linux_dsm_epyc7002/arch/parisc/kernel/vmlinux.lds.S
Sergey Senozhatsky 1705bd6a68 parisc64: Add .opd based function descriptor dereference
We are moving towards separate kernel and module function descriptor
dereference callbacks. This patch enables it for parisc64.

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/20171109234830.5067-5-sergey.senozhatsky@gmail.com
To: Tony Luck <tony.luck@intel.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: Helge Deller <deller@gmx.de> #parisc64
Signed-off-by: Petr Mladek <pmladek@suse.com>
2018-01-09 10:45:38 +01:00

173 lines
3.5 KiB
ArmAsm

/* SPDX-License-Identifier: GPL-2.0 */
/* Kernel link layout for various "sections"
*
* Copyright (C) 1999-2003 Matthew Wilcox <willy at parisc-linux.org>
* Copyright (C) 2000-2003 Paul Bame <bame at parisc-linux.org>
* Copyright (C) 2000 John Marvin <jsm at parisc-linux.org>
* Copyright (C) 2000 Michael Ang <mang with subcarrier.org>
* Copyright (C) 2002 Randolph Chung <tausq with parisc-linux.org>
* Copyright (C) 2003 James Bottomley <jejb with parisc-linux.org>
* Copyright (C) 2006-2013 Helge Deller <deller@gmx.de>
*/
/*
* Put page table entries (swapper_pg_dir) as the first thing in .bss. This
* will ensure that it has .bss alignment (PAGE_SIZE).
*/
#define BSS_FIRST_SECTIONS *(.data..vm0.pmd) \
*(.data..vm0.pgd) \
*(.data..vm0.pte)
#include <asm-generic/vmlinux.lds.h>
/* needed for the processor specific cache alignment size */
#include <asm/cache.h>
#include <asm/page.h>
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
/* ld script to make hppa Linux kernel */
#ifndef CONFIG_64BIT
OUTPUT_FORMAT("elf32-hppa-linux")
OUTPUT_ARCH(hppa)
#else
OUTPUT_FORMAT("elf64-hppa-linux")
OUTPUT_ARCH(hppa:hppa2.0w)
#endif
ENTRY(parisc_kernel_start)
#ifndef CONFIG_64BIT
jiffies = jiffies_64 + 4;
#else
jiffies = jiffies_64;
#endif
SECTIONS
{
. = KERNEL_BINARY_TEXT_START;
__init_begin = .;
HEAD_TEXT_SECTION
INIT_TEXT_SECTION(8)
. = ALIGN(PAGE_SIZE);
INIT_DATA_SECTION(PAGE_SIZE)
/* we have to discard exit text and such at runtime, not link time */
.exit.text :
{
EXIT_TEXT
}
.exit.data :
{
EXIT_DATA
}
PERCPU_SECTION(8)
. = ALIGN(HUGEPAGE_SIZE);
__init_end = .;
/* freed after init ends here */
_text = .; /* Text and read-only data */
_stext = .;
.text ALIGN(PAGE_SIZE) : {
TEXT_TEXT
SCHED_TEXT
CPUIDLE_TEXT
LOCK_TEXT
KPROBES_TEXT
IRQENTRY_TEXT
SOFTIRQENTRY_TEXT
*(.text.do_softirq)
*(.text.sys_exit)
*(.text.do_sigaltstack)
*(.text.do_fork)
*(.text.div)
*($$*) /* millicode routines */
*(.text.*)
*(.fixup)
*(.lock.text) /* out-of-line lock text */
*(.gnu.warning)
}
. = ALIGN(PAGE_SIZE);
_etext = .;
/* End of text section */
/* Start of data section */
_sdata = .;
/* Architecturally we need to keep __gp below 0x1000000 and thus
* in front of RO_DATA_SECTION() which stores lots of tracepoint
* and ftrace symbols. */
#ifdef CONFIG_64BIT
. = ALIGN(16);
/* Linkage tables */
.opd : {
__start_opd = .;
*(.opd)
__end_opd = .;
} PROVIDE (__gp = .);
.plt : {
*(.plt)
}
.dlt : {
*(.dlt)
}
#endif
RO_DATA_SECTION(8)
/* RO because of BUILDTIME_EXTABLE_SORT */
EXCEPTION_TABLE(8)
NOTES
/* unwind info */
.PARISC.unwind : {
__start___unwind = .;
*(.PARISC.unwind)
__stop___unwind = .;
}
/* writeable */
/* Make sure this is page aligned so
* that we can properly leave these
* as writable
*/
. = ALIGN(HUGEPAGE_SIZE);
data_start = .;
/* Data */
RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, PAGE_SIZE)
/* PA-RISC locks requires 16-byte alignment */
. = ALIGN(16);
.data..lock_aligned : {
*(.data..lock_aligned)
}
/* End of data section */
_edata = .;
/* BSS */
BSS_SECTION(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE)
. = ALIGN(HUGEPAGE_SIZE);
_end = . ;
STABS_DEBUG
.note 0 : { *(.note) }
/* Sections to be discarded */
DISCARDS
/DISCARD/ : {
#ifdef CONFIG_64BIT
/* temporary hack until binutils is fixed to not emit these
* for static binaries
*/
*(.interp)
*(.dynsym)
*(.dynstr)
*(.dynamic)
*(.hash)
*(.gnu.hash)
#endif
}
}