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)';
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 } else { # simple line (duplicated at the top)
606 $numchks = $#chk + 1;
608 open CHUNKS, ">/tmp/chunks1" or die "Cannot open /tmp/chunks1: $!\n";
609 for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
614 # the division into chunks is imperfect;
615 # we throw some things over the fence into the next
618 # also, there are things we would like to know
619 # about the whole module before we start spitting
622 local($FIRST_MANGLABLE) = ($TargetPlatform =~ /^(alpha-|hppa|mips-)/) ? 1 : 0;
623 local($FIRST_TOSSABLE ) = ($TargetPlatform =~ /^(hppa|mips-)/) ? 1 : 0;
625 # print STDERR "first chunk to mangle: $FIRST_MANGLABLE\n";
627 # Alphas: NB: we start meddling at chunk 1, not chunk 0
628 # The first ".rdata" is quite magical; as of GCC 2.7.x, it
629 # spits a ".quad 0" in after the very first ".rdata"; we
630 # detect this special case (tossing the ".quad 0")!
631 local($magic_rdata_seen) = 0;
633 # HPPAs, MIPSen: also start medding at chunk 1
635 for ($i = $FIRST_TOSSABLE; $i < $numchks; $i++) {
636 $c = $chk[$i]; # convenience copy
638 # print STDERR "\nCHK $i (BEFORE) (",$chkcat[$i],"):\n", $c;
640 # toss all prologue stuff; HPPA is pretty weird
642 $c = &mash_hppa_prologue($c) if $TargetPlatform =~ /^hppa/;
644 # be slightly paranoid to make sure there's
645 # nothing surprising in there
646 if ( $c =~ /--- BEGIN ---/ ) {
647 if (($p, $r) = split(/--- BEGIN ---/, $c)) {
649 if ($TargetPlatform =~ /^i386-/) {
650 $p =~ s/^\tpushl\s+\%edi\n//;
651 $p =~ s/^\tpushl\s+\%esi\n//;
652 $p =~ s/^\tpushl\s+\%ebx\n//;
653 $p =~ s/^\tsubl\s+\$\d+,\s*\%esp\n//;
654 $p =~ s/^\tmovl\s+\$\d+,\s*\%eax\n\tcall\s+__alloca\n// if ($TargetPlatform =~ /^.*-cygwin32/);
655 } elsif ($TargetPlatform =~ /^m68k-/) {
656 $p =~ s/^\tlink a6,#-?\d.*\n//;
657 $p =~ s/^\tpea a6@\n\tmovel sp,a6\n//;
658 # The above showed up in the asm code,
659 # so I added it here.
660 # I hope it's correct.
662 $p =~ s/^\tmovel d2,sp\@-\n//;
663 $p =~ s/^\tmovel d5,sp\@-\n//; # SMmark.* only?
664 $p =~ s/^\tmoveml \#0x[0-9a-f]+,sp\@-\n//; # SMmark.* only?
665 } elsif ($TargetPlatform =~ /^mips-/) {
666 # the .frame/.mask/.fmask that we use is the same
667 # as that produced by GCC for miniInterpret; this
668 # gives GDB some chance of figuring out what happened
669 $FRAME = "\t.frame\t\$sp,2168,\$31\n\t.mask\t0x90000000,-4\n\t.fmask\t0x00000000,0\n";
670 $p =~ s/^\t\.(frame).*\n/__FRAME__/g;
671 $p =~ s/^\t\.(mask|fmask).*\n//g;
672 $p =~ s/^\t\.cprestore.*\n/\t\.cprestore 416\n/; # 16 + 100 4-byte args
673 $p =~ s/^\tsubu\t\$sp,\$sp,\d+\n//;
674 $p =~ s/^\tsw\t\$31,\d+\(\$sp\)\n//;
675 $p =~ s/^\tsw\t\$fp,\d+\(\$sp\)\n//;
676 $p =~ s/^\tsw\t\$28,\d+\(\$sp\)\n//;
677 $p =~ s/__FRAME__/$FRAME/;
678 } elsif ($TargetPlatform =~ /^powerpc-apple-.*/) {
679 $p =~ s/^\tmflr r0\n//;
680 $p =~ s/^\tbl saveFP # f\d+\n//;
681 $p =~ s/^\tstmw r\d+,-\d+\(r1\)\n//;
682 $p =~ s/^\tstfd f\d+,-\d+\(r1\)\n//g;
683 $p =~ s/^\tstw r0,\d+\(r1\)\n//g;
684 $p =~ s/^\tstwu r1,-\d+\(r1\)\n//;
685 $p =~ s/^\tstw r\d+,-\d+\(r1\)\n//g;
687 print STDERR "$Pgm: unknown prologue mangling? $TargetPlatform\n";
690 if ($TargetPlatform =~ /^powerpc-apple-.*/) {
691 # on PowerPC, we have to keep a part of the prologue
692 # (which loads the current instruction pointer into register r31)
693 $u_p = $p; # $u_p is for unexpected prologue
694 $u_p =~ s/^\tbcl 20,31,L\d+\$pb\n//;
695 $u_p =~ s/^L\d+\$pb:\n//;
696 $u_p =~ s/^\tmflr r31\n//;
697 die "Prologue junk?: $u_p\n" if $u_p =~ /^\t[^\.]/
699 # HWL HACK: dont die, just print a warning
700 #print stderr "HWL: this should die! Prologue junk?: $p\n" if $p =~ /^\t[^\.]/;
701 die "Prologue junk?: $p\n" if $p =~ /^\t[^\.]/;
703 # glue together what's left
705 $c =~ s/\n\t\n/\n/; # junk blank line
709 if ( $TargetPlatform =~ /^mips-/ ) {
710 # MIPS: first, this basic sequence may occur "--- END ---" or not
711 $c =~ s/^\tlw\t\$31,\d+\(\$sp\)\n\taddu\t\$sp,\$sp,\d+\n\tj\t\$31\n\t\.end/\t\.end/;
714 # toss all epilogue stuff; again, paranoidly
715 if ( $c =~ /--- END ---/ ) {
716 if (($r, $e) = split(/--- END ---/, $c)) {
717 if ($TargetPlatform =~ /^i386-/) {
719 $e =~ s/^\tpopl\s+\%edi\n//;
720 $e =~ s/^\tpopl\s+\%esi\n//;
721 $e =~ s/^\tpopl\s+\%edx\n//;
722 $e =~ s/^\tpopl\s+\%ecx\n//;
723 $e =~ s/^\taddl\s+\$\d+,\s*\%esp\n//;
724 $e =~ s/^\tsubl\s+\$-\d+,\s*\%esp\n//;
725 } elsif ($TargetPlatform =~ /^m68k-/) {
726 $e =~ s/^\tunlk a6\n//;
728 } elsif ($TargetPlatform =~ /^mips-/) {
729 $e =~ s/^\tlw\t\$31,\d+\(\$sp\)\n//;
730 $e =~ s/^\tlw\t\$fp,\d+\(\$sp\)\n//;
731 $e =~ s/^\taddu\t\$sp,\$sp,\d+\n//;
732 $e =~ s/^\tj\t\$31\n//;
733 } elsif ($TargetPlatform =~ /^powerpc-apple-.*/) {
734 $e =~ s/^\taddi r1,r1,\d+\n//;
735 $e =~ s/^\tcal r1,\d+\(r1\)\n//;
736 $e =~ s/^\tlw?z? r\d+,\d+\(r1\)\n//;
737 $e =~ s/^\tmtlr r0\n//;
740 print STDERR "$Pgm: unknown epilogue mangling? $TargetPlatform\n";
743 print STDERR "WARNING: Epilogue junk?: $e\n" if $e =~ /^\t\s*[^\.\s\n]/;
745 # glue together what's left
747 $c =~ s/\n\t\n/\n/; # junk blank line
751 # On SPARCs, we don't do --- BEGIN/END ---, we just
752 # toss the register-windowing save/restore/ret* instructions
754 if ( $TargetPlatform =~ /^sparc-/ ) {
755 $c =~ s/^\t(save.*|restore|ret|retl)\n//g;
756 # throw away PROLOGUE comments
757 $c =~ s/^\t!#PROLOGUE# 0\n\t!#PROLOGUE# 1\n//;
760 # On Alphas, the prologue mangling is done a little later (below)
762 # toss all calls to __DISCARD__
763 $c =~ s/^\t(call|jbsr|jal)\s+${T_US}__DISCARD__\n//go;
764 # ###WTT### $c =~ s/^\tbl\s+L___DISCARD__\$stub\n//go if $TargetPlatform =~ /^powerpc-apple-.*/;
766 # MIPS: that may leave some gratuitous asm macros around
767 # (no harm done; but we get rid of them to be tidier)
768 $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/
769 if $TargetPlatform =~ /^mips-/;
771 # toss stack adjustment after DoSparks
772 $c =~ s/^(\tjbsr _DoSparks\n)\taddqw #8,sp/$1/g
773 if $TargetPlatform =~ /^m68k-/; # this looks old...
775 if ( $TargetPlatform =~ /^alpha-/ &&
776 ! $magic_rdata_seen &&
777 $c =~ /^\s*\.rdata\n\t\.quad 0\n\t\.align \d\n/ ) {
778 $c =~ s/^\s*\.rdata\n\t\.quad 0\n\t\.align (\d)\n/\.rdata\n\t\.align $1\n/;
779 $magic_rdata_seen = 1;
782 # pick some end-things and move them to the next chunk
784 # pin a funny end-thing on (for easier matching):
785 $c .= 'FUNNY#END#THING';
787 while ( $c =~ /${T_MOVE_DIRVS}FUNNY#END#THING/o ) {
791 # on x86 we try not to copy any directives into a literal
792 # chunk, rather we keep looking for the next real chunk. This
793 # is because we get things like
795 # .globl blah_closure
801 if ( $TargetPlatform =~ /^(i386|sparc)/ && $to_move =~ /${T_COPY_DIRVS}/ ) {
803 while ( $j < $numchks && $chk[$j] =~ /$T_CONST_LBL/) {
806 if ( $j < $numchks ) {
807 $chk[$j] = $to_move . $chk[$j];
811 elsif ( $i < ($numchks - 1)
812 && ( $to_move =~ /${T_COPY_DIRVS}/
813 || ($TargetPlatform =~ /^hppa/ && $to_move =~ /align/ && $chkcat[$i+1] eq 'literal') )) {
814 $chk[$i + 1] = $to_move . $chk[$i + 1];
815 # otherwise they're tossed
818 $c =~ s/${T_MOVE_DIRVS}FUNNY#END#THING/FUNNY#END#THING/o;
821 if ( $TargetPlatform =~ /^alpha-/ && $c =~ /^\t\.ent\s+(\S+)/ ) {
823 # toss all prologue stuff, except for loading gp, and the ..ng address
824 if (($p, $r) = split(/^\t\.prologue/, $c)) {
825 if (($keep, $junk) = split(/\.\.ng:/, $p)) {
826 $keep =~ s/^\t\.frame.*\n/\t.frame \$30,0,\$26,0\n/;
827 $keep =~ s/^\t\.(mask|fmask).*\n//g;
828 $c = $keep . "..ng:\n";
830 print STDERR "malformed code block ($ent)?\n"
833 $c .= "\t.prologue" . $r;
836 $c =~ s/FUNNY#END#THING//;
838 # print STDERR "\nCHK $i (AFTER) (",$chkcat[$i],"):\n", $c;
840 $chk[$i] = $c; # update w/ convenience copy
843 # open CHUNKS, ">/tmp/chunks2" or die "Cannot open /tmp/chunks2: $!\n";
844 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
847 if ( $TargetPlatform =~ /^alpha-/ ) {
848 # print out the header stuff first
849 $chk[0] =~ s/^(\t\.file.*)"(ghc\d+\.c)"/$1"$ifile_root.hc"/;
850 print OUTASM $chk[0];
852 } elsif ( $TargetPlatform =~ /^hppa/ ) {
853 print OUTASM $chk[0];
855 } elsif ( $TargetPlatform =~ /^mips-/ ) {
856 $chk[0] = "\t\.file\t1 \"$ifile_root.hc\"\n" . $chk[0];
858 # get rid of horrible "<dollar>Revision: .*$" strings
859 local(@lines0) = split(/\n/, $chk[0]);
861 while ( $z <= $#lines0 ) {
862 if ( $lines0[$z] =~ /^\t\.byte\t0x24,0x52,0x65,0x76,0x69,0x73,0x69,0x6f$/ ) {
865 while ( $z <= $#lines0 ) {
867 last if $lines0[$z] =~ /[,\t]0x0$/;
873 $chk[0] = join("\n", @lines0);
874 $chk[0] =~ s/\n\n+/\n/;
875 print OUTASM $chk[0];
878 # print out all the literal strings next
879 for ($i = 0; $i < $numchks; $i++) {
880 if ( $chkcat[$i] eq 'literal' ) {
881 print OUTASM $T_HDR_literal, $chk[$i];
882 print OUTASM "; end literal\n" if $TargetPlatform =~ /^hppa/; # for the splitter
884 $chkcat[$i] = 'DONE ALREADY';
888 # on the HPPA, print out all the bss next
889 if ( $TargetPlatform =~ /^hppa/ ) {
890 for ($i = 1; $i < $numchks; $i++) {
891 if ( $chkcat[$i] eq 'bss' ) {
892 print OUTASM "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$BSS\$\n\t.align 4\n";
893 print OUTASM $chk[$i];
895 $chkcat[$i] = 'DONE ALREADY';
900 for ($i = $FIRST_MANGLABLE; $i < $numchks; $i++) {
901 # print STDERR "$i: cat $chkcat[$i], symb $chksymb[$i]\n";
903 next if $chkcat[$i] eq 'DONE ALREADY';
905 if ( $chkcat[$i] eq 'misc' ) {
906 if ($chk[$i] ne '') {
907 print OUTASM $T_HDR_misc;
908 &print_doctored($chk[$i], 0);
911 } elsif ( $chkcat[$i] eq 'toss' ) {
912 print STDERR "*** NB: TOSSING code for $chksymb[$i] !!! ***\n";
914 } elsif ( $chkcat[$i] eq 'data' ) {
915 if ($chk[$i] ne '') {
916 print OUTASM $T_HDR_data;
917 print OUTASM $chk[$i];
920 } elsif ( $chkcat[$i] eq 'consist' ) {
921 if ( $chk[$i] =~ /$T_hsc_cc_PAT/o ) {
922 local($consist) = "$1.$2.$3";
924 $consist =~ s/\//./g;
926 $consist =~ s/[^A-Za-z0-9_.]/ZZ/g; # ToDo: properly?
928 # Using a cygnus-2.7-96q4 gcc build on hppas, the
929 # consistency chunk for ghc_cc_ID often (but not always!)
930 # gets lumped with a bunch of .IMPORT directives containing info on
931 # the code or data space nature of external symbols. We can't
932 # toss these, so once the consistency ID has been turned into
933 # a representable symbol, we substitute it for the symbol
934 # that the string was attached to in the first place (ghc_cc_ID.)
935 # (The original string is also substituted away.)
937 # This change may affect the code output on other platforms in
938 # adverse ways, hence we restrict this hack hppa targets only.
941 if ( $TargetPlatform =~ /^hppa/ ) {
942 $chk[$i] =~ s/^${T_US}ghc.*c_ID$TPOSTLBL/$consist/o;
943 $chk[$i] =~ s/\t$T_hsc_cc_PAT/$T_HDR_misc/o;
944 $consist = $chk[$i]; #clumsily
946 print OUTASM $T_HDR_consist, "${consist}${T_POST_LBL}\n";
948 } elsif ( $TargetPlatform !~ /^(mips)-/ ) { # we just don't try in those case (ToDo)
949 # on mips: consistency string is just a v
950 # horrible bunch of .bytes,
951 # which I am too lazy to sort out (WDP 95/05)
953 print STDERR "Couldn't grok consistency: ", $chk[$i];
956 } elsif ( $chkcat[$i] eq 'splitmarker' ) {
957 # we can just re-constitute this one...
958 # NB: we emit _three_ underscores no matter what,
959 # so ghc-split doesn't have to care.
960 print OUTASM "___stg_split_marker",$chksymb[$i],"${T_POST_LBL}\n";
962 } elsif ( $chkcat[$i] eq 'closure'
963 || $chkcat[$i] eq 'srt'
964 || $chkcat[$i] eq 'infotbl'
965 || $chkcat[$i] eq 'slow'
966 || $chkcat[$i] eq 'fast' ) { # do them in that order
967 $symb = $chksymb[$i];
970 if ( defined($closurechk{$symb}) ) {
971 print OUTASM $T_HDR_closure;
972 print OUTASM $chk[$closurechk{$symb}];
973 $chkcat[$closurechk{$symb}] = 'DONE ALREADY';
977 if ( defined($srtchk{$symb}) ) {
978 print OUTASM $T_HDR_srt;
979 print OUTASM $chk[$srtchk{$symb}];
980 $chkcat[$srtchk{$symb}] = 'DONE ALREADY';
984 if ( defined($infochk{$symb}) ) {
986 print OUTASM $T_HDR_info;
987 print OUTASM &rev_tbl($symb, $chk[$infochk{$symb}], 1);
989 # entry code will be put here!
991 $chkcat[$infochk{$symb}] = 'DONE ALREADY';
995 if ( defined($slowchk{$symb}) ) {
997 # teach it to drop through to the fast entry point:
998 $c = $chk[$slowchk{$symb}];
1000 if ( defined($fastchk{$symb}) ) {
1001 if ( $TargetPlatform =~ /^alpha-/ ) {
1002 $c =~ s/^\tjmp \$31,\(\$27\),0\n\t\.align 4\n\t\.end/\t.align 4\n\t.end/;
1003 } elsif ( $TargetPlatform =~ /^hppa/ ) {
1004 $c =~ s/^\s+ldil.*\n\s+ldo.*\n\s+bv.*\n(.*\n)?\s+\.EXIT/$1\t.EXIT/;
1005 } elsif ( $TargetPlatform =~ /^i386-/ ) {
1006 # Reg alloc depending, gcc generated code may jump to the fast entry point via
1007 # a number of registers.
1008 $c =~ s/^\tmovl\s+\$${T_US}${symb}_fast\d*,\s*\%edx\n\tjmp\s+\*\%edx\n//;
1009 $c =~ s/^\tmovl\s+\$${T_US}${symb}_fast\d*,\s*\%ecx\n\tjmp\s+\*\%ecx\n//;
1010 $c =~ s/^\tmovl\s+\$${T_US}${symb}_fast\d*,\s*\%eax\n\tjmp\s+\*\%eax\n//;
1011 # The next two only apply if we're not stealing %esi or %edi.
1012 $c =~ s/^\tmovl\s+\$${T_US}${symb}_fast\d*,\s*\%esi\n\tjmp\s+\*\%esi\n// if ($StolenX86Regs < 3);
1013 $c =~ s/^\tmovl\s+\$${T_US}${symb}_fast\d*,\s*\%edi\n\tjmp\s+\*\%edi\n// if ($StolenX86Regs < 4);
1014 } elsif ( $TargetPlatform =~ /^mips-/ ) {
1015 $c =~ s/^\tjmp \$31,\(\$27\),0\n\t\.align 4\n\t\.end/\t.align 4\n\t.end/;
1016 } elsif ( $TargetPlatform =~ /^m68k-/ ) {
1017 $c =~ s/^\tjmp ${T_US}${symb}_fast\d+.*\n\tnop\n//;
1018 $c =~ s/^\tjmp ${T_US}${symb}_fast\d+.*\n//;
1019 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ ) {
1020 $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//;
1021 # addis r9,r31,ha16(L_XXXX_fast3$non_lazy_ptr-L32$pb)
1022 # lwz r9,lo16(L_XXXX_fast3$non_lazy_ptr-L32$pb)(r9)
1025 } elsif ( $TargetPlatform =~ /^sparc-/ ) {
1026 $c =~ s/^\tcall\s+${T_US}${symb}_fast\d+,.*\n\t\s*nop\n//;
1027 $c =~ s/^\tcall\s+${T_US}${symb}_fast\d+,.*\n(\t\s*[a-z].*\n)/$1/;
1029 print STDERR "$Pgm: mystery slow-fast dropthrough: $TargetPlatform\n";
1033 if ( $TargetPlatform !~ /^(alpha-|hppa|mips-|powerpc-apple-)/) {
1034 # On alphas, hppa: no very good way to look for "dangling"
1035 # references to fast-entry point.
1036 # (questionable re hppa and mips...)
1037 print STDERR "still has jump to fast entry point:\n$c"
1038 if $c =~ /\b${T_US}${symb}_fast/;
1041 print OUTASM $T_HDR_entry;
1043 &print_doctored($c, 1); # NB: the 1!!!
1045 $chkcat[$slowchk{$symb}] = 'DONE ALREADY';
1049 if ( defined($fastchk{$symb}) ) {
1050 $c = $chk[$fastchk{$symb}];
1051 if ( ! defined($slowchk{$symb})
1052 # ToDo: the || clause can go once we're no longer
1053 # concerned about producing exactly the same output as before
1054 #OLD: || $TargetPlatform =~ /^(m68k|sparc|i386)-/
1056 print OUTASM $T_HDR_fast;
1059 &print_doctored($c, 0);
1060 $chkcat[$fastchk{$symb}] = 'DONE ALREADY';
1063 } elsif ( $chkcat[$i] eq 'vector'
1064 || $chkcat[$i] eq 'direct' ) { # do them in that order
1065 $symb = $chksymb[$i];
1068 if ( defined($vectorchk{$symb}) ) {
1069 print OUTASM $T_HDR_vector;
1071 print OUTASM &rev_tbl($symb, $chk[$vectorchk{$symb}], 0);
1072 # DO NOT DELETE THE NEXT LINE. It fixes a rather subtle GC bug
1073 # which showed up as a segfault reported by Ryszard Kubiak.
1074 # Problem is with vector tables. They wind up as follows:
1076 # .word some-other-word
1078 # Problem is that we want the label fooble_vtbl to be considered
1079 # in the same section as the vtbl itself, but the label actually
1080 # lives at the next word along. If a data segment should happen
1081 # to immediately follow the vtbl, as it can in GHCi, the label will
1082 # be malclassified as in the data rather than text segment (during
1083 # GC), and so we will regard references to it as static closure
1084 # pointers rather than as code pointers, which is an error which
1085 # usually crashes the garbage collectors.
1086 # To fix this, we place a dummy word after the label, so as to
1087 # ensure that the label is in the same segment as the vtbl proper.
1088 # The native code generator has an analogous fix; see
1089 # ghc/compiler/nativeGen/AbsCStixGen.lhs line 107.
1090 print OUTASM "${T_create_word} 0\n";
1092 # direct return code will be put here!
1093 $chkcat[$vectorchk{$symb}] = 'DONE ALREADY';
1095 } elsif ( $TargetPlatform =~ /^alpha-/ ) {
1096 # Alphas: the commented nop is for the splitter, to ensure
1097 # that no module ends with a label as the very last
1098 # thing. (The linker will adjust the label to point
1099 # to the first code word of the next module linked in,
1100 # even if alignment constraints cause the label to move!)
1102 print OUTASM "\t# nop\n";
1105 } elsif ( $chkcat[$i] eq 'toc' ) {
1106 # silly optimisation to print tocs, since they come in groups...
1107 print OUTASM $T_HDR_toc;
1109 while ($chkcat[$j] eq 'toc')
1110 { if ( $chk[$j] !~ /\.tc UpdatePAP\[TC\]/ # not needed: always turned into a jump.
1113 print OUTASM $chk[$j];
1115 $chkcat[$j] = 'DONE ALREADY';
1120 &tidy_up_and_die(1,"$Pgm: unknown chkcat (ghc-asm: $TargetPlatform)\n$chkcat[$i]\n$chk[$i]\n");
1124 print OUTASM $EXTERN_DECLS if $TargetPlatform =~ /^mips-/;
1127 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1128 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1133 sub mash_hppa_prologue { # OK, epilogue, too
1136 # toss all prologue stuff
1137 s/^\s+\.ENTRY[^\0]*--- BEGIN ---/\t.ENTRY/;
1139 # Lie about our .CALLINFO
1140 s/^\s+\.CALLINFO.*$/\t.CALLINFO NO_CALLS,NO_UNWIND/;
1147 # toss all epilogue stuff
1148 s/^\s+--- END ---[^\0]*\.EXIT/\t.EXIT/;
1150 # Sorry; we moved the _info stuff to the code segment.
1151 s/_info,DATA/_info,CODE/g;
1158 sub print_doctored {
1159 local($_, $need_fallthru_patch) = @_;
1161 if ( $TargetPlatform !~ /^i386-/
1162 || ! /^\t[a-z]/ # no instructions in here, apparently
1163 || /^${T_US}__stginit_[A-Za-z0-9_]+${T_POST_LBL}/) {
1167 # OK, must do some x86 **HACKING**
1169 local($entry_patch) = '';
1170 local($exit_patch) = '';
1172 # gotta watch out for weird instructions that
1173 # invisibly smash various regs:
1174 # rep* %ecx used for counting
1175 # scas* %edi used for destination index
1176 # cmps* %e[sd]i used for indices
1177 # loop* %ecx used for counting
1182 # * use of STG reg [ nn(%ebx) ] where no machine reg avail
1184 # * GCC used an "STG reg" for its own purposes
1186 # * some secret uses of machine reg, requiring STG reg
1187 # to be saved/restored
1189 # The most dangerous "GCC uses" of an "STG reg" are when
1190 # the reg holds the target of a jmp -- it's tricky to
1191 # insert the patch-up code before we get to the target!
1192 # So here we change the jmps:
1194 # --------------------------------------------------------
1195 # it can happen that we have jumps of the form...
1196 # jmp *<something involving %esp>
1198 # jmp <something involving another naughty register...>
1200 # a reasonably-common case is:
1202 # movl $_blah,<bad-reg>
1206 s/^\tmovl\s+\$${T_US}(.*),(\%e[abcd]x)\n\tjmp\s+\*\2/\tjmp $T_US$1/g;
1208 if ($StolenX86Regs <= 2 ) { # YURGH! spurious uses of esi?
1209 s/^\tmovl\s+(.*),\s*\%esi\n\tjmp\s+\*%esi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1210 s/^\tjmp\s+\*(.*\(.*\%esi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1211 s/^\tjmp\s+\*\%esi\n/\tmovl \%esi,\%eax\n\tjmp \*\%eax\n/g;
1212 die "$Pgm: (mangler) still have jump involving \%esi!\n$_"
1213 if /(jmp|call)\s+.*\%esi/;
1215 if ($StolenX86Regs <= 3 ) { # spurious uses of edi?
1216 s/^\tmovl\s+(.*),\s*\%edi\n\tjmp\s+\*%edi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1217 s/^\tjmp\s+\*(.*\(.*\%edi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1218 s/^\tjmp\s+\*\%edi\n/\tmovl \%edi,\%eax\n\tjmp \*\%eax\n/g;
1219 die "$Pgm: (mangler) still have jump involving \%edi!\n$_"
1220 if /(jmp|call)\s+.*\%edi/;
1223 # OK, now we can decide what our patch-up code is going to
1226 # Offsets into register table - you'd better update these magic
1227 # numbers should you change its contents!
1228 # local($OFFSET_R1)=0; No offset for R1 in new RTS.
1229 local($OFFSET_Hp)=92;
1231 # Note funky ".=" stuff; we're *adding* to these _patch guys
1232 if ( $StolenX86Regs <= 2
1233 && ( /[^0-9]\(\%ebx\)/ || /\%esi/ || /^\tcmps/ ) ) { # R1 (esi)
1234 $entry_patch .= "\tmovl \%esi,(\%ebx)\n";
1235 $exit_patch .= "\tmovl (\%ebx),\%esi\n";
1237 # nothing for call_{entry,exit} because %esi is callee-save
1239 if ( $StolenX86Regs <= 3
1240 && ( /${OFFSET_Hp}\(\%ebx\)/ || /\%edi/ || /^\t(scas|cmps)/ ) ) { # Hp (edi)
1241 $entry_patch .= "\tmovl \%edi,${OFFSET_Hp}(\%ebx)\n";
1242 $exit_patch .= "\tmovl ${OFFSET_Hp}(\%ebx),\%edi\n";
1244 # nothing for call_{entry,exit} because %edi is callee-save
1247 # --------------------------------------------------------
1248 # next, here we go with non-%esp patching!
1250 s/^(\t[a-z])/$entry_patch$1/; # before first instruction
1252 # Before calling GC we must set up the exit condition before the call
1253 # and entry condition when we come back
1255 # fix _all_ non-local jumps:
1257 s/^\tjmp\s+\*${T_X86_PRE_LLBL_PAT}/\tJMP___SL/go;
1258 s/^\tjmp\s+${T_X86_PRE_LLBL_PAT}/\tJMP___L/go;
1260 s/^(\tjmp\s+.*\n)/$exit_patch$1/g; # here's the fix...
1262 s/^\tJMP___SL/\tjmp \*${T_X86_PRE_LLBL}/go;
1263 s/^\tJMP___L/\tjmp ${T_X86_PRE_LLBL}/go;
1265 if ($StolenX86Regs == 2 ) {
1266 die "ARGH! Jump uses \%esi or \%edi with -monly-2-regs:\n$_"
1267 if /^\t(jmp|call)\s+.*\%e(si|di)/;
1268 } elsif ($StolenX86Regs == 3 ) {
1269 die "ARGH! Jump uses \%edi with -monly-3-regs:\n$_"
1270 if /^\t(jmp|call)\s+.*\%edi/;
1273 # --------------------------------------------------------
1274 # that's it -- print it
1276 #die "Funny jumps?\n$_" if /${T_X86_BADJMP}/o; # paranoia
1280 if ( $need_fallthru_patch ) { # exit patch for end of slow entry code
1281 print OUTASM $exit_patch;
1282 # ToDo: make it not print if there is a "jmp" at the end
1288 sub init_FUNNY_THINGS {
1289 %KNOWN_FUNNY_THING = (
1291 # "${T_US}stg_.*{T_POST_LBL}", 1,
1296 The following table reversal is used for both info tables and return
1297 vectors. In both cases, we remove the first entry from the table,
1298 reverse the table, put the label at the end, and paste some code
1299 (that which is normally referred to by the first entry in the table)
1300 right after the table itself. (The code pasting is done elsewhere.)
1304 local($symb, $tbl, $discard1) = @_;
1306 local($before) = '';
1308 local(@imports) = (); # hppa only
1311 local(@lines) = split(/\n/, $tbl);
1314 # Deal with the header...
1315 for ($i = 0; $i <= $#lines && $lines[$i] !~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1316 $label .= $lines[$i] . "\n",
1317 next if $lines[$i] =~ /^[A-Za-z0-9_]+_info${T_POST_LBL}$/o
1318 || $lines[$i] =~ /${T_DOT_GLOBAL}/o
1319 || $lines[$i] =~ /^${T_US}\S+_vtbl${T_POST_LBL}$/o;
1321 $before .= $lines[$i] . "\n"; # otherwise...
1324 # Grab the table data...
1325 if ( $TargetPlatform !~ /^hppa/ ) {
1326 for ( ; $i <= $#lines && $lines[$i] =~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1327 push(@words, $lines[$i]);
1329 } else { # hppa weirdness
1330 for ( ; $i <= $#lines && $lines[$i] =~ /^\s+(${T_DOT_WORD}|\.IMPORT)/; $i++) {
1331 if ($lines[$i] =~ /^\s+\.IMPORT/) {
1332 push(@imports, $lines[$i]);
1334 # We don't use HP's ``function pointers''
1335 # We just use labels in code space, like normal people
1336 $lines[$i] =~ s/P%//;
1337 push(@words, $lines[$i]);
1342 # now throw away the first word (SRT) iff it is empty.
1343 # The .zero business is for Linux/ELF.
1344 # The .skip business is for Sparc/Solaris/ELF.
1345 # The .blockz business is for HPPA.
1346 if ($discard1 && $words[0] =~ /^\t?(${T_DOT_WORD}\s+0|\.zero\s+4|\.skip\s+4|\.blockz\s+4)/) {
1350 for (; $i <= $#lines; $i++) {
1351 $after .= $lines[$i] . "\n";
1354 # Alphas: If we have anonymous text (not part of a procedure), the
1355 # linker may complain about missing exception information. Bleh.
1356 # To suppress this, we place a .ent/.end pair around the code.
1357 # At the same time, we have to be careful and not enclose any leading
1358 # .file/.loc directives.
1359 if ( $TargetPlatform =~ /^alpha-/ && $label =~ /^([A-Za-z0-9_]+):$/) {
1360 local ($ident) = $1;
1361 $before =~ s/^((\s*\.(file|loc)\s+[^\n]*\n)*)/$1\t.ent $ident\n/;
1362 $after .= "\t.end $ident\n";
1365 # Alphas: The heroic Simon Marlow found a bug in the Digital UNIX
1366 # assembler (!) wherein .quad constants inside .text sections are
1367 # first narrowed to 32 bits then sign-extended back to 64 bits.
1368 # This obviously screws up our 64-bit bitmaps, so we work around
1369 # the bug by replacing .quad with .align 3 + .long + .long [ccshan]
1370 if ( $TargetPlatform =~ /^alpha-/ ) {
1372 if (/^\s*\.quad\s+([-+0-9].*\S)\s*$/ && length $1 >= 10) {
1373 local ($number) = $1;
1374 if ($number =~ /^([-+])?(0x?)?([0-9]+)$/) {
1375 local ($sign, $base, $digits) = ($1, $2, $3);
1376 $base = (10, 8, 16)[length $base];
1377 local ($hi, $lo) = (0, 0);
1378 foreach $i (split(//, $digits)) {
1379 $j = $lo * $base + $i;
1380 $lo = $j % 4294967296;
1381 $hi = $hi * $base + ($j - $lo) / 4294967296;
1383 ($hi, $lo) = (4294967295 - $hi, 4294967296 - $lo)
1385 $_ = "\t.align 3\n\t.long $lo\n\t.long $hi\n";
1386 # printf STDERR "TURNING %s into 0x %08x %08x\n", $number, $hi, $lo;
1388 print STDERR "Cannot handle \".quad $number\" in info table\n";
1396 . (($TargetPlatform !~ /^hppa/) ? '' : join("\n", @imports) . "\n")
1397 . join("\n", @words) . "\n"
1400 # print STDERR "before=$before\n";
1401 # print STDERR "label=$label\n";
1402 # print STDERR "words=",(reverse @words),"\n";
1403 # print STDERR "after=$after\n";
1409 The HP is a major nuisance. The threaded code mangler moved info
1410 tables from data space to code space, but unthreaded code in the RTS
1411 still has references to info tables in data space. Since the HP
1412 linker is very precise about where symbols live, we need to patch the
1413 references in the unthreaded RTS as well.
1416 sub mini_mangle_asm_hppa {
1417 local($in_asmf, $out_asmf) = @_;
1419 open(INASM, "< $in_asmf")
1420 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
1421 open(OUTASM,"> $out_asmf")
1422 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
1425 s/_info,DATA/_info,CODE/; # Move _info references to code space
1431 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1432 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1438 sub tidy_up_and_die {
1439 local($return_val, $msg) = @_;
1441 exit (($return_val == 0) ? 0 : 1);