Constant SYS_PROC_EXECVE 

pub const SYS_PROC_EXECVE: usize = 315; // 315usize

Execute a new program, replacing the current process image.

• path_ptr: pointer to the null-terminated path string
• path_len: length of the path string
• argv_ptr: pointer to the argument array
• envp_ptr: pointer to the environment array

This syscall never returns on success. The current process image is replaced with the new ELF binary.