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freebsd-src/lib/libsys/Makefile.sys
Brooks Davis d7847a8d35 lib{c,sys}: return wrapped syscall APIs to libc 
These provide standard APIs, but are implemented using another system
call (e.g., pipe implemented in terms of pipe2) or are interposed by the
threading library to support cancelation.

After discussion with kib (see D44111), I've concluded that it is
better to keep most public interfaces in libc with as little
as possible in libsys.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D44241
2024-03-13 18:36:02 +00:00

545 lines
12 KiB
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 \
interposing_table.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
.endif
NOASM= yield.o
PSEUDO= \
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}
.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386" || \
${MACHINE_CPUARCH} == "powerpc" || ${MACHINE_CPUARCH} == "arm"
NOTE_GNU_STACK='\t.section .note.GNU-stack,"",%%progbits\n'
.else
NOTE_GNU_STACK=''
.endif
.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 \
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 \
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_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 \
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+=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 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 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 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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