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This reverts commit 4361a502255e409f04c9325ef73f3cd10f9cafdb.
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In order to remove libstdc++ completely, we need to give up on their
implementation of abi::__cxa_demangle. The demangler logic will actually
have to be quite complex, and included in both the kernel and userspace.
A definite fixme for the future, to parse the mangled names into real
deal names.
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StringView::to_string() was added in 917ccb1 but not actually used
anywhere yet.
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String.h no longer pulls in StringView.h. We do this by moving a bunch
of String functions out-of-line.
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This will need some refinement, but basically since we build LibC
during the toolchain build, we don't have libstdc++ headers yet.
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This didn't work at some point, but now it apparently works again. :^)
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As suggested by Joshua, this commit adds the 2-clause BSD license as a
comment block to the top of every source file.
For the first pass, I've just added myself for simplicity. I encourage
everyone to add themselves as copyright holders of any file they've
added or modified in some significant way. If I've added myself in
error somewhere, feel free to replace it with the appropriate copyright
holder instead.
Going forward, all new source files should include a license header.
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It was possible to craft a custom ELF executable that when symbolicated
would cause the kernel to read from user-controlled addresses anywhere
in memory. You could then fetch this memory via /proc/PID/stack
We fix this by making ELFImage hand out StringView rather than raw
const char* for symbol names. In case a symbol offset is outside the
ELF image, you get a null StringView. :^)
Test: Kernel/elf-symbolication-kernel-read-exploit.cpp
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For some reason, the default CXXFLAGS and such don't get us the
__cxa_demangle symbol in userland.
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I broke this while implementing module linking. Also move the actual
demangling work to AK, in AK::demangle(const char*)
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