Changeset fa2d382 in mainline for arch/amd64/src/asm_utils.S

Timestamp:

2006-02-07T09:36:54Z (19 years ago)

Author:

Ondrej Palkovsky <ondrap@…>

Branches:

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

Children:

4fdf3cc

Parents:

65640fef

Message:

Doc updates.

File:

• arch/amd64/src/asm_utils.S (modified) (2 diffs)

arch/amd64/src/asm_utils.S

@@ -36 +36 @@
 #include <arch/pm.h>
 #include <arch/context_offset.h>
+#include <arch/mm/page.h>
         
 .text
@@ -195 +196 @@
         # Switch to hidden gs   
         swapgs
-
-        # TODO: I would like LEA instead of thes 2 instrs,
-        # why does not it work???
-        mov %gs:0, %r10     # We have a stack in r10
-        addq $0x0ff0, %r10
+        # %gs:0 now points to pointer to stack page
+        mov %gs:0, %r10     # We have a ptr to stack page in r10
+        addq $PAGE_SIZE-16, %r10 # We need some space to store old %sp
         
         movq %rsp, 0(%r10)  # Save old stack pointer to stack