Dmitry V. Levin
b93d52fe3d
strace is now provided under the terms of the GNU Lesser General Public License version 2.1 or later, see COPYING for more details. strace test suite is now provided under the terms of the GNU General Public License version 2 or later, see tests/COPYING for more details.
104 lines
2.1 KiB
C
104 lines
2.1 KiB
C
/*
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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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* SPDX-License-Identifier: LGPL-2.1-or-later
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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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