sections.h 1.5 KB
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#ifndef _ASM_POWERPC_SECTIONS_H
#define _ASM_POWERPC_SECTIONS_H
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#ifdef __KERNEL__
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#include <linux/elf.h>
#include <linux/uaccess.h>
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#include <asm-generic/sections.h>

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#ifdef __powerpc64__
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extern char __start_interrupts[];
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extern char __end_interrupts[];
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extern char __prom_init_toc_start[];
extern char __prom_init_toc_end[];

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static inline int in_kernel_text(unsigned long addr)
{
	if (addr >= (unsigned long)_stext && addr < (unsigned long)__init_end)
		return 1;

	return 0;
}

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static inline int overlaps_interrupt_vector_text(unsigned long start,
							unsigned long end)
{
	unsigned long real_start, real_end;
	real_start = __start_interrupts - _stext;
	real_end = __end_interrupts - _stext;

	return start < (unsigned long)__va(real_end) &&
		(unsigned long)__va(real_start) < end;
}

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static inline int overlaps_kernel_text(unsigned long start, unsigned long end)
{
	return start < (unsigned long)__init_end &&
		(unsigned long)_stext < end;
}

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static inline int overlaps_kvm_tmp(unsigned long start, unsigned long end)
{
#ifdef CONFIG_KVM_GUEST
	extern char kvm_tmp[];
	return start < (unsigned long)kvm_tmp &&
		(unsigned long)&kvm_tmp[1024 * 1024] < end;
#else
	return 0;
#endif
}

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#undef dereference_function_descriptor
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static inline void *dereference_function_descriptor(void *ptr)
{
	struct ppc64_opd_entry *desc = ptr;
	void *p;

	if (!probe_kernel_address(&desc->funcaddr, p))
		ptr = p;
	return ptr;
}
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#endif
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#endif /* __KERNEL__ */
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#endif	/* _ASM_POWERPC_SECTIONS_H */