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(struct sec): Move position of user_set_vma, and document it.

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(SEC_BALIGN): Disable for now.  I don't think it's currently used.
This commit is contained in:
Ken Raeburn 1993-08-27 23:56:49 +00:00
parent f153827490
commit a8a4b6b5d9
1 changed files with 59 additions and 36 deletions
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95
bfd/section.c
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@ -152,7 +152,6 @@ CODE_FRAGMENT
.
. CONST char *name;
.
.
. {* Which section is it 0.nth *}
.
. int index;
@ -172,36 +171,31 @@ CODE_FRAGMENT
. {* Tells the OS to allocate space for this section when loaded.
. This would clear for a section containing debug information
. only. *}
.
.
.#define SEC_ALLOC 0x001
.
. {* Tells the OS to load the section from the file when loading.
. This would be clear for a .bss section *}
.
.#define SEC_LOAD 0x002
.
. {* The section contains data still to be relocated, so there will
. be some relocation information too. *}
.
.#define SEC_RELOC 0x004
.
. {* Obsolete ? *}
.
.#if 0 {* Obsolete ? *}
.#define SEC_BALIGN 0x008
.#endif
.
. {* A signal to the OS that the section contains read only
. data. *}
.#define SEC_READONLY 0x010
.
. {* The section contains code only. *}
.
.#define SEC_CODE 0x020
.
. {* The section contains data only. *}
.
.#define SEC_DATA 0x040
.#define SEC_DATA 0x040
.
. {* The section will reside in ROM. *}
.
.#define SEC_ROM 0x080
.
. {* The section contains constructor information. This section
@ -214,47 +208,54 @@ CODE_FRAGMENT
. sections called <<__CTOR_LIST__>> and relocte the data
. contained within - exactly the operations it would peform on
. standard data. *}
.
.#define SEC_CONSTRUCTOR 0x100
.
. {* The section is a constuctor, and should be placed at the
. end of 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>> *}
.
.#define SEC_HAS_CONTENTS 0x200
.
. {* An instruction to the linker not to output sections
. containing this flag even if they have information which
. would normally be written. *}
.
.#define SEC_NEVER_LOAD 0x400
.
. {* The section is a shared library section. The linker must leave
. these completely alone, as the vma and size are used when
. the executable is loaded. *}
.
.#define SEC_SHARED_LIBRARY 0x800
.
. {* The section is a common section (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
. used). Most targets have exactly one of these (.bss), but
. ECOFF has two. *}
.
. used). Most targets have exactly one of these (which we
. translate to bfd_com_section), but ECOFF has two. *}
.#define SEC_IS_COMMON 0x8000
.
.
. {* End of section flags. *}
.
. {* The virtual memory address of the section - where it will be
. at run time. The symbols are relocated against this. The
. user_set_vma flag is maintained by bfd; if it's not set, the
. 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;
. boolean user_set_vma;
.
. {* The load address of the section - where it would be in a
. rom image, really only used for writing section header
. information. *}
.
. bfd_vma lma;
.
. {* The size of the section in bytes, as it will be output.
. contains a value even if the section has no contents (eg, the
. size of <<.bss>>). This will be filled in after relocation *}
@ -298,9 +299,9 @@ CODE_FRAGMENT
. unsigned reloc_count;
.
. {* Information below is back end specific - and not always used
. or updated
. or updated. *}
.
. File position of section data *}
. {* File position of section data *}
.
. file_ptr filepos;
.
@ -350,29 +351,33 @@ CODE_FRAGMENT
. {* A symbol which points at this section only *}
. struct symbol_cache_entry *symbol;
. struct symbol_cache_entry **symbol_ptr_ptr;
.
. struct bfd_seclet *seclets_head;
. struct bfd_seclet *seclets_tail;
.} asection ;
.
.
. {* 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. *}
.#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;
.extern asection bfd_abs_section;
. {* Pointer to the undefined section *}
. extern asection bfd_und_section;
.extern asection bfd_und_section;
. {* Pointer to the common section *}
. extern asection bfd_com_section;
.extern asection bfd_com_section;
. {* Pointer to the indirect section *}
. extern asection bfd_ind_section;
.extern asection bfd_ind_section;
.
. extern struct symbol_cache_entry *bfd_abs_symbol;
. extern struct symbol_cache_entry *bfd_com_symbol;
. extern struct symbol_cache_entry *bfd_und_symbol;
. extern struct symbol_cache_entry *bfd_ind_symbol;
.extern struct symbol_cache_entry *bfd_abs_symbol;
.extern struct symbol_cache_entry *bfd_com_symbol;
.extern struct symbol_cache_entry *bfd_und_symbol;
.extern struct symbol_cache_entry *bfd_ind_symbol;
.#define bfd_get_section_size_before_reloc(section) \
. (section->reloc_done ? (abort(),1): (section)->_raw_size)
.#define bfd_get_section_size_after_reloc(section) \
@ -391,7 +396,7 @@ static CONST asymbol global_syms[] = {
#define STD_SECTION(SEC, FLAGS, SYM, NAME, IDX) \
asymbol *SYM = (asymbol *) &global_syms[IDX]; \
asection SEC = { NAME, 0, 0, FLAGS, 0, (boolean) 0, 0, 0, 0, &SEC,\
asection SEC = { NAME, 0, 0, FLAGS, 0, 0, (boolean) 0, 0, 0, 0, &SEC,\
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (boolean) 0, \
(asymbol *) &global_syms[IDX], &SYM, }
@ -757,7 +762,7 @@ DEFUN(bfd_set_section_contents,(abfd, section, location, offset, count),
return(false);
}
if (offset < 0 || count < 0)
if (offset < 0)
{
bad_val:
bfd_error = bad_value;
@ -769,6 +774,24 @@ DEFUN(bfd_set_section_contents,(abfd, section, location, offset, count),
|| offset + count > sz)
goto bad_val;
switch (abfd->direction)
{
case read_direction:
case no_direction:
bfd_error = invalid_operation;
return false;
case write_direction:
break;
case both_direction:
/* 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;
break;
}
if (BFD_SEND (abfd, _bfd_set_section_contents,
(abfd, section, location, offset, count)))
{
@ -818,7 +841,7 @@ DEFUN(bfd_get_section_contents,(abfd, section, location, offset, count),
return true;
}
if (offset < 0 || count < 0)
if (offset < 0)
{
bad_val:
bfd_error = bad_value;