diff options
| -rw-r--r-- | ChangeLog | 9 | ||||
| -rw-r--r-- | NEWS | 2 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/hppa/bits/atomic.h | 35 |
3 files changed, 27 insertions, 19 deletions
diff --git a/ChangeLog b/ChangeLog index c2c0881f4e..414bd4e44f 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,12 @@ +2015-08-08 John David Anglin <danglin@gcc.gnu.org> + + [BZ #18787] + * sysdeps/unix/sysv/linux/hppa/bits/atomic.h (_LWS_CLOBBER): Revise + clobber registers. + (atomic_compare_and_exchange_val_acq): Use register asms to assign + operand registers. Use register %r20 for EAGAIN and EDEADLOCK checks. + Cast return to __typeof (oldval). + 2015-08-08 Mike Frysinger <vapier@gentoo.org> * sysdeps/unix/sysv/linux/microblaze/sysdep.h: Wrap the whole file diff --git a/NEWS b/NEWS index bb4a4c24c6..2beb28c8f0 100644 --- a/NEWS +++ b/NEWS @@ -8,7 +8,7 @@ using `glibc' in the "product" field. Version 2.23 * The following bugs are resolved with this release: - 16517, 16519, 18265, 18525, 18618, 18647, 18661. + 16517, 16519, 18265, 18525, 18618, 18647, 18661, 18787. Version 2.22 diff --git a/sysdeps/unix/sysv/linux/hppa/bits/atomic.h b/sysdeps/unix/sysv/linux/hppa/bits/atomic.h index abde83e2f9..6e73504fee 100644 --- a/sysdeps/unix/sysv/linux/hppa/bits/atomic.h +++ b/sysdeps/unix/sysv/linux/hppa/bits/atomic.h @@ -56,42 +56,41 @@ typedef uintmax_t uatomic_max_t; #define _LWS "0xb0" #define _LWS_CAS "0" /* Note r31 is the link register. */ -#define _LWS_CLOBBER "r1", "r26", "r25", "r24", "r23", "r22", "r21", "r20", "r28", "r31", "memory" +#define _LWS_CLOBBER "r1", "r23", "r22", "r20", "r31", "memory" /* String constant for -EAGAIN. */ #define _ASM_EAGAIN "-11" /* String constant for -EDEADLOCK. */ #define _ASM_EDEADLOCK "-45" #if __ASSUME_LWS_CAS -/* The only basic operation needed is compare and exchange. */ +/* The only basic operation needed is compare and exchange. The mem + pointer must be word aligned. */ # define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ ({ \ - volatile int lws_errno; \ - __typeof__ (*mem) lws_ret; \ - asm volatile( \ + register long lws_errno asm("r21"); \ + register unsigned long lws_ret asm("r28"); \ + register unsigned long lws_mem asm("r26") = (unsigned long)(mem); \ + register unsigned long lws_old asm("r25") = (unsigned long)(oldval);\ + register unsigned long lws_new asm("r24") = (unsigned long)(newval);\ + __asm__ __volatile__( \ "0: \n\t" \ - "copy %2, %%r26 \n\t" \ - "copy %3, %%r25 \n\t" \ - "copy %4, %%r24 \n\t" \ "ble " _LWS "(%%sr2, %%r0) \n\t" \ "ldi " _LWS_CAS ", %%r20 \n\t" \ - "ldi " _ASM_EAGAIN ", %%r24 \n\t" \ - "cmpb,=,n %%r24, %%r21, 0b \n\t" \ + "ldi " _ASM_EAGAIN ", %%r20 \n\t" \ + "cmpb,=,n %%r20, %%r21, 0b \n\t" \ "nop \n\t" \ - "ldi " _ASM_EDEADLOCK ", %%r25 \n\t" \ - "cmpb,=,n %%r25, %%r21, 0b \n\t" \ + "ldi " _ASM_EDEADLOCK ", %%r20 \n\t" \ + "cmpb,=,n %%r20, %%r21, 0b \n\t" \ "nop \n\t" \ - "stw %%r28, %0 \n\t" \ - "stw %%r21, %1 \n\t" \ - : "=m" (lws_ret), "=m" (lws_errno) \ - : "r" (mem), "r" (oldval), "r" (newval) \ + : "=r" (lws_ret), "=r" (lws_errno) \ + : "r" (lws_mem), "r" (lws_old), "r" (lws_new) \ : _LWS_CLOBBER \ ); \ \ - if(lws_errno == -EFAULT || lws_errno == -ENOSYS) \ + if (lws_errno == -EFAULT || lws_errno == -ENOSYS) \ ABORT_INSTRUCTION; \ \ - lws_ret; \ + (__typeof (oldval)) lws_ret; \ }) # define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \ |