Changeset 17af882 in mainline for kernel/arch/amd64/src/boot/multiboot2.S

Timestamp:

2014-06-16T11:32:05Z (10 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

2cb32f9

Parents:

334bf28

Message:

Switch the amd64 kernel (back) from 'large' to 'kernel' memory model.

• This makes the amd64 kernel 6% smaller and more comfortable to debug.
• Unlike in the original 'kernel' memory model implementation, KA2PA(PA2KA(x)) == x; for x from kernel identity.
• Memory outside of the kernel identity region continues to be available by the standard means.

File:

• kernel/arch/amd64/src/boot/multiboot2.S (modified) (1 diff)

kernel/arch/amd64/src/boot/multiboot2.S

@@ -244 +244 @@
         
         /* Call arch_pre_main(multiboot_eax, multiboot_ebx) */
-        xorq %rdi, %rdi
         movl multiboot_eax, %edi
-        xorq %rsi, %rsi
         movl multiboot_ebx, %esi
-        
-        movabsq $arch_pre_main, %rax
-        callq *%rax
+        callq arch_pre_main 
         
         /* Call main_bsp() */
-        movabsq $main_bsp, %rax
-        call *%rax
+        callq main_bsp 
         
         /* Not reached */