root/arch/ia64/include/asm/sections.h

INCLUDED FROM

DEFINITIONS

1. dereference_function_descriptor
2. dereference_kernel_function_descriptor

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_IA64_SECTIONS_H
   3 #define _ASM_IA64_SECTIONS_H
   4 
   5 /*
   6  * Copyright (C) 1998-2003 Hewlett-Packard Co
   7  *      David Mosberger-Tang <davidm@hpl.hp.com>
   8  */
   9 
  10 #include <linux/elf.h>
  11 #include <linux/uaccess.h>
  12 #include <asm-generic/sections.h>
  13 
  14 extern char __phys_per_cpu_start[];
  15 #ifdef  CONFIG_SMP
  16 extern char __cpu0_per_cpu[];
  17 #endif
  18 extern char __start___vtop_patchlist[], __end___vtop_patchlist[];
  19 extern char __start___rse_patchlist[], __end___rse_patchlist[];
  20 extern char __start___mckinley_e9_bundles[], __end___mckinley_e9_bundles[];
  21 extern char __start___phys_stack_reg_patchlist[], __end___phys_stack_reg_patchlist[];
  22 extern char __start_gate_section[];
  23 extern char __start_gate_mckinley_e9_patchlist[], __end_gate_mckinley_e9_patchlist[];
  24 extern char __start_gate_vtop_patchlist[], __end_gate_vtop_patchlist[];
  25 extern char __start_gate_fsyscall_patchlist[], __end_gate_fsyscall_patchlist[];
  26 extern char __start_gate_brl_fsys_bubble_down_patchlist[], __end_gate_brl_fsys_bubble_down_patchlist[];
  27 extern char __start_unwind[], __end_unwind[];
  28 extern char __start_ivt_text[], __end_ivt_text[];
  29 
  30 #define HAVE_DEREFERENCE_FUNCTION_DESCRIPTOR 1
  31 
  32 #undef dereference_function_descriptor
  33 static inline void *dereference_function_descriptor(void *ptr)
  34 {
  35         struct fdesc *desc = ptr;
  36         void *p;
  37 
  38         if (!probe_kernel_address(&desc->ip, p))
  39                 ptr = p;
  40         return ptr;
  41 }
  42 
  43 #undef dereference_kernel_function_descriptor
  44 static inline void *dereference_kernel_function_descriptor(void *ptr)
  45 {
  46         if (ptr < (void *)__start_opd || ptr >= (void *)__end_opd)
  47                 return ptr;
  48         return dereference_function_descriptor(ptr);
  49 }
  50 
  51 #endif /* _ASM_IA64_SECTIONS_H */