diff options
Diffstat (limited to 'libc/sysdeps/linux/common/bits/sigset.h')
| -rw-r--r-- | libc/sysdeps/linux/common/bits/sigset.h | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/libc/sysdeps/linux/common/bits/sigset.h b/libc/sysdeps/linux/common/bits/sigset.h index 75fa32604..2f67a4ebf 100644 --- a/libc/sysdeps/linux/common/bits/sigset.h +++ b/libc/sysdeps/linux/common/bits/sigset.h @@ -22,13 +22,24 @@ typedef int __sig_atomic_t; -/* A `sigset_t' has a bit for each signal. */ - -# define _SIGSET_NWORDS (1024 / (8 * sizeof (unsigned long int))) -typedef struct - { - unsigned long int __val[_SIGSET_NWORDS]; - } __sigset_t; +/* A 'sigset_t' has a bit for each signal. + * glibc has space for 1024 signals (!), but most arches supported + * by Linux have 64 signals, and only MIPS has 128. + * There seems to be some historical baggage in sparc[64] + * where they might have (or had in the past) 32 signals only, + * I hope it's irrelevant now. + * Signal 0 does not exist, so we have signals 1..64, not 0..63. + * In uclibc, kernel and userspace sigset_t is always the same. + * BTW, struct sigaction is also the same on kernel and userspace side. + */ +#if defined(__mips__) +# define _SIGSET_NWORDS (128 / (8 * sizeof (unsigned long))) +#else +# define _SIGSET_NWORDS (64 / (8 * sizeof (unsigned long))) +#endif +typedef struct { + unsigned long __val[_SIGSET_NWORDS]; +} __sigset_t; #endif |