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* sysdeps/unix/sysv/linux/x86_64/bits/mman.h: Define MAP_STACK.

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* sysdeps/unix/sysv/linux/i386/bits/mman.h: Likewise.
This commit is contained in:
Ulrich Drepper
2008-08-15 22:35:53 +00:00
parent 62a1ffc6fa
commit 965805e888
6 changed files with 24 additions and 24 deletions
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22
nptl/allocatestack.c
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@ -84,10 +84,10 @@
#endif
/* Let the architecture add some flags to the mmap() call used to
allocate stacks. */
#ifndef ARCH_MAP_FLAGS
# define ARCH_MAP_FLAGS 0
/* Newer kernels have the MAP_STACK flag to indicate a mapping is used for
a stack. Use it when possible. */
#ifndef MAP_STACK
# define MAP_STACK 0
#endif
/* This yields the pointer that TLS support code calls the thread pointer. */
@ -454,20 +454,14 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp,
#endif
mem = mmap (NULL, size, prot,
MAP_PRIVATE | MAP_ANONYMOUS | ARCH_MAP_FLAGS, -1, 0);
MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0);
if (__builtin_expect (mem == MAP_FAILED, 0))
{
#ifdef ARCH_RETRY_MMAP
mem = ARCH_RETRY_MMAP (size, prot);
if (__builtin_expect (mem == MAP_FAILED, 0))
#endif
{
if (errno == ENOMEM)
errno = EAGAIN;
if (errno == ENOMEM)
__set_errno (EAGAIN);
return errno;
}
return errno;
}
/* SIZE is guaranteed to be greater than zero.