diff options
Diffstat (limited to 'winsup/cygwin/gendef')
| -rwxr-xr-x | winsup/cygwin/gendef | 71 |
1 files changed, 55 insertions, 16 deletions
diff --git a/winsup/cygwin/gendef b/winsup/cygwin/gendef index 5cc06f76c..a76711279 100755 --- a/winsup/cygwin/gendef +++ b/winsup/cygwin/gendef @@ -162,23 +162,62 @@ __sigbe: # return here after cygwin syscall .global _sigdelayed _sigdelayed: - pushl %ebp - movl %esp,%ebp + pushl %ebp + movl %esp,%ebp pushf - pushl %esi - pushl %edi - pushl %edx - pushl %ecx - pushl %ebx - pushl %eax - movl %fs:4,%ebx # get tls - pushl $tls::saved_errno(%ebx) # saved errno - - movl \$$tls::start_offset,%eax # point to beginning - addl %ebx,%eax # of tls block - call __ZN7_cygtls19call_signal_handlerEv # call handler + pushl %esi + pushl %edi + pushl %edx + pushl %ecx + pushl %ebx + pushl %eax + movl %fs:4,%ebx +1: movl \$1,%eax + xchgl %eax,$tls::stacklock(%ebx) + movl %eax,$tls::spinning(%ebx) # flag if we are waiting for lock + # If %eax is 1 then someone else has + # the lock but we want to flag that + # we're waiting for it. If %eax is 0 + # then we're not spinning and 0 will + # reflect that. + testl %eax,%eax + jz 2f + call _yield + jmp 1b +2: incl $tls::incyg(%ebx) + movl $tls::sig(%ebx),%eax + testl %eax,%eax + jz leave # call_signal_handler may have beat us + # to it + pushl $tls::saved_errno(%ebx) # saved errno + call _set_process_mask_delta + pushl %eax + + # fill out handler arguments + xorl %eax,%eax # ucontext_t (currently not set) + pushl %eax + leal $tls::infodata(%ebx),%eax + pushl %eax # siginfo + pushl $tls::sig(%ebx) # signal number + + pushl \$_sigreturn # where to return + pushl $tls::func(%ebx) # user-supplied signal func + cmpl \$0,$tls::threadkill(%ebx)#pthread_kill signal? + jnz 4f # yes. callee clears signal number + movl \$0,$tls::sig(%ebx) # zero the signal number as a + # flag to the signal handler thread + # that it is ok to set up sigsave +4: decl $tls::incyg(%ebx) + decl $tls::stacklock(%ebx) + ret # return via signal handler + + .global _sigreturn +_sigreturn: + movl %fs:4,%ebx + incl $tls::incyg(%ebx) + addl \$12,%esp # remove arguments + call _set_process_mask\@4 - movl %fs:4,%ebx # reget tls 1: movl \$1,%eax # potential lock value xchgl %eax,$tls::stacklock(%ebx) # see if we can grab it movl %eax,$tls::spinning(%ebx) # flag if we are waiting for lock @@ -255,7 +294,7 @@ stabilize_sig_stack: cmpl \$0,$tls::sig(%ebx) jz 3f decl $tls::stacklock(%ebx) # unlock - movl \$$tls::start_offset,%eax # point to beginning + movl \$-$tls::sizeof__cygtls,%eax # point to beginning addl %ebx,%eax # of tls block call __ZN7_cygtls19call_signal_handlerEv jmp 1b |