arch/xtensa/kernel/asm-offsets.c

   1 /*
   2  * arch/xtensa/kernel/asm-offsets.c
   3  *
   4  * Generates definitions from c-type structures used by assembly sources.
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  *
  10  * Copyright (C) 2005 Tensilica Inc.
  11  *
  12  * Chris Zankel <chris@zankel.net>
  13  */
  14
  15 #include <asm/processor.h>
  16
  17 #include <linux/types.h>
  18 #include <linux/stddef.h>
  19 #include <linux/thread_info.h>
  20 #include <linux/ptrace.h>
  21 #include <asm/ptrace.h>
  22 #include <asm/processor.h>
  23 #include <asm/uaccess.h>
  24
  25 #define DEFINE(sym, val) asm volatile("\n->" #sym " %0 " #val : : "i" (val))
  26 #define BLANK() asm volatile("\n->" : : )
  27
  28 int main(void)
  29 {
  30         /* struct pt_regs */
  31         DEFINE(PT_PC, offsetof (struct pt_regs, pc));
  32         DEFINE(PT_PS, offsetof (struct pt_regs, ps));
  33         DEFINE(PT_DEPC, offsetof (struct pt_regs, depc));
  34         DEFINE(PT_EXCCAUSE, offsetof (struct pt_regs, exccause));
  35         DEFINE(PT_EXCVADDR, offsetof (struct pt_regs, excvaddr));
  36         DEFINE(PT_DEBUGCAUSE, offsetof (struct pt_regs, debugcause));
  37         DEFINE(PT_WMASK, offsetof (struct pt_regs, wmask));
  38         DEFINE(PT_LBEG, offsetof (struct pt_regs, lbeg));
  39         DEFINE(PT_LEND, offsetof (struct pt_regs, lend));
  40         DEFINE(PT_LCOUNT, offsetof (struct pt_regs, lcount));
  41         DEFINE(PT_SAR, offsetof (struct pt_regs, sar));
  42         DEFINE(PT_SYSCALL, offsetof (struct pt_regs, syscall));
  43         DEFINE(PT_AREG, offsetof (struct pt_regs, areg[0]));
  44         DEFINE(PT_AREG0, offsetof (struct pt_regs, areg[0]));
  45         DEFINE(PT_AREG1, offsetof (struct pt_regs, areg[1]));
  46         DEFINE(PT_AREG2, offsetof (struct pt_regs, areg[2]));
  47         DEFINE(PT_AREG3, offsetof (struct pt_regs, areg[3]));
  48         DEFINE(PT_AREG4, offsetof (struct pt_regs, areg[4]));
  49         DEFINE(PT_AREG5, offsetof (struct pt_regs, areg[5]));
  50         DEFINE(PT_AREG6, offsetof (struct pt_regs, areg[6]));
  51         DEFINE(PT_AREG7, offsetof (struct pt_regs, areg[7]));
  52         DEFINE(PT_AREG8, offsetof (struct pt_regs, areg[8]));
  53         DEFINE(PT_AREG9, offsetof (struct pt_regs, areg[9]));
  54         DEFINE(PT_AREG10, offsetof (struct pt_regs, areg[10]));
  55         DEFINE(PT_AREG11, offsetof (struct pt_regs, areg[11]));
  56         DEFINE(PT_AREG12, offsetof (struct pt_regs, areg[12]));
  57         DEFINE(PT_AREG13, offsetof (struct pt_regs, areg[13]));
  58         DEFINE(PT_AREG14, offsetof (struct pt_regs, areg[14]));
  59         DEFINE(PT_AREG15, offsetof (struct pt_regs, areg[15]));
  60         DEFINE(PT_WINDOWBASE, offsetof (struct pt_regs, windowbase));
  61         DEFINE(PT_WINDOWSTART, offsetof(struct pt_regs, windowstart));
  62         DEFINE(PT_SIZE, sizeof(struct pt_regs));
  63         DEFINE(PT_AREG_END, offsetof (struct pt_regs, areg[XCHAL_NUM_AREGS]));
  64         DEFINE(PT_USER_SIZE, offsetof(struct pt_regs, areg[XCHAL_NUM_AREGS]));
  65         BLANK();
  66
  67         /* struct task_struct */
  68         DEFINE(TASK_PTRACE, offsetof (struct task_struct, ptrace));
  69         DEFINE(TASK_MM, offsetof (struct task_struct, mm));
  70         DEFINE(TASK_ACTIVE_MM, offsetof (struct task_struct, active_mm));
  71         DEFINE(TASK_PID, offsetof (struct task_struct, pid));
  72         DEFINE(TASK_THREAD, offsetof (struct task_struct, thread));
  73         DEFINE(TASK_THREAD_INFO, offsetof (struct task_struct, thread_info));
  74         DEFINE(TASK_STRUCT_SIZE, sizeof (struct task_struct));
  75         BLANK();
  76
  77         /* struct thread_info (offset from start_struct) */
  78         DEFINE(THREAD_RA, offsetof (struct task_struct, thread.ra));
  79         DEFINE(THREAD_SP, offsetof (struct task_struct, thread.sp));
  80         DEFINE(THREAD_CP_SAVE, offsetof (struct task_struct, thread.cp_save));
  81         DEFINE(THREAD_CURRENT_DS, offsetof (struct task_struct, thread.current_ds));
  82         BLANK();
  83
  84         /* struct mm_struct */
  85         DEFINE(MM_USERS, offsetof(struct mm_struct, mm_users));
  86         DEFINE(MM_PGD, offsetof (struct mm_struct, pgd));
  87         DEFINE(MM_CONTEXT, offsetof (struct mm_struct, context));
  88         BLANK();
  89         DEFINE(PT_SINGLESTEP_BIT, PT_SINGLESTEP_BIT);
  90         return 0;
  91 }
  92
  93