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authorWaldemar Brodkorb <wbx@openadk.org>2015-02-14 23:04:02 -0600
committerWaldemar Brodkorb <wbx@openadk.org>2015-02-14 23:04:02 -0600
commite1e46622ac0fce73d802fa4a8a2e83cc25cd9e7a (patch)
tree2c8d14e4dcc733f4227f0984ed05da5826b13acd /libpthread/linuxthreads/sysdeps/arm/pt-machine.h
parent6b6ede3d15f04fe825cfa9f697507457e3640344 (diff)
Revert "resolve merge"
This reverts commit 6b6ede3d15f04fe825cfa9f697507457e3640344.
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/arm/pt-machine.h')
-rw-r--r--libpthread/linuxthreads/sysdeps/arm/pt-machine.h69
1 files changed, 6 insertions, 63 deletions
diff --git a/libpthread/linuxthreads/sysdeps/arm/pt-machine.h b/libpthread/linuxthreads/sysdeps/arm/pt-machine.h
index 2b877f980..0a455b97d 100644
--- a/libpthread/linuxthreads/sysdeps/arm/pt-machine.h
+++ b/libpthread/linuxthreads/sysdeps/arm/pt-machine.h
@@ -1,6 +1,6 @@
/* Machine-dependent pthreads configuration and inline functions.
ARM version.
- Copyright (C) 1997, 1998, 2000, 2002 Free Software Foundation, Inc.
+ Copyright (C) 1997, 1998, 2000, 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Philip Blundell <philb@gnu.org>.
@@ -21,86 +21,29 @@
#ifndef _PT_MACHINE_H
#define _PT_MACHINE_H 1
-#include <sys/syscall.h>
-#include <unistd.h>
+#include <features.h>
#ifndef PT_EI
# define PT_EI __extern_always_inline
#endif
-#if defined(__thumb__)
-#if defined(__USE_LDREXSTREX__)
-PT_EI long int ldrex(int *spinlock)
-{
- long int ret;
- __asm__ __volatile__(
- "ldrex %0, [%1]\n"
- : "=r"(ret)
- : "r"(spinlock) : "memory");
- return ret;
-}
-
-PT_EI long int strex(int val, int *spinlock)
-{
- long int ret;
- __asm__ __volatile__(
- "strex %0, %1, [%2]\n"
- : "=r"(ret)
- : "r" (val), "r"(spinlock) : "memory");
- return ret;
-}
-
-/* Spinlock implementation; required. */
-PT_EI long int
-testandset (int *spinlock)
-{
- register unsigned int ret;
-
- do {
- ret = ldrex(spinlock);
- } while (strex(1, spinlock));
-
- return ret;
-}
-
-#else /* __USE_LDREXSTREX__ */
-
/* This will not work on ARM1 or ARM2 because SWP is lacking on those
machines. Unfortunately we have no way to detect this at compile
time; let's hope nobody tries to use one. */
/* Spinlock implementation; required. */
-PT_EI long int testandset (int *spinlock);
-PT_EI long int testandset (int *spinlock)
+PT_EI long int
+testandset (int *spinlock)
{
register unsigned int ret;
- void *pc;
- __asm__ __volatile__(
- ".align 0\n"
- "\tbx pc\n"
- "\tnop\n"
- "\t.arm\n"
- "\tswp %0, %2, [%3]\n"
- "\torr %1, pc, #1\n"
- "\tbx %1\n"
- "\t.force_thumb"
- : "=r"(ret), "=r"(pc)
- : "0"(1), "r"(spinlock));
- return ret;
-}
-#endif
-#else /* __thumb__ */
-PT_EI long int testandset (int *spinlock);
-PT_EI long int testandset (int *spinlock)
-{
- register unsigned int ret;
__asm__ __volatile__("swp %0, %1, [%2]"
: "=r"(ret)
: "0"(1), "r"(spinlock));
+
return ret;
}
-#endif
+
/* Get some notion of the current stack. Need not be exactly the top
of the stack, just something somewhere in the current frame. */