arch/arm/kernel/asm-offsets.c

/*
 * Copyright (C) 1995-2003 Russell King
 *               2001-2002 Keith Owens
 *     
 * Generate definitions needed by assembly language modules.
 * This code generates raw asm output which is post-processed to extract
 * and format the required data.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/compiler.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/dma-mapping.h>
#ifdef CONFIG_KVM_ARM_HOST
#include <linux/kvm_host.h>
#endif
#include <asm/cacheflush.h>
#include <asm/glue-df.h>
#include <asm/glue-pf.h>
#include <asm/mach/arch.h>
#include <asm/thread_info.h>
#include <asm/memory.h>
#include <asm/procinfo.h>
#include <asm/suspend.h>
#include <asm/vdso_datapage.h>
#include <asm/hardware/cache-l2x0.h>
#include <linux/kbuild.h>

/*
 * Make sure that the compiler and target are compatible.
 */
#if defined(__APCS_26__)
#error Sorry, your compiler targets APCS-26 but this kernel requires APCS-32
#endif
/*
 * GCC 3.0, 3.1: general bad code generation.
 * GCC 3.2.0: incorrect function argument offset calculation.
 * GCC 3.2.x: miscompiles NEW_AUX_ENT in fs/binfmt_elf.c
 *            (http://gcc.gnu.org/PR8896) and incorrect structure
 *	      initialisation in fs/jffs2/erase.c
 * GCC 4.8.0-4.8.2: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854
 *	      miscompiles find_get_entry(), and can result in EXT3 and EXT4
 *	      filesystem corruption (possibly other FS too).
 */
#ifdef __GNUC__
#if (__GNUC__ == 3 && __GNUC_MINOR__ < 3)
#error Your compiler is too buggy; it is known to miscompile kernels.
#error    Known good compilers: 3.3, 4.x
#endif
#if GCC_VERSION >= 40800 && GCC_VERSION < 40803
#error Your compiler is too buggy; it is known to miscompile kernels
#error and result in filesystem corruption and oopses.
#endif
#endif

int main(void)
{
  DEFINE(TSK_ACTIVE_MM,		offsetof(struct task_struct, active_mm));
#ifdef CONFIG_CC_STACKPROTECTOR
  DEFINE(TSK_STACK_CANARY,	offsetof(struct task_struct, stack_canary));
#endif
  BLANK();
  DEFINE(TI_FLAGS,		offsetof(struct thread_info, flags));
  DEFINE(TI_PREEMPT,		offsetof(struct thread_info, preempt_count));
  DEFINE(TI_ADDR_LIMIT,		offsetof(struct thread_info, addr_limit));
  DEFINE(TI_TASK,		offsetof(struct thread_info, task));
  DEFINE(TI_CPU,		offsetof(struct thread_info, cpu));
  DEFINE(TI_CPU_DOMAIN,		offsetof(struct thread_info, cpu_domain));
  DEFINE(TI_CPU_SAVE,		offsetof(struct thread_info, cpu_context));
  DEFINE(TI_USED_CP,		offsetof(struct thread_info, used_cp));
  DEFINE(TI_TP_VALUE,		offsetof(struct thread_info, tp_value));
  DEFINE(TI_FPSTATE,		offsetof(struct thread_info, fpstate));
#ifdef CONFIG_VFP
  DEFINE(TI_VFPSTATE,		offsetof(struct thread_info, vfpstate));
#ifdef CONFIG_SMP
  DEFINE(VFP_CPU,		offsetof(union vfp_state, hard.cpu));
#endif
#endif
#ifdef CONFIG_ARM_THUMBEE
  DEFINE(TI_THUMBEE_STATE,	offsetof(struct thread_info, thumbee_state));
#endif
#ifdef CONFIG_IWMMXT
  DEFINE(TI_IWMMXT_STATE,	offsetof(struct thread_info, fpstate.iwmmxt));
#endif
#ifdef CONFIG_CRUNCH
  DEFINE(TI_CRUNCH_STATE,	offsetof(struct thread_info, crunchstate));
#endif
  BLANK();
  DEFINE(S_R0,			offsetof(struct pt_regs, ARM_r0));
  DEFINE(S_R1,			offsetof(struct pt_regs, ARM_r1));
  DEFINE(S_R2,			offsetof(struct pt_regs, ARM_r2));
  DEFINE(S_R3,			offsetof(struct pt_regs, ARM_r3));
  DEFINE(S_R4,			offsetof(struct pt_regs, ARM_r4));
  DEFINE(S_R5,			offsetof(struct pt_regs, ARM_r5));
  DEFINE(S_R6,			offsetof(struct pt_regs, ARM_r6));
  DEFINE(S_R7,			offsetof(struct pt_regs, ARM_r7));
  DEFINE(S_R8,			offsetof(struct pt_regs, ARM_r8));
  DEFINE(S_R9,			offsetof(struct pt_regs, ARM_r9));
  DEFINE(S_R10,			offsetof(struct pt_regs, ARM_r10));
  DEFINE(S_FP,			offsetof(struct pt_regs, ARM_fp));
  DEFINE(S_IP,			offsetof(struct pt_regs, ARM_ip));
  DEFINE(S_SP,			offsetof(struct pt_regs, ARM_sp));
  DEFINE(S_LR,			offsetof(struct pt_regs, ARM_lr));
  DEFINE(S_PC,			offsetof(struct pt_regs, ARM_pc));
  DEFINE(S_PSR,			offsetof(struct pt_regs, ARM_cpsr));
  DEFINE(S_OLD_R0,		offsetof(struct pt_regs, ARM_ORIG_r0));
  DEFINE(PT_REGS_SIZE,		sizeof(struct pt_regs));
  DEFINE(SVC_DACR,		offsetof(struct svc_pt_regs, dacr));
  DEFINE(SVC_ADDR_LIMIT,	offsetof(struct svc_pt_regs, addr_limit));
  DEFINE(SVC_REGS_SIZE,		sizeof(struct svc_pt_regs));
  BLANK();
#ifdef CONFIG_CACHE_L2X0
  DEFINE(L2X0_R_PHY_BASE,	offsetof(struct l2x0_regs, phy_base));
  DEFINE(L2X0_R_AUX_CTRL,	offsetof(struct l2x0_regs, aux_ctrl));
  DEFINE(L2X0_R_TAG_LATENCY,	offsetof(struct l2x0_regs, tag_latency));
  DEFINE(L2X0_R_DATA_LATENCY,	offsetof(struct l2x0_regs, data_latency));
  DEFINE(L2X0_R_FILTER_START,	offsetof(struct l2x0_regs, filter_start));
  DEFINE(L2X0_R_FILTER_END,	offsetof(struct l2x0_regs, filter_end));
  DEFINE(L2X0_R_PREFETCH_CTRL,	offsetof(struct l2x0_regs, prefetch_ctrl));
  DEFINE(L2X0_R_PWR_CTRL,	offsetof(struct l2x0_regs, pwr_ctrl));
  BLANK();
#endif
#ifdef CONFIG_CPU_HAS_ASID
  DEFINE(MM_CONTEXT_ID,		offsetof(struct mm_struct, context.id.counter));
  BLANK();
#endif
  DEFINE(VMA_VM_MM,		offsetof(struct vm_area_struct, vm_mm));
  DEFINE(VMA_VM_FLAGS,		offsetof(struct vm_area_struct, vm_flags));
  BLANK();
  DEFINE(VM_EXEC,	       	VM_EXEC);
  BLANK();
  DEFINE(PAGE_SZ,	       	PAGE_SIZE);
  BLANK();
  DEFINE(SYS_ERROR0,		0x9f0000);
  BLANK();
  DEFINE(SIZEOF_MACHINE_DESC,	sizeof(struct machine_desc));
  DEFINE(MACHINFO_TYPE,		offsetof(struct machine_desc, nr));
  DEFINE(MACHINFO_NAME,		offsetof(struct machine_desc, name));
  BLANK();
  DEFINE(PROC_INFO_SZ,		sizeof(struct proc_info_list));
  DEFINE(PROCINFO_INITFUNC,	offsetof(struct proc_info_list, __cpu_flush));
  DEFINE(PROCINFO_MM_MMUFLAGS,	offsetof(struct proc_info_list, __cpu_mm_mmu_flags));
  DEFINE(PROCINFO_IO_MMUFLAGS,	offsetof(struct proc_info_list, __cpu_io_mmu_flags));
  BLANK();
#ifdef MULTI_DABORT
  DEFINE(PROCESSOR_DABT_FUNC,	offsetof(struct processor, _data_abort));
#endif
#ifdef MULTI_PABORT
  DEFINE(PROCESSOR_PABT_FUNC,	offsetof(struct processor, _prefetch_abort));
#endif
#ifdef MULTI_CPU
  DEFINE(CPU_SLEEP_SIZE,	offsetof(struct processor, suspend_size));
  DEFINE(CPU_DO_SUSPEND,	offsetof(struct processor, do_suspend));
  DEFINE(CPU_DO_RESUME,		offsetof(struct processor, do_resume));
#endif
#ifdef MULTI_CACHE
  DEFINE(CACHE_FLUSH_KERN_ALL,	offsetof(struct cpu_cache_fns, flush_kern_all));
#endif
#ifdef CONFIG_ARM_CPU_SUSPEND
  DEFINE(SLEEP_SAVE_SP_SZ,	sizeof(struct sleep_save_sp));
  DEFINE(SLEEP_SAVE_SP_PHYS,	offsetof(struct sleep_save_sp, save_ptr_stash_phys));
  DEFINE(SLEEP_SAVE_SP_VIRT,	offsetof(struct sleep_save_sp, save_ptr_stash));
#endif
  BLANK();
  DEFINE(DMA_BIDIRECTIONAL,	DMA_BIDIRECTIONAL);
  DEFINE(DMA_TO_DEVICE,		DMA_TO_DEVICE);
  DEFINE(DMA_FROM_DEVICE,	DMA_FROM_DEVICE);
  BLANK();
  DEFINE(CACHE_WRITEBACK_ORDER, __CACHE_WRITEBACK_ORDER);
  DEFINE(CACHE_WRITEBACK_GRANULE, __CACHE_WRITEBACK_GRANULE);
  BLANK();
#ifdef CONFIG_KVM_ARM_HOST
  DEFINE(VCPU_GUEST_CTXT,	offsetof(struct kvm_vcpu, arch.ctxt));
  DEFINE(VCPU_HOST_CTXT,	offsetof(struct kvm_vcpu, arch.host_cpu_context));
  DEFINE(CPU_CTXT_VFP,		offsetof(struct kvm_cpu_context, vfp));
  DEFINE(CPU_CTXT_GP_REGS,	offsetof(struct kvm_cpu_context, gp_regs));
  DEFINE(GP_REGS_USR,		offsetof(struct kvm_regs, usr_regs));
#endif
  BLANK();
#ifdef CONFIG_VDSO
  DEFINE(VDSO_DATA_SIZE,	sizeof(union vdso_data_store));
#endif
  return 0; 
}