.text /* Originally gcc generated, modified by hand * * This may not use any stack, nor any variable that is not "NoSave": * * Its rewriting one kernel image with another. What is stack in "old" * image could very well be data page in "new" image, and overwriting * your own stack under you is bad idea. */ #include #include #include #include .text ENTRY(swsusp_arch_suspend) movl %esp, saved_context_esp movl %ebx, saved_context_ebx movl %ebp, saved_context_ebp movl %esi, saved_context_esi movl %edi, saved_context_edi pushfl ; popl saved_context_eflags call swsusp_save ret ENTRY(restore_image) movl resume_pg_dir, %ecx subl $__PAGE_OFFSET, %ecx movl %ecx, %cr3 movl restore_pblist, %edx .p2align 4,,7 copy_loop: testl %edx, %edx jz done movl pbe_address(%edx), %esi movl pbe_orig_address(%edx), %edi movl $1024, %ecx rep movsl movl pbe_next(%edx), %edx jmp copy_loop .p2align 4,,7 done: /* go back to the original page tables */ movl $swapper_pg_dir, %ecx subl $__PAGE_OFFSET, %ecx movl %ecx, %cr3 /* Flush TLB, including "global" things (vmalloc) */ movl mmu_cr4_features, %eax movl %eax, %edx andl $~(1<<7), %edx; # PGE movl %edx, %cr4; # turn off PGE movl %cr3, %ecx; # flush TLB movl %ecx, %cr3 movl %eax, %cr4; # turn PGE back on movl saved_context_esp, %esp movl saved_context_ebp, %ebp movl saved_context_ebx, %ebx movl saved_context_esi, %esi movl saved_context_edi, %edi pushl saved_context_eflags ; popfl xorl %eax, %eax ret