1 %************************************************************************
3 \section[Driver-asm-fiddling]{Fiddling with assembler files}
5 %************************************************************************
10 Utterly stomp out C functions' prologues and epilogues; i.e., the
11 stuff to do with the C stack.
13 Any other required tidying up.
16 General note [chak]: Many regexps are very fragile because they rely on white
17 space being in the right place. This caused trouble with gcc 2.95 (at least
18 on Linux), where the use of white space in .s files generated by gcc suddenly
19 changed. To guarantee compatibility across different versions of gcc, make
20 sure (at least on i386-.*-linux) that regexps tolerate varying amounts of white
21 space between an assembler statement and its arguments as well as after a the
22 comma separating multiple arguments.
24 \emph{For the time being, I have corrected the regexps for i386-.*-linux. I
25 didn't touch all the regexps for other i386 platforms, as I don't have
26 a box to test these changes.}
31 The HP linker is very picky about symbols being in the appropriate
32 space (code vs. data). When we mangle the threaded code to put the
33 info tables just prior to the code, they wind up in code space
34 rather than data space. This means that references to *_info from
35 un-mangled parts of the RTS (e.g. unthreaded GC code) get
36 unresolved symbols. Solution: mini-mangler for .c files on HP. I
37 think this should really be triggered in the driver by a new -rts
38 option, so that user code doesn't get mangled inappropriately.
40 With reversed tables, jumps are to the _info label rather than to
41 the _entry label. The _info label is just an address in code
42 space, rather than an entry point with the descriptive blob we
43 talked about yesterday. As a result, you can't use the call-style
44 JMP_ macro. However, some JMP_ macros take _info labels as targets
45 and some take code entry points within the RTS. The latter won't
46 work with the goto-style JMP_ macro. Sigh. Solution: Use the goto
47 style JMP_ macro, and mangle some more assembly, changing all
48 "RP'literal" and "LP'literal" references to "R'literal" and
49 "L'literal," so that you get the real address of the code, rather
50 than the descriptive blob. Also change all ".word P%literal"
51 entries in info tables and vector tables to just ".word literal,"
52 for the same reason. Advantage: No more ridiculous call sequences.
55 %************************************************************************
57 \subsection{Top-level code}
59 %************************************************************************
62 $TargetPlatform = $TARGETPLATFORM;
64 ($Pgm = $0) =~ s|.*/||;
68 if ( $TargetPlatform =~ /^i386-/ ) {
72 $StolenX86Regs = $ARGV[2];
76 &mangle_asm($ifile,$ofile);
81 %************************************************************************
83 \subsection{Constants for various architectures}
85 %************************************************************************
88 sub init_TARGET_STUFF {
90 #--------------------------------------------------------#
91 if ( $TargetPlatform =~ /^alpha-.*-.*/ ) {
93 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
94 $T_US = ''; # _ if symbols have an underscore on the front
95 $T_PRE_APP = 'DONT THINK THIS APPLIES'; # regexp that says what comes before APP/NO_APP
96 $T_CONST_LBL = '^\$L?C(\d+):$'; # regexp for what such a lbl looks like
99 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.(globl|ent)\s+\S+|\#.*|\.(file|loc)\s+\S+\s+\S+|\.text|\.r?data)\n)';
100 $T_COPY_DIRVS = '^\s*(\#|\.(file|globl|ent|loc))';
102 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
103 $T_DOT_WORD = '\.(long|quad|byte|word)';
104 $T_DOT_GLOBAL = '^\t\.globl';
105 $T_HDR_literal = "\.rdata\n\t\.align 3\n";
106 $T_HDR_misc = "\.text\n\t\.align 3\n";
107 $T_HDR_data = "\.data\n\t\.align 3\n";
108 $T_HDR_consist = "\.text\n";
109 $T_HDR_closure = "\.data\n\t\.align 3\n";
110 $T_HDR_srt = "\.text\n\t\.align 3\n";
111 $T_HDR_info = "\.text\n\t\.align 3\n";
112 $T_HDR_entry = "\.text\n\t\.align 3\n";
113 $T_HDR_fast = "\.text\n\t\.align 3\n";
114 $T_HDR_vector = "\.text\n\t\.align 3\n";
115 $T_HDR_direct = "\.text\n\t\.align 3\n";
116 $T_create_word = "\t.quad";
118 #--------------------------------------------------------#
119 } elsif ( $TargetPlatform =~ /^hppa/ ) {
121 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
122 $T_US = ''; # _ if symbols have an underscore on the front
123 $T_PRE_APP = 'DONT THINK THIS APPLIES'; # regexp that says what comes before APP/NO_APP
124 $T_CONST_LBL = '^L\$C(\d+)$'; # regexp for what such a lbl looks like
127 $T_MOVE_DIRVS = '^((\s+\.(IMPORT|EXPORT|PARAM).*|\s+\.align\s+\d+|\s+\.(SPACE|SUBSPA)\s+\S+|\s*)\n)';
128 $T_COPY_DIRVS = '^\s+\.(IMPORT|EXPORT)';
130 $T_hsc_cc_PAT = '\.STRING.*\)(hsc|cc) (.*)\\\\x09(.*)\\\\x00"';
131 $T_DOT_WORD = '\.(blockz|word|half|byte)';
132 $T_DOT_GLOBAL = '^\s+\.EXPORT';
133 $T_HDR_literal = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$LIT\$\n";
134 $T_HDR_misc = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
135 $T_HDR_data = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
136 $T_HDR_consist = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$LIT\$\n";
137 $T_HDR_closure = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
138 $T_HDR_srt = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
139 $T_HDR_info = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
140 $T_HDR_entry = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
141 $T_HDR_fast = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
142 $T_HDR_vector = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
143 $T_HDR_direct = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
144 $T_create_word = "\t.word";
146 #--------------------------------------------------------#
147 } elsif ( $TargetPlatform =~ /^i386-.*-(linuxaout|freebsd2|openbsd|nextstep3|cygwin32|mingw32)$/ ) {
148 # NeXT added but not tested. CaS
150 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
151 $T_US = '_'; # _ if symbols have an underscore on the front
152 $T_PRE_APP = '^#'; # regexp that says what comes before APP/NO_APP
153 $T_CONST_LBL = '^LC(\d+):$';
155 $T_X86_PRE_LLBL_PAT = 'L';
156 $T_X86_PRE_LLBL = 'L';
157 $T_X86_BADJMP = '^\tjmp [^L\*]';
159 $T_MOVE_DIRVS = '^(\s*(\.(p2)?align\s+\d+(,0x90)?|\.globl\s+\S+|\.text|\.data|\.stab[^n].*|\.type\s+.*|\.size\s+.*)\n)';
160 $T_COPY_DIRVS = '\.(globl|stab)';
161 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
162 $T_DOT_WORD = '\.(long|word|value|byte|space)';
163 $T_DOT_GLOBAL = '\.globl';
164 $T_HDR_literal = "\.text\n\t\.align 2\n";
165 $T_HDR_misc = "\.text\n\t\.align 2,0x90\n";
166 $T_HDR_data = "\.data\n\t\.align 2\n";
167 $T_HDR_consist = "\.text\n";
168 $T_HDR_closure = "\.data\n\t\.align 2\n";
169 $T_HDR_closure = "\.data\n\t\.align 2\n\t.long 0\n" if ( $TargetPlatform =~ /.*-mingw32$/ );
170 $T_HDR_srt = "\.text\n\t\.align 2\n";
171 $T_HDR_info = "\.text\n\t\.align 2\n"; # NB: requires padding
172 $T_HDR_entry = "\.text\n"; # no .align so we're right next to _info (arguably wrong...?)
173 $T_HDR_fast = "\.text\n\t\.align 2,0x90\n";
174 $T_HDR_vector = "\.text\n\t\.align 2\n"; # NB: requires padding
175 $T_HDR_direct = "\.text\n\t\.align 2,0x90\n";
176 $T_create_word = "\t.word";
178 #--------------------------------------------------------#
179 } elsif ( $TargetPlatform =~ /^i386-.*-(solaris2|linux|freebsd|netbsd)$/ ) {
181 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
182 $T_US = ''; # _ if symbols have an underscore on the front
183 $T_PRE_APP = # regexp that says what comes before APP/NO_APP
184 ($TargetPlatform =~ /-(linux|freebsd|netbsd)$/) ? '#' : '/' ;
185 $T_CONST_LBL = '^\.LC(\d+):$'; # regexp for what such a lbl looks like
187 $T_X86_PRE_LLBL_PAT = '\.L';
188 $T_X86_PRE_LLBL = '.L';
189 $T_X86_BADJMP = '^\tjmp\s+[^\.\*]';
191 $T_MOVE_DIRVS = '^(\s*(\.(p2)?align\s+\d+(,\s*0x90)?|\.globl\s+\S+|\.text|\.data|\.section\s+.*|\.type\s+.*|\.Lfe.*\n\s*\.size\s+.*|\.size\s+.*|\.ident.*)\n)';
192 $T_COPY_DIRVS = '\.(globl)';
194 if ( $TargetPlatform =~ /freebsd|netbsd/ ) {
195 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
197 $T_hsc_cc_PAT = '\.string.*\)(hsc|cc) (.*)\\\\t(.*)"';
200 $T_DOT_WORD = '\.(long|value|byte|zero)';
201 $T_DOT_GLOBAL = '\.globl';
202 $T_HDR_literal = "\.section\t\.rodata\n"; # or just use .text??? (WDP 95/11)
203 $T_HDR_misc = "\.text\n\t\.align 4\n";
204 $T_HDR_data = "\.data\n\t\.align 4\n"; # ToDo: change align??
205 $T_HDR_consist = "\.text\n";
206 $T_HDR_closure = "\.data\n\t\.align 4\n"; # ToDo: change align?
207 $T_HDR_srt = "\.text\n\t\.align 4\n"; # ToDo: change align?
208 $T_HDR_info = "\.text\n\t\.align 4\n"; # NB: requires padding
209 $T_HDR_entry = "\.text\n"; # no .align so we're right next to _info (arguably wrong...?)
210 $T_HDR_fast = "\.text\n\t\.align 4\n";
211 $T_HDR_vector = "\.text\n\t\.align 4\n"; # NB: requires padding
212 $T_HDR_direct = "\.text\n\t\.align 4\n";
213 $T_create_word = "\t.word";
215 #--------------------------------------------------------#
216 } elsif ( $TargetPlatform =~ /^m68k-.*-sunos4/ ) {
218 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
219 $T_US = '_'; # _ if symbols have an underscore on the front
220 $T_PRE_APP = '^# MAY NOT APPLY'; # regexp that says what comes before APP/NO_APP
221 $T_CONST_LBL = '^LC(\d+):$';
224 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.proc\s+\d+|\.const|\.cstring|\.globl\s+\S+|\.text|\.data|\.even|\.stab[^n].*)\n)';
225 $T_COPY_DIRVS = '\.(globl|proc|stab)';
226 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
228 $T_DOT_WORD = '\.long';
229 $T_DOT_GLOBAL = '\.globl';
230 $T_HDR_literal = "\.text\n\t\.even\n";
231 $T_HDR_misc = "\.text\n\t\.even\n";
232 $T_HDR_data = "\.data\n\t\.even\n";
233 $T_HDR_consist = "\.text\n";
234 $T_HDR_closure = "\.data\n\t\.even\n";
235 $T_HDR_srt = "\.text\n\t\.even\n";
236 $T_HDR_info = "\.text\n\t\.even\n";
237 $T_HDR_entry = "\.text\n\t\.even\n";
238 $T_HDR_fast = "\.text\n\t\.even\n";
239 $T_HDR_vector = "\.text\n\t\.even\n";
240 $T_HDR_direct = "\.text\n\t\.even\n";
241 $T_create_word = "\t.long";
243 #--------------------------------------------------------#
244 } elsif ( $TargetPlatform =~ /^mips-.*/ ) {
246 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
247 $T_US = ''; # _ if symbols have an underscore on the front
248 $T_PRE_APP = '^\s*#'; # regexp that says what comes before APP/NO_APP
249 $T_CONST_LBL = '^\$LC(\d+):$'; # regexp for what such a lbl looks like
252 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.(globl|ent)\s+\S+|\.text|\.r?data)\n)';
253 $T_COPY_DIRVS = '\.(globl|ent)';
255 $T_hsc_cc_PAT = 'I WAS TOO LAZY TO DO THIS BIT (WDP 95/05)';
256 $T_DOT_WORD = '\.word';
257 $T_DOT_GLOBAL = '^\t\.globl';
258 $T_HDR_literal = "\t\.rdata\n\t\.align 2\n";
259 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
260 $T_HDR_data = "\t\.data\n\t\.align 2\n";
261 $T_HDR_consist = 'TOO LAZY TO DO THIS TOO';
262 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
263 $T_HDR_srt = "\t\.text\n\t\.align 2\n";
264 $T_HDR_info = "\t\.text\n\t\.align 2\n";
265 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
266 $T_HDR_fast = "\t\.text\n\t\.align 2\n";
267 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
268 $T_HDR_direct = "\t\.text\n\t\.align 2\n";
269 $T_create_word = "\t.word";
271 #--------------------------------------------------------#
272 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ ) {
273 # Apple PowerPC Darwin/MacOS X.
274 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
275 $T_US = '_'; # _ if symbols have an underscore on the front
276 $T_PRE_APP = 'WHAT IS THIS'; # regexp that says what comes before APP/NO_APP
277 $T_CONST_LBL = '^\LC\d+:'; # regexp for what such a lbl looks like
280 $T_MOVE_DIRVS = '^(\s*(\.align \d+|\.text|\.data|\.cstring|\.non_lazy_symbol_pointer|\.const|\.static_const|\.literal4|\.literal8|\.static_data|\.globl \S+)\n)';
281 $T_COPY_DIRVS = '\.(globl)';
283 $T_hsc_cc_PAT = '\.byte.*\)(hsc|cc) (.*)"\n\t\.byte \d+\n\t\.byte "(.*)"\n\t\.byte \d+';
284 $T_DOT_WORD = '\.(long|short|byte|fill|space)';
285 $T_DOT_GLOBAL = '\.globl';
286 $T_HDR_toc = "\.toc\n";
287 $T_HDR_literal = "\t\.const_data\n\t\.align 2\n";
288 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
289 $T_HDR_data = "\t\.data\n\t\.align 2\n";
290 $T_HDR_consist = "\t\.text\n\t\.align 2\n";
291 $T_HDR_closure = "\t\.const_data\n\t\.align 2\n";
292 $T_HDR_srt = "\t\.text\n\t\.align 2\n";
293 $T_HDR_info = "\t\.text\n\t\.align 2\n";
294 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
295 $T_HDR_fast = "\t\.text\n\t\.align 2\n";
296 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
297 $T_HDR_direct = "\t\.text\n\t\.align 2\n";
298 $T_create_word = "\t.long";
300 #--------------------------------------------------------#
301 } elsif ( $TargetPlatform =~ /^sparc-.*-solaris2/ ) {
303 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
304 $T_US = ''; # _ if symbols have an underscore on the front
305 $T_PRE_APP = 'DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
306 $T_CONST_LBL = '^\.LLC(\d+):$'; # regexp for what such a lbl looks like
309 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.stab.*|\.section.*|\s+\.type.*|\s+\.size.*)\n)';
310 $T_COPY_DIRVS = '\.(global|proc|stab)';
312 $T_hsc_cc_PAT = '\.asciz.*\)(hsc|cc) (.*)\\\\t(.*)"';
313 $T_DOT_WORD = '\.(word|byte|half|skip|uahalf|uaword)';
314 $T_DOT_GLOBAL = '^\t\.global';
315 $T_HDR_literal = "\.text\n\t\.align 8\n";
316 $T_HDR_misc = "\.text\n\t\.align 4\n";
317 $T_HDR_data = "\.data\n\t\.align 8\n";
318 $T_HDR_consist = "\.text\n";
319 $T_HDR_closure = "\.data\n\t\.align 4\n";
320 $T_HDR_srt = "\.data\n\t\.align 4\n";
321 $T_HDR_info = "\.text\n\t\.align 4\n";
322 $T_HDR_entry = "\.text\n\t\.align 4\n";
323 $T_HDR_fast = "\.text\n\t\.align 4\n";
324 $T_HDR_vector = "\.text\n\t\.align 4\n";
325 $T_HDR_direct = "\.text\n\t\.align 4\n";
326 $T_create_word = "\t.word";
328 #--------------------------------------------------------#
329 } elsif ( $TargetPlatform =~ /^sparc-.*-sunos4/ ) {
331 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
332 $T_US = '_'; # _ if symbols have an underscore on the front
333 $T_PRE_APP = '^# DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
334 $T_CONST_LBL = '^LC(\d+):$';
337 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.stab.*)\n)';
338 $T_COPY_DIRVS = '\.(global|proc|stab)';
339 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
341 $T_DOT_WORD = '\.word';
342 $T_DOT_GLOBAL = '^\t\.global';
343 $T_HDR_literal = "\.text\n\t\.align 8\n";
344 $T_HDR_misc = "\.text\n\t\.align 4\n";
345 $T_HDR_data = "\.data\n\t\.align 8\n";
346 $T_HDR_consist = "\.text\n";
347 $T_HDR_closure = "\.data\n\t\.align 4\n";
348 $T_HDR_srt = "\.data\n\t\.align 4\n";
349 $T_HDR_info = "\.text\n\t\.align 4\n";
350 $T_HDR_entry = "\.text\n\t\.align 4\n";
351 $T_HDR_fast = "\.text\n\t\.align 4\n";
352 $T_HDR_vector = "\.text\n\t\.align 4\n";
353 $T_HDR_direct = "\.text\n\t\.align 4\n";
354 $T_create_word = "\t.word";
356 #--------------------------------------------------------#
358 print STDERR "$Pgm: don't know how to mangle assembly language for: $TargetPlatform\n";
363 print STDERR "T_STABBY: $T_STABBY\n";
364 print STDERR "T_US: $T_US\n";
365 print STDERR "T_PRE_APP: $T_PRE_APP\n";
366 print STDERR "T_CONST_LBL: $T_CONST_LBL\n";
367 print STDERR "T_POST_LBL: $T_POST_LBL\n";
368 if ( $TargetPlatform =~ /^i386-/ ) {
369 print STDERR "T_X86_PRE_LLBL_PAT: $T_X86_PRE_LLBL_PAT\n";
370 print STDERR "T_X86_PRE_LLBL: $T_X86_PRE_LLBL\n";
371 print STDERR "T_X86_BADJMP: $T_X86_BADJMP\n";
373 print STDERR "T_MOVE_DIRVS: $T_MOVE_DIRVS\n";
374 print STDERR "T_COPY_DIRVS: $T_COPY_DIRVS\n";
375 print STDERR "T_hsc_cc_PAT: $T_hsc_cc_PAT\n";
376 print STDERR "T_DOT_WORD: $T_DOT_WORD\n";
377 print STDERR "T_HDR_literal: $T_HDR_literal\n";
378 print STDERR "T_HDR_misc: $T_HDR_misc\n";
379 print STDERR "T_HDR_data: $T_HDR_data\n";
380 print STDERR "T_HDR_consist: $T_HDR_consist\n";
381 print STDERR "T_HDR_closure: $T_HDR_closure\n";
382 print STDERR "T_HDR_info: $T_HDR_info\n";
383 print STDERR "T_HDR_entry: $T_HDR_entry\n";
384 print STDERR "T_HDR_fast: $T_HDR_fast\n";
385 print STDERR "T_HDR_vector: $T_HDR_vector\n";
386 print STDERR "T_HDR_direct: $T_HDR_direct\n";
392 %************************************************************************
394 \subsection{Mangle away}
396 %************************************************************************
400 local($in_asmf, $out_asmf) = @_;
402 # multi-line regexp matching:
407 &init_TARGET_STUFF();
408 &init_FUNNY_THINGS();
410 open(INASM, "< $in_asmf")
411 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
412 open(OUTASM,"> $out_asmf")
413 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
415 # read whole file, divide into "chunks":
416 # record some info about what we've found...
418 @chk = (); # contents of the chunk
419 $numchks = 0; # number of them
420 @chkcat = (); # what category of thing in each chunk
421 @chksymb = (); # what symbol(base) is defined in this chunk
422 %slowchk = (); # ditto, its regular "slow" entry code
423 %fastchk = (); # ditto, fast entry code
424 %closurechk = (); # ditto, the (static) closure
425 %srtchk = (); # ditto, its SRT (for top-level things)
426 %infochk = (); # given a symbol base, say what chunk its info tbl is in
427 %vectorchk = (); # ditto, return vector table
428 $EXTERN_DECLS = ''; # .globl <foo> .text (MIPS only)
430 $i = 0; $chkcat[0] = 'misc'; $chk[0] = '';
433 tr/\r//d if $TargetPlatform =~ /-mingw32$/; # In case Perl doesn't convert line endings
434 next if $T_STABBY && /^\.stab.*${T_US}__stg_split_marker/o;
435 next if $T_STABBY && /^\.stab.*ghc.*c_ID/;
436 next if /^\t\.def.*endef$/;
437 next if /${T_PRE_APP}(NO_)?APP/o;
438 next if /^;/ && $TargetPlatform =~ /^hppa/;
440 next if /(^$|^\t\.file\t|^ # )/ && $TargetPlatform =~ /^(mips)-/;
442 if ( $TargetPlatform =~ /^mips-/
443 && /^\t\.(globl\S+\.text|comm\t)/ ) {
444 $EXTERN_DECLS .= $_ unless /(__DISCARD__|\b(PK_|ASSIGN_)(FLT|DBL)\b)/;
446 # As a temporary solution for compiling "foreign export" declarations,
447 # we use global variables to pass arguments from C to STG land.
448 # These declarations live in the .hc file and not in the generated C
449 # stub file, so we let them pass through here.
450 } elsif ( /^\t\.comm\t__fexp_.*$/ ) {
452 $chkcat[$i] = 'data';
455 } elsif ( /^\s+/ ) { # most common case first -- a simple line!
456 # duplicated from the bottom
460 } elsif ( /\.\.ng:$/ && $TargetPlatform =~ /^alpha-/ ) {
461 # Alphas: Local labels not to be confused with new chunks
464 # NB: all the rest start with a non-space
466 } elsif ( $TargetPlatform =~ /^mips-/
467 && /^\d+:/ ) { # a funny-looking very-local label
470 } elsif ( /$T_CONST_LBL/o ) {
472 $chkcat[$i] = 'literal';
475 } elsif ( /^${T_US}__stg_split_marker(\d*)${T_POST_LBL}$/o ) {
477 $chkcat[$i] = 'splitmarker';
480 } elsif ( /^${T_US}([A-Za-z0-9_]+)_info${T_POST_LBL}$/o ) {
483 $chkcat[$i] = 'infotbl';
484 $chksymb[$i] = $symb;
486 die "Info table already? $symb; $i\n" if defined($infochk{$symb});
488 $infochk{$symb} = $i;
490 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(entry|ret)${T_POST_LBL}$/o ) {
492 $chkcat[$i] = 'slow';
497 } elsif ( /^${T_US}([A-Za-z0-9_]+)_fast\d*${T_POST_LBL}$/o ) {
499 $chkcat[$i] = 'fast';
504 } elsif ( /^${T_US}([A-Za-z0-9_]+)_closure${T_POST_LBL}$/o ) {
506 $chkcat[$i] = 'closure';
509 $closurechk{$1} = $i;
511 } elsif ( /^${T_US}([A-Za-z0-9_]+)_srt${T_POST_LBL}$/o ) {
518 } elsif ( /^${T_US}([A-Za-z0-9_]+)_ct${T_POST_LBL}$/o ) {
520 $chkcat[$i] = 'data';
523 } elsif ( /^${T_US}ghc.*c_ID${T_POST_LBL}/o ) {
525 $chkcat[$i] = 'consist';
527 } elsif ( /^(${T_US}__gnu_compiled_c|gcc2_compiled\.)${T_POST_LBL}/o ) {
530 } elsif ( /^${T_US}[A-Za-z0-9_]+\.\d+${T_POST_LBL}$/o
531 || /^${T_US}.*_CAT${T_POST_LBL}$/o # PROF: _entryname_CAT
532 || /^${T_US}.*_done${T_POST_LBL}$/o # PROF: _module_done
533 || /^${T_US}_module_registered${T_POST_LBL}$/o # PROF: _module_registered
536 $chkcat[$i] = 'data';
539 } elsif ( /^([A-Za-z0-9_]+)\s+\.comm/ && $TargetPlatform =~ /^hppa/ ) {
544 } elsif ( /^${T_US}([A-Za-z0-9_]+)_cc(s)?${T_POST_LBL}$/o ) {
545 # all CC_ symbols go in the data section...
547 $chkcat[$i] = 'data';
550 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(alt|dflt)${T_POST_LBL}$/o ) {
552 $chkcat[$i] = 'misc';
554 } elsif ( /^${T_US}([A-Za-z0-9_]+)_vtbl${T_POST_LBL}$/o ) {
556 $chkcat[$i] = 'vector';
561 # As a temporary solution for compiling "foreign export" declarations,
562 # we use global variables to pass arguments from C to STG land.
563 # These declarations live in the .hc file and not in the generated C
564 # stub file, so we let them pass through here.
565 } elsif ( /^[\t ]+\.comm[\t ]+__fexp_.*$/ ) {
567 $chkcat[$i] = 'data';
570 } elsif ( $TargetPlatform =~ /^i386-.*-solaris2/
571 && /^[A-Za-z0-9][A-Za-z0-9_]*:/ ) {
572 # Some Solaris system headers contain function definitions (as
573 # opposed to mere prototypes), which end up in the .hc file when
574 # a Haskell module foreign imports the corresponding system
575 # functions (most notably stat()). We put them into the text
576 # segment. Note that this currently does not extend to function
577 # names starting with an underscore.
580 $chkcat[$i] = 'misc';
583 } elsif ( /^${T_US}[A-Za-z0-9_]/o
584 && ( $TargetPlatform !~ /^hppa/ # need to avoid local labels in this case
585 || ! /^L\$\d+$/ ) ) {
588 print STDERR "Funny global thing?: $_"
589 unless # $KNOWN_FUNNY_THING{$thing}
590 /^${T_US}stg_.*${T_POST_LBL}$/o # RTS internals
591 || /^${T_US}__stg_.*${T_POST_LBL}$/o # more RTS internals
592 || /^${T_US}__fexp_.*${T_POST_LBL}$/o # foreign export
593 || /^${T_US}__stginit.*${T_POST_LBL}$/o # __stginit<module>
594 || /^${T_US}.*_btm${T_POST_LBL}$/o # large bitmaps
595 || /^${T_US}.*_closure_tbl${T_POST_LBL}$/o # closure tables
596 || /^_uname:/o; # x86/Solaris2
598 $chkcat[$i] = 'misc';
601 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && /^\.picsymbol_stub/ )
604 $chkcat[$i] = 'dyld';
606 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && /^\.lazy_symbol_pointer/ )
609 $chkcat[$i] = 'dyld';
611 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && /^\.non_lazy_symbol_pointer/ )
614 $chkcat[$i] = 'dyld';
616 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && /^\.data/ && $chkcat[$i] == 'dyld')
617 { # non_lazy_symbol_ptrs that point to local symbols
619 $chkcat[$i] = 'dyld';
621 } else { # simple line (duplicated at the top)
626 $numchks = $#chk + 1;
628 # open CHUNKS, ">/tmp/chunks1" or die "Cannot open /tmp/chunks1: $!\n";
629 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
632 # the division into chunks is imperfect;
633 # we throw some things over the fence into the next
636 # also, there are things we would like to know
637 # about the whole module before we start spitting
640 local($FIRST_MANGLABLE) = ($TargetPlatform =~ /^(alpha-|hppa|mips-)/) ? 1 : 0;
641 local($FIRST_TOSSABLE ) = ($TargetPlatform =~ /^(hppa|mips-)/) ? 1 : 0;
643 # print STDERR "first chunk to mangle: $FIRST_MANGLABLE\n";
645 # Alphas: NB: we start meddling at chunk 1, not chunk 0
646 # The first ".rdata" is quite magical; as of GCC 2.7.x, it
647 # spits a ".quad 0" in after the very first ".rdata"; we
648 # detect this special case (tossing the ".quad 0")!
649 local($magic_rdata_seen) = 0;
651 # HPPAs, MIPSen: also start medding at chunk 1
653 for ($i = $FIRST_TOSSABLE; $i < $numchks; $i++) {
654 $c = $chk[$i]; # convenience copy
656 # print STDERR "\nCHK $i (BEFORE) (",$chkcat[$i],"):\n", $c;
658 # toss all prologue stuff; HPPA is pretty weird
660 $c = &mash_hppa_prologue($c) if $TargetPlatform =~ /^hppa/;
662 # be slightly paranoid to make sure there's
663 # nothing surprising in there
664 if ( $c =~ /--- BEGIN ---/ ) {
665 if (($p, $r) = split(/--- BEGIN ---/, $c)) {
667 # remove junk whitespace around the split point
671 if ($TargetPlatform =~ /^i386-/) {
672 $p =~ s/^\tpushl\s+\%edi\n//;
673 $p =~ s/^\tpushl\s+\%esi\n//;
674 $p =~ s/^\tpushl\s+\%ebx\n//;
675 $p =~ s/^\tsubl\s+\$\d+,\s*\%esp\n//;
676 $p =~ s/^\tmovl\s+\$\d+,\s*\%eax\n\tcall\s+__alloca\n// if ($TargetPlatform =~ /^.*-cygwin32/);
678 # GCC 3.1 is in the habit of adding spurious writes to the
679 # stack in the prologue. Just to be on the safe side,
680 # chuck these over the fence into the main code.
681 while ($p =~ /^\tmovl\s+(\$\d+|\%edi),\s*\d*\(\%esp\)\n/) {
682 # print "Spurious instruction: $&";
687 } elsif ($TargetPlatform =~ /^m68k-/) {
688 $p =~ s/^\tlink a6,#-?\d.*\n//;
689 $p =~ s/^\tpea a6@\n\tmovel sp,a6\n//;
690 # The above showed up in the asm code,
691 # so I added it here.
692 # I hope it's correct.
694 $p =~ s/^\tmovel d2,sp\@-\n//;
695 $p =~ s/^\tmovel d5,sp\@-\n//; # SMmark.* only?
696 $p =~ s/^\tmoveml \#0x[0-9a-f]+,sp\@-\n//; # SMmark.* only?
697 } elsif ($TargetPlatform =~ /^mips-/) {
698 # the .frame/.mask/.fmask that we use is the same
699 # as that produced by GCC for miniInterpret; this
700 # gives GDB some chance of figuring out what happened
701 $FRAME = "\t.frame\t\$sp,2168,\$31\n\t.mask\t0x90000000,-4\n\t.fmask\t0x00000000,0\n";
702 $p =~ s/^\t\.(frame).*\n/__FRAME__/g;
703 $p =~ s/^\t\.(mask|fmask).*\n//g;
704 $p =~ s/^\t\.cprestore.*\n/\t\.cprestore 416\n/; # 16 + 100 4-byte args
705 $p =~ s/^\tsubu\t\$sp,\$sp,\d+\n//;
706 $p =~ s/^\tsw\t\$31,\d+\(\$sp\)\n//;
707 $p =~ s/^\tsw\t\$fp,\d+\(\$sp\)\n//;
708 $p =~ s/^\tsw\t\$28,\d+\(\$sp\)\n//;
709 $p =~ s/__FRAME__/$FRAME/;
710 } elsif ($TargetPlatform =~ /^powerpc-apple-.*/) {
712 $pcrel_label =~ s/(.|\n)*^(L\d+\$pb):\n(.|\n)*/$2/ or $pcrel_label = "";
714 $p =~ s/^\tmflr r0\n//;
715 $p =~ s/^\tbl saveFP # f\d+\n//;
716 $p =~ s/^\tbl saveFP ; save f\d+-f\d+\n//;
717 $p =~ s/^L\d+\$pb:\n//;
718 $p =~ s/^\tstmw r\d+,-\d+\(r1\)\n//;
719 $p =~ s/^\tstfd f\d+,-\d+\(r1\)\n//g;
720 $p =~ s/^\tstw r0,\d+\(r1\)\n//g;
721 $p =~ s/^\tstwu r1,-\d+\(r1\)\n//;
722 $p =~ s/^\tstw r\d+,-\d+\(r1\)\n//g;
723 $p =~ s/^\tbcl 20,31,L\d+\$pb\n//;
724 $p =~ s/^L\d+\$pb:\n//;
725 $p =~ s/^\tmflr r31\n//;
727 print STDERR "$Pgm: unknown prologue mangling? $TargetPlatform\n";
730 # HWL HACK: dont die, just print a warning
731 #print stderr "HWL: this should die! Prologue junk?: $p\n" if $p =~ /^\t[^\.]/;
732 die "Prologue junk?: $p\n" if $p =~ /^\t[^\.]/;
734 if ($TargetPlatform =~ /^powerpc-apple-.*/ && $pcrel_label ne "") {
735 # on PowerPC, we have to keep a part of the prologue
736 # (which loads the current instruction pointer into register r31)
737 $p .= "bcl 20,31,$pcrel_label\n";
738 $p .= "$pcrel_label:\n";
742 # glue together what's left
747 if ( $TargetPlatform =~ /^mips-/ ) {
748 # MIPS: first, this basic sequence may occur "--- END ---" or not
749 $c =~ s/^\tlw\t\$31,\d+\(\$sp\)\n\taddu\t\$sp,\$sp,\d+\n\tj\t\$31\n\t\.end/\t\.end/;
752 # toss all epilogue stuff; again, paranoidly
753 if ( $c =~ /--- END ---/ ) {
754 if (($r, $e) = split(/--- END ---/, $c)) {
755 if ($TargetPlatform =~ /^i386-/) {
757 $e =~ s/^\tpopl\s+\%edi\n//;
758 $e =~ s/^\tpopl\s+\%esi\n//;
759 $e =~ s/^\tpopl\s+\%edx\n//;
760 $e =~ s/^\tpopl\s+\%ecx\n//;
761 $e =~ s/^\taddl\s+\$\d+,\s*\%esp\n//;
762 $e =~ s/^\tsubl\s+\$-\d+,\s*\%esp\n//;
763 } elsif ($TargetPlatform =~ /^m68k-/) {
764 $e =~ s/^\tunlk a6\n//;
766 } elsif ($TargetPlatform =~ /^mips-/) {
767 $e =~ s/^\tlw\t\$31,\d+\(\$sp\)\n//;
768 $e =~ s/^\tlw\t\$fp,\d+\(\$sp\)\n//;
769 $e =~ s/^\taddu\t\$sp,\$sp,\d+\n//;
770 $e =~ s/^\tj\t\$31\n//;
771 } elsif ($TargetPlatform =~ /^powerpc-apple-.*/) {
772 $e =~ s/^\taddi r1,r1,\d+\n//;
773 $e =~ s/^\tcal r1,\d+\(r1\)\n//;
774 $e =~ s/^\tlw?z? r\d+,\d+\(r1\)\n//;
775 $e =~ s/^\tmtlr r0\n//;
778 print STDERR "$Pgm: unknown epilogue mangling? $TargetPlatform\n";
781 print STDERR "WARNING: Epilogue junk?: $e\n" if $e =~ /^\t\s*[^\.\s\n]/;
783 # glue together what's left
785 $c =~ s/\n\t\n/\n/; # junk blank line
789 # On SPARCs, we don't do --- BEGIN/END ---, we just
790 # toss the register-windowing save/restore/ret* instructions
792 if ( $TargetPlatform =~ /^sparc-/ ) {
793 $c =~ s/^\t(save.*|restore|ret|retl)\n//g;
794 # throw away PROLOGUE comments
795 $c =~ s/^\t!#PROLOGUE# 0\n\t!#PROLOGUE# 1\n//;
798 # On Alphas, the prologue mangling is done a little later (below)
800 # toss all calls to __DISCARD__
801 $c =~ s/^\t(call|jbsr|jal)\s+${T_US}__DISCARD__\n//go;
802 $c =~ s/^\tbl\s+L___DISCARD__\$stub\n//go if $TargetPlatform =~ /^powerpc-apple-.*/;
804 # MIPS: that may leave some gratuitous asm macros around
805 # (no harm done; but we get rid of them to be tidier)
806 $c =~ s/^\t\.set\tnoreorder\n\t\.set\tnomacro\n\taddu\t(\S+)\n\t\.set\tmacro\n\t\.set\treorder\n/\taddu\t$1\n/
807 if $TargetPlatform =~ /^mips-/;
809 # toss stack adjustment after DoSparks
810 $c =~ s/^(\tjbsr _DoSparks\n)\taddqw #8,sp/$1/g
811 if $TargetPlatform =~ /^m68k-/; # this looks old...
813 if ( $TargetPlatform =~ /^alpha-/ &&
814 ! $magic_rdata_seen &&
815 $c =~ /^\s*\.rdata\n\t\.quad 0\n\t\.align \d\n/ ) {
816 $c =~ s/^\s*\.rdata\n\t\.quad 0\n\t\.align (\d)\n/\.rdata\n\t\.align $1\n/;
817 $magic_rdata_seen = 1;
820 # pick some end-things and move them to the next chunk
822 # pin a funny end-thing on (for easier matching):
823 $c .= 'FUNNY#END#THING';
825 while ( $c =~ /${T_MOVE_DIRVS}FUNNY#END#THING/o ) {
829 # on x86 we try not to copy any directives into a literal
830 # chunk, rather we keep looking for the next real chunk. This
831 # is because we get things like
833 # .globl blah_closure
839 if ( $TargetPlatform =~ /^(i386|sparc)/ && $to_move =~ /${T_COPY_DIRVS}/ ) {
841 while ( $j < $numchks && $chk[$j] =~ /$T_CONST_LBL/) {
844 if ( $j < $numchks ) {
845 $chk[$j] = $to_move . $chk[$j];
849 elsif ( $i < ($numchks - 1)
850 && ( $to_move =~ /${T_COPY_DIRVS}/
851 || ($TargetPlatform =~ /^hppa/ && $to_move =~ /align/ && $chkcat[$i+1] eq 'literal') )) {
852 $chk[$i + 1] = $to_move . $chk[$i + 1];
853 # otherwise they're tossed
856 $c =~ s/${T_MOVE_DIRVS}FUNNY#END#THING/FUNNY#END#THING/o;
859 if ( $TargetPlatform =~ /^alpha-/ && $c =~ /^\t\.ent\s+(\S+)/ ) {
861 # toss all prologue stuff, except for loading gp, and the ..ng address
862 if (($p, $r) = split(/^\t\.prologue/, $c)) {
863 if (($keep, $junk) = split(/\.\.ng:/, $p)) {
864 $keep =~ s/^\t\.frame.*\n/\t.frame \$30,0,\$26,0\n/;
865 $keep =~ s/^\t\.(mask|fmask).*\n//g;
866 $c = $keep . "..ng:\n";
868 print STDERR "malformed code block ($ent)?\n"
871 $c .= "\t.prologue" . $r;
874 $c =~ s/FUNNY#END#THING//;
876 # print STDERR "\nCHK $i (AFTER) (",$chkcat[$i],"):\n", $c;
878 $chk[$i] = $c; # update w/ convenience copy
881 # open CHUNKS, ">/tmp/chunks2" or die "Cannot open /tmp/chunks2: $!\n";
882 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
885 if ( $TargetPlatform =~ /^alpha-/ ) {
886 # print out the header stuff first
887 $chk[0] =~ s/^(\t\.file.*)"(ghc\d+\.c)"/$1"$ifile_root.hc"/;
888 print OUTASM $chk[0];
890 } elsif ( $TargetPlatform =~ /^hppa/ ) {
891 print OUTASM $chk[0];
893 } elsif ( $TargetPlatform =~ /^mips-/ ) {
894 $chk[0] = "\t\.file\t1 \"$ifile_root.hc\"\n" . $chk[0];
896 # get rid of horrible "<dollar>Revision: .*$" strings
897 local(@lines0) = split(/\n/, $chk[0]);
899 while ( $z <= $#lines0 ) {
900 if ( $lines0[$z] =~ /^\t\.byte\t0x24,0x52,0x65,0x76,0x69,0x73,0x69,0x6f$/ ) {
903 while ( $z <= $#lines0 ) {
905 last if $lines0[$z] =~ /[,\t]0x0$/;
911 $chk[0] = join("\n", @lines0);
912 $chk[0] =~ s/\n\n+/\n/;
913 print OUTASM $chk[0];
916 # print out all the literal strings next
917 for ($i = 0; $i < $numchks; $i++) {
918 if ( $chkcat[$i] eq 'literal' ) {
919 print OUTASM $T_HDR_literal, $chk[$i];
920 print OUTASM "; end literal\n" if $TargetPlatform =~ /^hppa/; # for the splitter
922 $chkcat[$i] = 'DONE ALREADY';
926 # on the HPPA, print out all the bss next
927 if ( $TargetPlatform =~ /^hppa/ ) {
928 for ($i = 1; $i < $numchks; $i++) {
929 if ( $chkcat[$i] eq 'bss' ) {
930 print OUTASM "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$BSS\$\n\t.align 4\n";
931 print OUTASM $chk[$i];
933 $chkcat[$i] = 'DONE ALREADY';
938 for ($i = $FIRST_MANGLABLE; $i < $numchks; $i++) {
939 # print STDERR "$i: cat $chkcat[$i], symb $chksymb[$i]\n";
941 next if $chkcat[$i] eq 'DONE ALREADY';
943 if ( $chkcat[$i] eq 'misc' ) {
944 if ($chk[$i] ne '') {
945 print OUTASM $T_HDR_misc;
946 &print_doctored($chk[$i], 0);
949 } elsif ( $chkcat[$i] eq 'toss' ) {
950 print STDERR "*** NB: TOSSING code for $chksymb[$i] !!! ***\n";
952 } elsif ( $chkcat[$i] eq 'data' ) {
953 if ($chk[$i] ne '') {
954 print OUTASM $T_HDR_data;
955 print OUTASM $chk[$i];
958 } elsif ( $chkcat[$i] eq 'consist' ) {
959 if ( $chk[$i] =~ /$T_hsc_cc_PAT/o ) {
960 local($consist) = "$1.$2.$3";
962 $consist =~ s/\//./g;
964 $consist =~ s/[^A-Za-z0-9_.]/ZZ/g; # ToDo: properly?
966 # Using a cygnus-2.7-96q4 gcc build on hppas, the
967 # consistency chunk for ghc_cc_ID often (but not always!)
968 # gets lumped with a bunch of .IMPORT directives containing info on
969 # the code or data space nature of external symbols. We can't
970 # toss these, so once the consistency ID has been turned into
971 # a representable symbol, we substitute it for the symbol
972 # that the string was attached to in the first place (ghc_cc_ID.)
973 # (The original string is also substituted away.)
975 # This change may affect the code output on other platforms in
976 # adverse ways, hence we restrict this hack hppa targets only.
979 if ( $TargetPlatform =~ /^hppa/ ) {
980 $chk[$i] =~ s/^${T_US}ghc.*c_ID$TPOSTLBL/$consist/o;
981 $chk[$i] =~ s/\t$T_hsc_cc_PAT/$T_HDR_misc/o;
982 $consist = $chk[$i]; #clumsily
984 print OUTASM $T_HDR_consist, "${consist}${T_POST_LBL}\n";
986 } elsif ( $TargetPlatform !~ /^(mips)-/ ) { # we just don't try in those case (ToDo)
987 # on mips: consistency string is just a v
988 # horrible bunch of .bytes,
989 # which I am too lazy to sort out (WDP 95/05)
991 print STDERR "Couldn't grok consistency: ", $chk[$i];
994 } elsif ( $chkcat[$i] eq 'splitmarker' ) {
995 # we can just re-constitute this one...
996 # NB: we emit _three_ underscores no matter what,
997 # so ghc-split doesn't have to care.
998 print OUTASM "___stg_split_marker",$chksymb[$i],"${T_POST_LBL}\n";
1000 } elsif ( $chkcat[$i] eq 'closure'
1001 || $chkcat[$i] eq 'srt'
1002 || $chkcat[$i] eq 'infotbl'
1003 || $chkcat[$i] eq 'slow'
1004 || $chkcat[$i] eq 'fast' ) { # do them in that order
1005 $symb = $chksymb[$i];
1008 if ( defined($closurechk{$symb}) ) {
1009 print OUTASM $T_HDR_closure;
1010 print OUTASM $chk[$closurechk{$symb}];
1011 $chkcat[$closurechk{$symb}] = 'DONE ALREADY';
1015 if ( defined($srtchk{$symb}) ) {
1016 print OUTASM $T_HDR_srt;
1017 print OUTASM $chk[$srtchk{$symb}];
1018 $chkcat[$srtchk{$symb}] = 'DONE ALREADY';
1022 if ( defined($infochk{$symb}) ) {
1024 print OUTASM $T_HDR_info;
1025 print OUTASM &rev_tbl($symb, $chk[$infochk{$symb}], 1);
1027 # entry code will be put here!
1029 $chkcat[$infochk{$symb}] = 'DONE ALREADY';
1033 if ( defined($slowchk{$symb}) ) {
1035 # teach it to drop through to the fast entry point:
1036 $c = $chk[$slowchk{$symb}];
1038 if ( defined($fastchk{$symb}) ) {
1039 if ( $TargetPlatform =~ /^alpha-/ ) {
1040 $c =~ s/^\tjmp \$31,\(\$27\),0\n\t\.align 4\n\t\.end/\t.align 4\n\t.end/;
1041 } elsif ( $TargetPlatform =~ /^hppa/ ) {
1042 $c =~ s/^\s+ldil.*\n\s+ldo.*\n\s+bv.*\n(.*\n)?\s+\.EXIT/$1\t.EXIT/;
1043 } elsif ( $TargetPlatform =~ /^i386-/ ) {
1044 # Reg alloc depending, gcc generated code may jump to the fast entry point via
1045 # a number of registers.
1046 $c =~ s/^\tmovl\s+\$${T_US}${symb}_fast\d*,\s*\%edx\n\tjmp\s+\*\%edx\n//;
1047 $c =~ s/^\tmovl\s+\$${T_US}${symb}_fast\d*,\s*\%ecx\n\tjmp\s+\*\%ecx\n//;
1048 $c =~ s/^\tmovl\s+\$${T_US}${symb}_fast\d*,\s*\%eax\n\tjmp\s+\*\%eax\n//;
1049 # The next two only apply if we're not stealing %esi or %edi.
1050 $c =~ s/^\tmovl\s+\$${T_US}${symb}_fast\d*,\s*\%esi\n\tjmp\s+\*\%esi\n// if ($StolenX86Regs < 3);
1051 $c =~ s/^\tmovl\s+\$${T_US}${symb}_fast\d*,\s*\%edi\n\tjmp\s+\*\%edi\n// if ($StolenX86Regs < 4);
1052 } elsif ( $TargetPlatform =~ /^mips-/ ) {
1053 $c =~ s/^\tjmp \$31,\(\$27\),0\n\t\.align 4\n\t\.end/\t.align 4\n\t.end/;
1054 } elsif ( $TargetPlatform =~ /^m68k-/ ) {
1055 $c =~ s/^\tjmp ${T_US}${symb}_fast\d+.*\n\tnop\n//;
1056 $c =~ s/^\tjmp ${T_US}${symb}_fast\d+.*\n//;
1057 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ ) {
1058 $c =~ s/^\taddis r9,r31,ha16\(L_${symb}_fast\d*\$non_lazy_ptr-L\d+\$pb\)\n\tlwz r9,lo16\(L_${symb}_fast\d*\$non_lazy_ptr-L\d+\$pb\)\(r9\)\n\tmtctr r9\n\tbctr\n//;
1059 # addis r9,r31,ha16(L_XXXX_fast3$non_lazy_ptr-L32$pb)
1060 # lwz r9,lo16(L_XXXX_fast3$non_lazy_ptr-L32$pb)(r9)
1063 } elsif ( $TargetPlatform =~ /^sparc-/ ) {
1064 $c =~ s/^\tcall\s+${T_US}${symb}_fast\d+,.*\n\t\s*nop\n//;
1065 $c =~ s/^\tcall\s+${T_US}${symb}_fast\d+,.*\n(\t\s*[a-z].*\n)/$1/;
1067 print STDERR "$Pgm: mystery slow-fast dropthrough: $TargetPlatform\n";
1071 if ( $TargetPlatform !~ /^(alpha-|hppa|mips-|powerpc-apple-)/) {
1072 # On alphas, hppa: no very good way to look for "dangling"
1073 # references to fast-entry point.
1074 # (questionable re hppa and mips...)
1075 print STDERR "still has jump to fast entry point:\n$c"
1076 if $c =~ /\b${T_US}${symb}_fast/;
1079 print OUTASM $T_HDR_entry;
1081 &print_doctored($c, 1); # NB: the 1!!!
1083 $chkcat[$slowchk{$symb}] = 'DONE ALREADY';
1087 if ( defined($fastchk{$symb}) ) {
1088 $c = $chk[$fastchk{$symb}];
1089 if ( ! defined($slowchk{$symb})
1090 # ToDo: the || clause can go once we're no longer
1091 # concerned about producing exactly the same output as before
1092 #OLD: || $TargetPlatform =~ /^(m68k|sparc|i386)-/
1094 print OUTASM $T_HDR_fast;
1097 &print_doctored($c, 0);
1098 $chkcat[$fastchk{$symb}] = 'DONE ALREADY';
1101 } elsif ( $chkcat[$i] eq 'vector'
1102 || $chkcat[$i] eq 'direct' ) { # do them in that order
1103 $symb = $chksymb[$i];
1106 if ( defined($vectorchk{$symb}) ) {
1107 print OUTASM $T_HDR_vector;
1109 print OUTASM &rev_tbl($symb, $chk[$vectorchk{$symb}], 0);
1110 # DO NOT DELETE THE NEXT LINE. It fixes a rather subtle GC bug
1111 # which showed up as a segfault reported by Ryszard Kubiak.
1112 # Problem is with vector tables. They wind up as follows:
1114 # .word some-other-word
1116 # Problem is that we want the label fooble_vtbl to be considered
1117 # in the same section as the vtbl itself, but the label actually
1118 # lives at the next word along. If a data segment should happen
1119 # to immediately follow the vtbl, as it can in GHCi, the label will
1120 # be malclassified as in the data rather than text segment (during
1121 # GC), and so we will regard references to it as static closure
1122 # pointers rather than as code pointers, which is an error which
1123 # usually crashes the garbage collectors.
1124 # To fix this, we place a dummy word after the label, so as to
1125 # ensure that the label is in the same segment as the vtbl proper.
1126 # The native code generator has an analogous fix; see
1127 # ghc/compiler/nativeGen/AbsCStixGen.lhs line 107.
1128 print OUTASM "${T_create_word} 0\n";
1130 # direct return code will be put here!
1131 $chkcat[$vectorchk{$symb}] = 'DONE ALREADY';
1133 } elsif ( $TargetPlatform =~ /^alpha-/ ) {
1134 # Alphas: the commented nop is for the splitter, to ensure
1135 # that no module ends with a label as the very last
1136 # thing. (The linker will adjust the label to point
1137 # to the first code word of the next module linked in,
1138 # even if alignment constraints cause the label to move!)
1140 print OUTASM "\t# nop\n";
1143 } elsif ( $chkcat[$i] eq 'toc' ) {
1144 # silly optimisation to print tocs, since they come in groups...
1145 print OUTASM $T_HDR_toc;
1147 while ($chkcat[$j] eq 'toc')
1148 { if ( $chk[$j] !~ /\.tc UpdatePAP\[TC\]/ # not needed: always turned into a jump.
1151 print OUTASM $chk[$j];
1153 $chkcat[$j] = 'DONE ALREADY';
1157 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && $chkcat[$i] eq 'dyld' ) {
1158 # powerpc-apple: dynamic linker stubs
1159 if($chk[$i] !~ /\.indirect_symbol ___DISCARD__/)
1160 { # print them out unchanged, but remove the stubs for __DISCARD__
1161 print OUTASM $chk[$i];
1164 &tidy_up_and_die(1,"$Pgm: unknown chkcat (ghc-asm: $TargetPlatform)\n$chkcat[$i]\n$chk[$i]\n");
1168 print OUTASM $EXTERN_DECLS if $TargetPlatform =~ /^mips-/;
1171 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1172 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1177 sub mash_hppa_prologue { # OK, epilogue, too
1180 # toss all prologue stuff
1181 s/^\s+\.ENTRY[^\0]*--- BEGIN ---/\t.ENTRY/;
1183 # Lie about our .CALLINFO
1184 s/^\s+\.CALLINFO.*$/\t.CALLINFO NO_CALLS,NO_UNWIND/;
1191 # toss all epilogue stuff
1192 s/^\s+--- END ---[^\0]*\.EXIT/\t.EXIT/;
1194 # Sorry; we moved the _info stuff to the code segment.
1195 s/_info,DATA/_info,CODE/g;
1202 sub print_doctored {
1203 local($_, $need_fallthru_patch) = @_;
1205 if ( $TargetPlatform !~ /^i386-/
1206 || ! /^\t[a-z]/ # no instructions in here, apparently
1207 || /^${T_US}__stginit_[A-Za-z0-9_]+${T_POST_LBL}/) {
1211 # OK, must do some x86 **HACKING**
1213 local($entry_patch) = '';
1214 local($exit_patch) = '';
1216 # gotta watch out for weird instructions that
1217 # invisibly smash various regs:
1218 # rep* %ecx used for counting
1219 # scas* %edi used for destination index
1220 # cmps* %e[sd]i used for indices
1221 # loop* %ecx used for counting
1226 # * use of STG reg [ nn(%ebx) ] where no machine reg avail
1228 # * GCC used an "STG reg" for its own purposes
1230 # * some secret uses of machine reg, requiring STG reg
1231 # to be saved/restored
1233 # The most dangerous "GCC uses" of an "STG reg" are when
1234 # the reg holds the target of a jmp -- it's tricky to
1235 # insert the patch-up code before we get to the target!
1236 # So here we change the jmps:
1238 # --------------------------------------------------------
1239 # it can happen that we have jumps of the form...
1240 # jmp *<something involving %esp>
1242 # jmp <something involving another naughty register...>
1244 # a reasonably-common case is:
1246 # movl $_blah,<bad-reg>
1250 s/^\tmovl\s+\$${T_US}(.*),(\%e[abcd]x)\n\tjmp\s+\*\2/\tjmp $T_US$1/g;
1252 if ($StolenX86Regs <= 2 ) { # YURGH! spurious uses of esi?
1253 s/^\tmovl\s+(.*),\s*\%esi\n\tjmp\s+\*%esi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1254 s/^\tjmp\s+\*(.*\(.*\%esi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1255 s/^\tjmp\s+\*\%esi\n/\tmovl \%esi,\%eax\n\tjmp \*\%eax\n/g;
1256 die "$Pgm: (mangler) still have jump involving \%esi!\n$_"
1257 if /(jmp|call)\s+.*\%esi/;
1259 if ($StolenX86Regs <= 3 ) { # spurious uses of edi?
1260 s/^\tmovl\s+(.*),\s*\%edi\n\tjmp\s+\*%edi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1261 s/^\tjmp\s+\*(.*\(.*\%edi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1262 s/^\tjmp\s+\*\%edi\n/\tmovl \%edi,\%eax\n\tjmp \*\%eax\n/g;
1263 die "$Pgm: (mangler) still have jump involving \%edi!\n$_"
1264 if /(jmp|call)\s+.*\%edi/;
1267 # OK, now we can decide what our patch-up code is going to
1270 # Offsets into register table - you'd better update these magic
1271 # numbers should you change its contents!
1272 # local($OFFSET_R1)=0; No offset for R1 in new RTS.
1273 local($OFFSET_Hp)=92;
1275 # Note funky ".=" stuff; we're *adding* to these _patch guys
1276 if ( $StolenX86Regs <= 2
1277 && ( /[^0-9]\(\%ebx\)/ || /\%esi/ || /^\tcmps/ ) ) { # R1 (esi)
1278 $entry_patch .= "\tmovl \%esi,(\%ebx)\n";
1279 $exit_patch .= "\tmovl (\%ebx),\%esi\n";
1281 # nothing for call_{entry,exit} because %esi is callee-save
1283 if ( $StolenX86Regs <= 3
1284 && ( /${OFFSET_Hp}\(\%ebx\)/ || /\%edi/ || /^\t(scas|cmps)/ ) ) { # Hp (edi)
1285 $entry_patch .= "\tmovl \%edi,${OFFSET_Hp}(\%ebx)\n";
1286 $exit_patch .= "\tmovl ${OFFSET_Hp}(\%ebx),\%edi\n";
1288 # nothing for call_{entry,exit} because %edi is callee-save
1291 # --------------------------------------------------------
1292 # next, here we go with non-%esp patching!
1294 s/^(\t[a-z])/$entry_patch$1/; # before first instruction
1296 # Before calling GC we must set up the exit condition before the call
1297 # and entry condition when we come back
1299 # fix _all_ non-local jumps:
1301 s/^\tjmp\s+\*${T_X86_PRE_LLBL_PAT}/\tJMP___SL/go;
1302 s/^\tjmp\s+${T_X86_PRE_LLBL_PAT}/\tJMP___L/go;
1304 s/^(\tjmp\s+.*\n)/$exit_patch$1/g; # here's the fix...
1306 s/^\tJMP___SL/\tjmp \*${T_X86_PRE_LLBL}/go;
1307 s/^\tJMP___L/\tjmp ${T_X86_PRE_LLBL}/go;
1309 if ($StolenX86Regs == 2 ) {
1310 die "ARGH! Jump uses \%esi or \%edi with -monly-2-regs:\n$_"
1311 if /^\t(jmp|call)\s+.*\%e(si|di)/;
1312 } elsif ($StolenX86Regs == 3 ) {
1313 die "ARGH! Jump uses \%edi with -monly-3-regs:\n$_"
1314 if /^\t(jmp|call)\s+.*\%edi/;
1317 # --------------------------------------------------------
1318 # that's it -- print it
1320 #die "Funny jumps?\n$_" if /${T_X86_BADJMP}/o; # paranoia
1324 if ( $need_fallthru_patch ) { # exit patch for end of slow entry code
1325 print OUTASM $exit_patch;
1326 # ToDo: make it not print if there is a "jmp" at the end
1332 sub init_FUNNY_THINGS {
1333 %KNOWN_FUNNY_THING = (
1335 # "${T_US}stg_.*{T_POST_LBL}", 1,
1340 The following table reversal is used for both info tables and return
1341 vectors. In both cases, we remove the first entry from the table,
1342 reverse the table, put the label at the end, and paste some code
1343 (that which is normally referred to by the first entry in the table)
1344 right after the table itself. (The code pasting is done elsewhere.)
1348 local($symb, $tbl, $discard1) = @_;
1350 local($before) = '';
1352 local(@imports) = (); # hppa only
1355 local(@lines) = split(/\n/, $tbl);
1358 # Deal with the header...
1359 for ($i = 0; $i <= $#lines && $lines[$i] !~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1360 $label .= $lines[$i] . "\n",
1361 next if $lines[$i] =~ /^[A-Za-z0-9_]+_info${T_POST_LBL}$/o
1362 || $lines[$i] =~ /${T_DOT_GLOBAL}/o
1363 || $lines[$i] =~ /^${T_US}\S+_vtbl${T_POST_LBL}$/o;
1365 $before .= $lines[$i] . "\n"; # otherwise...
1368 # Grab the table data...
1369 if ( $TargetPlatform !~ /^hppa/ ) {
1370 for ( ; $i <= $#lines && $lines[$i] =~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1371 push(@words, $lines[$i]);
1373 } else { # hppa weirdness
1374 for ( ; $i <= $#lines && $lines[$i] =~ /^\s+(${T_DOT_WORD}|\.IMPORT)/; $i++) {
1375 if ($lines[$i] =~ /^\s+\.IMPORT/) {
1376 push(@imports, $lines[$i]);
1378 # We don't use HP's ``function pointers''
1379 # We just use labels in code space, like normal people
1380 $lines[$i] =~ s/P%//;
1381 push(@words, $lines[$i]);
1386 # now throw away the first word (SRT) iff it is empty.
1387 # The .zero business is for Linux/ELF.
1388 # The .skip business is for Sparc/Solaris/ELF.
1389 # The .blockz business is for HPPA.
1390 if ($discard1 && $words[0] =~ /^\t?(${T_DOT_WORD}\s+0|\.zero\s+4|\.skip\s+4|\.blockz\s+4)/) {
1394 for (; $i <= $#lines; $i++) {
1395 $after .= $lines[$i] . "\n";
1398 # Alphas: If we have anonymous text (not part of a procedure), the
1399 # linker may complain about missing exception information. Bleh.
1400 # To suppress this, we place a .ent/.end pair around the code.
1401 # At the same time, we have to be careful and not enclose any leading
1402 # .file/.loc directives.
1403 if ( $TargetPlatform =~ /^alpha-/ && $label =~ /^([A-Za-z0-9_]+):$/) {
1404 local ($ident) = $1;
1405 $before =~ s/^((\s*\.(file|loc)\s+[^\n]*\n)*)/$1\t.ent $ident\n/;
1406 $after .= "\t.end $ident\n";
1409 # Alphas: The heroic Simon Marlow found a bug in the Digital UNIX
1410 # assembler (!) wherein .quad constants inside .text sections are
1411 # first narrowed to 32 bits then sign-extended back to 64 bits.
1412 # This obviously screws up our 64-bit bitmaps, so we work around
1413 # the bug by replacing .quad with .align 3 + .long + .long [ccshan]
1414 if ( $TargetPlatform =~ /^alpha-/ ) {
1416 if (/^\s*\.quad\s+([-+0-9].*\S)\s*$/ && length $1 >= 10) {
1417 local ($number) = $1;
1418 if ($number =~ /^([-+])?(0x?)?([0-9]+)$/) {
1419 local ($sign, $base, $digits) = ($1, $2, $3);
1420 $base = (10, 8, 16)[length $base];
1421 local ($hi, $lo) = (0, 0);
1422 foreach $i (split(//, $digits)) {
1423 $j = $lo * $base + $i;
1424 $lo = $j % 4294967296;
1425 $hi = $hi * $base + ($j - $lo) / 4294967296;
1427 ($hi, $lo) = (4294967295 - $hi, 4294967296 - $lo)
1429 $_ = "\t.align 3\n\t.long $lo\n\t.long $hi\n";
1430 # printf STDERR "TURNING %s into 0x %08x %08x\n", $number, $hi, $lo;
1432 print STDERR "Cannot handle \".quad $number\" in info table\n";
1440 . (($TargetPlatform !~ /^hppa/) ? '' : join("\n", @imports) . "\n")
1441 . join("\n", @words) . "\n"
1444 # print STDERR "before=$before\n";
1445 # print STDERR "label=$label\n";
1446 # print STDERR "words=",(reverse @words),"\n";
1447 # print STDERR "after=$after\n";
1453 The HP is a major nuisance. The threaded code mangler moved info
1454 tables from data space to code space, but unthreaded code in the RTS
1455 still has references to info tables in data space. Since the HP
1456 linker is very precise about where symbols live, we need to patch the
1457 references in the unthreaded RTS as well.
1460 sub mini_mangle_asm_hppa {
1461 local($in_asmf, $out_asmf) = @_;
1463 open(INASM, "< $in_asmf")
1464 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
1465 open(OUTASM,"> $out_asmf")
1466 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
1469 s/_info,DATA/_info,CODE/; # Move _info references to code space
1475 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1476 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1482 sub tidy_up_and_die {
1483 local($return_val, $msg) = @_;
1485 exit (($return_val == 0) ? 0 : 1);