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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
7b956f03 AL |
2 | #ifndef _ASM_X86_DWARF2_H |
3 | #define _ASM_X86_DWARF2_H | |
4 | ||
5 | #ifndef __ASSEMBLY__ | |
6 | #warning "asm/dwarf2.h should be only included in pure assembly files" | |
7 | #endif | |
8 | ||
9 | /* | |
10 | * Macros for dwarf2 CFI unwind table entries. | |
11 | * See "as.info" for details on these pseudo ops. Unfortunately | |
12 | * they are only supported in very new binutils, so define them | |
13 | * away for older version. | |
14 | */ | |
15 | ||
16 | #ifdef CONFIG_AS_CFI | |
17 | ||
18 | #define CFI_STARTPROC .cfi_startproc | |
19 | #define CFI_ENDPROC .cfi_endproc | |
20 | #define CFI_DEF_CFA .cfi_def_cfa | |
21 | #define CFI_DEF_CFA_REGISTER .cfi_def_cfa_register | |
22 | #define CFI_DEF_CFA_OFFSET .cfi_def_cfa_offset | |
23 | #define CFI_ADJUST_CFA_OFFSET .cfi_adjust_cfa_offset | |
24 | #define CFI_OFFSET .cfi_offset | |
25 | #define CFI_REL_OFFSET .cfi_rel_offset | |
26 | #define CFI_REGISTER .cfi_register | |
27 | #define CFI_RESTORE .cfi_restore | |
28 | #define CFI_REMEMBER_STATE .cfi_remember_state | |
29 | #define CFI_RESTORE_STATE .cfi_restore_state | |
30 | #define CFI_UNDEFINED .cfi_undefined | |
31 | #define CFI_ESCAPE .cfi_escape | |
32 | ||
33 | #ifdef CONFIG_AS_CFI_SIGNAL_FRAME | |
34 | #define CFI_SIGNAL_FRAME .cfi_signal_frame | |
35 | #else | |
36 | #define CFI_SIGNAL_FRAME | |
37 | #endif | |
38 | ||
39 | #if defined(CONFIG_AS_CFI_SECTIONS) && defined(__ASSEMBLY__) | |
f24f9108 | 40 | #ifndef BUILD_VDSO |
7b956f03 AL |
41 | /* |
42 | * Emit CFI data in .debug_frame sections, not .eh_frame sections. | |
43 | * The latter we currently just discard since we don't do DWARF | |
44 | * unwinding at runtime. So only the offline DWARF information is | |
f24f9108 AL |
45 | * useful to anyone. Note we should not use this directive if |
46 | * vmlinux.lds.S gets changed so it doesn't discard .eh_frame. | |
7b956f03 AL |
47 | */ |
48 | .cfi_sections .debug_frame | |
f24f9108 AL |
49 | #else |
50 | /* | |
51 | * For the vDSO, emit both runtime unwind information and debug | |
52 | * symbols for the .dbg file. | |
53 | */ | |
54 | .cfi_sections .eh_frame, .debug_frame | |
55 | #endif | |
7b956f03 AL |
56 | #endif |
57 | ||
58 | #else | |
59 | ||
60 | /* | |
61 | * Due to the structure of pre-exisiting code, don't use assembler line | |
62 | * comment character # to ignore the arguments. Instead, use a dummy macro. | |
63 | */ | |
64 | .macro cfi_ignore a=0, b=0, c=0, d=0 | |
65 | .endm | |
66 | ||
67 | #define CFI_STARTPROC cfi_ignore | |
68 | #define CFI_ENDPROC cfi_ignore | |
69 | #define CFI_DEF_CFA cfi_ignore | |
70 | #define CFI_DEF_CFA_REGISTER cfi_ignore | |
71 | #define CFI_DEF_CFA_OFFSET cfi_ignore | |
72 | #define CFI_ADJUST_CFA_OFFSET cfi_ignore | |
73 | #define CFI_OFFSET cfi_ignore | |
74 | #define CFI_REL_OFFSET cfi_ignore | |
75 | #define CFI_REGISTER cfi_ignore | |
76 | #define CFI_RESTORE cfi_ignore | |
77 | #define CFI_REMEMBER_STATE cfi_ignore | |
78 | #define CFI_RESTORE_STATE cfi_ignore | |
79 | #define CFI_UNDEFINED cfi_ignore | |
80 | #define CFI_ESCAPE cfi_ignore | |
81 | #define CFI_SIGNAL_FRAME cfi_ignore | |
82 | ||
83 | #endif | |
84 | ||
7b956f03 | 85 | #endif /* _ASM_X86_DWARF2_H */ |