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/*
* Copyright (c) 2015 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2015-2020 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#include "xlat/kcmp_types.h"
struct strace_kcmp_epoll_slot {
uint32_t efd;
uint32_t tfd;
uint32_t toff;
};
#define PRINT_FIELD_PIDFD(where_, field_, tcp_, pid_) \
do { \
tprints_field_name(#field_); \
printfd_pid_tracee_ns((tcp_), (pid_), (where_).field_); \
} while (0)
SYS_FUNC(kcmp)
{
pid_t pid1 = tcp->u_arg[0];
pid_t pid2 = tcp->u_arg[1];
int type = tcp->u_arg[2];
kernel_ulong_t idx1 = tcp->u_arg[3];
kernel_ulong_t idx2 = tcp->u_arg[4];
printpid(tcp, pid1, PT_TGID);
tprints(", ");
printpid(tcp, pid2, PT_TGID);
tprints(", ");
printxval(kcmp_types, type, "KCMP_???");
switch (type) {
case KCMP_FILE:
tprints(", ");
printfd_pid_tracee_ns(tcp, pid1, idx1);
tprints(", ");
printfd_pid_tracee_ns(tcp, pid2, idx2);
break;
case KCMP_EPOLL_TFD: {
struct strace_kcmp_epoll_slot slot;
tprints(", ");
printfd_pid_tracee_ns(tcp, pid1, idx1);
tprints(", ");
if (umove_or_printaddr(tcp, idx2, &slot))
break;
tprint_struct_begin();
PRINT_FIELD_PIDFD(slot, efd, tcp, pid2);
tprint_struct_next();
PRINT_FIELD_PIDFD(slot, tfd, tcp, pid2);
tprint_struct_next();
PRINT_FIELD_U(slot, toff);
tprint_struct_end();
break;
}
case KCMP_FILES:
case KCMP_FS:
case KCMP_IO:
case KCMP_SIGHAND:
case KCMP_SYSVSEM:
case KCMP_VM:
break;
default:
tprintf(", %#" PRI_klx ", %#" PRI_klx, idx1, idx2);
}
return RVAL_DECODED;
}
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