arch/arm/kernel/asm-offsets.c

   1 /*
   2  * Copyright (C) 1995-2003 Russell King
   3  *               2001-2002 Keith Owens
   4  *
   5  * Generate definitions needed by assembly language modules.
   6  * This code generates raw asm output which is post-processed to extract
   7  * and format the required data.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13 #include <linux/compiler.h>
  14 #include <linux/sched.h>
  15 #include <linux/mm.h>
  16 #include <linux/dma-mapping.h>
  17 #ifdef CONFIG_KVM_ARM_HOST
  18 #include <linux/kvm_host.h>
  19 #endif
  20 #include <asm/cacheflush.h>
  21 #include <asm/glue-df.h>
  22 #include <asm/glue-pf.h>
  23 #include <asm/mach/arch.h>
  24 #include <asm/thread_info.h>
  25 #include <asm/memory.h>
  26 #include <asm/procinfo.h>
  27 #include <asm/suspend.h>
  28 #include <asm/vdso_datapage.h>
  29 #include <asm/hardware/cache-l2x0.h>
  30 #include <linux/kbuild.h>
  31
  32 /*
  33  * Make sure that the compiler and target are compatible.
  34  */
  35 #if defined(__APCS_26__)
  36 #error Sorry, your compiler targets APCS-26 but this kernel requires APCS-32
  37 #endif
  38 /*
  39  * GCC 3.0, 3.1: general bad code generation.
  40  * GCC 3.2.0: incorrect function argument offset calculation.
  41  * GCC 3.2.x: miscompiles NEW_AUX_ENT in fs/binfmt_elf.c
  42  *            (http://gcc.gnu.org/PR8896) and incorrect structure
  43  *            initialisation in fs/jffs2/erase.c
  44  * GCC 4.8.0-4.8.2: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854
  45  *            miscompiles find_get_entry(), and can result in EXT3 and EXT4
  46  *            filesystem corruption (possibly other FS too).
  47  */
  48 #ifdef __GNUC__
  49 #if (__GNUC__ == 3 && __GNUC_MINOR__ < 3)
  50 #error Your compiler is too buggy; it is known to miscompile kernels.
  51 #error    Known good compilers: 3.3, 4.x
  52 #endif
  53 #if GCC_VERSION >= 40800 && GCC_VERSION < 40803
  54 #error Your compiler is too buggy; it is known to miscompile kernels
  55 #error and result in filesystem corruption and oopses.
  56 #endif
  57 #endif
  58
  59 int main(void)
  60 {
  61   DEFINE(TSK_ACTIVE_MM,         offsetof(struct task_struct, active_mm));
  62 #ifdef CONFIG_CC_STACKPROTECTOR
  63   DEFINE(TSK_STACK_CANARY,      offsetof(struct task_struct, stack_canary));
  64 #endif
  65   BLANK();
  66   DEFINE(TI_FLAGS,              offsetof(struct thread_info, flags));
  67   DEFINE(TI_PREEMPT,            offsetof(struct thread_info, preempt_count));
  68   DEFINE(TI_ADDR_LIMIT,         offsetof(struct thread_info, addr_limit));
  69   DEFINE(TI_TASK,               offsetof(struct thread_info, task));
  70   DEFINE(TI_CPU,                offsetof(struct thread_info, cpu));
  71   DEFINE(TI_CPU_DOMAIN,         offsetof(struct thread_info, cpu_domain));
  72   DEFINE(TI_CPU_SAVE,           offsetof(struct thread_info, cpu_context));
  73   DEFINE(TI_USED_CP,            offsetof(struct thread_info, used_cp));
  74   DEFINE(TI_TP_VALUE,           offsetof(struct thread_info, tp_value));
  75   DEFINE(TI_FPSTATE,            offsetof(struct thread_info, fpstate));
  76 #ifdef CONFIG_VFP
  77   DEFINE(TI_VFPSTATE,           offsetof(struct thread_info, vfpstate));
  78 #ifdef CONFIG_SMP
  79   DEFINE(VFP_CPU,               offsetof(union vfp_state, hard.cpu));
  80 #endif
  81 #endif
  82 #ifdef CONFIG_ARM_THUMBEE
  83   DEFINE(TI_THUMBEE_STATE,      offsetof(struct thread_info, thumbee_state));
  84 #endif
  85 #ifdef CONFIG_IWMMXT
  86   DEFINE(TI_IWMMXT_STATE,       offsetof(struct thread_info, fpstate.iwmmxt));
  87 #endif
  88 #ifdef CONFIG_CRUNCH
  89   DEFINE(TI_CRUNCH_STATE,       offsetof(struct thread_info, crunchstate));
  90 #endif
  91   BLANK();
  92   DEFINE(S_R0,                  offsetof(struct pt_regs, ARM_r0));
  93   DEFINE(S_R1,                  offsetof(struct pt_regs, ARM_r1));
  94   DEFINE(S_R2,                  offsetof(struct pt_regs, ARM_r2));
  95   DEFINE(S_R3,                  offsetof(struct pt_regs, ARM_r3));
  96   DEFINE(S_R4,                  offsetof(struct pt_regs, ARM_r4));
  97   DEFINE(S_R5,                  offsetof(struct pt_regs, ARM_r5));
  98   DEFINE(S_R6,                  offsetof(struct pt_regs, ARM_r6));
  99   DEFINE(S_R7,                  offsetof(struct pt_regs, ARM_r7));
 100   DEFINE(S_R8,                  offsetof(struct pt_regs, ARM_r8));
 101   DEFINE(S_R9,                  offsetof(struct pt_regs, ARM_r9));
 102   DEFINE(S_R10,                 offsetof(struct pt_regs, ARM_r10));
 103   DEFINE(S_FP,                  offsetof(struct pt_regs, ARM_fp));
 104   DEFINE(S_IP,                  offsetof(struct pt_regs, ARM_ip));
 105   DEFINE(S_SP,                  offsetof(struct pt_regs, ARM_sp));
 106   DEFINE(S_LR,                  offsetof(struct pt_regs, ARM_lr));
 107   DEFINE(S_PC,                  offsetof(struct pt_regs, ARM_pc));
 108   DEFINE(S_PSR,                 offsetof(struct pt_regs, ARM_cpsr));
 109   DEFINE(S_OLD_R0,              offsetof(struct pt_regs, ARM_ORIG_r0));
 110   DEFINE(PT_REGS_SIZE,          sizeof(struct pt_regs));
 111   DEFINE(SVC_DACR,              offsetof(struct svc_pt_regs, dacr));
 112   DEFINE(SVC_ADDR_LIMIT,        offsetof(struct svc_pt_regs, addr_limit));
 113   DEFINE(SVC_REGS_SIZE,         sizeof(struct svc_pt_regs));
 114   BLANK();
 115 #ifdef CONFIG_CACHE_L2X0
 116   DEFINE(L2X0_R_PHY_BASE,       offsetof(struct l2x0_regs, phy_base));
 117   DEFINE(L2X0_R_AUX_CTRL,       offsetof(struct l2x0_regs, aux_ctrl));
 118   DEFINE(L2X0_R_TAG_LATENCY,    offsetof(struct l2x0_regs, tag_latency));
 119   DEFINE(L2X0_R_DATA_LATENCY,   offsetof(struct l2x0_regs, data_latency));
 120   DEFINE(L2X0_R_FILTER_START,   offsetof(struct l2x0_regs, filter_start));
 121   DEFINE(L2X0_R_FILTER_END,     offsetof(struct l2x0_regs, filter_end));
 122   DEFINE(L2X0_R_PREFETCH_CTRL,  offsetof(struct l2x0_regs, prefetch_ctrl));
 123   DEFINE(L2X0_R_PWR_CTRL,       offsetof(struct l2x0_regs, pwr_ctrl));
 124   BLANK();
 125 #endif
 126 #ifdef CONFIG_CPU_HAS_ASID
 127   DEFINE(MM_CONTEXT_ID,         offsetof(struct mm_struct, context.id.counter));
 128   BLANK();
 129 #endif
 130   DEFINE(VMA_VM_MM,             offsetof(struct vm_area_struct, vm_mm));
 131   DEFINE(VMA_VM_FLAGS,          offsetof(struct vm_area_struct, vm_flags));
 132   BLANK();
 133   DEFINE(VM_EXEC,               VM_EXEC);
 134   BLANK();
 135   DEFINE(PAGE_SZ,               PAGE_SIZE);
 136   BLANK();
 137   DEFINE(SYS_ERROR0,            0x9f0000);
 138   BLANK();
 139   DEFINE(SIZEOF_MACHINE_DESC,   sizeof(struct machine_desc));
 140   DEFINE(MACHINFO_TYPE,         offsetof(struct machine_desc, nr));
 141   DEFINE(MACHINFO_NAME,         offsetof(struct machine_desc, name));
 142   BLANK();
 143   DEFINE(PROC_INFO_SZ,          sizeof(struct proc_info_list));
 144   DEFINE(PROCINFO_INITFUNC,     offsetof(struct proc_info_list, __cpu_flush));
 145   DEFINE(PROCINFO_MM_MMUFLAGS,  offsetof(struct proc_info_list, __cpu_mm_mmu_flags));
 146   DEFINE(PROCINFO_IO_MMUFLAGS,  offsetof(struct proc_info_list, __cpu_io_mmu_flags));
 147   BLANK();
 148 #ifdef MULTI_DABORT
 149   DEFINE(PROCESSOR_DABT_FUNC,   offsetof(struct processor, _data_abort));
 150 #endif
 151 #ifdef MULTI_PABORT
 152   DEFINE(PROCESSOR_PABT_FUNC,   offsetof(struct processor, _prefetch_abort));
 153 #endif
 154 #ifdef MULTI_CPU
 155   DEFINE(CPU_SLEEP_SIZE,        offsetof(struct processor, suspend_size));
 156   DEFINE(CPU_DO_SUSPEND,        offsetof(struct processor, do_suspend));
 157   DEFINE(CPU_DO_RESUME,         offsetof(struct processor, do_resume));
 158 #endif
 159 #ifdef MULTI_CACHE
 160   DEFINE(CACHE_FLUSH_KERN_ALL,  offsetof(struct cpu_cache_fns, flush_kern_all));
 161 #endif
 162 #ifdef CONFIG_ARM_CPU_SUSPEND
 163   DEFINE(SLEEP_SAVE_SP_SZ,      sizeof(struct sleep_save_sp));
 164   DEFINE(SLEEP_SAVE_SP_PHYS,    offsetof(struct sleep_save_sp, save_ptr_stash_phys));
 165   DEFINE(SLEEP_SAVE_SP_VIRT,    offsetof(struct sleep_save_sp, save_ptr_stash));
 166 #endif
 167   BLANK();
 168   DEFINE(DMA_BIDIRECTIONAL,     DMA_BIDIRECTIONAL);
 169   DEFINE(DMA_TO_DEVICE,         DMA_TO_DEVICE);
 170   DEFINE(DMA_FROM_DEVICE,       DMA_FROM_DEVICE);
 171   BLANK();
 172   DEFINE(CACHE_WRITEBACK_ORDER, __CACHE_WRITEBACK_ORDER);
 173   DEFINE(CACHE_WRITEBACK_GRANULE, __CACHE_WRITEBACK_GRANULE);
 174   BLANK();
 175 #ifdef CONFIG_KVM_ARM_HOST
 176   DEFINE(VCPU_GUEST_CTXT,       offsetof(struct kvm_vcpu, arch.ctxt));
 177   DEFINE(VCPU_HOST_CTXT,        offsetof(struct kvm_vcpu, arch.host_cpu_context));
 178   DEFINE(CPU_CTXT_VFP,          offsetof(struct kvm_cpu_context, vfp));
 179   DEFINE(CPU_CTXT_GP_REGS,      offsetof(struct kvm_cpu_context, gp_regs));
 180   DEFINE(GP_REGS_USR,           offsetof(struct kvm_regs, usr_regs));
 181 #endif
 182   BLANK();
 183 #ifdef CONFIG_VDSO
 184   DEFINE(VDSO_DATA_SIZE,        sizeof(union vdso_data_store));
 185 #endif
 186   return 0;
 187 }