Function exec_trampoline 

pub unsafe fn exec_trampoline(
    mail: i32,
    shim: *const c_char,
    argv: *const *const c_char,
    envp: *const *const c_char,
) -> !

Execs the trampoline in the first tracee, through the allow gate, with the mailbox descriptor it inherited kept open for it. Allocation free, for use between fork and execve.

Arguments

• mail - The mailbox descriptor.
• shim - Path of the trampoline from the kernel working directory.
• argv - The command’s argument vector.
• envp - Its environment.

Safety

The pointers must be valid for execve. Exits the process, with 127 when the trampoline is missing and 126 for any other failure.