cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

perf_event_open.c (1136B)

      1// SPDX-License-Identifier: LGPL-2.1
      2#ifndef PERF_FLAG_FD_NO_GROUP
      3# define PERF_FLAG_FD_NO_GROUP		(1UL << 0)
      4#endif
      5
      6#ifndef PERF_FLAG_FD_OUTPUT
      7# define PERF_FLAG_FD_OUTPUT		(1UL << 1)
      8#endif
      9
     10#ifndef PERF_FLAG_PID_CGROUP
     11# define PERF_FLAG_PID_CGROUP		(1UL << 2) /* pid=cgroup id, per-cpu mode only */
     12#endif
     13
     14#ifndef PERF_FLAG_FD_CLOEXEC
     15# define PERF_FLAG_FD_CLOEXEC		(1UL << 3) /* O_CLOEXEC */
     16#endif
     17
     18static size_t syscall_arg__scnprintf_perf_flags(char *bf, size_t size,
     19						struct syscall_arg *arg)
     20{
     21	bool show_prefix = arg->show_string_prefix;
     22	const char *prefix = "PERF_";
     23	int printed = 0, flags = arg->val;
     24
     25	if (flags == 0)
     26		return 0;
     27
     28#define	P_FLAG(n) \
     29	if (flags & PERF_FLAG_##n) { \
     30		printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
     31		flags &= ~PERF_FLAG_##n; \
     32	}
     33
     34	P_FLAG(FD_NO_GROUP);
     35	P_FLAG(FD_OUTPUT);
     36	P_FLAG(PID_CGROUP);
     37	P_FLAG(FD_CLOEXEC);
     38#undef P_FLAG
     39
     40	if (flags)
     41		printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
     42
     43	return printed;
     44}
     45
     46#define SCA_PERF_FLAGS syscall_arg__scnprintf_perf_flags