arch/ia64/include/asm/sections.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_IA64_SECTIONS_H
#define _ASM_IA64_SECTIONS_H

/*
 * Copyright (C) 1998-2003 Hewlett-Packard Co
 *	David Mosberger-Tang <davidm@hpl.hp.com>
 */

#include <linux/elf.h>
#include <linux/uaccess.h>
#include <asm-generic/sections.h>

extern char __phys_per_cpu_start[];
#ifdef	CONFIG_SMP
extern char __cpu0_per_cpu[];
#endif
extern char __start___vtop_patchlist[], __end___vtop_patchlist[];
extern char __start___rse_patchlist[], __end___rse_patchlist[];
extern char __start___mckinley_e9_bundles[], __end___mckinley_e9_bundles[];
extern char __start___phys_stack_reg_patchlist[], __end___phys_stack_reg_patchlist[];
extern char __start_gate_section[];
extern char __start_gate_mckinley_e9_patchlist[], __end_gate_mckinley_e9_patchlist[];
extern char __start_gate_vtop_patchlist[], __end_gate_vtop_patchlist[];
extern char __start_gate_fsyscall_patchlist[], __end_gate_fsyscall_patchlist[];
extern char __start_gate_brl_fsys_bubble_down_patchlist[], __end_gate_brl_fsys_bubble_down_patchlist[];
extern char __start_unwind[], __end_unwind[];
extern char __start_ivt_text[], __end_ivt_text[];

#define HAVE_DEREFERENCE_FUNCTION_DESCRIPTOR 1

#undef dereference_function_descriptor
static inline void *dereference_function_descriptor(void *ptr)
{
	struct fdesc *desc = ptr;
	void *p;

	if (!get_kernel_nofault(p, (void *)&desc->ip))
		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 /* _ASM_IA64_SECTIONS_H */