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hv.py: Map only from guest base to RAM top to guest

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This keeps the hypervisor safe, in theory.

Signed-off-by: Hector Martin <marcan@marcan.st>
This commit is contained in:
Hector Martin 2021-05-09 03:21:27 +09:00
parent a6287ae68d
commit 9a7a5c86a5
1 changed files with 6 additions and 2 deletions
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8
proxyclient/hv.py
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@ -86,7 +86,6 @@ class HV:
self.iface.set_handler(START.EXCEPTION_LOWER, EXC.SERROR, self.handle_exception)
self.map_hw(0x2_00000000, 0x2_00000000, 0x5_00000000)
self.map_hw(0x8_00000000, 0x8_00000000, 0x4_00000000)
self.p.hv_map_vuart(0x2_35200000)
@ -143,12 +142,17 @@ class HV:
tc_base = guest_base
guest_base += align(tc_size)
self.guest_base = guest_base
mem_top = self.u.ba.phys_base + self.u.ba.mem_size
mem_size = mem_top - phys_base
print(f"Physical memory base: 0x{phys_base:x}")
print(f"Physical memory: 0x{phys_base:x} .. 0x{mem_top:x}")
print(f"Guest region start: 0x{guest_base:x}")
self.entry = macho.entry - macho.vmin + guest_base
print(f"Mapping guest physical memory...")
self.map_hw(phys_base, phys_base, self.u.ba.mem_size_actual - phys_base + 0x800000000)
print(f"Loading kernel image (0x{len(image):x} bytes)...")
self.u.compressed_writemem(guest_base, image, True)
self.p.dc_cvau(guest_base, len(image))