2005-04-17 06:20:36 +08:00
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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2006-02-18 23:21:30 +08:00
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* Copyright (C) 1994 - 2000, 2006 Ralf Baechle
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2005-04-17 06:20:36 +08:00
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* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
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*/
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2005-06-15 21:00:12 +08:00
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#include <linux/cache.h>
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2007-02-13 08:05:11 +08:00
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#include <linux/compat.h>
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2005-04-17 06:20:36 +08:00
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/kernel.h>
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#include <linux/signal.h>
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#include <linux/syscalls.h>
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#include <linux/errno.h>
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#include <linux/wait.h>
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#include <linux/ptrace.h>
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#include <linux/compat.h>
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#include <linux/suspend.h>
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#include <linux/compiler.h>
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2007-04-16 22:19:44 +08:00
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#include <linux/uaccess.h>
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2005-04-17 06:20:36 +08:00
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2005-05-31 19:49:19 +08:00
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#include <asm/abi.h>
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2005-04-17 06:20:36 +08:00
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#include <asm/asm.h>
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2007-02-13 08:05:11 +08:00
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#include <asm/compat-signal.h>
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2005-04-17 06:20:36 +08:00
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#include <linux/bitops.h>
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#include <asm/cacheflush.h>
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#include <asm/sim.h>
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#include <asm/ucontext.h>
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#include <asm/system.h>
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#include <asm/fpu.h>
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2005-06-15 21:00:12 +08:00
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#include <asm/war.h>
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2005-04-17 06:20:36 +08:00
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2007-02-05 22:24:22 +08:00
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#include "signal-common.h"
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2005-04-17 06:20:36 +08:00
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#define SI_PAD_SIZE32 ((SI_MAX_SIZE/sizeof(int)) - 3)
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typedef struct compat_siginfo {
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int si_signo;
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int si_code;
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int si_errno;
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union {
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int _pad[SI_PAD_SIZE32];
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/* kill() */
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struct {
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compat_pid_t _pid; /* sender's pid */
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compat_uid_t _uid; /* sender's uid */
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} _kill;
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/* SIGCHLD */
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struct {
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compat_pid_t _pid; /* which child */
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compat_uid_t _uid; /* sender's uid */
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int _status; /* exit code */
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compat_clock_t _utime;
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compat_clock_t _stime;
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} _sigchld;
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/* IRIX SIGCHLD */
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struct {
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compat_pid_t _pid; /* which child */
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compat_clock_t _utime;
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int _status; /* exit code */
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compat_clock_t _stime;
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} _irix_sigchld;
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/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
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struct {
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s32 _addr; /* faulting insn/memory ref. */
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} _sigfault;
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/* SIGPOLL, SIGXFSZ (To do ...) */
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struct {
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int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
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int _fd;
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} _sigpoll;
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/* POSIX.1b timers */
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struct {
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2005-02-17 05:24:16 +08:00
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timer_t _tid; /* timer id */
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int _overrun; /* overrun count */
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2005-03-19 01:36:42 +08:00
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compat_sigval_t _sigval;/* same as below */
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2005-02-17 05:24:16 +08:00
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int _sys_private; /* not to be passed to user */
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2005-04-17 06:20:36 +08:00
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} _timer;
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/* POSIX.1b signals */
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struct {
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compat_pid_t _pid; /* sender's pid */
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compat_uid_t _uid; /* sender's uid */
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compat_sigval_t _sigval;
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} _rt;
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} _sifields;
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} compat_siginfo_t;
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/*
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* Including <asm/unistd.h> would give use the 64-bit syscall numbers ...
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*/
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#define __NR_O32_sigreturn 4119
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#define __NR_O32_rt_sigreturn 4193
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2007-02-15 19:40:37 +08:00
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#define __NR_O32_restart_syscall 4253
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2005-04-17 06:20:36 +08:00
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/* 32-bit compatibility types */
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typedef unsigned int __sighandler32_t;
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typedef void (*vfptr_t)(void);
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struct sigaction32 {
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unsigned int sa_flags;
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__sighandler32_t sa_handler;
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compat_sigset_t sa_mask;
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};
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/* IRIX compatible stack_t */
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typedef struct sigaltstack32 {
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s32 ss_sp;
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compat_size_t ss_size;
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int ss_flags;
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} stack32_t;
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struct ucontext32 {
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u32 uc_flags;
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s32 uc_link;
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stack32_t uc_stack;
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struct sigcontext32 uc_mcontext;
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2007-02-12 02:22:36 +08:00
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compat_sigset_t uc_sigmask; /* mask last for extensibility */
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2005-04-17 06:20:36 +08:00
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};
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2007-02-13 08:50:57 +08:00
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/*
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* Horribly complicated - with the bloody RM9000 workarounds enabled
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* the signal trampolines is moving to the end of the structure so we can
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* increase the alignment without breaking software compatibility.
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*/
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2007-02-05 22:24:21 +08:00
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#if ICACHE_REFILLS_WORKAROUND_WAR == 0
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2007-02-13 08:50:57 +08:00
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struct sigframe32 {
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u32 sf_ass[4]; /* argument save space for o32 */
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u32 sf_code[2]; /* signal trampoline */
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struct sigcontext32 sf_sc;
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2007-02-14 13:41:01 +08:00
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compat_sigset_t sf_mask;
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2007-02-13 08:50:57 +08:00
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};
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2007-02-05 22:24:21 +08:00
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struct rt_sigframe32 {
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u32 rs_ass[4]; /* argument save space for o32 */
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u32 rs_code[2]; /* signal trampoline */
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compat_siginfo_t rs_info;
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struct ucontext32 rs_uc;
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};
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#else /* ICACHE_REFILLS_WORKAROUND_WAR */
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2007-02-13 08:50:57 +08:00
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struct sigframe32 {
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u32 sf_ass[4]; /* argument save space for o32 */
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u32 sf_pad[2];
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struct sigcontext32 sf_sc; /* hw context */
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2007-02-14 13:41:01 +08:00
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compat_sigset_t sf_mask;
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2007-02-13 08:50:57 +08:00
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u32 sf_code[8] ____cacheline_aligned; /* signal trampoline */
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};
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2007-02-05 22:24:21 +08:00
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struct rt_sigframe32 {
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u32 rs_ass[4]; /* argument save space for o32 */
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u32 rs_pad[2];
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compat_siginfo_t rs_info;
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struct ucontext32 rs_uc;
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u32 rs_code[8] __attribute__((aligned(32))); /* signal trampoline */
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};
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#endif /* !ICACHE_REFILLS_WORKAROUND_WAR */
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2007-02-05 22:24:25 +08:00
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/*
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* sigcontext handlers
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*/
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2007-04-16 22:19:44 +08:00
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static int protected_save_fp_context32(struct sigcontext32 __user *sc)
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{
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int err;
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while (1) {
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lock_fpu_owner();
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own_fpu_inatomic(1);
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err = save_fp_context32(sc); /* this might fail */
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unlock_fpu_owner();
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if (likely(!err))
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break;
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/* touch the sigcontext and try again */
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err = __put_user(0, &sc->sc_fpregs[0]) |
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__put_user(0, &sc->sc_fpregs[31]) |
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__put_user(0, &sc->sc_fpc_csr);
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if (err)
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break; /* really bad sigcontext */
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}
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return err;
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}
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static int protected_restore_fp_context32(struct sigcontext32 __user *sc)
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{
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int err, tmp;
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while (1) {
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lock_fpu_owner();
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own_fpu_inatomic(0);
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err = restore_fp_context32(sc); /* this might fail */
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unlock_fpu_owner();
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if (likely(!err))
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break;
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/* touch the sigcontext and try again */
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err = __get_user(tmp, &sc->sc_fpregs[0]) |
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__get_user(tmp, &sc->sc_fpregs[31]) |
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__get_user(tmp, &sc->sc_fpc_csr);
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if (err)
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break; /* really bad sigcontext */
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}
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return err;
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}
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2007-02-05 22:24:25 +08:00
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static int setup_sigcontext32(struct pt_regs *regs,
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struct sigcontext32 __user *sc)
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{
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int err = 0;
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int i;
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2007-03-10 00:07:45 +08:00
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u32 used_math;
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2007-02-05 22:24:25 +08:00
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err |= __put_user(regs->cp0_epc, &sc->sc_pc);
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err |= __put_user(0, &sc->sc_regs[0]);
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for (i = 1; i < 32; i++)
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err |= __put_user(regs->regs[i], &sc->sc_regs[i]);
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err |= __put_user(regs->hi, &sc->sc_mdhi);
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err |= __put_user(regs->lo, &sc->sc_mdlo);
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if (cpu_has_dsp) {
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err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
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err |= __put_user(mfhi1(), &sc->sc_hi1);
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err |= __put_user(mflo1(), &sc->sc_lo1);
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err |= __put_user(mfhi2(), &sc->sc_hi2);
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err |= __put_user(mflo2(), &sc->sc_lo2);
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err |= __put_user(mfhi3(), &sc->sc_hi3);
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err |= __put_user(mflo3(), &sc->sc_lo3);
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}
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2007-03-10 00:07:45 +08:00
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used_math = !!used_math();
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err |= __put_user(used_math, &sc->sc_used_math);
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2007-02-05 22:24:25 +08:00
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2007-03-10 00:07:45 +08:00
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if (used_math) {
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2007-02-05 22:24:25 +08:00
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/*
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* Save FPU state to signal context. Signal handler
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* will "inherit" current FPU state.
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*/
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2007-04-16 22:19:44 +08:00
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err |= protected_save_fp_context32(sc);
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2007-02-05 22:24:25 +08:00
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}
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return err;
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}
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2007-03-10 00:03:48 +08:00
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static int
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check_and_restore_fp_context32(struct sigcontext32 __user *sc)
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{
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int err, sig;
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err = sig = fpcsr_pending(&sc->sc_fpc_csr);
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if (err > 0)
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err = 0;
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2007-04-16 22:19:44 +08:00
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err |= protected_restore_fp_context32(sc);
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2007-03-10 00:03:48 +08:00
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return err ?: sig;
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}
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2007-02-05 22:24:25 +08:00
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static int restore_sigcontext32(struct pt_regs *regs,
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struct sigcontext32 __user *sc)
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{
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u32 used_math;
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int err = 0;
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s32 treg;
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int i;
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/* Always make any pending restarted system calls return -EINTR */
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current_thread_info()->restart_block.fn = do_no_restart_syscall;
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err |= __get_user(regs->cp0_epc, &sc->sc_pc);
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err |= __get_user(regs->hi, &sc->sc_mdhi);
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err |= __get_user(regs->lo, &sc->sc_mdlo);
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if (cpu_has_dsp) {
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err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
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err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
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err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
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err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
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err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
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err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
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err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
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}
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for (i = 1; i < 32; i++)
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err |= __get_user(regs->regs[i], &sc->sc_regs[i]);
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err |= __get_user(used_math, &sc->sc_used_math);
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conditional_used_math(used_math);
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2007-03-10 00:07:45 +08:00
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if (used_math) {
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2007-02-05 22:24:25 +08:00
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/* restore fpu context if we have used it before */
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2007-03-10 00:03:48 +08:00
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if (!err)
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err = check_and_restore_fp_context32(sc);
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2007-02-05 22:24:25 +08:00
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} else {
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/* signal handler may have used FPU. Give it up. */
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2007-03-10 00:07:45 +08:00
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lose_fpu(0);
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2007-02-05 22:24:25 +08:00
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}
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return err;
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}
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/*
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*
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*/
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2005-04-17 06:20:36 +08:00
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extern void __put_sigset_unknown_nsig(void);
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extern void __get_sigset_unknown_nsig(void);
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2006-02-01 00:41:09 +08:00
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static inline int put_sigset(const sigset_t *kbuf, compat_sigset_t __user *ubuf)
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2005-04-17 06:20:36 +08:00
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{
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int err = 0;
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if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)))
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return -EFAULT;
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switch (_NSIG_WORDS) {
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default:
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__put_sigset_unknown_nsig();
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case 2:
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err |= __put_user (kbuf->sig[1] >> 32, &ubuf->sig[3]);
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err |= __put_user (kbuf->sig[1] & 0xffffffff, &ubuf->sig[2]);
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case 1:
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|
|
|
err |= __put_user (kbuf->sig[0] >> 32, &ubuf->sig[1]);
|
|
|
|
err |= __put_user (kbuf->sig[0] & 0xffffffff, &ubuf->sig[0]);
|
|
|
|
}
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2006-02-19 22:46:44 +08:00
|
|
|
static inline int get_sigset(sigset_t *kbuf, const compat_sigset_t __user *ubuf)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
int err = 0;
|
|
|
|
unsigned long sig[4];
|
|
|
|
|
|
|
|
if (!access_ok(VERIFY_READ, ubuf, sizeof(*ubuf)))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
switch (_NSIG_WORDS) {
|
|
|
|
default:
|
|
|
|
__get_sigset_unknown_nsig();
|
|
|
|
case 2:
|
|
|
|
err |= __get_user (sig[3], &ubuf->sig[3]);
|
|
|
|
err |= __get_user (sig[2], &ubuf->sig[2]);
|
|
|
|
kbuf->sig[1] = sig[2] | (sig[3] << 32);
|
|
|
|
case 1:
|
|
|
|
err |= __get_user (sig[1], &ubuf->sig[1]);
|
|
|
|
err |= __get_user (sig[0], &ubuf->sig[0]);
|
|
|
|
kbuf->sig[0] = sig[0] | (sig[1] << 32);
|
|
|
|
}
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Atomically swap in the new signal mask, and wait for a signal.
|
|
|
|
*/
|
|
|
|
|
2007-02-05 22:24:27 +08:00
|
|
|
asmlinkage int sys32_sigsuspend(nabi_no_regargs struct pt_regs regs)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2006-02-19 22:46:44 +08:00
|
|
|
compat_sigset_t __user *uset;
|
2006-02-18 22:55:45 +08:00
|
|
|
sigset_t newset;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-02-19 22:46:44 +08:00
|
|
|
uset = (compat_sigset_t __user *) regs.regs[4];
|
2005-04-17 06:20:36 +08:00
|
|
|
if (get_sigset(&newset, uset))
|
|
|
|
return -EFAULT;
|
|
|
|
sigdelsetmask(&newset, ~_BLOCKABLE);
|
|
|
|
|
|
|
|
spin_lock_irq(¤t->sighand->siglock);
|
2006-02-18 22:55:45 +08:00
|
|
|
current->saved_sigmask = current->blocked;
|
2005-04-17 06:20:36 +08:00
|
|
|
current->blocked = newset;
|
|
|
|
recalc_sigpending();
|
|
|
|
spin_unlock_irq(¤t->sighand->siglock);
|
|
|
|
|
2006-02-18 22:55:45 +08:00
|
|
|
current->state = TASK_INTERRUPTIBLE;
|
|
|
|
schedule();
|
|
|
|
set_thread_flag(TIF_RESTORE_SIGMASK);
|
|
|
|
return -ERESTARTNOHAND;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2007-02-05 22:24:27 +08:00
|
|
|
asmlinkage int sys32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2006-02-19 22:46:44 +08:00
|
|
|
compat_sigset_t __user *uset;
|
2006-02-18 22:55:45 +08:00
|
|
|
sigset_t newset;
|
2006-02-19 02:20:47 +08:00
|
|
|
size_t sigsetsize;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* XXX Don't preclude handling different sized sigset_t's. */
|
|
|
|
sigsetsize = regs.regs[5];
|
|
|
|
if (sigsetsize != sizeof(compat_sigset_t))
|
|
|
|
return -EINVAL;
|
|
|
|
|
2006-02-19 22:46:44 +08:00
|
|
|
uset = (compat_sigset_t __user *) regs.regs[4];
|
2005-04-17 06:20:36 +08:00
|
|
|
if (get_sigset(&newset, uset))
|
|
|
|
return -EFAULT;
|
|
|
|
sigdelsetmask(&newset, ~_BLOCKABLE);
|
|
|
|
|
|
|
|
spin_lock_irq(¤t->sighand->siglock);
|
2006-02-18 22:55:45 +08:00
|
|
|
current->saved_sigmask = current->blocked;
|
2005-04-17 06:20:36 +08:00
|
|
|
current->blocked = newset;
|
2006-02-19 04:06:32 +08:00
|
|
|
recalc_sigpending();
|
2005-04-17 06:20:36 +08:00
|
|
|
spin_unlock_irq(¤t->sighand->siglock);
|
|
|
|
|
2006-02-18 22:55:45 +08:00
|
|
|
current->state = TASK_INTERRUPTIBLE;
|
|
|
|
schedule();
|
|
|
|
set_thread_flag(TIF_RESTORE_SIGMASK);
|
|
|
|
return -ERESTARTNOHAND;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2006-02-19 22:46:44 +08:00
|
|
|
asmlinkage int sys32_sigaction(int sig, const struct sigaction32 __user *act,
|
|
|
|
struct sigaction32 __user *oact)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
struct k_sigaction new_ka, old_ka;
|
|
|
|
int ret;
|
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
if (act) {
|
|
|
|
old_sigset_t mask;
|
2005-03-05 03:36:51 +08:00
|
|
|
s32 handler;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
if (!access_ok(VERIFY_READ, act, sizeof(*act)))
|
|
|
|
return -EFAULT;
|
2005-03-05 03:36:51 +08:00
|
|
|
err |= __get_user(handler, &act->sa_handler);
|
2006-02-01 00:41:09 +08:00
|
|
|
new_ka.sa.sa_handler = (void __user *)(s64)handler;
|
2005-04-17 06:20:36 +08:00
|
|
|
err |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
|
|
|
|
err |= __get_user(mask, &act->sa_mask.sig[0]);
|
|
|
|
if (err)
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
siginitset(&new_ka.sa.sa_mask, mask);
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
|
|
|
|
|
|
|
|
if (!ret && oact) {
|
|
|
|
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
|
2006-02-19 04:06:32 +08:00
|
|
|
return -EFAULT;
|
2005-04-17 06:20:36 +08:00
|
|
|
err |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
|
|
|
|
err |= __put_user((u32)(u64)old_ka.sa.sa_handler,
|
|
|
|
&oact->sa_handler);
|
|
|
|
err |= __put_user(old_ka.sa.sa_mask.sig[0], oact->sa_mask.sig);
|
2006-02-19 04:06:32 +08:00
|
|
|
err |= __put_user(0, &oact->sa_mask.sig[1]);
|
|
|
|
err |= __put_user(0, &oact->sa_mask.sig[2]);
|
|
|
|
err |= __put_user(0, &oact->sa_mask.sig[3]);
|
|
|
|
if (err)
|
2005-04-17 06:20:36 +08:00
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
asmlinkage int sys32_sigaltstack(nabi_no_regargs struct pt_regs regs)
|
|
|
|
{
|
2006-02-01 00:41:09 +08:00
|
|
|
const stack32_t __user *uss = (const stack32_t __user *) regs.regs[4];
|
|
|
|
stack32_t __user *uoss = (stack32_t __user *) regs.regs[5];
|
2005-04-17 06:20:36 +08:00
|
|
|
unsigned long usp = regs.regs[29];
|
|
|
|
stack_t kss, koss;
|
|
|
|
int ret, err = 0;
|
|
|
|
mm_segment_t old_fs = get_fs();
|
|
|
|
s32 sp;
|
|
|
|
|
|
|
|
if (uss) {
|
|
|
|
if (!access_ok(VERIFY_READ, uss, sizeof(*uss)))
|
|
|
|
return -EFAULT;
|
|
|
|
err |= __get_user(sp, &uss->ss_sp);
|
2006-02-19 22:46:44 +08:00
|
|
|
kss.ss_sp = (void __user *) (long) sp;
|
2005-04-17 06:20:36 +08:00
|
|
|
err |= __get_user(kss.ss_size, &uss->ss_size);
|
|
|
|
err |= __get_user(kss.ss_flags, &uss->ss_flags);
|
|
|
|
if (err)
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
|
|
|
|
set_fs (KERNEL_DS);
|
2006-02-01 00:41:09 +08:00
|
|
|
ret = do_sigaltstack(uss ? (stack_t __user *)&kss : NULL,
|
|
|
|
uoss ? (stack_t __user *)&koss : NULL, usp);
|
2005-04-17 06:20:36 +08:00
|
|
|
set_fs (old_fs);
|
|
|
|
|
|
|
|
if (!ret && uoss) {
|
|
|
|
if (!access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)))
|
|
|
|
return -EFAULT;
|
2006-02-19 22:46:44 +08:00
|
|
|
sp = (int) (unsigned long) koss.ss_sp;
|
2005-04-17 06:20:36 +08:00
|
|
|
err |= __put_user(sp, &uoss->ss_sp);
|
|
|
|
err |= __put_user(koss.ss_size, &uoss->ss_size);
|
|
|
|
err |= __put_user(koss.ss_flags, &uoss->ss_flags);
|
|
|
|
if (err)
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2006-02-01 00:41:09 +08:00
|
|
|
int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
|
|
|
if (!access_ok (VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
/* If you change siginfo_t structure, please be sure
|
|
|
|
this code is fixed accordingly.
|
|
|
|
It should never copy any pad contained in the structure
|
|
|
|
to avoid security leaks, but must copy the generic
|
|
|
|
3 ints plus the relevant union member.
|
|
|
|
This routine must convert siginfo from 64bit to 32bit as well
|
|
|
|
at the same time. */
|
|
|
|
err = __put_user(from->si_signo, &to->si_signo);
|
|
|
|
err |= __put_user(from->si_errno, &to->si_errno);
|
|
|
|
err |= __put_user((short)from->si_code, &to->si_code);
|
|
|
|
if (from->si_code < 0)
|
|
|
|
err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
|
|
|
|
else {
|
|
|
|
switch (from->si_code >> 16) {
|
2005-02-17 05:24:16 +08:00
|
|
|
case __SI_TIMER >> 16:
|
|
|
|
err |= __put_user(from->si_tid, &to->si_tid);
|
|
|
|
err |= __put_user(from->si_overrun, &to->si_overrun);
|
|
|
|
err |= __put_user(from->si_int, &to->si_int);
|
|
|
|
break;
|
2005-04-17 06:20:36 +08:00
|
|
|
case __SI_CHLD >> 16:
|
|
|
|
err |= __put_user(from->si_utime, &to->si_utime);
|
|
|
|
err |= __put_user(from->si_stime, &to->si_stime);
|
|
|
|
err |= __put_user(from->si_status, &to->si_status);
|
|
|
|
default:
|
|
|
|
err |= __put_user(from->si_pid, &to->si_pid);
|
|
|
|
err |= __put_user(from->si_uid, &to->si_uid);
|
|
|
|
break;
|
|
|
|
case __SI_FAULT >> 16:
|
2006-02-02 00:26:34 +08:00
|
|
|
err |= __put_user((unsigned long)from->si_addr, &to->si_addr);
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
case __SI_POLL >> 16:
|
|
|
|
err |= __put_user(from->si_band, &to->si_band);
|
|
|
|
err |= __put_user(from->si_fd, &to->si_fd);
|
|
|
|
break;
|
|
|
|
case __SI_RT >> 16: /* This is not generated by the kernel as of now. */
|
|
|
|
case __SI_MESGQ >> 16:
|
|
|
|
err |= __put_user(from->si_pid, &to->si_pid);
|
|
|
|
err |= __put_user(from->si_uid, &to->si_uid);
|
|
|
|
err |= __put_user(from->si_int, &to->si_int);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2007-02-05 22:24:27 +08:00
|
|
|
asmlinkage void sys32_sigreturn(nabi_no_regargs struct pt_regs regs)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2007-02-13 08:50:57 +08:00
|
|
|
struct sigframe32 __user *frame;
|
2005-04-17 06:20:36 +08:00
|
|
|
sigset_t blocked;
|
2007-03-10 00:03:48 +08:00
|
|
|
int sig;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2007-02-13 08:50:57 +08:00
|
|
|
frame = (struct sigframe32 __user *) regs.regs[29];
|
2005-04-17 06:20:36 +08:00
|
|
|
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
|
|
|
|
goto badframe;
|
2007-02-13 08:05:11 +08:00
|
|
|
if (__copy_conv_sigset_from_user(&blocked, &frame->sf_mask))
|
2005-04-17 06:20:36 +08:00
|
|
|
goto badframe;
|
|
|
|
|
|
|
|
sigdelsetmask(&blocked, ~_BLOCKABLE);
|
|
|
|
spin_lock_irq(¤t->sighand->siglock);
|
|
|
|
current->blocked = blocked;
|
|
|
|
recalc_sigpending();
|
|
|
|
spin_unlock_irq(¤t->sighand->siglock);
|
|
|
|
|
2007-03-10 00:03:48 +08:00
|
|
|
sig = restore_sigcontext32(®s, &frame->sf_sc);
|
|
|
|
if (sig < 0)
|
2005-04-17 06:20:36 +08:00
|
|
|
goto badframe;
|
2007-03-10 00:03:48 +08:00
|
|
|
else if (sig)
|
|
|
|
force_sig(sig, current);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Don't let your children do this ...
|
|
|
|
*/
|
|
|
|
__asm__ __volatile__(
|
|
|
|
"move\t$29, %0\n\t"
|
|
|
|
"j\tsyscall_exit"
|
|
|
|
:/* no outputs */
|
|
|
|
:"r" (®s));
|
|
|
|
/* Unreached */
|
|
|
|
|
|
|
|
badframe:
|
|
|
|
force_sig(SIGSEGV, current);
|
|
|
|
}
|
|
|
|
|
2007-02-05 22:24:27 +08:00
|
|
|
asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2006-02-01 00:41:09 +08:00
|
|
|
struct rt_sigframe32 __user *frame;
|
2005-04-14 02:18:04 +08:00
|
|
|
mm_segment_t old_fs;
|
2005-04-17 06:20:36 +08:00
|
|
|
sigset_t set;
|
|
|
|
stack_t st;
|
|
|
|
s32 sp;
|
2007-03-10 00:03:48 +08:00
|
|
|
int sig;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-02-01 00:41:09 +08:00
|
|
|
frame = (struct rt_sigframe32 __user *) regs.regs[29];
|
2005-04-17 06:20:36 +08:00
|
|
|
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
|
|
|
|
goto badframe;
|
2007-02-13 08:05:11 +08:00
|
|
|
if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask))
|
2005-04-17 06:20:36 +08:00
|
|
|
goto badframe;
|
|
|
|
|
|
|
|
sigdelsetmask(&set, ~_BLOCKABLE);
|
|
|
|
spin_lock_irq(¤t->sighand->siglock);
|
|
|
|
current->blocked = set;
|
|
|
|
recalc_sigpending();
|
|
|
|
spin_unlock_irq(¤t->sighand->siglock);
|
|
|
|
|
2007-03-10 00:03:48 +08:00
|
|
|
sig = restore_sigcontext32(®s, &frame->rs_uc.uc_mcontext);
|
|
|
|
if (sig < 0)
|
2005-04-17 06:20:36 +08:00
|
|
|
goto badframe;
|
2007-03-10 00:03:48 +08:00
|
|
|
else if (sig)
|
|
|
|
force_sig(sig, current);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* The ucontext contains a stack32_t, so we must convert! */
|
|
|
|
if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp))
|
|
|
|
goto badframe;
|
2006-02-19 22:46:44 +08:00
|
|
|
st.ss_sp = (void __user *)(long) sp;
|
2005-04-17 06:20:36 +08:00
|
|
|
if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size))
|
|
|
|
goto badframe;
|
|
|
|
if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags))
|
|
|
|
goto badframe;
|
|
|
|
|
|
|
|
/* It is more difficult to avoid calling this function than to
|
|
|
|
call it and ignore errors. */
|
2005-04-14 02:18:04 +08:00
|
|
|
old_fs = get_fs();
|
|
|
|
set_fs (KERNEL_DS);
|
2006-02-01 00:41:09 +08:00
|
|
|
do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]);
|
2005-04-14 02:18:04 +08:00
|
|
|
set_fs (old_fs);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Don't let your children do this ...
|
|
|
|
*/
|
|
|
|
__asm__ __volatile__(
|
|
|
|
"move\t$29, %0\n\t"
|
|
|
|
"j\tsyscall_exit"
|
|
|
|
:/* no outputs */
|
|
|
|
:"r" (®s));
|
|
|
|
/* Unreached */
|
|
|
|
|
|
|
|
badframe:
|
|
|
|
force_sig(SIGSEGV, current);
|
|
|
|
}
|
|
|
|
|
2007-02-15 19:40:37 +08:00
|
|
|
static int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
|
2005-11-05 22:00:58 +08:00
|
|
|
int signr, sigset_t *set)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2007-02-13 08:50:57 +08:00
|
|
|
struct sigframe32 __user *frame;
|
2005-04-17 06:20:36 +08:00
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
frame = get_sigframe(ka, regs, sizeof(*frame));
|
|
|
|
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
|
|
|
|
goto give_sigsegv;
|
|
|
|
|
2007-02-05 22:24:22 +08:00
|
|
|
err |= install_sigtramp(frame->sf_code, __NR_O32_sigreturn);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
err |= setup_sigcontext32(regs, &frame->sf_sc);
|
2007-02-13 08:05:11 +08:00
|
|
|
err |= __copy_conv_sigset_to_user(&frame->sf_mask, set);
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
if (err)
|
|
|
|
goto give_sigsegv;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Arguments to signal handler:
|
|
|
|
*
|
|
|
|
* a0 = signal number
|
|
|
|
* a1 = 0 (should be cause)
|
|
|
|
* a2 = pointer to struct sigcontext
|
|
|
|
*
|
|
|
|
* $25 and c0_epc point to the signal handler, $29 points to the
|
|
|
|
* struct sigframe.
|
|
|
|
*/
|
|
|
|
regs->regs[ 4] = signr;
|
|
|
|
regs->regs[ 5] = 0;
|
|
|
|
regs->regs[ 6] = (unsigned long) &frame->sf_sc;
|
|
|
|
regs->regs[29] = (unsigned long) frame;
|
|
|
|
regs->regs[31] = (unsigned long) frame->sf_code;
|
|
|
|
regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
|
|
|
|
|
2007-02-05 22:24:24 +08:00
|
|
|
DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
|
2005-04-17 06:20:36 +08:00
|
|
|
current->comm, current->pid,
|
2007-02-05 22:24:24 +08:00
|
|
|
frame, regs->cp0_epc, regs->regs[31]);
|
|
|
|
|
2006-02-08 20:58:41 +08:00
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
give_sigsegv:
|
|
|
|
force_sigsegv(signr, current);
|
2006-02-08 20:58:41 +08:00
|
|
|
return -EFAULT;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2007-02-15 19:40:37 +08:00
|
|
|
static int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
|
2005-11-05 22:00:58 +08:00
|
|
|
int signr, sigset_t *set, siginfo_t *info)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2006-02-01 00:41:09 +08:00
|
|
|
struct rt_sigframe32 __user *frame;
|
2005-04-17 06:20:36 +08:00
|
|
|
int err = 0;
|
|
|
|
s32 sp;
|
|
|
|
|
|
|
|
frame = get_sigframe(ka, regs, sizeof(*frame));
|
|
|
|
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
|
|
|
|
goto give_sigsegv;
|
|
|
|
|
2007-02-05 22:24:22 +08:00
|
|
|
err |= install_sigtramp(frame->rs_code, __NR_O32_rt_sigreturn);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* Convert (siginfo_t -> compat_siginfo_t) and copy to user. */
|
|
|
|
err |= copy_siginfo_to_user32(&frame->rs_info, info);
|
|
|
|
|
|
|
|
/* Create the ucontext. */
|
|
|
|
err |= __put_user(0, &frame->rs_uc.uc_flags);
|
|
|
|
err |= __put_user(0, &frame->rs_uc.uc_link);
|
|
|
|
sp = (int) (long) current->sas_ss_sp;
|
|
|
|
err |= __put_user(sp,
|
|
|
|
&frame->rs_uc.uc_stack.ss_sp);
|
|
|
|
err |= __put_user(sas_ss_flags(regs->regs[29]),
|
|
|
|
&frame->rs_uc.uc_stack.ss_flags);
|
|
|
|
err |= __put_user(current->sas_ss_size,
|
|
|
|
&frame->rs_uc.uc_stack.ss_size);
|
|
|
|
err |= setup_sigcontext32(regs, &frame->rs_uc.uc_mcontext);
|
2007-02-13 08:05:11 +08:00
|
|
|
err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
if (err)
|
|
|
|
goto give_sigsegv;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Arguments to signal handler:
|
|
|
|
*
|
|
|
|
* a0 = signal number
|
|
|
|
* a1 = 0 (should be cause)
|
|
|
|
* a2 = pointer to ucontext
|
|
|
|
*
|
|
|
|
* $25 and c0_epc point to the signal handler, $29 points to
|
|
|
|
* the struct rt_sigframe32.
|
|
|
|
*/
|
|
|
|
regs->regs[ 4] = signr;
|
|
|
|
regs->regs[ 5] = (unsigned long) &frame->rs_info;
|
|
|
|
regs->regs[ 6] = (unsigned long) &frame->rs_uc;
|
|
|
|
regs->regs[29] = (unsigned long) frame;
|
|
|
|
regs->regs[31] = (unsigned long) frame->rs_code;
|
|
|
|
regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
|
|
|
|
|
2007-02-05 22:24:24 +08:00
|
|
|
DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
|
2005-04-17 06:20:36 +08:00
|
|
|
current->comm, current->pid,
|
2007-02-05 22:24:24 +08:00
|
|
|
frame, regs->cp0_epc, regs->regs[31]);
|
|
|
|
|
2006-02-08 20:58:41 +08:00
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
give_sigsegv:
|
|
|
|
force_sigsegv(signr, current);
|
2006-02-08 20:58:41 +08:00
|
|
|
return -EFAULT;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2007-02-15 19:40:37 +08:00
|
|
|
/*
|
|
|
|
* o32 compatibility on 64-bit kernels, without DSP ASE
|
|
|
|
*/
|
|
|
|
struct mips_abi mips_abi_32 = {
|
|
|
|
.setup_frame = setup_frame_32,
|
|
|
|
.setup_rt_frame = setup_rt_frame_32,
|
|
|
|
.restart = __NR_O32_restart_syscall
|
|
|
|
};
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-02-19 22:46:44 +08:00
|
|
|
asmlinkage int sys32_rt_sigaction(int sig, const struct sigaction32 __user *act,
|
2006-02-01 00:41:09 +08:00
|
|
|
struct sigaction32 __user *oact,
|
2005-04-17 06:20:36 +08:00
|
|
|
unsigned int sigsetsize)
|
|
|
|
{
|
|
|
|
struct k_sigaction new_sa, old_sa;
|
|
|
|
int ret = -EINVAL;
|
|
|
|
|
|
|
|
/* XXX: Don't preclude handling different sized sigset_t's. */
|
|
|
|
if (sigsetsize != sizeof(sigset_t))
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if (act) {
|
2005-03-05 03:36:51 +08:00
|
|
|
s32 handler;
|
2005-04-17 06:20:36 +08:00
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
if (!access_ok(VERIFY_READ, act, sizeof(*act)))
|
|
|
|
return -EFAULT;
|
2005-03-05 03:36:51 +08:00
|
|
|
err |= __get_user(handler, &act->sa_handler);
|
2006-02-01 00:41:09 +08:00
|
|
|
new_sa.sa.sa_handler = (void __user *)(s64)handler;
|
2005-04-17 06:20:36 +08:00
|
|
|
err |= __get_user(new_sa.sa.sa_flags, &act->sa_flags);
|
|
|
|
err |= get_sigset(&new_sa.sa.sa_mask, &act->sa_mask);
|
|
|
|
if (err)
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL);
|
|
|
|
|
|
|
|
if (!ret && oact) {
|
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
err |= __put_user((u32)(u64)old_sa.sa.sa_handler,
|
|
|
|
&oact->sa_handler);
|
|
|
|
err |= __put_user(old_sa.sa.sa_flags, &oact->sa_flags);
|
|
|
|
err |= put_sigset(&old_sa.sa.sa_mask, &oact->sa_mask);
|
|
|
|
if (err)
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2006-02-19 22:46:44 +08:00
|
|
|
asmlinkage int sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
|
2006-02-01 00:41:09 +08:00
|
|
|
compat_sigset_t __user *oset, unsigned int sigsetsize)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
sigset_t old_set, new_set;
|
|
|
|
int ret;
|
|
|
|
mm_segment_t old_fs = get_fs();
|
|
|
|
|
|
|
|
if (set && get_sigset(&new_set, set))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
set_fs (KERNEL_DS);
|
2006-02-01 00:41:09 +08:00
|
|
|
ret = sys_rt_sigprocmask(how, set ? (sigset_t __user *)&new_set : NULL,
|
|
|
|
oset ? (sigset_t __user *)&old_set : NULL,
|
|
|
|
sigsetsize);
|
2005-04-17 06:20:36 +08:00
|
|
|
set_fs (old_fs);
|
|
|
|
|
|
|
|
if (!ret && oset && put_sigset(&old_set, oset))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2006-02-01 00:41:09 +08:00
|
|
|
asmlinkage int sys32_rt_sigpending(compat_sigset_t __user *uset,
|
2005-04-17 06:20:36 +08:00
|
|
|
unsigned int sigsetsize)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
sigset_t set;
|
|
|
|
mm_segment_t old_fs = get_fs();
|
|
|
|
|
|
|
|
set_fs (KERNEL_DS);
|
2006-02-01 00:41:09 +08:00
|
|
|
ret = sys_rt_sigpending((sigset_t __user *)&set, sigsetsize);
|
2005-04-17 06:20:36 +08:00
|
|
|
set_fs (old_fs);
|
|
|
|
|
|
|
|
if (!ret && put_sigset(&set, uset))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2006-02-01 00:41:09 +08:00
|
|
|
asmlinkage int sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
siginfo_t info;
|
|
|
|
int ret;
|
|
|
|
mm_segment_t old_fs = get_fs();
|
|
|
|
|
|
|
|
if (copy_from_user (&info, uinfo, 3*sizeof(int)) ||
|
|
|
|
copy_from_user (info._sifields._pad, uinfo->_sifields._pad, SI_PAD_SIZE))
|
|
|
|
return -EFAULT;
|
|
|
|
set_fs (KERNEL_DS);
|
2006-02-01 00:41:09 +08:00
|
|
|
ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
|
2005-04-17 06:20:36 +08:00
|
|
|
set_fs (old_fs);
|
|
|
|
return ret;
|
|
|
|
}
|
2005-02-17 05:21:29 +08:00
|
|
|
|
|
|
|
asmlinkage long
|
|
|
|
sys32_waitid(int which, compat_pid_t pid,
|
|
|
|
compat_siginfo_t __user *uinfo, int options,
|
|
|
|
struct compat_rusage __user *uru)
|
|
|
|
{
|
|
|
|
siginfo_t info;
|
|
|
|
struct rusage ru;
|
|
|
|
long ret;
|
|
|
|
mm_segment_t old_fs = get_fs();
|
|
|
|
|
|
|
|
info.si_signo = 0;
|
|
|
|
set_fs (KERNEL_DS);
|
|
|
|
ret = sys_waitid(which, pid, (siginfo_t __user *) &info, options,
|
|
|
|
uru ? (struct rusage __user *) &ru : NULL);
|
|
|
|
set_fs (old_fs);
|
|
|
|
|
|
|
|
if (ret < 0 || info.si_signo == 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
if (uru && (ret = put_compat_rusage(&ru, uru)))
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
BUG_ON(info.si_code & __SI_MASK);
|
|
|
|
info.si_code |= __SI_CHLD;
|
|
|
|
return copy_siginfo_to_user32(uinfo, &info);
|
|
|
|
}
|