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41a88b4547
There are three architectures with function descriptors, try to have common names for the address they contain in order to refactor some functions into generic functions later. powerpc has 'entry' ia64 has 'ip' parisc has 'addr' Vote for 'addr' and update 'struct fdesc' accordingly. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/65b73ac614e4c002c5819d40b42f6f426d2ee52b.1644928018.git.christophe.leroy@csgroup.eu
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_IA64_SECTIONS_H
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#define _ASM_IA64_SECTIONS_H
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/*
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* Copyright (C) 1998-2003 Hewlett-Packard Co
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* David Mosberger-Tang <davidm@hpl.hp.com>
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*/
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#include <linux/elf.h>
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#include <linux/uaccess.h>
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#include <asm-generic/sections.h>
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extern char __phys_per_cpu_start[];
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#ifdef CONFIG_SMP
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extern char __cpu0_per_cpu[];
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#endif
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extern char __start___vtop_patchlist[], __end___vtop_patchlist[];
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extern char __start___rse_patchlist[], __end___rse_patchlist[];
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extern char __start___mckinley_e9_bundles[], __end___mckinley_e9_bundles[];
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extern char __start___phys_stack_reg_patchlist[], __end___phys_stack_reg_patchlist[];
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extern char __start_gate_section[];
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extern char __start_gate_mckinley_e9_patchlist[], __end_gate_mckinley_e9_patchlist[];
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extern char __start_gate_vtop_patchlist[], __end_gate_vtop_patchlist[];
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extern char __start_gate_fsyscall_patchlist[], __end_gate_fsyscall_patchlist[];
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extern char __start_gate_brl_fsys_bubble_down_patchlist[], __end_gate_brl_fsys_bubble_down_patchlist[];
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extern char __start_unwind[], __end_unwind[];
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extern char __start_ivt_text[], __end_ivt_text[];
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#define HAVE_DEREFERENCE_FUNCTION_DESCRIPTOR 1
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#undef dereference_function_descriptor
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static inline void *dereference_function_descriptor(void *ptr)
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{
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struct fdesc *desc = ptr;
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void *p;
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if (!get_kernel_nofault(p, (void *)&desc->addr))
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ptr = p;
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return ptr;
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}
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#undef dereference_kernel_function_descriptor
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static inline void *dereference_kernel_function_descriptor(void *ptr)
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{
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if (ptr < (void *)__start_opd || ptr >= (void *)__end_opd)
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return ptr;
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return dereference_function_descriptor(ptr);
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}
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#endif /* _ASM_IA64_SECTIONS_H */
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