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tools/linux.py: Fix u-boot boot and add support for booting EFI stubs via u-boot #537

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Merged
jannau merged 3 commits into from
Feb 6, 2026
Merged

tools/linux.py: Fix u-boot boot and add support for booting EFI stubs via u-boot #537

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8053e88
tools/linux.py: Fix u-boot booting with standard boot
jannau Jan 23, 2026
46f46a3
tools/linux.py: Add option to boot EFI stub linux payloads via u-boot
jannau Jan 23, 2026
53b26dd
tools/linux.py: Speed u-boot boot up
jannau Jan 23, 2026
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31 changes: 24 additions & 7 deletions proxyclient/tools/linux.py
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Original file line number Diff line number Diff line change
Expand Up @@ -14,14 +14,20 @@
parser.add_argument('-b', '--bootargs', type=str, metavar='"boot arguments"')
parser.add_argument('-t', '--tty', type=str)
parser.add_argument('-u', '--u-boot', type=pathlib.Path, help="load u-boot before linux")
parser.add_argument('-E', '--efi', action="store_true", help="payload is EFI stub (requires u-boot)")
parser.add_argument('-T', '--tso', action="store_true", help="enable TSO")
args = parser.parse_args()

from m1n1.setup import *

if args.efi and args.u_boot is None:
raise Exception("Booting EFI stubs requires u-boot.")

if args.compression == 'auto':
suffix = args.payload.suffix
if suffix == '.gz':
if args.efi:
args.compression = 'none'
elif suffix == '.gz':
args.compression = 'gz'
elif suffix == '.xz':
args.compression = 'xz'
Expand Down Expand Up @@ -81,20 +87,31 @@
uboot_addr = u.memalign(2*1024*1024, len(uboot))
print("Loading u-boot to 0x%x..." % uboot_addr)

bootenv_start = uboot.find(b"bootcmd=run distro_bootcmd")
bootenv_start = uboot.find(b"bootcmd=bootflow scan -b")
bootenv_len = uboot[bootenv_start:].find(b"\x00\x00")
bootenv_old = uboot[bootenv_start:bootenv_start+bootenv_len]
bootenv = str(bootenv_old, "ascii").split("\x00")
bootenv = list(filter(lambda x: not (x.startswith("baudrate") or x.startswith("boot_") or x.startswith("distro_bootcmd")), bootenv))

if initramfs is not None:
bootcmd = "distro_bootcmd=booti 0x%x 0x%x:0x%x $fdtcontroladdr" % (kernel_base, initramfs_base, initramfs_size)
bootenv = list(filter(lambda x: not (
x.startswith("baudrate") or
x.startswith("boot_") or
x.startswith("bootdelay=") or
x.startswith("preboot=") or
x.startswith("bootcmd")
), bootenv))

if args.efi and initramfs is not None:
bootcmd = "bootcmd=bootefi 0x%x:0x%x 0x%x:0x%x $fdtcontroladdr" % (kernel_base, kernel_size, initramfs_base, initramfs_size)
elif initramfs is not None:
bootcmd = "bootcmd=booti 0x%x 0x%x:0x%x $fdtcontroladdr" % (kernel_base, initramfs_base, initramfs_size)
elif args.efi:
bootcmd = "bootcmd=bootefi 0x%x:0x%x $fdtcontroladdr" % (kernel_base, kernel_size)
else:
bootcmd = "distro_bootcmd=booti 0x%x - $fdtcontroladdr" % (kernel_base)
bootcmd = "bootcmd=booti 0x%x - $fdtcontroladdr" % (kernel_base)

if tty_dev is not None:
bootenv.append("baudrate=%d" % tty_dev.baudrate)
bootenv.append(bootcmd)
bootenv.append("bootdelay=0")
if args.bootargs is not None:
bootenv.append("bootargs=" + args.bootargs)

Expand Down