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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 | ||
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 | } |