The mm->start_code/end_code, mm->start_data/end_data, mm->start_brk are involved into calculation of program text/data segment sizes (which might be seen in /proc//statm) and into brk() call final address. In a sake of restore we need to know all these values. While mm->start_code/end_code already present in /proc/$pid/stat, the rest members are not, so this patch brings them in. The restore procedure of these members is addressed in another patch and uses prctl facility. v2: - Kees and Alexey pointed out that "1" hack is unnecessary, so make it to have plain (mm && permitted) ? mm->member : 0 form. v3: - Andrew pointed that documentation update is missed. Chagelog is updated as well. v4: - Update proc.txt to address concerns from Kees and Kame. Signed-off-by: Cyrill Gorcunov Acked-by: Serge Hallyn Reviewed-by: Kees Cook Reviewed-by: KAMEZAWA Hiroyuki CC: Alexey Dobriyan --- Documentation/filesystems/proc.txt | 3 +++ fs/proc/array.c | 7 +++++-- 2 files changed, 8 insertions(+), 2 deletions(-) Index: linux-2.6.git/Documentation/filesystems/proc.txt =================================================================== --- linux-2.6.git.orig/Documentation/filesystems/proc.txt +++ linux-2.6.git/Documentation/filesystems/proc.txt @@ -305,6 +305,9 @@ Table 1-4: Contents of the stat files (a blkio_ticks time spent waiting for block IO gtime guest time of the task in jiffies cgtime guest time of the task children in jiffies + start_data address above which program data+bss is placed + end_data address below which program data+bss is placed + start_brk address above which program heap can be expaned with brk() call .............................................................................. The /proc/PID/maps file containing the currently mapped memory regions and Index: linux-2.6.git/fs/proc/array.c =================================================================== --- linux-2.6.git.orig/fs/proc/array.c +++ linux-2.6.git/fs/proc/array.c @@ -464,7 +464,7 @@ static int do_task_stat(struct seq_file seq_printf(m, "%d (%s) %c %d %d %d %d %d %u %lu \ %lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \ -%lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld\n", +%lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld %lu %lu %lu\n", pid_nr_ns(pid, ns), tcomm, state, @@ -511,7 +511,10 @@ static int do_task_stat(struct seq_file task->policy, (unsigned long long)delayacct_blkio_ticks(task), cputime_to_clock_t(gtime), - cputime_to_clock_t(cgtime)); + cputime_to_clock_t(cgtime), + (mm && permitted) ? mm->start_data : 0, + (mm && permitted) ? mm->end_data : 0, + (mm && permitted) ? mm->start_brk : 0); if (mm) mmput(mm); return 0; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/