/* Object file "section" support for the BFD library.
- Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000
+ Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ 2000, 2001, 2002, 2003
Free Software Foundation, Inc.
Written by Cygnus Support.
| size 0x103 |
| output_section --------|
-
SUBSECTION
Link orders
*/
-
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
. specific code; it is not an index into the list returned by
. bfd_canonicalize_symtab. *}
. long symbol;
-.
-. {* If this section is being discarded, the linker uses this field
-. to point to the input section which is being kept. *}
-. struct sec *sec;
.};
.
-.typedef struct sec
+.typedef struct bfd_section
.{
. {* The name of the section; the name isn't a copy, the pointer is
. the same as that passed to bfd_make_section. *}
-.
. const char *name;
.
. {* A unique sequence number. *}
-.
. int id;
.
-. {* Which section is it; 0..nth. *}
-.
+. {* Which section in the bfd; 0..n-1 as sections are created in a bfd. *}
. int index;
.
. {* The next section in the list belonging to the BFD, or NULL. *}
-.
-. struct sec *next;
+. struct bfd_section *next;
.
. {* The field flags contains attributes of the section. Some
. flags are read in from the object file, and some are
. synthesized from other information. *}
-.
. flagword flags;
.
.#define SEC_NO_FLAGS 0x000
. some relocation information too. *}
.#define SEC_RELOC 0x004
.
-.#if 0 {* Obsolete ? *}
-.#define SEC_BALIGN 0x008
-.#endif
+. {* ELF reserves 4 processor specific bits and 8 operating system
+. specific bits in sh_flags; at present we can get away with just
+. one in communicating between the assembler and BFD, but this
+. isn't a good long-term solution. *}
+.#define SEC_ARCH_BIT_0 0x008
.
. {* A signal to the OS that the section contains read only data. *}
.#define SEC_READONLY 0x010
. standard data. *}
.#define SEC_CONSTRUCTOR 0x100
.
-. {* The section is a constructor, and should be placed at the
-. end of the text, data, or bss section(?). *}
-.#define SEC_CONSTRUCTOR_TEXT 0x1100
-.#define SEC_CONSTRUCTOR_DATA 0x2100
-.#define SEC_CONSTRUCTOR_BSS 0x3100
-.
. {* The section has contents - a data section could be
. <<SEC_ALLOC>> | <<SEC_HAS_CONTENTS>>; a debug section could be
. <<SEC_HAS_CONTENTS>> *}
. sections. *}
.#define SEC_COFF_SHARED_LIBRARY 0x800
.
+. {* The section contains thread local data. *}
+.#define SEC_THREAD_LOCAL 0x1000
+.
+. {* The section has GOT references. This flag is only for the
+. linker, and is currently only used by the elf32-hppa back end.
+. It will be set if global offset table references were detected
+. in this section, which indicate to the linker that the section
+. contains PIC code, and must be handled specially when doing a
+. static link. *}
+.#define SEC_HAS_GOT_REF 0x4000
+.
. {* The section contains common symbols (symbols may be defined
. multiple times, the value of a symbol is the amount of
. space it requires, and the largest symbol value is the one
. objects are to be further relocated. *}
.#define SEC_EXCLUDE 0x40000
.
-. {* The contents of this section are to be sorted by the
-. based on the address specified in the associated symbol
-. table. *}
+. {* The contents of this section are to be sorted based on the sum of
+. the symbol and addend values specified by the associated relocation
+. entries. Entries without associated relocation entries will be
+. appended to the end of the section in an unspecified order. *}
.#define SEC_SORT_ENTRIES 0x80000
.
. {* When linking, duplicate sections of the same name should be
. references found to any symbol in the section. *}
.#define SEC_CLINK 0x10000000
.
+. {* Attempt to merge identical entities in the section.
+. Entity size is given in the entsize field. *}
+.#define SEC_MERGE 0x20000000
+.
+. {* If given with SEC_MERGE, entities to merge are zero terminated
+. strings where entsize specifies character size instead of fixed
+. size entries. *}
+.#define SEC_STRINGS 0x40000000
+.
+. {* This section contains data about section groups. *}
+.#define SEC_GROUP 0x80000000
+.
. {* End of section flags. *}
.
. {* Some internal packed boolean fields. *}
. {* A mark flag used by some of the linker backends. *}
. unsigned int linker_mark : 1;
.
+. {* Another mark flag used by some of the linker backends. Set for
+. output sections that have an input section. *}
+. unsigned int linker_has_input : 1;
+.
. {* A mark flag used by some linker backends for garbage collection. *}
. unsigned int gc_mark : 1;
.
+. {* The following flags are used by the ELF linker. *}
+.
+. {* Mark sections which have been allocated to segments. *}
+. unsigned int segment_mark : 1;
+.
+. {* Type of sec_info information. *}
+. unsigned int sec_info_type:3;
+.#define ELF_INFO_TYPE_NONE 0
+.#define ELF_INFO_TYPE_STABS 1
+.#define ELF_INFO_TYPE_MERGE 2
+.#define ELF_INFO_TYPE_EH_FRAME 3
+.#define ELF_INFO_TYPE_JUST_SYMS 4
+.
+. {* Nonzero if this section uses RELA relocations, rather than REL. *}
+. unsigned int use_rela_p:1;
+.
+. {* Bits used by various backends. *}
+. unsigned int has_tls_reloc:1;
+.
+. {* Nonzero if this section needs the relax finalize pass. *}
+. unsigned int need_finalize_relax:1;
+.
+. {* Nonzero if this section has a gp reloc. *}
+. unsigned int has_gp_reloc:1;
+.
+. {* Unused bits. *}
+. unsigned int flag13:1;
+. unsigned int flag14:1;
+. unsigned int flag15:1;
+. unsigned int flag16:4;
+. unsigned int flag20:4;
+. unsigned int flag24:8;
+.
. {* End of internal packed boolean fields. *}
.
. {* The virtual memory address of the section - where it will be
. backend can assign addresses (for example, in <<a.out>>, where
. the default address for <<.data>> is dependent on the specific
. target and various flags). *}
-.
. bfd_vma vma;
.
. {* The load address of the section - where it would be in a
. rom image; really only used for writing section header
-. information. *}
-.
+. information. *}
. bfd_vma lma;
.
. {* 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>>). This will be filled in after relocation. *}
-.
. bfd_size_type _cooked_size;
.
. {* The original size on disk of the section, in octets. Normally this
. value is the same as the size, but if some relaxing has
. been done, then this value will be bigger. *}
-.
. bfd_size_type _raw_size;
.
. {* If this section is going to be output, then this value is the
. 100th octet (8-bit quantity) in the output section, this value
. would be 100. However, if the target byte size is 16 bits
. (bfd_octets_per_byte is "2"), this value would be 50. *}
-.
. bfd_vma output_offset;
.
. {* The output section through which to map on output. *}
-.
-. struct sec *output_section;
+. struct bfd_section *output_section;
.
. {* The alignment requirement of the section, as an exponent of 2 -
. e.g., 3 aligns to 2^3 (or 8). *}
-.
. unsigned int alignment_power;
.
. {* If an input section, a pointer to a vector of relocation
. records for the data in this section. *}
-.
. struct reloc_cache_entry *relocation;
.
. {* If an output section, a pointer to a vector of pointers to
. relocation records for the data in this section. *}
-.
. struct reloc_cache_entry **orelocation;
.
-. {* The number of relocation records in one of the above *}
-.
+. {* The number of relocation records in one of the above. *}
. unsigned reloc_count;
.
. {* Information below is back end specific - and not always used
. or updated. *}
.
. {* File position of section data. *}
-.
. file_ptr filepos;
.
. {* File position of relocation info. *}
-.
. file_ptr rel_filepos;
.
. {* File position of line data. *}
-.
. file_ptr line_filepos;
.
. {* Pointer to data for applications. *}
-.
-. PTR userdata;
+. void *userdata;
.
. {* If the SEC_IN_MEMORY flag is set, this points to the actual
. contents. *}
. unsigned char *contents;
.
. {* Attached line number information. *}
-.
. alent *lineno;
.
. {* Number of line number records. *}
-.
. unsigned int lineno_count;
.
-. {* Optional information about a COMDAT entry; NULL if not COMDAT. *}
+. {* Entity size for merging purposes. *}
+. unsigned int entsize;
.
+. {* Optional information about a COMDAT entry; NULL if not COMDAT. *}
. struct bfd_comdat_info *comdat;
.
+. {* Points to the kept section if this section is a link-once section,
+. and is discarded. *}
+. struct bfd_section *kept_section;
+.
. {* When a section is being output, this value changes as more
. linenumbers are written out. *}
-.
. file_ptr moving_line_filepos;
.
. {* What the section number is in the target world. *}
-.
. int target_index;
.
-. PTR used_by_bfd;
+. void *used_by_bfd;
.
. {* If this is a constructor section then here is a list of the
. relocations created to relocate items within it. *}
-.
. struct relent_chain *constructor_chain;
.
. {* The BFD which owns the section. *}
-.
. bfd *owner;
.
-. {* A symbol which points at this section only *}
-. struct symbol_cache_entry *symbol;
-. struct symbol_cache_entry **symbol_ptr_ptr;
+. {* A symbol which points at this section only. *}
+. struct bfd_symbol *symbol;
+. struct bfd_symbol **symbol_ptr_ptr;
.
. struct bfd_link_order *link_order_head;
. struct bfd_link_order *link_order_tail;
-.} asection ;
+.} asection;
.
.{* These sections are global, and are managed by BFD. The application
. and target back end are not permitted to change the values in
.#define BFD_COM_SECTION_NAME "*COM*"
.#define BFD_IND_SECTION_NAME "*IND*"
.
-.{* the absolute section *}
-.extern const asection bfd_abs_section;
+.{* 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 const asection bfd_und_section;
+.{* 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 const asection bfd_com_section;
+.{* Pointer to the common section. *}
+.extern asection bfd_com_section;
.#define bfd_com_section_ptr ((asection *) &bfd_com_section)
-.{* Pointer to the indirect section *}
-.extern const asection bfd_ind_section;
+.{* Pointer to the indirect section. *}
+.extern asection bfd_ind_section;
.#define bfd_ind_section_ptr ((asection *) &bfd_ind_section)
.#define bfd_is_ind_section(sec) ((sec) == bfd_ind_section_ptr)
.
-.extern const struct symbol_cache_entry * const bfd_abs_symbol;
-.extern const struct symbol_cache_entry * const bfd_com_symbol;
-.extern const struct symbol_cache_entry * const bfd_und_symbol;
-.extern const struct symbol_cache_entry * const bfd_ind_symbol;
+.#define bfd_is_const_section(SEC) \
+. ( ((SEC) == bfd_abs_section_ptr) \
+. || ((SEC) == bfd_und_section_ptr) \
+. || ((SEC) == bfd_com_section_ptr) \
+. || ((SEC) == bfd_ind_section_ptr))
+.
+.extern const struct bfd_symbol * const bfd_abs_symbol;
+.extern const struct bfd_symbol * const bfd_com_symbol;
+.extern const struct bfd_symbol * const bfd_und_symbol;
+.extern const struct bfd_symbol * const bfd_ind_symbol;
.#define bfd_get_section_size_before_reloc(section) \
-. ((section)->reloc_done ? (abort (), (bfd_size_type) 1) \
-. : (section)->_raw_size)
+. ((section)->_raw_size)
.#define bfd_get_section_size_after_reloc(section) \
. ((section)->reloc_done ? (section)->_cooked_size \
. : (abort (), (bfd_size_type) 1))
+.
+.{* Macros to handle insertion and deletion of a bfd's sections. These
+. only handle the list pointers, ie. do not adjust section_count,
+. target_index etc. *}
+.#define bfd_section_list_remove(ABFD, PS) \
+. do \
+. { \
+. asection **_ps = PS; \
+. asection *_s = *_ps; \
+. *_ps = _s->next; \
+. if (_s->next == NULL) \
+. (ABFD)->section_tail = _ps; \
+. } \
+. while (0)
+.#define bfd_section_list_insert(ABFD, PS, S) \
+. do \
+. { \
+. asection **_ps = PS; \
+. asection *_s = S; \
+. _s->next = *_ps; \
+. *_ps = _s; \
+. if (_s->next == NULL) \
+. (ABFD)->section_tail = &_s->next; \
+. } \
+. while (0)
+.
*/
/* We use a macro to initialize the static asymbol structures because
GLOBAL_SYM_INIT (BFD_IND_SECTION_NAME, &bfd_ind_section)
};
-#define STD_SECTION(SEC, FLAGS, SYM, NAME, IDX) \
- const asymbol * const SYM = (asymbol *) &global_syms[IDX]; \
- const asection SEC = \
- /* name, id, index, next, flags, user_set_vma, reloc_done, */ \
- { NAME, -1-(IDX), 0, NULL, FLAGS, 0, 0, \
+#define STD_SECTION(SEC, FLAGS, SYM, NAME, IDX) \
+ const asymbol * const SYM = (asymbol *) &global_syms[IDX]; \
+ asection SEC = \
+ /* name, id, index, next, flags, user_set_vma, reloc_done, */ \
+ { NAME, IDX, 0, NULL, FLAGS, 0, 0, \
+ \
+ /* linker_mark, linker_has_input, gc_mark, segment_mark, */ \
+ 0, 0, 1, 0, \
+ \
+ /* sec_info_type, use_rela_p, has_tls_reloc, */ \
+ 0, 0, 0, \
\
- /* linker_mark, gc_mark, vma, lma, _cooked_size, _raw_size, */ \
- 0, 0, 0, 0, 0, 0, \
+ /* need_finalize_relax, has_gp_reloc, */ \
+ 0, 0, \
+ \
+ /* flag13, flag14, flag15, flag16, flag20, flag24, */ \
+ 0, 0, 0, 0, 0, 0, \
+ \
+ /* vma, lma, _cooked_size, _raw_size, */ \
+ 0, 0, 0, 0, \
\
/* output_offset, output_section, alignment_power, */ \
- 0, (struct sec *) &SEC, 0, \
+ 0, (struct bfd_section *) &SEC, 0, \
\
/* relocation, orelocation, reloc_count, filepos, rel_filepos, */ \
NULL, NULL, 0, 0, 0, \
/* line_filepos, userdata, contents, lineno, lineno_count, */ \
0, NULL, NULL, NULL, 0, \
\
- /* comdat, moving_line_filepos, target_index, used_by_bfd, */ \
- NULL, 0, 0, NULL, \
+ /* entsize, comdat, kept_section, moving_line_filepos, */ \
+ 0, NULL, NULL, 0, \
\
- /* constructor_chain, owner, */ \
- NULL, NULL, \
+ /* target_index, used_by_bfd, constructor_chain, owner, */ \
+ 0, NULL, NULL, NULL, \
\
/* symbol, */ \
- (struct symbol_cache_entry *) &global_syms[IDX], \
+ (struct bfd_symbol *) &global_syms[IDX], \
\
/* symbol_ptr_ptr, */ \
- (struct symbol_cache_entry **) &SYM, \
+ (struct bfd_symbol **) &SYM, \
\
/* link_order_head, link_order_tail */ \
NULL, NULL \
STD_SECTION (bfd_ind_section, 0, bfd_ind_symbol, BFD_IND_SECTION_NAME, 3);
#undef STD_SECTION
+struct section_hash_entry
+{
+ struct bfd_hash_entry root;
+ asection section;
+};
+
+/* Initialize an entry in the section hash table. */
+
+struct bfd_hash_entry *
+bfd_section_hash_newfunc (struct bfd_hash_entry *entry,
+ struct bfd_hash_table *table,
+ const char *string)
+{
+ /* Allocate the structure if it has not already been allocated by a
+ subclass. */
+ if (entry == NULL)
+ {
+ entry = (struct bfd_hash_entry *)
+ bfd_hash_allocate (table, sizeof (struct section_hash_entry));
+ if (entry == NULL)
+ return entry;
+ }
+
+ /* Call the allocation method of the superclass. */
+ entry = bfd_hash_newfunc (entry, table, string);
+ if (entry != NULL)
+ memset (&((struct section_hash_entry *) entry)->section, 0,
+ sizeof (asection));
+
+ return entry;
+}
+
+#define section_hash_lookup(table, string, create, copy) \
+ ((struct section_hash_entry *) \
+ bfd_hash_lookup ((table), (string), (create), (copy)))
+
+/* 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;
+
+ /* Create a symbol whose only job is to point to this section. This
+ is useful for things like relocs which are relative to the base
+ of a section. */
+ newsect->symbol = bfd_make_empty_symbol (abfd);
+ if (newsect->symbol == NULL)
+ return NULL;
+
+ newsect->symbol->name = newsect->name;
+ newsect->symbol->value = 0;
+ newsect->symbol->section = newsect;
+ newsect->symbol->flags = BSF_SECTION_SYM;
+
+ newsect->symbol_ptr_ptr = &newsect->symbol;
+
+ if (! BFD_SEND (abfd, _new_section_hook, (abfd, newsect)))
+ return NULL;
+
+ section_id++;
+ abfd->section_count++;
+ *abfd->section_tail = newsect;
+ abfd->section_tail = &newsect->next;
+ return newsect;
+}
+
/*
DOCDD
INODE
These are the functions exported by the section handling part of BFD.
*/
+/*
+FUNCTION
+ bfd_section_list_clear
+
+SYNOPSIS
+ void bfd_section_list_clear (bfd *);
+
+DESCRIPTION
+ Clears the section list, and also resets the section count and
+ hash table entries.
+*/
+
+void
+bfd_section_list_clear (bfd *abfd)
+{
+ abfd->sections = NULL;
+ abfd->section_tail = &abfd->sections;
+ abfd->section_count = 0;
+ memset (abfd->section_htab.table, 0,
+ abfd->section_htab.size * sizeof (struct bfd_hash_entry *));
+}
+
/*
FUNCTION
bfd_get_section_by_name
SYNOPSIS
- asection *bfd_get_section_by_name(bfd *abfd, const char *name);
+ asection *bfd_get_section_by_name (bfd *abfd, const char *name);
DESCRIPTION
Run through @var{abfd} and return the one of the
*/
asection *
-bfd_get_section_by_name (abfd, name)
- bfd *abfd;
- const char *name;
+bfd_get_section_by_name (bfd *abfd, const char *name)
{
- asection *sect;
+ struct section_hash_entry *sh;
+
+ sh = section_hash_lookup (&abfd->section_htab, name, FALSE, FALSE);
+ if (sh != NULL)
+ return &sh->section;
- for (sect = abfd->sections; sect != NULL; sect = sect->next)
- if (!strcmp (sect->name, name))
- return sect;
return NULL;
}
+/*
+FUNCTION
+ bfd_get_unique_section_name
+
+SYNOPSIS
+ char *bfd_get_unique_section_name
+ (bfd *abfd, const char *templat, int *count);
+
+DESCRIPTION
+ Invent a section name that is unique in @var{abfd} by tacking
+ a dot and a digit suffix onto the original @var{templat}. If
+ @var{count} is non-NULL, then it specifies the first number
+ tried as a suffix to generate a unique name. The value
+ pointed to by @var{count} will be incremented in this case.
+*/
+
+char *
+bfd_get_unique_section_name (bfd *abfd, const char *templat, int *count)
+{
+ int num;
+ unsigned int len;
+ char *sname;
+
+ len = strlen (templat);
+ sname = bfd_malloc (len + 8);
+ if (sname == NULL)
+ return NULL;
+ memcpy (sname, templat, len);
+ num = 1;
+ if (count != NULL)
+ num = *count;
+
+ do
+ {
+ /* If we have a million sections, something is badly wrong. */
+ if (num > 999999)
+ abort ();
+ sprintf (sname + len, ".%d", num++);
+ }
+ while (section_hash_lookup (&abfd->section_htab, sname, FALSE, FALSE));
+
+ if (count != NULL)
+ *count = num;
+ return sname;
+}
/*
FUNCTION
bfd_make_section_old_way
SYNOPSIS
- asection *bfd_make_section_old_way(bfd *abfd, const char *name);
+ asection *bfd_make_section_old_way (bfd *abfd, const char *name);
DESCRIPTION
Create a new empty section called @var{name}
*/
-
asection *
-bfd_make_section_old_way (abfd, name)
- bfd *abfd;
- const char *name;
+bfd_make_section_old_way (bfd *abfd, const char *name)
{
- asection *sec = bfd_get_section_by_name (abfd, name);
- if (sec == (asection *) NULL)
+ struct section_hash_entry *sh;
+ asection *newsect;
+
+ if (abfd->output_has_begun)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return NULL;
+ }
+
+ if (strcmp (name, BFD_ABS_SECTION_NAME) == 0)
+ return bfd_abs_section_ptr;
+
+ if (strcmp (name, BFD_COM_SECTION_NAME) == 0)
+ return bfd_com_section_ptr;
+
+ if (strcmp (name, BFD_UND_SECTION_NAME) == 0)
+ return bfd_und_section_ptr;
+
+ if (strcmp (name, BFD_IND_SECTION_NAME) == 0)
+ return bfd_ind_section_ptr;
+
+ sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE);
+ if (sh == NULL)
+ return NULL;
+
+ newsect = &sh->section;
+ if (newsect->name != NULL)
{
- sec = bfd_make_section (abfd, name);
+ /* Section already exists. */
+ return newsect;
}
- return sec;
+
+ newsect->name = name;
+ return bfd_section_init (abfd, newsect);
}
/*
bfd_make_section_anyway
SYNOPSIS
- asection *bfd_make_section_anyway(bfd *abfd, const char *name);
+ asection *bfd_make_section_anyway (bfd *abfd, const char *name);
DESCRIPTION
Create a new empty section called @var{name} and attach it to the end of
*/
sec_ptr
-bfd_make_section_anyway (abfd, name)
- bfd *abfd;
- const char *name;
+bfd_make_section_anyway (bfd *abfd, const char *name)
{
- static int section_id = 0;
+ struct section_hash_entry *sh;
asection *newsect;
- asection **prev = &abfd->sections;
- asection *sect = abfd->sections;
if (abfd->output_has_begun)
{
return NULL;
}
- while (sect)
- {
- prev = §->next;
- sect = sect->next;
- }
-
- newsect = (asection *) bfd_zalloc (abfd, sizeof (asection));
- if (newsect == NULL)
+ sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE);
+ if (sh == NULL)
return NULL;
- newsect->name = name;
- newsect->id = section_id++;
- newsect->index = abfd->section_count++;
- newsect->flags = SEC_NO_FLAGS;
-
- newsect->userdata = NULL;
- newsect->contents = NULL;
- newsect->next = (asection *) NULL;
- newsect->relocation = (arelent *) NULL;
- newsect->reloc_count = 0;
- newsect->line_filepos = 0;
- newsect->owner = abfd;
- newsect->comdat = NULL;
-
- /* Create a symbol whos only job is to point to this section. This is
- useful for things like relocs which are relative to the base of a
- section. */
- newsect->symbol = bfd_make_empty_symbol (abfd);
- if (newsect->symbol == NULL)
- return NULL;
- newsect->symbol->name = name;
- newsect->symbol->value = 0;
- newsect->symbol->section = newsect;
- newsect->symbol->flags = BSF_SECTION_SYM;
-
- newsect->symbol_ptr_ptr = &newsect->symbol;
-
- if (BFD_SEND (abfd, _new_section_hook, (abfd, newsect)) != true)
+ newsect = &sh->section;
+ if (newsect->name != NULL)
{
- free (newsect);
- return NULL;
+ /* We are making a section of the same name. It can't go in
+ section_htab without generating a unique section name and
+ that would be pointless; We don't need to traverse the
+ hash table. */
+ newsect = bfd_zalloc (abfd, sizeof (asection));
+ if (newsect == NULL)
+ return NULL;
}
- *prev = newsect;
- return newsect;
+ newsect->name = name;
+ return bfd_section_init (abfd, newsect);
}
/*
bfd_make_section
SYNOPSIS
- asection *bfd_make_section(bfd *, const char *name);
+ asection *bfd_make_section (bfd *, const char *name);
DESCRIPTION
Like <<bfd_make_section_anyway>>, but return <<NULL>> (without calling
*/
asection *
-bfd_make_section (abfd, name)
- bfd *abfd;
- const char *name;
+bfd_make_section (bfd *abfd, const char *name)
{
- asection *sect = abfd->sections;
+ struct section_hash_entry *sh;
+ asection *newsect;
- if (strcmp (name, BFD_ABS_SECTION_NAME) == 0)
- {
- return bfd_abs_section_ptr;
- }
- if (strcmp (name, BFD_COM_SECTION_NAME) == 0)
- {
- return bfd_com_section_ptr;
- }
- if (strcmp (name, BFD_UND_SECTION_NAME) == 0)
+ if (abfd->output_has_begun)
{
- return bfd_und_section_ptr;
+ bfd_set_error (bfd_error_invalid_operation);
+ return NULL;
}
- if (strcmp (name, BFD_IND_SECTION_NAME) == 0)
- {
- return bfd_ind_section_ptr;
- }
+ if (strcmp (name, BFD_ABS_SECTION_NAME) == 0
+ || strcmp (name, BFD_COM_SECTION_NAME) == 0
+ || strcmp (name, BFD_UND_SECTION_NAME) == 0
+ || strcmp (name, BFD_IND_SECTION_NAME) == 0)
+ return NULL;
- while (sect)
+ sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE);
+ if (sh == NULL)
+ return NULL;
+
+ newsect = &sh->section;
+ if (newsect->name != NULL)
{
- if (!strcmp (sect->name, name))
- return NULL;
- sect = sect->next;
+ /* Section already exists. */
+ return NULL;
}
- /* The name is not already used; go ahead and make a new section. */
- return bfd_make_section_anyway (abfd, name);
+ newsect->name = name;
+ return bfd_section_init (abfd, newsect);
}
-
/*
FUNCTION
bfd_set_section_flags
SYNOPSIS
- boolean bfd_set_section_flags(bfd *abfd, asection *sec, flagword flags);
+ bfd_boolean bfd_set_section_flags
+ (bfd *abfd, asection *sec, flagword flags);
DESCRIPTION
Set the attributes of the section @var{sec} in the BFD
- @var{abfd} to the value @var{flags}. Return <<true>> on success,
- <<false>> on error. Possible error returns are:
+ @var{abfd} to the value @var{flags}. Return <<TRUE>> on success,
+ <<FALSE>> on error. Possible error returns are:
o <<bfd_error_invalid_operation>> -
The section cannot have one or more of the attributes
*/
-/*ARGSUSED*/
-boolean
-bfd_set_section_flags (abfd, section, flags)
- bfd *abfd ATTRIBUTE_UNUSED;
- sec_ptr section;
- flagword flags;
+bfd_boolean
+bfd_set_section_flags (bfd *abfd ATTRIBUTE_UNUSED,
+ sec_ptr section,
+ flagword flags)
{
#if 0
/* If you try to copy a text section from an input file (where it
if ((flags & bfd_applicable_section_flags (abfd)) != flags)
{
bfd_set_error (bfd_error_invalid_operation);
- return false;
+ return FALSE;
}
#endif
section->flags = flags;
- return true;
+ return TRUE;
}
-
/*
FUNCTION
bfd_map_over_sections
SYNOPSIS
- void bfd_map_over_sections(bfd *abfd,
- void (*func)(bfd *abfd,
- asection *sect,
- PTR obj),
- PTR obj);
+ void bfd_map_over_sections
+ (bfd *abfd,
+ void (*func) (bfd *abfd, asection *sect, void *obj),
+ void *obj);
DESCRIPTION
Call the provided function @var{func} for each section
attached to the BFD @var{abfd}, passing @var{obj} as an
argument. The function will be called as if by
-| func(abfd, the_section, obj);
+| func (abfd, the_section, obj);
- This is the prefered method for iterating over sections; an
+ This is the preferred method for iterating over sections; an
alternative would be to use a loop:
| section *p;
| for (p = abfd->sections; p != NULL; p = p->next)
-| func(abfd, p, ...)
-
+| func (abfd, p, ...)
*/
-/*VARARGS2*/
void
-bfd_map_over_sections (abfd, operation, user_storage)
- bfd *abfd;
- void (*operation) PARAMS ((bfd * abfd, asection * sect, PTR obj));
- PTR user_storage;
+bfd_map_over_sections (bfd *abfd,
+ void (*operation) (bfd *, asection *, void *),
+ void *user_storage)
{
asection *sect;
unsigned int i = 0;
abort ();
}
-
/*
FUNCTION
bfd_set_section_size
SYNOPSIS
- boolean bfd_set_section_size(bfd *abfd, asection *sec, bfd_size_type val);
+ bfd_boolean bfd_set_section_size
+ (bfd *abfd, asection *sec, bfd_size_type val);
DESCRIPTION
Set @var{sec} to the size @var{val}. If the operation is
- ok, then <<true>> is returned, else <<false>>.
+ ok, then <<TRUE>> is returned, else <<FALSE>>.
Possible error returns:
o <<bfd_error_invalid_operation>> -
*/
-boolean
-bfd_set_section_size (abfd, ptr, val)
- bfd *abfd;
- sec_ptr ptr;
- bfd_size_type val;
+bfd_boolean
+bfd_set_section_size (bfd *abfd, sec_ptr ptr, bfd_size_type val)
{
/* Once you've started writing to any section you cannot create or change
- the size of any others. */
+ the size of any others. */
if (abfd->output_has_begun)
{
bfd_set_error (bfd_error_invalid_operation);
- return false;
+ return FALSE;
}
ptr->_cooked_size = val;
ptr->_raw_size = val;
- return true;
+ return TRUE;
}
/*
bfd_set_section_contents
SYNOPSIS
- boolean bfd_set_section_contents
- (bfd *abfd,
- asection *section,
- PTR data,
- file_ptr offset,
- bfd_size_type count);
-
+ bfd_boolean bfd_set_section_contents
+ (bfd *abfd, asection *section, const void *data,
+ file_ptr offset, bfd_size_type count);
DESCRIPTION
Sets the contents of the section @var{section} in BFD
data is written to the output section starting at offset
@var{offset} for @var{count} octets.
-
-
- Normally <<true>> is returned, else <<false>>. Possible error
+ Normally <<TRUE>> is returned, else <<FALSE>>. Possible error
returns are:
o <<bfd_error_no_contents>> -
The output section does not have the <<SEC_HAS_CONTENTS>>
This routine is front end to the back end function
<<_bfd_set_section_contents>>.
-
*/
-#define bfd_get_section_size_now(abfd,sec) \
-(sec->reloc_done \
- ? bfd_get_section_size_after_reloc (sec) \
- : bfd_get_section_size_before_reloc (sec))
-
-boolean
-bfd_set_section_contents (abfd, section, location, offset, count)
- bfd *abfd;
- sec_ptr section;
- PTR location;
- file_ptr offset;
- bfd_size_type count;
+#define bfd_get_section_size_now(abfd, sec) \
+ (sec->reloc_done \
+ ? bfd_get_section_size_after_reloc (sec) \
+ : bfd_get_section_size_before_reloc (sec))
+
+bfd_boolean
+bfd_set_section_contents (bfd *abfd,
+ sec_ptr section,
+ const void *location,
+ file_ptr offset,
+ bfd_size_type count)
{
bfd_size_type sz;
if (!(bfd_get_section_flags (abfd, section) & SEC_HAS_CONTENTS))
{
bfd_set_error (bfd_error_no_contents);
- return (false);
+ return FALSE;
}
- if (offset < 0)
- {
- bad_val:
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
sz = bfd_get_section_size_now (abfd, section);
if ((bfd_size_type) offset > sz
|| count > sz
- || offset + count > sz)
- goto bad_val;
+ || offset + count > sz
+ || count != (size_t) count)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
switch (abfd->direction)
{
case read_direction:
case no_direction:
bfd_set_error (bfd_error_invalid_operation);
- return false;
+ return FALSE;
case write_direction:
break;
/* File is opened for update. `output_has_begun' some time ago when
the file was created. Do not recompute sections sizes or alignments
in _bfd_set_section_content. */
- abfd->output_has_begun = true;
+ abfd->output_has_begun = TRUE;
break;
}
+ /* Record a copy of the data in memory if desired. */
+ if (section->contents
+ && location != section->contents + offset)
+ memcpy (section->contents + offset, location, (size_t) count);
+
if (BFD_SEND (abfd, _bfd_set_section_contents,
(abfd, section, location, offset, count)))
{
- abfd->output_has_begun = true;
- return true;
+ abfd->output_has_begun = TRUE;
+ return TRUE;
}
- return false;
+ return FALSE;
}
/*
bfd_get_section_contents
SYNOPSIS
- boolean bfd_get_section_contents
- (bfd *abfd, asection *section, PTR location,
- file_ptr offset, bfd_size_type count);
+ bfd_boolean bfd_get_section_contents
+ (bfd *abfd, asection *section, void *location, file_ptr offset,
+ bfd_size_type count);
DESCRIPTION
Read data from @var{section} in BFD @var{abfd}
If the contents of a constructor with the <<SEC_CONSTRUCTOR>>
flag set are requested or if the section does not have the
<<SEC_HAS_CONTENTS>> flag set, then the @var{location} is filled
- with zeroes. If no errors occur, <<true>> is returned, else
- <<false>>.
-
-
+ with zeroes. If no errors occur, <<TRUE>> is returned, else
+ <<FALSE>>.
*/
-boolean
-bfd_get_section_contents (abfd, section, location, offset, count)
- bfd *abfd;
- sec_ptr section;
- PTR location;
- file_ptr offset;
- bfd_size_type count;
+bfd_boolean
+bfd_get_section_contents (bfd *abfd,
+ sec_ptr section,
+ void *location,
+ file_ptr offset,
+ bfd_size_type count)
{
bfd_size_type sz;
if (section->flags & SEC_CONSTRUCTOR)
{
- memset (location, 0, (unsigned) count);
- return true;
+ memset (location, 0, (size_t) count);
+ return TRUE;
}
- if (offset < 0)
+ /* Even if reloc_done is TRUE, this function reads unrelocated
+ contents, so we want the raw size. */
+ sz = section->_raw_size;
+ if ((bfd_size_type) offset > sz
+ || count > sz
+ || offset + count > sz
+ || count != (size_t) count)
{
- bad_val:
bfd_set_error (bfd_error_bad_value);
- return false;
+ return FALSE;
}
- /* Even if reloc_done is true, this function reads unrelocated
- contents, so we want the raw size. */
- sz = section->_raw_size;
- if ((bfd_size_type) offset > sz || count > sz || offset + count > sz)
- goto bad_val;
if (count == 0)
/* Don't bother. */
- return true;
+ return TRUE;
if ((section->flags & SEC_HAS_CONTENTS) == 0)
{
- memset (location, 0, (unsigned) count);
- return true;
+ memset (location, 0, (size_t) count);
+ return TRUE;
}
if ((section->flags & SEC_IN_MEMORY) != 0)
{
memcpy (location, section->contents + offset, (size_t) count);
- return true;
+ return TRUE;
}
return BFD_SEND (abfd, _bfd_get_section_contents,
bfd_copy_private_section_data
SYNOPSIS
- boolean bfd_copy_private_section_data(bfd *ibfd, asection *isec, bfd *obfd, asection *osec);
+ bfd_boolean bfd_copy_private_section_data
+ (bfd *ibfd, asection *isec, bfd *obfd, asection *osec);
DESCRIPTION
Copy private section information from @var{isec} in the BFD
@var{ibfd} to the section @var{osec} in the BFD @var{obfd}.
- Return <<true>> on success, <<false>> on error. Possible error
+ Return <<TRUE>> on success, <<FALSE>> on error. Possible error
returns are:
o <<bfd_error_no_memory>> -
SYNOPSIS
void _bfd_strip_section_from_output
- (struct bfd_link_info *info, asection *section);
+ (struct bfd_link_info *info, asection *section);
DESCRIPTION
Remove @var{section} from the output. If the output section
- becomes empty, remove it from the output bfd. @var{info} may
- be NULL; if it is not, it is used to decide whether the output
- section is empty.
+ becomes empty, remove it from the output bfd.
+
+ This function won't actually do anything except twiddle flags
+ if called too late in the linking process, when it's not safe
+ to remove sections.
*/
void
-_bfd_strip_section_from_output (info, s)
- struct bfd_link_info *info;
- asection *s;
+_bfd_strip_section_from_output (struct bfd_link_info *info, asection *s)
{
- asection **spp, *os;
- struct bfd_link_order *p, *pp;
- boolean keep_os;
+ asection *os;
+ asection *is;
+ bfd *abfd;
- /* Excise the input section from the link order.
+ s->flags |= SEC_EXCLUDE;
- FIXME: For all calls that I can see to this function, the link
- orders have not yet been set up. So why are we checking them? --
- Ian */
+ /* If the section wasn't assigned to an output section, or the
+ section has been discarded by the linker script, there's nothing
+ more to do. */
os = s->output_section;
- for (p = os->link_order_head, pp = NULL; p != NULL; pp = p, p = p->next)
- if (p->type == bfd_indirect_link_order
- && p->u.indirect.section == s)
- {
- if (pp)
- pp->next = p->next;
- else
- os->link_order_head = p->next;
- if (!p->next)
- os->link_order_tail = pp;
- break;
- }
-
- keep_os = os->link_order_head != NULL;
-
- if (! keep_os && info != NULL)
- {
- bfd *abfd;
- for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next)
- {
- asection *is;
- for (is = abfd->sections; is != NULL; is = is->next)
- {
- if (is != s && is->output_section == os)
- break;
- }
- if (is != NULL)
- break;
- }
- if (abfd != NULL)
- keep_os = true;
- }
+ if (os == NULL || os->owner == NULL)
+ return;
+
+ /* If the output section has other (non-excluded) input sections, we
+ can't remove it. */
+ for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next)
+ for (is = abfd->sections; is != NULL; is = is->next)
+ if (is->output_section == os && (is->flags & SEC_EXCLUDE) == 0)
+ return;
+
+ /* If the output section is empty, flag it for removal too.
+ See ldlang.c:strip_excluded_output_sections for the action. */
+ os->flags |= SEC_EXCLUDE;
+}
- /* If the output section is empty, remove it too. Careful about sections
- that have been discarded in the link script -- they are mapped to
- bfd_abs_section, which has no owner. */
- if (!keep_os && os->owner != NULL)
- {
- for (spp = &os->owner->sections; *spp; spp = &(*spp)->next)
- if (*spp == os)
- {
- *spp = os->next;
- os->owner->section_count--;
- break;
- }
- }
+/*
+FUNCTION
+ bfd_generic_discard_group
+
+SYNOPSIS
+ bfd_boolean bfd_generic_discard_group (bfd *abfd, asection *group);
+
+DESCRIPTION
+ Remove all members of @var{group} from the output.
+*/
+
+bfd_boolean
+bfd_generic_discard_group (bfd *abfd ATTRIBUTE_UNUSED,
+ asection *group ATTRIBUTE_UNUSED)
+{
+ return TRUE;
}
projects / binutils.git / blobdiff