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*(\$.*\.\.ng:|\.align\s+\d+|\.(globl|ent)\s+\S+|\#.*|\.(file|loc)\s+\S+\s+\S+|\.text|\.r?data)\n)';
100 $T_COPY_DIRVS = '^\s*(\$.*\.\.ng:|\#|\.(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_vector = "\.text\n\t\.align 3\n";
114 $T_HDR_direct = "\.text\n\t\.align 3\n";
115 $T_create_word = "\t.quad";
117 #--------------------------------------------------------#
118 } elsif ( $TargetPlatform =~ /^hppa/ ) {
120 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
121 $T_US = ''; # _ if symbols have an underscore on the front
122 $T_PRE_APP = 'DONT THINK THIS APPLIES'; # regexp that says what comes before APP/NO_APP
123 $T_CONST_LBL = '^L\$C(\d+)$'; # regexp for what such a lbl looks like
126 $T_MOVE_DIRVS = '^((\s+\.(IMPORT|EXPORT|PARAM).*|\s+\.align\s+\d+|\s+\.(SPACE|SUBSPA)\s+\S+|\s*)\n)';
127 $T_COPY_DIRVS = '^\s+\.(IMPORT|EXPORT)';
129 $T_hsc_cc_PAT = '\.STRING.*\)(hsc|cc) (.*)\\\\x09(.*)\\\\x00"';
130 $T_DOT_WORD = '\.(blockz|word|half|byte)';
131 $T_DOT_GLOBAL = '^\s+\.EXPORT';
132 $T_HDR_literal = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$LIT\$\n";
133 $T_HDR_misc = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
134 $T_HDR_data = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
135 $T_HDR_consist = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$LIT\$\n";
136 $T_HDR_closure = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
137 $T_HDR_srt = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
138 $T_HDR_info = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
139 $T_HDR_entry = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
140 $T_HDR_vector = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
141 $T_HDR_direct = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
142 $T_create_word = "\t.word";
144 #--------------------------------------------------------#
145 } elsif ( $TargetPlatform =~ /^i386-.*-(linuxaout|freebsd2|openbsd|nextstep3|cygwin32|mingw32)$/ ) {
146 # NeXT added but not tested. CaS
148 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
149 $T_US = '_'; # _ if symbols have an underscore on the front
150 $T_PRE_APP = '^#'; # regexp that says what comes before APP/NO_APP
151 $T_CONST_LBL = '^LC(\d+):$';
153 $T_X86_PRE_LLBL_PAT = 'L';
154 $T_X86_PRE_LLBL = 'L';
155 $T_X86_BADJMP = '^\tjmp [^L\*]';
157 $T_MOVE_DIRVS = '^(\s*(\.(p2)?align\s+\d+(,0x90)?|\.globl\s+\S+|\.text|\.data|\.stab[^n].*|\.type\s+.*|\.size\s+.*)\n)';
158 $T_COPY_DIRVS = '\.(globl|stab)';
159 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
160 $T_DOT_WORD = '\.(long|word|value|byte|space)';
161 $T_DOT_GLOBAL = '\.globl';
162 $T_HDR_literal = "\.text\n\t\.align 2\n";
163 $T_HDR_misc = "\.text\n\t\.align 2,0x90\n";
164 $T_HDR_data = "\.data\n\t\.align 2\n";
165 $T_HDR_consist = "\.text\n";
166 $T_HDR_closure = "\.data\n\t\.align 2\n";
167 $T_HDR_srt = "\.text\n\t\.align 2\n";
168 $T_HDR_info = "\.text\n\t\.align 2\n"; # NB: requires padding
169 $T_HDR_entry = "\.text\n"; # no .align so we're right next to _info (arguably wrong...?)
170 $T_HDR_vector = "\.text\n\t\.align 2\n"; # NB: requires padding
171 $T_HDR_direct = "\.text\n\t\.align 2,0x90\n";
172 $T_create_word = "\t.word";
174 #--------------------------------------------------------#
175 } elsif ( $TargetPlatform =~ /^i386-.*-(solaris2|linux|freebsd|netbsd)$/ ) {
177 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
178 $T_US = ''; # _ if symbols have an underscore on the front
179 $T_PRE_APP = # regexp that says what comes before APP/NO_APP
180 ($TargetPlatform =~ /-(linux|freebsd|netbsd)$/) ? '#' : '/' ;
181 $T_CONST_LBL = '^\.LC(\d+):$'; # regexp for what such a lbl looks like
183 $T_X86_PRE_LLBL_PAT = '\.L';
184 $T_X86_PRE_LLBL = '.L';
185 $T_X86_BADJMP = '^\tjmp\s+[^\.\*]';
187 $T_MOVE_DIRVS = '^(\s*(\.(p2)?align\s+\d+(,\s*0x90)?|\.globl\s+\S+|\.text|\.data|\.section\s+.*|\.type\s+.*|\.size\s+\S+\s*,\s*\d+|\.ident.*|\.local.*)\n)';
188 $T_COPY_DIRVS = '^\s*\.(globl|type|size|local)';
190 if ( $TargetPlatform =~ /freebsd|netbsd/ ) {
191 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
193 $T_hsc_cc_PAT = '\.string.*\)(hsc|cc) (.*)\\\\t(.*)"';
196 $T_DOT_WORD = '\.(long|value|word|byte|zero)';
197 $T_DOT_GLOBAL = '\.globl';
198 $T_HDR_literal = "\.section\t\.rodata\n"; # or just use .text??? (WDP 95/11)
199 $T_HDR_misc = "\.text\n\t\.align 4\n";
200 $T_HDR_data = "\.data\n\t\.align 4\n"; # ToDo: change align??
201 $T_HDR_consist = "\.text\n";
202 $T_HDR_closure = "\.data\n\t\.align 4\n"; # ToDo: change align?
203 $T_HDR_srt = "\.text\n\t\.align 4\n"; # ToDo: change align?
204 $T_HDR_info = "\.text\n\t\.align 4\n"; # NB: requires padding
205 $T_HDR_entry = "\.text\n"; # no .align so we're right next to _info (arguably wrong...?)
206 $T_HDR_vector = "\.text\n\t\.align 4\n"; # NB: requires padding
207 $T_HDR_direct = "\.text\n\t\.align 4\n";
208 $T_create_word = "\t.word";
210 #--------------------------------------------------------#
211 } elsif ( $TargetPlatform =~ /^ia64-.*-linux$/ ) {
213 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
214 $T_US = ''; # _ if symbols have an underscore on the front
216 $T_CONST_LBL = '^\.LC(\d+):$'; # regexp for what such a lbl looks like
219 $T_MOVE_DIRVS = '^(\s*\.(global|proc|pred\.safe_across_calls|text|data|section|subsection|align|size|type|ident)\s+.*\n)';
220 $T_COPY_DIRVS = '\.(global|proc)';
222 $T_hsc_cc_PAT = '\.string.*\)(hsc|cc) (.*)\\\\t(.*)"';
223 $T_DOT_WORD = '\.(long|value|byte|zero)';
224 $T_DOT_GLOBAL = '\.global';
225 $T_HDR_literal = "\.section\t\.rodata\n";
226 $T_HDR_misc = "\.text\n\t\.align 8\n";
227 $T_HDR_data = "\.data\n\t\.align 8\n";
228 $T_HDR_consist = "\.text\n";
229 $T_HDR_closure = "\.data\n\t\.align 8\n";
230 $T_HDR_srt = "\.text\n\t\.align 8\n";
231 $T_HDR_info = "\.text\n\t\.align 8\n";
232 $T_HDR_entry = "\.text\n\t\.align 16\n";
233 $T_HDR_vector = "\.text\n\t\.align 8\n";
234 $T_HDR_direct = "\.text\n\t\.align 8\n";
235 $T_create_word = "\t.word";
237 #--------------------------------------------------------#
238 } elsif ( $TargetPlatform =~ /^m68k-.*-sunos4/ ) {
240 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
241 $T_US = '_'; # _ if symbols have an underscore on the front
242 $T_PRE_APP = '^# MAY NOT APPLY'; # regexp that says what comes before APP/NO_APP
243 $T_CONST_LBL = '^LC(\d+):$';
246 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.proc\s+\d+|\.const|\.cstring|\.globl\s+\S+|\.text|\.data|\.even|\.stab[^n].*)\n)';
247 $T_COPY_DIRVS = '\.(globl|proc|stab)';
248 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
250 $T_DOT_WORD = '\.long';
251 $T_DOT_GLOBAL = '\.globl';
252 $T_HDR_literal = "\.text\n\t\.even\n";
253 $T_HDR_misc = "\.text\n\t\.even\n";
254 $T_HDR_data = "\.data\n\t\.even\n";
255 $T_HDR_consist = "\.text\n";
256 $T_HDR_closure = "\.data\n\t\.even\n";
257 $T_HDR_srt = "\.text\n\t\.even\n";
258 $T_HDR_info = "\.text\n\t\.even\n";
259 $T_HDR_entry = "\.text\n\t\.even\n";
260 $T_HDR_vector = "\.text\n\t\.even\n";
261 $T_HDR_direct = "\.text\n\t\.even\n";
262 $T_create_word = "\t.long";
264 #--------------------------------------------------------#
265 } elsif ( $TargetPlatform =~ /^mips-.*/ ) {
267 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
268 $T_US = ''; # _ if symbols have an underscore on the front
269 $T_PRE_APP = '^\s*#'; # regexp that says what comes before APP/NO_APP
270 $T_CONST_LBL = '^\$LC(\d+):$'; # regexp for what such a lbl looks like
273 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.(globl|ent)\s+\S+|\.text|\.r?data)\n)';
274 $T_COPY_DIRVS = '\.(globl|ent)';
276 $T_hsc_cc_PAT = 'I WAS TOO LAZY TO DO THIS BIT (WDP 95/05)';
277 $T_DOT_WORD = '\.word';
278 $T_DOT_GLOBAL = '^\t\.globl';
279 $T_HDR_literal = "\t\.rdata\n\t\.align 2\n";
280 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
281 $T_HDR_data = "\t\.data\n\t\.align 2\n";
282 $T_HDR_consist = 'TOO LAZY TO DO THIS TOO';
283 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
284 $T_HDR_srt = "\t\.text\n\t\.align 2\n";
285 $T_HDR_info = "\t\.text\n\t\.align 2\n";
286 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
287 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
288 $T_HDR_direct = "\t\.text\n\t\.align 2\n";
289 $T_create_word = "\t.word";
291 #--------------------------------------------------------#
292 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ ) {
293 # Apple PowerPC Darwin/MacOS X.
294 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
295 $T_US = '_'; # _ if symbols have an underscore on the front
296 $T_PRE_APP = 'WHAT IS THIS'; # regexp that says what comes before APP/NO_APP
297 $T_CONST_LBL = '^\LC\d+:'; # regexp for what such a lbl looks like
300 $T_MOVE_DIRVS = '^(\s*(\.align \d+|\.text|\.data|\.const_data|\.cstring|\.non_lazy_symbol_pointer|\.const|\.static_const|\.literal4|\.literal8|\.static_data|\.globl \S+|\.section .*)\n)';
301 $T_COPY_DIRVS = '\.(globl)';
303 $T_hsc_cc_PAT = '\.byte.*\)(hsc|cc) (.*)"\n\t\.byte \d+\n\t\.byte "(.*)"\n\t\.byte \d+';
304 $T_DOT_WORD = '\.(long|short|byte|fill|space)';
305 $T_DOT_GLOBAL = '\.globl';
306 $T_HDR_toc = "\.toc\n";
307 $T_HDR_literal = "\t\.const_data\n\t\.align 2\n";
308 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
309 $T_HDR_data = "\t\.data\n\t\.align 2\n";
310 $T_HDR_consist = "\t\.text\n\t\.align 2\n";
311 $T_HDR_closure = "\t\.const_data\n\t\.align 2\n";
312 $T_HDR_srt = "\t\.text\n\t\.align 2\n";
313 $T_HDR_info = "\t\.text\n\t\.align 2\n";
314 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
315 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
316 $T_HDR_direct = "\t\.text\n\t\.align 2\n";
317 $T_create_word = "\t.long";
319 #--------------------------------------------------------#
320 } elsif ( $TargetPlatform =~ /^sparc-.*-solaris2/ ) {
322 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
323 $T_US = ''; # _ if symbols have an underscore on the front
324 $T_PRE_APP = 'DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
325 $T_CONST_LBL = '^\.LLC(\d+):$'; # regexp for what such a lbl looks like
328 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.stab.*|\.section.*|\s+\.type.*|\s+\.size.*)\n)';
329 $T_COPY_DIRVS = '\.(global|proc|stab)';
331 $T_hsc_cc_PAT = '\.asciz.*\)(hsc|cc) (.*)\\\\t(.*)"';
332 $T_DOT_WORD = '\.(long|word|byte|half|skip|uahalf|uaword)';
333 $T_DOT_GLOBAL = '^\t\.global';
334 $T_HDR_literal = "\.text\n\t\.align 8\n";
335 $T_HDR_misc = "\.text\n\t\.align 4\n";
336 $T_HDR_data = "\.data\n\t\.align 8\n";
337 $T_HDR_consist = "\.text\n";
338 $T_HDR_closure = "\.data\n\t\.align 4\n";
339 $T_HDR_srt = "\.data\n\t\.align 4\n";
340 $T_HDR_info = "\.text\n\t\.align 4\n";
341 $T_HDR_entry = "\.text\n\t\.align 4\n";
342 $T_HDR_vector = "\.text\n\t\.align 4\n";
343 $T_HDR_direct = "\.text\n\t\.align 4\n";
344 $T_create_word = "\t.word";
346 #--------------------------------------------------------#
347 } elsif ( $TargetPlatform =~ /^sparc-.*-sunos4/ ) {
349 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
350 $T_US = '_'; # _ if symbols have an underscore on the front
351 $T_PRE_APP = '^# DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
352 $T_CONST_LBL = '^LC(\d+):$';
355 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.stab.*)\n)';
356 $T_COPY_DIRVS = '\.(global|proc|stab)';
357 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
359 $T_DOT_WORD = '\.word';
360 $T_DOT_GLOBAL = '^\t\.global';
361 $T_HDR_literal = "\.text\n\t\.align 8\n";
362 $T_HDR_misc = "\.text\n\t\.align 4\n";
363 $T_HDR_data = "\.data\n\t\.align 8\n";
364 $T_HDR_consist = "\.text\n";
365 $T_HDR_closure = "\.data\n\t\.align 4\n";
366 $T_HDR_srt = "\.data\n\t\.align 4\n";
367 $T_HDR_info = "\.text\n\t\.align 4\n";
368 $T_HDR_entry = "\.text\n\t\.align 4\n";
369 $T_HDR_vector = "\.text\n\t\.align 4\n";
370 $T_HDR_direct = "\.text\n\t\.align 4\n";
371 $T_create_word = "\t.word";
373 #--------------------------------------------------------#
375 print STDERR "$Pgm: don't know how to mangle assembly language for: $TargetPlatform\n";
380 print STDERR "T_STABBY: $T_STABBY\n";
381 print STDERR "T_US: $T_US\n";
382 print STDERR "T_PRE_APP: $T_PRE_APP\n";
383 print STDERR "T_CONST_LBL: $T_CONST_LBL\n";
384 print STDERR "T_POST_LBL: $T_POST_LBL\n";
385 if ( $TargetPlatform =~ /^i386-/ ) {
386 print STDERR "T_X86_PRE_LLBL_PAT: $T_X86_PRE_LLBL_PAT\n";
387 print STDERR "T_X86_PRE_LLBL: $T_X86_PRE_LLBL\n";
388 print STDERR "T_X86_BADJMP: $T_X86_BADJMP\n";
390 print STDERR "T_MOVE_DIRVS: $T_MOVE_DIRVS\n";
391 print STDERR "T_COPY_DIRVS: $T_COPY_DIRVS\n";
392 print STDERR "T_hsc_cc_PAT: $T_hsc_cc_PAT\n";
393 print STDERR "T_DOT_WORD: $T_DOT_WORD\n";
394 print STDERR "T_HDR_literal: $T_HDR_literal\n";
395 print STDERR "T_HDR_misc: $T_HDR_misc\n";
396 print STDERR "T_HDR_data: $T_HDR_data\n";
397 print STDERR "T_HDR_consist: $T_HDR_consist\n";
398 print STDERR "T_HDR_closure: $T_HDR_closure\n";
399 print STDERR "T_HDR_info: $T_HDR_info\n";
400 print STDERR "T_HDR_entry: $T_HDR_entry\n";
401 print STDERR "T_HDR_vector: $T_HDR_vector\n";
402 print STDERR "T_HDR_direct: $T_HDR_direct\n";
408 %************************************************************************
410 \subsection{Mangle away}
412 %************************************************************************
416 local($in_asmf, $out_asmf) = @_;
418 # multi-line regexp matching:
423 &init_TARGET_STUFF();
424 &init_FUNNY_THINGS();
426 open(INASM, "< $in_asmf")
427 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
428 open(OUTASM,"> $out_asmf")
429 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
431 # read whole file, divide into "chunks":
432 # record some info about what we've found...
434 @chk = (); # contents of the chunk
435 $numchks = 0; # number of them
436 @chkcat = (); # what category of thing in each chunk
437 @chksymb = (); # what symbol(base) is defined in this chunk
438 %entrychk = (); # ditto, its entry code
439 %closurechk = (); # ditto, the (static) closure
440 %srtchk = (); # ditto, its SRT (for top-level things)
441 %infochk = (); # given a symbol base, say what chunk its info tbl is in
442 %vectorchk = (); # ditto, return vector table
443 $EXTERN_DECLS = ''; # .globl <foo> .text (MIPS only)
445 $i = 0; $chkcat[0] = 'misc'; $chk[0] = '';
448 tr/\r//d if $TargetPlatform =~ /-mingw32$/; # In case Perl doesn't convert line endings
449 next if $T_STABBY && /^\.stab.*${T_US}__stg_split_marker/o;
450 next if $T_STABBY && /^\.stab.*ghc.*c_ID/;
451 next if /^\t\.def.*endef$/;
452 next if /${T_PRE_APP}(NO_)?APP/o;
453 next if /^;/ && $TargetPlatform =~ /^hppa/;
455 next if /(^$|^\t\.file\t|^ # )/ && $TargetPlatform =~ /^(mips|ia64)-/;
457 if ( $TargetPlatform =~ /^mips-/
458 && /^\t\.(globl\S+\.text|comm\t)/ ) {
459 $EXTERN_DECLS .= $_ unless /(__DISCARD__|\b(PK_|ASSIGN_)(FLT|DBL)\b)/;
460 # Treat .comm variables as data. These show up in two (known) places:
462 # - the module_registered variable used in the __stginit fragment.
463 # even though these are declared static and initialised, gcc 3.3
464 # likes to make them .comm, presumably to save space in the
467 # - global variables used to pass arguments from C to STG in
468 # a foreign export. (is this still true? --SDM)
470 } elsif ( /^\t\.comm.*$/ ) {
472 $chkcat[$i] = 'data';
475 } elsif ( /^\s+/ ) { # most common case first -- a simple line!
476 # duplicated from the bottom
480 } elsif ( /\.\.ng:$/ && $TargetPlatform =~ /^alpha-/ ) {
481 # Alphas: Local labels not to be confused with new chunks
484 # NB: all the rest start with a non-space
486 } elsif ( $TargetPlatform =~ /^mips-/
487 && /^\d+:/ ) { # a funny-looking very-local label
490 } elsif ( /$T_CONST_LBL/o ) {
492 $chkcat[$i] = 'literal';
495 } elsif ( /^${T_US}__stg_split_marker(\d*)${T_POST_LBL}$/o ) {
497 $chkcat[$i] = 'splitmarker';
500 } elsif ( /^${T_US}([A-Za-z0-9_]+)_info${T_POST_LBL}$/o ) {
503 $chkcat[$i] = 'infotbl';
504 $chksymb[$i] = $symb;
506 die "Info table already? $symb; $i\n" if defined($infochk{$symb});
508 $infochk{$symb} = $i;
510 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(entry|ret)${T_POST_LBL}$/o ) {
512 $chkcat[$i] = 'entry';
517 } elsif ( /^${T_US}([A-Za-z0-9_]+)_closure${T_POST_LBL}$/o ) {
519 $chkcat[$i] = 'closure';
522 $closurechk{$1} = $i;
524 } elsif ( /^${T_US}([A-Za-z0-9_]+)_srt${T_POST_LBL}$/o ) {
531 } elsif ( /^${T_US}([A-Za-z0-9_]+)_ct${T_POST_LBL}$/o ) {
533 $chkcat[$i] = 'data';
536 } elsif ( /^(${T_US}__gnu_compiled_c|gcc2_compiled\.)${T_POST_LBL}/o ) {
539 } elsif ( /^${T_US}[A-Za-z0-9_]+\.\d+${T_POST_LBL}$/o
540 || /^${T_US}.*_CAT${T_POST_LBL}$/o # PROF: _entryname_CAT
541 || /^${T_US}.*_done${T_POST_LBL}$/o # PROF: _module_done
542 || /^${T_US}_module_registered${T_POST_LBL}$/o # PROF: _module_registered
545 $chkcat[$i] = 'data';
548 } elsif ( /^([A-Za-z0-9_]+)\s+\.comm/ && $TargetPlatform =~ /^hppa/ ) {
553 } elsif ( /^${T_US}([A-Za-z0-9_]+)_cc(s)?${T_POST_LBL}$/o ) {
554 # all CC_ symbols go in the data section...
556 $chkcat[$i] = 'data';
559 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(alt|dflt)${T_POST_LBL}$/o ) {
561 $chkcat[$i] = 'misc';
563 } elsif ( /^${T_US}([A-Za-z0-9_]+)_vtbl${T_POST_LBL}$/o ) {
565 $chkcat[$i] = 'vector';
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 && ( $TargetPlatform !~ /^hppa/ # need to avoid local labels in this case
585 || ! /^L\$\d+$/ ) ) {
589 print STDERR "Warning: retaining unknown function \`$thing' in output from C compiler\n"
590 unless # $KNOWN_FUNNY_THING{$thing}
591 /^${T_US}stg_.*${T_POST_LBL}$/o # RTS internals
592 || /^${T_US}__stg_.*${T_POST_LBL}$/o # more RTS internals
593 || /^${T_US}__fexp_.*${T_POST_LBL}$/o # foreign export
594 || /^${T_US}.*_slow${T_POST_LBL}$/o # slow entry
595 || /^${T_US}__stginit.*${T_POST_LBL}$/o # __stginit<module>
596 || /^${T_US}.*_btm${T_POST_LBL}$/o # large bitmaps
597 || /^${T_US}.*_srtd${T_POST_LBL}$/o # large bitmaps
598 || /^${T_US}.*_fast${T_POST_LBL}$/o # primops
599 || /^${T_US}.*_closure_tbl${T_POST_LBL}$/o # closure tables
600 || /^_uname:/o; # x86/Solaris2
602 $chkcat[$i] = 'misc';
605 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && (
607 || /^\.section __TEXT,__picsymbol_stub1,.*/
609 || /^\.section __TEXT,__symbol_stub1,.*/
610 || /^\.lazy_symbol_pointer/
611 || /^\.non_lazy_symbol_pointer/ ))
614 $chkcat[$i] = 'dyld';
616 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && /^\.data/ && $chkcat[$i] eq '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 $c = &hppa_mash_prologue($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/^\tmovl\s+\%esi,\s*\d*\(\%esp\)\n//;
676 $p =~ s/^\tmovl\s+\%edi,\s*\d*\(\%esp\)\n//;
677 $p =~ s/^\tsubl\s+\$\d+,\s*\%esp\n//;
678 $p =~ s/^\tmovl\s+\$\d+,\s*\%eax\n\tcall\s+__alloca\n// if ($TargetPlatform =~ /^.*-cygwin32/);
680 # GCC 3.1 is in the habit of adding spurious writes to the
681 # stack in the prologue. Just to be on the safe side,
682 # chuck these over the fence into the main code.
683 while ($p =~ /^\tmovl\s+\$\d+,\s*\d*\(\%esp\)\n/) {
684 # print "Spurious instruction: $&";
689 } elsif ($TargetPlatform =~ /^ia64-/) {
690 $p =~ s/^\t\.prologue .*\n//;
691 $p =~ s/^\t\.save ar\.pfs, r\d+\n\talloc r\d+ = ar\.pfs, 0, 3[12], \d+, 0\n//;
692 $p =~ s/^\t\.fframe \d+\n\tadds r12 = -\d+, r12\n//;
693 $p =~ s/^\t\.save rp, r\d+\n\tmov r\d+ = b0\n//;
694 $p =~ s/^\t\.(mii|mmi)\n//g; # bundling is no longer sensible
695 $p =~ s/^\t;;\n//g; # discard stops
696 $p =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
698 # GCC 3.3 saves r1 in the prologue, move this to the body
699 if ($p =~ /^\tmov r\d+ = r1\n/) {
703 } elsif ($TargetPlatform =~ /^m68k-/) {
704 $p =~ s/^\tlink a6,#-?\d.*\n//;
705 $p =~ s/^\tpea a6@\n\tmovel sp,a6\n//;
706 # The above showed up in the asm code,
707 # so I added it here.
708 # I hope it's correct.
710 $p =~ s/^\tmovel d2,sp\@-\n//;
711 $p =~ s/^\tmovel d5,sp\@-\n//; # SMmark.* only?
712 $p =~ s/^\tmoveml \#0x[0-9a-f]+,sp\@-\n//; # SMmark.* only?
713 } elsif ($TargetPlatform =~ /^mips-/) {
714 # the .frame/.mask/.fmask that we use is the same
715 # as that produced by GCC for miniInterpret; this
716 # gives GDB some chance of figuring out what happened
717 $FRAME = "\t.frame\t\$sp,2168,\$31\n\t.mask\t0x90000000,-4\n\t.fmask\t0x00000000,0\n";
718 $p =~ s/^\t\.(frame).*\n/__FRAME__/g;
719 $p =~ s/^\t\.(mask|fmask).*\n//g;
720 $p =~ s/^\t\.cprestore.*\n/\t\.cprestore 416\n/; # 16 + 100 4-byte args
721 $p =~ s/^\tsubu\t\$sp,\$sp,\d+\n//;
722 $p =~ s/^\tsw\t\$31,\d+\(\$sp\)\n//;
723 $p =~ s/^\tsw\t\$fp,\d+\(\$sp\)\n//;
724 $p =~ s/^\tsw\t\$28,\d+\(\$sp\)\n//;
725 $p =~ s/__FRAME__/$FRAME/;
726 } elsif ($TargetPlatform =~ /^powerpc-apple-.*/) {
728 $pcrel_label =~ s/(.|\n)*^(L\d+\$pb):\n(.|\n)*/$2/ or $pcrel_label = "";
730 $p =~ s/^\tmflr r0\n//;
731 $p =~ s/^\tbl saveFP # f\d+\n//;
732 $p =~ s/^\tbl saveFP ; save f\d+-f\d+\n//;
733 $p =~ s/^L\d+\$pb:\n//;
734 $p =~ s/^\tstmw r\d+,-\d+\(r1\)\n//;
735 $p =~ s/^\tstfd f\d+,-\d+\(r1\)\n//g;
736 $p =~ s/^\tstw r0,\d+\(r1\)\n//g;
737 $p =~ s/^\tstwu r1,-\d+\(r1\)\n//;
738 $p =~ s/^\tstw r\d+,-\d+\(r1\)\n//g;
739 $p =~ s/^\tbcl 20,31,L\d+\$pb\n//;
740 $p =~ s/^L\d+\$pb:\n//;
741 $p =~ s/^\tmflr r31\n//;
743 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
744 # under some circumstances, only when generating position dependent code.
745 # I have no idea why, and I don't think it is necessary, so let's toss it.
746 $p =~ s/^\tli r\d+,0\n//g;
747 $p =~ s/^\tstw r\d+,\d+\(r1\)\n//g;
749 print STDERR "$Pgm: unknown prologue mangling? $TargetPlatform\n";
752 # HWL HACK: dont die, just print a warning
753 #print stderr "HWL: this should die! Prologue junk?: $p\n" if $p =~ /^\t[^\.]/;
754 die "Prologue junk?: $p\n" if $p =~ /^\s+[^\s\.]/;
756 if ($TargetPlatform =~ /^powerpc-apple-.*/ && $pcrel_label ne "") {
757 # on PowerPC, we have to keep a part of the prologue
758 # (which loads the current instruction pointer into register r31)
759 $p .= "bcl 20,31,$pcrel_label\n";
760 $p .= "$pcrel_label:\n";
761 $p .= "\tmflr r31\n";
764 # glue together what's left
769 if ( $TargetPlatform =~ /^mips-/ ) {
770 # MIPS: first, this basic sequence may occur "--- END ---" or not
771 $c =~ s/^\tlw\t\$31,\d+\(\$sp\)\n\taddu\t\$sp,\$sp,\d+\n\tj\t\$31\n\t\.end/\t\.end/;
774 # toss all epilogue stuff; again, paranoidly
775 if ( $c =~ /--- END ---/ ) {
776 if (($r, $e) = split(/--- END ---/, $c)) {
777 if ($TargetPlatform =~ /^i386-/) {
779 $e =~ s/^\tpopl\s+\%edi\n//;
780 $e =~ s/^\tpopl\s+\%esi\n//;
781 $e =~ s/^\tpopl\s+\%edx\n//;
782 $e =~ s/^\tpopl\s+\%ecx\n//;
783 $e =~ s/^\taddl\s+\$\d+,\s*\%esp\n//;
784 $e =~ s/^\tsubl\s+\$-\d+,\s*\%esp\n//;
785 } elsif ($TargetPlatform =~ /^ia64-/) {
786 $e =~ s/^\tmov ar\.pfs = r\d+\n//;
787 $e =~ s/^\tmov b0 = r\d+\n//;
788 $e =~ s/^\t\.restore sp\n\tadds r12 = \d+, r12\n//;
789 $e =~ s/^\tbr\.ret\.sptk\.many b0\n//;
790 $e =~ s/^\t\.(mii|mmi|mib)\n//g; # bundling is no longer sensible
791 $e =~ s/^\t;;\n//g; # discard stops - stop at end of body is sufficient
792 $e =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
793 } elsif ($TargetPlatform =~ /^m68k-/) {
794 $e =~ s/^\tunlk a6\n//;
796 } elsif ($TargetPlatform =~ /^mips-/) {
797 $e =~ s/^\tlw\t\$31,\d+\(\$sp\)\n//;
798 $e =~ s/^\tlw\t\$fp,\d+\(\$sp\)\n//;
799 $e =~ s/^\taddu\t\$sp,\$sp,\d+\n//;
800 $e =~ s/^\tj\t\$31\n//;
801 } elsif ($TargetPlatform =~ /^powerpc-apple-.*/) {
802 $e =~ s/^\taddi r1,r1,\d+\n//;
803 $e =~ s/^\tcal r1,\d+\(r1\)\n//;
804 $e =~ s/^\tlw?z? r\d+,\d+\(r1\)\n//;
805 $e =~ s/^\tmtlr r0\n//;
808 print STDERR "$Pgm: unknown epilogue mangling? $TargetPlatform\n";
811 print STDERR "WARNING: Epilogue junk?: $e\n" if $e =~ /^\t\s*[^\.\s\n]/;
813 # glue together what's left
815 $c =~ s/\n\t\n/\n/; # junk blank line
819 # On SPARCs, we don't do --- BEGIN/END ---, we just
820 # toss the register-windowing save/restore/ret* instructions
822 if ( $TargetPlatform =~ /^sparc-/ ) {
823 $c =~ s/^\t(save.*|restore.*|ret|retl)\n//g;
824 # throw away PROLOGUE comments
825 $c =~ s/^\t!#PROLOGUE# 0\n\t!#PROLOGUE# 1\n//;
828 # On Alphas, the prologue mangling is done a little later (below)
830 # toss all calls to __DISCARD__
831 $c =~ s/^\t(call|jbsr|jal)\s+${T_US}__DISCARD__\n//go;
832 $c =~ s/^\tjsr\s+\$26\s*,\s*${T_US}__DISCARD__\n//go if $TargetPlatform =~ /^alpha-/;
833 $c =~ s/^\tbl\s+L___DISCARD__\$stub\n//go if $TargetPlatform =~ /^powerpc-apple-.*/;
835 # IA64: mangle tailcalls into jumps here
836 if ($TargetPlatform =~ /^ia64-/) {
837 while ($c =~ s/^\tbr\.call\.sptk\.many b0 = (.*)\n(?:^\.L([0-9]*):\n)?(?:\t;;\n)?(?:\tmov r1 = r\d+\n)?(?:\t;;\n)?\t--- TAILCALL ---\n(?:\t;;\n\tbr \.L\d+\n)?/\tbr\.few $1\n/) {
838 # Eek, the gcc optimiser is getting smarter... if we see a jump to the --- TAILCALL ---
839 # marker then we reapply the substitution at the source sites
840 $c =~ s/^\tbr \.L$2\n/\t--- TAILCALL ---\n/g if ($2);
844 # MIPS: that may leave some gratuitous asm macros around
845 # (no harm done; but we get rid of them to be tidier)
846 $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/
847 if $TargetPlatform =~ /^mips-/;
849 # toss stack adjustment after DoSparks
850 $c =~ s/^(\tjbsr _DoSparks\n)\taddqw #8,sp/$1/g
851 if $TargetPlatform =~ /^m68k-/; # this looks old...
853 if ( $TargetPlatform =~ /^alpha-/ &&
854 ! $magic_rdata_seen &&
855 $c =~ /^\s*\.rdata\n\t\.quad 0\n\t\.align \d\n/ ) {
856 $c =~ s/^\s*\.rdata\n\t\.quad 0\n\t\.align (\d)\n/\.rdata\n\t\.align $1\n/;
857 $magic_rdata_seen = 1;
860 # pick some end-things and move them to the next chunk
862 # pin a funny end-thing on (for easier matching):
863 $c .= 'FUNNY#END#THING';
865 while ( $c =~ /${T_MOVE_DIRVS}FUNNY#END#THING/o ) {
869 # on x86 we try not to copy any directives into a literal
870 # chunk, rather we keep looking for the next real chunk. This
871 # is because we get things like
873 # .globl blah_closure
879 if ( $TargetPlatform =~ /^(i386|sparc|powerpc)/ && $to_move =~ /${T_COPY_DIRVS}/ ) {
881 while ( $j < $numchks && $chk[$j] =~ /$T_CONST_LBL/) {
884 if ( $j < $numchks ) {
885 $chk[$j] = $to_move . $chk[$j];
889 elsif ( $i < ($numchks - 1)
890 && ( $to_move =~ /${T_COPY_DIRVS}/
891 || ($TargetPlatform =~ /^hppa/ && $to_move =~ /align/ && $chkcat[$i+1] eq 'literal') )) {
892 $chk[$i + 1] = $to_move . $chk[$i + 1];
893 # otherwise they're tossed
896 $c =~ s/${T_MOVE_DIRVS}FUNNY#END#THING/FUNNY#END#THING/o;
899 if ( $TargetPlatform =~ /^alpha-/ && $c =~ /^\t\.ent\s+(\S+)/ ) {
901 # toss all prologue stuff, except for loading gp, and the ..ng address
902 unless ($c =~ /\.ent.*\n\$.*\.\.ng:/) {
903 if (($p, $r) = split(/^\t\.prologue/, $c)) {
904 if (($keep, $junk) = split(/\.\.ng:/, $p)) {
905 $keep =~ s/^\t\.frame.*\n/\t.frame \$30,0,\$26,0\n/;
906 $keep =~ s/^\t\.(mask|fmask).*\n//g;
907 $c = $keep . "..ng:\n";
909 print STDERR "malformed code block ($ent)?\n"
912 $c .= "\t.prologue" . $r;
916 $c =~ s/FUNNY#END#THING//;
918 # print STDERR "\nCHK $i (AFTER) (",$chkcat[$i],"):\n", $c;
920 $chk[$i] = $c; # update w/ convenience copy
923 # open CHUNKS, ">/tmp/chunks2" or die "Cannot open /tmp/chunks2: $!\n";
924 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
927 if ( $TargetPlatform =~ /^alpha-/ ) {
928 # print out the header stuff first
929 $chk[0] =~ s/^(\t\.file.*)"(ghc\d+\.c)"/$1"$ifile_root.hc"/;
930 print OUTASM $chk[0];
932 } elsif ( $TargetPlatform =~ /^hppa/ ) {
933 print OUTASM $chk[0];
935 } elsif ( $TargetPlatform =~ /^mips-/ ) {
936 $chk[0] = "\t\.file\t1 \"$ifile_root.hc\"\n" . $chk[0];
938 # get rid of horrible "<dollar>Revision: .*$" strings
939 local(@lines0) = split(/\n/, $chk[0]);
941 while ( $z <= $#lines0 ) {
942 if ( $lines0[$z] =~ /^\t\.byte\t0x24,0x52,0x65,0x76,0x69,0x73,0x69,0x6f$/ ) {
945 while ( $z <= $#lines0 ) {
947 last if $lines0[$z] =~ /[,\t]0x0$/;
953 $chk[0] = join("\n", @lines0);
954 $chk[0] =~ s/\n\n+/\n/;
955 print OUTASM $chk[0];
958 # print out all the literal strings next
959 for ($i = 0; $i < $numchks; $i++) {
960 if ( $chkcat[$i] eq 'literal' ) {
961 print OUTASM $T_HDR_literal, $chk[$i];
962 print OUTASM "; end literal\n" if $TargetPlatform =~ /^hppa/; # for the splitter
964 $chkcat[$i] = 'DONE ALREADY';
968 # on the HPPA, print out all the bss next
969 if ( $TargetPlatform =~ /^hppa/ ) {
970 for ($i = 1; $i < $numchks; $i++) {
971 if ( $chkcat[$i] eq 'bss' ) {
972 print OUTASM "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$BSS\$\n\t.align 4\n";
973 print OUTASM $chk[$i];
975 $chkcat[$i] = 'DONE ALREADY';
980 for ($i = $FIRST_MANGLABLE; $i < $numchks; $i++) {
981 # print STDERR "$i: cat $chkcat[$i], symb $chksymb[$i]\n";
983 next if $chkcat[$i] eq 'DONE ALREADY';
985 if ( $chkcat[$i] eq 'misc' ) {
986 if ($chk[$i] ne '') {
987 print OUTASM $T_HDR_misc;
988 &print_doctored($chk[$i], 0);
991 } elsif ( $chkcat[$i] eq 'toss' ) {
992 print STDERR "*** NB: TOSSING code for $chksymb[$i] !!! ***\n";
994 } elsif ( $chkcat[$i] eq 'data' ) {
995 if ($chk[$i] ne '') {
996 print OUTASM $T_HDR_data;
997 print OUTASM $chk[$i];
1000 } elsif ( $chkcat[$i] eq 'consist' ) {
1001 if ( $chk[$i] =~ /$T_hsc_cc_PAT/o ) {
1002 local($consist) = "$1.$2.$3";
1003 $consist =~ s/,/./g;
1004 $consist =~ s/\//./g;
1005 $consist =~ s/-/_/g;
1006 $consist =~ s/[^A-Za-z0-9_.]/ZZ/g; # ToDo: properly?
1008 # Using a cygnus-2.7-96q4 gcc build on hppas, the
1009 # consistency chunk for ghc_cc_ID often (but not always!)
1010 # gets lumped with a bunch of .IMPORT directives containing info on
1011 # the code or data space nature of external symbols. We can't
1012 # toss these, so once the consistency ID has been turned into
1013 # a representable symbol, we substitute it for the symbol
1014 # that the string was attached to in the first place (ghc_cc_ID.)
1015 # (The original string is also substituted away.)
1017 # This change may affect the code output on other platforms in
1018 # adverse ways, hence we restrict this hack hppa targets only.
1021 if ( $TargetPlatform =~ /^hppa/ ) {
1022 $chk[$i] =~ s/^${T_US}ghc.*c_ID$TPOSTLBL/$consist/o;
1023 $chk[$i] =~ s/\t$T_hsc_cc_PAT/$T_HDR_misc/o;
1024 $consist = $chk[$i]; #clumsily
1026 print OUTASM $T_HDR_consist, "${consist}${T_POST_LBL}\n";
1028 } elsif ( $TargetPlatform !~ /^(mips)-/ ) { # we just don't try in those case (ToDo)
1029 # on mips: consistency string is just a v
1030 # horrible bunch of .bytes,
1031 # which I am too lazy to sort out (WDP 95/05)
1033 print STDERR "Couldn't grok consistency: ", $chk[$i];
1036 } elsif ( $chkcat[$i] eq 'splitmarker' ) {
1037 # we can just re-constitute this one...
1038 # NB: we emit _three_ underscores no matter what,
1039 # so ghc-split doesn't have to care.
1040 print OUTASM "___stg_split_marker",$chksymb[$i],"${T_POST_LBL}\n";
1042 } elsif ( $chkcat[$i] eq 'closure'
1043 || $chkcat[$i] eq 'srt'
1044 || $chkcat[$i] eq 'infotbl'
1045 || $chkcat[$i] eq 'entry') { # do them in that order
1046 $symb = $chksymb[$i];
1049 if ( defined($closurechk{$symb}) ) {
1050 print OUTASM $T_HDR_closure;
1051 print OUTASM $chk[$closurechk{$symb}];
1052 $chkcat[$closurechk{$symb}] = 'DONE ALREADY';
1056 if ( defined($srtchk{$symb}) ) {
1057 print OUTASM $T_HDR_srt;
1058 print OUTASM $chk[$srtchk{$symb}];
1059 $chkcat[$srtchk{$symb}] = 'DONE ALREADY';
1063 if ( defined($infochk{$symb}) ) {
1065 print OUTASM $T_HDR_info;
1066 print OUTASM &rev_tbl($symb, $chk[$infochk{$symb}], 1);
1068 # entry code will be put here!
1070 $chkcat[$infochk{$symb}] = 'DONE ALREADY';
1074 if ( defined($entrychk{$symb}) ) {
1076 $c = $chk[$entrychk{$symb}];
1078 print OUTASM $T_HDR_entry;
1080 &print_doctored($c, 1); # NB: the 1!!!
1082 $chkcat[$entrychk{$symb}] = 'DONE ALREADY';
1085 } elsif ( $chkcat[$i] eq 'vector'
1086 || $chkcat[$i] eq 'direct' ) { # do them in that order
1087 $symb = $chksymb[$i];
1090 if ( defined($vectorchk{$symb}) ) {
1091 print OUTASM $T_HDR_vector;
1092 print OUTASM &rev_tbl($symb, $chk[$vectorchk{$symb}], 0);
1094 # direct return code will be put here!
1095 $chkcat[$vectorchk{$symb}] = 'DONE ALREADY';
1097 } elsif ( $TargetPlatform =~ /^alpha-/ ) {
1098 # Alphas: the commented nop is for the splitter, to ensure
1099 # that no module ends with a label as the very last
1100 # thing. (The linker will adjust the label to point
1101 # to the first code word of the next module linked in,
1102 # even if alignment constraints cause the label to move!)
1104 print OUTASM "\t# nop\n";
1107 } elsif ( $chkcat[$i] eq 'toc' ) {
1108 # silly optimisation to print tocs, since they come in groups...
1109 print OUTASM $T_HDR_toc;
1111 while ($chkcat[$j] eq 'toc')
1112 { if ( $chk[$j] !~ /\.tc UpdatePAP\[TC\]/ # not needed: always turned into a jump.
1115 print OUTASM $chk[$j];
1117 $chkcat[$j] = 'DONE ALREADY';
1121 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && $chkcat[$i] eq 'dyld' ) {
1122 # powerpc-apple: dynamic linker stubs
1123 if($chk[$i] !~ /\.indirect_symbol ___DISCARD__/)
1124 { # print them out unchanged, but remove the stubs for __DISCARD__
1125 print OUTASM $chk[$i];
1128 &tidy_up_and_die(1,"$Pgm: unknown chkcat (ghc-asm: $TargetPlatform)\n$chkcat[$i]\n$chk[$i]\n");
1132 print OUTASM $EXTERN_DECLS if $TargetPlatform =~ /^mips-/;
1135 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1136 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1141 sub hppa_mash_prologue { # OK, epilogue, too
1144 # toss all prologue stuff
1145 s/^\s+\.ENTRY[^\0]*--- BEGIN ---/\t.ENTRY/;
1147 # Lie about our .CALLINFO
1148 s/^\s+\.CALLINFO.*$/\t.CALLINFO NO_CALLS,NO_UNWIND/;
1155 # toss all epilogue stuff
1156 s/^\s+--- END ---[^\0]*\.EXIT/\t.EXIT/;
1158 # Sorry; we moved the _info stuff to the code segment.
1159 s/_info,DATA/_info,CODE/g;
1166 sub print_doctored {
1167 local($_, $need_fallthru_patch) = @_;
1169 if ( $TargetPlatform !~ /^i386-/
1170 || ! /^\t[a-z]/ # no instructions in here, apparently
1171 || /^${T_US}__stginit_[A-Za-z0-9_]+${T_POST_LBL}/) {
1175 # OK, must do some x86 **HACKING**
1177 local($entry_patch) = '';
1178 local($exit_patch) = '';
1180 # gotta watch out for weird instructions that
1181 # invisibly smash various regs:
1182 # rep* %ecx used for counting
1183 # scas* %edi used for destination index
1184 # cmps* %e[sd]i used for indices
1185 # loop* %ecx used for counting
1190 # * use of STG reg [ nn(%ebx) ] where no machine reg avail
1192 # * GCC used an "STG reg" for its own purposes
1194 # * some secret uses of machine reg, requiring STG reg
1195 # to be saved/restored
1197 # The most dangerous "GCC uses" of an "STG reg" are when
1198 # the reg holds the target of a jmp -- it's tricky to
1199 # insert the patch-up code before we get to the target!
1200 # So here we change the jmps:
1202 # --------------------------------------------------------
1203 # it can happen that we have jumps of the form...
1204 # jmp *<something involving %esp>
1206 # jmp <something involving another naughty register...>
1208 # a reasonably-common case is:
1210 # movl $_blah,<bad-reg>
1214 s/^\tmovl\s+\$${T_US}(.*),\s*(\%e[abcd]x)\n\tjmp\s+\*\2/\tjmp $T_US$1/g;
1216 if ($StolenX86Regs <= 2 ) { # YURGH! spurious uses of esi?
1217 s/^\tmovl\s+(.*),\s*\%esi\n\tjmp\s+\*%esi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1218 s/^\tjmp\s+\*(.*\(.*\%esi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1219 s/^\tjmp\s+\*\%esi\n/\tmovl \%esi,\%eax\n\tjmp \*\%eax\n/g;
1220 die "$Pgm: (mangler) still have jump involving \%esi!\n$_"
1221 if /(jmp|call)\s+.*\%esi/;
1223 if ($StolenX86Regs <= 3 ) { # spurious uses of edi?
1224 s/^\tmovl\s+(.*),\s*\%edi\n\tjmp\s+\*%edi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1225 s/^\tjmp\s+\*(.*\(.*\%edi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1226 s/^\tjmp\s+\*\%edi\n/\tmovl \%edi,\%eax\n\tjmp \*\%eax\n/g;
1227 die "$Pgm: (mangler) still have jump involving \%edi!\n$_"
1228 if /(jmp|call)\s+.*\%edi/;
1231 # OK, now we can decide what our patch-up code is going to
1234 # Offsets into register table - you'd better update these magic
1235 # numbers should you change its contents!
1236 # local($OFFSET_R1)=0; No offset for R1 in new RTS.
1237 local($OFFSET_Hp)=88;
1239 # Note funky ".=" stuff; we're *adding* to these _patch guys
1240 if ( $StolenX86Regs <= 2
1241 && ( /[^0-9]\(\%ebx\)/ || /\%esi/ || /^\tcmps/ ) ) { # R1 (esi)
1242 $entry_patch .= "\tmovl \%esi,(\%ebx)\n";
1243 $exit_patch .= "\tmovl (\%ebx),\%esi\n";
1245 # nothing for call_{entry,exit} because %esi is callee-save
1247 if ( $StolenX86Regs <= 3
1248 && ( /${OFFSET_Hp}\(\%ebx\)/ || /\%edi/ || /^\t(scas|cmps)/ ) ) { # Hp (edi)
1249 $entry_patch .= "\tmovl \%edi,${OFFSET_Hp}(\%ebx)\n";
1250 $exit_patch .= "\tmovl ${OFFSET_Hp}(\%ebx),\%edi\n";
1252 # nothing for call_{entry,exit} because %edi is callee-save
1255 # --------------------------------------------------------
1256 # next, here we go with non-%esp patching!
1258 s/^(\t[a-z])/$entry_patch$1/; # before first instruction
1260 # Before calling GC we must set up the exit condition before the call
1261 # and entry condition when we come back
1263 # fix _all_ non-local jumps:
1265 s/^\tjmp\s+\*${T_X86_PRE_LLBL_PAT}/\tJMP___SL/go;
1266 s/^\tjmp\s+${T_X86_PRE_LLBL_PAT}/\tJMP___L/go;
1268 s/^(\tjmp\s+.*\n)/$exit_patch$1/g; # here's the fix...
1270 s/^\tJMP___SL/\tjmp \*${T_X86_PRE_LLBL}/go;
1271 s/^\tJMP___L/\tjmp ${T_X86_PRE_LLBL}/go;
1273 if ($StolenX86Regs == 2 ) {
1274 die "ARGH! Jump uses \%esi or \%edi with -monly-2-regs:\n$_"
1275 if /^\t(jmp|call)\s+.*\%e(si|di)/;
1276 } elsif ($StolenX86Regs == 3 ) {
1277 die "ARGH! Jump uses \%edi with -monly-3-regs:\n$_"
1278 if /^\t(jmp|call)\s+.*\%edi/;
1281 # --------------------------------------------------------
1282 # that's it -- print it
1284 #die "Funny jumps?\n$_" if /${T_X86_BADJMP}/o; # paranoia
1288 if ( $need_fallthru_patch ) { # exit patch for end of slow entry code
1289 print OUTASM $exit_patch;
1290 # ToDo: make it not print if there is a "jmp" at the end
1296 sub init_FUNNY_THINGS {
1297 %KNOWN_FUNNY_THING = (
1299 # "${T_US}stg_.*{T_POST_LBL}", 1,
1304 The following table reversal is used for both info tables and return
1305 vectors. In both cases, we remove the first entry from the table,
1306 reverse the table, put the label at the end, and paste some code
1307 (that which is normally referred to by the first entry in the table)
1308 right after the table itself. (The code pasting is done elsewhere.)
1312 local($symb, $tbl, $discard1) = @_;
1314 return ($tbl) if ($TargetPlatform =~ /^ia64-/);
1316 local($before) = '';
1318 local(@imports) = (); # hppa only
1321 local(@lines) = split(/\n/, $tbl);
1324 # Deal with the header...
1325 for ($i = 0; $i <= $#lines && $lines[$i] !~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1326 $label .= $lines[$i] . "\n",
1327 next if $lines[$i] =~ /^[A-Za-z0-9_]+_info${T_POST_LBL}$/o
1328 || $lines[$i] =~ /${T_DOT_GLOBAL}/o
1329 || $lines[$i] =~ /^${T_US}\S+_vtbl${T_POST_LBL}$/o;
1331 $before .= $lines[$i] . "\n"; # otherwise...
1334 # Grab the table data...
1335 if ( $TargetPlatform !~ /^hppa/ ) {
1336 for ( ; $i <= $#lines && $lines[$i] =~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1337 push(@words, $lines[$i]);
1339 } else { # hppa weirdness
1340 for ( ; $i <= $#lines && $lines[$i] =~ /^\s+(${T_DOT_WORD}|\.IMPORT)/; $i++) {
1341 if ($lines[$i] =~ /^\s+\.IMPORT/) {
1342 push(@imports, $lines[$i]);
1344 # We don't use HP's ``function pointers''
1345 # We just use labels in code space, like normal people
1346 $lines[$i] =~ s/P%//;
1347 push(@words, $lines[$i]);
1352 # Now throw away any initial zero word from the table. This is a hack
1353 # that lets us reduce the size of info tables when the SRT field is not
1354 # needed: see comments StgFunInfoTable in InfoTables.h.
1356 # The .zero business is for Linux/ELF.
1357 # The .skip business is for Sparc/Solaris/ELF.
1358 # The .blockz business is for HPPA.
1360 # if ($words[0] =~ /^\t?(${T_DOT_WORD}\s+0|\.zero\s+4|\.skip\s+4|\.blockz\s+4)/) {
1365 for (; $i <= $#lines; $i++) {
1366 $after .= $lines[$i] . "\n";
1369 # Alphas: If we have anonymous text (not part of a procedure), the
1370 # linker may complain about missing exception information. Bleh.
1371 # To suppress this, we place a .ent/.end pair around the code.
1372 # At the same time, we have to be careful and not enclose any leading
1373 # .file/.loc directives.
1374 if ( $TargetPlatform =~ /^alpha-/ && $label =~ /^([A-Za-z0-9_]+):$/) {
1375 local ($ident) = $1;
1376 $before =~ s/^((\s*\.(file|loc)\s+[^\n]*\n)*)/$1\t.ent $ident\n/;
1377 $after .= "\t.end $ident\n";
1380 # Alphas: The heroic Simon Marlow found a bug in the Digital UNIX
1381 # assembler (!) wherein .quad constants inside .text sections are
1382 # first narrowed to 32 bits then sign-extended back to 64 bits.
1383 # This obviously screws up our 64-bit bitmaps, so we work around
1384 # the bug by replacing .quad with .align 3 + .long + .long [ccshan]
1385 if ( $TargetPlatform =~ /^alpha-/ ) {
1387 if (/^\s*\.quad\s+([-+0-9].*\S)\s*$/ && length $1 >= 10) {
1388 local ($number) = $1;
1389 if ($number =~ /^([-+])?(0x?)?([0-9]+)$/) {
1390 local ($sign, $base, $digits) = ($1, $2, $3);
1391 $base = (10, 8, 16)[length $base];
1392 local ($hi, $lo) = (0, 0);
1393 foreach $i (split(//, $digits)) {
1394 $j = $lo * $base + $i;
1395 $lo = $j % 4294967296;
1396 $hi = $hi * $base + ($j - $lo) / 4294967296;
1398 ($hi, $lo) = (4294967295 - $hi, 4294967296 - $lo)
1400 $_ = "\t.align 3\n\t.long $lo\n\t.long $hi\n";
1401 # printf STDERR "TURNING %s into 0x %08x %08x\n", $number, $hi, $lo;
1403 print STDERR "Cannot handle \".quad $number\" in info table\n";
1411 . (($TargetPlatform !~ /^hppa/) ? '' : join("\n", @imports) . "\n")
1412 . join("\n", @words) . "\n"
1415 # print STDERR "before=$before\n";
1416 # print STDERR "label=$label\n";
1417 # print STDERR "words=",(reverse @words),"\n";
1418 # print STDERR "after=$after\n";
1424 The HP is a major nuisance. The threaded code mangler moved info
1425 tables from data space to code space, but unthreaded code in the RTS
1426 still has references to info tables in data space. Since the HP
1427 linker is very precise about where symbols live, we need to patch the
1428 references in the unthreaded RTS as well.
1431 sub mini_mangle_asm_hppa {
1432 local($in_asmf, $out_asmf) = @_;
1434 open(INASM, "< $in_asmf")
1435 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
1436 open(OUTASM,"> $out_asmf")
1437 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
1440 s/_info,DATA/_info,CODE/; # Move _info references to code space
1446 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1447 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1453 sub tidy_up_and_die {
1454 local($return_val, $msg) = @_;
1456 exit (($return_val == 0) ? 0 : 1);