asm-offsets.c

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * This program is used to generate definitions needed by
 4 * assembly language modules.
 5 *
 6 * We use the technique used in the OSF Mach kernel code:
 7 * generate asm statements containing #defines,
 8 * compile this file to assembler, and then extract the
 9 * #defines from the assembly-language output.
10 *
11 * On sparc, thread_info data is static and TI_XXX offsets are computed by hand.
12 */
13#define COMPILE_OFFSETS
14
15#include <linux/sched.h>
16#include <linux/mm_types.h>
17// #include <linux/mm.h>
18#include <linux/kbuild.h>
19
20#include <asm/hibernate.h>
21
22#ifdef CONFIG_SPARC32
23static int __used sparc32_foo(void)
24{
25	DEFINE(AOFF_thread_fork_kpsr,
26			offsetof(struct thread_struct, fork_kpsr));
27	return 0;
28}
29#else
30static int __used sparc64_foo(void)
31{
32#ifdef CONFIG_HIBERNATION
33	BLANK();
34	OFFSET(SC_REG_FP, saved_context, fp);
35	OFFSET(SC_REG_CWP, saved_context, cwp);
36	OFFSET(SC_REG_WSTATE, saved_context, wstate);
37
38	OFFSET(SC_REG_TICK, saved_context, tick);
39	OFFSET(SC_REG_PSTATE, saved_context, pstate);
40
41	OFFSET(SC_REG_G4, saved_context, g4);
42	OFFSET(SC_REG_G5, saved_context, g5);
43	OFFSET(SC_REG_G6, saved_context, g6);
44#endif
45	return 0;
46}
47#endif
48
49static int __used foo(void)
50{
51	BLANK();
52	DEFINE(AOFF_task_thread, offsetof(struct task_struct, thread));
53	BLANK();
54	DEFINE(AOFF_mm_context, offsetof(struct mm_struct, context));
55	BLANK();
56	DEFINE(VMA_VM_MM,    offsetof(struct vm_area_struct, vm_mm));
57
58	/* DEFINE(NUM_USER_SEGMENTS, TASK_SIZE>>28); */
59	return 0;
60}
61