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_DOT_WORD = '\.(long|quad|byte|word)';
103 $T_DOT_GLOBAL = '^\t\.globl';
104 $T_HDR_literal = "\.rdata\n\t\.align 3\n";
105 $T_HDR_misc = "\.text\n\t\.align 3\n";
106 $T_HDR_data = "\.data\n\t\.align 3\n";
107 $T_HDR_rodata = "\.rdata\n\t\.align 3\n";
108 $T_HDR_closure = "\.data\n\t\.align 3\n";
109 $T_HDR_info = "\.text\n\t\.align 3\n";
110 $T_HDR_entry = "\.text\n\t\.align 3\n";
111 $T_HDR_vector = "\.text\n\t\.align 3\n";
113 #--------------------------------------------------------#
114 } elsif ( $TargetPlatform =~ /^hppa/ ) {
116 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
117 $T_US = ''; # _ if symbols have an underscore on the front
118 $T_PRE_APP = 'DONT THINK THIS APPLIES'; # regexp that says what comes before APP/NO_APP
119 $T_CONST_LBL = '^L\$C(\d+)$'; # regexp for what such a lbl looks like
122 $T_MOVE_DIRVS = '^((\s+\.(IMPORT|EXPORT|PARAM).*|\s+\.align\s+\d+|\s+\.(SPACE|SUBSPA)\s+\S+|\s*)\n)';
123 $T_COPY_DIRVS = '^\s+\.(IMPORT|EXPORT)';
125 $T_DOT_WORD = '\.(blockz|word|half|byte)';
126 $T_DOT_GLOBAL = '^\s+\.EXPORT';
127 $T_HDR_literal = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$LIT\$\n";
128 $T_HDR_misc = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
129 $T_HDR_data = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
130 $T_HDR_rodata = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
131 $T_HDR_closure = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
132 $T_HDR_info = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
133 $T_HDR_entry = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
134 $T_HDR_vector = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
136 #--------------------------------------------------------#
137 } elsif ( $TargetPlatform =~ /^i386-.*-(linuxaout|freebsd2|nextstep3|cygwin32|mingw32)$/ ) {
138 # NeXT added but not tested. CaS
140 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
141 $T_US = '_'; # _ if symbols have an underscore on the front
142 $T_PRE_APP = '^#'; # regexp that says what comes before APP/NO_APP
143 $T_CONST_LBL = '^LC(\d+):$';
145 $T_X86_PRE_LLBL_PAT = 'L';
146 $T_X86_PRE_LLBL = 'L';
147 $T_X86_BADJMP = '^\tjmp [^L\*]';
149 $T_MOVE_DIRVS = '^(\s*(\.(p2)?align\s+\d+(,0x90)?|\.globl\s+\S+|\.text|\.data|\.stab[^n].*|\.type\s+.*|\.size\s+.*|\.lcomm.*)\n)';
150 $T_COPY_DIRVS = '\.(globl|stab|lcomm)';
151 $T_DOT_WORD = '\.(long|word|value|byte|space)';
152 $T_DOT_GLOBAL = '\.globl';
153 $T_HDR_literal = "\.text\n\t\.align 2\n";
154 $T_HDR_misc = "\.text\n\t\.align 2,0x90\n";
155 $T_HDR_data = "\.data\n\t\.align 2\n";
156 $T_HDR_rodata = "\.text\n\t\.align 2\n";
157 $T_HDR_closure = "\.data\n\t\.align 2\n";
158 $T_HDR_info = "\.text\n\t\.align 2\n"; # NB: requires padding
159 $T_HDR_entry = "\.text\n"; # no .align so we're right next to _info (arguably wrong...?)
160 $T_HDR_vector = "\.text\n\t\.align 2\n"; # NB: requires padding
162 #--------------------------------------------------------#
163 } elsif ( $TargetPlatform =~ /^i386-.*-(solaris2|linux|freebsd|netbsd|openbsd)$/ ) {
165 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
166 $T_US = ''; # _ if symbols have an underscore on the front
167 $T_PRE_APP = # regexp that says what comes before APP/NO_APP
168 ($TargetPlatform =~ /-(linux|freebsd|netbsd)$/) ? '#' : '/' ;
169 $T_CONST_LBL = '^\.LC(\d+):$'; # regexp for what such a lbl looks like
171 $T_X86_PRE_LLBL_PAT = '\.L';
172 $T_X86_PRE_LLBL = '.L';
173 $T_X86_BADJMP = '^\tjmp\s+[^\.\*]';
175 $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)';
176 $T_COPY_DIRVS = '^\s*\.(globl|type|size|local)';
178 $T_DOT_WORD = '\.(long|value|word|byte|zero)';
179 $T_DOT_GLOBAL = '\.globl';
180 $T_HDR_literal = "\.section\t\.rodata\n"; # or just use .text??? (WDP 95/11)
181 $T_HDR_misc = "\.text\n\t\.align 4\n";
182 $T_HDR_data = "\.data\n\t\.align 4\n";
183 $T_HDR_rodata = "\.section\t\.rodata\n\t\.align 4\n";
184 $T_HDR_closure = "\.data\n\t\.align 4\n";
185 $T_HDR_info = "\.text\n\t\.align 4\n";
186 $T_HDR_entry = "\.text\n"; # no .align so we're right next to _info (arguably wrong...?)
187 $T_HDR_vector = "\.text\n\t\.align 4\n"; # NB: requires padding
189 #--------------------------------------------------------#
190 } elsif ( $TargetPlatform =~ /^ia64-.*-linux$/ ) {
192 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
193 $T_US = ''; # _ if symbols have an underscore on the front
195 $T_CONST_LBL = '^\.LC(\d+):$'; # regexp for what such a lbl looks like
198 $T_MOVE_DIRVS = '^(\s*\.(global|proc|pred\.safe_across_calls|text|data|section|subsection|align|size|type|ident)\s+.*\n)';
199 $T_COPY_DIRVS = '\.(global|proc)';
201 $T_DOT_WORD = '\.(long|value|byte|zero)';
202 $T_DOT_GLOBAL = '\.global';
203 $T_HDR_literal = "\.section\t\.rodata\n";
204 $T_HDR_misc = "\.text\n\t\.align 8\n";
205 $T_HDR_data = "\.data\n\t\.align 8\n";
206 $T_HDR_rodata = "\.section\t\.rodata\n\t\.align 8\n";
207 $T_HDR_closure = "\.data\n\t\.align 8\n";
208 $T_HDR_info = "\.text\n\t\.align 8\n";
209 $T_HDR_entry = "\.text\n\t\.align 16\n";
210 $T_HDR_vector = "\.text\n\t\.align 8\n";
212 #--------------------------------------------------------#
213 } elsif ( $TargetPlatform =~ /^x86_64-.*-(linux|openbsd)$/ ) {
215 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
216 $T_US = ''; # _ if symbols have an underscore on the front
218 $T_CONST_LBL = '^\.LC(\d+):$'; # regexp for what such a lbl looks like
221 $T_MOVE_DIRVS = '^(\s*\.(globl|text|data|section|align|size|type|ident|local)\s+.*\n)';
222 $T_COPY_DIRVS = '\.(globl|local)';
224 $T_DOT_WORD = '\.(quad|long|value|byte|zero)';
225 $T_DOT_GLOBAL = '\.global';
226 $T_HDR_literal = "\.section\t\.rodata\n";
227 $T_HDR_misc = "\.text\n\t\.align 8\n";
228 $T_HDR_data = "\.data\n\t\.align 8\n";
229 $T_HDR_rodata = "\.section\t\.rodata\n\t\.align 8\n";
230 $T_HDR_closure = "\.data\n\t\.align 8\n";
231 $T_HDR_info = "\.text\n\t\.align 8\n";
232 $T_HDR_entry = "\.text\n\t\.align 8\n";
233 $T_HDR_vector = "\.text\n\t\.align 8\n";
235 #--------------------------------------------------------#
236 } elsif ( $TargetPlatform =~ /^m68k-.*-sunos4/ ) {
238 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
239 $T_US = '_'; # _ if symbols have an underscore on the front
240 $T_PRE_APP = '^# MAY NOT APPLY'; # regexp that says what comes before APP/NO_APP
241 $T_CONST_LBL = '^LC(\d+):$';
244 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.proc\s+\d+|\.const|\.cstring|\.globl\s+\S+|\.text|\.data|\.even|\.stab[^n].*)\n)';
245 $T_COPY_DIRVS = '\.(globl|proc|stab)';
247 $T_DOT_WORD = '\.long';
248 $T_DOT_GLOBAL = '\.globl';
249 $T_HDR_literal = "\.text\n\t\.even\n";
250 $T_HDR_misc = "\.text\n\t\.even\n";
251 $T_HDR_data = "\.data\n\t\.even\n";
252 $T_HDR_rodata = "\.text\n\t\.even\n";
253 $T_HDR_closure = "\.data\n\t\.even\n";
254 $T_HDR_info = "\.text\n\t\.even\n";
255 $T_HDR_entry = "\.text\n\t\.even\n";
256 $T_HDR_vector = "\.text\n\t\.even\n";
258 #--------------------------------------------------------#
259 } elsif ( $TargetPlatform =~ /^mips-.*/ ) {
261 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
262 $T_US = ''; # _ if symbols have an underscore on the front
263 $T_PRE_APP = '^\s*#'; # regexp that says what comes before APP/NO_APP
264 $T_CONST_LBL = '^\$LC(\d+):$'; # regexp for what such a lbl looks like
267 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.(globl|ent)\s+\S+|\.text|\.r?data)\n)';
268 $T_COPY_DIRVS = '\.(globl|ent)';
270 $T_DOT_WORD = '\.word';
271 $T_DOT_GLOBAL = '^\t\.globl';
272 $T_HDR_literal = "\t\.rdata\n\t\.align 2\n";
273 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
274 $T_HDR_data = "\t\.data\n\t\.align 2\n";
275 $T_HDR_rodata = "\t\.rdata\n\t\.align 2\n";
276 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
277 $T_HDR_info = "\t\.text\n\t\.align 2\n";
278 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
279 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
281 #--------------------------------------------------------#
282 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ ) {
283 # Apple PowerPC Darwin/MacOS X.
284 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
285 $T_US = '_'; # _ if symbols have an underscore on the front
286 $T_PRE_APP = 'DOESNT APPLY'; # regexp that says what comes before APP/NO_APP
287 $T_CONST_LBL = '^\LC\d+:'; # regexp for what such a lbl looks like
290 $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 .*|\.lcomm.*)\n)';
291 $T_COPY_DIRVS = '\.(globl|lcomm)';
293 $T_DOT_WORD = '\.(long|short|byte|fill|space)';
294 $T_DOT_GLOBAL = '\.globl';
295 $T_HDR_toc = "\.toc\n";
296 $T_HDR_literal = "\t\.const_data\n\t\.align 2\n";
297 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
298 $T_HDR_data = "\t\.data\n\t\.align 2\n";
299 $T_HDR_rodata = "\t\.const_data\n\t\.align 2\n";
300 $T_HDR_closure = "\t\.const_data\n\t\.align 2\n";
301 $T_HDR_info = "\t\.text\n\t\.align 2\n";
302 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
303 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
305 #--------------------------------------------------------#
306 } elsif ( $TargetPlatform =~ /^powerpc-.*-linux/ ) {
308 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
309 $T_US = ''; # _ if symbols have an underscore on the front
310 $T_PRE_APP = '^#'; # regexp that says what comes before APP/NO_APP
311 $T_CONST_LBL = '^\.LC\d+:'; # regexp for what such a lbl looks like
314 $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)';
315 $T_COPY_DIRVS = '^\s*\.(globl|type|size|local)';
317 $T_DOT_WORD = '\.(long|short|byte|fill|space)';
318 $T_DOT_GLOBAL = '\.globl';
319 $T_HDR_toc = "\.toc\n";
320 $T_HDR_literal = "\t\.section\t.rodata\n\t\.align 2\n";
321 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
322 $T_HDR_data = "\t\.data\n\t\.align 2\n";
323 $T_HDR_rodata = "\t\.section\t.rodata\n\t\.align 2\n";
324 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
325 $T_HDR_info = "\t\.text\n\t\.align 2\n";
326 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
327 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
329 #--------------------------------------------------------#
330 } elsif ( $TargetPlatform =~ /^sparc-.*-(solaris2|openbsd)/ ) {
332 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
333 $T_US = ''; # _ if symbols have an underscore on the front
334 $T_PRE_APP = 'DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
335 $T_CONST_LBL = '^\.LLC(\d+):$'; # regexp for what such a lbl looks like
338 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.stab.*|\.section.*|\s+\.type.*|\s+\.size.*)\n)';
339 $T_COPY_DIRVS = '\.(global|proc|stab)';
341 $T_DOT_WORD = '\.(long|word|byte|half|skip|uahalf|uaword)';
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_rodata = "\.text\n\t\.align 4\n";
347 $T_HDR_closure = "\.data\n\t\.align 4\n";
348 $T_HDR_entry = "\.text\n\t\.align 4\n";
349 $T_HDR_vector = "\.text\n\t\.align 4\n";
351 #--------------------------------------------------------#
352 } elsif ( $TargetPlatform =~ /^sparc-.*-sunos4/ ) {
354 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
355 $T_US = '_'; # _ if symbols have an underscore on the front
356 $T_PRE_APP = '^# DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
357 $T_CONST_LBL = '^LC(\d+):$';
360 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.stab.*)\n)';
361 $T_COPY_DIRVS = '\.(global|proc|stab)';
363 $T_DOT_WORD = '\.word';
364 $T_DOT_GLOBAL = '^\t\.global';
365 $T_HDR_literal = "\.text\n\t\.align 8\n";
366 $T_HDR_misc = "\.text\n\t\.align 4\n";
367 $T_HDR_data = "\.data\n\t\.align 8\n";
368 $T_HDR_rodata = "\.text\n\t\.align 4\n";
369 $T_HDR_closure = "\.data\n\t\.align 4\n";
370 $T_HDR_info = "\.text\n\t\.align 4\n";
371 $T_HDR_entry = "\.text\n\t\.align 4\n";
372 $T_HDR_vector = "\.text\n\t\.align 4\n";
374 #--------------------------------------------------------#
375 } elsif ( $TargetPlatform =~ /^sparc-.*-linux/ ) {
376 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
377 $T_US = ''; # _ if symbols have an underscore on the front
378 $T_PRE_APP = '#'; # regexp that says what comes before APP/NO_APP
379 # Probably doesn't apply anyway
380 $T_CONST_LBL = '^\.LLC(\d+):$'; # regexp for what such a lbl looks like
383 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.seg|\.stab.*|\t?\.section.*|\s+\.type.*|\s+\.size.*)\n)';
384 $T_COPY_DIRVS = '\.(global|globl|proc|stab)';
386 $T_DOT_WORD = '\.(long|word|nword|xword|byte|half|short|skip|uahalf|uaword)';
387 $T_DOT_GLOBAL = '^\t\.global';
388 $T_HDR_literal = "\.text\n\t\.align 8\n";
389 $T_HDR_misc = "\.text\n\t\.align 4\n";
390 $T_HDR_data = "\.data\n\t\.align 8\n";
391 $T_HDR_rodata = "\.text\n\t\.align 4\n";
392 $T_HDR_closure = "\.data\n\t\.align 4\n";
393 $T_HDR_info = "\.text\n\t\.align 4\n";
394 $T_HDR_entry = "\.text\n\t\.align 4\n";
395 $T_HDR_vector = "\.text\n\t\.align 4\n";
397 #--------------------------------------------------------#
399 print STDERR "$Pgm: don't know how to mangle assembly language for: $TargetPlatform\n";
404 print STDERR "T_STABBY: $T_STABBY\n";
405 print STDERR "T_US: $T_US\n";
406 print STDERR "T_PRE_APP: $T_PRE_APP\n";
407 print STDERR "T_CONST_LBL: $T_CONST_LBL\n";
408 print STDERR "T_POST_LBL: $T_POST_LBL\n";
409 if ( $TargetPlatform =~ /^i386-/ ) {
410 print STDERR "T_X86_PRE_LLBL_PAT: $T_X86_PRE_LLBL_PAT\n";
411 print STDERR "T_X86_PRE_LLBL: $T_X86_PRE_LLBL\n";
412 print STDERR "T_X86_BADJMP: $T_X86_BADJMP\n";
414 print STDERR "T_MOVE_DIRVS: $T_MOVE_DIRVS\n";
415 print STDERR "T_COPY_DIRVS: $T_COPY_DIRVS\n";
416 print STDERR "T_DOT_WORD: $T_DOT_WORD\n";
417 print STDERR "T_HDR_literal: $T_HDR_literal\n";
418 print STDERR "T_HDR_misc: $T_HDR_misc\n";
419 print STDERR "T_HDR_data: $T_HDR_data\n";
420 print STDERR "T_HDR_rodata: $T_HDR_rodata\n";
421 print STDERR "T_HDR_closure: $T_HDR_closure\n";
422 print STDERR "T_HDR_info: $T_HDR_info\n";
423 print STDERR "T_HDR_entry: $T_HDR_entry\n";
424 print STDERR "T_HDR_vector: $T_HDR_vector\n";
430 %************************************************************************
432 \subsection{Mangle away}
434 %************************************************************************
438 local($in_asmf, $out_asmf) = @_;
440 # multi-line regexp matching:
445 &init_TARGET_STUFF();
446 &init_FUNNY_THINGS();
448 open(INASM, "< $in_asmf")
449 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
450 open(OUTASM,"> $out_asmf")
451 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
453 # read whole file, divide into "chunks":
454 # record some info about what we've found...
456 @chk = (); # contents of the chunk
457 $numchks = 0; # number of them
458 @chkcat = (); # what category of thing in each chunk
459 @chksymb = (); # what symbol(base) is defined in this chunk
460 %entrychk = (); # ditto, its entry code
461 %closurechk = (); # ditto, the (static) closure
462 %srtchk = (); # ditto, its SRT (for top-level things)
463 %infochk = (); # given a symbol base, say what chunk its info tbl is in
464 %vectorchk = (); # ditto, return vector table
465 $EXTERN_DECLS = ''; # .globl <foo> .text (MIPS only)
467 $i = 0; $chkcat[0] = 'misc'; $chk[0] = '';
470 tr/\r//d if $TargetPlatform =~ /-mingw32$/; # In case Perl doesn't convert line endings
471 next if $T_STABBY && /^\.stab.*${T_US}__stg_split_marker/o;
472 next if $T_STABBY && /^\.stab.*ghc.*c_ID/;
473 next if /^\t\.def.*endef$/;
474 next if /${T_PRE_APP}(NO_)?APP/o;
475 next if /^;/ && $TargetPlatform =~ /^hppa/;
477 next if /(^$|^\t\.file\t|^ # )/ && $TargetPlatform =~ /^(mips|ia64)-/;
479 if ( $TargetPlatform =~ /^mips-/
480 && /^\t\.(globl\S+\.text|comm\t)/ ) {
481 $EXTERN_DECLS .= $_ unless /(__DISCARD__|\b(PK_|ASSIGN_)(FLT|DBL)\b)/;
482 # Treat .comm variables as data. These show up in two (known) places:
484 # - the module_registered variable used in the __stginit fragment.
485 # even though these are declared static and initialised, gcc 3.3
486 # likes to make them .comm, presumably to save space in the
489 # - global variables used to pass arguments from C to STG in
490 # a foreign export. (is this still true? --SDM)
492 } elsif ( /^\t\.comm.*$/ ) {
494 $chkcat[$i] = 'data';
497 # Labels beginning "_c": these are literal strings.
498 } elsif ( /^${T_US}_c.*$/ ) {
500 $chkcat[$i] = 'rodata';
503 } elsif ( /^\s+/ ) { # most common case first -- a simple line!
504 # duplicated from the bottom
508 } elsif ( /\.\.ng:$/ && $TargetPlatform =~ /^alpha-/ ) {
509 # Alphas: Local labels not to be confused with new chunks
512 # NB: all the rest start with a non-space
514 } elsif ( $TargetPlatform =~ /^mips-/
515 && /^\d+:/ ) { # a funny-looking very-local label
518 } elsif ( /$T_CONST_LBL/o ) {
520 $chkcat[$i] = 'literal';
523 } elsif ( /^${T_US}__stg_split_marker(\d*)${T_POST_LBL}$/o ) {
525 $chkcat[$i] = 'splitmarker';
528 } elsif ( /^${T_US}([A-Za-z0-9_]+)_info${T_POST_LBL}$/o ) {
531 $chkcat[$i] = 'infotbl';
532 $chksymb[$i] = $symb;
534 die "Info table already? $symb; $i\n" if defined($infochk{$symb});
536 $infochk{$symb} = $i;
538 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(entry|ret)${T_POST_LBL}$/o ) {
540 $chkcat[$i] = 'entry';
545 } elsif ( /^${T_US}([A-Za-z0-9_]+)_closure${T_POST_LBL}$/o ) {
547 $chkcat[$i] = 'closure';
550 $closurechk{$1} = $i;
552 } elsif ( /^${T_US}([A-Za-z0-9_]+)_srt${T_POST_LBL}$/o ) {
559 } elsif ( /^${T_US}([A-Za-z0-9_]+)_ct${T_POST_LBL}$/o ) {
561 $chkcat[$i] = 'data';
564 } elsif ( /^(${T_US}__gnu_compiled_c|gcc2_compiled\.)${T_POST_LBL}/o ) {
567 } elsif ( /^${T_US}[A-Za-z0-9_]+\.\d+${T_POST_LBL}$/o
568 || /^${T_US}.*_CAT${T_POST_LBL}$/o # PROF: _entryname_CAT
569 || /^${T_US}.*_done${T_POST_LBL}$/o # PROF: _module_done
570 || /^${T_US}_module_registered${T_POST_LBL}$/o # PROF: _module_registered
573 $chkcat[$i] = 'data';
576 } elsif ( /^([A-Za-z0-9_]+)\s+\.comm/ && $TargetPlatform =~ /^hppa/ ) {
581 } elsif ( /^${T_US}([A-Za-z0-9_]+)_cc(s)?${T_POST_LBL}$/o ) {
582 # all CC_ symbols go in the data section...
584 $chkcat[$i] = 'data';
587 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(alt|dflt)${T_POST_LBL}$/o ) {
589 $chkcat[$i] = 'misc';
591 } elsif ( /^${T_US}([A-Za-z0-9_]+)_vtbl${T_POST_LBL}$/o ) {
593 $chkcat[$i] = 'vector';
598 } elsif ( $TargetPlatform =~ /^i386-.*-solaris2/
599 && /^[A-Za-z0-9][A-Za-z0-9_]*:/ ) {
600 # Some Solaris system headers contain function definitions (as
601 # opposed to mere prototypes), which end up in the .hc file when
602 # a Haskell module foreign imports the corresponding system
603 # functions (most notably stat()). We put them into the text
604 # segment. Note that this currently does not extend to function
605 # names starting with an underscore.
608 $chkcat[$i] = 'misc';
611 } elsif ( /^${T_US}[A-Za-z0-9_]/o
612 && ( $TargetPlatform !~ /^hppa/ # need to avoid local labels in this case
613 || ! /^L\$\d+$/ ) ) {
617 print STDERR "Warning: retaining unknown function \`$thing' in output from C compiler\n"
618 unless # $KNOWN_FUNNY_THING{$thing}
619 /^${T_US}stg_.*${T_POST_LBL}$/o # RTS internals
620 || /^${T_US}__stg_.*${T_POST_LBL}$/o # more RTS internals
621 || /^${T_US}__fexp_.*${T_POST_LBL}$/o # foreign export
622 || /^${T_US}.*_slow${T_POST_LBL}$/o # slow entry
623 || /^${T_US}__stginit.*${T_POST_LBL}$/o # __stginit<module>
624 || /^${T_US}.*_btm${T_POST_LBL}$/o # large bitmaps
625 || /^${T_US}.*_srtd${T_POST_LBL}$/o # large bitmaps
626 || /^${T_US}.*_fast${T_POST_LBL}$/o # primops
627 || /^${T_US}.*_closure_tbl${T_POST_LBL}$/o # closure tables
628 || /^_uname:/o; # x86/Solaris2
630 $chkcat[$i] = 'misc';
633 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && (
635 || /^\.section __TEXT,__picsymbol_stub1,.*/
637 || /^\.section __TEXT,__symbol_stub1,.*/
638 || /^\.lazy_symbol_pointer/
639 || /^\.non_lazy_symbol_pointer/ ))
642 $chkcat[$i] = 'dyld';
644 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && /^\.data/ && $chkcat[$i] eq 'dyld')
645 { # non_lazy_symbol_ptrs that point to local symbols
647 $chkcat[$i] = 'dyld';
649 } else { # simple line (duplicated at the top)
654 $numchks = $#chk + 1;
656 # open CHUNKS, ">/tmp/chunks1" or die "Cannot open /tmp/chunks1: $!\n";
657 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
660 # the division into chunks is imperfect;
661 # we throw some things over the fence into the next
664 # also, there are things we would like to know
665 # about the whole module before we start spitting
668 local($FIRST_MANGLABLE) = ($TargetPlatform =~ /^(alpha-|hppa|mips-)/) ? 1 : 0;
669 local($FIRST_TOSSABLE ) = ($TargetPlatform =~ /^(hppa|mips-)/) ? 1 : 0;
671 # print STDERR "first chunk to mangle: $FIRST_MANGLABLE\n";
673 # Alphas: NB: we start meddling at chunk 1, not chunk 0
674 # The first ".rdata" is quite magical; as of GCC 2.7.x, it
675 # spits a ".quad 0" in after the very first ".rdata"; we
676 # detect this special case (tossing the ".quad 0")!
677 local($magic_rdata_seen) = 0;
679 # HPPAs, MIPSen: also start medding at chunk 1
681 for ($i = $FIRST_TOSSABLE; $i < $numchks; $i++) {
682 $c = $chk[$i]; # convenience copy
684 # print STDERR "\nCHK $i (BEFORE) (",$chkcat[$i],"):\n", $c;
686 # toss all prologue stuff; HPPA is pretty weird
688 $c = &hppa_mash_prologue($c) if $TargetPlatform =~ /^hppa-/;
690 # be slightly paranoid to make sure there's
691 # nothing surprising in there
692 if ( $c =~ /--- BEGIN ---/ ) {
693 if (($p, $r) = split(/--- BEGIN ---/, $c)) {
695 # remove junk whitespace around the split point
699 if ($TargetPlatform =~ /^i386-/) {
700 $p =~ s/^\tpushl\s+\%edi\n//;
701 $p =~ s/^\tpushl\s+\%esi\n//;
702 $p =~ s/^\tpushl\s+\%ebx\n//;
703 $p =~ s/^\tmovl\s+\%esi,\s*\d*\(\%esp\)\n//;
704 $p =~ s/^\tmovl\s+\%edi,\s*\d*\(\%esp\)\n//;
705 $p =~ s/^\tsubl\s+\$\d+,\s*\%esp\n//;
706 $p =~ s/^\tmovl\s+\$\d+,\s*\%eax\n\tcall\s+__alloca\n// if ($TargetPlatform =~ /^.*-cygwin32/);
708 # GCC 3.1 is in the habit of adding spurious writes to the
709 # stack in the prologue. Just to be on the safe side,
710 # chuck these over the fence into the main code.
711 while ($p =~ /^\tmovl\s+\$\d+,\s*\d*\(\%esp\)\n/) {
712 # print "Spurious instruction: $&";
717 } elsif ($TargetPlatform =~ /^x86_64-/) {
718 $p =~ s/^\tpushq\s+\%r(bx|bp|12|13|14)\n//g;
719 $p =~ s/^\tmovq\s+\%r(bx|bp|12|13|14),\s*\d*\(\%rsp\)\n//g;
720 $p =~ s/^\tsubq\s+\$\d+,\s*\%rsp\n//;
722 } elsif ($TargetPlatform =~ /^ia64-/) {
723 $p =~ s/^\t\.prologue .*\n//;
724 $p =~ s/^\t\.save ar\.pfs, r\d+\n\talloc r\d+ = ar\.pfs, 0, 3[12], \d+, 0\n//;
725 $p =~ s/^\t\.fframe \d+\n\tadds r12 = -\d+, r12\n//;
726 $p =~ s/^\t\.save rp, r\d+\n\tmov r\d+ = b0\n//;
727 $p =~ s/^\t\.(mii|mmi)\n//g; # bundling is no longer sensible
728 $p =~ s/^\t;;\n//g; # discard stops
729 $p =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
731 # GCC 3.3 saves r1 in the prologue, move this to the body
732 if ($p =~ /^\tmov r\d+ = r1\n/) {
736 } elsif ($TargetPlatform =~ /^m68k-/) {
737 $p =~ s/^\tlink a6,#-?\d.*\n//;
738 $p =~ s/^\tpea a6@\n\tmovel sp,a6\n//;
739 # The above showed up in the asm code,
740 # so I added it here.
741 # I hope it's correct.
743 $p =~ s/^\tmovel d2,sp\@-\n//;
744 $p =~ s/^\tmovel d5,sp\@-\n//; # SMmark.* only?
745 $p =~ s/^\tmoveml \#0x[0-9a-f]+,sp\@-\n//; # SMmark.* only?
746 } elsif ($TargetPlatform =~ /^mips-/) {
747 # the .frame/.mask/.fmask that we use is the same
748 # as that produced by GCC for miniInterpret; this
749 # gives GDB some chance of figuring out what happened
750 $FRAME = "\t.frame\t\$sp,2168,\$31\n\t.mask\t0x90000000,-4\n\t.fmask\t0x00000000,0\n";
751 $p =~ s/^\t\.(frame).*\n/__FRAME__/g;
752 $p =~ s/^\t\.(mask|fmask).*\n//g;
753 $p =~ s/^\t\.cprestore.*\n/\t\.cprestore 416\n/; # 16 + 100 4-byte args
754 $p =~ s/^\tsubu\t\$sp,\$sp,\d+\n//;
755 $p =~ s/^\tsw\t\$31,\d+\(\$sp\)\n//;
756 $p =~ s/^\tsw\t\$fp,\d+\(\$sp\)\n//;
757 $p =~ s/^\tsw\t\$28,\d+\(\$sp\)\n//;
758 $p =~ s/__FRAME__/$FRAME/;
759 } elsif ($TargetPlatform =~ /^powerpc-apple-.*/) {
761 $pcrel_label =~ s/(.|\n)*^(L\d+\$pb):\n(.|\n)*/$2/ or $pcrel_label = "";
763 $p =~ s/^\tmflr r0\n//;
764 $p =~ s/^\tbl saveFP # f\d+\n//;
765 $p =~ s/^\tbl saveFP ; save f\d+-f\d+\n//;
766 $p =~ s/^L\d+\$pb:\n//;
767 $p =~ s/^\tstmw r\d+,-\d+\(r1\)\n//;
768 $p =~ s/^\tstfd f\d+,-\d+\(r1\)\n//g;
769 $p =~ s/^\tstw r0,\d+\(r1\)\n//g;
770 $p =~ s/^\tstwu r1,-\d+\(r1\)\n//;
771 $p =~ s/^\tstw r\d+,-\d+\(r1\)\n//g;
772 $p =~ s/^\tbcl 20,31,L\d+\$pb\n//;
773 $p =~ s/^L\d+\$pb:\n//;
774 $p =~ s/^\tmflr r31\n//;
776 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
777 # under some circumstances, only when generating position dependent code.
778 # I have no idea why, and I don't think it is necessary, so let's toss it.
779 $p =~ s/^\tli r\d+,0\n//g;
780 $p =~ s/^\tstw r\d+,\d+\(r1\)\n//g;
781 } elsif ($TargetPlatform =~ /^powerpc-.*-linux/) {
782 $p =~ s/^\tmflr 0\n//;
783 $p =~ s/^\tstmw \d+,\d+\(1\)\n//;
784 $p =~ s/^\tstfd \d+,\d+\(1\)\n//g;
785 $p =~ s/^\tstw r0,8\(1\)\n//;
786 $p =~ s/^\tstwu 1,-\d+\(1\)\n//;
787 $p =~ s/^\tstw \d+,\d+\(1\)\n//g;
789 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
790 # under some circumstances, only when generating position dependent code.
791 # I have no idea why, and I don't think it is necessary, so let's toss it.
792 $p =~ s/^\tli \d+,0\n//g;
793 $p =~ s/^\tstw \d+,\d+\(1\)\n//g;
795 print STDERR "$Pgm: unknown prologue mangling? $TargetPlatform\n";
798 # HWL HACK: dont die, just print a warning
799 #print stderr "HWL: this should die! Prologue junk?: $p\n" if $p =~ /^\t[^\.]/;
800 die "Prologue junk?: $p\n" if $p =~ /^\s+[^\s\.]/;
802 if ($TargetPlatform =~ /^powerpc-apple-.*/ && $pcrel_label ne "") {
803 # on PowerPC, we have to keep a part of the prologue
804 # (which loads the current instruction pointer into register r31)
805 $p .= "bcl 20,31,$pcrel_label\n";
806 $p .= "$pcrel_label:\n";
807 $p .= "\tmflr r31\n";
810 # glue together what's left
815 if ( $TargetPlatform =~ /^mips-/ ) {
816 # MIPS: first, this basic sequence may occur "--- END ---" or not
817 $c =~ s/^\tlw\t\$31,\d+\(\$sp\)\n\taddu\t\$sp,\$sp,\d+\n\tj\t\$31\n\t\.end/\t\.end/;
820 # toss all epilogue stuff; again, paranoidly
821 if ( $c =~ /--- END ---/ ) {
822 if (($r, $e) = split(/--- END ---/, $c)) {
823 if ($TargetPlatform =~ /^i386-/) {
825 $e =~ s/^\tpopl\s+\%edi\n//;
826 $e =~ s/^\tpopl\s+\%esi\n//;
827 $e =~ s/^\tpopl\s+\%edx\n//;
828 $e =~ s/^\tpopl\s+\%ecx\n//;
829 $e =~ s/^\taddl\s+\$\d+,\s*\%esp\n//;
830 $e =~ s/^\tsubl\s+\$-\d+,\s*\%esp\n//;
831 } elsif ($TargetPlatform =~ /^ia64-/) {
832 $e =~ s/^\tmov ar\.pfs = r\d+\n//;
833 $e =~ s/^\tmov b0 = r\d+\n//;
834 $e =~ s/^\t\.restore sp\n\tadds r12 = \d+, r12\n//;
835 $e =~ s/^\tbr\.ret\.sptk\.many b0\n//;
836 $e =~ s/^\t\.(mii|mmi|mib)\n//g; # bundling is no longer sensible
837 $e =~ s/^\t;;\n//g; # discard stops - stop at end of body is sufficient
838 $e =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
839 } elsif ($TargetPlatform =~ /^m68k-/) {
840 $e =~ s/^\tunlk a6\n//;
842 } elsif ($TargetPlatform =~ /^mips-/) {
843 $e =~ s/^\tlw\t\$31,\d+\(\$sp\)\n//;
844 $e =~ s/^\tlw\t\$fp,\d+\(\$sp\)\n//;
845 $e =~ s/^\taddu\t\$sp,\$sp,\d+\n//;
846 $e =~ s/^\tj\t\$31\n//;
847 } elsif ($TargetPlatform =~ /^powerpc-apple-.*/) {
848 $e =~ s/^\taddi r1,r1,\d+\n//;
849 $e =~ s/^\tcal r1,\d+\(r1\)\n//;
850 $e =~ s/^\tlw?z? r\d+,\d+\(r1\)\n//;
851 $e =~ s/^\tmtlr r0\n//;
853 $e =~ s/^\tb restFP ;.*\n//;
855 print STDERR "$Pgm: unknown epilogue mangling? $TargetPlatform\n";
858 print STDERR "WARNING: Epilogue junk?: $e\n" if $e =~ /^\t\s*[^\.\s\n]/;
860 # glue together what's left
862 $c =~ s/\n\t\n/\n/; # junk blank line
866 # On SPARCs, we don't do --- BEGIN/END ---, we just
867 # toss the register-windowing save/restore/ret* instructions
869 if ( $TargetPlatform =~ /^sparc-/ ) {
870 $c =~ s/^\t(save.*|restore.*|ret|retl)\n//g;
871 # throw away PROLOGUE comments
872 $c =~ s/^\t!#PROLOGUE# 0\n\t!#PROLOGUE# 1\n//;
875 # On Alphas, the prologue mangling is done a little later (below)
877 # toss all calls to __DISCARD__
878 $c =~ s/^\t(call|jbsr|jal)\s+${T_US}__DISCARD__\n//go;
879 $c =~ s/^\tjsr\s+\$26\s*,\s*${T_US}__DISCARD__\n//go if $TargetPlatform =~ /^alpha-/;
880 $c =~ s/^\tbl\s+L___DISCARD__\$stub\n//go if $TargetPlatform =~ /^powerpc-apple-.*/;
881 $c =~ s/^\tbl\s+__DISCARD__\n//go if $TargetPlatform =~ /^powerpc-.*-linux/;
883 # IA64: mangle tailcalls into jumps here
884 if ($TargetPlatform =~ /^ia64-/) {
885 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/) {
886 # Eek, the gcc optimiser is getting smarter... if we see a jump to the --- TAILCALL ---
887 # marker then we reapply the substitution at the source sites
888 $c =~ s/^\tbr \.L$2\n/\t--- TAILCALL ---\n/g if ($2);
892 # MIPS: that may leave some gratuitous asm macros around
893 # (no harm done; but we get rid of them to be tidier)
894 $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/
895 if $TargetPlatform =~ /^mips-/;
897 # toss stack adjustment after DoSparks
898 $c =~ s/^(\tjbsr _DoSparks\n)\taddqw #8,sp/$1/g
899 if $TargetPlatform =~ /^m68k-/; # this looks old...
901 if ( $TargetPlatform =~ /^alpha-/ &&
902 ! $magic_rdata_seen &&
903 $c =~ /^\s*\.rdata\n\t\.quad 0\n\t\.align \d\n/ ) {
904 $c =~ s/^\s*\.rdata\n\t\.quad 0\n\t\.align (\d)\n/\.rdata\n\t\.align $1\n/;
905 $magic_rdata_seen = 1;
908 # pick some end-things and move them to the next chunk
910 # pin a funny end-thing on (for easier matching):
911 $c .= 'FUNNY#END#THING';
913 while ( $c =~ /${T_MOVE_DIRVS}FUNNY#END#THING/o ) {
917 # on x86 we try not to copy any directives into a literal
918 # chunk, rather we keep looking for the next real chunk. This
919 # is because we get things like
921 # .globl blah_closure
927 if ( $TargetPlatform =~ /^(i386|sparc|powerpc)/ && $to_move =~ /${T_COPY_DIRVS}/ ) {
929 while ( $j < $numchks && $chk[$j] =~ /$T_CONST_LBL/) {
932 if ( $j < $numchks ) {
933 $chk[$j] = $to_move . $chk[$j];
937 elsif ( $i < ($numchks - 1)
938 && ( $to_move =~ /${T_COPY_DIRVS}/
939 || ($TargetPlatform =~ /^hppa/ && $to_move =~ /align/ && $chkcat[$i+1] eq 'literal') )) {
940 $chk[$i + 1] = $to_move . $chk[$i + 1];
941 # otherwise they're tossed
944 $c =~ s/${T_MOVE_DIRVS}FUNNY#END#THING/FUNNY#END#THING/o;
947 if ( $TargetPlatform =~ /^alpha-/ && $c =~ /^\t\.ent\s+(\S+)/ ) {
949 # toss all prologue stuff, except for loading gp, and the ..ng address
950 unless ($c =~ /\.ent.*\n\$.*\.\.ng:/) {
951 if (($p, $r) = split(/^\t\.prologue/, $c)) {
952 if (($keep, $junk) = split(/\.\.ng:/, $p)) {
953 $keep =~ s/^\t\.frame.*\n/\t.frame \$30,0,\$26,0\n/;
954 $keep =~ s/^\t\.(mask|fmask).*\n//g;
955 $c = $keep . "..ng:\n";
957 print STDERR "malformed code block ($ent)?\n"
960 $c .= "\t.prologue" . $r;
964 $c =~ s/FUNNY#END#THING//;
966 # print STDERR "\nCHK $i (AFTER) (",$chkcat[$i],"):\n", $c;
968 $chk[$i] = $c; # update w/ convenience copy
971 # open CHUNKS, ">/tmp/chunks2" or die "Cannot open /tmp/chunks2: $!\n";
972 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
975 if ( $TargetPlatform =~ /^alpha-/ ) {
976 # print out the header stuff first
977 $chk[0] =~ s/^(\t\.file.*)"(ghc\d+\.c)"/$1"$ifile_root.hc"/;
978 print OUTASM $chk[0];
980 } elsif ( $TargetPlatform =~ /^hppa/ ) {
981 print OUTASM $chk[0];
983 } elsif ( $TargetPlatform =~ /^mips-/ ) {
984 $chk[0] = "\t\.file\t1 \"$ifile_root.hc\"\n" . $chk[0];
986 # get rid of horrible "<dollar>Revision: .*$" strings
987 local(@lines0) = split(/\n/, $chk[0]);
989 while ( $z <= $#lines0 ) {
990 if ( $lines0[$z] =~ /^\t\.byte\t0x24,0x52,0x65,0x76,0x69,0x73,0x69,0x6f$/ ) {
993 while ( $z <= $#lines0 ) {
995 last if $lines0[$z] =~ /[,\t]0x0$/;
1001 $chk[0] = join("\n", @lines0);
1002 $chk[0] =~ s/\n\n+/\n/;
1003 print OUTASM $chk[0];
1006 # print out all the literal strings next
1007 for ($i = 0; $i < $numchks; $i++) {
1008 if ( $chkcat[$i] eq 'literal' ) {
1009 print OUTASM $T_HDR_literal, $chk[$i];
1010 print OUTASM "; end literal\n" if $TargetPlatform =~ /^hppa/; # for the splitter
1012 $chkcat[$i] = 'DONE ALREADY';
1016 # on the HPPA, print out all the bss next
1017 if ( $TargetPlatform =~ /^hppa/ ) {
1018 for ($i = 1; $i < $numchks; $i++) {
1019 if ( $chkcat[$i] eq 'bss' ) {
1020 print OUTASM "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$BSS\$\n\t.align 4\n";
1021 print OUTASM $chk[$i];
1023 $chkcat[$i] = 'DONE ALREADY';
1028 for ($i = $FIRST_MANGLABLE; $i < $numchks; $i++) {
1029 # print STDERR "$i: cat $chkcat[$i], symb $chksymb[$i]\n";
1031 next if $chkcat[$i] eq 'DONE ALREADY';
1033 if ( $chkcat[$i] eq 'misc' ) {
1034 if ($chk[$i] ne '') {
1035 print OUTASM $T_HDR_misc;
1036 &print_doctored($chk[$i], 0);
1039 } elsif ( $chkcat[$i] eq 'toss' ) {
1040 print STDERR "*** NB: TOSSING code for $chksymb[$i] !!! ***\n";
1042 } elsif ( $chkcat[$i] eq 'data' ) {
1043 if ($chk[$i] ne '') {
1044 print OUTASM $T_HDR_data;
1045 print OUTASM $chk[$i];
1048 } elsif ( $chkcat[$i] eq 'splitmarker' ) {
1049 # we can just re-constitute this one...
1050 # NB: we emit _three_ underscores no matter what,
1051 # so ghc-split doesn't have to care.
1052 print OUTASM "___stg_split_marker",$chksymb[$i],"${T_POST_LBL}\n";
1054 } elsif ( $chkcat[$i] eq 'closure'
1055 || $chkcat[$i] eq 'srt'
1056 || $chkcat[$i] eq 'infotbl'
1057 || $chkcat[$i] eq 'entry') { # do them in that order
1058 $symb = $chksymb[$i];
1061 if ( defined($closurechk{$symb}) ) {
1062 print OUTASM $T_HDR_closure;
1063 print OUTASM $chk[$closurechk{$symb}];
1064 $chkcat[$closurechk{$symb}] = 'DONE ALREADY';
1068 if ( defined($srtchk{$symb}) ) {
1069 print OUTASM $T_HDR_rodata;
1070 print OUTASM $chk[$srtchk{$symb}];
1071 $chkcat[$srtchk{$symb}] = 'DONE ALREADY';
1075 if ( defined($infochk{$symb}) ) {
1077 print OUTASM $T_HDR_info;
1078 print OUTASM &rev_tbl($symb, $chk[$infochk{$symb}], 1);
1080 # entry code will be put here!
1082 $chkcat[$infochk{$symb}] = 'DONE ALREADY';
1086 if ( defined($entrychk{$symb}) ) {
1088 $c = $chk[$entrychk{$symb}];
1090 # If this is an entry point with an info table,
1091 # eliminate the entry symbol and all directives involving it.
1092 if (defined($infochk{$symb}) && $TargetPlatform !~ /^ia64-/) {
1093 $c =~ s/^.*$symb_(entry|ret)${T_POST_LBL}\n//;
1094 $c =~ s/^\s*\..*$symb.*\n//g;
1097 print OUTASM $T_HDR_entry;
1099 &print_doctored($c, 1); # NB: the 1!!!
1101 $chkcat[$entrychk{$symb}] = 'DONE ALREADY';
1104 } elsif ( $chkcat[$i] eq 'vector' ) {
1105 $symb = $chksymb[$i];
1108 if ( defined($vectorchk{$symb}) ) {
1109 print OUTASM $T_HDR_vector;
1110 print OUTASM &rev_tbl($symb, $chk[$vectorchk{$symb}], 0);
1112 # direct return code will be put here!
1113 $chkcat[$vectorchk{$symb}] = 'DONE ALREADY';
1115 } elsif ( $TargetPlatform =~ /^alpha-/ ) {
1116 # Alphas: the commented nop is for the splitter, to ensure
1117 # that no module ends with a label as the very last
1118 # thing. (The linker will adjust the label to point
1119 # to the first code word of the next module linked in,
1120 # even if alignment constraints cause the label to move!)
1122 print OUTASM "\t# nop\n";
1125 } elsif ( $chkcat[$i] eq 'rodata' ) {
1126 print OUTASM $T_HDR_rodata;
1127 print OUTASM $chk[$i];
1128 $chkcat[$i] = 'DONE ALREADY';
1130 } elsif ( $chkcat[$i] eq 'toc' ) {
1131 # silly optimisation to print tocs, since they come in groups...
1132 print OUTASM $T_HDR_toc;
1134 while ($chkcat[$j] eq 'toc')
1135 { if ( $chk[$j] !~ /\.tc UpdatePAP\[TC\]/ # not needed: always turned into a jump.
1138 print OUTASM $chk[$j];
1140 $chkcat[$j] = 'DONE ALREADY';
1144 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && $chkcat[$i] eq 'dyld' ) {
1145 # powerpc-apple: dynamic linker stubs
1146 if($chk[$i] !~ /\.indirect_symbol ___DISCARD__/)
1147 { # print them out unchanged, but remove the stubs for __DISCARD__
1148 print OUTASM $chk[$i];
1151 &tidy_up_and_die(1,"$Pgm: unknown chkcat (ghc-asm: $TargetPlatform)\n$chkcat[$i]\n$chk[$i]\n");
1155 print OUTASM $EXTERN_DECLS if $TargetPlatform =~ /^mips-/;
1158 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1159 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1164 sub hppa_mash_prologue { # OK, epilogue, too
1167 # toss all prologue stuff
1168 s/^\s+\.ENTRY[^\0]*--- BEGIN ---/\t.ENTRY/;
1170 # Lie about our .CALLINFO
1171 s/^\s+\.CALLINFO.*$/\t.CALLINFO NO_CALLS,NO_UNWIND/;
1178 # toss all epilogue stuff
1179 s/^\s+--- END ---[^\0]*\.EXIT/\t.EXIT/;
1181 # Sorry; we moved the _info stuff to the code segment.
1182 s/_info,DATA/_info,CODE/g;
1189 sub print_doctored {
1190 local($_, $need_fallthru_patch) = @_;
1192 if ( $TargetPlatform !~ /^i386-/
1193 || ! /^\t[a-z]/ # no instructions in here, apparently
1194 || /^${T_US}__stginit_[A-Za-z0-9_]+${T_POST_LBL}/) {
1198 # OK, must do some x86 **HACKING**
1200 local($entry_patch) = '';
1201 local($exit_patch) = '';
1203 # gotta watch out for weird instructions that
1204 # invisibly smash various regs:
1205 # rep* %ecx used for counting
1206 # scas* %edi used for destination index
1207 # cmps* %e[sd]i used for indices
1208 # loop* %ecx used for counting
1213 # * use of STG reg [ nn(%ebx) ] where no machine reg avail
1215 # * GCC used an "STG reg" for its own purposes
1217 # * some secret uses of machine reg, requiring STG reg
1218 # to be saved/restored
1220 # The most dangerous "GCC uses" of an "STG reg" are when
1221 # the reg holds the target of a jmp -- it's tricky to
1222 # insert the patch-up code before we get to the target!
1223 # So here we change the jmps:
1225 # --------------------------------------------------------
1226 # it can happen that we have jumps of the form...
1227 # jmp *<something involving %esp>
1229 # jmp <something involving another naughty register...>
1231 # a reasonably-common case is:
1233 # movl $_blah,<bad-reg>
1237 s/^\tmovl\s+\$${T_US}(.*),\s*(\%e[abcd]x)\n\tjmp\s+\*\2/\tjmp $T_US$1/g;
1239 if ($StolenX86Regs <= 2 ) { # YURGH! spurious uses of esi?
1240 s/^\tmovl\s+(.*),\s*\%esi\n\tjmp\s+\*%esi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1241 s/^\tjmp\s+\*(.*\(.*\%esi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1242 s/^\tjmp\s+\*\%esi\n/\tmovl \%esi,\%eax\n\tjmp \*\%eax\n/g;
1243 die "$Pgm: (mangler) still have jump involving \%esi!\n$_"
1244 if /(jmp|call)\s+.*\%esi/;
1246 if ($StolenX86Regs <= 3 ) { # spurious uses of edi?
1247 s/^\tmovl\s+(.*),\s*\%edi\n\tjmp\s+\*%edi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1248 s/^\tjmp\s+\*(.*\(.*\%edi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1249 s/^\tjmp\s+\*\%edi\n/\tmovl \%edi,\%eax\n\tjmp \*\%eax\n/g;
1250 die "$Pgm: (mangler) still have jump involving \%edi!\n$_"
1251 if /(jmp|call)\s+.*\%edi/;
1254 # OK, now we can decide what our patch-up code is going to
1257 # Offsets into register table - you'd better update these magic
1258 # numbers should you change its contents!
1259 # local($OFFSET_R1)=0; No offset for R1 in new RTS.
1260 local($OFFSET_Hp)=88;
1262 # Note funky ".=" stuff; we're *adding* to these _patch guys
1263 if ( $StolenX86Regs <= 2
1264 && ( /[^0-9]\(\%ebx\)/ || /\%esi/ || /^\tcmps/ ) ) { # R1 (esi)
1265 $entry_patch .= "\tmovl \%esi,(\%ebx)\n";
1266 $exit_patch .= "\tmovl (\%ebx),\%esi\n";
1268 # nothing for call_{entry,exit} because %esi is callee-save
1270 if ( $StolenX86Regs <= 3
1271 && ( /${OFFSET_Hp}\(\%ebx\)/ || /\%edi/ || /^\t(scas|cmps)/ ) ) { # Hp (edi)
1272 $entry_patch .= "\tmovl \%edi,${OFFSET_Hp}(\%ebx)\n";
1273 $exit_patch .= "\tmovl ${OFFSET_Hp}(\%ebx),\%edi\n";
1275 # nothing for call_{entry,exit} because %edi is callee-save
1278 # --------------------------------------------------------
1279 # next, here we go with non-%esp patching!
1281 s/^(\t[a-z])/$entry_patch$1/; # before first instruction
1283 # Before calling GC we must set up the exit condition before the call
1284 # and entry condition when we come back
1286 # fix _all_ non-local jumps:
1288 s/^\tjmp\s+\*${T_X86_PRE_LLBL_PAT}/\tJMP___SL/go;
1289 s/^\tjmp\s+${T_X86_PRE_LLBL_PAT}/\tJMP___L/go;
1291 s/^(\tjmp\s+.*\n)/$exit_patch$1/g; # here's the fix...
1293 s/^\tJMP___SL/\tjmp \*${T_X86_PRE_LLBL}/go;
1294 s/^\tJMP___L/\tjmp ${T_X86_PRE_LLBL}/go;
1296 if ($StolenX86Regs == 2 ) {
1297 die "ARGH! Jump uses \%esi or \%edi with -monly-2-regs:\n$_"
1298 if /^\t(jmp|call)\s+.*\%e(si|di)/;
1299 } elsif ($StolenX86Regs == 3 ) {
1300 die "ARGH! Jump uses \%edi with -monly-3-regs:\n$_"
1301 if /^\t(jmp|call)\s+.*\%edi/;
1304 # --------------------------------------------------------
1305 # that's it -- print it
1307 #die "Funny jumps?\n$_" if /${T_X86_BADJMP}/o; # paranoia
1311 if ( $need_fallthru_patch ) { # exit patch for end of slow entry code
1312 print OUTASM $exit_patch;
1313 # ToDo: make it not print if there is a "jmp" at the end
1319 sub init_FUNNY_THINGS {
1320 %KNOWN_FUNNY_THING = (
1322 # "${T_US}stg_.*{T_POST_LBL}", 1,
1327 The following table reversal is used for both info tables and return
1328 vectors. In both cases, we remove the first entry from the table,
1329 reverse the table, put the label at the end, and paste some code
1330 (that which is normally referred to by the first entry in the table)
1331 right after the table itself. (The code pasting is done elsewhere.)
1335 local($symb, $tbl, $discard1) = @_;
1337 return ($tbl) if ($TargetPlatform =~ /^ia64-/);
1339 local($before) = '';
1341 local(@imports) = (); # hppa only
1344 local(@lines) = split(/\n/, $tbl);
1347 # Deal with the header...
1348 for ($i = 0; $i <= $#lines && $lines[$i] !~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1349 $label .= $lines[$i] . "\n",
1350 next if $lines[$i] =~ /^[A-Za-z0-9_]+_info${T_POST_LBL}$/o
1351 || $lines[$i] =~ /${T_DOT_GLOBAL}/o
1352 || $lines[$i] =~ /^${T_US}\S+_vtbl${T_POST_LBL}$/o;
1354 $before .= $lines[$i] . "\n"; # otherwise...
1357 # Grab the table data...
1358 if ( $TargetPlatform !~ /^hppa/ ) {
1359 for ( ; $i <= $#lines && $lines[$i] =~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1360 push(@words, $lines[$i]);
1362 } else { # hppa weirdness
1363 for ( ; $i <= $#lines && $lines[$i] =~ /^\s+(${T_DOT_WORD}|\.IMPORT)/; $i++) {
1364 if ($lines[$i] =~ /^\s+\.IMPORT/) {
1365 push(@imports, $lines[$i]);
1367 # We don't use HP's ``function pointers''
1368 # We just use labels in code space, like normal people
1369 $lines[$i] =~ s/P%//;
1370 push(@words, $lines[$i]);
1375 # Now throw away any initial zero word from the table. This is a hack
1376 # that lets us reduce the size of info tables when the SRT field is not
1377 # needed: see comments StgFunInfoTable in InfoTables.h.
1379 # The .zero business is for Linux/ELF.
1380 # The .skip business is for Sparc/Solaris/ELF.
1381 # The .blockz business is for HPPA.
1383 # if ($words[0] =~ /^\t?(${T_DOT_WORD}\s+0|\.zero\s+4|\.skip\s+4|\.blockz\s+4)/) {
1388 for (; $i <= $#lines; $i++) {
1389 $after .= $lines[$i] . "\n";
1392 # Alphas: If we have anonymous text (not part of a procedure), the
1393 # linker may complain about missing exception information. Bleh.
1394 # To suppress this, we place a .ent/.end pair around the code.
1395 # At the same time, we have to be careful and not enclose any leading
1396 # .file/.loc directives.
1397 if ( $TargetPlatform =~ /^alpha-/ && $label =~ /^([A-Za-z0-9_]+):$/) {
1398 local ($ident) = $1;
1399 $before =~ s/^((\s*\.(file|loc)\s+[^\n]*\n)*)/$1\t.ent $ident\n/;
1400 $after .= "\t.end $ident\n";
1403 # Alphas: The heroic Simon Marlow found a bug in the Digital UNIX
1404 # assembler (!) wherein .quad constants inside .text sections are
1405 # first narrowed to 32 bits then sign-extended back to 64 bits.
1406 # This obviously screws up our 64-bit bitmaps, so we work around
1407 # the bug by replacing .quad with .align 3 + .long + .long [ccshan]
1408 if ( $TargetPlatform =~ /^alpha-/ ) {
1410 if (/^\s*\.quad\s+([-+0-9].*\S)\s*$/ && length $1 >= 10) {
1411 local ($number) = $1;
1412 if ($number =~ /^([-+])?(0x?)?([0-9]+)$/) {
1413 local ($sign, $base, $digits) = ($1, $2, $3);
1414 $base = (10, 8, 16)[length $base];
1415 local ($hi, $lo) = (0, 0);
1416 foreach $i (split(//, $digits)) {
1417 $j = $lo * $base + $i;
1418 $lo = $j % 4294967296;
1419 $hi = $hi * $base + ($j - $lo) / 4294967296;
1421 ($hi, $lo) = (4294967295 - $hi, 4294967296 - $lo)
1423 $_ = "\t.align 3\n\t.long $lo\n\t.long $hi\n";
1424 # printf STDERR "TURNING %s into 0x %08x %08x\n", $number, $hi, $lo;
1426 print STDERR "Cannot handle \".quad $number\" in info table\n";
1434 . (($TargetPlatform !~ /^hppa/) ? '' : join("\n", @imports) . "\n")
1435 . join("\n", @words) . "\n"
1438 # print STDERR "before=$before\n";
1439 # print STDERR "label=$label\n";
1440 # print STDERR "words=",(reverse @words),"\n";
1441 # print STDERR "after=$after\n";
1447 The HP is a major nuisance. The threaded code mangler moved info
1448 tables from data space to code space, but unthreaded code in the RTS
1449 still has references to info tables in data space. Since the HP
1450 linker is very precise about where symbols live, we need to patch the
1451 references in the unthreaded RTS as well.
1454 sub mini_mangle_asm_hppa {
1455 local($in_asmf, $out_asmf) = @_;
1457 open(INASM, "< $in_asmf")
1458 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
1459 open(OUTASM,"> $out_asmf")
1460 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
1463 s/_info,DATA/_info,CODE/; # Move _info references to code space
1469 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1470 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1476 sub tidy_up_and_die {
1477 local($return_val, $msg) = @_;
1479 exit (($return_val == 0) ? 0 : 1);