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2002-02-07  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/generic/dl-tls.c (_dl_determine_tlsoffset): Account for
	alignment of the TCB and store total size and alignment of static
	TLS block in _dl_tls_static_size and _dl_tls_static_align.
	tls_index is a typedef.
	* sysdeps/generic/ldsodefs.h: Declare _dl_tls_static_size and
	_dl_tls_static_align.
	* sysdeps/i386/dl-tls.h: tls_index is a typedef.
	* elf/dl-support.c: Define _dl_tls_static_size and
	_dl_tls_static_align.
This commit is contained in:
Ulrich Drepper
2002-02-07 08:44:37 +00:00
parent 8d4b5a8a50
commit cd30b01ee9
9 changed files with 136 additions and 75 deletions
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11
linuxthreads/ChangeLog
View File

@@ -1,3 +1,14 @@
2002-02-07 Ulrich Drepper <drepper@redhat.com>
* internals.h: Move declarations/definitions of
__pthread_initial_thread_bos, __pthread_initial_thread,
__pthread_manager_thread_bos, __pthread_manager_thread_tos,
__pthread_manager_thread, __pthread_nonstandard_stacks, STACK_SIZE,
CURRENT_STACK_FRAME, __pthread_find_self, and thread_self...
* descr.h: ...here.
* sysdeps/i386/tls.h: Add TLS definitions also for !FLOATING_STACKS.
Define THREAD_GETMEM accordingly.
2002-02-06 Ulrich Drepper <drepper@redhat.com>
* sysdeps/i386/tls.h: Include <stddef.h> for size_t.

67
linuxthreads/descr.h
View File

@@ -165,4 +165,71 @@ struct _pthread_descr_struct {
32 bytes might give better cache
utilization. */
/* Limit between the stack of the initial thread (above) and the
stacks of other threads (below). Aligned on a STACK_SIZE boundary.
Initially 0, meaning that the current thread is (by definition)
the initial thread. */
extern char *__pthread_initial_thread_bos;
/* Descriptor of the initial thread */
extern struct _pthread_descr_struct __pthread_initial_thread;
/* Limits of the thread manager stack. */
extern char *__pthread_manager_thread_bos;
extern char *__pthread_manager_thread_tos;
/* Descriptor of the manager thread */
extern struct _pthread_descr_struct __pthread_manager_thread;
/* Indicate whether at least one thread has a user-defined stack (if 1),
or all threads have stacks supplied by LinuxThreads (if 0). */
extern int __pthread_nonstandard_stacks;
/* The max size of the thread stack segments. If the default
THREAD_SELF implementation is used, this must be a power of two and
a multiple of PAGE_SIZE. */
#ifndef STACK_SIZE
#define STACK_SIZE (2 * 1024 * 1024)
#endif
/* Get some notion of the current stack. Need not be exactly the top
of the stack, just something somewhere in the current frame. */
#ifndef CURRENT_STACK_FRAME
#define CURRENT_STACK_FRAME ({ char __csf; &__csf; })
#endif
/* Recover thread descriptor for the current thread */
extern pthread_descr __pthread_find_self (void) __attribute__ ((const));
static inline pthread_descr thread_self (void) __attribute__ ((const));
static inline pthread_descr thread_self (void)
{
#ifdef THREAD_SELF
return THREAD_SELF;
#else
char *sp = CURRENT_STACK_FRAME;
if (sp >= __pthread_initial_thread_bos)
return &__pthread_initial_thread;
else if (sp >= __pthread_manager_thread_bos
&& sp < __pthread_manager_thread_tos)
return &__pthread_manager_thread;
else if (__pthread_nonstandard_stacks)
return __pthread_find_self();
else
#ifdef _STACK_GROWS_DOWN
return (pthread_descr)(((unsigned long)sp | (STACK_SIZE-1))+1) - 1;
#else
return (pthread_descr)((unsigned long)sp &~ (STACK_SIZE-1));
#endif
#endif
}
#endif /* descr.h */

65
linuxthreads/internals.h
View File

@@ -110,30 +110,10 @@ extern int __pthread_sig_debug;
extern struct pthread_handle_struct __pthread_handles[PTHREAD_THREADS_MAX];
/* Descriptor of the initial thread */
extern struct _pthread_descr_struct __pthread_initial_thread;
/* Descriptor of the manager thread */
extern struct _pthread_descr_struct __pthread_manager_thread;
/* Descriptor of the main thread */
extern pthread_descr __pthread_main_thread;
/* Limit between the stack of the initial thread (above) and the
stacks of other threads (below). Aligned on a STACK_SIZE boundary.
Initially 0, meaning that the current thread is (by definition)
the initial thread. */
extern char *__pthread_initial_thread_bos;
/* Indicate whether at least one thread has a user-defined stack (if 1),
or all threads have stacks supplied by LinuxThreads (if 0). */
extern int __pthread_nonstandard_stacks;
/* File descriptor for sending requests to the thread manager.
Initially -1, meaning that __pthread_initialize_manager must be called. */
@@ -143,11 +123,6 @@ extern int __pthread_manager_request;
extern int __pthread_manager_reader;
/* Limits of the thread manager stack. */
extern char *__pthread_manager_thread_bos;
extern char *__pthread_manager_thread_tos;
#ifdef FLOATING_STACKS
/* Maximum stack size. */
extern size_t __pthread_max_stacksize;
@@ -202,13 +177,6 @@ static inline int nonexisting_handle(pthread_handle h, pthread_t id)
#define PAGE_SIZE (sysconf (_SC_PAGE_SIZE))
#endif
/* The max size of the thread stack segments. If the default
THREAD_SELF implementation is used, this must be a power of two and
a multiple of PAGE_SIZE. */
#ifndef STACK_SIZE
#define STACK_SIZE (2 * 1024 * 1024)
#endif
/* The initial size of the thread stack. Must be a multiple of PAGE_SIZE. */
#ifndef INITIAL_STACK_SIZE
#define INITIAL_STACK_SIZE (4 * PAGE_SIZE)
@@ -227,39 +195,6 @@ static inline int nonexisting_handle(pthread_handle h, pthread_t id)
#define THREAD_STACK_START_ADDRESS __pthread_initial_thread_bos
#endif
/* Get some notion of the current stack. Need not be exactly the top
of the stack, just something somewhere in the current frame. */
#ifndef CURRENT_STACK_FRAME
#define CURRENT_STACK_FRAME ({ char __csf; &__csf; })
#endif
/* Recover thread descriptor for the current thread */
extern pthread_descr __pthread_find_self (void) __attribute__ ((const));
static inline pthread_descr thread_self (void) __attribute__ ((const));
static inline pthread_descr thread_self (void)
{
#ifdef THREAD_SELF
return THREAD_SELF;
#else
char *sp = CURRENT_STACK_FRAME;
if (sp >= __pthread_initial_thread_bos)
return &__pthread_initial_thread;
else if (sp >= __pthread_manager_thread_bos
&& sp < __pthread_manager_thread_tos)
return &__pthread_manager_thread;
else if (__pthread_nonstandard_stacks)
return __pthread_find_self();
else
#ifdef _STACK_GROWS_DOWN
return (pthread_descr)(((unsigned long)sp | (STACK_SIZE-1))+1) - 1;
#else
return (pthread_descr)((unsigned long)sp &~ (STACK_SIZE-1));
#endif
#endif
}
/* If MEMORY_BARRIER isn't defined in pt-machine.h, assume the architecture
doesn't need a memory barrier instruction (e.g. Intel x86). Some
architectures distinguish between full, read and write barriers. */

13
linuxthreads/sysdeps/i386/tls.h
View File

@@ -42,7 +42,7 @@ typedef struct
/* We can support TLS only if the floating-stack support is available. */
#if FLOATING_STACKS && defined HAVE_TLS_SUPPORT
#ifdef HAVE_TLS_SUPPORT
/* Get system call information. */
# include <sysdep.h>
@@ -94,11 +94,16 @@ typedef struct
/* Return the address of the dtv for the current thread. */
# define THREAD_DTV() \
# if FLOATING_STACKS
# define THREAD_DTV() \
({ struct _pthread_descr_struct *__descr; \
THREAD_GETMEM (__descr, p_header.data.dtvp); })
# else
# define THREAD_DTV() \
({ struct _pthread_descr_struct *__descr = thread_self (); \
THREAD_GETMEM (__descr, p_header.data.dtvp); })
# endif
#endif
#endif /* HAVE_TLS_SUPPORT */
#endif /* tls.h */