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- Fix context switch code. It works perfectly now.

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svn path=/trunk/; revision=34490
This commit is contained in:
ReactOS Portable Systems Group 2008-07-14 03:17:09 +00:00
parent 5c0b303c18
commit 7f9d319752
1 changed files with 40 additions and 12 deletions
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52
reactos/ntoskrnl/ke/arm/ctxswtch.s
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@ -19,14 +19,26 @@
//
//
// Save volatile registers for the OLD thread
// Make space for the trap frame
//
sub sp, sp, #(4*8)
mrs ip, spsr_all
stmia sp, {ip, lr}
sub sp, sp, #(4*2)
stmia sp, {r4-r11}
sub sp, sp, #ExceptionFrameLength
//
// Build exception frame
// FIXME: Change to stmdb later
//
str r4, [sp, #ExR4]
str r5, [sp, #ExR5]
str r6, [sp, #ExR6]
str r7, [sp, #ExR7]
str r8, [sp, #ExR8]
str r9, [sp, #ExR9]
str r10, [sp, #ExR10]
str r11, [sp, #ExR11]
str lr, [sp, #ExLr]
mrs r4, spsr_all
str r4, [sp, #ExSpsr]
//
// Switch stacks
//
@ -39,13 +51,29 @@
bl KiSwapContextInternal
//
// Restore volatile registers for the NEW thread
// Get the SPSR and restore it
//
ldmia sp, {r4-r11}
add sp, sp, #(4*8)
ldmia sp, {ip, lr}
msr spsr_all, ip
add sp, sp, #(4*2)
ldr r4, [sp, #ExSpsr]
msr spsr_all, r4
//
// Restore the registers
// FIXME: Use LDMIA later
//
ldr r4, [sp, #ExR4]
ldr r5, [sp, #ExR5]
ldr r6, [sp, #ExR6]
ldr r7, [sp, #ExR7]
ldr r8, [sp, #ExR8]
ldr r9, [sp, #ExR9]
ldr r10, [sp, #ExR10]
ldr r11, [sp, #ExR11]
ldr lr, [sp, #ExLr]
//
// Restore stack
//
add sp, sp, #ExceptionFrameLength
//
// Jump to saved restore address