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-rw-r--r--js/src/jit/arm/Assembler-arm.cpp7
-rw-r--r--js/src/jit/arm/MacroAssembler-arm.cpp5
2 files changed, 10 insertions, 2 deletions
diff --git a/js/src/jit/arm/Assembler-arm.cpp b/js/src/jit/arm/Assembler-arm.cpp
index 2830f0695..1e20da1c8 100644
--- a/js/src/jit/arm/Assembler-arm.cpp
+++ b/js/src/jit/arm/Assembler-arm.cpp
@@ -2401,7 +2401,12 @@ Assembler::as_b(Label* l, Condition c)
if (oom())
return BufferOffset();
- as_b(BufferOffset(l).diffB<BOffImm>(ret), c, ret);
+ BOffImm off = BufferOffset(l).diffB<BOffImm>(ret);
+ if (off.isInvalid()) {
+ m_buffer.fail_bail();
+ return BufferOffset();
+ }
+ as_b(off, c, ret);
#ifdef JS_DISASM_ARM
spewBranch(m_buffer.getInstOrNull(ret), l);
#endif
diff --git a/js/src/jit/arm/MacroAssembler-arm.cpp b/js/src/jit/arm/MacroAssembler-arm.cpp
index d40578514..a4161ab00 100644
--- a/js/src/jit/arm/MacroAssembler-arm.cpp
+++ b/js/src/jit/arm/MacroAssembler-arm.cpp
@@ -5012,7 +5012,10 @@ void
MacroAssembler::patchCall(uint32_t callerOffset, uint32_t calleeOffset)
{
BufferOffset inst(callerOffset - 4);
- as_bl(BufferOffset(calleeOffset).diffB<BOffImm>(inst), Always, inst);
+ BOffImm off = BufferOffset(calleeOffset).diffB<BOffImm>(inst);
+ MOZ_RELEASE_ASSERT(!off.isInvalid(),
+ "Failed to insert necessary far jump islands");
+ as_bl(off, Always, inst);
}
CodeOffset