fastbind(1)fastbind(1)NAMEfastbind - Prepare an incomplete executable for faster program start-up
SYNOPSIS
incomplete-executable...
DESCRIPTION
is a tool that can improve the start-up time of programs that use
shared libraries (incomplete executables) by storing information about
needed shared library symbols in the executable file.
performs analysis on the symbols used to bind an executable and all of
it's dependent shared libraries, and stores this information in the
executable file. The next time the executable is run, the dynamic
loader will notice that this information is available, and it will use
this fastbind information to bind the executable instead of the stan‐
dard search method for binding the symbols. For Itanium-based systems,
the dynamic loader is for 32-bit mode or for 64-bit mode. For PA-RISC
systems, the dynamic loader is for 32-bit mode or for 64-bit mode.
Since writes the fastbind information in the executable file, you must
have write permission on the executable file. Also, if the executable
file being analyzed is being run as another process, the file will be
locked against modifications by the kernel, and will fail.
If the shared libraries that an executable is dependent on are modified
after the fastbind information is created, the dynamic loader will
silently revert to standard search method for binding the symbols. The
fastbind information can be re-created by running on the executable
again. will automatically erase the old fastbind information and gen‐
erate the new one.
The option can be used to instruct the linker to run the fastbind tool
on an incomplete executable it has produced.
Environment Variables
If determines that the fastbind information is out of date, it will
silently revert to standard search method for binding the symbols. If
the environment variable is set to the dynamic loader will emit a warn‐
ing message when the fastbind information is out of date.
The environment variable can be set to to make the dynamic loader
ignore the fastbind information and revert to the standard search
method for binding the symbols.
Options
recognizes the following options:
Remove the fastbind information from the executable, returning
it to the
same state it was in before was originally run on
it.
Normally, if
detects any unsatisfied symbols while building the
fastbind information, it will generate an error mes‐
sage and not modify the executable file. When is
invoked with option however, unresolved symbols are
allowed.
EXTERNAL INFLUENCES
Environment Variables
The following internationalization variables affect the execution of
Determines the locale category for native language, local customs and
coded character set in the absence of and other environment
variables. If is not specified or is set to the empty string, a
default of (see lang(5)) is used instead of
Determines the values for all locale categories and has precedence over
and other environment variables.
Determines the locale that should be used to affect the format
and contents of diagnostic messages written to standard error.
Determines the locale category for numeric formatting.
Determines the locale category for character handling functions.
Determines the location of message catalogs for the processing
of
If any internationalization variable contains an invalid setting,
behaves as if all internationalization variables are set to See envi‐
ron(5).
In addition, the following environment variable affects
Specifies a directory
for temporary files (see tmpnam(3S)).
DIAGNOSTICS
returns zero when the operation is successful. A non-zero return code
indicates that an error occurred.
EXAMPLES
To run on the executable file
enter:
To later remove the fastbind information from the executable file
enter:
WARNINGS
32-bit PA-RISC does not work with EXEC_MAGIC executables.
effectively enforces bind restricted and bind immediate. For example,
consider an executable linked bind deferred, which calls a function
foo() defined in an implicitly loaded library. Before the actual call
is made, if it explicitly loads a shared library (using shl_load(3X)
with having a definition for when is finally called, it will be
resolved from the explicitly loaded library. But after running the sym‐
bol will be resolved from the implicitly loaded library.
AUTHOR
was developed by Hewlett-Packard.
FILES
output file
32-bit PA-RISC dynamic loader
32-bit Itanium-based dynamic loader
64-bit PA-RISC dynamic loader
64-bit Itanium-based dynamic loader
message catalog
temporary files
SEE ALSO
System Tools
ld(1) invoke the link editor
Miscellaneous
a.out(4) assembler, compiler, and linker output
dld.sl(5) PA-RISC dynamic loader
dld.so(5) Itanium-based dynamic loader
Texts and Tutorials
