From c528e72f4adea11e51eb72f359a496d6e7afbee6 Mon Sep 17 00:00:00 2001
From: kieron <kieron@6dbc8c32-bb84-406f-8558-d1cf31a0ab0c>
Date: Wed, 17 May 2017 16:58:54 +0000
Subject: [PATCH] Started Hooking for ISRs.

git-svn-id: https://spexeah.com:8443/svn/Asuro@74 6dbc8c32-bb84-406f-8558-d1cf31a0ab0c
---
 Asuro.iso                 | Bin 5070848 -> 5070848 bytes
 bin/kernel.bin            | Bin 16612 -> 16612 bytes
 iso/boot/asuro.bin        | Bin 16612 -> 16612 bytes
 lib/isr.ppu               | Bin 1815 -> 1815 bytes
 lib/isr0.ppu              | Bin 1222 -> 1977 bytes
 lib/libpkernel.a          | Bin 24370 -> 24370 bytes
 src/drivers/isr0.pas      |  34 ++++++++++++++++++++++++++++++++++
 src/drivers/isr32.pas     |  27 ++++++++++++++-------------
 src/drivers/isr33.pas     |   1 +
 src/drivers/isr40.pas     |  14 ++++++--------
 src/drivers/isr_types.pas |   6 ++++++
 11 files changed, 61 insertions(+), 21 deletions(-)

diff --git a/Asuro.iso b/Asuro.iso
index f35b1dedbf17372531fb53d5c7034bb1cfb9dbc9..8ecfd58a3b72f50830444fca2a74d1e07c6bb101 100644
GIT binary patch
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diff --git a/bin/kernel.bin b/bin/kernel.bin
index 881b9c1bf42fa4c625e58859bb6a7a7e6c110b91..7aac7a255372ee11521d51c8266539d8001e9291 100755
GIT binary patch
delta 2030
zcmbVNZBSHY6n^h@*Ii`c?!p3#u(0TYCJ9cW=#;b~`PG<=qXnAa_^}DuL<HmyM<iro
z*|wp1wQ-u7AU~$^53$Nz^+zg-qGLHUQ&dw!hV&|?SfipMx98kll9~F|ojD)xInO!g
zJ?Gv%+g~U3*GbI|`DOXb$(mBI$;_Bn-N3|JJ7eh@V@zD0#8|7rWn~Q~t8BV24?ce!
znY5mEmsf3J;&3cuq`H`B;p?rr^3rJjfi=Zi6vLRB1Ed%=Ay+Yc$-K{MmjvHyO`SJv
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zpo8$oi7oft&G%dOQlj~%s@(Mtl*(HnNAsAyp}X4TGw2X<i_XB2jQ@_Wjye~@k$aGJ
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ziPXl+?WMBS$S>NrOY?&TanDLi!sEMQK}SXFir1EudQ-h7uhQyOKL2Ko?`qrJfyG`m
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zhWaz+u}KB0GFbDc6!(v%hBd{JK~y7gCjr9e26^1M7J#GU4LHx4Fb;t8-v4{9zhU+z
zyM4H-e@>{+D7t@Hcc@n<dP-pdOLU{5*dG-F=naky!<o-p9hH)W+Y_^;lfi<-Xemu^
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r5rDvS5h_Xr=@L|kic$d<ypyw1Hg4Ur?e*EgvfO><_gg$%^8EHU%fH<P

delta 1924
zcmbVNdu&rx7(eH(-8$B-w`;q#tlPTMcH`lyFa%A&#b6vn9Z?b=$hJhORE<nB2N7YL
z1KnsQBL|hle>x%h2Z=#C>LtVk8H^3YOhm&Y>Qq8ba1aoQW3XL+-))DB{^w1;^Sz(<
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z*@1G9`nkeV-YecL3@byKVsBv(dA=>2%`3!sp}VDGhRSToBhkZgjLDWf*Hx7nXN@ZB
zSW?GZ$K30VwBD*+cc9;_K*svb8H8fqK&&ZXYCme}>*@``k99SLSog=|cURKPwz)_k
z-+;c44AT5oWeVQ{g9B3q;OA#dF#!Mm|K;09ES=s!CrXXYPxYBg^+yNeD9M&AMo%TI
z%bM3=dN!7uGB6sP97eGs?(?kUbHpA`m=7n;c=C9e(bDP(T{l{iD?!QT$p*U7Vj`pH
z6P`nPUb(Q`mNYA(*ZV{ZjgJ_h_R-qSS?Phww{=A7o-oovPj2m_?#)&iMTx0#yX7h}
znmXwTBhZw1W|<9pS!EbDv;V|Xt<v*PKqMDCimTkImYsozqo?E0+L8lZUPo+Eh4`_!
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zo)namU?511p!AzQgM~x;u&wRaYv?|E2yP*Ww>@$PR1lPA3L)8@zjVFxnlu~PL*hMO
zfyYg92Lx!N28QKKqky}Yi7$OSU2{kqftN-)`4+w(ZJ~&i&ER{)wz9A?tcpWrmHeo<
zTo$J7;1BbQVwpdz#O-3Ezfv)ki@p9z&JySSr3w#-u|SwF7qf!1=G2rU-U~N$y=Mt1
z?71w1NbQF>lO0HvUKN`}V{oQzpEJEFDr5x)D|V?~b>TP-k0Sl_2fpkFVCWT%j%h8f
zv~8XoKx>127z!S33z>dEraiyo7@_O1{x*&$ui`jG)W8Ui_A59_?%+5_)Ssl?PR9vy
z+lo-KfwVEaJQ=!<<2t#GT*grjszC0)267Ye7J9+EC~=9{9tzrP;HdQyf0Z1Uj*HiW
zw4bxBzJhesR(UpYGnA7p)biH-_wH17#7(Zktj5Or=C#omk^C+#y5`PX^k}xqo(8-G
zSPys?@FCz+z!!kyfHQz!09OIG0hVbha{>H`@wr93<p-=)dX52e;FG}kWZ4a1YzsC7
zoC9nQsEn@eD0uv$*aUDcunIYT94rTzuAdJ$57-TC2L2g#`1aWaU~GAI1vnG<5-^^{
zMq)}ziKrMdBquT;V=9D_QbH<%5>Zl0;7fd8RZBA}TeJGrwet|~?tK15v&75=yDWlN
G|MoXo8l(*X

diff --git a/iso/boot/asuro.bin b/iso/boot/asuro.bin
index 881b9c1bf42fa4c625e58859bb6a7a7e6c110b91..7aac7a255372ee11521d51c8266539d8001e9291 100755
GIT binary patch
delta 2030
zcmbVNZBSHY6n^h@*Ii`c?!p3#u(0TYCJ9cW=#;b~`PG<=qXnAa_^}DuL<HmyM<iro
z*|wp1wQ-u7AU~$^53$Nz^+zg-qGLHUQ&dw!hV&|?SfipMx98kll9~F|ojD)xInO!g
zJ?Gv%+g~U3*GbI|`DOXb$(mBI$;_Bn-N3|JJ7eh@V@zD0#8|7rWn~Q~t8BV24?ce!
znY5mEmsf3J;&3cuq`H`B;p?rr^3rJjfi=Zi6vLRB1Ed%=Ay+Yc$-K{MmjvHyO`SJv
zW9$Tqu;+bu7x@hzk7Vm*qE)i_?fO~kseh>K_*Gp^S>B>7Ju&>Fcqd<Gi>%!m#aMS|
zpo8$oi7oft&G%dOQlj~%s@(Mtl*(HnNAsAyp}X4TGw2X<i_XB2jQ@_Wjye~@k$aGJ
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ziPXl+?WMBS$S>NrOY?&TanDLi!sEMQK}SXFir1EudQ-h7uhQyOKL2Ko?`qrJfyG`m
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zj#~3nD^og7mz``uxYF@MAZKEWr^3n_3reJ24;+=JcimrEd9=%z4;$+;E+XMicKfT`
zhWaz+u}KB0GFbDc6!(v%hBd{JK~y7gCjr9e26^1M7J#GU4LHx4Fb;t8-v4{9zhU+z
zyM4H-e@>{+D7t@Hcc@n<dP-pdOLU{5*dG-F=naky!<o-p9hH)W+Y_^;lfi<-Xemu^
zY0Idl=`D$M&_vBx1I=hL_~zt8QY6)R^`}Cm!<f(A$uHE>_~-ypKfH3MDLhc|wuVg2
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zK-&UM?WeLM_cYBnB#cyjD4ma{#wQMwJr)ME(Fou)rc%QFO?;+nPn;zKUN53l@`)Yz
zepCnl&NWrq%^$e3<q8|mOv{oE@U>~#v^Bub@Z)LO@~jv>n3g5?XYiycSyFRw`IJ;y
zGVpSDw$#Tzbk9h3PeZ;<e`#8H1MfrX@Cpg=A@>uCCoa4jri*zPBzM@I$|ID|p}?De
z;zM2r9Bt!>+O{!lwCF`Ev`6Ss3kZ9NunPylM(Fc@=ONg}n_xea)_Vht{{faY0(Olw
z!!58+2=XI^H6WF!Ag>=UOU%6uCJ}Dib+FtUT7o9phoC;X24<!gT117jxRQ}>D?*@J
zMdwipEPljqyOVJ1Ns;m41}#Dat1}`a+Gp*N`H`odT=0E_mHiI72Qp2vvINjHP%dZ*
z=q1o*&>NtgAU|jy=pd*)=$xG-)plS}(sK|}f;<d~kC1%}iQhkKgN%f{3Q0f4UP$~=
zvR@$apTveBvB}vWB>kY6+sdLLhH*AReg%oInVo>d=4O{5Cqi~X;>ptsQ&B2Jmmwep
r5rDvS5h_Xr=@L|kic$d<ypyw1Hg4Ur?e*EgvfO><_gg$%^8EHU%fH<P

delta 1924
zcmbVNdu&rx7(eH(-8$B-w`;q#tlPTMcH`lyFa%A&#b6vn9Z?b=$hJhORE<nB2N7YL
z1KnsQBL|hle>x%h2Z=#C>LtVk8H^3YOhm&Y>Qq8ba1aoQW3XL+-))DB{^w1;^Sz(<
zp6_04;}_d_w_Ev|e?DEeE%`2sv53~d<Ov63L7g!stEVy6WAdqN>)|H5q5BNFn2SXE
z>HWTl7H6^uA|icEs$!M8K+$qV$Wf}=8Plp@C|^ThIhZf%)FLsgI+bT~#XD*J3exA1
zK02w-7Eyan=BSmi!9H=>UdtQAgZVQ!6LtA3m0>Op<=63QG2KzG#1*m8Q3uU=M?G0N
z>y^V9;v;7r_lYquttPS3wSg~9oN+zGJv}@9Mju%Qp%0}?K5Z3`*^BLsnJSAMw6J|X
z*@1G9`nkeV-YecL3@byKVsBv(dA=>2%`3!sp}VDGhRSToBhkZgjLDWf*Hx7nXN@ZB
zSW?GZ$K30VwBD*+cc9;_K*svb8H8fqK&&ZXYCme}>*@``k99SLSog=|cURKPwz)_k
z-+;c44AT5oWeVQ{g9B3q;OA#dF#!Mm|K;09ES=s!CrXXYPxYBg^+yNeD9M&AMo%TI
z%bM3=dN!7uGB6sP97eGs?(?kUbHpA`m=7n;c=C9e(bDP(T{l{iD?!QT$p*U7Vj`pH
z6P`nPUb(Q`mNYA(*ZV{ZjgJ_h_R-qSS?Phww{=A7o-oovPj2m_?#)&iMTx0#yX7h}
znmXwTBhZw1W|<9pS!EbDv;V|Xt<v*PKqMDCimTkImYsozqo?E0+L8lZUPo+Eh4`_!
z(w<VD=-*PqY*6-82ye-J#S|1zl{72vpg37ly|e)3wq4S3!)(cuk<O}9s?jD$)2V!e
z?CWqIbET+$(=jI~T%{mh>ixHL-InZ=i-EOjv7+>z$7?3#k>h4{1MX#(M)7v%gVvrW
zrH713c92<cRhg6~#9KqEiBVF)QtrVJv?lRQ>1@7MjFrxM*$-*w*{`H(tbz{H%|Ke<
zo)namU?511p!AzQgM~x;u&wRaYv?|E2yP*Ww>@$PR1lPA3L)8@zjVFxnlu~PL*hMO
zfyYg92Lx!N28QKKqky}Yi7$OSU2{kqftN-)`4+w(ZJ~&i&ER{)wz9A?tcpWrmHeo<
zTo$J7;1BbQVwpdz#O-3Ezfv)ki@p9z&JySSr3w#-u|SwF7qf!1=G2rU-U~N$y=Mt1
z?71w1NbQF>lO0HvUKN`}V{oQzpEJEFDr5x)D|V?~b>TP-k0Sl_2fpkFVCWT%j%h8f
zv~8XoKx>127z!S33z>dEraiyo7@_O1{x*&$ui`jG)W8Ui_A59_?%+5_)Ssl?PR9vy
z+lo-KfwVEaJQ=!<<2t#GT*grjszC0)267Ye7J9+EC~=9{9tzrP;HdQyf0Z1Uj*HiW
zw4bxBzJhesR(UpYGnA7p)biH-_wH17#7(Zktj5Or=C#omk^C+#y5`PX^k}xqo(8-G
zSPys?@FCz+z!!kyfHQz!09OIG0hVbha{>H`@wr93<p-=)dX52e;FG}kWZ4a1YzsC7
zoC9nQsEn@eD0uv$*aUDcunIYT94rTzuAdJ$57-TC2L2g#`1aWaU~GAI1vnG<5-^^{
zMq)}ziKrMdBquT;V=9D_QbH<%5>Zl0;7fd8RZBA}TeJGrwet|~?tK15v&75=yDWlN
G|MoXo8l(*X

diff --git a/lib/isr.ppu b/lib/isr.ppu
index 9b42b9d8fc3854e487bbf2b924260de54f8c60b2..77834535db81e5587bfd3abcf40623fc8be1e8a0 100644
GIT binary patch
delta 69
zcmbQvH=S=n1BXgTd5dd{+^>xtu8ca2vdiW@vJBbJ00gX=#YM)(+kz)^NS-<S2_|A<
T@Ji|si`MyXe4BqV%CQ0fO}Q9B

delta 69
zcmbQvH=S=n1BZI>ez(N<(AbR~u8ca1wJJH)_FNTa00P#`;v!??jO*2|PWm1@VIn35
SJWDc-z4P;vH~(amV+8;RITfJ*

diff --git a/lib/isr0.ppu b/lib/isr0.ppu
index e4a07e3da5c1d99b3f3e8d4c15a36d400bd39dcc..3e777693ef8af5d6618419283a92978583b3a292 100644
GIT binary patch
literal 1977
zcmbVMO=wd=5Z-zDZ;Wlzq-xt#C^<E1tI|WM2dfP>q)AGCz~WD+ZLkm9q%<i~PfC08
zCI}vc7Q}-f9z?`z!IPliNqX|+MG*y0wNc`H^YUJsUQ(Q}li6=(XJ>Zi&E#b6^w}Z%
zDk+=Voa|E%TuOzrx7VU;y*qxTR0l7RgBOuqFE0(+A?5)3AZc!ZrxvHnLw9?ot^=|;
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z7RoQrua9hH0_{L;`fTO>@Y9KVZ`CvGy}Zcblxs^GZ(0F3Tjuo}ivms~L=bT{%-zC0
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diff --git a/lib/libpkernel.a b/lib/libpkernel.a
index 1c5a54f92bb62269bf3351ab6b72fc7af0f221d3..9632e6ad5d1f99824d427bf66e737754b6067832 100644
GIT binary patch
delta 404
zcmdnAk8#sJ#tCxF#+C*f6(=%+=*fXG;+xMfeq)AlHaTo!n%u|12jg$v#<7kQ%8}Sy
zFZ7uSCIeP!CjnC_F?qeB_vTF!n_vons-<~h=1NRHukOA1liVVN?0Ut&a1Kaz@-IcM
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delta 404
zcmdnAk8#sJ#tCxFM#g3v6(=%+=*fXG;+xMfeq)AlHaTo!n%u|12jg$v#<7kQ%8}Sy
zFZ7uSCIeP!CjnC_F?qeB_vTF!n_vons-<~h=1NRHukOA1liVVN?0Ut&a1Kaz@-IcM
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SLla9=0~27-Zw`!k$OHhR-ho&E

diff --git a/src/drivers/isr0.pas b/src/drivers/isr0.pas
index 66eb3ec5..bde37ab3 100644
--- a/src/drivers/isr0.pas
+++ b/src/drivers/isr0.pas
@@ -18,12 +18,23 @@ uses
     IDT;
 
 procedure register();
+procedure hook(hook_method : uint32);
+procedure unhook(hook_method : uint32);
 
 implementation
 
+var
+    Hooks : Array[1..MAX_HOOKS] of pp_hook_method;
+
 procedure Main(); interrupt;
+var
+    i : integer;
+
 begin
     CLI;
+    for i:=0 to MAX_HOOKS-1 do begin
+        if uint32(Hooks[i]) <> 0 then Hooks[i](nil);
+    end;
     console.writestringln('Divide by Zero Exception.');
     util.halt_and_catch_fire;
 end;
@@ -33,4 +44,27 @@ begin
     IDT.set_gate(0, uint32(@Main), $08, ISR_RING_0);
 end;
 
+procedure hook(hook_method : uint32);
+var
+    i : uint32;
+
+begin
+    for i:=0 to MAX_HOOKS-1 do begin
+        if uint32(Hooks[i]) = hook_method then exit;
+    end;
+    for i:=0 to MAX_HOOKS-1 do begin
+        if uint32(Hooks[i]) = 0 then Hooks[i]:= pp_hook_method(hook_method);
+    end;
+end;
+
+procedure unhook(hook_method : uint32);
+var
+    i : uint32;
+begin
+    for i:=0 to MAX_HOOKS-1 do begin
+        If uint32(Hooks[i]) = hook_method then Hooks[i]:= nil;
+        exit;
+    end;
+end;
+
 end.
\ No newline at end of file
diff --git a/src/drivers/isr32.pas b/src/drivers/isr32.pas
index 4955e63e..a724555a 100644
--- a/src/drivers/isr32.pas
+++ b/src/drivers/isr32.pas
@@ -14,13 +14,14 @@ interface
 uses
     util,
     console,
+    isr_types,
     IDT;
 
-type 
-    pp_void = procedure();
+//type 
+//    pp_void = procedure();
 
-var
-    procedure_ptr : pp_void = nil;
+//var
+//    procedure_ptr : pp_void = nil;
 
 procedure register();
 
@@ -28,21 +29,21 @@ implementation
 
 procedure Main; interrupt; //IRQ0, called every 55ms
 begin
-    if(procedure_ptr <> nil) then begin
-        procedure_ptr();
-    end;
+    //if(procedure_ptr <> nil) then begin
+        //procedure_ptr();
+    //end;
     outb($20, $20);
 end;
 
 procedure register();
 begin
     asm
-    mov al, $36
-    out $46, al
-    mov ax, 1165
-    out $40, al
-    mov al, ah
-    out $40, al
+        mov al, $36
+        out $46, al
+        mov ax, 1165
+        out $40, al
+        mov al, ah
+        out $40, al
     end;
     IDT.set_gate(32, uint32(@Main), $08, ISR_RING_0);
 end;
diff --git a/src/drivers/isr33.pas b/src/drivers/isr33.pas
index 28825574..9d8e6e62 100644
--- a/src/drivers/isr33.pas
+++ b/src/drivers/isr33.pas
@@ -14,6 +14,7 @@ interface
 uses
     util,
     console,
+    isr_types,
     IDT;
 
 type
diff --git a/src/drivers/isr40.pas b/src/drivers/isr40.pas
index b0364d83..89bc63fb 100644
--- a/src/drivers/isr40.pas
+++ b/src/drivers/isr40.pas
@@ -14,13 +14,11 @@ interface
 uses
     util,
     console,
+    isr_types,
     IDT;
 
-type 
-    pp_void = procedure();
-
-var
-    procedure_ptr : pp_void = nil;
+//var
+    //procedure_ptr : pp_void = nil;
 
 procedure register();
 
@@ -29,9 +27,9 @@ implementation
 procedure Main; interrupt; //IRQ0, called 1024 times a second.
 begin
     console.writestringln('helo3');
-    if(procedure_ptr <> nil) then begin
-        procedure_ptr();
-    end;
+    //if(procedure_ptr <> nil) then begin
+    //    procedure_ptr();
+    //end;
     outb($A0, $20);
     outb($20, $20);
 end;
diff --git a/src/drivers/isr_types.pas b/src/drivers/isr_types.pas
index ca6e782c..f87ea073 100644
--- a/src/drivers/isr_types.pas
+++ b/src/drivers/isr_types.pas
@@ -11,12 +11,18 @@ unit isr_types;
 
 interface
 
+const
+    MAX_HOOKS = 16;
+
 type
     ISR_REGS = record
         ip, cs, flags, sp, ss : uint16;
     end;
 	PISR_REGS = ^ISR_REGS;
 
+    pp_hook_method = procedure(data : void);
+    pp_void = pp_hook_method;
+
 implementation
 
 end.
\ No newline at end of file