/*
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* Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2014-2018 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "defs.h"
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#include "xlat/kexec_load_flags.h"
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#include "xlat/kexec_arch_values.h"
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#ifndef KEXEC_ARCH_MASK
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# define KEXEC_ARCH_MASK 0xffff0000
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#endif
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#ifndef KEXEC_SEGMENT_MAX
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# define KEXEC_SEGMENT_MAX 16
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#endif
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static bool
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print_seg(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
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{
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const kernel_ulong_t *seg;
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kernel_ulong_t seg_buf[4];
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if (elem_size < sizeof(seg_buf)) {
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(seg_buf); ++i)
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seg_buf[i] = ((unsigned int *) elem_buf)[i];
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seg = seg_buf;
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} else {
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seg = elem_buf;
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}
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tprints("{buf=");
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printaddr(seg[0]);
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tprintf(", bufsz=%" PRI_klu ", mem=", seg[1]);
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printaddr(seg[2]);
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tprintf(", memsz=%" PRI_klu "}", seg[3]);
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return true;
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}
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static void
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print_kexec_segments(struct tcb *const tcp, const kernel_ulong_t addr,
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const kernel_ulong_t len)
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{
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if (len > KEXEC_SEGMENT_MAX) {
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printaddr(addr);
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return;
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}
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kernel_ulong_t seg[4];
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const size_t sizeof_seg = ARRAY_SIZE(seg) * current_wordsize;
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print_array(tcp, addr, len, seg, sizeof_seg,
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tfetch_mem, print_seg, 0);
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}
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SYS_FUNC(kexec_load)
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{
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/* entry, nr_segments */
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printaddr(tcp->u_arg[0]);
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tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
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/* segments */
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print_kexec_segments(tcp, tcp->u_arg[2], tcp->u_arg[1]);
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tprints(", ");
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/* flags */
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kernel_ulong_t n = tcp->u_arg[3];
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printxval64(kexec_arch_values, n & KEXEC_ARCH_MASK, "KEXEC_ARCH_???");
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n &= ~(kernel_ulong_t) KEXEC_ARCH_MASK;
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if (n) {
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tprints("|");
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printflags64(kexec_load_flags, n, "KEXEC_???");
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}
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return RVAL_DECODED;
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}
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#include "xlat/kexec_file_load_flags.h"
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SYS_FUNC(kexec_file_load)
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{
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/* kernel_fd */
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printfd(tcp, tcp->u_arg[0]);
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tprints(", ");
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/* initrd_fd */
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printfd(tcp, tcp->u_arg[1]);
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tprints(", ");
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/* cmdline_len */
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tprintf("%" PRI_klu ", ", tcp->u_arg[2]);
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/* cmdline */
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printstrn(tcp, tcp->u_arg[3], tcp->u_arg[2]);
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tprints(", ");
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/* flags */
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printflags64(kexec_file_load_flags, tcp->u_arg[4], "KEXEC_FILE_???");
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return RVAL_DECODED;
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}
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