/*
* Fetch 64bit argument at position arg_no and
* return the index of the next argument.
*/
int
getllval(struct tcb *tcp, unsigned long long *val, int arg_no)
{
#if SIZEOF_KERNEL_LONG_T > 4
# ifndef current_klongsize
if (current_klongsize < SIZEOF_KERNEL_LONG_T) {
# if defined(AARCH64) || defined(POWERPC64)
/* Align arg_no to the next even number. */
arg_no = (arg_no + 1) & 0xe;
# endif /* AARCH64 || POWERPC64 */
*val = ULONG_LONG(tcp->u_arg[arg_no], tcp->u_arg[arg_no + 1]);
arg_no += 2;
} else
# endif /* !current_klongsize */
{
*val = tcp->u_arg[arg_no];
arg_no++;
}
#else /* SIZEOF_KERNEL_LONG_T == 4 */
# if defined __ARM_EABI__ \
|| defined LINUX_MIPSO32 \
|| defined POWERPC \
|| defined XTENSA
/* Align arg_no to the next even number. */
arg_no = (arg_no + 1) & 0xe;
# elif defined SH
/*
* The SH4 ABI does allow long longs in odd-numbered registers, but
* does not allow them to be split between registers and memory - and
* there are only four argument registers for normal functions. As a
* result, pread, for example, takes an extra padding argument before
* the offset. This was changed late in the 2.4 series (around 2.4.20).
*/
if (arg_no == 3)
arg_no++;
# endif /* __ARM_EABI__ || LINUX_MIPSO32 || POWERPC || XTENSA || SH */
*val = ULONG_LONG(tcp->u_arg[arg_no], tcp->u_arg[arg_no + 1]);
arg_no += 2;
#endif
return arg_no;
}
static void
decode_new_sigaction(struct tcb *const tcp, const kernel_ulong_t addr)
{
struct new_sigaction sa;
#ifndef current_wordsize
if (current_wordsize < sizeof(sa.sa_handler__)) {
struct new_sigaction32 sa32;
if (umove_or_printaddr(tcp, addr, &sa32))
return;
memset(&sa, 0, sizeof(sa));
sa.sa_handler__ = sa32.sa_handler__;
sa.sa_flags = sa32.sa_flags;
#if HAVE_SA_RESTORER && defined SA_RESTORER
sa.sa_restorer = sa32.sa_restorer;
#endif
/* Kernel treats sa_mask as an array of longs.
* For 32-bit process, "long" is uint32_t, thus, for example,
* 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
* But for (64-bit) kernel, 32th bit in sa_mask is
* 32th bit in 0th (64-bit) long!
* For little-endian, it's the same.
* For big-endian, we swap 32-bit words.
*/
sa.sa_mask[0] = ULONG_LONG(sa32.sa_mask[0], sa32.sa_mask[1]);
} else
#endif
if (umove_or_printaddr(tcp, addr, &sa))
return;
tprints("{sa_handler=");
print_sa_handler(sa.sa_handler__);
tprints(", sa_mask=");
/*
* Sigset size is in tcp->u_arg[4] (SPARC)
* or in tcp->u_arg[3] (all other),
* but kernel won't handle sys_rt_sigaction
* with wrong sigset size (just returns EINVAL instead).
* We just fetch the right size, which is NSIG_BYTES.
*/
tprintsigmask_val("", sa.sa_mask);
tprints(", sa_flags=");
printflags(sigact_flags, sa.sa_flags, "SA_???");
#if HAVE_SA_RESTORER && defined SA_RESTORER
if (sa.sa_flags & SA_RESTORER) {
tprints(", sa_restorer=");
printaddr(sa.sa_restorer);
}
#endif
tprints("}");
}