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/*
* Copyright (c) 2018 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "defs.h"
#include <linux/ioctl.h>
#include "perf_event_struct.h"
#define XLAT_MACROS_ONLY
# include "xlat/perf_ioctl_cmds.h"
#undef XLAT_MACROS_ONLY
#include "xlat/perf_ioctl_flags.h"
#include MPERS_DEFS
static int
perf_ioctl_query_bpf(struct tcb *const tcp, const kernel_ulong_t arg)
{
uint32_t info;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &info))
return RVAL_IOCTL_DECODED;
tprintf("{ids_len=%u, ", info);
return 0;
}
if (syserror(tcp) ||
umove(tcp, arg + offsetof(struct perf_event_query_bpf, prog_cnt),
&info)) {
tprints("...}");
return RVAL_IOCTL_DECODED;
}
tprintf("prog_cnt=%u, ids=", info);
print_array(tcp, arg + offsetof(struct perf_event_query_bpf, ids), info,
&info, sizeof(info),
tfetch_mem, print_uint32_array_member, NULL);
tprints("}");
return RVAL_IOCTL_DECODED;
}
static int
perf_ioctl_modify_attributes(struct tcb *const tcp, const kernel_ulong_t arg)
{
tprints(", ");
if (!fetch_perf_event_attr(tcp, arg))
print_perf_event_attr(tcp, arg);
return RVAL_IOCTL_DECODED;
}
MPERS_PRINTER_DECL(int, perf_ioctl,
struct tcb *const tcp, const unsigned int code,
const kernel_ulong_t arg)
{
switch (code) {
case PERF_EVENT_IOC_ENABLE:
case PERF_EVENT_IOC_DISABLE:
case PERF_EVENT_IOC_RESET:
tprints(", ");
printflags(perf_ioctl_flags, arg, "PERF_IOC_FLAG_???");
return RVAL_IOCTL_DECODED;
case PERF_EVENT_IOC_REFRESH:
tprintf(", %d", (int) arg);
return RVAL_IOCTL_DECODED;
case PERF_EVENT_IOC_PERIOD:
tprints(", ");
printnum_int64(tcp, arg, "%" PRIu64);
return RVAL_IOCTL_DECODED;
case PERF_EVENT_IOC_SET_OUTPUT:
case PERF_EVENT_IOC_SET_BPF:
tprintf(", ");
printfd(tcp, (int) arg);
return RVAL_IOCTL_DECODED;
case PERF_EVENT_IOC_PAUSE_OUTPUT:
tprintf(", %" PRI_klu, arg);
return RVAL_IOCTL_DECODED;
/*
* The following ioctl requests are personality-specific
* due to the pointer size.
*/
case PERF_EVENT_IOC_SET_FILTER:
tprints(", ");
printstr_ex(tcp, arg, get_pagesize(), QUOTE_0_TERMINATED);
return RVAL_IOCTL_DECODED;
case PERF_EVENT_IOC_ID:
if (entering(tcp)) {
tprints(", ");
return 0;
}
printnum_int64(tcp, arg, "%" PRIu64);
return RVAL_IOCTL_DECODED;
case PERF_EVENT_IOC_QUERY_BPF:
return perf_ioctl_query_bpf(tcp, arg);
case PERF_EVENT_IOC_MODIFY_ATTRIBUTES:
return perf_ioctl_modify_attributes(tcp, arg);
default:
return RVAL_DECODED;
}
}
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