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src/fetch_indirect_syscall_args.c
35 строк
852 B
Dmitry V. Levin
Update copyright headers
16 фев 2021, 11:00
16 фев 2021, 11:00
8fa8a88
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/* * Copyright (c) 2018-2021 The strace developers. * All rights reserved. * * SPDX-License-Identifier: LGPL-2.1-or-later */ #include "defs.h" /* * Fetch indirect syscall arguments that are provided as an array. * Return a pointer to a static array of kernel_ulong_t elements, * or NULL in case of fetch failure. */ kernel_ulong_t * fetch_indirect_syscall_args(struct tcb *const tcp, const kernel_ulong_t addr, const unsigned int n_args) { static kernel_ulong_t u_arg[MAX_ARGS]; if (current_wordsize == sizeof(*u_arg)) { if (umoven(tcp, addr, sizeof(*u_arg) * n_args, u_arg)) return NULL; } else { uint32_t narrow_arg[ARRAY_SIZE(u_arg)]; if (umoven(tcp, addr, sizeof(*narrow_arg) * n_args, narrow_arg)) return NULL; for (unsigned int i = 0; i < n_args; ++i) u_arg[i] = narrow_arg[i]; } return u_arg; }