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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>
This commit is contained in:
Jes Sorensen 2007-10-22 11:03:29 +10:00 committed by Rusty Russell
parent 625efab1cd
commit 4614a3a3b6
2 changed files with 3 additions and 4 deletions
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4
drivers/lguest/x86/switcher_32.S
View File

@ -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 \

3
include/asm-x86/lguest.h
View File

@ -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 */