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Update.
2002-12-04 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/i386/lowlevellock.h: Mark asms as volatile and add memory clobbers to lock operations.
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@ -1,3 +1,8 @@
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2002-12-04 Ulrich Drepper <drepper@redhat.com>
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* sysdeps/unix/sysv/linux/i386/lowlevellock.h: Mark asms as
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volatile and add memory clobbers to lock operations.
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2002-12-03 Ulrich Drepper <drepper@redhat.com>
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* sysdeps/i386/i686/bits/atomic.h: Use i486 version.
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@ -105,7 +105,7 @@ get_cached_stack (size_t *sizep, void **memp)
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{
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struct pthread *curr;
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curr = list_entry(entry, struct pthread, header.data.list);
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curr = list_entry (entry, struct pthread, header.data.list);
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if (FREE_P (curr) && curr->stackblock_size >= size)
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{
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if (curr->stackblock_size == size)
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@ -56,54 +56,59 @@ extern int __lll_mutex_unlock_wait (int *__futex)
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({ unsigned char ret; \
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__asm __volatile (LOCK_INSTR "cmpxchgl %2, %1; setne %0" \
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: "=a" (ret), "=m" (futex) \
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: "r" (1), "1" (futex), "0" (0)); \
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: "r" (1), "1" (futex), "0" (0) \
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: "memory"); \
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ret; })
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#define lll_mutex_lock(futex) \
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(void) ({ int ignore1, ignore2; \
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__asm (LOCK_INSTR "xaddl %0, %2\n\t" \
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"testl %0, %0\n\t" \
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"jne 1f\n\t" \
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".subsection 1\n" \
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"1:\tleal %2, %%ecx\n\t" \
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"call __lll_mutex_lock_wait\n\t" \
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"jmp 2f\n\t" \
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".previous\n" \
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"2:" \
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: "=a" (ignore1), "=&c" (ignore2), "=m" (futex) \
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: "0" (1), "2" (futex)); })
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__asm __volatile (LOCK_INSTR "xaddl %0, %2\n\t" \
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"testl %0, %0\n\t" \
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"jne 1f\n\t" \
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".subsection 1\n" \
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"1:\tleal %2, %%ecx\n\t" \
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"call __lll_mutex_lock_wait\n\t" \
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"jmp 2f\n\t" \
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".previous\n" \
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"2:" \
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: "=a" (ignore1), "=&c" (ignore2), "=m" (futex) \
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: "0" (1), "2" (futex) \
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: "memory"); })
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#define lll_mutex_timedlock(futex, timeout) \
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({ int result, ignore1, ignore2; \
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__asm (LOCK_INSTR "xaddl %0, %3\n\t" \
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"testl %0, %0\n\t" \
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"jne 1f\n\t" \
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".subsection 1\n" \
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"1:\tleal %3, %%ecx\n\t" \
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"movl %6, %%edx\n\t" \
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"call __lll_mutex_timedlock_wait\n\t" \
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"jmp 2f\n\t" \
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".previous\n" \
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"2:" \
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: "=a" (result), "=&c" (ignore1), "=&d" (ignore2), "=m" (futex) \
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: "0" (1), "3" (futex), "m" (timeout)); \
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__asm __volatile (LOCK_INSTR "xaddl %0, %3\n\t" \
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"testl %0, %0\n\t" \
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"jne 1f\n\t" \
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".subsection 1\n" \
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"1:\tleal %3, %%ecx\n\t" \
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"movl %6, %%edx\n\t" \
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"call __lll_mutex_timedlock_wait\n\t" \
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"jmp 2f\n\t" \
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".previous\n" \
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"2:" \
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: "=a" (result), "=&c" (ignore1), "=&d" (ignore2), \
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"=m" (futex) \
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: "0" (1), "3" (futex), "m" (timeout) \
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: "memory"); \
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result; })
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#define lll_mutex_unlock(futex) \
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(void) ({ int ignore; \
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__asm (LOCK_INSTR "decl %0\n\t" \
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"jne 1f\n\t" \
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".subsection 1\n" \
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"1:\tleal %0, %%eax\n\t" \
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"call __lll_mutex_unlock_wake\n\t" \
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"jmp 2f\n\t" \
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".previous\n" \
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"2:" \
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: "=m" (futex), "=&a" (ignore) \
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: "0" (futex)); })
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__asm __volatile (LOCK_INSTR "decl %0\n\t" \
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"jne 1f\n\t" \
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".subsection 1\n" \
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"1:\tleal %0, %%eax\n\t" \
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"call __lll_mutex_unlock_wake\n\t" \
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"jmp 2f\n\t" \
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".previous\n" \
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"2:" \
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: "=m" (futex), "=&a" (ignore) \
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: "0" (futex) \
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: "memory"); })
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#define lll_mutex_islocked(futex) \
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@ -138,36 +143,39 @@ extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
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({ unsigned char ret; \
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__asm __volatile (LOCK_INSTR "cmpxchgl %2, %1; setne %0" \
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: "=a" (ret), "=m" (futex) \
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: "r" (0), "1" (futex), "0" (1)); \
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: "r" (0), "1" (futex), "0" (1) \
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: "memory"); \
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ret; })
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#define lll_lock(futex) \
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(void) ({ int ignore1, ignore2; \
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__asm (LOCK_INSTR "xaddl %0, %2\n\t" \
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"jne 1f\n\t" \
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".subsection 1\n" \
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"1:\tleal %2, %%ecx\n\t" \
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"call __lll_lock_wait\n\t" \
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"jmp 2f\n\t" \
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".previous\n" \
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"2:" \
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: "=a" (ignore1), "=&c" (ignore2), "=m" (futex) \
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: "0" (-1), "2" (futex)); })
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__asm __volatile (LOCK_INSTR "xaddl %0, %2\n\t" \
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"jne 1f\n\t" \
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".subsection 1\n" \
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"1:\tleal %2, %%ecx\n\t" \
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"call __lll_lock_wait\n\t" \
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"jmp 2f\n\t" \
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".previous\n" \
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"2:" \
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: "=a" (ignore1), "=&c" (ignore2), "=m" (futex) \
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: "0" (-1), "2" (futex) \
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: "memory"); })
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#define lll_unlock(futex) \
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(void) ({ int ignore; \
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__asm (LOCK_INSTR "incl %0\n\t" \
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"jng 1f\n\t" \
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".subsection 1\n" \
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"1:\tleal %0, %%eax\n\t" \
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"call __lll_unlock_wake\n\t" \
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"jmp 2f\n\t" \
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".previous\n" \
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"2:" \
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: "=m" (futex), "=&a" (ignore) \
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: "0" (futex)); })
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__asm __volatile (LOCK_INSTR "incl %0\n\t" \
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"jng 1f\n\t" \
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".subsection 1\n" \
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"1:\tleal %0, %%eax\n\t" \
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"call __lll_unlock_wake\n\t" \
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"jmp 2f\n\t" \
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".previous\n" \
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"2:" \
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: "=m" (futex), "=&a" (ignore) \
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: "0" (futex) \
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: "memory"); })
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#define lll_islocked(futex) \
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