On 10/11/2018 9:05 PM, [email protected] wrote:
Is the line:Size = gST->Hdr.HeaderSize; possibly a better way of handling this? Either way: Reviewed-by: Jim Dailey <[email protected]>
Thanks! I will stick to use sizeof().
-----Original Message----- From: edk2-devel [mailto:[email protected]] On Behalf Of Ruiyu Ni Sent: Thursday, October 11, 2018 2:53 AM To: [email protected] Cc: Jaben Carsey Subject: [edk2] [PATCH] ShellPkg/dmem: Only dump sizeof (EFI_SYSTEM_TABLE) bytes for gST REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1236 When "dmem" runs without additional arguments, it dumps the memory content of EFI_SYSTEM_TABLE. But today's implementation dumps 512 bytes. It's not correct because sizeof (EFI_SYSTEM_TABLE) is less than 512, the 512-read causes page fault exception in a heap-guard enabled environment. The patch changes the implementation to only dump sizeof (EFI_SYSTEM_TABLE) bytes for gST. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ruiyu Ni <[email protected]> Cc: Jaben Carsey <[email protected]> --- ShellPkg/Library/UefiShellDebug1CommandsLib/Dmem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/ShellPkg/Library/UefiShellDebug1CommandsLib/Dmem.c b/ShellPkg/Library/UefiShellDebug1CommandsLib/Dmem.c index f38593a9e9..a4c18c9b68 100644 --- a/ShellPkg/Library/UefiShellDebug1CommandsLib/Dmem.c +++ b/ShellPkg/Library/UefiShellDebug1CommandsLib/Dmem.c @@ -149,7 +149,7 @@ ShellCommandRunDmem ( Temp1 = ShellCommandLineGetRawValue(Package, 1); if (Temp1 == NULL) { Address = gST; - Size = 512; + Size = sizeof (*gST); } else { if (!ShellIsHexOrDecimalNumber(Temp1, TRUE, FALSE) || EFI_ERROR(ShellConvertStringToUint64(Temp1, (UINT64*)&Address, TRUE, FALSE))) { ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PARAM_INV), gShellDebug1HiiHandle, L"dmem", Temp1);
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