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