xref: /openbmc/linux/arch/riscv/kernel/asm-offsets.c (revision ae0be8de) 
1 /*
2  * Copyright (C) 2012 Regents of the University of California
3  * Copyright (C) 2017 SiFive
4  *
5  *   This program is free software; you can redistribute it and/or
6  *   modify it under the terms of the GNU General Public License
7  *   as published by the Free Software Foundation, version 2.
8  *
9  *   This program is distributed in the hope that it will be useful,
10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  *   GNU General Public License for more details.
13  */
14 
15 #define GENERATING_ASM_OFFSETS
16 
17 #include <linux/kbuild.h>
18 #include <linux/sched.h>
19 #include <asm/thread_info.h>
20 #include <asm/ptrace.h>
21 
22 void asm_offsets(void)
23 {
24 	OFFSET(TASK_THREAD_RA, task_struct, thread.ra);
25 	OFFSET(TASK_THREAD_SP, task_struct, thread.sp);
26 	OFFSET(TASK_THREAD_S0, task_struct, thread.s[0]);
27 	OFFSET(TASK_THREAD_S1, task_struct, thread.s[1]);
28 	OFFSET(TASK_THREAD_S2, task_struct, thread.s[2]);
29 	OFFSET(TASK_THREAD_S3, task_struct, thread.s[3]);
30 	OFFSET(TASK_THREAD_S4, task_struct, thread.s[4]);
31 	OFFSET(TASK_THREAD_S5, task_struct, thread.s[5]);
32 	OFFSET(TASK_THREAD_S6, task_struct, thread.s[6]);
33 	OFFSET(TASK_THREAD_S7, task_struct, thread.s[7]);
34 	OFFSET(TASK_THREAD_S8, task_struct, thread.s[8]);
35 	OFFSET(TASK_THREAD_S9, task_struct, thread.s[9]);
36 	OFFSET(TASK_THREAD_S10, task_struct, thread.s[10]);
37 	OFFSET(TASK_THREAD_S11, task_struct, thread.s[11]);
38 	OFFSET(TASK_THREAD_SP, task_struct, thread.sp);
39 	OFFSET(TASK_STACK, task_struct, stack);
40 	OFFSET(TASK_TI, task_struct, thread_info);
41 	OFFSET(TASK_TI_FLAGS, task_struct, thread_info.flags);
42 	OFFSET(TASK_TI_PREEMPT_COUNT, task_struct, thread_info.preempt_count);
43 	OFFSET(TASK_TI_KERNEL_SP, task_struct, thread_info.kernel_sp);
44 	OFFSET(TASK_TI_USER_SP, task_struct, thread_info.user_sp);
45 	OFFSET(TASK_TI_CPU, task_struct, thread_info.cpu);
46 
47 	OFFSET(TASK_THREAD_F0,  task_struct, thread.fstate.f[0]);
48 	OFFSET(TASK_THREAD_F1,  task_struct, thread.fstate.f[1]);
49 	OFFSET(TASK_THREAD_F2,  task_struct, thread.fstate.f[2]);
50 	OFFSET(TASK_THREAD_F3,  task_struct, thread.fstate.f[3]);
51 	OFFSET(TASK_THREAD_F4,  task_struct, thread.fstate.f[4]);
52 	OFFSET(TASK_THREAD_F5,  task_struct, thread.fstate.f[5]);
53 	OFFSET(TASK_THREAD_F6,  task_struct, thread.fstate.f[6]);
54 	OFFSET(TASK_THREAD_F7,  task_struct, thread.fstate.f[7]);
55 	OFFSET(TASK_THREAD_F8,  task_struct, thread.fstate.f[8]);
56 	OFFSET(TASK_THREAD_F9,  task_struct, thread.fstate.f[9]);
57 	OFFSET(TASK_THREAD_F10, task_struct, thread.fstate.f[10]);
58 	OFFSET(TASK_THREAD_F11, task_struct, thread.fstate.f[11]);
59 	OFFSET(TASK_THREAD_F12, task_struct, thread.fstate.f[12]);
60 	OFFSET(TASK_THREAD_F13, task_struct, thread.fstate.f[13]);
61 	OFFSET(TASK_THREAD_F14, task_struct, thread.fstate.f[14]);
62 	OFFSET(TASK_THREAD_F15, task_struct, thread.fstate.f[15]);
63 	OFFSET(TASK_THREAD_F16, task_struct, thread.fstate.f[16]);
64 	OFFSET(TASK_THREAD_F17, task_struct, thread.fstate.f[17]);
65 	OFFSET(TASK_THREAD_F18, task_struct, thread.fstate.f[18]);
66 	OFFSET(TASK_THREAD_F19, task_struct, thread.fstate.f[19]);
67 	OFFSET(TASK_THREAD_F20, task_struct, thread.fstate.f[20]);
68 	OFFSET(TASK_THREAD_F21, task_struct, thread.fstate.f[21]);
69 	OFFSET(TASK_THREAD_F22, task_struct, thread.fstate.f[22]);
70 	OFFSET(TASK_THREAD_F23, task_struct, thread.fstate.f[23]);
71 	OFFSET(TASK_THREAD_F24, task_struct, thread.fstate.f[24]);
72 	OFFSET(TASK_THREAD_F25, task_struct, thread.fstate.f[25]);
73 	OFFSET(TASK_THREAD_F26, task_struct, thread.fstate.f[26]);
74 	OFFSET(TASK_THREAD_F27, task_struct, thread.fstate.f[27]);
75 	OFFSET(TASK_THREAD_F28, task_struct, thread.fstate.f[28]);
76 	OFFSET(TASK_THREAD_F29, task_struct, thread.fstate.f[29]);
77 	OFFSET(TASK_THREAD_F30, task_struct, thread.fstate.f[30]);
78 	OFFSET(TASK_THREAD_F31, task_struct, thread.fstate.f[31]);
79 	OFFSET(TASK_THREAD_FCSR, task_struct, thread.fstate.fcsr);
80 
81 	DEFINE(PT_SIZE, sizeof(struct pt_regs));
82 	OFFSET(PT_SEPC, pt_regs, sepc);
83 	OFFSET(PT_RA, pt_regs, ra);
84 	OFFSET(PT_FP, pt_regs, s0);
85 	OFFSET(PT_S0, pt_regs, s0);
86 	OFFSET(PT_S1, pt_regs, s1);
87 	OFFSET(PT_S2, pt_regs, s2);
88 	OFFSET(PT_S3, pt_regs, s3);
89 	OFFSET(PT_S4, pt_regs, s4);
90 	OFFSET(PT_S5, pt_regs, s5);
91 	OFFSET(PT_S6, pt_regs, s6);
92 	OFFSET(PT_S7, pt_regs, s7);
93 	OFFSET(PT_S8, pt_regs, s8);
94 	OFFSET(PT_S9, pt_regs, s9);
95 	OFFSET(PT_S10, pt_regs, s10);
96 	OFFSET(PT_S11, pt_regs, s11);
97 	OFFSET(PT_SP, pt_regs, sp);
98 	OFFSET(PT_TP, pt_regs, tp);
99 	OFFSET(PT_A0, pt_regs, a0);
100 	OFFSET(PT_A1, pt_regs, a1);
101 	OFFSET(PT_A2, pt_regs, a2);
102 	OFFSET(PT_A3, pt_regs, a3);
103 	OFFSET(PT_A4, pt_regs, a4);
104 	OFFSET(PT_A5, pt_regs, a5);
105 	OFFSET(PT_A6, pt_regs, a6);
106 	OFFSET(PT_A7, pt_regs, a7);
107 	OFFSET(PT_T0, pt_regs, t0);
108 	OFFSET(PT_T1, pt_regs, t1);
109 	OFFSET(PT_T2, pt_regs, t2);
110 	OFFSET(PT_T3, pt_regs, t3);
111 	OFFSET(PT_T4, pt_regs, t4);
112 	OFFSET(PT_T5, pt_regs, t5);
113 	OFFSET(PT_T6, pt_regs, t6);
114 	OFFSET(PT_GP, pt_regs, gp);
115 	OFFSET(PT_ORIG_A0, pt_regs, orig_a0);
116 	OFFSET(PT_SSTATUS, pt_regs, sstatus);
117 	OFFSET(PT_SBADADDR, pt_regs, sbadaddr);
118 	OFFSET(PT_SCAUSE, pt_regs, scause);
119 
120 	/*
121 	 * THREAD_{F,X}* might be larger than a S-type offset can handle, but
122 	 * these are used in performance-sensitive assembly so we can't resort
123 	 * to loading the long immediate every time.
124 	 */
125 	DEFINE(TASK_THREAD_RA_RA,
126 		  offsetof(struct task_struct, thread.ra)
127 		- offsetof(struct task_struct, thread.ra)
128 	);
129 	DEFINE(TASK_THREAD_SP_RA,
130 		  offsetof(struct task_struct, thread.sp)
131 		- offsetof(struct task_struct, thread.ra)
132 	);
133 	DEFINE(TASK_THREAD_S0_RA,
134 		  offsetof(struct task_struct, thread.s[0])
135 		- offsetof(struct task_struct, thread.ra)
136 	);
137 	DEFINE(TASK_THREAD_S1_RA,
138 		  offsetof(struct task_struct, thread.s[1])
139 		- offsetof(struct task_struct, thread.ra)
140 	);
141 	DEFINE(TASK_THREAD_S2_RA,
142 		  offsetof(struct task_struct, thread.s[2])
143 		- offsetof(struct task_struct, thread.ra)
144 	);
145 	DEFINE(TASK_THREAD_S3_RA,
146 		  offsetof(struct task_struct, thread.s[3])
147 		- offsetof(struct task_struct, thread.ra)
148 	);
149 	DEFINE(TASK_THREAD_S4_RA,
150 		  offsetof(struct task_struct, thread.s[4])
151 		- offsetof(struct task_struct, thread.ra)
152 	);
153 	DEFINE(TASK_THREAD_S5_RA,
154 		  offsetof(struct task_struct, thread.s[5])
155 		- offsetof(struct task_struct, thread.ra)
156 	);
157 	DEFINE(TASK_THREAD_S6_RA,
158 		  offsetof(struct task_struct, thread.s[6])
159 		- offsetof(struct task_struct, thread.ra)
160 	);
161 	DEFINE(TASK_THREAD_S7_RA,
162 		  offsetof(struct task_struct, thread.s[7])
163 		- offsetof(struct task_struct, thread.ra)
164 	);
165 	DEFINE(TASK_THREAD_S8_RA,
166 		  offsetof(struct task_struct, thread.s[8])
167 		- offsetof(struct task_struct, thread.ra)
168 	);
169 	DEFINE(TASK_THREAD_S9_RA,
170 		  offsetof(struct task_struct, thread.s[9])
171 		- offsetof(struct task_struct, thread.ra)
172 	);
173 	DEFINE(TASK_THREAD_S10_RA,
174 		  offsetof(struct task_struct, thread.s[10])
175 		- offsetof(struct task_struct, thread.ra)
176 	);
177 	DEFINE(TASK_THREAD_S11_RA,
178 		  offsetof(struct task_struct, thread.s[11])
179 		- offsetof(struct task_struct, thread.ra)
180 	);
181 
182 	DEFINE(TASK_THREAD_F0_F0,
183 		  offsetof(struct task_struct, thread.fstate.f[0])
184 		- offsetof(struct task_struct, thread.fstate.f[0])
185 	);
186 	DEFINE(TASK_THREAD_F1_F0,
187 		  offsetof(struct task_struct, thread.fstate.f[1])
188 		- offsetof(struct task_struct, thread.fstate.f[0])
189 	);
190 	DEFINE(TASK_THREAD_F2_F0,
191 		  offsetof(struct task_struct, thread.fstate.f[2])
192 		- offsetof(struct task_struct, thread.fstate.f[0])
193 	);
194 	DEFINE(TASK_THREAD_F3_F0,
195 		  offsetof(struct task_struct, thread.fstate.f[3])
196 		- offsetof(struct task_struct, thread.fstate.f[0])
197 	);
198 	DEFINE(TASK_THREAD_F4_F0,
199 		  offsetof(struct task_struct, thread.fstate.f[4])
200 		- offsetof(struct task_struct, thread.fstate.f[0])
201 	);
202 	DEFINE(TASK_THREAD_F5_F0,
203 		  offsetof(struct task_struct, thread.fstate.f[5])
204 		- offsetof(struct task_struct, thread.fstate.f[0])
205 	);
206 	DEFINE(TASK_THREAD_F6_F0,
207 		  offsetof(struct task_struct, thread.fstate.f[6])
208 		- offsetof(struct task_struct, thread.fstate.f[0])
209 	);
210 	DEFINE(TASK_THREAD_F7_F0,
211 		  offsetof(struct task_struct, thread.fstate.f[7])
212 		- offsetof(struct task_struct, thread.fstate.f[0])
213 	);
214 	DEFINE(TASK_THREAD_F8_F0,
215 		  offsetof(struct task_struct, thread.fstate.f[8])
216 		- offsetof(struct task_struct, thread.fstate.f[0])
217 	);
218 	DEFINE(TASK_THREAD_F9_F0,
219 		  offsetof(struct task_struct, thread.fstate.f[9])
220 		- offsetof(struct task_struct, thread.fstate.f[0])
221 	);
222 	DEFINE(TASK_THREAD_F10_F0,
223 		  offsetof(struct task_struct, thread.fstate.f[10])
224 		- offsetof(struct task_struct, thread.fstate.f[0])
225 	);
226 	DEFINE(TASK_THREAD_F11_F0,
227 		  offsetof(struct task_struct, thread.fstate.f[11])
228 		- offsetof(struct task_struct, thread.fstate.f[0])
229 	);
230 	DEFINE(TASK_THREAD_F12_F0,
231 		  offsetof(struct task_struct, thread.fstate.f[12])
232 		- offsetof(struct task_struct, thread.fstate.f[0])
233 	);
234 	DEFINE(TASK_THREAD_F13_F0,
235 		  offsetof(struct task_struct, thread.fstate.f[13])
236 		- offsetof(struct task_struct, thread.fstate.f[0])
237 	);
238 	DEFINE(TASK_THREAD_F14_F0,
239 		  offsetof(struct task_struct, thread.fstate.f[14])
240 		- offsetof(struct task_struct, thread.fstate.f[0])
241 	);
242 	DEFINE(TASK_THREAD_F15_F0,
243 		  offsetof(struct task_struct, thread.fstate.f[15])
244 		- offsetof(struct task_struct, thread.fstate.f[0])
245 	);
246 	DEFINE(TASK_THREAD_F16_F0,
247 		  offsetof(struct task_struct, thread.fstate.f[16])
248 		- offsetof(struct task_struct, thread.fstate.f[0])
249 	);
250 	DEFINE(TASK_THREAD_F17_F0,
251 		  offsetof(struct task_struct, thread.fstate.f[17])
252 		- offsetof(struct task_struct, thread.fstate.f[0])
253 	);
254 	DEFINE(TASK_THREAD_F18_F0,
255 		  offsetof(struct task_struct, thread.fstate.f[18])
256 		- offsetof(struct task_struct, thread.fstate.f[0])
257 	);
258 	DEFINE(TASK_THREAD_F19_F0,
259 		  offsetof(struct task_struct, thread.fstate.f[19])
260 		- offsetof(struct task_struct, thread.fstate.f[0])
261 	);
262 	DEFINE(TASK_THREAD_F20_F0,
263 		  offsetof(struct task_struct, thread.fstate.f[20])
264 		- offsetof(struct task_struct, thread.fstate.f[0])
265 	);
266 	DEFINE(TASK_THREAD_F21_F0,
267 		  offsetof(struct task_struct, thread.fstate.f[21])
268 		- offsetof(struct task_struct, thread.fstate.f[0])
269 	);
270 	DEFINE(TASK_THREAD_F22_F0,
271 		  offsetof(struct task_struct, thread.fstate.f[22])
272 		- offsetof(struct task_struct, thread.fstate.f[0])
273 	);
274 	DEFINE(TASK_THREAD_F23_F0,
275 		  offsetof(struct task_struct, thread.fstate.f[23])
276 		- offsetof(struct task_struct, thread.fstate.f[0])
277 	);
278 	DEFINE(TASK_THREAD_F24_F0,
279 		  offsetof(struct task_struct, thread.fstate.f[24])
280 		- offsetof(struct task_struct, thread.fstate.f[0])
281 	);
282 	DEFINE(TASK_THREAD_F25_F0,
283 		  offsetof(struct task_struct, thread.fstate.f[25])
284 		- offsetof(struct task_struct, thread.fstate.f[0])
285 	);
286 	DEFINE(TASK_THREAD_F26_F0,
287 		  offsetof(struct task_struct, thread.fstate.f[26])
288 		- offsetof(struct task_struct, thread.fstate.f[0])
289 	);
290 	DEFINE(TASK_THREAD_F27_F0,
291 		  offsetof(struct task_struct, thread.fstate.f[27])
292 		- offsetof(struct task_struct, thread.fstate.f[0])
293 	);
294 	DEFINE(TASK_THREAD_F28_F0,
295 		  offsetof(struct task_struct, thread.fstate.f[28])
296 		- offsetof(struct task_struct, thread.fstate.f[0])
297 	);
298 	DEFINE(TASK_THREAD_F29_F0,
299 		  offsetof(struct task_struct, thread.fstate.f[29])
300 		- offsetof(struct task_struct, thread.fstate.f[0])
301 	);
302 	DEFINE(TASK_THREAD_F30_F0,
303 		  offsetof(struct task_struct, thread.fstate.f[30])
304 		- offsetof(struct task_struct, thread.fstate.f[0])
305 	);
306 	DEFINE(TASK_THREAD_F31_F0,
307 		  offsetof(struct task_struct, thread.fstate.f[31])
308 		- offsetof(struct task_struct, thread.fstate.f[0])
309 	);
310 	DEFINE(TASK_THREAD_FCSR_F0,
311 		  offsetof(struct task_struct, thread.fstate.fcsr)
312 		- offsetof(struct task_struct, thread.fstate.f[0])
313 	);
314 
315 	/* The assembler needs access to THREAD_SIZE as well. */
316 	DEFINE(ASM_THREAD_SIZE, THREAD_SIZE);
317 
318 	/*
319 	 * We allocate a pt_regs on the stack when entering the kernel.  This
320 	 * ensures the alignment is sane.
321 	 */
322 	DEFINE(PT_SIZE_ON_STACK, ALIGN(sizeof(struct pt_regs), STACK_ALIGN));
323 }
324