link: add section for storing commandline parameters

This commit is adding a dedicated ".cmdline" section for storing commandline parameters found during the compilation process. This is later used during runtime to loop over this section and compare passed commandline parameters with known ones. Signed-off-by: Martin Mazein <[email protected]>
KernelTestFramework · Aug 26, 2020 · 67660ec · 67660ec
1 parent 54f2ced
commit 67660ec
Show file tree

Hide file tree

Showing 2 changed files with 5 additions and 0 deletions.
diff --git a/arch/x86/link.ld b/arch/x86/link.ld
@@ -145,6 +145,9 @@ SECTIONS
         . = ALIGN(4K);
         __start_data = .;
             *(.data)
+        __start_cmdline = .;
+            *(.cmdline)
+        __end_cmdline = .;
         . = ALIGN(4K);
         __end_data = .;
     } :kernel

diff --git a/include/compiler.h b/include/compiler.h
@@ -78,6 +78,8 @@
 #define __user_data __section(".data.user")
 #define __user_bss  __section(".bss.user")
 
+#define __cmdline __section(".cmdline")
+
 #define barrier()      asm volatile("" ::: "memory")
 #define ACCESS_ONCE(x) (*(volatile typeof(x) *) &(x))