Merge changes Ibce7bd9d,Ieab5af35

* changes:
  Turn on XOM for libc
  Switch libc to libcrt.builtins
diff --git a/libc/Android.bp b/libc/Android.bp
index 1487975..262d951 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -77,9 +77,14 @@
     native_coverage: false,
     recovery_available: true,
 
-    // TODO(ivanlozano): Remove after b/118321713
-    no_libcrt: true,
-    xom: false,
+    arch: {
+        x86: {
+            no_libcrt: true,
+        },
+        x86_64: {
+            no_libcrt: true,
+        },
+    },
 }
 
 // ========================================================
@@ -765,7 +770,7 @@
                 "arch-arm/bionic/atomics_arm.c",
                 "arch-arm/bionic/__bionic_clone.S",
                 "arch-arm/bionic/_exit_with_stack_teardown.S",
-                "arch-arm/bionic/libgcc_compat.c",
+                "arch-arm/bionic/libcrt_compat.c",
                 "arch-arm/bionic/popcount_tab.c",
                 "arch-arm/bionic/__restore.S",
                 "arch-arm/bionic/setjmp.S",
@@ -849,7 +854,7 @@
                 "arch-mips/bionic/__bionic_clone.S",
                 "arch-mips/bionic/cacheflush.cpp",
                 "arch-mips/bionic/_exit_with_stack_teardown.S",
-                "arch-mips/bionic/libgcc_compat.c",
+                "arch-mips/bionic/libcrt_compat.c",
                 "arch-mips/bionic/setjmp.S",
                 "arch-mips/bionic/syscall.S",
                 "arch-mips/bionic/vfork.S",
@@ -919,7 +924,7 @@
 
                 "arch-x86/bionic/__bionic_clone.S",
                 "arch-x86/bionic/_exit_with_stack_teardown.S",
-                "arch-x86/bionic/libgcc_compat.c",
+                "arch-x86/bionic/libcrt_compat.c",
                 "arch-x86/bionic/__restore.S",
                 "arch-x86/bionic/setjmp.S",
                 "arch-x86/bionic/syscall.S",
diff --git a/libc/arch-arm/bionic/libgcc_compat.c b/libc/arch-arm/bionic/libcrt_compat.c
similarity index 95%
rename from libc/arch-arm/bionic/libgcc_compat.c
rename to libc/arch-arm/bionic/libcrt_compat.c
index abd1422..22a3387 100644
--- a/libc/arch-arm/bionic/libgcc_compat.c
+++ b/libc/arch-arm/bionic/libcrt_compat.c
@@ -90,6 +90,8 @@
 extern char __floatunsisf;
 extern char __gedf2;
 extern char __gtdf2;
+extern char __gnu_ldivmod_helper;
+extern char __gnu_uldivmod_helper;
 extern char __ledf2;
 extern char __ltdf2;
 extern char __muldf3;
@@ -101,10 +103,11 @@
 extern char __subdf3;
 extern char __subsf3;
 extern char __truncdfsf2;
+extern char __udivdi3;
 extern char __unorddf2;
 extern char __unordsf2;
 
-void* __bionic_libgcc_compat_symbols[] = {
+void* __bionic_libcrt_compat_symbols[] = {
     &__adddf3,
     &__addsf3,
     &__aeabi_cdcmpeq,
@@ -169,6 +172,8 @@
     &__floatunsisf,
     &__gedf2,
     &__gtdf2,
+    &__gnu_ldivmod_helper,
+    &__gnu_uldivmod_helper,
     &__ledf2,
     &__ltdf2,
     &__muldf3,
@@ -180,6 +185,7 @@
     &__subdf3,
     &__subsf3,
     &__truncdfsf2,
+    &__udivdi3,
     &__unorddf2,
     &__unordsf2,
 };
diff --git a/libc/arch-mips/bionic/libgcc_compat.c b/libc/arch-mips/bionic/libcrt_compat.c
similarity index 97%
rename from libc/arch-mips/bionic/libgcc_compat.c
rename to libc/arch-mips/bionic/libcrt_compat.c
index 1a0f566..cfa41f2 100644
--- a/libc/arch-mips/bionic/libgcc_compat.c
+++ b/libc/arch-mips/bionic/libcrt_compat.c
@@ -32,7 +32,7 @@
 extern char __udivdi3;
 extern char __umoddi3;
 
-void* __bionic_libgcc_compat_symbols[] = {
+void* __bionic_libcrt_compat_symbols[] = {
     &__divdi3,
     &__moddi3,
     &__popcountsi2,
diff --git a/libc/arch-x86/bionic/libgcc_compat.c b/libc/arch-x86/bionic/libcrt_compat.c
similarity index 97%
rename from libc/arch-x86/bionic/libgcc_compat.c
rename to libc/arch-x86/bionic/libcrt_compat.c
index 1a0f566..cfa41f2 100644
--- a/libc/arch-x86/bionic/libgcc_compat.c
+++ b/libc/arch-x86/bionic/libcrt_compat.c
@@ -32,7 +32,7 @@
 extern char __udivdi3;
 extern char __umoddi3;
 
-void* __bionic_libgcc_compat_symbols[] = {
+void* __bionic_libcrt_compat_symbols[] = {
     &__divdi3,
     &__moddi3,
     &__popcountsi2,
diff --git a/libc/libc.map.txt b/libc/libc.map.txt
index 6a6ea7d..62aea27 100644
--- a/libc/libc.map.txt
+++ b/libc/libc.map.txt
@@ -1561,7 +1561,7 @@
     __ashldi3; # arm
     __ashrdi3; # arm
     __bionic_brk; # arm x86 mips
-    __bionic_libgcc_compat_symbols; # arm x86
+    __bionic_libcrt_compat_symbols; # arm x86
     __cmpdf2; # arm
     __divdf3; # arm
     __divdi3; # arm x86 mips