11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (C) 2003 Broadcom Corporation 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 51da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 61da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 2 71da177e4SLinus Torvalds * of the License, or (at your option) any later version. 81da177e4SLinus Torvalds * 91da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, 101da177e4SLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 111da177e4SLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 121da177e4SLinus Torvalds * GNU General Public License for more details. 131da177e4SLinus Torvalds * 141da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 151da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 161da177e4SLinus Torvalds * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 171da177e4SLinus Torvalds */ 1802416dcfSRalf Baechle #include <linux/cache.h> 1902416dcfSRalf Baechle #include <linux/sched.h> 201da177e4SLinus Torvalds #include <linux/mm.h> 211da177e4SLinus Torvalds #include <linux/smp.h> 221da177e4SLinus Torvalds #include <linux/kernel.h> 231da177e4SLinus Torvalds #include <linux/signal.h> 241da177e4SLinus Torvalds #include <linux/errno.h> 251da177e4SLinus Torvalds #include <linux/wait.h> 261da177e4SLinus Torvalds #include <linux/ptrace.h> 271da177e4SLinus Torvalds #include <linux/unistd.h> 281da177e4SLinus Torvalds #include <linux/compat.h> 291da177e4SLinus Torvalds #include <linux/bitops.h> 301da177e4SLinus Torvalds 31151fd6acSRalf Baechle #include <asm/abi.h> 321da177e4SLinus Torvalds #include <asm/asm.h> 331da177e4SLinus Torvalds #include <asm/cacheflush.h> 34431dc804SRalf Baechle #include <asm/compat-signal.h> 351da177e4SLinus Torvalds #include <asm/sim.h> 361da177e4SLinus Torvalds #include <asm/uaccess.h> 371da177e4SLinus Torvalds #include <asm/ucontext.h> 381da177e4SLinus Torvalds #include <asm/fpu.h> 391da177e4SLinus Torvalds #include <asm/cpu-features.h> 4002416dcfSRalf Baechle #include <asm/war.h> 41d814c28cSDavid Daney #include <asm/vdso.h> 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds #include "signal-common.h" 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds /* 461da177e4SLinus Torvalds * Including <asm/unistd.h> would give use the 64-bit syscall numbers ... 471da177e4SLinus Torvalds */ 481da177e4SLinus Torvalds #define __NR_N32_restart_syscall 6214 491da177e4SLinus Torvalds 50205d84aaSRalf Baechle extern int setup_sigcontext(struct pt_regs *, struct sigcontext __user *); 51205d84aaSRalf Baechle extern int restore_sigcontext(struct pt_regs *, struct sigcontext __user *); 52205d84aaSRalf Baechle 531da177e4SLinus Torvalds struct ucontextn32 { 541da177e4SLinus Torvalds u32 uc_flags; 551da177e4SLinus Torvalds s32 uc_link; 56ea536ad4SAl Viro compat_stack_t uc_stack; 571da177e4SLinus Torvalds struct sigcontext uc_mcontext; 58431dc804SRalf Baechle compat_sigset_t uc_sigmask; /* mask last for extensibility */ 591da177e4SLinus Torvalds }; 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds struct rt_sigframe_n32 { 621da177e4SLinus Torvalds u32 rs_ass[4]; /* argument save space for o32 */ 63d814c28cSDavid Daney u32 rs_pad[2]; /* Was: signal trampoline */ 64a76f3a41SPavel Kiryukhin struct compat_siginfo rs_info; 651da177e4SLinus Torvalds struct ucontextn32 rs_uc; 661da177e4SLinus Torvalds }; 671da177e4SLinus Torvalds 683f2e05e9SDavid Howells extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat); 693f2e05e9SDavid Howells 70f90080a0SFranck Bui-Huu asmlinkage int sysn32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs) 7182ad93f4SRalf Baechle { 72b1bcb362SAtsushi Nemoto compat_sigset_t __user *unewset; 73b1bcb362SAtsushi Nemoto compat_sigset_t uset; 7482ad93f4SRalf Baechle size_t sigsetsize; 7582ad93f4SRalf Baechle sigset_t newset; 7682ad93f4SRalf Baechle 7782ad93f4SRalf Baechle /* XXX Don't preclude handling different sized sigset_t's. */ 7882ad93f4SRalf Baechle sigsetsize = regs.regs[5]; 7982ad93f4SRalf Baechle if (sigsetsize != sizeof(sigset_t)) 8082ad93f4SRalf Baechle return -EINVAL; 8182ad93f4SRalf Baechle 8282ad93f4SRalf Baechle unewset = (compat_sigset_t __user *) regs.regs[4]; 8382ad93f4SRalf Baechle if (copy_from_user(&uset, unewset, sizeof(uset))) 8482ad93f4SRalf Baechle return -EFAULT; 8582ad93f4SRalf Baechle sigset_from_compat(&newset, &uset); 8668f3f16dSAl Viro return sigsuspend(&newset); 8782ad93f4SRalf Baechle } 8882ad93f4SRalf Baechle 89f90080a0SFranck Bui-Huu asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs) 901da177e4SLinus Torvalds { 919bbf28a3SAtsushi Nemoto struct rt_sigframe_n32 __user *frame; 921da177e4SLinus Torvalds sigset_t set; 93c6a2f467SAtsushi Nemoto int sig; 941da177e4SLinus Torvalds 959bbf28a3SAtsushi Nemoto frame = (struct rt_sigframe_n32 __user *) regs.regs[29]; 961da177e4SLinus Torvalds if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) 971da177e4SLinus Torvalds goto badframe; 98431dc804SRalf Baechle if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask)) 991da177e4SLinus Torvalds goto badframe; 1001da177e4SLinus Torvalds 1018598f3cdSMatt Fleming set_current_blocked(&set); 1021da177e4SLinus Torvalds 103c6a2f467SAtsushi Nemoto sig = restore_sigcontext(®s, &frame->rs_uc.uc_mcontext); 104c6a2f467SAtsushi Nemoto if (sig < 0) 1051da177e4SLinus Torvalds goto badframe; 106c6a2f467SAtsushi Nemoto else if (sig) 107c6a2f467SAtsushi Nemoto force_sig(sig, current); 1081da177e4SLinus Torvalds 109ea536ad4SAl Viro if (compat_restore_altstack(&frame->rs_uc.uc_stack)) 1101da177e4SLinus Torvalds goto badframe; 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds /* 1131da177e4SLinus Torvalds * Don't let your children do this ... 1141da177e4SLinus Torvalds */ 1151da177e4SLinus Torvalds __asm__ __volatile__( 1161da177e4SLinus Torvalds "move\t$29, %0\n\t" 1171da177e4SLinus Torvalds "j\tsyscall_exit" 1181da177e4SLinus Torvalds :/* no outputs */ 1191da177e4SLinus Torvalds :"r" (®s)); 1201da177e4SLinus Torvalds /* Unreached */ 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds badframe: 1231da177e4SLinus Torvalds force_sig(SIGSEGV, current); 1241da177e4SLinus Torvalds } 1251da177e4SLinus Torvalds 126d814c28cSDavid Daney static int setup_rt_frame_n32(void *sig_return, struct k_sigaction *ka, 1271da177e4SLinus Torvalds struct pt_regs *regs, int signr, sigset_t *set, siginfo_t *info) 1281da177e4SLinus Torvalds { 1299bbf28a3SAtsushi Nemoto struct rt_sigframe_n32 __user *frame; 1301da177e4SLinus Torvalds int err = 0; 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds frame = get_sigframe(ka, regs, sizeof(*frame)); 1331da177e4SLinus Torvalds if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame))) 1341da177e4SLinus Torvalds goto give_sigsegv; 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds /* Create siginfo. */ 137a76f3a41SPavel Kiryukhin err |= copy_siginfo_to_user32(&frame->rs_info, info); 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds /* Create the ucontext. */ 1401da177e4SLinus Torvalds err |= __put_user(0, &frame->rs_uc.uc_flags); 1411da177e4SLinus Torvalds err |= __put_user(0, &frame->rs_uc.uc_link); 142ea536ad4SAl Viro err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]); 1431da177e4SLinus Torvalds err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext); 144431dc804SRalf Baechle err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set); 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds if (err) 1471da177e4SLinus Torvalds goto give_sigsegv; 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds /* 1501da177e4SLinus Torvalds * Arguments to signal handler: 1511da177e4SLinus Torvalds * 1521da177e4SLinus Torvalds * a0 = signal number 1531da177e4SLinus Torvalds * a1 = 0 (should be cause) 1541da177e4SLinus Torvalds * a2 = pointer to ucontext 1551da177e4SLinus Torvalds * 1561da177e4SLinus Torvalds * $25 and c0_epc point to the signal handler, $29 points to 1571da177e4SLinus Torvalds * the struct rt_sigframe. 1581da177e4SLinus Torvalds */ 1591da177e4SLinus Torvalds regs->regs[ 4] = signr; 1601da177e4SLinus Torvalds regs->regs[ 5] = (unsigned long) &frame->rs_info; 1611da177e4SLinus Torvalds regs->regs[ 6] = (unsigned long) &frame->rs_uc; 1621da177e4SLinus Torvalds regs->regs[29] = (unsigned long) frame; 163d814c28cSDavid Daney regs->regs[31] = (unsigned long) sig_return; 1641da177e4SLinus Torvalds regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler; 1651da177e4SLinus Torvalds 166722bb63dSFranck Bui-Huu DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n", 1671da177e4SLinus Torvalds current->comm, current->pid, 1681da177e4SLinus Torvalds frame, regs->cp0_epc, regs->regs[31]); 169722bb63dSFranck Bui-Huu 1707b3e2fc8SRalf Baechle return 0; 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds give_sigsegv: 1731da177e4SLinus Torvalds force_sigsegv(signr, current); 1747b3e2fc8SRalf Baechle return -EFAULT; 1751da177e4SLinus Torvalds } 176151fd6acSRalf Baechle 177151fd6acSRalf Baechle struct mips_abi mips_abi_n32 = { 178151fd6acSRalf Baechle .setup_rt_frame = setup_rt_frame_n32, 179d814c28cSDavid Daney .rt_signal_return_offset = 180d814c28cSDavid Daney offsetof(struct mips_vdso, n32_rt_signal_trampoline), 181151fd6acSRalf Baechle .restart = __NR_N32_restart_syscall 182151fd6acSRalf Baechle }; 183