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/*
* Check decoding of sigaction syscall.
*
* Copyright (c) 2014-2018 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2014-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#ifdef __NR_sigaction
# include <signal.h>
# include <stdint.h>
# include <stdio.h>
# include <string.h>
# include <unistd.h>
struct set_sa {
# if defined MIPS
unsigned int flags;
unsigned long handler;
unsigned long mask[1];
# elif defined ALPHA
unsigned long handler;
unsigned long mask[1];
unsigned int flags;
# else
unsigned long handler;
unsigned long mask[1];
unsigned long flags;
unsigned long restorer;
# endif
}
# ifdef ALPHA
ATTRIBUTE_PACKED
# endif
;
typedef struct set_sa struct_set_sa;
# ifdef MIPS
struct get_sa {
unsigned int flags;
unsigned long handler;
unsigned long mask[4];
};
typedef struct get_sa struct_get_sa;
# else
typedef struct set_sa struct_get_sa;
# endif
static long
k_sigaction(const kernel_ulong_t signum, const kernel_ulong_t new_act,
const kernel_ulong_t old_act)
{
return syscall(__NR_sigaction, signum, new_act, old_act);
}
# if defined SPARC || defined SPARC64
/*
* See arch/sparc/kernel/sys_sparc_32.c:sys_sparc_sigaction
* and arch/sparc/kernel/sys_sparc32.c:compat_sys_sparc_sigaction
*/
# define ADDR_INT ((unsigned int) -0xdefaced)
# define SIGNO_INT ((unsigned int) -SIGUSR1)
# define SIG_STR "-SIGUSR1"
# else
# define ADDR_INT ((unsigned int) 0xdefaced)
# define SIGNO_INT ((unsigned int) SIGUSR1)
# define SIG_STR "SIGUSR1"
# endif
static const kernel_ulong_t signo =
(kernel_ulong_t) 0xbadc0ded00000000ULL | SIGNO_INT;
static const kernel_ulong_t addr =
(kernel_ulong_t) 0xfacefeed00000000ULL | ADDR_INT;
int
main(void)
{
union {
sigset_t libc[1];
unsigned long old[1];
} mask;
TAIL_ALLOC_OBJECT_CONST_PTR(struct_set_sa, new_act);
TAIL_ALLOC_OBJECT_CONST_PTR(struct_get_sa, old_act);
if (k_sigaction(signo, 0, 0))
perror_msg_and_skip("sigaction");
puts("sigaction(" SIG_STR ", NULL, NULL) = 0");
k_sigaction(signo, 0, 0);
puts("sigaction(" SIG_STR ", NULL, NULL) = 0");
k_sigaction(signo, (uintptr_t) (new_act + 1), 0);
printf("sigaction(" SIG_STR ", %p, NULL) = -1 EFAULT (%m)\n",
new_act + 1);
k_sigaction(signo, (uintptr_t) new_act + 2, 0);
printf("sigaction(" SIG_STR ", %#lx, NULL) = -1 EFAULT (%m)\n",
(unsigned long) new_act + 2);
k_sigaction(signo, 0, (uintptr_t) (old_act + 1));
printf("sigaction(" SIG_STR ", NULL, %p) = -1 EFAULT (%m)\n",
old_act + 1);
k_sigaction(signo, 0, (uintptr_t) old_act + 2);
printf("sigaction(" SIG_STR ", NULL, %#lx) = -1 EFAULT (%m)\n",
(unsigned long) old_act + 2);
k_sigaction(addr, 0, 0);
printf("sigaction(%d, NULL, NULL) = -1 EINVAL (%m)\n", ADDR_INT);
memset(new_act, 0, sizeof(*new_act));
k_sigaction(signo, (uintptr_t) new_act, 0);
puts("sigaction(" SIG_STR ", {sa_handler=SIG_DFL, sa_mask=[]"
", sa_flags=0}, NULL) = 0");
sigemptyset(mask.libc);
sigaddset(mask.libc, SIGHUP);
sigaddset(mask.libc, SIGINT);
new_act->handler = (uintptr_t) SIG_IGN;
memcpy(new_act->mask, mask.old, sizeof(mask.old));
new_act->flags = SA_SIGINFO;
k_sigaction(signo, (uintptr_t) new_act, (uintptr_t) old_act);
puts("sigaction(" SIG_STR ", {sa_handler=SIG_IGN, sa_mask=[HUP INT]"
", sa_flags=SA_SIGINFO}, {sa_handler=SIG_DFL, sa_mask=[]"
", sa_flags=0}) = 0");
sigemptyset(mask.libc);
sigaddset(mask.libc, SIGQUIT);
sigaddset(mask.libc, SIGTERM);
new_act->handler = (unsigned long) addr;
memcpy(new_act->mask, mask.old, sizeof(mask.old));
new_act->flags = SA_ONSTACK | SA_RESTART;
k_sigaction(signo, (uintptr_t) new_act, (uintptr_t) old_act);
printf("sigaction(" SIG_STR ", {sa_handler=%#lx, sa_mask=[QUIT TERM]"
", sa_flags=SA_ONSTACK|SA_RESTART}, {sa_handler=SIG_IGN"
", sa_mask=[HUP INT], sa_flags=SA_SIGINFO}) = 0\n",
new_act->handler);
memset(mask.old, -1, sizeof(mask.old));
sigdelset(mask.libc, SIGHUP);
memcpy(new_act->mask, mask.old, sizeof(mask.old));
# if defined SA_RESTORER && !(defined ALPHA || defined MIPS)
new_act->flags = SA_RESTORER;
new_act->restorer = (unsigned long) 0xdeadfacecafef00dULL;
# define SA_RESTORER_FMT ", sa_flags=SA_RESTORER, sa_restorer=%#lx"
# define SA_RESTORER_ARGS , new_act->restorer
# else
new_act->flags = SA_NODEFER;
# define SA_RESTORER_FMT ", sa_flags=SA_NODEFER"
# define SA_RESTORER_ARGS
# endif
k_sigaction(signo, (uintptr_t) new_act, (uintptr_t) old_act);
printf("sigaction(" SIG_STR ", {sa_handler=%#lx, sa_mask=~[HUP]"
SA_RESTORER_FMT "}, {sa_handler=%#lx, sa_mask=[QUIT TERM]"
", sa_flags=SA_ONSTACK|SA_RESTART}) = 0\n",
new_act->handler SA_RESTORER_ARGS,
new_act->handler);
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_sigaction")
#endif
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