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Always initialize thread local storage

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We had previously not enabled TLS in MODE=tiny in order to keep the
smallest example programs (e.g. life.com) just 16kb in size. But it
was error prone doing that, so now we just always enable it because
this change uses hacks to ensure it won't increase life.com's size.

This change also fixes a bug on NetBSD, where signal handlers would
break thread local storage if SA_SIGINFO was being used. This looks
like it might be a bug in NetBSD, but it's got a simple workaround.
This commit is contained in:
Justine Tunney 2022-07-18 22:26:11 -07:00
parent 057e8f5b54
commit 69f4152f38
33 changed files with 174 additions and 123 deletions
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2
libc/sysv/syscalls.sh
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@ -48,7 +48,7 @@ scall __sys_mmap 0x0c50c51dd20c5009 globl hidden # netbsd+openbsd:pad
scall sys_msync 0x115100041204101a globl hidden
scall sys_mprotect 0x04a04a04a204a00a globl hidden
scall __sys_munmap 0x049049049204900b globl hidden
scall sys_sigaction 0x15402e1a0202e00d globl hidden # rt_sigaction on Lunix; it's complicated on NetBSD
scall sys_sigaction 0x15402e1a0202e00d globl hidden # rt_sigaction on Lunix; __sigaction_sigtramp() on NetBSD
scall __sys_sigprocmask 0x125030154214900e globl hidden # a.k.a. rt_sigprocmask, openbsd:byvalue, a.k.a. pthread_sigmask
scall sys_ioctl 0x0360360362036010 globl hidden
scall sys_pread 0x0ad0ad1db2099011 globl hidden # a.k.a. pread64; netbsd+openbsd:pad