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Import backup from 2004-06-07

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This commit is contained in:
Josh Holtrop 2004-06-07 22:00:00 -04:00
parent b5ba5b63fe
commit 802a07ebfe
13 changed files with 1399 additions and 17 deletions
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6
Makefile
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@ -1,6 +1,6 @@
##################################################################### #####################################################################
# Author: Josh Holtrop / Benjamen R. Meyer # # Author: Josh Holtrop / Benjamen R. Meyer #
# Date: 02/15/04 Modified: 05/21/04 # # Date: 02/15/04 Modified: 06/07/04 #
# Purpose: To build Josh Holtrop's OS (HOS) using GNU make # # Purpose: To build Josh Holtrop's OS (HOS) using GNU make #
# Note: This makefile is for use on Linux & other Unix-like systems # # Note: This makefile is for use on Linux & other Unix-like systems #
##################################################################### #####################################################################
@ -34,8 +34,8 @@ all:
@echo "Type 'make install' to install to a floppy in drive '/dev/fd0'" @echo "Type 'make install' to install to a floppy in drive '/dev/fd0'"
@echo "Type 'make install_img' to create a floppy image and install to it." @echo "Type 'make install_img' to create a floppy image and install to it."
cd boot; make make -C boot
cd kernel; make make -C kernel
################################################# #################################################
# Clean up the source directory of any binaries # # Clean up the source directory of any binaries #

2
boot/Makefile
View File

@ -29,4 +29,4 @@ stage2: stage2.asm
# Clean # # Clean #
######### #########
clean: clean:
- rm *.bin - rm *.bin *~

8
kernel/Makefile
View File

@ -1,6 +1,6 @@
##################################################################### #####################################################################
# Author: Josh Holtrop / Benjamen R. Meyer # # Author: Josh Holtrop / Benjamen R. Meyer #
# Date: 02/15/04 Modified: 05/21/04 # # Date: 02/15/04 Modified: 06/07/04 #
# Purpose: To build Josh Holtrop's OS (HOS) using GNU make # # Purpose: To build Josh Holtrop's OS (HOS) using GNU make #
# Note: This makefile is for use on Linux & other Unix-like systems # # Note: This makefile is for use on Linux & other Unix-like systems #
##################################################################### #####################################################################
@ -30,7 +30,7 @@ LD_FLAGS=-nodefaultlibs -nostdlib --no-demangle -T link.ld
# Linking the kernel together # # Linking the kernel together #
############################### ###############################
all: Asm_Kernel Asm_Functions C_Kernel all: Asm_Kernel Asm_Functions C_Kernel
$(LD) $(LD_FLAGS) -o kernel.bin -Map ./lst/LDout.doc ks.o kernel.o asmfuncs.o fdc.o keyboard.o kio.o mm.o mouse.o stdfont.o video.o vmm.o rtc.o pic.o io.o cstring.o string.o cmos.o hos_defines.o vfs.o devfs.o $(LD) $(LD_FLAGS) -o kernel.bin -Map ./lst/LDout.doc ks.o kernel.o asmfuncs.o fdc.o keyboard.o kio.o mm.o mouse.o stdfont.o video.o vmm.o rtc.o pic.o io.o cstring.o string.o cmos.o hos_defines.o vfs.o devfs.o Device.o DeviceFolder.o
########################## ##########################
# Assembly Kernel Loader # # Assembly Kernel Loader #
@ -66,9 +66,11 @@ C_Kernel:
$(CPP) $(CPP_FLAGS) -c hos_defines.cpp -o hos_defines.o $(CPP) $(CPP_FLAGS) -c hos_defines.cpp -o hos_defines.o
$(CPP) $(CPP_FLAGS) -c fs/vfs.cpp -o vfs.o $(CPP) $(CPP_FLAGS) -c fs/vfs.cpp -o vfs.o
$(CPP) $(CPP_FLAGS) -c fs/devfs.cpp -o devfs.o $(CPP) $(CPP_FLAGS) -c fs/devfs.cpp -o devfs.o
$(CPP) $(CPP_FLAGS) -c fs/Device.cpp -o Device.o
$(CPP) $(CPP_FLAGS) -c fs/DeviceFolder.cpp -o DeviceFolder.o
################################################# #################################################
# Clean up the source directory of any binaries # # Clean up the source directory of any binaries #
################################################# #################################################
clean: clean:
- rm *.o ./lst/*.lst ./lst/*.doc *.bin - rm *.s *.o *.bin *~ block/*~ char/*~ fs/*~ lang/*~ mm/*~ sys/*~ video/*~

17
kernel/fs/Device.h
View File

@ -10,17 +10,28 @@
#include "hos_defines.h" #include "hos_defines.h"
#include "lang/string.h" #include "lang/string.h"
#include "lang/LinkedList.h"
#define DEVICE_FOLDER 0
#define DEVICE_BLOCK 1
#define DEVICE_CHAR 2
#define DEVICE_LINK 3
class Device class Device
{ {
private: private:
union
{
dword myMajor; dword myMajor;
LinkedList<Device> *folder;
string *link;
};
dword myMinor; dword myMinor;
char myType; //'d'irectory,'l'ink,'b'lock,'c'har,'a'vail word permissions; //9-bit permissions | (type << 12)
string myName; string myName;
public: public:
Device(); // Device();
Device(string name, dword major, dword minor, char type); // Device(string name, dword major, dword minor, char type);
}; };
#endif #endif

3
kernel/fs/DeviceFolder.h
View File

@ -9,13 +9,14 @@
#define __HOS_DEVICEFOLDER__ __HOS_DEVICEFOLDER__ #define __HOS_DEVICEFOLDER__ __HOS_DEVICEFOLDER__
#include "lang/LinkedList.h" #include "lang/LinkedList.h"
#include "Device.h"
class DeviceFolder class DeviceFolder
{ {
public: public:
LinkedList<Device> devices; LinkedList<Device> devices;
LinkedList<DeviceFolder> folders; LinkedList<DeviceFolder> folders;
DeviceFolder(); // DeviceFolder();
}; };
#endif #endif

5
kernel/fs/devfs.cpp
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@ -6,11 +6,14 @@
// Modified: 06/03/04 // Modified: 06/03/04
#include "devfs.h" #include "devfs.h"
#include "Device.h"
#include "DeviceFolder.h"
DeviceFolder *dev;
void devfs_init() void devfs_init()
{ {
dev = new DeviceFolder();
} }

2
kernel/fs/devfs.h
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@ -8,6 +8,8 @@
#ifndef __HOS_DEVFS__ #ifndef __HOS_DEVFS__
#define __HOS_DEVFS__ __HOS_DEVFS__ #define __HOS_DEVFS__ __HOS_DEVFS__
#include "Device.h"
void devfs_init(); void devfs_init();

5
kernel/lang/LinkedList.h
View File

@ -5,6 +5,9 @@
// Date: 05/22/04 // Date: 05/22/04
// Modified: 06/03/04 // Modified: 06/03/04
#ifndef __HOS_LINKEDLIST__
#define __HOS_LINKEDLIST__ __HOS_LINKEDLIST__
template <typename Element> template <typename Element>
class LinkedList class LinkedList
{ {
@ -199,3 +202,5 @@ Element & LinkedList<Element>::operator[](int index)
} }
#endif

6
kernel/lang/string.cpp
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@ -3,7 +3,7 @@
// implements c++ string object for HOS // implements c++ string object for HOS
// Author: Josh Holtrop // Author: Josh Holtrop
// Date: 06/01/04 // Date: 06/01/04
// Modified: 06/01/04 // Modified: 06/07/04
#include "string.h" //string class declaration #include "string.h" //string class declaration
#include "asmfuncs.h" //memcpy(void *dest, void *src, int n), strlen(char *str) #include "asmfuncs.h" //memcpy(void *dest, void *src, int n), strlen(char *str)
@ -198,14 +198,14 @@ string::string(char chr, const string & str1)
const char & string::operator[](unsigned int index) const const char & string::operator[](unsigned int index) const
{ {
if (index >= 0 && index < myLength) if (index < myLength)
return myChars[index]; return myChars[index];
return *myChars; //if index is invalid, return a pointer to the trailing 0 return *myChars; //if index is invalid, return a pointer to the trailing 0
} }
char & string::operator[](unsigned int index) char & string::operator[](unsigned int index)
{ {
if (index >= 0 && index < myLength) if (index < myLength)
return myChars[index]; return myChars[index];
return *myChars; //if index is invalid, return a pointer to the trailing 0 return *myChars; //if index is invalid, return a pointer to the trailing 0
} }

2
kernel/lang/string.h
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@ -3,7 +3,7 @@
// implements c++ string object for HOS // implements c++ string object for HOS
// Author: Josh Holtrop // Author: Josh Holtrop
// Date: 06/01/04 // Date: 06/01/04
// Modified: 06/03/04 // Modified: 06/07/04
#ifndef __HOS_STRING__ #ifndef __HOS_STRING__

356
kernel/lst/LDout.doc Normal file
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@ -0,0 +1,356 @@
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LOAD ks.o
LOAD kernel.o
LOAD asmfuncs.o
LOAD fdc.o
LOAD keyboard.o
LOAD kio.o
LOAD mm.o
LOAD mouse.o
LOAD stdfont.o
LOAD video.o
LOAD vmm.o
LOAD rtc.o
LOAD pic.o
LOAD io.o
LOAD cstring.o
LOAD string.o
LOAD cmos.o
LOAD hos_defines.o
LOAD vfs.o
LOAD devfs.o
LOAD Device.o
LOAD DeviceFolder.o
OUTPUT(kernel.bin binary)
.note.GNU-stack
0x0000000000000000 0x0
.comment 0x0000000000000000 0x3fc
.comment 0x0000000000000000 0x33 kernel.o
.comment 0x0000000000000033 0x33 fdc.o
.comment 0x0000000000000066 0x33 keyboard.o
.comment 0x0000000000000099 0x33 kio.o
.comment 0x00000000000000cc 0x33 mm.o
.comment 0x00000000000000ff 0x33 mouse.o
.comment 0x0000000000000132 0x33 stdfont.o
.comment 0x0000000000000165 0x33 video.o
.comment 0x0000000000000198 0x33 vmm.o
.comment 0x00000000000001cb 0x33 rtc.o
.comment 0x00000000000001fe 0x33 pic.o
.comment 0x0000000000000231 0x33 io.o
.comment 0x0000000000000264 0x33 cstring.o
.comment 0x0000000000000297 0x33 string.o
.comment 0x00000000000002ca 0x33 cmos.o
.comment 0x00000000000002fd 0x33 hos_defines.o
.comment 0x0000000000000330 0x33 vfs.o
.comment 0x0000000000000363 0x33 devfs.o
.comment 0x0000000000000396 0x33 Device.o
.comment 0x00000000000003c9 0x33 DeviceFolder.o

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1 ; asmfuncs.asm
2 ; Josh Holtrop
3 ; Created: 10/23/03
4 ; Modified: 02/26/04
5
6 [extern _putc]
7 [extern _console_memory]
8 [extern _cursorPosition]
9 [extern _video_drawConsole]
10 [extern _videoMode]
11
12 %macro jzfar 1
13 jnz %%skip
14 jmp %1
15 %%skip:
16
17 %endmacro
18
19 ;stores the parameter to the CR0 register
20 ;extern dword write_cr0(dword cr0);
21 [global _write_cr0]
22 _write_cr0:
23 00000000 55 push ebp
24 00000001 89E5 mov ebp, esp
25 00000003 8B4508 mov eax, [ebp+8]
26 00000006 0F22C0 mov cr0, eax
27 00000009 5D pop ebp
28 0000000A C3 ret
29
30 ;returns the value in the CR0 register
31 ;extern dword read_cr0();
32 [global _read_cr0]
33 _read_cr0:
34 0000000B 0F20C0 mov eax, cr0;
35 0000000E C3 ret
36
37 ;stores the parameter to the CR3 register
38 ;extern dword write_cr3(dword cr3);
39 [global _write_cr3]
40 _write_cr3:
41 0000000F 55 push ebp
42 00000010 89E5 mov ebp, esp
43 00000012 8B4508 mov eax, [ebp+8]
44 00000015 0F22D8 mov cr3, eax
45 00000018 5D pop ebp
46 00000019 C3 ret
47
48
49 ;returns the value in the CR2 register
50 ;extern dword read_cr2();
51 [global _read_cr2]
52 _read_cr2:
53 0000001A 0F20D0 mov eax, cr2;
54 0000001D C3 ret
55
56
57
58 ;returns the value in the CR3 register
59 ;extern dword read_cr3();
60 [global _read_cr3]
61 _read_cr3:
62 0000001E 0F20D8 mov eax, cr3;
63 00000021 C3 ret
64
65
66 ;compares one string to another
67 ;returns 0 if the strings are different
68 ;extern dword strcmp(char *str1, char *str2);
69 [global _strcmp]
70 _strcmp:
71 00000022 55 push ebp
72 00000023 89E5 mov ebp, esp
73 00000025 56 push esi
74 00000026 57 push edi
75
76 00000027 8B7508 mov esi, [ebp+8]
77 0000002A 8B7D0C mov edi, [ebp+12]
78 strcmp_loop1:
79 0000002D AC lodsb
80 0000002E 8A27 mov ah, [edi]
81 00000030 47 inc edi
82 00000031 38C4 cmp ah, al
83 00000033 750D jnz strcmp_ne
84 00000035 08C0 or al, al
85 00000037 7402 jz strcmp_e
86 00000039 EBF2 jmp strcmp_loop1
87 strcmp_e:
88 0000003B B801000000 mov eax, 1
89 00000040 EB02 jmp short strcmp_done
90 strcmp_ne:
91 00000042 31C0 xor eax, eax
92 strcmp_done:
93
94 00000044 5F pop edi
95 00000045 5E pop esi
96 00000046 5D pop ebp
97 00000047 C3 ret
98
99 ;copies a string from the source to the destination parameter
100 ;extern void strcpy(char *dest, char *src);
101 [global _strcpy]
102 _strcpy:
103 00000048 55 push ebp
104 00000049 89E5 mov ebp, esp
105 0000004B 56 push esi
106 0000004C 57 push edi
107 0000004D 8B7D08 mov edi, [ebp+8]
108 00000050 8B750C mov esi, [ebp+12]
109 strcpyloop:
110 00000053 AC lodsb
111 00000054 AA stosb
112 00000055 08C0 or al, al
113 00000057 75FA jnz strcpyloop
114 00000059 5F pop edi
115 0000005A 5E pop esi
116 0000005B 5D pop ebp
117 0000005C C3 ret
118
119 ;copies memory of n bytes from src to destination
120 ;void memcpy(void *dest, void *src, dword n);
121 [global _memcpy]
122 _memcpy:
123 0000005D 55 push ebp
124 0000005E 89E5 mov ebp, esp
125 00000060 56 push esi
126 00000061 57 push edi
127 00000062 51 push ecx
128 00000063 8B7D08 mov edi, [ebp+8]
129 00000066 8B750C mov esi, [ebp+12]
130 00000069 8B4D10 mov ecx, [ebp+16]
131
132 0000006C FC cld
133 0000006D F3A4 rep movsb
134
135 0000006F 59 pop ecx
136 00000070 5F pop edi
137 00000071 5E pop esi
138 00000072 5D pop ebp
139 00000073 C3 ret
140
141
142 ;copies memory of n dwords (n*4 bytes) from src to destination
143 ;void memcpyd(void *dest, void *src, dword n);
144 [global _memcpyd]
145 _memcpyd:
146 00000074 55 push ebp
147 00000075 89E5 mov ebp, esp
148 00000077 56 push esi
149 00000078 57 push edi
150 00000079 51 push ecx
151 0000007A 8B7D08 mov edi, [ebp+8]
152 0000007D 8B750C mov esi, [ebp+12]
153 00000080 8B4D10 mov ecx, [ebp+16]
154
155 00000083 FC cld
156 00000084 F3A5 rep movsd
157
158 00000086 59 pop ecx
159 00000087 5F pop edi
160 00000088 5E pop esi
161 00000089 5D pop ebp
162 0000008A C3 ret
163
164
165 ;sets num bytes at buffer to the value of c
166 ;void *memset(void *buffer, int c, int num);
167 [global _memset]
168 _memset:
169 0000008B 55 push ebp
170 0000008C 89E5 mov ebp, esp
171 0000008E 57 push edi
172 0000008F 51 push ecx
173 00000090 8B7D08 mov edi, [ebp+8]
174 00000093 57 push edi ;save for return address
175 00000094 8B450C mov eax, [ebp+12]
176 00000097 8B4D10 mov ecx, [ebp+16]
177
178 0000009A F3AA rep stosb
179
180 0000009C 58 pop eax
181 0000009D 59 pop ecx
182 0000009E 5F pop edi
183 0000009F 5D pop ebp
184 000000A0 C3 ret
185
186
187 ;sets num words at buffer to the value of c
188 ;void *memsetw(void *buffer, int c, int num);
189 [global _memsetw]
190 _memsetw:
191 000000A1 55 push ebp
192 000000A2 89E5 mov ebp, esp
193 000000A4 57 push edi
194 000000A5 51 push ecx
195 000000A6 8B7D08 mov edi, [ebp+8]
196 000000A9 57 push edi ;save for return address
197 000000AA 8B450C mov eax, [ebp+12]
198 000000AD 8B4D10 mov ecx, [ebp+16]
199
200 000000B0 F366AB rep stosw
201
202 000000B3 58 pop eax
203 000000B4 59 pop ecx
204 000000B5 5F pop edi
205 000000B6 5D pop ebp
206 000000B7 C3 ret
207
208
209 ;sets num dwords at buffer to the value of c
210 ;void *memsetd(void *buffer, int c, int num);
211 [global _memsetd]
212 _memsetd:
213 000000B8 55 push ebp
214 000000B9 89E5 mov ebp, esp
215 000000BB 57 push edi
216 000000BC 51 push ecx
217 000000BD 8B7D08 mov edi, [ebp+8]
218 000000C0 57 push edi ;save for return address
219 000000C1 8B450C mov eax, [ebp+12]
220 000000C4 8B4D10 mov ecx, [ebp+16]
221
222 000000C7 F3AB rep stosd
223
224 000000C9 58 pop eax
225 000000CA 59 pop ecx
226 000000CB 5F pop edi
227 000000CC 5D pop ebp
228 000000CD C3 ret
229
230
231 ;returns the number of characters in a string
232 ;extern dword strlen(char *str);
233 [global _strlen]
234 _strlen:
235 000000CE 55 push ebp
236 000000CF 89E5 mov ebp, esp
237 000000D1 56 push esi
238 000000D2 53 push ebx
239 000000D3 8B7508 mov esi, [ebp+8]
240 000000D6 31DB xor ebx, ebx
241 strlenloop:
242 000000D8 AC lodsb
243 000000D9 08C0 or al, al
244 000000DB 7403 jz strlendone
245 000000DD 43 inc ebx
246 000000DE EBF8 jmp strlenloop
247 strlendone:
248 000000E0 89D8 mov eax, ebx
249 000000E2 5B pop ebx
250 000000E3 5E pop esi
251 000000E4 5D pop ebp
252 000000E5 C3 ret
253
254 ;this function invalidates the page directory/table entry that
255 ; would be used to access the memory address given in the parameter
256 ;extern void invlpg_(dword addr);
257 [global _invlpg_]
258 _invlpg_:
259 000000E6 8B442404 mov eax, [esp+4]
260 000000EA 0F0138 invlpg [eax]
261 000000ED C3 ret
262
263
264 ;
265 ;void writeCursorPosition(word pos)
266 ;
267 [global _writeCursorPosition]
268 _writeCursorPosition:
269 000000EE 55 push ebp
270 000000EF 89E5 mov ebp, esp
271
272 000000F1 50 push eax
273 000000F2 53 push ebx
274 000000F3 52 push edx
275
276 000000F4 8B4508 mov eax, [ebp+8] ;cursor position in ax
277
278 000000F7 88C3 mov bl, al
279 000000F9 66BAD403 mov dx, 0x03D4
280 000000FD B00E mov al, 0x0E
281 000000FF EE out dx, al
282
283 00000100 6642 inc dx
284 00000102 88E0 mov al, ah
285 00000104 EE out dx, al
286
287 00000105 664A dec dx
288 00000107 B00F mov al, 0x0F
289 00000109 EE out dx, al
290
291 0000010A 6642 inc dx
292 0000010C 88D8 mov al, bl
293 0000010E EE out dx, al
294
295 0000010F 5A pop edx
296 00000110 5B pop ebx
297 00000111 58 pop eax
298 00000112 5D pop ebp
299
300 00000113 C3 ret
301
302
303 ;
304 ;word getCursorPosition()
305 ;
306 [global _getCursorPosition]
307 _getCursorPosition:
308 00000114 53 push ebx
309 00000115 52 push edx
310
311 00000116 31C0 xor eax, eax
312 00000118 66BAD403 mov dx, 0x03D4
313 0000011C B00E mov al, 0x0E
314 0000011E EE out dx, al
315
316 0000011F 6642 inc dx
317 00000121 EC in al, dx
318 00000122 88C3 mov bl, al
319
320 00000124 664A dec dx
321 00000126 B00F mov al, 0x0F
322 00000128 EE out dx, al
323
324 00000129 6642 inc dx
325 0000012B EC in al, dx
326 0000012C 88DC mov ah, bl
327
328 0000012E 5A pop edx
329 0000012F 5B pop ebx
330
331 00000130 C3 ret
332
333
334 ;
335 ;int puts(char *str)
336 ;
337 [global _puts]
338 _puts:
339 00000131 55 push ebp
340 00000132 89E5 mov ebp, esp
341 00000134 56 push esi
342 00000135 50 push eax
343 00000136 8B7508 mov esi, [ebp+8] ;esi = to string
344 puts_loop:
345 00000139 AC lodsb
346 0000013A 3C00 cmp al, 0
347 0000013C 740E jz puts_done
348 0000013E 50 push eax
349 0000013F E8(00000000) call _putc
350 00000144 81C404000000 add esp, 4
351 0000014A EBED jmp puts_loop
352
353 puts_done:
354 0000014C 58 pop eax
355 0000014D 5E pop esi
356 0000014E 5D pop ebp
357 0000014F C3 ret
358
359
360
361
362 [global _putDecu]
363 _putDecu:
364 00000150 55 push ebp
365 00000151 89E5 mov ebp, esp
366 00000153 81EC18000000 sub esp, 24
367 00000159 C745FC01000000 mov DWORD [ebp-4], 1
368 00000160 C645FB00 mov BYTE [ebp-5], 0
369 L2:
370 00000164 8B5508 mov edx, DWORD [ebp+8]
371 00000167 B8CDCCCCCC mov eax, -858993459
372 0000016C F7E2 mul edx
373 0000016E 89D0 mov eax, edx
374 00000170 C1E803 shr eax, 3
375 00000173 3B45FC cmp eax, DWORD [ebp-4]
376 00000176 7305 jae L4
377 00000178 E912000000 jmp L3
378 L4:
379 0000017D 8B45FC mov eax, DWORD [ebp-4]
380 00000180 89C2 mov edx, eax
381 00000182 C1E202 sal edx, 2
382 00000185 01C2 add edx, eax
383 00000187 8D0412 lea eax, [edx+edx]
384 0000018A 8945FC mov DWORD [ebp-4], eax
385 0000018D EBD5 jmp L2
386 L3:
387 0000018F 90 nop
388 L5:
389 00000190 817DFC01000000 cmp DWORD [ebp-4], 1
390 00000197 7705 ja L7
391 00000199 E959000000 jmp L6
392 L7:
393 0000019E 8B5508 mov edx, DWORD [ebp+8]
394 000001A1 89D0 mov eax, edx
395 000001A3 BA00000000 mov edx, 0
396 000001A8 F775FC div DWORD [ebp-4]
397 000001AB 8945F4 mov DWORD [ebp-12], eax
398 000001AE 8A45F4 mov al, BYTE [ebp-12]
399 000001B1 8845FB mov BYTE [ebp-5], al
400 000001B4 B800000000 mov eax, 0
401 000001B9 8A45FB mov al, BYTE [ebp-5]
402 000001BC 0FAF45FC imul eax, DWORD [ebp-4]
403 000001C0 294508 sub DWORD [ebp+8], eax
404 000001C3 8B55FC mov edx, DWORD [ebp-4]
405 000001C6 B8CDCCCCCC mov eax, -858993459
406 000001CB F7E2 mul edx
407 000001CD 89D0 mov eax, edx
408 000001CF C1E803 shr eax, 3
409 000001D2 8945FC mov DWORD [ebp-4], eax
410 000001D5 8D45FB lea eax, [ebp-5]
411 000001D8 800030 add BYTE [eax], 48
412 000001DB 81EC0C000000 sub esp, 12
413 000001E1 B800000000 mov eax, 0
414 000001E6 8A45FB mov al, BYTE [ebp-5]
415 000001E9 50 push eax
416 000001EA E8(00000000) call _putc
417 000001EF 81C410000000 add esp, 16
418 000001F5 EB99 jmp L5
419 L6:
420 000001F7 81EC0C000000 sub esp, 12
421 000001FD 8A4508 mov al, BYTE [ebp+8]
422 00000200 0530000000 add eax, 48
423 00000205 25FF000000 and eax, 255
424 0000020A 50 push eax
425 0000020B E8(00000000) call _putc
426 00000210 81C410000000 add esp, 16
427 00000216 C9 leave
428 00000217 C3 ret
429
430
431
432
433 [global _putDec]
434 _putDec:
435 00000218 55 push ebp
436 00000219 89E5 mov ebp, esp
437 0000021B 81EC18000000 sub esp, 24
438 00000221 817D0800000000 cmp DWORD [ebp+8], 0
439 00000228 7919 jns L9
440 0000022A 81EC0C000000 sub esp, 12
441 00000230 682D000000 push 45
442 00000235 E8(00000000) call _putc
443 0000023A 81C410000000 add esp, 16
444 00000240 F75D08 neg DWORD [ebp+8]
445 L9:
446 00000243 C745FC01000000 mov DWORD [ebp-4], 1
447 0000024A C645FB00 mov BYTE [ebp-5], 0
448 L10:
449 0000024E 8B4508 mov eax, DWORD [ebp+8]
450 00000251 3B45FC cmp eax, DWORD [ebp-4]
451 00000254 7305 jae L12
452 00000256 E912000000 jmp L11
453 L12:
454 0000025B 8B45FC mov eax, DWORD [ebp-4]
455 0000025E 89C2 mov edx, eax
456 00000260 C1E202 sal edx, 2
457 00000263 01C2 add edx, eax
458 00000265 8D0412 lea eax, [edx+edx]
459 00000268 8945FC mov DWORD [ebp-4], eax
460 0000026B EBE1 jmp L10
461 L11:
462 0000026D 8B55FC mov edx, DWORD [ebp-4]
463 00000270 B8CDCCCCCC mov eax, -858993459
464 00000275 F7E2 mul edx
465 00000277 89D0 mov eax, edx
466 00000279 C1E803 shr eax, 3
467 0000027C 8945FC mov DWORD [ebp-4], eax
468 L13:
469 0000027F 817DFC01000000 cmp DWORD [ebp-4], 1
470 00000286 7705 ja L15
471 00000288 E959000000 jmp L14
472 L15:
473 0000028D 8B5508 mov edx, DWORD [ebp+8]
474 00000290 89D0 mov eax, edx
475 00000292 BA00000000 mov edx, 0
476 00000297 F775FC div DWORD [ebp-4]
477 0000029A 8945F4 mov DWORD [ebp-12], eax
478 0000029D 8A45F4 mov al, BYTE [ebp-12]
479 000002A0 8845FB mov BYTE [ebp-5], al
480 000002A3 B800000000 mov eax, 0
481 000002A8 8A45FB mov al, BYTE [ebp-5]
482 000002AB 0FAF45FC imul eax, DWORD [ebp-4]
483 000002AF 294508 sub DWORD [ebp+8], eax
484 000002B2 8B55FC mov edx, DWORD [ebp-4]
485 000002B5 B8CDCCCCCC mov eax, -858993459
486 000002BA F7E2 mul edx
487 000002BC 89D0 mov eax, edx
488 000002BE C1E803 shr eax, 3
489 000002C1 8945FC mov DWORD [ebp-4], eax
490 000002C4 8D45FB lea eax, [ebp-5]
491 000002C7 800030 add BYTE [eax], 48
492 000002CA 81EC0C000000 sub esp, 12
493 000002D0 B800000000 mov eax, 0
494 000002D5 8A45FB mov al, BYTE [ebp-5]
495 000002D8 50 push eax
496 000002D9 E8(00000000) call _putc
497 000002DE 81C410000000 add esp, 16
498 000002E4 EB99 jmp L13
499 L14:
500 000002E6 81EC0C000000 sub esp, 12
501 000002EC 8A4508 mov al, BYTE [ebp+8]
502 000002EF 0530000000 add eax, 48
503 000002F4 25FF000000 and eax, 255
504 000002F9 50 push eax
505 000002FA E8(00000000) call _putc
506 000002FF 81C410000000 add esp, 16
507 00000305 C9 leave
508 00000306 C3 ret
509
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1 ;kernel.asm
2 ;Author: Josh Holtrop
3 ;Date: 10/30/03
4 ;Modified: 10/30/03
5
6 %define GDT_P 0x100000; ;1mb physical - Global Descriptor Table space
7 %define GDT_V GDT_P+0xC0000000
8 %define IDT_P 0x102000 ;1mb+8kb - Interrupt Descriptor Table space
9 %define IDT_V IDT_P+0xC0000000
10 %define PDBR_P 0x104000 ;1mb+16kb - Page Directory Base Register (first PD)
11 %define PDBR_V PDBR_P+0xC0000000
12 %define LOPT_P 0x105000 ;1mb+20kb - LOw Page Table for mapping first 4mb
13 %define LOPT_V LOPT_P+0xC0000000
14 %define KERNEL_P 0x106000 ;1mb+24kb - the kernel's physical address
15 %define KERNEL_V KERNEL_P+0xC0000000 ;3gb+1mb+24kb, the virtual address of the kernel
16
17 [global _start]
18 [extern _isr]
19 [extern _k_init]
20 [extern _putc]
21
22 bits 32
23
24 ;This is where the kernel begins execution
25 ;At this point, the temporary gdt is set up to "map" 0xC000_0000 to 0x0.
26 ;We must enable paging with the first 4mb mapped 1:1 virtual:physical
27 ; and with the 4mb starting at 0xC000_0000 mapped to the first 4mb physical.
28 ;Then we can start using our "real" gdt, then unmap the lower 4mb.
29 _start:
30 00000000 FA cli ;if they weren't already off
31
32 00000001 31C0 xor eax, eax
33 00000003 BF004010C0 mov edi, PDBR_V
34 00000008 B900040000 mov ecx, 1024 ;clear the PDBR
35 0000000D F3AB rep stosd
36 0000000F C705004010C0035010- mov [PDBR_V], dword LOPT_P|0x03 ;store the physical address of the LOw Page Table (read/write, present)
37 00000018 00
38 00000019 C705004C10C0035010- mov [PDBR_V+0xC00], dword LOPT_P|0x03 ;store the physical address of the LOw Page Table (read/write, present)
39 00000022 00
40
41 00000023 BF005010C0 mov edi, LOPT_V
42 00000028 B900040000 mov ecx, 1024
43 0000002D B803000000 mov eax, 0x03 ;starting physical address = 0x0 (read/write, present flags)
44 fill_lopt_loop: ;fill the page table
45 00000032 AB stosd
46 00000033 0500100000 add eax, 4096 ;increment next phsyical address by 4kb
47 00000038 E2F8 loop fill_lopt_loop
48
49 0000003A B800401000 mov eax, PDBR_P
50 0000003F 0F22D8 mov cr3, eax ;store the Page Directory Base Address
51 00000042 0F20C0 mov eax, cr0
52 00000045 0D00000080 or eax, 0x80000000 ;set page enable bit
53 0000004A 0F22C0 mov cr0, eax ;now paging is active!
54
55
56 0000004D BF000010C0 mov edi, GDT_V
57 00000052 BE[D4000000] mov esi, gdt
58 00000057 B948000000 mov ecx, gdt_end-gdt
59 copy_gdt:
60 0000005C AC lodsb
61 0000005D AA stosb
62 0000005E E2FC loop copy_gdt
63
64 00000060 BF002010C0 mov edi, IDT_V ;destination
65 00000065 BE[22010000] mov esi, isr_0 ;address of isr0
66 0000006A BA0B000000 mov edx, isr_1-isr_0 ;distance between isr labels
67 0000006F B932000000 mov ecx, 50 ;number of isrlabels
68 fill_idt:
69 00000074 89F3 mov ebx, esi
70 00000076 6689F0 mov ax, si
71 00000079 66AB stosw ;0 offset 15:0
72 0000007B 66B80800 mov ax, KERNEL_CODE
73 0000007F 66AB stosw ;2 selector 15:0
74 00000081 66B8008E mov ax, 0x8E00
75 00000085 66AB stosw ;4 [P][DPL][0][TYPE][0][0][0][0][0][0][0][0]
76 00000087 C1EE10 shr esi, 16
77 0000008A 6689F0 mov ax, si
78 0000008D 66AB stosw ;6 offset 31:16
79 0000008F 89DE mov esi, ebx
80 00000091 01D6 add esi, edx
81 00000093 E2DF loop fill_idt
82 00000095 66C705842110C000EE mov word [IDT_V+0x30*8+4], 0xEE00 ;interrupt 0x30 has user priviledges
83
84 0000009E 0F0115[CE000000] lgdt [gdtr] ;load gdt
85 000000A5 EA[AC000000]0800 jmp KERNEL_CODE:newgdtcontinue
86 newgdtcontinue:
87 000000AC 66B81000 mov ax, KERNEL_DATA
88 000000B0 8EC0 mov es, ax
89 000000B2 8ED8 mov ds, ax
90 000000B4 8EE8 mov gs, ax
91 000000B6 8EE0 mov fs, ax
92 000000B8 8ED0 mov ss, ax
93 000000BA BC000020C0 mov esp, 0xc0200000 ;stack just under 3gb+2mb, moves downward
94 000000BF 0F011D[1C010000] lidt [idtr] ;load idt
95
96 000000C6 E8(00000000) call _k_init
97 haltit:
98 000000CB F4 hlt ;halt processor when k_init is done
99 000000CC EBFD jmp haltit ;shouldn't get here...
100
101 %include "gdt.inc"
102 <1> ;gdt.inc
103 <1> ;Author: Josh Holtrop
104 <1> ;Date: 10/30/03
105 <1> ;Modified: 03/02/04
106 <1>
107 <1> gdtr:
108 000000CE 4700 <1> dw gdt_end-gdt-1
109 000000D0 000010C0 <1> dd GDT_V
110 <1> gdt:
111 000000D4 00000000 <1> dd 0
112 000000D8 00000000 <1> dd 0
113 <1> KERNEL_CODE equ $-gdt
114 000000DC FFFF <1> dw 0xffff ;limit 15:0
115 000000DE 0000 <1> dw 0x0000 ;base 15:0
116 000000E0 00 <1> db 0x00 ;base 23:16
117 000000E1 9A <1> db 0x9A ;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
118 000000E2 CF <1> db 0xCF ;flags ([G][D/B][0][0]) / limit 19:16
119 000000E3 00 <1> db 0x00 ;base 31:24
120 <1> KERNEL_DATA equ $-gdt
121 000000E4 FFFF <1> dw 0xffff ;limit 15:0
122 000000E6 0000 <1> dw 0x0000 ;base 15:0
123 000000E8 00 <1> db 0x00 ;base 23:16
124 000000E9 92 <1> db 0x92 ;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
125 000000EA CF <1> db 0xCF ;flags ([G][D/B][0][0]) / limit 19:16
126 000000EB 00 <1> db 0x00 ;base 31:24
127 <1> USER_CODE equ $-gdt
128 000000EC FFFF <1> dw 0xffff ;limit 15:0
129 000000EE 0000 <1> dw 0x0000 ;base 15:0
130 000000F0 00 <1> db 0x00 ;base 23:16
131 000000F1 FA <1> db 0xFA ;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
132 000000F2 CF <1> db 0xCF ;flags ([G][D/B][0][0]) / limit 19:16
133 000000F3 00 <1> db 0x00 ;base 31:24
134 <1> USER_DATA equ $-gdt
135 000000F4 FFFF <1> dw 0xffff ;limit 15:0
136 000000F6 0000 <1> dw 0x0000 ;base 15:0
137 000000F8 00 <1> db 0x00 ;base 23:16
138 000000F9 F2 <1> db 0xF2 ;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
139 000000FA CF <1> db 0xCF ;flags ([G][D/B][0][0]) / limit 19:16
140 000000FB 00 <1> db 0x00 ;base 31:24
141 <1> gVESA_CODE equ $-gdt
142 000000FC FFFF <1> dw 0xffff ;limit 15:0
143 000000FE 0000 <1> dw 0x0000 ;base 15:0
144 00000100 00 <1> db 0x00 ;base 23:16
145 00000101 9A <1> db 0x9A ;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
146 00000102 40 <1> db 0x40 ;flags ([G][D/B][0][0]) / limit 19:16
147 00000103 00 <1> db 0x00 ;base 31:24
148 <1> VESA_DATA equ $-gdt
149 00000104 FFFF <1> dw 0xffff ;limit 15:0
150 00000106 0000 <1> dw 0x0000 ;base 15:0
151 00000108 00 <1> db 0x00 ;base 23:16
152 00000109 92 <1> db 0x92 ;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
153 0000010A 40 <1> db 0x40 ;flags ([G][D/B][0][0]) / limit 19:16
154 0000010B 00 <1> db 0x00 ;base 31:24
155 <1> VIDEO_TEXT equ $-gdt
156 0000010C FF7F <1> dw 0x7FFF ;limit 15:0
157 0000010E 0080 <1> dw 0x8000 ;base 15:0
158 00000110 0B <1> db 0x0B ;base 23:16
159 00000111 92 <1> db 0x92 ;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
160 00000112 40 <1> db 0x40 ;flags ([G][D/B][0][0]) / limit 19:16
161 00000113 00 <1> db 0x00 ;base 31:24
162 <1> VIDEO_GRAPHICS equ $-gdt
163 00000114 FFFF <1> dw 0xFFFF ;limit 15:0
164 00000116 0000 <1> dw 0x0000 ;base 15:0
165 00000118 0A <1> db 0x0A ;base 23:16
166 00000119 92 <1> db 0x92 ;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
167 0000011A 40 <1> db 0x40 ;flags ([G][D/B][0][0]) / limit 19:16
168 0000011B 00 <1> db 0x00 ;base 31:24
169 <1> gdt_end:
170 <1>
171 <1>
172 <1>
173 %include "idt.inc"
174 <1> ;idt.inc
175 <1> ;Author: Josh Holtrop
176 <1> ;Date: 10/30/03
177 <1> ;Modified: 03/02/04
178 <1>
179 <1> idtr:
180 0000011C 8F01 <1> dw 50*8-1 ;size of idt
181 0000011E 002010C0 <1> dd IDT_V ;address of idt
182 <1>
183 <1>
184 <1> %macro isr_label 1
185 <1> isr_%1:
186 <1> push eax
187 <1> mov eax, %1
188 <1> jmp isr_main
189 <1> %endmacro
190 <1>
191 <1> isr_label 0
192 <2> isr_%1:
193 00000122 50 <2> push eax
194 00000123 B800000000 <2> mov eax, %1
195 00000128 E91B020000 <2> jmp isr_main
196 <1> isr_label 1
197 <2> isr_%1:
198 0000012D 50 <2> push eax
199 0000012E B801000000 <2> mov eax, %1
200 00000133 E910020000 <2> jmp isr_main
201 <1> isr_label 2
202 <2> isr_%1:
203 00000138 50 <2> push eax
204 00000139 B802000000 <2> mov eax, %1
205 0000013E E905020000 <2> jmp isr_main
206 <1> isr_label 3
207 <2> isr_%1:
208 00000143 50 <2> push eax
209 00000144 B803000000 <2> mov eax, %1
210 00000149 E9FA010000 <2> jmp isr_main
211 <1> isr_label 4
212 <2> isr_%1:
213 0000014E 50 <2> push eax
214 0000014F B804000000 <2> mov eax, %1
215 00000154 E9EF010000 <2> jmp isr_main
216 <1> isr_label 5
217 <2> isr_%1:
218 00000159 50 <2> push eax
219 0000015A B805000000 <2> mov eax, %1
220 0000015F E9E4010000 <2> jmp isr_main
221 <1> isr_label 6
222 <2> isr_%1:
223 00000164 50 <2> push eax
224 00000165 B806000000 <2> mov eax, %1
225 0000016A E9D9010000 <2> jmp isr_main
226 <1> isr_label 7
227 <2> isr_%1:
228 0000016F 50 <2> push eax
229 00000170 B807000000 <2> mov eax, %1
230 00000175 E9CE010000 <2> jmp isr_main
231 <1> isr_label 8
232 <2> isr_%1:
233 0000017A 50 <2> push eax
234 0000017B B808000000 <2> mov eax, %1
235 00000180 E9C3010000 <2> jmp isr_main
236 <1> isr_label 9
237 <2> isr_%1:
238 00000185 50 <2> push eax
239 00000186 B809000000 <2> mov eax, %1
240 0000018B E9B8010000 <2> jmp isr_main
241 <1> isr_label 10
242 <2> isr_%1:
243 00000190 50 <2> push eax
244 00000191 B80A000000 <2> mov eax, %1
245 00000196 E9AD010000 <2> jmp isr_main
246 <1> isr_label 11
247 <2> isr_%1:
248 0000019B 50 <2> push eax
249 0000019C B80B000000 <2> mov eax, %1
250 000001A1 E9A2010000 <2> jmp isr_main
251 <1> isr_label 12
252 <2> isr_%1:
253 000001A6 50 <2> push eax
254 000001A7 B80C000000 <2> mov eax, %1
255 000001AC E997010000 <2> jmp isr_main
256 <1> isr_label 13
257 <2> isr_%1:
258 000001B1 50 <2> push eax
259 000001B2 B80D000000 <2> mov eax, %1
260 000001B7 E98C010000 <2> jmp isr_main
261 <1> isr_label 14
262 <2> isr_%1:
263 000001BC 50 <2> push eax
264 000001BD B80E000000 <2> mov eax, %1
265 000001C2 E981010000 <2> jmp isr_main
266 <1> isr_label 15
267 <2> isr_%1:
268 000001C7 50 <2> push eax
269 000001C8 B80F000000 <2> mov eax, %1
270 000001CD E976010000 <2> jmp isr_main
271 <1> isr_label 16
272 <2> isr_%1:
273 000001D2 50 <2> push eax
274 000001D3 B810000000 <2> mov eax, %1
275 000001D8 E96B010000 <2> jmp isr_main
276 <1> isr_label 17
277 <2> isr_%1:
278 000001DD 50 <2> push eax
279 000001DE B811000000 <2> mov eax, %1
280 000001E3 E960010000 <2> jmp isr_main
281 <1> isr_label 18
282 <2> isr_%1:
283 000001E8 50 <2> push eax
284 000001E9 B812000000 <2> mov eax, %1
285 000001EE E955010000 <2> jmp isr_main
286 <1> isr_label 19
287 <2> isr_%1:
288 000001F3 50 <2> push eax
289 000001F4 B813000000 <2> mov eax, %1
290 000001F9 E94A010000 <2> jmp isr_main
291 <1> isr_label 20
292 <2> isr_%1:
293 000001FE 50 <2> push eax
294 000001FF B814000000 <2> mov eax, %1
295 00000204 E93F010000 <2> jmp isr_main
296 <1> isr_label 21
297 <2> isr_%1:
298 00000209 50 <2> push eax
299 0000020A B815000000 <2> mov eax, %1
300 0000020F E934010000 <2> jmp isr_main
301 <1> isr_label 22
302 <2> isr_%1:
303 00000214 50 <2> push eax
304 00000215 B816000000 <2> mov eax, %1
305 0000021A E929010000 <2> jmp isr_main
306 <1> isr_label 23
307 <2> isr_%1:
308 0000021F 50 <2> push eax
309 00000220 B817000000 <2> mov eax, %1
310 00000225 E91E010000 <2> jmp isr_main
311 <1> isr_label 24
312 <2> isr_%1:
313 0000022A 50 <2> push eax
314 0000022B B818000000 <2> mov eax, %1
315 00000230 E913010000 <2> jmp isr_main
316 <1> isr_label 25
317 <2> isr_%1:
318 00000235 50 <2> push eax
319 00000236 B819000000 <2> mov eax, %1
320 0000023B E908010000 <2> jmp isr_main
321 <1> isr_label 26
322 <2> isr_%1:
323 00000240 50 <2> push eax
324 00000241 B81A000000 <2> mov eax, %1
325 00000246 E9FD000000 <2> jmp isr_main
326 <1> isr_label 27
327 <2> isr_%1:
328 0000024B 50 <2> push eax
329 0000024C B81B000000 <2> mov eax, %1
330 00000251 E9F2000000 <2> jmp isr_main
331 <1> isr_label 28
332 <2> isr_%1:
333 00000256 50 <2> push eax
334 00000257 B81C000000 <2> mov eax, %1
335 0000025C E9E7000000 <2> jmp isr_main
336 <1> isr_label 29
337 <2> isr_%1:
338 00000261 50 <2> push eax
339 00000262 B81D000000 <2> mov eax, %1
340 00000267 E9DC000000 <2> jmp isr_main
341 <1> isr_label 30
342 <2> isr_%1:
343 0000026C 50 <2> push eax
344 0000026D B81E000000 <2> mov eax, %1
345 00000272 E9D1000000 <2> jmp isr_main
346 <1> isr_label 31
347 <2> isr_%1:
348 00000277 50 <2> push eax
349 00000278 B81F000000 <2> mov eax, %1
350 0000027D E9C6000000 <2> jmp isr_main
351 <1> isr_label 32
352 <2> isr_%1:
353 00000282 50 <2> push eax
354 00000283 B820000000 <2> mov eax, %1
355 00000288 E9BB000000 <2> jmp isr_main
356 <1> isr_label 33
357 <2> isr_%1:
358 0000028D 50 <2> push eax
359 0000028E B821000000 <2> mov eax, %1
360 00000293 E9B0000000 <2> jmp isr_main
361 <1> isr_label 34
362 <2> isr_%1:
363 00000298 50 <2> push eax
364 00000299 B822000000 <2> mov eax, %1
365 0000029E E9A5000000 <2> jmp isr_main
366 <1> isr_label 35
367 <2> isr_%1:
368 000002A3 50 <2> push eax
369 000002A4 B823000000 <2> mov eax, %1
370 000002A9 E99A000000 <2> jmp isr_main
371 <1> isr_label 36
372 <2> isr_%1:
373 000002AE 50 <2> push eax
374 000002AF B824000000 <2> mov eax, %1
375 000002B4 E98F000000 <2> jmp isr_main
376 <1> isr_label 37
377 <2> isr_%1:
378 000002B9 50 <2> push eax
379 000002BA B825000000 <2> mov eax, %1
380 000002BF E984000000 <2> jmp isr_main
381 <1> isr_label 38
382 <2> isr_%1:
383 000002C4 50 <2> push eax
384 000002C5 B826000000 <2> mov eax, %1
385 000002CA E979000000 <2> jmp isr_main
386 <1> isr_label 39
387 <2> isr_%1:
388 000002CF 50 <2> push eax
389 000002D0 B827000000 <2> mov eax, %1
390 000002D5 E96E000000 <2> jmp isr_main
391 <1> isr_label 40
392 <2> isr_%1:
393 000002DA 50 <2> push eax
394 000002DB B828000000 <2> mov eax, %1
395 000002E0 E963000000 <2> jmp isr_main
396 <1> isr_label 41
397 <2> isr_%1:
398 000002E5 50 <2> push eax
399 000002E6 B829000000 <2> mov eax, %1
400 000002EB E958000000 <2> jmp isr_main
401 <1> isr_label 42
402 <2> isr_%1:
403 000002F0 50 <2> push eax
404 000002F1 B82A000000 <2> mov eax, %1
405 000002F6 E94D000000 <2> jmp isr_main
406 <1> isr_label 43
407 <2> isr_%1:
408 000002FB 50 <2> push eax
409 000002FC B82B000000 <2> mov eax, %1
410 00000301 E942000000 <2> jmp isr_main
411 <1> isr_label 44
412 <2> isr_%1:
413 00000306 50 <2> push eax
414 00000307 B82C000000 <2> mov eax, %1
415 0000030C E937000000 <2> jmp isr_main
416 <1> isr_label 45
417 <2> isr_%1:
418 00000311 50 <2> push eax
419 00000312 B82D000000 <2> mov eax, %1
420 00000317 E92C000000 <2> jmp isr_main
421 <1> isr_label 46
422 <2> isr_%1:
423 0000031C 50 <2> push eax
424 0000031D B82E000000 <2> mov eax, %1
425 00000322 E921000000 <2> jmp isr_main
426 <1> isr_label 47
427 <2> isr_%1:
428 00000327 50 <2> push eax
429 00000328 B82F000000 <2> mov eax, %1
430 0000032D E916000000 <2> jmp isr_main
431 <1> isr_label 48
432 <2> isr_%1:
433 00000332 50 <2> push eax
434 00000333 B830000000 <2> mov eax, %1
435 00000338 E90B000000 <2> jmp isr_main
436 <1> isr_label 49
437 <2> isr_%1:
438 0000033D 50 <2> push eax
439 0000033E B831000000 <2> mov eax, %1
440 00000343 E900000000 <2> jmp isr_main
441 <1>
442 <1> isr_main:
443 00000348 3D30000000 <1> cmp eax, 0x30
444 0000034D 7414 <1> jz isr_syscall
445 <1>
446 0000034F 60 <1> pusha
447 00000350 1E <1> push ds
448 00000351 06 <1> push es
449 <1>
450 00000352 50 <1> push eax
451 <1>
452 00000353 E8(00000000) <1> call _isr
453 <1>
454 00000358 81C404000000 <1> add esp, 4
455 <1>
456 0000035E 07 <1> pop es
457 0000035F 1F <1> pop ds
458 00000360 61 <1> popa
459 00000361 58 <1> pop eax
460 <1>
461 00000362 CF <1> iret
462 <1>
463 <1>
464 <1> isr_syscall:
465 00000363 58 <1> pop eax ;syscall function number
466 00000364 60 <1> pusha
467 00000365 1E <1> push ds
468 00000366 06 <1> push es
469 <1>
470 <1> sc1:
471 00000367 3D01000000 <1> cmp eax, 1 ;syscall 1 - putc
472 0000036C 7511 <1> jnz sc2
473 0000036E 53 <1> push ebx
474 0000036F E8(00000000) <1> call _putc
475 00000374 81C404000000 <1> add esp, 4
476 0000037A E900000000 <1> jmp scdone
477 <1> sc2:
478 <1>
479 <1> scdone:
480 0000037F 07 <1> pop es
481 00000380 1F <1> pop ds
482 00000381 61 <1> popa
483 00000382 CF <1> iret
484 <1>
485 <1>
486 <1>
487 <1>
488 <1>
489 <1>
490 <1>
491
492