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/*
* Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2014-2018 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#include "xlat/kexec_load_flags.h"
#include "xlat/kexec_arch_values.h"
#ifndef KEXEC_ARCH_MASK
# define KEXEC_ARCH_MASK 0xffff0000
#endif
#ifndef KEXEC_SEGMENT_MAX
# define KEXEC_SEGMENT_MAX 16
#endif
static bool
print_seg(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
{
const kernel_ulong_t *seg;
kernel_ulong_t seg_buf[4];
if (elem_size < sizeof(seg_buf)) {
unsigned int i;
for (i = 0; i < ARRAY_SIZE(seg_buf); ++i)
seg_buf[i] = ((unsigned int *) elem_buf)[i];
seg = seg_buf;
} else {
seg = elem_buf;
}
tprints("{buf=");
printaddr(seg[0]);
tprintf(", bufsz=%" PRI_klu ", mem=", seg[1]);
printaddr(seg[2]);
tprintf(", memsz=%" PRI_klu "}", seg[3]);
return true;
}
static void
print_kexec_segments(struct tcb *const tcp, const kernel_ulong_t addr,
const kernel_ulong_t len)
{
if (len > KEXEC_SEGMENT_MAX) {
printaddr(addr);
return;
}
kernel_ulong_t seg[4];
const size_t sizeof_seg = ARRAY_SIZE(seg) * current_wordsize;
print_array(tcp, addr, len, seg, sizeof_seg,
tfetch_mem, print_seg, 0);
}
SYS_FUNC(kexec_load)
{
/* entry, nr_segments */
printaddr(tcp->u_arg[0]);
tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
/* segments */
print_kexec_segments(tcp, tcp->u_arg[2], tcp->u_arg[1]);
tprints(", ");
/* flags */
kernel_ulong_t n = tcp->u_arg[3];
printxval64(kexec_arch_values, n & KEXEC_ARCH_MASK, "KEXEC_ARCH_???");
n &= ~(kernel_ulong_t) KEXEC_ARCH_MASK;
if (n) {
tprints("|");
printflags64(kexec_load_flags, n, "KEXEC_???");
}
return RVAL_DECODED;
}
#include "xlat/kexec_file_load_flags.h"
SYS_FUNC(kexec_file_load)
{
/* kernel_fd */
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
/* initrd_fd */
printfd(tcp, tcp->u_arg[1]);
tprints(", ");
/* cmdline_len */
tprintf("%" PRI_klu ", ", tcp->u_arg[2]);
/* cmdline */
printstrn(tcp, tcp->u_arg[3], tcp->u_arg[2]);
tprints(", ");
/* flags */
printflags64(kexec_file_load_flags, tcp->u_arg[4], "KEXEC_FILE_???");
return RVAL_DECODED;
}
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