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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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5
ChangeLog
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@ -1,3 +1,8 @@
2008-08-15 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/x86_64/bits/mman.h: Define MAP_STACK.
* sysdeps/unix/sysv/linux/i386/bits/mman.h: Likewise.
2008-08-14 Ulrich Drepper <drepper@redhat.com> 2008-08-14 Ulrich Drepper <drepper@redhat.com>
* sysdeps/x86_64/memset.S: Reduce size of tables for PIC. * sysdeps/x86_64/memset.S: Reduce size of tables for PIC.

9
nptl/ChangeLog
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@ -1,3 +1,12 @@
2008-08-15 Ulrich Drepper <drepper@redhat.com>
* sysdeps/x86_64/pthreaddef.h: Remove ARCH_MAP_FLAGS and
ARCH_RETRY_MMAP definitions.
* allocatestack.c: Remove definition of ARCH_MAP_FLAGS.
Define MAP_STACK when not defined.
(allocate_stack): Use MAP_STACK instead of ARCH_MAP_FLAGS. Remove
handling of ARCH_RETRY_MMAP.
2008-07-30 Ulrich Drepper <drepper@redhat.com> 2008-07-30 Ulrich Drepper <drepper@redhat.com>
* tst-align2.c (f): Print message that f is reached. * tst-align2.c (f): Print message that f is reached.

18
nptl/allocatestack.c
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@ -84,10 +84,10 @@
#endif #endif
/* Let the architecture add some flags to the mmap() call used to /* Newer kernels have the MAP_STACK flag to indicate a mapping is used for
allocate stacks. */ a stack. Use it when possible. */
#ifndef ARCH_MAP_FLAGS #ifndef MAP_STACK
# define ARCH_MAP_FLAGS 0 # define MAP_STACK 0
#endif #endif
/* This yields the pointer that TLS support code calls the thread pointer. */ /* This yields the pointer that TLS support code calls the thread pointer. */
@ -454,21 +454,15 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp,
#endif #endif
mem = mmap (NULL, size, prot, 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)) 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) if (errno == ENOMEM)
errno = EAGAIN; __set_errno (EAGAIN);
return errno; return errno;
} }
}
/* SIZE is guaranteed to be greater than zero. /* SIZE is guaranteed to be greater than zero.
So we can never get a null pointer back from mmap. */ So we can never get a null pointer back from mmap. */

10
nptl/sysdeps/x86_64/pthreaddef.h
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@ -36,16 +36,6 @@
({ char *frame; asm ("movq %%rsp, %0" : "=r" (frame)); frame; }) ({ char *frame; asm ("movq %%rsp, %0" : "=r" (frame)); frame; })
/* We prefer to have the stack allocated in the low 4GB since this
allows faster context switches. */
#define ARCH_MAP_FLAGS MAP_32BIT
/* If it is not possible to allocate memory there retry without that
flag. */
#define ARCH_RETRY_MMAP(size, prot) \
mmap (NULL, size, prot, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0)
/* XXX Until we have a better place keep the definitions here. */ /* XXX Until we have a better place keep the definitions here. */
/* While there is no such syscall. */ /* While there is no such syscall. */

1
sysdeps/unix/sysv/linux/i386/bits/mman.h
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@ -63,6 +63,7 @@
# define MAP_NORESERVE 0x04000 /* Don't check for reservations. */ # define MAP_NORESERVE 0x04000 /* Don't check for reservations. */
# define MAP_POPULATE 0x08000 /* Populate (prefault) pagetables. */ # define MAP_POPULATE 0x08000 /* Populate (prefault) pagetables. */
# define MAP_NONBLOCK 0x10000 /* Do not block on IO. */ # define MAP_NONBLOCK 0x10000 /* Do not block on IO. */
# define MAP_STACK 0x20000 /* Allocation is for a stack. */
#endif #endif
/* Flags to `msync'. */ /* Flags to `msync'. */

1
sysdeps/unix/sysv/linux/x86_64/bits/mman.h
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@ -64,6 +64,7 @@
# define MAP_NORESERVE 0x04000 /* Don't check for reservations. */ # define MAP_NORESERVE 0x04000 /* Don't check for reservations. */
# define MAP_POPULATE 0x08000 /* Populate (prefault) pagetables. */ # define MAP_POPULATE 0x08000 /* Populate (prefault) pagetables. */
# define MAP_NONBLOCK 0x10000 /* Do not block on IO. */ # define MAP_NONBLOCK 0x10000 /* Do not block on IO. */
# define MAP_STACK 0x20000 /* Allocation is for a stack. */
#endif #endif
/* Flags to `msync'. */ /* Flags to `msync'. */