mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
189af46571
On ARM, we currently only change the value of the stack canary when switching tasks if the kernel was built for UP. On SMP kernels, this is impossible since the stack canary value is obtained via a global symbol reference, which means a) all running tasks on all CPUs must use the same value b) we can only modify the value when no kernel stack frames are live on any CPU, which is effectively never. So instead, use a GCC plugin to add a RTL pass that replaces each reference to the address of the __stack_chk_guard symbol with an expression that produces the address of the 'stack_canary' field that is added to struct thread_info. This way, each task will use its own randomized value. Cc: Russell King <linux@armlinux.org.uk> Cc: Kees Cook <keescook@chromium.org> Cc: Emese Revfy <re.emese@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Laura Abbott <labbott@redhat.com> Cc: kernel-hardening@lists.openwall.com Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Kees Cook <keescook@chromium.org>
198 lines
7.8 KiB
C
198 lines
7.8 KiB
C
/*
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* Copyright (C) 1995-2003 Russell King
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* 2001-2002 Keith Owens
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*
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* Generate definitions needed by assembly language modules.
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* This code generates raw asm output which is post-processed to extract
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* and format the required data.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/compiler.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/dma-mapping.h>
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#ifdef CONFIG_KVM_ARM_HOST
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#include <linux/kvm_host.h>
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#endif
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#include <asm/cacheflush.h>
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#include <asm/glue-df.h>
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#include <asm/glue-pf.h>
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#include <asm/mach/arch.h>
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#include <asm/thread_info.h>
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#include <asm/memory.h>
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#include <asm/mpu.h>
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#include <asm/procinfo.h>
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#include <asm/suspend.h>
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#include <asm/vdso_datapage.h>
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#include <asm/hardware/cache-l2x0.h>
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#include <linux/kbuild.h>
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#include "signal.h"
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/*
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* Make sure that the compiler and target are compatible.
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*/
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#if defined(__APCS_26__)
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#error Sorry, your compiler targets APCS-26 but this kernel requires APCS-32
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#endif
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/*
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* GCC 4.8.0-4.8.2: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854
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* miscompiles find_get_entry(), and can result in EXT3 and EXT4
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* filesystem corruption (possibly other FS too).
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*/
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#if defined(GCC_VERSION) && GCC_VERSION >= 40800 && GCC_VERSION < 40803
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#error Your compiler is too buggy; it is known to miscompile kernels
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#error and result in filesystem corruption and oopses.
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#endif
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int main(void)
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{
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DEFINE(TSK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
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#ifdef CONFIG_STACKPROTECTOR
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DEFINE(TSK_STACK_CANARY, offsetof(struct task_struct, stack_canary));
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#endif
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BLANK();
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DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
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DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
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DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit));
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DEFINE(TI_TASK, offsetof(struct thread_info, task));
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DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
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DEFINE(TI_CPU_DOMAIN, offsetof(struct thread_info, cpu_domain));
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DEFINE(TI_CPU_SAVE, offsetof(struct thread_info, cpu_context));
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DEFINE(TI_USED_CP, offsetof(struct thread_info, used_cp));
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DEFINE(TI_TP_VALUE, offsetof(struct thread_info, tp_value));
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DEFINE(TI_FPSTATE, offsetof(struct thread_info, fpstate));
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#ifdef CONFIG_VFP
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DEFINE(TI_VFPSTATE, offsetof(struct thread_info, vfpstate));
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#ifdef CONFIG_SMP
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DEFINE(VFP_CPU, offsetof(union vfp_state, hard.cpu));
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#endif
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#endif
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#ifdef CONFIG_ARM_THUMBEE
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DEFINE(TI_THUMBEE_STATE, offsetof(struct thread_info, thumbee_state));
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#endif
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#ifdef CONFIG_IWMMXT
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DEFINE(TI_IWMMXT_STATE, offsetof(struct thread_info, fpstate.iwmmxt));
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#endif
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#ifdef CONFIG_CRUNCH
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DEFINE(TI_CRUNCH_STATE, offsetof(struct thread_info, crunchstate));
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#endif
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#ifdef CONFIG_STACKPROTECTOR_PER_TASK
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DEFINE(TI_STACK_CANARY, offsetof(struct thread_info, stack_canary));
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#endif
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DEFINE(THREAD_SZ_ORDER, THREAD_SIZE_ORDER);
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BLANK();
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DEFINE(S_R0, offsetof(struct pt_regs, ARM_r0));
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DEFINE(S_R1, offsetof(struct pt_regs, ARM_r1));
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DEFINE(S_R2, offsetof(struct pt_regs, ARM_r2));
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DEFINE(S_R3, offsetof(struct pt_regs, ARM_r3));
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DEFINE(S_R4, offsetof(struct pt_regs, ARM_r4));
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DEFINE(S_R5, offsetof(struct pt_regs, ARM_r5));
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DEFINE(S_R6, offsetof(struct pt_regs, ARM_r6));
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DEFINE(S_R7, offsetof(struct pt_regs, ARM_r7));
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DEFINE(S_R8, offsetof(struct pt_regs, ARM_r8));
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DEFINE(S_R9, offsetof(struct pt_regs, ARM_r9));
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DEFINE(S_R10, offsetof(struct pt_regs, ARM_r10));
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DEFINE(S_FP, offsetof(struct pt_regs, ARM_fp));
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DEFINE(S_IP, offsetof(struct pt_regs, ARM_ip));
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DEFINE(S_SP, offsetof(struct pt_regs, ARM_sp));
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DEFINE(S_LR, offsetof(struct pt_regs, ARM_lr));
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DEFINE(S_PC, offsetof(struct pt_regs, ARM_pc));
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DEFINE(S_PSR, offsetof(struct pt_regs, ARM_cpsr));
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DEFINE(S_OLD_R0, offsetof(struct pt_regs, ARM_ORIG_r0));
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DEFINE(PT_REGS_SIZE, sizeof(struct pt_regs));
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DEFINE(SVC_DACR, offsetof(struct svc_pt_regs, dacr));
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DEFINE(SVC_ADDR_LIMIT, offsetof(struct svc_pt_regs, addr_limit));
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DEFINE(SVC_REGS_SIZE, sizeof(struct svc_pt_regs));
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BLANK();
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DEFINE(SIGFRAME_RC3_OFFSET, offsetof(struct sigframe, retcode[3]));
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DEFINE(RT_SIGFRAME_RC3_OFFSET, offsetof(struct rt_sigframe, sig.retcode[3]));
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BLANK();
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#ifdef CONFIG_CACHE_L2X0
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DEFINE(L2X0_R_PHY_BASE, offsetof(struct l2x0_regs, phy_base));
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DEFINE(L2X0_R_AUX_CTRL, offsetof(struct l2x0_regs, aux_ctrl));
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DEFINE(L2X0_R_TAG_LATENCY, offsetof(struct l2x0_regs, tag_latency));
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DEFINE(L2X0_R_DATA_LATENCY, offsetof(struct l2x0_regs, data_latency));
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DEFINE(L2X0_R_FILTER_START, offsetof(struct l2x0_regs, filter_start));
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DEFINE(L2X0_R_FILTER_END, offsetof(struct l2x0_regs, filter_end));
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DEFINE(L2X0_R_PREFETCH_CTRL, offsetof(struct l2x0_regs, prefetch_ctrl));
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DEFINE(L2X0_R_PWR_CTRL, offsetof(struct l2x0_regs, pwr_ctrl));
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BLANK();
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#endif
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#ifdef CONFIG_CPU_HAS_ASID
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DEFINE(MM_CONTEXT_ID, offsetof(struct mm_struct, context.id.counter));
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BLANK();
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#endif
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DEFINE(VMA_VM_MM, offsetof(struct vm_area_struct, vm_mm));
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DEFINE(VMA_VM_FLAGS, offsetof(struct vm_area_struct, vm_flags));
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BLANK();
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DEFINE(VM_EXEC, VM_EXEC);
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BLANK();
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DEFINE(PAGE_SZ, PAGE_SIZE);
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BLANK();
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DEFINE(SYS_ERROR0, 0x9f0000);
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BLANK();
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DEFINE(SIZEOF_MACHINE_DESC, sizeof(struct machine_desc));
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DEFINE(MACHINFO_TYPE, offsetof(struct machine_desc, nr));
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DEFINE(MACHINFO_NAME, offsetof(struct machine_desc, name));
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BLANK();
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DEFINE(PROC_INFO_SZ, sizeof(struct proc_info_list));
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DEFINE(PROCINFO_INITFUNC, offsetof(struct proc_info_list, __cpu_flush));
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DEFINE(PROCINFO_MM_MMUFLAGS, offsetof(struct proc_info_list, __cpu_mm_mmu_flags));
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DEFINE(PROCINFO_IO_MMUFLAGS, offsetof(struct proc_info_list, __cpu_io_mmu_flags));
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BLANK();
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#ifdef MULTI_DABORT
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DEFINE(PROCESSOR_DABT_FUNC, offsetof(struct processor, _data_abort));
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#endif
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#ifdef MULTI_PABORT
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DEFINE(PROCESSOR_PABT_FUNC, offsetof(struct processor, _prefetch_abort));
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#endif
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#ifdef MULTI_CPU
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DEFINE(CPU_SLEEP_SIZE, offsetof(struct processor, suspend_size));
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DEFINE(CPU_DO_SUSPEND, offsetof(struct processor, do_suspend));
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DEFINE(CPU_DO_RESUME, offsetof(struct processor, do_resume));
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#endif
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#ifdef MULTI_CACHE
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DEFINE(CACHE_FLUSH_KERN_ALL, offsetof(struct cpu_cache_fns, flush_kern_all));
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#endif
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#ifdef CONFIG_ARM_CPU_SUSPEND
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DEFINE(SLEEP_SAVE_SP_SZ, sizeof(struct sleep_save_sp));
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DEFINE(SLEEP_SAVE_SP_PHYS, offsetof(struct sleep_save_sp, save_ptr_stash_phys));
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DEFINE(SLEEP_SAVE_SP_VIRT, offsetof(struct sleep_save_sp, save_ptr_stash));
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#endif
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BLANK();
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DEFINE(DMA_BIDIRECTIONAL, DMA_BIDIRECTIONAL);
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DEFINE(DMA_TO_DEVICE, DMA_TO_DEVICE);
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DEFINE(DMA_FROM_DEVICE, DMA_FROM_DEVICE);
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BLANK();
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DEFINE(CACHE_WRITEBACK_ORDER, __CACHE_WRITEBACK_ORDER);
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DEFINE(CACHE_WRITEBACK_GRANULE, __CACHE_WRITEBACK_GRANULE);
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BLANK();
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#ifdef CONFIG_KVM_ARM_HOST
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DEFINE(VCPU_GUEST_CTXT, offsetof(struct kvm_vcpu, arch.ctxt));
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DEFINE(VCPU_HOST_CTXT, offsetof(struct kvm_vcpu, arch.host_cpu_context));
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DEFINE(CPU_CTXT_VFP, offsetof(struct kvm_cpu_context, vfp));
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DEFINE(CPU_CTXT_GP_REGS, offsetof(struct kvm_cpu_context, gp_regs));
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DEFINE(GP_REGS_USR, offsetof(struct kvm_regs, usr_regs));
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#endif
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BLANK();
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#ifdef CONFIG_VDSO
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DEFINE(VDSO_DATA_SIZE, sizeof(union vdso_data_store));
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#endif
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BLANK();
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#ifdef CONFIG_ARM_MPU
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DEFINE(MPU_RNG_INFO_RNGS, offsetof(struct mpu_rgn_info, rgns));
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DEFINE(MPU_RNG_INFO_USED, offsetof(struct mpu_rgn_info, used));
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DEFINE(MPU_RNG_SIZE, sizeof(struct mpu_rgn));
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DEFINE(MPU_RGN_DRBAR, offsetof(struct mpu_rgn, drbar));
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DEFINE(MPU_RGN_DRSR, offsetof(struct mpu_rgn, drsr));
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DEFINE(MPU_RGN_DRACR, offsetof(struct mpu_rgn, dracr));
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DEFINE(MPU_RGN_PRBAR, offsetof(struct mpu_rgn, prbar));
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DEFINE(MPU_RGN_PRLAR, offsetof(struct mpu_rgn, prlar));
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#endif
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return 0;
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}
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