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/arch/arm/kernel/asm-offsets.c

https://bitbucket.org/evzijst/gittest
C | 83 lines | 54 code | 5 blank | 24 comment | 13 complexity | f2b7045b50902e47097bd4766dc643be MD5 | raw file
 1/*
 2 * Copyright (C) 1995-2003 Russell King
 3 *               2001-2002 Keith Owens
 4 *     
 5 * Generate definitions needed by assembly language modules.
 6 * This code generates raw asm output which is post-processed to extract
 7 * and format the required data.
 8 *
 9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13#include <linux/sched.h>
14#include <linux/mm.h>
15#include <asm/mach/arch.h>
16#include <asm/thread_info.h>
17#include <asm/memory.h>
18
19/*
20 * Make sure that the compiler and target are compatible.
21 */
22#if defined(__APCS_26__)
23#error Sorry, your compiler targets APCS-26 but this kernel requires APCS-32
24#endif
25/*
26 * GCC 2.95.1, 2.95.2: ignores register clobber list in asm().
27 * GCC 3.0, 3.1: general bad code generation.
28 * GCC 3.2.0: incorrect function argument offset calculation.
29 * GCC 3.2.x: miscompiles NEW_AUX_ENT in fs/binfmt_elf.c
30 *            (http://gcc.gnu.org/PR8896) and incorrect structure
31 *	      initialisation in fs/jffs2/erase.c
32 */
33#if __GNUC__ < 2 || \
34   (__GNUC__ == 2 && __GNUC_MINOR__ < 95) || \
35   (__GNUC__ == 2 && __GNUC_MINOR__ == 95 && __GNUC_PATCHLEVEL__ != 0 && \
36					     __GNUC_PATCHLEVEL__ < 3) || \
37   (__GNUC__ == 3 && __GNUC_MINOR__ < 3)
38#error Your compiler is too buggy; it is known to miscompile kernels.
39#error    Known good compilers: 2.95.3, 2.95.4, 2.96, 3.3
40#endif
41
42/* Use marker if you need to separate the values later */
43
44#define DEFINE(sym, val) \
45        asm volatile("\n->" #sym " %0 " #val : : "i" (val))
46
47#define BLANK() asm volatile("\n->" : : )
48
49int main(void)
50{
51  DEFINE(TSK_ACTIVE_MM,		offsetof(struct task_struct, active_mm));
52  BLANK();
53  DEFINE(TI_FLAGS,		offsetof(struct thread_info, flags));
54  DEFINE(TI_PREEMPT,		offsetof(struct thread_info, preempt_count));
55  DEFINE(TI_ADDR_LIMIT,		offsetof(struct thread_info, addr_limit));
56  DEFINE(TI_TASK,		offsetof(struct thread_info, task));
57  DEFINE(TI_EXEC_DOMAIN,	offsetof(struct thread_info, exec_domain));
58  DEFINE(TI_CPU,		offsetof(struct thread_info, cpu));
59  DEFINE(TI_CPU_DOMAIN,		offsetof(struct thread_info, cpu_domain));
60  DEFINE(TI_CPU_SAVE,		offsetof(struct thread_info, cpu_context));
61  DEFINE(TI_USED_CP,		offsetof(struct thread_info, used_cp));
62  DEFINE(TI_TP_VALUE,		offsetof(struct thread_info, tp_value));
63  DEFINE(TI_FPSTATE,		offsetof(struct thread_info, fpstate));
64  DEFINE(TI_VFPSTATE,		offsetof(struct thread_info, vfpstate));
65  DEFINE(TI_IWMMXT_STATE,	(offsetof(struct thread_info, fpstate)+4)&~7);
66  BLANK();
67#if __LINUX_ARM_ARCH__ >= 6
68  DEFINE(MM_CONTEXT_ID,		offsetof(struct mm_struct, context.id));
69  BLANK();
70#endif
71  DEFINE(VMA_VM_MM,		offsetof(struct vm_area_struct, vm_mm));
72  DEFINE(VMA_VM_FLAGS,		offsetof(struct vm_area_struct, vm_flags));
73  BLANK();
74  DEFINE(VM_EXEC,	       	VM_EXEC);
75  BLANK();
76  DEFINE(PAGE_SZ,	       	PAGE_SIZE);
77  DEFINE(VIRT_OFFSET,		PAGE_OFFSET);
78  BLANK();
79  DEFINE(SYS_ERROR0,		0x9f0000);
80  BLANK();
81  DEFINE(SIZEOF_MACHINE_DESC,	sizeof(struct machine_desc));
82  return 0; 
83}