On 3/11/19 4:17 AM, Bin Meng wrote:

HI Heinrich,

On Mon, Mar 11, 2019 at 10:11 AM Heinrich Schuchardt xypron.glpk@gmx.de wrote:

...

Debian has recently (march 8th) upgraded GCC from 8.2 to 8.3.

When I compile qemu-x86_defconfig with CONFIG_CC_OPTIMIZE_FOR_SIZE=y some of the UEFI selftests (bootefi selftest) fail. It looks to me like ebx is not conserved.

With CONFIG_CC_OPTIMIZE_FOR_SIZE=n everything is fine.

Thanks for testing. Could you do some debugging to identify whether there is a bug in U-Boot, or a regression in GCC?

Regards, Bin

Hello Bin,

we pass a pointer to a 32bit address in efi_allocate_pool() where a pointer to a 64bit address is expected. Cf.

[PATCH 1/1] efi_loader: correct parameter size in efi_allocate_pool https://lists.denx.de/pipermail/u-boot/2019-March/362128.html

Best regards

Heinrich