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| author | Jani Monoses <jani.monoses@canonical.com> | 2011-03-09 10:06:16 +0100 |
|---|---|---|
| committer | Bjoern Michaelsen <bjoern.michaelsen@canonical.com> | 2011-03-09 10:06:16 +0100 |
| commit | 11db8cce4928a6510341d97bb28d100068037987 (patch) | |
| tree | 15ca7069c1408b05311cecb6d9fef2ed9994544b /sal/osl/unx/interlck.c | |
| parent | aa4a5a276b3e694b7d73c57b23f3a331d2d14bfe (diff) | |
lp#726529: using the Linaro gcc 4.5 generated code instead
* this adds memory barriers to the asm code block making it SMP-safe
Diffstat (limited to 'sal/osl/unx/interlck.c')
| -rw-r--r-- | sal/osl/unx/interlck.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/sal/osl/unx/interlck.c b/sal/osl/unx/interlck.c index 7cf09b902cd9..826592a495a6 100644 --- a/sal/osl/unx/interlck.c +++ b/sal/osl/unx/interlck.c @@ -40,6 +40,8 @@ #elif defined ( ARM ) && (( __GNUC__ < 4 ) || (( __GNUC__ == 4) && ( __GNUC_MINOR__ < 6 ))) && ( __ARM_ARCH__ >= 6) // assembler implementation for gcc <4.6 on arm // originally contributed by Eric Bachard / OOo4Kids +// replaced with the asm code generated by Linaro gcc 4.5 +// which includes memory barriers to make it SMP-safe // #i117017# and lp#726529 oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount) { @@ -47,11 +49,13 @@ oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* int nResult; __asm__ __volatile__ ( +" dmb\n" "1: ldrex %0, [%3]\n" " add %0, %0, #1\n" " strex %1, %0, [%3]\n" " teq %1, #0\n" -" bne 1b" +" bne 1b\n" +" dmb\n" : "=&r" (nCount), "=&r" (nResult), "=m" (*pCount) : "r" (pCount) : "memory"); @@ -65,11 +69,13 @@ oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* int nResult; __asm__ __volatile__ ( +" dmb\n" "0: ldrex %0, [%3]\n" " sub %0, %0, #1\n" " strex %1, %0, [%3]\n" " teq %1, #0\n" -" bne 0b" +" bne 0b\n" +" dmb\n" : "=&r" (nCount), "=&r" (nResult), "=m" (*pCount) : "r" (pCount) : "memory"); |