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| author | Jiri Slaby <jirislaby@gmail.com> | 2008-04-12 10:28:25 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-19 19:19:55 +0200 |
| commit | f5a1b191b37ac2609e2babeec1b21f411da93e4d (patch) | |
| tree | 6017595df33f0ecad9f506cc560d86248032873e | |
| parent | 4a9f54cfd21f313b9858f951783512d3f14e58a4 (diff) | |
x86: fix exec mappings comments
- 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>
| -rw-r--r-- | Documentation/kernel-parameters.txt | 10 | ||||
| -rw-r--r-- | arch/x86/kernel/setup64.c | 4 |
2 files changed, 11 insertions, 3 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 4b0f1ae31a4c..f4839606988b 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -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 diff --git a/arch/x86/kernel/setup64.c b/arch/x86/kernel/setup64.c index 9042fb0e36f5..aee0e8200777 100644 --- a/arch/x86/kernel/setup64.c +++ b/arch/x86/kernel/setup64.c @@ -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) { |