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1 | /* Copyright (C) 2005-2012 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 ip1 x17 | |
26 | #define lr x30 | |
27 | ||
28 | .text | |
29 | .globl _dl_runtime_resolve | |
30 | .type _dl_runtime_resolve, #function | |
31 | cfi_startproc | |
32 | .align 2 | |
33 | _dl_runtime_resolve: | |
34 | /* AArch64 we get called with: | |
35 | ip0 &PLTGOT[2] | |
36 | ip1 temp(dl resolver entry point) | |
37 | [sp, #8] lr | |
38 | [sp, #0] &PLTGOT[n] | |
39 | */ | |
40 | ||
41 | cfi_rel_offset (lr, 8) | |
42 | ||
43 | /* Save arguments. */ | |
44 | stp x8, x9, [sp, #-80]! | |
45 | cfi_adjust_cfa_offset (80) | |
46 | cfi_rel_offset (x8, 0) | |
47 | cfi_rel_offset (x9, 8) | |
48 | ||
49 | stp x6, x7, [sp, #16] | |
50 | cfi_rel_offset (x6, 16) | |
51 | cfi_rel_offset (x7, 24) | |
52 | ||
53 | stp x4, x5, [sp, #32] | |
54 | cfi_rel_offset (x4, 32) | |
55 | cfi_rel_offset (x5, 40) | |
56 | ||
57 | stp x2, x3, [sp, #48] | |
58 | cfi_rel_offset (x2, 48) | |
59 | cfi_rel_offset (x3, 56) | |
60 | ||
61 | stp x0, x1, [sp, #64] | |
62 | cfi_rel_offset (x0, 64) | |
63 | cfi_rel_offset (x1, 72) | |
64 | ||
65 | /* Get pointer to linker struct. */ | |
66 | ldr x0, [ip0, #-8] | |
67 | ||
68 | /* Prepare to call _dl_fixup(). */ | |
69 | ldr x1, [sp, 80] /* Recover &PLTGOT[n] */ | |
70 | ||
71 | sub x1, x1, ip0 | |
72 | add x1, x1, x1, lsl #1 | |
73 | lsl x1, x1, #3 | |
74 | sub x1, x1, #192 | |
75 | lsr x1, x1, #3 | |
76 | ||
77 | /* Call fixup routine. */ | |
78 | bl _dl_fixup | |
79 | ||
80 | /* Save the return. */ | |
81 | mov ip0, x0 | |
82 | ||
83 | /* Get arguments and return address back. */ | |
84 | ldp x0, x1, [sp, #64] | |
85 | ldp x2, x3, [sp, #48] | |
86 | ldp x4, x5, [sp, #32] | |
87 | ldp x6, x7, [sp, #16] | |
88 | ldp x8, x9, [sp], #80 | |
89 | cfi_adjust_cfa_offset (-80) | |
90 | ||
91 | ldp ip1, lr, [sp], #16 | |
92 | cfi_adjust_cfa_offset (-16) | |
93 | ||
94 | /* Jump to the newly found address. */ | |
95 | br ip0 | |
96 | ||
97 | cfi_endproc | |
98 | .size _dl_runtime_resolve, .-_dl_runtime_resolve | |
99 | #ifndef PROF | |
100 | .globl _dl_runtime_profile | |
101 | .type _dl_runtime_profile, #function | |
102 | cfi_startproc | |
103 | .align 2 | |
104 | _dl_runtime_profile: | |
105 | /* AArch64 we get called with: | |
106 | ip0 &PLTGOT[2] | |
107 | ip1 temp(dl resolver entry point) | |
108 | [sp, #8] lr | |
109 | [sp, #0] &PLTGOT[n] | |
110 | ||
111 | Stack frame layout: | |
112 | [sp, #...] lr | |
113 | [sp, #...] &PLTGOT[n] | |
114 | [sp, #96] La_aarch64_regs | |
115 | [sp, #48] La_aarch64_retval | |
116 | [sp, #40] frame size return from pltenter | |
117 | [sp, #32] dl_profile_call saved x1 | |
118 | [sp, #24] dl_profile_call saved x0 | |
119 | [sp, #16] t1 | |
120 | [sp, #0] x29, lr <- x29 | |
121 | */ | |
122 | ||
123 | # define OFFSET_T1 16 | |
124 | # define OFFSET_SAVED_CALL_X0 OFFSET_T1 + 8 | |
125 | # define OFFSET_FS OFFSET_SAVED_CALL_X0 + 16 | |
126 | # define OFFSET_RV OFFSET_FS + 8 | |
127 | # define OFFSET_RG OFFSET_RV + DL_SIZEOF_RV | |
128 | ||
129 | # define SF_SIZE OFFSET_RG + DL_SIZEOF_RG | |
130 | ||
131 | # define OFFSET_PLTGOTN SF_SIZE | |
132 | # define OFFSET_LR OFFSET_PLTGOTN + 8 | |
133 | ||
134 | /* Save arguments. */ | |
135 | sub sp, sp, #SF_SIZE | |
136 | cfi_adjust_cfa_offset (SF_SIZE) | |
137 | stp x29, x30, [SP, #0] | |
138 | mov x29, sp | |
139 | cfi_def_cfa_register (x29) | |
140 | cfi_rel_offset (x29, 0) | |
141 | cfi_rel_offset (lr, 8) | |
142 | ||
143 | stp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0] | |
144 | cfi_rel_offset (x0, OFFSET_RG + DL_OFFSET_RG_X0 + 16*0 + 0) | |
145 | cfi_rel_offset (x1, OFFSET_RG + DL_OFFSET_RG_X0 + 16*0 + 8) | |
146 | stp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1] | |
147 | cfi_rel_offset (x2, OFFSET_RG + DL_OFFSET_RG_X0 + 16*1 + 0) | |
148 | cfi_rel_offset (x3, OFFSET_RG + DL_OFFSET_RG_X0 + 16*1 + 8) | |
149 | stp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2] | |
150 | cfi_rel_offset (x4, OFFSET_RG + DL_OFFSET_RG_X0 + 16*2 + 0) | |
151 | cfi_rel_offset (x5, OFFSET_RG + DL_OFFSET_RG_X0 + 16*2 + 8) | |
152 | stp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3] | |
153 | cfi_rel_offset (x6, OFFSET_RG + DL_OFFSET_RG_X0 + 16*3 + 0) | |
154 | cfi_rel_offset (x7, OFFSET_RG + DL_OFFSET_RG_X0 + 16*3 + 8) | |
155 | ||
156 | stp d0, d1, [X29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*0] | |
157 | cfi_rel_offset (d0, OFFSET_RG + DL_OFFSET_RG_D0 + 16*0) | |
158 | cfi_rel_offset (d1, OFFSET_RG + DL_OFFSET_RG_D0 + 16*0 + 8) | |
159 | stp d2, d3, [X29, #OFFSET_RG+ DL_OFFSET_RG_D0 + 16*1] | |
160 | cfi_rel_offset (d2, OFFSET_RG + DL_OFFSET_RG_D0 + 16*1 + 0) | |
161 | cfi_rel_offset (d3, OFFSET_RG + DL_OFFSET_RG_D0 + 16*1 + 8) | |
162 | stp d4, d5, [X29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*2] | |
163 | cfi_rel_offset (d4, OFFSET_RG + DL_OFFSET_RG_D0 + 16*2 + 0) | |
164 | cfi_rel_offset (d5, OFFSET_RG + DL_OFFSET_RG_D0 + 16*2 + 8) | |
165 | stp d6, d7, [X29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*3] | |
166 | cfi_rel_offset (d6, OFFSET_RG + DL_OFFSET_RG_D0 + 16*3 + 0) | |
167 | cfi_rel_offset (d7, OFFSET_RG + DL_OFFSET_RG_D0 + 16*3 + 8) | |
168 | ||
169 | add x0, x29, #SF_SIZE + 16 | |
170 | ldr x1, [x29, #OFFSET_LR] | |
171 | stp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_SP] | |
172 | ||
173 | /* Get pointer to linker struct. */ | |
174 | ldr x0, [ip0, #-8] | |
175 | ||
176 | /* Prepare to call _dl_profile_fixup(). */ | |
177 | ldr x1, [x29, OFFSET_PLTGOTN] /* Recover &PLTGOT[n] */ | |
178 | ||
179 | sub x1, x1, ip0 | |
180 | add x1, x1, x1, lsl #1 | |
181 | lsl x1, x1, #3 | |
182 | sub x1, x1, #192 | |
183 | lsr x1, x1, #3 | |
184 | ||
185 | stp x0, x1, [x29, #OFFSET_SAVED_CALL_X0] | |
186 | ||
187 | /* Set up extra args for _dl_profile_fixup */ | |
188 | ldr x2, [x29, #OFFSET_LR] /* load saved LR */ | |
189 | add x3, x29, #OFFSET_RG /* address of La_aarch64_reg */ | |
190 | add x4, x29, #OFFSET_FS /* address of framesize */ | |
191 | bl _dl_profile_fixup | |
192 | ||
193 | ldr ip0, [x29, #OFFSET_FS] /* framesize == 0 */ | |
194 | cmp ip0, #0 | |
195 | bge 1f | |
196 | cfi_remember_state | |
197 | ||
198 | /* Save the return. */ | |
199 | mov ip0, x0 | |
200 | ||
201 | /* Get arguments and return address back. */ | |
202 | ldp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0] | |
203 | ldp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1] | |
204 | ldp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2] | |
205 | ldp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3] | |
206 | ldp d0, d1, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*0] | |
207 | ldp d2, d3, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*1] | |
208 | ldp d4, d5, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*2] | |
209 | ldp d6, d7, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*3] | |
210 | ||
211 | cfi_def_cfa_register (sp) | |
212 | ldp x29, x30, [x29, #0] | |
213 | cfi_restore(x29) | |
214 | cfi_restore(x30) | |
215 | ||
216 | add sp, sp, SF_SIZE + 16 | |
217 | cfi_adjust_cfa_offset (- SF_SIZE - 16) | |
218 | ||
219 | /* Jump to the newly found address. */ | |
220 | br ip0 | |
221 | ||
222 | cfi_restore_state | |
223 | 1: | |
224 | /* The new frame size is in ip0. */ | |
225 | ||
226 | sub x1, x29, ip0 | |
227 | and sp, x1, #0xfffffffffffffff0 | |
228 | ||
229 | str x0, [x29, #OFFSET_T1] | |
230 | ||
231 | mov x0, sp | |
232 | add x1, x29, #SF_SIZE + 16 | |
233 | mov x2, ip0 | |
234 | bl memcpy | |
235 | ||
236 | ldr ip0, [x29, #OFFSET_T1] | |
237 | ||
238 | /* Call the function. */ | |
239 | ldp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0] | |
240 | ldp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1] | |
241 | ldp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2] | |
242 | ldp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3] | |
243 | ldp d0, d1, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*0] | |
244 | ldp d2, d3, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*1] | |
245 | ldp d4, d5, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*2] | |
246 | ldp d6, d7, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*3] | |
247 | blr ip0 | |
248 | stp x0, x1, [x29, #OFFSET_RV + DL_OFFSET_RV_X0] | |
249 | stp d0, d1, [x29, #OFFSET_RV + DL_OFFSET_RV_D0 + 16*0] | |
250 | stp d2, d3, [x29, #OFFSET_RV + DL_OFFSET_RV_D0 + 16*1] | |
251 | ||
252 | /* Setup call to pltexit */ | |
253 | ldp x0, x1, [x29, #OFFSET_SAVED_CALL_X0] | |
254 | add x2, x29, #OFFSET_RG | |
255 | add x3, x29, #OFFSET_RV | |
256 | bl _dl_call_pltexit | |
257 | ||
258 | ldp x0, x1, [x29, #OFFSET_RV + DL_OFFSET_RV_X0] | |
259 | ldp d0, d1, [x29, #OFFSET_RV + DL_OFFSET_RV_D0 + 16*0] | |
260 | ldp d2, d3, [x29, #OFFSET_RV + DL_OFFSET_RV_D0 + 16*1] | |
261 | /* LR from within La_aarch64_reg */ | |
262 | ldr lr, [x29, #OFFSET_RG + DL_OFFSET_RG_LR] | |
263 | cfi_restore(lr) | |
264 | mov sp, x29 | |
265 | cfi_def_cfa_register (sp) | |
266 | ldr x29, [x29, #0] | |
267 | cfi_restore(x29) | |
268 | add sp, sp, SF_SIZE + 16 | |
269 | cfi_adjust_cfa_offset (- SF_SIZE - 16) | |
270 | ||
271 | br lr | |
272 | ||
273 | cfi_endproc | |
274 | .size _dl_runtime_profile, .-_dl_runtime_profile | |
275 | #endif | |
276 | .previous |