0c8af33262be025def2108352f9a720d9559ffdb |
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03-Oct-2013 |
Dmitry Vyukov <dvyukov@google.com> |
asan/msan/tsan: fix broken linux syscalls Currently the following source code: u64 NanoTime() { kernel_timeval tv = {}; internal_syscall(__NR_gettimeofday, &tv, 0); return (u64)tv.tv_sec * 1000*1000*1000 + tv.tv_usec * 1000; } generates the following assembly: Dump of assembler code for function __sanitizer::NanoTime(): => 0x00007ff30657d380 <+0>: lea -0x10(%rsp),%rdi 0x00007ff30657d385 <+5>: xor %esi,%esi 0x00007ff30657d387 <+7>: mov $0x60,%eax 0x00007ff30657d38c <+12>: syscall 0x00007ff30657d38e <+14>: mov $0,%eax 0x00007ff30657d393 <+19>: retq with this change: Dump of assembler code for function __sanitizer::NanoTime(): => 0x00007faab834f380 <+0>: movq $0x0,-0x10(%rsp) 0x00007faab834f389 <+9>: movq $0x0,-0x8(%rsp) 0x00007faab834f392 <+18>: lea -0x10(%rsp),%rdi 0x00007faab834f397 <+23>: xor %esi,%esi 0x00007faab834f399 <+25>: mov $0x60,%eax 0x00007faab834f39e <+30>: syscall 0x00007faab834f3a0 <+32>: mov -0x8(%rsp),%rax 0x00007faab834f3a5 <+37>: mov -0x10(%rsp),%rcx 0x00007faab834f3aa <+42>: imul $0x3e8,%rax,%rdx 0x00007faab834f3b1 <+49>: imul $0x3b9aca00,%rcx,%rax 0x00007faab834f3b8 <+56>: add %rdx,%rax 0x00007faab834f3bb <+59>: retq git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@191908 91177308-0d34-0410-b5e6-96231b3b80d8
/external/compiler-rt/lib/sanitizer_common/sanitizer_syscall_linux_x86_64.inc
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