debuggers.hg

changeset 21059:31ee49f2c4ea

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hvm: correct time offset update in RTC write emulation

mktime takes a month in 1..12 form while tm->tm_mon contains 0..11 so
we need to add 1. Without this fix setting the month back or forward a
month inside the guest would lead to the wrong number of days being
added/subtracted.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Mar 09 09:57:25 2010 +0000 (2010-03-09)
parents ef845a385014
children efa827c5bf73
files xen/arch/x86/hvm/rtc.c
line diff
     1.1 --- a/xen/arch/x86/hvm/rtc.c	Tue Mar 09 09:54:39 2010 +0000
     1.2 +++ b/xen/arch/x86/hvm/rtc.c	Tue Mar 09 09:57:25 2010 +0000
     1.3 @@ -165,7 +165,7 @@ static void rtc_set_time(RTCState *s)
     1.4        
     1.5      ASSERT(spin_is_locked(&s->lock));
     1.6  
     1.7 -    before = mktime(tm->tm_year, tm->tm_mon, tm->tm_mday,
     1.8 +    before = mktime(tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
     1.9  		    tm->tm_hour, tm->tm_min, tm->tm_sec);
    1.10      
    1.11      tm->tm_sec = from_bcd(s, s->hw.cmos_data[RTC_SECONDS]);
    1.12 @@ -179,7 +179,7 @@ static void rtc_set_time(RTCState *s)
    1.13      tm->tm_mon = from_bcd(s, s->hw.cmos_data[RTC_MONTH]) - 1;
    1.14      tm->tm_year = from_bcd(s, s->hw.cmos_data[RTC_YEAR]) + 100;
    1.15  
    1.16 -    after = mktime(tm->tm_year, tm->tm_mon, tm->tm_mday,
    1.17 +    after = mktime(tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
    1.18                     tm->tm_hour, tm->tm_min, tm->tm_sec);
    1.19  
    1.20      /* We use the guest's setting of the RTC to define the local-time