diff --git a/b2g/config/aries/releng-aries.tt b/b2g/config/aries/releng-aries.tt
index f47e990a12b7..7179957e1181 100644
--- a/b2g/config/aries/releng-aries.tt
+++ b/b2g/config/aries/releng-aries.tt
@@ -1,8 +1,8 @@
 [
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": "True"
diff --git a/b2g/config/dolphin/releng-dolphin.tt b/b2g/config/dolphin/releng-dolphin.tt
index f47e990a12b7..7179957e1181 100644
--- a/b2g/config/dolphin/releng-dolphin.tt
+++ b/b2g/config/dolphin/releng-dolphin.tt
@@ -1,8 +1,8 @@
 [
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": "True"
diff --git a/b2g/config/emulator-ics/releng-emulator-ics.tt b/b2g/config/emulator-ics/releng-emulator-ics.tt
index 919d07216337..46fc2497be3a 100644
--- a/b2g/config/emulator-ics/releng-emulator-ics.tt
+++ b/b2g/config/emulator-ics/releng-emulator-ics.tt
@@ -1,8 +1,8 @@
 [
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
diff --git a/b2g/config/emulator-jb/releng-emulator-jb.tt b/b2g/config/emulator-jb/releng-emulator-jb.tt
index 919d07216337..46fc2497be3a 100644
--- a/b2g/config/emulator-jb/releng-emulator-jb.tt
+++ b/b2g/config/emulator-jb/releng-emulator-jb.tt
@@ -1,8 +1,8 @@
 [
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
diff --git a/b2g/config/emulator-kk/releng-emulator-kk.tt b/b2g/config/emulator-kk/releng-emulator-kk.tt
index 919d07216337..46fc2497be3a 100644
--- a/b2g/config/emulator-kk/releng-emulator-kk.tt
+++ b/b2g/config/emulator-kk/releng-emulator-kk.tt
@@ -1,8 +1,8 @@
 [
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
diff --git a/b2g/config/emulator-l/releng-emulator-l.tt b/b2g/config/emulator-l/releng-emulator-l.tt
index 919d07216337..46fc2497be3a 100644
--- a/b2g/config/emulator-l/releng-emulator-l.tt
+++ b/b2g/config/emulator-l/releng-emulator-l.tt
@@ -1,8 +1,8 @@
 [
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
diff --git a/b2g/config/emulator-x86-kk/releng-emulator-kk.tt b/b2g/config/emulator-x86-kk/releng-emulator-kk.tt
index 919d07216337..46fc2497be3a 100644
--- a/b2g/config/emulator-x86-kk/releng-emulator-kk.tt
+++ b/b2g/config/emulator-x86-kk/releng-emulator-kk.tt
@@ -1,8 +1,8 @@
 [
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
diff --git a/b2g/config/emulator-x86-l/releng-emulator-l.tt b/b2g/config/emulator-x86-l/releng-emulator-l.tt
index 919d07216337..46fc2497be3a 100644
--- a/b2g/config/emulator-x86-l/releng-emulator-l.tt
+++ b/b2g/config/emulator-x86-l/releng-emulator-l.tt
@@ -1,8 +1,8 @@
 [
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
diff --git a/b2g/config/emulator/releng-emulator.tt b/b2g/config/emulator/releng-emulator.tt
index 919d07216337..46fc2497be3a 100644
--- a/b2g/config/emulator/releng-emulator.tt
+++ b/b2g/config/emulator/releng-emulator.tt
@@ -1,8 +1,8 @@
 [
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
diff --git a/b2g/config/flame-kk/releng-flame-kk.tt b/b2g/config/flame-kk/releng-flame-kk.tt
index 75d0bd3ec003..c9258da6bba7 100644
--- a/b2g/config/flame-kk/releng-flame-kk.tt
+++ b/b2g/config/flame-kk/releng-flame-kk.tt
@@ -7,9 +7,9 @@
 "comment": "v18D"
 },
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": "True"
diff --git a/b2g/config/flame/releng-flame.tt b/b2g/config/flame/releng-flame.tt
index ad5bca030b96..5a9c9a7dbefd 100644
--- a/b2g/config/flame/releng-flame.tt
+++ b/b2g/config/flame/releng-flame.tt
@@ -5,9 +5,9 @@
 "algorithm": "sha512"
 },
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": "True"
diff --git a/b2g/config/nexus-4-kk/releng-mako.tt b/b2g/config/nexus-4-kk/releng-mako.tt
index 59753649250a..5099fadea857 100644
--- a/b2g/config/nexus-4-kk/releng-mako.tt
+++ b/b2g/config/nexus-4-kk/releng-mako.tt
@@ -18,9 +18,9 @@
 "filename": "lge-mako-kot49h-f59c98be.tgz"
 },
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": "True"
diff --git a/b2g/config/nexus-4/releng-mako.tt b/b2g/config/nexus-4/releng-mako.tt
index 798d620ab809..5a77f2830cbe 100644
--- a/b2g/config/nexus-4/releng-mako.tt
+++ b/b2g/config/nexus-4/releng-mako.tt
@@ -18,9 +18,9 @@
 "filename": "lge-mako-jwr66v-985845e4.tgz"
 },
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": "True"
diff --git a/b2g/config/nexus-5-l/releng-nexus5.tt b/b2g/config/nexus-5-l/releng-nexus5.tt
index 6634a5aa45a7..40720bbe9227 100644
--- a/b2g/config/nexus-5-l/releng-nexus5.tt
+++ b/b2g/config/nexus-5-l/releng-nexus5.tt
@@ -1,7 +1,7 @@
 [{
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": "True"
diff --git a/b2g/config/tooltool-manifests/linux32/releng.manifest b/b2g/config/tooltool-manifests/linux32/releng.manifest
index 241cb52aa7f4..c1fd5eac11dd 100644
--- a/b2g/config/tooltool-manifests/linux32/releng.manifest
+++ b/b2g/config/tooltool-manifests/linux32/releng.manifest
@@ -1,8 +1,8 @@
 [
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
diff --git a/browser/config/tooltool-manifests/linux32/releng.manifest b/browser/config/tooltool-manifests/linux32/releng.manifest
index 8c5d2f0ffa3e..7e0f73feeba8 100644
--- a/browser/config/tooltool-manifests/linux32/releng.manifest
+++ b/browser/config/tooltool-manifests/linux32/releng.manifest
@@ -1,8 +1,8 @@
 [
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512", 
 "filename": "gcc.tar.xz",
 "unpack": true
diff --git a/browser/config/tooltool-manifests/linux64/releng.manifest b/browser/config/tooltool-manifests/linux64/releng.manifest
index 5147491bc4a6..4a7596fe327d 100644
--- a/browser/config/tooltool-manifests/linux64/releng.manifest
+++ b/browser/config/tooltool-manifests/linux64/releng.manifest
@@ -1,8 +1,8 @@
 [
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512", 
 "filename": "gcc.tar.xz",
 "unpack": true
diff --git a/build/unix/build-gcc/PR64905.patch b/build/unix/build-gcc/PR64905.patch
new file mode 100644
index 000000000000..b86c99b9f03f
--- /dev/null
+++ b/build/unix/build-gcc/PR64905.patch
@@ -0,0 +1,11 @@
+--- trunk/gcc/lra-eliminations.c	2015/02/04 20:00:48	220415
++++ trunk/gcc/lra-eliminations.c	2015/02/04 20:02:21	220416
+@@ -182,6 +182,8 @@
+   if (! value
+       && ep->from == FRAME_POINTER_REGNUM && ep->to == STACK_POINTER_REGNUM)
+     frame_pointer_needed = 1;
++  if (!frame_pointer_needed)
++    REGNO_POINTER_ALIGN (HARD_FRAME_POINTER_REGNUM) = 0;
+ }
+ 
+ /* Map: eliminable "from" register -> its current elimination,
diff --git a/build/unix/build-gcc/build-gcc.sh b/build/unix/build-gcc/build-gcc.sh
index da156cc1331e..df3bc5dfd365 100755
--- a/build/unix/build-gcc/build-gcc.sh
+++ b/build/unix/build-gcc/build-gcc.sh
@@ -39,6 +39,8 @@ cd gcc-$gcc_version
 
 ./contrib/download_prerequisites
 
+patch -p1 < "${this_path}/PR64905.patch" || exit 1
+
 cd ..
 mkdir gcc-objdir
 cd gcc-objdir
diff --git a/mobile/android/config/tooltool-manifests/android-x86/releng.manifest b/mobile/android/config/tooltool-manifests/android-x86/releng.manifest
index 6f6e907c92a3..efc0e4bc22c6 100644
--- a/mobile/android/config/tooltool-manifests/android-x86/releng.manifest
+++ b/mobile/android/config/tooltool-manifests/android-x86/releng.manifest
@@ -38,9 +38,9 @@
 "unpack": true
 },
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
diff --git a/mobile/android/config/tooltool-manifests/android/releng.manifest b/mobile/android/config/tooltool-manifests/android/releng.manifest
index 2e248c9ef365..515632085cfc 100644
--- a/mobile/android/config/tooltool-manifests/android/releng.manifest
+++ b/mobile/android/config/tooltool-manifests/android/releng.manifest
@@ -40,13 +40,12 @@
 "filename": "jsshell.tar.xz"
 },
 {
-"version": "gcc 4.8.5",
-"size": 81065660,
-"visibility": "public",
-"unpack": true,
-"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
+"version": "gcc 4.8.5 + PR64905",
+"size": 80160264,
+"digest": "c1a9dc9da289b8528874d16300b9d13a997cec99195bb0bc46ff665216d8535d6d6cb5af6b4b1f2749af6815dab12e703fdb3849014e5c23a70eff351a0baf4e",
 "algorithm": "sha512",
-"filename": "gcc.tar.xz"
+"filename": "gcc.tar.xz",
+"unpack": true
 },
 {
 "size": 30899096,