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opnsense-src/lib/libsys/Makefile.sys
Brooks Davis cdb24fbb0a libsys: Don't create or expose __realpathat 
Previously, __realpathat was in libc and libsys (as is currently
standard), but not exported from libc which meant the stub in libc was
not filtered and thus libc's copy of the syscall was used.  This broke
an upcoming change to CheriBSD limiting syscalls to libsys.

The realpath(3) implementation now uses __sys___realpathat so there are no
consumers of __realpathat.  Switch it to PSEUDO (only _foo and __sys_foo
symbols) and remove __realpathat from Symbol.map.

This is a corrected version of 58d43a3cd7.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D49049
2025-02-19 20:05:47 +00:00

547 lines
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Makefile
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# Implement symbols common to libc and libsys.
#
# When dynamically linked, the libc symbols are filtered by the actual
# implementations in libsys. When statically linked, both libc and
# libsys contain full implementations to preserve the API of libc.a.
#
# The following variable are programmer-defined:
#
# MDASM Override the default syscall implementation in MIASM
# (from syscall.mk below). Each entry is a source file
# name (e.g., vfork.S).
# Generally defined in <arch>/Makefile.sys.
# NOASM Don't generate system call stubs. Each entry is an
# object file name (e.g., yeild.o). Don't add more of these.
# PSEUDO Generate _<sys> and __sys_<sys> symbols, but not <sys>.
# Each entry is a bare syscall name (e.g., "clock_gettime").
# INTERPOSED Like PSEUDO, but <sys>.c is added to SRCS.
# Used for syscalls intercepted by the threading library.
#
.PATH: ${LIBSYS_SRCTOP}/${LIBC_ARCH} ${LIBSYS_SRCTOP}
# Include the generated makefile containing the *complete* list
# of syscall names in MIASM.
.include "${SRCTOP}/sys/sys/syscall.mk"
# Include machine dependent definitions.
.include "${LIBSYS_SRCTOP}/${LIBC_ARCH}/Makefile.sys"
.if ${LIBC_ARCH} == "i386" || ${LIBC_ARCH} == "amd64"
.include "${LIBSYS_SRCTOP}/x86/Makefile.sys"
.endif
SRCS+= clock_gettime.c gettimeofday.c __vdso_gettimeofday.c
# Sources common to both syscall interfaces:
SRCS+= \
__error.c \
__getosreldate.c \
getpagesize.c \
getpagesizes.c \
libsys_sigwait.c
.if ${LIB} == "c"
# Trapping stubs in dynamic libc to be filtered by libsys.
SOBJS+= libc_stubs.pico
# Link the full implementation of ELF auxargs for static libc.
STATICOBJS+= auxv.o
STATICOBJS+= interposing_table.o
.endif
PSEUDO= \
__realpathat \
clock_gettime \
exit \
getlogin \
gettimeofday \
sched_getcpu
INTERPOSED = \
accept \
accept4 \
aio_suspend \
clock_nanosleep \
close \
connect \
fcntl \
fdatasync \
fsync \
fork \
kevent \
msync \
nanosleep \
open \
openat \
pdfork \
poll \
ppoll \
pselect \
ptrace \
read \
readv \
recvfrom \
recvmsg \
select \
sendmsg \
sendto \
setcontext \
sigaction \
sigprocmask \
sigsuspend \
sigtimedwait \
sigwait \
sigwaitinfo \
swapcontext \
wait4 \
wait6 \
write \
writev
PSEUDO+= ${INTERPOSED}
# Add machine dependent asm sources:
SRCS+=${MDASM}
# Look though the complete list of syscalls (MIASM) for names that are
# not defined with machine dependent implementations (MDASM), not declared
# without a trival <sys> symbol (PSEUDO). Add each syscall that satisfies
# these conditions to the ASM list.
.for _asm in ${MIASM}
.if !${MDASM:R:M${_asm:R}} && !${NOASM:R:M${_asm:R}} && !${PSEUDO:M${_asm:R}}
ASM+=$(_asm)
.endif
.endfor
SASM= ${ASM:S/.o/.S/}
SPSEUDO= ${PSEUDO:C/^.*$/_&.S/}
SRCS+= ${SASM} ${SPSEUDO}
SYM_MAPS+= ${LIBSYS_SRCTOP}/syscalls.map
SYM_MAPS+= ${LIBSYS_SRCTOP}/Symbol.sys.map
.if exists(${LIBSYS_SRCTOP}/${LIBC_ARCH}/Symbol.sys.map)
SYM_MAPS+= ${LIBSYS_SRCTOP}/${LIBC_ARCH}/Symbol.sys.map
.endif
# Generated files
CLEANFILES+= ${SASM} ${SPSEUDO}
NOTE_GNU_STACK='\t.section .note.GNU-stack,"",%%progbits\n'
.if ${MACHINE_CPUARCH} == "aarch64"
FEATURE_NOTE='\#include <sys/elf_common.h>\nGNU_PROPERTY_AARCH64_FEATURE_1_NOTE(GNU_PROPERTY_AARCH64_FEATURE_1_VAL)\n'
.else
FEATURE_NOTE=''
.endif
${SASM}:
printf '/* %sgenerated by libc/sys/Makefile.inc */\n' @ > ${.TARGET}
printf '#include "compat.h"\n' >> ${.TARGET}
printf '#include "SYS.h"\nRSYSCALL(${.PREFIX})\n' >> ${.TARGET}
printf ${NOTE_GNU_STACK} >>${.TARGET}
printf ${FEATURE_NOTE} >> ${.TARGET}
${SPSEUDO}:
printf '/* %sgenerated by libc/sys/Makefile.inc */\n' @ > ${.TARGET}
printf '#include "compat.h"\n' >> ${.TARGET}
printf '#include "SYS.h"\nPSEUDO(${.PREFIX:S/_//})\n' \
>> ${.TARGET}
printf ${NOTE_GNU_STACK} >>${.TARGET}
printf ${FEATURE_NOTE} >> ${.TARGET}
.if ${LIB} == "sys"
MAN+= abort2.2 \
accept.2 \
access.2 \
acct.2 \
adjtime.2 \
aio_cancel.2 \
aio_error.2 \
aio_fsync.2 \
aio_mlock.2 \
aio_read.2 \
aio_return.2 \
aio_suspend.2 \
aio_waitcomplete.2 \
aio_write.2 \
auxv.3 \
bind.2 \
bindat.2 \
brk.2 \
cap_enter.2 \
cap_fcntls_limit.2 \
cap_ioctls_limit.2 \
cap_rights_limit.2 \
chdir.2 \
chflags.2 \
chmod.2 \
chown.2 \
chroot.2 \
clock_gettime.2 \
close.2 \
closefrom.2 \
connect.2 \
connectat.2 \
copy_file_range.2 \
cpuset.2 \
cpuset_getaffinity.2 \
cpuset_getdomain.2 \
creat.2 \
dup.2 \
eventfd.2 \
execve.2 \
_exit.2 \
extattr_get_file.2 \
fcntl.2 \
ffclock.2 \
fhlink.2 \
fhopen.2 \
fhreadlink.2 \
flock.2 \
fork.2 \
fspacectl.2 \
fsync.2 \
getdirentries.2 \
getdtablesize.2 \
getfh.2 \
getfsstat.2 \
getgid.2 \
getgroups.2 \
getitimer.2 \
getlogin.2 \
getloginclass.2 \
getpeername.2 \
getpgrp.2 \
getpid.2 \
getpriority.2 \
getrandom.2 \
getrlimit.2 \
getrlimitusage.2 \
getrusage.2 \
getsid.2 \
getsockname.2 \
getsockopt.2 \
gettimeofday.2 \
getuid.2 \
intro.2 \
ioctl.2 \
issetugid.2 \
jail.2 \
kcmp.2 \
kenv.2 \
kill.2 \
kldfind.2 \
kldfirstmod.2 \
kldload.2 \
kldnext.2 \
kldstat.2 \
kldsym.2 \
kldunload.2 \
kqueue.2 \
ktrace.2 \
link.2 \
lio_listio.2 \
listen.2 \
lseek.2 \
madvise.2 \
membarrier.2 \
mincore.2 \
minherit.2 \
mkdir.2 \
mkfifo.2 \
mknod.2 \
mlock.2 \
mlockall.2 \
mmap.2 \
modfind.2 \
modnext.2 \
modstat.2 \
mount.2 \
mprotect.2 \
mq_close.2 \
mq_getattr.2 \
mq_notify.2 \
mq_open.2 \
mq_receive.2 \
mq_send.2 \
mq_setattr.2 \
mq_unlink.2 \
msgctl.2 \
msgget.2 \
msgrcv.2 \
msgsnd.2 \
msync.2 \
munmap.2 \
nanosleep.2 \
nfssvc.2 \
ntp_adjtime.2 \
open.2 \
pathconf.2 \
pdfork.2 \
pipe.2 \
poll.2 \
posix_fadvise.2 \
posix_fallocate.2 \
posix_openpt.2 \
procctl.2 \
profil.2 \
pselect.2 \
ptrace.2 \
quotactl.2 \
rctl_add_rule.2 \
read.2 \
readlink.2 \
reboot.2 \
recv.2 \
rename.2 \
revoke.2 \
rfork.2 \
rmdir.2 \
rtprio.2 \
sched_get_priority_max.2 \
sched_getcpu.3 \
sched_setparam.2 \
sched_setscheduler.2 \
sched_yield.2 \
sctp_generic_recvmsg.2 \
sctp_generic_sendmsg.2 \
sctp_peeloff.2 \
select.2 \
semctl.2 \
semget.2 \
semop.2 \
send.2 \
setcred.2 \
setfib.2 \
sendfile.2 \
setgroups.2 \
setpgid.2 \
setregid.2 \
setresuid.2 \
setreuid.2 \
setsid.2 \
setuid.2 \
shmat.2 \
shmctl.2 \
shmget.2 \
shm_open.2 \
shutdown.2 \
sigaction.2 \
sigaltstack.2 \
sigfastblock.2 \
sigpending.2 \
sigprocmask.2 \
sigqueue.2 \
sigreturn.2 \
sigstack.2 \
sigsuspend.2 \
sigwait.2 \
sigwaitinfo.2 \
socket.2 \
socketpair.2 \
stat.2 \
statfs.2 \
swapon.2 \
symlink.2 \
sync.2 \
sysarch.2 \
syscall.2 \
thr_exit.2 \
thr_kill.2 \
thr_new.2 \
thr_self.2 \
thr_set_name.2 \
thr_suspend.2 \
thr_wake.2 \
timer_create.2 \
timer_delete.2 \
timer_settime.2 \
timerfd.2 \
truncate.2 \
umask.2 \
undelete.2 \
unlink.2 \
utimensat.2 \
utimes.2 \
utrace.2 \
uuidgen.2 \
vfork.2 \
wait.2 \
write.2 \
_umtx_op.2
MAN+= \
getpagesize.3 \
getpagesizes.3 \
lockf.3 \
rfork_thread.3 \
sleep.3 \
usleep.3
MLINKS+=aio_read.2 aio_readv.2 \
aio_read.2 aio_read2.2
MLINKS+=aio_write.2 aio_writev.2 \
aio_write.2 aio_write2.2
MLINKS+=accept.2 accept4.2
MLINKS+=access.2 eaccess.2 \
access.2 faccessat.2
MLINKS+=auxv.3 elf_aux_info.3
MLINKS+=brk.2 sbrk.2
MLINKS+=cap_enter.2 cap_getmode.2
MLINKS+=cap_fcntls_limit.2 cap_fcntls_get.2
MLINKS+=cap_ioctls_limit.2 cap_ioctls_get.2
MLINKS+=chdir.2 fchdir.2
MLINKS+=chflags.2 chflagsat.2 \
chflags.2 fchflags.2 \
chflags.2 lchflags.2
MLINKS+=chmod.2 fchmod.2 \
chmod.2 fchmodat.2 \
chmod.2 lchmod.2
MLINKS+=chown.2 fchown.2 \
chown.2 fchownat.2 \
chown.2 lchown.2
MLINKS+=chroot.2 fchroot.2
MLINKS+=clock_gettime.2 clock_getres.2 \
clock_gettime.2 clock_settime.2
MLINKS+=closefrom.2 close_range.2
MLINKS+=nanosleep.2 clock_nanosleep.2
MLINKS+=cpuset.2 cpuset_getid.2 \
cpuset.2 cpuset_setid.2
MLINKS+=cpuset_getaffinity.2 cpuset_setaffinity.2
MLINKS+=cpuset_getdomain.2 cpuset_setdomain.2
MLINKS+=dup.2 dup2.2
MLINKS+=eventfd.2 eventfd_read.3 \
eventfd.2 eventfd_write.3
MLINKS+=execve.2 fexecve.2
MLINKS+=extattr_get_file.2 extattr.2 \
extattr_get_file.2 extattr_delete_fd.2 \
extattr_get_file.2 extattr_delete_file.2 \
extattr_get_file.2 extattr_delete_link.2 \
extattr_get_file.2 extattr_get_fd.2 \
extattr_get_file.2 extattr_get_link.2 \
extattr_get_file.2 extattr_list_fd.2 \
extattr_get_file.2 extattr_list_file.2 \
extattr_get_file.2 extattr_list_link.2 \
extattr_get_file.2 extattr_set_fd.2 \
extattr_get_file.2 extattr_set_file.2 \
extattr_get_file.2 extattr_set_link.2
MLINKS+=ffclock.2 ffclock_getcounter.2 \
ffclock.2 ffclock_getestimate.2 \
ffclock.2 ffclock_setestimate.2
MLINKS+=fhlink.2 fhlinkat.2
MLINKS+=fhopen.2 fhstat.2 fhopen.2 fhstatfs.2
MLINKS+=fork.2 _Fork.2
MLINKS+=fsync.2 fdatasync.2
MLINKS+=getdirentries.2 getdents.2
MLINKS+=getfh.2 lgetfh.2 \
getfh.2 getfhat.2
MLINKS+=getgid.2 getegid.2
MLINKS+=getitimer.2 setitimer.2
MLINKS+=getlogin.2 getlogin_r.3
MLINKS+=getlogin.2 setlogin.2
MLINKS+=getloginclass.2 setloginclass.2
MLINKS+=getpgrp.2 getpgid.2
MLINKS+=getpid.2 getppid.2
MLINKS+=getpriority.2 setpriority.2
MLINKS+=getrlimit.2 setrlimit.2
MLINKS+=getsockopt.2 setsockopt.2
MLINKS+=gettimeofday.2 settimeofday.2
MLINKS+=getuid.2 geteuid.2
MLINKS+=intro.2 errno.2
MLINKS+=jail.2 jail_attach.2 \
jail.2 jail_get.2 \
jail.2 jail_remove.2 \
jail.2 jail_set.2
MLINKS+=kldunload.2 kldunloadf.2
MLINKS+=kqueue.2 kevent.2 \
kqueue.2 kqueue1.2 \
kqueue.2 kqueuex.2 \
kqueue.2 EV_SET.3
MLINKS+=link.2 linkat.2
MLINKS+=madvise.2 posix_madvise.2
MLINKS+=mkdir.2 mkdirat.2
MLINKS+=mkfifo.2 mkfifoat.2
MLINKS+=mknod.2 mknodat.2
MLINKS+=mlock.2 munlock.2
MLINKS+=mlockall.2 munlockall.2
MLINKS+=modnext.2 modfnext.2
MLINKS+=mount.2 nmount.2 \
mount.2 unmount.2
MLINKS+=mq_receive.2 mq_timedreceive.2
MLINKS+=mq_send.2 mq_timedsend.2
MLINKS+=ntp_adjtime.2 ntp_gettime.2
MLINKS+=open.2 openat.2
MLINKS+=pathconf.2 fpathconf.2
MLINKS+=pathconf.2 lpathconf.2
MLINKS+=pdfork.2 pdgetpid.2\
pdfork.2 pdkill.2
MLINKS+=pipe.2 pipe2.2
MLINKS+=poll.2 ppoll.2
MLINKS+=rctl_add_rule.2 rctl_get_limits.2 \
rctl_add_rule.2 rctl_get_racct.2 \
rctl_add_rule.2 rctl_get_rules.2 \
rctl_add_rule.2 rctl_remove_rule.2
MLINKS+=read.2 pread.2 \
read.2 preadv.2 \
read.2 readv.2
MLINKS+=readlink.2 readlinkat.2
MLINKS+=recv.2 recvfrom.2 \
recv.2 recvmmsg.2 \
recv.2 recvmsg.2
MLINKS+=rename.2 renameat.2
MLINKS+=rtprio.2 rtprio_thread.2
MLINKS+=sched_get_priority_max.2 sched_get_priority_min.2 \
sched_get_priority_max.2 sched_rr_get_interval.2
MLINKS+=sched_setparam.2 sched_getparam.2
MLINKS+=sched_setscheduler.2 sched_getscheduler.2
MLINKS+=sctp_generic_sendmsg.2 sctp_generic_sendmsg_iov.2
MLINKS+=select.2 FD_CLR.3 \
select.2 FD_ISSET.3 \
select.2 FD_SET.3 \
select.2 FD_ZERO.3
MLINKS+=send.2 sendmmsg.2 \
send.2 sendmsg.2 \
send.2 sendto.2
MLINKS+=setpgid.2 setpgrp.2
MLINKS+=setresuid.2 getresgid.2 \
setresuid.2 getresuid.2 \
setresuid.2 setresgid.2
MLINKS+=setuid.2 setegid.2 \
setuid.2 seteuid.2 \
setuid.2 setgid.2
MLINKS+=shmat.2 shmdt.2
MLINKS+=shm_open.2 memfd_create.3 \
shm_open.2 shm_create_largepage.3 \
shm_open.2 shm_unlink.2 \
shm_open.2 shm_rename.2
MLINKS+=sigwaitinfo.2 sigtimedwait.2
MLINKS+=stat.2 fstat.2 \
stat.2 fstatat.2 \
stat.2 lstat.2
MLINKS+=statfs.2 fstatfs.2
MLINKS+=swapon.2 swapoff.2
MLINKS+=symlink.2 symlinkat.2
MLINKS+=syscall.2 __syscall.2
MLINKS+=timer_settime.2 timer_getoverrun.2 \
timer_settime.2 timer_gettime.2
MLINKS+=timerfd.2 timerfd_create.2 \
timerfd.2 timerfd_gettime.2 \
timerfd.2 timerfd_settime.2
MLINKS+=thr_kill.2 thr_kill2.2
MLINKS+=truncate.2 ftruncate.2
MLINKS+=unlink.2 unlinkat.2
MLINKS+=unlink.2 funlinkat.2
MLINKS+=utimensat.2 futimens.2
MLINKS+=utimes.2 futimes.2 \
utimes.2 futimesat.2 \
utimes.2 lutimes.2
MLINKS+=wait.2 wait3.2 \
wait.2 wait4.2 \
wait.2 waitpid.2 \
wait.2 waitid.2 \
wait.2 wait6.2
MLINKS+=write.2 pwrite.2 \
write.2 pwritev.2 \
write.2 writev.2
.endif # ${LIB} == "sys"
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