diff options
| author | Miguel <m.i@gmx.at> | 2018-08-21 17:54:28 +0200 |
|---|---|---|
| committer | Miguel <m.i@gmx.at> | 2018-08-21 17:54:28 +0200 |
| commit | 6c926175afbf1f9ec2715fb007acc28588b36c4a (patch) | |
| tree | e35451d0c8e5c3f3b6033b919f405a40fd6128fc /asm | |
| parent | 8a5fbdabb24250a76feed770bce64d7e3e4f61de (diff) | |
cleaning up multitasking
Diffstat (limited to 'asm')
| -rw-r--r-- | asm/int_mouse_handler.asm | 5 | ||||
| -rw-r--r-- | asm/int_syscall_handler.asm | 4 | ||||
| -rw-r--r-- | asm/task.s | 75 |
3 files changed, 80 insertions, 4 deletions
diff --git a/asm/int_mouse_handler.asm b/asm/int_mouse_handler.asm index 6872af0..9816950 100644 --- a/asm/int_mouse_handler.asm +++ b/asm/int_mouse_handler.asm @@ -7,9 +7,10 @@ int_mouse_handler: call mouse_handler - mov al, 0x20 ;Port number AND command number to Acknowledge IRQ + mov al, 0x20 ; Port number AND command number to Acknowledge IRQ out 0xa0, al ; came from slave - out 0x20, al ;Acknowledge IRQ, so we keep getting interrupts + out 0x20, al ; Acknowledge IRQ, so we keep getting interrupts + popa iret ;Interrupt-Return diff --git a/asm/int_syscall_handler.asm b/asm/int_syscall_handler.asm index 952faae..a26592f 100644 --- a/asm/int_syscall_handler.asm +++ b/asm/int_syscall_handler.asm @@ -221,8 +221,8 @@ call_unhandled: ;; TODO: redesign this shit! call_read: - mov al, 0x20 ;Port number AND command number to Acknowledge IRQ - out 0x20, al ;Acknowledge IRQ, so we keep getting interrupts + ;//mov al, 0x20 ;Port number AND command number to Acknowledge IRQ + ;//out 0x20, al ;Acknowledge IRQ, so we keep getting interrupts sti call syscall_read diff --git a/asm/task.s b/asm/task.s new file mode 100644 index 0000000..7611d4a --- /dev/null +++ b/asm/task.s @@ -0,0 +1,75 @@ +.global task_pusha +task_pusha: + + pushf + + push $0x8 + push $userfunc + + pusha + /* + now stack looks like: + + param // esp+48 + returnaddy + + eflags + code segment + userfunc + + eax // rest by popa + ecx + edx + ebx + esp + ebp + esi + edi + + */ + + mov 48(%esp),%eax // get address of alternative stack where we want to simulate the pusha + + mov (%esp),%ecx + mov %ecx,(%eax) + + mov 4(%esp),%ecx + mov %ecx,4(%eax) + + mov 8(%esp),%ecx + mov %ecx,8(%eax) + + mov 12(%esp),%ecx + mov %ecx,12(%eax) + + mov 16(%esp),%ecx + mov %ecx,16(%eax) + + mov 20(%esp),%ecx + mov %ecx,20(%eax) + + mov 24(%esp),%ecx + mov %ecx,24(%eax) + + mov 28(%esp),%ecx + mov %ecx,28(%eax) + + mov 32(%esp),%ecx + mov %ecx,32(%eax) + + mov 36(%esp),%ecx + mov %ecx,36(%eax) + + mov 40(%esp),%ecx + mov %ecx,40(%eax) + + mov 44(%esp),%ecx + mov %ecx,44(%eax) + + pop %eax + pop %eax + pop %eax + + popa + + ret |