1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
|
/* Copyright (C) 2005-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <libc-symbols.h>
#include "dl-link.h"
#define ip0 x16
#define ip0l PTR_REG (16)
#define ip1 x17
#define lr x30
/* RELA relocatons are 3 pointers */
#define RELA_SIZE (PTR_SIZE * 3)
.text
.globl _dl_runtime_resolve
.type _dl_runtime_resolve, #function
cfi_startproc
.align 2
_dl_runtime_resolve:
BTI_C
/* AArch64 we get called with:
ip0 &PLTGOT[2]
ip1 temp(dl resolver entry point)
[sp, #8] lr
[sp, #0] &PLTGOT[n]
*/
cfi_rel_offset (lr, 8)
/* Note: Saving x9 is not required by the ABI but the assembler requires
the immediate values of operand 3 to be a multiple of 16 */
stp x8, x9, [sp, #-(80+8*16)]!
cfi_adjust_cfa_offset (80+8*16)
cfi_rel_offset (x8, 0)
cfi_rel_offset (x9, 8)
stp x6, x7, [sp, #16]
cfi_rel_offset (x6, 16)
cfi_rel_offset (x7, 24)
stp x4, x5, [sp, #32]
cfi_rel_offset (x4, 32)
cfi_rel_offset (x5, 40)
stp x2, x3, [sp, #48]
cfi_rel_offset (x2, 48)
cfi_rel_offset (x3, 56)
stp x0, x1, [sp, #64]
cfi_rel_offset (x0, 64)
cfi_rel_offset (x1, 72)
stp q0, q1, [sp, #(80+0*16)]
cfi_rel_offset (q0, 80+0*16)
cfi_rel_offset (q1, 80+1*16)
stp q2, q3, [sp, #(80+2*16)]
cfi_rel_offset (q0, 80+2*16)
cfi_rel_offset (q1, 80+3*16)
stp q4, q5, [sp, #(80+4*16)]
cfi_rel_offset (q0, 80+4*16)
cfi_rel_offset (q1, 80+5*16)
stp q6, q7, [sp, #(80+6*16)]
cfi_rel_offset (q0, 80+6*16)
cfi_rel_offset (q1, 80+7*16)
/* Get pointer to linker struct. */
ldr PTR_REG (0), [ip0, #-PTR_SIZE]
/* Prepare to call _dl_fixup(). */
ldr x1, [sp, 80+8*16] /* Recover &PLTGOT[n] */
sub x1, x1, ip0
add x1, x1, x1, lsl #1
lsl x1, x1, #3
sub x1, x1, #(RELA_SIZE<<3)
lsr x1, x1, #3
/* Call fixup routine. */
bl _dl_fixup
/* Save the return. */
mov ip0, x0
/* Get arguments and return address back. */
ldp q0, q1, [sp, #(80+0*16)]
ldp q2, q3, [sp, #(80+2*16)]
ldp q4, q5, [sp, #(80+4*16)]
ldp q6, q7, [sp, #(80+6*16)]
ldp x0, x1, [sp, #64]
ldp x2, x3, [sp, #48]
ldp x4, x5, [sp, #32]
ldp x6, x7, [sp, #16]
ldp x8, x9, [sp], #(80+8*16)
cfi_adjust_cfa_offset (-(80+8*16))
ldp ip1, lr, [sp], #16
cfi_adjust_cfa_offset (-16)
/* Jump to the newly found address. */
br ip0
cfi_endproc
.size _dl_runtime_resolve, .-_dl_runtime_resolve
#ifndef PROF
.globl _dl_runtime_profile
.type _dl_runtime_profile, #function
cfi_startproc
.align 2
_dl_runtime_profile:
# if HAVE_AARCH64_PAC_RET
PACIASP
cfi_window_save
# else
BTI_C
# endif
/* AArch64 we get called with:
ip0 &PLTGOT[2]
ip1 temp(dl resolver entry point)
[sp, #8] lr
[sp, #0] &PLTGOT[n]
Stack frame layout:
[sp, #...] lr
[sp, #...] &PLTGOT[n]
[sp, #256] La_aarch64_regs
[sp, #48] La_aarch64_retval
[sp, #40] frame size return from pltenter
[sp, #32] dl_profile_call saved x1
[sp, #24] dl_profile_call saved x0
[sp, #16] t1
[sp, #0] x29, lr <- x29
*/
# define OFFSET_T1 16
# define OFFSET_SAVED_CALL_X0 OFFSET_T1 + 8
# define OFFSET_FS OFFSET_SAVED_CALL_X0 + 16
# define OFFSET_RV OFFSET_FS + 8
# define OFFSET_RG OFFSET_RV + DL_SIZEOF_RV
# define SF_SIZE OFFSET_RG + DL_SIZEOF_RG
# define OFFSET_PLTGOTN SF_SIZE
# define OFFSET_LR OFFSET_PLTGOTN + 8
/* Save arguments. */
sub sp, sp, #SF_SIZE
cfi_adjust_cfa_offset (SF_SIZE)
stp x29, x30, [SP, #0]
mov x29, sp
cfi_def_cfa_register (x29)
cfi_rel_offset (x29, 0)
cfi_rel_offset (lr, 8)
stp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0]
cfi_rel_offset (x0, OFFSET_RG + DL_OFFSET_RG_X0 + 16*0 + 0)
cfi_rel_offset (x1, OFFSET_RG + DL_OFFSET_RG_X0 + 16*0 + 8)
stp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1]
cfi_rel_offset (x2, OFFSET_RG + DL_OFFSET_RG_X0 + 16*1 + 0)
cfi_rel_offset (x3, OFFSET_RG + DL_OFFSET_RG_X0 + 16*1 + 8)
stp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2]
cfi_rel_offset (x4, OFFSET_RG + DL_OFFSET_RG_X0 + 16*2 + 0)
cfi_rel_offset (x5, OFFSET_RG + DL_OFFSET_RG_X0 + 16*2 + 8)
stp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3]
cfi_rel_offset (x6, OFFSET_RG + DL_OFFSET_RG_X0 + 16*3 + 0)
cfi_rel_offset (x7, OFFSET_RG + DL_OFFSET_RG_X0 + 16*3 + 8)
str x8, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*4 + 0]
cfi_rel_offset (x8, OFFSET_RG + DL_OFFSET_RG_X0 + 16*4 + 0)
/* Note 8 bytes of padding is in the stack frame for alignment */
stp q0, q1, [X29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*0]
cfi_rel_offset (q0, OFFSET_RG + DL_OFFSET_RG_V0 + 32*0)
cfi_rel_offset (q1, OFFSET_RG + DL_OFFSET_RG_V0 + 32*0 + 16)
stp q2, q3, [X29, #OFFSET_RG+ DL_OFFSET_RG_V0 + 32*1]
cfi_rel_offset (q2, OFFSET_RG + DL_OFFSET_RG_V0 + 32*1 + 0)
cfi_rel_offset (q3, OFFSET_RG + DL_OFFSET_RG_V0 + 32*1 + 16)
stp q4, q5, [X29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*2]
cfi_rel_offset (q4, OFFSET_RG + DL_OFFSET_RG_V0 + 32*2 + 0)
cfi_rel_offset (q5, OFFSET_RG + DL_OFFSET_RG_V0 + 32*2 + 16)
stp q6, q7, [X29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*3]
cfi_rel_offset (q6, OFFSET_RG + DL_OFFSET_RG_V0 + 32*3 + 0)
cfi_rel_offset (q7, OFFSET_RG + DL_OFFSET_RG_V0 + 32*3 + 16)
/* No APCS extension supported. */
str xzr, [X29, #OFFSET_RG + DL_OFFSET_RG_VPCS]
add x0, x29, #SF_SIZE + 16
ldr x1, [x29, #OFFSET_LR]
stp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_SP]
/* Get pointer to linker struct. */
ldr PTR_REG (0), [ip0, #-PTR_SIZE]
/* Prepare to call _dl_profile_fixup(). */
ldr x1, [x29, OFFSET_PLTGOTN] /* Recover &PLTGOT[n] */
sub x1, x1, ip0
add x1, x1, x1, lsl #1
lsl x1, x1, #3
sub x1, x1, #(RELA_SIZE<<3)
lsr x1, x1, #3
stp x0, x1, [x29, #OFFSET_SAVED_CALL_X0]
/* Set up extra args for _dl_profile_fixup */
ldr x2, [x29, #OFFSET_LR] /* load saved LR */
add x3, x29, #OFFSET_RG /* address of La_aarch64_reg */
add x4, x29, #OFFSET_FS /* address of framesize */
bl _dl_profile_fixup
ldr ip0l, [x29, #OFFSET_FS] /* framesize == 0 */
cmp ip0l, #0
bge 1f
cfi_remember_state
/* Save the return. */
mov ip0, x0
/* Get arguments and return address back. */
ldp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0]
ldp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1]
ldp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2]
ldp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3]
ldr x8, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*4]
ldp q0, q1, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*0]
ldp q2, q3, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*1]
ldp q4, q5, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*2]
ldp q6, q7, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*3]
cfi_def_cfa_register (sp)
ldp x29, x30, [x29, #0]
cfi_restore(x29)
cfi_restore(x30)
# if HAVE_AARCH64_PAC_RET
add sp, sp, SF_SIZE
cfi_adjust_cfa_offset (-SF_SIZE)
AUTIASP
cfi_window_save
add sp, sp, 16
cfi_adjust_cfa_offset (-16)
# else
add sp, sp, SF_SIZE + 16
cfi_adjust_cfa_offset (- SF_SIZE - 16)
# endif
/* Jump to the newly found address. */
br ip0
cfi_restore_state
1:
/* The new frame size is in ip0. */
sub PTR_REG (1), PTR_REG (29), ip0l
and sp, x1, #0xfffffffffffffff0
str x0, [x29, #OFFSET_T1]
mov x0, sp
add x1, x29, #SF_SIZE + 16
mov x2, ip0
bl memcpy
ldr ip0, [x29, #OFFSET_T1]
/* Call the function. */
ldp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0]
ldp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1]
ldp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2]
ldp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3]
ldr x8, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*4]
ldp q0, q1, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*0]
ldp q2, q3, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*1]
ldp q4, q5, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*2]
ldp q6, q7, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*3]
blr ip0
stp x0, x1, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*0]
stp x2, x3, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*1]
stp x4, x5, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*2]
stp x6, x7, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*3]
stp q0, q1, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*0]
stp q2, q3, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*1]
stp q4, q5, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*2]
stp q6, q7, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*3]
str xzr, [X29, #OFFSET_RV + DL_OFFSET_RV_VPCS]
/* Setup call to pltexit */
ldp x0, x1, [x29, #OFFSET_SAVED_CALL_X0]
add x2, x29, #OFFSET_RG
add x3, x29, #OFFSET_RV
bl _dl_audit_pltexit
ldp x0, x1, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*0]
ldp x2, x3, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*1]
ldp x4, x5, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*2]
ldp x6, x7, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*3]
ldp q0, q1, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*0]
ldp q2, q3, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*1]
ldp q4, q5, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*2]
ldp q6, q7, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*3]
/* LR from within La_aarch64_reg */
ldr lr, [x29, #OFFSET_RG + DL_OFFSET_RG_LR]
cfi_restore(lr)
# if HAVE_AARCH64_PAC_RET
/* Note: LR restored from La_aarch64_reg has no PAC. */
cfi_window_save
# endif
mov sp, x29
cfi_def_cfa_register (sp)
ldr x29, [x29, #0]
cfi_restore(x29)
add sp, sp, SF_SIZE + 16
cfi_adjust_cfa_offset (- SF_SIZE - 16)
br lr
cfi_endproc
.size _dl_runtime_profile, .-_dl_runtime_profile
#endif
.previous
|
