2 * This may not use any stack, nor any variable that is not "NoSave":
4 * Its rewriting one kernel image with another. What is stack in "old"
5 * image could very well be data page in "new" image, and overwriting
6 * your own stack under you is bad idea.
9 #include <linux/linkage.h>
10 #include <asm/segment.h>
12 #include <asm/asm-offsets.h>
13 #include <asm/processor-flags.h>
17 ENTRY(swsusp_arch_suspend)
18 movl %esp, saved_context_esp
19 movl %ebx, saved_context_ebx
20 movl %ebp, saved_context_ebp
21 movl %esi, saved_context_esi
22 movl %edi, saved_context_edi
24 popl saved_context_eflags
30 movl resume_pg_dir, %eax
31 subl $__PAGE_OFFSET, %eax
34 movl restore_pblist, %edx
41 movl pbe_address(%edx), %esi
42 movl pbe_orig_address(%edx), %edi
48 movl pbe_next(%edx), %edx
53 /* go back to the original page tables */
54 movl $swapper_pg_dir, %eax
55 subl $__PAGE_OFFSET, %eax
57 /* Flush TLB, including "global" things (vmalloc) */
58 movl mmu_cr4_features, %ecx
59 jecxz 1f # cr4 Pentium and higher, skip if zero
61 andl $~(X86_CR4_PGE), %edx
62 movl %edx, %cr4; # turn off PGE
64 movl %cr3, %eax; # flush TLB
66 jecxz 1f # cr4 Pentium and higher, skip if zero
67 movl %ecx, %cr4; # turn PGE back on
70 movl saved_context_esp, %esp
71 movl saved_context_ebp, %ebp
72 movl saved_context_ebx, %ebx
73 movl saved_context_esi, %esi
74 movl saved_context_edi, %edi
76 pushl saved_context_eflags