diff -Naur old/external/nss/0001-nspr_e2k.patch new/external/nss/0001-nspr_e2k.patch
--- old/external/nss/0001-nspr_e2k.patch	1970-01-01 03:00:00.000000000 +0300
+++ new/external/nss/0001-nspr_e2k.patch	2020-09-09 15:39:17.165373137 +0300
@@ -0,0 +1,96 @@
+diff -Naur a/a/nspr/pr/include/md/_linux.cfg b/b/nspr/pr/include/md/_linux.cfg
+--- a/a/nspr/pr/include/md/_linux.cfg	2019-12-12 16:30:01.770331155 +0300
++++ b/b/nspr/pr/include/md/_linux.cfg	2019-12-13 14:14:20.102737752 +0300
+@@ -1112,6 +1112,52 @@
+ #define PR_BYTES_PER_WORD_LOG2  3
+ #define PR_BYTES_PER_DWORD_LOG2 3
+ 
++#elif defined(__e2k__)
++
++#define IS_LITTLE_ENDIAN 1
++#undef IS_BIG_ENDIAN
++#define IS_64
++
++#define PR_BYTES_PER_BYTE   1
++#define PR_BYTES_PER_SHORT  2
++#define PR_BYTES_PER_INT    4
++#define PR_BYTES_PER_INT64  8
++#define PR_BYTES_PER_LONG   8
++#define PR_BYTES_PER_FLOAT  4
++#define PR_BYTES_PER_DOUBLE 8
++#define PR_BYTES_PER_WORD   8
++#define PR_BYTES_PER_DWORD  8
++
++#define PR_BITS_PER_BYTE    8
++#define PR_BITS_PER_SHORT   16
++#define PR_BITS_PER_INT     32
++#define PR_BITS_PER_INT64   64
++#define PR_BITS_PER_LONG    64
++#define PR_BITS_PER_FLOAT   32 
++#define PR_BITS_PER_DOUBLE  64
++#define PR_BITS_PER_WORD    64
++
++#define PR_BITS_PER_BYTE_LOG2   3
++#define PR_BITS_PER_SHORT_LOG2  4
++#define PR_BITS_PER_INT_LOG2    5
++#define PR_BITS_PER_INT64_LOG2  6
++#define PR_BITS_PER_LONG_LOG2   6
++#define PR_BITS_PER_FLOAT_LOG2  5
++#define PR_BITS_PER_DOUBLE_LOG2 6
++#define PR_BITS_PER_WORD_LOG2   6
++
++#define PR_ALIGN_OF_SHORT   2
++#define PR_ALIGN_OF_INT     4
++#define PR_ALIGN_OF_LONG    8
++#define PR_ALIGN_OF_INT64   8
++#define PR_ALIGN_OF_FLOAT   4
++#define PR_ALIGN_OF_DOUBLE  8
++#define PR_ALIGN_OF_POINTER 8
++#define PR_ALIGN_OF_WORD    8
++
++#define PR_BYTES_PER_WORD_LOG2  3
++#define PR_BYTES_PER_DWORD_LOG2 3
++
+ #else
+ 
+ #error "Unknown CPU architecture"
+diff -Naur a/a/nspr/pr/include/md/_linux.h b/b/nspr/pr/include/md/_linux.h
+--- a/a/nspr/pr/include/md/_linux.h	2019-12-12 16:30:01.770331155 +0300
++++ b/b/nspr/pr/include/md/_linux.h	2019-12-13 14:29:17.939758374 +0300
+@@ -61,6 +61,8 @@
+ #define _PR_SI_ARCHITECTURE "riscv32"
+ #elif defined(__riscv) && (__riscv_xlen == 64)
+ #define _PR_SI_ARCHITECTURE "riscv64"
++#elif defined(__e2k__)
++#define _PR_SI_ARCHITECTURE "e2k"
+ #else
+ #error "Unknown CPU architecture"
+ #endif
+@@ -90,6 +92,15 @@
+ #define _PR_HAVE_SOCKADDR_LEN
+ #endif
+ 
++#if defined(__e2k__)
++#define _PR_HAVE_ATOMIC_OPS
++#define _MD_INIT_ATOMIC()
++#define _MD_ATOMIC_INCREMENT(ptr) __sync_add_and_fetch(ptr, 1)
++#define _MD_ATOMIC_DECREMENT(ptr) __sync_sub_and_fetch(ptr, 1)
++#define _MD_ATOMIC_ADD(ptr, i) __sync_add_and_fetch(ptr, i)
++#define _MD_ATOMIC_SET(ptr, nv) __sync_lock_test_and_set(ptr, nv)
++#endif
++
+ #if defined(__i386__)
+ #define _PR_HAVE_ATOMIC_OPS
+ #define _MD_INIT_ATOMIC()
+diff -Naur a/a/nspr/pr/include/pratom.h b/b/nspr/pr/include/pratom.h
+--- a/a/nspr/pr/include/pratom.h	2019-12-12 16:30:01.774331251 +0300
++++ b/b/nspr/pr/include/pratom.h	2019-12-13 14:34:28.179054128 +0300
+@@ -104,7 +104,7 @@
+            ((defined(__i386__) && \
+            defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)) || \
+            defined(__ia64__) || defined(__x86_64__) || \
+-           defined(__powerpc__) || \
++           defined(__powerpc__) || defined(__e2k__) || \
+            (defined(__arm__) && \
+            defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)) || \
+            defined(__aarch64__) || defined(__alpha) || \
diff -Naur old/external/nss/0002-nss_e2k.patch new/external/nss/0002-nss_e2k.patch
--- old/external/nss/0002-nss_e2k.patch 1970-01-01 03:00:00.000000000 +0300
+++ new/external/nss/0002-nss_e2k.patch 2020-09-09 21:37:56.260073118 +0300
@@ -0,0 +1,33 @@
+diff -Naur a/a/nss/coreconf/config.gypi b/b/nss/coreconf/config.gypi
+--- a/a/nss/coreconf/config.gypi       2019-12-12 16:30:01.778331346 +0300
++++ b/b/nss/coreconf/config.gypi       2019-12-13 15:35:33.794558585 +0300
+@@ -100,7 +100,7 @@
+     'disable_chachapoly%': 0,
+     'disable_dbm%': 0,
+     'disable_libpkix%': 1,
+-    'disable_werror%': 0,
++    'disable_werror%': 1,
+     'mozilla_client%': 0,
+     'comm_client%': 0,
+     'moz_fold_libs%': 0,
+@@ -204,7 +204,7 @@
+           },
+         },
+       }],
+-      [ 'target_arch=="arm64" or target_arch=="aarch64" or target_arch=="sparc64" or target_arch=="ppc64" or target_arch=="ppc64le" or target_arch=="s390x" or target_arch=="mips64"', {
++      [ 'target_arch=="arm64" or target_arch=="aarch64" or target_arch=="sparc64" or target_arch=="ppc64" or target_arch=="ppc64le" or target_arch=="s390x" or target_arch=="mips64" or target_arch=="e2k"', {
+         'defines': [
+           'NSS_USE_64',
+         ],
+diff -Naur a/a/nss/coreconf/arch.mk b/b/nss/coreconf/arch.mk
+--- a/a/nss/coreconf/arch.mk   2019-07-05 19:02:31.000000000 +0300
++++ b/b/nss/coreconf/arch.mk   2020-09-09 21:33:58.974784195 +0300
+@@ -26,7 +26,7 @@
+ # Attempt to differentiate between sparc and x86 Solaris
+ #
+ 
+-OS_TEST := $(shell uname -m)
++OS_TEST ?= $(shell uname -m)
+ ifeq ($(OS_TEST),i86pc)
+     OS_RELEASE := $(shell uname -r)_$(OS_TEST)
+ else
diff -Naur old/external/nss/UnpackedTarball_nss.mk new/external/nss/UnpackedTarball_nss.mk
--- old/external/nss/UnpackedTarball_nss.mk	2020-09-01 17:49:46.004120041 +0300
+++ new/external/nss/UnpackedTarball_nss.mk	2020-09-09 18:54:05.355265696 +0300
@@ -34,6 +34,9 @@
 	$(if $(filter ANDROID,$(OS)), \
 		external/nss/nss-android.patch.1) \
 	external/nss/nss.bzmozilla1238154.patch \
+	external/nss/0001-nspr_e2k.patch \
+	external/nss/0002-nss_e2k.patch \
+	external/nss/0003-subguess_e2k.patch \
 ))
 
 ifeq ($(COM_IS_CLANG),TRUE)
diff -Naur old/external/nss/0003-subguess_e2k.patch new/external/nss/0003-subguess_e2k.patch
--- old/external/nss/0003-subguess_e2k.patch	1970-01-01 03:00:00.000000000 +0300
+++ new/external/nss/0003-subguess_e2k.patch	2020-09-09 18:52:59.173775080 +0300
@@ -0,0 +1,54 @@
+diff -Naur a/a/nspr/build/autoconf/config.guess b/b/nspr/build/autoconf/config.guess
+--- a/a/nspr/build/autoconf/config.guess	2020-09-09 15:36:09.155007156 +0000
++++ b/b/nspr/build/autoconf/config.guess	2020-09-09 15:45:36.907811590 +0000
+@@ -215,6 +215,18 @@
+ 	# CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM is used.
+ 	echo "${machine}-${os}${release}"
+ 	exit ;;
++    e2k:Linux:*|elbrus:Linux:*)
++        echo e2k-mcst-linux-gnu
++        exit ;;
++    e2k:QNX:*)
++        echo e2k-mcst-qnx
++        exit ;;
++    sparc:Linux:*elbrus*:*)
++        echo sparc-mcst-linux-gnu
++        exit ;;
++    sparc64:Linux:*elbrus*:*)
++        echo sparc-mcst-linux-gnu
++        exit ;;
+     *:Bitrig:*:*)
+ 	UNAME_MACHINE_ARCH=`arch | sed 's/Bitrig.//'`
+ 	echo ${UNAME_MACHINE_ARCH}-unknown-bitrig${UNAME_RELEASE}
+diff -Naur a/a/nspr/build/autoconf/config.sub b/b/nspr/build/autoconf/config.sub
+--- a/a/nspr/build/autoconf/config.sub	2020-09-09 15:36:09.155007156 +0000
++++ b/b/nspr/build/autoconf/config.sub	2020-09-09 15:40:31.508929025 +0000
+@@ -628,6 +628,18 @@
+ 		basic_machine=a29k-amd
+ 		os=-ebmon
+ 		;;
++	e2k|elbrus)
++		basic_machine=e2k-mcst
++		;;
++	e2k-mcst|elbrus-mcst)
++		basic_machine=e2k-mcst
++		;;
++	sparc-mcst)
++		basic_machine=sparc-mcst
++		;;
++	sparc64-mcst)
++		basic_machine=sparc64-mcst
++		;;
+ 	elxsi)
+ 		basic_machine=elxsi-elxsi
+ 		os=-bsd
+@@ -1529,6 +1541,9 @@
+ # system, and we'll never get to this point.
+ 
+ case $basic_machine in
++	e2k-*|elbrus-*)
++		os=-linux-gnu
++		;;
+ 	score-*)
+ 		os=-elf
+ 		;;
--- old/external/nss/ExternalProject_nss.mk	2020-09-01 17:49:46.004120041 +0300
+++ new/external/nss/ExternalProject_nss.mk	2020-09-09 21:08:17.732239496 +0300
@@ -44,6 +44,7 @@
 		$(if $(CROSS_COMPILING),\
 			$(if $(filter MACOSXPOWERPC,$(OS)$(CPUNAME)),CPU_ARCH=ppc) \
 			$(if $(filter iOS-ARM,$(OS)-$(CPUNAME)),CPU_ARCH=arm) \
+			$(if $(filter E2K,$(CPUNAME)),OS_TEST=e2k USE_64=1 CROSS_COMPILE=1) \
 			NSPR_CONFIGURE_OPTS="--build=$(BUILD_PLATFORM) --host=$(HOST_PLATFORM)") \
 		NSDISTMODE=copy \
 		$(MAKE) -j1 AR="$(AR)" \