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linux: Fix __NSIG_WORDS and add __NSIG_BYTES

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The __NSIG_WORDS value is based on minimum number of words to hold
the maximum number of signals supported by the architecture.

This patch also adds __NSIG_BYTES, which is the number of bytes
required to represent the supported number of signals.  It is used in
syscalls which takes a sigset_t.

Checked on x86_64-linux-gnu and i686-linux-gnu.

Tested-by: Carlos O'Donell <carlos@redhat.com>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Adhemerval Zanella
2020-04-23 10:58:01 -03:00
parent f13d260190
commit f26d456b98
15 changed files with 42 additions and 27 deletions
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3
sysdeps/unix/sysv/linux/sigaction.c
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@ -57,7 +57,8 @@ __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
real size of the user-level sigset_t. */
result = INLINE_SYSCALL_CALL (rt_sigaction, sig,
act ? &kact : NULL,
oact ? &koact : NULL, STUB (act, _NSIG / 8));
oact ? &koact : NULL, STUB (act,
__NSIG_BYTES));
if (oact && result >= 0)
{