ccc7b4c3a1
the issue at hand is that many syscalls require as an argument the kernel-ABI size of sigset_t, intended to allow the kernel to switch to a larger sigset_t in the future. previously, each arch was defining this size in syscall_arch.h, which was redundant with the definition of _NSIG in bits/signal.h. as it's used in some not-quite-portable application code as well, _NSIG is much more likely to be recognized and understood immediately by someone reading the code, and it's also shorter and less cluttered. note that _NSIG is actually 65/129, not 64/128, but the division takes care of throwing away the off-by-one part.
20 lines
484 B
C
20 lines
484 B
C
#include <signal.h>
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#include <errno.h>
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#include <pthread.h>
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#include "syscall.h"
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int pthread_sigmask(int how, const sigset_t *restrict set, sigset_t *restrict old)
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{
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int ret;
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if ((unsigned)how - SIG_BLOCK > 2U) return EINVAL;
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ret = -__syscall(SYS_rt_sigprocmask, how, set, old, _NSIG/8);
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if (!ret && old) {
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if (sizeof old->__bits[0] == 8) {
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old->__bits[0] &= ~0x380000000ULL;
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} else {
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old->__bits[0] &= ~0x80000000UL;
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old->__bits[1] &= ~0x3UL;
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}
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}
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return ret;
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}
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