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| author | David Woodhouse <dwmw2@shinybook.infradead.org> | 2005-05-03 08:14:09 +0100 |
|---|---|---|
| committer | David Woodhouse <dwmw2@shinybook.infradead.org> | 2005-05-03 08:14:09 +0100 |
| commit | 27b030d58c8e72fc7a95187a791bd9406e350f02 (patch) | |
| tree | ab3bab7f39a5ce5bab65578a7e08fa4dfdeb198c /include/asm-ppc64/page.h | |
| parent | 79d20b14a0d651f15b0ef9a22b6cf12d284a6d38 (diff) | |
| parent | 6628465e33ca694bd8fd5c3cf4eb7ff9177bc694 (diff) | |
Merge with master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Diffstat (limited to 'include/asm-ppc64/page.h')
| -rw-r--r-- | include/asm-ppc64/page.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/include/asm-ppc64/page.h b/include/asm-ppc64/page.h index 20e0f19324e8..86219574c1a5 100644 --- a/include/asm-ppc64/page.h +++ b/include/asm-ppc64/page.h @@ -252,10 +252,19 @@ extern u64 ppc64_pft_size; /* Log 2 of page table size */ /* * This is the default if a program doesn't have a PT_GNU_STACK - * program header entry. + * program header entry. The PPC64 ELF ABI has a non executable stack + * stack by default, so in the absense of a PT_GNU_STACK program header + * we turn execute permission off. */ -#define VM_STACK_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ - VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) +#define VM_STACK_DEFAULT_FLAGS32 (VM_READ | VM_WRITE | VM_EXEC | \ + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) + +#define VM_STACK_DEFAULT_FLAGS64 (VM_READ | VM_WRITE | \ + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) + +#define VM_STACK_DEFAULT_FLAGS \ + (test_thread_flag(TIF_32BIT) ? \ + VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64) #endif /* __KERNEL__ */ #endif /* _PPC64_PAGE_H */ |