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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_POWERPC_SECTIONS_H #define _ASM_POWERPC_SECTIONS_H #ifdef __KERNEL__ #include <linux/elf.h> #include <linux/uaccess.h> #include <asm-generic/sections.h> extern char __head_end[]; extern char __srwx_boundary[]; #ifdef __powerpc64__ extern char __start_interrupts[]; extern char __end_interrupts[]; extern char __prom_init_toc_start[]; extern char __prom_init_toc_end[]; #ifdef CONFIG_PPC_POWERNV extern char start_real_trampolines[]; extern char end_real_trampolines[]; extern char start_virt_trampolines[]; extern char end_virt_trampolines[]; #endif /* * This assumes the kernel is never compiled -mcmodel=small or * the total .toc is always less than 64k. */ static inline unsigned long kernel_toc_addr(void) { unsigned long toc_ptr; asm volatile("mr %0, 2" : "=r" (toc_ptr)); return toc_ptr; } 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; } static inline int overlaps_kernel_text(unsigned long start, unsigned long end) { return start < (unsigned long)__init_end && (unsigned long)_stext < end; } #ifdef PPC64_ELF_ABI_v1 #define HAVE_DEREFERENCE_FUNCTION_DESCRIPTOR 1 #undef dereference_function_descriptor static inline void *dereference_function_descriptor(void *ptr) { struct ppc64_opd_entry *desc = ptr; void *p; if (!get_kernel_nofault(p, (void *)&desc->funcaddr)) ptr = p; return ptr; } #undef dereference_kernel_function_descriptor static inline void *dereference_kernel_function_descriptor(void *ptr) { if (ptr < (void *)__start_opd || ptr >= (void *)__end_opd) return ptr; return dereference_function_descriptor(ptr); } #endif /* PPC64_ELF_ABI_v1 */ #endif #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_SECTIONS_H */
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