From 343041014c6a622d2c39df51e10acc5dd180f34b Mon Sep 17 00:00:00 2001
From: Martin Stransky <stransky@redhat.com>
Date: Thu, 3 May 2018 13:43:55 +0200
Subject: [PATCH] Added patch from mozbz#1375074 - fixes aarch64 baseline JIT
 crashes

---
 bug1375074-save-restore-x28.patch | 74 +++++++++++++++++++++++++++++++
 firefox.spec                      |  7 ++-
 2 files changed, 80 insertions(+), 1 deletion(-)
 create mode 100644 bug1375074-save-restore-x28.patch

diff --git a/bug1375074-save-restore-x28.patch b/bug1375074-save-restore-x28.patch
new file mode 100644
index 0000000..57a83a2
--- /dev/null
+++ b/bug1375074-save-restore-x28.patch
@@ -0,0 +1,74 @@
+# HG changeset patch
+# User Lars T Hansen <lhansen@mozilla.com>
+# Date 1519822672 -3600
+#      Wed Feb 28 13:57:52 2018 +0100
+# Node ID 672f0415217b202ae59a930769dffd9d6ba6b87c
+# Parent  825fd04dacc6297d3a980ec4184079405950b35d
+Bug 1375074 - Save and restore non-volatile x28 on ARM64 for generated unboxed object constructor.
+
+diff --git a/js/src/jit-test/tests/bug1375074.js b/js/src/jit-test/tests/bug1375074.js
+new file mode 100644
+--- /dev/null
++++ b/js/src/jit-test/tests/bug1375074.js
+@@ -0,0 +1,18 @@
++// This forces the VM to start creating unboxed objects and thus stresses a
++// particular path into generated code for a specialized unboxed object
++// constructor.
++
++var K = 2000;			// 2000 should be plenty
++var s = "[";
++var i;
++for ( i=0; i < K-1; i++ )
++    s = s + `{"i":${i}},`;
++s += `{"i":${i}}]`;
++var v = JSON.parse(s);
++
++assertEq(v.length == K, true);
++
++for ( i=0; i < K; i++) {
++    assertEq(v[i] instanceof Object, true);
++    assertEq(v[i].i, i);
++}
+diff --git a/js/src/vm/UnboxedObject.cpp b/js/src/vm/UnboxedObject.cpp
+--- a/js/src/vm/UnboxedObject.cpp
++++ b/js/src/vm/UnboxedObject.cpp
+@@ -95,7 +95,15 @@ UnboxedLayout::makeConstructorCode(JSCon
+ #endif
+ 
+ #ifdef JS_CODEGEN_ARM64
+-    // ARM64 communicates stack address via sp, but uses a pseudo-sp for addressing.
++    // ARM64 communicates stack address via sp, but uses a pseudo-sp (PSP) for
++    // addressing.  The register we use for PSP may however also be used by
++    // calling code, and it is nonvolatile, so save it.  Do this as a special
++    // case first because the generic save/restore code needs the PSP to be
++    // initialized already.
++    MOZ_ASSERT(PseudoStackPointer64.Is(masm.GetStackPointer64()));
++    masm.Str(PseudoStackPointer64, vixl::MemOperand(sp, -16, vixl::PreIndex));
++
++    // Initialize the PSP from the SP.
+     masm.initStackPtr();
+ #endif
+ 
+@@ -233,7 +241,22 @@ UnboxedLayout::makeConstructorCode(JSCon
+         masm.pop(ScratchDoubleReg);
+     masm.PopRegsInMask(savedNonVolatileRegisters);
+ 
++#ifdef JS_CODEGEN_ARM64
++    // Now restore the value that was in the PSP register on entry, and return.
++
++    // Obtain the correct SP from the PSP.
++    masm.Mov(sp, PseudoStackPointer64);
++
++    // Restore the saved value of the PSP register, this value is whatever the
++    // caller had saved in it, not any actual SP value, and it must not be
++    // overwritten subsequently.
++    masm.Ldr(PseudoStackPointer64, vixl::MemOperand(sp, 16, vixl::PostIndex));
++
++    // Perform a plain Ret(), as abiret() will move SP <- PSP and that is wrong.
++    masm.Ret(vixl::lr);
++#else
+     masm.abiret();
++#endif
+ 
+     masm.bind(&failureStoreOther);
+ 
diff --git a/firefox.spec b/firefox.spec
index bb036d5..4c60a42 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -102,7 +102,7 @@
 Summary:        Mozilla Firefox Web browser
 Name:           firefox
 Version:        60.0
-Release:        2%{?pre_tag}%{?dist}
+Release:        3%{?pre_tag}%{?dist}
 URL:            https://www.mozilla.org/firefox/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 Source0:        https://hg.mozilla.org/releases/mozilla-release/archive/firefox-%{version}%{?pre_version}.source.tar.xz
@@ -158,6 +158,7 @@ Patch413:        mozilla-1353817.patch
 Patch414:        mozilla-1435212-ffmpeg-4.0.patch
 Patch415:        Bug-1238661---fix-mozillaSignalTrampoline-to-work-.patch
 Patch416:        mozilla-1424422.patch
+Patch417:        bug1375074-save-restore-x28.patch
 
 Patch421:        complete-csd-window-offset-mozilla-1457691.patch
 
@@ -329,6 +330,7 @@ This package contains results of tests executed during build.
 %patch415 -p1 -b .mozilla-1238661
 %endif
 %patch416 -p1 -b .1424422
+%patch417 -p1 -b .bug1375074-save-restore-x28
 
 %patch421 -p1 -b .mozilla-1457691
 
@@ -871,6 +873,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #---------------------------------------------------------------------
 
 %changelog
+* Thu May 3 2018 Martin Stransky <stransky@redhat.com> - 60.0-3
+- Added patch from mozbz#1375074 - fixes aarch64 baseline JIT crashes
+
 * Thu May 3 2018 Martin Stransky <stransky@redhat.com> - 60.0-2
 - Make Wayland backend optional and disable it by default due to WebGL issues.