From: Laszlo Ersek <lersek@redhat.com>
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>,
edk2-devel@ml01.01.org, leif.lindholm@linaro.org
Subject: Re: [PATCH 4/6] ArmPkg/SemihostFs: eliminate calls to deprecated string functions
Date: Tue, 25 Oct 2016 13:11:14 +0200 [thread overview]
Message-ID: <07562096-0bd6-30b7-0f4d-f01ef8c84afb@redhat.com> (raw)
In-Reply-To: <1477325206-24646-5-git-send-email-ard.biesheuvel@linaro.org>
On 10/24/16 18:06, Ard Biesheuvel wrote:
> Remove calls to deprecated string functions like AsciiStrCpy() and
> UnicodeStrToAsciiStr()
>
> Contributed-under: TianoCore Contribution Agreement 1.0
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> ---
> ArmPkg/Filesystem/SemihostFs/Arm/SemihostFs.c | 20 ++++++++++++--------
> 1 file changed, 12 insertions(+), 8 deletions(-)
>
> diff --git a/ArmPkg/Filesystem/SemihostFs/Arm/SemihostFs.c b/ArmPkg/Filesystem/SemihostFs/Arm/SemihostFs.c
> index 6efdad9ebcce..e79b5cc5cf39 100644
> --- a/ArmPkg/Filesystem/SemihostFs/Arm/SemihostFs.c
> +++ b/ArmPkg/Filesystem/SemihostFs/Arm/SemihostFs.c
> @@ -207,11 +207,12 @@ FileOpen (
> return EFI_WRITE_PROTECTED;
> }
>
> - AsciiFileName = AllocatePool (StrLen (FileName) + 1);
> + Length = StrLen (FileName) + 1;
> + AsciiFileName = AllocatePool (Length);
> if (AsciiFileName == NULL) {
> return EFI_OUT_OF_RESOURCES;
> }
> - UnicodeStrToAsciiStr (FileName, AsciiFileName);
> + UnicodeStrToAsciiStrS (FileName, AsciiFileName, Length);
>
> // Opening '/', '\', '.', or the NULL pathname is trying to open the root directory
> if ((AsciiStrCmp (AsciiFileName, "\\") == 0) ||
Sort of muddles the purpose of the preexistent Length variable, but it's
manageable I think.
> @@ -463,7 +464,7 @@ FileDelete (
> NameSize = AsciiStrLen (Fcb->FileName);
> FileName = AllocatePool (NameSize + 1);
>
> - AsciiStrCpy (FileName, Fcb->FileName);
> + AsciiStrCpyS (FileName, NameSize + 1, Fcb->FileName);
>
> // Close the file if it's open. Disregard return status,
> // since it might give an error if the file isn't open.
Haha, this uses exactly the opposite meanings for Size and Length of
what I do :) Okay.
> @@ -828,8 +829,10 @@ GetFilesystemInfo (
> EFI_FILE_SYSTEM_INFO *Info;
> EFI_STATUS Status;
> UINTN ResultSize;
> + UINTN StringSize;
>
> - ResultSize = SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize (mSemihostFsLabel);
> + StringSize = StrSize (mSemihostFsLabel);
> + ResultSize = SIZE_OF_EFI_FILE_SYSTEM_INFO + StringSize;
>
> if (*BufferSize >= ResultSize) {
> ZeroMem (Buffer, ResultSize);
> @@ -843,7 +846,7 @@ GetFilesystemInfo (
> Info->FreeSpace = 0;
> Info->BlockSize = 0;
>
> - StrCpy (Info->VolumeLabel, mSemihostFsLabel);
> + StrCpyS (Info->VolumeLabel, StringSize, mSemihostFsLabel);
> } else {
> Status = EFI_BUFFER_TOO_SMALL;
> }
This is wrong:
- StrSize() "Returns the size of a Null-terminated Unicode string in
bytes, including the Null terminator",
- but for StrCpyS(), "DestMax" is "The maximum number of Destination
Unicode char, including terminating null char."
I suggest to use CopyMem() (rather than divide).
> @@ -903,7 +906,7 @@ FileGetInfo (
> ResultSize = StrSize (mSemihostFsLabel);
>
> if (*BufferSize >= ResultSize) {
> - StrCpy (Buffer, mSemihostFsLabel);
> + StrCpyS (Buffer, *BufferSize, mSemihostFsLabel);
> Status = EFI_SUCCESS;
> } else {
> Status = EFI_BUFFER_TOO_SMALL;
Also wrong; please use CopyMem().
> @@ -963,11 +966,12 @@ SetFileInfo (
> return EFI_ACCESS_DENIED;
> }
>
> - AsciiFileName = AllocatePool (StrLen (Info->FileName) + 1);
> + Length = StrLen (Info->FileName) + 1;
> + AsciiFileName = AllocatePool (Length);
> if (AsciiFileName == NULL) {
> return EFI_OUT_OF_RESOURCES;
> }
> - UnicodeStrToAsciiStr (Info->FileName, AsciiFileName);
> + UnicodeStrToAsciiStrS (Info->FileName, AsciiFileName, Length);
>
> FileSizeIsDifferent = (Info->FileSize != Fcb->Info.FileSize);
> FileNameIsDifferent = (AsciiStrCmp (AsciiFileName, Fcb->FileName) != 0);
>
This hunk looks okay.
Thanks
Laszlo
next prev parent reply other threads:[~2016-10-25 11:11 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-24 16:06 [PATCH 0/6] ArmPkg: eliminate calls to deprecated functions Ard Biesheuvel
2016-10-24 16:06 ` [PATCH 1/6] ArmPkg: add missing components Ard Biesheuvel
2016-10-25 12:51 ` Leif Lindholm
2016-10-24 16:06 ` [PATCH 2/6] ArmPkg/ArmCortexA9Lib RVCT: remove incompatible GCC include Ard Biesheuvel
2016-10-25 12:53 ` Leif Lindholm
2016-10-24 16:06 ` [PATCH 3/6] ArmPkg/LinuxLoader: eliminate calls to deprecated string functions Ard Biesheuvel
2016-10-25 10:53 ` Laszlo Ersek
2016-10-25 10:56 ` Ard Biesheuvel
2016-10-25 11:08 ` Ryan Harkin
2016-10-25 11:09 ` Ard Biesheuvel
2016-10-24 16:06 ` [PATCH 4/6] ArmPkg/SemihostFs: " Ard Biesheuvel
2016-10-25 11:11 ` Laszlo Ersek [this message]
2016-10-24 16:06 ` [PATCH 5/6] ArmPkg/BdsLib: " Ard Biesheuvel
2016-10-25 11:16 ` Laszlo Ersek
2016-10-24 16:06 ` [PATCH 6/6] ArmPkg: enable -DDISABLE_NEW_DEPRECATED_INTERFACES Ard Biesheuvel
2016-10-25 11:17 ` Laszlo Ersek
2016-10-25 11:32 ` [PATCH 0/6] ArmPkg: eliminate calls to deprecated functions Ryan Harkin
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