https://github.com/teverett/arm_clang_cpp_example
An example of booting an ARM processor to C++, compiled with Clang
https://github.com/teverett/arm_clang_cpp_example
Last synced: over 1 year ago
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An example of booting an ARM processor to C++, compiled with Clang
- Host: GitHub
- URL: https://github.com/teverett/arm_clang_cpp_example
- Owner: teverett
- Created: 2017-03-18T20:49:56.000Z (over 9 years ago)
- Default Branch: master
- Last Pushed: 2020-06-08T03:49:48.000Z (about 6 years ago)
- Last Synced: 2025-01-24T12:26:54.599Z (over 1 year ago)
- Language: Shell
- Homepage:
- Size: 61.5 KB
- Stars: 0
- Watchers: 4
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# arm_clang_cpp_example
An example of creating a custom ARM toolchain based on Clang and booting an ARM processor to C++. This example shows:
* Building a ARM cross-compile toolchain using GNU BinUtils and Clang
* Booting the ARM chip, and running C++ code
* Custom crt0 which initializes and de-initializes static data
* C++ class instances allocated on the heap
* C++ global class instances
* Zero-ing the .bss and heap
* GNU LD link script
## Toolchain
This example uses the toolchain built by
* [GNU Binutils](https://www.gnu.org/software/binutils/) - 2.34
* [GNU Make](https://www.gnu.org/software/make/) - 3.82
* [CMake](https://cmake.org/) - 3.17.2
* [Clang](https://clang.llvm.org/) - 10.0.0
To build the toolchain
cd toolchain
sh build_toolchain.sh
### The toolchain supports these targets:
* arm-none-eabi
* arm-none-elf
* mips-none-elf
* mipsel-none-elf
* mips64-none-elf
* mips64el-none-elf
* sparc-none-elf
* avr-none-elf
## Building the example
The provided MakeFile supports assembler, C, C++ and ObjectiveC source and targets the arm-none-elf platform
make
## Running the example
make run
This requires that your system have `qemu-system-arm` installed
### Example Output
qemu-system-arm -M versatilepb -m 128M -nographic -kernel kernel.bin
crt.c _init
Obj1 int ctor with value: 12
Hello from Clang
new: 74168 size: 1
Kernel::ctor
Kernel::run
__startup_begin: 65536
__text_begin: 65552
__bss_begin: 68656
__data_begin: 69688
__rodata_begin: 69692
__init_array_begin: 70060
__fini_array_begin: 70064
__stack_top: 74168
__stack_size: 4096
__heap_bottom: 74168
__heap_size: 65536
new: 74268 size: 4
Obj1 int ctor with value: 77
77
Obj1 dtor with value: 77
delete: 74268
12
Kernel::dtor
delete: 74168
Obj1 dtor with value: 12
crt.c _fini
QEMU: Terminated