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
|
// this file is specific to x86_64
const SYS_read = 0;
const SYS_write = 1;
const SYS_mmap = 9;
const SYS_munmap = 11;
const SYS_rt_sigprocmask = 14;
const SYS_exit = 60;
const SYS_kill = 62;
const SYS_getgid = 104;
const SYS_gettid = 186;
const SYS_tkill = 200;
const SYS_tgkill = 234;
const SYS_getrandom = 318;
pub const MMAP_PROT_NONE = 0;
pub const MMAP_PROT_READ = 1;
pub const MMAP_PROT_WRITE = 2;
pub const MMAP_PROT_EXEC = 4;
pub const MMAP_MAP_FILE = 0;
pub const MMAP_MAP_SHARED = 1;
pub const MMAP_MAP_PRIVATE = 2;
pub const MMAP_MAP_FIXED = 16;
pub const MMAP_MAP_ANON = 32;
pub const SIGHUP = 1;
pub const SIGINT = 2;
pub const SIGQUIT = 3;
pub const SIGILL = 4;
pub const SIGTRAP = 5;
pub const SIGABRT = 6;
pub const SIGIOT = SIGABRT;
pub const SIGBUS = 7;
pub const SIGFPE = 8;
pub const SIGKILL = 9;
pub const SIGUSR1 = 10;
pub const SIGSEGV = 11;
pub const SIGUSR2 = 12;
pub const SIGPIPE = 13;
pub const SIGALRM = 14;
pub const SIGTERM = 15;
pub const SIGSTKFLT = 16;
pub const SIGCHLD = 17;
pub const SIGCONT = 18;
pub const SIGSTOP = 19;
pub const SIGTSTP = 20;
pub const SIGTTIN = 21;
pub const SIGTTOU = 22;
pub const SIGURG = 23;
pub const SIGXCPU = 24;
pub const SIGXFSZ = 25;
pub const SIGVTALRM = 26;
pub const SIGPROF = 27;
pub const SIGWINCH = 28;
pub const SIGIO = 29;
pub const SIGPOLL = 29;
pub const SIGPWR = 30;
pub const SIGSYS = 31;
pub const SIGUNUSED = SIGSYS;
const SIG_BLOCK = 0;
const SIG_UNBLOCK = 1;
const SIG_SETMASK = 2;
fn syscall0(number: isize) -> isize {
asm volatile ("syscall"
: [ret] "={rax}" (-> isize)
: [number] "{rax}" (number)
: "rcx", "r11")
}
fn syscall1(number: isize, arg1: isize) -> isize {
asm volatile ("syscall"
: [ret] "={rax}" (-> isize)
: [number] "{rax}" (number),
[arg1] "{rdi}" (arg1)
: "rcx", "r11")
}
fn syscall2(number: isize, arg1: isize, arg2: isize) -> isize {
asm volatile ("syscall"
: [ret] "={rax}" (-> isize)
: [number] "{rax}" (number),
[arg1] "{rdi}" (arg1),
[arg2] "{rsi}" (arg2)
: "rcx", "r11")
}
fn syscall3(number: isize, arg1: isize, arg2: isize, arg3: isize) -> isize {
asm volatile ("syscall"
: [ret] "={rax}" (-> isize)
: [number] "{rax}" (number),
[arg1] "{rdi}" (arg1),
[arg2] "{rsi}" (arg2),
[arg3] "{rdx}" (arg3)
: "rcx", "r11")
}
fn syscall4(number: isize, arg1: isize, arg2: isize, arg3: isize, arg4: isize) -> isize {
asm volatile ("syscall"
: [ret] "={rax}" (-> isize)
: [number] "{rax}" (number),
[arg1] "{rdi}" (arg1),
[arg2] "{rsi}" (arg2),
[arg3] "{rdx}" (arg3),
[arg4] "{r10}" (arg4)
: "rcx", "r11")
}
fn syscall6(number: isize, arg1: isize, arg2: isize, arg3: isize, arg4: isize, arg5: isize, arg6: isize) -> isize {
asm volatile ("syscall"
: [ret] "={rax}" (-> isize)
: [number] "{rax}" (number),
[arg1] "{rdi}" (arg1),
[arg2] "{rsi}" (arg2),
[arg3] "{rdx}" (arg3),
[arg4] "{r10}" (arg4),
[arg5] "{r8}" (arg5),
[arg6] "{r9}" (arg6)
: "rcx", "r11")
}
pub fn mmap(address: isize, length: isize, prot: isize, flags: isize, fd: isize, offset: isize) -> isize {
syscall6(SYS_mmap, address, length, prot, flags, fd, offset)
}
pub fn munmap(address: isize, length: isize) -> isize {
syscall2(SYS_munmap, address, length)
}
pub fn read(fd: isize, buf: &u8, count: isize) -> isize {
syscall3(SYS_read, isize(fd), isize(buf), count)
}
pub fn write(fd: isize, buf: &const u8, count: isize) -> isize {
syscall3(SYS_write, isize(fd), isize(buf), count)
}
pub fn exit(status: i32) -> unreachable {
syscall1(SYS_exit, isize(status));
unreachable{}
}
pub fn getrandom(buf: &u8, count: isize, flags: u32) -> isize {
syscall3(SYS_getrandom, isize(buf), count, isize(flags))
}
pub fn kill(pid: i32, sig: i32) -> i32 {
i32(syscall2(SYS_kill, pid, sig))
}
const NSIG = 65;
const sigset_t = [128]u8;
const all_mask = []u8 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, };
const app_mask = []u8 { 0xff, 0xff, 0xff, 0xfc, 0x7f, 0xff, 0xff, 0xff, };
pub fn raise(sig: i32) -> i32 {
var set: sigset_t = undefined;
block_app_signals(&set);
const tid = i32(syscall0(SYS_gettid));
const ret = i32(syscall2(SYS_tkill, tid, sig));
restore_signals(&set);
return ret;
}
fn block_all_signals(set: &sigset_t) {
syscall4(SYS_rt_sigprocmask, SIG_BLOCK, isize(&all_mask), isize(set), NSIG/8);
}
fn block_app_signals(set: &sigset_t) {
syscall4(SYS_rt_sigprocmask, SIG_BLOCK, isize(&app_mask), isize(set), NSIG/8);
}
fn restore_signals(set: &sigset_t) {
syscall4(SYS_rt_sigprocmask, SIG_SETMASK, isize(set), 0, NSIG/8);
}
|
