diff --git a/bfd/elfnn-aarch64.c b/bfd/elfnn-aarch64.c
index 55bf288a754..08d1141d4dd 100644
--- a/bfd/elfnn-aarch64.c
+++ b/bfd/elfnn-aarch64.c
@@ -8139,6 +8139,14 @@ elfNN_aarch64_relocate_section (bfd *output_bfd,
 	     input_section, (uint64_t) rel->r_offset, howto->name, name);
 	}
 
+      if (r_symndx
+	  && h
+	  && IS_AARCH64_TLS_RELOC (bfd_r_type)
+	  && h->root.type == bfd_link_hash_undefweak)
+	/* We have already warned about these in aarch64_check_relocs,
+	   so just skip over them.  */
+	continue;
+
       /* We relax only if we can see that there can be a valid transition
 	 from a reloc type to another.
 	 We call elfNN_aarch64_final_link_relocate unless we're completely
@@ -8947,11 +8955,13 @@ elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
   for (rel = relocs; rel < rel_end; rel++)
     {
       struct elf_link_hash_entry *h;
-      unsigned int r_symndx;
+      unsigned int r_symndx, r_type;
       bfd_reloc_code_real_type bfd_r_type;
       Elf_Internal_Sym *isym;
 
       r_symndx = ELFNN_R_SYM (rel->r_info);
+      r_type = ELFNN_R_TYPE (rel->r_info);
+      bfd_r_type = elfNN_aarch64_bfd_reloc_from_type (abfd, r_type);
 
       if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
 	{
@@ -8994,6 +9004,26 @@ elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
 	    h = (struct elf_link_hash_entry *) h->root.u.i.link;
 	}
 
+      /* Ignore TLS relocations against weak undef symbols and warn about them.
+	 The behaviour of weak TLS variables is not well defined. Since making
+	 these well behaved is not a priority for Morello, we simply ignore
+	 TLS relocations against such symbols here to avoid the linker crashing
+	 on these and to enable making progress in other areas.  */
+      if (r_symndx
+	  && h
+	  && IS_AARCH64_TLS_RELOC (bfd_r_type)
+	  && h->root.type == bfd_link_hash_undefweak)
+	{
+	  int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
+	  _bfd_error_handler (_("%pB(%pA+%#" PRIx64 "): ignoring TLS relocation "
+				"%s against undef weak symbol %s"),
+			      abfd, sec,
+			      (uint64_t) rel->r_offset,
+			      elfNN_aarch64_howto_table[howto_index].name,
+			      h->root.root.string);
+	  continue;
+	}
+
       /* Could be done earlier, if h were already available.  */
       bfd_r_type = aarch64_tls_transition (abfd, info, rel, h, r_symndx);
 
diff --git a/ld/testsuite/ld-aarch64/aarch64-elf.exp b/ld/testsuite/ld-aarch64/aarch64-elf.exp
index 228cfe224c5..893c869f1a3 100644
--- a/ld/testsuite/ld-aarch64/aarch64-elf.exp
+++ b/ld/testsuite/ld-aarch64/aarch64-elf.exp
@@ -457,4 +457,5 @@ run_dump_test "bti-pac-plt-2"
 
 run_dump_test "bti-warn"
 run_dump_test "weak-tls"
+run_dump_test "morello-weak-tls"
 run_dump_test "undef-tls"
diff --git a/ld/testsuite/ld-aarch64/morello-weak-tls.d b/ld/testsuite/ld-aarch64/morello-weak-tls.d
new file mode 100644
index 00000000000..20f5cb1b889
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/morello-weak-tls.d
@@ -0,0 +1,6 @@
+#source: morello-weak-tls.s
+#ld:
+#warning:.*: ignoring TLS relocation R_MORELLO_TLSDESC_ADR_PAGE20 against undef weak symbol x
+#warning:.*: ignoring TLS relocation R_MORELLO_TLSDESC_LD128_LO12 against undef weak symbol x
+#warning:.*: ignoring TLS relocation R_AARCH64_TLSDESC_ADD_LO12 against undef weak symbol x
+#warning:.*: ignoring TLS relocation R_MORELLO_TLSDESC_CALL against undef weak symbol x
diff --git a/ld/testsuite/ld-aarch64/morello-weak-tls.s b/ld/testsuite/ld-aarch64/morello-weak-tls.s
new file mode 100644
index 00000000000..a40d84b8546
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/morello-weak-tls.s
@@ -0,0 +1,36 @@
+	.arch morello+crc+c64
+	.file	"t.c"
+	.text
+	.align	2
+	.global	_start
+	.type	_start, %function
+_start:
+.LFB0:
+	.cfi_startproc
+	stp	c29, c30, [csp, -32]!
+	.cfi_def_cfa_offset 32
+	.cfi_offset 29, -32
+	.cfi_offset 30, -16
+	mov	c29, csp
+	mrs	c2, ctpidr_el0
+	nop
+	adrp	c0, :tlsdesc:x
+	ldr	c1, [c0, #:tlsdesc_lo12:x]
+	add	c0, c0, :tlsdesc_lo12:x
+	.tlsdesccall	x
+	blr	c1
+	scbnds	c0, c0, x1
+	mov	w1, 1
+	str	w1, [c0]
+	nop
+	ldp	c29, c30, [csp], 32
+	.cfi_restore 30
+	.cfi_restore 29
+	.cfi_def_cfa_offset 0
+	ret
+	.cfi_endproc
+.LFE0:
+	.size	_start, .-_start
+	.weak	x
+	.ident	"GCC: (GNU) 11.0.0 20200826 (experimental)"
+	.section	.note.GNU-stack,"",@progbits
diff --git a/ld/testsuite/ld-aarch64/weak-tls.d b/ld/testsuite/ld-aarch64/weak-tls.d
index a8269406892..60d7d9122c0 100644
--- a/ld/testsuite/ld-aarch64/weak-tls.d
+++ b/ld/testsuite/ld-aarch64/weak-tls.d
@@ -1,8 +1,6 @@
 #source: weak-tls.s
 #ld: -e0 --emit-relocs
-#objdump: -dr
-#...
-#error:.*: warning: Weak TLS is implementation defined and may not work as expected.*
-#error:.*: warning: Weak TLS is implementation defined and may not work as expected.*
-#error:.*: in function `get':.*
-#error:.*: relocation truncated to fit: R_AARCH64_TLSLD_ADD_DTPREL_LO12 against undefined symbol `dtl'.*
+#warning:.*: ignoring TLS relocation .* against undef weak symbol tls
+#warning:.*: ignoring TLS relocation .* against undef weak symbol tls
+#warning:.*: ignoring TLS relocation .* against undef weak symbol dtl
+#warning:.*: ignoring TLS relocation .* against undef weak symbol dtl