Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ASM_EXTABLE_H
3#define __ASM_EXTABLE_H
4
5#include <linux/stringify.h>
6#include <linux/bits.h>
7#include <asm/asm-const.h>
8
9#define EX_TYPE_NONE 0
10#define EX_TYPE_FIXUP 1
11#define EX_TYPE_BPF 2
12#define EX_TYPE_UA_STORE 3
13#define EX_TYPE_UA_LOAD_MEM 4
14#define EX_TYPE_UA_LOAD_REG 5
15#define EX_TYPE_UA_LOAD_REGPAIR 6
16
17#define EX_DATA_REG_ERR_SHIFT 0
18#define EX_DATA_REG_ERR GENMASK(3, 0)
19
20#define EX_DATA_REG_ADDR_SHIFT 4
21#define EX_DATA_REG_ADDR GENMASK(7, 4)
22
23#define EX_DATA_LEN_SHIFT 8
24#define EX_DATA_LEN GENMASK(11, 8)
25
26#define __EX_TABLE(_section, _fault, _target, _type) \
27 stringify_in_c(.section _section,"a";) \
28 stringify_in_c(.balign 4;) \
29 stringify_in_c(.long (_fault) - .;) \
30 stringify_in_c(.long (_target) - .;) \
31 stringify_in_c(.short (_type);) \
32 stringify_in_c(.short 0;) \
33 stringify_in_c(.previous)
34
35#define __EX_TABLE_UA(_section, _fault, _target, _type, _regerr, _regaddr, _len)\
36 stringify_in_c(.section _section,"a";) \
37 stringify_in_c(.balign 4;) \
38 stringify_in_c(.long (_fault) - .;) \
39 stringify_in_c(.long (_target) - .;) \
40 stringify_in_c(.short (_type);) \
41 stringify_in_c(.macro extable_reg regerr, regaddr;) \
42 stringify_in_c(.set .Lfound, 0;) \
43 stringify_in_c(.set .Lcurr, 0;) \
44 stringify_in_c(.irp rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;) \
45 stringify_in_c( .ifc "\regerr", "%%r\rs";) \
46 stringify_in_c( .set .Lfound, 1;) \
47 stringify_in_c( .set .Lregerr, .Lcurr;) \
48 stringify_in_c( .endif;) \
49 stringify_in_c( .set .Lcurr, .Lcurr+1;) \
50 stringify_in_c(.endr;) \
51 stringify_in_c(.ifne (.Lfound != 1);) \
52 stringify_in_c( .error "extable_reg: bad register argument1";) \
53 stringify_in_c(.endif;) \
54 stringify_in_c(.set .Lfound, 0;) \
55 stringify_in_c(.set .Lcurr, 0;) \
56 stringify_in_c(.irp rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;) \
57 stringify_in_c( .ifc "\regaddr", "%%r\rs";) \
58 stringify_in_c( .set .Lfound, 1;) \
59 stringify_in_c( .set .Lregaddr, .Lcurr;) \
60 stringify_in_c( .endif;) \
61 stringify_in_c( .set .Lcurr, .Lcurr+1;) \
62 stringify_in_c(.endr;) \
63 stringify_in_c(.ifne (.Lfound != 1);) \
64 stringify_in_c( .error "extable_reg: bad register argument2";) \
65 stringify_in_c(.endif;) \
66 stringify_in_c(.short .Lregerr << EX_DATA_REG_ERR_SHIFT | \
67 .Lregaddr << EX_DATA_REG_ADDR_SHIFT | \
68 _len << EX_DATA_LEN_SHIFT;) \
69 stringify_in_c(.endm;) \
70 stringify_in_c(extable_reg _regerr,_regaddr;) \
71 stringify_in_c(.purgem extable_reg;) \
72 stringify_in_c(.previous)
73
74#define EX_TABLE(_fault, _target) \
75 __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_FIXUP)
76
77#define EX_TABLE_AMODE31(_fault, _target) \
78 __EX_TABLE(.amode31.ex_table, _fault, _target, EX_TYPE_FIXUP)
79
80#define EX_TABLE_UA_STORE(_fault, _target, _regerr) \
81 __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_STORE, _regerr, _regerr, 0)
82
83#define EX_TABLE_UA_LOAD_MEM(_fault, _target, _regerr, _regmem, _len) \
84 __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_MEM, _regerr, _regmem, _len)
85
86#define EX_TABLE_UA_LOAD_REG(_fault, _target, _regerr, _regzero) \
87 __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REG, _regerr, _regzero, 0)
88
89#define EX_TABLE_UA_LOAD_REGPAIR(_fault, _target, _regerr, _regzero) \
90 __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REGPAIR, _regerr, _regzero, 0)
91
92#endif /* __ASM_EXTABLE_H */