Revision 16fbdce62d9c89b794e303f4a232e4749b77e9ac authored by Konstantin Khlebnikov on 10 May 2012, 20:01:43 UTC, committed by Linus Torvalds on 10 May 2012, 22:06:44 UTC
Reset the current pagemap-entry if the current pte isn't present, or if
current vma is over. Otherwise pagemap reports last entry again and
again.
Non-present pte reporting was broken in commit 092b50bacd1c ("pagemap:
introduce data structure for pagemap entry")
Reporting for holes was broken in commit 5aaabe831eb5 ("pagemap: avoid
splitting thp when reading /proc/pid/pagemap")
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Reported-by: Pavel Emelyanov <xemul@parallels.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent bc46f93
ptrace_user.c
#include <errno.h>
#include <asm/ptrace.h>
#include "sysdep/ptrace.h"
int ptrace_getregs(long pid, unsigned long *regs_out)
{
int i;
for (i=0; i < sizeof(struct sys_pt_regs)/sizeof(PPC_REG); ++i) {
errno = 0;
regs_out->regs[i] = ptrace(PTRACE_PEEKUSR, pid, i*4, 0);
if (errno) {
return -errno;
}
}
return 0;
}
int ptrace_setregs(long pid, unsigned long *regs_in)
{
int i;
for (i=0; i < sizeof(struct sys_pt_regs)/sizeof(PPC_REG); ++i) {
if (i != 34 /* FIXME: PT_ORIG_R3 */ && i <= PT_MQ) {
if (ptrace(PTRACE_POKEUSR, pid, i*4, regs_in->regs[i]) < 0) {
return -errno;
}
}
}
return 0;
}
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