1 /*
2 * OpenRISC asm-offsets.c
3 *
4 * Linux architectural port borrowing liberally from similar works of
5 * others. All original copyrights apply as per the original source
6 * declaration.
7 *
8 * Modifications for the OpenRISC architecture:
9 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
10 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 *
17 * This program is used to generate definitions needed by
18 * assembly language modules.
19 *
20 * We use the technique used in the OSF Mach kernel code:
21 * generate asm statements containing #defines,
22 * compile this file to assembler, and then extract the
23 * #defines from the assembly-language output.
24 */
25
26 #include <linux/signal.h>
27 #include <linux/sched.h>
28 #include <linux/kernel.h>
29 #include <linux/errno.h>
30 #include <linux/string.h>
31 #include <linux/types.h>
32 #include <linux/ptrace.h>
33 #include <linux/mman.h>
34 #include <linux/mm.h>
35 #include <linux/io.h>
36 #include <linux/thread_info.h>
37 #include <asm/page.h>
38 #include <asm/pgtable.h>
39 #include <asm/processor.h>
40
41 #define DEFINE(sym, val) \
42 asm volatile("\n->" #sym " %0 " #val : : "i" (val))
43
44 #define BLANK() asm volatile("\n->" : : )
45
main(void)46 int main(void)
47 {
48 /* offsets into the task_struct */
49 DEFINE(TASK_STATE, offsetof(struct task_struct, state));
50 DEFINE(TASK_FLAGS, offsetof(struct task_struct, flags));
51 DEFINE(TASK_PTRACE, offsetof(struct task_struct, ptrace));
52 DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
53 DEFINE(TASK_MM, offsetof(struct task_struct, mm));
54 DEFINE(TASK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
55
56 /* offsets into thread_info */
57 DEFINE(TI_TASK, offsetof(struct thread_info, task));
58 DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
59 DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
60 DEFINE(TI_KSP, offsetof(struct thread_info, ksp));
61
62 DEFINE(PT_SIZE, sizeof(struct pt_regs));
63
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
68 DEFINE(NUM_USER_SEGMENTS, TASK_SIZE >> 28);
69 return 0;
70 }
71