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| author | H. Peter Anvin <hpa@zytor.com> | 2012-03-05 22:40:24 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2012-03-06 00:35:18 +0100 |
| commit | e7084fd52ed71249ab2ce7a7d89d601c9d1f904c (patch) | |
| tree | 354bdaa09b665f4e6d01ffdab2a26f8ceca9d630 /arch/x86/ia32 | |
| parent | x32: Provide separate is_ia32_task() and is_x32_task() predicates (diff) | |
| download | linux-e7084fd52ed71249ab2ce7a7d89d601c9d1f904c.tar.xz linux-e7084fd52ed71249ab2ce7a7d89d601c9d1f904c.zip | |
x32: Switch to a 64-bit clock_t
clock_t is used mainly to give the number of jiffies a certain process
has burned. It is entirely feasible for a long-running process to
consume more than 2^32 jiffies especially in a multiprocess system.
As such, switch to a 64-bit clock_t for x32, just as we already
switched to a 64-bit time_t.
clock_t is only used in a handful of places, and as such it is really
not a very significant change. The one that has the biggest impact is
in struct siginfo, but since the *size* of struct siginfo doesn't
change (it is padded to the hilt) it is fairly easy to make this a
localized change.
This also gets rid of sys_x32_times, however since this is a pretty
late change don't compactify the system call numbers; we can reuse
system call slot 521 next time we need an x32 system call.
Reported-by: Gregory M. Lueck <gregory.m.lueck@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: H. J. Lu <hjl.tools@gmail.com>
Link: http://lkml.kernel.org/r/1329696488-16970-1-git-send-email-hpa@zytor.com
Diffstat (limited to 'arch/x86/ia32')
| -rw-r--r-- | arch/x86/ia32/ia32_signal.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c index 25d80f3faf2e..bc09ed2a8b97 100644 --- a/arch/x86/ia32/ia32_signal.c +++ b/arch/x86/ia32/ia32_signal.c @@ -37,6 +37,7 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) { int err = 0; + bool ia32 = !is_ia32_task(); if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t))) return -EFAULT; @@ -66,8 +67,13 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) case __SI_FAULT >> 16: break; case __SI_CHLD >> 16: - put_user_ex(from->si_utime, &to->si_utime); - put_user_ex(from->si_stime, &to->si_stime); + if (ia32) { + put_user_ex(from->si_utime, &to->si_utime); + put_user_ex(from->si_stime, &to->si_stime); + } else { + put_user_ex(from->si_utime, &to->_sifields._sigchld_x32._utime); + put_user_ex(from->si_stime, &to->_sifields._sigchld_x32._stime); + } put_user_ex(from->si_status, &to->si_status); /* FALL THROUGH */ default: |