signal_n32.c revision 9c6031cc93626a194a9ef32d62b078ef1b396c45
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 2003 Broadcom Corporation 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * modify it under the terms of the GNU General Public License 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * as published by the Free Software Foundation; either version 2 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * of the License, or (at your option) any later version. 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is distributed in the hope that it will be useful, 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * GNU General Public License for more details. 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * You should have received a copy of the GNU General Public License 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * along with this program; if not, write to the Free Software 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1802416dcf5a94af34bcd28b4baf25bbbf399d8136Ralf Baechle#include <linux/cache.h> 1902416dcf5a94af34bcd28b4baf25bbbf399d8136Ralf Baechle#include <linux/sched.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sched.h> 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/smp.h> 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/smp_lock.h> 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/signal.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/wait.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/ptrace.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/unistd.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/compat.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/bitops.h> 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/asm.h> 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/cacheflush.h> 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/sim.h> 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/ucontext.h> 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/system.h> 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/fpu.h> 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/cpu-features.h> 4102416dcf5a94af34bcd28b4baf25bbbf399d8136Ralf Baechle#include <asm/war.h> 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "signal-common.h" 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Including <asm/unistd.h> would give use the 64-bit syscall numbers ... 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define __NR_N32_rt_sigreturn 6211 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define __NR_N32_restart_syscall 6214 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 515665a0ac59a656b94cbf3c4642b32024a6c1cf75Atsushi Nemoto#define DEBUG_SIG 0 525665a0ac59a656b94cbf3c4642b32024a6c1cf75Atsushi Nemoto 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* IRIX compatible stack_t */ 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldstypedef struct sigaltstack32 { 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds s32 ss_sp; 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds compat_size_t ss_size; 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ss_flags; 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} stack32_t; 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct ucontextn32 { 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 uc_flags; 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds s32 uc_link; 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stack32_t uc_stack; 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct sigcontext uc_mcontext; 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigset_t uc_sigmask; /* mask last for extensibility */ 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct rt_sigframe_n32 { 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 rs_ass[4]; /* argument save space for o32 */ 7202416dcf5a94af34bcd28b4baf25bbbf399d8136Ralf Baechle#if ICACHE_REFILLS_WORKAROUND_WAR 7302416dcf5a94af34bcd28b4baf25bbbf399d8136Ralf Baechle u32 rs_pad[2]; 7402416dcf5a94af34bcd28b4baf25bbbf399d8136Ralf Baechle#else 7502416dcf5a94af34bcd28b4baf25bbbf399d8136Ralf Baechle u32 rs_code[2]; /* signal trampoline */ 7602416dcf5a94af34bcd28b4baf25bbbf399d8136Ralf Baechle#endif 7702416dcf5a94af34bcd28b4baf25bbbf399d8136Ralf Baechle struct siginfo rs_info; 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ucontextn32 rs_uc; 7902416dcf5a94af34bcd28b4baf25bbbf399d8136Ralf Baechle#if ICACHE_REFILLS_WORKAROUND_WAR 8002416dcf5a94af34bcd28b4baf25bbbf399d8136Ralf Baechle u32 rs_code[8] ____cacheline_aligned; /* signal trampoline */ 8102416dcf5a94af34bcd28b4baf25bbbf399d8136Ralf Baechle#endif 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8482ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechleextern void sigset_from_compat (sigset_t *set, compat_sigset_t *compat); 8582ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle 8682ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechlesave_static_function(sysn32_rt_sigsuspend); 8782ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle__attribute_used__ noinline static int 8882ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle_sysn32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs) 8982ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle{ 9082ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle compat_sigset_t __user *unewset, uset; 9182ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle size_t sigsetsize; 9282ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle sigset_t newset; 9382ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle 9482ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle /* XXX Don't preclude handling different sized sigset_t's. */ 9582ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle sigsetsize = regs.regs[5]; 9682ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle if (sigsetsize != sizeof(sigset_t)) 9782ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle return -EINVAL; 9882ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle 9982ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle unewset = (compat_sigset_t __user *) regs.regs[4]; 10082ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle if (copy_from_user(&uset, unewset, sizeof(uset))) 10182ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle return -EFAULT; 10282ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle sigset_from_compat (&newset, &uset); 10382ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle sigdelsetmask(&newset, ~_BLOCKABLE); 10482ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle 10582ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle spin_lock_irq(¤t->sighand->siglock); 10682ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle current->saved_sigmask = current->blocked; 10782ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle current->blocked = newset; 10882ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle recalc_sigpending(); 10982ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle spin_unlock_irq(¤t->sighand->siglock); 11082ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle 11182ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle current->state = TASK_INTERRUPTIBLE; 11282ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle schedule(); 11382ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle set_thread_flag(TIF_RESTORE_SIGMASK); 11482ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle return -ERESTARTNOHAND; 11582ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle} 11682ad93f4a002294820e9a5e6f84beef2222a54b7Ralf Baechle 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssave_static_function(sysn32_rt_sigreturn); 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds__attribute_used__ noinline static void 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds_sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs) 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1219bbf28a36cae08817ac3a3f98fde329b02c89f4aAtsushi Nemoto struct rt_sigframe_n32 __user *frame; 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigset_t set; 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stack_t st; 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds s32 sp; 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1269bbf28a36cae08817ac3a3f98fde329b02c89f4aAtsushi Nemoto frame = (struct rt_sigframe_n32 __user *) regs.regs[29]; 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__copy_from_user(&set, &frame->rs_uc.uc_sigmask, sizeof(set))) 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sigdelsetmask(&set, ~_BLOCKABLE); 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(¤t->sighand->siglock); 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds current->blocked = set; 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds recalc_sigpending(); 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(¤t->sighand->siglock); 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (restore_sigcontext(®s, &frame->rs_uc.uc_mcontext)) 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The ucontext contains a stack32_t, so we must convert! */ 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp)) 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 1449c6031cc93626a194a9ef32d62b078ef1b396c45Atsushi Nemoto st.ss_sp = (void __user *)(long) sp; 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size)) 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags)) 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto badframe; 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* It is more difficult to avoid calling this function than to 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds call it and ignore errors. */ 1529bbf28a36cae08817ac3a3f98fde329b02c89f4aAtsushi Nemoto do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]); 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Don't let your children do this ... 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __asm__ __volatile__( 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "move\t$29, %0\n\t" 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "j\tsyscall_exit" 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds :/* no outputs */ 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds :"r" (®s)); 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Unreached */ 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsbadframe: 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sig(SIGSEGV, current); 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 168129bc8f78b468df6824dd1584829f10aa3a69c27Ralf Baechleint setup_rt_frame_n32(struct k_sigaction * ka, 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pt_regs *regs, int signr, sigset_t *set, siginfo_t *info) 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1719bbf28a36cae08817ac3a3f98fde329b02c89f4aAtsushi Nemoto struct rt_sigframe_n32 __user *frame; 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds s32 sp; 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds frame = get_sigframe(ka, regs, sizeof(*frame)); 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame))) 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17902416dcf5a94af34bcd28b4baf25bbbf399d8136Ralf Baechle install_sigtramp(frame->rs_code, __NR_N32_rt_sigreturn); 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Create siginfo. */ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= copy_siginfo_to_user(&frame->rs_info, info); 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Create the ucontext. */ 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(0, &frame->rs_uc.uc_flags); 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(0, &frame->rs_uc.uc_link); 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sp = (int) (long) current->sas_ss_sp; 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(sp, 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &frame->rs_uc.uc_stack.ss_sp); 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(sas_ss_flags(regs->regs[29]), 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &frame->rs_uc.uc_stack.ss_flags); 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __put_user(current->sas_ss_size, 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &frame->rs_uc.uc_stack.ss_size); 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext); 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set)); 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto give_sigsegv; 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Arguments to signal handler: 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a0 = signal number 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a1 = 0 (should be cause) 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a2 = pointer to ucontext 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * $25 and c0_epc point to the signal handler, $29 points to 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the struct rt_sigframe. 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->regs[ 4] = signr; 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->regs[ 5] = (unsigned long) &frame->rs_info; 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->regs[ 6] = (unsigned long) &frame->rs_uc; 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->regs[29] = (unsigned long) frame; 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->regs[31] = (unsigned long) frame->rs_code; 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler; 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if DEBUG_SIG 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%p\n", 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds current->comm, current->pid, 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds frame, regs->cp0_epc, regs->regs[31]); 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 2227b3e2fc847c8325a7b35185fa1fc2f1729ed9c5bRalf Baechle return 0; 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgive_sigsegv: 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds force_sigsegv(signr, current); 2267b3e2fc847c8325a7b35185fa1fc2f1729ed9c5bRalf Baechle return -EFAULT; 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 228