arch/arm/kernel/asm-offsets.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 1995-2003 Russell King
   4  *               2001-2002 Keith Owens
   5  *
   6  * Generate definitions needed by assembly language modules.
   7  * This code generates raw asm output which is post-processed to extract
   8  * and format the required data.
   9  */
  10 #include <linux/compiler.h>
  11 #include <linux/sched.h>
  12 #include <linux/mm.h>
  13 #include <linux/dma-mapping.h>
  14 #ifdef CONFIG_KVM_ARM_HOST
  15 #include <linux/kvm_host.h>
  16 #endif
  17 #include <asm/cacheflush.h>
  18 #include <asm/glue-df.h>
  19 #include <asm/glue-pf.h>
  20 #include <asm/mach/arch.h>
  21 #include <asm/thread_info.h>
  22 #include <asm/memory.h>
  23 #include <asm/mpu.h>
  24 #include <asm/procinfo.h>
  25 #include <asm/suspend.h>
  26 #include <asm/vdso_datapage.h>
  27 #include <asm/hardware/cache-l2x0.h>
  28 #include <linux/kbuild.h>
  29 #include "signal.h"
  30
  31 /*
  32  * Make sure that the compiler and target are compatible.
  33  */
  34 #if defined(__APCS_26__)
  35 #error Sorry, your compiler targets APCS-26 but this kernel requires APCS-32
  36 #endif
  37 /*
  38  * GCC 4.8.0-4.8.2: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854
  39  *            miscompiles find_get_entry(), and can result in EXT3 and EXT4
  40  *            filesystem corruption (possibly other FS too).
  41  */
  42 #if defined(GCC_VERSION) && GCC_VERSION >= 40800 && GCC_VERSION < 40803
  43 #error Your compiler is too buggy; it is known to miscompile kernels
  44 #error and result in filesystem corruption and oopses.
  45 #endif
  46
  47 int main(void)
  48 {
  49   DEFINE(TSK_ACTIVE_MM,         offsetof(struct task_struct, active_mm));
  50 #ifdef CONFIG_STACKPROTECTOR
  51   DEFINE(TSK_STACK_CANARY,      offsetof(struct task_struct, stack_canary));
  52 #endif
  53   BLANK();
  54   DEFINE(TI_FLAGS,              offsetof(struct thread_info, flags));
  55   DEFINE(TI_PREEMPT,            offsetof(struct thread_info, preempt_count));
  56   DEFINE(TI_ADDR_LIMIT,         offsetof(struct thread_info, addr_limit));
  57   DEFINE(TI_TASK,               offsetof(struct thread_info, task));
  58   DEFINE(TI_CPU,                offsetof(struct thread_info, cpu));
  59   DEFINE(TI_CPU_DOMAIN,         offsetof(struct thread_info, cpu_domain));
  60   DEFINE(TI_CPU_SAVE,           offsetof(struct thread_info, cpu_context));
  61   DEFINE(TI_USED_CP,            offsetof(struct thread_info, used_cp));
  62   DEFINE(TI_TP_VALUE,           offsetof(struct thread_info, tp_value));
  63   DEFINE(TI_FPSTATE,            offsetof(struct thread_info, fpstate));
  64 #ifdef CONFIG_VFP
  65   DEFINE(TI_VFPSTATE,           offsetof(struct thread_info, vfpstate));
  66 #ifdef CONFIG_SMP
  67   DEFINE(VFP_CPU,               offsetof(union vfp_state, hard.cpu));
  68 #endif
  69 #endif
  70 #ifdef CONFIG_ARM_THUMBEE
  71   DEFINE(TI_THUMBEE_STATE,      offsetof(struct thread_info, thumbee_state));
  72 #endif
  73 #ifdef CONFIG_IWMMXT
  74   DEFINE(TI_IWMMXT_STATE,       offsetof(struct thread_info, fpstate.iwmmxt));
  75 #endif
  76 #ifdef CONFIG_CRUNCH
  77   DEFINE(TI_CRUNCH_STATE,       offsetof(struct thread_info, crunchstate));
  78 #endif
  79 #ifdef CONFIG_STACKPROTECTOR_PER_TASK
  80   DEFINE(TI_STACK_CANARY,       offsetof(struct thread_info, stack_canary));
  81 #endif
  82   DEFINE(THREAD_SZ_ORDER,       THREAD_SIZE_ORDER);
  83   BLANK();
  84   DEFINE(S_R0,                  offsetof(struct pt_regs, ARM_r0));
  85   DEFINE(S_R1,                  offsetof(struct pt_regs, ARM_r1));
  86   DEFINE(S_R2,                  offsetof(struct pt_regs, ARM_r2));
  87   DEFINE(S_R3,                  offsetof(struct pt_regs, ARM_r3));
  88   DEFINE(S_R4,                  offsetof(struct pt_regs, ARM_r4));
  89   DEFINE(S_R5,                  offsetof(struct pt_regs, ARM_r5));
  90   DEFINE(S_R6,                  offsetof(struct pt_regs, ARM_r6));
  91   DEFINE(S_R7,                  offsetof(struct pt_regs, ARM_r7));
  92   DEFINE(S_R8,                  offsetof(struct pt_regs, ARM_r8));
  93   DEFINE(S_R9,                  offsetof(struct pt_regs, ARM_r9));
  94   DEFINE(S_R10,                 offsetof(struct pt_regs, ARM_r10));
  95   DEFINE(S_FP,                  offsetof(struct pt_regs, ARM_fp));
  96   DEFINE(S_IP,                  offsetof(struct pt_regs, ARM_ip));
  97   DEFINE(S_SP,                  offsetof(struct pt_regs, ARM_sp));
  98   DEFINE(S_LR,                  offsetof(struct pt_regs, ARM_lr));
  99   DEFINE(S_PC,                  offsetof(struct pt_regs, ARM_pc));
 100   DEFINE(S_PSR,                 offsetof(struct pt_regs, ARM_cpsr));
 101   DEFINE(S_OLD_R0,              offsetof(struct pt_regs, ARM_ORIG_r0));
 102   DEFINE(PT_REGS_SIZE,          sizeof(struct pt_regs));
 103   DEFINE(SVC_DACR,              offsetof(struct svc_pt_regs, dacr));
 104   DEFINE(SVC_ADDR_LIMIT,        offsetof(struct svc_pt_regs, addr_limit));
 105   DEFINE(SVC_REGS_SIZE,         sizeof(struct svc_pt_regs));
 106   BLANK();
 107   DEFINE(SIGFRAME_RC3_OFFSET,   offsetof(struct sigframe, retcode[3]));
 108   DEFINE(RT_SIGFRAME_RC3_OFFSET, offsetof(struct rt_sigframe, sig.retcode[3]));
 109   BLANK();
 110 #ifdef CONFIG_CACHE_L2X0
 111   DEFINE(L2X0_R_PHY_BASE,       offsetof(struct l2x0_regs, phy_base));
 112   DEFINE(L2X0_R_AUX_CTRL,       offsetof(struct l2x0_regs, aux_ctrl));
 113   DEFINE(L2X0_R_TAG_LATENCY,    offsetof(struct l2x0_regs, tag_latency));
 114   DEFINE(L2X0_R_DATA_LATENCY,   offsetof(struct l2x0_regs, data_latency));
 115   DEFINE(L2X0_R_FILTER_START,   offsetof(struct l2x0_regs, filter_start));
 116   DEFINE(L2X0_R_FILTER_END,     offsetof(struct l2x0_regs, filter_end));
 117   DEFINE(L2X0_R_PREFETCH_CTRL,  offsetof(struct l2x0_regs, prefetch_ctrl));
 118   DEFINE(L2X0_R_PWR_CTRL,       offsetof(struct l2x0_regs, pwr_ctrl));
 119   BLANK();
 120 #endif
 121 #ifdef CONFIG_CPU_HAS_ASID
 122   DEFINE(MM_CONTEXT_ID,         offsetof(struct mm_struct, context.id.counter));
 123   BLANK();
 124 #endif
 125   DEFINE(VMA_VM_MM,             offsetof(struct vm_area_struct, vm_mm));
 126   DEFINE(VMA_VM_FLAGS,          offsetof(struct vm_area_struct, vm_flags));
 127   BLANK();
 128   DEFINE(VM_EXEC,               VM_EXEC);
 129   BLANK();
 130   DEFINE(PAGE_SZ,               PAGE_SIZE);
 131   BLANK();
 132   DEFINE(SYS_ERROR0,            0x9f0000);
 133   BLANK();
 134   DEFINE(SIZEOF_MACHINE_DESC,   sizeof(struct machine_desc));
 135   DEFINE(MACHINFO_TYPE,         offsetof(struct machine_desc, nr));
 136   DEFINE(MACHINFO_NAME,         offsetof(struct machine_desc, name));
 137   BLANK();
 138   DEFINE(PROC_INFO_SZ,          sizeof(struct proc_info_list));
 139   DEFINE(PROCINFO_INITFUNC,     offsetof(struct proc_info_list, __cpu_flush));
 140   DEFINE(PROCINFO_MM_MMUFLAGS,  offsetof(struct proc_info_list, __cpu_mm_mmu_flags));
 141   DEFINE(PROCINFO_IO_MMUFLAGS,  offsetof(struct proc_info_list, __cpu_io_mmu_flags));
 142   BLANK();
 143 #ifdef MULTI_DABORT
 144   DEFINE(PROCESSOR_DABT_FUNC,   offsetof(struct processor, _data_abort));
 145 #endif
 146 #ifdef MULTI_PABORT
 147   DEFINE(PROCESSOR_PABT_FUNC,   offsetof(struct processor, _prefetch_abort));
 148 #endif
 149 #ifdef MULTI_CPU
 150   DEFINE(CPU_SLEEP_SIZE,        offsetof(struct processor, suspend_size));
 151   DEFINE(CPU_DO_SUSPEND,        offsetof(struct processor, do_suspend));
 152   DEFINE(CPU_DO_RESUME,         offsetof(struct processor, do_resume));
 153 #endif
 154 #ifdef MULTI_CACHE
 155   DEFINE(CACHE_FLUSH_KERN_ALL,  offsetof(struct cpu_cache_fns, flush_kern_all));
 156 #endif
 157 #ifdef CONFIG_ARM_CPU_SUSPEND
 158   DEFINE(SLEEP_SAVE_SP_SZ,      sizeof(struct sleep_save_sp));
 159   DEFINE(SLEEP_SAVE_SP_PHYS,    offsetof(struct sleep_save_sp, save_ptr_stash_phys));
 160   DEFINE(SLEEP_SAVE_SP_VIRT,    offsetof(struct sleep_save_sp, save_ptr_stash));
 161 #endif
 162   BLANK();
 163   DEFINE(DMA_BIDIRECTIONAL,     DMA_BIDIRECTIONAL);
 164   DEFINE(DMA_TO_DEVICE,         DMA_TO_DEVICE);
 165   DEFINE(DMA_FROM_DEVICE,       DMA_FROM_DEVICE);
 166   BLANK();
 167   DEFINE(CACHE_WRITEBACK_ORDER, __CACHE_WRITEBACK_ORDER);
 168   DEFINE(CACHE_WRITEBACK_GRANULE, __CACHE_WRITEBACK_GRANULE);
 169   BLANK();
 170 #ifdef CONFIG_KVM_ARM_HOST
 171   DEFINE(VCPU_GUEST_CTXT,       offsetof(struct kvm_vcpu, arch.ctxt));
 172   DEFINE(VCPU_HOST_CTXT,        offsetof(struct kvm_vcpu, arch.host_cpu_context));
 173   DEFINE(CPU_CTXT_VFP,          offsetof(struct kvm_cpu_context, vfp));
 174   DEFINE(CPU_CTXT_GP_REGS,      offsetof(struct kvm_cpu_context, gp_regs));
 175   DEFINE(GP_REGS_USR,           offsetof(struct kvm_regs, usr_regs));
 176 #endif
 177   BLANK();
 178 #ifdef CONFIG_VDSO
 179   DEFINE(VDSO_DATA_SIZE,        sizeof(union vdso_data_store));
 180 #endif
 181   BLANK();
 182 #ifdef CONFIG_ARM_MPU
 183   DEFINE(MPU_RNG_INFO_RNGS,     offsetof(struct mpu_rgn_info, rgns));
 184   DEFINE(MPU_RNG_INFO_USED,     offsetof(struct mpu_rgn_info, used));
 185
 186   DEFINE(MPU_RNG_SIZE,          sizeof(struct mpu_rgn));
 187   DEFINE(MPU_RGN_DRBAR, offsetof(struct mpu_rgn, drbar));
 188   DEFINE(MPU_RGN_DRSR,  offsetof(struct mpu_rgn, drsr));
 189   DEFINE(MPU_RGN_DRACR, offsetof(struct mpu_rgn, dracr));
 190   DEFINE(MPU_RGN_PRBAR, offsetof(struct mpu_rgn, prbar));
 191   DEFINE(MPU_RGN_PRLAR, offsetof(struct mpu_rgn, prlar));
 192 #endif
 193   return 0;
 194 }