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pull/2/head
Jørn Guldberg 6 years ago
parent
c7ad92b3b2
commit
e12768398d
4 changed files with 249 additions and 131 deletions
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  1. BIN
      disk.out
  2. 8
      main.c
  3. 316
      main.s
  4. 54
      std_singos/string.h

BIN
disk.out
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Binary file not shown.

8
main.c
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@ -111,9 +111,10 @@ void* pointer_parameter_struct;
Parameter_Struct parameter_struct;
int local_segment = 0x7e0;
int stack_segment = 0x8fc0;
int path_length;
long index_as_long;
char local_path[256]; //= "Hello world\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
char local_path[256];
service_action = selector;
switch (service_action)
@ -134,7 +135,10 @@ void* pointer_parameter_struct;
case SERVICE_FIND_ENTRY:
{
memcpy(&parameter_struct, stack_segment, pointer_parameter_struct, pointer_parameter_segment, sizeof(Parameter_Struct));
dump_ax(parameter_struct.buffer_size);
path_length = strlen(parameter_struct.path, pointer_parameter_segment);
memcpy(local_path, stack_segment, parameter_struct.path, pointer_parameter_segment, path_length);
local_path[path_length] = 0;
print_stack(local_path);
print_newline();
disk_service_read_data_from_disk(fsci.master_table_index[0], DEFAULT_TABLE_SIZE, &current_table, stack_segment);
print("Current table: ");

316
main.s
View File

@ -12,22 +12,64 @@ retf
! 1 # 1 "std_singos/string.h"
! 1 void strcpy (destination, destination_segment, source, source_segment );
!BCC_EOS
! 2 void memcpy (destination, destination_segment, source, source_segment, num_bytes );
! 2 int strlen (source, source_segment);
!BCC_EOS
! 3
! 4 void strcpy (destination, destination_segment, source, source_segment )
! 5 char *destination;
! 3 void memcpy (destination, destination_segment, source, source_segment, num_bytes );
!BCC_EOS
! 4
! 5 int strlen (source, source_segment)
! 6 {
export _strlen
_strlen:
! 7 #asm
!BCC_ASM
_strlen.source set 2
_strlen.source_segment set 4
push bp
mov bp,sp
push ds
push bx
mov ax, 6[bp];
mov ds, ax
mov bx, 4[bp];
label_strlen:
mov cx, #0x0 ; Set counte to zero
.label_strlen_loop:
mov BYTE al, [bx]
cmp al, #0x0
je .label_strlen_done
inc cx ; Count 1
inc bx ; Look at next char
jmp .label_strlen_loop
.label_strlen_done:
mov ax, cx
pop bx
pop ds
pop bp
! 35 endasm
!BCC_ENDASM
! 36 }
ret
! 37
! 38 void strcpy (destination, destination_segment, source, source_segment )
! 39 char *destination;
export _strcpy
_strcpy:
!BCC_EOS
! 6 int destination_segment;
! 40 int destination_segment;
!BCC_EOS
! 7 char *source;
! 41 char *source;
!BCC_EOS
! 8 int source_segment;
! 42 int source_segment;
!BCC_EOS
! 9 {
! 10 #asm
! 43 {
! 44 #asm
!BCC_ASM
_strcpy.source set 6
_strcpy.destination set 2
@ -38,11 +80,11 @@ _strcpy.destination_segment set 4
; IN di: the second (zero terminated) string
; OUT SF and ZF (same semantics as cmp)
! 16 20
! 50 54
push bp
mov bp,sp
stringcompare:
label_strcpy:
push ax
push bx
push di
@ -58,13 +100,13 @@ _strcpy.destination_segment set 4
mov ax, 10[bp]; ;
mov ds, ax
mov cx, 0x050
.loop:
.label_strcpy_loop:
movsb
cmp cx, 0x0
je .end
je .label_strcpy_end
dec cx
jmp .loop
.end:
jmp .label_strcpy_loop
.label_strcpy_end:
pop ds
pop si
pop es
@ -73,26 +115,26 @@ _strcpy.destination_segment set 4
pop ax
pop bp
! 54 endasm
! 88 endasm
!BCC_ENDASM
! 55 }
! 89 }
ret
! 56
! 57 void memcpy (destination, destination_segment, source, source_segment, num_bytes)
! 58 void *destination;
! 90
! 91 void memcpy (destination, destination_segment, source, source_segment, num_bytes)
! 92 void *destination;
export _memcpy
_memcpy:
!BCC_EOS
! 59 int destination_segment;
! 93 int destination_segment;
!BCC_EOS
! 60 void *source;
! 94 void *source;
!BCC_EOS
! 61 int source_segment;
! 95 int source_segment;
!BCC_EOS
! 62 int num_bytes;
! 96 int num_bytes;
!BCC_EOS
! 63 {
! 64 #asm
! 97 {
! 98 #asm
!BCC_ASM
_memcpy.source set 6
_memcpy.destination set 2
@ -104,11 +146,11 @@ _memcpy.destination_segment set 4
; IN di: the second (zero terminated) string
; OUT SF and ZF (same semantics as cmp)
! 70 75
! 104 109
push bp
mov bp,sp
memcpy:
label_memcpy:
push ax
push bx
push di
@ -124,13 +166,13 @@ _memcpy.destination_segment set 4
mov ax, 10[bp]; ;
mov ds, ax
mov cx, 12[bp];
.memcpy_loop:
.label_memcpy_loop:
movsb
cmp cx, 0x0
je .end
je .label_memcpy_end
dec cx
jmp .loop
.memcpy_end:
jmp .label_memcpy_loop
.label_memcpy_end:
pop ds
pop si
pop es
@ -139,13 +181,12 @@ _memcpy.destination_segment set 4
pop ax
pop bp
! 109 endasm
! 143 endasm
!BCC_ENDASM
! 110 # 6 "main.c"
! 144 # 6 "main.c"
! 6 }
ret
! 7 # 1 "std_
! 0 singos/stdio.h"
! 7 # 1 "std_singos/stdio.h"
! 1 void print(string);
!BCC_EOS
! 2
@ -341,8 +382,7 @@ ret
! 12
! 13 #define DEFAULT_ENTRY_SIZE 1
! 14
! 15 #def
! 15 ine NUMBER_OF_MBR_PARTITIONS 4
! 15 #define NUMBER_OF_MBR_PARTITIONS 4
! 16
! 17 #define DEFAULT_DATA_POINTER_SIZE 4
! 18
@ -428,7 +468,8 @@ ret
!BCC_EOS
! 71 long this_partition_offset_on_disk[2];
!BCC_EOS
! 72 long next_free_sector[2];
! 72 long next
! 72 _free_sector[2];
!BCC_EOS
! 73 long next_uniqe_id[2];
!BCC_EOS
@ -482,8 +523,7 @@ _main:
!BCC_EOS
! 102 void* pointer_parameter_segment;
!BCC_EOS
! 103 void* pointer_parameter_struct
! 103 ;
! 103 void* pointer_parameter_struct;
!BCC_EOS
! 104 {
! 105
@ -514,53 +554,55 @@ dec sp
mov ax,#$8FC0
mov -$221A[bp],ax
!BCC_EOS
! 114 long index_as_long;
! 114 int path_length;
!BCC_EOS
! 115 long index_as_long;
!BCC_EOS
! 115
! 116 char local_path[256];
! 116
! 117 char local_path[256];
!BCC_EOS
! 117 service_action = selector;
add sp,#-$104
! Debug: eq int selector = [S+$2320+2] to int service_action = [S+$2320-$208] (used reg = )
! 118 service_action = selector;
add sp,#-$106
! Debug: eq int selector = [S+$2322+2] to int service_action = [S+$2322-$208] (used reg = )
mov ax,4[bp]
mov -$206[bp],ax
!BCC_EOS
! 118
! 119 switch (service_action)
! 119
! 120 switch (service_action)
mov ax,-$206[bp]
! 120 {
! 121 {
br .3
! 121 case SERIVCE_LOAD_DISK:
! 122 {
! 122 case SERIVCE_LOAD_DISK:
! 123 {
.4:
! 123
! 124
! 125
! 126
! 127 index_as_long = pointer_parameter_struct;
! Debug: eq * void pointer_parameter_struct = [S+$2320+6] to long index_as_long = [S+$2320-$2220] (used reg = )
! 127
! 128 index_as_long = pointer_parameter_struct;
! Debug: eq * void pointer_parameter_struct = [S+$2322+6] to long index_as_long = [S+$2322-$2222] (used reg = )
mov ax,8[bp]
xor bx,bx
mov -$221E[bp],ax
mov -$221C[bp],bx
mov -$2220[bp],ax
mov -$221E[bp],bx
!BCC_EOS
! 128 disk_service_read_data_from_disk(index_as_long, 1, &fsci, stack_segment);
! Debug: list int stack_segment = [S+$2320-$221C] (used reg = )
! 129 disk_service_read_data_from_disk(index_as_long, 1, &fsci, stack_segment);
! Debug: list int stack_segment = [S+$2322-$221C] (used reg = )
push -$221A[bp]
! Debug: list * struct File_System_Control_Information fsci = S+$2322-$206 (used reg = )
! Debug: list * struct File_System_Control_Information fsci = S+$2324-$206 (used reg = )
lea bx,-$204[bp]
push bx
! Debug: list int = const 1 (used reg = )
mov ax,*1
push ax
! Debug: list long index_as_long = [S+$2326-$2220] (used reg = )
push -$221C[bp]
! Debug: list long index_as_long = [S+$2328-$2222] (used reg = )
push -$221E[bp]
push -$2220[bp]
! Debug: func () int = disk_service_read_data_from_disk+0 (used reg = )
call _disk_service_read_data_from_disk
add sp,*$A
!BCC_EOS
! 129 print("File System has been loaded: ");
! 130 print("File System has been loaded: ");
! Debug: list * char = .5+0 (used reg = )
mov bx,#.5
push bx
@ -569,12 +611,12 @@ call _print
inc sp
inc sp
!BCC_EOS
! 130 print_newline();
! 131 print_newline();
! Debug: func () void = print_newline+0 (used reg = )
call _print_newline
!BCC_EOS
! 131 print_stack(fsci.filesystem_information);
! Debug: list * char fsci = S+$2320-$206 (used reg = )
! 132 print_stack(fsci.filesystem_information);
! Debug: list * char fsci = S+$2322-$206 (used reg = )
lea bx,-$204[bp]
push bx
! Debug: func () void = print_stack+0 (used reg = )
@ -582,62 +624,99 @@ call _print_stack
inc sp
inc sp
!BCC_EOS
! 132 print_newline();
! 133 print_newline();
! Debug: func () void = print_newline+0 (used reg = )
call _print_newline
!BCC_EOS
! 133 } break;
! 134 } break;
br .1
!BCC_EOS
! 134 case SERVICE_FIND_ENTRY:
! 135 {
! 135 case SERVICE_FIND_ENTRY:
! 136 {
.6:
! 136 memcpy(&parameter_struct, stack_segment, pointer_parameter_struct, pointer_parameter_segment, sizeof(Parameter_Struct));
! 137 memcpy(&parameter_struct, stack_segment, pointer_parameter_struct, pointer_parameter_segment, sizeof(Parameter_Struct));
! Debug: list int = const $10 (used reg = )
mov ax,*$10
push ax
! Debug: list * void pointer_parameter_segment = [S+$2322+4] (used reg = )
! Debug: list * void pointer_parameter_segment = [S+$2324+4] (used reg = )
push 6[bp]
! Debug: list * void pointer_parameter_struct = [S+$2324+6] (used reg = )
! Debug: list * void pointer_parameter_struct = [S+$2326+6] (used reg = )
push 8[bp]
! Debug: list int stack_segment = [S+$2326-$221C] (used reg = )
! Debug: list int stack_segment = [S+$2328-$221C] (used reg = )
push -$221A[bp]
! Debug: list * struct Parameter_Struct parameter_struct = S+$2328-$2218 (used reg = )
! Debug: list * struct Parameter_Struct parameter_struct = S+$232A-$2218 (used reg = )
lea bx,-$2216[bp]
push bx
! Debug: func () void = memcpy+0 (used reg = )
call _memcpy
add sp,*$A
!BCC_EOS
! 137 dump_ax(parameter_struct.buffer_size);
! Debug: list int parameter_struct = [S+$2320-$2210] (used reg = )
push -$220E[bp]
! Debug: func () void = dump_ax+0 (used reg = )
call _dump_ax
! 138 path_length = strlen(parameter_struct.path, pointer_parameter_segment);
! Debug: list * void pointer_parameter_segment = [S+$2322+4] (used reg = )
push 6[bp]
! Debug: list * char parameter_struct = [S+$2324-$2218] (used reg = )
push -$2216[bp]
! Debug: func () int = strlen+0 (used reg = )
call _strlen
add sp,*4
! Debug: eq int = ax+0 to int path_length = [S+$2322-$221E] (used reg = )
mov -$221C[bp],ax
!BCC_EOS
! 139 memcpy(local_path, stack_segment, parameter_struct.path, pointer_parameter_segment, path_length);
! Debug: list int path_length = [S+$2322-$221E] (used reg = )
push -$221C[bp]
! Debug: list * void pointer_parameter_segment = [S+$2324+4] (used reg = )
push 6[bp]
! Debug: list * char parameter_struct = [S+$2326-$2218] (used reg = )
push -$2216[bp]
! Debug: list int stack_segment = [S+$2328-$221C] (used reg = )
push -$221A[bp]
! Debug: list * char local_path = S+$232A-$2322 (used reg = )
lea bx,-$2320[bp]
push bx
! Debug: func () void = memcpy+0 (used reg = )
call _memcpy
add sp,*$A
!BCC_EOS
! 140 local_path[path_length] = 0;
! Debug: ptradd int path_length = [S+$2322-$221E] to [$100] char local_path = S+$2322-$2322 (used reg = )
mov ax,-$221C[bp]
mov bx,bp
add bx,ax
! Debug: eq int = const 0 to char = [bx-$2320] (used reg = )
xor al,al
mov -$2320[bx],al
!BCC_EOS
! 141 print_stack(local_path);
! Debug: list * char local_path = S+$2322-$2322 (used reg = )
lea bx,-$2320[bp]
push bx
! Debug: func () void = print_stack+0 (used reg = )
call _print_stack
inc sp
inc sp
!BCC_EOS
! 138 print_newline();
! 142 print_newline();
! Debug: func () void = print_newline+0 (used reg = )
call _print_newline
!BCC_EOS
! 139 disk_service_read_data_from_disk(fsci.master_table_index[0], 16 , &current_table, stack_segment);
! Debug: list int stack_segment = [S+$2320-$221C] (used reg = )
! 143 disk_service_read_data_from_disk(fsci.master_table_index[0], 16 , &current_table, stack_segment);
! Debug: list int stack_segment = [S+$2322-$221C] (used reg = )
push -$221A[bp]
! Debug: list * struct Directory_Table current_table = S+$2322-$2208 (used reg = )
! Debug: list * struct Directory_Table current_table = S+$2324-$2208 (used reg = )
lea bx,-$2206[bp]
push bx
! Debug: list int = const $10 (used reg = )
mov ax,*$10
push ax
! Debug: list long fsci = [S+$2326-$106] (used reg = )
! Debug: list long fsci = [S+$2328-$106] (used reg = )
push -$102[bp]
push -$104[bp]
! Debug: func () int = disk_service_read_data_from_disk+0 (used reg = )
call _disk_service_read_data_from_disk
add sp,*$A
!BCC_EOS
! 140 print("Current table: ");
! 144 print("Current table: ");
! Debug: list * char = .7+0 (used reg = )
mov bx,#.7
push bx
@ -646,12 +725,13 @@ call _print
inc sp
inc sp
!BCC_EOS
! 141 print_newline();
! 145 print_newline(
! 145 );
! Debug: func () void = print_newline+0 (used reg = )
call _print_newline
!BCC_EOS
! 142 print_stack(current_table.entries[0].filename);
! Debug: list * char current_table = S+$2320-$2208 (used reg = )
! 146 print_stack(current_table.entries[0].filename);
! Debug: list * char current_table = S+$2322-$2208 (used reg = )
lea bx,-$2206[bp]
push bx
! Debug: func () void = print_stack+0 (used reg = )
@ -659,12 +739,12 @@ call _print_stack
inc sp
inc sp
!BCC_EOS
! 143 print_newline();
! 147 print_newline();
! Debug: func () void = print_newline+0 (used reg = )
call _print_newline
!BCC_EOS
! 144 print_stack(current_table.entries[1].filename);
! Debug: list * char current_table = S+$2320-$2008 (used reg = )
! 148 print_stack(current_table.entries[1].filename);
! Debug: list * char current_table = S+$2322-$2008 (used reg = )
lea bx,-$2006[bp]
push bx
! Debug: func () void = print_stack+0 (used reg = )
@ -672,12 +752,12 @@ call _print_stack
inc sp
inc sp
!BCC_EOS
! 145 print_newline();
! 149 print_newline();
! Debug: func () void = print_newline+0 (used reg = )
call _print_newline
!BCC_EOS
! 146 print_stack(current_table.entries[2].filename);
! Debug: list * char current_table = S+$2320-$1E08 (used reg = )
! 150 print_stack(current_table.entries[2].filename);
! Debug: list * char current_table = S+$2322-$1E08 (used reg = )
lea bx,-$1E06[bp]
push bx
! Debug: func () void = print_stack+0 (used reg = )
@ -685,19 +765,19 @@ call _print_stack
inc sp
inc sp
!BCC_EOS
! 147 print_newline();
! 151 print_newline();
! Debug: func () void = print_newline+0 (used reg = )
call _print_newline
!BCC_EOS
! 148 } break;
! 152 } break;
jmp .1
!BCC_EOS
! 149 case SERIVCE_READ_DATA:
! 150 {
! 153 case SERIVCE_READ_DATA:
! 154 {
.8:
! 151 # 159
! 159
! 160 print("Hit READ case");
! 155 # 163
! 163
! 164 print("Hit READ case");
! Debug: list * char = .9+0 (used reg = )
mov bx,#.9
push bx
@ -706,13 +786,13 @@ call _print
inc sp
inc sp
!BCC_EOS
! 161 } break;
! 165 } break;
jmp .1
!BCC_EOS
! 162 case SERIVCE_WRITE_DATA:
! 163 {
! 166 case SERIVCE_WRITE_DATA:
! 167 {
.A:
! 164 print("Hit WRITE case");
! 168 print("Hit WRITE case");
! Debug: list * char = .B+0 (used reg = )
mov bx,#.B
push bx
@ -721,13 +801,13 @@ call _print
inc sp
inc sp
!BCC_EOS
! 165 } break;
! 169 } break;
jmp .1
!BCC_EOS
! 166 default:
! 167 {
! 170 default:
! 171 {
.C:
! 168 print("Default case");
! 172 print("Default case");
! Debug: list * char = .D+0 (used reg = )
mov bx,#.D
push bx
@ -736,10 +816,10 @@ call _print
inc sp
inc sp
!BCC_EOS
! 169 }
! 170 }
! 171
! 172 return 0;
! 173 }
! 174 }
! 175
! 176 return 0;
jmp .1
.3:
sub ax,*1
@ -752,7 +832,7 @@ sub ax,*1
je .A
jmp .C
.1:
..FFFF = -$2320
..FFFF = -$2322
xor ax,ax
lea sp,-4[bp]
pop si
@ -760,9 +840,9 @@ pop di
pop bp
ret
!BCC_EOS
! 173
! 174 }
! 175
! 177
! 178 }
! 179
! Register BX used in function main
.D:
.E:

54
std_singos/string.h
View File

@ -1,6 +1,40 @@
void strcpy (destination, destination_segment, source, source_segment );
int strlen (source, source_segment);
void memcpy (destination, destination_segment, source, source_segment, num_bytes );
int strlen (source, source_segment)
{
#asm
#define strlen_SOURCE 4[bp];
#define strlen_SOURCE_SEGMENT 6[bp];
push bp
mov bp,sp
push ds
push bx
mov ax, strlen_SOURCE_SEGMENT
mov ds, ax
mov bx, strlen_SOURCE
label_strlen:
mov cx, #0x0 ; Set counte to zero
.label_strlen_loop:
mov BYTE al, [bx]
cmp al, #0x0
je .label_strlen_done
inc cx ; Count 1
inc bx ; Look at next char
jmp .label_strlen_loop
.label_strlen_done:
mov ax, cx
pop bx
pop ds
pop bp
#endasm
}
void strcpy (destination, destination_segment, source, source_segment )
char *destination;
int destination_segment;
@ -20,7 +54,7 @@ int source_segment;
push bp
mov bp,sp
stringcompare:
label_strcpy:
push ax
push bx
push di
@ -36,13 +70,13 @@ int source_segment;
mov ax, SOURCE_SEGMENT;
mov ds, ax
mov cx, 0x050 // TODO(Jørn) Hardcded number of bytes to copy
.loop:
.label_strcpy_loop:
movsb
cmp cx, 0x0
je .end
je .label_strcpy_end
dec cx
jmp .loop
.end:
jmp .label_strcpy_loop
.label_strcpy_end:
pop ds
pop si
pop es
@ -75,7 +109,7 @@ int num_bytes;
push bp
mov bp,sp
memcpy:
label_memcpy:
push ax
push bx
push di
@ -91,13 +125,13 @@ int num_bytes;
mov ax, SOURCE_SEGMENT;
mov ds, ax
mov cx, NUM_BYTES
.memcpy_loop:
.label_memcpy_loop:
movsb
cmp cx, 0x0
je .end
je .label_memcpy_end
dec cx
jmp .loop
.memcpy_end:
jmp .label_memcpy_loop
.label_memcpy_end:
pop ds
pop si
pop es

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