ipxe.lkrn does not detect L2 network interface in MBR

[fxc6923683@163.com]

Hello,

I purpose to set pxe in grub,then MBR boot auto pxe after reboot os.

I have followed online instructions to download latest iPXE from git and run "make" which finished successfuly.

My attempt with undionly.ipxe for PXE was successful and acomplished what I expected.

Next logical step would be to add ipxe.lkrn to my grub configuration file which I did and ipxe.lkrn loads in MBR but it does not detect network interface.

I have two nics to be set pxe in BIOS, set two nics pxe are enable in BIOS. MBR boot from ipxe.lkrn may was successful.But I set one nic pxe is enable in BIOS. It does not detect network interface.

I trace to the code for this problem, I find the code is

Code:

    /* Call loader */
    undi_loader_entry = undirom->loader_entry;
    __asm__ __volatile__ ( REAL_CODE ( "pushl %%ebp\n\t" /* gcc bug */
                       "pushw %%ds\n\t"
                       "pushw %%ax\n\t"
                       "lcall *undi_loader_entry\n\t"
                       "popl %%ebp\n\t" /* discard */
                       "popl %%ebp\n\t" /* gcc bug */ )
                   : "=a" ( exit )
                   : "a" ( __from_data16 ( &undi_loader ) )
                   : "ebx", "ecx", "edx", "esi", "edi" );

    if ( exit != PXENV_EXIT_SUCCESS ) {
        /* Clear entry point */
        memset ( &undi_loader_entry, 0, sizeof ( undi_loader_entry ) );

        rc = -EUNDILOAD ( undi_loader.Status );
        DBGC ( undi, "UNDI %p loader failed: %s\n",
               undi, strerror ( rc ) );
        return rc;
    }

Well it is a strange situation that iPXE on the PXE finds and configures network interface successfully but ipxe.lkrn does not detect network interface.