1 // target-reloc.h -- target specific relocation support -*- C++ -*-
3 #ifndef GOLD_TARGET_RELOC_H
4 #define GOLD_TARGET_RELOC_H
9 #include "reloc-types.h"
14 // This function implements the generic part of reloc scanning. This
15 // is an inline function which takes a class whose operator()
16 // implements the machine specific part of scanning. We do it this
17 // way to avoidmaking a function call for each relocation, and to
18 // avoid repeating the generic code for each target.
20 template<int size
, bool big_endian
, typename Target_type
, int sh_type
,
24 const General_options
& options
,
28 Sized_relobj
<size
, big_endian
>* object
,
29 unsigned int data_shndx
,
30 const unsigned char* prelocs
,
33 const unsigned char* plocal_syms
,
36 typedef typename Reloc_types
<sh_type
, size
, big_endian
>::Reloc Reltype
;
37 const int reloc_size
= Reloc_types
<sh_type
, size
, big_endian
>::reloc_size
;
38 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
41 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
43 Reltype
reloc(prelocs
);
45 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
46 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
47 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
49 if (r_sym
< local_count
)
51 gold_assert(plocal_syms
!= NULL
);
52 typename
elfcpp::Sym
<size
, big_endian
> lsym(plocal_syms
54 const unsigned int shndx
= lsym
.get_st_shndx();
55 if (shndx
< elfcpp::SHN_LORESERVE
56 && shndx
!= elfcpp::SHN_UNDEF
57 && !object
->is_section_included(lsym
.get_st_shndx()))
59 // RELOC is a relocation against a local symbol in a
60 // section we are discarding. We can ignore this
61 // relocation. It will eventually become a reloc
62 // against the value zero.
64 // FIXME: We should issue a warning if this is an
65 // allocated section; is this the best place to do it?
67 // FIXME: The old GNU linker would in some cases look
68 // for the linkonce section which caused this section to
69 // be discarded, and, if the other section was the same
70 // size, change the reloc to refer to the other section.
71 // That seems risky and weird to me, and I don't know of
72 // any case where it is actually required.
77 scan
.local(options
, symtab
, layout
, target
, object
, data_shndx
,
82 Symbol
* gsym
= global_syms
[r_sym
- local_count
];
83 gold_assert(gsym
!= NULL
);
84 if (gsym
->is_forwarder())
85 gsym
= symtab
->resolve_forwards(gsym
);
87 scan
.global(options
, symtab
, layout
, target
, object
, data_shndx
,
93 // This function implements the generic part of relocation processing.
94 // This is an inline function which take a class whose operator()
95 // implements the machine specific part of relocation. We do it this
96 // way to avoid making a function call for each relocation, and to
97 // avoid repeating the generic relocation handling code for each
100 // SIZE is the ELF size: 32 or 64. BIG_ENDIAN is the endianness of
101 // the data. SH_TYPE is the section type: SHT_REL or SHT_RELA.
102 // RELOCATE implements operator() to do a relocation.
104 // PRELOCS points to the relocation data. RELOC_COUNT is the number
105 // of relocs. VIEW is the section data, VIEW_ADDRESS is its memory
106 // address, and VIEW_SIZE is the size.
108 template<int size
, bool big_endian
, typename Target_type
, int sh_type
,
112 const Relocate_info
<size
, big_endian
>* relinfo
,
114 const unsigned char* prelocs
,
117 typename
elfcpp::Elf_types
<size
>::Elf_Addr view_address
,
120 typedef typename Reloc_types
<sh_type
, size
, big_endian
>::Reloc Reltype
;
121 const int reloc_size
= Reloc_types
<sh_type
, size
, big_endian
>::reloc_size
;
124 unsigned int local_count
= relinfo
->local_symbol_count
;
125 const typename Sized_relobj
<size
, big_endian
>::Local_values
* local_values
=
126 relinfo
->local_values
;
127 const Symbol
* const * global_syms
= relinfo
->symbols
;
129 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
131 Reltype
reloc(prelocs
);
133 off_t offset
= reloc
.get_r_offset();
135 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
136 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
137 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
139 const Sized_symbol
<size
>* sym
;
140 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
142 if (r_sym
< local_count
)
145 value
= (*local_values
)[r_sym
];
149 const Symbol
* gsym
= global_syms
[r_sym
- local_count
];
150 gold_assert(gsym
!= NULL
);
151 if (gsym
->is_forwarder())
152 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
154 sym
= static_cast<const Sized_symbol
<size
>*>(gsym
);
155 value
= sym
->value();
158 if (!relocate
.relocate(relinfo
, target
, i
, reloc
, r_type
, sym
, value
,
159 view
+ offset
, view_address
+ offset
, view_size
))
162 if (offset
< 0 || offset
>= view_size
)
164 fprintf(stderr
, _("%s: %s: reloc has bad offset %zu\n"),
165 program_name
, relinfo
->location(i
, offset
).c_str(),
166 static_cast<size_t>(offset
));
171 && sym
->is_undefined()
172 && sym
->binding() != elfcpp::STB_WEAK
)
174 fprintf(stderr
, _("%s: %s: undefined reference to '%s'\n"),
175 program_name
, relinfo
->location(i
, offset
).c_str(),
180 if (sym
!= NULL
&& sym
->has_warning())
181 relinfo
->symtab
->issue_warning(sym
, relinfo
->location(i
, offset
));
185 } // End namespace gold.
187 #endif // !defined(GOLD_TARGET_RELOC_H)
This page took 0.03397 seconds and 4 git commands to generate.