Re: [edk2] [PATCH v2 4/4] ArmVirtPkg/QemuVirtMemInfoLib: trim the MMIO region mapping

2018-12-03 Thread Laszlo Ersek
On 11/30/18 12:28, Ard Biesheuvel wrote: > QEMU/mach-virt is rather unhelpful when it comes to tracking down > NULL pointer dereferences that occur while running in UEFI: since > we have NOR flash mapped at address 0x0, inadvertent reads go > unnoticed, and even most writes are silently dropped,

[edk2] [PATCH v2 4/4] ArmVirtPkg/QemuVirtMemInfoLib: trim the MMIO region mapping

2018-11-30 Thread Ard Biesheuvel
QEMU/mach-virt is rather unhelpful when it comes to tracking down NULL pointer dereferences that occur while running in UEFI: since we have NOR flash mapped at address 0x0, inadvertent reads go unnoticed, and even most writes are silently dropped, unless you're unlucky and the instruction in