linux/arch/arm/kernel/asm-offsets.c
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   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
  59int 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(S_FRAME_SIZE,          sizeof(struct pt_regs));
 111  BLANK();
 112#ifdef CONFIG_CACHE_L2X0
 113  DEFINE(L2X0_R_PHY_BASE,       offsetof(struct l2x0_regs, phy_base));
 114  DEFINE(L2X0_R_AUX_CTRL,       offsetof(struct l2x0_regs, aux_ctrl));
 115  DEFINE(L2X0_R_TAG_LATENCY,    offsetof(struct l2x0_regs, tag_latency));
 116  DEFINE(L2X0_R_DATA_LATENCY,   offsetof(struct l2x0_regs, data_latency));
 117  DEFINE(L2X0_R_FILTER_START,   offsetof(struct l2x0_regs, filter_start));
 118  DEFINE(L2X0_R_FILTER_END,     offsetof(struct l2x0_regs, filter_end));
 119  DEFINE(L2X0_R_PREFETCH_CTRL,  offsetof(struct l2x0_regs, prefetch_ctrl));
 120  DEFINE(L2X0_R_PWR_CTRL,       offsetof(struct l2x0_regs, pwr_ctrl));
 121  BLANK();
 122#endif
 123#ifdef CONFIG_CPU_HAS_ASID
 124  DEFINE(MM_CONTEXT_ID,         offsetof(struct mm_struct, context.id.counter));
 125  BLANK();
 126#endif
 127  DEFINE(VMA_VM_MM,             offsetof(struct vm_area_struct, vm_mm));
 128  DEFINE(VMA_VM_FLAGS,          offsetof(struct vm_area_struct, vm_flags));
 129  BLANK();
 130  DEFINE(VM_EXEC,               VM_EXEC);
 131  BLANK();
 132  DEFINE(PAGE_SZ,               PAGE_SIZE);
 133  BLANK();
 134  DEFINE(SYS_ERROR0,            0x9f0000);
 135  BLANK();
 136  DEFINE(SIZEOF_MACHINE_DESC,   sizeof(struct machine_desc));
 137  DEFINE(MACHINFO_TYPE,         offsetof(struct machine_desc, nr));
 138  DEFINE(MACHINFO_NAME,         offsetof(struct machine_desc, name));
 139  BLANK();
 140  DEFINE(PROC_INFO_SZ,          sizeof(struct proc_info_list));
 141  DEFINE(PROCINFO_INITFUNC,     offsetof(struct proc_info_list, __cpu_flush));
 142  DEFINE(PROCINFO_MM_MMUFLAGS,  offsetof(struct proc_info_list, __cpu_mm_mmu_flags));
 143  DEFINE(PROCINFO_IO_MMUFLAGS,  offsetof(struct proc_info_list, __cpu_io_mmu_flags));
 144  BLANK();
 145#ifdef MULTI_DABORT
 146  DEFINE(PROCESSOR_DABT_FUNC,   offsetof(struct processor, _data_abort));
 147#endif
 148#ifdef MULTI_PABORT
 149  DEFINE(PROCESSOR_PABT_FUNC,   offsetof(struct processor, _prefetch_abort));
 150#endif
 151#ifdef MULTI_CPU
 152  DEFINE(CPU_SLEEP_SIZE,        offsetof(struct processor, suspend_size));
 153  DEFINE(CPU_DO_SUSPEND,        offsetof(struct processor, do_suspend));
 154  DEFINE(CPU_DO_RESUME,         offsetof(struct processor, do_resume));
 155#endif
 156#ifdef MULTI_CACHE
 157  DEFINE(CACHE_FLUSH_KERN_ALL,  offsetof(struct cpu_cache_fns, flush_kern_all));
 158#endif
 159#ifdef CONFIG_ARM_CPU_SUSPEND
 160  DEFINE(SLEEP_SAVE_SP_SZ,      sizeof(struct sleep_save_sp));
 161  DEFINE(SLEEP_SAVE_SP_PHYS,    offsetof(struct sleep_save_sp, save_ptr_stash_phys));
 162  DEFINE(SLEEP_SAVE_SP_VIRT,    offsetof(struct sleep_save_sp, save_ptr_stash));
 163#endif
 164  BLANK();
 165  DEFINE(DMA_BIDIRECTIONAL,     DMA_BIDIRECTIONAL);
 166  DEFINE(DMA_TO_DEVICE,         DMA_TO_DEVICE);
 167  DEFINE(DMA_FROM_DEVICE,       DMA_FROM_DEVICE);
 168  BLANK();
 169  DEFINE(CACHE_WRITEBACK_ORDER, __CACHE_WRITEBACK_ORDER);
 170  DEFINE(CACHE_WRITEBACK_GRANULE, __CACHE_WRITEBACK_GRANULE);
 171  BLANK();
 172#ifdef CONFIG_KVM_ARM_HOST
 173  DEFINE(VCPU_GUEST_CTXT,       offsetof(struct kvm_vcpu, arch.ctxt));
 174  DEFINE(VCPU_HOST_CTXT,        offsetof(struct kvm_vcpu, arch.host_cpu_context));
 175  DEFINE(CPU_CTXT_VFP,          offsetof(struct kvm_cpu_context, vfp));
 176  DEFINE(CPU_CTXT_GP_REGS,      offsetof(struct kvm_cpu_context, gp_regs));
 177  DEFINE(GP_REGS_USR,           offsetof(struct kvm_regs, usr_regs));
 178#endif
 179  BLANK();
 180#ifdef CONFIG_VDSO
 181  DEFINE(VDSO_DATA_SIZE,        sizeof(union vdso_data_store));
 182#endif
 183  return 0; 
 184}
 185