78b73f3e05
- Return NULL instead of returning memory outside of the stackgap in stackgap_alloc() (FreeBSD-SA-00:42.linux) - Check for stackgap_alloc() returning NULL in svr4_emul_find(), and clean_pipe(). - Avoid integer overflow on large nfds argument in svr4_sys_poll() - Reject negative nbytes argument in svr4_sys_getdents() - Don't copy out past the end of the struct componentname pathname buffer in svr4_sys_resolvepath() - Reject out-of-range signal numbers in svr4_sys_sigaction(), svr4_sys_signal(), and svr4_sys_kill(). - Don't malloc() user-specified lengths in show_ioc() and show_strbuf(), place arbitrary limits instead. - Range-check lengths in si_listen(), ti_getinfo(), ti_bind(), svr4_do_putmsg(), svr4_do_getmsg(), svr4_stream_ti_ioctl(). Some fixes obtain from OpenBSD.
580 lines
13 KiB
C
580 lines
13 KiB
C
/*
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* Copyright (c) 1998 Mark Newton
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* Copyright (c) 1994 Christos Zoulas
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/filedesc.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/signal.h>
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#include <sys/signalvar.h>
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#include <sys/syscallsubr.h>
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#include <sys/sysproto.h>
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#include <machine/cpu.h>
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#include <compat/svr4/svr4.h>
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#include <compat/svr4/svr4_types.h>
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#include <compat/svr4/svr4_signal.h>
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#include <compat/svr4/svr4_proto.h>
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#include <compat/svr4/svr4_util.h>
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#include <compat/svr4/svr4_ucontext.h>
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#define svr4_sigmask(n) (1 << (((n) - 1) & 31))
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#define svr4_sigword(n) (((n) - 1) >> 5)
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#define svr4_sigemptyset(s) memset((s), 0, sizeof(*(s)))
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#define svr4_sigismember(s, n) ((s)->bits[svr4_sigword(n)] & svr4_sigmask(n))
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#define svr4_sigaddset(s, n) ((s)->bits[svr4_sigword(n)] |= svr4_sigmask(n))
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void svr4_to_bsd_sigaction(const struct svr4_sigaction *, struct sigaction *);
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void bsd_to_svr4_sigaction(const struct sigaction *, struct svr4_sigaction *);
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void svr4_sigfillset(svr4_sigset_t *);
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int bsd_to_svr4_sig[SVR4_SIGTBLSZ] = {
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SVR4_SIGHUP,
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SVR4_SIGINT,
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SVR4_SIGQUIT,
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SVR4_SIGILL,
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SVR4_SIGTRAP,
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SVR4_SIGABRT,
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SVR4_SIGEMT,
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SVR4_SIGFPE,
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SVR4_SIGKILL,
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SVR4_SIGBUS,
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SVR4_SIGSEGV,
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SVR4_SIGSYS,
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SVR4_SIGPIPE,
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SVR4_SIGALRM,
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SVR4_SIGTERM,
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SVR4_SIGURG,
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SVR4_SIGSTOP,
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SVR4_SIGTSTP,
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SVR4_SIGCONT,
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SVR4_SIGCHLD,
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SVR4_SIGTTIN,
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SVR4_SIGTTOU,
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SVR4_SIGIO,
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SVR4_SIGXCPU,
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SVR4_SIGXFSZ,
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SVR4_SIGVTALRM,
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SVR4_SIGPROF,
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SVR4_SIGWINCH,
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0, /* SIGINFO */
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SVR4_SIGUSR1,
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SVR4_SIGUSR2,
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};
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int svr4_to_bsd_sig[SVR4_SIGTBLSZ] = {
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SIGHUP,
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SIGINT,
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SIGQUIT,
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SIGILL,
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SIGTRAP,
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SIGABRT,
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SIGEMT,
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SIGFPE,
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SIGKILL,
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SIGBUS,
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SIGSEGV,
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SIGSYS,
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SIGPIPE,
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SIGALRM,
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SIGTERM,
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SIGUSR1,
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SIGUSR2,
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SIGCHLD,
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0, /* XXX NetBSD uses SIGPWR here, but we don't seem to have one */
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SIGWINCH,
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SIGURG,
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SIGIO,
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SIGSTOP,
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SIGTSTP,
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SIGCONT,
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SIGTTIN,
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SIGTTOU,
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SIGVTALRM,
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SIGPROF,
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SIGXCPU,
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SIGXFSZ,
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};
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void
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svr4_sigfillset(s)
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svr4_sigset_t *s;
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{
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int i;
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svr4_sigemptyset(s);
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for (i = 0; i < SVR4_NSIG; i++)
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if (svr4_to_bsd_sig[i] != 0)
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svr4_sigaddset(s, i);
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}
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void
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svr4_to_bsd_sigset(sss, bss)
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const svr4_sigset_t *sss;
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sigset_t *bss;
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{
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int i, newsig;
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SIGEMPTYSET(*bss);
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for (i = 0; i < SVR4_NSIG; i++)
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if (svr4_sigismember(sss, i + 1)) {
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newsig = svr4_to_bsd_sig[i];
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if (newsig)
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SIGADDSET(*bss, newsig);
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}
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}
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void
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bsd_to_svr4_sigset(bss, sss)
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const sigset_t *bss;
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svr4_sigset_t *sss;
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{
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int i, newsig;
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svr4_sigemptyset(sss);
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sss->bits[0] = bss->__bits[0] & ~((1U << SVR4_SIGTBLSZ) - 1);
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sss->bits[1] = bss->__bits[1];
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sss->bits[2] = bss->__bits[2];
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sss->bits[3] = bss->__bits[3];
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for (i = 1; i <= SVR4_SIGTBLSZ; i++) {
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if (SIGISMEMBER(*bss, i)) {
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newsig = bsd_to_svr4_sig[_SIG_IDX(i)];
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if (newsig)
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svr4_sigaddset(sss, newsig);
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}
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}
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}
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/*
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* XXX: Only a subset of the flags is currently implemented.
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*/
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void
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svr4_to_bsd_sigaction(ssa, bsa)
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const struct svr4_sigaction *ssa;
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struct sigaction *bsa;
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{
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bsa->sa_handler = (sig_t) ssa->ssa_handler;
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svr4_to_bsd_sigset(&ssa->ssa_mask, &bsa->sa_mask);
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bsa->sa_flags = 0;
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if ((ssa->ssa_flags & SVR4_SA_ONSTACK) != 0)
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bsa->sa_flags |= SA_ONSTACK;
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if ((ssa->ssa_flags & SVR4_SA_RESETHAND) != 0)
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bsa->sa_flags |= SA_RESETHAND;
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if ((ssa->ssa_flags & SVR4_SA_RESTART) != 0)
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bsa->sa_flags |= SA_RESTART;
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if ((ssa->ssa_flags & SVR4_SA_SIGINFO) != 0)
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DPRINTF(("svr4_to_bsd_sigaction: SA_SIGINFO ignored\n"));
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if ((ssa->ssa_flags & SVR4_SA_NOCLDSTOP) != 0)
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bsa->sa_flags |= SA_NOCLDSTOP;
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if ((ssa->ssa_flags & SVR4_SA_NODEFER) != 0)
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bsa->sa_flags |= SA_NODEFER;
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if ((ssa->ssa_flags & SVR4_SA_NOCLDWAIT) != 0)
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bsa->sa_flags |= SA_NOCLDWAIT;
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if ((ssa->ssa_flags & ~SVR4_SA_ALLBITS) != 0)
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DPRINTF(("svr4_to_bsd_sigaction: extra bits ignored\n"));
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}
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void
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bsd_to_svr4_sigaction(bsa, ssa)
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const struct sigaction *bsa;
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struct svr4_sigaction *ssa;
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{
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ssa->ssa_handler = (svr4_sig_t) bsa->sa_handler;
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bsd_to_svr4_sigset(&bsa->sa_mask, &ssa->ssa_mask);
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ssa->ssa_flags = 0;
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if ((bsa->sa_flags & SA_ONSTACK) != 0)
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ssa->ssa_flags |= SVR4_SA_ONSTACK;
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if ((bsa->sa_flags & SA_RESETHAND) != 0)
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ssa->ssa_flags |= SVR4_SA_RESETHAND;
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if ((bsa->sa_flags & SA_RESTART) != 0)
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ssa->ssa_flags |= SVR4_SA_RESTART;
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if ((bsa->sa_flags & SA_NODEFER) != 0)
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ssa->ssa_flags |= SVR4_SA_NODEFER;
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if ((bsa->sa_flags & SA_NOCLDSTOP) != 0)
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ssa->ssa_flags |= SVR4_SA_NOCLDSTOP;
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}
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void
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svr4_to_bsd_sigaltstack(sss, bss)
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const struct svr4_sigaltstack *sss;
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struct sigaltstack *bss;
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{
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bss->ss_sp = sss->ss_sp;
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bss->ss_size = sss->ss_size;
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bss->ss_flags = 0;
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if ((sss->ss_flags & SVR4_SS_DISABLE) != 0)
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bss->ss_flags |= SS_DISABLE;
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if ((sss->ss_flags & SVR4_SS_ONSTACK) != 0)
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bss->ss_flags |= SS_ONSTACK;
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if ((sss->ss_flags & ~SVR4_SS_ALLBITS) != 0)
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/*XXX*/ uprintf("svr4_to_bsd_sigaltstack: extra bits ignored\n");
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}
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void
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bsd_to_svr4_sigaltstack(bss, sss)
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const struct sigaltstack *bss;
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struct svr4_sigaltstack *sss;
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{
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sss->ss_sp = bss->ss_sp;
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sss->ss_size = bss->ss_size;
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sss->ss_flags = 0;
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if ((bss->ss_flags & SS_DISABLE) != 0)
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sss->ss_flags |= SVR4_SS_DISABLE;
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if ((bss->ss_flags & SS_ONSTACK) != 0)
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sss->ss_flags |= SVR4_SS_ONSTACK;
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}
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int
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svr4_sys_sigaction(td, uap)
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register struct thread *td;
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struct svr4_sys_sigaction_args *uap;
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{
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struct svr4_sigaction isa;
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struct sigaction nbsa, obsa;
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struct sigaction *nbsap;
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int error;
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if (uap->signum < 0 || uap->signum >= SVR4_NSIG)
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return (EINVAL);
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DPRINTF(("@@@ svr4_sys_sigaction(%d, %d, %d)\n", td->td_proc->p_pid,
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uap->signum,
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SVR4_SVR42BSD_SIG(uap->signum)));
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if (uap->nsa != NULL) {
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if ((error = copyin(uap->nsa, &isa, sizeof(isa))) != 0)
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return (error);
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svr4_to_bsd_sigaction(&isa, &nbsa);
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nbsap = &nbsa;
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} else
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nbsap = NULL;
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#if defined(DEBUG_SVR4)
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{
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int i;
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for (i = 0; i < 4; i++)
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DPRINTF(("\tssa_mask[%d] = %lx\n", i,
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isa.ssa_mask.bits[i]));
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DPRINTF(("\tssa_handler = %p\n", isa.ssa_handler));
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}
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#endif
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error = kern_sigaction(td, SVR4_SVR42BSD_SIG(uap->signum), nbsap, &obsa,
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0);
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if (error == 0 && uap->osa != NULL) {
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bsd_to_svr4_sigaction(&obsa, &isa);
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error = copyout(&isa, uap->osa, sizeof(isa));
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}
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return (error);
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}
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int
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svr4_sys_sigaltstack(td, uap)
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register struct thread *td;
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struct svr4_sys_sigaltstack_args *uap;
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{
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struct svr4_sigaltstack sss;
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struct sigaltstack nbss, obss, *nbssp;
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int error;
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if (uap->nss != NULL) {
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if ((error = copyin(uap->nss, &sss, sizeof(sss))) != 0)
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return (error);
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svr4_to_bsd_sigaltstack(&sss, &nbss);
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nbssp = &nbss;
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} else
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nbssp = NULL;
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error = kern_sigaltstack(td, nbssp, &obss);
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if (error == 0 && uap->oss != NULL) {
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bsd_to_svr4_sigaltstack(&obss, &sss);
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error = copyout(&sss, uap->oss, sizeof(sss));
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}
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return (error);
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}
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/*
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* Stolen from the ibcs2 one
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*/
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int
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svr4_sys_signal(td, uap)
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register struct thread *td;
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struct svr4_sys_signal_args *uap;
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{
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struct proc *p;
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int signum;
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int error;
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p = td->td_proc;
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DPRINTF(("@@@ svr4_sys_signal(%d)\n", p->p_pid));
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signum = SVR4_SIGNO(uap->signum);
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if (signum < 0 || signum >= SVR4_NSIG) {
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if (SVR4_SIGCALL(uap->signum) == SVR4_SIGNAL_MASK ||
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SVR4_SIGCALL(uap->signum) == SVR4_SIGDEFER_MASK)
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td->td_retval[0] = (int)SVR4_SIG_ERR;
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return (EINVAL);
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}
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signum = SVR4_SVR42BSD_SIG(signum);
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switch (SVR4_SIGCALL(uap->signum)) {
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case SVR4_SIGDEFER_MASK:
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if (uap->handler == SVR4_SIG_HOLD)
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goto sighold;
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/* FALLTHROUGH */
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case SVR4_SIGNAL_MASK:
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{
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struct sigaction nbsa, obsa;
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nbsa.sa_handler = (sig_t) uap->handler;
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SIGEMPTYSET(nbsa.sa_mask);
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nbsa.sa_flags = 0;
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if (signum != SIGALRM)
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nbsa.sa_flags = SA_RESTART;
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error = kern_sigaction(td, signum, &nbsa, &obsa, 0);
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if (error != 0) {
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DPRINTF(("signal: sigaction failed: %d\n",
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error));
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td->td_retval[0] = (int)SVR4_SIG_ERR;
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return (error);
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}
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td->td_retval[0] = (int)obsa.sa_handler;
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return (0);
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}
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case SVR4_SIGHOLD_MASK:
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sighold:
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{
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sigset_t set;
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SIGEMPTYSET(set);
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SIGADDSET(set, signum);
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return (kern_sigprocmask(td, SIG_BLOCK, &set, NULL, 0));
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}
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case SVR4_SIGRELSE_MASK:
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{
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sigset_t set;
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SIGEMPTYSET(set);
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SIGADDSET(set, signum);
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return (kern_sigprocmask(td, SIG_UNBLOCK, &set, NULL,
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0));
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}
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case SVR4_SIGIGNORE_MASK:
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{
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struct sigaction sa;
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sa.sa_handler = SIG_IGN;
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SIGEMPTYSET(sa.sa_mask);
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sa.sa_flags = 0;
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error = kern_sigaction(td, signum, &sa, NULL, 0);
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if (error != 0)
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DPRINTF(("sigignore: sigaction failed\n"));
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return (error);
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}
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case SVR4_SIGPAUSE_MASK:
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{
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sigset_t mask;
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PROC_LOCK(p);
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mask = td->td_sigmask;
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PROC_UNLOCK(p);
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SIGDELSET(mask, signum);
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return kern_sigsuspend(td, mask);
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}
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default:
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return (ENOSYS);
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}
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}
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int
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svr4_sys_sigprocmask(td, uap)
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struct thread *td;
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struct svr4_sys_sigprocmask_args *uap;
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{
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svr4_sigset_t sss;
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sigset_t oss, nss;
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sigset_t *nssp;
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int error;
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if (uap->set != NULL) {
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if ((error = copyin(uap->set, &sss, sizeof(sss))) != 0)
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return error;
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svr4_to_bsd_sigset(&sss, &nss);
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nssp = &nss;
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} else
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nssp = NULL;
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/* SVR/4 sigprocmask flag values are the same as the FreeBSD values. */
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error = kern_sigprocmask(td, uap->how, nssp, &oss, 0);
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if (error == 0 && uap->oset != NULL) {
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bsd_to_svr4_sigset(&oss, &sss);
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error = copyout(&sss, uap->oset, sizeof(sss));
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}
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return (error);
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}
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int
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svr4_sys_sigpending(td, uap)
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struct thread *td;
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struct svr4_sys_sigpending_args *uap;
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{
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struct proc *p;
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sigset_t bss;
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svr4_sigset_t sss;
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p = td->td_proc;
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DPRINTF(("@@@ svr4_sys_sigpending(%d)\n", p->p_pid));
|
|
switch (uap->what) {
|
|
case 1: /* sigpending */
|
|
if (uap->mask == NULL)
|
|
return 0;
|
|
PROC_LOCK(p);
|
|
bss = p->p_siglist;
|
|
SIGSETOR(bss, td->td_siglist);
|
|
SIGSETAND(bss, td->td_sigmask);
|
|
PROC_UNLOCK(p);
|
|
bsd_to_svr4_sigset(&bss, &sss);
|
|
break;
|
|
|
|
case 2: /* sigfillset */
|
|
svr4_sigfillset(&sss);
|
|
#if defined(DEBUG_SVR4)
|
|
{
|
|
int i;
|
|
for (i = 0; i < 4; i++)
|
|
DPRINTF(("new sigset[%d] = %lx\n", i, (long)sss.bits[i]));
|
|
}
|
|
#endif
|
|
break;
|
|
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
|
|
return copyout(&sss, uap->mask, sizeof(sss));
|
|
}
|
|
|
|
int
|
|
svr4_sys_sigsuspend(td, uap)
|
|
register struct thread *td;
|
|
struct svr4_sys_sigsuspend_args *uap;
|
|
{
|
|
svr4_sigset_t sss;
|
|
sigset_t bss;
|
|
int error;
|
|
|
|
if ((error = copyin(uap->ss, &sss, sizeof(sss))) != 0)
|
|
return error;
|
|
|
|
svr4_to_bsd_sigset(&sss, &bss);
|
|
return kern_sigsuspend(td, bss);
|
|
}
|
|
|
|
|
|
int
|
|
svr4_sys_kill(td, uap)
|
|
register struct thread *td;
|
|
struct svr4_sys_kill_args *uap;
|
|
{
|
|
struct kill_args ka;
|
|
|
|
if (uap->signum < 0 || uap->signum >= SVR4_NSIG)
|
|
return (EINVAL);
|
|
ka.pid = uap->pid;
|
|
ka.signum = SVR4_SVR42BSD_SIG(uap->signum);
|
|
return kill(td, &ka);
|
|
}
|
|
|
|
|
|
int
|
|
svr4_sys_context(td, uap)
|
|
register struct thread *td;
|
|
struct svr4_sys_context_args *uap;
|
|
{
|
|
struct svr4_ucontext uc;
|
|
int error, onstack;
|
|
|
|
switch (uap->func) {
|
|
case 0:
|
|
DPRINTF(("getcontext(%p)\n", uap->uc));
|
|
PROC_LOCK(td->td_proc);
|
|
onstack = sigonstack(cpu_getstack(td));
|
|
PROC_UNLOCK(td->td_proc);
|
|
svr4_getcontext(td, &uc, &td->td_sigmask, onstack);
|
|
return copyout(&uc, uap->uc, sizeof(uc));
|
|
|
|
case 1:
|
|
DPRINTF(("setcontext(%p)\n", uap->uc));
|
|
if ((error = copyin(uap->uc, &uc, sizeof(uc))) != 0)
|
|
return error;
|
|
DPRINTF(("uc_flags = %lx\n", uc.uc_flags));
|
|
#if defined(DEBUG_SVR4)
|
|
{
|
|
int i;
|
|
for (i = 0; i < 4; i++)
|
|
DPRINTF(("uc_sigmask[%d] = %lx\n", i,
|
|
uc.uc_sigmask.bits[i]));
|
|
}
|
|
#endif
|
|
return svr4_setcontext(td, &uc);
|
|
|
|
default:
|
|
DPRINTF(("context(%d, %p)\n", uap->func,
|
|
uap->uc));
|
|
return ENOSYS;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
svr4_sys_pause(td, uap)
|
|
register struct thread *td;
|
|
struct svr4_sys_pause_args *uap;
|
|
{
|
|
sigset_t mask;
|
|
|
|
PROC_LOCK(td->td_proc);
|
|
mask = td->td_sigmask;
|
|
PROC_UNLOCK(td->td_proc);
|
|
return kern_sigsuspend(td, mask);
|
|
}
|