用 riscv64- Linux -gnu-gcc 编译的 c 文件为啥能在 x8664 下运行？

就一个简单的 c 程序:

#include <stdio.h> int main() { printf("Hello, World\n"); } 

使用如下命令编译：

riscv64-linux-gnu-gcc --static hello.c -o hello_riscv64 

居然可以直接运行

> ./hello_riscv64 Hello, World 

使用 qemu 也能运行：

> qemu-riscv64-static hello_riscv64 Hello, World 

readelf 结果：

> readelf -h hello_riscv64 ELF Header: Magic: 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 Class: ELF64 Data: 2's complement, little endian Version: 1 (current) OS/ABI: UNIX - System V ABI Version: 0 Type: EXEC (Executable file) Machine: RISC-V Version: 0x1 Entry point address: 0x1054c Start of program headers: 64 (bytes into file) Start of section headers: 501880 (bytes into file) Flags: 0x5, RVC, double-float ABI Size of this header: 64 (bytes) Size of program headers: 56 (bytes) Number of program headers: 7 Size of section headers: 64 (bytes) Number of section headers: 28 Section header string table index: 27