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x86: fix exec mappings comments

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- noexec32 is on by default for years already
- add noexec32 to kernel-parameters and fix noexec typo in there

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jiri Slaby 2008-04-12 10:28:25 +02:00 committed by Ingo Molnar
parent 4a9f54cfd2
commit f5a1b191b3
2 changed files with 11 additions and 3 deletions
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10
Documentation/kernel-parameters.txt
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@ -1280,8 +1280,16 @@ and is between 256 and 4096 characters. It is defined in the file
noexec [IA-64]
noexec [X86-32,X86-64]
On X86-32 available only on PAE configured kernels.
noexec=on: enable non-executable mappings (default)
noexec=off: disable nn-executable mappings
noexec=off: disable non-executable mappings
noexec32 [X86-64]
This affects only 32-bit executables.
noexec32=on: enable non-executable mappings (default)
read doesn't imply executable mappings
noexec32=off: disable non-executable mappings
read implies executable mappings
nofxsr [BUGS=X86-32] Disables x86 floating point extended
register save and restore. The kernel will only save

4
arch/x86/kernel/setup64.c
View File

@ -74,8 +74,8 @@ int force_personality32 = 0;
Control non executable heap for 32bit processes.
To control the stack too use noexec=off
on PROT_READ does not imply PROT_EXEC for 32bit processes
off PROT_READ implies PROT_EXEC (default)
on PROT_READ does not imply PROT_EXEC for 32bit processes (default)
off PROT_READ implies PROT_EXEC
*/
static int __init nonx32_setup(char *str)
{