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Hi all, i was testing a linux setitimer to make some led blink, from following c++ code: static void timer_handler(int signum) { static unsigned short value = 0xff; *((unsigned short *)0x10000248) = (value & 0xff); value = ~value; } string cmd_parser::on_cmd_blink(const string &state) { stringstream ss; struct sigaction sa; struct itimerval timer; memset(&timer, 0, sizeof(struct itimerval)); if (state == "on") { /* install timer_handler as the signal handler for SIGALRM. */ memset(&sa, 0, sizeof(sa)); sa.sa_handler = &timer_handler; sigaction(SIGALRM, &sa, NULL); /* configure the timer to expire after 0,5 sec... */ timer.it_value.tv_sec = 0; timer.it_value.tv_usec = 500000; /* ... and every 0,5 sec after that. */ timer.it_interval.tv_sec = 0; timer.it_interval.tv_usec = 500000; setitimer(ITIMER_REAL, &timer, NULL); ss << "blinking on\r\n"; <<<<<<<<<<<<< } else if (state == "off") { /* timer stop */ setitimer(ITIMER_REAL, &timer, NULL); ss << "blinking disabled\r\n"; } return ss.str(); } If i leave the line above marked with "<<<<<<<<<<<<<" i get SIGILL on the execution of setitimer if i comment the line out, timer works properly and led blinks. I have: mcf5307 ~ # cat /proc/version uClinux version 3.10.0-uc0amcore-001 (angelo@jerusalem) (gcc version 4.5.1 (GCC) ) #70 Wed May 4 21:37:35 CEST 2016 ~ # makefile: PREFIX=/opt/toolchains/m68k/Sourcery_CodeBench_Lite_for_ColdFire_uClinux/bin/m68k-uclinux- CPP=$(PREFIX)g++ STRIP=$(PREFIX)strip FLTHDR=$(PREFIX)flthdr LD=$(PREFIX)ld BINNAME=cfbot BINDIR=bin SRCDIR=src OBJDIR=obj INCLUDES=-Iinclude SRCS:= $(wildcard $(SRCDIR)/*.cc) OBJS:= $(patsubst %.cc,%.o,$(SRCS)) OBJS:= $(patsubst $(SRCDIR)%,$(OBJDIR)%,$(OBJS)) CFLAGS=-Os -s -m5307 -ffunction-sections -fdata-sections LDFLAGS=-m5307 -Wl,--gc-sections LIBS= TFTP="192.168.0.80\\nmode binary\\nput bin/cfbm /tmp" $(BINDIR)/$(BINNAME): $(OBJS) $(CPP) $(OBJS) $(LDFLAGS) -o $@ $(LIBS) # $(STRIP) $@ # $(FLTHDR) -s 65535 $@ # atftp --option "mode octet" -p -l $(BINDIR)/$(BINNAME) -r /tmp/$(BINNAME) 192.168.0.80 $(OBJDIR)/%.o: $(SRCDIR)/%.cc $(CPP) $(CFLAGS) $(INCLUDES) -Wall -c -o $@ $< clean: rm -f bin/* rm -f obj/*.o Every help is appreciated, thanks, angelo |
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