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 ( /^${T_US}([A-Za-z0-9_]+)_(alt|dflt)${T_POST_LBL}$/o ) {
704 $chkcat[$i] = 'misc';
706 } elsif ( /^${T_US}([A-Za-z0-9_]+)_vtbl${T_POST_LBL}$/o ) {
708 $chkcat[$i] = 'vector';
713 } elsif ( $TargetPlatform =~ /^i386-.*-solaris2/
714 && /^[A-Za-z0-9][A-Za-z0-9_]*:/ ) {
715 # Some Solaris system headers contain function definitions (as
716 # opposed to mere prototypes), which end up in the .hc file when
717 # a Haskell module foreign imports the corresponding system
718 # functions (most notably stat()). We put them into the text
719 # segment. Note that this currently does not extend to function
720 # names starting with an underscore.
723 $chkcat[$i] = 'misc';
726 } elsif ( $TargetPlatform =~ /^i386-apple-darwin/ && /^(___i686\.get_pc_thunk\.[abcd]x):/o) {
727 # To handle PIC on Darwin/x86, we need to appropriately pass through
728 # the get_pc_thunk functions. The need to be put into a special section
729 # marked as coalesced (otherwise the .weak_definition doesn't work
732 $chkcat[$i] = 'get_pc_thunk';
735 } elsif ( /^${T_US}[A-Za-z0-9_]/o
736 && ( $TargetPlatform !~ /^hppa/ # need to avoid local labels in this case
738 && ( $TargetPlatform !~ /^powerpc64/ # we need to avoid local labels in this case
739 || ! /^\.L\d+:$/ ) ) {
746 /^${T_US}stg_.*${T_POST_LBL}$/o # RTS internals
747 || /^${T_US}__stg_.*${T_POST_LBL}$/o # more RTS internals
748 || /^${T_US}__fexp_.*${T_POST_LBL}$/o # foreign export
749 || /^${T_US}.*_slow${T_POST_LBL}$/o # slow entry
750 || /^${T_US}__stginit.*${T_POST_LBL}$/o # __stginit<module>
751 || /^${T_US}.*_btm${T_POST_LBL}$/o # large bitmaps
752 || /^${T_US}.*_fast${T_POST_LBL}$/o # primops
753 || /^_uname:/o # x86/Solaris2
756 $chkcat[$i] = 'misc';
758 /^${T_US}.*_srtd${T_POST_LBL}$/o # large bitmaps
759 || /^${T_US}.*_closure_tbl${T_POST_LBL}$/o # closure tables
762 $chkcat[$i] = 'relrodata';
765 print STDERR "Warning: retaining unknown function \`$thing' in output from C compiler\n";
766 $chkcat[$i] = 'unknown';
769 } elsif ( $TargetPlatform =~ /^powerpc-.*-linux/ && /^\.LCTOC1 = /o ) {
770 # PowerPC Linux's large-model PIC (-fPIC) generates a gobal offset
771 # table "by hand". Be sure to copy it over.
772 # Note that this label and all entries in the table should actually
773 # go into the .got2 section, but it isn't easy to distinguish them
774 # from other constant literals (.LC\d+), so we just put everything
777 $chkcat[$i] = 'literal';
778 $chksymb[$i] = 'LCTOC1';
779 } else { # simple line (duplicated at the top)
784 $numchks = $#chk + 1;
786 # open CHUNKS, ">/tmp/chunks1" or die "Cannot open /tmp/chunks1: $!\n";
787 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
790 # the division into chunks is imperfect;
791 # we throw some things over the fence into the next
794 # also, there are things we would like to know
795 # about the whole module before we start spitting
798 local($FIRST_MANGLABLE) = ($TargetPlatform =~ /^(alpha-|hppa|mips-)/) ? 1 : 0;
799 local($FIRST_TOSSABLE ) = ($TargetPlatform =~ /^(hppa|mips-)/) ? 1 : 0;
801 # print STDERR "first chunk to mangle: $FIRST_MANGLABLE\n";
803 # Alphas: NB: we start meddling at chunk 1, not chunk 0
804 # The first ".rdata" is quite magical; as of GCC 2.7.x, it
805 # spits a ".quad 0" in after the very first ".rdata"; we
806 # detect this special case (tossing the ".quad 0")!
807 local($magic_rdata_seen) = 0;
809 # HPPAs, MIPSen: also start medding at chunk 1
811 for ($i = $FIRST_TOSSABLE; $i < $numchks; $i++) {
812 $c = $chk[$i]; # convenience copy
814 # print STDERR "\nCHK $i (BEFORE) (",$chkcat[$i],"):\n", $c;
816 # toss all prologue stuff; HPPA is pretty weird
818 $c = &hppa_mash_prologue($c) if $TargetPlatform =~ /^hppa-/;
820 # be slightly paranoid to make sure there's
821 # nothing surprising in there
822 if ( $c =~ /--- BEGIN ---/ ) {
823 if (($p, $r) = split(/--- BEGIN ---/, $c)) {
825 # remove junk whitespace around the split point
829 if ($TargetPlatform =~ /^i386-/) {
830 if ($p =~ /^\tsubl\s+\$(\d+),\s*\%esp\n/) {
832 die "Error: reserved stack space exceeded!\n Possible workarounds: compile with -fasm, or try another version of gcc.\n"
836 # gcc 3.4.3 puts this kind of stuff in the prologue, eg.
837 # when compiling PrimOps.cmm with -optc-O2:
840 # movl %ecx, 16(%esp)
841 # movl %edx, 20(%esp)
842 # but then the code of the function doesn't assume
843 # anything about the contnets of these stack locations.
844 # I think it's to do with the use of inline functions for
845 # PK_Word64() and friends, where gcc is initialising the
846 # contents of the struct to zero, and failing to optimise
847 # away the initialisation. Let's live dangerously and
848 # discard these initalisations.
850 $p =~ s/^\tpushl\s+\%e(di|si|bx)\n//g;
851 $p =~ s/^\txorl\s+\%e(ax|cx|dx),\s*\%e(ax|cx|dx)\n//g;
852 $p =~ s/^\tmovl\s+\%e(ax|cx|dx|si|di),\s*\d*\(\%esp\)\n//g;
853 $p =~ s/^\tmovl\s+\$\d+,\s*\d*\(\%esp\)\n//g;
854 $p =~ s/^\tsubl\s+\$\d+,\s*\%esp\n//;
855 $p =~ s/^\tmovl\s+\$\d+,\s*\%eax\n\tcall\s+__alloca\n// if ($TargetPlatform =~ /^.*-(cygwin32|mingw32)/);
857 if ($TargetPlatform =~ /^i386-apple-darwin/) {
859 $pcrel_label =~ s/(.|\n)*^(\"?L\d+\$pb\"?):\n(.|\n)*/$2/ or $pcrel_label = "";
861 $pcrel_reg =~ s/(.|\n)*.*___i686\.get_pc_thunk\.([abcd]x)\n(.|\n)*/$2/ or $pcrel_reg = "";
862 $p =~ s/^\s+call\s+___i686\.get_pc_thunk\..x//;
863 $p =~ s/^\"?L\d+\$pb\"?:\n//;
865 if ($pcrel_reg eq "bx") {
866 # Bad gcc. Goes and uses %ebx, our BaseReg, for PIC. Bad gcc.
867 die "Darwin/x86: -fPIC -via-C doesn't work yet, use -fasm. Aborting."
871 } elsif ($TargetPlatform =~ /^x86_64-/) {
872 $p =~ s/^\tpushq\s+\%r(bx|bp|12|13|14)\n//g;
873 $p =~ s/^\tmovq\s+\%r(bx|bp|12|13|14),\s*\d*\(\%rsp\)\n//g;
874 $p =~ s/^\tsubq\s+\$\d+,\s*\%rsp\n//;
876 } elsif ($TargetPlatform =~ /^ia64-/) {
877 $p =~ s/^\t\.prologue .*\n//;
878 $p =~ s/^\t\.save ar\.pfs, r\d+\n\talloc r\d+ = ar\.pfs, 0, 3[12], \d+, 0\n//;
879 $p =~ s/^\t\.fframe \d+\n\tadds r12 = -\d+, r12\n//;
880 $p =~ s/^\t\.save rp, r\d+\n\tmov r\d+ = b0\n//;
881 $p =~ s/^\t\.(mii|mmi)\n//g; # bundling is no longer sensible
882 $p =~ s/^\t;;\n//g; # discard stops
883 $p =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
885 # GCC 3.3 saves r1 in the prologue, move this to the body
886 if ($p =~ /^\tmov r\d+ = r1\n/) {
890 } elsif ($TargetPlatform =~ /^m68k-/) {
891 $p =~ s/^\tlink a6,#-?\d.*\n//;
892 $p =~ s/^\tpea a6@\n\tmovel sp,a6\n//;
893 # The above showed up in the asm code,
894 # so I added it here.
895 # I hope it's correct.
897 $p =~ s/^\tmovel d2,sp\@-\n//;
898 $p =~ s/^\tmovel d5,sp\@-\n//; # SMmark.* only?
899 $p =~ s/^\tmoveml \#0x[0-9a-f]+,sp\@-\n//; # SMmark.* only?
900 } elsif ($TargetPlatform =~ /^mips-/) {
901 # the .frame/.mask/.fmask that we use is the same
902 # as that produced by GCC for miniInterpret; this
903 # gives GDB some chance of figuring out what happened
904 $FRAME = "\t.frame\t\$sp,2168,\$31\n\t.mask\t0x90000000,-4\n\t.fmask\t0x00000000,0\n";
905 $p =~ s/^\t\.(frame).*\n/__FRAME__/g;
906 $p =~ s/^\t\.(mask|fmask).*\n//g;
907 $p =~ s/^\t\.cprestore.*\n/\t\.cprestore 416\n/; # 16 + 100 4-byte args
908 $p =~ s/^\tsubu\t\$sp,\$sp,\d+\n//;
909 $p =~ s/^\tsw\t\$31,\d+\(\$sp\)\n//;
910 $p =~ s/^\tsw\t\$fp,\d+\(\$sp\)\n//;
911 $p =~ s/^\tsw\t\$28,\d+\(\$sp\)\n//;
912 $p =~ s/__FRAME__/$FRAME/;
913 } elsif ($TargetPlatform =~ /^powerpc-apple-darwin.*/) {
915 $pcrel_label =~ s/(.|\n)*^(\"?L\d+\$pb\"?):\n(.|\n)*/$2/ or $pcrel_label = "";
917 $p =~ s/^\tmflr r0\n//;
918 $p =~ s/^\tbl saveFP # f\d+\n//;
919 $p =~ s/^\tbl saveFP ; save f\d+-f\d+\n//;
920 $p =~ s/^\"?L\d+\$pb\"?:\n//;
921 $p =~ s/^\tstmw r\d+,-\d+\(r1\)\n//;
922 $p =~ s/^\tstfd f\d+,-\d+\(r1\)\n//g;
923 $p =~ s/^\tstw r0,\d+\(r1\)\n//g;
924 $p =~ s/^\tstwu r1,-\d+\(r1\)\n//;
925 $p =~ s/^\tstw r\d+,-\d+\(r1\)\n//g;
926 $p =~ s/^\tbcl 20,31,L\d+\$pb\n//;
927 $p =~ s/^L\d+\$pb:\n//;
928 $p =~ s/^\tmflr r31\n//;
930 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
931 # under some circumstances, only when generating position dependent code.
932 # I have no idea why, and I don't think it is necessary, so let's toss it.
933 $p =~ s/^\tli r\d+,0\n//g;
934 $p =~ s/^\tstw r\d+,\d+\(r1\)\n//g;
935 } elsif ($TargetPlatform =~ /^powerpc-.*-linux/) {
936 $p =~ s/^\tmflr 0\n//;
937 $p =~ s/^\tstmw \d+,\d+\(1\)\n//;
938 $p =~ s/^\tstfd \d+,\d+\(1\)\n//g;
939 $p =~ s/^\tstw r0,8\(1\)\n//;
940 $p =~ s/^\tstwu 1,-\d+\(1\)\n//;
941 $p =~ s/^\tstw \d+,\d+\(1\)\n//g;
943 # GCC's "large-model" PIC (-fPIC)
945 $pcrel_label =~ s/(.|\n)*^.LCF(\d+):\n(.|\n)*/$2/ or $pcrel_label = "";
947 $p =~ s/^\tbcl 20,31,.LCF\d+\n//;
948 $p =~ s/^.LCF\d+:\n//;
949 $p =~ s/^\tmflr 30\n//;
950 $p =~ s/^\tlwz 0,\.LCL\d+-\.LCF\d+\(30\)\n//;
951 $p =~ s/^\tadd 30,0,30\n//;
953 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
954 # under some circumstances, only when generating position dependent code.
955 # I have no idea why, and I don't think it is necessary, so let's toss it.
956 $p =~ s/^\tli \d+,0\n//g;
957 $p =~ s/^\tstw \d+,\d+\(1\)\n//g;
958 } elsif ($TargetPlatform =~ /^powerpc64-.*-linux/) {
959 $p =~ s/^\tmr 31,1\n//;
960 $p =~ s/^\tmflr 0\n//;
961 $p =~ s/^\tstmw \d+,\d+\(1\)\n//;
962 $p =~ s/^\tstfd \d+,-?\d+\(1\)\n//g;
963 $p =~ s/^\tstd r0,8\(1\)\n//;
964 $p =~ s/^\tstdu 1,-\d+\(1\)\n//;
965 $p =~ s/^\tstd \d+,-?\d+\(1\)\n//g;
967 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
968 # under some circumstances, only when generating position dependent code.
969 # I have no idea why, and I don't think it is necessary, so let's toss it.
970 $p =~ s/^\tli \d+,0\n//g;
971 $p =~ s/^\tstd \d+,\d+\(1\)\n//g;
973 print STDERR "$Pgm: unknown prologue mangling? $TargetPlatform\n";
976 # HWL HACK: dont die, just print a warning
977 #print stderr "HWL: this should die! Prologue junk?: $p\n" if $p =~ /^\t[^\.]/;
978 die "Prologue junk?: $p\n" if $p =~ /^\s+[^\s\.]/;
980 # For PIC, we want to keep part of the prologue
981 if ($TargetPlatform =~ /^powerpc-apple-darwin.*/ && $pcrel_label ne "") {
982 # Darwin: load the current instruction pointer into register r31
983 $p .= "bcl 20,31,$pcrel_label\n";
984 $p .= "$pcrel_label:\n";
985 $p .= "\tmflr r31\n";
986 } elsif ($TargetPlatform =~ /^powerpc-.*-linux/ && $pcrel_label ne "") {
987 # Linux: load the GOT pointer into register 30
988 $p .= "\tbcl 20,31,.LCF$pcrel_label\n";
989 $p .= ".LCF$pcrel_label:\n";
991 $p .= "\tlwz 0,.LCL$pcrel_label-.LCF$pcrel_label(30)\n";
992 $p .= "\tadd 30,0,30\n";
993 } elsif ($TargetPlatform =~ /^i386-apple-darwin.*/ && $pcrel_label ne "") {
994 $p .= "\tcall ___i686.get_pc_thunk.$pcrel_reg\n";
995 $p .= "$pcrel_label:\n";
998 # glue together what's left
1003 if ( $TargetPlatform =~ /^mips-/ ) {
1004 # MIPS: first, this basic sequence may occur "--- END ---" or not
1005 $c =~ s/^\tlw\t\$31,\d+\(\$sp\)\n\taddu\t\$sp,\$sp,\d+\n\tj\t\$31\n\t\.end/\t\.end/;
1008 # toss all epilogue stuff; again, paranoidly
1009 if ( $c =~ /--- END ---/ ) {
1010 if (($r, $e) = split(/--- END ---/, $c)) {
1011 if ($TargetPlatform =~ /^i386-/) {
1013 $e =~ s/^\tpopl\s+\%edi\n//;
1014 $e =~ s/^\tpopl\s+\%esi\n//;
1015 $e =~ s/^\tpopl\s+\%edx\n//;
1016 $e =~ s/^\tpopl\s+\%ecx\n//;
1017 $e =~ s/^\taddl\s+\$\d+,\s*\%esp\n//;
1018 $e =~ s/^\tsubl\s+\$-\d+,\s*\%esp\n//;
1019 } elsif ($TargetPlatform =~ /^ia64-/) {
1020 $e =~ s/^\tmov ar\.pfs = r\d+\n//;
1021 $e =~ s/^\tmov b0 = r\d+\n//;
1022 $e =~ s/^\t\.restore sp\n\tadds r12 = \d+, r12\n//;
1023 $e =~ s/^\tbr\.ret\.sptk\.many b0\n//;
1024 $e =~ s/^\t\.(mii|mmi|mib)\n//g; # bundling is no longer sensible
1025 $e =~ s/^\t;;\n//g; # discard stops - stop at end of body is sufficient
1026 $e =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
1027 } elsif ($TargetPlatform =~ /^m68k-/) {
1028 $e =~ s/^\tunlk a6\n//;
1030 } elsif ($TargetPlatform =~ /^mips-/) {
1031 $e =~ s/^\tlw\t\$31,\d+\(\$sp\)\n//;
1032 $e =~ s/^\tlw\t\$fp,\d+\(\$sp\)\n//;
1033 $e =~ s/^\taddu\t\$sp,\$sp,\d+\n//;
1034 $e =~ s/^\tj\t\$31\n//;
1035 } elsif ($TargetPlatform =~ /^powerpc-apple-darwin.*/) {
1036 $e =~ s/^\taddi r1,r1,\d+\n//;
1037 $e =~ s/^\tlwz r\d+,\d+\(r1\)\n//;
1038 $e =~ s/^\tlmw r\d+,-\d+\(r1\)\n//;
1039 $e =~ s/^\tmtlr r0\n//;
1041 $e =~ s/^\tb restFP ;.*\n//;
1042 } elsif ($TargetPlatform =~ /^powerpc64-.*-linux/) {
1043 $e =~ s/^\tmr 3,0\n//;
1044 $e =~ s/^\taddi 1,1,\d+\n//;
1045 $e =~ s/^\tld 0,16\(1\)\n//;
1046 $e =~ s/^\tmtlr 0\n//;
1048 # callee-save registers
1049 $e =~ s/^\tld \d+,-?\d+\(1\)\n//g;
1050 $e =~ s/^\tlfd \d+,-?\d+\(1\)\n//g;
1052 # get rid of the debug junk along with the blr
1053 $e =~ s/^\tblr\n\t.long .*\n\t.byte .*\n//;
1055 # incase we missed it with the last one get the blr alone
1058 print STDERR "$Pgm: unknown epilogue mangling? $TargetPlatform\n";
1061 print STDERR "WARNING: Epilogue junk?: $e\n" if $e =~ /^\t\s*[^\.\s\n]/;
1063 # glue together what's left
1065 $c =~ s/\n\t\n/\n/; # junk blank line
1069 # On SPARCs, we don't do --- BEGIN/END ---, we just
1070 # toss the register-windowing save/restore/ret* instructions
1071 # directly unless they've been generated by function definitions in header
1073 if ( $TargetPlatform =~ /^sparc-/ ) {
1074 if ( ! ( $TargetPlatform =~ /solaris2$/ && $chkcat[$i] eq 'unknown' )) {
1075 $c =~ s/^\t(save.*|restore.*|ret|retl)\n//g;
1077 # throw away PROLOGUE comments
1078 $c =~ s/^\t!#PROLOGUE# 0\n\t!#PROLOGUE# 1\n//;
1081 # On Alphas, the prologue mangling is done a little later (below)
1083 # toss all calls to __DISCARD__
1084 $c =~ s/^\t(call|jbsr|jal)\s+${T_US}__DISCARD__\n//go;
1085 $c =~ s/^\tjsr\s+\$26\s*,\s*${T_US}__DISCARD__\n//go if $TargetPlatform =~ /^alpha-/;
1086 $c =~ s/^\tbl\s+L___DISCARD__\$stub\n//go if $TargetPlatform =~ /^powerpc-apple-darwin.*/;
1087 $c =~ s/^\tbl\s+__DISCARD__(\@plt)?\n//go if $TargetPlatform =~ /^powerpc-.*-linux/;
1088 $c =~ s/^\tbl\s+\.__DISCARD__\n\s+nop\n//go if $TargetPlatform =~ /^powerpc64-.*-linux/;
1089 $c =~ s/^\tcall\s+L___DISCARD__\$stub\n//go if $TargetPlatform =~ /i386-apple-darwin.*/;
1091 # IA64: mangle tailcalls into jumps here
1092 if ($TargetPlatform =~ /^ia64-/) {
1093 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/) {
1094 # Eek, the gcc optimiser is getting smarter... if we see a jump to the --- TAILCALL ---
1095 # marker then we reapply the substitution at the source sites
1096 $c =~ s/^\tbr \.L$2\n/\t--- TAILCALL ---\n/g if ($2);
1100 # MIPS: that may leave some gratuitous asm macros around
1101 # (no harm done; but we get rid of them to be tidier)
1102 $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/
1103 if $TargetPlatform =~ /^mips-/;
1105 # toss stack adjustment after DoSparks
1106 $c =~ s/^(\tjbsr _DoSparks\n)\taddqw #8,sp/$1/g
1107 if $TargetPlatform =~ /^m68k-/; # this looks old...
1109 if ( $TargetPlatform =~ /^alpha-/ &&
1110 ! $magic_rdata_seen &&
1111 $c =~ /^\s*\.rdata\n\t\.quad 0\n\t\.align \d\n/ ) {
1112 $c =~ s/^\s*\.rdata\n\t\.quad 0\n\t\.align (\d)\n/\.rdata\n\t\.align $1\n/;
1113 $magic_rdata_seen = 1;
1116 # pick some end-things and move them to the next chunk
1118 # pin a funny end-thing on (for easier matching):
1119 $c .= 'FUNNY#END#THING';
1121 while ( $c =~ /${T_MOVE_DIRVS}FUNNY#END#THING/o ) {
1125 # on x86 we try not to copy any directives into a literal
1126 # chunk, rather we keep looking for the next real chunk. This
1127 # is because we get things like
1129 # .globl blah_closure
1135 if ( $TargetPlatform =~ /^(i386|sparc|powerpc)/ && $to_move =~ /${T_COPY_DIRVS}/ ) {
1137 while ( $j < $numchks && $chk[$j] =~ /$T_CONST_LBL/) {
1140 if ( $j < $numchks ) {
1141 $chk[$j] = $to_move . $chk[$j];
1145 elsif ( $i < ($numchks - 1)
1146 && ( $to_move =~ /${T_COPY_DIRVS}/
1147 || ($TargetPlatform =~ /^hppa/ && $to_move =~ /align/ && $chkcat[$i+1] eq 'literal') )) {
1148 $chk[$i + 1] = $to_move . $chk[$i + 1];
1149 # otherwise they're tossed
1152 $c =~ s/${T_MOVE_DIRVS}FUNNY#END#THING/FUNNY#END#THING/o;
1155 if ( $TargetPlatform =~ /^alpha-/ && $c =~ /^\t\.ent\s+(\S+)/ ) {
1157 # toss all prologue stuff, except for loading gp, and the ..ng address
1158 unless ($c =~ /\.ent.*\n\$.*\.\.ng:/) {
1159 if (($p, $r) = split(/^\t\.prologue/, $c)) {
1160 if (($keep, $junk) = split(/\.\.ng:/, $p)) {
1161 $keep =~ s/^\t\.frame.*\n/\t.frame \$30,0,\$26,0\n/;
1162 $keep =~ s/^\t\.(mask|fmask).*\n//g;
1163 $c = $keep . "..ng:\n";
1165 print STDERR "malformed code block ($ent)?\n"
1168 $c .= "\t.prologue" . $r;
1172 $c =~ s/FUNNY#END#THING//;
1174 # print STDERR "\nCHK $i (AFTER) (",$chkcat[$i],"):\n", $c;
1176 $chk[$i] = $c; # update w/ convenience copy
1179 # open CHUNKS, ">/tmp/chunks2" or die "Cannot open /tmp/chunks2: $!\n";
1180 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
1183 if ( $TargetPlatform =~ /^alpha-/ ) {
1184 # print out the header stuff first
1185 $chk[0] =~ s/^(\t\.file.*)"(ghc\d+\.c)"/$1"$ifile_root.hc"/;
1186 print OUTASM $chk[0];
1188 } elsif ( $TargetPlatform =~ /^hppa/ ) {
1189 print OUTASM $chk[0];
1191 } elsif ( $TargetPlatform =~ /^mips-/ ) {
1192 $chk[0] = "\t\.file\t1 \"$ifile_root.hc\"\n" . $chk[0];
1194 # get rid of horrible "<dollar>Revision: .*$" strings
1195 local(@lines0) = split(/\n/, $chk[0]);
1197 while ( $z <= $#lines0 ) {
1198 if ( $lines0[$z] =~ /^\t\.byte\t0x24,0x52,0x65,0x76,0x69,0x73,0x69,0x6f$/ ) {
1201 while ( $z <= $#lines0 ) {
1203 last if $lines0[$z] =~ /[,\t]0x0$/;
1209 $chk[0] = join("\n", @lines0);
1210 $chk[0] =~ s/\n\n+/\n/;
1211 print OUTASM $chk[0];
1214 # print out all the literal strings next
1215 for ($i = 0; $i < $numchks; $i++) {
1216 if ( $chkcat[$i] eq 'literal' ) {
1218 # HACK: try to detect 16-byte constants and align them
1219 # on a 16-byte boundary. x86_64 sometimes needs 128-bit
1220 # aligned constants, and so does Darwin/x86.
1221 if ( $TargetPlatform =~ /^x86_64/
1222 || $TargetPlatform =~ /^i386-apple-darwin/ ) {
1224 if ($z =~ /(\.long.*\n.*\.long.*\n.*\.long.*\n.*\.long|\.quad.*\n.*\.quad)/) {
1225 print OUTASM $T_HDR_literal16;
1227 print OUTASM $T_HDR_literal;
1230 print OUTASM $T_HDR_literal;
1233 print OUTASM $chk[$i];
1234 print OUTASM "; end literal\n" if $TargetPlatform =~ /^hppa/; # for the splitter
1236 $chkcat[$i] = 'DONE ALREADY';
1240 # on the HPPA, print out all the bss next
1241 if ( $TargetPlatform =~ /^hppa/ ) {
1242 for ($i = 1; $i < $numchks; $i++) {
1243 if ( $chkcat[$i] eq 'bss' ) {
1244 print OUTASM "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$BSS\$\n\t.align 4\n";
1245 print OUTASM $chk[$i];
1247 $chkcat[$i] = 'DONE ALREADY';
1252 for ($i = $FIRST_MANGLABLE; $i < $numchks; $i++) {
1253 # print STDERR "$i: cat $chkcat[$i], symb $chksymb[$i]\n";
1255 next if $chkcat[$i] eq 'DONE ALREADY';
1257 if ( $chkcat[$i] eq 'misc' || $chkcat[$i] eq 'unknown' ) {
1258 if ($chk[$i] ne '') {
1259 print OUTASM $T_HDR_misc;
1260 &print_doctored($chk[$i], 0);
1263 } elsif ( $chkcat[$i] eq 'toss' ) {
1264 print STDERR "*** NB: TOSSING code for $chksymb[$i] !!! ***\n";
1266 } elsif ( $chkcat[$i] eq 'data' ) {
1267 if ($chk[$i] ne '') {
1268 print OUTASM $T_HDR_data;
1269 print OUTASM $chk[$i];
1272 } elsif ( $chkcat[$i] eq 'splitmarker' ) {
1273 # we can just re-constitute this one...
1274 # NB: we emit _three_ underscores no matter what,
1275 # so ghc-split doesn't have to care.
1276 print OUTASM "___stg_split_marker",$chksymb[$i],"${T_POST_LBL}\n";
1278 } elsif ( $chkcat[$i] eq 'closure'
1279 || $chkcat[$i] eq 'srt'
1280 || $chkcat[$i] eq 'infotbl'
1281 || $chkcat[$i] eq 'entry') { # do them in that order
1282 $symb = $chksymb[$i];
1285 if ( defined($closurechk{$symb}) ) {
1286 print OUTASM $T_HDR_closure;
1287 print OUTASM $chk[$closurechk{$symb}];
1288 $chkcat[$closurechk{$symb}] = 'DONE ALREADY';
1292 if ( defined($srtchk{$symb}) ) {
1293 print OUTASM $T_HDR_relrodata;
1294 print OUTASM $chk[$srtchk{$symb}];
1295 $chkcat[$srtchk{$symb}] = 'DONE ALREADY';
1299 if ( defined($infochk{$symb}) ) {
1301 print OUTASM $T_HDR_info;
1302 print OUTASM &rev_tbl($symb, $chk[$infochk{$symb}], 1);
1304 # entry code will be put here!
1306 $chkcat[$infochk{$symb}] = 'DONE ALREADY';
1310 if ( defined($entrychk{$symb}) ) {
1312 $c = $chk[$entrychk{$symb}];
1314 # If this is an entry point with an info table,
1315 # eliminate the entry symbol and all directives involving it.
1316 if (defined($infochk{$symb}) && $TargetPlatform !~ /^ia64-/) {
1318 foreach $l (split(/\n/,$c)) {
1319 next if $l =~ /^.*$symb_(entry|ret)${T_POST_LBL}/;
1321 # If we have .type/.size direrctives involving foo_entry,
1322 # then make them refer to foo_info instead. The information
1323 # in these directives is used by the cachegrind annotator,
1324 # so it is worthwhile keeping.
1325 if ($l =~ /^\s*\.(type|size).*$symb_(entry|ret)/) {
1326 $l =~ s/$symb(_entry|_ret)/${symb}_info/g;
1330 next if $l =~ /^\s*\..*$symb.*\n?/;
1333 $c = join("\n",@o) . "\n";
1336 print OUTASM $T_HDR_entry;
1338 &print_doctored($c, 1); # NB: the 1!!!
1340 $chkcat[$entrychk{$symb}] = 'DONE ALREADY';
1343 } elsif ( $chkcat[$i] eq 'vector' ) {
1344 $symb = $chksymb[$i];
1347 if ( defined($vectorchk{$symb}) ) {
1348 print OUTASM $T_HDR_vector;
1349 print OUTASM &rev_tbl($symb, $chk[$vectorchk{$symb}], 0);
1351 # direct return code will be put here!
1352 $chkcat[$vectorchk{$symb}] = 'DONE ALREADY';
1354 } elsif ( $TargetPlatform =~ /^alpha-/ ) {
1355 # Alphas: the commented nop is for the splitter, to ensure
1356 # that no module ends with a label as the very last
1357 # thing. (The linker will adjust the label to point
1358 # to the first code word of the next module linked in,
1359 # even if alignment constraints cause the label to move!)
1361 print OUTASM "\t# nop\n";
1364 } elsif ( $chkcat[$i] eq 'rodata' ) {
1365 print OUTASM $T_HDR_rodata;
1366 print OUTASM $chk[$i];
1367 $chkcat[$i] = 'DONE ALREADY';
1368 } elsif ( $chkcat[$i] eq 'relrodata' ) {
1369 print OUTASM $T_HDR_relrodata;
1370 print OUTASM $chk[$i];
1371 $chkcat[$i] = 'DONE ALREADY';
1372 } elsif ( $chkcat[$i] eq 'toc' ) {
1373 # silly optimisation to print tocs, since they come in groups...
1374 print OUTASM $T_HDR_toc;
1376 while ($chkcat[$j] eq 'toc')
1377 { if ( $chk[$j] !~ /\.tc UpdatePAP\[TC\]/ # not needed: always turned into a jump.
1380 print OUTASM $chk[$j];
1382 $chkcat[$j] = 'DONE ALREADY';
1386 } elsif ( $TargetPlatform =~ /^.*-apple-darwin.*/ && $chkcat[$i] eq 'dyld' ) {
1387 # apple-darwin: dynamic linker stubs
1388 if($chk[$i] !~ /\.indirect_symbol ___DISCARD__/)
1389 { # print them out unchanged, but remove the stubs for __DISCARD__
1390 print OUTASM $chk[$i];
1392 } elsif ( $TargetPlatform =~ /^i386-apple-darwin.*/ && $chkcat[$i] eq 'get_pc_thunk' ) {
1393 # i386-apple-darwin: __i686.get_pc_thunk.[abcd]x
1394 print OUTASM ".section __TEXT,__textcoal_nt,coalesced,no_toc\n";
1395 print OUTASM $chk[$i];
1397 &tidy_up_and_die(1,"$Pgm: unknown chkcat (ghc-asm: $TargetPlatform)\n$chkcat[$i]\n$chk[$i]\n");
1401 print OUTASM $EXTERN_DECLS if $TargetPlatform =~ /^mips-/;
1404 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1405 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1410 sub hppa_mash_prologue { # OK, epilogue, too
1413 # toss all prologue stuff
1414 s/^\s+\.ENTRY[^\0]*--- BEGIN ---/\t.ENTRY/;
1416 # Lie about our .CALLINFO
1417 s/^\s+\.CALLINFO.*$/\t.CALLINFO NO_CALLS,NO_UNWIND/;
1424 # toss all epilogue stuff
1425 s/^\s+--- END ---[^\0]*\.EXIT/\t.EXIT/;
1427 # Sorry; we moved the _info stuff to the code segment.
1428 s/_info,DATA/_info,CODE/g;
1435 sub print_doctored {
1436 local($_, $need_fallthru_patch) = @_;
1438 if ( $TargetPlatform =~ /^x86_64-/ ) {
1441 # movq -4(%ebp), %rax
1446 s/^\tmovq\s+(-?\d*\(\%r(bx|bp|13)\)),\s*(\%r(ax|cx|dx|10|11))\n\tjmp\s+\*\3/\tjmp\t\*$1/g;
1447 s/^\tmovl\s+\$${T_US}(.*),\s*(\%e(ax|cx|si|di))\n\tjmp\s+\*\%r\3/\tjmp\t$T_US$1/g;
1450 if ( $TargetPlatform !~ /^i386-/
1451 || ! /^\t[a-z]/ # no instructions in here, apparently
1452 || /^${T_US}__stginit_[A-Za-z0-9_]+${T_POST_LBL}/) {
1457 # OK, must do some x86 **HACKING**
1459 local($entry_patch) = '';
1460 local($exit_patch) = '';
1462 # gotta watch out for weird instructions that
1463 # invisibly smash various regs:
1464 # rep* %ecx used for counting
1465 # scas* %edi used for destination index
1466 # cmps* %e[sd]i used for indices
1467 # loop* %ecx used for counting
1472 # * use of STG reg [ nn(%ebx) ] where no machine reg avail
1474 # * GCC used an "STG reg" for its own purposes
1476 # * some secret uses of machine reg, requiring STG reg
1477 # to be saved/restored
1479 # The most dangerous "GCC uses" of an "STG reg" are when
1480 # the reg holds the target of a jmp -- it's tricky to
1481 # insert the patch-up code before we get to the target!
1482 # So here we change the jmps:
1484 # --------------------------------------------------------
1485 # it can happen that we have jumps of the form...
1486 # jmp *<something involving %esp>
1488 # jmp <something involving another naughty register...>
1490 # a reasonably-common case is:
1492 # movl $_blah,<bad-reg>
1495 s/^\tmovl\s+\$${T_US}(.*),\s*(\%e[acd]x)\n\tjmp\s+\*\2/\tjmp $T_US$1/g;
1499 # movl -4(%ebx), %eax
1504 s/^\tmovl\s+(-?\d*\(\%e(bx|si)\)),\s*(\%e[acd]x)\n\tjmp\s+\*\3/\tjmp\t\*$1/g;
1506 if ($StolenX86Regs <= 2 ) { # YURGH! spurious uses of esi?
1507 s/^\tmovl\s+(.*),\s*\%esi\n\tjmp\s+\*%esi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1508 s/^\tjmp\s+\*(.*\(.*\%esi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1509 s/^\tjmp\s+\*\%esi\n/\tmovl \%esi,\%eax\n\tjmp \*\%eax\n/g;
1510 die "$Pgm: (mangler) still have jump involving \%esi!\n$_"
1511 if /(jmp|call)\s+.*\%esi/;
1513 if ($StolenX86Regs <= 3 ) { # spurious uses of edi?
1514 s/^\tmovl\s+(.*),\s*\%edi\n\tjmp\s+\*%edi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1515 s/^\tjmp\s+\*(.*\(.*\%edi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1516 s/^\tjmp\s+\*\%edi\n/\tmovl \%edi,\%eax\n\tjmp \*\%eax\n/g;
1517 die "$Pgm: (mangler) still have jump involving \%edi!\n$_"
1518 if /(jmp|call)\s+.*\%edi/;
1521 # OK, now we can decide what our patch-up code is going to
1524 # Offsets into register table - you'd better update these magic
1525 # numbers should you change its contents!
1526 # local($OFFSET_R1)=0; No offset for R1 in new RTS.
1527 local($OFFSET_Hp)=88;
1529 # Note funky ".=" stuff; we're *adding* to these _patch guys
1530 if ( $StolenX86Regs <= 2
1531 && ( /[^0-9]\(\%ebx\)/ || /\%esi/ || /^\tcmps/ ) ) { # R1 (esi)
1532 $entry_patch .= "\tmovl \%esi,(\%ebx)\n";
1533 $exit_patch .= "\tmovl (\%ebx),\%esi\n";
1535 # nothing for call_{entry,exit} because %esi is callee-save
1537 if ( $StolenX86Regs <= 3
1538 && ( /${OFFSET_Hp}\(\%ebx\)/ || /\%edi/ || /^\t(scas|cmps)/ ) ) { # Hp (edi)
1539 $entry_patch .= "\tmovl \%edi,${OFFSET_Hp}(\%ebx)\n";
1540 $exit_patch .= "\tmovl ${OFFSET_Hp}(\%ebx),\%edi\n";
1542 # nothing for call_{entry,exit} because %edi is callee-save
1545 # --------------------------------------------------------
1546 # next, here we go with non-%esp patching!
1548 s/^(\t[a-z])/$entry_patch$1/; # before first instruction
1550 # Before calling GC we must set up the exit condition before the call
1551 # and entry condition when we come back
1553 # fix _all_ non-local jumps:
1555 if ( $TargetPlatform =~ /^.*-apple-darwin.*/ ) {
1556 # On Darwin, we've got local-looking jumps that are
1557 # actually global (i.e. jumps to Lfoo$stub or via
1558 # Lfoo$non_lazy_ptr), so we fix those first.
1559 # In fact, we just fix everything that contains a dollar
1560 # because false positives don't hurt here.
1562 s/^(\tjmp\s+\*?L.*\$.*\n)/$exit_patch$1/g;
1565 s/^\tjmp\s+\*${T_X86_PRE_LLBL_PAT}/\tJMP___SL/go;
1566 s/^\tjmp\s+${T_X86_PRE_LLBL_PAT}/\tJMP___L/go;
1568 s/^(\tjmp\s+.*\n)/$exit_patch$1/g; # here's the fix...
1570 s/^\tJMP___SL/\tjmp \*${T_X86_PRE_LLBL}/go;
1571 s/^\tJMP___L/\tjmp ${T_X86_PRE_LLBL}/go;
1573 if ($StolenX86Regs == 2 ) {
1574 die "ARGH! Jump uses \%esi or \%edi with -monly-2-regs:\n$_"
1575 if /^\t(jmp|call)\s+.*\%e(si|di)/;
1576 } elsif ($StolenX86Regs == 3 ) {
1577 die "ARGH! Jump uses \%edi with -monly-3-regs:\n$_"
1578 if /^\t(jmp|call)\s+.*\%edi/;
1581 # --------------------------------------------------------
1582 # that's it -- print it
1584 #die "Funny jumps?\n$_" if /${T_X86_BADJMP}/o; # paranoia
1588 if ( $need_fallthru_patch ) { # exit patch for end of slow entry code
1589 print OUTASM $exit_patch;
1590 # ToDo: make it not print if there is a "jmp" at the end
1596 sub init_FUNNY_THINGS {
1597 %KNOWN_FUNNY_THING = (
1599 # "${T_US}stg_.*{T_POST_LBL}", 1,
1604 The following table reversal is used for both info tables and return
1605 vectors. In both cases, we remove the first entry from the table,
1606 reverse the table, put the label at the end, and paste some code
1607 (that which is normally referred to by the first entry in the table)
1608 right after the table itself. (The code pasting is done elsewhere.)
1612 local($symb, $tbl, $discard1) = @_;
1614 return ($tbl) if ($TargetPlatform =~ /^ia64-/);
1616 local($before) = '';
1618 local(@imports) = (); # hppa only
1621 local(@lines) = split(/\n/, $tbl);
1624 # Deal with the header...
1625 for ($i = 0; $i <= $#lines && $lines[$i] !~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1626 $label .= $lines[$i] . "\n",
1627 next if $lines[$i] =~ /^[A-Za-z0-9_]+_info${T_POST_LBL}$/o
1628 || $lines[$i] =~ /${T_DOT_GLOBAL}/o
1629 || $lines[$i] =~ /^${T_US}\S+_vtbl${T_POST_LBL}$/o;
1631 $before .= $lines[$i] . "\n"; # otherwise...
1635 $infoname =~ s/(.|\n)*^([A-Za-z0-9_]+_info)${T_POST_LBL}$(.|\n)*/\2/;
1637 # Grab the table data...
1638 if ( $TargetPlatform !~ /^hppa/ ) {
1639 for ( ; $i <= $#lines && $lines[$i] =~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1641 # Convert addresses of SRTs, slow entrypoints and large bitmaps
1642 # to offsets (relative to the info label),
1643 # in order to support position independent code.
1644 $line =~ s/$infoname/0/
1645 || $line =~ s/([A-Za-z0-9_]+_srtd)$/\1 - $infoname/
1646 || $line =~ s/([A-Za-z0-9_]+_srt(\+\d+)?)$/\1 - $infoname/
1647 || $line =~ s/([A-Za-z0-9_]+_slow)$/\1 - $infoname/
1648 || $line =~ s/([A-Za-z0-9_]+_btm)$/\1 - $infoname/
1649 || $line =~ s/([A-Za-z0-9_]+_alt)$/\1 - $infoname/
1650 || $line =~ s/([A-Za-z0-9_]+_dflt)$/\1 - $infoname/
1651 || $line =~ s/([A-Za-z0-9_]+_ret)$/\1 - $infoname/;
1652 push(@words, $line);
1654 } else { # hppa weirdness
1655 for ( ; $i <= $#lines && $lines[$i] =~ /^\s+(${T_DOT_WORD}|\.IMPORT)/; $i++) {
1656 # FIXME: the RTS now expects offsets instead of addresses
1657 # for all labels in info tables.
1658 if ($lines[$i] =~ /^\s+\.IMPORT/) {
1659 push(@imports, $lines[$i]);
1661 # We don't use HP's ``function pointers''
1662 # We just use labels in code space, like normal people
1663 $lines[$i] =~ s/P%//;
1664 push(@words, $lines[$i]);
1669 # Now throw away any initial zero word from the table. This is a hack
1670 # that lets us reduce the size of info tables when the SRT field is not
1671 # needed: see comments StgFunInfoTable in InfoTables.h.
1673 # The .zero business is for Linux/ELF.
1674 # The .skip business is for Sparc/Solaris/ELF.
1675 # The .blockz business is for HPPA.
1677 # if ($words[0] =~ /^\t?(${T_DOT_WORD}\s+0|\.zero\s+4|\.skip\s+4|\.blockz\s+4)/) {
1682 for (; $i <= $#lines; $i++) {
1683 $after .= $lines[$i] . "\n";
1686 # Alphas: If we have anonymous text (not part of a procedure), the
1687 # linker may complain about missing exception information. Bleh.
1688 # To suppress this, we place a .ent/.end pair around the code.
1689 # At the same time, we have to be careful and not enclose any leading
1690 # .file/.loc directives.
1691 if ( $TargetPlatform =~ /^alpha-/ && $label =~ /^([A-Za-z0-9_]+):$/) {
1692 local ($ident) = $1;
1693 $before =~ s/^((\s*\.(file|loc)\s+[^\n]*\n)*)/$1\t.ent $ident\n/;
1694 $after .= "\t.end $ident\n";
1697 # Alphas: The heroic Simon Marlow found a bug in the Digital UNIX
1698 # assembler (!) wherein .quad constants inside .text sections are
1699 # first narrowed to 32 bits then sign-extended back to 64 bits.
1700 # This obviously screws up our 64-bit bitmaps, so we work around
1701 # the bug by replacing .quad with .align 3 + .long + .long [ccshan]
1702 if ( $TargetPlatform =~ /^alpha-/ ) {
1704 if (/^\s*\.quad\s+([-+0-9].*\S)\s*$/ && length $1 >= 10) {
1705 local ($number) = $1;
1706 if ($number =~ /^([-+])?(0x?)?([0-9]+)$/) {
1707 local ($sign, $base, $digits) = ($1, $2, $3);
1708 $base = (10, 8, 16)[length $base];
1709 local ($hi, $lo) = (0, 0);
1710 foreach $i (split(//, $digits)) {
1711 $j = $lo * $base + $i;
1712 $lo = $j % 4294967296;
1713 $hi = $hi * $base + ($j - $lo) / 4294967296;
1715 ($hi, $lo) = (4294967295 - $hi, 4294967296 - $lo)
1717 $_ = "\t.align 3\n\t.long $lo\n\t.long $hi\n";
1718 # printf STDERR "TURNING %s into 0x %08x %08x\n", $number, $hi, $lo;
1720 print STDERR "Cannot handle \".quad $number\" in info table\n";
1728 . (($TargetPlatform !~ /^hppa/) ? '' : join("\n", @imports) . "\n")
1729 . join("\n", @words) . "\n"
1732 # print STDERR "before=$before\n";
1733 # print STDERR "label=$label\n";
1734 # print STDERR "words=",(reverse @words),"\n";
1735 # print STDERR "after=$after\n";
1741 The HP is a major nuisance. The threaded code mangler moved info
1742 tables from data space to code space, but unthreaded code in the RTS
1743 still has references to info tables in data space. Since the HP
1744 linker is very precise about where symbols live, we need to patch the
1745 references in the unthreaded RTS as well.
1748 sub mini_mangle_asm_hppa {
1749 local($in_asmf, $out_asmf) = @_;
1751 open(INASM, "< $in_asmf")
1752 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
1753 open(OUTASM,"> $out_asmf")
1754 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
1757 s/_info,DATA/_info,CODE/; # Move _info references to code space
1763 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1764 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1770 sub tidy_up_and_die {
1771 local($return_val, $msg) = @_;
1773 exit (($return_val == 0) ? 0 : 1);