arch/ppc/kernel/asm-offsets.c

   1 /*
   2  * This program is used to generate definitions needed by
   3  * assembly language modules.
   4  *
   5  * We use the technique used in the OSF Mach kernel code:
   6  * generate asm statements containing #defines,
   7  * compile this file to assembler, and then extract the
   8  * #defines from the assembly-language output.
   9  */
  10
  11 #include <linux/config.h>
  12 #include <linux/signal.h>
  13 #include <linux/sched.h>
  14 #include <linux/kernel.h>
  15 #include <linux/errno.h>
  16 #include <linux/string.h>
  17 #include <linux/types.h>
  18 #include <linux/ptrace.h>
  19 #include <linux/suspend.h>
  20 #include <linux/mman.h>
  21 #include <linux/mm.h>
  22 #include <asm/io.h>
  23 #include <asm/page.h>
  24 #include <asm/pgtable.h>
  25 #include <asm/processor.h>
  26 #include <asm/cputable.h>
  27 #include <asm/thread_info.h>
  28
  29 #define DEFINE(sym, val) \
  30         asm volatile("\n->" #sym " %0 " #val : : "i" (val))
  31
  32 #define BLANK() asm volatile("\n->" : : )
  33
  34 int
  35 main(void)
  36 {
  37         DEFINE(THREAD, offsetof(struct task_struct, thread));
  38         DEFINE(THREAD_INFO, offsetof(struct task_struct, thread_info));
  39         DEFINE(MM, offsetof(struct task_struct, mm));
  40         DEFINE(PTRACE, offsetof(struct task_struct, ptrace));
  41         DEFINE(KSP, offsetof(struct thread_struct, ksp));
  42         DEFINE(PGDIR, offsetof(struct thread_struct, pgdir));
  43         DEFINE(LAST_SYSCALL, offsetof(struct thread_struct, last_syscall));
  44         DEFINE(PT_REGS, offsetof(struct thread_struct, regs));
  45         DEFINE(THREAD_FPEXC_MODE, offsetof(struct thread_struct, fpexc_mode));
  46         DEFINE(THREAD_FPR0, offsetof(struct thread_struct, fpr[0]));
  47         DEFINE(THREAD_FPSCR, offsetof(struct thread_struct, fpscr));
  48 #if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
  49         DEFINE(THREAD_DBCR0, offsetof(struct thread_struct, dbcr0));
  50         DEFINE(PT_PTRACED, PT_PTRACED);
  51 #endif
  52 #ifdef CONFIG_ALTIVEC
  53         DEFINE(THREAD_VR0, offsetof(struct thread_struct, vr[0]));
  54         DEFINE(THREAD_VRSAVE, offsetof(struct thread_struct, vrsave));
  55         DEFINE(THREAD_VSCR, offsetof(struct thread_struct, vscr));
  56         DEFINE(THREAD_USED_VR, offsetof(struct thread_struct, used_vr));
  57 #endif /* CONFIG_ALTIVEC */
  58 #ifdef CONFIG_SPE
  59         DEFINE(THREAD_EVR0, offsetof(struct thread_struct, evr[0]));
  60         DEFINE(THREAD_ACC, offsetof(struct thread_struct, acc));
  61         DEFINE(THREAD_SPEFSCR, offsetof(struct thread_struct, spefscr));
  62         DEFINE(THREAD_USED_SPE, offsetof(struct thread_struct, used_spe));
  63 #endif /* CONFIG_SPE */
  64         /* Interrupt register frame */
  65         DEFINE(STACK_FRAME_OVERHEAD, STACK_FRAME_OVERHEAD);
  66         DEFINE(INT_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs));
  67         /* in fact we only use gpr0 - gpr9 and gpr20 - gpr23 */
  68         DEFINE(GPR0, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[0]));
  69         DEFINE(GPR1, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[1]));
  70         DEFINE(GPR2, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[2]));
  71         DEFINE(GPR3, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[3]));
  72         DEFINE(GPR4, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[4]));
  73         DEFINE(GPR5, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[5]));
  74         DEFINE(GPR6, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[6]));
  75         DEFINE(GPR7, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[7]));
  76         DEFINE(GPR8, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[8]));
  77         DEFINE(GPR9, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[9]));
  78         DEFINE(GPR10, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[10]));
  79         DEFINE(GPR11, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[11]));
  80         DEFINE(GPR12, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[12]));
  81         DEFINE(GPR13, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[13]));
  82         DEFINE(GPR14, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[14]));
  83         DEFINE(GPR15, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[15]));
  84         DEFINE(GPR16, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[16]));
  85         DEFINE(GPR17, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[17]));
  86         DEFINE(GPR18, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[18]));
  87         DEFINE(GPR19, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[19]));
  88         DEFINE(GPR20, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[20]));
  89         DEFINE(GPR21, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[21]));
  90         DEFINE(GPR22, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[22]));
  91         DEFINE(GPR23, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[23]));
  92         DEFINE(GPR24, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[24]));
  93         DEFINE(GPR25, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[25]));
  94         DEFINE(GPR26, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[26]));
  95         DEFINE(GPR27, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[27]));
  96         DEFINE(GPR28, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[28]));
  97         DEFINE(GPR29, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[29]));
  98         DEFINE(GPR30, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[30]));
  99         DEFINE(GPR31, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[31]));
 100         /* Note: these symbols include _ because they overlap with special
 101          * register names
 102          */
 103         DEFINE(_NIP, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, nip));
 104         DEFINE(_MSR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, msr));
 105         DEFINE(_CTR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, ctr));
 106         DEFINE(_LINK, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, link));
 107         DEFINE(_CCR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, ccr));
 108         DEFINE(_MQ, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, mq));
 109         DEFINE(_XER, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, xer));
 110         DEFINE(_DAR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, dar));
 111         DEFINE(_DSISR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, dsisr));
 112         /* The PowerPC 400-class & Book-E processors have neither the DAR nor the DSISR
 113          * SPRs. Hence, we overload them to hold the similar DEAR and ESR SPRs
 114          * for such processors.  For critical interrupts we use them to
 115          * hold SRR0 and SRR1.
 116          */
 117         DEFINE(_DEAR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, dar));
 118         DEFINE(_ESR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, dsisr));
 119         DEFINE(ORIG_GPR3, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, orig_gpr3));
 120         DEFINE(RESULT, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, result));
 121         DEFINE(TRAP, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, trap));
 122         DEFINE(CLONE_VM, CLONE_VM);
 123         DEFINE(CLONE_UNTRACED, CLONE_UNTRACED);
 124         DEFINE(MM_PGD, offsetof(struct mm_struct, pgd));
 125
 126         /* About the CPU features table */
 127         DEFINE(CPU_SPEC_ENTRY_SIZE, sizeof(struct cpu_spec));
 128         DEFINE(CPU_SPEC_PVR_MASK, offsetof(struct cpu_spec, pvr_mask));
 129         DEFINE(CPU_SPEC_PVR_VALUE, offsetof(struct cpu_spec, pvr_value));
 130         DEFINE(CPU_SPEC_FEATURES, offsetof(struct cpu_spec, cpu_features));
 131         DEFINE(CPU_SPEC_SETUP, offsetof(struct cpu_spec, cpu_setup));
 132
 133         DEFINE(TI_TASK, offsetof(struct thread_info, task));
 134         DEFINE(TI_EXECDOMAIN, offsetof(struct thread_info, exec_domain));
 135         DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
 136         DEFINE(TI_LOCAL_FLAGS, offsetof(struct thread_info, local_flags));
 137         DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
 138         DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
 139
 140         DEFINE(pbe_address, offsetof(struct pbe, address));
 141         DEFINE(pbe_orig_address, offsetof(struct pbe, orig_address));
 142         DEFINE(pbe_next, offsetof(struct pbe, next));
 143
 144         DEFINE(NUM_USER_SEGMENTS, TASK_SIZE>>28);
 145         return 0;
 146 }