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authorUlrich Drepper <drepper@redhat.com>2001-06-16 18:47:49 +0000
committerUlrich Drepper <drepper@redhat.com>2001-06-16 18:47:49 +0000
commitcc765c2a2e1ab7702080b7fd2f0a7b21d8ac60ff (patch)
tree6f8ce94483cd5a47aebac0c6ced2904ea9670d42 /linuxthreads
parent81dacf8ac44e44187fc0b90b75e28b032a8b14ac (diff)
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Make _STACK_GROWS_UP work.
Diffstat (limited to 'linuxthreads')
-rw-r--r--linuxthreads/attr.c6
-rw-r--r--linuxthreads/internals.h4
-rw-r--r--linuxthreads/manager.c54
-rw-r--r--linuxthreads/pthread.c16
4 files changed, 79 insertions, 1 deletions
diff --git a/linuxthreads/attr.c b/linuxthreads/attr.c
index 2d06025ba4..eba93f1f67 100644
--- a/linuxthreads/attr.c
+++ b/linuxthreads/attr.c
@@ -283,8 +283,12 @@ int pthread_getattr_np (pthread_t thread, pthread_attr_t *attr)
attr->__inheritsched = descr->p_inheritsched;
attr->__scope = PTHREAD_SCOPE_SYSTEM;
+#ifdef _STACK_GROWS_DOWN
attr->__stacksize = (char *)(descr + 1) - (char *)descr->p_guardaddr
- descr->p_guardsize;
+#else
+ attr->__stacksize = (char *)descr->p_guardaddr - (char *)descr;
+#endif
attr->__guardsize = descr->p_guardsize;
attr->__stackaddr_set = descr->p_userstack;
#ifdef NEED_SEPARATE_REGISTER_STACK
@@ -298,7 +302,7 @@ int pthread_getattr_np (pthread_t thread, pthread_attr_t *attr)
#ifndef _STACK_GROWS_UP
attr->__stackaddr = (char *)(descr + 1);
#else
-# error __stackaddr not handled
+ attr->__stackaddr = (char *)descr;
#endif
return 0;
diff --git a/linuxthreads/internals.h b/linuxthreads/internals.h
index aeb45aae01..a78f9b671b 100644
--- a/linuxthreads/internals.h
+++ b/linuxthreads/internals.h
@@ -384,7 +384,11 @@ static inline pthread_descr thread_self (void)
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
}
diff --git a/linuxthreads/manager.c b/linuxthreads/manager.c
index d436b08f16..38596ce957 100644
--- a/linuxthreads/manager.c
+++ b/linuxthreads/manager.c
@@ -32,6 +32,7 @@
#include "spinlock.h"
#include "restart.h"
#include "semaphore.h"
+#include <stackinfo.h>
/* Array of active threads. Entry 0 is reserved for the initial thread. */
struct pthread_handle_struct __pthread_handles[PTHREAD_THREADS_MAX] =
@@ -313,6 +314,13 @@ static int pthread_allocate_stack(const pthread_attr_t *attr,
if (attr != NULL && attr->__stackaddr_set)
{
+#ifdef _STACK_GROWS_UP
+ /* The user provided a stack. */
+ new_thread = (pthread_descr) attr->__stackaddr;
+ new_thread_bottom = (char *) (new_thread + 1);
+ guardaddr = attr->__stackaddr + attr->__stacksize;
+ guardsize = 0;
+#else
/* The user provided a stack. For now we interpret the supplied
address as 1 + the highest addr. in the stack segment. If a
separate register stack is needed, we place it at the low end
@@ -328,6 +336,7 @@ static int pthread_allocate_stack(const pthread_attr_t *attr,
new_thread_bottom = (char *) attr->__stackaddr - attr->__stacksize;
guardaddr = new_thread_bottom;
guardsize = 0;
+#endif
#ifndef THREAD_SELF
__pthread_nonstandard_stacks = 1;
#endif
@@ -423,12 +432,23 @@ static int pthread_allocate_stack(const pthread_attr_t *attr,
/* No more memory available. */
return -1;
+# ifdef _STACK_GROWS_DOWN
guardaddr = map_addr;
if (guardsize > 0)
mprotect (guardaddr, guardsize, PROT_NONE);
new_thread_bottom = (char *) map_addr + guardsize;
new_thread = ((pthread_descr) (new_thread_bottom + stacksize)) - 1;
+# elif _STACK_GROWS_UP
+ guardaddr = map_addr + stacksize;
+ if (guardsize > 0)
+ mprotect (guardaddr, guardsize, PROT_NONE);
+
+ new_thread = (pthread_descr) map_addr;
+ new_thread_bottom = (char *) (new_thread + 1);
+# else
+# error You must define a stack direction
+# endif /* Stack direction */
# else /* !FLOATING_STACKS */
void *res_addr;
@@ -445,6 +465,7 @@ static int pthread_allocate_stack(const pthread_attr_t *attr,
stacksize = STACK_SIZE - granularity;
}
+# ifdef _STACK_GROWS_DOWN
new_thread = default_new_thread;
new_thread_bottom = (char *) (new_thread + 1) - stacksize;
map_addr = new_thread_bottom - guardsize;
@@ -464,6 +485,23 @@ static int pthread_allocate_stack(const pthread_attr_t *attr,
guardaddr = map_addr;
if (guardsize > 0)
mprotect (guardaddr, guardsize, PROT_NONE);
+# else
+ /* The thread description goes at the bottom of this area, and
+ * the stack starts directly above it.
+ */
+ new_thread = (pthread_descr)((unsigned long)default_new_thread &~ (STACK_SIZE - 1));
+ map_addr = mmap(new_thread, stacksize + guardsize,
+ PROT_READ | PROT_WRITE | PROT_EXEC,
+ MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ if (map_addr == MAP_FAILED)
+ return -1;
+
+ new_thread_bottom = map_addr + sizeof(*new_thread);
+ guardaddr = map_addr + stacksize;
+ if (guardsize > 0)
+ mprotect (guardaddr, guardsize, PROT_NONE);
+
+# endif /* stack direction */
# endif
#endif /* !NEED_SEPARATE_REGISTER_STACK */
}
@@ -591,6 +629,10 @@ static int pthread_handle_create(pthread_t *thread, const pthread_attr_t *attr,
(char *)new_thread - new_thread_bottom,
CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
__pthread_sig_cancel, new_thread);
+#elif _STACK_GROWS_UP
+ pid = __clone(pthread_start_thread_event, (void **) new_thread_bottom,
+ CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
+ __pthread_sig_cancel, new_thread);
#else
pid = __clone(pthread_start_thread_event, (void **) new_thread,
CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
@@ -627,6 +669,10 @@ static int pthread_handle_create(pthread_t *thread, const pthread_attr_t *attr,
(char *)new_thread - new_thread_bottom,
CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
__pthread_sig_cancel, new_thread);
+#elif _STACK_GROWS_UP
+ pid = __clone(pthread_start_thread, (void **) new_thread_bottom,
+ CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
+ __pthread_sig_cancel, new_thread);
#else
pid = __clone(pthread_start_thread, (void **) new_thread,
CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
@@ -643,6 +689,9 @@ static int pthread_handle_create(pthread_t *thread, const pthread_attr_t *attr,
- new_thread_bottom);
munmap((caddr_t)new_thread_bottom,
2 * stacksize + new_thread->p_guardsize);
+#elif _STACK_GROWS_UP
+ size_t stacksize = guardaddr - (char *)new_thread;
+ munmap(new_thread, stacksize + guardsize);
#else
size_t stacksize = (char *)(new_thread+1) - new_thread_bottom;
munmap(new_thread_bottom - guardsize, guardsize + stacksize);
@@ -708,6 +757,10 @@ static void pthread_free(pthread_descr th)
size_t guardsize = th->p_guardsize;
/* Free the stack and thread descriptor area */
char *guardaddr = th->p_guardaddr;
+#ifdef _STACK_GROWS_UP
+ size_t stacksize = guardaddr - (char *)th;
+ guardaddr = (char *)th;
+#else
/* Guardaddr is always set, even if guardsize is 0. This allows
us to compute everything else. */
size_t stacksize = (char *)(th+1) - guardaddr - guardsize;
@@ -716,6 +769,7 @@ static void pthread_free(pthread_descr th)
guardaddr -= stacksize;
stacksize *= 2;
#endif
+#endif
/* Unmap the stack. */
munmap(guardaddr, stacksize + guardsize);
}
diff --git a/linuxthreads/pthread.c b/linuxthreads/pthread.c
index ea35c724d9..643e52fea6 100644
--- a/linuxthreads/pthread.c
+++ b/linuxthreads/pthread.c
@@ -30,6 +30,7 @@
#include "internals.h"
#include "spinlock.h"
#include "restart.h"
+#include <stackinfo.h>
/* We need the global/static resolver state here. */
#include <resolv.h>
@@ -412,11 +413,17 @@ static void pthread_initialize(void)
/* Test if compare-and-swap is available */
__pthread_has_cas = compare_and_swap_is_available();
#endif
+#ifdef _STACK_GROWS_UP
+ /* The initial thread already has all the stack it needs */
+ __pthread_initial_thread_bos = (char *)
+ ((long)CURRENT_STACK_FRAME &~ (STACK_SIZE - 1));
+#else
/* For the initial stack, reserve at least STACK_SIZE bytes of stack
below the current stack address, and align that on a
STACK_SIZE boundary. */
__pthread_initial_thread_bos =
(char *)(((long)CURRENT_STACK_FRAME - 2 * STACK_SIZE) & ~(STACK_SIZE - 1));
+#endif
/* Update the descriptor for the initial thread. */
__pthread_initial_thread.p_pid = __getpid();
/* Likewise for the resolver state _res. */
@@ -544,6 +551,11 @@ int __pthread_initialize_manager(void)
THREAD_MANAGER_STACK_SIZE,
CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND,
(void *)(long)manager_pipe[0]);
+#elif _STACK_GROWS_UP
+ pid = __clone(__pthread_manager_event,
+ (void **) __pthread_manager_thread_bos,
+ CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND,
+ (void *)(long)manager_pipe[0]);
#else
pid = __clone(__pthread_manager_event,
(void **) __pthread_manager_thread_tos,
@@ -580,6 +592,10 @@ int __pthread_initialize_manager(void)
THREAD_MANAGER_STACK_SIZE,
CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND,
(void *)(long)manager_pipe[0]);
+#elif _STACK_GROWS_UP
+ pid = __clone(__pthread_manager, (void **) __pthread_manager_thread_bos,
+ CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND,
+ (void *)(long)manager_pipe[0]);
#else
pid = __clone(__pthread_manager, (void **) __pthread_manager_thread_tos,
CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND,