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The ISB instruction isn't available in ARMv5 or v6, so
guard it's use to fix the build on qemuarmv5.
Upstream-Status: Pending
Signed-off-by: Ross Burton <ross.burton@arm.com>
diff --git a/js/src/jit/arm/Architecture-arm.cpp b/js/src/jit/arm/Architecture-arm.cpp
--- a/js/src/jit/arm/Architecture-arm.cpp 2024-01-18 17:31:32.078718197 +0000
+++ b/js/src/jit/arm/Architecture-arm.cpp 2024-01-18 18:00:16.738921445 +0000
@@ -529,7 +529,9 @@
void FlushExecutionContext() {
#ifndef JS_SIMULATOR_ARM
+#if __ARM_ARCH >= 7
// Ensure that any instructions already in the pipeline are discarded and
// reloaded from the icache.
asm volatile("isb\n" : : : "memory");
+#endif
#else
// We assume the icache flushing routines on other platforms take care of this
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