Detect MIPS32 R6

Author: chenx97

Cargo.toml

@@ -35,7 +35,7 @@ once_cell = { version = "1.5.2", optional = true }
 # addition to the libc backend. The linux_raw backend is used by default. The
 # libc backend can be selected via adding `--cfg=rustix_use_libc` to
 # `RUSTFLAGS` or enabling the `use-libc` cargo feature.
-[target.'cfg(all(not(rustix_use_libc), not(miri), target_os = "linux", target_endian = "little", any(target_arch = "arm", all(target_arch = "aarch64", target_pointer_width = "64"), target_arch = "riscv64", all(rustix_use_experimental_asm, target_arch = "powerpc64"), all(rustix_use_experimental_asm, target_arch = "mips"), all(rustix_use_experimental_asm, target_arch = "mips64"), all(rustix_use_experimental_asm, target_arch = "mips64r6"), target_arch = "x86", all(target_arch = "x86_64", target_pointer_width = "64"))))'.dependencies]
+[target.'cfg(all(not(rustix_use_libc), not(miri), target_os = "linux", target_endian = "little", any(target_arch = "arm", all(target_arch = "aarch64", target_pointer_width = "64"), target_arch = "riscv64", all(rustix_use_experimental_asm, target_arch = "powerpc64"), all(rustix_use_experimental_asm, target_arch = "mips"), all(rustix_use_experimental_asm, target_arch = "mips32r6"), all(rustix_use_experimental_asm, target_arch = "mips64"), all(rustix_use_experimental_asm, target_arch = "mips64r6"), target_arch = "x86", all(target_arch = "x86_64", target_pointer_width = "64"))))'.dependencies]
 linux-raw-sys = { version = "0.4.3", default-features = false, features = ["general", "errno", "ioctl", "no_std"] }
 libc_errno = { package = "errno", version = "0.3.1", default-features = false, optional = true }
 libc = { version = "0.2.147", features = ["extra_traits"], optional = true }
@@ -44,15 +44,15 @@ libc = { version = "0.2.147", features = ["extra_traits"], optional = true }
 #
 # On all other Unix-family platforms, and under Miri, we always use the libc
 # backend, so enable its dependencies unconditionally.
-[target.'cfg(all(not(windows), any(rustix_use_libc, miri, not(all(target_os = "linux", target_endian = "little", any(target_arch = "arm", all(target_arch = "aarch64", target_pointer_width = "64"), target_arch = "riscv64", all(rustix_use_experimental_asm, target_arch = "powerpc64"), all(rustix_use_experimental_asm, target_arch = "mips"), all(rustix_use_experimental_asm, target_arch = "mips64"), all(rustix_use_experimental_asm, target_arch = "mips64r6"), target_arch = "x86", all(target_arch = "x86_64", target_pointer_width = "64")))))))'.dependencies]
+[target.'cfg(all(not(windows), any(rustix_use_libc, miri, not(all(target_os = "linux", target_endian = "little", any(target_arch = "arm", all(target_arch = "aarch64", target_pointer_width = "64"), target_arch = "riscv64", all(rustix_use_experimental_asm, target_arch = "powerpc64"), all(rustix_use_experimental_asm, target_arch = "mips"), all(rustix_use_experimental_asm, target_arch = "mips32r6"), all(rustix_use_experimental_asm, target_arch = "mips64"), all(rustix_use_experimental_asm, target_arch = "mips64r6"), target_arch = "x86", all(target_arch = "x86_64", target_pointer_width = "64")))))))'.dependencies]
 libc_errno = { package = "errno", version = "0.3.1", default-features = false }
 libc = { version = "0.2.147", features = ["extra_traits"] }
 
 # Additional dependencies for Linux with the libc backend:
 #
 # Some syscalls do not have libc wrappers, such as in `io_uring`. For these,
 # the libc backend uses the linux-raw-sys ABI and `libc::syscall`.
-[target.'cfg(all(any(target_os = "android", target_os = "linux"), any(rustix_use_libc, miri, not(all(target_os = "linux", target_endian = "little", any(target_arch = "arm", all(target_arch = "aarch64", target_pointer_width = "64"), target_arch = "riscv64", all(rustix_use_experimental_asm, target_arch = "powerpc64"), all(rustix_use_experimental_asm, target_arch = "mips"), all(rustix_use_experimental_asm, target_arch = "mips64"), all(rustix_use_experimental_asm, target_arch = "mips64r6"), target_arch = "x86", all(target_arch = "x86_64", target_pointer_width = "64")))))))'.dependencies]
+[target.'cfg(all(any(target_os = "android", target_os = "linux"), any(rustix_use_libc, miri, not(all(target_os = "linux", target_endian = "little", any(target_arch = "arm", all(target_arch = "aarch64", target_pointer_width = "64"), target_arch = "riscv64", all(rustix_use_experimental_asm, target_arch = "powerpc64"), all(rustix_use_experimental_asm, target_arch = "mips"), all(rustix_use_experimental_asm, target_arch = "mips32r6"), all(rustix_use_experimental_asm, target_arch = "mips64"), all(rustix_use_experimental_asm, target_arch = "mips64r6"), target_arch = "x86", all(target_arch = "x86_64", target_pointer_width = "64")))))))'.dependencies]
 linux-raw-sys = { version = "0.4.3", default-features = false, features = ["general", "ioctl", "no_std"] }
 
 # For the libc backend on Windows, use the Winsock2 API in windows-sys.

src/backend/libc/c.rs

@@ -62,6 +62,7 @@ pub(crate) const ETH_P_MCTP: c_int = linux_raw_sys::if_ether::ETH_P_MCTP as _;
     linux_kernel,
     any(
         target_arch = "mips",
+        target_arch = "mips32r6",
         target_arch = "mips64",
         target_arch = "mips64r6",
         target_arch = "sparc",

src/backend/libc/mm/types.rs

@@ -201,7 +201,7 @@ bitflags! {
             target_os = "redox",
             all(
                 linux_kernel,
-                any(target_arch = "mips", target_arch = "mips64", target_arch = "mips64r6"),
+                any(target_arch = "mips", target_arch = "mips32r6", target_arch = "mips64", target_arch = "mips64r6"),
             )
         )))]
         const SYNC = bitcast!(c::MAP_SYNC);
@@ -335,7 +335,12 @@ pub enum Advice {
     /// `MADV_SOFT_OFFLINE`
     #[cfg(all(
         linux_kernel,
-        not(any(target_arch = "mips", target_arch = "mips64", target_arch = "mips64r6"))
+        not(any(
+            target_arch = "mips",
+            target_arch = "mips32r6",
+            target_arch = "mips64",
+            target_arch = "mips64r6"
+        ))
     ))]
     LinuxSoftOffline = bitcast!(c::MADV_SOFT_OFFLINE),
     /// `MADV_MERGEABLE`

src/backend/libc/termios/syscalls.rs

@@ -117,6 +117,7 @@ pub(crate) fn tcsetattr(
         let request = TCSETS2
             + if cfg!(any(
                 target_arch = "mips",
+                target_arch = "mips32r6",
                 target_arch = "mips64",
                 target_arch = "mips64r6"
             )) {