path: root/src/thread/synccall.c
diff options
authorRich Felker <>2013-03-26 23:07:31 -0400
committerRich Felker <>2013-03-26 23:07:31 -0400
commitccc7b4c3a17ade90de71e1e0f44deebbffd646e6 (patch)
treef2ebd7203d59fdcd3301136924e628b94917e2e5 /src/thread/synccall.c
parent00f1521fdd3f57c7a190550426537089fc24b9da (diff)
remove __SYSCALL_SSLEN arch macro in favor of using public _NSIG
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.
Diffstat (limited to 'src/thread/synccall.c')
1 files changed, 2 insertions, 2 deletions
diff --git a/src/thread/synccall.c b/src/thread/synccall.c
index dc59863f..8c825ace 100644
--- a/src/thread/synccall.c
+++ b/src/thread/synccall.c
@@ -62,7 +62,7 @@ void __synccall(void (*func)(void *), void *ctx)
__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);