From 73eeb757dad6123971edda029d185e4daa632c91 Mon Sep 17 00:00:00 2001 From: guenther <> Date: Sat, 7 May 2016 19:05:22 +0000 Subject: Use a Thread Information Block in both single and multi-threaded programs. This stores errno, the cancelation flags, and related bits for each thread and is allocated by ld.so or libc.a. This is an ABI break from 5.9-stable! Make libpthread dlopen'able by moving the cancelation wrappers into libc and doing locking and fork/errno handling via callbacks that libpthread registers when it first initializes. 'errno' *must* be declared via now! Clean up libpthread's symbol exports like libc. On powerpc, offset the TIB/TCB/TLS data from the register per the ELF spec. Testing by various, particularly sthen@ and patrick@ ok kettenis@ --- src/lib/libc/include/namespace.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'src/lib/libc/include/namespace.h') diff --git a/src/lib/libc/include/namespace.h b/src/lib/libc/include/namespace.h index 16d524f666..980c1a8dd6 100644 --- a/src/lib/libc/include/namespace.h +++ b/src/lib/libc/include/namespace.h @@ -1,4 +1,4 @@ -/* $OpenBSD: namespace.h,v 1.9 2016/04/05 04:28:32 guenther Exp $ */ +/* $OpenBSD: namespace.h,v 1.10 2016/05/07 19:05:22 guenther Exp $ */ #ifndef _LIBC_NAMESPACE_H_ #define _LIBC_NAMESPACE_H_ @@ -139,12 +139,14 @@ #define CANCEL(x) _libc_##x##_cancel #define WRAP(x) _libc_##x##_wrap #define HIDDEN_STRING(x) "_libc_" __STRING(x) +#define CANCEL_STRING(x) "_libc_" __STRING(x) "_cancel" #define WRAP_STRING(x) "_libc_" __STRING(x) "_wrap" #define PROTO_NORMAL(x) __dso_hidden typeof(x) x asm(HIDDEN_STRING(x)) #define PROTO_STD_DEPRECATED(x) typeof(x) x __attribute__((deprecated)) #define PROTO_DEPRECATED(x) typeof(x) x __attribute__((deprecated, weak)) -#define PROTO_CANCEL(x) PROTO_NORMAL(x), CANCEL(x) +#define PROTO_CANCEL(x) __dso_hidden typeof(x) HIDDEN(x), \ + x asm(CANCEL_STRING(x)) #define PROTO_WRAP(x) PROTO_NORMAL(x), WRAP(x) #define DEF_STRONG(x) __strong_alias(x, HIDDEN(x)) -- cgit v1.2.3-55-g6feb