compat_signal.c revision e214125aa8c0546b24dabf6f47b28c5e20133d1d
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2a53c8fab3f87c995c30ac226a03af95361243144Heiko Carstens * Copyright IBM Corp. 2000, 2006 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Gerhard Tonn (ton@de.ibm.com) 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 1991, 1992 Linus Torvalds 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/compat.h> 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sched.h> 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/smp.h> 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/signal.h> 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h> 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/wait.h> 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/ptrace.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/unistd.h> 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/stddef.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/tty.h> 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/personality.h> 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/binfmts.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/ucontext.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/lowcore.h> 28a0616cdebcfd575dcd4c46102d1b52fbb827fc29David Howells#include <asm/switch_to.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "compat_linux.h" 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "compat_ptrace.h" 31a806170e29c5468b1d641a22518243bdf1b8d58bHeiko Carstens#include "entry.h" 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldstypedef struct 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __u8 callee_used_stack[__SIGNAL_FRAMESIZE32]; 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct sigcontext32 sc; 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _sigregs32 sregs; 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int signo; 39ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens __u32 gprs_high[NUM_GPRS]; 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __u8 retcode[S390_SYSCALL_SIZE]; 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} sigframe32; 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldstypedef struct 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __u8 callee_used_stack[__SIGNAL_FRAMESIZE32]; 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __u8 retcode[S390_SYSCALL_SIZE]; 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds compat_siginfo_t info; 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ucontext32 uc; 49ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens __u32 gprs_high[NUM_GPRS]; 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} rt_sigframe32; 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok (VERIFY_WRITE, to, sizeof(compat_siginfo_t))) 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If you change siginfo_t structure, please be sure 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds this code is fixed accordingly. 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds It should never copy any pad contained in the structure 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds to avoid security leaks, but must copy the generic 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3 ints plus the relevant union member. 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds This routine must convert siginfo from 64bit to 32bit as well 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds at the same time. */ 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __put_user(from->si_signo, &to->si_signo); 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_errno, &to->si_errno); 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user((short)from->si_code, &to->si_code); 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (from->si_code < 0) 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (from->si_code >> 16) { 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_MESGQ >> 16: 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_int, &to->si_int); 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* fallthrough */ 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_KILL >> 16: 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_pid, &to->si_pid); 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_uid, &to->si_uid); 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_CHLD >> 16: 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_pid, &to->si_pid); 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_uid, &to->si_uid); 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_utime, &to->si_utime); 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_stime, &to->si_stime); 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_status, &to->si_status); 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_FAULT >> 16: 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user((unsigned long) from->si_addr, 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &to->si_addr); 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_POLL >> 16: 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_band, &to->si_band); 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_fd, &to->si_fd); 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_TIMER >> 16: 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_tid, &to->si_tid); 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_overrun, &to->si_overrun); 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_int, &to->si_int); 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 tmp; 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok (VERIFY_READ, from, sizeof(compat_siginfo_t))) 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __get_user(to->si_signo, &from->si_signo); 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_errno, &from->si_errno); 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_code, &from->si_code); 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (to->si_code < 0) 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __copy_from_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (to->si_code >> 16) { 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_MESGQ >> 16: 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_int, &from->si_int); 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* fallthrough */ 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_KILL >> 16: 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_pid, &from->si_pid); 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_uid, &from->si_uid); 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_CHLD >> 16: 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_pid, &from->si_pid); 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_uid, &from->si_uid); 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_utime, &from->si_utime); 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_stime, &from->si_stime); 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_status, &from->si_status); 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_FAULT >> 16: 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(tmp, &from->si_addr); 1413c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky to->si_addr = (void __force __user *) 1423c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky (u64) (tmp & PSW32_ADDR_INSN); 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_POLL >> 16: 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_band, &from->si_band); 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_fd, &from->si_fd); 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_TIMER >> 16: 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_tid, &from->si_tid); 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_overrun, &from->si_overrun); 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_int, &from->si_int); 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsasmlinkage long 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssys32_sigaction(int sig, const struct old_sigaction32 __user *act, 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct old_sigaction32 __user *oact) 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct k_sigaction new_ka, old_ka; 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long sa_handler, sa_restorer; 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret; 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (act) { 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds compat_old_sigset_t mask; 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_READ, act, sizeof(*act)) || 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __get_user(sa_handler, &act->sa_handler) || 17212bae23507129a7337378e6433bff6f8696bdb45Heiko Carstens __get_user(sa_restorer, &act->sa_restorer) || 17312bae23507129a7337378e6433bff6f8696bdb45Heiko Carstens __get_user(new_ka.sa.sa_flags, &act->sa_flags) || 17412bae23507129a7337378e6433bff6f8696bdb45Heiko Carstens __get_user(mask, &act->sa_mask)) 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_ka.sa.sa_handler = (__sighandler_t) sa_handler; 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_ka.sa.sa_restorer = (void (*)(void)) sa_restorer; 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds siginitset(&new_ka.sa.sa_mask, mask); 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ret && oact) { 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_handler = (unsigned long) old_ka.sa.sa_handler; 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sa_restorer = (unsigned long) old_ka.sa.sa_restorer; 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __put_user(sa_handler, &oact->sa_handler) || 18812bae23507129a7337378e6433bff6f8696bdb45Heiko Carstens __put_user(sa_restorer, &oact->sa_restorer) || 18912bae23507129a7337378e6433bff6f8696bdb45Heiko Carstens __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || 19012bae23507129a7337378e6433bff6f8696bdb45Heiko Carstens __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsasmlinkage long 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssys32_rt_sigaction(int sig, const struct sigaction32 __user *act, 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct sigaction32 __user *oact, size_t sigsetsize) 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct k_sigaction new_ka, old_ka; 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long sa_handler; 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret; 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds compat_sigset_t set32; 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* XXX: Don't preclude handling different sized sigset_t's. */ 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sigsetsize != sizeof(compat_sigset_t)) 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (act) { 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = get_user(sa_handler, &act->sa_handler); 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret |= __copy_from_user(&set32, &act->sa_mask, 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(compat_sigset_t)); 214399c1d8dbfdcf46977fd2e2a833b02e18a284810Martin Schwidefsky new_ka.sa.sa_mask.sig[0] = 215399c1d8dbfdcf46977fd2e2a833b02e18a284810Martin Schwidefsky set32.sig[0] | (((long)set32.sig[1]) << 32); 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags); 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_ka.sa.sa_handler = (__sighandler_t) sa_handler; 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ret && oact) { 226399c1d8dbfdcf46977fd2e2a833b02e18a284810Martin Schwidefsky set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); 227399c1d8dbfdcf46977fd2e2a833b02e18a284810Martin Schwidefsky set32.sig[0] = old_ka.sa.sa_mask.sig[0]; 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = put_user((unsigned long)old_ka.sa.sa_handler, &oact->sa_handler); 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret |= __copy_to_user(&oact->sa_mask, &set32, 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(compat_sigset_t)); 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int save_sigregs32(struct pt_regs *regs, _sigregs32 __user *sregs) 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _s390_regs_common32 regs32; 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err, i; 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 242b50511e41aa51a89b4176784a670582424bc7db6Martin Schwidefsky regs32.psw.mask = psw32_user_bits | 243b50511e41aa51a89b4176784a670582424bc7db6Martin Schwidefsky ((__u32)(regs->psw.mask >> 32) & PSW32_MASK_USER); 244d4e81b35b882d96f059afdb0f98e5b6025973b09Martin Schwidefsky regs32.psw.addr = (__u32) regs->psw.addr | 245d4e81b35b882d96f059afdb0f98e5b6025973b09Martin Schwidefsky (__u32)(regs->psw.mask & PSW_MASK_BA); 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_GPRS; i++) 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs32.gprs[i] = (__u32) regs->gprs[i]; 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds save_access_regs(current->thread.acrs); 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(regs32.acrs, current->thread.acrs, sizeof(regs32.acrs)); 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __copy_to_user(&sregs->regs, ®s32, sizeof(regs32)); 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds save_fp_regs(¤t->thread.fp_regs); 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* s390_fp_regs and _s390_fp_regs32 are the same ! */ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return __copy_to_user(&sregs->fpregs, ¤t->thread.fp_regs, 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(_s390_fp_regs32)); 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs) 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _s390_regs_common32 regs32; 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err, i; 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Alwys make any pending restarted system call return -EINTR */ 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds current_thread_info()->restart_block.fn = do_no_restart_syscall; 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __copy_from_user(®s32, &sregs->regs, sizeof(regs32)); 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 270b50511e41aa51a89b4176784a670582424bc7db6Martin Schwidefsky regs->psw.mask = (regs->psw.mask & ~PSW_MASK_USER) | 271d4e81b35b882d96f059afdb0f98e5b6025973b09Martin Schwidefsky (__u64)(regs32.psw.mask & PSW32_MASK_USER) << 32 | 272d4e81b35b882d96f059afdb0f98e5b6025973b09Martin Schwidefsky (__u64)(regs32.psw.addr & PSW32_ADDR_AMODE); 273fa968ee215c0ca91e4a9c3a69ac2405aae6e5d2fMartin Schwidefsky /* Check for invalid user address space control. */ 274fa968ee215c0ca91e4a9c3a69ac2405aae6e5d2fMartin Schwidefsky if ((regs->psw.mask & PSW_MASK_ASC) >= (psw_kernel_bits & PSW_MASK_ASC)) 275fa968ee215c0ca91e4a9c3a69ac2405aae6e5d2fMartin Schwidefsky regs->psw.mask = (psw_user_bits & PSW_MASK_ASC) | 276fa968ee215c0ca91e4a9c3a69ac2405aae6e5d2fMartin Schwidefsky (regs->psw.mask & ~PSW_MASK_ASC); 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->psw.addr = (__u64)(regs32.psw.addr & PSW32_ADDR_INSN); 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_GPRS; i++) 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[i] = (__u64) regs32.gprs[i]; 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(current->thread.acrs, regs32.acrs, sizeof(current->thread.acrs)); 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds restore_access_regs(current->thread.acrs); 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __copy_from_user(¤t->thread.fp_regs, &sregs->fpregs, 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(_s390_fp_regs32)); 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds current->thread.fp_regs.fpc &= FPC_VALID_MASK; 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds restore_fp_regs(¤t->thread.fp_regs); 290b6ef5bb3d93efb95ba855a628740375c2280a59eMartin Schwidefsky clear_thread_flag(TIF_SYSCALL); /* No longer in a system call */ 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 294ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstensstatic int save_sigregs_gprs_high(struct pt_regs *regs, __u32 __user *uregs) 295ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens{ 296ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens __u32 gprs_high[NUM_GPRS]; 297ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens int i; 298ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens 299ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens for (i = 0; i < NUM_GPRS; i++) 300ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens gprs_high[i] = regs->gprs[i] >> 32; 301ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens 302ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens return __copy_to_user(uregs, &gprs_high, sizeof(gprs_high)); 303ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens} 304ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens 305ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstensstatic int restore_sigregs_gprs_high(struct pt_regs *regs, __u32 __user *uregs) 306ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens{ 307ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens __u32 gprs_high[NUM_GPRS]; 308ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens int err, i; 309ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens 310ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens err = __copy_from_user(&gprs_high, uregs, sizeof(gprs_high)); 311ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens if (err) 312ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens return err; 313ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens for (i = 0; i < NUM_GPRS; i++) 314ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens *(__u32 *)®s->gprs[i] = gprs_high[i]; 315ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens return 0; 316ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens} 317ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens 31803ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefskyasmlinkage long sys32_sigreturn(void) 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 32003ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefsky struct pt_regs *regs = task_pt_regs(current); 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigframe32 __user *frame = (sigframe32 __user *)regs->gprs[15]; 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigset_t set; 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__copy_from_user(&set.sig, &frame->sc.oldmask, _SIGMASK_COPY_SIZE32)) 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 328391c62feb1798b6d31bd88076eae649b091ad8bfHeiko Carstens set_current_blocked(&set); 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (restore_sigregs32(regs, &frame->sregs)) 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 331ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens if (restore_sigregs_gprs_high(regs, frame->gprs_high)) 332ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens goto badframe; 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return regs->gprs[2]; 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsbadframe: 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sig(SIGSEGV, current); 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33903ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefskyasmlinkage long sys32_rt_sigreturn(void) 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 34103ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefsky struct pt_regs *regs = task_pt_regs(current); 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rt_sigframe32 __user *frame = (rt_sigframe32 __user *)regs->gprs[15]; 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigset_t set; 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 349391c62feb1798b6d31bd88076eae649b091ad8bfHeiko Carstens set_current_blocked(&set); 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (restore_sigregs32(regs, &frame->uc.uc_mcontext)) 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 352ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens if (restore_sigregs_gprs_high(regs, frame->gprs_high)) 353ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens goto badframe; 354e214125aa8c0546b24dabf6f47b28c5e20133d1dAl Viro if (compat_restore_altstack(&frame->uc.uc_stack)) 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return regs->gprs[2]; 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsbadframe: 35803ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefsky force_sig(SIGSEGV, current); 35903ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefsky return 0; 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Set up a signal frame. 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Determine which stack to use.. 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void __user * 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsget_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size) 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long sp; 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Default to using normal stack */ 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sp = (unsigned long) A(regs->gprs[15]); 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 378de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens /* Overflow on alternate signal stack gives SIGSEGV. */ 379de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens if (on_sig_stack(sp) && !on_sig_stack((sp - frame_size) & -8UL)) 380de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens return (void __user *) -1UL; 381de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* This is the X/Open sanctioned signal stack switching. */ 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ka->sa.sa_flags & SA_ONSTACK) { 38428f223782bca914ae65d08234c57c2175ecd7f5dLaurent Meyer if (! sas_ss_flags(sp)) 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sp = current->sas_ss_sp + current->sas_ss_size; 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (void __user *)((sp - frame_size) & -8ul); 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int map_signal(int sig) 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (current_thread_info()->exec_domain 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && current_thread_info()->exec_domain->signal_invmap 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && sig < 32) 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return current_thread_info()->exec_domain->signal_invmap[sig]; 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return sig; 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40154dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstensstatic int setup_frame32(int sig, struct k_sigaction *ka, 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigset_t *set, struct pt_regs * regs) 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(sigframe32)); 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_WRITE, frame, sizeof(sigframe32))) 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 408de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens if (frame == (void __user *) -1UL) 409de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens goto give_sigsegv; 410de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE32)) 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (save_sigregs32(regs, &frame->sregs)) 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 416ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens if (save_sigregs_gprs_high(regs, frame->gprs_high)) 417ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens goto give_sigsegv; 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__put_user((unsigned long) &frame->sregs, &frame->sc.sregs)) 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up to return from userspace. If provided, use a stub 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds already in userspace. */ 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ka->sa.sa_flags & SA_RESTORER) { 424d4e81b35b882d96f059afdb0f98e5b6025973b09Martin Schwidefsky regs->gprs[14] = (__u64) ka->sa.sa_restorer | PSW32_ADDR_AMODE; 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 426d4e81b35b882d96f059afdb0f98e5b6025973b09Martin Schwidefsky regs->gprs[14] = (__u64) frame->retcode | PSW32_ADDR_AMODE; 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn, 4283c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky (u16 __force __user *)(frame->retcode))) 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up backchain. */ 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__put_user(regs->gprs[15], (unsigned int __user *) frame)) 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up registers for signal handler */ 4373c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky regs->gprs[15] = (__force __u64) frame; 438fa968ee215c0ca91e4a9c3a69ac2405aae6e5d2fMartin Schwidefsky /* Force 31 bit amode and default user address space control. */ 439fa968ee215c0ca91e4a9c3a69ac2405aae6e5d2fMartin Schwidefsky regs->psw.mask = PSW_MASK_BA | 440fa968ee215c0ca91e4a9c3a69ac2405aae6e5d2fMartin Schwidefsky (psw_user_bits & PSW_MASK_ASC) | 441fa968ee215c0ca91e4a9c3a69ac2405aae6e5d2fMartin Schwidefsky (regs->psw.mask & ~PSW_MASK_ASC); 4423c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky regs->psw.addr = (__force __u64) ka->sa.sa_handler; 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[2] = map_signal(sig); 4453c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky regs->gprs[3] = (__force __u64) &frame->sc; 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We forgot to include these in the sigcontext. 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds To avoid breaking binary compatibility, they are passed as args. */ 449aa33c8cbbae2eb98489a3a363099b362146a8f4cMartin Schwidefsky if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL || 450aa33c8cbbae2eb98489a3a363099b362146a8f4cMartin Schwidefsky sig == SIGTRAP || sig == SIGFPE) { 451aa33c8cbbae2eb98489a3a363099b362146a8f4cMartin Schwidefsky /* set extra registers only for synchronous signals */ 452aa33c8cbbae2eb98489a3a363099b362146a8f4cMartin Schwidefsky regs->gprs[4] = regs->int_code & 127; 453aa33c8cbbae2eb98489a3a363099b362146a8f4cMartin Schwidefsky regs->gprs[5] = regs->int_parm_long; 454aa33c8cbbae2eb98489a3a363099b362146a8f4cMartin Schwidefsky } 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Place signal number on stack to allow backtrace from handler. */ 4573c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky if (__put_user(regs->gprs[2], (int __force __user *) &frame->signo)) 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 45954dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens return 0; 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgive_sigsegv: 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sigsegv(sig, current); 46354dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens return -EFAULT; 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 46654dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstensstatic int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info, 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigset_t *set, struct pt_regs * regs) 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rt_sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(rt_sigframe32)); 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_WRITE, frame, sizeof(rt_sigframe32))) 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 474de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens if (frame == (void __user *) -1UL) 475de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens goto give_sigsegv; 476de553438eb6c487f72d46019eb3821f6687ce011Heiko Carstens 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_siginfo_to_user32(&frame->info, info)) 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Create the ucontext. */ 481ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens err |= __put_user(UC_EXTENDED, &frame->uc.uc_flags); 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(0, &frame->uc.uc_link); 483e214125aa8c0546b24dabf6f47b28c5e20133d1dAl Viro err |= __compat_save_altstack(&frame->uc.uc_stack, regs->gprs[15]); 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= save_sigregs32(regs, &frame->uc.uc_mcontext); 485ea2a4d3a3a929ef494952bba57a0ef1a8a877881Heiko Carstens err |= save_sigregs_gprs_high(regs, frame->gprs_high); 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up to return from userspace. If provided, use a stub 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds already in userspace. */ 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ka->sa.sa_flags & SA_RESTORER) { 493207a05499bf11216ac96f76b38be728f4ee49304Martin Schwidefsky regs->gprs[14] = (__u64) ka->sa.sa_restorer | PSW32_ADDR_AMODE; 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 495207a05499bf11216ac96f76b38be728f4ee49304Martin Schwidefsky regs->gprs[14] = (__u64) frame->retcode | PSW32_ADDR_AMODE; 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn, 4973c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky (u16 __force __user *)(frame->retcode)); 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up backchain. */ 5013c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky if (__put_user(regs->gprs[15], (unsigned int __force __user *) frame)) 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up registers for signal handler */ 5053c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky regs->gprs[15] = (__force __u64) frame; 506fa968ee215c0ca91e4a9c3a69ac2405aae6e5d2fMartin Schwidefsky /* Force 31 bit amode and default user address space control. */ 507fa968ee215c0ca91e4a9c3a69ac2405aae6e5d2fMartin Schwidefsky regs->psw.mask = PSW_MASK_BA | 508fa968ee215c0ca91e4a9c3a69ac2405aae6e5d2fMartin Schwidefsky (psw_user_bits & PSW_MASK_ASC) | 509fa968ee215c0ca91e4a9c3a69ac2405aae6e5d2fMartin Schwidefsky (regs->psw.mask & ~PSW_MASK_ASC); 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->psw.addr = (__u64) ka->sa.sa_handler; 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[2] = map_signal(sig); 5133c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky regs->gprs[3] = (__force __u64) &frame->info; 5143c52e49d7c81434e3d2ccb520b3a654c2cc7d03dMartin Schwidefsky regs->gprs[4] = (__force __u64) &frame->uc; 51554dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens return 0; 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgive_sigsegv: 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sigsegv(sig, current); 51954dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens return -EFAULT; 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * OK, we're invoking a handler 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 526a610d6e672d6d3723e8da257ad4a8a288a8f2f89Al Virovoid handle_signal32(unsigned long sig, struct k_sigaction *ka, 527391c62feb1798b6d31bd88076eae649b091ad8bfHeiko Carstens siginfo_t *info, sigset_t *oldset, struct pt_regs *regs) 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 52954dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens int ret; 53054dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up the stack frame */ 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ka->sa.sa_flags & SA_SIGINFO) 53354dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens ret = setup_rt_frame32(sig, ka, info, oldset, regs); 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 53554dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens ret = setup_frame32(sig, ka, oldset, regs); 536391c62feb1798b6d31bd88076eae649b091ad8bfHeiko Carstens if (ret) 537a610d6e672d6d3723e8da257ad4a8a288a8f2f89Al Viro return; 538efee984c27b67e3ebef40410f35671997441b57cAl Viro signal_delivered(sig, info, ka, regs, 539a610d6e672d6d3723e8da257ad4a8a288a8f2f89Al Viro test_thread_flag(TIF_SINGLE_STEP)); 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 542