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.*|\.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 ( $TargetPlatform =~ /^i386-.*-(solaris2|linux|gnu|freebsd|netbsd|openbsd|kfreebsdgnu)$/ ) {
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|gnu|freebsd|netbsd|openbsd)$/) ? '#' : '/' ;
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.*|\.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|type|size|local)';
224 $T_DOT_WORD = '\.(quad|long|value|byte|zero)';
225 $T_DOT_GLOBAL = '\.global';
227 $T_HDR_literal16 = "\.section\t\.rodata.cst16\n\t.align 16\n";
228 $T_HDR_literal = "\.section\t\.rodata\n";
230 $T_HDR_misc = "\.text\n\t\.align 8\n";
231 $T_HDR_data = "\.data\n\t\.align 8\n";
232 $T_HDR_rodata = "\.section\t\.rodata\n\t\.align 8\n";
234 # the assembler on x86_64/Linux refuses to generate code for
236 # where x is in the text section and y in the rodata section.
237 # It works if y is in the text section, though. This is probably
238 # going to cause difficulties for PIC, I imagine.
239 $T_HDR_relrodata= "\.text\n\t\.align 8\n";
241 $T_HDR_closure = "\.data\n\t\.align 8\n";
242 $T_HDR_info = "\.text\n\t\.align 8\n";
243 $T_HDR_entry = "\.text\n\t\.align 8\n";
244 $T_HDR_vector = "\.text\n\t\.align 8\n";
246 #--------------------------------------------------------#
247 } elsif ( $TargetPlatform =~ /^m68k-.*-sunos4/ ) {
249 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
250 $T_US = '_'; # _ if symbols have an underscore on the front
251 $T_PRE_APP = '^# MAY NOT APPLY'; # regexp that says what comes before APP/NO_APP
252 $T_CONST_LBL = '^LC(\d+):$';
255 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.proc\s+\d+|\.const|\.cstring|\.globl\s+\S+|\.text|\.data|\.even|\.stab[^n].*)\n)';
256 $T_COPY_DIRVS = '\.(globl|proc|stab)';
258 $T_DOT_WORD = '\.long';
259 $T_DOT_GLOBAL = '\.globl';
260 $T_HDR_literal = "\.text\n\t\.even\n";
261 $T_HDR_misc = "\.text\n\t\.even\n";
262 $T_HDR_data = "\.data\n\t\.even\n";
263 $T_HDR_rodata = "\.text\n\t\.even\n";
264 $T_HDR_closure = "\.data\n\t\.even\n";
265 $T_HDR_info = "\.text\n\t\.even\n";
266 $T_HDR_entry = "\.text\n\t\.even\n";
267 $T_HDR_vector = "\.text\n\t\.even\n";
269 #--------------------------------------------------------#
270 } elsif ( $TargetPlatform =~ /^mips-.*/ ) {
272 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
273 $T_US = ''; # _ if symbols have an underscore on the front
274 $T_PRE_APP = '^\s*#'; # regexp that says what comes before APP/NO_APP
275 $T_CONST_LBL = '^\$LC(\d+):$'; # regexp for what such a lbl looks like
278 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.(globl|ent)\s+\S+|\.text|\.r?data)\n)';
279 $T_COPY_DIRVS = '\.(globl|ent)';
281 $T_DOT_WORD = '\.word';
282 $T_DOT_GLOBAL = '^\t\.globl';
283 $T_HDR_literal = "\t\.rdata\n\t\.align 2\n";
284 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
285 $T_HDR_data = "\t\.data\n\t\.align 2\n";
286 $T_HDR_rodata = "\t\.rdata\n\t\.align 2\n";
287 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
288 $T_HDR_info = "\t\.text\n\t\.align 2\n";
289 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
290 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
292 #--------------------------------------------------------#
293 } elsif ( $TargetPlatform =~ /^powerpc-apple-darwin.*/ ) {
294 # Apple PowerPC Darwin/MacOS X.
295 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
296 $T_US = '_'; # _ if symbols have an underscore on the front
297 $T_PRE_APP = 'DOESNT APPLY'; # regexp that says what comes before APP/NO_APP
298 $T_CONST_LBL = '^\LC\d+:'; # regexp for what such a lbl looks like
301 $T_MOVE_DIRVS = '^(\s*(\.(p2)?align\s.*|\.text|\.data|\.const_data|\.cstring|\.non_lazy_symbol_pointer|\.const|\.static_const|\.literal4|\.literal8|\.static_data|\.globl \S+|\.section .*|\.lcomm.*)\n)';
302 $T_COPY_DIRVS = '\.(globl|lcomm)';
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\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_rodata = "\t\.const\n\t\.align 2\n";
311 $T_HDR_relrodata= "\t\.const_data\n\t\.align 2\n";
312 $T_HDR_closure = "\t\.data\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";
317 #--------------------------------------------------------#
318 } elsif ( $TargetPlatform =~ /^i386-apple-darwin.*/ ) {
319 # Apple PowerPC Darwin/MacOS X.
320 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
321 $T_US = '_'; # _ if symbols have an underscore on the front
322 $T_PRE_APP = 'DOESNT APPLY'; # regexp that says what comes before APP/NO_APP
323 $T_CONST_LBL = '^\LC\d+:'; # regexp for what such a lbl looks like
325 $T_X86_PRE_LLBL_PAT = 'L';
326 $T_X86_PRE_LLBL = 'L';
327 $T_X86_BADJMP = '^\tjmp [^L\*]';
329 $T_MOVE_DIRVS = '^(\s*(\.(p2)?align\s.*|\.text|\.data|\.const_data|\.cstring|\.non_lazy_symbol_pointer|\.const|\.static_const|\.literal4|\.literal8|\.static_data|\.globl \S+|\.section .*|\.lcomm.*)\n)';
330 $T_COPY_DIRVS = '\.(globl|lcomm)';
332 $T_DOT_WORD = '\.(long|short|byte|fill|space)';
333 $T_DOT_GLOBAL = '\.globl';
334 $T_HDR_toc = "\.toc\n";
335 $T_HDR_literal16= "\t\.literal8\n\t\.align 4\n";
336 $T_HDR_literal = "\t\.const\n\t\.align 4\n";
337 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
338 $T_HDR_data = "\t\.data\n\t\.align 2\n";
339 $T_HDR_rodata = "\t\.const\n\t\.align 2\n";
340 $T_HDR_relrodata= "\t\.const_data\n\t\.align 2\n";
341 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
342 $T_HDR_info = "\t\.text\n\t\.align 2\n";
343 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
344 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
346 #--------------------------------------------------------#
347 } elsif ( $TargetPlatform =~ /^x86_64-apple-darwin.*/ ) {
348 # Apple PowerPC Darwin/MacOS X.
349 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
350 $T_US = '_'; # _ if symbols have an underscore on the front
351 $T_PRE_APP = 'DOESNT APPLY'; # regexp that says what comes before APP/NO_APP
352 $T_CONST_LBL = '^\LC\d+:'; # regexp for what such a lbl looks like
355 $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)';
356 $T_COPY_DIRVS = '\.(globl|lcomm)';
358 $T_DOT_WORD = '\.(quad|long|short|byte|fill|space)';
359 $T_DOT_GLOBAL = '\.globl';
360 $T_HDR_toc = "\.toc\n";
361 $T_HDR_literal16= "\t\.literal8\n\t\.align 4\n";
362 $T_HDR_literal = "\t\.const\n\t\.align 4\n";
363 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
364 $T_HDR_data = "\t\.data\n\t\.align 2\n";
365 $T_HDR_rodata = "\t\.const\n\t\.align 2\n";
366 $T_HDR_relrodata= "\t\.const_data\n\t\.align 2\n";
367 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
368 $T_HDR_info = "\t\.text\n\t\.align 2\n";
369 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
370 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
372 #--------------------------------------------------------#
373 } elsif ( $TargetPlatform =~ /^powerpc-.*-linux/ ) {
375 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
376 $T_US = ''; # _ if symbols have an underscore on the front
377 $T_PRE_APP = '^#'; # regexp that says what comes before APP/NO_APP
378 $T_CONST_LBL = '^\.LC\d+:'; # regexp for what such a lbl looks like
381 $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)';
382 $T_COPY_DIRVS = '^\s*\.(globl|type|size|local)';
384 $T_DOT_WORD = '\.(long|short|byte|fill|space)';
385 $T_DOT_GLOBAL = '\.globl';
386 $T_HDR_toc = "\.toc\n";
387 $T_HDR_literal = "\t\.section\t.rodata\n\t\.align 2\n";
388 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
389 $T_HDR_data = "\t\.data\n\t\.align 2\n";
390 $T_HDR_rodata = "\t\.section\t.rodata\n\t\.align 2\n";
391 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
392 $T_HDR_info = "\t\.text\n\t\.align 2\n";
393 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
394 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
396 #--------------------------------------------------------#
397 } elsif ( $TargetPlatform =~ /^powerpc64-.*-linux/ ) {
399 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
400 $T_US = '\.'; # _ if symbols have an underscore on the front
401 $T_PRE_APP = '^#'; # regexp that says what comes before APP/NO_APP
402 $T_CONST_LBL = '^\.LC\d+:'; # regexp for what such a lbl looks like
405 $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)';
406 $T_COPY_DIRVS = '^\s*\.(globl|type|size|local)';
408 $T_DOT_WORD = '\.(long|short|byte|fill|space)';
409 $T_DOT_GLOBAL = '\.globl';
410 $T_HDR_toc = "\.toc\n";
411 $T_HDR_literal = "\t\.section\t\".toc\",\"aw\"\n";
412 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
413 $T_HDR_data = "\t\.data\n\t\.align 2\n";
414 $T_HDR_rodata = "\t\.section\t.rodata\n\t\.align 2\n";
415 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
416 $T_HDR_info = "\t\.text\n\t\.align 2\n";
417 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
418 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
420 #--------------------------------------------------------#
421 } elsif ( $TargetPlatform =~ /^sparc-.*-(solaris2|openbsd)/ ) {
423 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
424 $T_US = ''; # _ if symbols have an underscore on the front
425 $T_PRE_APP = 'DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
426 $T_CONST_LBL = '^\.LLC(\d+):$'; # regexp for what such a lbl looks like
429 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\s+\.local\s+\S+|\.text|\.data|\.stab.*|\s*\.section.*|\s+\.type.*|\s+\.size.*)\n)';
430 $T_COPY_DIRVS = '\.(global|local|proc|stab)';
432 $T_DOT_WORD = '\.(long|word|byte|half|skip|uahalf|uaword)';
433 $T_DOT_GLOBAL = '^\t\.global';
434 $T_HDR_literal = "\.text\n\t\.align 8\n";
435 $T_HDR_misc = "\.text\n\t\.align 4\n";
436 $T_HDR_data = "\.data\n\t\.align 8\n";
437 $T_HDR_rodata = "\.text\n\t\.align 4\n";
438 $T_HDR_closure = "\.data\n\t\.align 4\n";
439 $T_HDR_info = "\.text\n\t\.align 4\n";
440 $T_HDR_entry = "\.text\n\t\.align 4\n";
441 $T_HDR_vector = "\.text\n\t\.align 4\n";
443 #--------------------------------------------------------#
444 } elsif ( $TargetPlatform =~ /^sparc-.*-sunos4/ ) {
446 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
447 $T_US = '_'; # _ if symbols have an underscore on the front
448 $T_PRE_APP = '^# DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
449 $T_CONST_LBL = '^LC(\d+):$';
452 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.stab.*)\n)';
453 $T_COPY_DIRVS = '\.(global|proc|stab)';
455 $T_DOT_WORD = '\.word';
456 $T_DOT_GLOBAL = '^\t\.global';
457 $T_HDR_literal = "\.text\n\t\.align 8\n";
458 $T_HDR_misc = "\.text\n\t\.align 4\n";
459 $T_HDR_data = "\.data\n\t\.align 8\n";
460 $T_HDR_rodata = "\.text\n\t\.align 4\n";
461 $T_HDR_closure = "\.data\n\t\.align 4\n";
462 $T_HDR_info = "\.text\n\t\.align 4\n";
463 $T_HDR_entry = "\.text\n\t\.align 4\n";
464 $T_HDR_vector = "\.text\n\t\.align 4\n";
466 #--------------------------------------------------------#
467 } elsif ( $TargetPlatform =~ /^sparc-.*-linux/ ) {
468 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
469 $T_US = ''; # _ if symbols have an underscore on the front
470 $T_PRE_APP = '#'; # regexp that says what comes before APP/NO_APP
471 # Probably doesn't apply anyway
472 $T_CONST_LBL = '^\.LLC(\d+):$'; # regexp for what such a lbl looks like
475 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\s+\.local\s+\S+|\.text|\.data|\.seg|\.stab.*|\s+?\.section.*|\s+\.type.*|\s+\.size.*)\n)';
476 $T_COPY_DIRVS = '\.(global|local|globl|proc|stab)';
478 $T_DOT_WORD = '\.(long|word|nword|xword|byte|half|short|skip|uahalf|uaword)';
479 $T_DOT_GLOBAL = '^\t\.global';
480 $T_HDR_literal = "\.text\n\t\.align 8\n";
481 $T_HDR_misc = "\.text\n\t\.align 4\n";
482 $T_HDR_data = "\.data\n\t\.align 8\n";
483 $T_HDR_rodata = "\.text\n\t\.align 4\n";
484 $T_HDR_closure = "\.data\n\t\.align 4\n";
485 $T_HDR_info = "\.text\n\t\.align 4\n";
486 $T_HDR_entry = "\.text\n\t\.align 4\n";
487 $T_HDR_vector = "\.text\n\t\.align 4\n";
489 #--------------------------------------------------------#
491 print STDERR "$Pgm: don't know how to mangle assembly language for: $TargetPlatform\n";
495 if($T_HDR_relrodata eq "") {
497 # relrodata defaults to rodata.
498 $T_HDR_relrodata = $T_HDR_rodata;
502 print STDERR "T_STABBY: $T_STABBY\n";
503 print STDERR "T_US: $T_US\n";
504 print STDERR "T_PRE_APP: $T_PRE_APP\n";
505 print STDERR "T_CONST_LBL: $T_CONST_LBL\n";
506 print STDERR "T_POST_LBL: $T_POST_LBL\n";
507 if ( $TargetPlatform =~ /^i386-/ ) {
508 print STDERR "T_X86_PRE_LLBL_PAT: $T_X86_PRE_LLBL_PAT\n";
509 print STDERR "T_X86_PRE_LLBL: $T_X86_PRE_LLBL\n";
510 print STDERR "T_X86_BADJMP: $T_X86_BADJMP\n";
512 print STDERR "T_MOVE_DIRVS: $T_MOVE_DIRVS\n";
513 print STDERR "T_COPY_DIRVS: $T_COPY_DIRVS\n";
514 print STDERR "T_DOT_WORD: $T_DOT_WORD\n";
515 print STDERR "T_HDR_literal: $T_HDR_literal\n";
516 print STDERR "T_HDR_misc: $T_HDR_misc\n";
517 print STDERR "T_HDR_data: $T_HDR_data\n";
518 print STDERR "T_HDR_rodata: $T_HDR_rodata\n";
519 print STDERR "T_HDR_closure: $T_HDR_closure\n";
520 print STDERR "T_HDR_info: $T_HDR_info\n";
521 print STDERR "T_HDR_entry: $T_HDR_entry\n";
522 print STDERR "T_HDR_vector: $T_HDR_vector\n";
528 %************************************************************************
530 \subsection{Mangle away}
532 %************************************************************************
536 local($in_asmf, $out_asmf) = @_;
538 # multi-line regexp matching:
543 &init_TARGET_STUFF();
544 &init_FUNNY_THINGS();
546 open(INASM, "< $in_asmf")
547 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
548 open(OUTASM,"> $out_asmf")
549 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
551 # read whole file, divide into "chunks":
552 # record some info about what we've found...
554 @chk = (); # contents of the chunk
555 $numchks = 0; # number of them
556 @chkcat = (); # what category of thing in each chunk
557 @chksymb = (); # what symbol(base) is defined in this chunk
558 %entrychk = (); # ditto, its entry code
559 %closurechk = (); # ditto, the (static) closure
560 %srtchk = (); # ditto, its SRT (for top-level things)
561 %infochk = (); # given a symbol base, say what chunk its info tbl is in
562 %vectorchk = (); # ditto, return vector table
563 $EXTERN_DECLS = ''; # .globl <foo> .text (MIPS only)
565 $i = 0; $chkcat[0] = 'misc'; $chk[0] = '';
568 tr/\r//d if $TargetPlatform =~ /-mingw32$/; # In case Perl doesn't convert line endings
569 next if $T_STABBY && /^\.stab.*${T_US}__stg_split_marker/o;
570 next if $T_STABBY && /^\.stab.*ghc.*c_ID/;
571 next if /^\t\.def.*endef$/;
572 next if /${T_PRE_APP}(NO_)?APP/o;
573 next if /^;/ && $TargetPlatform =~ /^hppa/;
575 next if /(^$|^\t\.file\t|^ # )/ && $TargetPlatform =~ /^(mips|ia64)-/;
577 if ( $TargetPlatform =~ /^mips-/
578 && /^\t\.(globl\S+\.text|comm\t)/ ) {
579 $EXTERN_DECLS .= $_ unless /(__DISCARD__|\b(PK_|ASSIGN_)(FLT|DBL)\b)/;
580 # Treat .comm variables as data. These show up in two (known) places:
582 # - the module_registered variable used in the __stginit fragment.
583 # even though these are declared static and initialised, gcc 3.3
584 # likes to make them .comm, presumably to save space in the
587 # - global variables used to pass arguments from C to STG in
588 # a foreign export. (is this still true? --SDM)
590 } elsif ( /^\t\.comm.*$/ ) {
592 $chkcat[$i] = 'data';
595 # Labels ending "_str": these are literal strings.
596 } elsif ( /^${T_US}([A-Za-z0-9_]+)_str${T_POST_LBL}$/ ) {
598 $chkcat[$i] = 'rodata';
600 } elsif ( $TargetPlatform =~ /-darwin/
601 && (/^\s*\.subsections_via_symbols/
602 ||/^\s*\.no_dead_strip.*/)) {
603 # Don't allow Apple's linker to do any dead-stripping of symbols
604 # in this file, because it will mess up info-tables in mangled
606 # The .no_dead_strip directives are actually put there by
607 # the gcc3 "used" attribute on entry points.
609 } elsif ( $TargetPlatform =~ /^.*-apple-darwin.*/ && (
610 /^\s*\.picsymbol_stub/
611 || /^\s*\.section __TEXT,__picsymbol_stub\d,.*/
612 || /^\s*\.section __TEXT,__picsymbolstub\d,.*/
613 || /^\s*\.symbol_stub/
614 || /^\s*\.section __TEXT,__symbol_stub\d,.*/
615 || /^\s*\.section __TEXT,__symbolstub\d,.*/
616 || /^\s*\.lazy_symbol_pointer/
617 || /^\s*\.non_lazy_symbol_pointer/
618 || /^\s*\.section __IMPORT.*/))
621 $chkcat[$i] = 'dyld';
625 } elsif ( $TargetPlatform =~ /^.*-apple-darwin.*/ && $chkcat[$i] eq 'dyld' && /^\s*\.data/)
626 { # non_lazy_symbol_ptrs that point to local symbols
628 $chkcat[$i] = 'dyld';
631 } elsif ( $TargetPlatform =~ /^.*-apple-darwin.*/ && $chkcat[$i] eq 'dyld' && /^\s*\.align/)
632 { # non_lazy_symbol_ptrs that point to local symbols
634 } elsif ( $TargetPlatform =~ /^.*-apple-darwin.*/ && $chkcat[$i] eq 'dyld' && /^L_.*:$/)
635 { # non_lazy_symbol_ptrs that point to local symbols
636 $chk[++$i] = $dyld_section . $_;
637 $chkcat[$i] = 'dyld';
640 } elsif ( /^\s+/ ) { # most common case first -- a simple line!
641 # duplicated from the bottom
645 } elsif ( /\.\.ng:$/ && $TargetPlatform =~ /^alpha-/ ) {
646 # Alphas: Local labels not to be confused with new chunks
648 # NB: all the rest start with a non-space
650 } elsif ( $TargetPlatform =~ /^mips-/
651 && /^\d+:/ ) { # a funny-looking very-local label
654 } elsif ( /$T_CONST_LBL/o ) {
656 $chkcat[$i] = 'literal';
659 } elsif ( /^${T_US}__stg_split_marker(\d*)${T_POST_LBL}$/o ) {
661 $chkcat[$i] = 'splitmarker';
664 } elsif ( /^${T_US}([A-Za-z0-9_]+)_info${T_POST_LBL}$/o ) {
667 $chkcat[$i] = 'infotbl';
668 $chksymb[$i] = $symb;
670 die "Info table already? $symb; $i\n" if defined($infochk{$symb});
672 $infochk{$symb} = $i;
674 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(entry|ret)${T_POST_LBL}$/o ) {
676 $chkcat[$i] = 'entry';
681 } elsif ( /^${T_US}([A-Za-z0-9_]+)_closure${T_POST_LBL}$/o ) {
683 $chkcat[$i] = 'closure';
686 $closurechk{$1} = $i;
688 } elsif ( /^${T_US}([A-Za-z0-9_]+)_srt${T_POST_LBL}$/o ) {
695 } elsif ( /^${T_US}([A-Za-z0-9_]+)_ct${T_POST_LBL}$/o ) {
697 $chkcat[$i] = 'data';
700 } elsif ( /^${T_US}(stg_ap_stack_entries|stg_stack_save_entries|stg_arg_bitmaps)${T_POST_LBL}$/o ) {
702 $chkcat[$i] = 'data';
705 } elsif ( /^(${T_US}__gnu_compiled_c|gcc2_compiled\.)${T_POST_LBL}/o ) {
708 } elsif ( /^${T_US}[A-Za-z0-9_]+\.\d+${T_POST_LBL}$/o
709 || /^${T_US}.*_CAT${T_POST_LBL}$/o # PROF: _entryname_CAT
710 || /^${T_US}.*_done${T_POST_LBL}$/o # PROF: _module_done
711 || /^${T_US}_module_registered${T_POST_LBL}$/o # PROF: _module_registered
714 $chkcat[$i] = 'data';
717 } elsif ( /^([A-Za-z0-9_]+)\s+\.comm/ && $TargetPlatform =~ /^hppa/ ) {
722 } elsif ( /^${T_US}([A-Za-z0-9_]+)_cc(s)?${T_POST_LBL}$/o ) {
723 # all CC_ symbols go in the data section...
725 $chkcat[$i] = 'data';
728 } elsif ( /^${T_US}([A-Za-z0-9_]+)_hpc${T_POST_LBL}$/o ) {
729 # hpc shares tick boxes across modules
731 $chkcat[$i] = 'data';
734 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(alt|dflt)${T_POST_LBL}$/o ) {
736 $chkcat[$i] = 'misc';
738 } elsif ( /^${T_US}([A-Za-z0-9_]+)_vtbl${T_POST_LBL}$/o ) {
740 $chkcat[$i] = 'vector';
745 } elsif ( $TargetPlatform =~ /^i386-.*-solaris2/
746 && /^[A-Za-z0-9][A-Za-z0-9_]*:/ ) {
747 # Some Solaris system headers contain function definitions (as
748 # opposed to mere prototypes), which end up in the .hc file when
749 # a Haskell module foreign imports the corresponding system
750 # functions (most notably stat()). We put them into the text
751 # segment. Note that this currently does not extend to function
752 # names starting with an underscore.
755 $chkcat[$i] = 'misc';
758 } elsif ( $TargetPlatform =~ /^i386-apple-darwin/ && /^(___i686\.get_pc_thunk\.[abcd]x):/o) {
759 # To handle PIC on Darwin/x86, we need to appropriately pass through
760 # the get_pc_thunk functions. The need to be put into a special section
761 # marked as coalesced (otherwise the .weak_definition doesn't work
764 $chkcat[$i] = 'get_pc_thunk';
767 } elsif ( /^${T_US}[A-Za-z0-9_]/o
768 && ( $TargetPlatform !~ /^hppa/ # need to avoid local labels in this case
770 && ( $TargetPlatform !~ /^powerpc64/ # we need to avoid local labels in this case
771 || ! /^\.L\d+:$/ ) ) {
778 /^${T_US}stg_.*${T_POST_LBL}$/o # RTS internals
779 || /^${T_US}__stg_.*${T_POST_LBL}$/o # more RTS internals
780 || /^${T_US}__fexp_.*${T_POST_LBL}$/o # foreign export
781 || /^${T_US}.*_slow${T_POST_LBL}$/o # slow entry
782 || /^${T_US}__stginit.*${T_POST_LBL}$/o # __stginit<module>
783 || /^${T_US}.*_btm${T_POST_LBL}$/o # large bitmaps
784 || /^${T_US}.*_fast${T_POST_LBL}$/o # primops
785 || /^_uname:/o # x86/Solaris2
788 $chkcat[$i] = 'misc';
790 /^${T_US}.*_srtd${T_POST_LBL}$/o # large bitmaps
791 || /^${T_US}.*_closure_tbl${T_POST_LBL}$/o # closure tables
794 $chkcat[$i] = 'relrodata';
797 print STDERR "Warning: retaining unknown function \`$thing' in output from C compiler\n";
798 $chkcat[$i] = 'unknown';
801 } elsif ( $TargetPlatform =~ /^powerpc-.*-linux/ && /^\.LCTOC1 = /o ) {
802 # PowerPC Linux's large-model PIC (-fPIC) generates a gobal offset
803 # table "by hand". Be sure to copy it over.
804 # Note that this label and all entries in the table should actually
805 # go into the .got2 section, but it isn't easy to distinguish them
806 # from other constant literals (.LC\d+), so we just put everything
809 $chkcat[$i] = 'literal';
810 $chksymb[$i] = 'LCTOC1';
811 } else { # simple line (duplicated at the top)
816 $numchks = $#chk + 1;
818 # open CHUNKS, ">/tmp/chunks1" or die "Cannot open /tmp/chunks1: $!\n";
819 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
822 # the division into chunks is imperfect;
823 # we throw some things over the fence into the next
826 # also, there are things we would like to know
827 # about the whole module before we start spitting
830 local($FIRST_MANGLABLE) = ($TargetPlatform =~ /^(alpha-|hppa|mips-)/) ? 1 : 0;
831 local($FIRST_TOSSABLE ) = ($TargetPlatform =~ /^(hppa|mips-)/) ? 1 : 0;
833 # print STDERR "first chunk to mangle: $FIRST_MANGLABLE\n";
835 # Alphas: NB: we start meddling at chunk 1, not chunk 0
836 # The first ".rdata" is quite magical; as of GCC 2.7.x, it
837 # spits a ".quad 0" in after the very first ".rdata"; we
838 # detect this special case (tossing the ".quad 0")!
839 local($magic_rdata_seen) = 0;
841 # HPPAs, MIPSen: also start medding at chunk 1
843 for ($i = $FIRST_TOSSABLE; $i < $numchks; $i++) {
844 $c = $chk[$i]; # convenience copy
846 # print STDERR "\nCHK $i (BEFORE) (",$chkcat[$i],"):\n", $c;
848 # toss all prologue stuff; HPPA is pretty weird
850 $c = &hppa_mash_prologue($c) if $TargetPlatform =~ /^hppa-/;
852 # be slightly paranoid to make sure there's
853 # nothing surprising in there
854 if ( $c =~ /--- BEGIN ---/ ) {
855 if (($p, $r) = split(/--- BEGIN ---/, $c)) {
857 # remove junk whitespace around the split point
861 if ($TargetPlatform =~ /^i386-/) {
862 if ($p =~ /^\tsubl\s+\$(\d+),\s*\%esp\n/) {
864 die "Error: reserved stack space exceeded!\n Possible workarounds: compile with -fasm, or try another version of gcc.\n"
868 # gcc 3.4.3 puts this kind of stuff in the prologue, eg.
869 # when compiling PrimOps.cmm with -optc-O2:
872 # movl %ecx, 16(%esp)
873 # movl %edx, 20(%esp)
874 # but then the code of the function doesn't assume
875 # anything about the contnets of these stack locations.
876 # I think it's to do with the use of inline functions for
877 # PK_Word64() and friends, where gcc is initialising the
878 # contents of the struct to zero, and failing to optimise
879 # away the initialisation. Let's live dangerously and
880 # discard these initalisations.
882 $p =~ s/^\tpushl\s+\%e(di|si|bx)\n//g;
883 $p =~ s/^\txorl\s+\%e(ax|cx|dx),\s*\%e(ax|cx|dx)\n//g;
884 $p =~ s/^\tmovl\s+\%e(ax|cx|dx|si|di),\s*\d*\(\%esp\)\n//g;
885 $p =~ s/^\tmovl\s+\$\d+,\s*\d*\(\%esp\)\n//g;
886 $p =~ s/^\tsubl\s+\$\d+,\s*\%esp\n//;
887 $p =~ s/^\tmovl\s+\$\d+,\s*\%eax\n\tcall\s+__alloca\n// if ($TargetPlatform =~ /^.*-(cygwin32|mingw32)/);
889 if ($TargetPlatform =~ /^i386-apple-darwin/) {
891 $pcrel_label =~ s/(.|\n)*^(\"?L\d+\$pb\"?):\n(.|\n)*/$2/ or $pcrel_label = "";
893 $pcrel_reg =~ s/(.|\n)*.*___i686\.get_pc_thunk\.([abcd]x)\n(.|\n)*/$2/ or $pcrel_reg = "";
894 $p =~ s/^\s+call\s+___i686\.get_pc_thunk\..x//;
895 $p =~ s/^\"?L\d+\$pb\"?:\n//;
897 if ($pcrel_reg eq "bx") {
898 # Bad gcc. Goes and uses %ebx, our BaseReg, for PIC. Bad gcc.
899 die "Darwin/x86: -fPIC -via-C doesn't work yet, use -fasm. Aborting."
903 } elsif ($TargetPlatform =~ /^x86_64-/) {
904 $p =~ s/^\tpushq\s+\%r(bx|bp|12|13|14)\n//g;
905 $p =~ s/^\tmovq\s+\%r(bx|bp|12|13|14),\s*\d*\(\%rsp\)\n//g;
906 $p =~ s/^\tsubq\s+\$\d+,\s*\%rsp\n//;
908 } elsif ($TargetPlatform =~ /^ia64-/) {
909 $p =~ s/^\t\.prologue .*\n//;
910 $p =~ s/^\t\.save ar\.pfs, r\d+\n\talloc r\d+ = ar\.pfs, 0, 3[12], \d+, 0\n//;
911 $p =~ s/^\t\.fframe \d+\n\tadds r12 = -\d+, r12\n//;
912 $p =~ s/^\t\.save rp, r\d+\n\tmov r\d+ = b0\n//;
913 $p =~ s/^\t\.(mii|mmi)\n//g; # bundling is no longer sensible
914 $p =~ s/^\t;;\n//g; # discard stops
915 $p =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
917 # GCC 3.3 saves r1 in the prologue, move this to the body
918 if ($p =~ /^\tmov r\d+ = r1\n/) {
922 } elsif ($TargetPlatform =~ /^m68k-/) {
923 $p =~ s/^\tlink a6,#-?\d.*\n//;
924 $p =~ s/^\tpea a6@\n\tmovel sp,a6\n//;
925 # The above showed up in the asm code,
926 # so I added it here.
927 # I hope it's correct.
929 $p =~ s/^\tmovel d2,sp\@-\n//;
930 $p =~ s/^\tmovel d5,sp\@-\n//; # SMmark.* only?
931 $p =~ s/^\tmoveml \#0x[0-9a-f]+,sp\@-\n//; # SMmark.* only?
932 } elsif ($TargetPlatform =~ /^mips-/) {
933 # the .frame/.mask/.fmask that we use is the same
934 # as that produced by GCC for miniInterpret; this
935 # gives GDB some chance of figuring out what happened
936 $FRAME = "\t.frame\t\$sp,2168,\$31\n\t.mask\t0x90000000,-4\n\t.fmask\t0x00000000,0\n";
937 $p =~ s/^\t\.(frame).*\n/__FRAME__/g;
938 $p =~ s/^\t\.(mask|fmask).*\n//g;
939 $p =~ s/^\t\.cprestore.*\n/\t\.cprestore 416\n/; # 16 + 100 4-byte args
940 $p =~ s/^\tsubu\t\$sp,\$sp,\d+\n//;
941 $p =~ s/^\tsw\t\$31,\d+\(\$sp\)\n//;
942 $p =~ s/^\tsw\t\$fp,\d+\(\$sp\)\n//;
943 $p =~ s/^\tsw\t\$28,\d+\(\$sp\)\n//;
944 $p =~ s/__FRAME__/$FRAME/;
945 } elsif ($TargetPlatform =~ /^powerpc-apple-darwin.*/) {
947 $pcrel_label =~ s/(.|\n)*^(\"?L\d+\$pb\"?):\n(.|\n)*/$2/ or $pcrel_label = "";
949 $p =~ s/^\tmflr r0\n//;
950 $p =~ s/^\tbl saveFP # f\d+\n//;
951 $p =~ s/^\tbl saveFP ; save f\d+-f\d+\n//;
952 $p =~ s/^\"?L\d+\$pb\"?:\n//;
953 $p =~ s/^\tstmw r\d+,-\d+\(r1\)\n//;
954 $p =~ s/^\tstfd f\d+,-\d+\(r1\)\n//g;
955 $p =~ s/^\tstw r0,\d+\(r1\)\n//g;
956 $p =~ s/^\tstwu r1,-\d+\(r1\)\n//;
957 $p =~ s/^\tstw r\d+,-\d+\(r1\)\n//g;
958 $p =~ s/^\tbcl 20,31,\"?L\d+\$pb\"?\n//;
959 $p =~ s/^\"?L\d+\$pb\"?:\n//;
960 $p =~ s/^\tmflr r31\n//;
962 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
963 # under some circumstances, only when generating position dependent code.
964 # I have no idea why, and I don't think it is necessary, so let's toss it.
965 $p =~ s/^\tli r\d+,0\n//g;
966 $p =~ s/^\tstw r\d+,\d+\(r1\)\n//g;
967 } elsif ($TargetPlatform =~ /^powerpc-.*-linux/) {
968 $p =~ s/^\tmflr 0\n//;
969 $p =~ s/^\tstmw \d+,\d+\(1\)\n//;
970 $p =~ s/^\tstfd \d+,\d+\(1\)\n//g;
971 $p =~ s/^\tstw r0,8\(1\)\n//;
972 $p =~ s/^\tstwu 1,-\d+\(1\)\n//;
973 $p =~ s/^\tstw \d+,\d+\(1\)\n//g;
975 # GCC's "large-model" PIC (-fPIC)
977 $pcrel_label =~ s/(.|\n)*^.LCF(\d+):\n(.|\n)*/$2/ or $pcrel_label = "";
979 $p =~ s/^\tbcl 20,31,.LCF\d+\n//;
980 $p =~ s/^.LCF\d+:\n//;
981 $p =~ s/^\tmflr 30\n//;
982 $p =~ s/^\tlwz 0,\.LCL\d+-\.LCF\d+\(30\)\n//;
983 $p =~ s/^\tadd 30,0,30\n//;
985 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
986 # under some circumstances, only when generating position dependent code.
987 # I have no idea why, and I don't think it is necessary, so let's toss it.
988 $p =~ s/^\tli \d+,0\n//g;
989 $p =~ s/^\tstw \d+,\d+\(1\)\n//g;
990 } elsif ($TargetPlatform =~ /^powerpc64-.*-linux/) {
991 $p =~ s/^\tmr 31,1\n//;
992 $p =~ s/^\tmflr 0\n//;
993 $p =~ s/^\tstmw \d+,\d+\(1\)\n//;
994 $p =~ s/^\tstfd \d+,-?\d+\(1\)\n//g;
995 $p =~ s/^\tstd r0,8\(1\)\n//;
996 $p =~ s/^\tstdu 1,-\d+\(1\)\n//;
997 $p =~ s/^\tstd \d+,-?\d+\(1\)\n//g;
999 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
1000 # under some circumstances, only when generating position dependent code.
1001 # I have no idea why, and I don't think it is necessary, so let's toss it.
1002 $p =~ s/^\tli \d+,0\n//g;
1003 $p =~ s/^\tstd \d+,\d+\(1\)\n//g;
1005 print STDERR "$Pgm: unknown prologue mangling? $TargetPlatform\n";
1008 # HWL HACK: dont die, just print a warning
1009 #print stderr "HWL: this should die! Prologue junk?: $p\n" if $p =~ /^\t[^\.]/;
1010 die "Prologue junk?: $p\n" if $p =~ /^\s+[^\s\.]/;
1012 # For PIC, we want to keep part of the prologue
1013 if ($TargetPlatform =~ /^powerpc-apple-darwin.*/ && $pcrel_label ne "") {
1014 # Darwin: load the current instruction pointer into register r31
1015 $p .= "bcl 20,31,$pcrel_label\n";
1016 $p .= "$pcrel_label:\n";
1017 $p .= "\tmflr r31\n";
1018 } elsif ($TargetPlatform =~ /^powerpc-.*-linux/ && $pcrel_label ne "") {
1019 # Linux: load the GOT pointer into register 30
1020 $p .= "\tbcl 20,31,.LCF$pcrel_label\n";
1021 $p .= ".LCF$pcrel_label:\n";
1022 $p .= "\tmflr 30\n";
1023 $p .= "\tlwz 0,.LCL$pcrel_label-.LCF$pcrel_label(30)\n";
1024 $p .= "\tadd 30,0,30\n";
1025 } elsif ($TargetPlatform =~ /^i386-apple-darwin.*/ && $pcrel_label ne "") {
1026 $p .= "\tcall ___i686.get_pc_thunk.$pcrel_reg\n";
1027 $p .= "$pcrel_label:\n";
1030 # glue together what's left
1035 if ( $TargetPlatform =~ /^mips-/ ) {
1036 # MIPS: first, this basic sequence may occur "--- END ---" or not
1037 $c =~ s/^\tlw\t\$31,\d+\(\$sp\)\n\taddu\t\$sp,\$sp,\d+\n\tj\t\$31\n\t\.end/\t\.end/;
1040 # toss all epilogue stuff; again, paranoidly
1041 if ( $c =~ /--- END ---/ ) {
1042 if (($r, $e) = split(/--- END ---/, $c)) {
1043 if ($TargetPlatform =~ /^i386-/) {
1045 $e =~ s/^\tpopl\s+\%edi\n//;
1046 $e =~ s/^\tpopl\s+\%esi\n//;
1047 $e =~ s/^\tpopl\s+\%edx\n//;
1048 $e =~ s/^\tpopl\s+\%ecx\n//;
1049 $e =~ s/^\taddl\s+\$\d+,\s*\%esp\n//;
1050 $e =~ s/^\tsubl\s+\$-\d+,\s*\%esp\n//;
1051 } elsif ($TargetPlatform =~ /^ia64-/) {
1052 $e =~ s/^\tmov ar\.pfs = r\d+\n//;
1053 $e =~ s/^\tmov b0 = r\d+\n//;
1054 $e =~ s/^\t\.restore sp\n\tadds r12 = \d+, r12\n//;
1055 $e =~ s/^\tbr\.ret\.sptk\.many b0\n//;
1056 $e =~ s/^\t\.(mii|mmi|mib)\n//g; # bundling is no longer sensible
1057 $e =~ s/^\t;;\n//g; # discard stops - stop at end of body is sufficient
1058 $e =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
1059 } elsif ($TargetPlatform =~ /^m68k-/) {
1060 $e =~ s/^\tunlk a6\n//;
1062 } elsif ($TargetPlatform =~ /^mips-/) {
1063 $e =~ s/^\tlw\t\$31,\d+\(\$sp\)\n//;
1064 $e =~ s/^\tlw\t\$fp,\d+\(\$sp\)\n//;
1065 $e =~ s/^\taddu\t\$sp,\$sp,\d+\n//;
1066 $e =~ s/^\tj\t\$31\n//;
1067 } elsif ($TargetPlatform =~ /^powerpc-apple-darwin.*/) {
1068 $e =~ s/^\taddi r1,r1,\d+\n//;
1069 $e =~ s/^\tlwz r\d+,\d+\(r1\)\n//;
1070 $e =~ s/^\tlmw r\d+,-\d+\(r1\)\n//;
1071 $e =~ s/^\tmtlr r0\n//;
1073 $e =~ s/^\tb restFP ;.*\n//;
1074 } elsif ($TargetPlatform =~ /^powerpc64-.*-linux/) {
1075 $e =~ s/^\tmr 3,0\n//;
1076 $e =~ s/^\taddi 1,1,\d+\n//;
1077 $e =~ s/^\tld 0,16\(1\)\n//;
1078 $e =~ s/^\tmtlr 0\n//;
1080 # callee-save registers
1081 $e =~ s/^\tld \d+,-?\d+\(1\)\n//g;
1082 $e =~ s/^\tlfd \d+,-?\d+\(1\)\n//g;
1084 # get rid of the debug junk along with the blr
1085 $e =~ s/^\tblr\n\t.long .*\n\t.byte .*\n//;
1087 # incase we missed it with the last one get the blr alone
1090 print STDERR "$Pgm: unknown epilogue mangling? $TargetPlatform\n";
1093 print STDERR "WARNING: Epilogue junk?: $e\n" if $e =~ /^\t\s*[^\.\s\n]/;
1095 # glue together what's left
1097 $c =~ s/\n\t\n/\n/; # junk blank line
1101 # On SPARCs, we don't do --- BEGIN/END ---, we just
1102 # toss the register-windowing save/restore/ret* instructions
1103 # directly unless they've been generated by function definitions in header
1105 if ( $TargetPlatform =~ /^sparc-/ ) {
1106 if ( ! ( $TargetPlatform =~ /solaris2$/ && $chkcat[$i] eq 'unknown' )) {
1107 $c =~ s/^\t(save.*|restore.*|ret|retl)\n//g;
1109 # throw away PROLOGUE comments
1110 $c =~ s/^\t!#PROLOGUE# 0\n\t!#PROLOGUE# 1\n//;
1113 # On Alphas, the prologue mangling is done a little later (below)
1115 # toss all calls to __DISCARD__
1116 $c =~ s/^\t(call|jbsr|jal)\s+${T_US}__DISCARD__\n//go;
1117 $c =~ s/^\tjsr\s+\$26\s*,\s*${T_US}__DISCARD__\n//go if $TargetPlatform =~ /^alpha-/;
1118 $c =~ s/^\tbl\s+L___DISCARD__\$stub\n//go if $TargetPlatform =~ /^powerpc-apple-darwin.*/;
1119 $c =~ s/^\tbl\s+__DISCARD__(\@plt)?\n//go if $TargetPlatform =~ /^powerpc-.*-linux/;
1120 $c =~ s/^\tbl\s+\.__DISCARD__\n\s+nop\n//go if $TargetPlatform =~ /^powerpc64-.*-linux/;
1121 $c =~ s/^\tcall\s+L___DISCARD__\$stub\n//go if $TargetPlatform =~ /i386-apple-darwin.*/;
1123 # IA64: mangle tailcalls into jumps here
1124 if ($TargetPlatform =~ /^ia64-/) {
1125 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/) {
1126 # Eek, the gcc optimiser is getting smarter... if we see a jump to the --- TAILCALL ---
1127 # marker then we reapply the substitution at the source sites
1128 $c =~ s/^\tbr \.L$2\n/\t--- TAILCALL ---\n/g if ($2);
1132 # MIPS: that may leave some gratuitous asm macros around
1133 # (no harm done; but we get rid of them to be tidier)
1134 $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/
1135 if $TargetPlatform =~ /^mips-/;
1137 # toss stack adjustment after DoSparks
1138 $c =~ s/^(\tjbsr _DoSparks\n)\taddqw #8,sp/$1/g
1139 if $TargetPlatform =~ /^m68k-/; # this looks old...
1141 if ( $TargetPlatform =~ /^alpha-/ &&
1142 ! $magic_rdata_seen &&
1143 $c =~ /^\s*\.rdata\n\t\.quad 0\n\t\.align \d\n/ ) {
1144 $c =~ s/^\s*\.rdata\n\t\.quad 0\n\t\.align (\d)\n/\.rdata\n\t\.align $1\n/;
1145 $magic_rdata_seen = 1;
1148 # pick some end-things and move them to the next chunk
1150 # pin a funny end-thing on (for easier matching):
1151 $c .= 'FUNNY#END#THING';
1153 while ( $c =~ /${T_MOVE_DIRVS}FUNNY#END#THING/o ) {
1157 # on x86 we try not to copy any directives into a literal
1158 # chunk, rather we keep looking for the next real chunk. This
1159 # is because we get things like
1161 # .globl blah_closure
1167 if ( $TargetPlatform =~ /^(i386|sparc|powerpc)/ && $to_move =~ /${T_COPY_DIRVS}/ ) {
1169 while ( $j < $numchks && $chk[$j] =~ /$T_CONST_LBL/) {
1172 if ( $j < $numchks ) {
1173 $chk[$j] = $to_move . $chk[$j];
1177 elsif ( $i < ($numchks - 1)
1178 && ( $to_move =~ /${T_COPY_DIRVS}/
1179 || ($TargetPlatform =~ /^hppa/ && $to_move =~ /align/ && $chkcat[$i+1] eq 'literal') )) {
1180 $chk[$i + 1] = $to_move . $chk[$i + 1];
1181 # otherwise they're tossed
1184 $c =~ s/${T_MOVE_DIRVS}FUNNY#END#THING/FUNNY#END#THING/o;
1187 if ( $TargetPlatform =~ /^alpha-/ && $c =~ /^\t\.ent\s+(\S+)/ ) {
1189 # toss all prologue stuff, except for loading gp, and the ..ng address
1190 unless ($c =~ /\.ent.*\n\$.*\.\.ng:/) {
1191 if (($p, $r) = split(/^\t\.prologue/, $c)) {
1192 if (($keep, $junk) = split(/\.\.ng:/, $p)) {
1193 $keep =~ s/^\t\.frame.*\n/\t.frame \$30,0,\$26,0\n/;
1194 $keep =~ s/^\t\.(mask|fmask).*\n//g;
1195 $c = $keep . "..ng:\n";
1197 print STDERR "malformed code block ($ent)?\n"
1200 $c .= "\t.prologue" . $r;
1204 $c =~ s/FUNNY#END#THING//;
1206 # print STDERR "\nCHK $i (AFTER) (",$chkcat[$i],"):\n", $c;
1208 $chk[$i] = $c; # update w/ convenience copy
1211 # open CHUNKS, ">/tmp/chunks2" or die "Cannot open /tmp/chunks2: $!\n";
1212 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
1215 if ( $TargetPlatform =~ /^alpha-/ ) {
1216 # print out the header stuff first
1217 $chk[0] =~ s/^(\t\.file.*)"(ghc\d+\.c)"/$1"$ifile_root.hc"/;
1218 print OUTASM $chk[0];
1220 } elsif ( $TargetPlatform =~ /^hppa/ ) {
1221 print OUTASM $chk[0];
1223 } elsif ( $TargetPlatform =~ /^mips-/ ) {
1224 $chk[0] = "\t\.file\t1 \"$ifile_root.hc\"\n" . $chk[0];
1226 # get rid of horrible "<dollar>Revision: .*$" strings
1227 local(@lines0) = split(/\n/, $chk[0]);
1229 while ( $z <= $#lines0 ) {
1230 if ( $lines0[$z] =~ /^\t\.byte\t0x24,0x52,0x65,0x76,0x69,0x73,0x69,0x6f$/ ) {
1233 while ( $z <= $#lines0 ) {
1235 last if $lines0[$z] =~ /[,\t]0x0$/;
1241 $chk[0] = join("\n", @lines0);
1242 $chk[0] =~ s/\n\n+/\n/;
1243 print OUTASM $chk[0];
1246 # print out all the literal strings next
1247 for ($i = 0; $i < $numchks; $i++) {
1248 if ( $chkcat[$i] eq 'literal' ) {
1250 # HACK: try to detect 16-byte constants and align them
1251 # on a 16-byte boundary. x86_64 sometimes needs 128-bit
1252 # aligned constants, and so does Darwin/x86.
1253 if ( $TargetPlatform =~ /^x86_64/
1254 || $TargetPlatform =~ /^i386-apple-darwin/ ) {
1256 if ($z =~ /(\.long.*\n.*\.long.*\n.*\.long.*\n.*\.long|\.quad.*\n.*\.quad)/) {
1257 print OUTASM $T_HDR_literal16;
1259 print OUTASM $T_HDR_literal;
1262 print OUTASM $T_HDR_literal;
1265 print OUTASM $chk[$i];
1266 print OUTASM "; end literal\n" if $TargetPlatform =~ /^hppa/; # for the splitter
1268 $chkcat[$i] = 'DONE ALREADY';
1272 # on the HPPA, print out all the bss next
1273 if ( $TargetPlatform =~ /^hppa/ ) {
1274 for ($i = 1; $i < $numchks; $i++) {
1275 if ( $chkcat[$i] eq 'bss' ) {
1276 print OUTASM "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$BSS\$\n\t.align 4\n";
1277 print OUTASM $chk[$i];
1279 $chkcat[$i] = 'DONE ALREADY';
1284 for ($i = $FIRST_MANGLABLE; $i < $numchks; $i++) {
1285 # print STDERR "$i: cat $chkcat[$i], symb $chksymb[$i]\n";
1287 next if $chkcat[$i] eq 'DONE ALREADY';
1289 if ( $chkcat[$i] eq 'misc' || $chkcat[$i] eq 'unknown' ) {
1290 if ($chk[$i] ne '') {
1291 print OUTASM $T_HDR_misc;
1292 &print_doctored($chk[$i], 0);
1295 } elsif ( $chkcat[$i] eq 'toss' ) {
1296 print STDERR "*** NB: TOSSING code for $chksymb[$i] !!! ***\n";
1298 } elsif ( $chkcat[$i] eq 'data' ) {
1299 if ($chk[$i] ne '') {
1300 print OUTASM $T_HDR_data;
1301 print OUTASM $chk[$i];
1304 } elsif ( $chkcat[$i] eq 'splitmarker' ) {
1305 # we can just re-constitute this one...
1306 # NB: we emit _three_ underscores no matter what,
1307 # so ghc-split doesn't have to care.
1308 print OUTASM "___stg_split_marker",$chksymb[$i],"${T_POST_LBL}\n";
1310 } elsif ( $chkcat[$i] eq 'closure'
1311 || $chkcat[$i] eq 'srt'
1312 || $chkcat[$i] eq 'infotbl'
1313 || $chkcat[$i] eq 'entry') { # do them in that order
1314 $symb = $chksymb[$i];
1317 if ( defined($closurechk{$symb}) ) {
1318 print OUTASM $T_HDR_closure;
1319 print OUTASM $chk[$closurechk{$symb}];
1320 $chkcat[$closurechk{$symb}] = 'DONE ALREADY';
1324 if ( defined($srtchk{$symb}) ) {
1325 print OUTASM $T_HDR_relrodata;
1326 print OUTASM $chk[$srtchk{$symb}];
1327 $chkcat[$srtchk{$symb}] = 'DONE ALREADY';
1331 if ( defined($infochk{$symb}) ) {
1333 print OUTASM $T_HDR_info;
1334 print OUTASM &rev_tbl($symb, $chk[$infochk{$symb}], 1);
1336 # entry code will be put here!
1338 $chkcat[$infochk{$symb}] = 'DONE ALREADY';
1342 if ( defined($entrychk{$symb}) ) {
1344 $c = $chk[$entrychk{$symb}];
1346 # If this is an entry point with an info table,
1347 # eliminate the entry symbol and all directives involving it.
1348 if (defined($infochk{$symb}) && $TargetPlatform !~ /^ia64-/) {
1350 foreach $l (split(/\n/,$c)) {
1351 next if $l =~ /^.*$symb_(entry|ret)${T_POST_LBL}/;
1353 # If we have .type/.size direrctives involving foo_entry,
1354 # then make them refer to foo_info instead. The information
1355 # in these directives is used by the cachegrind annotator,
1356 # so it is worthwhile keeping.
1357 if ($l =~ /^\s*\.(type|size).*$symb_(entry|ret)/) {
1358 $l =~ s/$symb(_entry|_ret)/${symb}_info/g;
1362 next if $l =~ /^\s*\..*$symb.*\n?/;
1365 $c = join("\n",@o) . "\n";
1368 print OUTASM $T_HDR_entry;
1370 &print_doctored($c, 1); # NB: the 1!!!
1372 $chkcat[$entrychk{$symb}] = 'DONE ALREADY';
1375 } elsif ( $chkcat[$i] eq 'vector' ) {
1376 $symb = $chksymb[$i];
1379 if ( defined($vectorchk{$symb}) ) {
1380 print OUTASM $T_HDR_vector;
1381 print OUTASM &rev_tbl($symb, $chk[$vectorchk{$symb}], 0);
1383 # direct return code will be put here!
1384 $chkcat[$vectorchk{$symb}] = 'DONE ALREADY';
1386 } elsif ( $TargetPlatform =~ /^alpha-/ ) {
1387 # Alphas: the commented nop is for the splitter, to ensure
1388 # that no module ends with a label as the very last
1389 # thing. (The linker will adjust the label to point
1390 # to the first code word of the next module linked in,
1391 # even if alignment constraints cause the label to move!)
1393 print OUTASM "\t# nop\n";
1396 } elsif ( $chkcat[$i] eq 'rodata' ) {
1397 print OUTASM $T_HDR_rodata;
1398 print OUTASM $chk[$i];
1399 $chkcat[$i] = 'DONE ALREADY';
1400 } elsif ( $chkcat[$i] eq 'relrodata' ) {
1401 print OUTASM $T_HDR_relrodata;
1402 print OUTASM $chk[$i];
1403 $chkcat[$i] = 'DONE ALREADY';
1404 } elsif ( $chkcat[$i] eq 'toc' ) {
1405 # silly optimisation to print tocs, since they come in groups...
1406 print OUTASM $T_HDR_toc;
1408 while ($chkcat[$j] eq 'toc')
1409 { if ( $chk[$j] !~ /\.tc UpdatePAP\[TC\]/ # not needed: always turned into a jump.
1412 print OUTASM $chk[$j];
1414 $chkcat[$j] = 'DONE ALREADY';
1418 } elsif ( $TargetPlatform =~ /^.*-apple-darwin.*/ && $chkcat[$i] eq 'dyld' ) {
1419 # apple-darwin: dynamic linker stubs
1420 if($chk[$i] !~ /\.indirect_symbol ___DISCARD__/)
1421 { # print them out unchanged, but remove the stubs for __DISCARD__
1422 print OUTASM $chk[$i];
1424 } elsif ( $TargetPlatform =~ /^i386-apple-darwin.*/ && $chkcat[$i] eq 'get_pc_thunk' ) {
1425 # i386-apple-darwin: __i686.get_pc_thunk.[abcd]x
1426 print OUTASM ".section __TEXT,__textcoal_nt,coalesced,no_toc\n";
1427 print OUTASM $chk[$i];
1429 &tidy_up_and_die(1,"$Pgm: unknown chkcat (ghc-asm: $TargetPlatform)\n$chkcat[$i]\n$chk[$i]\n");
1433 print OUTASM $EXTERN_DECLS if $TargetPlatform =~ /^mips-/;
1436 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1437 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1442 sub hppa_mash_prologue { # OK, epilogue, too
1445 # toss all prologue stuff
1446 s/^\s+\.ENTRY[^\0]*--- BEGIN ---/\t.ENTRY/;
1448 # Lie about our .CALLINFO
1449 s/^\s+\.CALLINFO.*$/\t.CALLINFO NO_CALLS,NO_UNWIND/;
1456 # toss all epilogue stuff
1457 s/^\s+--- END ---[^\0]*\.EXIT/\t.EXIT/;
1459 # Sorry; we moved the _info stuff to the code segment.
1460 s/_info,DATA/_info,CODE/g;
1467 sub print_doctored {
1468 local($_, $need_fallthru_patch) = @_;
1470 if ( $TargetPlatform =~ /^x86_64-/ ) {
1473 # movq -4(%ebp), %rax
1478 s/^\tmovq\s+(-?\d*\(\%r(bx|bp|13)\)),\s*(\%r(ax|cx|dx|10|11))\n\tjmp\s+\*\3/\tjmp\t\*$1/g;
1479 s/^\tmovl\s+\$${T_US}(.*),\s*(\%e(ax|cx|si|di))\n\tjmp\s+\*\%r\3/\tjmp\t$T_US$1/g;
1482 if ( $TargetPlatform !~ /^i386-/
1483 || ! /^\t[a-z]/ # no instructions in here, apparently
1484 || /^${T_US}__stginit_[A-Za-z0-9_]+${T_POST_LBL}/) {
1489 # OK, must do some x86 **HACKING**
1491 local($entry_patch) = '';
1492 local($exit_patch) = '';
1494 # gotta watch out for weird instructions that
1495 # invisibly smash various regs:
1496 # rep* %ecx used for counting
1497 # scas* %edi used for destination index
1498 # cmps* %e[sd]i used for indices
1499 # loop* %ecx used for counting
1504 # * use of STG reg [ nn(%ebx) ] where no machine reg avail
1506 # * GCC used an "STG reg" for its own purposes
1508 # * some secret uses of machine reg, requiring STG reg
1509 # to be saved/restored
1511 # The most dangerous "GCC uses" of an "STG reg" are when
1512 # the reg holds the target of a jmp -- it's tricky to
1513 # insert the patch-up code before we get to the target!
1514 # So here we change the jmps:
1516 # --------------------------------------------------------
1517 # it can happen that we have jumps of the form...
1518 # jmp *<something involving %esp>
1520 # jmp <something involving another naughty register...>
1522 # a reasonably-common case is:
1524 # movl $_blah,<bad-reg>
1527 s/^\tmovl\s+\$${T_US}(.*),\s*(\%e[acd]x)\n\tjmp\s+\*\2/\tjmp $T_US$1/g;
1531 # movl -4(%ebx), %eax
1536 s/^\tmovl\s+(-?\d*\(\%e(bx|si)\)),\s*(\%e[acd]x)\n\tjmp\s+\*\3/\tjmp\t\*$1/g;
1538 if ($StolenX86Regs <= 2 ) { # YURGH! spurious uses of esi?
1539 s/^\tmovl\s+(.*),\s*\%esi\n\tjmp\s+\*%esi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1540 s/^\tjmp\s+\*(.*\(.*\%esi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1541 s/^\tjmp\s+\*\%esi\n/\tmovl \%esi,\%eax\n\tjmp \*\%eax\n/g;
1542 die "$Pgm: (mangler) still have jump involving \%esi!\n$_"
1543 if /(jmp|call)\s+.*\%esi/;
1545 if ($StolenX86Regs <= 3 ) { # spurious uses of edi?
1546 s/^\tmovl\s+(.*),\s*\%edi\n\tjmp\s+\*%edi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1547 s/^\tjmp\s+\*(.*\(.*\%edi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1548 s/^\tjmp\s+\*\%edi\n/\tmovl \%edi,\%eax\n\tjmp \*\%eax\n/g;
1549 die "$Pgm: (mangler) still have jump involving \%edi!\n$_"
1550 if /(jmp|call)\s+.*\%edi/;
1553 # OK, now we can decide what our patch-up code is going to
1556 # Offsets into register table - you'd better update these magic
1557 # numbers should you change its contents!
1558 # local($OFFSET_R1)=0; No offset for R1 in new RTS.
1559 local($OFFSET_Hp)=88;
1561 # Note funky ".=" stuff; we're *adding* to these _patch guys
1562 if ( $StolenX86Regs <= 2
1563 && ( /[^0-9]\(\%ebx\)/ || /\%esi/ || /^\tcmps/ ) ) { # R1 (esi)
1564 $entry_patch .= "\tmovl \%esi,(\%ebx)\n";
1565 $exit_patch .= "\tmovl (\%ebx),\%esi\n";
1567 # nothing for call_{entry,exit} because %esi is callee-save
1569 if ( $StolenX86Regs <= 3
1570 && ( /${OFFSET_Hp}\(\%ebx\)/ || /\%edi/ || /^\t(scas|cmps)/ ) ) { # Hp (edi)
1571 $entry_patch .= "\tmovl \%edi,${OFFSET_Hp}(\%ebx)\n";
1572 $exit_patch .= "\tmovl ${OFFSET_Hp}(\%ebx),\%edi\n";
1574 # nothing for call_{entry,exit} because %edi is callee-save
1577 # --------------------------------------------------------
1578 # next, here we go with non-%esp patching!
1580 s/^(\t[a-z])/$entry_patch$1/; # before first instruction
1582 # Before calling GC we must set up the exit condition before the call
1583 # and entry condition when we come back
1585 # fix _all_ non-local jumps:
1587 if ( $TargetPlatform =~ /^.*-apple-darwin.*/ ) {
1588 # On Darwin, we've got local-looking jumps that are
1589 # actually global (i.e. jumps to Lfoo$stub or via
1590 # Lfoo$non_lazy_ptr), so we fix those first.
1591 # In fact, we just fix everything that contains a dollar
1592 # because false positives don't hurt here.
1594 s/^(\tjmp\s+\*?L.*\$.*\n)/$exit_patch$1/g;
1597 s/^\tjmp\s+\*${T_X86_PRE_LLBL_PAT}/\tJMP___SL/go;
1598 s/^\tjmp\s+${T_X86_PRE_LLBL_PAT}/\tJMP___L/go;
1600 s/^(\tjmp\s+.*\n)/$exit_patch$1/g; # here's the fix...
1602 s/^\tJMP___SL/\tjmp \*${T_X86_PRE_LLBL}/go;
1603 s/^\tJMP___L/\tjmp ${T_X86_PRE_LLBL}/go;
1605 if ($StolenX86Regs == 2 ) {
1606 die "ARGH! Jump uses \%esi or \%edi with -monly-2-regs:\n$_"
1607 if /^\t(jmp|call)\s+.*\%e(si|di)/;
1608 } elsif ($StolenX86Regs == 3 ) {
1609 die "ARGH! Jump uses \%edi with -monly-3-regs:\n$_"
1610 if /^\t(jmp|call)\s+.*\%edi/;
1613 # --------------------------------------------------------
1614 # that's it -- print it
1616 #die "Funny jumps?\n$_" if /${T_X86_BADJMP}/o; # paranoia
1620 if ( $need_fallthru_patch ) { # exit patch for end of slow entry code
1621 print OUTASM $exit_patch;
1622 # ToDo: make it not print if there is a "jmp" at the end
1628 sub init_FUNNY_THINGS {
1629 %KNOWN_FUNNY_THING = (
1631 # "${T_US}stg_.*{T_POST_LBL}", 1,
1636 The following table reversal is used for both info tables and return
1637 vectors. In both cases, we remove the first entry from the table,
1638 reverse the table, put the label at the end, and paste some code
1639 (that which is normally referred to by the first entry in the table)
1640 right after the table itself. (The code pasting is done elsewhere.)
1644 local($symb, $tbl, $discard1) = @_;
1646 return ($tbl) if ($TargetPlatform =~ /^ia64-/);
1648 local($before) = '';
1650 local(@imports) = (); # hppa only
1653 local(@lines) = split(/\n/, $tbl);
1656 # Deal with the header...
1657 for ($i = 0; $i <= $#lines && $lines[$i] !~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1658 $label .= $lines[$i] . "\n",
1659 next if $lines[$i] =~ /^[A-Za-z0-9_]+_info${T_POST_LBL}$/o
1660 || $lines[$i] =~ /${T_DOT_GLOBAL}/o
1661 || $lines[$i] =~ /^${T_US}\S+_vtbl${T_POST_LBL}$/o;
1663 $before .= $lines[$i] . "\n"; # otherwise...
1667 $infoname =~ s/(.|\n)*^([A-Za-z0-9_]+_info)${T_POST_LBL}$(.|\n)*/\2/;
1669 # Grab the table data...
1670 if ( $TargetPlatform !~ /^hppa/ ) {
1671 for ( ; $i <= $#lines && $lines[$i] =~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1673 # Convert addresses of SRTs, slow entrypoints and large bitmaps
1674 # to offsets (relative to the info label),
1675 # in order to support position independent code.
1676 $line =~ s/$infoname/0/
1677 || $line =~ s/([A-Za-z0-9_]+_srtd)$/\1 - $infoname/
1678 || $line =~ s/([A-Za-z0-9_]+_srt(\+\d+)?)$/\1 - $infoname/
1679 || $line =~ s/([A-Za-z0-9_]+_slow)$/\1 - $infoname/
1680 || $line =~ s/([A-Za-z0-9_]+_btm)$/\1 - $infoname/
1681 || $line =~ s/([A-Za-z0-9_]+_alt)$/\1 - $infoname/
1682 || $line =~ s/([A-Za-z0-9_]+_dflt)$/\1 - $infoname/
1683 || $line =~ s/([A-Za-z0-9_]+_ret)$/\1 - $infoname/;
1684 push(@words, $line);
1686 } else { # hppa weirdness
1687 for ( ; $i <= $#lines && $lines[$i] =~ /^\s+(${T_DOT_WORD}|\.IMPORT)/; $i++) {
1688 # FIXME: the RTS now expects offsets instead of addresses
1689 # for all labels in info tables.
1690 if ($lines[$i] =~ /^\s+\.IMPORT/) {
1691 push(@imports, $lines[$i]);
1693 # We don't use HP's ``function pointers''
1694 # We just use labels in code space, like normal people
1695 $lines[$i] =~ s/P%//;
1696 push(@words, $lines[$i]);
1701 # Now throw away any initial zero word from the table. This is a hack
1702 # that lets us reduce the size of info tables when the SRT field is not
1703 # needed: see comments StgFunInfoTable in InfoTables.h.
1705 # The .zero business is for Linux/ELF.
1706 # The .skip business is for Sparc/Solaris/ELF.
1707 # The .blockz business is for HPPA.
1709 # if ($words[0] =~ /^\t?(${T_DOT_WORD}\s+0|\.zero\s+4|\.skip\s+4|\.blockz\s+4)/) {
1714 for (; $i <= $#lines; $i++) {
1715 $after .= $lines[$i] . "\n";
1718 # Alphas: If we have anonymous text (not part of a procedure), the
1719 # linker may complain about missing exception information. Bleh.
1720 # To suppress this, we place a .ent/.end pair around the code.
1721 # At the same time, we have to be careful and not enclose any leading
1722 # .file/.loc directives.
1723 if ( $TargetPlatform =~ /^alpha-/ && $label =~ /^([A-Za-z0-9_]+):$/) {
1724 local ($ident) = $1;
1725 $before =~ s/^((\s*\.(file|loc)\s+[^\n]*\n)*)/$1\t.ent $ident\n/;
1726 $after .= "\t.end $ident\n";
1729 # Alphas: The heroic Simon Marlow found a bug in the Digital UNIX
1730 # assembler (!) wherein .quad constants inside .text sections are
1731 # first narrowed to 32 bits then sign-extended back to 64 bits.
1732 # This obviously screws up our 64-bit bitmaps, so we work around
1733 # the bug by replacing .quad with .align 3 + .long + .long [ccshan]
1734 if ( $TargetPlatform =~ /^alpha-/ ) {
1736 if (/^\s*\.quad\s+([-+0-9].*\S)\s*$/ && length $1 >= 10) {
1737 local ($number) = $1;
1738 if ($number =~ /^([-+])?(0x?)?([0-9]+)$/) {
1739 local ($sign, $base, $digits) = ($1, $2, $3);
1740 $base = (10, 8, 16)[length $base];
1741 local ($hi, $lo) = (0, 0);
1742 foreach $i (split(//, $digits)) {
1743 $j = $lo * $base + $i;
1744 $lo = $j % 4294967296;
1745 $hi = $hi * $base + ($j - $lo) / 4294967296;
1747 ($hi, $lo) = (4294967295 - $hi, 4294967296 - $lo)
1749 $_ = "\t.align 3\n\t.long $lo\n\t.long $hi\n";
1750 # printf STDERR "TURNING %s into 0x %08x %08x\n", $number, $hi, $lo;
1752 print STDERR "Cannot handle \".quad $number\" in info table\n";
1759 if ( $TargetPlatform =~ /x86_64-apple-darwin/ ) {
1760 # Tack a label to the front of the info table, too.
1761 # For now, this just serves to work around a crash in Apple's new
1762 # 64-bit linker (it seems to assume that there is no data before the
1763 # first label in a section).
1765 # The plan for the future is to do this on all Darwin platforms, and
1766 # to add a reference to this label after the entry code, just as the
1767 # NCG does, so we can enable dead-code-stripping in the linker without
1768 # losing our info tables. (Hence the name _dsp, for dead-strip preventer)
1770 $before .= "\n${infoname}_dsp:\n";
1774 . (($TargetPlatform !~ /^hppa/) ? '' : join("\n", @imports) . "\n")
1775 . join("\n", @words) . "\n"
1778 # print STDERR "before=$before\n";
1779 # print STDERR "label=$label\n";
1780 # print STDERR "words=",(reverse @words),"\n";
1781 # print STDERR "after=$after\n";
1787 The HP is a major nuisance. The threaded code mangler moved info
1788 tables from data space to code space, but unthreaded code in the RTS
1789 still has references to info tables in data space. Since the HP
1790 linker is very precise about where symbols live, we need to patch the
1791 references in the unthreaded RTS as well.
1794 sub mini_mangle_asm_hppa {
1795 local($in_asmf, $out_asmf) = @_;
1797 open(INASM, "< $in_asmf")
1798 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
1799 open(OUTASM,"> $out_asmf")
1800 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
1803 s/_info,DATA/_info,CODE/; # Move _info references to code space
1809 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1810 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1816 sub tidy_up_and_die {
1817 local($return_val, $msg) = @_;
1819 exit (($return_val == 0) ? 0 : 1);