62 lines
2 KiB
C
62 lines
2 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/futex.h>
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#ifndef FUTEX_WAIT_BITSET
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#define FUTEX_WAIT_BITSET 9
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#endif
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#ifndef FUTEX_WAKE_BITSET
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#define FUTEX_WAKE_BITSET 10
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#endif
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#ifndef FUTEX_WAIT_REQUEUE_PI
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#define FUTEX_WAIT_REQUEUE_PI 11
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#endif
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#ifndef FUTEX_CMP_REQUEUE_PI
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#define FUTEX_CMP_REQUEUE_PI 12
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#endif
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#ifndef FUTEX_CLOCK_REALTIME
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#define FUTEX_CLOCK_REALTIME 256
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#endif
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static size_t syscall_arg__scnprintf_futex_op(char *bf, size_t size, struct syscall_arg *arg)
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{
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enum syscall_futex_args {
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SCF_UADDR = (1 << 0),
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SCF_OP = (1 << 1),
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SCF_VAL = (1 << 2),
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SCF_TIMEOUT = (1 << 3),
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SCF_UADDR2 = (1 << 4),
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SCF_VAL3 = (1 << 5),
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};
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int op = arg->val;
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int cmd = op & FUTEX_CMD_MASK;
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size_t printed = 0;
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switch (cmd) {
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#define P_FUTEX_OP(n) case FUTEX_##n: printed = scnprintf(bf, size, #n);
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P_FUTEX_OP(WAIT); arg->mask |= SCF_VAL3|SCF_UADDR2; break;
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P_FUTEX_OP(WAKE); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
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P_FUTEX_OP(FD); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
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P_FUTEX_OP(REQUEUE); arg->mask |= SCF_VAL3|SCF_TIMEOUT; break;
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P_FUTEX_OP(CMP_REQUEUE); arg->mask |= SCF_TIMEOUT; break;
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P_FUTEX_OP(CMP_REQUEUE_PI); arg->mask |= SCF_TIMEOUT; break;
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P_FUTEX_OP(WAKE_OP); break;
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P_FUTEX_OP(LOCK_PI); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
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P_FUTEX_OP(UNLOCK_PI); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
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P_FUTEX_OP(TRYLOCK_PI); arg->mask |= SCF_VAL3|SCF_UADDR2; break;
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P_FUTEX_OP(WAIT_BITSET); arg->mask |= SCF_UADDR2; break;
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P_FUTEX_OP(WAKE_BITSET); arg->mask |= SCF_UADDR2; break;
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P_FUTEX_OP(WAIT_REQUEUE_PI); break;
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default: printed = scnprintf(bf, size, "%#x", cmd); break;
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}
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if (op & FUTEX_PRIVATE_FLAG)
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printed += scnprintf(bf + printed, size - printed, "|PRIV");
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if (op & FUTEX_CLOCK_REALTIME)
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printed += scnprintf(bf + printed, size - printed, "|CLKRT");
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return printed;
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}
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#define SCA_FUTEX_OP syscall_arg__scnprintf_futex_op
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