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authorJes Sorensen <jes@sgi.com>2007-10-22 11:03:29 +1000
committerRusty Russell <rusty@rustcorp.com.au>2007-10-23 15:49:51 +1000
commit4614a3a3b638dfd7a67d0237944f6a76331af61d (patch)
tree8ec25721127eb899b97e46551b1644644ca698ac
parent625efab1cd3d4da4634dfe26df6b4005385397e2 (diff)
downloadop-kernel-dev-4614a3a3b638dfd7a67d0237944f6a76331af61d.zip
op-kernel-dev-4614a3a3b638dfd7a67d0237944f6a76331af61d.tar.gz
Reorder guest saved regs to match hyperall order
Move eax next to ebx/ecx/edx in struct lguest_regs on i386, so they will be located together and allow it to map directly to a struct hcall_ring entry (which will be renamed struct hcall_args as in a subsequent patch). This is in preparation for making the code hcall code architecture independent. Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
-rw-r--r--drivers/lguest/x86/switcher_32.S4
-rw-r--r--include/asm-x86/lguest.h3
2 files changed, 3 insertions, 4 deletions
diff --git a/drivers/lguest/x86/switcher_32.S b/drivers/lguest/x86/switcher_32.S
index e66cec5..1010b90 100644
--- a/drivers/lguest/x86/switcher_32.S
+++ b/drivers/lguest/x86/switcher_32.S
@@ -133,6 +133,7 @@ ENTRY(switch_to_guest)
// The Guest's register page has been mapped
// Writable onto our %esp (stack) --
// We can simply pop off all Guest regs.
+ popl %eax
popl %ebx
popl %ecx
popl %edx
@@ -140,7 +141,6 @@ ENTRY(switch_to_guest)
popl %edi
popl %ebp
popl %gs
- popl %eax
popl %fs
popl %ds
popl %es
@@ -168,7 +168,6 @@ ENTRY(switch_to_guest)
pushl %es; \
pushl %ds; \
pushl %fs; \
- pushl %eax; \
pushl %gs; \
pushl %ebp; \
pushl %edi; \
@@ -176,6 +175,7 @@ ENTRY(switch_to_guest)
pushl %edx; \
pushl %ecx; \
pushl %ebx; \
+ pushl %eax; \
/* Our stack and our code are using segments \
* Set in the TSS and IDT \
* Yet if we were to touch data we'd use \
diff --git a/include/asm-x86/lguest.h b/include/asm-x86/lguest.h
index f10f1c6..ccd3384 100644
--- a/include/asm-x86/lguest.h
+++ b/include/asm-x86/lguest.h
@@ -26,10 +26,9 @@ extern unsigned long default_idt_entries[];
struct lguest_regs
{
/* Manually saved part. */
- unsigned long ebx, ecx, edx;
+ unsigned long eax, ebx, ecx, edx;
unsigned long esi, edi, ebp;
unsigned long gs;
- unsigned long eax;
unsigned long fs, ds, es;
unsigned long trapnum, errcode;
/* Trap pushed part */
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