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2004-09-02 Roland McGrath <roland@redhat.com>

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* sysdeps/mach/hurd/i386/tls.h (TLS_INIT_TP_EXPENSIVE): New macro.
	(INSTALL_NEW_DTV, THREAD_DTV): Rewritten to fetch the right word.
	(THREAD_SELF): New macro.
This commit is contained in:
Roland McGrath 2004-09-02 23:58:23 +00:00
parent f76c849910
commit 0544677016
1 changed files with 15 additions and 4 deletions
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19
sysdeps/mach/hurd/i386/tls.h
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@ -1,5 +1,5 @@
/* Definitions for thread-local data handling. Hurd/i386 version. /* Definitions for thread-local data handling. Hurd/i386 version.
Copyright (C) 2003 Free Software Foundation, Inc. Copyright (C) 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library. This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or The GNU C Library is free software; you can redistribute it and/or
@ -113,14 +113,25 @@ _hurd_tls_init (tcbhead_t *tcb, int secondcall)
operation can cause a failure 'errno' must not be touched. */ operation can cause a failure 'errno' must not be touched. */
# define TLS_INIT_TP(descr, secondcall) \ # define TLS_INIT_TP(descr, secondcall) \
_hurd_tls_init ((tcbhead_t *) (descr), (secondcall)) _hurd_tls_init ((tcbhead_t *) (descr), (secondcall))
# define TLS_INIT_TP_EXPENSIVE 1
/* Return the TCB address of the current thread. */
# define THREAD_SELF \
({ tcbhead_t *__tcb;
__asm__ ("movl %%gs:%c1,%0" : "=r" (__tcb) \
: "i" (offsetof (tcbhead_t, tcb))); \
__tcb;})
/* Install new dtv for current thread. */ /* Install new dtv for current thread. */
# define INSTALL_NEW_DTV(dtv) \ # define INSTALL_NEW_DTV(dtvp) \
({ __asm__ ("movl %0, %%gs:0" : : "r" (dtv)); }) ({ asm volatile ("movl %0,%%gs:%P1"
: : "ir" (dtvp), "i" (offsetof (tcbhead_t, dtv))); })
/* Return the address of the dtv for the current thread. */ /* Return the address of the dtv for the current thread. */
# define THREAD_DTV() \ # define THREAD_DTV() \
({ void *_dtv; __asm__ ("movl %%gs:0, %0" : "=r" (_dtv)); _dtv; }) ({ void *_dtv;
asm ("movl %%gs:%P1,%0" : "=q" (_dtv) : "i" (offsetof (tcbhead_t, dtv)));
_dtv; })
# endif /* !ASSEMBLER */ # endif /* !ASSEMBLER */
#endif /* HAVE_TLS_SUPPORT */ #endif /* HAVE_TLS_SUPPORT */