;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision: 7124 $
; diamond, 2006
sys_debug_services:
cmp ebx, 9
ja @f
jmp dword [sys_debug_services_table+ebx*4]
@@:
ret
iglobal
align 4
sys_debug_services_table:
dd debug_set_event_data
dd debug_getcontext
dd debug_setcontext
dd debug_detach
dd debug_suspend
dd debug_resume
dd debug_read_process_memory
dd debug_write_process_memory
dd debug_terminate
dd debug_set_drx
endg
debug_set_event_data:
; in: ecx = pointer
; destroys eax
mov eax, [current_slot]
mov [eax+APPDATA.dbg_event_mem], ecx
ret
get_debuggee_slot:
; in: ecx=PID
; out: CF=1 if error
; CF=0 and eax=slot*0x20 if ok
; out: interrupts disabled
cli
mov eax, ecx
call pid_to_slot
test eax, eax
jz .ret_bad
shl eax, 5
push ebx
mov ebx, [CURRENT_TASK]
cmp [SLOT_BASE+eax*8+APPDATA.debugger_slot], ebx
pop ebx
jnz .ret_bad
; clc ; automatically
ret
.ret_bad:
stc
ret
debug_detach:
; in: ecx=pid
; destroys eax,ebx
call get_debuggee_slot
jc .ret
and dword [eax*8+SLOT_BASE+APPDATA.debugger_slot], 0
call do_resume
.ret:
sti
ret
debug_terminate:
; in: ecx=pid
call get_debuggee_slot
jc debug_detach.ret
mov ecx, eax
shr ecx, 5
; push 2
; pop ebx
mov edx, esi
jmp sysfn_terminate
debug_suspend:
; in: ecx=pid
; destroys eax,ecx
cli
mov eax, ecx
call pid_to_slot
shl eax, 5
jz .ret
mov cl, [CURRENT_TASK+eax+TASKDATA.state] ; process state
test cl, cl
jz .1
cmp cl, 5
jnz .ret
mov cl, 2
.2:
mov [CURRENT_TASK+eax+TASKDATA.state], cl
.ret:
sti
ret
.1:
inc ecx
jmp .2
do_resume:
mov cl, [CURRENT_TASK+eax+TASKDATA.state]
cmp cl, 1
jz .1
cmp cl, 2
jnz .ret
mov cl, 5
.2:
mov [CURRENT_TASK+eax+TASKDATA.state], cl
.ret:
ret
.1:
dec ecx
jmp .2
debug_resume:
; in: ecx=pid
; destroys eax,ebx
cli
mov eax, ecx
call pid_to_slot
shl eax, 5
jz .ret
call do_resume
.ret:
sti
ret
debug_getcontext:
; in:
; ecx=pid
; edx=sizeof(CONTEXT)
; esi->CONTEXT
; destroys eax,ebx,ecx,edx,esi,edi
xor ebx, ebx ; 0 - get only gp regs
cmp edx, 40
je .std_ctx
cmp edx, 48+288
jne .ret
inc ebx ; 1 - get sse context
; TODO legacy 32-bit FPU/MMX context
.std_ctx:
; push ecx
; mov ecx, esi
call check_region
; pop ecx
dec eax
jnz .ret
call get_debuggee_slot
jc .ret
shr eax, 5
cmp eax, [fpu_owner]
jne @f
inc bh ; set swap context flag
@@:
shl eax, 8
mov edi, esi
mov eax, [eax+SLOT_BASE+APPDATA.pl0_stack]
lea esi, [eax+RING0_STACK_SIZE]
.ring0:
; note that following code assumes that all interrupt/exception handlers
; save ring-3 context by pushad in this order
; top of ring0 stack: ring3 stack ptr (ss+esp), iret data (cs+eip+eflags), pushad
sub esi, 8+12+20h
lodsd ;edi
mov [edi+24h], eax
lodsd ;esi
mov [edi+20h], eax
lodsd ; ebp
mov [edi+1Ch], eax
lodsd ;esp
lodsd ;ebx
mov [edi+14h], eax
lodsd ;edx
mov [edi+10h], eax
lodsd ;ecx
mov [edi+0Ch], eax
lodsd ;eax
mov [edi+8], eax
lodsd ;eip
mov [edi], eax
lodsd ;cs
lodsd ;eflags
mov [edi+4], eax
lodsd ;esp
mov [edi+18h], eax
dec bl
js .ret
dec bl
jns .ret
test bh, bh ; check swap flag
jz @F
ffree st0 ; swap context
@@:
add esi, 4 ;top of ring0 stack
;fpu/sse context saved here
add edi, 40
mov eax, 1 ;sse context
stosd
xor eax, eax ;reserved dword
stosd
mov ecx, 288/4
rep movsd ;copy sse context
.ret:
sti
ret
debug_setcontext:
; in:
; ecx=pid
; edx=sizeof(CONTEXT)
; esi->CONTEXT
; destroys eax,ecx,edx,esi,edi
cmp edx, 28h
jnz .ret
; push ebx
; mov ebx, edx
call check_region
; pop ebx
dec eax
jnz .ret
call get_debuggee_slot
jc .stiret
; mov esi, edx
mov eax, [eax*8+SLOT_BASE+APPDATA.pl0_stack]
lea edi, [eax+RING0_STACK_SIZE]
.ring0:
sub edi, 8+12+20h
mov eax, [esi+24h] ;edi
stosd
mov eax, [esi+20h] ;esi
stosd
mov eax, [esi+1Ch] ;ebp
stosd
scasd
mov eax, [esi+14h] ;ebx
stosd
mov eax, [esi+10h] ;edx
stosd
mov eax, [esi+0Ch] ;ecx
stosd
mov eax, [esi+8] ;eax
stosd
mov eax, [esi] ;eip
stosd
scasd
mov eax, [esi+4] ;eflags
stosd
mov eax, [esi+18h] ;esp
stosd
.stiret:
sti
.ret:
ret
debug_set_drx:
call get_debuggee_slot
jc .errret
mov ebp, eax
lea eax, [eax*8+SLOT_BASE+APPDATA.dbg_regs]
; [eax]=dr0, [eax+4]=dr1, [eax+8]=dr2, [eax+C]=dr3
; [eax+10]=dr7
cmp esi, OS_BASE
jae .errret
cmp dl, 3
ja .errret
mov ecx, dr7
;fix me
xchg ecx, edx
shr edx, cl
shr edx, cl
xchg ecx, edx
test ecx, 2 ; bit 1+2*index = G0..G3, global break enable
jnz .errret2
test dh, dh
jns .new
; clear breakpoint
movzx edx, dl
add edx, edx
and dword [eax+edx*2], 0 ; clear DR<i>
btr dword [eax+10h], edx ; clear L<i> bit
test byte [eax+10h], 55h
jnz .okret
; imul eax, ebp, tss_step/32
; and byte [eax + tss_data + TSS._trap], not 1
and [ebp*8 + SLOT_BASE+APPDATA.dbg_state], not 1
.okret:
and dword [esp+32], 0
sti
ret
.errret:
sti
mov dword [esp+32], 1
ret
.errret2:
sti
mov dword [esp+32], 2
ret
.new:
; add new breakpoint
; dl=index; dh=flags; esi=address
test dh, 0xF0
jnz .errret
mov cl, dh
and cl, 3
cmp cl, 2
jz .errret
mov cl, dh
shr cl, 2
cmp cl, 2
jz .errret
mov ebx, esi
test bl, dl
jnz .errret
or byte [eax+10h+1], 3 ; set GE and LE flags
movzx edx, dh
movzx ecx, dl
add ecx, ecx
bts dword [eax+10h], ecx ; set L<i> flag
add ecx, ecx
mov [eax+ecx], ebx;esi ; set DR<i>
shl edx, cl
mov ebx, 0xF
shl ebx, cl
not ebx
and [eax+10h+2], bx
or [eax+10h+2], dx ; set R/W and LEN fields
; imul eax, ebp, tss_step/32
; or byte [eax + tss_data + TSS._trap], 1
or [ebp*8 + SLOT_BASE+APPDATA.dbg_state], 1
jmp .okret
debug_read_process_memory:
; in:
; ecx=pid
; edx=length
; edi->buffer in debugger
; esi=address in debuggee
; out: [esp+36]=sizeof(read)
; destroys all
; push ebx
; mov ebx, esi
call check_region
; pop ebx
dec eax
jnz .err
call get_debuggee_slot
jc .err
shr eax, 5
mov ecx, edi
call read_process_memory
sti
mov dword [esp+32], eax
ret
.err:
or dword [esp+32], -1
ret
debug_write_process_memory:
; in:
; ecx=pid
; edx=length
; edi->buffer in debugger
; esi=address in debuggee
; out: [esp+36]=sizeof(write)
; destroys all
; push ebx
; mov ebx, esi
call check_region
; pop ebx
dec eax
jnz debug_read_process_memory.err
call get_debuggee_slot
jc debug_read_process_memory.err
shr eax, 5
mov ecx, edi
call write_process_memory
sti
mov [esp+32], eax
ret
debugger_notify:
; in: eax=debugger slot
; ecx=size of debug message
; [esp+4]..[esp+4+ecx]=message
; interrupts must be disabled!
; destroys all general registers
; interrupts remain disabled
xchg ebp, eax
mov edi, [timer_ticks]
add edi, 500 ; 5 sec timeout
.1:
mov eax, ebp
shl eax, 8
mov esi, [SLOT_BASE+eax+APPDATA.dbg_event_mem]
test esi, esi
jz .ret
; read buffer header
push ecx
push eax
push eax
mov eax, ebp
mov ecx, esp
mov edx, 8
call read_process_memory
cmp eax, edx
jz @f
add esp, 12
jmp .ret
@@:
cmp dword [ecx], 0
jg @f
.2:
pop ecx
pop ecx
pop ecx
cmp dword [CURRENT_TASK], 1
jnz .notos
cmp [timer_ticks], edi
jae .ret
.notos:
sti
call change_task
cli
jmp .1
@@:
mov edx, [ecx+8]
add edx, [ecx+4]
cmp edx, [ecx]
ja .2
; advance buffer position
push edx
mov edx, 4
sub ecx, edx
mov eax, ebp
add esi, edx
call write_process_memory
pop eax
; write message
mov eax, ebp
add esi, edx
add esi, [ecx+8]
add ecx, 20
pop edx
pop edx
pop edx
call write_process_memory
; new debug event
mov eax, ebp
shl eax, 8
or byte [SLOT_BASE+eax+APPDATA.event_mask+1], 1 ; set flag 100h
.ret:
ret