# specifically the Debian libsys-syscall-perl 0.25-6 version to
# fix upstream regressions in 0.25.
#
+# See devel/syscall-list in the public-inbox source tree for maintenance
+# <https://80x24.org/public-inbox.git>, and machines from the GCC Farm:
+# <https://cfarm.tetaneutral.net/>
+#
# This license differs from the rest of public-inbox
#
# This module is Copyright (c) 2005 Six Apart, Ltd.
use strict;
use v5.10.1;
use parent qw(Exporter);
-use POSIX qw(ENOENT EEXIST ENOSYS EINVAL O_NONBLOCK);
+use POSIX qw(ENOENT ENOSYS EINVAL O_NONBLOCK);
+use Socket qw(SOL_SOCKET SCM_RIGHTS);
use Config;
# $VERSION = '0.25'; # Sys::Syscall version
EPOLL_CTL_ADD => 1,
EPOLL_CTL_DEL => 2,
EPOLL_CTL_MOD => 3,
+ SIZEOF_int => $Config{intsize},
+ SIZEOF_size_t => $Config{sizesize},
+ NUL => "\0",
+};
+
+use constant {
+ TMPL_size_t => SIZEOF_size_t == 8 ? 'Q' : 'L',
+ BYTES_4_hole => SIZEOF_size_t == 8 ? 'L' : '',
+ # cmsg_len, cmsg_level, cmsg_type
+ SIZEOF_cmsghdr => SIZEOF_int * 2 + SIZEOF_size_t,
};
+my @BYTES_4_hole = BYTES_4_hole ? (0) : ();
our $loaded_syscall = 0;
sub _load_syscall {
$SYS_renameat2,
);
+my ($SYS_sendmsg, $SYS_recvmsg);
my $SYS_fstatfs; # don't need fstatfs64, just statfs.f_type
my ($FS_IOC_GETFLAGS, $FS_IOC_SETFLAGS);
my $SFD_CLOEXEC = 02000000; # Perl does not expose O_CLOEXEC
$SYS_signalfd4 = 327;
$SYS_renameat2 //= 353;
$SYS_fstatfs = 100;
+ $SYS_sendmsg = 370;
+ $SYS_recvmsg = 372;
$FS_IOC_GETFLAGS = 0x80046601;
$FS_IOC_SETFLAGS = 0x40046602;
} elsif ($machine eq "x86_64") {
$SYS_signalfd4 = 289;
$SYS_renameat2 //= 316;
$SYS_fstatfs = 138;
+ $SYS_sendmsg = 46;
+ $SYS_recvmsg = 47;
$FS_IOC_GETFLAGS = 0x80086601;
$FS_IOC_SETFLAGS = 0x40086602;
} elsif ($machine eq 'x32') {
$SYS_signalfd4 = 1073742113;
$SYS_renameat2 //= 0x40000000 + 316;
$SYS_fstatfs = 138;
+ $SYS_sendmsg = 0x40000206;
+ $SYS_recvmsg = 0x40000207;
$FS_IOC_GETFLAGS = 0x80046601;
$FS_IOC_SETFLAGS = 0x40046602;
} elsif ($machine eq 'sparc64') {
$SYS_renameat2 //= 345;
$SFD_CLOEXEC = 020000000;
$SYS_fstatfs = 158;
+ $SYS_sendmsg = 114;
+ $SYS_recvmsg = 113;
$FS_IOC_GETFLAGS = 0x40086601;
$FS_IOC_SETFLAGS = 0x80086602;
} elsif ($machine =~ m/^parisc/) {
$SYS_signalfd4 = 313;
$SYS_renameat2 //= 357;
$SYS_fstatfs = 100;
+ $SYS_sendmsg = 341;
+ $SYS_recvmsg = 342;
$FS_IOC_GETFLAGS = 0x40086601;
$FS_IOC_SETFLAGS = 0x80086602;
} elsif ($machine eq "ppc") {
$SYS_fstatfs = 100;
$FS_IOC_GETFLAGS = 0x40086601;
$FS_IOC_SETFLAGS = 0x80086602;
- } elsif ($machine =~ m/^s390/) {
+ } elsif ($machine =~ m/^s390/) { # untested, no machine on cfarm
$SYS_epoll_create = 249;
$SYS_epoll_ctl = 250;
$SYS_epoll_wait = 251;
$SYS_signalfd4 = 322;
$SYS_renameat2 //= 347;
$SYS_fstatfs = 100;
- } elsif ($machine eq "ia64") {
+ $SYS_sendmsg = 370;
+ $SYS_recvmsg = 372;
+ } elsif ($machine eq 'ia64') { # untested, no machine on cfarm
$SYS_epoll_create = 1243;
$SYS_epoll_ctl = 1244;
$SYS_epoll_wait = 1245;
$u64_mod_8 = 1;
$SYS_signalfd4 = 289;
- } elsif ($machine eq "alpha") {
+ } elsif ($machine eq "alpha") { # untested, no machine on cfarm
# natural alignment, ints are 32-bits
$SYS_epoll_create = 407;
$SYS_epoll_ctl = 408;
$u64_mod_8 = 1;
$SYS_signalfd4 = 484;
$SFD_CLOEXEC = 010000000;
- } elsif ($machine eq "aarch64") {
+ } elsif ($machine eq 'aarch64' || $machine eq 'loongarch64') {
$SYS_epoll_create = 20; # (sys_epoll_create1)
$SYS_epoll_ctl = 21;
$SYS_epoll_wait = 22; # (sys_epoll_pwait)
$SYS_signalfd4 = 74;
$SYS_renameat2 //= 276;
$SYS_fstatfs = 44;
+ $SYS_sendmsg = 211;
+ $SYS_recvmsg = 212;
$FS_IOC_GETFLAGS = 0x80086601;
$FS_IOC_SETFLAGS = 0x40086602;
- } elsif ($machine =~ m/arm(v\d+)?.*l/) {
- # ARM OABI
+ } elsif ($machine =~ m/arm(v\d+)?.*l/) { # ARM OABI (untested on cfarm)
$SYS_epoll_create = 250;
$SYS_epoll_ctl = 251;
$SYS_epoll_wait = 252;
$SYS_signalfd4 = 355;
$SYS_renameat2 //= 382;
$SYS_fstatfs = 100;
- } elsif ($machine =~ m/^mips64/) {
+ $SYS_sendmsg = 296;
+ $SYS_recvmsg = 297;
+ } elsif ($machine =~ m/^mips64/) { # cfarm only has 32-bit userspace
$SYS_epoll_create = 5207;
$SYS_epoll_ctl = 5208;
$SYS_epoll_wait = 5209;
$SYS_signalfd4 = 5283;
$SYS_renameat2 //= 5311;
$SYS_fstatfs = 5135;
+ $SYS_sendmsg = 5045;
+ $SYS_recvmsg = 5046;
$FS_IOC_GETFLAGS = 0x40046601;
$FS_IOC_SETFLAGS = 0x80046602;
- } elsif ($machine =~ m/^mips/) {
+ } elsif ($machine =~ m/^mips/) { # 32-bit, tested on mips64 cfarm machine
$SYS_epoll_create = 4248;
$SYS_epoll_ctl = 4249;
$SYS_epoll_wait = 4250;
$SYS_signalfd4 = 4324;
$SYS_renameat2 //= 4351;
$SYS_fstatfs = 4100;
+ $SYS_sendmsg = 4179;
+ $SYS_recvmsg = 4177;
$FS_IOC_GETFLAGS = 0x40046601;
$FS_IOC_SETFLAGS = 0x80046602;
} else {
if (open my $fh, '<', $_[0]) { nodatacow_fh($fh) }
}
+sub CMSG_ALIGN ($) { ($_[0] + SIZEOF_size_t - 1) & ~(SIZEOF_size_t - 1) }
+use constant CMSG_ALIGN_SIZEOF_cmsghdr => CMSG_ALIGN(SIZEOF_cmsghdr);
+sub CMSG_SPACE ($) { CMSG_ALIGN($_[0]) + CMSG_ALIGN_SIZEOF_cmsghdr }
+sub CMSG_LEN ($) { CMSG_ALIGN_SIZEOF_cmsghdr + $_[0] }
+
+if (defined($SYS_sendmsg) && defined($SYS_recvmsg)) {
+no warnings 'once';
+*send_cmd4 = sub ($$$$) {
+ my ($sock, $fds, undef, $flags) = @_;
+ my $iov = pack('P'.TMPL_size_t,
+ $_[2] // NUL, length($_[2] // NUL) || 1);
+ my $cmsghdr = pack(TMPL_size_t . # cmsg_len
+ 'LL' . # cmsg_level, cmsg_type,
+ ('i' x scalar(@$fds)),
+ CMSG_LEN(scalar(@$fds) * SIZEOF_int), # cmsg_len
+ SOL_SOCKET, SCM_RIGHTS, # cmsg_{level,type}
+ @$fds); # CMSG_DATA
+ my $mh = pack('PL' . # msg_name, msg_namelen (socklen_t (U32))
+ BYTES_4_hole . # 4-byte padding on 64-bit
+ 'P'.TMPL_size_t . # msg_iov, msg_iovlen,
+ 'P'.TMPL_size_t . # msg_control, msg_controllen,
+ 'i', # msg_flags
+ NUL, 0, # msg_name, msg_namelen (unused)
+ @BYTES_4_hole,
+ $iov, 1, # msg_iov, msg_iovlen
+ $cmsghdr, # msg_control
+ CMSG_SPACE(scalar(@$fds) * SIZEOF_int), # msg_controllen
+ 0); # msg_flags
+ my $sent;
+ my $try = 0;
+ do {
+ $sent = syscall($SYS_sendmsg, fileno($sock), $mh, $flags);
+ } while ($sent < 0 &&
+ ($!{ENOBUFS} || $!{ENOMEM} || $!{ETOOMANYREFS}) &&
+ (++$try < 50) &&
+ warn "sleeping on sendmsg: $! (#$try)\n" &&
+ select(undef, undef, undef, 0.1) == 0);
+ $sent >= 0 ? $sent : undef;
+};
+
+*recv_cmd4 = sub ($$$) {
+ my ($sock, undef, $len) = @_;
+ vec($_[1], ($len + 1) * 8, 1) = 0;
+ vec(my $cmsghdr = '', 256 * 8 - 1, 1) = 1;
+ my $iov = pack('P'.TMPL_size_t, $_[1], $len);
+ my $mh = pack('PL' . # msg_name, msg_namelen (socklen_t (U32))
+ BYTES_4_hole . # 4-byte padding on 64-bit
+ 'P'.TMPL_size_t . # msg_iov, msg_iovlen,
+ 'P'.TMPL_size_t . # msg_control, msg_controllen,
+ 'i', # msg_flags
+ NUL, 0, # msg_name, msg_namelen (unused)
+ @BYTES_4_hole,
+ $iov, 1, # msg_iov, msg_iovlen
+ $cmsghdr, # msg_control
+ 256, # msg_controllen
+ 0); # msg_flags
+ my $r = syscall($SYS_recvmsg, fileno($sock), $mh, 0);
+ return (undef) if $r < 0; # $! set
+ substr($_[1], $r, length($_[1]), '');
+ my @ret;
+ if ($r > 0) {
+ my ($len, $lvl, $type, @fds) = unpack(TMPL_size_t . # cmsg_len
+ 'LLi*', # cmsg_level, cmsg_type, @fds
+ $cmsghdr);
+ if ($lvl == SOL_SOCKET && $type == SCM_RIGHTS) {
+ $len -= CMSG_ALIGN_SIZEOF_cmsghdr;
+ @ret = @fds[0..(($len / SIZEOF_int) - 1)];
+ }
+ }
+ @ret;
+};
+}
+
1;
=head1 WARRANTY