb827fc29David Howells#include <asm/switch_to.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "compat_linux.h" 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "compat_ptrace.h" 33a806170e29c5468b1d641a22518243bdf1b8d58bHeiko Carstens#include "entry.h" 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldstypedef struct 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __u8 callee_used_stack[__SIGNAL_FRAMESIZE32]; 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct sigcontext32 sc; 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _sigregs32 sregs; 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int signo; 41ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens __u32 gprs_high[NUM_GPRS]; 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __u8 retcode[S390_SYSCALL_SIZE]; 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} sigframe32; 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldstypedef struct 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __u8 callee_used_stack[__SIGNAL_FRAMESIZE32]; 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __u8 retcode[S390_SYSCALL_SIZE]; 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds compat_siginfo_t info; 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ucontext32 uc; 51ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens __u32 gprs_high[NUM_GPRS]; 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} rt_sigframe32; 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok (VERIFY_WRITE, to, sizeof(compat_siginfo_t))) 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If you change siginfo_t structure, please be sure 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds this code is fixed accordingly. 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds It should never copy any pad contained in the structure 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds to avoid security leaks, but must copy the generic 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3 ints plus the relevant union member. 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds This routine must convert siginfo from 64bit to 32bit as well 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds at the same time. */ 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __put_user(from->si_signo, &to->si_signo); 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_errno, &to->si_errno); 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user((short)from->si_code, &to->si_code); 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (from->si_code < 0) 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (from->si_code >> 16) { 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_MESGQ >> 16: 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_int, &to->si_int); 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* fallthrough */ 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_KILL >> 16: 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_pid, &to->si_pid); 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_uid, &to->si_uid); 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_CHLD >> 16: 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_pid, &to->si_pid); 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_uid, &to->si_uid); 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_utime, &to->si_utime); 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_stime, &to->si_stime); 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_status, &to->si_status); 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_FAULT >> 16: 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user((unsigned long) from->si_addr, 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &to->si_addr); 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_POLL >> 16: 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_band, &to->si_band); 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_fd, &to->si_fd); 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_TIMER >> 16: 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_tid, &to->si_tid); 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_overrun, &to->si_overrun); 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_int, &to->si_int); 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 tmp; 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok (VERIFY_READ, from, sizeof(compat_siginfo_t))) 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __get_user(to->si_signo, &from->si_signo); 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_errno, &from->si_errno); 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_code, &from->si_code); 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (to->si_code < 0) 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __copy_from_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (to->si_code >> 16) { 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_MESGQ >> 16: 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_int, &from->si_int); 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* fallthrough */ 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_KILL >> 16: 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_pid, &from->si_pid); 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_uid, &from->si_uid); 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_CHLD >> 16: 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_pid, &from->si_pid); 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_uid, &from->si_uid); 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_utime, &from->si_utime); 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_stime, &from->si_stime); 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_status, &from->si_status); 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_FAULT >> 16: 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(tmp, &from->si_addr); 1433c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky to->si_addr = (void __force __user *) 1443c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky (u64) (tmp & PSW32_ADDR_INSN); 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_POLL >> 16: 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_band, &from->si_band); 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_fd, &from->si_fd); 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_TIMER >> 16: 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_tid, &from->si_tid); 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_overrun, &from->si_overrun); 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_int, &from->si_int); 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsasmlinkage long 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssys32_sigaction(int sig, const struct old_sigaction32 __user *act, 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct old_sigaction32 __user *oact) 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct k_sigaction new_ka, old_ka; 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long sa_handler, sa_restorer; 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret; 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (act) { 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds compat_old_sigset_t mask; 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_READ, act, sizeof(*act)) || 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __get_user(sa_handler, &act->sa_handler) || 17412bae23507129a7337378e6433bff6f8696bdb45Heiko Carstens __get_user(sa_restorer, &act->sa_restorer) || 17512bae23507129a7337378e6433bff6f8696bdb45Heiko Carstens __get_user(new_ka.sa.sa_flags, &act->sa_flags) || 17612bae23507129a7337378e6433bff6f8696bdb45Heiko Carstens __get_user(mask, &act->sa_mask)) 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_ka.sa.sa_handler = (__sighandler_t) sa_handler; 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_ka.sa.sa_restorer = (void (*)(void)) sa_restorer; 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds siginitset(&new_ka.sa.sa_mask, mask); 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ret && oact) { 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_handler = (unsigned long) old_ka.sa.sa_handler; 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_restorer = (unsigned long) old_ka.sa.sa_restorer; 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __put_user(sa_handler, &oact->sa_handler) || 19012bae23507129a7337378e6433bff6f8696bdb45Heiko Carstens __put_user(sa_restorer, &oact->sa_restorer) || 19112bae23507129a7337378e6433bff6f8696bdb45Heiko Carstens __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || 19212bae23507129a7337378e6433bff6f8696bdb45Heiko Carstens __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsasmlinkage long 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssys32_rt_sigaction(int sig, const struct sigaction32 __user *act, 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct sigaction32 __user *oact, size_t sigsetsize) 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct k_sigaction new_ka, old_ka; 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long sa_handler; 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret; 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds compat_sigset_t set32; 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* XXX: Don't preclude handling different sized sigset_t's. */ 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sigsetsize != sizeof(compat_sigset_t)) 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (act) { 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = get_user(sa_handler, &act->sa_handler); 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret |= __copy_from_user(&set32, &act->sa_mask, 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(compat_sigset_t)); 216399c1d8dbfdcf46977fd2e2a833b02e18a284810Martin Schwidefsky new_ka.sa.sa_mask.sig[0] = 217399c1d8dbfdcf46977fd2e2a833b02e18a284810Martin Schwidefsky set32.sig[0] | (((long)set32.sig[1]) << 32); 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags); 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_ka.sa.sa_handler = (__sighandler_t) sa_handler; 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ret && oact) { 228399c1d8dbfdcf46977fd2e2a833b02e18a284810Martin Schwidefsky set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); 229399c1d8dbfdcf46977fd2e2a833b02e18a284810Martin Schwidefsky set32.sig[0] = old_ka.sa.sa_mask.sig[0]; 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = put_user((unsigned long)old_ka.sa.sa_handler, &oact->sa_handler); 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret |= __copy_to_user(&oact->sa_mask, &set32, 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(compat_sigset_t)); 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsasmlinkage long 24003ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefskysys32_sigaltstack(const stack_t32 __user *uss, stack_t32 __user *uoss) 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 24203ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefsky struct pt_regs *regs = task_pt_regs(current); 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stack_t kss, koss; 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long ss_sp; 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret, err = 0; 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mm_segment_t old_fs = get_fs(); 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (uss) { 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_READ, uss, sizeof(*uss))) 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(ss_sp, &uss->ss_sp); 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(kss.ss_size, &uss->ss_size); 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(kss.ss_flags, &uss->ss_flags); 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 256c28144763a7dcdceb2c16a5ac9c8e0022d547d28Al Viro kss.ss_sp = (void __user *) ss_sp; 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_fs (KERNEL_DS); 2602b67fc46061b2171fb8fbb55d1ac717abd533569Heiko Carstens ret = do_sigaltstack((stack_t __force __user *) (uss ? &kss : NULL), 2612b67fc46061b2171fb8fbb55d1ac717abd533569Heiko Carstens (stack_t __force __user *) (uoss ? &koss : NULL), 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[15]); 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_fs (old_fs); 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ret && uoss) { 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))) 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ss_sp = (unsigned long) koss.ss_sp; 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(ss_sp, &uoss->ss_sp); 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(koss.ss_size, &uoss->ss_size); 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(koss.ss_flags, &uoss->ss_flags); 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int save_sigregs32(struct pt_regs *regs, _sigregs32 __user *sregs) 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _s390_regs_common32 regs32; 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err, i; 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 283b50511e41aa51a89b4176784a670582424bc7db6Martin Schwidefsky regs32.psw.mask = psw32_user_bits | 284b50511e41aa51a89b4176784a670582424bc7db6Martin Schwidefsky ((__u32)(regs->psw.mask >> 32) & PSW32_MASK_USER); 285d4e81b35b882d96f059afdb0f98e5b6025973b09Martin Schwidefsky regs32.psw.addr = (__u32) regs->psw.addr | 286d4e81b35b882d96f059afdb0f98e5b6025973b09Martin Schwidefsky (__u32)(regs->psw.mask & PSW_MASK_BA); 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_GPRS; i++) 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs32.gprs[i] = (__u32) regs->gprs[i]; 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds save_access_regs(current->thread.acrs); 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(regs32.acrs, current->thread.acrs, sizeof(regs32.acrs)); 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __copy_to_user(&sregs->regs, ®s32, sizeof(regs32)); 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds save_fp_regs(¤t->thread.fp_regs); 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* s390_fp_regs and _s390_fp_regs32 are the same ! */ 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return __copy_to_user(&sregs->fpregs, ¤t->thread.fp_regs, 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(_s390_fp_regs32)); 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs) 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _s390_regs_common32 regs32; 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err, i; 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Alwys make any pending restarted system call return -EINTR */ 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds current_thread_info()->restart_block.fn = do_no_restart_syscall; 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __copy_from_user(®s32, &sregs->regs, sizeof(regs32)); 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 311b50511e41aa51a89b4176784a670582424bc7db6Martin Schwidefsky regs->psw.mask = (regs->psw.mask & ~PSW_MASK_USER) | 312d4e81b35b882d96f059afdb0f98e5b6025973b09Martin Schwidefsky (__u64)(regs32.psw.mask & PSW32_MASK_USER) << 32 | 313d4e81b35b882d96f059afdb0f98e5b6025973b09Martin Schwidefsky (__u64)(regs32.psw.addr & PSW32_ADDR_AMODE); 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->psw.addr = (__u64)(regs32.psw.addr & PSW32_ADDR_INSN); 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_GPRS; i++) 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[i] = (__u64) regs32.gprs[i]; 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(current->thread.acrs, regs32.acrs, sizeof(current->thread.acrs)); 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds restore_access_regs(current->thread.acrs); 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __copy_from_user(¤t->thread.fp_regs, &sregs->fpregs, 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(_s390_fp_regs32)); 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds current->thread.fp_regs.fpc &= FPC_VALID_MASK; 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds restore_fp_regs(¤t->thread.fp_regs); 327b6ef5bb3d93efb95ba855a628740375c2280a59eMartin Schwidefsky clear_thread_flag(TIF_SYSCALL); /* No longer in a system call */ 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 331ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstensstatic int save_sigregs_gprs_high(struct pt_regs *regs, __u32 __user *uregs) 332ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens{ 333ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens __u32 gprs_high[NUM_GPRS]; 334ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens int i; 335ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens 336ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens for (i = 0; i < NUM_GPRS; i++) 337ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens gprs_high[i] = regs->gprs[i] >> 32; 338ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens 339ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens return __copy_to_user(uregs, &gprs_high, sizeof(gprs_high)); 340ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens} 341ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens 342ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstensstatic int restore_sigregs_gprs_high(struct pt_regs *regs, __u32 __user *uregs) 343ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens{ 344ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens __u32 gprs_high[NUM_GPRS]; 345ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens int err, i; 346ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens 347ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens err = __copy_from_user(&gprs_high, uregs, sizeof(gprs_high)); 348ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens if (err) 349ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens return err; 350ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens for (i = 0; i < NUM_GPRS; i++) 351ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens *(__u32 *)®s->gprs[i] = gprs_high[i]; 352ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens return 0; 353ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens} 354ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens 35503ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefskyasmlinkage long sys32_sigreturn(void) 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 35703ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefsky struct pt_regs *regs = task_pt_regs(current); 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigframe32 __user *frame = (sigframe32 __user *)regs->gprs[15]; 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigset_t set; 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__copy_from_user(&set.sig, &frame->sc.oldmask, _SIGMASK_COPY_SIZE32)) 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 365391c62feb1798b6d31bd88076eae649b091ad8bfHeiko Carstens set_current_blocked(&set); 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (restore_sigregs32(regs, &frame->sregs)) 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 368ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens if (restore_sigregs_gprs_high(regs, frame->gprs_high)) 369ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens goto badframe; 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return regs->gprs[2]; 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsbadframe: 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sig(SIGSEGV, current); 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37603ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefskyasmlinkage long sys32_rt_sigreturn(void) 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 37803ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefsky struct pt_regs *regs = task_pt_regs(current); 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rt_sigframe32 __user *frame = (rt_sigframe32 __user *)regs->gprs[15]; 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigset_t set; 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stack_t st; 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __u32 ss_sp; 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mm_segment_t old_fs = get_fs(); 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 390391c62feb1798b6d31bd88076eae649b091ad8bfHeiko Carstens set_current_blocked(&set); 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (restore_sigregs32(regs, &frame->uc.uc_mcontext)) 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 393ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens if (restore_sigregs_gprs_high(regs, frame->gprs_high)) 394ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens goto badframe; 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __get_user(ss_sp, &frame->uc.uc_stack.ss_sp); 396c28144763a7dcdceb2c16a5ac9c8e0022d547d28Al Viro st.ss_sp = compat_ptr(ss_sp); 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(st.ss_size, &frame->uc.uc_stack.ss_size); 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(st.ss_flags, &frame->uc.uc_stack.ss_flags); 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_fs (KERNEL_DS); 4022b67fc46061b2171fb8fbb55d1ac717abd533569Heiko Carstens do_sigaltstack((stack_t __force __user *)&st, NULL, regs->gprs[15]); 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_fs (old_fs); 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return regs->gprs[2]; 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsbadframe: 40603ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefsky force_sig(SIGSEGV, current); 40703ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefsky return 0; 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Set up a signal frame. 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Determine which stack to use.. 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void __user * 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsget_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size) 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long sp; 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Default to using normal stack */ 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sp = (unsigned long) A(regs->gprs[15]); 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 426de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens /* Overflow on alternate signal stack gives SIGSEGV. */ 427de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens if (on_sig_stack(sp) && !on_sig_stack((sp - frame_size) & -8UL)) 428de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens return (void __user *) -1UL; 429de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* This is the X/Open sanctioned signal stack switching. */ 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ka->sa.sa_flags & SA_ONSTACK) { 43228f223782bca914ae65d08234c57c2175ecd7f5dLaurent Meyer if (! sas_ss_flags(sp)) 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sp = current->sas_ss_sp + current->sas_ss_size; 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (void __user *)((sp - frame_size) & -8ul); 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int map_signal(int sig) 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (current_thread_info()->exec_domain 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && current_thread_info()->exec_domain->signal_invmap 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && sig < 32) 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return current_thread_info()->exec_domain->signal_invmap[sig]; 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return sig; 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44954dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstensstatic int setup_frame32(int sig, struct k_sigaction *ka, 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigset_t *set, struct pt_regs * regs) 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(sigframe32)); 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_WRITE, frame, sizeof(sigframe32))) 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 456de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens if (frame == (void __user *) -1UL) 457de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens goto give_sigsegv; 458de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE32)) 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (save_sigregs32(regs, &frame->sregs)) 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 464ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens if (save_sigregs_gprs_high(regs, frame->gprs_high)) 465ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens goto give_sigsegv; 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__put_user((unsigned long) &frame->sregs, &frame->sc.sregs)) 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up to return from userspace. If provided, use a stub 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds already in userspace. */ 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ka->sa.sa_flags & SA_RESTORER) { 472d4e81b35b882d96f059afdb0f98e5b6025973b09Martin Schwidefsky regs->gprs[14] = (__u64) ka->sa.sa_restorer | PSW32_ADDR_AMODE; 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 474d4e81b35b882d96f059afdb0f98e5b6025973b09Martin Schwidefsky regs->gprs[14] = (__u64) frame->retcode | PSW32_ADDR_AMODE; 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn, 4763c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky (u16 __force __user *)(frame->retcode))) 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up backchain. */ 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__put_user(regs->gprs[15], (unsigned int __user *) frame)) 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up registers for signal handler */ 4853c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky regs->gprs[15] = (__force __u64) frame; 486d4e81b35b882d96f059afdb0f98e5b6025973b09Martin Schwidefsky regs->psw.mask |= PSW_MASK_BA; /* force amode 31 */ 4873c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky regs->psw.addr = (__force __u64) ka->sa.sa_handler; 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[2] = map_signal(sig); 4903c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky regs->gprs[3] = (__force __u64) &frame->sc; 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We forgot to include these in the sigcontext. 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds To avoid breaking binary compatibility, they are passed as args. */ 494aa33c8cbbae2eb98489a3a363099b362146a8f4cMartin Schwidefsky if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL || 495aa33c8cbbae2eb98489a3a363099b362146a8f4cMartin Schwidefsky sig == SIGTRAP || sig == SIGFPE) { 496aa33c8cbbae2eb98489a3a363099b362146a8f4cMartin Schwidefsky /* set extra registers only for synchronous signals */ 497aa33c8cbbae2eb98489a3a363099b362146a8f4cMartin Schwidefsky regs->gprs[4] = regs->int_code & 127; 498aa33c8cbbae2eb98489a3a363099b362146a8f4cMartin Schwidefsky regs->gprs[5] = regs->int_parm_long; 499aa33c8cbbae2eb98489a3a363099b362146a8f4cMartin Schwidefsky } 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Place signal number on stack to allow backtrace from handler. */ 5023c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky if (__put_user(regs->gprs[2], (int __force __user *) &frame->signo)) 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 50454dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens return 0; 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgive_sigsegv: 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sigsegv(sig, current); 50854dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens return -EFAULT; 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 51154dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstensstatic int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info, 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigset_t *set, struct pt_regs * regs) 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rt_sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(rt_sigframe32)); 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_WRITE, frame, sizeof(rt_sigframe32))) 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 519de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens if (frame == (void __user *) -1UL) 520de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens goto give_sigsegv; 521de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_siginfo_to_user32(&frame->info, info)) 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Create the ucontext. */ 526ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens err |= __put_user(UC_EXTENDED, &frame->uc.uc_flags); 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(0, &frame->uc.uc_link); 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp); 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(sas_ss_flags(regs->gprs[15]), 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &frame->uc.uc_stack.ss_flags); 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= save_sigregs32(regs, &frame->uc.uc_mcontext); 533ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens err |= save_sigregs_gprs_high(regs, frame->gprs_high); 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up to return from userspace. If provided, use a stub 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds already in userspace. */ 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ka->sa.sa_flags & SA_RESTORER) { 541207a05499bf11216ac96f76b38be728f4ee49304Martin Schwidefsky regs->gprs[14] = (__u64) ka->sa.sa_restorer | PSW32_ADDR_AMODE; 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 543207a05499bf11216ac96f76b38be728f4ee49304Martin Schwidefsky regs->gprs[14] = (__u64) frame->retcode | PSW32_ADDR_AMODE; 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn, 5453c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky (u16 __force __user *)(frame->retcode)); 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up backchain. */ 5493c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky if (__put_user(regs->gprs[15], (unsigned int __force __user *) frame)) 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up registers for signal handler */ 5533c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky regs->gprs[15] = (__force __u64) frame; 554d4e81b35b882d96f059afdb0f98e5b6025973b09Martin Schwidefsky regs->psw.mask |= PSW_MASK_BA; /* force amode 31 */ 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->psw.addr = (__u64) ka->sa.sa_handler; 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[2] = map_signal(sig); 5583c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky regs->gprs[3] = (__force __u64) &frame->info; 5593c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky regs->gprs[4] = (__force __u64) &frame->uc; 56054dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens return 0; 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgive_sigsegv: 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sigsegv(sig, current); 56454dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens return -EFAULT; 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * OK, we're invoking a handler 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 571a610d6e672d6d3723e8da257ad4a8a288a8f2f89Al Virovoid handle_signal32(unsigned long sig, struct k_sigaction *ka, 572391c62feb1798b6d31bd88076eae649b091ad8bfHeiko Carstens siginfo_t *info, sigset_t *oldset, struct pt_regs *regs) 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 57454dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens int ret; 57554dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up the stack frame */ 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ka->sa.sa_flags & SA_SIGINFO) 57854dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens ret = setup_rt_frame32(sig, ka, info, oldset, regs); 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 58054dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens ret = setup_frame32(sig, ka, oldset, regs); 581391c62feb1798b6d31bd88076eae649b091ad8bfHeiko Carstens if (ret) 582a610d6e672d6d3723e8da257ad4a8a288a8f2f89Al Viro return; 583efee984c27b67e3ebef40410f35671997441b57cAl Viro signal_delivered(sig, info, ka, regs, 584a610d6e672d6d3723e8da257ad4a8a288a8f2f89Al Viro test_thread_flag(TIF_SINGLE_STEP)); 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 587