leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
a5b45ded09
linux/arch/powerpc/mm
History
Daniel Walker d5d8ec895c powerpc/mm: Make mmap_64.c compile on 32bit powerpc 
There appears to be no good reason to keep this as 64bit only. It works
on 32bit also, and has checks so that it can work correctly with 32bit
binaries on 64bit hardware which is why I think this works.

I tested this on qemu using the virtex-ml507 machine type.

Before,

/bin2 # ./test & cat /proc/${!}/maps
00100000-00103000 r-xp 00000000 00:00 0          [vdso]
10000000-10007000 r-xp 00000000 00:01 454        /bin2/test
10017000-10018000 rw-p 00007000 00:01 454        /bin2/test
48000000-48020000 r-xp 00000000 00:01 224        /lib/ld-2.11.3.so
48021000-48023000 rw-p 00021000 00:01 224        /lib/ld-2.11.3.so
bfd03000-bfd24000 rw-p 00000000 00:00 0          [stack]
/bin2 # ./test & cat /proc/${!}/maps
00100000-00103000 r-xp 00000000 00:00 0          [vdso]
0fe6e000-0ffd8000 r-xp 00000000 00:01 214        /lib/libc-2.11.3.so
0ffd8000-0ffe8000 ---p 0016a000 00:01 214        /lib/libc-2.11.3.so
0ffe8000-0ffed000 rw-p 0016a000 00:01 214        /lib/libc-2.11.3.so
0ffed000-0fff0000 rw-p 00000000 00:00 0
10000000-10007000 r-xp 00000000 00:01 454        /bin2/test
10017000-10018000 rw-p 00007000 00:01 454        /bin2/test
48000000-48020000 r-xp 00000000 00:01 224        /lib/ld-2.11.3.so
48020000-48021000 rw-p 00000000 00:00 0
48021000-48023000 rw-p 00021000 00:01 224        /lib/ld-2.11.3.so
bf98a000-bf9ab000 rw-p 00000000 00:00 0          [stack]
/bin2 # ./test & cat /proc/${!}/maps
00100000-00103000 r-xp 00000000 00:00 0          [vdso]
0fe6e000-0ffd8000 r-xp 00000000 00:01 214        /lib/libc-2.11.3.so
0ffd8000-0ffe8000 ---p 0016a000 00:01 214        /lib/libc-2.11.3.so
0ffe8000-0ffed000 rw-p 0016a000 00:01 214        /lib/libc-2.11.3.so
0ffed000-0fff0000 rw-p 00000000 00:00 0
10000000-10007000 r-xp 00000000 00:01 454        /bin2/test
10017000-10018000 rw-p 00007000 00:01 454        /bin2/test
48000000-48020000 r-xp 00000000 00:01 224        /lib/ld-2.11.3.so
48020000-48021000 rw-p 00000000 00:00 0
48021000-48023000 rw-p 00021000 00:01 224        /lib/ld-2.11.3.so
bfa54000-bfa75000 rw-p 00000000 00:00 0          [stack]

After,

bash-4.1# ./test & cat /proc/${!}/maps
[7] 803
00100000-00103000 r-xp 00000000 00:00 0          [vdso]
10000000-10007000 r-xp 00000000 00:01 454        /bin2/test
10017000-10018000 rw-p 00007000 00:01 454        /bin2/test
b7eb0000-b7ed0000 r-xp 00000000 00:01 224        /lib/ld-2.11.3.so
b7ed1000-b7ed3000 rw-p 00021000 00:01 224        /lib/ld-2.11.3.so
bfbc0000-bfbe1000 rw-p 00000000 00:00 0          [stack]
bash-4.1# ./test & cat /proc/${!}/maps
[8] 805
00100000-00103000 r-xp 00000000 00:00 0          [vdso]
10000000-10007000 r-xp 00000000 00:01 454        /bin2/test
10017000-10018000 rw-p 00007000 00:01 454        /bin2/test
b7b03000-b7b23000 r-xp 00000000 00:01 224        /lib/ld-2.11.3.so
b7b24000-b7b26000 rw-p 00021000 00:01 224        /lib/ld-2.11.3.so
bfc27000-bfc48000 rw-p 00000000 00:00 0          [stack]
bash-4.1# ./test & cat /proc/${!}/maps
[9] 807
00100000-00103000 r-xp 00000000 00:00 0          [vdso]
10000000-10007000 r-xp 00000000 00:01 454        /bin2/test
10017000-10018000 rw-p 00007000 00:01 454        /bin2/test
b7f37000-b7f57000 r-xp 00000000 00:01 224        /lib/ld-2.11.3.so
b7f58000-b7f5a000 rw-p 00021000 00:01 224        /lib/ld-2.11.3.so
bff96000-bffb7000 rw-p 00000000 00:00 0          [stack]

Signed-off-by: Daniel Walker <dwalker@fifo90.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-06-20 16:55:11 +10:00
..
40x_mmu.c
44x_mmu.c
dma-noncoherent.c
fault.c powerpc: Exception hooks for context tracking subsystem 2013-05-14 16:00:19 +10:00
fsl_booke_mmu.c
gup.c powerpc: Switch 16GB and 16MB explicit hugepages to a different page table format 2013-04-30 15:59:56 +10:00
hash_low_32.S
hash_low_64.S powerpc: Decode the pte-lp-encoding bits correctly. 2013-04-30 16:00:14 +10:00
hash_native_64.c powerpc/mm: Always invalidate tlb on hpte invalidate and update 2013-06-01 08:29:26 +10:00
hash_utils_64.c powerpc: Exception hooks for context tracking subsystem 2013-05-14 16:00:19 +10:00
highmem.c
hugetlbpage-book3e.c
hugetlbpage-hash64.c powerpc: print both base and actual page size on hash failure 2013-04-30 16:00:22 +10:00
hugetlbpage.c powerpc: Switch 16GB and 16MB explicit hugepages to a different page table format 2013-04-30 15:59:56 +10:00
icswx_pid.c
icswx.c powerpc: Fix typo "CONFIG_ICSWX_PID" 2013-04-18 13:03:54 +10:00
icswx.h
init_32.c
init_64.c powerpc: Fix build errors STRICT_MM_TYPECHECKS 2013-05-14 14:36:20 +10:00
Makefile powerpc/mm: Make mmap_64.c compile on 32bit powerpc 2013-06-20 16:55:11 +10:00
mem.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-05-02 10:16:16 -07:00
mmap.c powerpc/mm: Make mmap_64.c compile on 32bit powerpc 2013-06-20 16:55:11 +10:00
mmu_context_hash32.c
mmu_context_hash64.c powerpc: Reduce PTE table memory wastage 2013-04-30 16:00:07 +10:00
mmu_context_nohash.c powerpc/mm/nohash: Ignore NULL stale_map entries 2013-06-20 16:55:10 +10:00
mmu_decl.h
numa.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-05-02 10:16:16 -07:00
pgtable_32.c
pgtable_64.c powerpc: Reduce PTE table memory wastage 2013-04-30 16:00:07 +10:00
pgtable.c
ppc_mmu_32.c
slb_low.S powerpc: Rename USER_ESID_BITS* to ESID_BITS* 2013-03-17 12:45:44 +11:00
slb.c
slice.c mm: use vm_unmapped_area() on powerpc architecture 2013-04-30 11:05:17 +10:00
stab.c
subpage-prot.c
tlb_hash32.c
tlb_hash64.c powerpc: Update kernel VSID range 2013-03-17 12:39:06 +11:00
tlb_low_64e.S
tlb_nohash_low.S
tlb_nohash.c powerpc/fsl-booke: Support detection of page sizes on e6500 2013-03-05 17:10:27 -06:00