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Build a separate libsupc++ for the kernel with correct flags.

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Kernel mode code on x86_64 needs to be built with -mno-red-zone as
interrupts would corrupt the red zone if it were in use. However, the
kernel is linked with libsupc++, which was not compiled with
-mno-red-zone. If an interrupt occurred in libsupc++ code the red zone
would get corrupted. This was causing random panics, particularly under
heavy system load. Therefore, on x86_64 a separate build of libsupc++
with -mno-red-zone is now done for the kernel to use. Note: this commit
will require a rerun of configure and rebuild of cross tools.
This commit is contained in:
Alex Smith
2012-08-16 13:57:04 +01:00
parent 294818c5fd
commit c864ba1a2d
10 changed files with 44 additions and 11 deletions
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build/jam/KernelRules
+2 -2
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@@ -48,9 +48,9 @@ rule KernelLd
# libsupc++ is opt-out.
local libs ;
if ! [ on $(1) return HAIKU_NO_LIBSUPC++ ] {
libs += $(TARGET_STATIC_LIBSUPC++) ;
libs += $(TARGET_KERNEL_LIBSUPC++) ;
}
LINKLIBS on $(1) = $(libs) $(TARGET_GCC_LIBGCC) ;
LINKLIBS on $(1) = $(libs) $(TARGET_KERNEL_LIBGCC) ;
# TODO: Do we really want to invoke SetupKernel here? The objects should
# have been compiled with KernelObjects anyway, so we're doing that twice.