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ef1b3fda KS |
1 | //===-- sanitizer_syscall_linux_x86_64.inc ----------------------*- C++ -*-===// |
2 | // | |
3 | // This file is distributed under the University of Illinois Open Source | |
4 | // License. See LICENSE.TXT for details. | |
5 | // | |
6 | //===----------------------------------------------------------------------===// | |
7 | // | |
8 | // Implementations of internal_syscall and internal_iserror for Linux/x86_64. | |
9 | // | |
10 | //===----------------------------------------------------------------------===// | |
11 | ||
dee5ea7a KS |
12 | #define SYSCALL(name) __NR_ ## name |
13 | ||
ef1b3fda KS |
14 | static uptr internal_syscall(u64 nr) { |
15 | u64 retval; | |
df77f0e4 KS |
16 | asm volatile("syscall" : "=a"(retval) : "a"(nr) : "rcx", "r11", |
17 | "memory", "cc"); | |
ef1b3fda KS |
18 | return retval; |
19 | } | |
20 | ||
21 | template <typename T1> | |
22 | static uptr internal_syscall(u64 nr, T1 arg1) { | |
23 | u64 retval; | |
24 | asm volatile("syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1) : | |
df77f0e4 | 25 | "rcx", "r11", "memory", "cc"); |
ef1b3fda KS |
26 | return retval; |
27 | } | |
28 | ||
29 | template <typename T1, typename T2> | |
30 | static uptr internal_syscall(u64 nr, T1 arg1, T2 arg2) { | |
31 | u64 retval; | |
32 | asm volatile("syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1), | |
df77f0e4 | 33 | "S"((u64)arg2) : "rcx", "r11", "memory", "cc"); |
ef1b3fda KS |
34 | return retval; |
35 | } | |
36 | ||
37 | template <typename T1, typename T2, typename T3> | |
38 | static uptr internal_syscall(u64 nr, T1 arg1, T2 arg2, T3 arg3) { | |
39 | u64 retval; | |
40 | asm volatile("syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1), | |
df77f0e4 | 41 | "S"((u64)arg2), "d"((u64)arg3) : "rcx", "r11", "memory", "cc"); |
ef1b3fda KS |
42 | return retval; |
43 | } | |
44 | ||
45 | template <typename T1, typename T2, typename T3, typename T4> | |
46 | static uptr internal_syscall(u64 nr, T1 arg1, T2 arg2, T3 arg3, T4 arg4) { | |
47 | u64 retval; | |
48 | asm volatile("mov %5, %%r10;" | |
49 | "syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1), | |
50 | "S"((u64)arg2), "d"((u64)arg3), "r"((u64)arg4) : | |
df77f0e4 | 51 | "rcx", "r11", "r10", "memory", "cc"); |
ef1b3fda KS |
52 | return retval; |
53 | } | |
54 | ||
55 | template <typename T1, typename T2, typename T3, typename T4, typename T5> | |
56 | static uptr internal_syscall(u64 nr, T1 arg1, T2 arg2, T3 arg3, T4 arg4, | |
57 | T5 arg5) { | |
58 | u64 retval; | |
59 | asm volatile("mov %5, %%r10;" | |
60 | "mov %6, %%r8;" | |
61 | "syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1), | |
62 | "S"((u64)arg2), "d"((u64)arg3), "r"((u64)arg4), "r"((u64)arg5) : | |
df77f0e4 | 63 | "rcx", "r11", "r10", "r8", "memory", "cc"); |
ef1b3fda KS |
64 | return retval; |
65 | } | |
66 | ||
67 | template <typename T1, typename T2, typename T3, typename T4, typename T5, | |
68 | typename T6> | |
69 | static uptr internal_syscall(u64 nr, T1 arg1, T2 arg2, T3 arg3, T4 arg4, | |
70 | T5 arg5, T6 arg6) { | |
71 | u64 retval; | |
72 | asm volatile("mov %5, %%r10;" | |
73 | "mov %6, %%r8;" | |
74 | "mov %7, %%r9;" | |
75 | "syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1), | |
76 | "S"((u64)arg2), "d"((u64)arg3), "r"((u64)arg4), "r"((u64)arg5), | |
df77f0e4 KS |
77 | "r"((u64)arg6) : "rcx", "r11", "r10", "r8", "r9", |
78 | "memory", "cc"); | |
ef1b3fda KS |
79 | return retval; |
80 | } | |
81 | ||
82 | bool internal_iserror(uptr retval, int *rverrno) { | |
83 | if (retval >= (uptr)-4095) { | |
84 | if (rverrno) | |
85 | *rverrno = -retval; | |
86 | return true; | |
87 | } | |
88 | return false; | |
89 | } |