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remove __SYSCALL_SSLEN arch macro in favor of using public _NSIG

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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.
This commit is contained in:
Rich Felker
2013-03-26 23:07:31 -04:00
parent 00f1521fdd
commit ccc7b4c3a1
21 changed files with 27 additions and 35 deletions
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4
src/thread/synccall.c
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@ -62,7 +62,7 @@ void __synccall(void (*func)(void *), void *ctx)
__inhibit_ptc();
__syscall(SYS_rt_sigprocmask, SIG_BLOCK, SIGALL_SET,
&oldmask, __SYSCALL_SSLEN);
&oldmask, _NSIG/8);
sem_init(&chaindone, 0, 0);
sem_init(&chainlock, 0, 1);
@ -95,7 +95,7 @@ void __synccall(void (*func)(void *), void *ctx)
__libc_sigaction(SIGSYNCCALL, &sa, 0);
__syscall(SYS_rt_sigprocmask, SIG_SETMASK,
&oldmask, 0, __SYSCALL_SSLEN);
&oldmask, 0, _NSIG/8);
__release_ptc();
}