compat_signal.c revision 03ff9a235a0602724fc54916469b6e0939c62c9b
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/smp_lock.h> 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/signal.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h> 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/wait.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/ptrace.h> 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/unistd.h> 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/stddef.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/tty.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/personality.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/binfmts.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/ucontext.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/lowcore.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "compat_linux.h" 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "compat_ptrace.h" 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldstypedef struct 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __u8 callee_used_stack[__SIGNAL_FRAMESIZE32]; 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct sigcontext32 sc; 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _sigregs32 sregs; 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int signo; 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; 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} rt_sigframe32; 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok (VERIFY_WRITE, to, sizeof(compat_siginfo_t))) 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If you change siginfo_t structure, please be sure 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds this code is fixed accordingly. 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds It should never copy any pad contained in the structure 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds to avoid security leaks, but must copy the generic 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3 ints plus the relevant union member. 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds This routine must convert siginfo from 64bit to 32bit as well 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds at the same time. */ 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __put_user(from->si_signo, &to->si_signo); 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_errno, &to->si_errno); 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user((short)from->si_code, &to->si_code); 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (from->si_code < 0) 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (from->si_code >> 16) { 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_MESGQ >> 16: 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_int, &to->si_int); 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* fallthrough */ 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_KILL >> 16: 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_pid, &to->si_pid); 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_uid, &to->si_uid); 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_CHLD >> 16: 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_pid, &to->si_pid); 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_uid, &to->si_uid); 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_utime, &to->si_utime); 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_stime, &to->si_stime); 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_status, &to->si_status); 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_FAULT >> 16: 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user((unsigned long) from->si_addr, 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &to->si_addr); 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_POLL >> 16: 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_band, &to->si_band); 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_fd, &to->si_fd); 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_TIMER >> 16: 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_tid, &to->si_tid); 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_overrun, &to->si_overrun); 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(from->si_int, &to->si_int); 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 tmp; 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok (VERIFY_READ, from, sizeof(compat_siginfo_t))) 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __get_user(to->si_signo, &from->si_signo); 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_errno, &from->si_errno); 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_code, &from->si_code); 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (to->si_code < 0) 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __copy_from_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (to->si_code >> 16) { 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_MESGQ >> 16: 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_int, &from->si_int); 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* fallthrough */ 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_KILL >> 16: 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_pid, &from->si_pid); 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_uid, &from->si_uid); 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_CHLD >> 16: 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_pid, &from->si_pid); 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_uid, &from->si_uid); 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_utime, &from->si_utime); 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_stime, &from->si_stime); 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(to->si_status, &from->si_status); 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case __SI_FAULT >> 16: 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(tmp, &from->si_addr); 142c28144763a7dcdceb2c16a5ac9c8e0022d547d28Al Viro to->si_addr = (void __user *)(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)); 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (_NSIG_WORDS) { 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (((long)set32.sig[7]) << 32); 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (((long)set32.sig[5]) << 32); 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (((long)set32.sig[3]) << 32); 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (((long)set32.sig[1]) << 32); 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags); 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_ka.sa.sa_handler = (__sighandler_t) sa_handler; 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ret && oact) { 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (_NSIG_WORDS) { 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 4: 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set32.sig[6] = old_ka.sa.sa_mask.sig[3]; 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 3: 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set32.sig[4] = old_ka.sa.sa_mask.sig[2]; 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 2: 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set32.sig[2] = old_ka.sa.sa_mask.sig[1]; 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 1: 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set32.sig[0] = old_ka.sa.sa_mask.sig[0]; 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = put_user((unsigned long)old_ka.sa.sa_handler, &oact->sa_handler); 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret |= __copy_to_user(&oact->sa_mask, &set32, 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(compat_sigset_t)); 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsasmlinkage long 25803ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefskysys32_sigaltstack(const stack_t32 __user *uss, stack_t32 __user *uoss) 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 26003ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefsky struct pt_regs *regs = task_pt_regs(current); 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stack_t kss, koss; 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long ss_sp; 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret, err = 0; 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mm_segment_t old_fs = get_fs(); 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (uss) { 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_READ, uss, sizeof(*uss))) 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(ss_sp, &uss->ss_sp); 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(kss.ss_size, &uss->ss_size); 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(kss.ss_flags, &uss->ss_flags); 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 274c28144763a7dcdceb2c16a5ac9c8e0022d547d28Al Viro kss.ss_sp = (void __user *) ss_sp; 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_fs (KERNEL_DS); 2782b67fc46061b2171fb8fbb55d1ac717abd533569Heiko Carstens ret = do_sigaltstack((stack_t __force __user *) (uss ? &kss : NULL), 2792b67fc46061b2171fb8fbb55d1ac717abd533569Heiko Carstens (stack_t __force __user *) (uoss ? &koss : NULL), 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[15]); 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_fs (old_fs); 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ret && uoss) { 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))) 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ss_sp = (unsigned long) koss.ss_sp; 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(ss_sp, &uoss->ss_sp); 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(koss.ss_size, &uoss->ss_size); 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(koss.ss_flags, &uoss->ss_flags); 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int save_sigregs32(struct pt_regs *regs, _sigregs32 __user *sregs) 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _s390_regs_common32 regs32; 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err, i; 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 301c1821c2e9711adc3cd298a16b7237c92a2cee78dGerald Schaefer regs32.psw.mask = PSW32_MASK_MERGE(psw32_user_bits, 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (__u32)(regs->psw.mask >> 32)); 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs32.psw.addr = PSW32_ADDR_AMODE31 | (__u32) regs->psw.addr; 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_GPRS; i++) 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs32.gprs[i] = (__u32) regs->gprs[i]; 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds save_access_regs(current->thread.acrs); 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(regs32.acrs, current->thread.acrs, sizeof(regs32.acrs)); 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __copy_to_user(&sregs->regs, ®s32, sizeof(regs32)); 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds save_fp_regs(¤t->thread.fp_regs); 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* s390_fp_regs and _s390_fp_regs32 are the same ! */ 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return __copy_to_user(&sregs->fpregs, ¤t->thread.fp_regs, 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(_s390_fp_regs32)); 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs) 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _s390_regs_common32 regs32; 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err, i; 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Alwys make any pending restarted system call return -EINTR */ 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds current_thread_info()->restart_block.fn = do_no_restart_syscall; 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __copy_from_user(®s32, &sregs->regs, sizeof(regs32)); 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->psw.mask = PSW_MASK_MERGE(regs->psw.mask, 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (__u64)regs32.psw.mask << 32); 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->psw.addr = (__u64)(regs32.psw.addr & PSW32_ADDR_INSN); 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_GPRS; i++) 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[i] = (__u64) regs32.gprs[i]; 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(current->thread.acrs, regs32.acrs, sizeof(current->thread.acrs)); 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds restore_access_regs(current->thread.acrs); 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __copy_from_user(¤t->thread.fp_regs, &sregs->fpregs, 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(_s390_fp_regs32)); 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds current->thread.fp_regs.fpc &= FPC_VALID_MASK; 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds restore_fp_regs(¤t->thread.fp_regs); 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->trap = -1; /* disable syscall checks */ 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34703ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefskyasmlinkage long sys32_sigreturn(void) 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 34903ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefsky struct pt_regs *regs = task_pt_regs(current); 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigframe32 __user *frame = (sigframe32 __user *)regs->gprs[15]; 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigset_t set; 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__copy_from_user(&set.sig, &frame->sc.oldmask, _SIGMASK_COPY_SIZE32)) 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigdelsetmask(&set, ~_BLOCKABLE); 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(¤t->sighand->siglock); 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds current->blocked = set; 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds recalc_sigpending(); 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(¤t->sighand->siglock); 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (restore_sigregs32(regs, &frame->sregs)) 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return regs->gprs[2]; 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsbadframe: 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sig(SIGSEGV, current); 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37403ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefskyasmlinkage long sys32_rt_sigreturn(void) 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 37603ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefsky struct pt_regs *regs = task_pt_regs(current); 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rt_sigframe32 __user *frame = (rt_sigframe32 __user *)regs->gprs[15]; 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigset_t set; 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stack_t st; 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __u32 ss_sp; 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mm_segment_t old_fs = get_fs(); 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigdelsetmask(&set, ~_BLOCKABLE); 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(¤t->sighand->siglock); 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds current->blocked = set; 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds recalc_sigpending(); 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(¤t->sighand->siglock); 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (restore_sigregs32(regs, &frame->uc.uc_mcontext)) 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = __get_user(ss_sp, &frame->uc.uc_stack.ss_sp); 399c28144763a7dcdceb2c16a5ac9c8e0022d547d28Al Viro st.ss_sp = compat_ptr(ss_sp); 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(st.ss_size, &frame->uc.uc_stack.ss_size); 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __get_user(st.ss_flags, &frame->uc.uc_stack.ss_flags); 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_fs (KERNEL_DS); 4062b67fc46061b2171fb8fbb55d1ac717abd533569Heiko Carstens do_sigaltstack((stack_t __force __user *)&st, NULL, regs->gprs[15]); 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_fs (old_fs); 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return regs->gprs[2]; 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsbadframe: 41203ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefsky force_sig(SIGSEGV, current); 41303ff9a235a0602724fc54916469b6e0939c62c9bMartin Schwidefsky return 0; 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Set up a signal frame. 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Determine which stack to use.. 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void __user * 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsget_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size) 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long sp; 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Default to using normal stack */ 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sp = (unsigned long) A(regs->gprs[15]); 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* This is the X/Open sanctioned signal stack switching. */ 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ka->sa.sa_flags & SA_ONSTACK) { 43428f223782bca914ae65d08234c57c2175ecd7f5dLaurent Meyer if (! sas_ss_flags(sp)) 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sp = current->sas_ss_sp + current->sas_ss_size; 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* This is the legacy signal stack switching. */ 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (!user_mode(regs) && 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds !(ka->sa.sa_flags & SA_RESTORER) && 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ka->sa.sa_restorer) { 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sp = (unsigned long) ka->sa.sa_restorer; 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (void __user *)((sp - frame_size) & -8ul); 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int map_signal(int sig) 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (current_thread_info()->exec_domain 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && current_thread_info()->exec_domain->signal_invmap 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && sig < 32) 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return current_thread_info()->exec_domain->signal_invmap[sig]; 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return sig; 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 45854dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstensstatic int setup_frame32(int sig, struct k_sigaction *ka, 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigset_t *set, struct pt_regs * regs) 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(sigframe32)); 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_WRITE, frame, sizeof(sigframe32))) 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE32)) 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (save_sigregs32(regs, &frame->sregs)) 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__put_user((unsigned long) &frame->sregs, &frame->sc.sregs)) 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up to return from userspace. If provided, use a stub 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds already in userspace. */ 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ka->sa.sa_flags & SA_RESTORER) { 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[14] = (__u64) ka->sa.sa_restorer; 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[14] = (__u64) frame->retcode; 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn, 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (u16 __user *)(frame->retcode))) 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up backchain. */ 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__put_user(regs->gprs[15], (unsigned int __user *) frame)) 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up registers for signal handler */ 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[15] = (__u64) frame; 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->psw.addr = (__u64) ka->sa.sa_handler; 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[2] = map_signal(sig); 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[3] = (__u64) &frame->sc; 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We forgot to include these in the sigcontext. 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds To avoid breaking binary compatibility, they are passed as args. */ 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[4] = current->thread.trap_no; 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[5] = current->thread.prot_addr; 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Place signal number on stack to allow backtrace from handler. */ 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__put_user(regs->gprs[2], (int __user *) &frame->signo)) 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 50354dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens return 0; 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgive_sigsegv: 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sigsegv(sig, current); 50754dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens return -EFAULT; 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 51054dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstensstatic int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info, 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigset_t *set, struct pt_regs * regs) 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rt_sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(rt_sigframe32)); 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_WRITE, frame, sizeof(rt_sigframe32))) 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_siginfo_to_user32(&frame->info, info)) 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Create the ucontext. */ 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(0, &frame->uc.uc_flags); 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(0, &frame->uc.uc_link); 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp); 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(sas_ss_flags(regs->gprs[15]), 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &frame->uc.uc_stack.ss_flags); 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= save_sigregs32(regs, &frame->uc.uc_mcontext); 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up to return from userspace. If provided, use a stub 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds already in userspace. */ 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ka->sa.sa_flags & SA_RESTORER) { 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[14] = (__u64) ka->sa.sa_restorer; 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[14] = (__u64) frame->retcode; 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn, 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (u16 __user *)(frame->retcode)); 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up backchain. */ 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__put_user(regs->gprs[15], (unsigned int __user *) frame)) 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up registers for signal handler */ 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[15] = (__u64) frame; 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->psw.addr = (__u64) ka->sa.sa_handler; 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[2] = map_signal(sig); 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[3] = (__u64) &frame->info; 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->gprs[4] = (__u64) &frame->uc; 55454dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens return 0; 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgive_sigsegv: 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sigsegv(sig, current); 55854dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens return -EFAULT; 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * OK, we're invoking a handler 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 56554dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstensint 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshandle_signal32(unsigned long sig, struct k_sigaction *ka, 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds siginfo_t *info, sigset_t *oldset, struct pt_regs * regs) 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 56954dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens int ret; 57054dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up the stack frame */ 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ka->sa.sa_flags & SA_SIGINFO) 57354dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens ret = setup_rt_frame32(sig, ka, info, oldset, regs); 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 57554dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens ret = setup_frame32(sig, ka, oldset, regs); 57654dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens 57754dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens if (ret == 0) { 57854dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens spin_lock_irq(¤t->sighand->siglock); 57954dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask); 58054dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens if (!(ka->sa.sa_flags & SA_NODEFER)) 58154dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens sigaddset(¤t->blocked,sig); 58254dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens recalc_sigpending(); 58354dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens spin_unlock_irq(¤t->sighand->siglock); 58454dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens } 58554dfe5dd9abc547f63060d132dad2c024a47de1eHeiko Carstens return ret; 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 588