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1/* Copyright (C) 2005-2019 Free Software Foundation, Inc.
2
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public License as
7 published by the Free Software Foundation; either version 2.1 of the
8 License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library. If not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <sysdep.h>
20#include <libc-symbols.h>
21
22#include "dl-link.h"
23
24#define ip0 x16
25#define ip0l PTR_REG (16)
26#define ip1 x17
27#define lr x30
28
29/* RELA relocatons are 3 pointers */
30#define RELA_SIZE (PTR_SIZE * 3)
31
32 .text
33 .globl _dl_runtime_resolve
34 .type _dl_runtime_resolve, #function
35 cfi_startproc
36 .align 2
37_dl_runtime_resolve:
38 /* AArch64 we get called with:
39 ip0 &PLTGOT[2]
40 ip1 temp(dl resolver entry point)
41 [sp, #8] lr
42 [sp, #0] &PLTGOT[n]
43 */
44
45 cfi_rel_offset (lr, 8)
46
47 /* Save arguments. */
48 stp x8, x9, [sp, #-(80+8*16)]!
49 cfi_adjust_cfa_offset (80+8*16)
50 cfi_rel_offset (x8, 0)
51 cfi_rel_offset (x9, 8)
52
53 stp x6, x7, [sp, #16]
54 cfi_rel_offset (x6, 16)
55 cfi_rel_offset (x7, 24)
56
57 stp x4, x5, [sp, #32]
58 cfi_rel_offset (x4, 32)
59 cfi_rel_offset (x5, 40)
60
61 stp x2, x3, [sp, #48]
62 cfi_rel_offset (x2, 48)
63 cfi_rel_offset (x3, 56)
64
65 stp x0, x1, [sp, #64]
66 cfi_rel_offset (x0, 64)
67 cfi_rel_offset (x1, 72)
68
69 stp q0, q1, [sp, #(80+0*16)]
70 cfi_rel_offset (q0, 80+0*16)
71 cfi_rel_offset (q1, 80+1*16)
72
73 stp q2, q3, [sp, #(80+2*16)]
74 cfi_rel_offset (q0, 80+2*16)
75 cfi_rel_offset (q1, 80+3*16)
76
77 stp q4, q5, [sp, #(80+4*16)]
78 cfi_rel_offset (q0, 80+4*16)
79 cfi_rel_offset (q1, 80+5*16)
80
81 stp q6, q7, [sp, #(80+6*16)]
82 cfi_rel_offset (q0, 80+6*16)
83 cfi_rel_offset (q1, 80+7*16)
84
85 /* Get pointer to linker struct. */
86 ldr PTR_REG (0), [ip0, #-PTR_SIZE]
87
88 /* Prepare to call _dl_fixup(). */
89 ldr x1, [sp, 80+8*16] /* Recover &PLTGOT[n] */
90
91 sub x1, x1, ip0
92 add x1, x1, x1, lsl #1
93 lsl x1, x1, #3
94 sub x1, x1, #(RELA_SIZE<<3)
95 lsr x1, x1, #3
96
97 /* Call fixup routine. */
98 bl _dl_fixup
99
100 /* Save the return. */
101 mov ip0, x0
102
103 /* Get arguments and return address back. */
104 ldp q0, q1, [sp, #(80+0*16)]
105 ldp q2, q3, [sp, #(80+2*16)]
106 ldp q4, q5, [sp, #(80+4*16)]
107 ldp q6, q7, [sp, #(80+6*16)]
108 ldp x0, x1, [sp, #64]
109 ldp x2, x3, [sp, #48]
110 ldp x4, x5, [sp, #32]
111 ldp x6, x7, [sp, #16]
112 ldp x8, x9, [sp], #(80+8*16)
113 cfi_adjust_cfa_offset (-(80+8*16))
114
115 ldp ip1, lr, [sp], #16
116 cfi_adjust_cfa_offset (-16)
117
118 /* Jump to the newly found address. */
119 br ip0
120
121 cfi_endproc
122 .size _dl_runtime_resolve, .-_dl_runtime_resolve
123#ifndef PROF
124 .globl _dl_runtime_profile
125 .type _dl_runtime_profile, #function
126 cfi_startproc
127 .align 2
128_dl_runtime_profile:
129 /* AArch64 we get called with:
130 ip0 &PLTGOT[2]
131 ip1 temp(dl resolver entry point)
132 [sp, #8] lr
133 [sp, #0] &PLTGOT[n]
134
135 Stack frame layout:
136 [sp, #...] lr
137 [sp, #...] &PLTGOT[n]
138 [sp, #96] La_aarch64_regs
139 [sp, #48] La_aarch64_retval
140 [sp, #40] frame size return from pltenter
141 [sp, #32] dl_profile_call saved x1
142 [sp, #24] dl_profile_call saved x0
143 [sp, #16] t1
144 [sp, #0] x29, lr <- x29
145 */
146
147# define OFFSET_T1 16
148# define OFFSET_SAVED_CALL_X0 OFFSET_T1 + 8
149# define OFFSET_FS OFFSET_SAVED_CALL_X0 + 16
150# define OFFSET_RV OFFSET_FS + 8
151# define OFFSET_RG OFFSET_RV + DL_SIZEOF_RV
152
153# define SF_SIZE OFFSET_RG + DL_SIZEOF_RG
154
155# define OFFSET_PLTGOTN SF_SIZE
156# define OFFSET_LR OFFSET_PLTGOTN + 8
157
158 /* Save arguments. */
159 sub sp, sp, #SF_SIZE
160 cfi_adjust_cfa_offset (SF_SIZE)
161 stp x29, x30, [SP, #0]
162 mov x29, sp
163 cfi_def_cfa_register (x29)
164 cfi_rel_offset (x29, 0)
165 cfi_rel_offset (lr, 8)
166
167 stp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0]
168 cfi_rel_offset (x0, OFFSET_RG + DL_OFFSET_RG_X0 + 16*0 + 0)
169 cfi_rel_offset (x1, OFFSET_RG + DL_OFFSET_RG_X0 + 16*0 + 8)
170 stp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1]
171 cfi_rel_offset (x2, OFFSET_RG + DL_OFFSET_RG_X0 + 16*1 + 0)
172 cfi_rel_offset (x3, OFFSET_RG + DL_OFFSET_RG_X0 + 16*1 + 8)
173 stp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2]
174 cfi_rel_offset (x4, OFFSET_RG + DL_OFFSET_RG_X0 + 16*2 + 0)
175 cfi_rel_offset (x5, OFFSET_RG + DL_OFFSET_RG_X0 + 16*2 + 8)
176 stp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3]
177 cfi_rel_offset (x6, OFFSET_RG + DL_OFFSET_RG_X0 + 16*3 + 0)
178 cfi_rel_offset (x7, OFFSET_RG + DL_OFFSET_RG_X0 + 16*3 + 8)
179
180 stp d0, d1, [X29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*0]
181 cfi_rel_offset (d0, OFFSET_RG + DL_OFFSET_RG_D0 + 16*0)
182 cfi_rel_offset (d1, OFFSET_RG + DL_OFFSET_RG_D0 + 16*0 + 8)
183 stp d2, d3, [X29, #OFFSET_RG+ DL_OFFSET_RG_D0 + 16*1]
184 cfi_rel_offset (d2, OFFSET_RG + DL_OFFSET_RG_D0 + 16*1 + 0)
185 cfi_rel_offset (d3, OFFSET_RG + DL_OFFSET_RG_D0 + 16*1 + 8)
186 stp d4, d5, [X29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*2]
187 cfi_rel_offset (d4, OFFSET_RG + DL_OFFSET_RG_D0 + 16*2 + 0)
188 cfi_rel_offset (d5, OFFSET_RG + DL_OFFSET_RG_D0 + 16*2 + 8)
189 stp d6, d7, [X29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*3]
190 cfi_rel_offset (d6, OFFSET_RG + DL_OFFSET_RG_D0 + 16*3 + 0)
191 cfi_rel_offset (d7, OFFSET_RG + DL_OFFSET_RG_D0 + 16*3 + 8)
192
193 add x0, x29, #SF_SIZE + 16
194 ldr x1, [x29, #OFFSET_LR]
195 stp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_SP]
196
197 /* Get pointer to linker struct. */
198 ldr PTR_REG (0), [ip0, #-PTR_SIZE]
199
200 /* Prepare to call _dl_profile_fixup(). */
201 ldr x1, [x29, OFFSET_PLTGOTN] /* Recover &PLTGOT[n] */
202
203 sub x1, x1, ip0
204 add x1, x1, x1, lsl #1
205 lsl x1, x1, #3
206 sub x1, x1, #(RELA_SIZE<<3)
207 lsr x1, x1, #3
208
209 stp x0, x1, [x29, #OFFSET_SAVED_CALL_X0]
210
211 /* Set up extra args for _dl_profile_fixup */
212 ldr x2, [x29, #OFFSET_LR] /* load saved LR */
213 add x3, x29, #OFFSET_RG /* address of La_aarch64_reg */
214 add x4, x29, #OFFSET_FS /* address of framesize */
215 bl _dl_profile_fixup
216
217 ldr ip0l, [x29, #OFFSET_FS] /* framesize == 0 */
218 cmp ip0l, #0
219 bge 1f
220 cfi_remember_state
221
222 /* Save the return. */
223 mov ip0, x0
224
225 /* Get arguments and return address back. */
226 ldp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0]
227 ldp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1]
228 ldp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2]
229 ldp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3]
230 ldp d0, d1, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*0]
231 ldp d2, d3, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*1]
232 ldp d4, d5, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*2]
233 ldp d6, d7, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*3]
234
235 cfi_def_cfa_register (sp)
236 ldp x29, x30, [x29, #0]
237 cfi_restore(x29)
238 cfi_restore(x30)
239
240 add sp, sp, SF_SIZE + 16
241 cfi_adjust_cfa_offset (- SF_SIZE - 16)
242
243 /* Jump to the newly found address. */
244 br ip0
245
246 cfi_restore_state
2471:
248 /* The new frame size is in ip0. */
249
250 sub PTR_REG (1), PTR_REG (29), ip0l
251 and sp, x1, #0xfffffffffffffff0
252
253 str x0, [x29, #OFFSET_T1]
254
255 mov x0, sp
256 add x1, x29, #SF_SIZE + 16
257 mov x2, ip0
258 bl memcpy
259
260 ldr ip0, [x29, #OFFSET_T1]
261
262 /* Call the function. */
263 ldp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0]
264 ldp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1]
265 ldp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2]
266 ldp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3]
267 ldp d0, d1, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*0]
268 ldp d2, d3, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*1]
269 ldp d4, d5, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*2]
270 ldp d6, d7, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*3]
271 blr ip0
272 stp x0, x1, [x29, #OFFSET_RV + DL_OFFSET_RV_X0]
273 stp d0, d1, [x29, #OFFSET_RV + DL_OFFSET_RV_D0 + 16*0]
274 stp d2, d3, [x29, #OFFSET_RV + DL_OFFSET_RV_D0 + 16*1]
275
276 /* Setup call to pltexit */
277 ldp x0, x1, [x29, #OFFSET_SAVED_CALL_X0]
278 add x2, x29, #OFFSET_RG
279 add x3, x29, #OFFSET_RV
280 bl _dl_call_pltexit
281
282 ldp x0, x1, [x29, #OFFSET_RV + DL_OFFSET_RV_X0]
283 ldp d0, d1, [x29, #OFFSET_RV + DL_OFFSET_RV_D0 + 16*0]
284 ldp d2, d3, [x29, #OFFSET_RV + DL_OFFSET_RV_D0 + 16*1]
285 /* LR from within La_aarch64_reg */
286 ldr lr, [x29, #OFFSET_RG + DL_OFFSET_RG_LR]
287 cfi_restore(lr)
288 mov sp, x29
289 cfi_def_cfa_register (sp)
290 ldr x29, [x29, #0]
291 cfi_restore(x29)
292 add sp, sp, SF_SIZE + 16
293 cfi_adjust_cfa_offset (- SF_SIZE - 16)
294
295 br lr
296
297 cfi_endproc
298 .size _dl_runtime_profile, .-_dl_runtime_profile
299#endif
300 .previous
301

Warning: That file was not part of the compilation database. It may have many parsing errors.