1#   Copyright (C) 2003-2014 Free Software Foundation, Inc.
2#
3# This file is part of the GNU Binutils.
4#
5# This program is free software; you can redistribute it and/or modify
6# it under the terms of the GNU General Public License as published by
7# the Free Software Foundation; either version 3 of the License, or
8# (at your option) any later version.
9#
10# This program is distributed in the hope that it will be useful,
11# but WITHOUT ANY WARRANTY; without even the implied warranty of
12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13# GNU General Public License for more details.
14#
15# You should have received a copy of the GNU General Public License
16# along with this program; if not, write to the Free Software
17# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
18# MA 02110-1301, USA.
19
20if {![istarget mips*-*-*] || ![is_elf_format]} {
21    return
22}
23
24global ldemul
25if {[istarget mips*-*-irix6*]} {
26    set ldemul "-melf32bsmip"
27} elseif {[istarget mips*el-*-linux*]} {
28    set ldemul "-melf32ltsmip"
29} elseif {[istarget mips*-*-linux*]} {
30    set ldemul "-melf32btsmip"
31} elseif {[istarget mips*el-*-*freebsd*]} {
32    set ldemul "-melf32ltsmip_fbsd"
33} elseif {[istarget mips*-*-*freebsd*]} {
34    set ldemul "-melf32btsmip_fbsd"
35} else {
36    set ldemul ""
37}
38
39# Assemble jr.s using each of the argument lists in ARGLIST.  Return the
40# list of object files on success and an empty list on failure.
41proc assemble_for_flags {arglist} {
42    global as srcdir subdir
43
44    set objs {}
45    set index 1
46
47    foreach args $arglist {
48	set obj "tmpdir/mips-flags-${index}.o"
49	if {![ld_assemble $as "$args $srcdir/$subdir/jr.s" $obj]} {
50	    return ""
51	}
52	lappend objs $obj
53	incr index
54    }
55    return $objs
56}
57
58# Assemble a file using each set of arguments in ARGLIST.  Check that
59# the objects can be linked together and that the readelf output
60# includes each flag named in FLAGS.
61proc good_combination {arglist flags} {
62    global ld ldemul READELF
63
64    set finalobj "tmpdir/mips-flags.o"
65    set testname "MIPS compatible objects: $arglist"
66    set objs [assemble_for_flags $arglist]
67
68    if {$objs == ""} {
69	unresolved $testname
70    } elseif {![ld_simple_link "$ld $ldemul" $finalobj "-r $objs"]} {
71	fail $testname
72    } else {
73	catch "exec $READELF --headers $finalobj" output
74	if {![regexp "Flags: *(\[^\n\]*)" $output full gotflags]} {
75	    unresolved $testname
76	} else {
77	    set failed 0
78
79	    # GOTFLAGS is a list of flags separated by ", ".
80	    # Convert it to a tcl list.
81	    regsub -all ", " $gotflags "," gotflags
82	    set gotflags [split $gotflags ","]
83
84	    foreach flag $flags {
85		if {[lsearch -exact $gotflags $flag] < 0} {
86		    set failed 1
87		}
88	    }
89	    if {$failed} {
90		fail $testname
91	    } else {
92		pass $testname
93	    }
94	}
95    }
96}
97
98# Like good_combination, but check that the objects can't be linked
99# together successfully and that the output includes MESSAGE.
100proc bad_combination {arglist message} {
101    global link_output ld ldemul
102
103    set finalobj "tmpdir/mips-flags.o"
104    set testname "MIPS incompatible objects: $arglist"
105    set objs [assemble_for_flags $arglist]
106
107    if {$objs == ""} {
108	unresolved $testname
109    } elseif {[ld_simple_link "$ld $ldemul" $finalobj "-r $objs"]
110	      || [string first $message $link_output] < 0} {
111	fail $testname
112    } else {
113	pass $testname
114    }
115}
116
117# Routines to check for various kinds of incompatibility.
118
119proc abi_conflict {arglist firstabi secondabi} {
120    bad_combination $arglist \
121      "linking $secondabi module with previous $firstabi modules"
122}
123
124proc isa_conflict {arglist firstisa secondisa} {
125    bad_combination $arglist \
126      "linking mips:$secondisa module with previous mips:$firstisa modules"
127}
128
129proc regsize_conflict {arglist} {
130    bad_combination $arglist \
131      "linking 32-bit code with 64-bit code"
132}
133
134abi_conflict { "-mabi=eabi -mgp32" "-mips4 -mabi=32" } EABI32 O32
135abi_conflict { "-mips4 -mabi=o64" "-mips3 -mabi=eabi" } O64 EABI64
136
137isa_conflict { "-march=vr5500 -32" "-march=sb1 -32" } 5500 sb1
138isa_conflict { "-march=vr5400 -32" "-march=4120 -32" } 5400 4120
139isa_conflict { "-march=r3900 -32" "-march=r6000 -32" } 3900 6000
140isa_conflict { "-march=r4010 -32" "-march=r4650 -32" } 4010 4650
141isa_conflict { "-mips3 -mgp32 -32" "-mips32 -32" } 4000 isa32
142isa_conflict { "-march=sb1 -mgp32 -32" "-mips32r2 -32" } sb1 isa32r2
143isa_conflict { "-march=sb1 -32" "-mips64r2 -32" } sb1 isa64r2
144
145regsize_conflict { "-mips4 -mgp64 -mabi=o64" "-mips2 -32" }
146regsize_conflict { "-mips4 -mabi=o64" "-mips4 -mabi=32" }
147regsize_conflict { "-mips4 -mabi=eabi -mgp32" "-mips4 -mabi=eabi -mgp64" }
148regsize_conflict { "-march=vr5000 -mgp64 -mabi=o64" "-march=vr5000 -mgp32 -32" }
149regsize_conflict { "-mips32 -32" "-mips64 -mabi=o64" }
150regsize_conflict { "-mips32r2 -32" "-mips64 -mabi=o64" }
151regsize_conflict { "-mips32r2 -32" "-mips64r2 -mabi=o64" }
152
153good_combination { "-mips4 -mgp32 -32" "-mips2 -32" } { mips4 o32 }
154good_combination { "-mips4 -mabi=32" "-mips2 -32" } { mips4 o32 }
155good_combination { "-mips2 -32" "-mips4 -mabi=32" } { mips4 o32 }
156good_combination { "-mips2 -mabi=eabi" "-mips4 -mabi=eabi -mgp32" } { mips4 eabi32 }
157good_combination { "-mips2 -32" "-mips32 -32" "-mips32r2 -32" } { mips32r2 }
158good_combination { "-mips1 -32" "-mips32r2 -32" "-mips32 -32" } { mips32r2 }
159
160good_combination { "-march=vr4100 -32" "-march=vr4120 -32" } { 4120 }
161good_combination { "-march=vr5400 -32" "-march=vr5500 -32" "-mips4 -32" } { 5500 }
162good_combination { "-mips3 -32" "-mips4 -32" "-march=sb1 -32" "-mips5 -32" } { sb1 }
163good_combination { "-mips1 -32" "-march=3900 -32" } { 3900 }
164good_combination { "-mips3 -32" "-mips64r2 -32" "-mips64 -32" } { mips64r2 }
165
166good_combination { "-march=vr4120 -mabi=32" "-mips3 -mabi=32" } { 4120 o32 }
167good_combination { "-march=sb1 -mgp32 -32" "-march=4000 -mgp32 -32" } { sb1 o32 }
168good_combination { "-mips32 -mabi=32" "-march=sb1 -mabi=32" } { sb1 o32 }
169good_combination { "-mips64r2 -mabi=32" "-mips32 -mabi=32" } { mips64r2 o32 }
170good_combination { "-mips5 -mabi=o64" "-mips64r2 -mabi=o64" } { mips64r2 o64 }
171