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authorWaldemar Brodkorb <wbx@uclibc-ng.org>2016-05-18 18:41:24 +0200
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2016-05-18 18:41:24 +0200
commit6a8ccc95528f5e86a8770ed15ce89609b5b3dee9 (patch)
treebbd4df35b4d4a6a8b00d7a5e61fb2668b850ad62 /libpthread/linuxthreads/sysdeps/sh/tls.h
parent398a27a5b323956344b4f831d892fed3bd9813c7 (diff)
remove linuxthreads.new, rename linuxthreads.old
Linuxthreads.new isn't really useful with the existence of NPTL/TLS for well supported architectures. There is no reason to use LT.new for ARM/MIPS or other architectures supporting NPTL/TLS. It is not available for noMMU architectures like Blackfin or FR-V. To simplify the live of the few uClibc-ng developers, LT.new is removed and LT.old is renamed to LT. LINUXTHREADS_OLD -> UCLIBC_HAS_LINUXTHREADS
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/sh/tls.h')
-rw-r--r--libpthread/linuxthreads/sysdeps/sh/tls.h140
1 files changed, 49 insertions, 91 deletions
diff --git a/libpthread/linuxthreads/sysdeps/sh/tls.h b/libpthread/linuxthreads/sysdeps/sh/tls.h
index 512e3181e..25bef830f 100644
--- a/libpthread/linuxthreads/sysdeps/sh/tls.h
+++ b/libpthread/linuxthreads/sysdeps/sh/tls.h
@@ -30,129 +30,87 @@
typedef union dtv
{
size_t counter;
- struct
- {
- void *val;
- bool is_static;
- } pointer;
+ void *pointer;
} dtv_t;
-#else /* __ASSEMBLER__ */
-# include <tcb-offsets.h>
-#endif /* __ASSEMBLER__ */
+
+typedef struct
+{
+ void *tcb; /* Pointer to the TCB. Not necessary the
+ thread descriptor used by libpthread. */
+ dtv_t *dtv;
+ void *self; /* Pointer to the thread descriptor. */
+} tcbhead_t;
/* We can support TLS only if the floating-stack support is available. */
-#if defined HAVE_TLS_SUPPORT \
- && (defined FLOATING_STACKS || !defined IS_IN_libpthread)
+#if defined FLOATING_STACKS && defined HAVE_TLS_SUPPORT
-/* Signal that TLS support is available. */
-# define USE_TLS 1
+/* Get system call information. */
+# include <sysdep.h>
-/* Include padding in _pthread_descr_struct so that libc can find p_errno,
- if libpthread will only include the padding because of the !IS_IN_libpthread
- check. */
-#ifndef FLOATING_STACKS
-# define INCLUDE_TLS_PADDING 1
-#endif
+/* Signal that TLS support is available. */
+//# define USE_TLS 1
-# ifndef __ASSEMBLER__
-typedef struct
-{
- dtv_t *dtv;
- void *private;
-} tcbhead_t;
+/* Get the thread descriptor definition. */
+# include <linuxthreads/descr.h>
/* This is the size of the initial TCB. */
-# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
+# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
/* Alignment requirements for the initial TCB. */
-# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)
+# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)
/* This is the size of the TCB. */
-# define TLS_TCB_SIZE sizeof (tcbhead_t)
-
-/* This is the size we need before TCB. */
-# define TLS_PRE_TCB_SIZE sizeof (struct _pthread_descr_struct)
+# define TLS_TCB_SIZE sizeof (struct _pthread_descr_struct)
/* Alignment requirements for the TCB. */
-# define TLS_TCB_ALIGN __alignof__ (struct _pthread_descr_struct)
+# define TLS_TCB_ALIGN __alignof__ (struct _pthread_descr_struct)
/* The TLS blocks start right after the TCB. */
-# define TLS_DTV_AT_TP 1
+# define TLS_DTV_AT_TP 1
+
/* Install the dtv pointer. The pointer passed is to the element with
index -1 which contain the length. */
-# define INSTALL_DTV(tcbp, dtvp) \
- ((tcbhead_t *) (tcbp))->dtv = dtvp + 1
+# define INSTALL_DTV(descr, dtvp) \
+ ((tcbhead_t *) (descr))->dtv = dtvp + 1
/* Install new dtv for current thread. */
-# define INSTALL_NEW_DTV(dtv) \
- ({ tcbhead_t *__tcbp; \
- __asm__ __volatile__ ("stc gbr,%0" : "=r" (__tcbp)); \
- __tcbp->dtv = (dtv);})
+# define INSTALL_NEW_DTV(dtv) \
+ ({ struct _pthread_descr_struct *__descr; \
+ THREAD_SETMEM (__descr, p_header.data.dtvp, (dtv)); })
/* Return dtv of given thread descriptor. */
-# define GET_DTV(tcbp) \
- (((tcbhead_t *) (tcbp))->dtv)
+# define GET_DTV(descr) \
+ (((tcbhead_t *) (descr))->dtv)
/* Code to initially initialize the thread pointer. This might need
special attention since 'errno' is not yet available and if the
operation can cause a failure 'errno' must not be touched. */
-# define TLS_INIT_TP(tcbp, secondcall) \
- ({ __asm__ __volatile__ ("ldc %0,gbr" : : "r" (tcbp)); 0; })
-
-/* Return the address of the dtv for the current thread. */
-# define THREAD_DTV() \
- ({ tcbhead_t *__tcbp; \
- __asm__ __volatile__ ("stc gbr,%0" : "=r" (__tcbp)); \
- __tcbp->dtv;})
+# define TLS_INIT_TP(descr, secondcall) \
+ ({ \
+ void *_descr = (descr); \
+ int result; \
+ tcbhead_t *head = _descr; \
+ \
+ head->tcb = _descr; \
+ /* For now the thread descriptor is at the same address. */ \
+ head->self = _descr; \
+ \
+ __asm__ ("ldc %0,gbr" : : "r" (_descr)); \
+ \
+ 0; \
+ })
-/* Return the thread descriptor for the current thread. */
-# undef THREAD_SELF
-# define THREAD_SELF \
- ({ struct _pthread_descr_struct *__self; \
- __asm__ ("stc gbr,%0" : "=r" (__self)); \
- __self - 1;})
-# undef INIT_THREAD_SELF
-# define INIT_THREAD_SELF(descr, nr) \
- ({ struct _pthread_descr_struct *__self = (void *) descr; \
- __asm__ __volatile__ ("ldc %0,gbr" : : "r" (__self + 1)); \
- 0; })
-
-# define TLS_MULTIPLE_THREADS_IN_TCB 1
-
-/* Get the thread descriptor definition. This must be after the
- the definition of THREAD_SELF for TLS. */
-# include <linuxthreads/descr.h>
-
-# endif /* __ASSEMBLER__ */
-
-#else
-
-# ifndef __ASSEMBLER__
-
-typedef struct
-{
- void *tcb;
- dtv_t *dtv;
- void *self;
- int multiple_threads;
-} tcbhead_t;
-
-/* Get the thread descriptor definition. */
-# include <linuxthreads/descr.h>
-
-# define NONTLS_INIT_TP \
- do { \
- static const tcbhead_t nontls_init_tp = { .multiple_threads = 0 }; \
- __asm__ __volatile__ ("ldc %0,gbr" : : "r" (&nontls_init_tp)); \
- } while (0)
-
-# endif /* __ASSEMBLER__ */
+/* Return the address of the dtv for the current thread. */
+# define THREAD_DTV() \
+ ({ struct _pthread_descr_struct *__descr; \
+ THREAD_GETMEM (__descr, p_header.data.dtvp); })
-#endif /* HAVE_TLS_SUPPORT && (FLOATING_STACKS || !IS_IN_libpthread) */
+#endif /* FLOATING_STACKS && HAVE_TLS_SUPPORT */
+#endif /* __ASSEMBLER__ */
#endif /* tls.h */