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| author | Ulrich Drepper <drepper@redhat.com> | 2008-01-10 18:34:43 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2008-01-10 18:34:43 +0000 |
| commit | ab355d9aa5186937757b20b93f7d52ea3926427a (patch) | |
| tree | 202797696b5ede624ce3e0bfeb14e39dc4d5dc5f /nptl/sysdeps/unix/sysv/linux/i386/i486/sem_post.S | |
| parent | f6bacb8ef4dfcee39864d6383e3660d8ac267d23 (diff) | |
| download | glibc-ab355d9aa5186937757b20b93f7d52ea3926427a.tar.gz glibc-ab355d9aa5186937757b20b93f7d52ea3926427a.tar.xz glibc-ab355d9aa5186937757b20b93f7d52ea3926427a.zip | |
* pthread-errnos.sym: Add EOVERFLOW.
* sysdeps/unix/sysv/linux/structsem.sym: Add SEM_VALUE_MAX. * sysdeps/unix/sysv/linux/sem_post.c: Don't overflow value field. * sysdeps/unix/sysv/linux/i386/i486/sem_post.S: Likewise. * sysdeps/unix/sysv/linux/x86_64/sem_post.S: Likewise.
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/i386/i486/sem_post.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/i486/sem_post.S | 41 |
1 files changed, 38 insertions, 3 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_post.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_post.S index ac045b6e34..2edcdde4f0 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_post.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_post.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2005, 2007 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2005, 2007, 2008 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -34,12 +34,21 @@ __new_sem_post: movl 8(%esp), %ebx +#if VALUE == 0 + movl (%ebx), %eax +#else + movl VALUE(%ebx), %eax +#endif +0: cmpl $SEM_VALUE_MAX, %eax + je 3f + leal 1(%eax), %edx LOCK #if VALUE == 0 - addl $1, (%ebx) + cmpxchgl %edx, (%ebx) #else - addl $1, VALUE(%ebx) + cmpxchgl %edx, VALUE(%ebx) #endif + jnz 0b cmpl $0, NWAITERS(%ebx) je 2f @@ -82,6 +91,32 @@ __new_sem_post: orl $-1, %eax popl %ebx ret + +3: +#ifdef PIC + call __i686.get_pc_thunk.bx +#else + movl $5f, %ebx +5: +#endif + addl $_GLOBAL_OFFSET_TABLE_, %ebx +#if USE___THREAD +# ifdef NO_TLS_DIRECT_SEG_REFS + movl errno@gotntpoff(%ebx), %edx + addl %gs:0, %edx + movl $EOVERFLOW, (%edx) +# else + movl errno@gotntpoff(%ebx), %edx + movl $EOVERFLOW, %gs:(%edx) +# endif +#else + call __errno_location@plt + movl $EOVERFLOW, (%eax) +#endif + + orl $-1, %eax + popl %ebx + ret .size __new_sem_post,.-__new_sem_post versioned_symbol(libpthread, __new_sem_post, sem_post, GLIBC_2_1) #if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1) |