Why send a test patch?
On Tue, Dec 5, 2023 at 2:04 PM <wangyao@xxxxxxxxxx> wrote:
>
> From: Wang Yao <wangyao@xxxxxxxxxx>
>
> This is a test patch for PIE kernel that load address is not equal to
> link address.
>
> Signed-off-by: Wang Yao <wangyao@xxxxxxxxxx>
> ---
> drivers/firmware/efi/libstub/loongarch-stub.c | 12 +++++++++++-
> 1 file changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/firmware/efi/libstub/loongarch-stub.c b/drivers/firmware/efi/libstub/loongarch-stub.c
> index d6ec5d4b8dbe..c13c022d18cf 100644
> --- a/drivers/firmware/efi/libstub/loongarch-stub.c
> +++ b/drivers/firmware/efi/libstub/loongarch-stub.c
> @@ -22,12 +22,22 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
> efi_handle_t image_handle)
> {
> efi_status_t status;
> - unsigned long kernel_addr = 0;
> + unsigned long kernel_addr = 0, tmp_addr = 0;
>
> kernel_addr = (unsigned long)&kernel_offset - kernel_offset;
>
> + /*
> + * Allocate 2M space at 0x200000(EFI_KIMG_PREFERRED_ADDRESS) for
> + * test, this will lead to the kernel be loaded at 0x4000000.
> + */
> + status = efi_relocate_kernel(&tmp_addr, 0x100000, 0x200000,
> + EFI_KIMG_PREFERRED_ADDRESS, efi_get_kimg_min_align(), 0x0);
> + efi_info("@@@[%s] tmp_addr: 0x%lx\n", __func__, tmp_addr);
> +
> + /* kernel_addr == 0x400000 */
> status = efi_relocate_kernel(&kernel_addr, kernel_fsize, kernel_asize,
> EFI_KIMG_PREFERRED_ADDRESS, efi_get_kimg_min_align(), 0x0);
> + efi_info("@@@[%s] kernel_addr: 0x%lx\n", __func__, kernel_addr);
>
> *image_addr = kernel_addr;
> *image_size = kernel_asize;
> --
> 2.27.0
>
