diff -urNp -x '*.orig' qtwebengine.org/src/3rdparty/chromium/base/allocator/partition_allocator/address_space_randomization.cc qtwebengine/src/3rdparty/chromium/base/allocator/partition_allocator/address_space_randomization.cc
--- qtwebengine.org/src/3rdparty/chromium/base/allocator/partition_allocator/address_space_randomization.cc	2021-08-13 12:36:55.000000000 +0200
+++ qtwebengine/src/3rdparty/chromium/base/allocator/partition_allocator/address_space_randomization.cc	2021-08-14 11:13:23.606971650 +0200
@@ -21,7 +21,7 @@ namespace base {
 void* GetRandomPageBase() {
   uintptr_t random = static_cast<uintptr_t>(RandomValue());
 
-#if defined(ARCH_CPU_64_BITS)
+#if defined(ARCH_CPU_64_BITS) && !defined(__ILP32__)
   random <<= 32ULL;
   random |= static_cast<uintptr_t>(RandomValue());
 
diff -urNp -x '*.orig' qtwebengine.org/src/3rdparty/chromium/base/debug/stack_trace_posix.cc qtwebengine/src/3rdparty/chromium/base/debug/stack_trace_posix.cc
--- qtwebengine.org/src/3rdparty/chromium/base/debug/stack_trace_posix.cc	2021-08-13 12:36:55.000000000 +0200
+++ qtwebengine/src/3rdparty/chromium/base/debug/stack_trace_posix.cc	2021-08-14 11:13:23.606971650 +0200
@@ -351,7 +351,7 @@ void StackDumpSignalHandler(int signal,
     const char* label;
     greg_t value;
   } registers[] = {
-#if ARCH_CPU_32_BITS
+#if ARCH_CPU_32_BITS && !defined(__ILP32__)
     { "  gs: ", context->uc_mcontext.gregs[REG_GS] },
     { "  fs: ", context->uc_mcontext.gregs[REG_FS] },
     { "  es: ", context->uc_mcontext.gregs[REG_ES] },
@@ -371,7 +371,7 @@ void StackDumpSignalHandler(int signal,
     { " efl: ", context->uc_mcontext.gregs[REG_EFL] },
     { " usp: ", context->uc_mcontext.gregs[REG_UESP] },
     { "  ss: ", context->uc_mcontext.gregs[REG_SS] },
-#elif ARCH_CPU_64_BITS
+#elif ARCH_CPU_64_BITS || defined(__ILP32__)
     { "  r8: ", context->uc_mcontext.gregs[REG_R8] },
     { "  r9: ", context->uc_mcontext.gregs[REG_R9] },
     { " r10: ", context->uc_mcontext.gregs[REG_R10] },
@@ -398,9 +398,9 @@ void StackDumpSignalHandler(int signal,
 #endif  // ARCH_CPU_32_BITS
   };
 
-#if ARCH_CPU_32_BITS
+#if ARCH_CPU_32_BITS && !defined(__ILP32__)
   const int kRegisterPadding = 8;
-#elif ARCH_CPU_64_BITS
+#elif ARCH_CPU_64_BITS || defined(__ILP32__)
   const int kRegisterPadding = 16;
 #endif
 
diff -urNp -x '*.orig' qtwebengine.org/src/3rdparty/chromium/build/build_config.h qtwebengine/src/3rdparty/chromium/build/build_config.h
--- qtwebengine.org/src/3rdparty/chromium/build/build_config.h	2021-08-13 12:36:55.000000000 +0200
+++ qtwebengine/src/3rdparty/chromium/build/build_config.h	2021-08-14 11:13:23.606971650 +0200
@@ -129,7 +129,11 @@
 #if defined(_M_X64) || defined(__x86_64__)
 #define ARCH_CPU_X86_FAMILY 1
 #define ARCH_CPU_X86_64 1
+#ifdef __ILP32__
+#define ARCH_CPU_32_BITS 1
+#else
 #define ARCH_CPU_64_BITS 1
+#endif
 #define ARCH_CPU_LITTLE_ENDIAN 1
 #elif defined(_M_IX86) || defined(__i386__)
 #define ARCH_CPU_X86_FAMILY 1
diff -urNp -x '*.orig' qtwebengine.org/src/3rdparty/chromium/build/config/compiler/BUILD.gn qtwebengine/src/3rdparty/chromium/build/config/compiler/BUILD.gn
--- qtwebengine.org/src/3rdparty/chromium/build/config/compiler/BUILD.gn	2021-08-13 12:36:55.000000000 +0200
+++ qtwebengine/src/3rdparty/chromium/build/config/compiler/BUILD.gn	2021-08-14 11:13:23.606971650 +0200
@@ -765,14 +765,7 @@ config("compiler_cpu_abi") {
   if ((is_posix && !is_apple) || is_fuchsia) {
     # CPU architecture. We may or may not be doing a cross compile now, so for
     # simplicity we always explicitly set the architecture.
-    if (current_cpu == "x64") {
-      cflags += [
-        "-m64",
-      ]
-      ldflags += [ "-m64" ]
-    } else if (current_cpu == "x86") {
-      cflags += [ "-m32" ]
-      ldflags += [ "-m32" ]
+    if (current_cpu == "x86") {
       if (!is_nacl) {
         cflags += [
           "-msse2",
diff -urNp -x '*.orig' qtwebengine.org/src/3rdparty/chromium/third_party/boringssl/src/crypto/fipsmodule/rand/getrandom_fillin.h qtwebengine/src/3rdparty/chromium/third_party/boringssl/src/crypto/fipsmodule/rand/getrandom_fillin.h
--- qtwebengine.org/src/3rdparty/chromium/third_party/boringssl/src/crypto/fipsmodule/rand/getrandom_fillin.h	2021-08-13 12:36:59.000000000 +0200
+++ qtwebengine/src/3rdparty/chromium/third_party/boringssl/src/crypto/fipsmodule/rand/getrandom_fillin.h	2021-08-14 11:13:23.606971650 +0200
@@ -23,7 +23,11 @@
 #include <sys/syscall.h>
 
 #if defined(OPENSSL_X86_64)
+#if defined(__ILP32__)
+#define EXPECTED_NR_getrandom (__X32_SYSCALL_BIT + 318)
+#else
 #define EXPECTED_NR_getrandom 318
+#endif
 #elif defined(OPENSSL_X86)
 #define EXPECTED_NR_getrandom 355
 #elif defined(OPENSSL_AARCH64)
diff -urNp -x '*.orig' qtwebengine.org/src/3rdparty/chromium/v8/src/objects/bigint.cc qtwebengine/src/3rdparty/chromium/v8/src/objects/bigint.cc
--- qtwebengine.org/src/3rdparty/chromium/v8/src/objects/bigint.cc	2021-08-13 12:37:04.000000000 +0200
+++ qtwebengine/src/3rdparty/chromium/v8/src/objects/bigint.cc	2021-08-14 11:13:23.606971650 +0200
@@ -2641,7 +2641,7 @@ inline BigInt::digit_t MutableBigInt::di
 BigInt::digit_t MutableBigInt::digit_div(digit_t high, digit_t low,
                                          digit_t divisor, digit_t* remainder) {
   DCHECK(high < divisor);
-#if V8_TARGET_ARCH_X64 && (__GNUC__ || __clang__)
+#if V8_TARGET_ARCH_X64 && (__GNUC__ || __clang__) && !defined(__ILP32__)
   digit_t quotient;
   digit_t rem;
   __asm__("divq  %[divisor]"