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Update from bfd.c et al

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This commit is contained in:
Steve Chamberlain 1991-12-08 20:05:21 +00:00
parent dda14b63ff
commit 332b63272f
1 changed files with 489 additions and 81 deletions
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570
include/bfd.h
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@ -331,10 +331,8 @@ bfd *EXFUN(bfd_fdopenr, (CONST char *filename, CONST char *target, int fd));
bfd *EXFUN(bfd_openw, (CONST char *filename, CONST char *target));
boolean EXFUN(bfd_close, (bfd *));
boolean EXFUN(bfd_close_all_done, (bfd *));
bfd *EXFUN(bfd_create, (CONST char *filename, bfd *template));
bfd_size_type EXFUN(bfd_alloc_size, (bfd *abfd));
PTR EXFUN(bfd_xmalloc, ( bfd_size_type size));
void EXFUN(bfd_write_bigendian_4byte_int, (bfd *abfd, int i));
bfd *EXFUN(bfd_create, (CONST char *filename, bfd *template));
#define bfd_put_8(abfd, val, ptr) \
(*((char *)ptr) = (char)val)
#define bfd_get_8(abfd, ptr) \
@ -367,46 +365,190 @@ void EXFUN(bfd_write_bigendian_4byte_int, (bfd *abfd, int i));
BFD_SEND(abfd, bfd_h_putx64,(val, ptr))
#define bfd_h_get_64(abfd, ptr) \
BFD_SEND(abfd, bfd_h_getx64,(ptr))
typedef struct sec {
typedef struct sec
{
/* 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;
/* The next section in the list belonging to the BFD, or NULL. */
struct sec *next;
/* The field flags contains attributes of the section. Some of
flags are read in from the object file, and some are
synthesized from other information. */
flagword flags;
#define SEC_NO_FLAGS 0x000
/* 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 ? */
#define SEC_BALIGN 0x008
/* 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
/* The section will reside in ROM. */
#define SEC_ROM 0x080
/* The section contains constructor information. This section
type is used by the linker to create lists of constructors and
destructors used by <<g++>>. When a back end sees a symbol
which should be used in a constructor list, it creates a new
section for the type of name (eg <<__CTOR_LIST__>>), attaches
the symbol to it and builds a relocation. To build the lists
of constructors, all the linker has to to is catenate all the
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 . */
#define SEC_CONSTRUCTOR_TEXT 0x1100
#define SEC_CONSTRUCTOR_DATA 0x2100
#define SEC_CONSTRUCTOR_BSS 0x3100
/* The section has contents - a bss 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 base address of the section in the address space of the
target. */
bfd_vma vma;
/* The size of the section in bytes of the loaded section. This
contains a value even if the section has no contents (eg, the
size of <<.bss>>). */
bfd_size_type size;
/* If this section is going to be output, then this value is the
offset into the output section of the first byte in the input
section. Eg, if this was going to start at the 100th byte in
the output section, this value would be 100. */
bfd_vma output_offset;
/* The output section through which to map on output. */
struct sec *output_section;
/* The alignment requirement of the section, as an exponent - eg
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 */
unsigned reloc_count;
/* Which section is it 0.nth */
int index;
/* 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;
struct lang_output_section *otheruserdata;
/* Attached line number information */
alent *lineno;
/* Number of line number records */
unsigned int lineno_count;
/* 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 */
unsigned int target_index;
PTR 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;
} asection ;
asection *EXFUN(bfd_get_section_by_name, (bfd *abfd, CONST char *name));
asection *EXFUN(bfd_make_section_old_way, (bfd *, CONST char *name));
@ -415,14 +557,14 @@ boolean EXFUN(bfd_set_section_flags, (bfd *, asection *, flagword));
void EXFUN(bfd_map_over_sections, (bfd *abfd, void (*func)(), PTR obj));
boolean EXFUN(bfd_set_section_size, (bfd *, asection *, bfd_size_type val));
boolean EXFUN(bfd_set_section_contents
, (bfd *abfd,
asection *section,
PTR data,
file_ptr offset,
bfd_size_type count));
, (bfd *abfd,
asection *section,
PTR data,
file_ptr offset,
bfd_size_type count));
boolean EXFUN(bfd_get_section_contents
, (bfd *abfd, asection *section, PTR location,
file_ptr offset, bfd_size_type count));
, (bfd *abfd, asection *section, PTR location,
file_ptr offset, bfd_size_type count));
enum bfd_architecture
{
bfd_arch_unknown, /* File arch not known */
@ -492,9 +634,8 @@ typedef struct bfd_arch_info
CONST char *EXFUN(bfd_printable_name, (bfd *abfd));
bfd_arch_info_type *EXFUN(bfd_scan_arch, (CONST char *));
CONST bfd_arch_info_type *EXFUN(bfd_arch_get_compatible, (
CONST bfd *abfd,
CONST bfd *bbfd));
extern bfd_arch_info_type bfd_default_arch_struct;
CONST bfd *abfd,
CONST bfd *bbfd));
void EXFUN(bfd_set_arch_info, (bfd *, bfd_arch_info_type *));
enum bfd_architecture EXFUN(bfd_get_arch, (bfd *abfd));
unsigned long EXFUN(bfd_get_mach, (bfd *abfd));
@ -502,66 +643,153 @@ unsigned int EXFUN(bfd_arch_bits_per_byte, (bfd *abfd));
unsigned int EXFUN(bfd_arch_bits_per_address, (bfd *abfd));
bfd_arch_info_type * EXFUN(bfd_get_arch_info, (bfd *));
bfd_arch_info_type *EXFUN(bfd_lookup_arch
, (enum bfd_architecture
arch,
long machine));
, (enum bfd_architecture
arch,
long machine));
CONST char * EXFUN(bfd_printable_arch_mach
, (enum bfd_architecture arch, unsigned long machine));
typedef enum bfd_reloc_status {
, (enum bfd_architecture arch, unsigned long machine));
typedef enum bfd_reloc_status
{
/* No errors detected */
bfd_reloc_ok,
/* The relocation was performed, but there was an overflow. */
bfd_reloc_overflow,
/* The address to relocate was not within the section supplied*/
bfd_reloc_outofrange,
/* Used by special functions */
bfd_reloc_continue,
/* Unused */
bfd_reloc_notsupported,
/* Unsupported relocation size requested. */
bfd_reloc_other,
/* The symbol to relocate against was undefined.*/
bfd_reloc_undefined,
/* The relocation was performed, but may not be ok - presently
generated only when linking i960 coff files with i960 b.out
symbols. */
bfd_reloc_dangerous
}
}
bfd_reloc_status_type;
typedef struct reloc_cache_entry
{
/* A pointer into the canonical table of pointers */
struct symbol_cache_entry **sym_ptr_ptr;
/* offset in section */
rawdata_offset address;
/* addend for relocation value */
bfd_vma addend;
/* if sym is null this is the section */
struct sec *section;
/* Pointer to how to perform the required relocation */
CONST struct reloc_howto_struct *howto;
} arelent;
typedef CONST struct reloc_howto_struct
{
/* The type field has mainly a documetary use - the back end can
to what it wants with it, though the normally the back end's
external idea of what a reloc number would be would be stored
in this field. For example, the a PC relative word relocation
in a coff environment would have the type 023 - because that's
what the outside world calls a R_PCRWORD reloc. */
unsigned int type;
/* The value the final relocation is shifted right by. This drops
unwanted data from the relocation. */
unsigned int rightshift;
/* The size of the item to be relocated - 0, is one byte, 1 is 2
bytes, 3 is four bytes. */
unsigned int size;
/* Now obsolete */
unsigned int bitsize;
/* Notes that the relocation is relative to the location in the
data section of the addend. The relocation function will
subtract from the relocation value the address of the location
being relocated. */
boolean pc_relative;
/* Now obsolete */
unsigned int bitpos;
/* Now obsolete */
boolean absolute;
/* Causes the relocation routine to return an error if overflow
is detected when relocating. */
boolean complain_on_overflow;
/* If this field is non null, then the supplied function is
called rather than the normal function. This allows really
strange relocation methods to be accomodated (eg, i960 callj
instructions). */
bfd_reloc_status_type (*special_function)();
/* The textual name of the relocation type. */
char *name;
/* When performing a partial link, some formats must modify the
relocations rather than the data - this flag signals this.*/
boolean partial_inplace;
/* The src_mask is used to select what parts of the read in data
are to be used in the relocation sum. Eg, if this was an 8 bit
bit of data which we read and relocated, this would be
0x000000ff. When we have relocs which have an addend, such as
sun4 extended relocs, the value in the offset part of a
relocating field is garbage so we never use it. In this case
the mask would be 0x00000000. */
bfd_word src_mask;
/* The dst_mask is what parts of the instruction are replaced
into the instruction. In most cases src_mask == dst_mask,
except in the above special case, where dst_mask would be
0x000000ff, and src_mask would be 0x00000000. */
bfd_word dst_mask;
/* When some formats create PC relative instructions, they leave
the value of the pc of the place being relocated in the offset
slot of the instruction, so that a PC relative relocation can
be made just by adding in an ordinary offset (eg sun3 a.out).
Some formats leave the displacement part of an instruction
empty (eg m88k bcs), this flag signals the fact.*/
boolean pcrel_offset;
} reloc_howto_type;
#define HOWTO(C, R,S,B, P, BI, ABS, O, SF, NAME, INPLACE, MASKSRC, MASKDST, PC) \
{(unsigned)C,R,S,B, P, BI, ABS,O,SF,NAME,INPLACE,MASKSRC,MASKDST,PC}
#define NEWHOWTO( FUNCTION, NAME,SIZE,REL,IN) HOWTO(0,0,SIZE,0,REL,0,false,false,FUNCTION, NAME,false,0,0,IN)
#define HOWTO_PREPARE(relocation, symbol) \
{ \
if (symbol != (asymbol *)NULL) { \
if (symbol->flags & BSF_FORT_COMM) { \
relocation = 0; \
} \
else { \
relocation = symbol->value; \
} \
} \
if (symbol->section != (asection *)NULL) { \
relocation += symbol->section->output_section->vma + \
symbol->section->output_offset; \
} \
}
#define HOWTO_PREPARE(relocation, symbol) \
{ \
if (symbol != (asymbol *)NULL) { \
if (symbol->flags & BSF_FORT_COMM) { \
relocation = 0; \
} \
else { \
relocation = symbol->value; \
} \
} \
if (symbol->section != (asection *)NULL) { \
relocation += symbol->section->output_section->vma + \
symbol->section->output_offset; \
} \
}
typedef unsigned char bfd_byte;
typedef struct relent_chain {
@ -570,49 +798,140 @@ typedef struct relent_chain {
} arelent_chain;
bfd_reloc_status_type
EXFUN(bfd_perform_relocation
, (bfd * abfd,
arelent *reloc_entry,
PTR data,
asection *input_section,
bfd *output_bfd));
typedef enum bfd_reloc_code_real {
BFD_RELOC_16,
, (bfd * abfd,
arelent *reloc_entry,
PTR data,
asection *input_section,
bfd *output_bfd));
typedef enum bfd_reloc_code_real
{
/* 16 bits wide, simple reloc */
BFD_RELOC_16,
/* 8 bits wide, but used to form an address like 0xffnn */
BFD_RELOC_8_FFnn,
/* 8 bits wide, simple */
BFD_RELOC_8,
/* 8 bits wide, pc relative */
BFD_RELOC_8_PCREL,
/* The type of reloc used to build a contructor table - at the
moment probably a 32 bit wide abs address, but the cpu can
choose. */
BFD_RELOC_CTOR
} bfd_reloc_code_real_type;
CONST struct reloc_howto_struct *
EXFUN(bfd_reloc_type_lookup
, (CONST bfd_arch_info_type *arch, bfd_reloc_code_type code));
, (CONST bfd_arch_info_type *arch, bfd_reloc_code_type code));
typedef struct symbol_cache_entry
{
/* A pointer to the BFD which owns the symbol. This information
is necessary so that a back end can work out what additional
(invisible to the application writer) information is carried
with the symbol. */
struct _bfd *the_bfd;
CONST char *name;
symvalue value;
/* The text of the symbol. The name is left alone, and not copied - the
application may not alter it. */
CONST char *name;
/* The value of the symbol.*/
symvalue value;
/* Attributes of a symbol: */
#define BSF_NO_FLAGS 0x00
/* The symbol has local scope; <<static>> in <<C>>. The value
is the offset into the section of the data. */
#define BSF_LOCAL 0x01
/* The symbol has global scope; initialized data in <<C>>. The
value is the offset into the section of the data. */
#define BSF_GLOBAL 0x02
/* Obsolete */
#define BSF_IMPORT 0x04
/* The symbol has global scope, and is exported. The value is
the offset into the section of the data. */
#define BSF_EXPORT 0x08
/* The symbol is undefined. <<extern>> in <<C>>. The value has
no meaning. */
#define BSF_UNDEFINED 0x10
/* The symbol is common, initialized to zero; default in
<<C>>. The value is the size of the object in bytes. */
#define BSF_FORT_COMM 0x20
/* A normal C symbol would be one of:
<<BSF_LOCAL>>, <<BSF_FORT_COMM>>, <<BSF_UNDEFINED>> or
<<BSF_EXPORT|BSD_GLOBAL>> */
/* The symbol is a debugging record. The value has an arbitary
meaning. */
#define BSF_DEBUGGING 0x40
/* The symbol has no section attached, any value is the actual
value and is not a relative offset to a section. */
#define BSF_ABSOLUTE 0x80
/* Used by the linker */
#define BSF_KEEP 0x10000
#define BSF_KEEP_G 0x80000
/* Unused */
#define BSF_WEAK 0x100000
#define BSF_CTOR 0x200000
#define BSF_FAKE 0x400000
/* The symbol used to be a common symbol, but now it is
allocated. */
#define BSF_OLD_COMMON 0x800000
/* The default value for common data. */
#define BFD_FORT_COMM_DEFAULT_VALUE 0
/* In some files the type of a symbol sometimes alters its
location in an output file - ie in coff a <<ISFCN>> symbol
which is also <<C_EXT>> symbol appears where it was
declared and not at the end of a section. This bit is set
by the target BFD part to convey this information. */
#define BSF_NOT_AT_END 0x40000
/* Signal that the symbol is the label of constructor section. */
#define BSF_CONSTRUCTOR 0x1000000
/* Signal that the symbol is a warning symbol. If the symbol
is a warning symbol, then the value field (I know this is
tacky) will point to the asymbol which when referenced will
cause the warning. */
#define BSF_WARNING 0x2000000
/* Signal that the symbol is indirect. The value of the symbol
is a pointer to an undefined asymbol which contains the
name to use instead. */
#define BSF_INDIRECT 0x4000000
flagword flags;
/* A pointer to the section to which this symbol is relative,
or 0 if the symbol is absolute or undefined. Note that it
is not sufficient to set this location to 0 to mark a
symbol as absolute - the flag <<BSF_ABSOLUTE>> must be set
also. */
struct sec *section;
/* Back end special data. This is being phased out in favour
of making this a union. */
PTR udata;
} asymbol;
#define get_symtab_upper_bound(abfd) \
BFD_SEND (abfd, _get_symtab_upper_bound, (abfd))
@ -626,47 +945,136 @@ void EXFUN(bfd_print_symbol_vandf, (PTR file, asymbol *symbol));
int EXFUN(bfd_decode_symclass, (asymbol *symbol));
struct _bfd
{
CONST char *filename;
struct bfd_target *xvec;
char *iostream;
boolean cacheable;
boolean target_defaulted;
struct _bfd *lru_prev, *lru_next;
file_ptr where;
boolean opened_once;
boolean mtime_set;
long mtime;
int ifd;
bfd_format format;
enum bfd_direction {no_direction = 0,
read_direction = 1,
write_direction = 2,
both_direction = 3} direction;
flagword flags;
file_ptr origin;
boolean output_has_begun;
struct sec *sections;
unsigned int section_count;
bfd_vma start_address;
unsigned int symcount;
struct symbol_cache_entry **outsymbols;
struct bfd_arch_info *arch_info;
PTR arelt_data;
struct _bfd *my_archive;
struct _bfd *next;
struct _bfd *archive_head;
boolean has_armap;
PTR tdata;
PTR usrdata;
struct obstack memory;
/* The filename the application opened the BFD with. */
CONST char *filename;
/* A pointer to the target jump table. */
struct bfd_target *xvec;
/* To avoid dragging too many header files into every file that
includes @file{bfd.h}, IOSTREAM has been declared as a "char
*", and MTIME as a "long". Their correct types, to which they
are cast when used, are "FILE *" and "time_t". The iostream
is the result of an fopen on the filename. */
char *iostream;
/* Is the file being cached */
boolean cacheable;
/* Marks whether there was a default target specified when the
BFD was opened. This is used to select what matching algorithm
to use to chose the back end. */
boolean target_defaulted;
/* The caching routines use these to maintain a
least-recently-used list of BFDs */
struct _bfd *lru_prev, *lru_next;
/* When a file is closed by the caching routines, BFD retains
state information on the file here:
*/
file_ptr where;
/* and here:*/
boolean opened_once;
/* Set if we have a locally maintained mtime value, rather than
getting it from the file each time: */
boolean mtime_set;
/* File modified time, if mtime_set is true: */
long mtime;
/* Reserved for an unimplemented file locking extension.*/
int ifd;
/* The format which belongs to the BFD.*/
bfd_format format;
/* The direction the BFD was opened with*/
enum bfd_direction {no_direction = 0,
read_direction = 1,
write_direction = 2,
both_direction = 3} direction;
/* Format_specific flags*/
flagword flags;
/* Currently my_archive is tested before adding origin to
anything. I believe that this can become always an add of
origin, with origin set to 0 for non archive files. */
file_ptr origin;
/* Remember when output has begun, to stop strange things
happening. */
boolean output_has_begun;
/* Pointer to linked list of sections*/
struct sec *sections;
/* The number of sections */
unsigned int section_count;
/* Stuff only useful for object files:
The start address. */
bfd_vma start_address;
/* Used for input and output*/
unsigned int symcount;
/* Symbol table for output BFD*/
struct symbol_cache_entry **outsymbols;
/* Pointer to structure which contains architecture information*/
struct bfd_arch_info *arch_info;
/* Stuff only useful for archives:*/
PTR arelt_data;
struct _bfd *my_archive;
struct _bfd *next;
struct _bfd *archive_head;
boolean has_armap;
/* Used by the back end to hold private data. */
PTR tdata;
/* Used by the application to hold private data*/
PTR usrdata;
/* Where all the allocated stuff under this BFD goes */
struct obstack memory;
};
unsigned int EXFUN(bfd_get_reloc_upper_bound, (bfd *abfd, asection *sect));
unsigned int EXFUN(bfd_canonicalize_reloc
, (bfd *abfd,
asection *sec,
arelent **loc,
asymbol **syms));
boolean EXFUN(bfd_set_file_flags, (bfd *abfd, flagword flags));
void EXFUN(bfd_set_reloc
, (bfd *abfd, asection *sec, arelent **rel, unsigned int count)
);
boolean EXFUN(bfd_set_start_address, (bfd *, bfd_vma));
long EXFUN(bfd_get_mtime, (bfd *));
#define bfd_sizeof_headers(abfd, reloc) \
BFD_SEND (abfd, _bfd_sizeof_headers, (abfd, reloc))
#define bfd_find_nearest_line(abfd, section, symbols, offset, filename_ptr, func, line_ptr) \
BFD_SEND (abfd, _bfd_find_nearest_line, (abfd, section, symbols, offset, filename_ptr, func, line_ptr))
#define bfd_find_nearest_line(abfd, sec, syms, off, file, func, line) \
BFD_SEND (abfd, _bfd_find_nearest_line, (abfd, sec, syms, off, file, func, line))
#define bfd_debug_info_start(abfd) \
BFD_SEND (abfd, _bfd_debug_info_start, (abfd))
@ -720,7 +1128,7 @@ bfd* EXFUN(bfd_openr_next_archived_file, (bfd *archive, bfd *previous));
CONST char *EXFUN(bfd_core_file_failing_command, (bfd *));
int EXFUN(bfd_core_file_failing_signal, (bfd *));
boolean EXFUN(core_file_matches_executable_p
, (bfd *core_bfd, bfd *exec_bfd));
, (bfd *core_bfd, bfd *exec_bfd));
#define SDEF(ret, name, arglist) \
PROTO(ret,(*name),arglist)
#define SDEF_FMT(ret, name, arglist) \