ci: add support for loongarch64-unknown-linux-musl

.github/workflows/full_ci.yml

@@ -165,6 +165,7 @@ jobs:
           - i686-linux-android
           - i686-unknown-linux-musl
           - loongarch64-unknown-linux-gnu
+          - loongarch64-unknown-linux-musl
           - powerpc-unknown-linux-gnu
           - powerpc64-unknown-linux-gnu
           - powerpc64le-unknown-linux-gnu

ci/docker/loongarch64-unknown-linux-musl/Dockerfile

@@ -0,0 +1,14 @@
+FROM ubuntu:24.04
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        ca-certificates curl gcc git libc6-dev make qemu-user xz-utils
+
+COPY install-musl-cross.sh /
+RUN sh /install-musl-cross.sh loongarch64-unknown-linux-musl
+
+ENV CARGO_TARGET_LOONGARCH64_UNKNOWN_LINUX_MUSL_LINKER=loongarch64-unknown-linux-musl-gcc \
+    CARGO_TARGET_LOONGARCH64_UNKNOWN_LINUX_MUSL_RUNNER="qemu-loongarch64" \
+    CC_loongarch64_unknown_linux_musl=loongarch64-unknown-linux-musl-gcc \
+    CFLAGS_loongarch64_unknown_linux_musl="-mabi=lp64d -fPIC" \
+    QEMU_LD_PREFIX=/loongarch64-unknown-linux-musl/loongarch64-unknown-linux-musl/sysroot \
+    PATH=$PATH:/loongarch64-unknown-linux-musl/bin:/rust/bin

ci/install-musl-cross.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+#
+# Install musl cross toolchain
+
+set -ex
+
+MUSL_CROSS_VER=20241103
+MUSL_CROSS_URL=https://github.com/musl-cross/musl-cross/releases/download/$MUSL_CROSS_VER/$1.tar.xz
+
+curl -L --retry 5 "$MUSL_CROSS_URL" | tar -xJf - -C /

libc-test/build.rs

@@ -4489,14 +4489,14 @@ fn test_linux(target: &str) {
         (struct_ == "iw_encode_ext" && field == "key") ||
         // the `tcpi_snd_rcv_wscale` map two bitfield fields stored in a u8
         (struct_ == "tcp_info" && field == "tcpi_snd_rcv_wscale") ||
-        // the `tcpi_delivery_rate_app_limited` field is a bitfield on musl
-        (musl && struct_ == "tcp_info" && field == "tcpi_delivery_rate_app_limited") ||
-        // the `tcpi_fast_open_client_fail` field is a bitfield on musl
-        (musl && struct_ == "tcp_info" && field == "tcpi_fast_open_client_fail") ||
+        // the `tcpi_delivery_fastopen_bitfields` map two bitfield fields stored in a u8
+        (musl && struct_ == "tcp_info" && field == "tcpi_delivery_fastopen_bitfields") ||
         // either fsid_t or int[2] type
         (struct_ == "fanotify_event_info_fid" && field == "fsid") ||
         // `handle` is a VLA
-        (struct_ == "fanotify_event_info_fid" && field == "handle")
+        (struct_ == "fanotify_event_info_fid" && field == "handle") ||
+        // invalid application of 'sizeof' to incomplete type 'long unsigned int[]'
+        (musl && struct_ == "mcontext_t" && field == "__extcontext" && loongarch64)
     });
 
     cfg.skip_roundtrip(move |s| match s {

libc-test/semver/linux-gnu-loongarch64.txt

@@ -1,6 +1,21 @@
+KEYCTL_CAPABILITIES
+KEYCTL_CAPS0_BIG_KEY
+KEYCTL_CAPS0_CAPABILITIES
+KEYCTL_CAPS0_DIFFIE_HELLMAN
+KEYCTL_CAPS0_INVALIDATE
+KEYCTL_CAPS0_MOVE
+KEYCTL_CAPS0_PERSISTENT_KEYRINGS
+KEYCTL_CAPS0_PUBLIC_KEY
+KEYCTL_CAPS0_RESTRICT_KEYRING
+KEYCTL_CAPS1_NS_KEYRING_NAME
+KEYCTL_CAPS1_NS_KEY_TAG
+KEYCTL_MOVE
+MADV_SOFT_OFFLINE
 PTRACE_GETFPREGS
 PTRACE_GETFPXREGS
 PTRACE_GETREGS
 PTRACE_SETFPREGS
 PTRACE_SETFPXREGS
 PTRACE_SETREGS
+PTRACE_SYSEMU
+PTRACE_SYSEMU_SINGLESTEP

libc-test/semver/linux-loongarch64.txt

@@ -40,26 +40,11 @@ BPF_XOR
 CIBAUD
 FICLONE
 FICLONERANGE
-KEYCTL_CAPABILITIES
-KEYCTL_CAPS0_BIG_KEY
-KEYCTL_CAPS0_CAPABILITIES
-KEYCTL_CAPS0_DIFFIE_HELLMAN
-KEYCTL_CAPS0_INVALIDATE
-KEYCTL_CAPS0_MOVE
-KEYCTL_CAPS0_PERSISTENT_KEYRINGS
-KEYCTL_CAPS0_PUBLIC_KEY
-KEYCTL_CAPS0_RESTRICT_KEYRING
-KEYCTL_CAPS1_NS_KEYRING_NAME
-KEYCTL_CAPS1_NS_KEY_TAG
-KEYCTL_MOVE
-MADV_SOFT_OFFLINE
 MAP_SYNC
 NFT_MSG_DELOBJ
 NFT_MSG_GETOBJ
 NFT_MSG_GETOBJ_RESET
 NFT_MSG_NEWOBJ
-PTRACE_SYSEMU
-PTRACE_SYSEMU_SINGLESTEP
 SCM_TIMESTAMPNS
 SCM_WIFI_STATUS
 SIGSTKFLT

src/unix/linux_like/linux/arch/generic/mod.rs

@@ -353,7 +353,10 @@ cfg_if! {
         pub const RLIMIT_RTPRIO: ::c_int = 14;
         pub const RLIMIT_RTTIME: ::c_int = 15;
         #[deprecated(since = "0.2.64", note = "Not stable across OS versions")]
+        #[cfg(not(target_arch = "loongarch64"))]
         pub const RLIM_NLIMITS: ::c_int = 15;
+        #[cfg(target_arch = "loongarch64")]
+        pub const RLIM_NLIMITS: ::c_int = 16;
         #[allow(deprecated)]
         #[deprecated(since = "0.2.64", note = "Not stable across OS versions")]
         pub const RLIMIT_NLIMITS: ::c_int = RLIM_NLIMITS;

src/unix/linux_like/linux/musl/b64/loongarch64/mod.rs

@@ -11,10 +11,6 @@ pub type __u64 = ::c_ulonglong;
 pub type __s64 = ::c_longlong;
 
 s! {
-    pub struct pthread_attr_t {
-        __size: [::c_ulong; 7],
-    }
-
     pub struct stat {
         pub st_dev: ::dev_t,
         pub st_ino: ::ino_t,
@@ -59,21 +55,6 @@ s! {
         __unused: [::c_int; 2],
     }
 
-    pub struct statfs {
-        pub f_type: ::c_long,
-        pub f_bsize: ::c_long,
-        pub f_blocks: ::fsblkcnt_t,
-        pub f_bfree: ::fsblkcnt_t,
-        pub f_bavail: ::fsblkcnt_t,
-        pub f_files: ::fsfilcnt_t,
-        pub f_ffree: ::fsfilcnt_t,
-        pub f_fsid: ::fsid_t,
-        pub f_namelen: ::c_long,
-        pub f_frsize: ::c_long,
-        pub f_flags: ::c_long,
-        pub f_spare: [::c_long; 4],
-    }
-
     pub struct statfs64 {
         pub f_type: ::c_long,
         pub f_bsize: ::c_long,
@@ -96,7 +77,7 @@ s! {
         pub cuid: ::uid_t,
         pub cgid: ::gid_t,
         pub mode: ::c_uint,
-        pub __seq: ::c_ushort,
+        pub __seq: ::c_int,
         __pad2: ::c_ushort,
         __unused1: ::c_ulong,
         __unused2: ::c_ulong,
@@ -126,10 +107,10 @@ s! {
 
     #[repr(align(16))]
     pub struct mcontext_t {
-        pub __pc: ::c_ulonglong,
-        pub __gregs: [::c_ulonglong; 32],
+        pub __pc: ::c_ulong,
+        pub __gregs: [::c_ulong; 32],
         pub __flags: ::c_uint,
-        pub __extcontext: [::c_ulonglong; 0],
+        pub __extcontext: [::c_ulong; 0],
     }
 
     #[repr(align(8))]
@@ -467,7 +448,7 @@ pub const SYS_futex_requeue: ::c_long = 456;
 pub const O_APPEND: ::c_int = 1024;
 pub const O_DIRECT: ::c_int = 0x4000;
 pub const O_DIRECTORY: ::c_int = 0x10000;
-pub const O_LARGEFILE: ::c_int = 0;
+pub const O_LARGEFILE: ::c_int = 0o0100000;
 pub const O_NOFOLLOW: ::c_int = 0x20000;
 pub const O_CREAT: ::c_int = 64;
 pub const O_EXCL: ::c_int = 128;
@@ -476,7 +457,7 @@ pub const O_NONBLOCK: ::c_int = 2048;
 pub const O_SYNC: ::c_int = 1052672;
 pub const O_RSYNC: ::c_int = 1052672;
 pub const O_DSYNC: ::c_int = 4096;
-pub const O_ASYNC: ::c_int = 4096;
+pub const O_ASYNC: ::c_int = 0o20000;
 
 pub const SIGSTKSZ: ::size_t = 16384;
 pub const MINSIGSTKSZ: ::size_t = 4096;
@@ -660,6 +641,7 @@ pub const ECHOPRT: ::tcflag_t = 0x00000400;
 pub const ECHOCTL: ::tcflag_t = 0x00000200;
 pub const ISIG: ::tcflag_t = 0x00000001;
 pub const ICANON: ::tcflag_t = 0x00000002;
+pub const XCASE: ::tcflag_t = 0x00000004;
 pub const PENDIN: ::tcflag_t = 0x00004000;
 pub const NOFLSH: ::tcflag_t = 0x00000080;
 pub const CIBAUD: ::tcflag_t = 0o02003600000;

src/unix/linux_like/linux/musl/mod.rs

@@ -355,14 +355,16 @@ s! {
         pub tcpi_backoff: u8,
         pub tcpi_options: u8,
         /*
-         * FIXME(musl): when musl headers are more up to date
+         * FIXME(musl): enable on all targets once musl headers are more up to date
+         */
         /// This contains the bitfields `tcpi_snd_wscale` and `tcpi_rcv_wscale`.
         /// Each is 4 bits.
+        #[cfg(target_arch = "loongarch64")]
         pub tcpi_snd_rcv_wscale: u8,
         /// This contains the bitfields `tcpi_delivery_rate_app_limited` (1 bit) and
         /// `tcpi_fastopen_client_fail` (2 bits).
+        #[cfg(target_arch = "loongarch64")]
         pub tcpi_delivery_fastopen_bitfields: u8,
-        */
         pub tcpi_rto: u32,
         pub tcpi_ato: u32,
         pub tcpi_snd_mss: u32,
@@ -407,9 +409,11 @@ s! {
         pub tcpi_bytes_retrans: u64,
         pub tcpi_dsack_dups: u32,
         pub tcpi_reord_seen: u32,
-        // FIXME(musl): to uncomment once CI musl is updated
-        //pub tcpi_rcv_ooopack: u32,
-        //pub tcpi_snd_wnd: u32,
+        // FIXME(musl): enable on all targets once CI musl is updated
+        #[cfg(target_arch = "loongarch64")]
+        pub tcpi_rcv_ooopack: u32,
+        #[cfg(target_arch = "loongarch64")]
+        pub tcpi_snd_wnd: u32,
     }
 }
 
@@ -449,8 +453,17 @@ s_no_extra_traits! {
         pub ut_exit: __exit_status,
 
         #[cfg(target_env = "musl")]
+        #[cfg(not(target_arch = "loongarch64"))]
         pub ut_session: ::c_long,
 
+        #[cfg(target_env = "musl")]
+        #[cfg(target_arch = "loongarch64")]
+        pub ut_session: ::c_int,
+
+        #[cfg(target_env = "musl")]
+        #[cfg(target_arch = "loongarch64")]
+        __ut_pad2: ::c_int,
+
         #[cfg(target_env = "ohos")]
         #[cfg(target_endian = "little")]
         pub ut_session: ::c_int,
@@ -712,7 +725,10 @@ pub const __SIZEOF_PTHREAD_MUTEXATTR_T: usize = 4;
 pub const __SIZEOF_PTHREAD_RWLOCKATTR_T: usize = 8;
 pub const __SIZEOF_PTHREAD_BARRIERATTR_T: usize = 4;
 
+#[cfg(not(target_arch = "loongarch64"))]
 pub const CPU_SETSIZE: ::c_int = 128;
+#[cfg(target_arch = "loongarch64")]
+pub const CPU_SETSIZE: ::c_int = 1024;
 
 pub const PTRACE_TRACEME: ::c_int = 0;
 pub const PTRACE_PEEKTEXT: ::c_int = 1;