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18652864 SG |
1 | /* |
2 | * Copyright (c) 2011 The Chromium OS Authors. | |
3 | * | |
1a459660 | 4 | * SPDX-License-Identifier: GPL-2.0+ |
18652864 SG |
5 | */ |
6 | ||
7 | /* Taken from Linux kernel, commit f56c3196 */ | |
8 | ||
9 | #ifndef _ASM_GENERIC_SECTIONS_H_ | |
10 | #define _ASM_GENERIC_SECTIONS_H_ | |
11 | ||
12 | /* References to section boundaries */ | |
13 | ||
14 | extern char _text[], _stext[], _etext[]; | |
15 | extern char _data[], _sdata[], _edata[]; | |
16 | extern char __bss_start[], __bss_stop[]; | |
17 | extern char __init_begin[], __init_end[]; | |
18 | extern char _sinittext[], _einittext[]; | |
a733b06b | 19 | extern char _end[], _init[]; |
18652864 SG |
20 | extern char __per_cpu_load[], __per_cpu_start[], __per_cpu_end[]; |
21 | extern char __kprobes_text_start[], __kprobes_text_end[]; | |
22 | extern char __entry_text_start[], __entry_text_end[]; | |
23 | extern char __initdata_begin[], __initdata_end[]; | |
24 | extern char __start_rodata[], __end_rodata[]; | |
25 | ||
26 | /* Start and end of .ctors section - used for constructor calls. */ | |
27 | extern char __ctors_start[], __ctors_end[]; | |
28 | ||
29 | /* function descriptor handling (if any). Override | |
30 | * in asm/sections.h */ | |
31 | #ifndef dereference_function_descriptor | |
32 | #define dereference_function_descriptor(p) (p) | |
33 | #endif | |
34 | ||
35 | /* random extra sections (if any). Override | |
36 | * in asm/sections.h */ | |
37 | #ifndef arch_is_kernel_text | |
38 | static inline int arch_is_kernel_text(unsigned long addr) | |
39 | { | |
40 | return 0; | |
41 | } | |
42 | #endif | |
43 | ||
44 | #ifndef arch_is_kernel_data | |
45 | static inline int arch_is_kernel_data(unsigned long addr) | |
46 | { | |
47 | return 0; | |
48 | } | |
49 | #endif | |
50 | ||
51 | /* U-Boot-specific things begin here */ | |
52 | ||
53 | /* Start of U-Boot text region */ | |
54 | extern char __text_start[]; | |
55 | ||
56 | /* This marks the end of the text region which must be relocated */ | |
57 | extern char __image_copy_end[]; | |
58 | ||
59 | /* | |
60 | * This is the U-Boot entry point - prior to relocation it should be same | |
61 | * as __text_start | |
62 | */ | |
63 | extern void _start(void); | |
64 | ||
65 | /* | |
66 | * ARM needs to use offsets for symbols, since the values of some symbols | |
67 | * are not resolved prior to relocation (and are just 0). Maybe this can be | |
68 | * resolved, or maybe other architectures are similar, iwc this should be | |
69 | * promoted to an architecture option. | |
70 | */ | |
71 | #ifdef CONFIG_ARM | |
72 | #define CONFIG_SYS_SYM_OFFSETS | |
73 | #endif | |
74 | ||
75 | #ifdef CONFIG_SYS_SYM_OFFSETS | |
76 | /* Start/end of the relocation entries, as an offset from _start */ | |
77 | extern ulong _rel_dyn_start_ofs; | |
78 | extern ulong _rel_dyn_end_ofs; | |
79 | ||
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80 | /* End of the region to be relocated, as an offset form _start */ |
81 | extern ulong _image_copy_end_ofs; | |
82 | ||
83 | extern ulong _bss_start_ofs; /* BSS start relative to _start */ | |
84 | extern ulong _bss_end_ofs; /* BSS end relative to _start */ | |
85 | extern ulong _end_ofs; /* end of image relative to _start */ | |
86 | ||
87 | extern ulong _TEXT_BASE; /* code start */ | |
88 | ||
89 | #else /* don't use offsets: */ | |
90 | ||
91 | /* Exports from the Linker Script */ | |
92 | extern ulong __data_end; | |
93 | extern ulong __rel_dyn_start; | |
94 | extern ulong __rel_dyn_end; | |
95 | extern ulong __bss_end; | |
96 | ||
97 | extern ulong _TEXT_BASE; /* code start */ | |
98 | ||
99 | #endif | |
100 | ||
101 | #endif /* _ASM_GENERIC_SECTIONS_H_ */ |