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1 | //===-- sanitizer_syscall_linux_x86_64.inc ----------------------*- C++ -*-===// |
2 | // | |
3 | // The LLVM Compiler Infrastructure | |
4 | // | |
5 | // This file is distributed under the University of Illinois Open Source | |
6 | // License. See LICENSE.TXT for details. | |
7 | // | |
8 | //===----------------------------------------------------------------------===// | |
9 | // | |
10 | // Implementations of internal_syscall and internal_iserror for Linux/x86_64. | |
11 | // | |
12 | //===----------------------------------------------------------------------===// | |
13 | ||
14 | #define SYSCALL(name) __NR_ ## name | |
15 | ||
16 | static uptr internal_syscall(u64 nr) { | |
17 | u64 retval; | |
18 | asm volatile("syscall" : "=a"(retval) : "a"(nr) : "rcx", "r11", | |
19 | "memory", "cc"); | |
20 | return retval; | |
21 | } | |
22 | ||
23 | template <typename T1> | |
24 | static uptr internal_syscall(u64 nr, T1 arg1) { | |
25 | u64 retval; | |
26 | asm volatile("syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1) : | |
27 | "rcx", "r11", "memory", "cc"); | |
28 | return retval; | |
29 | } | |
30 | ||
31 | template <typename T1, typename T2> | |
32 | static uptr internal_syscall(u64 nr, T1 arg1, T2 arg2) { | |
33 | u64 retval; | |
34 | asm volatile("syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1), | |
35 | "S"((u64)arg2) : "rcx", "r11", "memory", "cc"); | |
36 | return retval; | |
37 | } | |
38 | ||
39 | template <typename T1, typename T2, typename T3> | |
40 | static uptr internal_syscall(u64 nr, T1 arg1, T2 arg2, T3 arg3) { | |
41 | u64 retval; | |
42 | asm volatile("syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1), | |
43 | "S"((u64)arg2), "d"((u64)arg3) : "rcx", "r11", "memory", "cc"); | |
44 | return retval; | |
45 | } | |
46 | ||
47 | template <typename T1, typename T2, typename T3, typename T4> | |
48 | static uptr internal_syscall(u64 nr, T1 arg1, T2 arg2, T3 arg3, T4 arg4) { | |
49 | u64 retval; | |
50 | asm volatile("mov %5, %%r10;" | |
51 | "syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1), | |
52 | "S"((u64)arg2), "d"((u64)arg3), "r"((u64)arg4) : | |
53 | "rcx", "r11", "r10", "memory", "cc"); | |
54 | return retval; | |
55 | } | |
56 | ||
57 | template <typename T1, typename T2, typename T3, typename T4, typename T5> | |
58 | static uptr internal_syscall(u64 nr, T1 arg1, T2 arg2, T3 arg3, T4 arg4, | |
59 | T5 arg5) { | |
60 | u64 retval; | |
61 | asm volatile("mov %5, %%r10;" | |
62 | "mov %6, %%r8;" | |
63 | "syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1), | |
64 | "S"((u64)arg2), "d"((u64)arg3), "r"((u64)arg4), "r"((u64)arg5) : | |
65 | "rcx", "r11", "r10", "r8", "memory", "cc"); | |
66 | return retval; | |
67 | } | |
68 | ||
69 | template <typename T1, typename T2, typename T3, typename T4, typename T5, | |
70 | typename T6> | |
71 | static uptr internal_syscall(u64 nr, T1 arg1, T2 arg2, T3 arg3, T4 arg4, | |
72 | T5 arg5, T6 arg6) { | |
73 | u64 retval; | |
74 | asm volatile("mov %5, %%r10;" | |
75 | "mov %6, %%r8;" | |
76 | "mov %7, %%r9;" | |
77 | "syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1), | |
78 | "S"((u64)arg2), "d"((u64)arg3), "r"((u64)arg4), "r"((u64)arg5), | |
79 | "r"((u64)arg6) : "rcx", "r11", "r10", "r8", "r9", | |
80 | "memory", "cc"); | |
81 | return retval; | |
82 | } | |
83 | ||
84 | bool internal_iserror(uptr retval, int *rverrno) { | |
85 | if (retval >= (uptr)-4095) { | |
86 | if (rverrno) | |
87 | *rverrno = -retval; | |
88 | return true; | |
89 | } | |
90 | return false; | |
91 | } |