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📄 Make.tags.inc(2.13 KB)
📄 Makefile(302 B)
📄 bus_if.m(26.31 KB)
📄 capabilities.conf(13.67 KB)
📄 clock_if.m(1.7 KB)
📄 cpufreq_if.m(2.27 KB)
📄 device_if.m(10.41 KB)
📄 firmw.S(2.15 KB)
📄 genassym.sh(1.11 KB)
📄 genoffset.c(1.68 KB)
📄 genoffset.sh(3.58 KB)
📄 imgact_aout.c(9.45 KB)
📄 imgact_binmisc.c(18.64 KB)
📄 imgact_elf.c(76.32 KB)
📄 imgact_elf32.c(1.47 KB)
📄 imgact_elf64.c(1.47 KB)
📄 imgact_shell.c(8.41 KB)
📄 init_main.c(24.31 KB)
📄 init_sysent.c(95.3 KB)
📄 kern_acct.c(19.03 KB)
📄 kern_alq.c(24.97 KB)
📄 kern_clock.c(21.12 KB)
📄 kern_clocksource.c(23.34 KB)
📄 kern_condvar.c(11.28 KB)
📄 kern_conf.c(36.14 KB)
📄 kern_cons.c(15.75 KB)
📄 kern_context.c(3.59 KB)
📄 kern_cpu.c(30.77 KB)
📄 kern_cpuset.c(59.78 KB)
📄 kern_ctf.c(8.73 KB)
📄 kern_descrip.c(112.87 KB)
📄 kern_dtrace.c(2.94 KB)
📄 kern_dump.c(8.51 KB)
📄 kern_environment.c(22.75 KB)
📄 kern_et.c(7.1 KB)
📄 kern_event.c(62.49 KB)
📄 kern_exec.c(46.67 KB)
📄 kern_exit.c(34.61 KB)
📄 kern_fail.c(29.32 KB)
📄 kern_ffclock.c(12.66 KB)
📄 kern_fork.c(28.29 KB)
📄 kern_hhook.c(13.58 KB)
📄 kern_idle.c(2.74 KB)
📄 kern_intr.c(40.44 KB)
📄 kern_jail.c(112.67 KB)
📄 kern_kcov.c(15.32 KB)
📄 kern_khelp.c(9.45 KB)
📄 kern_kthread.c(11.8 KB)
📄 kern_ktr.c(11.93 KB)
📄 kern_ktrace.c(31.41 KB)
📄 kern_linker.c(54.3 KB)
📄 kern_lock.c(46.99 KB)
📄 kern_lockf.c(64.46 KB)
📄 kern_lockstat.c(3.8 KB)
📄 kern_loginclass.c(6.69 KB)
📄 kern_malloc.c(37.09 KB)
📄 kern_mbuf.c(43.16 KB)
📄 kern_mib.c(24.26 KB)
📄 kern_module.c(11.05 KB)
📄 kern_mtxpool.c(5.82 KB)
📄 kern_mutex.c(33.62 KB)
📄 kern_ntptime.c(32.49 KB)
📄 kern_osd.c(12.37 KB)
📄 kern_physio.c(5.74 KB)
📄 kern_pmc.c(8.89 KB)
📄 kern_poll.c(15.86 KB)
📄 kern_priv.c(9.14 KB)
📄 kern_proc.c(80.01 KB)
📄 kern_procctl.c(19.48 KB)
📄 kern_prot.c(57.94 KB)
📄 kern_racct.c(34.01 KB)
📄 kern_rangelock.c(8.67 KB)
📄 kern_rctl.c(53.87 KB)
📄 kern_resource.c(36.66 KB)
📄 kern_rmlock.c(28.27 KB)
📄 kern_rwlock.c(40.72 KB)
📄 kern_sdt.c(2.05 KB)
📄 kern_sema.c(4.85 KB)
📄 kern_sendfile.c(33.97 KB)
📄 kern_sharedpage.c(10.37 KB)
📄 kern_shutdown.c(43.34 KB)
📄 kern_sig.c(101.89 KB)
📄 kern_switch.c(13.85 KB)
📄 kern_sx.c(40.27 KB)
📄 kern_synch.c(18.17 KB)
📄 kern_syscalls.c(6.74 KB)
📄 kern_sysctl.c(67.24 KB)
📄 kern_tc.c(55.73 KB)
📄 kern_thr.c(14.14 KB)
📄 kern_thread.c(41.75 KB)
📄 kern_time.c(40.89 KB)
📄 kern_timeout.c(43.08 KB)
📄 kern_tslog.c(3.44 KB)
📄 kern_ubsan.c(50.74 KB)
📄 kern_umtx.c(107.14 KB)
📄 kern_uuid.c(11.68 KB)
📄 kern_xxx.c(10.44 KB)
📄 ksched.c(6.56 KB)
📄 link_elf.c(47.99 KB)
📄 link_elf_obj.c(44.41 KB)
📄 linker_if.m(3.96 KB)
📄 makesyscalls.sh(23.57 KB)
📄 md4c.c(7.89 KB)
📄 md5c.c(9.56 KB)
📄 msi_if.m(2.48 KB)
📄 p1003_1b.c(8.84 KB)
📄 pic_if.m(3.9 KB)
📄 posix4_mib.c(5.59 KB)
📄 sched_4bsd.c(45.03 KB)
📄 sched_ule.c(82.65 KB)
📄 serdev_if.m(3.49 KB)
📄 stack_protector.c(613 B)
📄 subr_acl_nfs4.c(37.42 KB)
📄 subr_acl_posix1e.c(17.71 KB)
📄 subr_atomic64.c(3.97 KB)
📄 subr_autoconf.c(7.7 KB)
📄 subr_blist.c(31.88 KB)
📄 subr_boot.c(5.8 KB)
📄 subr_bufring.c(2.21 KB)
📄 subr_bus.c(145.4 KB)
📄 subr_bus_dma.c(19.67 KB)
📄 subr_busdma_bufalloc.c(5.24 KB)
📄 subr_capability.c(11.93 KB)
📄 subr_clock.c(10.61 KB)
📄 subr_compressor.c(13.11 KB)
📄 subr_counter.c(4.44 KB)
📄 subr_coverage.c(6.17 KB)
📄 subr_csan.c(25.39 KB)
📄 subr_devmap.c(9.8 KB)
📄 subr_devstat.c(16.21 KB)
📄 subr_disk.c(8.54 KB)
📄 subr_dummy_vdso_tc.c(1.7 KB)
📄 subr_early.c(2.26 KB)
📄 subr_epoch.c(25.02 KB)
📄 subr_eventhandler.c(9.17 KB)
📄 subr_fattime.c(9.98 KB)
📄 subr_filter.c(12.2 KB)
📄 subr_firmware.c(13.88 KB)
📄 subr_gtaskqueue.c(20.19 KB)
📄 subr_hash.c(4.8 KB)
📄 subr_hints.c(12.87 KB)
📄 subr_intr.c(40.61 KB)
📄 subr_kdb.c(16.13 KB)
📄 subr_kobj.c(7.1 KB)
📄 subr_lock.c(18.81 KB)
📄 subr_log.c(7.64 KB)
📄 subr_mchain.c(11.06 KB)
📄 subr_module.c(12.98 KB)
📄 subr_msgbuf.c(10.6 KB)
📄 subr_param.c(10.93 KB)
📄 subr_pcpu.c(10.18 KB)
📄 subr_pctrie.c(20.99 KB)
📄 subr_physmem.c(11.52 KB)
📄 subr_pidctrl.c(5.43 KB)
📄 subr_power.c(3.13 KB)
📄 subr_prf.c(27.42 KB)
📄 subr_prng.c(3.36 KB)
📄 subr_prof.c(15.43 KB)
📄 subr_rangeset.c(8.5 KB)
📄 subr_rman.c(27.61 KB)
📄 subr_rtc.c(11.42 KB)
📄 subr_sbuf.c(20.53 KB)
📄 subr_scanf.c(15.59 KB)
📄 subr_sfbuf.c(6.17 KB)
📄 subr_sglist.c(22.83 KB)
📄 subr_sleepqueue.c(39.43 KB)
📄 subr_smp.c(31.62 KB)
📄 subr_smr.c(20.17 KB)
📄 subr_stack.c(6.47 KB)
📄 subr_stats.c(103.01 KB)
📄 subr_syscall.c(7.98 KB)
📄 subr_taskqueue.c(21.1 KB)
📄 subr_terminal.c(15.52 KB)
📄 subr_trap.c(10.87 KB)
📄 subr_turnstile.c(35.58 KB)
📄 subr_uio.c(11.38 KB)
📄 subr_unit.c(22.97 KB)
📄 subr_vmem.c(43.25 KB)
📄 subr_witness.c(84.59 KB)
📄 sys_capability.c(15.06 KB)
📄 sys_eventfd.c(8.42 KB)
📄 sys_generic.c(44.22 KB)
📄 sys_getrandom.c(4.21 KB)
📄 sys_pipe.c(45.14 KB)
📄 sys_procdesc.c(14.57 KB)
📄 sys_process.c(30.73 KB)
📄 sys_socket.c(20.11 KB)
📄 syscalls.c(22.73 KB)
📄 syscalls.master(60.26 KB)
📄 systrace_args.c(178.49 KB)
📄 sysv_ipc.c(6.53 KB)
📄 sysv_msg.c(48.65 KB)
📄 sysv_sem.c(49.85 KB)
📄 sysv_shm.c(43.93 KB)
📄 tty.c(55.14 KB)
📄 tty_compat.c(11.46 KB)
📄 tty_info.c(9.93 KB)
📄 tty_inq.c(12.22 KB)
📄 tty_outq.c(8.74 KB)
📄 tty_pts.c(19.74 KB)
📄 tty_tty.c(2.83 KB)
📄 tty_ttydisc.c(28.6 KB)
📄 uipc_accf.c(8.07 KB)
📄 uipc_debug.c(12.42 KB)
📄 uipc_domain.c(13.13 KB)
📄 uipc_ktls.c(55.7 KB)
📄 uipc_mbuf.c(52.45 KB)
📄 uipc_mbuf2.c(12.64 KB)
📄 uipc_mbufhash.c(4.9 KB)
📄 uipc_mqueue.c(64.64 KB)
📄 uipc_sem.c(25.18 KB)
📄 uipc_shm.c(50.47 KB)
📄 uipc_sockbuf.c(42.9 KB)
📄 uipc_socket.c(110.61 KB)
📄 uipc_syscalls.c(35.94 KB)
📄 uipc_usrreq.c(75.11 KB)
📄 vfs_acl.c(14.5 KB)
📄 vfs_aio.c(76.32 KB)
📄 vfs_bio.c(145.39 KB)
📄 vfs_cache.c(143.09 KB)
📄 vfs_cluster.c(28.36 KB)
📄 vfs_default.c(33.16 KB)
📄 vfs_export.c(14.55 KB)
📄 vfs_extattr.c(17.91 KB)
📄 vfs_hash.c(6 KB)
📄 vfs_init.c(15.86 KB)
📄 vfs_lookup.c(45.48 KB)
📄 vfs_mount.c(62.58 KB)
📄 vfs_mountroot.c(26.23 KB)
📄 vfs_subr.c(167.52 KB)
📄 vfs_syscalls.c(106.86 KB)
📄 vfs_vnops.c(86.28 KB)
📄 vnode_if.src(13.66 KB)

Editing: subr_syscall.c

/*-
 * SPDX-License-Identifier: BSD-4-Clause
 *
 * Copyright (C) 1994, David Greenman
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 * Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org>
 *
 * This code is derived from software contributed to Berkeley by
 * the University of Utah, and William Jolitz.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	from: @(#)trap.c	7.4 (Berkeley) 5/13/91
 */

#include "opt_capsicum.h"
#include "opt_ktrace.h"

__FBSDID("$FreeBSD$");

#include <sys/capsicum.h>
#include <sys/ktr.h>
#include <sys/vmmeter.h>
#ifdef KTRACE
#include <sys/uio.h>
#include <sys/ktrace.h>
#endif
#include <security/audit/audit.h>

static inline void
syscallenter(struct thread *td)
{
	struct proc *p;
	struct syscall_args *sa;
	struct sysent *se;
	int error, traced;
	bool sy_thr_static;

VM_CNT_INC(v_syscall);
	p = td->td_proc;
	sa = &td->td_sa;

td->td_pticks = 0;
	if (__predict_false(td->td_cowgen != p->p_cowgen))
		thread_cow_update(td);
	traced = (p->p_flag & P_TRACED) != 0;
	if (__predict_false(traced || td->td_dbgflags & TDB_USERWR)) {
		PROC_LOCK(p);
		td->td_dbgflags &= ~TDB_USERWR;
		if (traced)
			td->td_dbgflags |= TDB_SCE;
		PROC_UNLOCK(p);
	}
	error = (p->p_sysent->sv_fetch_syscall_args)(td);
	se = sa->callp;
#ifdef KTRACE
	if (KTRPOINT(td, KTR_SYSCALL))
		ktrsyscall(sa->code, se->sy_narg, sa->args);
#endif
	KTR_START4(KTR_SYSC, "syscall", syscallname(p, sa->code),
	    (uintptr_t)td, "pid:%d", td->td_proc->p_pid, "arg0:%p", sa->args[0],
	    "arg1:%p", sa->args[1], "arg2:%p", sa->args[2]);

if (__predict_false(error != 0)) {
		td->td_errno = error;
		goto retval;
	}

if (__predict_false(traced)) {
		PROC_LOCK(p);
		if (p->p_ptevents & PTRACE_SCE)
			ptracestop((td), SIGTRAP, NULL);
		PROC_UNLOCK(p);

if ((td->td_dbgflags & TDB_USERWR) != 0) {
			/*
			 * Reread syscall number and arguments if debugger
			 * modified registers or memory.
			 */
			error = (p->p_sysent->sv_fetch_syscall_args)(td);
			se = sa->callp;
#ifdef KTRACE
			if (KTRPOINT(td, KTR_SYSCALL))
				ktrsyscall(sa->code, se->sy_narg, sa->args);
#endif
			if (error != 0) {
				td->td_errno = error;
				goto retval;
			}
		}
	}

#ifdef CAPABILITY_MODE
	/*
	 * In capability mode, we only allow access to system calls
	 * flagged with SYF_CAPENABLED.
	 */
	if (__predict_false(IN_CAPABILITY_MODE(td) &&
	    (se->sy_flags & SYF_CAPENABLED) == 0)) {
		td->td_errno = error = ECAPMODE;
		goto retval;
	}
#endif

/*
	 * Fetch fast sigblock value at the time of syscall entry to
	 * handle sleepqueue primitives which might call cursig().
	 */
	if (__predict_false(sigfastblock_fetch_always))
		(void)sigfastblock_fetch(td);

/* Let system calls set td_errno directly. */
	KASSERT((td->td_pflags & TDP_NERRNO) == 0,
	    ("%s: TDP_NERRNO set", __func__));

sy_thr_static = (se->sy_thrcnt & SY_THR_STATIC) != 0;

if (__predict_false(SYSTRACE_ENABLED() ||
	    AUDIT_SYSCALL_ENTER(sa->code, td) ||
	    !sy_thr_static)) {
		if (!sy_thr_static) {
			error = syscall_thread_enter(td, se);
			if (error != 0) {
				td->td_errno = error;
				goto retval;
			}
		}

#ifdef KDTRACE_HOOKS
		/* Give the syscall:::entry DTrace probe a chance to fire. */
		if (__predict_false(se->sy_entry != 0))
			(*systrace_probe_func)(sa, SYSTRACE_ENTRY, 0);
#endif
		error = (se->sy_call)(td, sa->args);
		/* Save the latest error return value. */
		if (__predict_false((td->td_pflags & TDP_NERRNO) != 0))
			td->td_pflags &= ~TDP_NERRNO;
		else
			td->td_errno = error;

/*
		 * Note that some syscall implementations (e.g., sys_execve)
		 * will commit the audit record just before their final return.
		 * These were done under the assumption that nothing of interest
		 * would happen between their return and here, where we would
		 * normally commit the audit record.  These assumptions will
		 * need to be revisited should any substantial logic be added
		 * above.
		 */
		AUDIT_SYSCALL_EXIT(error, td);

#ifdef KDTRACE_HOOKS
		/* Give the syscall:::return DTrace probe a chance to fire. */
		if (__predict_false(se->sy_return != 0))
			(*systrace_probe_func)(sa, SYSTRACE_RETURN,
			    error ? -1 : td->td_retval[0]);
#endif

if (!sy_thr_static)
			syscall_thread_exit(td, se);
	} else {
		error = (se->sy_call)(td, sa->args);
		/* Save the latest error return value. */
		if (__predict_false((td->td_pflags & TDP_NERRNO) != 0))
			td->td_pflags &= ~TDP_NERRNO;
		else
			td->td_errno = error;
	}

retval:
	KTR_STOP4(KTR_SYSC, "syscall", syscallname(p, sa->code),
	    (uintptr_t)td, "pid:%d", td->td_proc->p_pid, "error:%d", error,
	    "retval0:%#lx", td->td_retval[0], "retval1:%#lx",
	    td->td_retval[1]);
	if (__predict_false(traced)) {
		PROC_LOCK(p);
		td->td_dbgflags &= ~TDB_SCE;
		PROC_UNLOCK(p);
	}
	(p->p_sysent->sv_set_syscall_retval)(td, error);
}

static inline void
syscallret(struct thread *td)
{
	struct proc *p;
	struct syscall_args *sa;
	ksiginfo_t ksi;
	int traced;

KASSERT((td->td_pflags & TDP_FORKING) == 0,
	    ("fork() did not clear TDP_FORKING upon completion"));
	KASSERT(td->td_errno != ERELOOKUP,
	    ("ERELOOKUP not consumed syscall %d", td->td_sa.code));

p = td->td_proc;
	sa = &td->td_sa;
	if (__predict_false(td->td_errno == ENOTCAPABLE ||
	    td->td_errno == ECAPMODE)) {
		if ((trap_enotcap ||
		    (p->p_flag2 & P2_TRAPCAP) != 0) && IN_CAPABILITY_MODE(td)) {
			ksiginfo_init_trap(&ksi);
			ksi.ksi_signo = SIGTRAP;
			ksi.ksi_errno = td->td_errno;
			ksi.ksi_code = TRAP_CAP;
			trapsignal(td, &ksi);
		}
	}

/*
	 * Handle reschedule and other end-of-syscall issues
	 */
	userret(td, td->td_frame);

#ifdef KTRACE
	if (KTRPOINT(td, KTR_SYSRET)) {
		ktrsysret(sa->code, td->td_errno, td->td_retval[0]);
	}
#endif

traced = 0;
	if (__predict_false(p->p_flag & P_TRACED)) {
		traced = 1;
		PROC_LOCK(p);
		td->td_dbgflags |= TDB_SCX;
		PROC_UNLOCK(p);
	}
	if (__predict_false(traced ||
	    (td->td_dbgflags & (TDB_EXEC | TDB_FORK)) != 0)) {
		PROC_LOCK(p);
		/*
		 * If tracing the execed process, trap to the debugger
		 * so that breakpoints can be set before the program
		 * executes.  If debugger requested tracing of syscall
		 * returns, do it now too.
		 */
		if (traced &&
		    ((td->td_dbgflags & (TDB_FORK | TDB_EXEC)) != 0 ||
		    (p->p_ptevents & PTRACE_SCX) != 0))
			ptracestop(td, SIGTRAP, NULL);
		td->td_dbgflags &= ~(TDB_SCX | TDB_EXEC | TDB_FORK);
		PROC_UNLOCK(p);
	}

if (__predict_false(td->td_pflags & TDP_RFPPWAIT))
		fork_rfppwait(td);
}

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Editing: subr_syscall.c

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