Fix crash when running QtCore: Stack is misaligned on x86-64

When our ELF entry point function is started by the kernel, the stack is aligned at 16 bytes. However, the stack is expected to be off by 8, due to a preceding CALL instruction which didn't exist. This cauases a crash further down as the compiler may generate aligned stack access. Change-Id: I1496b069cc534f1a838dfffd15c9dc4ef9e3869e Reviewed-by: Edward Welbourne <[email protected]>
wx984490083 · Oct 3, 2019 · 9328058 · 9328058
1 parent 5aa13ea
commit 9328058
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/corelib/global/qlibraryinfo.cpp b/src/corelib/global/qlibraryinfo.cpp
@@ -709,10 +709,14 @@ QT_END_NAMESPACE
 
 #include "private/qcoreapplication_p.h"
 
+QT_WARNING_DISABLE_GCC("-Wattributes")
+QT_WARNING_DISABLE_CLANG("-Wattributes")
+QT_WARNING_DISABLE_INTEL(2621)
+
 extern const char qt_core_interpreter[] __attribute__((section(".interp")))
     = ELF_INTERPRETER;
 
-extern "C" void qt_core_boilerplate();
+extern "C" void qt_core_boilerplate() __attribute__((force_align_arg_pointer));
 void qt_core_boilerplate()
 {
     printf("This is the QtCore library version " QT_BUILD_STR "\n"