1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include <errno.h>
6 #include <sched.h>
7 #include <stdlib.h>
8 #include <sys/time.h>
9 #include <time.h>
10 #include <unistd.h>
11
12 #include "components/nacl/loader/nonsfi/abi_conversion.h"
13 #include "components/nacl/loader/nonsfi/irt_interfaces.h"
14 #include "components/nacl/loader/nonsfi/irt_util.h"
15 #include "native_client/src/trusted/service_runtime/include/sys/time.h"
16 #include "native_client/src/trusted/service_runtime/include/sys/unistd.h"
17
18 namespace nacl {
19 namespace nonsfi {
20 namespace {
21
IrtExit(int status)22 void IrtExit(int status) {
23 _exit(status);
24 }
25
IrtGetToD(struct nacl_abi_timeval * tv)26 int IrtGetToD(struct nacl_abi_timeval* tv) {
27 struct timeval host_tv;
28 if (gettimeofday(&host_tv, NULL))
29 return errno;
30 tv->nacl_abi_tv_sec = host_tv.tv_sec;
31 tv->nacl_abi_tv_usec = host_tv.tv_usec;
32 return 0;
33 }
34
IrtClock(nacl_abi_clock_t * ticks)35 int IrtClock(nacl_abi_clock_t* ticks) {
36 // There is no definition of errno when clock is failed.
37 // So we assume it always succeeds.
38 *ticks = clock();
39 return 0;
40 }
41
IrtNanoSleep(const struct nacl_abi_timespec * req,struct nacl_abi_timespec * rem)42 int IrtNanoSleep(const struct nacl_abi_timespec* req,
43 struct nacl_abi_timespec* rem) {
44 struct timespec host_req;
45 NaClAbiTimeSpecToTimeSpec(*req, &host_req);
46 struct timespec host_rem;
47 if (nanosleep(&host_req, &host_rem))
48 return errno;
49
50 if (rem)
51 TimeSpecToNaClAbiTimeSpec(host_rem, rem);
52 return 0;
53 }
54
IrtSchedYield()55 int IrtSchedYield() {
56 return CheckError(sched_yield());
57 }
58
IrtSysconf(int name,int * value)59 int IrtSysconf(int name, int* value) {
60 int result;
61 switch (name) {
62 case NACL_ABI__SC_NPROCESSORS_ONLN:
63 errno = 0;
64 result = sysconf(_SC_NPROCESSORS_ONLN);
65 break;
66 case NACL_ABI__SC_PAGESIZE:
67 errno = 0;
68 result = sysconf(_SC_PAGESIZE);
69 break;
70 default:
71 return EINVAL;
72 }
73
74 if (result == -1 && errno == EINVAL)
75 return EINVAL;
76
77 *value = result;
78 return 0;
79 }
80
81 } // namespace
82
83 // For gettod, clock and nanosleep, their argument types should be nacl_abi_X,
84 // rather than host type, such as timeval or clock_t etc. However, the
85 // definition of nacl_irt_basic uses host types, so here we need to cast them.
86 const nacl_irt_basic kIrtBasic = {
87 IrtExit,
88 reinterpret_cast<int(*)(struct timeval*)>(IrtGetToD),
89 reinterpret_cast<int(*)(clock_t*)>(IrtClock),
90 reinterpret_cast<int(*)(const struct timespec*, struct timespec*)>(
91 IrtNanoSleep),
92 IrtSchedYield,
93 IrtSysconf,
94 };
95
96 } // namespace nonsfi
97 } // namespace nacl
98