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';
598 } elsif ( $TargetPlatform =~ /^.*-apple-darwin.*/ && $chkcat[$i] eq 'dyld' && /^\s*\.data/)
599 { # non_lazy_symbol_ptrs that point to local symbols
601 $chkcat[$i] = 'dyld';
604 } elsif ( /^\s+/ ) { # most common case first -- a simple line!
605 # duplicated from the bottom
609 } elsif ( /\.\.ng:$/ && $TargetPlatform =~ /^alpha-/ ) {
610 # Alphas: Local labels not to be confused with new chunks
612 # NB: all the rest start with a non-space
614 } elsif ( $TargetPlatform =~ /^mips-/
615 && /^\d+:/ ) { # a funny-looking very-local label
618 } elsif ( /$T_CONST_LBL/o ) {
620 $chkcat[$i] = 'literal';
623 } elsif ( /^${T_US}__stg_split_marker(\d*)${T_POST_LBL}$/o ) {
625 $chkcat[$i] = 'splitmarker';
628 } elsif ( /^${T_US}([A-Za-z0-9_]+)_info${T_POST_LBL}$/o ) {
631 $chkcat[$i] = 'infotbl';
632 $chksymb[$i] = $symb;
634 die "Info table already? $symb; $i\n" if defined($infochk{$symb});
636 $infochk{$symb} = $i;
638 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(entry|ret)${T_POST_LBL}$/o ) {
640 $chkcat[$i] = 'entry';
645 } elsif ( /^${T_US}([A-Za-z0-9_]+)_closure${T_POST_LBL}$/o ) {
647 $chkcat[$i] = 'closure';
650 $closurechk{$1} = $i;
652 } elsif ( /^${T_US}([A-Za-z0-9_]+)_srt${T_POST_LBL}$/o ) {
659 } elsif ( /^${T_US}([A-Za-z0-9_]+)_ct${T_POST_LBL}$/o ) {
661 $chkcat[$i] = 'data';
664 } elsif ( /^${T_US}(stg_ap_stack_entries|stg_stack_save_entries|stg_arg_bitmaps)${T_POST_LBL}$/o ) {
666 $chkcat[$i] = 'data';
669 } elsif ( /^(${T_US}__gnu_compiled_c|gcc2_compiled\.)${T_POST_LBL}/o ) {
672 } elsif ( /^${T_US}[A-Za-z0-9_]+\.\d+${T_POST_LBL}$/o
673 || /^${T_US}.*_CAT${T_POST_LBL}$/o # PROF: _entryname_CAT
674 || /^${T_US}.*_done${T_POST_LBL}$/o # PROF: _module_done
675 || /^${T_US}_module_registered${T_POST_LBL}$/o # PROF: _module_registered
678 $chkcat[$i] = 'data';
681 } elsif ( /^([A-Za-z0-9_]+)\s+\.comm/ && $TargetPlatform =~ /^hppa/ ) {
686 } elsif ( /^${T_US}([A-Za-z0-9_]+)_cc(s)?${T_POST_LBL}$/o ) {
687 # all CC_ symbols go in the data section...
689 $chkcat[$i] = 'data';
692 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(alt|dflt)${T_POST_LBL}$/o ) {
694 $chkcat[$i] = 'misc';
696 } elsif ( /^${T_US}([A-Za-z0-9_]+)_vtbl${T_POST_LBL}$/o ) {
698 $chkcat[$i] = 'vector';
703 } elsif ( $TargetPlatform =~ /^i386-.*-solaris2/
704 && /^[A-Za-z0-9][A-Za-z0-9_]*:/ ) {
705 # Some Solaris system headers contain function definitions (as
706 # opposed to mere prototypes), which end up in the .hc file when
707 # a Haskell module foreign imports the corresponding system
708 # functions (most notably stat()). We put them into the text
709 # segment. Note that this currently does not extend to function
710 # names starting with an underscore.
713 $chkcat[$i] = 'misc';
716 } elsif ( $TargetPlatform =~ /^i386-apple-darwin/ && /^(___i686\.get_pc_thunk\.[abcd]x):/o) {
717 # To handle PIC on Darwin/x86, we need to appropriately pass through
718 # the get_pc_thunk functions. The need to be put into a special section
719 # marked as coalesced (otherwise the .weak_definition doesn't work
722 $chkcat[$i] = 'get_pc_thunk';
725 } elsif ( /^${T_US}[A-Za-z0-9_]/o
726 && ( $TargetPlatform !~ /^hppa/ # need to avoid local labels in this case
728 && ( $TargetPlatform !~ /^powerpc64/ # we need to avoid local labels in this case
729 || ! /^\.L\d+:$/ ) ) {
736 /^${T_US}stg_.*${T_POST_LBL}$/o # RTS internals
737 || /^${T_US}__stg_.*${T_POST_LBL}$/o # more RTS internals
738 || /^${T_US}__fexp_.*${T_POST_LBL}$/o # foreign export
739 || /^${T_US}.*_slow${T_POST_LBL}$/o # slow entry
740 || /^${T_US}__stginit.*${T_POST_LBL}$/o # __stginit<module>
741 || /^${T_US}.*_btm${T_POST_LBL}$/o # large bitmaps
742 || /^${T_US}.*_fast${T_POST_LBL}$/o # primops
743 || /^_uname:/o # x86/Solaris2
746 $chkcat[$i] = 'misc';
748 /^${T_US}.*_srtd${T_POST_LBL}$/o # large bitmaps
749 || /^${T_US}.*_closure_tbl${T_POST_LBL}$/o # closure tables
752 $chkcat[$i] = 'relrodata';
755 print STDERR "Warning: retaining unknown function \`$thing' in output from C compiler\n";
756 $chkcat[$i] = 'unknown';
759 } elsif ( $TargetPlatform =~ /^powerpc-.*-linux/ && /^\.LCTOC1 = /o ) {
760 # PowerPC Linux's large-model PIC (-fPIC) generates a gobal offset
761 # table "by hand". Be sure to copy it over.
762 # Note that this label and all entries in the table should actually
763 # go into the .got2 section, but it isn't easy to distinguish them
764 # from other constant literals (.LC\d+), so we just put everything
767 $chkcat[$i] = 'literal';
768 $chksymb[$i] = 'LCTOC1';
769 } else { # simple line (duplicated at the top)
774 $numchks = $#chk + 1;
776 # open CHUNKS, ">/tmp/chunks1" or die "Cannot open /tmp/chunks1: $!\n";
777 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
780 # the division into chunks is imperfect;
781 # we throw some things over the fence into the next
784 # also, there are things we would like to know
785 # about the whole module before we start spitting
788 local($FIRST_MANGLABLE) = ($TargetPlatform =~ /^(alpha-|hppa|mips-)/) ? 1 : 0;
789 local($FIRST_TOSSABLE ) = ($TargetPlatform =~ /^(hppa|mips-)/) ? 1 : 0;
791 # print STDERR "first chunk to mangle: $FIRST_MANGLABLE\n";
793 # Alphas: NB: we start meddling at chunk 1, not chunk 0
794 # The first ".rdata" is quite magical; as of GCC 2.7.x, it
795 # spits a ".quad 0" in after the very first ".rdata"; we
796 # detect this special case (tossing the ".quad 0")!
797 local($magic_rdata_seen) = 0;
799 # HPPAs, MIPSen: also start medding at chunk 1
801 for ($i = $FIRST_TOSSABLE; $i < $numchks; $i++) {
802 $c = $chk[$i]; # convenience copy
804 # print STDERR "\nCHK $i (BEFORE) (",$chkcat[$i],"):\n", $c;
806 # toss all prologue stuff; HPPA is pretty weird
808 $c = &hppa_mash_prologue($c) if $TargetPlatform =~ /^hppa-/;
810 # be slightly paranoid to make sure there's
811 # nothing surprising in there
812 if ( $c =~ /--- BEGIN ---/ ) {
813 if (($p, $r) = split(/--- BEGIN ---/, $c)) {
815 # remove junk whitespace around the split point
819 if ($TargetPlatform =~ /^i386-/) {
820 if ($p =~ /^\tsubl\s+\$(\d+),\s*\%esp\n/) {
822 die "Error: reserved stack space exceeded!\n Possible workarounds: compile with -fasm, or try another version of gcc.\n"
826 # gcc 3.4.3 puts this kind of stuff in the prologue, eg.
827 # when compiling PrimOps.cmm with -optc-O2:
830 # movl %ecx, 16(%esp)
831 # movl %edx, 20(%esp)
832 # but then the code of the function doesn't assume
833 # anything about the contnets of these stack locations.
834 # I think it's to do with the use of inline functions for
835 # PK_Word64() and friends, where gcc is initialising the
836 # contents of the struct to zero, and failing to optimise
837 # away the initialisation. Let's live dangerously and
838 # discard these initalisations.
840 $p =~ s/^\tpushl\s+\%e(di|si|bx)\n//g;
841 $p =~ s/^\txorl\s+\%e(ax|cx|dx),\s*\%e(ax|cx|dx)\n//g;
842 $p =~ s/^\tmovl\s+\%e(ax|cx|dx|si|di),\s*\d*\(\%esp\)\n//g;
843 $p =~ s/^\tmovl\s+\$\d+,\s*\d*\(\%esp\)\n//g;
844 $p =~ s/^\tsubl\s+\$\d+,\s*\%esp\n//;
845 $p =~ s/^\tmovl\s+\$\d+,\s*\%eax\n\tcall\s+__alloca\n// if ($TargetPlatform =~ /^.*-(cygwin32|mingw32)/);
847 if ($TargetPlatform =~ /^i386-apple-darwin/) {
849 $pcrel_label =~ s/(.|\n)*^(\"?L\d+\$pb\"?):\n(.|\n)*/$2/ or $pcrel_label = "";
851 $pcrel_reg =~ s/(.|\n)*.*___i686\.get_pc_thunk\.([abcd]x)\n(.|\n)*/$2/ or $pcrel_reg = "";
852 $p =~ s/^\s+call\s+___i686\.get_pc_thunk\..x//;
853 $p =~ s/^\"?L\d+\$pb\"?:\n//;
855 if ($pcrel_reg eq "bx") {
856 # Bad gcc. Goes and uses %ebx, our BaseReg, for PIC. Bad gcc.
857 die "Darwin/x86: -fPIC -via-C doesn't work yet, use -fasm. Aborting."
861 } elsif ($TargetPlatform =~ /^x86_64-/) {
862 $p =~ s/^\tpushq\s+\%r(bx|bp|12|13|14)\n//g;
863 $p =~ s/^\tmovq\s+\%r(bx|bp|12|13|14),\s*\d*\(\%rsp\)\n//g;
864 $p =~ s/^\tsubq\s+\$\d+,\s*\%rsp\n//;
866 } elsif ($TargetPlatform =~ /^ia64-/) {
867 $p =~ s/^\t\.prologue .*\n//;
868 $p =~ s/^\t\.save ar\.pfs, r\d+\n\talloc r\d+ = ar\.pfs, 0, 3[12], \d+, 0\n//;
869 $p =~ s/^\t\.fframe \d+\n\tadds r12 = -\d+, r12\n//;
870 $p =~ s/^\t\.save rp, r\d+\n\tmov r\d+ = b0\n//;
871 $p =~ s/^\t\.(mii|mmi)\n//g; # bundling is no longer sensible
872 $p =~ s/^\t;;\n//g; # discard stops
873 $p =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
875 # GCC 3.3 saves r1 in the prologue, move this to the body
876 if ($p =~ /^\tmov r\d+ = r1\n/) {
880 } elsif ($TargetPlatform =~ /^m68k-/) {
881 $p =~ s/^\tlink a6,#-?\d.*\n//;
882 $p =~ s/^\tpea a6@\n\tmovel sp,a6\n//;
883 # The above showed up in the asm code,
884 # so I added it here.
885 # I hope it's correct.
887 $p =~ s/^\tmovel d2,sp\@-\n//;
888 $p =~ s/^\tmovel d5,sp\@-\n//; # SMmark.* only?
889 $p =~ s/^\tmoveml \#0x[0-9a-f]+,sp\@-\n//; # SMmark.* only?
890 } elsif ($TargetPlatform =~ /^mips-/) {
891 # the .frame/.mask/.fmask that we use is the same
892 # as that produced by GCC for miniInterpret; this
893 # gives GDB some chance of figuring out what happened
894 $FRAME = "\t.frame\t\$sp,2168,\$31\n\t.mask\t0x90000000,-4\n\t.fmask\t0x00000000,0\n";
895 $p =~ s/^\t\.(frame).*\n/__FRAME__/g;
896 $p =~ s/^\t\.(mask|fmask).*\n//g;
897 $p =~ s/^\t\.cprestore.*\n/\t\.cprestore 416\n/; # 16 + 100 4-byte args
898 $p =~ s/^\tsubu\t\$sp,\$sp,\d+\n//;
899 $p =~ s/^\tsw\t\$31,\d+\(\$sp\)\n//;
900 $p =~ s/^\tsw\t\$fp,\d+\(\$sp\)\n//;
901 $p =~ s/^\tsw\t\$28,\d+\(\$sp\)\n//;
902 $p =~ s/__FRAME__/$FRAME/;
903 } elsif ($TargetPlatform =~ /^powerpc-apple-darwin.*/) {
905 $pcrel_label =~ s/(.|\n)*^(\"?L\d+\$pb\"?):\n(.|\n)*/$2/ or $pcrel_label = "";
907 $p =~ s/^\tmflr r0\n//;
908 $p =~ s/^\tbl saveFP # f\d+\n//;
909 $p =~ s/^\tbl saveFP ; save f\d+-f\d+\n//;
910 $p =~ s/^\"?L\d+\$pb\"?:\n//;
911 $p =~ s/^\tstmw r\d+,-\d+\(r1\)\n//;
912 $p =~ s/^\tstfd f\d+,-\d+\(r1\)\n//g;
913 $p =~ s/^\tstw r0,\d+\(r1\)\n//g;
914 $p =~ s/^\tstwu r1,-\d+\(r1\)\n//;
915 $p =~ s/^\tstw r\d+,-\d+\(r1\)\n//g;
916 $p =~ s/^\tbcl 20,31,L\d+\$pb\n//;
917 $p =~ s/^L\d+\$pb:\n//;
918 $p =~ s/^\tmflr r31\n//;
920 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
921 # under some circumstances, only when generating position dependent code.
922 # I have no idea why, and I don't think it is necessary, so let's toss it.
923 $p =~ s/^\tli r\d+,0\n//g;
924 $p =~ s/^\tstw r\d+,\d+\(r1\)\n//g;
925 } elsif ($TargetPlatform =~ /^powerpc-.*-linux/) {
926 $p =~ s/^\tmflr 0\n//;
927 $p =~ s/^\tstmw \d+,\d+\(1\)\n//;
928 $p =~ s/^\tstfd \d+,\d+\(1\)\n//g;
929 $p =~ s/^\tstw r0,8\(1\)\n//;
930 $p =~ s/^\tstwu 1,-\d+\(1\)\n//;
931 $p =~ s/^\tstw \d+,\d+\(1\)\n//g;
933 # GCC's "large-model" PIC (-fPIC)
935 $pcrel_label =~ s/(.|\n)*^.LCF(\d+):\n(.|\n)*/$2/ or $pcrel_label = "";
937 $p =~ s/^\tbcl 20,31,.LCF\d+\n//;
938 $p =~ s/^.LCF\d+:\n//;
939 $p =~ s/^\tmflr 30\n//;
940 $p =~ s/^\tlwz 0,\.LCL\d+-\.LCF\d+\(30\)\n//;
941 $p =~ s/^\tadd 30,0,30\n//;
943 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
944 # under some circumstances, only when generating position dependent code.
945 # I have no idea why, and I don't think it is necessary, so let's toss it.
946 $p =~ s/^\tli \d+,0\n//g;
947 $p =~ s/^\tstw \d+,\d+\(1\)\n//g;
948 } elsif ($TargetPlatform =~ /^powerpc64-.*-linux/) {
949 $p =~ s/^\tmr 31,1\n//;
950 $p =~ s/^\tmflr 0\n//;
951 $p =~ s/^\tstmw \d+,\d+\(1\)\n//;
952 $p =~ s/^\tstfd \d+,-?\d+\(1\)\n//g;
953 $p =~ s/^\tstd r0,8\(1\)\n//;
954 $p =~ s/^\tstdu 1,-\d+\(1\)\n//;
955 $p =~ s/^\tstd \d+,-?\d+\(1\)\n//g;
957 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
958 # under some circumstances, only when generating position dependent code.
959 # I have no idea why, and I don't think it is necessary, so let's toss it.
960 $p =~ s/^\tli \d+,0\n//g;
961 $p =~ s/^\tstd \d+,\d+\(1\)\n//g;
963 print STDERR "$Pgm: unknown prologue mangling? $TargetPlatform\n";
966 # HWL HACK: dont die, just print a warning
967 #print stderr "HWL: this should die! Prologue junk?: $p\n" if $p =~ /^\t[^\.]/;
968 die "Prologue junk?: $p\n" if $p =~ /^\s+[^\s\.]/;
970 # For PIC, we want to keep part of the prologue
971 if ($TargetPlatform =~ /^powerpc-apple-darwin.*/ && $pcrel_label ne "") {
972 # Darwin: load the current instruction pointer into register r31
973 $p .= "bcl 20,31,$pcrel_label\n";
974 $p .= "$pcrel_label:\n";
975 $p .= "\tmflr r31\n";
976 } elsif ($TargetPlatform =~ /^powerpc-.*-linux/ && $pcrel_label ne "") {
977 # Linux: load the GOT pointer into register 30
978 $p .= "\tbcl 20,31,.LCF$pcrel_label\n";
979 $p .= ".LCF$pcrel_label:\n";
981 $p .= "\tlwz 0,.LCL$pcrel_label-.LCF$pcrel_label(30)\n";
982 $p .= "\tadd 30,0,30\n";
983 } elsif ($TargetPlatform =~ /^i386-apple-darwin.*/ && $pcrel_label ne "") {
984 $p .= "\tcall ___i686.get_pc_thunk.$pcrel_reg\n";
985 $p .= "$pcrel_label:\n";
988 # glue together what's left
993 if ( $TargetPlatform =~ /^mips-/ ) {
994 # MIPS: first, this basic sequence may occur "--- END ---" or not
995 $c =~ s/^\tlw\t\$31,\d+\(\$sp\)\n\taddu\t\$sp,\$sp,\d+\n\tj\t\$31\n\t\.end/\t\.end/;
998 # toss all epilogue stuff; again, paranoidly
999 if ( $c =~ /--- END ---/ ) {
1000 if (($r, $e) = split(/--- END ---/, $c)) {
1001 if ($TargetPlatform =~ /^i386-/) {
1003 $e =~ s/^\tpopl\s+\%edi\n//;
1004 $e =~ s/^\tpopl\s+\%esi\n//;
1005 $e =~ s/^\tpopl\s+\%edx\n//;
1006 $e =~ s/^\tpopl\s+\%ecx\n//;
1007 $e =~ s/^\taddl\s+\$\d+,\s*\%esp\n//;
1008 $e =~ s/^\tsubl\s+\$-\d+,\s*\%esp\n//;
1009 } elsif ($TargetPlatform =~ /^ia64-/) {
1010 $e =~ s/^\tmov ar\.pfs = r\d+\n//;
1011 $e =~ s/^\tmov b0 = r\d+\n//;
1012 $e =~ s/^\t\.restore sp\n\tadds r12 = \d+, r12\n//;
1013 $e =~ s/^\tbr\.ret\.sptk\.many b0\n//;
1014 $e =~ s/^\t\.(mii|mmi|mib)\n//g; # bundling is no longer sensible
1015 $e =~ s/^\t;;\n//g; # discard stops - stop at end of body is sufficient
1016 $e =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
1017 } elsif ($TargetPlatform =~ /^m68k-/) {
1018 $e =~ s/^\tunlk a6\n//;
1020 } elsif ($TargetPlatform =~ /^mips-/) {
1021 $e =~ s/^\tlw\t\$31,\d+\(\$sp\)\n//;
1022 $e =~ s/^\tlw\t\$fp,\d+\(\$sp\)\n//;
1023 $e =~ s/^\taddu\t\$sp,\$sp,\d+\n//;
1024 $e =~ s/^\tj\t\$31\n//;
1025 } elsif ($TargetPlatform =~ /^powerpc-apple-darwin.*/) {
1026 $e =~ s/^\taddi r1,r1,\d+\n//;
1027 $e =~ s/^\tlwz r\d+,\d+\(r1\)\n//;
1028 $e =~ s/^\tlmw r\d+,-\d+\(r1\)\n//;
1029 $e =~ s/^\tmtlr r0\n//;
1031 $e =~ s/^\tb restFP ;.*\n//;
1032 } elsif ($TargetPlatform =~ /^powerpc64-.*-linux/) {
1033 $e =~ s/^\tmr 3,0\n//;
1034 $e =~ s/^\taddi 1,1,\d+\n//;
1035 $e =~ s/^\tld 0,16\(1\)\n//;
1036 $e =~ s/^\tmtlr 0\n//;
1038 # callee-save registers
1039 $e =~ s/^\tld \d+,-?\d+\(1\)\n//g;
1040 $e =~ s/^\tlfd \d+,-?\d+\(1\)\n//g;
1042 # get rid of the debug junk along with the blr
1043 $e =~ s/^\tblr\n\t.long .*\n\t.byte .*\n//;
1045 # incase we missed it with the last one get the blr alone
1048 print STDERR "$Pgm: unknown epilogue mangling? $TargetPlatform\n";
1051 print STDERR "WARNING: Epilogue junk?: $e\n" if $e =~ /^\t\s*[^\.\s\n]/;
1053 # glue together what's left
1055 $c =~ s/\n\t\n/\n/; # junk blank line
1059 # On SPARCs, we don't do --- BEGIN/END ---, we just
1060 # toss the register-windowing save/restore/ret* instructions
1061 # directly unless they've been generated by function definitions in header
1063 if ( $TargetPlatform =~ /^sparc-/ ) {
1064 if ( ! ( $TargetPlatform =~ /solaris2$/ && $chkcat[$i] eq 'unknown' )) {
1065 $c =~ s/^\t(save.*|restore.*|ret|retl)\n//g;
1067 # throw away PROLOGUE comments
1068 $c =~ s/^\t!#PROLOGUE# 0\n\t!#PROLOGUE# 1\n//;
1071 # On Alphas, the prologue mangling is done a little later (below)
1073 # toss all calls to __DISCARD__
1074 $c =~ s/^\t(call|jbsr|jal)\s+${T_US}__DISCARD__\n//go;
1075 $c =~ s/^\tjsr\s+\$26\s*,\s*${T_US}__DISCARD__\n//go if $TargetPlatform =~ /^alpha-/;
1076 $c =~ s/^\tbl\s+L___DISCARD__\$stub\n//go if $TargetPlatform =~ /^powerpc-apple-darwin.*/;
1077 $c =~ s/^\tbl\s+__DISCARD__(\@plt)?\n//go if $TargetPlatform =~ /^powerpc-.*-linux/;
1078 $c =~ s/^\tbl\s+\.__DISCARD__\n\s+nop\n//go if $TargetPlatform =~ /^powerpc64-.*-linux/;
1079 $c =~ s/^\tcall\s+L___DISCARD__\$stub\n//go if $TargetPlatform =~ /i386-apple-darwin.*/;
1081 # IA64: mangle tailcalls into jumps here
1082 if ($TargetPlatform =~ /^ia64-/) {
1083 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/) {
1084 # Eek, the gcc optimiser is getting smarter... if we see a jump to the --- TAILCALL ---
1085 # marker then we reapply the substitution at the source sites
1086 $c =~ s/^\tbr \.L$2\n/\t--- TAILCALL ---\n/g if ($2);
1090 # MIPS: that may leave some gratuitous asm macros around
1091 # (no harm done; but we get rid of them to be tidier)
1092 $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/
1093 if $TargetPlatform =~ /^mips-/;
1095 # toss stack adjustment after DoSparks
1096 $c =~ s/^(\tjbsr _DoSparks\n)\taddqw #8,sp/$1/g
1097 if $TargetPlatform =~ /^m68k-/; # this looks old...
1099 if ( $TargetPlatform =~ /^alpha-/ &&
1100 ! $magic_rdata_seen &&
1101 $c =~ /^\s*\.rdata\n\t\.quad 0\n\t\.align \d\n/ ) {
1102 $c =~ s/^\s*\.rdata\n\t\.quad 0\n\t\.align (\d)\n/\.rdata\n\t\.align $1\n/;
1103 $magic_rdata_seen = 1;
1106 # pick some end-things and move them to the next chunk
1108 # pin a funny end-thing on (for easier matching):
1109 $c .= 'FUNNY#END#THING';
1111 while ( $c =~ /${T_MOVE_DIRVS}FUNNY#END#THING/o ) {
1115 # on x86 we try not to copy any directives into a literal
1116 # chunk, rather we keep looking for the next real chunk. This
1117 # is because we get things like
1119 # .globl blah_closure
1125 if ( $TargetPlatform =~ /^(i386|sparc|powerpc)/ && $to_move =~ /${T_COPY_DIRVS}/ ) {
1127 while ( $j < $numchks && $chk[$j] =~ /$T_CONST_LBL/) {
1130 if ( $j < $numchks ) {
1131 $chk[$j] = $to_move . $chk[$j];
1135 elsif ( $i < ($numchks - 1)
1136 && ( $to_move =~ /${T_COPY_DIRVS}/
1137 || ($TargetPlatform =~ /^hppa/ && $to_move =~ /align/ && $chkcat[$i+1] eq 'literal') )) {
1138 $chk[$i + 1] = $to_move . $chk[$i + 1];
1139 # otherwise they're tossed
1142 $c =~ s/${T_MOVE_DIRVS}FUNNY#END#THING/FUNNY#END#THING/o;
1145 if ( $TargetPlatform =~ /^alpha-/ && $c =~ /^\t\.ent\s+(\S+)/ ) {
1147 # toss all prologue stuff, except for loading gp, and the ..ng address
1148 unless ($c =~ /\.ent.*\n\$.*\.\.ng:/) {
1149 if (($p, $r) = split(/^\t\.prologue/, $c)) {
1150 if (($keep, $junk) = split(/\.\.ng:/, $p)) {
1151 $keep =~ s/^\t\.frame.*\n/\t.frame \$30,0,\$26,0\n/;
1152 $keep =~ s/^\t\.(mask|fmask).*\n//g;
1153 $c = $keep . "..ng:\n";
1155 print STDERR "malformed code block ($ent)?\n"
1158 $c .= "\t.prologue" . $r;
1162 $c =~ s/FUNNY#END#THING//;
1164 # print STDERR "\nCHK $i (AFTER) (",$chkcat[$i],"):\n", $c;
1166 $chk[$i] = $c; # update w/ convenience copy
1169 # open CHUNKS, ">/tmp/chunks2" or die "Cannot open /tmp/chunks2: $!\n";
1170 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
1173 if ( $TargetPlatform =~ /^alpha-/ ) {
1174 # print out the header stuff first
1175 $chk[0] =~ s/^(\t\.file.*)"(ghc\d+\.c)"/$1"$ifile_root.hc"/;
1176 print OUTASM $chk[0];
1178 } elsif ( $TargetPlatform =~ /^hppa/ ) {
1179 print OUTASM $chk[0];
1181 } elsif ( $TargetPlatform =~ /^mips-/ ) {
1182 $chk[0] = "\t\.file\t1 \"$ifile_root.hc\"\n" . $chk[0];
1184 # get rid of horrible "<dollar>Revision: .*$" strings
1185 local(@lines0) = split(/\n/, $chk[0]);
1187 while ( $z <= $#lines0 ) {
1188 if ( $lines0[$z] =~ /^\t\.byte\t0x24,0x52,0x65,0x76,0x69,0x73,0x69,0x6f$/ ) {
1191 while ( $z <= $#lines0 ) {
1193 last if $lines0[$z] =~ /[,\t]0x0$/;
1199 $chk[0] = join("\n", @lines0);
1200 $chk[0] =~ s/\n\n+/\n/;
1201 print OUTASM $chk[0];
1204 # print out all the literal strings next
1205 for ($i = 0; $i < $numchks; $i++) {
1206 if ( $chkcat[$i] eq 'literal' ) {
1208 # HACK: try to detect 16-byte constants and align them
1209 # on a 16-byte boundary. x86_64 sometimes needs 128-bit
1210 # aligned constants, and so does Darwin/x86.
1211 if ( $TargetPlatform =~ /^x86_64/
1212 || $TargetPlatform =~ /^i386-apple-darwin/ ) {
1214 if ($z =~ /(\.long.*\n.*\.long.*\n.*\.long.*\n.*\.long|\.quad.*\n.*\.quad)/) {
1215 print OUTASM $T_HDR_literal16;
1217 print OUTASM $T_HDR_literal;
1220 print OUTASM $T_HDR_literal;
1223 print OUTASM $chk[$i];
1224 print OUTASM "; end literal\n" if $TargetPlatform =~ /^hppa/; # for the splitter
1226 $chkcat[$i] = 'DONE ALREADY';
1230 # on the HPPA, print out all the bss next
1231 if ( $TargetPlatform =~ /^hppa/ ) {
1232 for ($i = 1; $i < $numchks; $i++) {
1233 if ( $chkcat[$i] eq 'bss' ) {
1234 print OUTASM "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$BSS\$\n\t.align 4\n";
1235 print OUTASM $chk[$i];
1237 $chkcat[$i] = 'DONE ALREADY';
1242 for ($i = $FIRST_MANGLABLE; $i < $numchks; $i++) {
1243 # print STDERR "$i: cat $chkcat[$i], symb $chksymb[$i]\n";
1245 next if $chkcat[$i] eq 'DONE ALREADY';
1247 if ( $chkcat[$i] eq 'misc' || $chkcat[$i] eq 'unknown' ) {
1248 if ($chk[$i] ne '') {
1249 print OUTASM $T_HDR_misc;
1250 &print_doctored($chk[$i], 0);
1253 } elsif ( $chkcat[$i] eq 'toss' ) {
1254 print STDERR "*** NB: TOSSING code for $chksymb[$i] !!! ***\n";
1256 } elsif ( $chkcat[$i] eq 'data' ) {
1257 if ($chk[$i] ne '') {
1258 print OUTASM $T_HDR_data;
1259 print OUTASM $chk[$i];
1262 } elsif ( $chkcat[$i] eq 'splitmarker' ) {
1263 # we can just re-constitute this one...
1264 # NB: we emit _three_ underscores no matter what,
1265 # so ghc-split doesn't have to care.
1266 print OUTASM "___stg_split_marker",$chksymb[$i],"${T_POST_LBL}\n";
1268 } elsif ( $chkcat[$i] eq 'closure'
1269 || $chkcat[$i] eq 'srt'
1270 || $chkcat[$i] eq 'infotbl'
1271 || $chkcat[$i] eq 'entry') { # do them in that order
1272 $symb = $chksymb[$i];
1275 if ( defined($closurechk{$symb}) ) {
1276 print OUTASM $T_HDR_closure;
1277 print OUTASM $chk[$closurechk{$symb}];
1278 $chkcat[$closurechk{$symb}] = 'DONE ALREADY';
1282 if ( defined($srtchk{$symb}) ) {
1283 print OUTASM $T_HDR_relrodata;
1284 print OUTASM $chk[$srtchk{$symb}];
1285 $chkcat[$srtchk{$symb}] = 'DONE ALREADY';
1289 if ( defined($infochk{$symb}) ) {
1291 print OUTASM $T_HDR_info;
1292 print OUTASM &rev_tbl($symb, $chk[$infochk{$symb}], 1);
1294 # entry code will be put here!
1296 $chkcat[$infochk{$symb}] = 'DONE ALREADY';
1300 if ( defined($entrychk{$symb}) ) {
1302 $c = $chk[$entrychk{$symb}];
1304 # If this is an entry point with an info table,
1305 # eliminate the entry symbol and all directives involving it.
1306 if (defined($infochk{$symb}) && $TargetPlatform !~ /^ia64-/) {
1308 foreach $l (split(/\n/,$c)) {
1309 next if $l =~ /^.*$symb_(entry|ret)${T_POST_LBL}/;
1311 # If we have .type/.size direrctives involving foo_entry,
1312 # then make them refer to foo_info instead. The information
1313 # in these directives is used by the cachegrind annotator,
1314 # so it is worthwhile keeping.
1315 if ($l =~ /^\s*\.(type|size).*$symb_(entry|ret)/) {
1316 $l =~ s/$symb(_entry|_ret)/${symb}_info/g;
1320 next if $l =~ /^\s*\..*$symb.*\n?/;
1323 $c = join("\n",@o) . "\n";
1326 print OUTASM $T_HDR_entry;
1328 &print_doctored($c, 1); # NB: the 1!!!
1330 $chkcat[$entrychk{$symb}] = 'DONE ALREADY';
1333 } elsif ( $chkcat[$i] eq 'vector' ) {
1334 $symb = $chksymb[$i];
1337 if ( defined($vectorchk{$symb}) ) {
1338 print OUTASM $T_HDR_vector;
1339 print OUTASM &rev_tbl($symb, $chk[$vectorchk{$symb}], 0);
1341 # direct return code will be put here!
1342 $chkcat[$vectorchk{$symb}] = 'DONE ALREADY';
1344 } elsif ( $TargetPlatform =~ /^alpha-/ ) {
1345 # Alphas: the commented nop is for the splitter, to ensure
1346 # that no module ends with a label as the very last
1347 # thing. (The linker will adjust the label to point
1348 # to the first code word of the next module linked in,
1349 # even if alignment constraints cause the label to move!)
1351 print OUTASM "\t# nop\n";
1354 } elsif ( $chkcat[$i] eq 'rodata' ) {
1355 print OUTASM $T_HDR_rodata;
1356 print OUTASM $chk[$i];
1357 $chkcat[$i] = 'DONE ALREADY';
1358 } elsif ( $chkcat[$i] eq 'relrodata' ) {
1359 print OUTASM $T_HDR_relrodata;
1360 print OUTASM $chk[$i];
1361 $chkcat[$i] = 'DONE ALREADY';
1362 } elsif ( $chkcat[$i] eq 'toc' ) {
1363 # silly optimisation to print tocs, since they come in groups...
1364 print OUTASM $T_HDR_toc;
1366 while ($chkcat[$j] eq 'toc')
1367 { if ( $chk[$j] !~ /\.tc UpdatePAP\[TC\]/ # not needed: always turned into a jump.
1370 print OUTASM $chk[$j];
1372 $chkcat[$j] = 'DONE ALREADY';
1376 } elsif ( $TargetPlatform =~ /^.*-apple-darwin.*/ && $chkcat[$i] eq 'dyld' ) {
1377 # apple-darwin: dynamic linker stubs
1378 if($chk[$i] !~ /\.indirect_symbol ___DISCARD__/)
1379 { # print them out unchanged, but remove the stubs for __DISCARD__
1380 print OUTASM $chk[$i];
1382 } elsif ( $TargetPlatform =~ /^i386-apple-darwin.*/ && $chkcat[$i] eq 'get_pc_thunk' ) {
1383 # i386-apple-darwin: __i686.get_pc_thunk.[abcd]x
1384 print OUTASM ".section __TEXT,__textcoal_nt,coalesced,no_toc\n";
1385 print OUTASM $chk[$i];
1387 &tidy_up_and_die(1,"$Pgm: unknown chkcat (ghc-asm: $TargetPlatform)\n$chkcat[$i]\n$chk[$i]\n");
1391 print OUTASM $EXTERN_DECLS if $TargetPlatform =~ /^mips-/;
1394 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1395 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1400 sub hppa_mash_prologue { # OK, epilogue, too
1403 # toss all prologue stuff
1404 s/^\s+\.ENTRY[^\0]*--- BEGIN ---/\t.ENTRY/;
1406 # Lie about our .CALLINFO
1407 s/^\s+\.CALLINFO.*$/\t.CALLINFO NO_CALLS,NO_UNWIND/;
1414 # toss all epilogue stuff
1415 s/^\s+--- END ---[^\0]*\.EXIT/\t.EXIT/;
1417 # Sorry; we moved the _info stuff to the code segment.
1418 s/_info,DATA/_info,CODE/g;
1425 sub print_doctored {
1426 local($_, $need_fallthru_patch) = @_;
1428 if ( $TargetPlatform =~ /^x86_64-/ ) {
1431 # movq -4(%ebp), %rax
1436 s/^\tmovq\s+(-?\d*\(\%r(bx|bp|13)\)),\s*(\%r(ax|cx|dx|10|11))\n\tjmp\s+\*\3/\tjmp\t\*$1/g;
1437 s/^\tmovl\s+\$${T_US}(.*),\s*(\%e(ax|cx|si|di))\n\tjmp\s+\*\%r\3/\tjmp\t$T_US$1/g;
1440 if ( $TargetPlatform !~ /^i386-/
1441 || ! /^\t[a-z]/ # no instructions in here, apparently
1442 || /^${T_US}__stginit_[A-Za-z0-9_]+${T_POST_LBL}/) {
1447 # OK, must do some x86 **HACKING**
1449 local($entry_patch) = '';
1450 local($exit_patch) = '';
1452 # gotta watch out for weird instructions that
1453 # invisibly smash various regs:
1454 # rep* %ecx used for counting
1455 # scas* %edi used for destination index
1456 # cmps* %e[sd]i used for indices
1457 # loop* %ecx used for counting
1462 # * use of STG reg [ nn(%ebx) ] where no machine reg avail
1464 # * GCC used an "STG reg" for its own purposes
1466 # * some secret uses of machine reg, requiring STG reg
1467 # to be saved/restored
1469 # The most dangerous "GCC uses" of an "STG reg" are when
1470 # the reg holds the target of a jmp -- it's tricky to
1471 # insert the patch-up code before we get to the target!
1472 # So here we change the jmps:
1474 # --------------------------------------------------------
1475 # it can happen that we have jumps of the form...
1476 # jmp *<something involving %esp>
1478 # jmp <something involving another naughty register...>
1480 # a reasonably-common case is:
1482 # movl $_blah,<bad-reg>
1485 s/^\tmovl\s+\$${T_US}(.*),\s*(\%e[acd]x)\n\tjmp\s+\*\2/\tjmp $T_US$1/g;
1489 # movl -4(%ebx), %eax
1494 s/^\tmovl\s+(-?\d*\(\%e(bx|si)\)),\s*(\%e[acd]x)\n\tjmp\s+\*\3/\tjmp\t\*$1/g;
1496 if ($StolenX86Regs <= 2 ) { # YURGH! spurious uses of esi?
1497 s/^\tmovl\s+(.*),\s*\%esi\n\tjmp\s+\*%esi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1498 s/^\tjmp\s+\*(.*\(.*\%esi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1499 s/^\tjmp\s+\*\%esi\n/\tmovl \%esi,\%eax\n\tjmp \*\%eax\n/g;
1500 die "$Pgm: (mangler) still have jump involving \%esi!\n$_"
1501 if /(jmp|call)\s+.*\%esi/;
1503 if ($StolenX86Regs <= 3 ) { # spurious uses of edi?
1504 s/^\tmovl\s+(.*),\s*\%edi\n\tjmp\s+\*%edi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1505 s/^\tjmp\s+\*(.*\(.*\%edi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1506 s/^\tjmp\s+\*\%edi\n/\tmovl \%edi,\%eax\n\tjmp \*\%eax\n/g;
1507 die "$Pgm: (mangler) still have jump involving \%edi!\n$_"
1508 if /(jmp|call)\s+.*\%edi/;
1511 # OK, now we can decide what our patch-up code is going to
1514 # Offsets into register table - you'd better update these magic
1515 # numbers should you change its contents!
1516 # local($OFFSET_R1)=0; No offset for R1 in new RTS.
1517 local($OFFSET_Hp)=88;
1519 # Note funky ".=" stuff; we're *adding* to these _patch guys
1520 if ( $StolenX86Regs <= 2
1521 && ( /[^0-9]\(\%ebx\)/ || /\%esi/ || /^\tcmps/ ) ) { # R1 (esi)
1522 $entry_patch .= "\tmovl \%esi,(\%ebx)\n";
1523 $exit_patch .= "\tmovl (\%ebx),\%esi\n";
1525 # nothing for call_{entry,exit} because %esi is callee-save
1527 if ( $StolenX86Regs <= 3
1528 && ( /${OFFSET_Hp}\(\%ebx\)/ || /\%edi/ || /^\t(scas|cmps)/ ) ) { # Hp (edi)
1529 $entry_patch .= "\tmovl \%edi,${OFFSET_Hp}(\%ebx)\n";
1530 $exit_patch .= "\tmovl ${OFFSET_Hp}(\%ebx),\%edi\n";
1532 # nothing for call_{entry,exit} because %edi is callee-save
1535 # --------------------------------------------------------
1536 # next, here we go with non-%esp patching!
1538 s/^(\t[a-z])/$entry_patch$1/; # before first instruction
1540 # Before calling GC we must set up the exit condition before the call
1541 # and entry condition when we come back
1543 # fix _all_ non-local jumps:
1545 if ( $TargetPlatform =~ /^.*-apple-darwin.*/ ) {
1546 # On Darwin, we've got local-looking jumps that are
1547 # actually global (i.e. jumps to Lfoo$stub or via
1548 # Lfoo$non_lazy_ptr), so we fix those first.
1549 # In fact, we just fix everything that contains a dollar
1550 # because false positives don't hurt here.
1552 s/^(\tjmp\s+\*?L.*\$.*\n)/$exit_patch$1/g;
1555 s/^\tjmp\s+\*${T_X86_PRE_LLBL_PAT}/\tJMP___SL/go;
1556 s/^\tjmp\s+${T_X86_PRE_LLBL_PAT}/\tJMP___L/go;
1558 s/^(\tjmp\s+.*\n)/$exit_patch$1/g; # here's the fix...
1560 s/^\tJMP___SL/\tjmp \*${T_X86_PRE_LLBL}/go;
1561 s/^\tJMP___L/\tjmp ${T_X86_PRE_LLBL}/go;
1563 if ($StolenX86Regs == 2 ) {
1564 die "ARGH! Jump uses \%esi or \%edi with -monly-2-regs:\n$_"
1565 if /^\t(jmp|call)\s+.*\%e(si|di)/;
1566 } elsif ($StolenX86Regs == 3 ) {
1567 die "ARGH! Jump uses \%edi with -monly-3-regs:\n$_"
1568 if /^\t(jmp|call)\s+.*\%edi/;
1571 # --------------------------------------------------------
1572 # that's it -- print it
1574 #die "Funny jumps?\n$_" if /${T_X86_BADJMP}/o; # paranoia
1578 if ( $need_fallthru_patch ) { # exit patch for end of slow entry code
1579 print OUTASM $exit_patch;
1580 # ToDo: make it not print if there is a "jmp" at the end
1586 sub init_FUNNY_THINGS {
1587 %KNOWN_FUNNY_THING = (
1589 # "${T_US}stg_.*{T_POST_LBL}", 1,
1594 The following table reversal is used for both info tables and return
1595 vectors. In both cases, we remove the first entry from the table,
1596 reverse the table, put the label at the end, and paste some code
1597 (that which is normally referred to by the first entry in the table)
1598 right after the table itself. (The code pasting is done elsewhere.)
1602 local($symb, $tbl, $discard1) = @_;
1604 return ($tbl) if ($TargetPlatform =~ /^ia64-/);
1606 local($before) = '';
1608 local(@imports) = (); # hppa only
1611 local(@lines) = split(/\n/, $tbl);
1614 # Deal with the header...
1615 for ($i = 0; $i <= $#lines && $lines[$i] !~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1616 $label .= $lines[$i] . "\n",
1617 next if $lines[$i] =~ /^[A-Za-z0-9_]+_info${T_POST_LBL}$/o
1618 || $lines[$i] =~ /${T_DOT_GLOBAL}/o
1619 || $lines[$i] =~ /^${T_US}\S+_vtbl${T_POST_LBL}$/o;
1621 $before .= $lines[$i] . "\n"; # otherwise...
1625 $infoname =~ s/(.|\n)*^([A-Za-z0-9_]+_info)${T_POST_LBL}$(.|\n)*/\2/;
1627 # Grab the table data...
1628 if ( $TargetPlatform !~ /^hppa/ ) {
1629 for ( ; $i <= $#lines && $lines[$i] =~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1631 # Convert addresses of SRTs, slow entrypoints and large bitmaps
1632 # to offsets (relative to the info label),
1633 # in order to support position independent code.
1634 $line =~ s/$infoname/0/
1635 || $line =~ s/([A-Za-z0-9_]+_srtd)$/\1 - $infoname/
1636 || $line =~ s/([A-Za-z0-9_]+_srt(\+\d+)?)$/\1 - $infoname/
1637 || $line =~ s/([A-Za-z0-9_]+_slow)$/\1 - $infoname/
1638 || $line =~ s/([A-Za-z0-9_]+_btm)$/\1 - $infoname/
1639 || $line =~ s/([A-Za-z0-9_]+_alt)$/\1 - $infoname/
1640 || $line =~ s/([A-Za-z0-9_]+_dflt)$/\1 - $infoname/
1641 || $line =~ s/([A-Za-z0-9_]+_ret)$/\1 - $infoname/;
1642 push(@words, $line);
1644 } else { # hppa weirdness
1645 for ( ; $i <= $#lines && $lines[$i] =~ /^\s+(${T_DOT_WORD}|\.IMPORT)/; $i++) {
1646 # FIXME: the RTS now expects offsets instead of addresses
1647 # for all labels in info tables.
1648 if ($lines[$i] =~ /^\s+\.IMPORT/) {
1649 push(@imports, $lines[$i]);
1651 # We don't use HP's ``function pointers''
1652 # We just use labels in code space, like normal people
1653 $lines[$i] =~ s/P%//;
1654 push(@words, $lines[$i]);
1659 # Now throw away any initial zero word from the table. This is a hack
1660 # that lets us reduce the size of info tables when the SRT field is not
1661 # needed: see comments StgFunInfoTable in InfoTables.h.
1663 # The .zero business is for Linux/ELF.
1664 # The .skip business is for Sparc/Solaris/ELF.
1665 # The .blockz business is for HPPA.
1667 # if ($words[0] =~ /^\t?(${T_DOT_WORD}\s+0|\.zero\s+4|\.skip\s+4|\.blockz\s+4)/) {
1672 for (; $i <= $#lines; $i++) {
1673 $after .= $lines[$i] . "\n";
1676 # Alphas: If we have anonymous text (not part of a procedure), the
1677 # linker may complain about missing exception information. Bleh.
1678 # To suppress this, we place a .ent/.end pair around the code.
1679 # At the same time, we have to be careful and not enclose any leading
1680 # .file/.loc directives.
1681 if ( $TargetPlatform =~ /^alpha-/ && $label =~ /^([A-Za-z0-9_]+):$/) {
1682 local ($ident) = $1;
1683 $before =~ s/^((\s*\.(file|loc)\s+[^\n]*\n)*)/$1\t.ent $ident\n/;
1684 $after .= "\t.end $ident\n";
1687 # Alphas: The heroic Simon Marlow found a bug in the Digital UNIX
1688 # assembler (!) wherein .quad constants inside .text sections are
1689 # first narrowed to 32 bits then sign-extended back to 64 bits.
1690 # This obviously screws up our 64-bit bitmaps, so we work around
1691 # the bug by replacing .quad with .align 3 + .long + .long [ccshan]
1692 if ( $TargetPlatform =~ /^alpha-/ ) {
1694 if (/^\s*\.quad\s+([-+0-9].*\S)\s*$/ && length $1 >= 10) {
1695 local ($number) = $1;
1696 if ($number =~ /^([-+])?(0x?)?([0-9]+)$/) {
1697 local ($sign, $base, $digits) = ($1, $2, $3);
1698 $base = (10, 8, 16)[length $base];
1699 local ($hi, $lo) = (0, 0);
1700 foreach $i (split(//, $digits)) {
1701 $j = $lo * $base + $i;
1702 $lo = $j % 4294967296;
1703 $hi = $hi * $base + ($j - $lo) / 4294967296;
1705 ($hi, $lo) = (4294967295 - $hi, 4294967296 - $lo)
1707 $_ = "\t.align 3\n\t.long $lo\n\t.long $hi\n";
1708 # printf STDERR "TURNING %s into 0x %08x %08x\n", $number, $hi, $lo;
1710 print STDERR "Cannot handle \".quad $number\" in info table\n";
1718 . (($TargetPlatform !~ /^hppa/) ? '' : join("\n", @imports) . "\n")
1719 . join("\n", @words) . "\n"
1722 # print STDERR "before=$before\n";
1723 # print STDERR "label=$label\n";
1724 # print STDERR "words=",(reverse @words),"\n";
1725 # print STDERR "after=$after\n";
1731 The HP is a major nuisance. The threaded code mangler moved info
1732 tables from data space to code space, but unthreaded code in the RTS
1733 still has references to info tables in data space. Since the HP
1734 linker is very precise about where symbols live, we need to patch the
1735 references in the unthreaded RTS as well.
1738 sub mini_mangle_asm_hppa {
1739 local($in_asmf, $out_asmf) = @_;
1741 open(INASM, "< $in_asmf")
1742 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
1743 open(OUTASM,"> $out_asmf")
1744 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
1747 s/_info,DATA/_info,CODE/; # Move _info references to code space
1753 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1754 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1760 sub tidy_up_and_die {
1761 local($return_val, $msg) = @_;
1763 exit (($return_val == 0) ? 0 : 1);