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asm-offsets.c

/*
 * This program is used to generate definitions needed by
 * assembly language modules.
 *
 * We use the technique used in the OSF Mach kernel code:
 * generate asm statements containing #defines,
 * compile this file to assembler, and then extract the
 * #defines from the assembly-language output.
 */

#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/ptrace.h>
#include <linux/suspend.h>
#include <linux/mman.h>
#include <linux/mm.h>
#include <asm/io.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
#include <asm/cputable.h>
#include <asm/thread_info.h>
#include <asm/vdso_datapage.h>

#define DEFINE(sym, val) \
      asm volatile("\n->" #sym " %0 " #val : : "i" (val))

#define BLANK() asm volatile("\n->" : : )

int
main(void)
{
      DEFINE(THREAD, offsetof(struct task_struct, thread));
      DEFINE(THREAD_INFO, offsetof(struct task_struct, stack));
      DEFINE(MM, offsetof(struct task_struct, mm));
      DEFINE(PTRACE, offsetof(struct task_struct, ptrace));
      DEFINE(KSP, offsetof(struct thread_struct, ksp));
      DEFINE(PGDIR, offsetof(struct thread_struct, pgdir));
      DEFINE(PT_REGS, offsetof(struct thread_struct, regs));
      DEFINE(THREAD_FPEXC_MODE, offsetof(struct thread_struct, fpexc_mode));
      DEFINE(THREAD_FPR0, offsetof(struct thread_struct, fpr[0]));
      DEFINE(THREAD_FPSCR, offsetof(struct thread_struct, fpscr));
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
      DEFINE(THREAD_DBCR0, offsetof(struct thread_struct, dbcr0));
      DEFINE(PT_PTRACED, PT_PTRACED);
#endif
#ifdef CONFIG_ALTIVEC
      DEFINE(THREAD_VR0, offsetof(struct thread_struct, vr[0]));
      DEFINE(THREAD_VRSAVE, offsetof(struct thread_struct, vrsave));
      DEFINE(THREAD_VSCR, offsetof(struct thread_struct, vscr));
      DEFINE(THREAD_USED_VR, offsetof(struct thread_struct, used_vr));
#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_SPE
      DEFINE(THREAD_EVR0, offsetof(struct thread_struct, evr[0]));
      DEFINE(THREAD_ACC, offsetof(struct thread_struct, acc));
      DEFINE(THREAD_SPEFSCR, offsetof(struct thread_struct, spefscr));
      DEFINE(THREAD_USED_SPE, offsetof(struct thread_struct, used_spe));
#endif /* CONFIG_SPE */
      /* Interrupt register frame */
      DEFINE(STACK_FRAME_OVERHEAD, STACK_FRAME_OVERHEAD);
      DEFINE(INT_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs));
      /* in fact we only use gpr0 - gpr9 and gpr20 - gpr23 */
      DEFINE(GPR0, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[0]));
      DEFINE(GPR1, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[1]));
      DEFINE(GPR2, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[2]));
      DEFINE(GPR3, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[3]));
      DEFINE(GPR4, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[4]));
      DEFINE(GPR5, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[5]));
      DEFINE(GPR6, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[6]));
      DEFINE(GPR7, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[7]));
      DEFINE(GPR8, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[8]));
      DEFINE(GPR9, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[9]));
      DEFINE(GPR10, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[10]));
      DEFINE(GPR11, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[11]));
      DEFINE(GPR12, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[12]));
      DEFINE(GPR13, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[13]));
      DEFINE(GPR14, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[14]));
      DEFINE(GPR15, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[15]));
      DEFINE(GPR16, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[16]));
      DEFINE(GPR17, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[17]));
      DEFINE(GPR18, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[18]));
      DEFINE(GPR19, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[19]));
      DEFINE(GPR20, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[20]));
      DEFINE(GPR21, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[21]));
      DEFINE(GPR22, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[22]));
      DEFINE(GPR23, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[23]));
      DEFINE(GPR24, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[24]));
      DEFINE(GPR25, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[25]));
      DEFINE(GPR26, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[26]));
      DEFINE(GPR27, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[27]));
      DEFINE(GPR28, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[28]));
      DEFINE(GPR29, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[29]));
      DEFINE(GPR30, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[30]));
      DEFINE(GPR31, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[31]));
      /* Note: these symbols include _ because they overlap with special
       * register names
       */
      DEFINE(_NIP, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, nip));
      DEFINE(_MSR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, msr));
      DEFINE(_CTR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, ctr));
      DEFINE(_LINK, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, link));
      DEFINE(_CCR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, ccr));
      DEFINE(_MQ, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, mq));
      DEFINE(_XER, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, xer));
      DEFINE(_DAR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, dar));
      DEFINE(_DSISR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, dsisr));
      /* The PowerPC 400-class & Book-E processors have neither the DAR nor the DSISR
       * SPRs. Hence, we overload them to hold the similar DEAR and ESR SPRs
       * for such processors.  For critical interrupts we use them to
       * hold SRR0 and SRR1.
       */
      DEFINE(_DEAR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, dar));
      DEFINE(_ESR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, dsisr));
      DEFINE(ORIG_GPR3, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, orig_gpr3));
      DEFINE(RESULT, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, result));
      DEFINE(TRAP, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, trap));
      DEFINE(CLONE_VM, CLONE_VM);
      DEFINE(CLONE_UNTRACED, CLONE_UNTRACED);
      DEFINE(MM_PGD, offsetof(struct mm_struct, pgd));

      /* About the CPU features table */
      DEFINE(CPU_SPEC_ENTRY_SIZE, sizeof(struct cpu_spec));
      DEFINE(CPU_SPEC_PVR_MASK, offsetof(struct cpu_spec, pvr_mask));
      DEFINE(CPU_SPEC_PVR_VALUE, offsetof(struct cpu_spec, pvr_value));
      DEFINE(CPU_SPEC_FEATURES, offsetof(struct cpu_spec, cpu_features));
      DEFINE(CPU_SPEC_SETUP, offsetof(struct cpu_spec, cpu_setup));

      DEFINE(TI_TASK, offsetof(struct thread_info, task));
      DEFINE(TI_EXECDOMAIN, offsetof(struct thread_info, exec_domain));
      DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
      DEFINE(TI_LOCAL_FLAGS, offsetof(struct thread_info, local_flags));
      DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
      DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));

      DEFINE(pbe_address, offsetof(struct pbe, address));
      DEFINE(pbe_orig_address, offsetof(struct pbe, orig_address));
      DEFINE(pbe_next, offsetof(struct pbe, next));

      DEFINE(TASK_SIZE, TASK_SIZE);
      DEFINE(NUM_USER_SEGMENTS, TASK_SIZE>>28);

      /* datapage offsets for use by vdso */
      DEFINE(CFG_TB_ORIG_STAMP, offsetof(struct vdso_data, tb_orig_stamp));
      DEFINE(CFG_TB_TICKS_PER_SEC, offsetof(struct vdso_data, tb_ticks_per_sec));
      DEFINE(CFG_TB_TO_XS, offsetof(struct vdso_data, tb_to_xs));
      DEFINE(CFG_STAMP_XSEC, offsetof(struct vdso_data, stamp_xsec));
      DEFINE(CFG_TB_UPDATE_COUNT, offsetof(struct vdso_data, tb_update_count));
      DEFINE(CFG_TZ_MINUTEWEST, offsetof(struct vdso_data, tz_minuteswest));
      DEFINE(CFG_TZ_DSTTIME, offsetof(struct vdso_data, tz_dsttime));
      DEFINE(CFG_SYSCALL_MAP32, offsetof(struct vdso_data, syscall_map_32));
      DEFINE(WTOM_CLOCK_SEC, offsetof(struct vdso_data, wtom_clock_sec));
      DEFINE(WTOM_CLOCK_NSEC, offsetof(struct vdso_data, wtom_clock_nsec));
      DEFINE(TVAL32_TV_SEC, offsetof(struct timeval, tv_sec));
      DEFINE(TVAL32_TV_USEC, offsetof(struct timeval, tv_usec));
      DEFINE(TSPEC32_TV_SEC, offsetof(struct timespec, tv_sec));
      DEFINE(TSPEC32_TV_NSEC, offsetof(struct timespec, tv_nsec));

      /* timeval/timezone offsets for use by vdso */
      DEFINE(TZONE_TZ_MINWEST, offsetof(struct timezone, tz_minuteswest));
      DEFINE(TZONE_TZ_DSTTIME, offsetof(struct timezone, tz_dsttime));

      /* Other bits used by the vdso */
      DEFINE(CLOCK_REALTIME, CLOCK_REALTIME);
      DEFINE(CLOCK_MONOTONIC, CLOCK_MONOTONIC);
      DEFINE(NSEC_PER_SEC, NSEC_PER_SEC);
      DEFINE(CLOCK_REALTIME_RES, TICK_NSEC);

      return 0;
}

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