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
|
/* Assembler macros for ARM.
Copyright (C) 1997, 1998, 2003 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>
#if (!defined (__ARM_ARCH_2__) && !defined (__ARM_ARCH_3__) \
&& !defined (__ARM_ARCH_3M__) && !defined (__ARM_ARCH_4__))
# define __USE_BX__
#endif
#ifdef __ASSEMBLER__
/* Syntactic details of assembler. */
#ifdef HAVE_ELF
#define ALIGNARG(log2) 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 PLTJMP(_x) _x##(PLT)
#else
#define ALIGNARG(log2) log2
#define ASM_TYPE_DIRECTIVE(name,type) /* Nothing is specified. */
#define ASM_SIZE_DIRECTIVE(name) /* Nothing is specified. */
#define PLTJMP(_x) _x
#endif
/* APCS-32 doesn't preserve the condition codes across function call. */
#ifdef __APCS_32__
#define LOADREGS(cond, base, reglist...)\
ldm##cond base,reglist
#ifdef __USE_BX__
#define RETINSTR(cond, reg) \
bx##cond reg
#define DO_RET(_reg) \
bx _reg
#else
#define RETINSTR(cond, reg) \
mov##cond pc, reg
#define DO_RET(_reg) \
mov pc, _reg
#endif
#else /* APCS-26 */
#define LOADREGS(cond, base, reglist...)\
ldm##cond base,reglist^
#define RETINSTR(cond, reg) \
mov##cond##s pc, reg
#define DO_RET(_reg) \
movs pc, _reg
#endif
/* Define an entry point visible from C. */
#define ENTRY(name) \
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \
ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),function) \
.align ALIGNARG(4); \
C_LABEL(name) \
CALL_MCOUNT
#undef END
#define END(name) \
ASM_SIZE_DIRECTIVE(name)
/* If compiled for profiling, call `mcount' at the start of each function. */
#ifdef PROF
#define CALL_MCOUNT \
str lr,[sp, #-4]! ; \
bl PLTJMP(mcount) ; \
ldr lr, [sp], #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
#endif /* __ASSEMBLER__ */
|
