diff options
Diffstat (limited to 'bfd')
| -rw-r--r-- | bfd/section.c | 95 |
1 files changed, 59 insertions, 36 deletions
diff --git a/bfd/section.c b/bfd/section.c index e4188a4..35d084a 100644 --- a/bfd/section.c +++ b/bfd/section.c @@ -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; |