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1// SPDX-License-Identifier: LGPL-2.12#include <linux/futex.h>3 4#ifndef FUTEX_WAIT_BITSET5#define FUTEX_WAIT_BITSET 96#endif7#ifndef FUTEX_WAKE_BITSET8#define FUTEX_WAKE_BITSET 109#endif10#ifndef FUTEX_WAIT_REQUEUE_PI11#define FUTEX_WAIT_REQUEUE_PI 1112#endif13#ifndef FUTEX_CMP_REQUEUE_PI14#define FUTEX_CMP_REQUEUE_PI 1215#endif16#ifndef FUTEX_CLOCK_REALTIME17#define FUTEX_CLOCK_REALTIME 25618#endif19 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_op64