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
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_S390_NOSPEC_ASM_H
#define _ASM_S390_NOSPEC_ASM_H
#include <asm/dwarf.h>
#ifdef __ASSEMBLY__
#ifdef CC_USING_EXPOLINE
/*
* The expoline macros are used to create thunks in the same format
* as gcc generates them. The 'comdat' section flag makes sure that
* the various thunks are merged into a single copy.
*/
.macro __THUNK_PROLOG_NAME name
#ifdef CONFIG_EXPOLINE_EXTERN
.pushsection .text,"ax",@progbits
.align 16,0x07
#else
.pushsection .text.\name,"axG",@progbits,\name,comdat
#endif
.globl \name
.hidden \name
.type \name,@function
\name:
CFI_STARTPROC
.endm
.macro __THUNK_EPILOG_NAME name
CFI_ENDPROC
#ifdef CONFIG_EXPOLINE_EXTERN
.size \name, .-\name
#endif
.popsection
.endm
.macro __THUNK_PROLOG_BR r1
__THUNK_PROLOG_NAME __s390_indirect_jump_r\r1
.endm
.macro __THUNK_EPILOG_BR r1
__THUNK_EPILOG_NAME __s390_indirect_jump_r\r1
.endm
.macro __THUNK_BR r1
jg __s390_indirect_jump_r\r1
.endm
.macro __THUNK_BRASL r1,r2
brasl \r1,__s390_indirect_jump_r\r2
.endm
.macro __DECODE_R expand,reg
.set .L__decode_fail,1
.irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \reg,%r\r1
\expand \r1
.set .L__decode_fail,0
.endif
.endr
.if .L__decode_fail == 1
.error "__DECODE_R failed"
.endif
.endm
.macro __DECODE_RR expand,rsave,rtarget
.set .L__decode_fail,1
.irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \rsave,%r\r1
.irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \rtarget,%r\r2
\expand \r1,\r2
.set .L__decode_fail,0
.endif
.endr
.endif
.endr
.if .L__decode_fail == 1
.error "__DECODE_RR failed"
.endif
.endm
.macro __THUNK_EX_BR reg
exrl 0,555f
j .
555: br \reg
.endm
#ifdef CONFIG_EXPOLINE_EXTERN
.macro GEN_BR_THUNK reg
.endm
.macro GEN_BR_THUNK_EXTERN reg
#else
.macro GEN_BR_THUNK reg
#endif
__DECODE_R __THUNK_PROLOG_BR,\reg
__THUNK_EX_BR \reg
__DECODE_R __THUNK_EPILOG_BR,\reg
.endm
.macro BR_EX reg
557: __DECODE_R __THUNK_BR,\reg
.pushsection .s390_indirect_branches,"a",@progbits
.long 557b-.
.popsection
.endm
.macro BASR_EX rsave,rtarget
559: __DECODE_RR __THUNK_BRASL,\rsave,\rtarget
.pushsection .s390_indirect_branches,"a",@progbits
.long 559b-.
.popsection
.endm
#else
.macro GEN_BR_THUNK reg
.endm
.macro BR_EX reg
br \reg
.endm
.macro BASR_EX rsave,rtarget
basr \rsave,\rtarget
.endm
#endif /* CC_USING_EXPOLINE */
#endif /* __ASSEMBLY__ */
#endif /* _ASM_S390_NOSPEC_ASM_H */
|
