From ae87440578369456b55e54125e101d27c332bc5a Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Wed, 18 May 2016 00:54:47 +0200 Subject: [PATCH] efi_loader: Clean up system table on exit We put the system table into our runtime services data section so that payloads may still access it after exit_boot_services. However, most fields in it are quite useless once we're in that state, so let's just patch them out. With this patch we don't get spurious warnings when running EFI binaries anymore. Signed-off-by: Alexander Graf --- lib/efi_loader/efi_runtime.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/lib/efi_loader/efi_runtime.c b/lib/efi_loader/efi_runtime.c index 3ee27ca9cc..11d01268d8 100644 --- a/lib/efi_loader/efi_runtime.c +++ b/lib/efi_loader/efi_runtime.c @@ -125,6 +125,22 @@ static const struct efi_runtime_detach_list_struct efi_runtime_detach_list[] = { /* RTC accessors are gone */ .ptr = &efi_runtime_services.get_time, .patchto = &efi_device_error, + }, { + /* Clean up system table */ + .ptr = &systab.con_in, + .patchto = NULL, + }, { + /* Clean up system table */ + .ptr = &systab.con_out, + .patchto = NULL, + }, { + /* Clean up system table */ + .ptr = &systab.std_err, + .patchto = NULL, + }, { + /* Clean up system table */ + .ptr = &systab.boottime, + .patchto = NULL, }, }; -- 2.39.5