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mips32: Fix the align problem with mmap.

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Valgrind is doing mmap always with MAP_FIXED. On mips32 we need to check arg4.
If the arg4 is MAP_SHARED we need to align the address to SHMLBA.
If the program tries to do mmap with VKI_FIXED Valgrind doesn't need to align
the address to SHMLBA.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13593
This commit is contained in:
Dejan Jevtic 2013-10-01 10:34:54 +00:00
parent 512044b6e9
commit 5944b58df7
1 changed files with 4 additions and 3 deletions
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7
coregrind/m_syswrap/syswrap-mips32-linux.c
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@ -448,14 +448,15 @@ static SysRes mips_PRE_sys_mmap(ThreadId tid,
mreq.rkind = MAny;
}
if ((VKI_SHMLBA > VKI_PAGE_SIZE) && (VKI_MAP_SHARED & arg4)) {
if ((VKI_SHMLBA > VKI_PAGE_SIZE) && (VKI_MAP_SHARED & arg4)
&& !(VKI_MAP_FIXED & arg4))
mreq.len = arg2 + VKI_SHMLBA - VKI_PAGE_SIZE;
}
/* Enquire ... */
advised = VG_(am_get_advisory)( &mreq, True/*client*/, &mreq_ok );
if ((VKI_SHMLBA > VKI_PAGE_SIZE) && (VKI_MAP_SHARED & arg4))
if ((VKI_SHMLBA > VKI_PAGE_SIZE) && (VKI_MAP_SHARED & arg4)
&& !(VKI_MAP_FIXED & arg4))
advised = VG_ROUNDUP(advised, VKI_SHMLBA);
if (!mreq_ok) {