[uclibc-ng-devel] [PATCH 1/2] ARC: nptl: cancellable wrappers were broken

This was reported as uClicb test suite failures of tst-mqueue3, tst-mqueue5 The syscall args were getting clobbered, so use scratch regs which are not used for syscall args 00002690 <mq_timedsend>: ; SINGLE_THREAD_P 2690: sub r1,r25,0x448 <--- clobers r1, r2 2698: ld r2,[r1] 269c: cmp r2,0 26a0: bz mq_timedsend_nocancel ; DOCARGS (saves syscall args but r1, r2 clobbered already) 26a4: st.aw blink,[sp,-4] 26a8: st.aw r0,[sp,-4] 26ac: st.aw r1,[sp,-4] 26b0: st.aw r2,[sp,-4] 26b4: st.aw r3,[sp,-4] 26b8: st.aw r4,[sp,-4] 26bc: bl 1e28 <__librt_enable_asynccancel> Reported-by: Eugeniy Paltsev &lt;paltsev(a)synopsys.com&gt; Cc: Alexey Brodkin &lt;abrodkin(a)synopsys.com&gt; Signed-off-by: Vineet Gupta &lt;vgupta(a)synopsys.com&gt; --- libpthread/nptl/sysdeps/unix/sysv/linux/arc/sysdep-cancel.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/arc/sysdep-cancel.h b/libpthread/nptl/sysdeps/unix/sysv/linux/arc/sysdep-cancel.h index cddd754a8680..918f61d67548 100644 --- a/libpthread/nptl/sysdeps/unix/sysv/linux/arc/sysdep-cancel.h +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/arc/sysdep-cancel.h @@ -99,9 +99,9 @@ #define UNDOCARGS_7 pop r6` UNDOCARGS_6 # define SINGLE_THREAD_P \ - THREAD_SELF r1 ` \ - ld r2, [r1, MULTIPLE_THREADS_OFFSET]` \ - cmp r2, 0 + THREAD_SELF r9 ` \ + ld r10, [r9, MULTIPLE_THREADS_OFFSET]` \ + cmp r10, 0 /* ld r2, [r1, -TLS_PRE_TCB_SIZE + MULTIPLE_THREADS_OFFSET] */ #else /* !__ASSEMBLER__ */ -- 2.7.4