[ARM] disable NX support for OABI-supporting kernels
Our signal syscall restart handling for these kernels still uses the userspace stack to build code for restarting the syscall. Unfortunately, fixing this is non-trivial, and so for the time being, we resolve the problem by disabling NX support. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -78,6 +78,15 @@ int arm_elf_read_implies_exec(const struct elf32_hdr *x, int executable_stack)
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return 1;
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if (cpu_architecture() < CPU_ARCH_ARMv6)
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return 1;
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#if !defined(CONFIG_AEABI) || defined(CONFIG_OABI_COMPAT)
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/*
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* If we have support for OABI programs, we can never allow NX
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* support - our signal syscall restart mechanism relies upon
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* being able to execute code placed on the user stack.
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*/
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return 1;
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#else
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return 0;
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#endif
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}
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EXPORT_SYMBOL(arm_elf_read_implies_exec);
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