On Tue, 2023-03-28 at 19:17 +0800, Qing Zhang wrote:
/* snip */
> -void * __init relocate_kernel(void)
> +unsigned long __init relocate_kernel(void)
Why we must modify relocate_kernel for KASAN?
> {
> unsigned long kernel_length;
> unsigned long random_offset = 0;
> void *location_new = _text; /* Default to original kernel start */
> - void *kernel_entry = start_kernel; /* Default to original kernel entry point */
> char *cmdline = early_ioremap(fw_arg1, COMMAND_LINE_SIZE); /* Boot command line is passed in fw_arg1 */
>
> strscpy(boot_command_line, cmdline, COMMAND_LINE_SIZE);
> @@ -190,9 +189,6 @@ void * __init relocate_kernel(void)
>
> reloc_offset += random_offset;
>
> - /* Return the new kernel's entry point */
> - kernel_entry = RELOCATED_KASLR(start_kernel);
> -
> /* The current thread is now within the relocated kernel */
> __current_thread_info = RELOCATED_KASLR(__current_thread_info);
>
> @@ -204,7 +200,7 @@ void * __init relocate_kernel(void)
>
> relocate_absolute(random_offset);
>
> - return kernel_entry;
> + return random_offset;
--
Xi Ruoyao <xry111@xxxxxxxxxxx>
School of Aerospace Science and Technology, Xidian University
