1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
|
# Must be included at the top of the file
asm "extern malloc, realloc, free, printf, open, close, read, write, lseek, perror"
{}uint8 _alert = "Alert!\n\0"
{}uint8 _dec = "%d\n\0"
{}uint8 _ptr = "%p\n\0"
~void NULL = 0
/; _alloc (uint size) [~void]
~void out
asm "mov rax, rsp"
asm "xor rdx, rdx"
asm "mov rcx, 16"
asm "div rcx"
asm "sub rsp, rdx"
asm "sub rsp, 128"
# Mov size into proper register, and set all extras to zero
asm "mov rdi, r10"
asm "mov rsi, 0"
asm "xor rax, rax"
# Do call
asm "call malloc wrt ..plt"
# Set out to the returned value
# (The compiler assignes spaces sequentially, and we have a uint in r10)
asm "mov r11, rax"
return out
;/
/; _realloc (~void ptr, uint new_size) [~void]
~void out
asm "mov rax, rsp"
asm "xor rdx, rdx"
asm "mov rcx, 16"
asm "div rcx"
asm "sub rsp, rdx"
asm "sub rsp, 128"
# Mov ptr and new size into proper registers, and set all extras to zero
asm "mov rdi, r10"
asm "mov rsi, r11"
asm "xor rax, rax"
# Do call
asm "call realloc wrt ..plt"
# Set out to the returned value
# (The compiler assignes spaces sequentially. We have a ptr in r10, and a uint in r11)
asm "mov r12, rax"
return out
;/
/; _delete (~void ptr)
asm "mov rax, rsp"
asm "xor rdx, rdx"
asm "mov rcx, 16"
asm "div rcx"
asm "sub rsp, rdx"
asm "sub rsp, 128"
# setup call by clearing most values
asm "mov rdi, r10"
asm "mov rsi, 0"
asm "xor rax, rax"
# do call
asm "call free wrt ..plt"
# there's no more to do 'cause free returns nothing
;/
/; _printf (~void str)
asm "mov rax, rsp"
asm "xor rdx, rdx"
asm "mov rcx, 16"
asm "div rcx"
asm "sub rsp, rdx"
asm "sub rsp, 128"
# setup call by clearing most values
asm "mov rdi, r10"
asm "xor rsi, rsi"
asm "xor rax, rax"
# do call
asm "call printf wrt ..plt"
# there's no more to do 'cause printf returns nothing
;/
/; _print_num (~void str, int num)
asm "mov rax, rsp"
asm "xor rdx, rdx"
asm "mov rcx, 16"
asm "div rcx"
asm "sub rsp, rdx"
asm "sub rsp, 128"
# setup call by clearing most values
asm "mov rdi, r10"
asm "mov rsi, r11"
asm "xor rax, rax"
# do call
asm "call printf wrt ..plt"
# there's no more to do 'cause printf returns nothing
;/
# Create file for writing (overwrite)
/; _create_file (~void name) [int]
int out
asm "mov rax, rsp"
asm "xor rdx, rdx"
asm "mov rcx, 16"
asm "div rcx"
asm "sub rsp, rdx"
asm "sub rsp, 128"
# Do call
asm "mov rdi, r10"
asm "mov rsi, 0q1102"
asm "mov rdx, 0q700"
asm "call open wrt ..plt"
# Set out to the returned value
# (The compiler assignes spaces sequentially. We have a ptr in r8)
asm "mov r11, rax"
return out
;/
# Open file for reading or writing (no overwrite)
/; _open_file (~void name) [int]
int out
asm "mov rax, rsp"
asm "xor rdx, rdx"
asm "mov rcx, 16"
asm "div rcx"
asm "sub rsp, rdx"
asm "sub rsp, 128"
# Do syscall
asm "mov rdi, r10"
asm "mov rsi, 2"
asm "mov rdx, 0q700"
asm "call open wrt ..plt"
# Set out to the returned value
# (The compiler assignes spaces sequentially. We have a ptr in r8, and a uint in r9)
asm "mov r11, rax"
return out
;/
/; _close_file (int handle)
asm "mov rax, rsp"
asm "xor rdx, rdx"
asm "mov rcx, 16"
asm "div rcx"
asm "sub rsp, rdx"
asm "sub rsp, 128"
# Do syscall
asm "mov rdi, r10"
asm "call close wrt ..plt"
;/
/; _read_byte (int handle, ~uint8 byte) [int]
int out
asm "mov rax, rsp"
asm "xor rdx, rdx"
asm "mov rcx, 16"
asm "div rcx"
asm "sub rsp, rdx"
asm "sub rsp, 128"
# Do syscall
asm "mov rdi, r10" # handle
asm "mov rsi, r11" # buffer
asm "mov rdx, 1" # one byte
asm "call read wrt ..plt"
# return number of bytes read
asm "mov r12, rax"
return out
;/
/; _fseek (int handle, uint pos) [int]
int out
# align stack
asm "mov rax, rsp"
asm "xor rdx, rdx"
asm "mov rcx, 16"
asm "div rcx"
asm "sub rsp, rdx"
# add buffer zone to stack
asm "sub rsp, 128"
# Call c func
asm "mov rdi, r10"
asm "mov rsi, r11"
asm "mov rdx, 0" # standard value for SEEK_SET as per GNU libc
asm "call lseek wrt ..plt"
# get return value
asm "mov r12, rax"
return out
;/
/; _write_byte (int handle, ~uint8 byte) [int]
int out
asm "mov rax, rsp"
asm "xor rdx, rdx"
asm "mov rcx, 16"
asm "div rcx"
asm "sub rsp, rdx"
asm "sub rsp, 128"
# Do syscall
asm "mov rdi, r10" # handle
asm "mov rsi, r11" # buffer
asm "mov rdx, 1" # one byte
asm "call write wrt ..plt"
asm "mov r12, rax"
return out
;/
/; _perror (~void str)
asm "mov rax, rsp"
asm "xor rdx, rdx"
asm "mov rcx, 16"
asm "div rcx"
asm "sub rsp, rdx"
asm "sub rsp, 128"
# setup call by clearing most values
asm "mov rdi, r10"
asm "xor rsi, rsi"
asm "xor rax, rax"
# do call
asm "call perror wrt ..plt"
# there's no more to do 'cause printf returns nothing
;/
/; print_alert
_printf(~_alert{0})
;/
|
