mirror of
https://github.com/deadw00d/AROS.git
synced 2026-03-19 11:39:53 +00:00
e3f771fc2e
git-svn-id: https://svn.aros.org/svn/aros/trunk/AROS@42353 fb15a70f-31f2-0310-bbcc-cdcc74a49acc
31 lines
942 B
ArmAsm
31 lines
942 B
ArmAsm
#include <aros/i386/asm.h>
|
|
|
|
.text
|
|
.align 16
|
|
|
|
.globl cpu_SuperState
|
|
.type cpu_SuperState, @function
|
|
|
|
// This is a SuperState() helper. It's called via Supervisor().
|
|
// Its job is to restore a stack pointer and return to user's code.
|
|
cpu_SuperState:
|
|
movl %esp, %eax // return int handler stack
|
|
movl 12(%eax),%esp // use user stack
|
|
pushl (%eax) // push return address
|
|
ret // return from SuperState() call
|
|
|
|
.size cpu_SuperState, .-cpu_SuperState
|
|
|
|
.globl AROS_SLIB_ENTRY(UserState, Exec, 26)
|
|
.type AROS_SLIB_ENTRY(UserState, Exec, 26), @function
|
|
|
|
AROS_SLIB_ENTRY(UserState, Exec, 26):
|
|
popl %ecx // Get return address
|
|
movl (%esp), %eax // Get supervisor return stack
|
|
movl %ecx, (%eax) // Set return address
|
|
movl %esp, 12(%eax) // Set USP in exception stack frame
|
|
movl %eax, %esp // SSP = SP
|
|
iret // Exit from interrupt
|
|
|
|
.size AROS_SLIB_ENTRY(UserState, Exec, 26), .-AROS_SLIB_ENTRY(UserState, Exec, 26)
|