3rd-party/linux-kernel-module-cheat
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c++ baremetal hello world move to issue tracker

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Ciro Santilli 六四事件 法轮功
2020-03-23 07:17:11 +00:00
parent 96838ee9e5
commit 5ef9d3d1c9
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README.adoc
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@@ -19589,48 +19589,7 @@ with the prebuilt toolchain, and I'm lazy to debug.
[[baremetal-cpp]]
=== Baremetal C++
TODO not working as of 8825222579767f2ee7e46ffd8204b9e509440759 + 1. Not yet properly researched / reported upstream yet.
Should not be hard in theory since `libstdc++` is just part of GCC, as shown at: https://stackoverflow.com/questions/21872229/how-to-edit-and-re-build-the-gcc-libstdc-c-standard-library-source/51946224#51946224
To test it out, I first hack link:common.py[] to enable `C++`:
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consts['baremetal_build_in_exts'] = consts['build_in_exts']
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and then I hack link:userland/arch/aarch64/inline_asm/multiline.cpp[] to consist only of an empty main:
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int main() {}
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then for example:
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./build-baremetal --arch aarch64
./run --arch aarch64 --baremetal userland/arch/aarch64/inline_asm/multiline.cpp
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fails with:
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rom: requested regions overlap (rom dtb. free=0x00000000000000a0, addr=0x0000000000000000)
qemu-system-aarch64: rom check and register reset failed
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and the gem5 build fails completely:
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./build-baremetal --arch aarch64 --emulator gem5 userland/arch/aarch64/inline_asm/multiline.cpp
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fails with:
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/tmp/ccFd2YIB.o:(.eh_frame+0x1c): relocation truncated to fit: R_AARCH64_PREL32 against `.text'
collect2: error: ld returned 1 exit status
....
Didn't get it working, traking at: https://github.com/cirosantilli/linux-kernel-module-cheat/issues/119
=== GDB builtin CPU simulator