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
342
343
344
345
346
347
348
349
350
|
/* PLT trampolines. x86-64 version.
Copyright (C) 2004-2014 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
<http://www.gnu.org/licenses/>. */
#include <config.h>
#include <sysdep.h>
#include <link-defines.h>
#if (RTLD_SAVESPACE_SSE % 32) != 0
# error RTLD_SAVESPACE_SSE must be aligned to 32 bytes
#endif
.text
.globl _dl_runtime_resolve
.type _dl_runtime_resolve, @function
.align 16
cfi_startproc
_dl_runtime_resolve:
cfi_adjust_cfa_offset(16) # Incorporate PLT
subq $56,%rsp
cfi_adjust_cfa_offset(56)
movq %rax,(%rsp) # Preserve registers otherwise clobbered.
movq %rcx, 8(%rsp)
movq %rdx, 16(%rsp)
movq %rsi, 24(%rsp)
movq %rdi, 32(%rsp)
movq %r8, 40(%rsp)
movq %r9, 48(%rsp)
movq 64(%rsp), %rsi # Copy args pushed by PLT in register.
movq 56(%rsp), %rdi # %rdi: link_map, %rsi: reloc_index
call _dl_fixup # Call resolver.
movq %rax, %r11 # Save return value
movq 48(%rsp), %r9 # Get register content back.
movq 40(%rsp), %r8
movq 32(%rsp), %rdi
movq 24(%rsp), %rsi
movq 16(%rsp), %rdx
movq 8(%rsp), %rcx
movq (%rsp), %rax
addq $72, %rsp # Adjust stack(PLT did 2 pushes)
cfi_adjust_cfa_offset(-72)
jmp *%r11 # Jump to function address.
cfi_endproc
.size _dl_runtime_resolve, .-_dl_runtime_resolve
#ifndef PROF
.globl _dl_runtime_profile
.type _dl_runtime_profile, @function
.align 16
cfi_startproc
_dl_runtime_profile:
cfi_adjust_cfa_offset(16) # Incorporate PLT
/* The La_x86_64_regs data structure pointed to by the
fourth paramater must be 16-byte aligned. This must
be explicitly enforced. We have the set up a dynamically
sized stack frame. %rbx points to the top half which
has a fixed size and preserves the original stack pointer. */
subq $32, %rsp # Allocate the local storage.
cfi_adjust_cfa_offset(32)
movq %rbx, (%rsp)
cfi_rel_offset(%rbx, 0)
/* On the stack:
56(%rbx) parameter #1
48(%rbx) return address
40(%rbx) reloc index
32(%rbx) link_map
24(%rbx) La_x86_64_regs pointer
16(%rbx) framesize
8(%rbx) rax
(%rbx) rbx
*/
movq %rax, 8(%rsp)
movq %rsp, %rbx
cfi_def_cfa_register(%rbx)
/* Actively align the La_x86_64_regs structure. */
andq $0xfffffffffffffff0, %rsp
# if defined HAVE_AVX_SUPPORT || defined HAVE_AVX512_ASM_SUPPORT
/* sizeof(La_x86_64_regs). Need extra space for 8 SSE registers
to detect if any xmm0-xmm7 registers are changed by audit
module. */
subq $(LR_SIZE + XMM_SIZE*8), %rsp
# else
subq $LR_SIZE, %rsp # sizeof(La_x86_64_regs)
# endif
movq %rsp, 24(%rbx)
/* Fill the La_x86_64_regs structure. */
movq %rdx, LR_RDX_OFFSET(%rsp)
movq %r8, LR_R8_OFFSET(%rsp)
movq %r9, LR_R9_OFFSET(%rsp)
movq %rcx, LR_RCX_OFFSET(%rsp)
movq %rsi, LR_RSI_OFFSET(%rsp)
movq %rdi, LR_RDI_OFFSET(%rsp)
movq %rbp, LR_RBP_OFFSET(%rsp)
leaq 48(%rbx), %rax
movq %rax, LR_RSP_OFFSET(%rsp)
/* We always store the XMM registers even if AVX is available.
This is to provide backward binary compatibility for existing
audit modules. */
movaps %xmm0, (LR_XMM_OFFSET)(%rsp)
movaps %xmm1, (LR_XMM_OFFSET + XMM_SIZE)(%rsp)
movaps %xmm2, (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp)
movaps %xmm3, (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp)
movaps %xmm4, (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp)
movaps %xmm5, (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp)
movaps %xmm6, (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp)
movaps %xmm7, (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp)
# if defined HAVE_AVX_SUPPORT || defined HAVE_AVX512_ASM_SUPPORT
.data
L(have_avx):
.zero 4
.size L(have_avx), 4
.previous
cmpl $0, L(have_avx)(%rip)
jne L(defined)
movq %rbx, %r11 # Save rbx
movl $1, %eax
cpuid
movq %r11,%rbx # Restore rbx
xorl %eax, %eax
// AVX and XSAVE supported?
andl $((1 << 28) | (1 << 27)), %ecx
cmpl $((1 << 28) | (1 << 27)), %ecx
jne 10f
# ifdef HAVE_AVX512_ASM_SUPPORT
// AVX512 supported in processor?
movq %rbx, %r11 # Save rbx
xorl %ecx, %ecx
mov $0x7, %eax
cpuid
andl $(1 << 16), %ebx
# endif
xorl %ecx, %ecx
// Get XFEATURE_ENABLED_MASK
xgetbv
# ifdef HAVE_AVX512_ASM_SUPPORT
test %ebx, %ebx
movq %r11, %rbx # Restore rbx
je 20f
// Verify that XCR0[7:5] = '111b' and
// XCR0[2:1] = '11b' which means
// that zmm state is enabled
andl $0xe6, %eax
cmpl $0xe6, %eax
jne 20f
movl %eax, L(have_avx)(%rip)
L(avx512):
# define RESTORE_AVX
# define VMOV vmovdqu64
# define VEC(i) zmm##i
# define MORE_CODE
# include "dl-trampoline.h"
# undef VMOV
# undef VEC
# undef RESTORE_AVX
# endif
20: andl $0x6, %eax
10: subl $0x5, %eax
movl %eax, L(have_avx)(%rip)
cmpl $0, %eax
L(defined):
js L(no_avx)
# ifdef HAVE_AVX512_ASM_SUPPORT
cmpl $0xe6, L(have_avx)(%rip)
je L(avx512)
# endif
# define RESTORE_AVX
# define VMOV vmovdqu
# define VEC(i) ymm##i
# define MORE_CODE
# include "dl-trampoline.h"
.align 16
L(no_avx):
# endif
# undef RESTORE_AVX
# include "dl-trampoline.h"
cfi_endproc
.size _dl_runtime_profile, .-_dl_runtime_profile
#endif
#ifdef SHARED
.globl _dl_x86_64_save_sse
.type _dl_x86_64_save_sse, @function
.align 16
cfi_startproc
_dl_x86_64_save_sse:
# if defined HAVE_AVX_SUPPORT || defined HAVE_AVX512_ASM_SUPPORT
cmpl $0, L(have_avx)(%rip)
jne L(defined_5)
movq %rbx, %r11 # Save rbx
movl $1, %eax
cpuid
movq %r11,%rbx # Restore rbx
xorl %eax, %eax
// AVX and XSAVE supported?
andl $((1 << 28) | (1 << 27)), %ecx
cmpl $((1 << 28) | (1 << 27)), %ecx
jne 1f
# ifdef HAVE_AVX512_ASM_SUPPORT
// AVX512 supported in a processor?
movq %rbx, %r11 # Save rbx
xorl %ecx,%ecx
mov $0x7,%eax
cpuid
andl $(1 << 16), %ebx
# endif
xorl %ecx, %ecx
// Get XFEATURE_ENABLED_MASK
xgetbv
# ifdef HAVE_AVX512_ASM_SUPPORT
test %ebx, %ebx
movq %r11, %rbx # Restore rbx
je 2f
// Verify that XCR0[7:5] = '111b' and
// XCR0[2:1] = '11b' which means
// that zmm state is enabled
andl $0xe6, %eax
movl %eax, L(have_avx)(%rip)
cmpl $0xe6, %eax
je L(avx512_5)
# endif
2: andl $0x6, %eax
1: subl $0x5, %eax
movl %eax, L(have_avx)(%rip)
cmpl $0, %eax
L(defined_5):
js L(no_avx5)
# ifdef HAVE_AVX512_ASM_SUPPORT
cmpl $0xe6, L(have_avx)(%rip)
je L(avx512_5)
# endif
vmovdqa %ymm0, %fs:RTLD_SAVESPACE_SSE+0*YMM_SIZE
vmovdqa %ymm1, %fs:RTLD_SAVESPACE_SSE+1*YMM_SIZE
vmovdqa %ymm2, %fs:RTLD_SAVESPACE_SSE+2*YMM_SIZE
vmovdqa %ymm3, %fs:RTLD_SAVESPACE_SSE+3*YMM_SIZE
vmovdqa %ymm4, %fs:RTLD_SAVESPACE_SSE+4*YMM_SIZE
vmovdqa %ymm5, %fs:RTLD_SAVESPACE_SSE+5*YMM_SIZE
vmovdqa %ymm6, %fs:RTLD_SAVESPACE_SSE+6*YMM_SIZE
vmovdqa %ymm7, %fs:RTLD_SAVESPACE_SSE+7*YMM_SIZE
ret
# ifdef HAVE_AVX512_ASM_SUPPORT
L(avx512_5):
vmovdqu64 %zmm0, %fs:RTLD_SAVESPACE_SSE+0*ZMM_SIZE
vmovdqu64 %zmm1, %fs:RTLD_SAVESPACE_SSE+1*ZMM_SIZE
vmovdqu64 %zmm2, %fs:RTLD_SAVESPACE_SSE+2*ZMM_SIZE
vmovdqu64 %zmm3, %fs:RTLD_SAVESPACE_SSE+3*ZMM_SIZE
vmovdqu64 %zmm4, %fs:RTLD_SAVESPACE_SSE+4*ZMM_SIZE
vmovdqu64 %zmm5, %fs:RTLD_SAVESPACE_SSE+5*ZMM_SIZE
vmovdqu64 %zmm6, %fs:RTLD_SAVESPACE_SSE+6*ZMM_SIZE
vmovdqu64 %zmm7, %fs:RTLD_SAVESPACE_SSE+7*ZMM_SIZE
ret
# endif
L(no_avx5):
# endif
movdqa %xmm0, %fs:RTLD_SAVESPACE_SSE+0*XMM_SIZE
movdqa %xmm1, %fs:RTLD_SAVESPACE_SSE+1*XMM_SIZE
movdqa %xmm2, %fs:RTLD_SAVESPACE_SSE+2*XMM_SIZE
movdqa %xmm3, %fs:RTLD_SAVESPACE_SSE+3*XMM_SIZE
movdqa %xmm4, %fs:RTLD_SAVESPACE_SSE+4*XMM_SIZE
movdqa %xmm5, %fs:RTLD_SAVESPACE_SSE+5*XMM_SIZE
movdqa %xmm6, %fs:RTLD_SAVESPACE_SSE+6*XMM_SIZE
movdqa %xmm7, %fs:RTLD_SAVESPACE_SSE+7*XMM_SIZE
ret
cfi_endproc
.size _dl_x86_64_save_sse, .-_dl_x86_64_save_sse
.globl _dl_x86_64_restore_sse
.type _dl_x86_64_restore_sse, @function
.align 16
cfi_startproc
_dl_x86_64_restore_sse:
# if defined HAVE_AVX_SUPPORT || defined HAVE_AVX512_ASM_SUPPORT
cmpl $0, L(have_avx)(%rip)
js L(no_avx6)
# ifdef HAVE_AVX512_ASM_SUPPORT
cmpl $0xe6, L(have_avx)(%rip)
je L(avx512_6)
# endif
vmovdqa %fs:RTLD_SAVESPACE_SSE+0*YMM_SIZE, %ymm0
vmovdqa %fs:RTLD_SAVESPACE_SSE+1*YMM_SIZE, %ymm1
vmovdqa %fs:RTLD_SAVESPACE_SSE+2*YMM_SIZE, %ymm2
vmovdqa %fs:RTLD_SAVESPACE_SSE+3*YMM_SIZE, %ymm3
vmovdqa %fs:RTLD_SAVESPACE_SSE+4*YMM_SIZE, %ymm4
vmovdqa %fs:RTLD_SAVESPACE_SSE+5*YMM_SIZE, %ymm5
vmovdqa %fs:RTLD_SAVESPACE_SSE+6*YMM_SIZE, %ymm6
vmovdqa %fs:RTLD_SAVESPACE_SSE+7*YMM_SIZE, %ymm7
ret
# ifdef HAVE_AVX512_ASM_SUPPORT
L(avx512_6):
vmovdqu64 %fs:RTLD_SAVESPACE_SSE+0*ZMM_SIZE, %zmm0
vmovdqu64 %fs:RTLD_SAVESPACE_SSE+1*ZMM_SIZE, %zmm1
vmovdqu64 %fs:RTLD_SAVESPACE_SSE+2*ZMM_SIZE, %zmm2
vmovdqu64 %fs:RTLD_SAVESPACE_SSE+3*ZMM_SIZE, %zmm3
vmovdqu64 %fs:RTLD_SAVESPACE_SSE+4*ZMM_SIZE, %zmm4
vmovdqu64 %fs:RTLD_SAVESPACE_SSE+5*ZMM_SIZE, %zmm5
vmovdqu64 %fs:RTLD_SAVESPACE_SSE+6*ZMM_SIZE, %zmm6
vmovdqu64 %fs:RTLD_SAVESPACE_SSE+7*ZMM_SIZE, %zmm7
ret
# endif
L(no_avx6):
# endif
movdqa %fs:RTLD_SAVESPACE_SSE+0*XMM_SIZE, %xmm0
movdqa %fs:RTLD_SAVESPACE_SSE+1*XMM_SIZE, %xmm1
movdqa %fs:RTLD_SAVESPACE_SSE+2*XMM_SIZE, %xmm2
movdqa %fs:RTLD_SAVESPACE_SSE+3*XMM_SIZE, %xmm3
movdqa %fs:RTLD_SAVESPACE_SSE+4*XMM_SIZE, %xmm4
movdqa %fs:RTLD_SAVESPACE_SSE+5*XMM_SIZE, %xmm5
movdqa %fs:RTLD_SAVESPACE_SSE+6*XMM_SIZE, %xmm6
movdqa %fs:RTLD_SAVESPACE_SSE+7*XMM_SIZE, %xmm7
ret
cfi_endproc
.size _dl_x86_64_restore_sse, .-_dl_x86_64_restore_sse
#endif
|
