int
sys_pselect6(struct tcb *tcp)
{
int rc = decode_select(tcp, tcp->u_arg, BITNESS_CURRENT);
if (entering(tcp)) {
long r;
struct {
unsigned long ptr;
unsigned long len;
} data;
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
if (current_wordsize == 4) {
struct {
uint32_t ptr;
uint32_t len;
} data32;
r = umove(tcp, tcp->u_arg[5], &data32);
data.ptr = data32.ptr;
data.len = data32.len;
} else
#endif
r = umove(tcp, tcp->u_arg[5], &data);
if (r < 0)
tprintf(", %#lx", tcp->u_arg[5]);
else {
tprints(", {");
/* NB: kernel requires data.len == NSIG / 8 */
print_sigset_addr_len(tcp, data.ptr, data.len);
tprintf(", %lu}", data.len);
}
}
return rc;
}
int sys_rt_sigtimedwait(struct tcb *tcp)
{
/* NB: kernel requires arg[3] == NSIG / 8 */
if (entering(tcp)) {
print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[3]);
tprints(", ");
/* This is the only "return" parameter, */
if (tcp->u_arg[1] != 0)
return 0;
/* ... if it's NULL, can decode all on entry */
tprints("NULL, ");
}
else if (tcp->u_arg[1] != 0) {
/* syscall exit, and u_arg[1] wasn't NULL */
printsiginfo_at(tcp, tcp->u_arg[1]);
tprints(", ");
}
else {
/* syscall exit, and u_arg[1] was NULL */
return 0;
}
print_timespec(tcp, tcp->u_arg[2]);
tprintf(", %lu", tcp->u_arg[3]);
return 0;
};
int
sys_rt_sigsuspend(struct tcb *tcp)
{
if (entering(tcp)) {
/* NB: kernel requires arg[1] == NSIG / 8 */
print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
tprintf(", %lu", tcp->u_arg[1]);
}
return 0;
}
int
sys_rt_sigprocmask(struct tcb *tcp)
{
/* Note: arg[3] is the length of the sigset. Kernel requires NSIG / 8 */
if (entering(tcp)) {
printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
tprints(", ");
print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[3]);
tprints(", ");
}
else {
if (syserror(tcp))
tprintf("%#lx", tcp->u_arg[2]);
else
print_sigset_addr_len(tcp, tcp->u_arg[2], tcp->u_arg[3]);
tprintf(", %lu", tcp->u_arg[3]);
}
return 0;
}
int
sys_sigpending(struct tcb *tcp)
{
if (exiting(tcp)) {
if (syserror(tcp))
tprintf("%#lx", tcp->u_arg[0]);
else
print_sigset_addr_len(tcp, tcp->u_arg[0], current_wordsize);
}
return 0;
}
static void
arch_sigreturn(struct tcb *tcp)
{
/* offset of ucontext in the kernel's sigframe structure */
#define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(siginfo_t)
const long addr = tile_regs.sp + SIGFRAME_UC_OFFSET +
offsetof(struct ucontext, uc_sigmask);
tprints("{mask=");
print_sigset_addr_len(tcp, addr, NSIG / 8);
tprints("}");
}
int
sys_epoll_pwait(struct tcb *tcp)
{
epoll_wait_common(tcp);
if (exiting(tcp)) {
tprints(", ");
/* NB: kernel requires arg[5] == NSIG / 8 */
print_sigset_addr_len(tcp, tcp->u_arg[4], tcp->u_arg[5]);
tprintf(", %lu", tcp->u_arg[5]);
}
return 0;
}
/* "Old" sigprocmask, which operates with word-sized signal masks */
int
sys_sigprocmask(struct tcb *tcp)
{
# ifdef ALPHA
if (entering(tcp)) {
/*
* Alpha/OSF is different: it doesn't pass in two pointers,
* but rather passes in the new bitmask as an argument and
* then returns the old bitmask. This "works" because we
* only have 64 signals to worry about. If you want more,
* use of the rt_sigprocmask syscall is required.
* Alpha:
* old = osf_sigprocmask(how, new);
* Everyone else:
* ret = sigprocmask(how, &new, &old, ...);
*/
printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
tprintsigmask_val(", ", tcp->u_arg[1]);
}
else if (!syserror(tcp)) {
tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
return RVAL_HEX | RVAL_STR;
}
# else /* !ALPHA */
if (entering(tcp)) {
printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
tprints(", ");
print_sigset_addr_len(tcp, tcp->u_arg[1], current_wordsize);
tprints(", ");
}
else {
if (syserror(tcp))
tprintf("%#lx", tcp->u_arg[2]);
else
print_sigset_addr_len(tcp, tcp->u_arg[2], current_wordsize);
}
# endif /* !ALPHA */
return 0;
}
int
sys_ppoll(struct tcb *tcp)
{
int rc = decode_poll(tcp, tcp->u_arg[2]);
if (entering(tcp)) {
print_timespec(tcp, tcp->u_arg[2]);
tprints(", ");
/* NB: kernel requires arg[4] == NSIG / 8 */
print_sigset_addr_len(tcp, tcp->u_arg[3], tcp->u_arg[4]);
tprintf(", %lu", tcp->u_arg[4]);
}
return rc;
}
static int
do_signalfd(struct tcb *tcp, int flags_arg)
{
/* NB: kernel requires arg[2] == NSIG / 8 */
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[2]);
tprintf(", %lu", tcp->u_arg[2]);
if (flags_arg >= 0) {
tprints(", ");
printflags(sfd_flags, tcp->u_arg[flags_arg], "SFD_???");
}
return RVAL_DECODED | RVAL_FD;
}
static int
do_signalfd(struct tcb *tcp, int flags_arg)
{
/* NB: kernel requires arg[2] == NSIG / 8 */
if (entering(tcp)) {
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[2]);
tprintf(", %lu", tcp->u_arg[2]);
if (flags_arg >= 0) {
tprints(", ");
printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
}
}
return 0;
}
int
sys_rt_sigpending(struct tcb *tcp)
{
if (exiting(tcp)) {
/*
* One of the few syscalls where sigset size (arg[1])
* is allowed to be <= NSIG / 8, not strictly ==.
* This allows non-rt sigpending() syscall
* to reuse rt_sigpending() code in kernel.
*/
if (syserror(tcp))
tprintf("%#lx", tcp->u_arg[0]);
else
print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
tprintf(", %lu", tcp->u_arg[1]);
}
return 0;
}
static int
umove_kulong_array_or_printaddr(struct tcb *tcp, const long addr,
kernel_ulong_t *ptr, size_t n)
{
#if defined X86_64 || defined X32
if (current_personality == 1) {
#else
if (current_wordsize < sizeof(*ptr)) {
#endif
uint32_t ptr32[n];
int r = umove_or_printaddr(tcp, addr, &ptr32);
if (!r) {
size_t i;
for (i = 0; i < n; ++i)
ptr[i] = (kernel_ulong_t) ptr32[i];
}
return r;
}
return umoven_or_printaddr(tcp, addr, n * sizeof(*ptr), ptr);
}
SYS_FUNC(pselect6)
{
int rc = decode_select(tcp, tcp->u_arg, print_timespec, sprint_timespec);
if (entering(tcp)) {
kernel_ulong_t data[2];
tprints(", ");
if (!umove_kulong_array_or_printaddr(tcp, tcp->u_arg[5],
data, ARRAY_SIZE(data))) {
tprints("{");
/* NB: kernel requires data[1] == NSIG / 8 */
print_sigset_addr_len(tcp, (unsigned long) data[0],
(unsigned long) data[1]);
tprintf(", %llu}", (unsigned long long) data[1]);
}
}
return rc;
}