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
|
/* asm-common-amd64.h - Common macros for AMD64 assembly
*
* Copyright (C) 2018 Jussi Kivilinna <jussi.kivilinna@iki.fi>
*
* This file is part of Libgcrypt.
*
* Libgcrypt 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.
*
* Libgcrypt 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 this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GCRY_ASM_COMMON_AMD64_H
#define GCRY_ASM_COMMON_AMD64_H
#include <config.h>
#ifdef HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS
# define ELF(...) __VA_ARGS__
#else
# define ELF(...) /*_*/
#endif
#ifdef HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS
# define SECTION_RODATA .section .rdata
#else
# define SECTION_RODATA .section .rodata
#endif
#ifdef __PIC__
# define rRIP (%rip)
#else
# define rRIP
#endif
#ifdef __PIC__
# define RIP %rip
#else
# define RIP
#endif
#ifdef __PIC__
# define ADD_RIP +rip
#else
# define ADD_RIP
#endif
#if defined(HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS) || !defined(__PIC__)
# define GET_EXTERN_POINTER(name, reg) movabsq $name, reg
#else
# ifdef __code_model_large__
# define GET_EXTERN_POINTER(name, reg) \
pushq %r15; \
pushq %r14; \
1: leaq 1b(%rip), reg; \
movabsq $_GLOBAL_OFFSET_TABLE_-1b, %r14; \
movabsq $name@GOT, %r15; \
addq %r14, reg; \
popq %r14; \
movq (reg, %r15), reg; \
popq %r15;
# else
# define GET_EXTERN_POINTER(name, reg) movq name@GOTPCREL(%rip), reg
# endif
#endif
#ifdef HAVE_GCC_ASM_CFI_DIRECTIVES
/* CFI directives to emit DWARF stack unwinding information. */
# define CFI_STARTPROC() .cfi_startproc
# define CFI_ENDPROC() .cfi_endproc
# define CFI_REMEMBER_STATE() .cfi_remember_state
# define CFI_RESTORE_STATE() .cfi_restore_state
# define CFI_ADJUST_CFA_OFFSET(off) .cfi_adjust_cfa_offset off
# define CFI_REL_OFFSET(reg,off) .cfi_rel_offset reg, off
# define CFI_DEF_CFA_REGISTER(reg) .cfi_def_cfa_register reg
# define CFI_REGISTER(ro,rn) .cfi_register ro, rn
# define CFI_RESTORE(reg) .cfi_restore reg
# define CFI_PUSH(reg) \
CFI_ADJUST_CFA_OFFSET(8); CFI_REL_OFFSET(reg, 0)
# define CFI_POP(reg) \
CFI_ADJUST_CFA_OFFSET(-8); CFI_RESTORE(reg)
# define CFI_POP_TMP_REG() \
CFI_ADJUST_CFA_OFFSET(-8);
# define CFI_LEAVE() \
CFI_ADJUST_CFA_OFFSET(-8); CFI_DEF_CFA_REGISTER(%rsp)
/* CFA expressions are used for pointing CFA and registers to
* %rsp relative offsets. */
# define DW_REGNO_rax 0
# define DW_REGNO_rdx 1
# define DW_REGNO_rcx 2
# define DW_REGNO_rbx 3
# define DW_REGNO_rsi 4
# define DW_REGNO_rdi 5
# define DW_REGNO_rbp 6
# define DW_REGNO_rsp 7
# define DW_REGNO_r8 8
# define DW_REGNO_r9 9
# define DW_REGNO_r10 10
# define DW_REGNO_r11 11
# define DW_REGNO_r12 12
# define DW_REGNO_r13 13
# define DW_REGNO_r14 14
# define DW_REGNO_r15 15
# define DW_REGNO(reg) DW_REGNO_ ## reg
/* Fixed length encoding used for integers for now. */
# define DW_SLEB128_7BIT(value) \
0x00|((value) & 0x7f)
# define DW_SLEB128_28BIT(value) \
0x80|((value)&0x7f), \
0x80|(((value)>>7)&0x7f), \
0x80|(((value)>>14)&0x7f), \
0x00|(((value)>>21)&0x7f)
# define CFI_CFA_ON_STACK(rsp_offs,cfa_depth) \
.cfi_escape \
0x0f, /* DW_CFA_def_cfa_expression */ \
DW_SLEB128_7BIT(11), /* length */ \
0x77, /* DW_OP_breg7, rsp + constant */ \
DW_SLEB128_28BIT(rsp_offs), \
0x06, /* DW_OP_deref */ \
0x23, /* DW_OP_plus_constu */ \
DW_SLEB128_28BIT((cfa_depth)+8)
# define CFI_REG_ON_STACK(reg,rsp_offs) \
.cfi_escape \
0x10, /* DW_CFA_expression */ \
DW_SLEB128_7BIT(DW_REGNO(reg)), \
DW_SLEB128_7BIT(5), /* length */ \
0x77, /* DW_OP_breg7, rsp + constant */ \
DW_SLEB128_28BIT(rsp_offs)
#else
# define CFI_STARTPROC()
# define CFI_ENDPROC()
# define CFI_REMEMBER_STATE()
# define CFI_RESTORE_STATE()
# define CFI_ADJUST_CFA_OFFSET(off)
# define CFI_REL_OFFSET(reg,off)
# define CFI_DEF_CFA_REGISTER(reg)
# define CFI_REGISTER(ro,rn)
# define CFI_RESTORE(reg)
# define CFI_PUSH(reg)
# define CFI_POP(reg)
# define CFI_POP_TMP_REG()
# define CFI_LEAVE()
# define CFI_CFA_ON_STACK(rsp_offs,cfa_depth)
# define CFI_REG_ON_STACK(reg,rsp_offs)
#endif
#ifdef HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS
# define ENTER_SYSV_FUNC_PARAMS_0_4 \
pushq %rdi; \
CFI_PUSH(%rdi); \
pushq %rsi; \
CFI_PUSH(%rsi); \
movq %rcx, %rdi; \
movq %rdx, %rsi; \
movq %r8, %rdx; \
movq %r9, %rcx; \
# define ENTER_SYSV_FUNC_PARAMS_5 \
ENTER_SYSV_FUNC_PARAMS_0_4; \
movq 0x38(%rsp), %r8;
# define ENTER_SYSV_FUNC_PARAMS_6 \
ENTER_SYSV_FUNC_PARAMS_5; \
movq 0x40(%rsp), %r9;
# define EXIT_SYSV_FUNC \
popq %rsi; \
CFI_POP(%rsi); \
popq %rdi; \
CFI_POP(%rdi);
#else
# define ENTER_SYSV_FUNC_PARAMS_0_4
# define ENTER_SYSV_FUNC_PARAMS_5
# define ENTER_SYSV_FUNC_PARAMS_6
# define EXIT_SYSV_FUNC
#endif
/* 'ret' instruction replacement for straight-line speculation mitigation. */
#define ret_spec_stop \
ret; int3;
/* This prevents speculative execution on old AVX512 CPUs, to prevent
* speculative execution to AVX512 code. The vpopcntb instruction is
* available on newer CPUs that do not suffer from significant frequency
* drop when 512-bit vectors are utilized. */
#define spec_stop_avx512 \
vpxord %ymm16, %ymm16, %ymm16; \
vpopcntb %xmm16, %xmm16; /* Supported only by newer AVX512 CPUs. */ \
vpxord %ymm16, %ymm16, %ymm16;
#define spec_stop_avx512_intel_syntax \
vpxord ymm16, ymm16, ymm16; \
vpopcntb xmm16, xmm16; /* Supported only by newer AVX512 CPUs. */ \
vpxord ymm16, ymm16, ymm16;
#endif /* GCRY_ASM_COMMON_AMD64_H */
|
