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
|
/* Assembler macros for i386.
Copyright (C) 1991-93,95,96,98,2002,2003,2005,2006,2011,2012
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdeps/generic/sysdep.h>
#ifdef __ASSEMBLER__
/* Syntactic details of assembler. */
/* ELF uses byte-counts for .align, most others use log2 of count of bytes. */
#define ALIGNARG(log2) 1<<log2
/* For ELF we need the `.type' directive to make shared libs work right. */
#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
#define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
/* In ELF C symbols are asm symbols. */
#undef NO_UNDERSCORES
#define NO_UNDERSCORES
/* Define an entry point visible from C.
There is currently a bug in gdb which prevents us from specifying
incomplete stabs information. Fake some entries here which specify
the current source file. */
#define ENTRY(name) \
STABS_CURRENT_FILE1("") \
STABS_CURRENT_FILE(name) \
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \
ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \
.align ALIGNARG(4); \
STABS_FUN(name) \
C_LABEL(name) \
cfi_startproc; \
CALL_MCOUNT
#undef END
#define END(name) \
cfi_endproc; \
ASM_SIZE_DIRECTIVE(name) \
STABS_FUN_END(name)
#define ENTRY_CHK(name) ENTRY (name)
#define END_CHK(name) END (name)
#ifdef HAVE_CPP_ASM_DEBUGINFO
/* Disable that goop, because we just pass -g through to the assembler
and it generates proper line number information directly. */
# define STABS_CURRENT_FILE1(name)
# define STABS_CURRENT_FILE(name)
# define STABS_FUN(name)
# define STABS_FUN_END(name)
#else
/* Remove the following two lines once the gdb bug is fixed. */
#define STABS_CURRENT_FILE(name) \
STABS_CURRENT_FILE1 (#name)
#define STABS_CURRENT_FILE1(name) \
1: .stabs name,100,0,0,1b;
/* Emit stabs definition lines. We use F(0,1) and define t(0,1) as `int',
the same way gcc does it. */
#define STABS_FUN(name) STABS_FUN2(name, name##:F(0,1))
#define STABS_FUN2(name, namestr) \
.stabs "int:t(0,1)=r(0,1);-2147483648;2147483647;",128,0,0,0; \
.stabs #namestr,36,0,0,name;
#define STABS_FUN_END(name) \
1: .stabs "",36,0,0,1b-name;
#endif
/* If compiled for profiling, call `mcount' at the start of each function. */
#ifdef PROF
/* The mcount code relies on a normal frame pointer being on the stack
to locate our caller, so push one just for its benefit. */
#define CALL_MCOUNT \
pushl %ebp; cfi_adjust_cfa_offset (4); movl %esp, %ebp; \
cfi_def_cfa_register (ebp); call JUMPTARGET(mcount); \
popl %ebp; cfi_def_cfa (esp, 4);
#else
#define CALL_MCOUNT /* Do nothing. */
#endif
#ifdef NO_UNDERSCORES
/* Since C identifiers are not normally prefixed with an underscore
on this system, the asm identifier `syscall_error' intrudes on the
C name space. Make sure we use an innocuous name. */
#define syscall_error __syscall_error
#define mcount _mcount
#endif
#define PSEUDO(name, syscall_name, args) \
.globl syscall_error; \
lose: SYSCALL_PIC_SETUP \
jmp JUMPTARGET(syscall_error); \
ENTRY (name) \
DO_CALL (syscall_name, args); \
jb lose
#undef PSEUDO_END
#define PSEUDO_END(name) \
END (name)
#undef JUMPTARGET
#ifdef PIC
#define JUMPTARGET(name) name##@PLT
#define SYSCALL_PIC_SETUP \
pushl %ebx; \
cfi_adjust_cfa_offset (4); \
call 0f; \
0: popl %ebx; \
cfi_adjust_cfa_offset (-4); \
addl $_GLOBAL_OFFSET_TABLE+[.-0b], %ebx;
# define SETUP_PIC_REG(reg) \
.ifndef __i686.get_pc_thunk.reg; \
.section .gnu.linkonce.t.__i686.get_pc_thunk.reg,"ax",@progbits; \
.globl __i686.get_pc_thunk.reg; \
.hidden __i686.get_pc_thunk.reg; \
.type __i686.get_pc_thunk.reg,@function; \
__i686.get_pc_thunk.reg: \
movl (%esp), %e##reg; \
ret; \
.size __i686.get_pc_thunk.reg, . - __i686.get_pc_thunk.reg; \
.previous; \
.endif; \
call __i686.get_pc_thunk.reg
# define LOAD_PIC_REG(reg) \
SETUP_PIC_REG(reg); addl $_GLOBAL_OFFSET_TABLE_, %e##reg
#else
#define JUMPTARGET(name) name
#define SYSCALL_PIC_SETUP /* Nothing. */
#endif
/* Local label name for asm code. */
#ifndef L
#define L(name) .L##name
#endif
#define atom_text_section .section ".text.atom", "ax"
#endif /* __ASSEMBLER__ */
|
