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mozjs60: add endianness patches from Debian

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This alone does not yet fix ppc64, though.

Signed-off-by: Jürgen Buchmüller <pullmoll@t-online.de>
This commit is contained in:
Jürgen Buchmüller 2019-06-01 16:22:15 +02:00
parent eea08561c2
commit 79c8329e8f
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2 changed files with 149 additions and 0 deletions
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127
srcpkgs/mozjs60/patches/enddianness.patch Normal file
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@ -0,0 +1,127 @@
Bug 1488552 - Ensure proper running on 64-bit and 32-bit BE platforms.
Index: mozjs60/js/src/gc/Marking-inl.h
===================================================================
--- a/js/src/gc/Marking-inl.h 2019-02-21 14:44:28.296951992 +0100
+++ b/js/src/gc/Marking-inl.h 2019-02-22 10:22:54.612120604 +0100
@@ -82,12 +82,28 @@
MOZ_ASSERT(!isForwarded());
// The location of magic_ is important because it must never be valid to see
// the value Relocated there in a GC thing that has not been moved.
+#if MOZ_LITTLE_ENDIAN || JS_BITS_PER_WORD == 32
+ // On 32-bit, the magic_ aliases with whatever comes after the first
+ // pointer; on little-endian 64-bit, the magic_ aliases with the
+ // 32 most significant bits of the pointer, which are the second half.
static_assert(offsetof(RelocationOverlay, magic_) ==
offsetof(JSObject, group_) + sizeof(uint32_t),
"RelocationOverlay::magic_ is in the wrong location");
static_assert(offsetof(RelocationOverlay, magic_) ==
offsetof(js::Shape, base_) + sizeof(uint32_t),
"RelocationOverlay::magic_ is in the wrong location");
+#elif JS_BITS_PER_WORD == 64
+ // On big-endian 64-bit, the magic_ aliases with the 32 most
+ // significant bits of the pointer, but now that's the first half.
+ static_assert(offsetof(RelocationOverlay, magic_) ==
+ offsetof(JSObject, group_),
+ "RelocationOverlay::magic_ is in the wrong location");
+ static_assert(offsetof(RelocationOverlay, magic_) ==
+ offsetof(js::Shape, base_),
+ "RelocationOverlay::magic_ is in the wrong location");
+#else
+# error "Unknown endianness or word size"
+#endif
static_assert(
offsetof(RelocationOverlay, magic_) == offsetof(JSString, d.u1.length),
"RelocationOverlay::magic_ is in the wrong location");
Index: mozjs60/js/src/gc/RelocationOverlay.h
===================================================================
--- a/js/src/gc/RelocationOverlay.h 2019-02-21 14:44:28.296951992 +0100
+++ b/js/src/gc/RelocationOverlay.h 2019-02-22 10:19:41.816822202 +0100
@@ -34,14 +34,25 @@
/* See comment in js/public/HeapAPI.h. */
static const uint32_t Relocated = js::gc::Relocated;
+#if MOZ_LITTLE_ENDIAN || JS_BITS_PER_WORD == 32
/*
- * Keep the low 32 bits untouched. Use them to distinguish strings from
+ * Keep the first 32 bits untouched. Use them to distinguish strings from
* objects in the nursery.
*/
uint32_t preserve_;
/* Set to Relocated when moved. */
uint32_t magic_;
+#elif JS_BITS_PER_WORD == 64
+ /*
+ * On big-endian, we need to reorder to keep preserve_ lined up with the
+ * low 32 bits of the aligned group_ pointer in JSObject.
+ */
+ uint32_t magic_;
+ uint32_t preserve_;
+#else
+# error "Unknown endianness or word size"
+#endif
/* The location |this| was moved to. */
Cell* newLocation_;
Index: mozjs60/js/src/jsfriendapi.h
===================================================================
--- a/js/src/jsfriendapi.h 2019-02-21 14:44:28.484951245 +0100
+++ b/js/src/jsfriendapi.h 2019-02-22 10:24:25.663774399 +0100
@@ -9,6 +9,7 @@
#include "mozilla/Atomics.h"
#include "mozilla/Casting.h"
+#include "mozilla/EndianUtils.h"
#include "mozilla/Maybe.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/UniquePtr.h"
@@ -640,8 +641,15 @@
static const uint32_t LATIN1_CHARS_BIT = JS_BIT(6);
static const uint32_t EXTERNAL_FLAGS = LINEAR_BIT | NON_ATOM_BIT | JS_BIT(5);
static const uint32_t TYPE_FLAGS_MASK = JS_BIT(6) - 1;
+#if MOZ_LITTLE_ENDIAN || JS_BITS_PER_WORD == 32
uint32_t flags;
uint32_t length;
+#elif JS_BITS_PER_WORD == 64
+ uint32_t length;
+ uint32_t flags;
+#else
+# error "Unknown endianness or word size"
+#endif
union {
const JS::Latin1Char* nonInlineCharsLatin1;
const char16_t* nonInlineCharsTwoByte;
Index: mozjs60/js/src/vm/StringType.h
===================================================================
--- a/js/src/vm/StringType.h 2019-02-21 14:44:29.072948907 +0100
+++ b/js/src/vm/StringType.h 2019-02-22 10:21:20.464469244 +0100
@@ -7,6 +7,7 @@
#ifndef vm_StringType_h
#define vm_StringType_h
+#include "mozilla/EndianUtils.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/PodOperations.h"
#include "mozilla/Range.h"
@@ -166,8 +167,20 @@
{
union {
struct {
+#if MOZ_LITTLE_ENDIAN || JS_BITS_PER_WORD == 32
uint32_t flags; /* JSString */
uint32_t length; /* JSString */
+#elif JS_BITS_PER_WORD == 64
+ /*
+ * On big-endian, we need to reorder to keep flags lined up
+ * with the low 32 bits of the aligned group_ pointer in
+ * JSObject.
+ */
+ uint32_t length; /* JSString */
+ uint32_t flags; /* JSString */
+#else
+# error "Unknown endianness or word size"
+#endif
};
uintptr_t flattenData; /* JSRope (temporary while flattening) */
} u1;

22
srcpkgs/mozjs60/patches/jsproperty-endian.patch Normal file
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@ -0,0 +1,22 @@
Bug 1543659 - fix JSPropertySpec::ValueWrapper on 64-bit big-endian platforms
Add some padding to make the union's int32 member correspond to the
low-order bits of the string member. This fixes TypedArray tests on
s390x.
--- a/js/src/jsapi.h
+++ b/js/src/jsapi.h
@@ -1702,7 +1702,12 @@
uintptr_t type;
union {
const char* string;
- int32_t int32;
+ struct {
+#if MOZ_BIG_ENDIAN && JS_BITS_PER_WORD == 64
+ uint32_t padding;
+#endif
+ int32_t int32;
+ };
};
};