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| //===-- sanitizer_syscall_linux_x86_64.inc ----------------------*- C++ -*-===//
| //
| // The LLVM Compiler Infrastructure
| //
| // This file is distributed under the University of Illinois Open Source
| // License. See LICENSE.TXT for details.
| //
| //===----------------------------------------------------------------------===//
| //
| // Implementations of internal_syscall and internal_iserror for Linux/x86_64.
| //
| //===----------------------------------------------------------------------===//
|
| #define SYSCALL(name) __NR_ ## name
|
| static uptr internal_syscall(u64 nr) {
| u64 retval;
| asm volatile("syscall" : "=a"(retval) : "a"(nr) : "rcx", "r11",
| "memory", "cc");
| return retval;
| }
|
| template <typename T1>
| static uptr internal_syscall(u64 nr, T1 arg1) {
| u64 retval;
| asm volatile("syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1) :
| "rcx", "r11", "memory", "cc");
| return retval;
| }
|
| template <typename T1, typename T2>
| static uptr internal_syscall(u64 nr, T1 arg1, T2 arg2) {
| u64 retval;
| asm volatile("syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1),
| "S"((u64)arg2) : "rcx", "r11", "memory", "cc");
| return retval;
| }
|
| template <typename T1, typename T2, typename T3>
| static uptr internal_syscall(u64 nr, T1 arg1, T2 arg2, T3 arg3) {
| u64 retval;
| asm volatile("syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1),
| "S"((u64)arg2), "d"((u64)arg3) : "rcx", "r11", "memory", "cc");
| return retval;
| }
|
| template <typename T1, typename T2, typename T3, typename T4>
| static uptr internal_syscall(u64 nr, T1 arg1, T2 arg2, T3 arg3, T4 arg4) {
| u64 retval;
| asm volatile("mov %5, %%r10;"
| "syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1),
| "S"((u64)arg2), "d"((u64)arg3), "r"((u64)arg4) :
| "rcx", "r11", "r10", "memory", "cc");
| return retval;
| }
|
| template <typename T1, typename T2, typename T3, typename T4, typename T5>
| static uptr internal_syscall(u64 nr, T1 arg1, T2 arg2, T3 arg3, T4 arg4,
| T5 arg5) {
| u64 retval;
| asm volatile("mov %5, %%r10;"
| "mov %6, %%r8;"
| "syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1),
| "S"((u64)arg2), "d"((u64)arg3), "r"((u64)arg4), "r"((u64)arg5) :
| "rcx", "r11", "r10", "r8", "memory", "cc");
| return retval;
| }
|
| template <typename T1, typename T2, typename T3, typename T4, typename T5,
| typename T6>
| static uptr internal_syscall(u64 nr, T1 arg1, T2 arg2, T3 arg3, T4 arg4,
| T5 arg5, T6 arg6) {
| u64 retval;
| asm volatile("mov %5, %%r10;"
| "mov %6, %%r8;"
| "mov %7, %%r9;"
| "syscall" : "=a"(retval) : "a"(nr), "D"((u64)arg1),
| "S"((u64)arg2), "d"((u64)arg3), "r"((u64)arg4), "r"((u64)arg5),
| "r"((u64)arg6) : "rcx", "r11", "r10", "r8", "r9",
| "memory", "cc");
| return retval;
| }
|
| bool internal_iserror(uptr retval, int *rverrno) {
| if (retval >= (uptr)-4095) {
| if (rverrno)
| *rverrno = -retval;
| return true;
| }
| return false;
| }
|
|
