/* Object file "section" support for the BFD library.
- Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011,
- 2012
- Free Software Foundation, Inc.
+ Copyright (C) 1990-2016 Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
. const char *name;
.
. {* A unique sequence number. *}
-. int id;
+. unsigned int id;
.
. {* Which section in the bfd; 0..n-1 as sections are created in a bfd. *}
-. int index;
+. unsigned int index;
.
. {* The next section in the list belonging to the BFD, or NULL. *}
. struct bfd_section *next;
. executables or shared objects. This is for COFF only. *}
.#define SEC_COFF_SHARED 0x8000000
.
+. {* This section should be compressed. This is for ELF linker
+. internal use only. *}
+.#define SEC_ELF_COMPRESS 0x8000000
+.
. {* When a section with this flag is being linked, then if the size of
. the input section is less than a page, it should not cross a page
. boundary. If the size of the input section is one page or more,
. TMS320C54X only. *}
.#define SEC_TIC54X_BLOCK 0x10000000
.
+. {* This section should be renamed. This is for ELF linker
+. internal use only. *}
+.#define SEC_ELF_RENAME 0x10000000
+.
. {* Conditionally link this section; do not link if there are no
. references found to any symbol in the section. This is for TI
. TMS320C54X only. *}
.#define SEC_TIC54X_CLINK 0x20000000
.
+. {* This section contains vliw code. This is for Toshiba MeP only. *}
+.#define SEC_MEP_VLIW 0x20000000
+.
. {* Indicate that section has the no read flag set. This happens
. when memory read flag isn't set. *}
.#define SEC_COFF_NOREAD 0x40000000
.
+. {* Indicate that section has the purecode flag set. *}
+.#define SEC_ELF_PURECODE 0x80000000
+.
. {* End of section flags. *}
.
. {* Some internal packed boolean fields. *}
.#define SEC_INFO_TYPE_MERGE 2
.#define SEC_INFO_TYPE_EH_FRAME 3
.#define SEC_INFO_TYPE_JUST_SYMS 4
+.#define SEC_INFO_TYPE_TARGET 5
+.#define SEC_INFO_TYPE_EH_FRAME_ENTRY 6
.
. {* Nonzero if this section uses RELA relocations, rather than REL. *}
. unsigned int use_rela_p:1;
. information. *}
. bfd_vma lma;
.
-. {* The size of the section in octets, as it will be output.
+. {* The size of the section in *octets*, as it will be output.
. Contains a value even if the section has no contents (e.g., the
. size of <<.bss>>). *}
. bfd_size_type size;
. {* The BFD which owns the section. *}
. bfd *owner;
.
-. {* INPUT_SECTION_FLAGS if specified in the linker script. *}
-. struct flag_info *section_flag_info;
-.
. {* A symbol which points at this section only. *}
. struct bfd_symbol *symbol;
. struct bfd_symbol **symbol_ptr_ptr;
.} asection;
.
.{* Relax table contains information about instructions which can
-. be removed by relaxation -- replacing a long address with a
+. be removed by relaxation -- replacing a long address with a
. short address. *}
.struct relax_table {
. {* Address where bytes may be deleted. *}
. bfd_vma addr;
-.
+.
. {* Number of bytes to be deleted. *}
. int size;
.};
.
+.{* Note: the following are provided as inline functions rather than macros
+. because not all callers use the return value. A macro implementation
+. would use a comma expression, eg: "((ptr)->foo = val, TRUE)" and some
+. compilers will complain about comma expressions that have no effect. *}
+.static inline bfd_boolean
+.bfd_set_section_userdata (bfd * abfd ATTRIBUTE_UNUSED, asection * ptr, void * val)
+.{
+. ptr->userdata = val;
+. return TRUE;
+.}
+.
+.static inline bfd_boolean
+.bfd_set_section_vma (bfd * abfd ATTRIBUTE_UNUSED, asection * ptr, bfd_vma val)
+.{
+. ptr->vma = ptr->lma = val;
+. ptr->user_set_vma = TRUE;
+. return TRUE;
+.}
+.
+.static inline bfd_boolean
+.bfd_set_section_alignment (bfd * abfd ATTRIBUTE_UNUSED, asection * ptr, unsigned int val)
+.{
+. ptr->alignment_power = val;
+. return TRUE;
+.}
+.
.{* These sections are global, and are managed by BFD. The application
. and target back end are not permitted to change the values in
-. these sections. New code should use the section_ptr macros rather
-. than referring directly to the const sections. The const sections
-. may eventually vanish. *}
+. these sections. *}
+.extern asection _bfd_std_section[4];
+.
.#define BFD_ABS_SECTION_NAME "*ABS*"
.#define BFD_UND_SECTION_NAME "*UND*"
.#define BFD_COM_SECTION_NAME "*COM*"
.#define BFD_IND_SECTION_NAME "*IND*"
.
-.{* The absolute section. *}
-.extern asection bfd_abs_section;
-.#define bfd_abs_section_ptr ((asection *) &bfd_abs_section)
-.#define bfd_is_abs_section(sec) ((sec) == bfd_abs_section_ptr)
-.{* Pointer to the undefined section. *}
-.extern asection bfd_und_section;
-.#define bfd_und_section_ptr ((asection *) &bfd_und_section)
-.#define bfd_is_und_section(sec) ((sec) == bfd_und_section_ptr)
.{* Pointer to the common section. *}
-.extern asection bfd_com_section;
-.#define bfd_com_section_ptr ((asection *) &bfd_com_section)
+.#define bfd_com_section_ptr (&_bfd_std_section[0])
+.{* Pointer to the undefined section. *}
+.#define bfd_und_section_ptr (&_bfd_std_section[1])
+.{* Pointer to the absolute section. *}
+.#define bfd_abs_section_ptr (&_bfd_std_section[2])
.{* Pointer to the indirect section. *}
-.extern asection bfd_ind_section;
-.#define bfd_ind_section_ptr ((asection *) &bfd_ind_section)
+.#define bfd_ind_section_ptr (&_bfd_std_section[3])
+.
+.#define bfd_is_und_section(sec) ((sec) == bfd_und_section_ptr)
+.#define bfd_is_abs_section(sec) ((sec) == bfd_abs_section_ptr)
.#define bfd_is_ind_section(sec) ((sec) == bfd_ind_section_ptr)
.
.#define bfd_is_const_section(SEC) \
. {* vma, lma, size, rawsize, compressed_size, relax, relax_count, *} \
. 0, 0, 0, 0, 0, 0, 0, \
. \
-. {* output_offset, output_section, alignment_power, *} \
-. 0, (struct bfd_section *) &SEC, 0, \
+. {* output_offset, output_section, alignment_power, *} \
+. 0, &SEC, 0, \
. \
. {* relocation, orelocation, reloc_count, filepos, rel_filepos, *} \
. NULL, NULL, 0, 0, 0, \
. {* target_index, used_by_bfd, constructor_chain, owner, *} \
. 0, NULL, NULL, NULL, \
. \
-. {* flag_info, *} \
-. NULL, \
-. \
. {* symbol, symbol_ptr_ptr, *} \
. (struct bfd_symbol *) SYM, &SEC.symbol, \
. \
/* the_bfd, name, value, attr, section [, udata] */
#ifdef __STDC__
#define GLOBAL_SYM_INIT(NAME, SECTION) \
- { 0, NAME, 0, BSF_SECTION_SYM, (asection *) SECTION, { 0 }}
+ { 0, NAME, 0, BSF_SECTION_SYM, SECTION, { 0 }}
#else
#define GLOBAL_SYM_INIT(NAME, SECTION) \
- { 0, NAME, 0, BSF_SECTION_SYM, (asection *) SECTION }
+ { 0, NAME, 0, BSF_SECTION_SYM, SECTION }
#endif
/* These symbols are global, not specific to any BFD. Therefore, anything
static const asymbol global_syms[] =
{
- GLOBAL_SYM_INIT (BFD_COM_SECTION_NAME, &bfd_com_section),
- GLOBAL_SYM_INIT (BFD_UND_SECTION_NAME, &bfd_und_section),
- GLOBAL_SYM_INIT (BFD_ABS_SECTION_NAME, &bfd_abs_section),
- GLOBAL_SYM_INIT (BFD_IND_SECTION_NAME, &bfd_ind_section)
+ GLOBAL_SYM_INIT (BFD_COM_SECTION_NAME, bfd_com_section_ptr),
+ GLOBAL_SYM_INIT (BFD_UND_SECTION_NAME, bfd_und_section_ptr),
+ GLOBAL_SYM_INIT (BFD_ABS_SECTION_NAME, bfd_abs_section_ptr),
+ GLOBAL_SYM_INIT (BFD_IND_SECTION_NAME, bfd_ind_section_ptr)
};
-#define STD_SECTION(SEC, FLAGS, NAME, IDX) \
- asection SEC = BFD_FAKE_SECTION(SEC, FLAGS, &global_syms[IDX], \
- NAME, IDX)
+#define STD_SECTION(NAME, IDX, FLAGS) \
+ BFD_FAKE_SECTION(_bfd_std_section[IDX], FLAGS, &global_syms[IDX], NAME, IDX)
-STD_SECTION (bfd_com_section, SEC_IS_COMMON, BFD_COM_SECTION_NAME, 0);
-STD_SECTION (bfd_und_section, 0, BFD_UND_SECTION_NAME, 1);
-STD_SECTION (bfd_abs_section, 0, BFD_ABS_SECTION_NAME, 2);
-STD_SECTION (bfd_ind_section, 0, BFD_IND_SECTION_NAME, 3);
+asection _bfd_std_section[] = {
+ STD_SECTION (BFD_COM_SECTION_NAME, 0, SEC_IS_COMMON),
+ STD_SECTION (BFD_UND_SECTION_NAME, 1, 0),
+ STD_SECTION (BFD_ABS_SECTION_NAME, 2, 0),
+ STD_SECTION (BFD_IND_SECTION_NAME, 3, 0)
+};
#undef STD_SECTION
/* Initialize an entry in the section hash table. */
return TRUE;
}
+static unsigned int section_id = 0x10; /* id 0 to 3 used by STD_SECTION. */
+
/* Initializes a new section. NEWSECT->NAME is already set. */
static asection *
bfd_section_init (bfd *abfd, asection *newsect)
{
- static int section_id = 0x10; /* id 0 to 3 used by STD_SECTION. */
-
newsect->id = section_id;
newsect->index = abfd->section_count;
newsect->owner = abfd;
abfd->section_count = 0;
memset (abfd->section_htab.table, 0,
abfd->section_htab.size * sizeof (struct bfd_hash_entry *));
+ abfd->section_htab.count = 0;
}
/*
asection *bfd_get_section_by_name (bfd *abfd, const char *name);
DESCRIPTION
- Run through @var{abfd} and return the one of the
- <<asection>>s whose name matches @var{name}, otherwise <<NULL>>.
- @xref{Sections}, for more information.
-
- This should only be used in special cases; the normal way to process
- all sections of a given name is to use <<bfd_map_over_sections>> and
- <<strcmp>> on the name (or better yet, base it on the section flags
- or something else) for each section.
+ Return the most recently created section attached to @var{abfd}
+ named @var{name}. Return NULL if no such section exists.
*/
asection *
return NULL;
}
+/*
+FUNCTION
+ bfd_get_next_section_by_name
+
+SYNOPSIS
+ asection *bfd_get_next_section_by_name (bfd *ibfd, asection *sec);
+
+DESCRIPTION
+ Given @var{sec} is a section returned by @code{bfd_get_section_by_name},
+ return the next most recently created section attached to the same
+ BFD with the same name, or if no such section exists in the same BFD and
+ IBFD is non-NULL, the next section with the same name in any input
+ BFD following IBFD. Return NULL on finding no section.
+*/
+
+asection *
+bfd_get_next_section_by_name (bfd *ibfd, asection *sec)
+{
+ struct section_hash_entry *sh;
+ const char *name;
+ unsigned long hash;
+
+ sh = ((struct section_hash_entry *)
+ ((char *) sec - offsetof (struct section_hash_entry, section)));
+
+ hash = sh->root.hash;
+ name = sec->name;
+ for (sh = (struct section_hash_entry *) sh->root.next;
+ sh != NULL;
+ sh = (struct section_hash_entry *) sh->root.next)
+ if (sh->root.hash == hash
+ && strcmp (sh->root.string, name) == 0)
+ return &sh->section;
+
+ if (ibfd != NULL)
+ {
+ while ((ibfd = ibfd->link.next) != NULL)
+ {
+ asection *s = bfd_get_section_by_name (ibfd, name);
+ if (s != NULL)
+ return s;
+ }
+ }
+
+ return NULL;
+}
+
+/*
+FUNCTION
+ bfd_get_linker_section
+
+SYNOPSIS
+ asection *bfd_get_linker_section (bfd *abfd, const char *name);
+
+DESCRIPTION
+ Return the linker created section attached to @var{abfd}
+ named @var{name}. Return NULL if no such section exists.
+*/
+
+asection *
+bfd_get_linker_section (bfd *abfd, const char *name)
+{
+ asection *sec = bfd_get_section_by_name (abfd, name);
+
+ while (sec != NULL && (sec->flags & SEC_LINKER_CREATED) == 0)
+ sec = bfd_get_next_section_by_name (NULL, sec);
+ return sec;
+}
+
/*
FUNCTION
bfd_get_section_by_name_if
return NULL;
hash = sh->root.hash;
- do
- {
- if ((*operation) (abfd, &sh->section, user_storage))
- return &sh->section;
- sh = (struct section_hash_entry *) sh->root.next;
- }
- while (sh != NULL && sh->root.hash == hash
- && strcmp (sh->root.string, name) == 0);
+ for (; sh != NULL; sh = (struct section_hash_entry *) sh->root.next)
+ if (sh->root.hash == hash
+ && strcmp (sh->root.string, name) == 0
+ && (*operation) (abfd, &sh->section, user_storage))
+ return &sh->section;
return NULL;
}
return bfd_make_section_with_flags (abfd, name, 0);
}
+/*
+FUNCTION
+ bfd_get_next_section_id
+
+SYNOPSIS
+ int bfd_get_next_section_id (void);
+
+DESCRIPTION
+ Returns the id that the next section created will have.
+*/
+
+int
+bfd_get_next_section_id (void)
+{
+ return section_id;
+}
+
/*
FUNCTION
bfd_set_section_flags
This is the preferred method for iterating over sections; an
alternative would be to use a loop:
-| section *p;
+| asection *p;
| for (p = abfd->sections; p != NULL; p = p->next)
| func (abfd, p, ...)
bfd_set_error (bfd_error_invalid_operation);
return FALSE;
}
-
- memcpy (location, section->contents + offset, (size_t) count);
+
+ memmove (location, section->contents + offset, (size_t) count);
return TRUE;
}
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