mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
8e30788816
We are moving towards separate kernel and module function descriptor dereference callbacks. This patch enables it for IA64. For pointers that belong to the kernel - Added __start_opd and __end_opd pointers, to track the kernel .opd section address range; - Added dereference_kernel_function_descriptor(). Now we will dereference only function pointers that are within [__start_opd, __end_opd); For pointers that belong to a module - Added dereference_module_function_descriptor() to handle module function descriptor dereference. Now we will dereference only pointers that are within [module->opd.start, module->opd.end). Link: http://lkml.kernel.org/r/20171109234830.5067-3-sergey.senozhatsky@gmail.com To: Fenghua Yu <fenghua.yu@intel.com> To: Helge Deller <deller@gmx.de> To: Benjamin Herrenschmidt <benh@kernel.crashing.org> To: Paul Mackerras <paulus@samba.org> To: Michael Ellerman <mpe@ellerman.id.au> To: James Bottomley <jejb@parisc-linux.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jessica Yu <jeyu@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: linux-ia64@vger.kernel.org Cc: linux-parisc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Tested-by: Tony Luck <tony.luck@intel.com> #ia64 Signed-off-by: Petr Mladek <pmladek@suse.com>
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* 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 (!probe_kernel_address(&desc->ip, p))
|
|
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 */
|