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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2020-06-29 11:15:26 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-07-27 00:01:30 +1000 |
| commit | 6ca055322da8fe25ff9ac50db6f3b7b59b6f961c (patch) | |
| tree | 3de91cb2f36db895cd90d8294ae9b7e451426100 /arch/powerpc/mm | |
| parent | f1a1f7a15eb0e13b84791ff2738b84e414501718 (diff) | |
| download | linux-6ca055322da8fe25ff9ac50db6f3b7b59b6f961c.tar.bz2 | |
powerpc/32s: Use dedicated segment for modules with STRICT_KERNEL_RWX
When STRICT_KERNEL_RWX is set, we want to set NX bit on vmalloc
segments. But modules require exec.
Use a dedicated segment for modules. There is not much space
above kernel, and we don't waste vmalloc space to do alignment.
Therefore, we take the segment before PAGE_OFFSET for modules.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/eb8faba9148b6cf17c696ba776b4e8ee2f6313bf.1593428200.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/ptdump/ptdump.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/mm/ptdump/ptdump.c b/arch/powerpc/mm/ptdump/ptdump.c index 9d942136c7be..b2ed1ca4f254 100644 --- a/arch/powerpc/mm/ptdump/ptdump.c +++ b/arch/powerpc/mm/ptdump/ptdump.c @@ -74,6 +74,10 @@ struct addr_marker { static struct addr_marker address_markers[] = { { 0, "Start of kernel VM" }, +#ifdef MODULES_VADDR + { 0, "modules start" }, + { 0, "modules end" }, +#endif { 0, "vmalloc() Area" }, { 0, "vmalloc() End" }, #ifdef CONFIG_PPC64 @@ -353,6 +357,10 @@ static void populate_markers(void) #else address_markers[i++].start_address = TASK_SIZE; #endif +#ifdef MODULES_VADDR + address_markers[i++].start_address = MODULES_VADDR; + address_markers[i++].start_address = MODULES_END; +#endif address_markers[i++].start_address = VMALLOC_START; address_markers[i++].start_address = VMALLOC_END; #ifdef CONFIG_PPC64 |