1. 根目录:
2. arch
3. arm64
4. kernel
5. asm-offsets.c

/*
 * Based on arch/arm/kernel/asm-offsets.c
 *
 * Copyright (C) 1995-2003 Russell King
 *               2001-2002 Keith Owens
 * Copyright (C) 2012 ARM Ltd.
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/dma-mapping.h>
#include <linux/kvm_host.h>
#include <asm/thread_info.h>
#include <asm/memory.h>
#include <asm/smp_plat.h>
#include <asm/suspend.h>
#include <asm/vdso_datapage.h>
#include <linux/kbuild.h>

int main(void)
{
  DEFINE(TSK_ACTIVE_MM,		offsetof(struct task_struct, active_mm));
  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));
  BLANK();
  DEFINE(THREAD_CPU_CONTEXT,	offsetof(struct task_struct, thread.cpu_context));
  BLANK();
  DEFINE(S_X0,			offsetof(struct pt_regs, regs[0]));
  DEFINE(S_X1,			offsetof(struct pt_regs, regs[1]));
  DEFINE(S_X2,			offsetof(struct pt_regs, regs[2]));
  DEFINE(S_X3,			offsetof(struct pt_regs, regs[3]));
  DEFINE(S_X4,			offsetof(struct pt_regs, regs[4]));
  DEFINE(S_X5,			offsetof(struct pt_regs, regs[5]));
  DEFINE(S_X6,			offsetof(struct pt_regs, regs[6]));
  DEFINE(S_X7,			offsetof(struct pt_regs, regs[7]));
  DEFINE(S_LR,			offsetof(struct pt_regs, regs[30]));
  DEFINE(S_SP,			offsetof(struct pt_regs, sp));
#ifdef CONFIG_COMPAT
  DEFINE(S_COMPAT_SP,		offsetof(struct pt_regs, compat_sp));
#endif
  DEFINE(S_PSTATE,		offsetof(struct pt_regs, pstate));
  DEFINE(S_PC,			offsetof(struct pt_regs, pc));
  DEFINE(S_ORIG_X0,		offsetof(struct pt_regs, orig_x0));
  DEFINE(S_SYSCALLNO,		offsetof(struct pt_regs, syscallno));
  DEFINE(S_FRAME_SIZE,		sizeof(struct pt_regs));
  BLANK();
  DEFINE(MM_CONTEXT_ID,		offsetof(struct mm_struct, context.id.counter));
  BLANK();
  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(DMA_BIDIRECTIONAL,	DMA_BIDIRECTIONAL);
  DEFINE(DMA_TO_DEVICE,		DMA_TO_DEVICE);
  DEFINE(DMA_FROM_DEVICE,	DMA_FROM_DEVICE);
  BLANK();
  DEFINE(CLOCK_REALTIME,	CLOCK_REALTIME);
  DEFINE(CLOCK_MONOTONIC,	CLOCK_MONOTONIC);
  DEFINE(CLOCK_REALTIME_RES,	MONOTONIC_RES_NSEC);
  DEFINE(CLOCK_REALTIME_COARSE,	CLOCK_REALTIME_COARSE);
  DEFINE(CLOCK_MONOTONIC_COARSE,CLOCK_MONOTONIC_COARSE);
  DEFINE(CLOCK_COARSE_RES,	LOW_RES_NSEC);
  DEFINE(NSEC_PER_SEC,		NSEC_PER_SEC);
  BLANK();
  DEFINE(VDSO_CS_CYCLE_LAST,	offsetof(struct vdso_data, cs_cycle_last));
  DEFINE(VDSO_XTIME_CLK_SEC,	offsetof(struct vdso_data, xtime_clock_sec));
  DEFINE(VDSO_XTIME_CLK_NSEC,	offsetof(struct vdso_data, xtime_clock_nsec));
  DEFINE(VDSO_XTIME_CRS_SEC,	offsetof(struct vdso_data, xtime_coarse_sec));
  DEFINE(VDSO_XTIME_CRS_NSEC,	offsetof(struct vdso_data, xtime_coarse_nsec));
  DEFINE(VDSO_WTM_CLK_SEC,	offsetof(struct vdso_data, wtm_clock_sec));
  DEFINE(VDSO_WTM_CLK_NSEC,	offsetof(struct vdso_data, wtm_clock_nsec));
  DEFINE(VDSO_TB_SEQ_COUNT,	offsetof(struct vdso_data, tb_seq_count));
  DEFINE(VDSO_CS_MULT,		offsetof(struct vdso_data, cs_mult));
  DEFINE(VDSO_CS_SHIFT,		offsetof(struct vdso_data, cs_shift));
  DEFINE(VDSO_TZ_MINWEST,	offsetof(struct vdso_data, tz_minuteswest));
  DEFINE(VDSO_TZ_DSTTIME,	offsetof(struct vdso_data, tz_dsttime));
  DEFINE(VDSO_USE_SYSCALL,	offsetof(struct vdso_data, use_syscall));
  BLANK();
  DEFINE(TVAL_TV_SEC,		offsetof(struct timeval, tv_sec));
  DEFINE(TVAL_TV_USEC,		offsetof(struct timeval, tv_usec));
  DEFINE(TSPEC_TV_SEC,		offsetof(struct timespec, tv_sec));
  DEFINE(TSPEC_TV_NSEC,		offsetof(struct timespec, tv_nsec));
  BLANK();
  DEFINE(TZ_MINWEST,		offsetof(struct timezone, tz_minuteswest));
  DEFINE(TZ_DSTTIME,		offsetof(struct timezone, tz_dsttime));
  BLANK();
#ifdef CONFIG_KVM_ARM_HOST
  DEFINE(VCPU_CONTEXT,		offsetof(struct kvm_vcpu, arch.ctxt));
  DEFINE(CPU_GP_REGS,		offsetof(struct kvm_cpu_context, gp_regs));
  DEFINE(CPU_USER_PT_REGS,	offsetof(struct kvm_regs, regs));
  DEFINE(CPU_FP_REGS,		offsetof(struct kvm_regs, fp_regs));
  DEFINE(CPU_SP_EL1,		offsetof(struct kvm_regs, sp_el1));
  DEFINE(CPU_ELR_EL1,		offsetof(struct kvm_regs, elr_el1));
  DEFINE(CPU_SPSR,		offsetof(struct kvm_regs, spsr));
  DEFINE(CPU_SYSREGS,		offsetof(struct kvm_cpu_context, sys_regs));
  DEFINE(VCPU_ESR_EL2,		offsetof(struct kvm_vcpu, arch.fault.esr_el2));
  DEFINE(VCPU_FAR_EL2,		offsetof(struct kvm_vcpu, arch.fault.far_el2));
  DEFINE(VCPU_HPFAR_EL2,	offsetof(struct kvm_vcpu, arch.fault.hpfar_el2));
  DEFINE(VCPU_DEBUG_FLAGS,	offsetof(struct kvm_vcpu, arch.debug_flags));
  DEFINE(VCPU_DEBUG_PTR,	offsetof(struct kvm_vcpu, arch.debug_ptr));
  DEFINE(DEBUG_BCR, 		offsetof(struct kvm_guest_debug_arch, dbg_bcr));
  DEFINE(DEBUG_BVR, 		offsetof(struct kvm_guest_debug_arch, dbg_bvr));
  DEFINE(DEBUG_WCR, 		offsetof(struct kvm_guest_debug_arch, dbg_wcr));
  DEFINE(DEBUG_WVR, 		offsetof(struct kvm_guest_debug_arch, dbg_wvr));
  DEFINE(VCPU_HCR_EL2,		offsetof(struct kvm_vcpu, arch.hcr_el2));
  DEFINE(VCPU_MDCR_EL2,	offsetof(struct kvm_vcpu, arch.mdcr_el2));
  DEFINE(VCPU_IRQ_LINES,	offsetof(struct kvm_vcpu, arch.irq_lines));
  DEFINE(VCPU_HOST_CONTEXT,	offsetof(struct kvm_vcpu, arch.host_cpu_context));
  DEFINE(VCPU_HOST_DEBUG_STATE, offsetof(struct kvm_vcpu, arch.host_debug_state));
  DEFINE(VCPU_TIMER_CNTV_CTL,	offsetof(struct kvm_vcpu, arch.timer_cpu.cntv_ctl));
  DEFINE(VCPU_TIMER_CNTV_CVAL,	offsetof(struct kvm_vcpu, arch.timer_cpu.cntv_cval));
  DEFINE(KVM_TIMER_CNTVOFF,	offsetof(struct kvm, arch.timer.cntvoff));
  DEFINE(KVM_TIMER_ENABLED,	offsetof(struct kvm, arch.timer.enabled));
  DEFINE(VCPU_KVM,		offsetof(struct kvm_vcpu, kvm));
  DEFINE(VCPU_VGIC_CPU,		offsetof(struct kvm_vcpu, arch.vgic_cpu));
  DEFINE(VGIC_V2_CPU_HCR,	offsetof(struct vgic_cpu, vgic_v2.vgic_hcr));
  DEFINE(VGIC_V2_CPU_VMCR,	offsetof(struct vgic_cpu, vgic_v2.vgic_vmcr));
  DEFINE(VGIC_V2_CPU_MISR,	offsetof(struct vgic_cpu, vgic_v2.vgic_misr));
  DEFINE(VGIC_V2_CPU_EISR,	offsetof(struct vgic_cpu, vgic_v2.vgic_eisr));
  DEFINE(VGIC_V2_CPU_ELRSR,	offsetof(struct vgic_cpu, vgic_v2.vgic_elrsr));
  DEFINE(VGIC_V2_CPU_APR,	offsetof(struct vgic_cpu, vgic_v2.vgic_apr));
  DEFINE(VGIC_V2_CPU_LR,	offsetof(struct vgic_cpu, vgic_v2.vgic_lr));
  DEFINE(VGIC_V3_CPU_SRE,	offsetof(struct vgic_cpu, vgic_v3.vgic_sre));
  DEFINE(VGIC_V3_CPU_HCR,	offsetof(struct vgic_cpu, vgic_v3.vgic_hcr));
  DEFINE(VGIC_V3_CPU_VMCR,	offsetof(struct vgic_cpu, vgic_v3.vgic_vmcr));
  DEFINE(VGIC_V3_CPU_MISR,	offsetof(struct vgic_cpu, vgic_v3.vgic_misr));
  DEFINE(VGIC_V3_CPU_EISR,	offsetof(struct vgic_cpu, vgic_v3.vgic_eisr));
  DEFINE(VGIC_V3_CPU_ELRSR,	offsetof(struct vgic_cpu, vgic_v3.vgic_elrsr));
  DEFINE(VGIC_V3_CPU_AP0R,	offsetof(struct vgic_cpu, vgic_v3.vgic_ap0r));
  DEFINE(VGIC_V3_CPU_AP1R,	offsetof(struct vgic_cpu, vgic_v3.vgic_ap1r));
  DEFINE(VGIC_V3_CPU_LR,	offsetof(struct vgic_cpu, vgic_v3.vgic_lr));
  DEFINE(VGIC_CPU_NR_LR,	offsetof(struct vgic_cpu, nr_lr));
  DEFINE(KVM_VTTBR,		offsetof(struct kvm, arch.vttbr));
  DEFINE(KVM_VGIC_VCTRL,	offsetof(struct kvm, arch.vgic.vctrl_base));
#endif
#ifdef CONFIG_CPU_PM
  DEFINE(CPU_SUSPEND_SZ,	sizeof(struct cpu_suspend_ctx));
  DEFINE(CPU_CTX_SP,		offsetof(struct cpu_suspend_ctx, sp));
  DEFINE(MPIDR_HASH_MASK,	offsetof(struct mpidr_hash, mask));
  DEFINE(MPIDR_HASH_SHIFTS,	offsetof(struct mpidr_hash, shift_aff));
  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
  return 0;
}