diff --git a/openmp/runtime/src/z_Linux_asm.S b/openmp/runtime/src/z_Linux_asm.S
--- a/openmp/runtime/src/z_Linux_asm.S
+++ b/openmp/runtime/src/z_Linux_asm.S
@@ -108,7 +108,7 @@
 # endif // KMP_OS_DARWIN
 #endif // KMP_ARCH_X86 || KMP_ARCH_x86_64
 
-#if (KMP_OS_LINUX || KMP_OS_DARWIN || KMP_OS_WINDOWS) && KMP_ARCH_AARCH64
+#if (KMP_OS_LINUX || KMP_OS_DARWIN || KMP_OS_WINDOWS) && (KMP_ARCH_AARCH64 || KMP_ARCH_ARM)
 
 # if KMP_OS_DARWIN
 #  define KMP_PREFIX_UNDERSCORE(x) _##x  // extra underscore for OS X* symbols
@@ -160,7 +160,11 @@
 	.cfi_endproc
 // Not sure why we need .type and .size for the functions
 	ALIGN 2
+#if KMP_ARCH_ARM
+	.type  \proc,%function
+#else
 	.type  \proc,@function
+#endif
 	.size  \proc,.-\proc
 .endm
 
@@ -172,7 +176,7 @@
 .endm
 # endif // KMP_OS_DARWIN
 
-#endif // (KMP_OS_LINUX || KMP_OS_DARWIN || KMP_OS_WINDOWS) && KMP_ARCH_AARCH64
+#endif // (KMP_OS_LINUX || KMP_OS_DARWIN || KMP_OS_WINDOWS) && (KMP_ARCH_AARCH64 || KMP_ARCH_ARM)
 
 #if KMP_OS_DARWIN
 .macro COMMON name, size, align_power
@@ -1362,6 +1366,136 @@
 
 #endif /* (KMP_OS_LINUX || KMP_OS_DARWIN || KMP_OS_WINDOWS) && KMP_ARCH_AARCH64 */
 
+#if (KMP_OS_LINUX || KMP_OS_DARWIN || KMP_OS_WINDOWS) && KMP_ARCH_ARM
+
+//------------------------------------------------------------------------
+// int
+// __kmp_invoke_microtask( void (*pkfn) (int gtid, int tid, ...),
+//                         int gtid, int tid,
+//                         int argc, void *p_argv[]
+// #if OMPT_SUPPORT
+//                         ,
+//                         void **exit_frame_ptr
+// #endif
+//                       ) {
+// #if OMPT_SUPPORT
+//   *exit_frame_ptr = OMPT_GET_FRAME_ADDRESS(0);
+// #endif
+//
+//   (*pkfn)( & gtid, & tid, argv[0], ... );
+//
+// // FIXME: This is done at call-site and can be removed here.
+// #if OMPT_SUPPORT
+//   *exit_frame_ptr = 0;
+// #endif
+//
+//   return 1;
+// }
+//
+// parameters:
+//	r0:	pkfn
+//	r1:	gtid
+//	r2:	tid
+//	r3:	argc
+//	r4(stack):	p_argv
+//	r5(stack):	&exit_frame
+//
+// locals:
+//	__gtid:	gtid parm pushed on stack so can pass &gtid to pkfn
+//	__tid:	tid parm pushed on stack so can pass &tid to pkfn
+//
+// reg temps:
+//	 r4:	used to hold pkfn address
+//	 r5:	used as temporary for number of pkfn parms
+//	 r6:	used to traverse p_argv array
+//	 r7:	frame pointer (in some configurations)
+//	 r8:	used as temporary for stack placement calculation
+//	 	and as pointer to base of callee saved area
+//	 r9:	used as temporary for stack parameters
+//	r10:	used to preserve exit_frame_ptr, callee-save
+//	r11:	frame pointer (in some configurations)
+//
+// return:	r0	(always 1/TRUE)
+//
+
+__gtid = 4
+__tid = 8
+
+// -- Begin __kmp_invoke_microtask
+// mark_begin;
+	.text
+	PROC __kmp_invoke_microtask
+
+	// Pushing one extra register to keep the stack aligned
+	push	{r3-r11,lr}
+	ldrd    r4, r5, [sp, #10*4]
+
+# if KMP_OS_DARWIN || (defined(__thumb__) && !KMP_OS_WINDOWS)
+# define FP r7
+	add	r7, sp, #4*4
+#else
+# define FP r11
+	add	r11, sp, #8*4
+#endif
+# if OMPT_SUPPORT
+	mov	r10, r5
+	str	FP, [r10]
+# endif
+# undef FP
+	mov	r8, sp
+
+	mov	r5, #1
+	// Increment r3 to round upwards
+	add	r3, r3, #1
+	add	r5, r5, r3, lsr #1
+	sub	sp, sp, r5, lsl #3
+	sub	r3, r3, #1
+
+	str	r1, [r8, #-__gtid]
+	str	r2, [r8, #-__tid]
+	mov	r5, r3
+	mov	r6, r4
+	mov	r4, r0
+
+	sub	r0, r8, #__gtid
+	sub	r1, r8, #__tid
+
+	mov	r8, sp
+
+	cmp	r5, #0
+	beq	KMP_LABEL(kmp_1)
+	ldr	r2, [r6]
+
+	subs	r5, r5, #1
+	beq	KMP_LABEL(kmp_1)
+	ldr	r3, [r6, #4]!
+
+KMP_LABEL(kmp_0):
+	subs	r5, r5, #1
+	beq	KMP_LABEL(kmp_1)
+	ldr	r12, [r6, #4]!
+	str	r12, [r8], #4
+	b	KMP_LABEL(kmp_0)
+KMP_LABEL(kmp_1):
+	blx	r4
+	mov	r0, #1
+# if KMP_OS_DARWIN || (defined(__thumb__) && !KMP_OS_WINDOWS)
+	sub	r4, r7, #4*4
+#else
+	sub	r4, r11, #8*4
+#endif
+	mov	sp, r4
+# if OMPT_SUPPORT
+	mov	r1, #0
+	str	r1, [r10]
+# endif
+	pop	{r3-r11,pc}
+
+	DEBUG_INFO __kmp_invoke_microtask
+// -- End  __kmp_invoke_microtask
+
+#endif /* (KMP_OS_LINUX || KMP_OS_DARWIN || KMP_OS_WINDOWS) && KMP_ARCH_AARCH64 */
+
 #if KMP_ARCH_PPC64
 
 //------------------------------------------------------------------------
@@ -1923,7 +2057,9 @@
     .global __kmp_unnamed_critical_addr
 __kmp_unnamed_critical_addr:
     .4byte .gomp_critical_user_
+#ifdef __ELF__
     .size __kmp_unnamed_critical_addr,4
+#endif
 #endif /* KMP_ARCH_ARM */
 
 #if KMP_ARCH_PPC64 || KMP_ARCH_AARCH64 || KMP_ARCH_MIPS64 || KMP_ARCH_RISCV64 || KMP_ARCH_LOONGARCH64
diff --git a/openmp/runtime/src/z_Linux_util.cpp b/openmp/runtime/src/z_Linux_util.cpp
--- a/openmp/runtime/src/z_Linux_util.cpp
+++ b/openmp/runtime/src/z_Linux_util.cpp
@@ -2442,7 +2442,8 @@
 
 #if !(KMP_ARCH_X86 || KMP_ARCH_X86_64 || KMP_MIC ||                            \
       ((KMP_OS_LINUX || KMP_OS_DARWIN) && KMP_ARCH_AARCH64) ||                 \
-      KMP_ARCH_PPC64 || KMP_ARCH_RISCV64 || KMP_ARCH_LOONGARCH64)
+      KMP_ARCH_PPC64 || KMP_ARCH_RISCV64 || KMP_ARCH_LOONGARCH64 ||            \
+      KMP_ARCH_ARM)
 
 // we really only need the case with 1 argument, because CLANG always build
 // a struct of pointers to shared variables referenced in the outlined function