# Copyright (C) 2004-2017 Free Software Foundation, Inc.
#
# This file is part of the GNU Binutils.
#
# 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
# MA 02110-1301, USA.


# Please email any bugs, comments, and/or additions to this file to:
# binutils@sources.redhat.com

# This scripts tests of all available SH architectures with all other SH
# architectures. It ensures that those combinations which should not work
# do not work, and that those that should work produce the correct output
# architecture.
#
# It looks for files in the same directory as this file named sh*.s .
# Each file must contain one or more instructions which uniquely identifies
# that architecture. The architecture name is inferred from the file name.
# It is best to use the same files used by the assembler testsuite.
#
# It also creates another architecture named 'sh-unknown' by modifying
# another arch type (there is no way to assemble such an arch) in order
# to test what the linker would do with an older object file.
#
# The script generates the architecture permutations automatically,
# but it reads the expected results from the file arch_expected.txt (also
# found in the same directory as this script).
#
# The arch_expected.txt file should NOT be hand edited. Whenever the script
# is run (e.g. with 'make check') it creates a new (usually identical) file
# named arch_results.txt in the <objdir>/ld/testsuite directory. When the
# expected results change (or new architectures are added) this new file
# can be used to replace arch_expected.txt with no modification required.


# The procedure extracts the architecture name from the objdump output.
# If there is no architecture name (or objdump output changes significantly)
# then the behaviour is undefined, but it will most likely return junk.

proc get_sh_arch { ofile } {
    global OBJDUMP

    set cmd "$OBJDUMP -f $ofile"
    verbose -log $cmd
    catch "exec $cmd" objdump_output
    verbose -log $objdump_output

    set objdump_output [string replace $objdump_output 0 \
	    [expr [string first "architecture:" $objdump_output] + 13] ""]

    return [string range $objdump_output 0 [expr [string first "," $objdump_output] - 1]]
}


# This procedure runs two tests:
#   Test 1: Check the linker can link the given files.
#   Test 2: Check that the resultant architecture is as expected.
# It also writes an entry to the arch_results.txt file.

proc test_arch { file1 file2 arch resultfile } {
    global LD

    set name1 [file tail $file1]
    set rootname1 [file rootname $name1]

    set name2 [file tail $file2]
    set rootname2 [file rootname $name2]

    set flags [big_or_little_endian]
    
    # This must use -r to prevent LD trying to relocate the (unrealistic) file
    send_log "$LD $flags -r -o ${rootname1}_${rootname2}.o $file1 $file2\n"
    catch "exec $LD $flags -r -o ${rootname1}_${rootname2}.o $file1 $file2" ld_output
    send_log $ld_output

    if {[string equal $ld_output ""] == 1} then {
	pass "$rootname1 file should link with $rootname2 file"

	set result [get_sh_arch "${rootname1}_${rootname2}.o"]
	puts $resultfile [format "%-20s %-20s %s" $file1 $file2 $result]

	if {$result == $arch} then {
	    pass "$rootname1 file with $rootname2 file should link to arch $arch"
	    file delete "${rootname1}_${rootname2}.o"
	} else {
	    fail "$rootname1 file with $rootname2 file should link to arch $arch"
	}
    } else {
	fail "$rootname1 file should link with $rootname2 file"

	puts $resultfile [format "%-20s %-20s ERROR" $file1 $file2]
	untested "$rootname2 file with $rootname2 file should link to arch $arch"
    }

}



# This procedure tests that a pair of files that are not
# supposed to link does, in fact, not link.
# It also writes an entry to the arch_results.txt file.

proc test_arch_error { file1 file2 resultfile} {
    global link_output LD

    set name1 [file tail $file1]
    set rootname1 [file rootname $name1]

    set name2 [file tail $file2]
    set rootname2 [file rootname $name2]

    # This must use -r to prevent LD trying to relocate the (unrealistic) file
    send_log "$LD -r -o ${rootname1}_${rootname2}.o $file1 $file2\n"
    catch "exec $LD -r -o ${rootname1}_${rootname2}.o $file1 $file2" ld_output
    send_log $ld_output

    if {[string equal $ld_output ""] == 1} then {
	fail "$rootname1 file should NOT link with $rootname2 file"
	puts $resultfile [format "%-20s %-20s [get_sh_arch ${rootname1}_${rootname2}.o]" $file1 $file2]
    } else {
	pass "$rootname1 file should NOT link with $rootname2 file"
	puts $resultfile [format "%-20s %-20s ERROR" $file1 $file2]
    }
}   

# These tests are not suitable for sh-coff because
# coff does not store the architecture information.

if [istarget sh*-*-elf] then {
    global subdir srcdir
    global AS

    # Find all the architectures and assemble all the files
    # we will use for the linker tests.

    set sfilelist [lsort -ascii [glob "$srcdir/$subdir/sh*.s"]]
    set ofilelist {}
    foreach sfile $sfilelist {
	set ofile "[file rootname [file tail $sfile]].o"
	lappend ofilelist $ofile

	set endian "-big"
	if [string equal [big_or_little_endian] " -EL"] then {
	    set endian "-little"
	}

	set cmd "$AS $endian -isa=any $sfile -o $ofile"
	verbose -log $cmd
	catch "exec $cmd" as_output
	if ![file exists $ofile] then {
	    verbose -log $as_output
	    perror "$sfile: assembly failed"
	}
    }

    # Create the default arch ofile
    # This cannot be created with the assembler
    # sh4al-dsp is number 6, sh-unknown is 0

    lappend ofilelist "sh-unknown.o"

    if [string equal [big_or_little_endian] " -EL"] then {
	set cmd {xxd sh4al-dsp.o | sed {s/\(^0000020: .... .... \)06/\100/} | xxd -r - sh-unknown.o}
    } else {
	set cmd {xxd sh4al-dsp.o | sed {s/\(^0000020: .... .... .... ..\)06/\100/} | xxd -r - sh-unknown.o}
    }
    verbose -log $cmd
    catch "exec $cmd" xxd_output
    verbose -log $xxd_output
    if [string equal [get_sh_arch "sh-unknown.o"] "sh4al-dsp"] then {
	perror "sh-unknown.o not generated correctly"
    }


    # Initialise the results file

    set outfile [open "arch_results.txt" w 0666]
    puts $outfile "# Generated file. DO NOT EDIT"
    puts $outfile "#"
    puts $outfile "# This file is generated by ld/testsuite/ld-sh/arch/arch.exp ."
    puts $outfile "# It contains the expected results of the tests."
    puts $outfile "# If the tests are failing because the expected results"
    puts $outfile "# have changed then run 'make check' and copy the new file"
    puts $outfile "# from <objdir>/ld/arch_results.txt"
    puts $outfile "# to   <srcdir>/ld/testsuite/ld-sh/arch/arch_expected.txt ."
    puts $outfile "# Make sure the new expected results are ALL correct."
    puts $outfile "#"
    puts $outfile [format "# %-18s %-20s %s" "FILE1" "FILE2" "OUTPUT"]
    puts $outfile [format "# %-18s %-20s %s" "-----" "-----" "------"]

    # Open the expected results file and skip the header

    set infile [open "$srcdir/$subdir/arch_expected.txt" r]
    while {[gets $infile line] >= 0 && [string match {\#*} $line]} {verbose -log "reading '$line'"}

    foreach file1 $ofilelist {
	foreach file2 $ofilelist {
	    set name1 [file tail $file1]
	    set rootname1 [file rootname $name1]

	    set name2 [file tail $file2]
	    set rootname2 [file rootname $name2]

	    # Decode the expected result from the file

	    scan $line "%s %s %s" exfile1 exfile2 exarch
	    verbose -log "exfile1 = '$exfile1', exfile2 = '$exfile2', exarch = '$exarch'"
	    verbose -log "  name1 = '$name1',   name2 = '$name2'"

	    if {[string equal $exfile1 $name1] && [string equal $exfile2 $file2]} then {
		# The expected result file makes sense and
		# appears up-to-date (the file and options match)

		if {[string equal $exarch "ERROR"]} then {
		    test_arch_error $file1 $file2 $outfile
		} else {
		    test_arch $file1 $file2 $exarch $outfile
		}
	    } else {
		# The expected result file isn't right somehow
		# so just try any old test. This will cause
		# many failures, but will genrate the results file.

		test_arch $file1 $file2 $rootname1 $outfile
	    }

	    # Read the next line from the expected result file.
	    # This is at the end because the process of skipping
	    # the header reads the first real line

	    if [gets $infile line] then {
		verbose -log "reading '$line'"
	    }
	}
    }

    close $infile
    close $outfile

    foreach file $ofilelist {
	file delete $file
    }
}