From: "Laszlo Ersek" <lersek@redhat.com>
To: Jaben Carsey <jaben.carsey@intel.com>, Ray Ni <ray.ni@intel.com>,
Zhichao Gao <zhichao.gao@intel.com>
Cc: edk2-devel-groups-io <devel@edk2.groups.io>
Subject: Re: [edk2-devel] [PATCH 32/35] ShellPkg/UefiShellLib: clarify workaround for unfixable EdkShell bug
Date: Thu, 26 Sep 2019 14:47:17 +0200 [thread overview]
Message-ID: <4fc048a2-ccbd-7f32-a51b-bf065230d3f6@redhat.com> (raw)
In-Reply-To: <20190917194935.24322-33-lersek@redhat.com>
Jaben, Ray, Zhichao,
can one of you guys please review this patch?
Thanks
Laszlo
On 09/17/19 21:49, Laszlo Ersek wrote:
> The EDK 1 Shell (available at <https://github.com/tianocore/edk-Shell>)
> has a bug in its EFI_SHELL_ENVIRONMENT2.Execute() implementation that
> edk2's UefiShellLib has no choice but to work around.
>
> Improve the explanation in the code. Also, document the implicit
> EFI_HANDLE -> (EFI_HANDLE*) conversion, which happens implicitly after
> dereferencing ParentHandle, with an explicit cast.
>
> In practice, this patch is a no-op.
>
> Cc: Jaben Carsey <jaben.carsey@intel.com>
> Cc: Ray Ni <ray.ni@intel.com>
> Cc: Zhichao Gao <zhichao.gao@intel.com>
> Signed-off-by: Laszlo Ersek <lersek@redhat.com>
> ---
>
> Notes:
> build-tested only
>
> ShellPkg/Library/UefiShellLib/UefiShellLib.c | 22 ++++++++++++++++++--
> 1 file changed, 20 insertions(+), 2 deletions(-)
>
> diff --git a/ShellPkg/Library/UefiShellLib/UefiShellLib.c b/ShellPkg/Library/UefiShellLib/UefiShellLib.c
> index 835d0f88ca74..9f07a58eb23d 100644
> --- a/ShellPkg/Library/UefiShellLib/UefiShellLib.c
> +++ b/ShellPkg/Library/UefiShellLib/UefiShellLib.c
> @@ -1291,9 +1291,27 @@ ShellExecute (
> if (mEfiShellEnvironment2 != NULL) {
> //
> // Call EFI Shell version.
> - // Due to oddity in the EFI shell we want to dereference the ParentHandle here
> //
> - CmdStatus = (mEfiShellEnvironment2->Execute(*ParentHandle,
> + // Due to an unfixable bug in the EdkShell implementation, we must
> + // dereference "ParentHandle" here:
> + //
> + // 1. The EFI shell installs the EFI_SHELL_ENVIRONMENT2 protocol,
> + // identified by gEfiShellEnvironment2Guid.
> + // 2. The Execute() member function takes "ParentImageHandle" as first
> + // parameter, with type (EFI_HANDLE*).
> + // 3. In the EdkShell implementation, SEnvExecute() implements the
> + // Execute() member function. It passes "ParentImageHandle" correctly to
> + // SEnvDoExecute().
> + // 4. SEnvDoExecute() takes the (EFI_HANDLE*), and passes it directly --
> + // without de-referencing -- to the HandleProtocol() boot service.
> + // 5. But HandleProtocol() takes an EFI_HANDLE.
> + //
> + // Therefore we must
> + // - de-reference "ParentHandle" here, to mask the bug in
> + // SEnvDoExecute(), and
> + // - pass the resultant EFI_HANDLE as an (EFI_HANDLE*).
> + //
> + CmdStatus = (mEfiShellEnvironment2->Execute((EFI_HANDLE *)*ParentHandle,
> CommandLine,
> Output));
> //
>
next prev parent reply other threads:[~2019-09-26 12:47 UTC|newest]
Thread overview: 155+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-17 19:49 [PATCH 00/35] edk2: clean up the usage of standardized (VOID*) typedefs Laszlo Ersek
2019-09-17 19:49 ` [PATCH 01/35] DO NOT APPLY: edk2: turn standard handle types into pointers to non-VOID Laszlo Ersek
2019-09-17 20:06 ` [edk2-devel] " Ni, Ray
2019-09-17 20:22 ` Andrew Fish
2019-09-17 20:28 ` Ni, Ray
2019-09-17 21:07 ` Andrew Fish
2019-09-17 21:11 ` Michael D Kinney
2019-09-18 8:41 ` Laszlo Ersek
2019-09-18 15:16 ` Michael D Kinney
2019-09-18 17:41 ` Laszlo Ersek
2019-09-18 15:55 ` Andrew Fish
2019-09-18 16:16 ` Leif Lindholm
2019-09-18 17:45 ` Laszlo Ersek
2019-09-18 8:36 ` Laszlo Ersek
2019-09-17 19:49 ` [PATCH 02/35] EmbeddedPkg: add missing EFIAPI calling convention specifiers Laszlo Ersek
2019-09-18 17:41 ` Leif Lindholm
2019-09-17 19:49 ` [PATCH 03/35] EmbeddedPkg/AndroidFastbootTransportTcpDxe: fix DestroyChild() call Laszlo Ersek
2019-09-24 10:47 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-26 12:12 ` Laszlo Ersek
2019-09-26 12:16 ` Ard Biesheuvel
2019-09-17 19:49 ` [PATCH 04/35] EmbeddedPkg/Universal/MmcDxe: "fix" CloseProtocol() call in BindingStop() Laszlo Ersek
2019-09-25 15:52 ` Ard Biesheuvel
2019-09-17 19:49 ` [PATCH 05/35] EmulatorPkg/DxeTimerLib: drop superfluous cast Laszlo Ersek
2019-09-17 20:02 ` Ni, Ray
2019-09-20 15:00 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-17 19:49 ` [PATCH 06/35] EmulatorPkg: stop abusing EFI_HANDLE for keystroke notify registration Laszlo Ersek
2019-09-17 20:01 ` Ni, Ray
2019-09-24 10:44 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-17 19:49 ` [PATCH 07/35] MdeModulePkg: fix cast in GetModuleInfoFromHandle() calls Laszlo Ersek
2019-09-19 1:46 ` Dandan Bi
2019-09-24 10:43 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-17 19:49 ` [PATCH 08/35] MdeModulePkg/UefiHiiLib: stop using EFI_HANDLE in place of EFI_HII_HANDLE Laszlo Ersek
2019-09-19 1:46 ` Dandan Bi
2019-09-24 10:49 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-17 19:49 ` [PATCH 09/35] MdeModulePkg: stop abusing EFI_EVENT for protocol notify registration Laszlo Ersek
2019-09-17 20:17 ` Ni, Ray
2019-09-25 16:02 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-26 12:10 ` Laszlo Ersek
2019-09-17 19:49 ` [PATCH 10/35] MdeModulePkg/PlatformVarCleanupLib: fix HiiConstructConfigHdr() call Laszlo Ersek
2019-09-23 11:45 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-24 17:28 ` Laszlo Ersek
2019-09-17 19:49 ` [PATCH 11/35] MdeModulePkg: document workaround for EFI_RUNTIME_EVENT_ENTRY PI spec bug Laszlo Ersek
2019-09-19 1:47 ` Dandan Bi
2019-09-17 19:49 ` [PATCH 12/35] MdeModulePkg: stop abusing EFI_HANDLE for keystroke notify registration Laszlo Ersek
2019-09-17 20:16 ` [edk2-devel] " Ni, Ray
2019-09-19 1:47 ` Dandan Bi
2019-09-24 10:54 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-17 19:49 ` [PATCH 13/35] MdeModulePkg: PEI Core: clean up "AprioriFile" handling in FindFileEx() Laszlo Ersek
2019-09-19 1:46 ` Dandan Bi
2019-09-24 15:40 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-17 19:49 ` [PATCH 14/35] MdeModulePkg: fix UninstallMultipleProtocolInterfaces() calls Laszlo Ersek
2019-09-17 20:16 ` Ni, Ray
2019-09-17 19:49 ` [PATCH 15/35] MdeModulePkg/PiSmmCore: make type punning consistent Laszlo Ersek
2019-09-18 2:38 ` Dong, Eric
2019-09-17 19:49 ` [PATCH 16/35] MdeModulePkg/S3SaveState: cast Position for S3BootScriptLib explicitly Laszlo Ersek
2019-09-19 1:47 ` [edk2-devel] " Dandan Bi
2019-09-17 19:49 ` [PATCH 17/35] MdePkg/DxeServicesLib: remove bogus cast Laszlo Ersek
2019-09-18 4:47 ` [edk2-devel] " Liming Gao
2019-09-24 15:38 ` Philippe Mathieu-Daudé
2019-09-17 19:49 ` [PATCH 18/35] NetworkPkg/DxeNetLib: fix type typo in NetLibGetMacAddress() Laszlo Ersek
2019-09-24 11:00 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-10-08 0:32 ` Siyuan, Fu
2019-10-08 23:36 ` Laszlo Ersek
2019-09-26 12:14 ` Laszlo Ersek
2019-10-03 11:05 ` Laszlo Ersek
2019-10-04 19:18 ` Laszlo Ersek
2019-10-07 18:15 ` Michael D Kinney
2019-09-17 19:49 ` [PATCH 19/35] NetworkPkg: fix CloseProtocol & UninstallMultipleProtocolInterfaces calls Laszlo Ersek
2019-09-26 12:14 ` [edk2-devel] " Laszlo Ersek
2019-09-26 12:42 ` Philippe Mathieu-Daudé
2019-09-30 20:16 ` Laszlo Ersek
2019-10-01 7:18 ` Philippe Mathieu-Daudé
2019-09-27 0:03 ` Siyuan, Fu
2019-09-17 19:49 ` [PATCH 20/35] NetworkPkg/Ip4Dxe: fix NetLibDestroyServiceChild() call Laszlo Ersek
2019-09-23 16:03 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-27 0:04 ` Siyuan, Fu
2019-09-26 12:14 ` Laszlo Ersek
2019-09-17 19:49 ` [PATCH 21/35] NetworkPkg/TcpDxe: fix SockFreeFoo() parameter list Laszlo Ersek
2019-09-23 15:09 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-26 12:14 ` Laszlo Ersek
2019-09-27 0:06 ` Siyuan, Fu
2019-09-17 19:49 ` [PATCH 22/35] OvmfPkg/XenBusDxe: fix UninstallMultipleProtocolInterfaces() call Laszlo Ersek
2019-09-18 9:32 ` Anthony PERARD
2019-09-18 10:30 ` Julien Grall
2019-09-23 15:03 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-17 19:49 ` [PATCH 23/35] OvmfPkg/VirtioNetDxe: fix SignalEvent() call Laszlo Ersek
2019-09-20 14:59 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-26 12:16 ` Laszlo Ersek
2019-09-26 12:17 ` Ard Biesheuvel
2019-09-17 19:49 ` [PATCH 24/35] OvmfPkg/PlatformDxe: fix EFI_HII_HANDLE parameters of internal functions Laszlo Ersek
2019-09-20 14:56 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-25 15:57 ` Ard Biesheuvel
2019-09-17 19:49 ` [PATCH 25/35] OvmfPkg/VideoDxe: document EFI_EDID_OVERRIDE_PROTOCOL.GetEdid() call Laszlo Ersek
2019-09-23 15:59 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-26 12:43 ` Laszlo Ersek
2019-10-04 20:01 ` Laszlo Ersek
2019-09-17 19:49 ` [PATCH 26/35] SecurityPkg: fix UninstallMultipleProtocolInterfaces() calls Laszlo Ersek
2019-09-23 9:55 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-26 12:45 ` Laszlo Ersek
2019-10-03 11:06 ` Laszlo Ersek
2019-10-04 0:05 ` Yao, Jiewen
2019-10-04 13:14 ` Zhang, Chao B
2019-10-04 18:15 ` Laszlo Ersek
2019-10-05 14:28 ` Zhang, Chao B
2019-10-07 18:14 ` Laszlo Ersek
2019-09-17 19:49 ` [PATCH 27/35] SecurityPkg: stop abusing EFI_EVENT for protocol notify registration Laszlo Ersek
2019-09-23 9:56 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-26 12:46 ` Laszlo Ersek
2019-10-03 11:06 ` Laszlo Ersek
2019-10-04 0:05 ` Yao, Jiewen
2019-10-04 13:16 ` Zhang, Chao B
2019-10-05 14:28 ` Zhang, Chao B
2019-09-17 19:49 ` [PATCH 28/35] ShellPkg/UefiShellDriver1CommandsLib: fix parameter list typo Laszlo Ersek
2019-09-24 15:44 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-26 2:46 ` Gao, Zhichao
2019-09-17 19:49 ` [PATCH 29/35] ShellPkg: stop using EFI_HANDLE in place of EFI_HII_HANDLE Laszlo Ersek
2019-09-25 18:04 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-26 11:48 ` Laszlo Ersek
2019-09-26 2:43 ` Gao, Zhichao
2019-09-17 19:49 ` [PATCH 30/35] ShellPkg: stop taking EFI_HANDLE in place of SHELL_FILE_HANDLE Laszlo Ersek
2019-09-23 9:58 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-26 2:53 ` Gao, Zhichao
2019-09-26 12:08 ` Laszlo Ersek
2019-09-26 14:43 ` Gao, Zhichao
2019-09-30 19:52 ` Laszlo Ersek
2019-09-17 19:49 ` [PATCH 31/35] ShellPkg/UefiShellDebug1CommandsLib: fix ShellCloseFile() call Laszlo Ersek
2019-09-23 10:01 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-23 14:28 ` Carsey, Jaben
2019-09-24 1:18 ` Gao, Zhichao
2019-09-17 19:49 ` [PATCH 32/35] ShellPkg/UefiShellLib: clarify workaround for unfixable EdkShell bug Laszlo Ersek
2019-09-26 12:47 ` Laszlo Ersek [this message]
2019-09-26 14:05 ` [edk2-devel] " Gao, Zhichao
2019-09-26 14:58 ` Carsey, Jaben
2019-09-17 19:49 ` [PATCH 33/35] StandaloneMmPkg/Core: stop abusing EFI_HANDLE for FwVolHeader tracking Laszlo Ersek
2019-09-26 12:48 ` [edk2-devel] " Laszlo Ersek
2019-10-03 11:10 ` Laszlo Ersek
2019-10-03 11:17 ` Achin Gupta
2019-10-04 0:10 ` Yao, Jiewen
2019-10-04 14:53 ` Achin Gupta
2019-09-17 19:49 ` [PATCH 34/35] UefiPayloadPkg/BlSupportPei: fix MMCONFIG assignment from XSDT Laszlo Ersek
2019-09-23 2:30 ` Guo Dong
2019-09-26 13:17 ` [edk2-devel] " Philippe Mathieu-Daudé
2019-09-17 19:49 ` [PATCH 35/35] UefiPayloadPkg/BlSupportDxe: fix ReserveResourceInGcd() calls Laszlo Ersek
2019-09-23 2:28 ` [edk2-devel] " Guo Dong
2019-09-23 15:08 ` Philippe Mathieu-Daudé
2019-09-23 16:02 ` Guo Dong
2019-09-23 16:04 ` Philippe Mathieu-Daudé
2019-09-24 17:29 ` Laszlo Ersek
2019-09-19 0:32 ` [edk2-devel] [PATCH 00/35] edk2: clean up the usage of standardized (VOID*) typedefs Wu, Hao A
2019-09-23 16:27 ` Marvin Häuser
2019-09-24 20:26 ` Laszlo Ersek
2019-09-25 8:13 ` Marvin Häuser
2019-09-25 15:54 ` Laszlo Ersek
2019-10-08 23:49 ` Laszlo Ersek
2019-10-09 9:50 ` Laszlo Ersek
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