https://bugs.kde.org/show_bug.cgi?id=416682
Krishna <muppakrish...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |muppakrish...@gmail.com
--- Comment #3 from Krishna <muppakrish...@gmail.com> ---
Created attachment 125712
--> https://bugs.kde.org/attachment.cgi?id=125712&action=edit
simple mmap testapp execution log
In further investigation, found the issue is with invalid offset under
valgrind.
And in high-level, During normal run mmap2 is getting executed where as mmap is
getting executed under valgrind.
Attached strace bootup logs for reference.
Normal Run:
open("/tmp/1.txt", O_RDWR|O_CREAT|O_TRUNC|O_LARGEFILE, 017754017774) = 3
mmap2(NULL, 157286400, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0xc0200000) =
0x6e196000
Valgrind Run:
open("/tmp/1.txt", O_RDWR|O_CREAT|O_TRUNC|O_LARGEFILE, 017662266754) = 3
mmap(0x4980000, 157286400, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, 3,
0xc0200000) = 0x4980000
And it looks based on mapping for syscalls. if so where this can be configured
for mips_mmap2 in valgrind code.
SYSCALL_DEFINE6(mips_mmap, unsigned long, addr, unsigned long, len,
unsigned long, prot, unsigned long, flags, unsigned long,
fd, off_t, offset)
{
unsigned long result;
result = -EINVAL;
if (offset & ~PAGE_MASK)
goto out;
result = sys_mmap_pgoff(addr, len, prot, flags, fd, offset >>
PAGE_SHIFT);
out:
return result;
}
SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len,
unsigned long, prot, unsigned long, flags, unsigned long, fd,
unsigned long, pgoff)
{
if (pgoff & (~PAGE_MASK >> 12))
return -EINVAL;
return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >>
(PAGE_SHIFT-12));
}
--
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