sections.h (1459B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_POWERPC_SECTIONS_H 3#define _ASM_POWERPC_SECTIONS_H 4#ifdef __KERNEL__ 5 6#include <linux/elf.h> 7#include <linux/uaccess.h> 8 9#ifdef CONFIG_HAVE_FUNCTION_DESCRIPTORS 10typedef struct func_desc func_desc_t; 11#endif 12 13#include <asm-generic/sections.h> 14 15extern char __head_end[]; 16 17#ifdef __powerpc64__ 18 19extern char __start_interrupts[]; 20extern char __end_interrupts[]; 21 22extern char __prom_init_toc_start[]; 23extern char __prom_init_toc_end[]; 24 25#ifdef CONFIG_PPC_POWERNV 26extern char start_real_trampolines[]; 27extern char end_real_trampolines[]; 28extern char start_virt_trampolines[]; 29extern char end_virt_trampolines[]; 30#endif 31 32/* 33 * This assumes the kernel is never compiled -mcmodel=small or 34 * the total .toc is always less than 64k. 35 */ 36static inline unsigned long kernel_toc_addr(void) 37{ 38 unsigned long toc_ptr; 39 40 asm volatile("mr %0, 2" : "=r" (toc_ptr)); 41 return toc_ptr; 42} 43 44static inline int overlaps_interrupt_vector_text(unsigned long start, 45 unsigned long end) 46{ 47 unsigned long real_start, real_end; 48 real_start = __start_interrupts - _stext; 49 real_end = __end_interrupts - _stext; 50 51 return start < (unsigned long)__va(real_end) && 52 (unsigned long)__va(real_start) < end; 53} 54 55static inline int overlaps_kernel_text(unsigned long start, unsigned long end) 56{ 57 return start < (unsigned long)__init_end && 58 (unsigned long)_stext < end; 59} 60 61#endif 62 63#endif /* __KERNEL__ */ 64#endif /* _ASM_POWERPC_SECTIONS_H */