Support TLS for MIPS.

rust/src/bin/tls.rs

@@ -7,6 +7,9 @@ extern crate rcore_user;
 
 use rcore_user::syscall::{sys_arch_prctl, sys_getpid, sys_sleep, sys_vfork};
 
+#[cfg(target_arch = "mips")]
+use rcore_user::syscall::sys_set_theaad_area;
+
 fn set_tls(tls: usize, pid: usize) {
     #[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))]
     unsafe {
@@ -23,6 +26,8 @@ fn set_tls(tls: usize, pid: usize) {
         // set fs base
         sys_arch_prctl(0x1002, &DATA[pid] as *const usize as usize);
     }
+    #[cfg(target_arch = "mips")]
+    sys_set_theaad_area(tls);
 }
 
 fn get_tls() -> usize {
@@ -39,6 +44,10 @@ fn get_tls() -> usize {
     unsafe {
         asm!("mov %fs:0, $0" : "=r"(tls) :);
     }
+    #[cfg(target_arch = "mips")]
+    unsafe {
+        asm!("rdhwr $0, $$29" : "=r"(tls) :);
+    }
     tls
 }
 

rust/src/syscall.rs

@@ -325,6 +325,11 @@ enum SyscallId {
     GetPaddr = 998,
 }
 
+#[cfg(target_arch = "mips")]
+pub fn sys_set_theaad_area(tls: usize) {
+    sys_call(SyscallId::SetThreadArea, tls, 0, 0, 0, 0, 0);
+}
+
 // only for mips N32 abi
 // see https://git.linux-mips.org/cgit/ralf/linux.git/tree/arch/mips/include/uapi/asm/unistd.h
 #[cfg(target_arch = "mips")]
@@ -354,6 +359,7 @@ enum SyscallId {
     Chdir = 4012,
     GetTime = 4078,
     SetPriority = 4097,
+    SetThreadArea = 4283,
     ArchPrctl = -1,
     GetDirEntry64 = 4219,
     Openat = 4288,
@@ -364,7 +370,7 @@ enum SyscallId {
     GetPaddr = 998,
 }
 
-#[cfg(any(all(target_arch = "x86_64", target_arch = "mips")))]
+#[cfg(not(any(target_arch = "x86_64", target_arch = "mips")))]
 #[allow(dead_code)]
 enum SyscallId {
     Read = 63,