* This code is derived from software copyrighted by the Free Software
* Modified 1991 by Donn Seeley at UUNET Technologies, Inc.
static char sccsid
[] = "@(#)ld.c 8.1 (Berkeley) 6/6/93";
Copyright (C) 1988 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Written by Richard Stallman with some help from Eric Albert.
Set, indirect, and warning symbol features added by Randy Smith. */
/* Define how to initialize system-dependent header fields. */
#include <sys/resource.h>
/* symseg.h defines the obsolete GNU debugging format; we should nuke it. */
#define CORE_ADDR unsigned long /* For symseg.h */
#define N_SET_MAGIC(exec, val) ((exec).a_magic = val)
/* If compiled with GNU C, use the built-in alloca */
#define alloca __builtin_alloca
#define min(a,b) ((a) < (b) ? (a) : (b))
/* Macro to control the number of undefined references printed */
#define MAX_UREFS_PRINTED 10
/* Size of a page; obtained from the operating system. */
/* Name this program was invoked by. */
/* System dependencies */
/* Define this to specify the default executable format. */
#define DEFAULT_MAGIC ZMAGIC
#if defined(hp300) || defined(luna68k)
#define INITIALIZE_HEADER outheader.a_mid = MID_HP300
#define INITIALIZE_HEADER \
(outheader.a_mid = MID_SUN_SPARC, outheader.a_toolversion = 1)
* Ok. Following are the relocation information macros. If your
* system should not be able to use the default set (below), you must
* relocation_info: This must be typedef'd (or #define'd) to the type
* of structure that is stored in the relocation info section of your
* a.out files. Often this is defined in the a.out.h for your system.
* RELOC_ADDRESS (rval): Offset into the current section of the
* <whatever> to be relocated. *Must be an lvalue*.
* RELOC_EXTERN_P (rval): Is this relocation entry based on an
* external symbol (1), or was it fully resolved upon entering the
* loader (0) in which case some combination of the value in memory
* (if RELOC_MEMORY_ADD_P) and the extra (if RELOC_ADD_EXTRA) contains
* what the value of the relocation actually was. *Must be an lvalue*.
* RELOC_TYPE (rval): If this entry was fully resolved upon
* entering the loader, what type should it be relocated as?
* RELOC_SYMBOL (rval): If this entry was not fully resolved upon
* entering the loader, what is the index of it's symbol in the symbol
* table? *Must be a lvalue*.
* RELOC_MEMORY_ADD_P (rval): This should return true if the final
* relocation value output here should be added to memory, or if the
* section of memory described should simply be set to the relocation
* RELOC_ADD_EXTRA (rval): (Optional) This macro, if defined, gives
* an extra value to be added to the relocation value based on the
* individual relocation entry. *Must be an lvalue if defined*.
* RELOC_PCREL_P (rval): True if the relocation value described is
* RELOC_VALUE_RIGHTSHIFT (rval): Number of bits right to shift the
* final relocation value before putting it where it belongs.
* RELOC_TARGET_SIZE (rval): log to the base 2 of the number of
* bytes of size this relocation entry describes; 1 byte == 0; 2 bytes
* == 1; 4 bytes == 2, and etc. This is somewhat redundant (we could
* do everything in terms of the bit operators below), but having this
* macro could end up producing better code on machines without fancy
* bit twiddling. Also, it's easier to understand/code big/little
* endian distinctions with this macro.
* RELOC_TARGET_BITPOS (rval): The starting bit position within the
* object described in RELOC_TARGET_SIZE in which the relocation value
* RELOC_TARGET_BITSIZE (rval): How many bits are to be replaced
* with the bits of the relocation value. It may be assumed by the
* code that the relocation value will fit into this many bits. This
* may be larger than RELOC_TARGET_SIZE if such be useful.
* Things I haven't implemented
* ----------------------------
* Values for RELOC_TARGET_SIZE other than 0, 1, or 2.
* Pc relative relocation for External references.
/* The following #if has been modifed for cross compilation */
/* It originally read: #if defined(sun) && defined(sparc) */
/* Marc Ullman, Stanford University Nov. 1 1989 */
#if defined(sun) && (TARGET == SUN4)
/* Sparc (Sun 4) macros */
#define relocation_info reloc_info_sparc
#define RELOC_ADDRESS(r) ((r)->r_address)
#define RELOC_EXTERN_P(r) ((r)->r_extern)
#define RELOC_TYPE(r) ((r)->r_index)
#define RELOC_SYMBOL(r) ((r)->r_index)
#define RELOC_MEMORY_SUB_P(r) 0
#define RELOC_MEMORY_ADD_P(r) 0
#define RELOC_ADD_EXTRA(r) ((r)->r_addend)
#define RELOC_PCREL_P(r) \
((r)->r_type >= RELOC_DISP8 && (r)->r_type <= RELOC_WDISP22)
#define RELOC_VALUE_RIGHTSHIFT(r) (reloc_target_rightshift[(r)->r_type])
#define RELOC_TARGET_SIZE(r) (reloc_target_size[(r)->r_type])
#define RELOC_TARGET_BITPOS(r) 0
#define RELOC_TARGET_BITSIZE(r) (reloc_target_bitsize[(r)->r_type])
/* Note that these are very dependent on the order of the enums in
enum reloc_type (in a.out.h); if they change the following must be
/* Also note that the last few may be incorrect; I have no information */
static int reloc_target_rightshift
[] = {
0, 0, 0, 0, 0, 0, 2, 2, 10, 0, 0, 0, 0, 0, 0,
static int reloc_target_size
[] = {
0, 1, 2, 0, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
static int reloc_target_bitsize
[] = {
8, 16, 32, 8, 16, 32, 30, 22, 22, 22, 13, 10, 32, 32, 16,
#define MAX_ALIGNMENT (sizeof (double))
#define RELOC_ADDRESS(r) ((r)->r_address)
#define RELOC_EXTERN_P(r) ((r)->r_extern)
#define RELOC_TYPE(r) ((r)->r_symbolnum)
#define RELOC_SYMBOL(r) ((r)->r_symbolnum)
#define RELOC_MEMORY_SUB_P(r) 0
#define RELOC_MEMORY_ADD_P(r) 1
#define RELOC_PCREL_P(r) ((r)->r_pcrel)
#define RELOC_VALUE_RIGHTSHIFT(r) 0
#define RELOC_TARGET_SIZE(r) ((r)->r_length)
#define RELOC_TARGET_BITPOS(r) 0
#define RELOC_TARGET_BITSIZE(r) 32
#define MAX_ALIGNMENT (sizeof (int))
#define TEXT_START(x) N_TXTADDR(x)
/* Special global symbol types understood by GNU LD. */
/* The following type indicates the definition of a symbol as being
an indirect reference to another symbol. The other symbol
appears as an undefined reference, immediately following this symbol.
Indirection is asymmetrical. The other symbol's value will be used
to satisfy requests for the indirect symbol, but not vice versa.
If the other symbol does not have a definition, libraries will
be searched to find a definition.
So, for example, the following two lines placed in an assembler
input file would result in an object file which would direct gnu ld
to resolve all references to symbol "foo" as references to symbol
Note that (11 == (N_INDR | N_EXT)) and (1 == (N_UNDF | N_EXT)). */
/* The following symbols refer to set elements. These are expected
only in input to the loader; they should not appear in loader
output (unless relocatable output is requested). To be recognized
by the loader, the input symbols must have their N_EXT bit set.
All the N_SET[ATDB] symbols with the same name form one set. The
loader collects all of these elements at load time and outputs a
Space (an array of 32 bit words) is allocated for the set in the
data section, and the n_value field of each set element value is
stored into one word of the array.
The first word of the array is the length of the set (number of
elements). The last word of the vector is set to zero for possible
use by incremental loaders. The array is ordered by the linkage
order; the first symbols which the linker encounters will be first
In C syntax this looks like:
unsigned int vector[length];
unsigned int always_zero;
Before being placed into the array, each element is relocated
according to its type. This allows the loader to create an array
of pointers to objects automatically. N_SETA type symbols will not
The address of the set is made into an N_SETV symbol
whose name is the same as the name of the set.
This symbol acts like a N_DATA global symbol
in that it can satisfy undefined external references.
For the purposes of determining whether or not to load in a library
file, set element definitions are not considered "real
definitions"; they will not cause the loading of a library
If relocatable output is requested, none of this processing is
done. The symbols are simply relocated and passed through to the
So, for example, the following three lines of assembler code
(whether in one file or scattered between several different ones)
will produce a three element vector (total length is five words;
see above), referenced by the symbol "_xyzzy", which will have the
addresses of the routines _init1, _init2, and _init3.
*NOTE*: If symbolic addresses are used in the n_value field of the
defining .stabs, those symbols must be defined in the same file as
that containing the .stabs.
.stabs "_xyzzy",23,0,0,_init1
.stabs "_xyzzy",23,0,0,_init2
.stabs "_xyzzy",23,0,0,_init3
Note that (23 == (N_SETT | N_EXT)). */
#define N_SETA 0x14 /* Absolute set element symbol */
#endif /* This is input to LD, in a .o file. */
#define N_SETT 0x16 /* Text set element symbol */
#endif /* This is input to LD, in a .o file. */
#define N_SETD 0x18 /* Data set element symbol */
#endif /* This is input to LD, in a .o file. */
#define N_SETB 0x1A /* Bss set element symbol */
#endif /* This is input to LD, in a .o file. */
/* Macros dealing with the set element symbols defined in a.out.h */
#define SET_ELEMENT_P(x) ((x)>=N_SETA&&(x)<=(N_SETB|N_EXT))
#define TYPE_OF_SET_ELEMENT(x) ((x)-N_SETA+N_ABS)
#define N_SETV 0x1C /* Pointer to set vector in data area. */
#endif /* This is output from LD. */
/* If a this type of symbol is encountered, its name is a warning
message to print each time the symbol referenced by the next symbol
table entry is referenced.
This feature may be used to allow backwards compatibility with
certain functions (eg. gets) but to discourage programmers from
So if, for example, you wanted to have ld print a warning whenever
the function "gets" was used in their C program, you would add the
following to the assembler file in which gets is defined:
.stabs "Obsolete function \"gets\" referenced",30,0,0,0
These .stabs do not necessarily have to be in the same file as the
gets function, they simply must exist somewhere in the compilation. */
#define N_WARNING 0x1E /* Warning message to print if symbol
#endif /* This is input to ld */
/* Line number for the data section. This is to be used to describe
the source location of a variable declaration. */
#define N_DSLINE (N_SLINE+N_DATA-N_TEXT)
/* Line number for the bss section. This is to be used to describe
the source location of a variable declaration. */
#define N_BSLINE (N_SLINE+N_BSS-N_TEXT)
#endif /* not __GNU_STAB__ */
/* Global symbol data is recorded in these structures,
one for each global symbol.
They are found via hashing in 'symtab', which points to a vector of buckets.
Each bucket is a chain of these structures through the link field. */
/* Pointer to next symbol in this symbol's hash bucket. */
/* Name of this symbol. */
/* Value of this symbol as a global symbol. */
/* Chain of external 'nlist's in files for this symbol, both defs
/* Any warning message that might be associated with this symbol
from an N_WARNING symbol encountered. */
/* Nonzero means definitions of this symbol as common have been seen,
and the value here is the largest size specified by any of them. */
/* For relocatable_output, records the index of this global sym in the
symbol table to be written, with the first global sym given index 0.*/
/* Nonzero means a definition of this global symbol is known to exist.
Library members should not be loaded on its account. */
/* Nonzero means a reference to this global symbol has been seen
in a file that is surely being loaded.
A value higher than 1 is the n_type code for the symbol's
/* A count of the number of undefined references printed for a
specific symbol. If a symbol is unresolved at the end of
digest_symbols (and the loading run is supposed to produce
relocatable output) do_file_warnings keeps track of how many
unresolved reference error messages have been printed for
each symbol here. When the number hits MAX_UREFS_PRINTED,
unsigned char undef_refs
;
/* 1 means that this symbol has multiple definitions. 2 means
that it has multiple definitions, and some of them are set
elements, one of which has been printed out already. */
unsigned char multiply_defined
;
/* Nonzero means print a message at all refs or defs of this symbol */
extern char *cplus_demangle ();
/* Demangler function to use. */
char *(*demangler
)() = NULL
;
/* Number of buckets in symbol hash table */
/* The symbol hash table: a vector of TABSIZE pointers to struct glosym. */
/* Number of symbols in symbol hash table. */
int num_hash_tab_syms
= 0;
/* Count the number of nlist entries that are for local symbols.
This count and the three following counts
are incremented as as symbols are entered in the symbol table. */
/* Count number of nlist entries that are for local symbols
whose names don't start with L. */
int non_L_local_sym_count
;
/* Count the number of nlist entries for debugger info. */
/* Count the number of global symbols referenced and not defined. */
int undefined_global_sym_count
;
/* Count the number of global symbols multiply defined. */
/* Count the number of defined global symbols.
Each symbol is counted only once
regardless of how many different nlist entries refer to it,
since the output file will need only one nlist entry for it.
This count is computed by `digest_symbols';
it is undefined while symbols are being loaded. */
int defined_global_sym_count
;
/* Count the number of symbols defined through common declarations.
This count is kept in symdef_library, linear_library, and
enter_global_ref. It is incremented when the defined flag is set
in a symbol because of a common definition, and decremented when
the symbol is defined "for real" (ie. by something besides a common
int common_defined_global_count
;
/* Count the number of set element type symbols and the number of
separate vectors which these symbols will fit into. See the
GNU a.out.h for more info.
This count is computed by 'enter_file_symbols' */
/* Define a linked list of strings which define symbols which should
be treated as set elements even though they aren't. Any symbol
with a prefix matching one of these should be treated as a set
This is to make up for deficiencies in many assemblers which aren't
willing to pass any stabs through to the loader which they don't
struct string_list_element
{
struct string_list_element
*next
;
struct string_list_element
*set_element_prefixes
;
/* Count the number of definitions done indirectly (ie. done relative
to the value of some other symbol. */
int global_indirect_count
;
/* Count the number of warning symbols encountered. */
/* Total number of symbols to be written in the output file.
Computed by digest_symbols from the variables above. */
/* Nonzero means ptr to symbol entry for symbol to use as start addr.
symbol
*edata_symbol
; /* the symbol _edata */
symbol
*etext_symbol
; /* the symbol _etext */
symbol
*end_symbol
; /* the symbol _end */
/* Each input file, and each library member ("subfile") being loaded,
has a `file_entry' structure for it.
For files specified by command args, these are contained in the vector
which `file_table' points to.
For library members, they are dynamically allocated,
and chained through the `chain' field.
The chain is found in the `subfiles' field of the `file_entry'.
The `file_entry' objects for the members have `superfile' fields pointing
to the one for the library. */
/* Name to use for the symbol giving address of text start */
/* Usually the same as filename, but for a file spec'd with -l
this is the -l switch itself rather than the filename. */
/* Describe the layout of the contents of the file */
/* The file's a.out header. */
/* Offset in file of GDB symbol segment, or 0 if there is none. */
/* Describe data from the file loaded into core */
/* Symbol table of the file. */
/* Size in bytes of string table. */
/* Pointer to the string table.
The string table is not kept in core all the time,
but when it is in core, its address is here. */
/* Next two used only if `relocatable_output' or if needed for */
/* output of undefined reference line numbers. */
/* Text reloc info saved by `write_text' for `coptxtrel'. */
struct relocation_info
*textrel
;
/* Data reloc info saved by `write_data' for `copdatrel'. */
struct relocation_info
*datarel
;
/* Relation of this file's segments to the output file */
/* Start of this file's text seg in the output file core image. */
/* Start of this file's data seg in the output file core image. */
/* Start of this file's bss seg in the output file core image. */
/* Offset in bytes in the output file symbol table
of the first local symbol for this file. Set by `write_file_symbols'. */
/* For library members only */
/* For a library, points to chain of entries for the library members. */
struct file_entry
*subfiles
;
/* For a library member, offset of the member within the archive.
Zero for files that are not library members. */
/* Size of contents of this file, if library member. */
/* For library member, points to the library's own entry. */
struct file_entry
*superfile
;
/* For library member, points to next entry for next member. */
struct file_entry
*chain
;
/* 1 if file is a library. */
/* 1 if file's header has been read into this structure. */
/* 1 means search a set of directories for this file. */
/* 1 means this is base file of incremental load.
Do not load this file's text or data.
Also default text_start to after this file's bss. */
/* Vector of entries for input files specified by arguments.
These are all the input files except for members of specified libraries. */
struct file_entry
*file_table
;
/* Length of that vector. */
/* When loading the text and data, we can avoid doing a close
and another open between members of the same library.
These two variables remember the file that is currently open.
Both are zero if no file is open.
See `each_file' and `file_close'. */
struct file_entry
*input_file
;
/* The name of the file to write; "a.out" by default. */
/* Descriptor for writing that file with `mywrite'. */
/* Header for that file (filled in by `write_header'). */
struct coffheader coffheader
;
/* The following are computed by `digest_symbols'. */
int text_size
; /* total size of text of all input files. */
int data_size
; /* total size of data of all input files. */
int bss_size
; /* total size of bss of all input files. */
int text_reloc_size
; /* total size of text relocation of all input files. */
int data_reloc_size
; /* total size of data relocation of all input */
/* Specifications of start and length of the area reserved at the end
of the text segment for the set vectors. Computed in 'digest_symbols' */
/* Pointer for in core storage for the above vectors, before they are
unsigned long *set_vectors
;
/* Amount of cleared space to leave between the text and data segments. */
/* Amount of bss segment to include as part of the data segment. */
First, a longword containing the size of the 'symdef' data that follows.
Second, zero or more 'symdef' structures.
Third, a longword containing the length of symbol name strings.
Fourth, zero or more symbol name strings (each followed by a null). */
int symbol_name_string_index
;
int library_member_offset
;
/* Record most of the command options. */
/* Address we assume the text section will be loaded at.
We relocate symbols and text and data for this, but we do not
write any padding in the output file for it. */
/* Offset of default entry-pc within the text section. */
/* Address we decide the data section will be loaded at. */
/* `text-start' address is normally this much plus a page boundary.
This is not a user option; it is fixed for each system. */
int text_start_alignment
;
/* Nonzero if -T was specified in the command line.
This prevents text_start from being set later to default values. */
/* Nonzero if -Tdata was specified in the command line.
This prevents data_start from being set later to default values. */
int Tdata_flag_specified
;
/* Size to pad data section up to.
We simply increase the size of the data section, padding with zeros,
and reduce the size of the bss section to match. */
/* Magic number to use for the output file, set by switch. */
/* Nonzero means print names of input files as processed. */
/* Which symbols should be stripped (omitted from the output):
none, all, or debugger symbols. */
enum { STRIP_NONE
, STRIP_ALL
, STRIP_DEBUGGER
} strip_symbols
;
/* Which local symbols should be omitted:
none, all, or those starting with L.
This is irrelevant if STRIP_NONE. */
enum { DISCARD_NONE
, DISCARD_ALL
, DISCARD_L
} discard_locals
;
/* Do we want to pad the text to a page boundary? */
/* 1 => write load map. */
/* 1 => write relocation into output file so can re-input it later. */
/* 1 => assign space to common symbols even if `relocatable_output'. */
int force_common_definition
;
/* Standard directories to search for files specified by -l. */
char *standard_search_dirs
[] =
#ifdef STANDARD_SEARCH_DIRS
{"/lib", "/usr/lib", "/usr/local/lib"};
/* Actual vector of directories to search;
this contains those specified with -L plus the standard ones. */
/* Length of the vector `search_dirs'. */
/* Non zero means to create the output executable. */
/* Cleared by nonfatal errors. */
/* Force the executable to be output, even if there are non-fatal
/* Keep a list of any symbols referenced from the command line (so
that error messages for these guys can be generated). This list is
struct glosym
**cmdline_references
;
int malloc (), realloc ();
void list_undefined_symbols ();
void list_unresolved_references ();
void read_file_relocation ();
symbol
*getsym (), *getsym_soft ();
/* Added this to stop ld core-dumping on very large .o files. */
/* Get rid of any avoidable limit on stack size. */
/* Set the stack limit huge so that alloca does not fail. */
getrlimit (RLIMIT_STACK
, &rlim
);
rlim
.rlim_cur
= rlim
.rlim_max
;
setrlimit (RLIMIT_STACK
, &rlim
);
#endif /* RLIMIT_STACK */
page_size
= getpagesize ();
/* Clear the cumulative info on the output file. */
/* Initialize the data about options. */
strip_symbols
= STRIP_NONE
;
discard_locals
= DISCARD_NONE
;
force_common_definition
= 0;
Tdata_flag_specified
= 0;
set_element_prefixes
= 0;
/* Initialize the cumulative counts of symbols. */
non_L_local_sym_count
= 0;
undefined_global_sym_count
= 0;
global_indirect_count
= 0;
common_defined_global_count
= 0;
/* Keep a list of symbols referenced from the command line */
= (struct glosym
**) xmalloc (cl_refs_allocated
* sizeof(struct glosym
*));
/* Completely decode ARGV. */
decode_command (argc
, argv
);
/* Create the symbols `etext', `edata' and `end'. */
/* Determine whether to count the header as part of
the text size, and initialize the text size accordingly.
This depends on the kind of system and on the output format selected. */
N_SET_MAGIC (outheader
, magic
);
text_size
= sizeof (struct exec
);
if (relocatable_output
== 0 && file_table
[0].just_syms_flag
== 0)
/* set this flag now, since it will change the values of N_TXTOFF, etc */
N_SET_FLAGS (outheader
, N_FLAGS_COFF_ENCAPSULATE
);
text_size
+= sizeof (struct coffheader
);
text_size
-= N_TXTOFF (outheader
);
entry_offset
= text_size
;
if (!T_flag_specified
&& !relocatable_output
)
text_start
= TEXT_START (outheader
);
/* The text-start address is normally this far past a page boundary. */
text_start_alignment
= text_start
% page_size
;
/* Load symbols of all input files.
Also search all libraries and decide which library members to load. */
/* Compute where each file's sections go, and relocate symbols. */
/* Print error messages for any missing symbols, for any warning
symbols, and possibly multiple definitions */
/* Print a map, if requested. */
if (write_map
) print_symbols (stdout
);
/* Write the output file. */
if (make_executable
|| force_executable
)
/* Analyze a command line argument.
Return 0 if the argument is a filename.
Return 1 if the argument is a option complete in itself.
Return 2 if the argument is a option which uses an argument.
Thus, the value is the number of consecutive arguments
that are part of options. */
if (*arg
!= '-') return 0;
if (! strcmp (&arg
[2], "static"))
if (! strcmp (&arg
[2], "text"))
if (! strcmp (&arg
[2], "data"))
/* Process the command arguments,
setting up file_table with an entry for each input file,
and setting variables according to the options. */
decode_command (argc
, argv
)
register struct file_entry
*p
;
output_filename
= "a.out";
search_dirs
= (char **) xmalloc (sizeof (char *));
/* First compute number_of_files so we know how long to make file_table. */
/* Also process most options completely. */
for (i
= 1; i
< argc
; i
++)
register int code
= classify_arg (argv
[i
]);
fatal ("no argument following %s\n", argv
[i
]);
decode_option (argv
[i
], argv
[i
+1]);
if (argv
[i
][1] == 'l' || argv
[i
][1] == 'A')
fatal ("no input files", 0);
= (struct file_entry
*) xmalloc (number_of_files
* sizeof (struct file_entry
));
bzero (p
, number_of_files
* sizeof (struct file_entry
));
/* Now scan again and fill in file_table. */
/* All options except -A and -l are ignored here. */
for (i
= 1; i
< argc
; i
++)
register int code
= classify_arg (argv
[i
]);
fatal ("-A specified before an input file other than the first");
p
->local_sym_name
= string
;
if (cp
= rindex(string
, '/'))
cp
= concat (string
, "/lib", cp
);
p
->filename
= concat (cp
, ".a", "");
p
->filename
= concat ("lib", string
, ".a");
p
->local_sym_name
= concat ("-l", string
, "");
p
->local_sym_name
= argv
[i
];
/* Now check some option settings for consistency. */
if ((magic
== ZMAGIC
|| magic
== NMAGIC
)
&& (text_start
- text_start_alignment
) & (page_size
- 1))
fatal ("-T argument not multiple of page size, with sharable output", 0);
/* Append the standard search directories to the user-specified ones. */
int n
= sizeof standard_search_dirs
/ sizeof standard_search_dirs
[0];
= (char **) xrealloc (search_dirs
, n_search_dirs
* sizeof (char *));
bcopy (standard_search_dirs
, &search_dirs
[n_search_dirs
- n
],
for (ptr
= cmdline_references
;
ptr
< cmdline_references
+ cl_refs_allocated
&& *ptr
;
if (ptr
>= cmdline_references
+ cl_refs_allocated
- 1)
int diff
= ptr
- cmdline_references
;
cmdline_references
= (struct glosym
**)
xrealloc (cmdline_references
,
cl_refs_allocated
* sizeof (struct glosym
*));
ptr
= cmdline_references
+ diff
;
*ptr
= (struct glosym
*) 0;
set_element_prefixed_p (name
)
struct string_list_element
*p
;
for (p
= set_element_prefixes
; p
; p
= p
->next
)
for (i
= 0; p
->str
[i
] != '\0' && (p
->str
[i
] == name
[i
]); i
++)
/* Record an option and arrange to act on it later.
ARG should be the following command argument,
which may or may not be used by this option.
The `l' and `A' options are ignored here since they actually
register char *swt
, *arg
;
/* We get Bstatic from gcc on suns. */
if (! strcmp (swt
+ 1, "Bstatic"))
if (! strcmp (swt
+ 1, "Ttext"))
text_start
= parse (arg
, "%x", "invalid argument to -Ttext");
if (! strcmp (swt
+ 1, "Tdata"))
data_start
= parse (arg
, "%x", "invalid argument to -Tdata");
Tdata_flag_specified
= 1;
if (! strcmp (swt
+ 1, "noinhibit-exec"))
specified_data_size
= parse (arg
, "%x", "invalid argument to -D");
force_common_definition
= 1;
entry_symbol
= getsym (arg
);
if (!entry_symbol
->defined
&& !entry_symbol
->referenced
)
undefined_global_sym_count
++;
entry_symbol
->referenced
= 1;
add_cmdline_ref (entry_symbol
);
/* If linking with libg++, use the C++ demangler. */
if (arg
!= NULL
&& strcmp (arg
, "g++") == 0)
demangler
= cplus_demangle
;
= (char **) xrealloc (search_dirs
, n_search_dirs
* sizeof (char *));
search_dirs
[n_search_dirs
- 1] = arg
;
strip_symbols
= STRIP_DEBUGGER
;
strip_symbols
= STRIP_ALL
;
text_start
= parse (arg
, "%x", "invalid argument to -T");
register symbol
*sp
= getsym (arg
);
if (!sp
->defined
&& !sp
->referenced
)
undefined_global_sym_count
++;
struct string_list_element
*new
= (struct string_list_element
*)
xmalloc (sizeof (struct string_list_element
));
new->next
= set_element_prefixes
;
set_element_prefixes
= new;
discard_locals
= DISCARD_L
;
discard_locals
= DISCARD_ALL
;
register symbol
*sp
= getsym (&swt
[2]);
fatal ("invalid command option `%s'", swt
);
/** Convenient functions for operating on one or all files being */
/* Call FUNCTION on each input file entry.
Do not call for entries for libraries;
instead, call once for each library member that is being loaded.
FUNCTION receives two arguments: the entry, and ARG. */
each_file (function
, arg
)
register void (*function
)();
for (i
= 0; i
< number_of_files
; i
++)
register struct file_entry
*entry
= &file_table
[i
];
register struct file_entry
*subentry
= entry
->subfiles
;
for (; subentry
; subentry
= subentry
->chain
)
(*function
) (subentry
, arg
);
(*function
) (entry
, arg
);
/* Call FUNCTION on each input file entry until it returns a non-zero
value. Return this value.
Do not call for entries for libraries;
instead, call once for each library member that is being loaded.
FUNCTION receives two arguments: the entry, and ARG. It must be a
function returning unsigned long (though this can probably be fudged). */
check_each_file (function
, arg
)
register unsigned long (*function
)();
register unsigned long return_val
;
for (i
= 0; i
< number_of_files
; i
++)
register struct file_entry
*entry
= &file_table
[i
];
register struct file_entry
*subentry
= entry
->subfiles
;
for (; subentry
; subentry
= subentry
->chain
)
if (return_val
= (*function
) (subentry
, arg
))
if (return_val
= (*function
) (entry
, arg
))
/* Like `each_file' but ignore files that were just for symbol definitions. */
each_full_file (function
, arg
)
register void (*function
)();
for (i
= 0; i
< number_of_files
; i
++)
register struct file_entry
*entry
= &file_table
[i
];
if (entry
->just_syms_flag
)
register struct file_entry
*subentry
= entry
->subfiles
;
for (; subentry
; subentry
= subentry
->chain
)
(*function
) (subentry
, arg
);
(*function
) (entry
, arg
);
/* Close the input file that is now open. */
/* Open the input file specified by 'entry', and return a descriptor.
The open file is remembered; if the same file is opened twice in a row,
a new open is not actually done. */
register struct file_entry
*entry
;
return file_open (entry
->superfile
);
if (input_file
) file_close ();
if (entry
->search_dirs_flag
)
for (i
= 0; i
< n_search_dirs
; i
++)
= concat (search_dirs
[i
], "/", entry
->filename
);
desc
= open (string
, O_RDONLY
, 0);
entry
->filename
= string
;
entry
->search_dirs_flag
= 0;
desc
= open (entry
->filename
, O_RDONLY
, 0);
/* Print the filename of ENTRY on OUTFILE (a stdio stream),
prline_file_name (entry
, outfile
)
struct file_entry
*entry
;
print_file_name (entry
, outfile
);
/* Print the filename of ENTRY on OUTFILE (a stdio stream). */
print_file_name (entry
, outfile
)
struct file_entry
*entry
;
print_file_name (entry
->superfile
, outfile
);
fprintf (outfile
, "(%s)", entry
->filename
);
fprintf (outfile
, "%s", entry
->filename
);
/* Return the filename of entry as a string (malloc'd for the purpose) */
struct file_entry
*entry
;
supfile
= get_file_name (entry
->superfile
);
result
= (char *) xmalloc (strlen (supfile
)
+ strlen (entry
->filename
) + 3);
sprintf (result
, "%s(%s)", supfile
, entry
->filename
);
result
= (char *) xmalloc (strlen (entry
->filename
) + 1);
strcpy (result
, entry
->filename
);
/* Medium-level input routines for rel files. */
/* Read a file's header into the proper place in the file_entry.
DESC is the descriptor on which the file is open.
ENTRY is the file's entry. */
read_header (desc
, entry
)
register struct file_entry
*entry
;
struct exec
*loc
= (struct exec
*) &entry
->header
;
lseek (desc
, entry
->starting_offset
, 0);
if (entry
->just_syms_flag
)
lseek (desc
, sizeof(coffheader
), 1);
len
= read (desc
, loc
, sizeof (struct exec
));
if (len
!= sizeof (struct exec
))
fatal_with_file ("failure reading header of ", entry
);
fatal_with_file ("bad magic number in ", entry
);
entry
->header_read_flag
= 1;
/* Read the symbols of file ENTRY into core.
Assume it is already open, on descriptor DESC.
Also read the length of the string table, which follows the symbol table,
but don't read the contents of the string table. */
read_entry_symbols (desc
, entry
)
struct file_entry
*entry
;
if (!entry
->header_read_flag
)
read_header (desc
, entry
);
entry
->symbols
= (struct nlist
*) xmalloc (entry
->header
.a_syms
);
lseek (desc
, N_SYMOFF (entry
->header
) + entry
->starting_offset
, 0);
if (entry
->header
.a_syms
!= read (desc
, entry
->symbols
, entry
->header
.a_syms
))
fatal_with_file ("premature end of file in symbols of ", entry
);
lseek (desc
, N_STROFF (entry
->header
) + entry
->starting_offset
, 0);
if (sizeof str_size
!= read (desc
, &str_size
, sizeof str_size
))
fatal_with_file ("bad string table size in ", entry
);
entry
->string_size
= str_size
;
/* Read the string table of file ENTRY into core.
Assume it is already open, on descriptor DESC.
Also record whether a GDB symbol segment follows the string table. */
read_entry_strings (desc
, entry
)
struct file_entry
*entry
;
if (!entry
->header_read_flag
)
read_header (desc
, entry
);
lseek (desc
, N_STROFF (entry
->header
) + entry
->starting_offset
, 0);
if (entry
->string_size
!= read (desc
, entry
->strings
, entry
->string_size
))
fatal_with_file ("premature end of file in strings of ", entry
);
/* While we are here, see if the file has a symbol segment at the end.
For a separate file, just try reading some more.
For a library member, compare current pos against total size. */
if (entry
->total_size
== N_STROFF (entry
->header
) + entry
->string_size
)
buffer
= read (desc
, &buffer
, sizeof buffer
);
if (buffer
!= sizeof buffer
)
fatal_with_file ("premature end of file in GDB symbol segment of ", entry
);
/* Don't try to do anything with symsegs. */
/* eliminate warning of `statement not reached'. */
entry
->symseg_offset
= N_STROFF (entry
->header
) + entry
->string_size
;
/* Read in the symbols of all input files. */
void read_file_symbols (), read_entry_symbols (), read_entry_strings ();
void enter_file_symbols (), enter_global_ref (), search_library ();
if (trace_files
) fprintf (stderr
, "Loading symbols:\n\n");
for (i
= 0; i
< number_of_files
; i
++)
register struct file_entry
*entry
= &file_table
[i
];
read_file_symbols (entry
);
if (trace_files
) fprintf (stderr
, "\n");
/* If ENTRY is a rel file, read its symbol and string sections into core.
If it is a library, search it and load the appropriate members
(which means calling this function recursively on those members). */
read_file_symbols (entry
)
register struct file_entry
*entry
;
desc
= file_open (entry
);
if (entry
->just_syms_flag
)
lseek (desc
, sizeof(coffheader
),0);
len
= read (desc
, &hdr
, sizeof hdr
);
fatal_with_file ("failure reading header of ", entry
);
read_entry_symbols (desc
, entry
);
entry
->strings
= (char *) alloca (entry
->string_size
);
read_entry_strings (desc
, entry
);
enter_file_symbols (entry
);
if (SARMAG
!= read (desc
, armag
, SARMAG
) || strncmp (armag
, ARMAG
, SARMAG
))
fatal_with_file ("malformed input file (not rel or archive) ", entry
);
search_library (desc
, entry
);
/* Enter the external symbol defs and refs of ENTRY in the hash table. */
enter_file_symbols (entry
)
struct file_entry
*entry
;
*end
= entry
->symbols
+ entry
->header
.a_syms
/ sizeof (struct nlist
);
if (trace_files
) prline_file_name (entry
, stderr
);
for (p
= entry
->symbols
; p
< end
; p
++)
if (p
->n_type
== (N_SETV
| N_EXT
)) continue;
&& set_element_prefixed_p (p
->n_un
.n_strx
+ entry
->strings
))
p
->n_type
+= (N_SETA
- N_ABS
);
if (SET_ELEMENT_P (p
->n_type
))
enter_global_ref (p
, p
->n_un
.n_strx
+ entry
->strings
, entry
);
else if (p
->n_type
== N_WARNING
)
char *name
= p
->n_un
.n_strx
+ entry
->strings
;
/* Grab the next entry. */
if (p
->n_type
!= (N_UNDF
| N_EXT
))
fprintf (stderr
, "%s: Warning symbol found in %s without external reference following.\n",
progname
, entry
->filename
);
p
--; /* Process normally. */
char *sname
= p
->n_un
.n_strx
+ entry
->strings
;
/* Deal with the warning symbol. */
enter_global_ref (p
, p
->n_un
.n_strx
+ entry
->strings
, entry
);
sp
->warning
= (char *) xmalloc (strlen(name
) + 1);
strcpy (sp
->warning
, name
);
else if (p
->n_type
& N_EXT
)
enter_global_ref (p
, p
->n_un
.n_strx
+ entry
->strings
, entry
);
else if (p
->n_un
.n_strx
&& !(p
->n_type
& (N_STAB
| N_EXT
)))
if ((p
->n_un
.n_strx
+ entry
->strings
)[0] != LPREFIX
)
else debugger_sym_count
++;
/* Count one for the local symbol that we generate,
whose name is the file's name (usually) and whose address
is the start of the file's text. */
/* Enter one global symbol in the hash table.
NLIST_P points to the `struct nlist' read from the file
that describes the global symbol. NAME is the symbol's name.
ENTRY is the file entry for the file the symbol comes from.
The `struct nlist' is modified by placing it on a chain of
all such structs that refer to the same global symbol.
This chain starts in the `refs' field of the symbol table entry
and is chained through the `n_name'. */
enter_global_ref (nlist_p
, name
, entry
)
register struct nlist
*nlist_p
;
struct file_entry
*entry
;
register symbol
*sp
= getsym (name
);
register int type
= nlist_p
->n_type
;
int oldref
= sp
->referenced
;
int olddef
= sp
->defined
;
int com
= sp
->defined
&& sp
->max_common_size
;
nlist_p
->n_un
.n_name
= (char *) sp
->refs
;
if (type
!= (N_UNDF
| N_EXT
) || nlist_p
->n_value
)
if (!sp
->defined
|| sp
->defined
== (N_UNDF
| N_EXT
))
/* It used to be undefined and we're defining it. */
undefined_global_sym_count
--;
if (!olddef
&& type
== (N_UNDF
| N_EXT
) && nlist_p
->n_value
)
/* First definition and it's common. */
common_defined_global_count
++;
sp
->max_common_size
= nlist_p
->n_value
;
else if (com
&& type
!= (N_UNDF
| N_EXT
))
/* It used to be common and we're defining it as
common_defined_global_count
--;
else if (com
&& type
== (N_UNDF
| N_EXT
)
&& sp
->max_common_size
< nlist_p
->n_value
)
/* It used to be common and this is a new common entry to
which we need to pay attention. */
sp
->max_common_size
= nlist_p
->n_value
;
/* Are we defining it as a set element? */
if (SET_ELEMENT_P (type
) && (!olddef
|| com
))
else if (type
== (N_INDR
| N_EXT
))
/* Indirect symbols value should be modified to point
a symbol being equivalenced to. */
= (unsigned int) getsym ((nlist_p
+ 1)->n_un
.n_strx
if ((symbol
*) nlist_p
->n_value
== sp
)
/* Somebody redefined a symbol to be itself. */
fprintf (stderr
, "%s: Symbol %s indirected to itself.\n",
/* Rewrite this symbol as being a global text symbol
nlist_p
->n_type
= sp
->defined
= N_TEXT
| N_EXT
;
/* Don't make the output executable. */
undefined_global_sym_count
++;
if (entry
->superfile
&& type
== (N_UNDF
| N_EXT
) && name
[1] == '$')
/* This is an (ISI?) $-conditional; skip it */
fprintf (stderr
, "symbol %s is a $-conditional ignored in ", sp
->name
);
print_file_name (entry
, stderr
);
undefined_global_sym_count
++;
if (sp
== end_symbol
&& entry
->just_syms_flag
&& !T_flag_specified
)
text_start
= nlist_p
->n_value
;
reftype
= "defined as common";
else reftype
= "referenced";
reftype
= "defined as absolute";
reftype
= "defined in text section";
reftype
= "defined in data section";
reftype
= "defined in BSS section";
reftype
= "is a text set element";
reftype
= "is a data set element";
reftype
= "is a BSS set element";
reftype
= "is an absolute set element";
reftype
= "defined in data section as vector";
reftype
= (char *) alloca (23
+ strlen ((nlist_p
+ 1)->n_un
.n_strx
sprintf (reftype
, "defined equivalent to %s",
(nlist_p
+ 1)->n_un
.n_strx
+ entry
->strings
);
/* These conflict with cases above.
reftype
= "I don't know this type";
fprintf (stderr
, "symbol %s %s in ", sp
->name
, reftype
);
print_file_name (entry
, stderr
);
/* This return 0 if the given file entry's symbol table does *not*
contain the nlist point entry, and it returns the files entry
pointer (cast to unsigned long) if it does. */
contains_symbol (entry
, n_ptr
)
struct file_entry
*entry
;
register struct nlist
*n_ptr
;
if (n_ptr
>= entry
->symbols
&&
+ (entry
->header
.a_syms
/ sizeof (struct nlist
))))
return (unsigned long) entry
;
/* Searching libraries */
struct file_entry
*decode_library_subfile ();
void linear_library (), symdef_library ();
/* Search the library ENTRY, already open on descriptor DESC.
This means deciding which library members to load,
making a chain of `struct file_entry' for those members,
and entering their global symbols in the hash table. */
search_library (desc
, entry
)
struct file_entry
*entry
;
register struct file_entry
*subentry
;
if (!undefined_global_sym_count
) return;
/* Examine its first member, which starts SARMAG bytes in. */
subentry
= decode_library_subfile (desc
, entry
, SARMAG
, &member_length
);
name
= subentry
->filename
;
/* Search via __.SYMDEF if that exists, else linearly. */
if (!strcmp (name
, "__.SYMDEF"))
symdef_library (desc
, entry
, member_length
);
linear_library (desc
, entry
);
/* Construct and return a file_entry for a library member.
The library's file_entry is library_entry, and the library is open on DESC.
SUBFILE_OFFSET is the byte index in the library of this member's header.
We store the length of the member into *LENGTH_LOC. */
decode_library_subfile (desc
, library_entry
, subfile_offset
, length_loc
)
struct file_entry
*library_entry
;
register struct file_entry
*subentry
;
lseek (desc
, subfile_offset
, 0);
bytes_read
= read (desc
, &hdr1
, sizeof hdr1
);
return 0; /* end of archive */
if (sizeof hdr1
!= bytes_read
)
fatal_with_file ("malformed library archive ", library_entry
);
if (sscanf (hdr1
.ar_size
, "%d", &member_length
) != 1)
fatal_with_file ("malformatted header of archive member in ", library_entry
);
subentry
= (struct file_entry
*) xmalloc (sizeof (struct file_entry
));
bzero (subentry
, sizeof (struct file_entry
));
namelen
< sizeof hdr1
.ar_name
&& hdr1
.ar_name
[namelen
] != 0 && hdr1
.ar_name
[namelen
] != ' '
&& hdr1
.ar_name
[namelen
] != '/';
name
= (char *) xmalloc (namelen
+1);
strncpy (name
, hdr1
.ar_name
, namelen
);
subentry
->filename
= name
;
subentry
->local_sym_name
= name
;
subentry
->starting_offset
= subfile_offset
+ sizeof hdr1
;
subentry
->superfile
= library_entry
;
subentry
->library_flag
= 0;
subentry
->header_read_flag
= 0;
subentry
->just_syms_flag
= 0;
subentry
->total_size
= member_length
;
(*length_loc
) = member_length
;
/* Search a library that has a __.SYMDEF member.
DESC is a descriptor on which the library is open.
The file pointer is assumed to point at the __.SYMDEF data.
ENTRY is the library's file_entry.
MEMBER_LENGTH is the length of the __.SYMDEF data. */
symdef_library (desc
, entry
, member_length
)
struct file_entry
*entry
;
int *symdef_data
= (int *) xmalloc (member_length
);
register struct symdef
*symdef_base
;
struct file_entry
*prev
= 0;
bytes_read
= read (desc
, symdef_data
, member_length
);
if (bytes_read
!= member_length
)
fatal_with_file ("malformatted __.SYMDEF in ", entry
);
number_of_symdefs
= *symdef_data
/ sizeof (struct symdef
);
if (number_of_symdefs
< 0 ||
number_of_symdefs
* sizeof (struct symdef
) + 2 * sizeof (int) > member_length
)
fatal_with_file ("malformatted __.SYMDEF in ", entry
);
symdef_base
= (struct symdef
*) (symdef_data
+ 1);
length_of_strings
= *(int *) (symdef_base
+ number_of_symdefs
);
if (length_of_strings
< 0
|| number_of_symdefs
* sizeof (struct symdef
) + length_of_strings
+ 2 * sizeof (int) > member_length
)
fatal_with_file ("malformatted __.SYMDEF in ", entry
);
sym_name_base
= sizeof (int) + (char *) (symdef_base
+ number_of_symdefs
);
/* Check all the string indexes for validity. */
for (i
= 0; i
< number_of_symdefs
; i
++)
register int index
= symdef_base
[i
].symbol_name_string_index
;
if (index
< 0 || index
>= length_of_strings
|| (index
&& *(sym_name_base
+ index
- 1)))
fatal_with_file ("malformatted __.SYMDEF in ", entry
);
/* Search the symdef data for members to load.
Do this until one whole pass finds nothing to load. */
/* Scan all the symbols mentioned in the symdef for ones that we need.
Load the library members that contain such symbols. */
&& (undefined_global_sym_count
|| common_defined_global_count
));
if (symdef_base
[i
].symbol_name_string_index
>= 0)
sp
= getsym_soft (sym_name_base
+ symdef_base
[i
].symbol_name_string_index
);
/* If we find a symbol that appears to be needed, think carefully
about the archive member that the symbol is in. */
* Per Mike Karels' recommendation, we no longer load library
* files if the only reference(s) that would be satisfied are
* 'common' references. This prevents some problems with name
* pollution (e.g. a global common 'utime' linked to a function).
if (sp
&& sp
->referenced
&& !sp
->defined
)
register int offset
= symdef_base
[i
].library_member_offset
;
struct file_entry
*subentry
;
/* Don't think carefully about any archive member
more than once in a given pass. */
if (prev_offset
== offset
)
/* Read the symbol table of the archive member. */
subentry
= decode_library_subfile (desc
, entry
, offset
, &junk
);
fatal ("invalid offset for %s in symbol table of %s",
+ symdef_base
[i
].symbol_name_string_index
,
read_entry_symbols (desc
, subentry
);
subentry
->strings
= (char *) malloc (subentry
->string_size
);
read_entry_strings (desc
, subentry
);
/* Now scan the symbol table and decide whether to load. */
if (!subfile_wanted_p (subentry
))
free (subentry
->symbols
);
/* This member is needed; load it.
Since we are loading something on this pass,
we must make another pass through the symdef data. */
enter_file_symbols (subentry
);
else entry
->subfiles
= subentry
;
/* Clear out this member's symbols from the symdef data
so that following passes won't waste time on them. */
for (j
= 0; j
< number_of_symdefs
; j
++)
if (symdef_base
[j
].library_member_offset
== offset
)
symdef_base
[j
].symbol_name_string_index
= -1;
/* We'll read the strings again if we need them again. */
free (subentry
->strings
);
/* Search a library that has no __.SYMDEF.
ENTRY is the library's file_entry.
DESC is the descriptor it is open on. */
linear_library (desc
, entry
)
struct file_entry
*entry
;
register struct file_entry
*prev
= 0;
register int this_subfile_offset
= SARMAG
;
while (undefined_global_sym_count
|| common_defined_global_count
)
register struct file_entry
*subentry
;
subentry
= decode_library_subfile (desc
, entry
, this_subfile_offset
,
read_entry_symbols (desc
, subentry
);
subentry
->strings
= (char *) alloca (subentry
->string_size
);
read_entry_strings (desc
, subentry
);
if (!subfile_wanted_p (subentry
))
free (subentry
->symbols
);
enter_file_symbols (subentry
);
else entry
->subfiles
= subentry
;
subentry
->strings
= 0; /* Since space will dissapear on return */
this_subfile_offset
+= member_length
+ sizeof (struct ar_hdr
);
if (this_subfile_offset
& 1) this_subfile_offset
++;
/* ENTRY is an entry for a library member.
Its symbols have been read into core, but not entered.
Return nonzero if we ought to load this member. */
struct file_entry
*entry
;
register struct nlist
*p
;
register struct nlist
*end
= entry
->symbols
+ entry
->header
.a_syms
/ sizeof (struct nlist
);
register int dollar_cond
= 0;
for (p
= entry
->symbols
; p
< end
; p
++)
register int type
= p
->n_type
;
register char *name
= p
->n_un
.n_strx
+ entry
->strings
;
/* If the symbol has an interesting definition, we could
&& (type
!= (N_UNDF
| N_EXT
) || p
->n_value
&& !set_element_prefixed_p (name
))
register symbol
*sp
= getsym_soft (name
);
sp
= getsym_soft (&name
[2]);
print_file_name (entry
, stdout
);
fprintf (stdout
, " needed due to $-conditional %s\n", name
);
/* If this symbol has not been hashed, we can't be looking for it. */
* We don't load a file if it merely satisfies a common reference
* (see explanation above in symdef_library()).
if (sp
->referenced
&& !sp
->defined
)
/* This is a symbol we are looking for. It is either
not yet defined or defined as a common. */
if (dollar_cond
) continue;
if (type
== (N_UNDF
| N_EXT
))
/* Symbol being defined as common.
Remember this, but don't load subfile just for this. */
/* If it didn't used to be common, up the count of
if (!sp
->max_common_size
)
common_defined_global_count
++;
if (sp
->max_common_size
< p
->n_value
)
sp
->max_common_size
= p
->n_value
;
undefined_global_sym_count
--;
print_file_name (entry
, stdout
);
fprintf (stdout
, " needed due to %s\n", sp
->name
);
void consider_file_section_lengths (), relocate_file_addresses ();
/* Having entered all the global symbols and found the sizes of sections
of all files to be linked, make all appropriate deductions from this data.
We propagate global symbol values from definitions to references.
We compute the layout of the output file and where each input file's
fprintf (stderr
, "Digesting symbol information:\n\n");
/* Compute total size of sections */
each_file (consider_file_section_lengths
, 0);
/* If necessary, pad text section to full page in the file.
Include the padding in the text segment size. */
int text_end
= text_size
+ N_TXTOFF (outheader
);
text_pad
= ((text_end
+ page_size
- 1) & (- page_size
)) - text_end
;
int text_end
= text_size
;
text_pad
= ((text_end
+ page_size
- 1) & (- page_size
)) - text_end
;
/* SunOS 4.1 N_TXTADDR depends on the value of outheader.a_entry. */
outheader
.a_entry
= N_PAGSIZ (outheader
);
outheader
.a_text
= text_size
;
outheader
.a_text
+= N_ADDRADJ (outheader
);
/* Make the data segment address start in memory on a suitable boundary. */
if (! Tdata_flag_specified
)
data_start
= N_DATADDR (outheader
) + text_start
- TEXT_START (outheader
);
/* Set up the set element vector */
/* The set sector size is the number of set elements + a word
for each symbol for the length word at the beginning of the
vector, plus a word for each symbol for a zero at the end of
the vector (for incremental linking). */
= (2 * set_symbol_count
+ set_vector_count
) * sizeof (unsigned long);
set_sect_start
= data_start
+ data_size
;
data_size
+= set_sect_size
;
set_vectors
= (unsigned long *) xmalloc (set_sect_size
);
/* Compute start addresses of each file's sections and symbols. */
each_full_file (relocate_file_addresses
, 0);
/* Now, for each symbol, verify that it is defined globally at most once.
Put the global value into the symbol entry.
Common symbols are allocated here, in the BSS section.
Each defined symbol is given a '->defined' field
which is the correct N_ code for its definition,
except in the case of common symbols with -r.
Then make all the references point at the symbol entry
instead of being chained together. */
defined_global_sym_count
= 0;
for (i
= 0; i
< TABSIZE
; i
++)
for (sp
= symtab
[i
]; sp
; sp
= sp
->link
)
register struct nlist
*p
, *next
;
int defs
= 0, com
= sp
->max_common_size
;
struct nlist
*first_definition
;
for (p
= sp
->refs
; p
; p
= next
)
register int type
= p
->n_type
;
if (SET_ELEMENT_P (type
))
fatal ("internal: global ref to set element with -r");
sp
->value
= set_sect_start
+ setv_fill_count
++ * sizeof (unsigned long);
sp
->defined
= N_SETV
| N_EXT
;
else if ((sp
->defined
& ~N_EXT
) != N_SETV
)
sp
->multiply_defined
= 1;
set_vectors
[setv_fill_count
++] = p
->n_value
;
else if ((type
& N_EXT
) && type
!= (N_UNDF
| N_EXT
))
/* non-common definition */
if (defs
++ && sp
->value
!= p
->n_value
)
sp
->multiply_defined
= 1;
next
= (struct nlist
*) p
->n_un
.n_name
;
p
->n_un
.n_name
= (char *) sp
;
/* Allocate as common if defined as common and not defined for real */
if (!relocatable_output
|| force_common_definition
)
int align
= sizeof (int);
/* Round up to nearest sizeof (int). I don't know
whether this is necessary or not (given that
alignment is taken care of later), but it's
traditional, so I'll leave it in. Note that if
this size alignment is ever removed, ALIGN above
will have to be initialized to 1 instead of
com
= (com
+ sizeof (int) - 1) & (- sizeof (int));
align
= align
> MAX_ALIGNMENT
? MAX_ALIGNMENT
: align
;
bss_size
= ((((bss_size
+ data_size
+ data_start
)
+ (align
- 1)) & (- align
))
- data_size
- data_start
);
sp
->value
= data_start
+ data_size
+ bss_size
;
sp
->defined
= N_BSS
| N_EXT
;
printf ("Allocating common %s: %x at %x\n",
sp
->name
, com
, sp
->value
);
undefined_global_sym_count
++;
/* Set length word at front of vector and zero byte at end.
Reverse the vector itself to put it in file order. */
if ((sp
->defined
& ~N_EXT
) == N_SETV
)
unsigned long length_word_index
= (sp
->value
- set_sect_start
) / sizeof (unsigned long);
set_vectors
[length_word_index
]
= setv_fill_count
- 1 - length_word_index
;
/* Reverse the vector. */
i
< (setv_fill_count
- length_word_index
- 1) / 2 + 1;
tmp
= set_vectors
[length_word_index
+ i
];
set_vectors
[length_word_index
+ i
]
= set_vectors
[setv_fill_count
- i
];
set_vectors
[setv_fill_count
- i
] = tmp
;
set_vectors
[setv_fill_count
++] = 0;
defined_global_sym_count
++;
if (end_symbol
) /* These are null if -r. */
etext_symbol
->value
= text_size
+ text_start
;
edata_symbol
->value
= data_start
+ data_size
;
end_symbol
->value
= data_start
+ data_size
+ bss_size
;
/* Figure the data_pad now, so that it overlaps with the bss addresses. */
if (specified_data_size
&& specified_data_size
> data_size
)
data_pad
= specified_data_size
- data_size
;
data_pad
= ((data_pad
+ data_size
+ page_size
- 1) & (- page_size
))
if (bss_size
< 0) bss_size
= 0;
/* Accumulate the section sizes of input file ENTRY
into the section sizes of the output file. */
consider_file_section_lengths (entry
)
register struct file_entry
*entry
;
if (entry
->just_syms_flag
)
entry
->text_start_address
= text_size
;
/* If there were any vectors, we need to chop them off */
text_size
+= entry
->header
.a_text
;
entry
->data_start_address
= data_size
;
data_size
+= entry
->header
.a_data
;
entry
->bss_start_address
= bss_size
;
bss_size
+= entry
->header
.a_bss
;
text_reloc_size
+= entry
->header
.a_trsize
;
data_reloc_size
+= entry
->header
.a_drsize
;
/* Determine where the sections of ENTRY go into the output file,
whose total section sizes are already known.
Also relocate the addresses of the file's local and debugger symbols. */
relocate_file_addresses (entry
)
register struct file_entry
*entry
;
entry
->text_start_address
+= text_start
;
/* Note that `data_start' and `data_size' have not yet been
adjusted for `data_pad'. If they had been, we would get the wrong
entry
->data_start_address
+= data_start
;
entry
->bss_start_address
+= data_start
+ data_size
;
register struct nlist
*p
;
register struct nlist
*end
= entry
->symbols
+ entry
->header
.a_syms
/ sizeof (struct nlist
);
for (p
= entry
->symbols
; p
< end
; p
++)
/* If this belongs to a section, update it by the section's start address */
register int type
= p
->n_type
& N_TYPE
;
p
->n_value
+= entry
->text_start_address
;
/* A symbol whose value is in the data section
is present in the input file as if the data section
started at an address equal to the length of the file's text. */
p
->n_value
+= entry
->data_start_address
- entry
->header
.a_text
;
/* likewise for symbols with value in BSS. */
p
->n_value
+= entry
->bss_start_address
- entry
->header
.a_text
- entry
->header
.a_data
;
void describe_file_sections (), list_file_locals ();
/* Print a complete or partial map of the output file. */
fprintf (outfile
, "\nFiles:\n\n");
each_file (describe_file_sections
, outfile
);
fprintf (outfile
, "\nGlobal symbols:\n\n");
for (i
= 0; i
< TABSIZE
; i
++)
for (sp
= symtab
[i
]; sp
; sp
= sp
->link
)
fprintf (outfile
, " %s: common, length 0x%x\n", sp
->name
, sp
->max_common_size
);
fprintf (outfile
, " %s: 0x%x\n", sp
->name
, sp
->value
);
fprintf (outfile
, " %s: undefined\n", sp
->name
);
each_file (list_file_locals
, outfile
);
describe_file_sections (entry
, outfile
)
struct file_entry
*entry
;
print_file_name (entry
, outfile
);
if (entry
->just_syms_flag
)
fprintf (outfile
, " symbols only\n", 0);
fprintf (outfile
, " text %x(%x), data %x(%x), bss %x(%x) hex\n",
entry
->text_start_address
, entry
->header
.a_text
,
entry
->data_start_address
, entry
->header
.a_data
,
entry
->bss_start_address
, entry
->header
.a_bss
);
list_file_locals (entry
, outfile
)
struct file_entry
*entry
;
*end
= entry
->symbols
+ entry
->header
.a_syms
/ sizeof (struct nlist
);
entry
->strings
= (char *) alloca (entry
->string_size
);
read_entry_strings (file_open (entry
), entry
);
fprintf (outfile
, "\nLocal symbols of ");
print_file_name (entry
, outfile
);
fprintf (outfile
, ":\n\n");
for (p
= entry
->symbols
; p
< end
; p
++)
/* If this is a definition,
update it if necessary by this file's start address. */
if (!(p
->n_type
& (N_STAB
| N_EXT
)))
fprintf (outfile
, " %s: 0x%x\n",
entry
->strings
+ p
->n_un
.n_strx
, p
->n_value
);
entry
->strings
= 0; /* All done with them. */
/* Static vars for do_warnings and subroutines of it */
int list_unresolved_refs
; /* List unresolved refs */
int list_warning_symbols
; /* List warning syms */
int list_multiple_defs
; /* List multiple definitions */
* Structure for communication between do_file_warnings and it's
* helper routines. Will in practice be an array of three of these:
* 0) Current line, 1) Next line, 2) Source file info.
* Helper routines for do_file_warnings.
/* Return an integer less than, equal to, or greater than 0 as per the
relation between the two relocation entries. Used by qsort. */
relocation_entries_relation (rel1
, rel2
)
struct relocation_info
*rel1
, *rel2
;
return RELOC_ADDRESS(rel1
) - RELOC_ADDRESS(rel2
);
/* Moves to the next debugging symbol in the file. USE_DATA_SYMBOLS
determines the type of the debugging symbol to look for (DSLINE or
SLINE). STATE_POINTER keeps track of the old and new locatiosn in
the file. It assumes that state_pointer[1] is valid; ie
that it.sym points into some entry in the symbol table. If
state_pointer[1].sym == 0, this routine should not be called. */
next_debug_entry (use_data_symbols
, state_pointer
)
register int use_data_symbols
;
/* Next must be passed by reference! */
struct line_debug_entry state_pointer
[3];
register struct line_debug_entry
*current
= state_pointer
,
*next
= state_pointer
+ 1,
/* Used to store source file */
*source
= state_pointer
+ 2;
struct file_entry
*entry
= (struct file_entry
*) source
->sym
;
current
->sym
= next
->sym
;
current
->line
= next
->line
;
current
->filename
= next
->filename
;
while (++(next
->sym
) < (entry
->symbols
+ entry
->header
.a_syms
/sizeof (struct nlist
)))
/* n_type is a char, and N_SOL, N_EINCL and N_BINCL are > 0x80, so
* may look negative...therefore, must mask to low bits
switch (next
->sym
->n_type
& 0xff)
if (use_data_symbols
) continue;
next
->line
= next
->sym
->n_desc
;
if (!use_data_symbols
) continue;
next
->line
= next
->sym
->n_desc
;
next
->filename
= source
->filename
;
source
->filename
= next
->sym
->n_un
.n_strx
+ entry
->strings
;
= next
->sym
->n_un
.n_strx
+ entry
->strings
;
next
->sym
= (struct nlist
*) 0;
/* Create a structure to save the state of a scan through the debug
symbols. USE_DATA_SYMBOLS is set if we should be scanning for
DSLINE's instead of SLINE's. entry is the file entry which points
at the symbols to use. */
struct line_debug_entry
*
init_debug_scan (use_data_symbols
, entry
)
struct file_entry
*entry
;
= (struct line_debug_entry
*)
xmalloc (3 * sizeof (struct line_debug_entry
));
register struct line_debug_entry
*current
= state_pointer
,
*next
= state_pointer
+ 1,
*source
= state_pointer
+ 2; /* Used to store source file */
for (tmp
= entry
->symbols
;
+ entry
->header
.a_syms
/sizeof (struct nlist
));
if (tmp
->n_type
== (int) N_SO
)
if (tmp
>= (entry
->symbols
+ entry
->header
.a_syms
/sizeof (struct nlist
)))
/* I believe this translates to "We lose" */
current
->filename
= next
->filename
= entry
->filename
;
current
->line
= next
->line
= -1;
current
->sym
= next
->sym
= (struct nlist
*) 0;
next
->line
= source
->line
= 0;
next
->filename
= source
->filename
= (tmp
->n_un
.n_strx
+ entry
->strings
);
source
->sym
= (struct nlist
*) entry
;
next_debug_entry (use_data_symbols
, state_pointer
); /* To setup next */
if (!next
->sym
) /* No line numbers for this section; */
/* setup output results as appropriate */
current
->filename
= source
->filename
= entry
->filename
;
current
->line
= -1; /* Don't print lineno */
current
->filename
= source
->filename
;
next_debug_entry (use_data_symbols
, state_pointer
); /* To setup current */
/* Takes an ADDRESS (in either text or data space) and a STATE_POINTER
which describes the current location in the implied scan through
the debug symbols within the file which ADDRESS is within, and
returns the source line number which corresponds to ADDRESS. */
address_to_line (address
, state_pointer
)
/* Next must be passed by reference! */
struct line_debug_entry state_pointer
[3];
*current
= state_pointer
,
*next
= state_pointer
+ 1;
struct line_debug_entry
*tmp_pointer
;
use_data_symbols
= (next
->sym
->n_type
& N_TYPE
) == N_DATA
;
/* Go back to the beginning if we've already passed it. */
if (current
->sym
->n_value
> address
)
tmp_pointer
= init_debug_scan (use_data_symbols
,
((state_pointer
+ 2)->sym
));
state_pointer
[0] = tmp_pointer
[0];
state_pointer
[1] = tmp_pointer
[1];
state_pointer
[2] = tmp_pointer
[2];
/* If we're still in a bad way, return -1, meaning invalid line. */
if (current
->sym
->n_value
> address
)
&& next
->sym
->n_value
<= address
&& next_debug_entry (use_data_symbols
, state_pointer
))
/* Macros for manipulating bitvectors. */
#define BIT_SET_P(bv, index) ((bv)[(index) >> 3] & 1 << ((index) & 0x7))
#define SET_BIT(bv, index) ((bv)[(index) >> 3] |= 1 << ((index) & 0x7))
/* This routine will scan through the relocation data of file ENTRY,
printing out references to undefined symbols and references to
symbols defined in files with N_WARNING symbols. If DATA_SEGMENT
is non-zero, it will scan the data relocation segment (and use
N_DSLINE symbols to track line number); otherwise it will scan the
text relocation segment. Warnings will be printed on the output
stream OUTFILE. Eventually, every nlist symbol mapped through will
be marked in the NLIST_BITVECTOR, so we don't repeat ourselves when
we scan the nlists themselves. */
do_relocation_warnings (entry
, data_segment
, outfile
, nlist_bitvector
)
struct file_entry
*entry
;
unsigned char *nlist_bitvector
;
*reloc_start
= data_segment
? entry
->datarel
: entry
->textrel
,
= ((data_segment
? entry
->header
.a_drsize
: entry
->header
.a_trsize
)
/ sizeof (struct relocation_info
));
= (data_segment
? entry
->data_start_address
: entry
->text_start_address
);
struct nlist
*start_of_syms
= entry
->symbols
;
struct line_debug_entry
*state_pointer
= init_debug_scan (data_segment
!= 0, entry
);
register struct line_debug_entry
*current
= state_pointer
;
/* Assigned to generally static values; should not be written into. */
/* Assigned to alloca'd values cand copied into; should be freed
int invalidate_line_number
;
/* We need to sort the relocation info here. Sheesh, so much effort
for one lousy error optimization. */
qsort (reloc_start
, reloc_size
, sizeof (struct relocation_info
),
relocation_entries_relation
);
for (reloc
= reloc_start
;
reloc
< (reloc_start
+ reloc_size
);
register struct nlist
*s
;
/* If the relocation isn't resolved through a symbol, continue */
if (!RELOC_EXTERN_P(reloc
))
s
= &(entry
->symbols
[RELOC_SYMBOL(reloc
)]);
/* Local symbols shouldn't ever be used by relocation info, so
This is, of course, wrong. References to local BSS symbols can be
the targets of relocation info, and they can (must) be
resolved through symbols. However, these must be defined properly,
(the assembler would have caught it otherwise), so we can
if (!(s
->n_type
& N_EXT
))
g
= (symbol
*) s
->n_un
.n_name
;
if (!g
->defined
&& list_unresolved_refs
) /* Reference */
/* Mark as being noted by relocation warning pass. */
SET_BIT (nlist_bitvector
, s
- start_of_syms
);
if (g
->undef_refs
>= MAX_UREFS_PRINTED
) /* Listed too many */
/* Undefined symbol which we should mention */
if (++(g
->undef_refs
) == MAX_UREFS_PRINTED
)
errfmt
= "More undefined symbol %s refs follow";
invalidate_line_number
= 1;
errfmt
= "Undefined symbol %s referenced from %s segment";
invalidate_line_number
= 0;
/* Potential symbol warning here */
if (!g
->warning
) continue;
/* Mark as being noted by relocation warning pass. */
SET_BIT (nlist_bitvector
, s
- start_of_syms
);
invalidate_line_number
= 0;
/* If errfmt == 0, errmsg has already been defined. */
if (demangler
== NULL
|| (nm
= (*demangler
)(g
->name
)) == NULL
)
errmsg
= (char *) xmalloc (strlen (errfmt
) + strlen (nm
) + 1);
sprintf (errmsg
, errfmt
, nm
, data_segment
? "data" : "text");
address_to_line (RELOC_ADDRESS (reloc
) + start_of_segment
,
fprintf (outfile
, "%s:%d: %s\n", current
->filename
,
invalidate_line_number
? 0 : current
->line
, errmsg
);
fprintf (outfile
, "%s: %s\n", current
->filename
, errmsg
);
/* Print on OUTFILE a list of all warnings generated by references
and/or definitions in the file ENTRY. List source file and line
number if possible, just the .o file if not. */
do_file_warnings (entry
, outfile
)
struct file_entry
*entry
;
int number_of_syms
= entry
->header
.a_syms
/ sizeof (struct nlist
);
unsigned char *nlist_bitvector
= (unsigned char *) alloca ((number_of_syms
>> 3) + 1);
struct line_debug_entry
*text_scan
, *data_scan
;
char *errfmt
, *file_name
;
int dont_allow_symbol_name
;
bzero (nlist_bitvector
, (number_of_syms
>> 3) + 1);
/* Read in the files strings if they aren't available */
entry
->strings
= (char *) alloca (entry
->string_size
);
desc
= file_open (entry
);
read_entry_strings (desc
, entry
);
read_file_relocation (entry
);
/* Do text warnings based on a scan through the relocation info. */
do_relocation_warnings (entry
, 0, outfile
, nlist_bitvector
);
/* Do data warnings based on a scan through the relocation info. */
do_relocation_warnings (entry
, 1, outfile
, nlist_bitvector
);
/* Scan through all of the nlist entries in this file and pick up
anything that the scan through the relocation stuff didn't. */
text_scan
= init_debug_scan (0, entry
);
data_scan
= init_debug_scan (1, entry
);
for (i
= 0; i
< number_of_syms
; i
++)
if (!(s
->n_type
& N_EXT
))
g
= (symbol
*) s
->n_un
.n_name
;
dont_allow_symbol_name
= 0;
if (list_multiple_defs
&& g
->multiply_defined
)
errfmt
= "Definition of symbol %s (multiply defined)";
line_number
= address_to_line (s
->n_value
, text_scan
);
file_name
= text_scan
[0].filename
;
line_number
= address_to_line (s
->n_value
, data_scan
);
file_name
= data_scan
[0].filename
;
if (g
->multiply_defined
== 2)
errfmt
= "First set element definition of symbol %s (multiply defined)";
continue; /* Don't print out multiple defs
else if (BIT_SET_P (nlist_bitvector
, i
))
else if (list_unresolved_refs
&& !g
->defined
)
if (g
->undef_refs
>= MAX_UREFS_PRINTED
)
if (++(g
->undef_refs
) == MAX_UREFS_PRINTED
)
errfmt
= "More undefined \"%s\" refs follow";
errfmt
= "Undefined symbol \"%s\" referenced";
/* There are two cases in which we don't want to
do this. The first is if this is a definition instead of
a reference. The second is if it's the reference used by
the warning stabs itself. */
if (s
->n_type
!= (N_EXT
| N_UNDF
)
|| (i
&& (s
-1)->n_type
== N_WARNING
))
dont_allow_symbol_name
= 1;
fprintf (outfile
, "%s: ", entry
->filename
);
fprintf (outfile
, "%s:%d: ", file_name
, line_number
);
if (dont_allow_symbol_name
)
fprintf (outfile
, "%s", errfmt
);
if (demangler
!= NULL
&& (nm
= (*demangler
)(g
->name
)) != NULL
)
fprintf (outfile
, errfmt
, nm
);
fprintf (outfile
, errfmt
, g
->name
);
entry
->strings
= 0; /* Since it will dissapear anyway. */
list_unresolved_refs
= !relocatable_output
&& undefined_global_sym_count
;
list_warning_symbols
= warning_count
;
list_multiple_defs
= multiple_def_count
!= 0;
if (!(list_unresolved_refs
||
/* No need to run this routine */
each_file (do_file_warnings
, outfile
);
if (list_unresolved_refs
|| list_multiple_defs
)
/* Write the output file */
(void) unlink (output_filename
);
outdesc
= open (output_filename
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0666);
if (outdesc
< 0) perror_name (output_filename
);
if (fstat (outdesc
, &statbuf
) < 0)
perror_name (output_filename
);
(void) fchflags(outdesc
, statbuf
.st_flags
| UF_NODUMP
);
filemode
= statbuf
.st_mode
;
(void) fchmod (outdesc
, filemode
& ~0111);
/* Output the a.out header. */
/* Output the text and data segments, relocating as we go. */
/* Output the merged relocation info, if requested with `-r'. */
/* Output the symbol table (both globals and locals). */
/* Copy any GDB symbol segments from input files. */
if (fchmod (outdesc
, filemode
| 0111) == -1)
perror_name (output_filename
);
void modify_location (), perform_relocation (), copy_text (), copy_data ();
N_SET_MAGIC (outheader
, magic
);
outheader
.a_text
= text_size
;
outheader
.a_text
+= N_ADDRADJ (outheader
);
entry_symbol
= getsym("start");
outheader
.a_data
= data_size
;
outheader
.a_bss
= bss_size
;
outheader
.a_entry
= (entry_symbol
? entry_symbol
->value
: text_start
+ entry_offset
);
/* We are encapsulating BSD format within COFF format. */
struct coffscn
*tp
, *dp
, *bp
;
tp
= &coffheader
.scns
[0];
dp
= &coffheader
.scns
[1];
bp
= &coffheader
.scns
[2];
strcpy (tp
->s_name
, ".text");
tp
->s_paddr
= text_start
;
tp
->s_vaddr
= text_start
;
tp
->s_scnptr
= sizeof (struct coffheader
) + sizeof (struct exec
);
strcpy (dp
->s_name
, ".data");
dp
->s_paddr
= data_start
;
dp
->s_vaddr
= data_start
;
dp
->s_scnptr
= tp
->s_scnptr
+ tp
->s_size
;
strcpy (bp
->s_name
, ".bss");
bp
->s_paddr
= dp
->s_vaddr
+ dp
->s_size
;
bp
->s_vaddr
= bp
->s_paddr
;
coffheader
.f_magic
= COFF_MAGIC
;
/* store an unlikely time so programs can
* tell that there is a bsd header
coffheader
.f_opthdr
= 28;
coffheader
.f_flags
= 0x103;
coffheader
.magic
= ZMAGIC
;
coffheader
.tsize
= tp
->s_size
;
coffheader
.dsize
= dp
->s_size
;
coffheader
.bsize
= bp
->s_size
;
coffheader
.entry
= outheader
.a_entry
;
coffheader
.text_start
= tp
->s_vaddr
;
coffheader
.data_start
= dp
->s_vaddr
;
if (strip_symbols
== STRIP_ALL
)
nsyms
= (defined_global_sym_count
+ undefined_global_sym_count
);
if (discard_locals
== DISCARD_L
)
nsyms
+= non_L_local_sym_count
;
else if (discard_locals
== DISCARD_NONE
)
nsyms
+= local_sym_count
;
/* One extra for following reference on indirects */
nsyms
+= set_symbol_count
+ global_indirect_count
;
if (strip_symbols
== STRIP_NONE
)
nsyms
+= debugger_sym_count
;
outheader
.a_syms
= nsyms
* sizeof (struct nlist
);
outheader
.a_trsize
= text_reloc_size
;
outheader
.a_drsize
= data_reloc_size
;
mywrite (&coffheader
, sizeof coffheader
, 1, outdesc
);
mywrite (&outheader
, sizeof (struct exec
), 1, outdesc
);
/* Output whatever padding is required in the executable file
between the header and the start of the text. */
padfile (N_TXTOFF (outheader
) - sizeof outheader
, outdesc
);
/* Relocate the text segment of each input file
and write to the output file. */
fprintf (stderr
, "Copying and relocating text:\n\n");
each_full_file (copy_text
, 0);
padfile (text_pad
, outdesc
);
struct file_entry
*entry
;
return entry
->starting_offset
+ N_TXTOFF (entry
->header
);
/* Read in all of the relocation information */
each_full_file (read_file_relocation
, 0);
/* Read in the relocation sections of ENTRY if necessary */
read_file_relocation (entry
)
struct file_entry
*entry
;
register struct relocation_info
*reloc
;
reloc
= (struct relocation_info
*) xmalloc (entry
->header
.a_trsize
);
desc
= file_open (entry
);
text_offset (entry
) + entry
->header
.a_text
+ entry
->header
.a_data
,
if (entry
->header
.a_trsize
!= (read_return
= read (desc
, reloc
, entry
->header
.a_trsize
)))
fprintf (stderr
, "Return from read: %d\n", read_return
);
fatal_with_file ("premature eof in text relocation of ", entry
);
reloc
= (struct relocation_info
*) xmalloc (entry
->header
.a_drsize
);
if (desc
== -1) desc
= file_open (entry
);
text_offset (entry
) + entry
->header
.a_text
+ entry
->header
.a_data
+ entry
->header
.a_trsize
,
if (entry
->header
.a_drsize
!= read (desc
, reloc
, entry
->header
.a_drsize
))
fatal_with_file ("premature eof in data relocation of ", entry
);
/* Read the text segment contents of ENTRY, relocate them,
and write the result to the output file.
If `-r', save the text relocation for later reuse. */
struct file_entry
*entry
;
register struct relocation_info
*reloc
;
prline_file_name (entry
, stderr
);
desc
= file_open (entry
);
/* Allocate space for the file's text section */
bytes
= (char *) alloca (entry
->header
.a_text
);
/* Deal with relocation information however is appropriate */
if (entry
->textrel
) reloc
= entry
->textrel
;
else if (relocatable_output
)
read_file_relocation (entry
);
reloc
= (struct relocation_info
*) alloca (entry
->header
.a_trsize
);
lseek (desc
, text_offset (entry
) + entry
->header
.a_text
+ entry
->header
.a_data
, 0);
if (entry
->header
.a_trsize
!= read (desc
, reloc
, entry
->header
.a_trsize
))
fatal_with_file ("premature eof in text relocation of ", entry
);
/* Read the text section into core. */
lseek (desc
, text_offset (entry
), 0);
if (entry
->header
.a_text
!= read (desc
, bytes
, entry
->header
.a_text
))
fatal_with_file ("premature eof in text section of ", entry
);
/* Relocate the text according to the text relocation. */
perform_relocation (bytes
, entry
->text_start_address
, entry
->header
.a_text
,
reloc
, entry
->header
.a_trsize
, entry
);
/* Write the relocated text to the output file. */
mywrite (bytes
, 1, entry
->header
.a_text
, outdesc
);
/* Relocate the data segment of each input file
and write to the output file. */
fprintf (stderr
, "Copying and relocating data:\n\n");
each_full_file (copy_data
, 0);
/* Write out the set element vectors. See digest symbols for
description of length of the set vector section. */
mywrite (set_vectors
, 2 * set_symbol_count
+ set_vector_count
,
sizeof (unsigned long), outdesc
);
padfile (data_pad
, outdesc
);
/* Read the data segment contents of ENTRY, relocate them,
and write the result to the output file.
If `-r', save the data relocation for later reuse.
See comments in `copy_text'. */
struct file_entry
*entry
;
register struct relocation_info
*reloc
;
prline_file_name (entry
, stderr
);
desc
= file_open (entry
);
bytes
= (char *) alloca (entry
->header
.a_data
);
if (entry
->datarel
) reloc
= entry
->datarel
;
else if (relocatable_output
) /* Will need this again */
read_file_relocation (entry
);
reloc
= (struct relocation_info
*) alloca (entry
->header
.a_drsize
);
lseek (desc
, text_offset (entry
) + entry
->header
.a_text
+ entry
->header
.a_data
+ entry
->header
.a_trsize
,
if (entry
->header
.a_drsize
!= read (desc
, reloc
, entry
->header
.a_drsize
))
fatal_with_file ("premature eof in data relocation of ", entry
);
lseek (desc
, text_offset (entry
) + entry
->header
.a_text
, 0);
if (entry
->header
.a_data
!= read (desc
, bytes
, entry
->header
.a_data
))
fatal_with_file ("premature eof in data section of ", entry
);
perform_relocation (bytes
, entry
->data_start_address
- entry
->header
.a_text
,
entry
->header
.a_data
, reloc
, entry
->header
.a_drsize
, entry
);
mywrite (bytes
, 1, entry
->header
.a_data
, outdesc
);
/* Relocate ENTRY's text or data section contents.
DATA is the address of the contents, in core.
DATA_SIZE is the length of the contents.
PC_RELOCATION is the difference between the address of the contents
in the output file and its address in the input file.
RELOC_INFO is the address of the relocation info, in core.
RELOC_SIZE is its length in bytes. */
/* This version is about to be severly hacked by Randy. Hope it
perform_relocation (data
, pc_relocation
, data_size
, reloc_info
, reloc_size
, entry
)
struct relocation_info
*reloc_info
;
struct file_entry
*entry
;
register struct relocation_info
*p
= reloc_info
;
struct relocation_info
*end
= reloc_info
+ reloc_size
/ sizeof (struct relocation_info
);
int text_relocation
= entry
->text_start_address
;
int data_relocation
= entry
->data_start_address
- entry
->header
.a_text
;
= entry
->bss_start_address
- entry
->header
.a_text
- entry
->header
.a_data
;
register int relocation
= 0;
register int addr
= RELOC_ADDRESS(p
);
register unsigned int mask
= 0;
fatal_with_file ("relocation address out of range in ", entry
);
int symindex
= RELOC_SYMBOL (p
) * sizeof (struct nlist
);
(((char *)entry
->symbols
) + symindex
))
/* Resolve indirection */
if ((sp
->defined
& ~N_EXT
) == N_INDR
)
sp
= (symbol
*) sp
->value
;
if (symindex
>= entry
->header
.a_syms
)
fatal_with_file ("relocation symbolnum out of range in ", entry
);
/* If the symbol is undefined, leave it at zero. */
else switch (RELOC_TYPE(p
))
relocation
= text_relocation
;
/* A word that points to beginning of the the data section
initially contains not 0 but rather the "address" of that section
in the input file, which is the length of the file's text. */
relocation
= data_relocation
;
/* Similarly, an input word pointing to the beginning of the bss
initially contains the length of text plus data of the file. */
relocation
= bss_relocation
;
/* Don't know why this code would occur, but apparently it does. */
fatal_with_file ("nonexternal relocation code invalid in ", entry
);
relocation
+= RELOC_ADD_EXTRA(p
);
/* Non-PC relative relocations which are absolute
or which have become non-external now have fixed
relocations. Set the ADD_EXTRA of this relocation
to be the relocation we have now determined. */
if ((int)p
->r_type
<= RELOC_32
|| RELOC_EXTERN_P (p
) == 0)
RELOC_ADD_EXTRA (p
) = relocation
;
/* External PC-relative relocations continue to move around;
update their relocations by the amount they have moved
else if (RELOC_EXTERN_P (p
))
RELOC_ADD_EXTRA (p
) -= pc_relocation
;
relocation
-= pc_relocation
;
relocation
>>= RELOC_VALUE_RIGHTSHIFT(p
);
/* Unshifted mask for relocation */
mask
= 1 << RELOC_TARGET_BITSIZE(p
) - 1;
/* Shift everything up to where it's going to be used */
relocation
<<= RELOC_TARGET_BITPOS(p
);
mask
<<= RELOC_TARGET_BITPOS(p
);
switch (RELOC_TARGET_SIZE(p
))
if (RELOC_MEMORY_SUB_P(p
))
relocation
-= mask
& *(char *) (data
+ addr
);
else if (RELOC_MEMORY_ADD_P(p
))
relocation
+= mask
& *(char *) (data
+ addr
);
*(char *) (data
+ addr
) &= ~mask
;
*(char *) (data
+ addr
) |= relocation
;
if (((int) data
+ addr
& 1) == 0)
if (RELOC_MEMORY_SUB_P(p
))
relocation
-= mask
& *(short *) (data
+ addr
);
else if (RELOC_MEMORY_ADD_P(p
))
relocation
+= mask
& *(short *) (data
+ addr
);
*(short *) (data
+ addr
) &= ~mask
;
*(short *) (data
+ addr
) |= relocation
;
* The CCI Power 6 (aka Tahoe) architecture has byte-aligned
* instruction operands but requires data accesses to be aligned.
unsigned char *da
= (unsigned char *) (data
+ addr
);
unsigned short s
= da
[0] << 8 | da
[1];
if (RELOC_MEMORY_SUB_P(p
))
else if (RELOC_MEMORY_ADD_P(p
))
#ifndef _CROSS_TARGET_ARCH
if (((int) data
+ addr
& 3) == 0)
if (RELOC_MEMORY_SUB_P(p
))
relocation
-= mask
& *(long *) (data
+ addr
);
else if (RELOC_MEMORY_ADD_P(p
))
relocation
+= mask
& *(long *) (data
+ addr
);
*(long *) (data
+ addr
) &= ~mask
;
*(long *) (data
+ addr
) |= relocation
;
unsigned char *da
= (unsigned char *) (data
+ addr
);
unsigned long l
= da
[0] << 24 | da
[1] << 16 | da
[2] << 8 | da
[3];
if (RELOC_MEMORY_SUB_P(p
))
else if (RELOC_MEMORY_ADD_P(p
))
/* Handle long word alignment requirements of SPARC architecture */
/* WARNING: This fix makes an assumption on byte ordering */
/* Marc Ullman, Stanford University Nov. 1 1989 */
if (RELOC_MEMORY_SUB_P(p
)) {
((*(unsigned short *) (data
+ addr
) << 16) |
*(unsigned short *) (data
+ addr
+ 2));
} else if (RELOC_MEMORY_ADD_P(p
)) {
((*(unsigned short *) (data
+ addr
) << 16) |
*(unsigned short *) (data
+ addr
+ 2));
*(unsigned short *) (data
+ addr
) &= (~mask
>> 16);
*(unsigned short *) (data
+ addr
+ 2) &= (~mask
& 0xffff);
*(unsigned short *) (data
+ addr
) |= (relocation
>> 16);
*(unsigned short *) (data
+ addr
+ 2) |= (relocation
& 0xffff);
fatal_with_file ("Unimplemented relocation field length in ", entry
);
/* For relocatable_output only: write out the relocation,
relocating the addresses-to-be-relocated. */
void coptxtrel (), copdatrel ();
fprintf (stderr
, "Writing text relocation:\n\n");
/* Assign each global symbol a sequence number, giving the order
in which `write_syms' will write it.
This is so we can store the proper symbolnum fields
in relocation entries we write. */
for (i
= 0; i
< TABSIZE
; i
++)
for (sp
= symtab
[i
]; sp
; sp
= sp
->link
)
if (sp
->referenced
|| sp
->defined
)
/* Leave room for the reference required by N_INDR, if
if ((sp
->defined
& ~N_EXT
) == N_INDR
)
/* Correct, because if (relocatable_output), we will also be writing
whatever indirect blocks we have. */
if (count
!= defined_global_sym_count
+ undefined_global_sym_count
+ global_indirect_count
)
fatal ("internal error");
/* Write out the relocations of all files, remembered from copy_text. */
each_full_file (coptxtrel
, 0);
fprintf (stderr
, "\nWriting data relocation:\n\n");
each_full_file (copdatrel
, 0);
struct file_entry
*entry
;
register struct relocation_info
*p
, *end
;
register int reloc
= entry
->text_start_address
;
end
= (struct relocation_info
*) (entry
->header
.a_trsize
+ (char *) p
);
RELOC_ADDRESS(p
) += reloc
;
register int symindex
= RELOC_SYMBOL(p
) * sizeof (struct nlist
);
symbol
*symptr
= ((symbol
*)
(((char *)entry
->symbols
) + symindex
))
if (symindex
>= entry
->header
.a_syms
)
fatal_with_file ("relocation symbolnum out of range in ", entry
);
/* Resolve indirection. */
if ((symptr
->defined
& ~N_EXT
) == N_INDR
)
symptr
= (symbol
*) symptr
->value
;
/* If the symbol is now defined, change the external relocation
RELOC_SYMBOL(p
) = (symptr
->defined
& N_TYPE
);
/* If we aren't going to be adding in the value in
memory on the next pass of the loader, then we need
to add it in from the relocation entry. Otherwise
the work we did in this pass is lost. */
if (!RELOC_MEMORY_ADD_P(p
))
RELOC_ADD_EXTRA (p
) += symptr
->value
;
/* Debugger symbols come first, so have to start this
RELOC_SYMBOL(p
) = (symptr
->def_count
+ nsyms
- defined_global_sym_count
- undefined_global_sym_count
- global_indirect_count
);
mywrite (entry
->textrel
, 1, entry
->header
.a_trsize
, outdesc
);
struct file_entry
*entry
;
register struct relocation_info
*p
, *end
;
/* Relocate the address of the relocation.
Old address is relative to start of the input file's data section.
New address is relative to start of the output file's data section. */
register int reloc
= entry
->data_start_address
- text_size
;
end
= (struct relocation_info
*) (entry
->header
.a_drsize
+ (char *) p
);
RELOC_ADDRESS(p
) += reloc
;
register int symindex
= RELOC_SYMBOL(p
) * sizeof (struct nlist
);
symbol
*symptr
= ((symbol
*)
(((char *)entry
->symbols
) + symindex
))
if (symindex
>= entry
->header
.a_syms
)
fatal_with_file ("relocation symbolnum out of range in ", entry
);
/* Resolve indirection. */
if ((symptr
->defined
& ~N_EXT
) == N_INDR
)
symptr
= (symbol
*) symptr
->value
;
symtype
= symptr
->defined
& N_TYPE
;
if (force_common_definition
|| symtype
== N_DATA
|| symtype
== N_TEXT
|| symtype
== N_ABS
)
RELOC_SYMBOL(p
) = symtype
;
/* Debugger symbols come first, so have to start this
(((char *)entry
->symbols
) + symindex
))
+ nsyms
- defined_global_sym_count
- undefined_global_sym_count
- global_indirect_count
);
mywrite (entry
->datarel
, 1, entry
->header
.a_drsize
, outdesc
);
void write_string_table ();
/* Offsets and current lengths of symbol and string tables in output file. */
/* Address in output file where string table starts. */
/* Offset within string table
where the strings in `strtab_vector' should be written. */
/* Total size of string table strings allocated so far,
including strings in `strtab_vector'. */
/* Vector whose elements are strings to be added to the string table. */
/* Vector whose elements are the lengths of those strings. */
/* Index in `strtab_vector' at which the next string will be stored. */
/* Add the string NAME to the output file string table.
Record it in `strtab_vector' to be output later.
Return the index within the string table that this string will have. */
assign_string_table_index (name
)
register int index
= strtab_size
;
register int len
= strlen (name
) + 1;
strtab_vector
[strtab_index
] = name
;
strtab_lens
[strtab_index
++] = len
;
FILE *outstream
= (FILE *) 0;
/* Write the contents of `strtab_vector' into the string table.
This is done once for each file's local&debugger symbols
and once for the global symbols. */
lseek (outdesc
, string_table_offset
+ string_table_len
, 0);
outstream
= fdopen (outdesc
, "w");
for (i
= 0; i
< strtab_index
; i
++)
fwrite (strtab_vector
[i
], 1, strtab_lens
[i
], outstream
);
string_table_len
+= strtab_lens
[i
];
/* Report I/O error such as disk full. */
perror_name (output_filename
);
/* Write the symbol table and string table of the output file. */
/* Number of symbols written so far. */
/* Buffer big enough for all the global symbols. One
extra struct for each indirect symbol to hold the extra reference
= (struct nlist
*) alloca ((defined_global_sym_count
+ undefined_global_sym_count
* sizeof (struct nlist
));
/* Pointer for storing into BUF. */
register struct nlist
*bufp
= buf
;
/* Size of string table includes the bytes that store the size. */
strtab_size
= sizeof strtab_size
;
symbol_table_offset
= N_SYMOFF (outheader
);
string_table_offset
= N_STROFF (outheader
);
string_table_len
= strtab_size
;
if (strip_symbols
== STRIP_ALL
)
/* Write the local symbols defined by the various files. */
each_file (write_file_syms
, &syms_written
);
/* Now write out the global symbols. */
/* Allocate two vectors that record the data to generate the string
table from the global symbols written so far. This must include
extra space for the references following indirect outputs. */
strtab_vector
= (char **) alloca ((num_hash_tab_syms
+ global_indirect_count
) * sizeof (char *));
strtab_lens
= (int *) alloca ((num_hash_tab_syms
+ global_indirect_count
) * sizeof (int));
/* Scan the symbol hash table, bucket by bucket. */
for (i
= 0; i
< TABSIZE
; i
++)
for (sp
= symtab
[i
]; sp
; sp
= sp
->link
)
/* Compute a `struct nlist' for the symbol. */
if (sp
->defined
|| sp
->referenced
)
/* common condition needs to be before undefined condition */
/* because unallocated commons are set undefined in */
if (sp
->defined
> 1) /* defined with known type */
/* If the target of an indirect symbol has been
defined and we are outputting an executable,
resolve the indirection; it's no longer needed */
&& ((sp
->defined
& N_TYPE
) == N_INDR
)
&& (((symbol
*) sp
->value
)->defined
> 1))
symbol
*newsp
= (symbol
*) sp
->value
;
nl
.n_type
= newsp
->defined
;
nl
.n_value
= newsp
->value
;
if (sp
->defined
!= (N_INDR
| N_EXT
))
else if (sp
->max_common_size
) /* defined as common but not allocated. */
/* happens only with -r and not -d */
/* write out a common definition */
nl
.n_type
= N_UNDF
| N_EXT
;
nl
.n_value
= sp
->max_common_size
;
else if (!sp
->defined
) /* undefined -- legit only if -r */
nl
.n_type
= N_UNDF
| N_EXT
;
fatal ("internal error: %s defined in mysterious way", sp
->name
);
/* Allocate string table space for the symbol name. */
nl
.n_un
.n_strx
= assign_string_table_index (sp
->name
);
/* Output to the buffer and count it. */
if (nl
.n_type
== (N_INDR
| N_EXT
))
xtra_ref
.n_type
= N_EXT
| N_UNDF
;
= assign_string_table_index (((symbol
*) sp
->value
)->name
);
/* Output the buffer full of `struct nlist's. */
lseek (outdesc
, symbol_table_offset
+ symbol_table_len
, 0);
mywrite (buf
, sizeof (struct nlist
), bufp
- buf
, outdesc
);
symbol_table_len
+= sizeof (struct nlist
) * (bufp
- buf
);
if (syms_written
!= nsyms
)
fatal ("internal error: wrong number of symbols written into output file", 0);
if (symbol_table_offset
+ symbol_table_len
!= string_table_offset
)
fatal ("internal error: inconsistent symbol table length", 0);
/* Now the total string table size is known, so write it.
We are already positioned at the right place in the file. */
mywrite (&strtab_size
, sizeof (int), 1, outdesc
); /* we're at right place */
/* Write the strings for the global symbols. */
/* Write the local and debugger symbols of file ENTRY.
Increment *SYMS_WRITTEN_ADDR for each symbol that is written. */
/* Note that we do not combine identical names of local symbols.
dbx or gdb would be confused if we did that. */
write_file_syms (entry
, syms_written_addr
)
struct file_entry
*entry
;
register struct nlist
*p
= entry
->symbols
;
register struct nlist
*end
= p
+ entry
->header
.a_syms
/ sizeof (struct nlist
);
/* Buffer to accumulate all the syms before writing them.
It has one extra slot for the local symbol we generate here. */
= (struct nlist
*) alloca (entry
->header
.a_syms
+ sizeof (struct nlist
));
register struct nlist
*bufp
= buf
;
/* Upper bound on number of syms to be written here. */
int max_syms
= (entry
->header
.a_syms
/ sizeof (struct nlist
)) + 1;
/* Make tables that record, for each symbol, its name and its name's length.
The elements are filled in by `assign_string_table_index'. */
strtab_vector
= (char **) alloca (max_syms
* sizeof (char *));
strtab_lens
= (int *) alloca (max_syms
* sizeof (int));
/* Generate a local symbol for the start of this file's text. */
if (discard_locals
!= DISCARD_ALL
)
nl
.n_type
= N_FN
| N_EXT
;
nl
.n_un
.n_strx
= assign_string_table_index (entry
->local_sym_name
);
nl
.n_value
= entry
->text_start_address
;
entry
->local_syms_offset
= *syms_written_addr
* sizeof (struct nlist
);
/* Read the file's string table. */
entry
->strings
= (char *) alloca (entry
->string_size
);
read_entry_strings (file_open (entry
), entry
);
register int type
= p
->n_type
;
/* WRITE gets 1 for a non-global symbol that should be written. */
if (SET_ELEMENT_P (type
)) /* This occurs even if global. These */
/* types of symbols are never written */
/* globally, though they are stored */
write
= relocatable_output
;
else if (!(type
& (N_STAB
| N_EXT
)))
/* ordinary local symbol */
write
= ((discard_locals
!= DISCARD_ALL
)
&& !(discard_locals
== DISCARD_L
&&
(p
->n_un
.n_strx
+ entry
->strings
)[0] == LPREFIX
)
else if (!(type
& N_EXT
))
write
= (strip_symbols
== STRIP_NONE
);
/* If this symbol has a name,
allocate space for it in the output string table. */
p
->n_un
.n_strx
= assign_string_table_index (p
->n_un
.n_strx
/* Output this symbol to the buffer and count it. */
/* All the symbols are now in BUF; write them. */
lseek (outdesc
, symbol_table_offset
+ symbol_table_len
, 0);
mywrite (buf
, sizeof (struct nlist
), bufp
- buf
, outdesc
);
symbol_table_len
+= sizeof (struct nlist
) * (bufp
- buf
);
/* Write the string-table data for the symbols just written,
using the data in vectors `strtab_vector' and `strtab_lens'. */
entry
->strings
= 0; /* Since it will dissapear anyway. */
/* Copy any GDB symbol segments from the input files to the output file.
The contents of the symbol segment is copied without change
except that we store some information into the beginning of it. */
void write_file_symseg ();
each_file (write_file_symseg
, 0);
write_file_symseg (entry
)
struct file_entry
*entry
;
if (entry
->symseg_offset
== 0)
/* This entry has a symbol segment. Read the root of the segment. */
indesc
= file_open (entry
);
lseek (indesc
, entry
->symseg_offset
+ entry
->starting_offset
, 0);
if (sizeof root
!= read (indesc
, &root
, sizeof root
))
fatal_with_file ("premature end of file in symbol segment of ", entry
);
/* Store some relocation info into the root. */
root
.ldsymoff
= entry
->local_syms_offset
;
root
.textrel
= entry
->text_start_address
;
root
.datarel
= entry
->data_start_address
- entry
->header
.a_text
;
root
.bssrel
= entry
->bss_start_address
- entry
->header
.a_text
- entry
->header
.a_data
;
root
.databeg
= entry
->data_start_address
- root
.datarel
;
root
.bssbeg
= entry
->bss_start_address
- root
.bssrel
;
/* Write the modified root into the output file. */
mywrite (&root
, sizeof root
, 1, outdesc
);
/* Copy the rest of the symbol segment unchanged. */
/* Library member: number of bytes to copy is determined
from the member's total size. */
int total
= entry
->total_size
- entry
->symseg_offset
- sizeof root
;
len
= read (indesc
, buffer
, min (sizeof buffer
, total
));
if (len
!= min (sizeof buffer
, total
))
fatal_with_file ("premature end of file in symbol segment of ", entry
);
mywrite (buffer
, len
, 1, outdesc
);
/* A separate file: copy until end of file. */
while (len
= read (indesc
, buffer
, sizeof buffer
))
mywrite (buffer
, len
, 1, outdesc
);
/* Create the symbol table entries for `etext', `edata' and `end'. */
edata_symbol
= getsym ("_edata");
etext_symbol
= getsym ("_etext");
end_symbol
= getsym ("_end");
edata_symbol
= getsym ("edata");
etext_symbol
= getsym ("etext");
end_symbol
= getsym ("end");
symbol
*dynamic_symbol
= getsym ("__DYNAMIC");
dynamic_symbol
->defined
= N_ABS
| N_EXT
;
dynamic_symbol
->referenced
= 1;
dynamic_symbol
->value
= 0;
symbol
*_387_flt_symbol
= getsym ("_387_flt");
_387_flt_symbol
->defined
= N_ABS
| N_EXT
;
_387_flt_symbol
->referenced
= 1;
_387_flt_symbol
->value
= 0;
edata_symbol
->defined
= N_DATA
| N_EXT
;
etext_symbol
->defined
= N_TEXT
| N_EXT
;
end_symbol
->defined
= N_BSS
| N_EXT
;
edata_symbol
->referenced
= 1;
etext_symbol
->referenced
= 1;
end_symbol
->referenced
= 1;
/* Compute the hash code for symbol name KEY. */
k
= (((k
<< 1) + (k
>> 14)) ^ (*cp
++)) & 0x3fff;
/* Get the symbol table entry for the global symbol named KEY.
Create one if there is none. */
/* Determine the proper bucket. */
hashval
= hash_string (key
) % TABSIZE
;
for (bp
= symtab
[hashval
]; bp
; bp
= bp
->link
)
if (! strcmp (key
, bp
->name
))
/* Nothing was found; create a new symbol table entry. */
bp
= (symbol
*) xmalloc (sizeof (symbol
));
bp
->name
= (char *) xmalloc (strlen (key
) + 1);
bp
->multiply_defined
= 0;
/* Add the entry to the bucket. */
bp
->link
= symtab
[hashval
];
/* Like `getsym' but return 0 if the symbol is not already known. */
/* Determine which bucket. */
hashval
= hash_string (key
) % TABSIZE
;
for (bp
= symtab
[hashval
]; bp
; bp
= bp
->link
)
if (! strcmp (key
, bp
->name
))
STRING is a printf format string and ARG is one arg for it. */
fprintf (stderr
, "ld: ");
fprintf (stderr
, string
, arg
);
/* Report a fatal error. The error message is STRING
followed by the filename of ENTRY. */
fatal_with_file (string
, entry
)
struct file_entry
*entry
;
fprintf (stderr
, "ld: ");
fprintf (stderr
, string
);
print_file_name (entry
, stderr
);
/* Report a fatal error using the message for the last failed system call,
followed by the string NAME. */
s
= concat ("", sys_errlist
[errno
], " for %s");
/* Report a fatal error using the message for the last failed system call,
followed by the name of file ENTRY. */
struct file_entry
*entry
;
s
= concat ("", sys_errlist
[errno
], " for ");
fatal_with_file (s
, entry
);
/* Report a nonfatal error.
STRING is a format for printf, and ARG1 ... ARG3 are args for it. */
error (string
, arg1
, arg2
, arg3
)
char *string
, *arg1
, *arg2
, *arg3
;
fprintf (stderr
, "%s: ", progname
);
fprintf (stderr
, string
, arg1
, arg2
, arg3
);
/* Output COUNT*ELTSIZE bytes of data at BUF
to the descriptor DESC. */
mywrite (buf
, count
, eltsize
, desc
)
register int bytes
= count
* eltsize
;
val
= write (desc
, buf
, bytes
);
perror_name (output_filename
);
/* Output PADDING zero-bytes to descriptor OUTDESC.
PADDING may be negative; in that case, do nothing. */
padfile (padding
, outdesc
)
buf
= (char *) alloca (padding
);
mywrite (buf
, padding
, 1, outdesc
);
/* Return a newly-allocated string
whose contents concatenate the strings S1, S2, S3. */
register int len1
= strlen (s1
), len2
= strlen (s2
), len3
= strlen (s3
);
register char *result
= (char *) xmalloc (len1
+ len2
+ len3
+ 1);
strcpy (result
+ len1
, s2
);
strcpy (result
+ len1
+ len2
, s3
);
result
[len1
+ len2
+ len3
] = 0;
/* Parse the string ARG using scanf format FORMAT, and return the result.
If it does not parse, report fatal error
generating the error message using format string ERROR and ARG as arg. */
parse (arg
, format
, error
)
if (1 != sscanf (arg
, format
, &x
))
/* Like malloc but get fatal error if memory is exhausted. */
register int result
= malloc (size
);
fatal ("virtual memory exhausted", 0);
/* Like realloc but get fatal error if memory is exhausted. */
register int result
= realloc (ptr
, size
);
fatal ("virtual memory exhausted", 0);
#if defined(sun) && (TARGET == SUN4)
/* Don't use local pagesize to build for Sparc. */