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

futex_op.c (2248B)

      1// SPDX-License-Identifier: LGPL-2.1
      2#include <linux/futex.h>
      3
      4#ifndef FUTEX_WAIT_BITSET
      5#define FUTEX_WAIT_BITSET	  9
      6#endif
      7#ifndef FUTEX_WAKE_BITSET
      8#define FUTEX_WAKE_BITSET	 10
      9#endif
     10#ifndef FUTEX_WAIT_REQUEUE_PI
     11#define FUTEX_WAIT_REQUEUE_PI	 11
     12#endif
     13#ifndef FUTEX_CMP_REQUEUE_PI
     14#define FUTEX_CMP_REQUEUE_PI	 12
     15#endif
     16#ifndef FUTEX_CLOCK_REALTIME
     17#define FUTEX_CLOCK_REALTIME	256
     18#endif
     19
     20static size_t syscall_arg__scnprintf_futex_op(char *bf, size_t size, struct syscall_arg *arg)
     21{
     22	bool show_prefix = arg->show_string_prefix;
     23	const char *prefix = "FUTEX_";
     24	enum syscall_futex_args {
     25		SCF_UADDR   = (1 << 0),
     26		SCF_OP	    = (1 << 1),
     27		SCF_VAL	    = (1 << 2),
     28		SCF_TIMEOUT = (1 << 3),
     29		SCF_UADDR2  = (1 << 4),
     30		SCF_VAL3    = (1 << 5),
     31	};
     32	int op = arg->val;
     33	int cmd = op & FUTEX_CMD_MASK;
     34	size_t printed = 0;
     35
     36	switch (cmd) {
     37#define	P_FUTEX_OP(n) case FUTEX_##n: printed = scnprintf(bf, size, "%s%s", show_prefix ? prefix : "", #n);
     38	P_FUTEX_OP(WAIT);	    arg->mask |= SCF_VAL3|SCF_UADDR2;		  break;
     39	P_FUTEX_OP(WAKE);	    arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
     40	P_FUTEX_OP(FD);		    arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
     41	P_FUTEX_OP(REQUEUE);	    arg->mask |= SCF_VAL3|SCF_TIMEOUT;	          break;
     42	P_FUTEX_OP(CMP_REQUEUE);    arg->mask |= SCF_TIMEOUT;			  break;
     43	P_FUTEX_OP(CMP_REQUEUE_PI); arg->mask |= SCF_TIMEOUT;			  break;
     44	P_FUTEX_OP(WAKE_OP);							  break;
     45	P_FUTEX_OP(LOCK_PI);	    arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
     46	P_FUTEX_OP(UNLOCK_PI);	    arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
     47	P_FUTEX_OP(TRYLOCK_PI);	    arg->mask |= SCF_VAL3|SCF_UADDR2;		  break;
     48	P_FUTEX_OP(WAIT_BITSET);    arg->mask |= SCF_UADDR2;			  break;
     49	P_FUTEX_OP(WAKE_BITSET);    arg->mask |= SCF_UADDR2;			  break;
     50	P_FUTEX_OP(WAIT_REQUEUE_PI);						  break;
     51	default: printed = scnprintf(bf, size, "%#x", cmd);			  break;
     52	}
     53
     54	if (op & FUTEX_PRIVATE_FLAG)
     55		printed += scnprintf(bf + printed, size - printed, "|%s%s", show_prefix ? prefix : "", "PRIVATE_FLAG");
     56
     57	if (op & FUTEX_CLOCK_REALTIME)
     58		printed += scnprintf(bf + printed, size - printed, "|%s%s", show_prefix ? prefix : "", "CLOCK_REALTIME");
     59
     60	return printed;
     61}
     62
     63#define SCA_FUTEX_OP  syscall_arg__scnprintf_futex_op