This is the mail archive of the newlib@sourceware.org mailing list for the newlib project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

gmtime_r hanging


Hi,
I'm trying to use newlib on an STM32 and I ran across an oddity with gmtime_r

<snip>
    char	buf[128];
    struct tm	nowtm;
    time_t	now;
<snip>
		now = time(NULL);
		printf("Time is %d\r\n", (int)now);
		gmtime_r(&now, &nowtm);
		strftime(buf, sizeof(buf) - 1, "Time is %Y/%m/%d %H:%M:%S\r\rn", &nowtm);
<snip>

Breakpoint 1, gmtime_r (tim_p=0x2000ffdc, res=0x2000ffb8) at ../../../../../../gcc-4.6.1/newlib/libc/time/gmtime_r.c:13
13	  return (_mktm_r (tim_p, res, 1));
(gdb) stepi
0x0800175c	13	  return (_mktm_r (tim_p, res, 1));
(gdb) 
_mktm_r (tim_p=<value optimized out>, res=<value optimized out>, is_gmtime=<value optimized out>)
    at ../../../../../../gcc-4.6.1/newlib/libc/time/mktm_r.c:32
32	{
(gdb) 
0x08001fd2	32	{
(gdb) 
0x08001fd4	32	{
(gdb) 
0x08001fd6	32	{
(gdb) 
0x08001fd8	32	{
(gdb) 
0x08001fda	32	{
(gdb) 
32	{
(gdb) 
0x08001fde	32	{
(gdb) 
0x08001fe0	32	{
(gdb) 
38	   __tzinfo_type *tz = __gettzinfo ();
(gdb) 
__gettzinfo () at /Users/darius/projects/stm32test/syscalls.c:161
161	}
(gdb) 
0x080005c4	161	}
(gdb) 
0x08001fe6 in _mktm_r (tim_p=0x2000ffdc, res=0x2000ffb8, is_gmtime=1) at ../../../../../../gcc-4.6.1/newlib/libc/time/mktm_r.c:38
38	   __tzinfo_type *tz = __gettzinfo ();
(gdb) 
41	  lcltime = *tim_p;
(gdb) 
0x08001fea	41	  lcltime = *tim_p;
(gdb) 
43	  days = ((long)lcltime) / SECSPERDAY;
(gdb) 
0x08001fee	43	  days = ((long)lcltime) / SECSPERDAY;
(gdb) 
0x08001ff0	43	  days = ((long)lcltime) / SECSPERDAY;
(gdb) 
0x00000000 in ?? ()
(gdb) 

I have no idea why it's jumping to NULL doing a division :(

--
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C







Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]