mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 01:35:35 +07:00
8ad8b72721
This patch ports the feature Kernel Address SANitizer (KASAN). Note: The start address of shadow memory is at the beginning of kernel space, which is 2^64 - (2^39 / 2) in SV39. The size of the kernel space is 2^38 bytes so the size of shadow memory should be 2^38 / 8. Thus, the shadow memory would not overlap with the fixmap area. There are currently two limitations in this port, 1. RV64 only: KASAN need large address space for extra shadow memory region. 2. KASAN can't debug the modules since the modules are allocated in VMALLOC area. We mapped the shadow memory, which corresponding to VMALLOC area, to the kasan_early_shadow_page because we don't have enough physical space for all the shadow memory corresponding to VMALLOC area. Signed-off-by: Nick Hu <nickhu@andestech.com> Reported-by: Greentime Hu <green.hu@gmail.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
85 lines
1.3 KiB
ArmAsm
85 lines
1.3 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2012 Regents of the University of California
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* Copyright (C) 2017 SiFive
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*/
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#define LOAD_OFFSET PAGE_OFFSET
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#include <asm/vmlinux.lds.h>
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#include <asm/page.h>
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#include <asm/cache.h>
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#include <asm/thread_info.h>
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OUTPUT_ARCH(riscv)
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ENTRY(_start)
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jiffies = jiffies_64;
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SECTIONS
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{
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/* Beginning of code and text segment */
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. = LOAD_OFFSET;
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_start = .;
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__init_begin = .;
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HEAD_TEXT_SECTION
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INIT_TEXT_SECTION(PAGE_SIZE)
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INIT_DATA_SECTION(16)
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/* we have to discard exit text and such at runtime, not link time */
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.exit.text :
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{
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EXIT_TEXT
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}
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.exit.data :
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{
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EXIT_DATA
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}
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PERCPU_SECTION(L1_CACHE_BYTES)
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__init_end = .;
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.text : {
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_text = .;
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_stext = .;
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TEXT_TEXT
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SCHED_TEXT
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CPUIDLE_TEXT
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LOCK_TEXT
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KPROBES_TEXT
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ENTRY_TEXT
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IRQENTRY_TEXT
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SOFTIRQENTRY_TEXT
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*(.fixup)
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_etext = .;
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}
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/* Start of data section */
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_sdata = .;
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RO_DATA(L1_CACHE_BYTES)
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.srodata : {
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*(.srodata*)
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}
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RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)
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.sdata : {
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__global_pointer$ = . + 0x800;
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*(.sdata*)
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/* End of data section */
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_edata = .;
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*(.sbss*)
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}
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BSS_SECTION(PAGE_SIZE, PAGE_SIZE, 0)
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EXCEPTION_TABLE(0x10)
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.rel.dyn : {
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*(.rel.dyn*)
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}
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_end = .;
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STABS_DEBUG
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DWARF_DEBUG
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DISCARDS
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}
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