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 11 extern char __start_interrupts[]; 12 extern char __end_interrupts[]; 13 14 extern char __prom_init_toc_start[]; 15 extern char __prom_init_toc_end[]; 16 17 static 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 25 static 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 36 static 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 42 static 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 55 static 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