1#ifndef _ASM_POWERPC_SECTIONS_H
2#define _ASM_POWERPC_SECTIONS_H
3#ifdef __KERNEL__
4
5#include <linux/elf.h>
6#include <linux/uaccess.h>
7#include <asm-generic/sections.h>
8
9#ifdef __powerpc64__
10
11extern char __start_interrupts[];
12extern char __end_interrupts[];
13
14extern char __prom_init_toc_start[];
15extern char __prom_init_toc_end[];
16
17static inline int in_kernel_text(unsigned long addr)
18{
19	if (addr >= (unsigned long)_stext && addr < (unsigned long)__init_end)
20		return 1;
21
22	return 0;
23}
24
25static inline int overlaps_interrupt_vector_text(unsigned long start,
26							unsigned long end)
27{
28	unsigned long real_start, real_end;
29	real_start = __start_interrupts - _stext;
30	real_end = __end_interrupts - _stext;
31
32	return start < (unsigned long)__va(real_end) &&
33		(unsigned long)__va(real_start) < end;
34}
35
36static inline int overlaps_kernel_text(unsigned long start, unsigned long end)
37{
38	return start < (unsigned long)__init_end &&
39		(unsigned long)_stext < end;
40}
41
42static inline int overlaps_kvm_tmp(unsigned long start, unsigned long end)
43{
44#ifdef CONFIG_KVM_GUEST
45	extern char kvm_tmp[];
46	return start < (unsigned long)kvm_tmp &&
47		(unsigned long)&kvm_tmp[1024 * 1024] < end;
48#else
49	return 0;
50#endif
51}
52
53#if !defined(_CALL_ELF) || _CALL_ELF != 2
54#undef dereference_function_descriptor
55static inline void *dereference_function_descriptor(void *ptr)
56{
57	struct ppc64_opd_entry *desc = ptr;
58	void *p;
59
60	if (!probe_kernel_address(&desc->funcaddr, p))
61		ptr = p;
62	return ptr;
63}
64#endif
65
66#endif
67
68#endif /* __KERNEL__ */
69#endif	/* _ASM_POWERPC_SECTIONS_H */
70