ld-lib.exp

俄罗斯高人Mamaich的Pocket gcc编译器（运行在PocketPC上）的全部源代码。

# Support routines for LD testsuite.
#   Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
#   Free Software Foundation, Inc.
#
# This file 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 2 of the License, or
# (at your option) any later version.
#
# 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
#
# default_ld_version
#	extract and print the version number of ld
#
proc default_ld_version { ld } {
    global host_triplet

    if { [which $ld] == 0 } then {
	perror "$ld does not exist"
	exit 1
    }

    catch "exec $ld --version" tmp
    set tmp [prune_warnings $tmp]
    regexp "\[^\n\]* (cygnus-|)(\[-0-9.a-zA-Z-\]+)\[\r\n\].*" $tmp version cyg number
    if [info exists number] then {
	clone_output "$ld $number\n"
    }
}

#
# default_ld_relocate
#	link an object using relocation
#
proc default_ld_relocate { ld target objects } {
    global HOSTING_EMU
    global host_triplet

    if { [which $ld] == 0 } then {
	perror "$ld does not exist"
	return 0
    }

    verbose -log "$ld $HOSTING_EMU -o $target -r $objects"

    catch "exec $ld $HOSTING_EMU -o $target -r $objects" exec_output
    set exec_output [prune_warnings $exec_output]
    if [string match "" $exec_output] then {
	return 1
    } else {
	verbose -log "$exec_output"
	return 0
    }
}

# Check to see if ld is being invoked with a non-endian output format

proc is_endian_output_format { object_flags } {

    if {[string match "*-oformat binary*" $object_flags] ||      \
        [string match "*-oformat ieee*" $object_flags] ||        \
	[string match "*-oformat ihex*" $object_flags] ||        \
	[string match "*-oformat netbsd-core*" $object_flags] || \
	[string match "*-oformat srec*" $object_flags] ||        \
	[string match "*-oformat tekhex*" $object_flags] ||      \
	[string match "*-oformat trad-core*" $object_flags] } then {
        return 0
    } else {
	return 1
    }
}

# Look for big-endian or little-endian switches in the multlib
# options and translate these into a -EB or -EL switch.  Note
# we cannot rely upon proc process_multilib_options to do this
# for us because for some targets the compiler does not support
# -EB/-EL but it does support -mbig-endian/-mlittle-endian, and
# the site.exp file will include the switch "-mbig-endian"
# (rather than "big-endian") which is not detected by proc
# process_multilib_options.

proc big_or_little_endian {} {

    if [board_info [target_info name] exists multilib_flags] {
	set tmp_flags " [board_info [target_info name] multilib_flags]";

	foreach x $tmp_flags {
	    case $x in {
		{*big*endian eb EB -eb -EB} {
		    set flags " -EB"
		    return $flags
		}
		{*little*endian el EL -el -EL} {
		    set flags " -EL"
		    return $flags
		}
	    }
	}
    }

    set flags ""
    return $flags
}

#
# default_ld_link
#	link a program using ld
#
proc default_ld_link { ld target objects } {
    global HOSTING_EMU
    global HOSTING_CRT0
    global HOSTING_LIBS
    global LIBS
    global host_triplet
    global link_output

    set objs "$HOSTING_CRT0 $objects"
    set libs "$LIBS $HOSTING_LIBS"

    if { [which $ld] == 0 } then {
	perror "$ld does not exist"
	return 0
    }

    if [is_endian_output_format $objects] then {
	set flags [big_or_little_endian]
    } else {
	set flags ""
    }
    verbose -log "$ld $HOSTING_EMU $flags -o $target $objs $libs"

    catch "exec $ld $HOSTING_EMU $flags -o $target $objs $libs" link_output
    set exec_output [prune_warnings $link_output]
    if [string match "" $link_output] then {
	return 1
    } else {
	verbose -log "$link_output"
	return 0
    }
}

#
# default_ld_simple_link
#	link a program using ld, without including any libraries
#
proc default_ld_simple_link { ld target objects } {
    global host_triplet
    global link_output

    if { [which $ld] == 0 } then {
	perror "$ld does not exist"
	return 0
    }

    if [is_endian_output_format $objects] then {
	set flags [big_or_little_endian]
    } else {
	set flags ""
    }

    verbose -log "$ld $flags -o $target $objects"

    catch "exec $ld $flags -o $target $objects" link_output
    set exec_output [prune_warnings $link_output]

    # We don't care if we get a warning about a non-existent start
    # symbol, since the default linker script might use ENTRY.
    regsub -all "(^|\n)(\[^\n\]*: warning: cannot find entry symbol\[^\n\]*\n?)" $exec_output "\\1" exec_output

    if [string match "" $exec_output] then {
	return 1
    } else {
	verbose -log "$exec_output"
	return 0
    }
}

#
# default_ld_compile
#	compile an object using cc
#
proc default_ld_compile { cc source object } {
    global CFLAGS
    global srcdir
    global subdir
    global host_triplet
    global gcc_gas_flag

    set cc_prog $cc
    if {[llength $cc_prog] > 1} then {
	set cc_prog [lindex $cc_prog 0]
    }
    if {[which $cc_prog] == 0} then {
	perror "$cc_prog does not exist"
	return 0
    }

    catch "exec rm -f $object" exec_output

    set flags "-I$srcdir/$subdir $CFLAGS"

    # If we are compiling with gcc, we want to add gcc_gas_flag to
    # flags.  Rather than determine this in some complex way, we guess
    # based on the name of the compiler.
    if {[string match "*gcc*" $cc] || [string match "*++*" $cc]} then {
	set flags "$gcc_gas_flag $flags"
    }

    if [board_info [target_info name] exists multilib_flags] {
	append flags " [board_info [target_info name] multilib_flags]";
    }

    verbose -log "$cc $flags -c $source -o $object"

    catch "exec $cc $flags -c $source -o $object" exec_output
    set exec_output [prune_warnings $exec_output]
    if [string match "" $exec_output] then {
	if {![file exists $object]} then {
	    regexp ".*/(\[^/\]*)$" $source all dobj
	    regsub "\\.c" $dobj ".o" realobj
	    verbose "looking for $realobj"
	    if {[file exists $realobj]} then {
		verbose -log "mv $realobj $object"
		catch "exec mv $realobj $object" exec_output
		set exec_output [prune_warnings $exec_output]
		if {![string match "" $exec_output]} then {
		    verbose -log "$exec_output"
		    perror "could not move $realobj to $object"
		    return 0
		}
	    } else {
		perror "$object not found after compilation"
		return 0
	    }
	}
	return 1
    } else {
	verbose -log "$exec_output"
	perror "$source: compilation failed"
	return 0
    }
}

#
# default_ld_assemble
#	assemble a file
#
proc default_ld_assemble { as source object } {
    global ASFLAGS
    global host_triplet

    if {[which $as] == 0} then {
	perror "$as does not exist"
	return 0
    }

    if ![info exists ASFLAGS] { set ASFLAGS "" }

    set flags [big_or_little_endian]

    verbose -log "$as $flags $ASFLAGS -o $object $source"

    catch "exec $as $flags $ASFLAGS -o $object $source" exec_output
    set exec_output [prune_warnings $exec_output]
    if [string match "" $exec_output] then {
	return 1
    } else {
	verbose -log "$exec_output"
	perror "$source: assembly failed"
	return 0
    }
}

#
# default_ld_nm
#	run nm on a file, putting the result in the array nm_output
#
proc default_ld_nm { nm nmflags object } {
    global NMFLAGS
    global nm_output
    global host_triplet

    if {[which $nm] == 0} then {
	perror "$nm does not exist"
	return 0
    }

    if {[info exists nm_output]} {
      unset nm_output
    }

    if ![info exists NMFLAGS] { set NMFLAGS "" }

    # Ensure consistent sorting of symbols
    if {[info exists env(LC_ALL)]} {
	set old_lc_all $env(LC_ALL)
    }
    set env(LC_ALL) "C"
    verbose -log "$nm $NMFLAGS $nmflags $object >tmpdir/nm.out"

    catch "exec $nm $NMFLAGS $nmflags $object >tmpdir/nm.out" exec_output
    if {[info exists old_lc_all]} {
	set env(LC_ALL) $old_lc_all
    } else {
	unset env(LC_ALL)
    }
    set exec_output [prune_warnings $exec_output]
    if [string match "" $exec_output] then {
	set file [open tmpdir/nm.out r]
	while { [gets $file line] != -1 } {
	    verbose "$line" 2
	    if [regexp "^(\[0-9a-fA-F\]+) \[a-zA-Z0-9\] \\.*(.+)$" $line whole value name] {
                set name [string trimleft $name "_"]
		verbose "Setting nm_output($name) to 0x$value" 2
		set nm_output($name) 0x$value
	    }
	}
	close $file
	return 1
    } else {
	verbose -log "$exec_output"
	perror "$object: nm failed"
	return 0
    }
}

#
# is_elf_format
#	true if the object format is known to be ELF
#
proc is_elf_format {} {
    if { ![istarget *-*-sysv4*] \
	 && ![istarget *-*-unixware*] \
	 && ![istarget *-*-elf*] \
	 && ![istarget *-*-eabi*] \
	 && ![istarget *-*-linux*] \
	 && ![istarget *-*-irix5*] \
	 && ![istarget *-*-irix6*] \
	 && ![istarget *-*-solaris2*] } {
	return 0
    }

    if { [istarget *-*-linux*aout*] \
	 || [istarget *-*-linux*oldld*] } {
	return 0
    }
    return 1
}

#
# simple_diff
#	compares two files line-by-line
#	returns differences if exist
#	returns null if file(s) cannot be opened
#
proc simple_diff { file_1 file_2 } {
    global target

    set eof -1
    set differences 0

    if [file exists $file_1] then {
	set file_a [open $file_1 r]
    } else {
	warning "$file_1 doesn't exist"
	return
    }

    if [file exists $file_2] then {
	set file_b [open $file_2 r]
    } else {
	fail "$file_2 doesn't exist"
	return
    }

    verbose "# Diff'ing: $file_1 $file_2\n" 2

    while { [gets $file_a line] != $eof } {
	if [regexp "^#.*$" $line] then {
	    continue
	} else {
	    lappend list_a $line
	}
    }
    close $file_a

    while { [gets $file_b line] != $eof } {
	if [regexp "^#.*$" $line] then {
	    continue
	} else {
	    lappend list_b $line
	}
    }
    close $file_b

    for { set i 0 } { $i < [llength $list_a] } { incr i } {
	set line_a [lindex $list_a $i]
	set line_b [lindex $list_b $i]

	verbose "\t$file_1: $i: $line_a\n" 3
	verbose "\t$file_2: $i: $line_b\n" 3
	if [string compare $line_a $line_b] then {
	    verbose -log "\t$file_1: $i: $line_a\n"
	    verbose -log "\t$file_2: $i: $line_b\n"

	    fail "Test: $target"
	    return
	}
    }

    if { [llength $list_a] != [llength $list_b] } {
	fail "Test: $target"
	return
    }

    if $differences<1 then {
	pass "Test: $target"
    }
}

# run_dump_test FILE
# Copied from gas testsuite, tweaked and further extended.
#
# Assemble a .s file, then run some utility on it and check the output.
#
# There should be an assembly language file named FILE.s in the test
# suite directory, and a pattern file called FILE.d.  `run_dump_test'
# will assemble FILE.s, run some tool like `objdump', `objcopy', or
# `nm' on the .o file to produce textual output, and then analyze that
# with regexps.  The FILE.d file specifies what program to run, and
# what to expect in its output.
#
# The FILE.d file begins with zero or more option lines, which specify
# flags to pass to the assembler, the program to run to dump the
# assembler's output, and the options it wants.  The option lines have
# the syntax:
#
#         # OPTION: VALUE
#
# OPTION is the name of some option, like "name" or "objdump", and
# VALUE is OPTION's value.  The valid options are described below.
# Whitespace is ignored everywhere, except within VALUE.  The option
# list ends with the first line that doesn't match the above syntax
# (hmm, not great for error detection).
#
# The interesting options are:
#
#   name: TEST-NAME
#	The name of this test, passed to DejaGNU's `pass' and `fail'
#       commands.  If omitted, this defaults to FILE, the root of the
#       .s and .d files' names.
#
#   as: FLAGS
#	When assembling, pass FLAGS to the assembler.
#       If assembling several files, you can pass different assembler
#       options in the "source" directives.  See below.
#
#   ld: FLAGS
#       Link assembled files using FLAGS, in the order of the "source"
#       directives, when using multiple files.
#
#   objcopy_linked_file: FLAGS
#	Run objcopy on the linked file with the specified flags.
#	This lets you transform the linked file using objcopy, before the
#	result is analyzed by an analyzer program specified below (which
#	may in turn *also* be objcopy).
#
#   PROG: PROGRAM-NAME
#       The name of the program to run to analyze the .o file produced
#       by the assembler or the linker output.  This can be omitted;
#       run_dump_test will guess which program to run by seeing which of
#       the flags options below is present.
#
#   objdump: FLAGS
#   nm: FLAGS
#   objcopy: FLAGS
#	Use the specified program to analyze the assembler or linker
#       output file, and pass it FLAGS, in addition to the output name.
#	Note that they are run with LC_ALL=C in the environment to give
#	consistent sorting of symbols.
#
#   source: SOURCE [FLAGS]
#	Assemble the file SOURCE.s using the flags in the "as" directive
#       and the (optional) FLAGS.  If omitted, the source defaults to
#       FILE.s.
#       This is useful if several .d files want to share a .s file.
#       More than one "source" directive can be given, which is useful
#       when testing linking.
#
#   xfail: TARGET
#       The test is expected to fail on TARGET.  This may occur more than
#       once.
#
#   target: TARGET
#       Only run the test for TARGET.  This may occur more than once; the
#       target being tested must match at least one.
#
#   notarget: TARGET
#       Do not run the test for TARGET.  This may occur more than once;
#       the target being tested must not match any of them.
#
#   error: REGEX
#	An error with message matching REGEX must be emitted for the test
#	to pass.  The PROG, objdump, nm and objcopy options have no
#	meaning and need not supplied if this is present.
#
# Each option may occur at most once unless otherwise mentioned.
#
# After the option lines come regexp lines.  `run_dump_test' calls
# `regexp_diff' to compare the output of the dumping tool against the
# regexps in FILE.d.  `regexp_diff' is defined later in this file; see
# further comments there.

proc run_dump_test { name } {
    global subdir srcdir
    global OBJDUMP NM AS OBJCOPY READELF LD
    global OBJDUMPFLAGS NMFLAGS ASFLAGS OBJCOPYFLAGS READELFFLAGS LDFLAGS
    global host_triplet runtests
    global env

    if [string match "*/*" $name] {
	set file $name
	set name [file tail $name]
    } else {
	set file "$srcdir/$subdir/$name"
    }

    if ![runtest_file_p $runtests $name] then {
	return
    }

    set opt_array [slurp_options "${file}.d"]
    if { $opt_array == -1 } {
	perror "error reading options from $file.d"
	unresolved $subdir/$name
	return
    }
    set dumpfile tmpdir/dump.out
    set run_ld 0
    set run_objcopy 0
    set opts(as) {}
    set opts(ld) {}
    set opts(xfail) {}
    set opts(target) {}
    set opts(notarget) {}
    set opts(objdump) {}
    set opts(nm) {}
    set opts(objcopy) {}
    set opts(readelf) {}
    set opts(name) {}
    set opts(PROG) {}
    set opts(source) {}
    set opts(error) {}
    set opts(objcopy_linked_file) {}
    set asflags(${file}.s) {}