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c9cf6dde | 1 | /* Assembler macros for x86-64. |
04277e02 | 2 | Copyright (C) 2001-2019 Free Software Foundation, Inc. |
c9cf6dde AJ |
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 | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
c9cf6dde | 18 | |
3b550e9e L |
19 | #ifndef _X86_64_SYSDEP_H |
20 | #define _X86_64_SYSDEP_H 1 | |
21 | ||
95b93c6e | 22 | #include <sysdeps/x86/sysdep.h> |
c9cf6dde AJ |
23 | |
24 | #ifdef __ASSEMBLER__ | |
25 | ||
26 | /* Syntactic details of assembler. */ | |
27 | ||
21933112 AS |
28 | /* This macro is for setting proper CFI with DW_CFA_expression describing |
29 | the register as saved relative to %rsp instead of relative to the CFA. | |
30 | Expression is DW_OP_drop, DW_OP_breg7 (%rsp is register 7), sleb128 offset | |
31 | from %rsp. */ | |
32 | #define cfi_offset_rel_rsp(regn, off) .cfi_escape 0x10, regn, 0x4, 0x13, \ | |
33 | 0x77, off & 0x7F | 0x80, off >> 7 | |
34 | ||
c9cf6dde AJ |
35 | /* If compiled for profiling, call `mcount' at the start of each function. */ |
36 | #ifdef PROF | |
c9cf6dde AJ |
37 | /* The mcount code relies on a normal frame pointer being on the stack |
38 | to locate our caller, so push one just for its benefit. */ | |
50189569 AJ |
39 | #define CALL_MCOUNT \ |
40 | pushq %rbp; \ | |
41 | cfi_adjust_cfa_offset(8); \ | |
42 | movq %rsp, %rbp; \ | |
43 | cfi_def_cfa_register(%rbp); \ | |
44 | call JUMPTARGET(mcount); \ | |
45 | popq %rbp; \ | |
46 | cfi_def_cfa(rsp,8); | |
c9cf6dde AJ |
47 | #else |
48 | #define CALL_MCOUNT /* Do nothing. */ | |
49 | #endif | |
50 | ||
c9cf6dde AJ |
51 | #define PSEUDO(name, syscall_name, args) \ |
52 | lose: \ | |
53 | jmp JUMPTARGET(syscall_error) \ | |
54 | .globl syscall_error; \ | |
55 | ENTRY (name) \ | |
56 | DO_CALL (syscall_name, args); \ | |
57 | jb lose | |
58 | ||
29d9a17d | 59 | #undef JUMPTARGET |
c9070e63 | 60 | #ifdef SHARED |
6901def6 L |
61 | # ifdef BIND_NOW |
62 | # define JUMPTARGET(name) *name##@GOTPCREL(%rip) | |
63 | # else | |
64 | # define JUMPTARGET(name) name##@PLT | |
65 | # endif | |
c9cf6dde | 66 | #else |
c9070e63 | 67 | /* For static archives, branch to target directly. */ |
6901def6 | 68 | # define JUMPTARGET(name) name |
c9cf6dde AJ |
69 | #endif |
70 | ||
520ae0fd L |
71 | /* Long and pointer size in bytes. */ |
72 | #define LP_SIZE 8 | |
73 | ||
74 | /* Instruction to operate on long and pointer. */ | |
75 | #define LP_OP(insn) insn##q | |
76 | ||
77 | /* Assembler address directive. */ | |
78 | #define ASM_ADDR .quad | |
79 | ||
80 | /* Registers to hold long and pointer. */ | |
81 | #define RAX_LP rax | |
82 | #define RBP_LP rbp | |
83 | #define RBX_LP rbx | |
84 | #define RCX_LP rcx | |
85 | #define RDI_LP rdi | |
86 | #define RDX_LP rdx | |
87 | #define RSI_LP rsi | |
88 | #define RSP_LP rsp | |
89 | #define R8_LP r8 | |
90 | #define R9_LP r9 | |
91 | #define R10_LP r10 | |
92 | #define R11_LP r11 | |
93 | #define R12_LP r12 | |
94 | #define R13_LP r13 | |
95 | #define R14_LP r14 | |
96 | #define R15_LP r15 | |
97 | ||
98 | #else /* __ASSEMBLER__ */ | |
99 | ||
100 | /* Long and pointer size in bytes. */ | |
101 | #define LP_SIZE "8" | |
102 | ||
103 | /* Instruction to operate on long and pointer. */ | |
104 | #define LP_OP(insn) #insn "q" | |
105 | ||
106 | /* Assembler address directive. */ | |
107 | #define ASM_ADDR ".quad" | |
108 | ||
109 | /* Registers to hold long and pointer. */ | |
110 | #define RAX_LP "rax" | |
111 | #define RBP_LP "rbp" | |
112 | #define RBX_LP "rbx" | |
113 | #define RCX_LP "rcx" | |
114 | #define RDI_LP "rdi" | |
115 | #define RDX_LP "rdx" | |
116 | #define RSI_LP "rsi" | |
117 | #define RSP_LP "rsp" | |
118 | #define R8_LP "r8" | |
119 | #define R9_LP "r9" | |
120 | #define R10_LP "r10" | |
121 | #define R11_LP "r11" | |
122 | #define R12_LP "r12" | |
123 | #define R13_LP "r13" | |
124 | #define R14_LP "r14" | |
125 | #define R15_LP "r15" | |
126 | ||
c9cf6dde | 127 | #endif /* __ASSEMBLER__ */ |
3b550e9e L |
128 | |
129 | #endif /* _X86_64_SYSDEP_H */ |