1 | /* PLT trampolines. x86-64 version. |
2 | Copyright (C) 2009-2024 Free Software Foundation, Inc. |
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 |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the 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 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #ifndef SECTION |
20 | # define SECTION(p) p |
21 | #endif |
22 | |
23 | .section SECTION(.text),"ax" ,@progbits |
24 | #ifdef _dl_runtime_resolve |
25 | |
26 | # undef REGISTER_SAVE_AREA |
27 | # undef LOCAL_STORAGE_AREA |
28 | # undef BASE |
29 | |
30 | # include "dl-trampoline-state.h" |
31 | |
32 | .globl _dl_runtime_resolve |
33 | .hidden _dl_runtime_resolve |
34 | .type _dl_runtime_resolve, @function |
35 | .align 16 |
36 | cfi_startproc |
37 | _dl_runtime_resolve: |
38 | cfi_adjust_cfa_offset(16) # Incorporate PLT |
39 | _CET_ENDBR |
40 | # if DL_RUNTIME_RESOLVE_REALIGN_STACK |
41 | # if LOCAL_STORAGE_AREA != 8 |
42 | # error LOCAL_STORAGE_AREA must be 8 |
43 | # endif |
44 | pushq %rbx # push subtracts stack by 8. |
45 | cfi_adjust_cfa_offset(8) |
46 | cfi_rel_offset(%rbx, 0) |
47 | mov %RSP_LP, %RBX_LP |
48 | cfi_def_cfa_register(%rbx) |
49 | and $-STATE_SAVE_ALIGNMENT, %RSP_LP |
50 | # endif |
51 | # ifdef REGISTER_SAVE_AREA |
52 | sub $REGISTER_SAVE_AREA, %RSP_LP |
53 | # if !DL_RUNTIME_RESOLVE_REALIGN_STACK |
54 | cfi_adjust_cfa_offset(REGISTER_SAVE_AREA) |
55 | # endif |
56 | # else |
57 | # Allocate stack space of the required size to save the state. |
58 | # if IS_IN (rtld) |
59 | sub _rtld_local_ro+RTLD_GLOBAL_RO_DL_X86_CPU_FEATURES_OFFSET+XSAVE_STATE_SIZE_OFFSET(%rip), %RSP_LP |
60 | # else |
61 | sub _dl_x86_cpu_features+XSAVE_STATE_SIZE_OFFSET(%rip), %RSP_LP |
62 | # endif |
63 | # endif |
64 | # Preserve registers otherwise clobbered. |
65 | movq %rax, REGISTER_SAVE_RAX(%rsp) |
66 | movq %rcx, REGISTER_SAVE_RCX(%rsp) |
67 | movq %rdx, REGISTER_SAVE_RDX(%rsp) |
68 | movq %rsi, REGISTER_SAVE_RSI(%rsp) |
69 | movq %rdi, REGISTER_SAVE_RDI(%rsp) |
70 | movq %r8, REGISTER_SAVE_R8(%rsp) |
71 | movq %r9, REGISTER_SAVE_R9(%rsp) |
72 | # ifdef USE_FXSAVE |
73 | fxsave STATE_SAVE_OFFSET(%rsp) |
74 | # else |
75 | movl $STATE_SAVE_MASK, %eax |
76 | xorl %edx, %edx |
77 | # Clear the XSAVE Header. |
78 | # ifdef USE_XSAVE |
79 | movq %rdx, (STATE_SAVE_OFFSET + 512)(%rsp) |
80 | movq %rdx, (STATE_SAVE_OFFSET + 512 + 8)(%rsp) |
81 | # endif |
82 | movq %rdx, (STATE_SAVE_OFFSET + 512 + 8 * 2)(%rsp) |
83 | movq %rdx, (STATE_SAVE_OFFSET + 512 + 8 * 3)(%rsp) |
84 | movq %rdx, (STATE_SAVE_OFFSET + 512 + 8 * 4)(%rsp) |
85 | movq %rdx, (STATE_SAVE_OFFSET + 512 + 8 * 5)(%rsp) |
86 | movq %rdx, (STATE_SAVE_OFFSET + 512 + 8 * 6)(%rsp) |
87 | movq %rdx, (STATE_SAVE_OFFSET + 512 + 8 * 7)(%rsp) |
88 | # ifdef USE_XSAVE |
89 | xsave STATE_SAVE_OFFSET(%rsp) |
90 | # else |
91 | xsavec STATE_SAVE_OFFSET(%rsp) |
92 | # endif |
93 | # endif |
94 | # Copy args pushed by PLT in register. |
95 | # %rdi: link_map, %rsi: reloc_index |
96 | mov (LOCAL_STORAGE_AREA + 8)(%BASE), %RSI_LP |
97 | mov LOCAL_STORAGE_AREA(%BASE), %RDI_LP |
98 | call _dl_fixup # Call resolver. |
99 | mov %RAX_LP, %R11_LP # Save return value |
100 | # Get register content back. |
101 | # ifdef USE_FXSAVE |
102 | fxrstor STATE_SAVE_OFFSET(%rsp) |
103 | # else |
104 | movl $STATE_SAVE_MASK, %eax |
105 | xorl %edx, %edx |
106 | xrstor STATE_SAVE_OFFSET(%rsp) |
107 | # endif |
108 | movq REGISTER_SAVE_R9(%rsp), %r9 |
109 | movq REGISTER_SAVE_R8(%rsp), %r8 |
110 | movq REGISTER_SAVE_RDI(%rsp), %rdi |
111 | movq REGISTER_SAVE_RSI(%rsp), %rsi |
112 | movq REGISTER_SAVE_RDX(%rsp), %rdx |
113 | movq REGISTER_SAVE_RCX(%rsp), %rcx |
114 | movq REGISTER_SAVE_RAX(%rsp), %rax |
115 | # if DL_RUNTIME_RESOLVE_REALIGN_STACK |
116 | mov %RBX_LP, %RSP_LP |
117 | cfi_def_cfa_register(%rsp) |
118 | movq (%rsp), %rbx |
119 | cfi_restore(%rbx) |
120 | # endif |
121 | # Adjust stack(PLT did 2 pushes) |
122 | add $(LOCAL_STORAGE_AREA + 16), %RSP_LP |
123 | cfi_adjust_cfa_offset(-(LOCAL_STORAGE_AREA + 16)) |
124 | jmp *%r11 # Jump to function address. |
125 | cfi_endproc |
126 | .size _dl_runtime_resolve, .-_dl_runtime_resolve |
127 | #endif |
128 | |
129 | |
130 | #if !defined PROF && defined _dl_runtime_profile |
131 | # if (LR_VECTOR_OFFSET % VEC_SIZE) != 0 |
132 | # error LR_VECTOR_OFFSET must be multiple of VEC_SIZE |
133 | # endif |
134 | |
135 | .globl _dl_runtime_profile |
136 | .hidden _dl_runtime_profile |
137 | .type _dl_runtime_profile, @function |
138 | .align 16 |
139 | _dl_runtime_profile: |
140 | cfi_startproc |
141 | cfi_adjust_cfa_offset(16) # Incorporate PLT |
142 | _CET_ENDBR |
143 | /* The La_x86_64_regs data structure pointed to by the |
144 | fourth parameter must be VEC_SIZE-byte aligned. This must |
145 | be explicitly enforced. We have the set up a dynamically |
146 | sized stack frame. %rbx points to the top half which |
147 | has a fixed size and preserves the original stack pointer. */ |
148 | |
149 | sub $32, %RSP_LP # Allocate the local storage. |
150 | cfi_adjust_cfa_offset(32) |
151 | movq %rbx, (%rsp) |
152 | cfi_rel_offset(%rbx, 0) |
153 | |
154 | /* On the stack: |
155 | 56(%rbx) parameter #1 |
156 | 48(%rbx) return address |
157 | |
158 | 40(%rbx) reloc index |
159 | 32(%rbx) link_map |
160 | |
161 | 24(%rbx) La_x86_64_regs pointer |
162 | 16(%rbx) framesize |
163 | 8(%rbx) rax |
164 | (%rbx) rbx |
165 | */ |
166 | |
167 | movq %rax, 8(%rsp) |
168 | mov %RSP_LP, %RBX_LP |
169 | cfi_def_cfa_register(%rbx) |
170 | |
171 | /* Actively align the La_x86_64_regs structure. */ |
172 | and $-VEC_SIZE, %RSP_LP |
173 | /* sizeof(La_x86_64_regs). Need extra space for 8 SSE registers |
174 | to detect if any xmm0-xmm7 registers are changed by audit |
175 | module. */ |
176 | sub $(LR_SIZE + XMM_SIZE*8), %RSP_LP |
177 | movq %rsp, 24(%rbx) |
178 | |
179 | /* Fill the La_x86_64_regs structure. */ |
180 | movq %rdx, LR_RDX_OFFSET(%rsp) |
181 | movq %r8, LR_R8_OFFSET(%rsp) |
182 | movq %r9, LR_R9_OFFSET(%rsp) |
183 | movq %rcx, LR_RCX_OFFSET(%rsp) |
184 | movq %rsi, LR_RSI_OFFSET(%rsp) |
185 | movq %rdi, LR_RDI_OFFSET(%rsp) |
186 | movq %rbp, LR_RBP_OFFSET(%rsp) |
187 | |
188 | lea 48(%rbx), %RAX_LP |
189 | movq %rax, LR_RSP_OFFSET(%rsp) |
190 | |
191 | /* We always store the XMM registers even if AVX is available. |
192 | This is to provide backward binary compatibility for existing |
193 | audit modules. */ |
194 | VMOVA %xmm0, (LR_XMM_OFFSET + XMM_SIZE*0)(%rsp) |
195 | VMOVA %xmm1, (LR_XMM_OFFSET + XMM_SIZE*1)(%rsp) |
196 | VMOVA %xmm2, (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp) |
197 | VMOVA %xmm3, (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp) |
198 | VMOVA %xmm4, (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp) |
199 | VMOVA %xmm5, (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp) |
200 | VMOVA %xmm6, (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp) |
201 | VMOVA %xmm7, (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp) |
202 | |
203 | # ifdef RESTORE_AVX |
204 | /* This is to support AVX audit modules. */ |
205 | VMOVA %VEC(0), (LR_VECTOR_OFFSET + VECTOR_SIZE*0)(%rsp) |
206 | VMOVA %VEC(1), (LR_VECTOR_OFFSET + VECTOR_SIZE*1)(%rsp) |
207 | VMOVA %VEC(2), (LR_VECTOR_OFFSET + VECTOR_SIZE*2)(%rsp) |
208 | VMOVA %VEC(3), (LR_VECTOR_OFFSET + VECTOR_SIZE*3)(%rsp) |
209 | VMOVA %VEC(4), (LR_VECTOR_OFFSET + VECTOR_SIZE*4)(%rsp) |
210 | VMOVA %VEC(5), (LR_VECTOR_OFFSET + VECTOR_SIZE*5)(%rsp) |
211 | VMOVA %VEC(6), (LR_VECTOR_OFFSET + VECTOR_SIZE*6)(%rsp) |
212 | VMOVA %VEC(7), (LR_VECTOR_OFFSET + VECTOR_SIZE*7)(%rsp) |
213 | |
214 | /* Save xmm0-xmm7 registers to detect if any of them are |
215 | changed by audit module. */ |
216 | vmovdqa %xmm0, (LR_SIZE + XMM_SIZE*0)(%rsp) |
217 | vmovdqa %xmm1, (LR_SIZE + XMM_SIZE*1)(%rsp) |
218 | vmovdqa %xmm2, (LR_SIZE + XMM_SIZE*2)(%rsp) |
219 | vmovdqa %xmm3, (LR_SIZE + XMM_SIZE*3)(%rsp) |
220 | vmovdqa %xmm4, (LR_SIZE + XMM_SIZE*4)(%rsp) |
221 | vmovdqa %xmm5, (LR_SIZE + XMM_SIZE*5)(%rsp) |
222 | vmovdqa %xmm6, (LR_SIZE + XMM_SIZE*6)(%rsp) |
223 | vmovdqa %xmm7, (LR_SIZE + XMM_SIZE*7)(%rsp) |
224 | # endif |
225 | |
226 | mov %RSP_LP, %RCX_LP # La_x86_64_regs pointer to %rcx. |
227 | mov 48(%rbx), %RDX_LP # Load return address if needed. |
228 | mov 40(%rbx), %RSI_LP # Copy args pushed by PLT in register. |
229 | mov 32(%rbx), %RDI_LP # %rdi: link_map, %rsi: reloc_index |
230 | lea 16(%rbx), %R8_LP # Address of framesize |
231 | call _dl_profile_fixup # Call resolver. |
232 | |
233 | mov %RAX_LP, %R11_LP # Save return value. |
234 | |
235 | movq 8(%rbx), %rax # Get back register content. |
236 | movq LR_RDX_OFFSET(%rsp), %rdx |
237 | movq LR_R8_OFFSET(%rsp), %r8 |
238 | movq LR_R9_OFFSET(%rsp), %r9 |
239 | |
240 | VMOVA (LR_XMM_OFFSET + XMM_SIZE*0)(%rsp), %xmm0 |
241 | VMOVA (LR_XMM_OFFSET + XMM_SIZE*1)(%rsp), %xmm1 |
242 | VMOVA (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp), %xmm2 |
243 | VMOVA (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp), %xmm3 |
244 | VMOVA (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp), %xmm4 |
245 | VMOVA (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp), %xmm5 |
246 | VMOVA (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp), %xmm6 |
247 | VMOVA (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp), %xmm7 |
248 | |
249 | # ifdef RESTORE_AVX |
250 | /* Check if any xmm0-xmm7 registers are changed by audit |
251 | module. */ |
252 | vpcmpeqb (LR_SIZE)(%rsp), %xmm0, %xmm8 |
253 | vpmovmskb %xmm8, %esi |
254 | incw %si |
255 | je 2f |
256 | vmovdqa %xmm0, (LR_VECTOR_OFFSET)(%rsp) |
257 | jmp 1f |
258 | 2: VMOVA (LR_VECTOR_OFFSET)(%rsp), %VEC(0) |
259 | vmovdqa %xmm0, (LR_XMM_OFFSET)(%rsp) |
260 | |
261 | 1: vpcmpeqb (LR_SIZE + XMM_SIZE)(%rsp), %xmm1, %xmm8 |
262 | vpmovmskb %xmm8, %esi |
263 | incw %si |
264 | je 2f |
265 | vmovdqa %xmm1, (LR_VECTOR_OFFSET + VECTOR_SIZE)(%rsp) |
266 | jmp 1f |
267 | 2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE)(%rsp), %VEC(1) |
268 | vmovdqa %xmm1, (LR_XMM_OFFSET + XMM_SIZE)(%rsp) |
269 | |
270 | 1: vpcmpeqb (LR_SIZE + XMM_SIZE*2)(%rsp), %xmm2, %xmm8 |
271 | vpmovmskb %xmm8, %esi |
272 | incw %si |
273 | je 2f |
274 | vmovdqa %xmm2, (LR_VECTOR_OFFSET + VECTOR_SIZE*2)(%rsp) |
275 | jmp 1f |
276 | 2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*2)(%rsp), %VEC(2) |
277 | vmovdqa %xmm2, (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp) |
278 | |
279 | 1: vpcmpeqb (LR_SIZE + XMM_SIZE*3)(%rsp), %xmm3, %xmm8 |
280 | vpmovmskb %xmm8, %esi |
281 | incw %si |
282 | je 2f |
283 | vmovdqa %xmm3, (LR_VECTOR_OFFSET + VECTOR_SIZE*3)(%rsp) |
284 | jmp 1f |
285 | 2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*3)(%rsp), %VEC(3) |
286 | vmovdqa %xmm3, (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp) |
287 | |
288 | 1: vpcmpeqb (LR_SIZE + XMM_SIZE*4)(%rsp), %xmm4, %xmm8 |
289 | vpmovmskb %xmm8, %esi |
290 | incw %si |
291 | je 2f |
292 | vmovdqa %xmm4, (LR_VECTOR_OFFSET + VECTOR_SIZE*4)(%rsp) |
293 | jmp 1f |
294 | 2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*4)(%rsp), %VEC(4) |
295 | vmovdqa %xmm4, (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp) |
296 | |
297 | 1: vpcmpeqb (LR_SIZE + XMM_SIZE*5)(%rsp), %xmm5, %xmm8 |
298 | vpmovmskb %xmm8, %esi |
299 | incw %si |
300 | je 2f |
301 | vmovdqa %xmm5, (LR_VECTOR_OFFSET + VECTOR_SIZE*5)(%rsp) |
302 | jmp 1f |
303 | 2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*5)(%rsp), %VEC(5) |
304 | vmovdqa %xmm5, (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp) |
305 | |
306 | 1: vpcmpeqb (LR_SIZE + XMM_SIZE*6)(%rsp), %xmm6, %xmm8 |
307 | vpmovmskb %xmm8, %esi |
308 | incw %si |
309 | je 2f |
310 | vmovdqa %xmm6, (LR_VECTOR_OFFSET + VECTOR_SIZE*6)(%rsp) |
311 | jmp 1f |
312 | 2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*6)(%rsp), %VEC(6) |
313 | vmovdqa %xmm6, (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp) |
314 | |
315 | 1: vpcmpeqb (LR_SIZE + XMM_SIZE*7)(%rsp), %xmm7, %xmm8 |
316 | vpmovmskb %xmm8, %esi |
317 | incw %si |
318 | je 2f |
319 | vmovdqa %xmm7, (LR_VECTOR_OFFSET + VECTOR_SIZE*7)(%rsp) |
320 | jmp 1f |
321 | 2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*7)(%rsp), %VEC(7) |
322 | vmovdqa %xmm7, (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp) |
323 | |
324 | 1: |
325 | # endif |
326 | |
327 | mov 16(%rbx), %RCX_LP # Anything in framesize? |
328 | test %RCX_LP, %RCX_LP |
329 | jns 3f |
330 | |
331 | /* There's nothing in the frame size, so there |
332 | will be no call to the _dl_audit_pltexit. */ |
333 | |
334 | /* Get back registers content. */ |
335 | movq LR_RCX_OFFSET(%rsp), %rcx |
336 | movq LR_RSI_OFFSET(%rsp), %rsi |
337 | movq LR_RDI_OFFSET(%rsp), %rdi |
338 | |
339 | mov %RBX_LP, %RSP_LP |
340 | movq (%rsp), %rbx |
341 | cfi_restore(%rbx) |
342 | cfi_def_cfa_register(%rsp) |
343 | |
344 | add $48, %RSP_LP # Adjust the stack to the return value |
345 | # (eats the reloc index and link_map) |
346 | cfi_adjust_cfa_offset(-48) |
347 | jmp *%r11 # Jump to function address. |
348 | |
349 | 3: |
350 | cfi_adjust_cfa_offset(48) |
351 | cfi_rel_offset(%rbx, 0) |
352 | cfi_def_cfa_register(%rbx) |
353 | |
354 | /* At this point we need to prepare new stack for the function |
355 | which has to be called. We copy the original stack to a |
356 | temporary buffer of the size specified by the 'framesize' |
357 | returned from _dl_profile_fixup */ |
358 | |
359 | lea LR_RSP_OFFSET(%rbx), %RSI_LP # stack |
360 | add $8, %RCX_LP |
361 | and $-16, %RCX_LP |
362 | sub %RCX_LP, %RSP_LP |
363 | mov %RSP_LP, %RDI_LP |
364 | rep movsb |
365 | |
366 | movq 24(%rdi), %rcx # Get back register content. |
367 | movq 32(%rdi), %rsi |
368 | movq 40(%rdi), %rdi |
369 | |
370 | call *%r11 |
371 | |
372 | mov 24(%rbx), %RSP_LP # Drop the copied stack content |
373 | |
374 | /* Now we have to prepare the La_x86_64_retval structure for the |
375 | _dl_audit_pltexit. The La_x86_64_regs is being pointed by rsp now, |
376 | so we just need to allocate the sizeof(La_x86_64_retval) space on |
377 | the stack, since the alignment has already been taken care of. */ |
378 | # ifdef RESTORE_AVX |
379 | /* sizeof(La_x86_64_retval). Need extra space for 2 SSE |
380 | registers to detect if xmm0/xmm1 registers are changed |
381 | by audit module. Since rsp is aligned to VEC_SIZE, we |
382 | need to make sure that the address of La_x86_64_retval + |
383 | LRV_VECTOR0_OFFSET is aligned to VEC_SIZE. */ |
384 | # define LRV_SPACE (LRV_SIZE + XMM_SIZE*2) |
385 | # define LRV_MISALIGNED ((LRV_SIZE + LRV_VECTOR0_OFFSET) & (VEC_SIZE - 1)) |
386 | # if LRV_MISALIGNED == 0 |
387 | sub $LRV_SPACE, %RSP_LP |
388 | # else |
389 | sub $(LRV_SPACE + VEC_SIZE - LRV_MISALIGNED), %RSP_LP |
390 | # endif |
391 | # else |
392 | sub $LRV_SIZE, %RSP_LP # sizeof(La_x86_64_retval) |
393 | # endif |
394 | mov %RSP_LP, %RCX_LP # La_x86_64_retval argument to %rcx. |
395 | |
396 | /* Fill in the La_x86_64_retval structure. */ |
397 | movq %rax, LRV_RAX_OFFSET(%rcx) |
398 | movq %rdx, LRV_RDX_OFFSET(%rcx) |
399 | |
400 | VMOVA %xmm0, LRV_XMM0_OFFSET(%rcx) |
401 | VMOVA %xmm1, LRV_XMM1_OFFSET(%rcx) |
402 | |
403 | # ifdef RESTORE_AVX |
404 | /* This is to support AVX audit modules. */ |
405 | VMOVA %VEC(0), LRV_VECTOR0_OFFSET(%rcx) |
406 | VMOVA %VEC(1), LRV_VECTOR1_OFFSET(%rcx) |
407 | |
408 | /* Save xmm0/xmm1 registers to detect if they are changed |
409 | by audit module. */ |
410 | vmovdqa %xmm0, (LRV_SIZE + XMM_SIZE*0)(%rcx) |
411 | vmovdqa %xmm1, (LRV_SIZE + XMM_SIZE*1)(%rcx) |
412 | # endif |
413 | |
414 | fstpt LRV_ST0_OFFSET(%rcx) |
415 | fstpt LRV_ST1_OFFSET(%rcx) |
416 | |
417 | movq 24(%rbx), %rdx # La_x86_64_regs argument to %rdx. |
418 | movq 40(%rbx), %rsi # Copy args pushed by PLT in register. |
419 | movq 32(%rbx), %rdi # %rdi: link_map, %rsi: reloc_index |
420 | call _dl_audit_pltexit |
421 | |
422 | /* Restore return registers. */ |
423 | movq LRV_RAX_OFFSET(%rsp), %rax |
424 | movq LRV_RDX_OFFSET(%rsp), %rdx |
425 | |
426 | VMOVA LRV_XMM0_OFFSET(%rsp), %xmm0 |
427 | VMOVA LRV_XMM1_OFFSET(%rsp), %xmm1 |
428 | |
429 | # ifdef RESTORE_AVX |
430 | /* Check if xmm0/xmm1 registers are changed by audit module. */ |
431 | vpcmpeqb (LRV_SIZE)(%rsp), %xmm0, %xmm2 |
432 | vpmovmskb %xmm2, %esi |
433 | incw %si |
434 | jne 1f |
435 | VMOVA LRV_VECTOR0_OFFSET(%rsp), %VEC(0) |
436 | |
437 | 1: vpcmpeqb (LRV_SIZE + XMM_SIZE)(%rsp), %xmm1, %xmm2 |
438 | vpmovmskb %xmm2, %esi |
439 | incw %si |
440 | jne 1f |
441 | VMOVA LRV_VECTOR1_OFFSET(%rsp), %VEC(1) |
442 | |
443 | 1: |
444 | # endif |
445 | |
446 | fldt LRV_ST1_OFFSET(%rsp) |
447 | fldt LRV_ST0_OFFSET(%rsp) |
448 | |
449 | mov %RBX_LP, %RSP_LP |
450 | movq (%rsp), %rbx |
451 | cfi_restore(%rbx) |
452 | cfi_def_cfa_register(%rsp) |
453 | |
454 | add $48, %RSP_LP # Adjust the stack to the return value |
455 | # (eats the reloc index and link_map) |
456 | cfi_adjust_cfa_offset(-48) |
457 | retq |
458 | |
459 | cfi_endproc |
460 | .size _dl_runtime_profile, .-_dl_runtime_profile |
461 | #endif |
462 | |