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*(\.align \d+|\.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*(\.align \d+|\.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 =~ /^powerpc-.*-linux/ ) {
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 = '^#'; # 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*(\.(p2)?align\s+\d+(,\s*0x90)?|\.globl\s+\S+|\.text|\.data|\.section\s+.*|\.type\s+.*|\.size\s+\S+\s*,\s*\d+|\.ident.*|\.local.*)\n)';
356 $T_COPY_DIRVS = '^\s*\.(globl|type|size|local)';
358 $T_DOT_WORD = '\.(long|short|byte|fill|space)';
359 $T_DOT_GLOBAL = '\.globl';
360 $T_HDR_toc = "\.toc\n";
361 $T_HDR_literal = "\t\.section\t.rodata\n\t\.align 2\n";
362 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
363 $T_HDR_data = "\t\.data\n\t\.align 2\n";
364 $T_HDR_rodata = "\t\.section\t.rodata\n\t\.align 2\n";
365 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
366 $T_HDR_info = "\t\.text\n\t\.align 2\n";
367 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
368 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
370 #--------------------------------------------------------#
371 } elsif ( $TargetPlatform =~ /^powerpc64-.*-linux/ ) {
373 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
374 $T_US = '\.'; # _ if symbols have an underscore on the front
375 $T_PRE_APP = '^#'; # regexp that says what comes before APP/NO_APP
376 $T_CONST_LBL = '^\.LC\d+:'; # regexp for what such a lbl looks like
379 $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)';
380 $T_COPY_DIRVS = '^\s*\.(globl|type|size|local)';
382 $T_DOT_WORD = '\.(long|short|byte|fill|space)';
383 $T_DOT_GLOBAL = '\.globl';
384 $T_HDR_toc = "\.toc\n";
385 $T_HDR_literal = "\t\.section\t\".toc\",\"aw\"\n";
386 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
387 $T_HDR_data = "\t\.data\n\t\.align 2\n";
388 $T_HDR_rodata = "\t\.section\t.rodata\n\t\.align 2\n";
389 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
390 $T_HDR_info = "\t\.text\n\t\.align 2\n";
391 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
392 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
394 #--------------------------------------------------------#
395 } elsif ( $TargetPlatform =~ /^sparc-.*-(solaris2|openbsd)/ ) {
397 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
398 $T_US = ''; # _ if symbols have an underscore on the front
399 $T_PRE_APP = 'DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
400 $T_CONST_LBL = '^\.LLC(\d+):$'; # regexp for what such a lbl looks like
403 $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)';
404 $T_COPY_DIRVS = '\.(global|local|proc|stab)';
406 $T_DOT_WORD = '\.(long|word|byte|half|skip|uahalf|uaword)';
407 $T_DOT_GLOBAL = '^\t\.global';
408 $T_HDR_literal = "\.text\n\t\.align 8\n";
409 $T_HDR_misc = "\.text\n\t\.align 4\n";
410 $T_HDR_data = "\.data\n\t\.align 8\n";
411 $T_HDR_rodata = "\.text\n\t\.align 4\n";
412 $T_HDR_closure = "\.data\n\t\.align 4\n";
413 $T_HDR_info = "\.text\n\t\.align 4\n";
414 $T_HDR_entry = "\.text\n\t\.align 4\n";
415 $T_HDR_vector = "\.text\n\t\.align 4\n";
417 #--------------------------------------------------------#
418 } elsif ( $TargetPlatform =~ /^sparc-.*-sunos4/ ) {
420 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
421 $T_US = '_'; # _ if symbols have an underscore on the front
422 $T_PRE_APP = '^# DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
423 $T_CONST_LBL = '^LC(\d+):$';
426 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.stab.*)\n)';
427 $T_COPY_DIRVS = '\.(global|proc|stab)';
429 $T_DOT_WORD = '\.word';
430 $T_DOT_GLOBAL = '^\t\.global';
431 $T_HDR_literal = "\.text\n\t\.align 8\n";
432 $T_HDR_misc = "\.text\n\t\.align 4\n";
433 $T_HDR_data = "\.data\n\t\.align 8\n";
434 $T_HDR_rodata = "\.text\n\t\.align 4\n";
435 $T_HDR_closure = "\.data\n\t\.align 4\n";
436 $T_HDR_info = "\.text\n\t\.align 4\n";
437 $T_HDR_entry = "\.text\n\t\.align 4\n";
438 $T_HDR_vector = "\.text\n\t\.align 4\n";
440 #--------------------------------------------------------#
441 } elsif ( $TargetPlatform =~ /^sparc-.*-linux/ ) {
442 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
443 $T_US = ''; # _ if symbols have an underscore on the front
444 $T_PRE_APP = '#'; # regexp that says what comes before APP/NO_APP
445 # Probably doesn't apply anyway
446 $T_CONST_LBL = '^\.LLC(\d+):$'; # regexp for what such a lbl looks like
449 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.seg|\.stab.*|\s+?\.section.*|\s+\.type.*|\s+\.size.*)\n)';
450 $T_COPY_DIRVS = '\.(global|globl|proc|stab)';
452 $T_DOT_WORD = '\.(long|word|nword|xword|byte|half|short|skip|uahalf|uaword)';
453 $T_DOT_GLOBAL = '^\t\.global';
454 $T_HDR_literal = "\.text\n\t\.align 8\n";
455 $T_HDR_misc = "\.text\n\t\.align 4\n";
456 $T_HDR_data = "\.data\n\t\.align 8\n";
457 $T_HDR_rodata = "\.text\n\t\.align 4\n";
458 $T_HDR_closure = "\.data\n\t\.align 4\n";
459 $T_HDR_info = "\.text\n\t\.align 4\n";
460 $T_HDR_entry = "\.text\n\t\.align 4\n";
461 $T_HDR_vector = "\.text\n\t\.align 4\n";
463 #--------------------------------------------------------#
465 print STDERR "$Pgm: don't know how to mangle assembly language for: $TargetPlatform\n";
469 if($T_HDR_relrodata eq "") {
471 # relrodata defaults to rodata.
472 $T_HDR_relrodata = $T_HDR_rodata;
476 print STDERR "T_STABBY: $T_STABBY\n";
477 print STDERR "T_US: $T_US\n";
478 print STDERR "T_PRE_APP: $T_PRE_APP\n";
479 print STDERR "T_CONST_LBL: $T_CONST_LBL\n";
480 print STDERR "T_POST_LBL: $T_POST_LBL\n";
481 if ( $TargetPlatform =~ /^i386-/ ) {
482 print STDERR "T_X86_PRE_LLBL_PAT: $T_X86_PRE_LLBL_PAT\n";
483 print STDERR "T_X86_PRE_LLBL: $T_X86_PRE_LLBL\n";
484 print STDERR "T_X86_BADJMP: $T_X86_BADJMP\n";
486 print STDERR "T_MOVE_DIRVS: $T_MOVE_DIRVS\n";
487 print STDERR "T_COPY_DIRVS: $T_COPY_DIRVS\n";
488 print STDERR "T_DOT_WORD: $T_DOT_WORD\n";
489 print STDERR "T_HDR_literal: $T_HDR_literal\n";
490 print STDERR "T_HDR_misc: $T_HDR_misc\n";
491 print STDERR "T_HDR_data: $T_HDR_data\n";
492 print STDERR "T_HDR_rodata: $T_HDR_rodata\n";
493 print STDERR "T_HDR_closure: $T_HDR_closure\n";
494 print STDERR "T_HDR_info: $T_HDR_info\n";
495 print STDERR "T_HDR_entry: $T_HDR_entry\n";
496 print STDERR "T_HDR_vector: $T_HDR_vector\n";
502 %************************************************************************
504 \subsection{Mangle away}
506 %************************************************************************
510 local($in_asmf, $out_asmf) = @_;
512 # multi-line regexp matching:
517 &init_TARGET_STUFF();
518 &init_FUNNY_THINGS();
520 open(INASM, "< $in_asmf")
521 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
522 open(OUTASM,"> $out_asmf")
523 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
525 # read whole file, divide into "chunks":
526 # record some info about what we've found...
528 @chk = (); # contents of the chunk
529 $numchks = 0; # number of them
530 @chkcat = (); # what category of thing in each chunk
531 @chksymb = (); # what symbol(base) is defined in this chunk
532 %entrychk = (); # ditto, its entry code
533 %closurechk = (); # ditto, the (static) closure
534 %srtchk = (); # ditto, its SRT (for top-level things)
535 %infochk = (); # given a symbol base, say what chunk its info tbl is in
536 %vectorchk = (); # ditto, return vector table
537 $EXTERN_DECLS = ''; # .globl <foo> .text (MIPS only)
539 $i = 0; $chkcat[0] = 'misc'; $chk[0] = '';
542 tr/\r//d if $TargetPlatform =~ /-mingw32$/; # In case Perl doesn't convert line endings
543 next if $T_STABBY && /^\.stab.*${T_US}__stg_split_marker/o;
544 next if $T_STABBY && /^\.stab.*ghc.*c_ID/;
545 next if /^\t\.def.*endef$/;
546 next if /${T_PRE_APP}(NO_)?APP/o;
547 next if /^;/ && $TargetPlatform =~ /^hppa/;
549 next if /(^$|^\t\.file\t|^ # )/ && $TargetPlatform =~ /^(mips|ia64)-/;
551 if ( $TargetPlatform =~ /^mips-/
552 && /^\t\.(globl\S+\.text|comm\t)/ ) {
553 $EXTERN_DECLS .= $_ unless /(__DISCARD__|\b(PK_|ASSIGN_)(FLT|DBL)\b)/;
554 # Treat .comm variables as data. These show up in two (known) places:
556 # - the module_registered variable used in the __stginit fragment.
557 # even though these are declared static and initialised, gcc 3.3
558 # likes to make them .comm, presumably to save space in the
561 # - global variables used to pass arguments from C to STG in
562 # a foreign export. (is this still true? --SDM)
564 } elsif ( /^\t\.comm.*$/ ) {
566 $chkcat[$i] = 'data';
569 # Labels ending "_str": these are literal strings.
570 } elsif ( /^${T_US}([A-Za-z0-9_]+)_str${T_POST_LBL}$/ ) {
572 $chkcat[$i] = 'rodata';
574 } elsif ( $TargetPlatform =~ /-darwin/
575 && (/^\s*\.subsections_via_symbols/
576 ||/^\s*\.no_dead_strip.*/)) {
577 # Don't allow Apple's linker to do any dead-stripping of symbols
578 # in this file, because it will mess up info-tables in mangled
580 # The .no_dead_strip directives are actually put there by
581 # the gcc3 "used" attribute on entry points.
583 } elsif ( $TargetPlatform =~ /^.*-apple-darwin.*/ && (
584 /^\s*\.picsymbol_stub/
585 || /^\s*\.section __TEXT,__picsymbol_stub\d,.*/
586 || /^\s*\.section __TEXT,__picsymbolstub\d,.*/
587 || /^\s*\.symbol_stub/
588 || /^\s*\.section __TEXT,__symbol_stub\d,.*/
589 || /^\s*\.section __TEXT,__symbolstub\d,.*/
590 || /^\s*\.lazy_symbol_pointer/
591 || /^\s*\.non_lazy_symbol_pointer/
592 || /^\s*\.section __IMPORT.*/))
595 $chkcat[$i] = 'dyld';
599 } elsif ( $TargetPlatform =~ /^.*-apple-darwin.*/ && $chkcat[$i] eq 'dyld' && /^\s*\.data/)
600 { # non_lazy_symbol_ptrs that point to local symbols
602 $chkcat[$i] = 'dyld';
605 } elsif ( $TargetPlatform =~ /^.*-apple-darwin.*/ && $chkcat[$i] eq 'dyld' && /^\s*\.align/)
606 { # non_lazy_symbol_ptrs that point to local symbols
608 } elsif ( $TargetPlatform =~ /^.*-apple-darwin.*/ && $chkcat[$i] eq 'dyld' && /^L_.*:$/)
609 { # non_lazy_symbol_ptrs that point to local symbols
610 $chk[++$i] = $dyld_section . $_;
611 $chkcat[$i] = 'dyld';
614 } elsif ( /^\s+/ ) { # most common case first -- a simple line!
615 # duplicated from the bottom
619 } elsif ( /\.\.ng:$/ && $TargetPlatform =~ /^alpha-/ ) {
620 # Alphas: Local labels not to be confused with new chunks
622 # NB: all the rest start with a non-space
624 } elsif ( $TargetPlatform =~ /^mips-/
625 && /^\d+:/ ) { # a funny-looking very-local label
628 } elsif ( /$T_CONST_LBL/o ) {
630 $chkcat[$i] = 'literal';
633 } elsif ( /^${T_US}__stg_split_marker(\d*)${T_POST_LBL}$/o ) {
635 $chkcat[$i] = 'splitmarker';
638 } elsif ( /^${T_US}([A-Za-z0-9_]+)_info${T_POST_LBL}$/o ) {
641 $chkcat[$i] = 'infotbl';
642 $chksymb[$i] = $symb;
644 die "Info table already? $symb; $i\n" if defined($infochk{$symb});
646 $infochk{$symb} = $i;
648 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(entry|ret)${T_POST_LBL}$/o ) {
650 $chkcat[$i] = 'entry';
655 } elsif ( /^${T_US}([A-Za-z0-9_]+)_closure${T_POST_LBL}$/o ) {
657 $chkcat[$i] = 'closure';
660 $closurechk{$1} = $i;
662 } elsif ( /^${T_US}([A-Za-z0-9_]+)_srt${T_POST_LBL}$/o ) {
669 } elsif ( /^${T_US}([A-Za-z0-9_]+)_ct${T_POST_LBL}$/o ) {
671 $chkcat[$i] = 'data';
674 } elsif ( /^${T_US}(stg_ap_stack_entries|stg_stack_save_entries|stg_arg_bitmaps)${T_POST_LBL}$/o ) {
676 $chkcat[$i] = 'data';
679 } elsif ( /^(${T_US}__gnu_compiled_c|gcc2_compiled\.)${T_POST_LBL}/o ) {
682 } elsif ( /^${T_US}[A-Za-z0-9_]+\.\d+${T_POST_LBL}$/o
683 || /^${T_US}.*_CAT${T_POST_LBL}$/o # PROF: _entryname_CAT
684 || /^${T_US}.*_done${T_POST_LBL}$/o # PROF: _module_done
685 || /^${T_US}_module_registered${T_POST_LBL}$/o # PROF: _module_registered
688 $chkcat[$i] = 'data';
691 } elsif ( /^([A-Za-z0-9_]+)\s+\.comm/ && $TargetPlatform =~ /^hppa/ ) {
696 } elsif ( /^${T_US}([A-Za-z0-9_]+)_cc(s)?${T_POST_LBL}$/o ) {
697 # all CC_ symbols go in the data section...
699 $chkcat[$i] = 'data';
702 } elsif ( /^${T_US}([A-Za-z0-9_]+)_hpc?${T_POST_LBL}$/o ) {
703 # hpc shares tick boxes across modules
705 $chkcat[$i] = 'data';
708 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(alt|dflt)${T_POST_LBL}$/o ) {
710 $chkcat[$i] = 'misc';
712 } elsif ( /^${T_US}([A-Za-z0-9_]+)_vtbl${T_POST_LBL}$/o ) {
714 $chkcat[$i] = 'vector';
719 } elsif ( $TargetPlatform =~ /^i386-.*-solaris2/
720 && /^[A-Za-z0-9][A-Za-z0-9_]*:/ ) {
721 # Some Solaris system headers contain function definitions (as
722 # opposed to mere prototypes), which end up in the .hc file when
723 # a Haskell module foreign imports the corresponding system
724 # functions (most notably stat()). We put them into the text
725 # segment. Note that this currently does not extend to function
726 # names starting with an underscore.
729 $chkcat[$i] = 'misc';
732 } elsif ( $TargetPlatform =~ /^i386-apple-darwin/ && /^(___i686\.get_pc_thunk\.[abcd]x):/o) {
733 # To handle PIC on Darwin/x86, we need to appropriately pass through
734 # the get_pc_thunk functions. The need to be put into a special section
735 # marked as coalesced (otherwise the .weak_definition doesn't work
738 $chkcat[$i] = 'get_pc_thunk';
741 } elsif ( /^${T_US}[A-Za-z0-9_]/o
742 && ( $TargetPlatform !~ /^hppa/ # need to avoid local labels in this case
744 && ( $TargetPlatform !~ /^powerpc64/ # we need to avoid local labels in this case
745 || ! /^\.L\d+:$/ ) ) {
752 /^${T_US}stg_.*${T_POST_LBL}$/o # RTS internals
753 || /^${T_US}__stg_.*${T_POST_LBL}$/o # more RTS internals
754 || /^${T_US}__fexp_.*${T_POST_LBL}$/o # foreign export
755 || /^${T_US}.*_slow${T_POST_LBL}$/o # slow entry
756 || /^${T_US}__stginit.*${T_POST_LBL}$/o # __stginit<module>
757 || /^${T_US}.*_btm${T_POST_LBL}$/o # large bitmaps
758 || /^${T_US}.*_fast${T_POST_LBL}$/o # primops
759 || /^_uname:/o # x86/Solaris2
762 $chkcat[$i] = 'misc';
764 /^${T_US}.*_srtd${T_POST_LBL}$/o # large bitmaps
765 || /^${T_US}.*_closure_tbl${T_POST_LBL}$/o # closure tables
768 $chkcat[$i] = 'relrodata';
771 print STDERR "Warning: retaining unknown function \`$thing' in output from C compiler\n";
772 $chkcat[$i] = 'unknown';
775 } elsif ( $TargetPlatform =~ /^powerpc-.*-linux/ && /^\.LCTOC1 = /o ) {
776 # PowerPC Linux's large-model PIC (-fPIC) generates a gobal offset
777 # table "by hand". Be sure to copy it over.
778 # Note that this label and all entries in the table should actually
779 # go into the .got2 section, but it isn't easy to distinguish them
780 # from other constant literals (.LC\d+), so we just put everything
783 $chkcat[$i] = 'literal';
784 $chksymb[$i] = 'LCTOC1';
785 } else { # simple line (duplicated at the top)
790 $numchks = $#chk + 1;
792 # open CHUNKS, ">/tmp/chunks1" or die "Cannot open /tmp/chunks1: $!\n";
793 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
796 # the division into chunks is imperfect;
797 # we throw some things over the fence into the next
800 # also, there are things we would like to know
801 # about the whole module before we start spitting
804 local($FIRST_MANGLABLE) = ($TargetPlatform =~ /^(alpha-|hppa|mips-)/) ? 1 : 0;
805 local($FIRST_TOSSABLE ) = ($TargetPlatform =~ /^(hppa|mips-)/) ? 1 : 0;
807 # print STDERR "first chunk to mangle: $FIRST_MANGLABLE\n";
809 # Alphas: NB: we start meddling at chunk 1, not chunk 0
810 # The first ".rdata" is quite magical; as of GCC 2.7.x, it
811 # spits a ".quad 0" in after the very first ".rdata"; we
812 # detect this special case (tossing the ".quad 0")!
813 local($magic_rdata_seen) = 0;
815 # HPPAs, MIPSen: also start medding at chunk 1
817 for ($i = $FIRST_TOSSABLE; $i < $numchks; $i++) {
818 $c = $chk[$i]; # convenience copy
820 # print STDERR "\nCHK $i (BEFORE) (",$chkcat[$i],"):\n", $c;
822 # toss all prologue stuff; HPPA is pretty weird
824 $c = &hppa_mash_prologue($c) if $TargetPlatform =~ /^hppa-/;
826 # be slightly paranoid to make sure there's
827 # nothing surprising in there
828 if ( $c =~ /--- BEGIN ---/ ) {
829 if (($p, $r) = split(/--- BEGIN ---/, $c)) {
831 # remove junk whitespace around the split point
835 if ($TargetPlatform =~ /^i386-/) {
836 if ($p =~ /^\tsubl\s+\$(\d+),\s*\%esp\n/) {
838 die "Error: reserved stack space exceeded!\n Possible workarounds: compile with -fasm, or try another version of gcc.\n"
842 # gcc 3.4.3 puts this kind of stuff in the prologue, eg.
843 # when compiling PrimOps.cmm with -optc-O2:
846 # movl %ecx, 16(%esp)
847 # movl %edx, 20(%esp)
848 # but then the code of the function doesn't assume
849 # anything about the contnets of these stack locations.
850 # I think it's to do with the use of inline functions for
851 # PK_Word64() and friends, where gcc is initialising the
852 # contents of the struct to zero, and failing to optimise
853 # away the initialisation. Let's live dangerously and
854 # discard these initalisations.
856 $p =~ s/^\tpushl\s+\%e(di|si|bx)\n//g;
857 $p =~ s/^\txorl\s+\%e(ax|cx|dx),\s*\%e(ax|cx|dx)\n//g;
858 $p =~ s/^\tmovl\s+\%e(ax|cx|dx|si|di),\s*\d*\(\%esp\)\n//g;
859 $p =~ s/^\tmovl\s+\$\d+,\s*\d*\(\%esp\)\n//g;
860 $p =~ s/^\tsubl\s+\$\d+,\s*\%esp\n//;
861 $p =~ s/^\tmovl\s+\$\d+,\s*\%eax\n\tcall\s+__alloca\n// if ($TargetPlatform =~ /^.*-(cygwin32|mingw32)/);
863 if ($TargetPlatform =~ /^i386-apple-darwin/) {
865 $pcrel_label =~ s/(.|\n)*^(\"?L\d+\$pb\"?):\n(.|\n)*/$2/ or $pcrel_label = "";
867 $pcrel_reg =~ s/(.|\n)*.*___i686\.get_pc_thunk\.([abcd]x)\n(.|\n)*/$2/ or $pcrel_reg = "";
868 $p =~ s/^\s+call\s+___i686\.get_pc_thunk\..x//;
869 $p =~ s/^\"?L\d+\$pb\"?:\n//;
871 if ($pcrel_reg eq "bx") {
872 # Bad gcc. Goes and uses %ebx, our BaseReg, for PIC. Bad gcc.
873 die "Darwin/x86: -fPIC -via-C doesn't work yet, use -fasm. Aborting."
877 } elsif ($TargetPlatform =~ /^x86_64-/) {
878 $p =~ s/^\tpushq\s+\%r(bx|bp|12|13|14)\n//g;
879 $p =~ s/^\tmovq\s+\%r(bx|bp|12|13|14),\s*\d*\(\%rsp\)\n//g;
880 $p =~ s/^\tsubq\s+\$\d+,\s*\%rsp\n//;
882 } elsif ($TargetPlatform =~ /^ia64-/) {
883 $p =~ s/^\t\.prologue .*\n//;
884 $p =~ s/^\t\.save ar\.pfs, r\d+\n\talloc r\d+ = ar\.pfs, 0, 3[12], \d+, 0\n//;
885 $p =~ s/^\t\.fframe \d+\n\tadds r12 = -\d+, r12\n//;
886 $p =~ s/^\t\.save rp, r\d+\n\tmov r\d+ = b0\n//;
887 $p =~ s/^\t\.(mii|mmi)\n//g; # bundling is no longer sensible
888 $p =~ s/^\t;;\n//g; # discard stops
889 $p =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
891 # GCC 3.3 saves r1 in the prologue, move this to the body
892 if ($p =~ /^\tmov r\d+ = r1\n/) {
896 } elsif ($TargetPlatform =~ /^m68k-/) {
897 $p =~ s/^\tlink a6,#-?\d.*\n//;
898 $p =~ s/^\tpea a6@\n\tmovel sp,a6\n//;
899 # The above showed up in the asm code,
900 # so I added it here.
901 # I hope it's correct.
903 $p =~ s/^\tmovel d2,sp\@-\n//;
904 $p =~ s/^\tmovel d5,sp\@-\n//; # SMmark.* only?
905 $p =~ s/^\tmoveml \#0x[0-9a-f]+,sp\@-\n//; # SMmark.* only?
906 } elsif ($TargetPlatform =~ /^mips-/) {
907 # the .frame/.mask/.fmask that we use is the same
908 # as that produced by GCC for miniInterpret; this
909 # gives GDB some chance of figuring out what happened
910 $FRAME = "\t.frame\t\$sp,2168,\$31\n\t.mask\t0x90000000,-4\n\t.fmask\t0x00000000,0\n";
911 $p =~ s/^\t\.(frame).*\n/__FRAME__/g;
912 $p =~ s/^\t\.(mask|fmask).*\n//g;
913 $p =~ s/^\t\.cprestore.*\n/\t\.cprestore 416\n/; # 16 + 100 4-byte args
914 $p =~ s/^\tsubu\t\$sp,\$sp,\d+\n//;
915 $p =~ s/^\tsw\t\$31,\d+\(\$sp\)\n//;
916 $p =~ s/^\tsw\t\$fp,\d+\(\$sp\)\n//;
917 $p =~ s/^\tsw\t\$28,\d+\(\$sp\)\n//;
918 $p =~ s/__FRAME__/$FRAME/;
919 } elsif ($TargetPlatform =~ /^powerpc-apple-darwin.*/) {
921 $pcrel_label =~ s/(.|\n)*^(\"?L\d+\$pb\"?):\n(.|\n)*/$2/ or $pcrel_label = "";
923 $p =~ s/^\tmflr r0\n//;
924 $p =~ s/^\tbl saveFP # f\d+\n//;
925 $p =~ s/^\tbl saveFP ; save f\d+-f\d+\n//;
926 $p =~ s/^\"?L\d+\$pb\"?:\n//;
927 $p =~ s/^\tstmw r\d+,-\d+\(r1\)\n//;
928 $p =~ s/^\tstfd f\d+,-\d+\(r1\)\n//g;
929 $p =~ s/^\tstw r0,\d+\(r1\)\n//g;
930 $p =~ s/^\tstwu r1,-\d+\(r1\)\n//;
931 $p =~ s/^\tstw r\d+,-\d+\(r1\)\n//g;
932 $p =~ s/^\tbcl 20,31,L\d+\$pb\n//;
933 $p =~ s/^L\d+\$pb:\n//;
934 $p =~ s/^\tmflr r31\n//;
936 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
937 # under some circumstances, only when generating position dependent code.
938 # I have no idea why, and I don't think it is necessary, so let's toss it.
939 $p =~ s/^\tli r\d+,0\n//g;
940 $p =~ s/^\tstw r\d+,\d+\(r1\)\n//g;
941 } elsif ($TargetPlatform =~ /^powerpc-.*-linux/) {
942 $p =~ s/^\tmflr 0\n//;
943 $p =~ s/^\tstmw \d+,\d+\(1\)\n//;
944 $p =~ s/^\tstfd \d+,\d+\(1\)\n//g;
945 $p =~ s/^\tstw r0,8\(1\)\n//;
946 $p =~ s/^\tstwu 1,-\d+\(1\)\n//;
947 $p =~ s/^\tstw \d+,\d+\(1\)\n//g;
949 # GCC's "large-model" PIC (-fPIC)
951 $pcrel_label =~ s/(.|\n)*^.LCF(\d+):\n(.|\n)*/$2/ or $pcrel_label = "";
953 $p =~ s/^\tbcl 20,31,.LCF\d+\n//;
954 $p =~ s/^.LCF\d+:\n//;
955 $p =~ s/^\tmflr 30\n//;
956 $p =~ s/^\tlwz 0,\.LCL\d+-\.LCF\d+\(30\)\n//;
957 $p =~ s/^\tadd 30,0,30\n//;
959 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
960 # under some circumstances, only when generating position dependent code.
961 # I have no idea why, and I don't think it is necessary, so let's toss it.
962 $p =~ s/^\tli \d+,0\n//g;
963 $p =~ s/^\tstw \d+,\d+\(1\)\n//g;
964 } elsif ($TargetPlatform =~ /^powerpc64-.*-linux/) {
965 $p =~ s/^\tmr 31,1\n//;
966 $p =~ s/^\tmflr 0\n//;
967 $p =~ s/^\tstmw \d+,\d+\(1\)\n//;
968 $p =~ s/^\tstfd \d+,-?\d+\(1\)\n//g;
969 $p =~ s/^\tstd r0,8\(1\)\n//;
970 $p =~ s/^\tstdu 1,-\d+\(1\)\n//;
971 $p =~ s/^\tstd \d+,-?\d+\(1\)\n//g;
973 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
974 # under some circumstances, only when generating position dependent code.
975 # I have no idea why, and I don't think it is necessary, so let's toss it.
976 $p =~ s/^\tli \d+,0\n//g;
977 $p =~ s/^\tstd \d+,\d+\(1\)\n//g;
979 print STDERR "$Pgm: unknown prologue mangling? $TargetPlatform\n";
982 # HWL HACK: dont die, just print a warning
983 #print stderr "HWL: this should die! Prologue junk?: $p\n" if $p =~ /^\t[^\.]/;
984 die "Prologue junk?: $p\n" if $p =~ /^\s+[^\s\.]/;
986 # For PIC, we want to keep part of the prologue
987 if ($TargetPlatform =~ /^powerpc-apple-darwin.*/ && $pcrel_label ne "") {
988 # Darwin: load the current instruction pointer into register r31
989 $p .= "bcl 20,31,$pcrel_label\n";
990 $p .= "$pcrel_label:\n";
991 $p .= "\tmflr r31\n";
992 } elsif ($TargetPlatform =~ /^powerpc-.*-linux/ && $pcrel_label ne "") {
993 # Linux: load the GOT pointer into register 30
994 $p .= "\tbcl 20,31,.LCF$pcrel_label\n";
995 $p .= ".LCF$pcrel_label:\n";
997 $p .= "\tlwz 0,.LCL$pcrel_label-.LCF$pcrel_label(30)\n";
998 $p .= "\tadd 30,0,30\n";
999 } elsif ($TargetPlatform =~ /^i386-apple-darwin.*/ && $pcrel_label ne "") {
1000 $p .= "\tcall ___i686.get_pc_thunk.$pcrel_reg\n";
1001 $p .= "$pcrel_label:\n";
1004 # glue together what's left
1009 if ( $TargetPlatform =~ /^mips-/ ) {
1010 # MIPS: first, this basic sequence may occur "--- END ---" or not
1011 $c =~ s/^\tlw\t\$31,\d+\(\$sp\)\n\taddu\t\$sp,\$sp,\d+\n\tj\t\$31\n\t\.end/\t\.end/;
1014 # toss all epilogue stuff; again, paranoidly
1015 if ( $c =~ /--- END ---/ ) {
1016 if (($r, $e) = split(/--- END ---/, $c)) {
1017 if ($TargetPlatform =~ /^i386-/) {
1019 $e =~ s/^\tpopl\s+\%edi\n//;
1020 $e =~ s/^\tpopl\s+\%esi\n//;
1021 $e =~ s/^\tpopl\s+\%edx\n//;
1022 $e =~ s/^\tpopl\s+\%ecx\n//;
1023 $e =~ s/^\taddl\s+\$\d+,\s*\%esp\n//;
1024 $e =~ s/^\tsubl\s+\$-\d+,\s*\%esp\n//;
1025 } elsif ($TargetPlatform =~ /^ia64-/) {
1026 $e =~ s/^\tmov ar\.pfs = r\d+\n//;
1027 $e =~ s/^\tmov b0 = r\d+\n//;
1028 $e =~ s/^\t\.restore sp\n\tadds r12 = \d+, r12\n//;
1029 $e =~ s/^\tbr\.ret\.sptk\.many b0\n//;
1030 $e =~ s/^\t\.(mii|mmi|mib)\n//g; # bundling is no longer sensible
1031 $e =~ s/^\t;;\n//g; # discard stops - stop at end of body is sufficient
1032 $e =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
1033 } elsif ($TargetPlatform =~ /^m68k-/) {
1034 $e =~ s/^\tunlk a6\n//;
1036 } elsif ($TargetPlatform =~ /^mips-/) {
1037 $e =~ s/^\tlw\t\$31,\d+\(\$sp\)\n//;
1038 $e =~ s/^\tlw\t\$fp,\d+\(\$sp\)\n//;
1039 $e =~ s/^\taddu\t\$sp,\$sp,\d+\n//;
1040 $e =~ s/^\tj\t\$31\n//;
1041 } elsif ($TargetPlatform =~ /^powerpc-apple-darwin.*/) {
1042 $e =~ s/^\taddi r1,r1,\d+\n//;
1043 $e =~ s/^\tlwz r\d+,\d+\(r1\)\n//;
1044 $e =~ s/^\tlmw r\d+,-\d+\(r1\)\n//;
1045 $e =~ s/^\tmtlr r0\n//;
1047 $e =~ s/^\tb restFP ;.*\n//;
1048 } elsif ($TargetPlatform =~ /^powerpc64-.*-linux/) {
1049 $e =~ s/^\tmr 3,0\n//;
1050 $e =~ s/^\taddi 1,1,\d+\n//;
1051 $e =~ s/^\tld 0,16\(1\)\n//;
1052 $e =~ s/^\tmtlr 0\n//;
1054 # callee-save registers
1055 $e =~ s/^\tld \d+,-?\d+\(1\)\n//g;
1056 $e =~ s/^\tlfd \d+,-?\d+\(1\)\n//g;
1058 # get rid of the debug junk along with the blr
1059 $e =~ s/^\tblr\n\t.long .*\n\t.byte .*\n//;
1061 # incase we missed it with the last one get the blr alone
1064 print STDERR "$Pgm: unknown epilogue mangling? $TargetPlatform\n";
1067 print STDERR "WARNING: Epilogue junk?: $e\n" if $e =~ /^\t\s*[^\.\s\n]/;
1069 # glue together what's left
1071 $c =~ s/\n\t\n/\n/; # junk blank line
1075 # On SPARCs, we don't do --- BEGIN/END ---, we just
1076 # toss the register-windowing save/restore/ret* instructions
1077 # directly unless they've been generated by function definitions in header
1079 if ( $TargetPlatform =~ /^sparc-/ ) {
1080 if ( ! ( $TargetPlatform =~ /solaris2$/ && $chkcat[$i] eq 'unknown' )) {
1081 $c =~ s/^\t(save.*|restore.*|ret|retl)\n//g;
1083 # throw away PROLOGUE comments
1084 $c =~ s/^\t!#PROLOGUE# 0\n\t!#PROLOGUE# 1\n//;
1087 # On Alphas, the prologue mangling is done a little later (below)
1089 # toss all calls to __DISCARD__
1090 $c =~ s/^\t(call|jbsr|jal)\s+${T_US}__DISCARD__\n//go;
1091 $c =~ s/^\tjsr\s+\$26\s*,\s*${T_US}__DISCARD__\n//go if $TargetPlatform =~ /^alpha-/;
1092 $c =~ s/^\tbl\s+L___DISCARD__\$stub\n//go if $TargetPlatform =~ /^powerpc-apple-darwin.*/;
1093 $c =~ s/^\tbl\s+__DISCARD__(\@plt)?\n//go if $TargetPlatform =~ /^powerpc-.*-linux/;
1094 $c =~ s/^\tbl\s+\.__DISCARD__\n\s+nop\n//go if $TargetPlatform =~ /^powerpc64-.*-linux/;
1095 $c =~ s/^\tcall\s+L___DISCARD__\$stub\n//go if $TargetPlatform =~ /i386-apple-darwin.*/;
1097 # IA64: mangle tailcalls into jumps here
1098 if ($TargetPlatform =~ /^ia64-/) {
1099 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/) {
1100 # Eek, the gcc optimiser is getting smarter... if we see a jump to the --- TAILCALL ---
1101 # marker then we reapply the substitution at the source sites
1102 $c =~ s/^\tbr \.L$2\n/\t--- TAILCALL ---\n/g if ($2);
1106 # MIPS: that may leave some gratuitous asm macros around
1107 # (no harm done; but we get rid of them to be tidier)
1108 $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/
1109 if $TargetPlatform =~ /^mips-/;
1111 # toss stack adjustment after DoSparks
1112 $c =~ s/^(\tjbsr _DoSparks\n)\taddqw #8,sp/$1/g
1113 if $TargetPlatform =~ /^m68k-/; # this looks old...
1115 if ( $TargetPlatform =~ /^alpha-/ &&
1116 ! $magic_rdata_seen &&
1117 $c =~ /^\s*\.rdata\n\t\.quad 0\n\t\.align \d\n/ ) {
1118 $c =~ s/^\s*\.rdata\n\t\.quad 0\n\t\.align (\d)\n/\.rdata\n\t\.align $1\n/;
1119 $magic_rdata_seen = 1;
1122 # pick some end-things and move them to the next chunk
1124 # pin a funny end-thing on (for easier matching):
1125 $c .= 'FUNNY#END#THING';
1127 while ( $c =~ /${T_MOVE_DIRVS}FUNNY#END#THING/o ) {
1131 # on x86 we try not to copy any directives into a literal
1132 # chunk, rather we keep looking for the next real chunk. This
1133 # is because we get things like
1135 # .globl blah_closure
1141 if ( $TargetPlatform =~ /^(i386|sparc|powerpc)/ && $to_move =~ /${T_COPY_DIRVS}/ ) {
1143 while ( $j < $numchks && $chk[$j] =~ /$T_CONST_LBL/) {
1146 if ( $j < $numchks ) {
1147 $chk[$j] = $to_move . $chk[$j];
1151 elsif ( $i < ($numchks - 1)
1152 && ( $to_move =~ /${T_COPY_DIRVS}/
1153 || ($TargetPlatform =~ /^hppa/ && $to_move =~ /align/ && $chkcat[$i+1] eq 'literal') )) {
1154 $chk[$i + 1] = $to_move . $chk[$i + 1];
1155 # otherwise they're tossed
1158 $c =~ s/${T_MOVE_DIRVS}FUNNY#END#THING/FUNNY#END#THING/o;
1161 if ( $TargetPlatform =~ /^alpha-/ && $c =~ /^\t\.ent\s+(\S+)/ ) {
1163 # toss all prologue stuff, except for loading gp, and the ..ng address
1164 unless ($c =~ /\.ent.*\n\$.*\.\.ng:/) {
1165 if (($p, $r) = split(/^\t\.prologue/, $c)) {
1166 if (($keep, $junk) = split(/\.\.ng:/, $p)) {
1167 $keep =~ s/^\t\.frame.*\n/\t.frame \$30,0,\$26,0\n/;
1168 $keep =~ s/^\t\.(mask|fmask).*\n//g;
1169 $c = $keep . "..ng:\n";
1171 print STDERR "malformed code block ($ent)?\n"
1174 $c .= "\t.prologue" . $r;
1178 $c =~ s/FUNNY#END#THING//;
1180 # print STDERR "\nCHK $i (AFTER) (",$chkcat[$i],"):\n", $c;
1182 $chk[$i] = $c; # update w/ convenience copy
1185 # open CHUNKS, ">/tmp/chunks2" or die "Cannot open /tmp/chunks2: $!\n";
1186 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
1189 if ( $TargetPlatform =~ /^alpha-/ ) {
1190 # print out the header stuff first
1191 $chk[0] =~ s/^(\t\.file.*)"(ghc\d+\.c)"/$1"$ifile_root.hc"/;
1192 print OUTASM $chk[0];
1194 } elsif ( $TargetPlatform =~ /^hppa/ ) {
1195 print OUTASM $chk[0];
1197 } elsif ( $TargetPlatform =~ /^mips-/ ) {
1198 $chk[0] = "\t\.file\t1 \"$ifile_root.hc\"\n" . $chk[0];
1200 # get rid of horrible "<dollar>Revision: .*$" strings
1201 local(@lines0) = split(/\n/, $chk[0]);
1203 while ( $z <= $#lines0 ) {
1204 if ( $lines0[$z] =~ /^\t\.byte\t0x24,0x52,0x65,0x76,0x69,0x73,0x69,0x6f$/ ) {
1207 while ( $z <= $#lines0 ) {
1209 last if $lines0[$z] =~ /[,\t]0x0$/;
1215 $chk[0] = join("\n", @lines0);
1216 $chk[0] =~ s/\n\n+/\n/;
1217 print OUTASM $chk[0];
1220 # print out all the literal strings next
1221 for ($i = 0; $i < $numchks; $i++) {
1222 if ( $chkcat[$i] eq 'literal' ) {
1224 # HACK: try to detect 16-byte constants and align them
1225 # on a 16-byte boundary. x86_64 sometimes needs 128-bit
1226 # aligned constants, and so does Darwin/x86.
1227 if ( $TargetPlatform =~ /^x86_64/
1228 || $TargetPlatform =~ /^i386-apple-darwin/ ) {
1230 if ($z =~ /(\.long.*\n.*\.long.*\n.*\.long.*\n.*\.long|\.quad.*\n.*\.quad)/) {
1231 print OUTASM $T_HDR_literal16;
1233 print OUTASM $T_HDR_literal;
1236 print OUTASM $T_HDR_literal;
1239 print OUTASM $chk[$i];
1240 print OUTASM "; end literal\n" if $TargetPlatform =~ /^hppa/; # for the splitter
1242 $chkcat[$i] = 'DONE ALREADY';
1246 # on the HPPA, print out all the bss next
1247 if ( $TargetPlatform =~ /^hppa/ ) {
1248 for ($i = 1; $i < $numchks; $i++) {
1249 if ( $chkcat[$i] eq 'bss' ) {
1250 print OUTASM "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$BSS\$\n\t.align 4\n";
1251 print OUTASM $chk[$i];
1253 $chkcat[$i] = 'DONE ALREADY';
1258 for ($i = $FIRST_MANGLABLE; $i < $numchks; $i++) {
1259 # print STDERR "$i: cat $chkcat[$i], symb $chksymb[$i]\n";
1261 next if $chkcat[$i] eq 'DONE ALREADY';
1263 if ( $chkcat[$i] eq 'misc' || $chkcat[$i] eq 'unknown' ) {
1264 if ($chk[$i] ne '') {
1265 print OUTASM $T_HDR_misc;
1266 &print_doctored($chk[$i], 0);
1269 } elsif ( $chkcat[$i] eq 'toss' ) {
1270 print STDERR "*** NB: TOSSING code for $chksymb[$i] !!! ***\n";
1272 } elsif ( $chkcat[$i] eq 'data' ) {
1273 if ($chk[$i] ne '') {
1274 print OUTASM $T_HDR_data;
1275 print OUTASM $chk[$i];
1278 } elsif ( $chkcat[$i] eq 'splitmarker' ) {
1279 # we can just re-constitute this one...
1280 # NB: we emit _three_ underscores no matter what,
1281 # so ghc-split doesn't have to care.
1282 print OUTASM "___stg_split_marker",$chksymb[$i],"${T_POST_LBL}\n";
1284 } elsif ( $chkcat[$i] eq 'closure'
1285 || $chkcat[$i] eq 'srt'
1286 || $chkcat[$i] eq 'infotbl'
1287 || $chkcat[$i] eq 'entry') { # do them in that order
1288 $symb = $chksymb[$i];
1291 if ( defined($closurechk{$symb}) ) {
1292 print OUTASM $T_HDR_closure;
1293 print OUTASM $chk[$closurechk{$symb}];
1294 $chkcat[$closurechk{$symb}] = 'DONE ALREADY';
1298 if ( defined($srtchk{$symb}) ) {
1299 print OUTASM $T_HDR_relrodata;
1300 print OUTASM $chk[$srtchk{$symb}];
1301 $chkcat[$srtchk{$symb}] = 'DONE ALREADY';
1305 if ( defined($infochk{$symb}) ) {
1307 print OUTASM $T_HDR_info;
1308 print OUTASM &rev_tbl($symb, $chk[$infochk{$symb}], 1);
1310 # entry code will be put here!
1312 $chkcat[$infochk{$symb}] = 'DONE ALREADY';
1316 if ( defined($entrychk{$symb}) ) {
1318 $c = $chk[$entrychk{$symb}];
1320 # If this is an entry point with an info table,
1321 # eliminate the entry symbol and all directives involving it.
1322 if (defined($infochk{$symb}) && $TargetPlatform !~ /^ia64-/) {
1324 foreach $l (split(/\n/,$c)) {
1325 next if $l =~ /^.*$symb_(entry|ret)${T_POST_LBL}/;
1327 # If we have .type/.size direrctives involving foo_entry,
1328 # then make them refer to foo_info instead. The information
1329 # in these directives is used by the cachegrind annotator,
1330 # so it is worthwhile keeping.
1331 if ($l =~ /^\s*\.(type|size).*$symb_(entry|ret)/) {
1332 $l =~ s/$symb(_entry|_ret)/${symb}_info/g;
1336 next if $l =~ /^\s*\..*$symb.*\n?/;
1339 $c = join("\n",@o) . "\n";
1342 print OUTASM $T_HDR_entry;
1344 &print_doctored($c, 1); # NB: the 1!!!
1346 $chkcat[$entrychk{$symb}] = 'DONE ALREADY';
1349 } elsif ( $chkcat[$i] eq 'vector' ) {
1350 $symb = $chksymb[$i];
1353 if ( defined($vectorchk{$symb}) ) {
1354 print OUTASM $T_HDR_vector;
1355 print OUTASM &rev_tbl($symb, $chk[$vectorchk{$symb}], 0);
1357 # direct return code will be put here!
1358 $chkcat[$vectorchk{$symb}] = 'DONE ALREADY';
1360 } elsif ( $TargetPlatform =~ /^alpha-/ ) {
1361 # Alphas: the commented nop is for the splitter, to ensure
1362 # that no module ends with a label as the very last
1363 # thing. (The linker will adjust the label to point
1364 # to the first code word of the next module linked in,
1365 # even if alignment constraints cause the label to move!)
1367 print OUTASM "\t# nop\n";
1370 } elsif ( $chkcat[$i] eq 'rodata' ) {
1371 print OUTASM $T_HDR_rodata;
1372 print OUTASM $chk[$i];
1373 $chkcat[$i] = 'DONE ALREADY';
1374 } elsif ( $chkcat[$i] eq 'relrodata' ) {
1375 print OUTASM $T_HDR_relrodata;
1376 print OUTASM $chk[$i];
1377 $chkcat[$i] = 'DONE ALREADY';
1378 } elsif ( $chkcat[$i] eq 'toc' ) {
1379 # silly optimisation to print tocs, since they come in groups...
1380 print OUTASM $T_HDR_toc;
1382 while ($chkcat[$j] eq 'toc')
1383 { if ( $chk[$j] !~ /\.tc UpdatePAP\[TC\]/ # not needed: always turned into a jump.
1386 print OUTASM $chk[$j];
1388 $chkcat[$j] = 'DONE ALREADY';
1392 } elsif ( $TargetPlatform =~ /^.*-apple-darwin.*/ && $chkcat[$i] eq 'dyld' ) {
1393 # apple-darwin: dynamic linker stubs
1394 if($chk[$i] !~ /\.indirect_symbol ___DISCARD__/)
1395 { # print them out unchanged, but remove the stubs for __DISCARD__
1396 print OUTASM $chk[$i];
1398 } elsif ( $TargetPlatform =~ /^i386-apple-darwin.*/ && $chkcat[$i] eq 'get_pc_thunk' ) {
1399 # i386-apple-darwin: __i686.get_pc_thunk.[abcd]x
1400 print OUTASM ".section __TEXT,__textcoal_nt,coalesced,no_toc\n";
1401 print OUTASM $chk[$i];
1403 &tidy_up_and_die(1,"$Pgm: unknown chkcat (ghc-asm: $TargetPlatform)\n$chkcat[$i]\n$chk[$i]\n");
1407 print OUTASM $EXTERN_DECLS if $TargetPlatform =~ /^mips-/;
1410 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1411 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1416 sub hppa_mash_prologue { # OK, epilogue, too
1419 # toss all prologue stuff
1420 s/^\s+\.ENTRY[^\0]*--- BEGIN ---/\t.ENTRY/;
1422 # Lie about our .CALLINFO
1423 s/^\s+\.CALLINFO.*$/\t.CALLINFO NO_CALLS,NO_UNWIND/;
1430 # toss all epilogue stuff
1431 s/^\s+--- END ---[^\0]*\.EXIT/\t.EXIT/;
1433 # Sorry; we moved the _info stuff to the code segment.
1434 s/_info,DATA/_info,CODE/g;
1441 sub print_doctored {
1442 local($_, $need_fallthru_patch) = @_;
1444 if ( $TargetPlatform =~ /^x86_64-/ ) {
1447 # movq -4(%ebp), %rax
1452 s/^\tmovq\s+(-?\d*\(\%r(bx|bp|13)\)),\s*(\%r(ax|cx|dx|10|11))\n\tjmp\s+\*\3/\tjmp\t\*$1/g;
1453 s/^\tmovl\s+\$${T_US}(.*),\s*(\%e(ax|cx|si|di))\n\tjmp\s+\*\%r\3/\tjmp\t$T_US$1/g;
1456 if ( $TargetPlatform !~ /^i386-/
1457 || ! /^\t[a-z]/ # no instructions in here, apparently
1458 || /^${T_US}__stginit_[A-Za-z0-9_]+${T_POST_LBL}/) {
1463 # OK, must do some x86 **HACKING**
1465 local($entry_patch) = '';
1466 local($exit_patch) = '';
1468 # gotta watch out for weird instructions that
1469 # invisibly smash various regs:
1470 # rep* %ecx used for counting
1471 # scas* %edi used for destination index
1472 # cmps* %e[sd]i used for indices
1473 # loop* %ecx used for counting
1478 # * use of STG reg [ nn(%ebx) ] where no machine reg avail
1480 # * GCC used an "STG reg" for its own purposes
1482 # * some secret uses of machine reg, requiring STG reg
1483 # to be saved/restored
1485 # The most dangerous "GCC uses" of an "STG reg" are when
1486 # the reg holds the target of a jmp -- it's tricky to
1487 # insert the patch-up code before we get to the target!
1488 # So here we change the jmps:
1490 # --------------------------------------------------------
1491 # it can happen that we have jumps of the form...
1492 # jmp *<something involving %esp>
1494 # jmp <something involving another naughty register...>
1496 # a reasonably-common case is:
1498 # movl $_blah,<bad-reg>
1501 s/^\tmovl\s+\$${T_US}(.*),\s*(\%e[acd]x)\n\tjmp\s+\*\2/\tjmp $T_US$1/g;
1505 # movl -4(%ebx), %eax
1510 s/^\tmovl\s+(-?\d*\(\%e(bx|si)\)),\s*(\%e[acd]x)\n\tjmp\s+\*\3/\tjmp\t\*$1/g;
1512 if ($StolenX86Regs <= 2 ) { # YURGH! spurious uses of esi?
1513 s/^\tmovl\s+(.*),\s*\%esi\n\tjmp\s+\*%esi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1514 s/^\tjmp\s+\*(.*\(.*\%esi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1515 s/^\tjmp\s+\*\%esi\n/\tmovl \%esi,\%eax\n\tjmp \*\%eax\n/g;
1516 die "$Pgm: (mangler) still have jump involving \%esi!\n$_"
1517 if /(jmp|call)\s+.*\%esi/;
1519 if ($StolenX86Regs <= 3 ) { # spurious uses of edi?
1520 s/^\tmovl\s+(.*),\s*\%edi\n\tjmp\s+\*%edi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1521 s/^\tjmp\s+\*(.*\(.*\%edi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1522 s/^\tjmp\s+\*\%edi\n/\tmovl \%edi,\%eax\n\tjmp \*\%eax\n/g;
1523 die "$Pgm: (mangler) still have jump involving \%edi!\n$_"
1524 if /(jmp|call)\s+.*\%edi/;
1527 # OK, now we can decide what our patch-up code is going to
1530 # Offsets into register table - you'd better update these magic
1531 # numbers should you change its contents!
1532 # local($OFFSET_R1)=0; No offset for R1 in new RTS.
1533 local($OFFSET_Hp)=88;
1535 # Note funky ".=" stuff; we're *adding* to these _patch guys
1536 if ( $StolenX86Regs <= 2
1537 && ( /[^0-9]\(\%ebx\)/ || /\%esi/ || /^\tcmps/ ) ) { # R1 (esi)
1538 $entry_patch .= "\tmovl \%esi,(\%ebx)\n";
1539 $exit_patch .= "\tmovl (\%ebx),\%esi\n";
1541 # nothing for call_{entry,exit} because %esi is callee-save
1543 if ( $StolenX86Regs <= 3
1544 && ( /${OFFSET_Hp}\(\%ebx\)/ || /\%edi/ || /^\t(scas|cmps)/ ) ) { # Hp (edi)
1545 $entry_patch .= "\tmovl \%edi,${OFFSET_Hp}(\%ebx)\n";
1546 $exit_patch .= "\tmovl ${OFFSET_Hp}(\%ebx),\%edi\n";
1548 # nothing for call_{entry,exit} because %edi is callee-save
1551 # --------------------------------------------------------
1552 # next, here we go with non-%esp patching!
1554 s/^(\t[a-z])/$entry_patch$1/; # before first instruction
1556 # Before calling GC we must set up the exit condition before the call
1557 # and entry condition when we come back
1559 # fix _all_ non-local jumps:
1561 if ( $TargetPlatform =~ /^.*-apple-darwin.*/ ) {
1562 # On Darwin, we've got local-looking jumps that are
1563 # actually global (i.e. jumps to Lfoo$stub or via
1564 # Lfoo$non_lazy_ptr), so we fix those first.
1565 # In fact, we just fix everything that contains a dollar
1566 # because false positives don't hurt here.
1568 s/^(\tjmp\s+\*?L.*\$.*\n)/$exit_patch$1/g;
1571 s/^\tjmp\s+\*${T_X86_PRE_LLBL_PAT}/\tJMP___SL/go;
1572 s/^\tjmp\s+${T_X86_PRE_LLBL_PAT}/\tJMP___L/go;
1574 s/^(\tjmp\s+.*\n)/$exit_patch$1/g; # here's the fix...
1576 s/^\tJMP___SL/\tjmp \*${T_X86_PRE_LLBL}/go;
1577 s/^\tJMP___L/\tjmp ${T_X86_PRE_LLBL}/go;
1579 if ($StolenX86Regs == 2 ) {
1580 die "ARGH! Jump uses \%esi or \%edi with -monly-2-regs:\n$_"
1581 if /^\t(jmp|call)\s+.*\%e(si|di)/;
1582 } elsif ($StolenX86Regs == 3 ) {
1583 die "ARGH! Jump uses \%edi with -monly-3-regs:\n$_"
1584 if /^\t(jmp|call)\s+.*\%edi/;
1587 # --------------------------------------------------------
1588 # that's it -- print it
1590 #die "Funny jumps?\n$_" if /${T_X86_BADJMP}/o; # paranoia
1594 if ( $need_fallthru_patch ) { # exit patch for end of slow entry code
1595 print OUTASM $exit_patch;
1596 # ToDo: make it not print if there is a "jmp" at the end
1602 sub init_FUNNY_THINGS {
1603 %KNOWN_FUNNY_THING = (
1605 # "${T_US}stg_.*{T_POST_LBL}", 1,
1610 The following table reversal is used for both info tables and return
1611 vectors. In both cases, we remove the first entry from the table,
1612 reverse the table, put the label at the end, and paste some code
1613 (that which is normally referred to by the first entry in the table)
1614 right after the table itself. (The code pasting is done elsewhere.)
1618 local($symb, $tbl, $discard1) = @_;
1620 return ($tbl) if ($TargetPlatform =~ /^ia64-/);
1622 local($before) = '';
1624 local(@imports) = (); # hppa only
1627 local(@lines) = split(/\n/, $tbl);
1630 # Deal with the header...
1631 for ($i = 0; $i <= $#lines && $lines[$i] !~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1632 $label .= $lines[$i] . "\n",
1633 next if $lines[$i] =~ /^[A-Za-z0-9_]+_info${T_POST_LBL}$/o
1634 || $lines[$i] =~ /${T_DOT_GLOBAL}/o
1635 || $lines[$i] =~ /^${T_US}\S+_vtbl${T_POST_LBL}$/o;
1637 $before .= $lines[$i] . "\n"; # otherwise...
1641 $infoname =~ s/(.|\n)*^([A-Za-z0-9_]+_info)${T_POST_LBL}$(.|\n)*/\2/;
1643 # Grab the table data...
1644 if ( $TargetPlatform !~ /^hppa/ ) {
1645 for ( ; $i <= $#lines && $lines[$i] =~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1647 # Convert addresses of SRTs, slow entrypoints and large bitmaps
1648 # to offsets (relative to the info label),
1649 # in order to support position independent code.
1650 $line =~ s/$infoname/0/
1651 || $line =~ s/([A-Za-z0-9_]+_srtd)$/\1 - $infoname/
1652 || $line =~ s/([A-Za-z0-9_]+_srt(\+\d+)?)$/\1 - $infoname/
1653 || $line =~ s/([A-Za-z0-9_]+_slow)$/\1 - $infoname/
1654 || $line =~ s/([A-Za-z0-9_]+_btm)$/\1 - $infoname/
1655 || $line =~ s/([A-Za-z0-9_]+_alt)$/\1 - $infoname/
1656 || $line =~ s/([A-Za-z0-9_]+_dflt)$/\1 - $infoname/
1657 || $line =~ s/([A-Za-z0-9_]+_ret)$/\1 - $infoname/;
1658 push(@words, $line);
1660 } else { # hppa weirdness
1661 for ( ; $i <= $#lines && $lines[$i] =~ /^\s+(${T_DOT_WORD}|\.IMPORT)/; $i++) {
1662 # FIXME: the RTS now expects offsets instead of addresses
1663 # for all labels in info tables.
1664 if ($lines[$i] =~ /^\s+\.IMPORT/) {
1665 push(@imports, $lines[$i]);
1667 # We don't use HP's ``function pointers''
1668 # We just use labels in code space, like normal people
1669 $lines[$i] =~ s/P%//;
1670 push(@words, $lines[$i]);
1675 # Now throw away any initial zero word from the table. This is a hack
1676 # that lets us reduce the size of info tables when the SRT field is not
1677 # needed: see comments StgFunInfoTable in InfoTables.h.
1679 # The .zero business is for Linux/ELF.
1680 # The .skip business is for Sparc/Solaris/ELF.
1681 # The .blockz business is for HPPA.
1683 # if ($words[0] =~ /^\t?(${T_DOT_WORD}\s+0|\.zero\s+4|\.skip\s+4|\.blockz\s+4)/) {
1688 for (; $i <= $#lines; $i++) {
1689 $after .= $lines[$i] . "\n";
1692 # Alphas: If we have anonymous text (not part of a procedure), the
1693 # linker may complain about missing exception information. Bleh.
1694 # To suppress this, we place a .ent/.end pair around the code.
1695 # At the same time, we have to be careful and not enclose any leading
1696 # .file/.loc directives.
1697 if ( $TargetPlatform =~ /^alpha-/ && $label =~ /^([A-Za-z0-9_]+):$/) {
1698 local ($ident) = $1;
1699 $before =~ s/^((\s*\.(file|loc)\s+[^\n]*\n)*)/$1\t.ent $ident\n/;
1700 $after .= "\t.end $ident\n";
1703 # Alphas: The heroic Simon Marlow found a bug in the Digital UNIX
1704 # assembler (!) wherein .quad constants inside .text sections are
1705 # first narrowed to 32 bits then sign-extended back to 64 bits.
1706 # This obviously screws up our 64-bit bitmaps, so we work around
1707 # the bug by replacing .quad with .align 3 + .long + .long [ccshan]
1708 if ( $TargetPlatform =~ /^alpha-/ ) {
1710 if (/^\s*\.quad\s+([-+0-9].*\S)\s*$/ && length $1 >= 10) {
1711 local ($number) = $1;
1712 if ($number =~ /^([-+])?(0x?)?([0-9]+)$/) {
1713 local ($sign, $base, $digits) = ($1, $2, $3);
1714 $base = (10, 8, 16)[length $base];
1715 local ($hi, $lo) = (0, 0);
1716 foreach $i (split(//, $digits)) {
1717 $j = $lo * $base + $i;
1718 $lo = $j % 4294967296;
1719 $hi = $hi * $base + ($j - $lo) / 4294967296;
1721 ($hi, $lo) = (4294967295 - $hi, 4294967296 - $lo)
1723 $_ = "\t.align 3\n\t.long $lo\n\t.long $hi\n";
1724 # printf STDERR "TURNING %s into 0x %08x %08x\n", $number, $hi, $lo;
1726 print STDERR "Cannot handle \".quad $number\" in info table\n";
1734 . (($TargetPlatform !~ /^hppa/) ? '' : join("\n", @imports) . "\n")
1735 . join("\n", @words) . "\n"
1738 # print STDERR "before=$before\n";
1739 # print STDERR "label=$label\n";
1740 # print STDERR "words=",(reverse @words),"\n";
1741 # print STDERR "after=$after\n";
1747 The HP is a major nuisance. The threaded code mangler moved info
1748 tables from data space to code space, but unthreaded code in the RTS
1749 still has references to info tables in data space. Since the HP
1750 linker is very precise about where symbols live, we need to patch the
1751 references in the unthreaded RTS as well.
1754 sub mini_mangle_asm_hppa {
1755 local($in_asmf, $out_asmf) = @_;
1757 open(INASM, "< $in_asmf")
1758 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
1759 open(OUTASM,"> $out_asmf")
1760 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
1763 s/_info,DATA/_info,CODE/; # Move _info references to code space
1769 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1770 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1776 sub tidy_up_and_die {
1777 local($return_val, $msg) = @_;
1779 exit (($return_val == 0) ? 0 : 1);