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/*
* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993-1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
* Copyright (c) 2005-2015 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2015 Elvira Khabirova <lineprinter0@gmail.com>
* Copyright (c) 2015-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#include DEF_MPERS_TYPE(stack_t)
#include <signal.h>
#include MPERS_DEFS
#include "xlat/sigaltstack_flags.h"
static void
print_stack_t(struct tcb *const tcp, const kernel_ulong_t addr)
{
stack_t ss;
if (umove_or_printaddr(tcp, addr, &ss))
return;
tprint_struct_begin();
PRINT_FIELD_PTR(ss, ss_sp);
tprint_struct_next();
PRINT_FIELD_FLAGS(ss, ss_flags, sigaltstack_flags, "SS_???");
tprint_struct_next();
PRINT_FIELD_U(ss, ss_size);
tprint_struct_end();
}
SYS_FUNC(sigaltstack)
{
if (entering(tcp)) {
/* ss */
print_stack_t(tcp, tcp->u_arg[0]);
tprint_arg_next();
} else {
/* old_ss */
print_stack_t(tcp, tcp->u_arg[1]);
}
return 0;
}
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