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); -- 2.16.1.windows.1 _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
