1 %************************************************************************
3 \section[Driver-asm-fiddling]{Fiddling with assembler files}
5 %************************************************************************
10 Utterly stomp out C functions' prologues and epilogues; i.e., the
11 stuff to do with the C stack.
13 Any other required tidying up.
16 General note [chak]: Many regexps are very fragile because they rely on white
17 space being in the right place. This caused trouble with gcc 2.95 (at least
18 on Linux), where the use of white space in .s files generated by gcc suddenly
19 changed. To guarantee compatibility across different versions of gcc, make
20 sure (at least on i386-.*-linux) that regexps tolerate varying amounts of white
21 space between an assembler statement and its arguments as well as after a the
22 comma separating multiple arguments.
24 \emph{For the time being, I have corrected the regexps for i386-.*-linux. I
25 didn't touch all the regexps for other i386 platforms, as I don't have
26 a box to test these changes.}
31 The HP linker is very picky about symbols being in the appropriate
32 space (code vs. data). When we mangle the threaded code to put the
33 info tables just prior to the code, they wind up in code space
34 rather than data space. This means that references to *_info from
35 un-mangled parts of the RTS (e.g. unthreaded GC code) get
36 unresolved symbols. Solution: mini-mangler for .c files on HP. I
37 think this should really be triggered in the driver by a new -rts
38 option, so that user code doesn't get mangled inappropriately.
40 With reversed tables, jumps are to the _info label rather than to
41 the _entry label. The _info label is just an address in code
42 space, rather than an entry point with the descriptive blob we
43 talked about yesterday. As a result, you can't use the call-style
44 JMP_ macro. However, some JMP_ macros take _info labels as targets
45 and some take code entry points within the RTS. The latter won't
46 work with the goto-style JMP_ macro. Sigh. Solution: Use the goto
47 style JMP_ macro, and mangle some more assembly, changing all
48 "RP'literal" and "LP'literal" references to "R'literal" and
49 "L'literal," so that you get the real address of the code, rather
50 than the descriptive blob. Also change all ".word P%literal"
51 entries in info tables and vector tables to just ".word literal,"
52 for the same reason. Advantage: No more ridiculous call sequences.
55 %************************************************************************
57 \subsection{Top-level code}
59 %************************************************************************
62 $TargetPlatform = $TARGETPLATFORM;
64 ($Pgm = $0) =~ s|.*/||;
68 if ( $TargetPlatform =~ /^i386-/ ) {
72 $StolenX86Regs = $ARGV[2];
76 &mangle_asm($ifile,$ofile);
81 %************************************************************************
83 \subsection{Constants for various architectures}
85 %************************************************************************
88 sub init_TARGET_STUFF {
90 #--------------------------------------------------------#
91 if ( $TargetPlatform =~ /^alpha-.*-.*/ ) {
93 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
94 $T_US = ''; # _ if symbols have an underscore on the front
95 $T_PRE_APP = 'DONT THINK THIS APPLIES'; # regexp that says what comes before APP/NO_APP
96 $T_CONST_LBL = '^\$L?C(\d+):$'; # regexp for what such a lbl looks like
99 $T_MOVE_DIRVS = '^(\s*(\$.*\.\.ng:|\.align\s+\d+|\.(globl|ent)\s+\S+|\#.*|\.(file|loc)\s+\S+\s+\S+|\.text|\.r?data)\n)';
100 $T_COPY_DIRVS = '^\s*(\$.*\.\.ng:|\#|\.(file|globl|ent|loc))';
102 $T_DOT_WORD = '\.(long|quad|byte|word)';
103 $T_DOT_GLOBAL = '^\t\.globl';
104 $T_HDR_literal = "\.rdata\n\t\.align 3\n";
105 $T_HDR_misc = "\.text\n\t\.align 3\n";
106 $T_HDR_data = "\.data\n\t\.align 3\n";
107 $T_HDR_rodata = "\.rdata\n\t\.align 3\n";
108 $T_HDR_closure = "\.data\n\t\.align 3\n";
109 $T_HDR_info = "\.text\n\t\.align 3\n";
110 $T_HDR_entry = "\.text\n\t\.align 3\n";
111 $T_HDR_vector = "\.text\n\t\.align 3\n";
113 #--------------------------------------------------------#
114 } elsif ( $TargetPlatform =~ /^hppa/ ) {
116 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
117 $T_US = ''; # _ if symbols have an underscore on the front
118 $T_PRE_APP = 'DONT THINK THIS APPLIES'; # regexp that says what comes before APP/NO_APP
119 $T_CONST_LBL = '^L\$C(\d+)$'; # regexp for what such a lbl looks like
122 $T_MOVE_DIRVS = '^((\s+\.(IMPORT|EXPORT|PARAM).*|\s+\.align\s+\d+|\s+\.(SPACE|SUBSPA)\s+\S+|\s*)\n)';
123 $T_COPY_DIRVS = '^\s+\.(IMPORT|EXPORT)';
125 $T_DOT_WORD = '\.(blockz|word|half|byte)';
126 $T_DOT_GLOBAL = '^\s+\.EXPORT';
127 $T_HDR_literal = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$LIT\$\n";
128 $T_HDR_misc = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
129 $T_HDR_data = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
130 $T_HDR_rodata = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
131 $T_HDR_closure = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
132 $T_HDR_info = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
133 $T_HDR_entry = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
134 $T_HDR_vector = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
136 #--------------------------------------------------------#
137 } elsif ( $TargetPlatform =~ /^i386-.*-(linuxaout|freebsd2|nextstep3|cygwin32|mingw32)$/ ) {
138 # NeXT added but not tested. CaS
140 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
141 $T_US = '_'; # _ if symbols have an underscore on the front
142 $T_PRE_APP = '^#'; # regexp that says what comes before APP/NO_APP
143 $T_CONST_LBL = '^LC(\d+):$';
145 $T_X86_PRE_LLBL_PAT = 'L';
146 $T_X86_PRE_LLBL = 'L';
147 $T_X86_BADJMP = '^\tjmp [^L\*]';
149 $T_MOVE_DIRVS = '^(\s*(\.(p2)?align\s+\d+(,0x90)?|\.globl\s+\S+|\.text|\.data|\.stab[^n].*|\.type\s+.*|\.size\s+.*|\.lcomm.*)\n)';
150 $T_COPY_DIRVS = '\.(globl|stab|lcomm)';
151 $T_DOT_WORD = '\.(long|word|value|byte|space)';
152 $T_DOT_GLOBAL = '\.globl';
153 $T_HDR_literal = "\.text\n\t\.align 2\n";
154 $T_HDR_misc = "\.text\n\t\.align 2,0x90\n";
155 $T_HDR_data = "\.data\n\t\.align 2\n";
156 $T_HDR_rodata = "\.text\n\t\.align 2\n";
157 $T_HDR_closure = "\.data\n\t\.align 2\n";
158 $T_HDR_info = "\.text\n\t\.align 2\n"; # NB: requires padding
159 $T_HDR_entry = "\.text\n"; # no .align so we're right next to _info (arguably wrong...?)
160 $T_HDR_vector = "\.text\n\t\.align 2\n"; # NB: requires padding
162 #--------------------------------------------------------#
163 } elsif ( $TargetPlatform =~ /^i386-.*-(solaris2|linux|freebsd|netbsd|openbsd)$/ ) {
165 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
166 $T_US = ''; # _ if symbols have an underscore on the front
167 $T_PRE_APP = # regexp that says what comes before APP/NO_APP
168 ($TargetPlatform =~ /-(linux|freebsd|netbsd|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+\d+(,\s*0x90)?|\.globl\s+\S+|\.text|\.data|\.section\s+.*|\.type\s+.*|\.size\s+\S+\s*,\s*\d+|\.ident.*|\.local.*)\n)';
176 $T_COPY_DIRVS = '^\s*\.(globl|type|size|local)';
178 $T_DOT_WORD = '\.(long|value|word|byte|zero)';
179 $T_DOT_GLOBAL = '\.globl';
180 $T_HDR_literal = "\.section\t\.rodata\n"; # or just use .text??? (WDP 95/11)
181 $T_HDR_misc = "\.text\n\t\.align 4\n";
182 $T_HDR_data = "\.data\n\t\.align 4\n";
183 $T_HDR_rodata = "\.section\t\.rodata\n\t\.align 4\n";
184 $T_HDR_closure = "\.data\n\t\.align 4\n";
185 $T_HDR_info = "\.text\n\t\.align 4\n";
186 $T_HDR_entry = "\.text\n"; # no .align so we're right next to _info (arguably wrong...?)
187 $T_HDR_vector = "\.text\n\t\.align 4\n"; # NB: requires padding
189 #--------------------------------------------------------#
190 } elsif ( $TargetPlatform =~ /^ia64-.*-linux$/ ) {
192 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
193 $T_US = ''; # _ if symbols have an underscore on the front
195 $T_CONST_LBL = '^\.LC(\d+):$'; # regexp for what such a lbl looks like
198 $T_MOVE_DIRVS = '^(\s*\.(global|proc|pred\.safe_across_calls|text|data|section|subsection|align|size|type|ident)\s+.*\n)';
199 $T_COPY_DIRVS = '\.(global|proc)';
201 $T_DOT_WORD = '\.(long|value|byte|zero)';
202 $T_DOT_GLOBAL = '\.global';
203 $T_HDR_literal = "\.section\t\.rodata\n";
204 $T_HDR_misc = "\.text\n\t\.align 8\n";
205 $T_HDR_data = "\.data\n\t\.align 8\n";
206 $T_HDR_rodata = "\.section\t\.rodata\n\t\.align 8\n";
207 $T_HDR_closure = "\.data\n\t\.align 8\n";
208 $T_HDR_info = "\.text\n\t\.align 8\n";
209 $T_HDR_entry = "\.text\n\t\.align 16\n";
210 $T_HDR_vector = "\.text\n\t\.align 8\n";
212 #--------------------------------------------------------#
213 } elsif ( $TargetPlatform =~ /^x86_64-.*-(linux|openbsd)$/ ) {
215 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
216 $T_US = ''; # _ if symbols have an underscore on the front
218 $T_CONST_LBL = '^\.LC(\d+):$'; # regexp for what such a lbl looks like
221 $T_MOVE_DIRVS = '^(\s*\.(globl|text|data|section|align|size|type|ident|local)\s+.*\n)';
222 $T_COPY_DIRVS = '\.(globl|local)';
224 $T_DOT_WORD = '\.(quad|long|value|byte|zero)';
225 $T_DOT_GLOBAL = '\.global';
226 $T_HDR_literal = "\.section\t\.rodata\n";
227 $T_HDR_misc = "\.text\n\t\.align 8\n";
228 $T_HDR_data = "\.data\n\t\.align 8\n";
229 $T_HDR_rodata = "\.section\t\.rodata\n\t\.align 8\n";
230 $T_HDR_closure = "\.data\n\t\.align 8\n";
231 $T_HDR_info = "\.text\n\t\.align 8\n";
232 $T_HDR_entry = "\.text\n\t\.align 8\n";
233 $T_HDR_vector = "\.text\n\t\.align 8\n";
235 #--------------------------------------------------------#
236 } elsif ( $TargetPlatform =~ /^m68k-.*-sunos4/ ) {
238 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
239 $T_US = '_'; # _ if symbols have an underscore on the front
240 $T_PRE_APP = '^# MAY NOT APPLY'; # regexp that says what comes before APP/NO_APP
241 $T_CONST_LBL = '^LC(\d+):$';
244 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.proc\s+\d+|\.const|\.cstring|\.globl\s+\S+|\.text|\.data|\.even|\.stab[^n].*)\n)';
245 $T_COPY_DIRVS = '\.(globl|proc|stab)';
247 $T_DOT_WORD = '\.long';
248 $T_DOT_GLOBAL = '\.globl';
249 $T_HDR_literal = "\.text\n\t\.even\n";
250 $T_HDR_misc = "\.text\n\t\.even\n";
251 $T_HDR_data = "\.data\n\t\.even\n";
252 $T_HDR_rodata = "\.text\n\t\.even\n";
253 $T_HDR_closure = "\.data\n\t\.even\n";
254 $T_HDR_info = "\.text\n\t\.even\n";
255 $T_HDR_entry = "\.text\n\t\.even\n";
256 $T_HDR_vector = "\.text\n\t\.even\n";
258 #--------------------------------------------------------#
259 } elsif ( $TargetPlatform =~ /^mips-.*/ ) {
261 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
262 $T_US = ''; # _ if symbols have an underscore on the front
263 $T_PRE_APP = '^\s*#'; # regexp that says what comes before APP/NO_APP
264 $T_CONST_LBL = '^\$LC(\d+):$'; # regexp for what such a lbl looks like
267 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.(globl|ent)\s+\S+|\.text|\.r?data)\n)';
268 $T_COPY_DIRVS = '\.(globl|ent)';
270 $T_DOT_WORD = '\.word';
271 $T_DOT_GLOBAL = '^\t\.globl';
272 $T_HDR_literal = "\t\.rdata\n\t\.align 2\n";
273 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
274 $T_HDR_data = "\t\.data\n\t\.align 2\n";
275 $T_HDR_rodata = "\t\.rdata\n\t\.align 2\n";
276 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
277 $T_HDR_info = "\t\.text\n\t\.align 2\n";
278 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
279 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
281 #--------------------------------------------------------#
282 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ ) {
283 # Apple PowerPC Darwin/MacOS X.
284 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
285 $T_US = '_'; # _ if symbols have an underscore on the front
286 $T_PRE_APP = 'DOESNT APPLY'; # regexp that says what comes before APP/NO_APP
287 $T_CONST_LBL = '^\LC\d+:'; # regexp for what such a lbl looks like
290 $T_MOVE_DIRVS = '^(\s*(\.align \d+|\.text|\.data|\.const_data|\.cstring|\.non_lazy_symbol_pointer|\.const|\.static_const|\.literal4|\.literal8|\.static_data|\.globl \S+|\.section .*|\.lcomm.*)\n)';
291 $T_COPY_DIRVS = '\.(globl|lcomm)';
293 $T_DOT_WORD = '\.(long|short|byte|fill|space)';
294 $T_DOT_GLOBAL = '\.globl';
295 $T_HDR_toc = "\.toc\n";
296 $T_HDR_literal = "\t\.const_data\n\t\.align 2\n";
297 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
298 $T_HDR_data = "\t\.data\n\t\.align 2\n";
299 $T_HDR_rodata = "\t\.const_data\n\t\.align 2\n";
300 $T_HDR_closure = "\t\.const_data\n\t\.align 2\n";
301 $T_HDR_info = "\t\.text\n\t\.align 2\n";
302 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
303 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
305 #--------------------------------------------------------#
306 } elsif ( $TargetPlatform =~ /^powerpc-.*-linux/ ) {
308 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
309 $T_US = ''; # _ if symbols have an underscore on the front
310 $T_PRE_APP = '^#'; # regexp that says what comes before APP/NO_APP
311 $T_CONST_LBL = '^\.LC\d+:'; # regexp for what such a lbl looks like
314 $T_MOVE_DIRVS = '^(\s*(\.(p2)?align\s+\d+(,\s*0x90)?|\.globl\s+\S+|\.text|\.data|\.section\s+.*|\.type\s+.*|\.size\s+\S+\s*,\s*\d+|\.ident.*|\.local.*)\n)';
315 $T_COPY_DIRVS = '^\s*\.(globl|type|size|local)';
317 $T_DOT_WORD = '\.(long|short|byte|fill|space)';
318 $T_DOT_GLOBAL = '\.globl';
319 $T_HDR_toc = "\.toc\n";
320 $T_HDR_literal = "\t\.section\t.rodata\n\t\.align 2\n";
321 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
322 $T_HDR_data = "\t\.data\n\t\.align 2\n";
323 $T_HDR_rodata = "\t\.section\t.rodata\n\t\.align 2\n";
324 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
325 $T_HDR_info = "\t\.text\n\t\.align 2\n";
326 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
327 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
329 #--------------------------------------------------------#
330 } elsif ( $TargetPlatform =~ /^sparc-.*-(solaris2|openbsd)/ ) {
332 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
333 $T_US = ''; # _ if symbols have an underscore on the front
334 $T_PRE_APP = 'DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
335 $T_CONST_LBL = '^\.LLC(\d+):$'; # regexp for what such a lbl looks like
338 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.stab.*|\.section.*|\s+\.type.*|\s+\.size.*)\n)';
339 $T_COPY_DIRVS = '\.(global|proc|stab)';
341 $T_DOT_WORD = '\.(long|word|byte|half|skip|uahalf|uaword)';
342 $T_DOT_GLOBAL = '^\t\.global';
343 $T_HDR_literal = "\.text\n\t\.align 8\n";
344 $T_HDR_misc = "\.text\n\t\.align 4\n";
345 $T_HDR_data = "\.data\n\t\.align 8\n";
346 $T_HDR_rodata = "\.text\n\t\.align 4\n";
347 $T_HDR_closure = "\.data\n\t\.align 4\n";
348 $T_HDR_info = "\.text\n\t\.align 4\n";
349 $T_HDR_entry = "\.text\n\t\.align 4\n";
350 $T_HDR_vector = "\.text\n\t\.align 4\n";
352 #--------------------------------------------------------#
353 } elsif ( $TargetPlatform =~ /^sparc-.*-sunos4/ ) {
355 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
356 $T_US = '_'; # _ if symbols have an underscore on the front
357 $T_PRE_APP = '^# DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
358 $T_CONST_LBL = '^LC(\d+):$';
361 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.stab.*)\n)';
362 $T_COPY_DIRVS = '\.(global|proc|stab)';
364 $T_DOT_WORD = '\.word';
365 $T_DOT_GLOBAL = '^\t\.global';
366 $T_HDR_literal = "\.text\n\t\.align 8\n";
367 $T_HDR_misc = "\.text\n\t\.align 4\n";
368 $T_HDR_data = "\.data\n\t\.align 8\n";
369 $T_HDR_rodata = "\.text\n\t\.align 4\n";
370 $T_HDR_closure = "\.data\n\t\.align 4\n";
371 $T_HDR_info = "\.text\n\t\.align 4\n";
372 $T_HDR_entry = "\.text\n\t\.align 4\n";
373 $T_HDR_vector = "\.text\n\t\.align 4\n";
375 #--------------------------------------------------------#
376 } elsif ( $TargetPlatform =~ /^sparc-.*-linux/ ) {
377 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
378 $T_US = ''; # _ if symbols have an underscore on the front
379 $T_PRE_APP = '#'; # regexp that says what comes before APP/NO_APP
380 # Probably doesn't apply anyway
381 $T_CONST_LBL = '^\.LLC(\d+):$'; # regexp for what such a lbl looks like
384 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.seg|\.stab.*|\t?\.section.*|\s+\.type.*|\s+\.size.*)\n)';
385 $T_COPY_DIRVS = '\.(global|globl|proc|stab)';
387 $T_DOT_WORD = '\.(long|word|nword|xword|byte|half|short|skip|uahalf|uaword)';
388 $T_DOT_GLOBAL = '^\t\.global';
389 $T_HDR_literal = "\.text\n\t\.align 8\n";
390 $T_HDR_misc = "\.text\n\t\.align 4\n";
391 $T_HDR_data = "\.data\n\t\.align 8\n";
392 $T_HDR_rodata = "\.text\n\t\.align 4\n";
393 $T_HDR_closure = "\.data\n\t\.align 4\n";
394 $T_HDR_info = "\.text\n\t\.align 4\n";
395 $T_HDR_entry = "\.text\n\t\.align 4\n";
396 $T_HDR_vector = "\.text\n\t\.align 4\n";
398 #--------------------------------------------------------#
400 print STDERR "$Pgm: don't know how to mangle assembly language for: $TargetPlatform\n";
405 print STDERR "T_STABBY: $T_STABBY\n";
406 print STDERR "T_US: $T_US\n";
407 print STDERR "T_PRE_APP: $T_PRE_APP\n";
408 print STDERR "T_CONST_LBL: $T_CONST_LBL\n";
409 print STDERR "T_POST_LBL: $T_POST_LBL\n";
410 if ( $TargetPlatform =~ /^i386-/ ) {
411 print STDERR "T_X86_PRE_LLBL_PAT: $T_X86_PRE_LLBL_PAT\n";
412 print STDERR "T_X86_PRE_LLBL: $T_X86_PRE_LLBL\n";
413 print STDERR "T_X86_BADJMP: $T_X86_BADJMP\n";
415 print STDERR "T_MOVE_DIRVS: $T_MOVE_DIRVS\n";
416 print STDERR "T_COPY_DIRVS: $T_COPY_DIRVS\n";
417 print STDERR "T_DOT_WORD: $T_DOT_WORD\n";
418 print STDERR "T_HDR_literal: $T_HDR_literal\n";
419 print STDERR "T_HDR_misc: $T_HDR_misc\n";
420 print STDERR "T_HDR_data: $T_HDR_data\n";
421 print STDERR "T_HDR_rodata: $T_HDR_rodata\n";
422 print STDERR "T_HDR_closure: $T_HDR_closure\n";
423 print STDERR "T_HDR_info: $T_HDR_info\n";
424 print STDERR "T_HDR_entry: $T_HDR_entry\n";
425 print STDERR "T_HDR_vector: $T_HDR_vector\n";
431 %************************************************************************
433 \subsection{Mangle away}
435 %************************************************************************
439 local($in_asmf, $out_asmf) = @_;
441 # multi-line regexp matching:
446 &init_TARGET_STUFF();
447 &init_FUNNY_THINGS();
449 open(INASM, "< $in_asmf")
450 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
451 open(OUTASM,"> $out_asmf")
452 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
454 # read whole file, divide into "chunks":
455 # record some info about what we've found...
457 @chk = (); # contents of the chunk
458 $numchks = 0; # number of them
459 @chkcat = (); # what category of thing in each chunk
460 @chksymb = (); # what symbol(base) is defined in this chunk
461 %entrychk = (); # ditto, its entry code
462 %closurechk = (); # ditto, the (static) closure
463 %srtchk = (); # ditto, its SRT (for top-level things)
464 %infochk = (); # given a symbol base, say what chunk its info tbl is in
465 %vectorchk = (); # ditto, return vector table
466 $EXTERN_DECLS = ''; # .globl <foo> .text (MIPS only)
468 $i = 0; $chkcat[0] = 'misc'; $chk[0] = '';
471 tr/\r//d if $TargetPlatform =~ /-mingw32$/; # In case Perl doesn't convert line endings
472 next if $T_STABBY && /^\.stab.*${T_US}__stg_split_marker/o;
473 next if $T_STABBY && /^\.stab.*ghc.*c_ID/;
474 next if /^\t\.def.*endef$/;
475 next if /${T_PRE_APP}(NO_)?APP/o;
476 next if /^;/ && $TargetPlatform =~ /^hppa/;
478 next if /(^$|^\t\.file\t|^ # )/ && $TargetPlatform =~ /^(mips|ia64)-/;
480 if ( $TargetPlatform =~ /^mips-/
481 && /^\t\.(globl\S+\.text|comm\t)/ ) {
482 $EXTERN_DECLS .= $_ unless /(__DISCARD__|\b(PK_|ASSIGN_)(FLT|DBL)\b)/;
483 # Treat .comm variables as data. These show up in two (known) places:
485 # - the module_registered variable used in the __stginit fragment.
486 # even though these are declared static and initialised, gcc 3.3
487 # likes to make them .comm, presumably to save space in the
490 # - global variables used to pass arguments from C to STG in
491 # a foreign export. (is this still true? --SDM)
493 } elsif ( /^\t\.comm.*$/ ) {
495 $chkcat[$i] = 'data';
498 # Labels ending "_str": these are literal strings.
499 } elsif ( /^${T_US}([A-Za-z0-9_]+)_str${T_POST_LBL}$/ ) {
501 $chkcat[$i] = 'rodata';
504 } elsif ( /^\s+/ ) { # most common case first -- a simple line!
505 # duplicated from the bottom
509 } elsif ( /\.\.ng:$/ && $TargetPlatform =~ /^alpha-/ ) {
510 # Alphas: Local labels not to be confused with new chunks
513 # NB: all the rest start with a non-space
515 } elsif ( $TargetPlatform =~ /^mips-/
516 && /^\d+:/ ) { # a funny-looking very-local label
519 } elsif ( /$T_CONST_LBL/o ) {
521 $chkcat[$i] = 'literal';
524 } elsif ( /^${T_US}__stg_split_marker(\d*)${T_POST_LBL}$/o ) {
526 $chkcat[$i] = 'splitmarker';
529 } elsif ( /^${T_US}([A-Za-z0-9_]+)_info${T_POST_LBL}$/o ) {
532 $chkcat[$i] = 'infotbl';
533 $chksymb[$i] = $symb;
535 die "Info table already? $symb; $i\n" if defined($infochk{$symb});
537 $infochk{$symb} = $i;
539 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(entry|ret)${T_POST_LBL}$/o ) {
541 $chkcat[$i] = 'entry';
546 } elsif ( /^${T_US}([A-Za-z0-9_]+)_closure${T_POST_LBL}$/o ) {
548 $chkcat[$i] = 'closure';
551 $closurechk{$1} = $i;
553 } elsif ( /^${T_US}([A-Za-z0-9_]+)_srt${T_POST_LBL}$/o ) {
560 } elsif ( /^${T_US}([A-Za-z0-9_]+)_ct${T_POST_LBL}$/o ) {
562 $chkcat[$i] = 'data';
565 } elsif ( /^${T_US}(stg_ap_stack_entries|stg_stack_save_entries|stg_arg_bitmaps)${T_POST_LBL}$/o ) {
567 $chkcat[$i] = 'data';
570 } elsif ( /^(${T_US}__gnu_compiled_c|gcc2_compiled\.)${T_POST_LBL}/o ) {
573 } elsif ( /^${T_US}[A-Za-z0-9_]+\.\d+${T_POST_LBL}$/o
574 || /^${T_US}.*_CAT${T_POST_LBL}$/o # PROF: _entryname_CAT
575 || /^${T_US}.*_done${T_POST_LBL}$/o # PROF: _module_done
576 || /^${T_US}_module_registered${T_POST_LBL}$/o # PROF: _module_registered
579 $chkcat[$i] = 'data';
582 } elsif ( /^([A-Za-z0-9_]+)\s+\.comm/ && $TargetPlatform =~ /^hppa/ ) {
587 } elsif ( /^${T_US}([A-Za-z0-9_]+)_cc(s)?${T_POST_LBL}$/o ) {
588 # all CC_ symbols go in the data section...
590 $chkcat[$i] = 'data';
593 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(alt|dflt)${T_POST_LBL}$/o ) {
595 $chkcat[$i] = 'misc';
597 } elsif ( /^${T_US}([A-Za-z0-9_]+)_vtbl${T_POST_LBL}$/o ) {
599 $chkcat[$i] = 'vector';
604 } elsif ( $TargetPlatform =~ /^i386-.*-solaris2/
605 && /^[A-Za-z0-9][A-Za-z0-9_]*:/ ) {
606 # Some Solaris system headers contain function definitions (as
607 # opposed to mere prototypes), which end up in the .hc file when
608 # a Haskell module foreign imports the corresponding system
609 # functions (most notably stat()). We put them into the text
610 # segment. Note that this currently does not extend to function
611 # names starting with an underscore.
614 $chkcat[$i] = 'misc';
617 } elsif ( /^${T_US}[A-Za-z0-9_]/o
618 && ( $TargetPlatform !~ /^hppa/ # need to avoid local labels in this case
619 || ! /^L\$\d+$/ ) ) {
626 /^${T_US}stg_.*${T_POST_LBL}$/o # RTS internals
627 || /^${T_US}__stg_.*${T_POST_LBL}$/o # more RTS internals
628 || /^${T_US}__fexp_.*${T_POST_LBL}$/o # foreign export
629 || /^${T_US}.*_slow${T_POST_LBL}$/o # slow entry
630 || /^${T_US}__stginit.*${T_POST_LBL}$/o # __stginit<module>
631 || /^${T_US}.*_btm${T_POST_LBL}$/o # large bitmaps
632 || /^${T_US}.*_srtd${T_POST_LBL}$/o # large bitmaps
633 || /^${T_US}.*_fast${T_POST_LBL}$/o # primops
634 || /^${T_US}.*_closure_tbl${T_POST_LBL}$/o # closure tables
635 || /^_uname:/o # x86/Solaris2
637 $chkcat[$i] = 'misc';
639 print STDERR "Warning: retaining unknown function \`$thing' in output from C compiler\n";
640 $chkcat[$i] = 'unknown';
643 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && (
645 || /^\.section __TEXT,__picsymbol_stub1,.*/
646 || /^\.section __TEXT,__picsymbolstub1,.*/
648 || /^\.section __TEXT,__symbol_stub1,.*/
649 || /^\.section __TEXT,__symbolstub1,.*/
650 || /^\.lazy_symbol_pointer/
651 || /^\.non_lazy_symbol_pointer/ ))
654 $chkcat[$i] = 'dyld';
656 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && /^\.data/ && $chkcat[$i] eq 'dyld')
657 { # non_lazy_symbol_ptrs that point to local symbols
659 $chkcat[$i] = 'dyld';
661 } elsif ( $TargetPlatform =~ /^powerpc-.*-linux/ && /^\.LCTOC1 = /o ) {
662 # PowerPC Linux's large-model PIC (-fPIC) generates a gobal offset
663 # table "by hand". Be sure to copy it over.
664 # Note that this label and all entries in the table should actually
665 # go into the .got2 section, but it isn't easy to distinguish them
666 # from other constant literals (.LC\d+), so we just put everything
669 $chkcat[$i] = 'literal';
670 $chksymb[$i] = 'LCTOC1';
671 } else { # simple line (duplicated at the top)
676 $numchks = $#chk + 1;
678 # open CHUNKS, ">/tmp/chunks1" or die "Cannot open /tmp/chunks1: $!\n";
679 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
682 # the division into chunks is imperfect;
683 # we throw some things over the fence into the next
686 # also, there are things we would like to know
687 # about the whole module before we start spitting
690 local($FIRST_MANGLABLE) = ($TargetPlatform =~ /^(alpha-|hppa|mips-)/) ? 1 : 0;
691 local($FIRST_TOSSABLE ) = ($TargetPlatform =~ /^(hppa|mips-)/) ? 1 : 0;
693 # print STDERR "first chunk to mangle: $FIRST_MANGLABLE\n";
695 # Alphas: NB: we start meddling at chunk 1, not chunk 0
696 # The first ".rdata" is quite magical; as of GCC 2.7.x, it
697 # spits a ".quad 0" in after the very first ".rdata"; we
698 # detect this special case (tossing the ".quad 0")!
699 local($magic_rdata_seen) = 0;
701 # HPPAs, MIPSen: also start medding at chunk 1
703 for ($i = $FIRST_TOSSABLE; $i < $numchks; $i++) {
704 $c = $chk[$i]; # convenience copy
706 # print STDERR "\nCHK $i (BEFORE) (",$chkcat[$i],"):\n", $c;
708 # toss all prologue stuff; HPPA is pretty weird
710 $c = &hppa_mash_prologue($c) if $TargetPlatform =~ /^hppa-/;
712 # be slightly paranoid to make sure there's
713 # nothing surprising in there
714 if ( $c =~ /--- BEGIN ---/ ) {
715 if (($p, $r) = split(/--- BEGIN ---/, $c)) {
717 # remove junk whitespace around the split point
721 if ($TargetPlatform =~ /^i386-/) {
722 $p =~ s/^\tpushl\s+\%edi\n//;
723 $p =~ s/^\tpushl\s+\%esi\n//;
724 $p =~ s/^\tpushl\s+\%ebx\n//;
725 $p =~ s/^\tmovl\s+\%esi,\s*\d*\(\%esp\)\n//;
726 $p =~ s/^\tmovl\s+\%edi,\s*\d*\(\%esp\)\n//;
727 $p =~ s/^\tsubl\s+\$\d+,\s*\%esp\n//;
728 $p =~ s/^\tmovl\s+\$\d+,\s*\%eax\n\tcall\s+__alloca\n// if ($TargetPlatform =~ /^.*-cygwin32/);
730 # GCC 3.1 is in the habit of adding spurious writes to the
731 # stack in the prologue. Just to be on the safe side,
732 # chuck these over the fence into the main code.
733 while ($p =~ /^\tmovl\s+\$\d+,\s*\d*\(\%esp\)\n/) {
734 # print "Spurious instruction: $&";
739 } elsif ($TargetPlatform =~ /^x86_64-/) {
740 $p =~ s/^\tpushq\s+\%r(bx|bp|12|13|14)\n//g;
741 $p =~ s/^\tmovq\s+\%r(bx|bp|12|13|14),\s*\d*\(\%rsp\)\n//g;
742 $p =~ s/^\tsubq\s+\$\d+,\s*\%rsp\n//;
744 } elsif ($TargetPlatform =~ /^ia64-/) {
745 $p =~ s/^\t\.prologue .*\n//;
746 $p =~ s/^\t\.save ar\.pfs, r\d+\n\talloc r\d+ = ar\.pfs, 0, 3[12], \d+, 0\n//;
747 $p =~ s/^\t\.fframe \d+\n\tadds r12 = -\d+, r12\n//;
748 $p =~ s/^\t\.save rp, r\d+\n\tmov r\d+ = b0\n//;
749 $p =~ s/^\t\.(mii|mmi)\n//g; # bundling is no longer sensible
750 $p =~ s/^\t;;\n//g; # discard stops
751 $p =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
753 # GCC 3.3 saves r1 in the prologue, move this to the body
754 if ($p =~ /^\tmov r\d+ = r1\n/) {
758 } elsif ($TargetPlatform =~ /^m68k-/) {
759 $p =~ s/^\tlink a6,#-?\d.*\n//;
760 $p =~ s/^\tpea a6@\n\tmovel sp,a6\n//;
761 # The above showed up in the asm code,
762 # so I added it here.
763 # I hope it's correct.
765 $p =~ s/^\tmovel d2,sp\@-\n//;
766 $p =~ s/^\tmovel d5,sp\@-\n//; # SMmark.* only?
767 $p =~ s/^\tmoveml \#0x[0-9a-f]+,sp\@-\n//; # SMmark.* only?
768 } elsif ($TargetPlatform =~ /^mips-/) {
769 # the .frame/.mask/.fmask that we use is the same
770 # as that produced by GCC for miniInterpret; this
771 # gives GDB some chance of figuring out what happened
772 $FRAME = "\t.frame\t\$sp,2168,\$31\n\t.mask\t0x90000000,-4\n\t.fmask\t0x00000000,0\n";
773 $p =~ s/^\t\.(frame).*\n/__FRAME__/g;
774 $p =~ s/^\t\.(mask|fmask).*\n//g;
775 $p =~ s/^\t\.cprestore.*\n/\t\.cprestore 416\n/; # 16 + 100 4-byte args
776 $p =~ s/^\tsubu\t\$sp,\$sp,\d+\n//;
777 $p =~ s/^\tsw\t\$31,\d+\(\$sp\)\n//;
778 $p =~ s/^\tsw\t\$fp,\d+\(\$sp\)\n//;
779 $p =~ s/^\tsw\t\$28,\d+\(\$sp\)\n//;
780 $p =~ s/__FRAME__/$FRAME/;
781 } elsif ($TargetPlatform =~ /^powerpc-apple-.*/) {
783 $pcrel_label =~ s/(.|\n)*^(\"?L\d+\$pb\"?):\n(.|\n)*/$2/ or $pcrel_label = "";
785 $p =~ s/^\tmflr r0\n//;
786 $p =~ s/^\tbl saveFP # f\d+\n//;
787 $p =~ s/^\tbl saveFP ; save f\d+-f\d+\n//;
788 $p =~ s/^\"?L\d+\$pb\"?:\n//;
789 $p =~ s/^\tstmw r\d+,-\d+\(r1\)\n//;
790 $p =~ s/^\tstfd f\d+,-\d+\(r1\)\n//g;
791 $p =~ s/^\tstw r0,\d+\(r1\)\n//g;
792 $p =~ s/^\tstwu r1,-\d+\(r1\)\n//;
793 $p =~ s/^\tstw r\d+,-\d+\(r1\)\n//g;
794 $p =~ s/^\tbcl 20,31,L\d+\$pb\n//;
795 $p =~ s/^L\d+\$pb:\n//;
796 $p =~ s/^\tmflr r31\n//;
798 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
799 # under some circumstances, only when generating position dependent code.
800 # I have no idea why, and I don't think it is necessary, so let's toss it.
801 $p =~ s/^\tli r\d+,0\n//g;
802 $p =~ s/^\tstw r\d+,\d+\(r1\)\n//g;
803 } elsif ($TargetPlatform =~ /^powerpc-.*-linux/) {
804 $p =~ s/^\tmflr 0\n//;
805 $p =~ s/^\tstmw \d+,\d+\(1\)\n//;
806 $p =~ s/^\tstfd \d+,\d+\(1\)\n//g;
807 $p =~ s/^\tstw r0,8\(1\)\n//;
808 $p =~ s/^\tstwu 1,-\d+\(1\)\n//;
809 $p =~ s/^\tstw \d+,\d+\(1\)\n//g;
811 # GCC's "large-model" PIC (-fPIC)
813 $pcrel_label =~ s/(.|\n)*^.LCF(\d+):\n(.|\n)*/$2/ or $pcrel_label = "";
815 $p =~ s/^\tbcl 20,31,.LCF\d+\n//;
816 $p =~ s/^.LCF\d+:\n//;
817 $p =~ s/^\tmflr 30\n//;
818 $p =~ s/^\tlwz 0,\.LCL\d+-\.LCF\d+\(30\)\n//;
819 $p =~ s/^\tadd 30,0,30\n//;
821 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
822 # under some circumstances, only when generating position dependent code.
823 # I have no idea why, and I don't think it is necessary, so let's toss it.
824 $p =~ s/^\tli \d+,0\n//g;
825 $p =~ s/^\tstw \d+,\d+\(1\)\n//g;
827 print STDERR "$Pgm: unknown prologue mangling? $TargetPlatform\n";
830 # HWL HACK: dont die, just print a warning
831 #print stderr "HWL: this should die! Prologue junk?: $p\n" if $p =~ /^\t[^\.]/;
832 die "Prologue junk?: $p\n" if $p =~ /^\s+[^\s\.]/;
834 # For PIC, we want to keep part of the prologue
835 if ($TargetPlatform =~ /^powerpc-apple-.*/ && $pcrel_label ne "") {
836 # Darwin: load the current instruction pointer into register r31
837 $p .= "bcl 20,31,$pcrel_label\n";
838 $p .= "$pcrel_label:\n";
839 $p .= "\tmflr r31\n";
840 } elsif ($TargetPlatform =~ /^powerpc-.*-linux/ && $pcrel_label ne "") {
841 # Linux: load the GOT pointer into register 30
842 $p .= "\tbcl 20,31,.LCF$pcrel_label\n";
843 $p .= ".LCF$pcrel_label:\n";
845 $p .= "\tlwz 0,.LCL$pcrel_label-.LCF$pcrel_label(30)\n";
846 $p .= "\tadd 30,0,30\n";
849 # glue together what's left
854 if ( $TargetPlatform =~ /^mips-/ ) {
855 # MIPS: first, this basic sequence may occur "--- END ---" or not
856 $c =~ s/^\tlw\t\$31,\d+\(\$sp\)\n\taddu\t\$sp,\$sp,\d+\n\tj\t\$31\n\t\.end/\t\.end/;
859 # toss all epilogue stuff; again, paranoidly
860 if ( $c =~ /--- END ---/ ) {
861 if (($r, $e) = split(/--- END ---/, $c)) {
862 if ($TargetPlatform =~ /^i386-/) {
864 $e =~ s/^\tpopl\s+\%edi\n//;
865 $e =~ s/^\tpopl\s+\%esi\n//;
866 $e =~ s/^\tpopl\s+\%edx\n//;
867 $e =~ s/^\tpopl\s+\%ecx\n//;
868 $e =~ s/^\taddl\s+\$\d+,\s*\%esp\n//;
869 $e =~ s/^\tsubl\s+\$-\d+,\s*\%esp\n//;
870 } elsif ($TargetPlatform =~ /^ia64-/) {
871 $e =~ s/^\tmov ar\.pfs = r\d+\n//;
872 $e =~ s/^\tmov b0 = r\d+\n//;
873 $e =~ s/^\t\.restore sp\n\tadds r12 = \d+, r12\n//;
874 $e =~ s/^\tbr\.ret\.sptk\.many b0\n//;
875 $e =~ s/^\t\.(mii|mmi|mib)\n//g; # bundling is no longer sensible
876 $e =~ s/^\t;;\n//g; # discard stops - stop at end of body is sufficient
877 $e =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
878 } elsif ($TargetPlatform =~ /^m68k-/) {
879 $e =~ s/^\tunlk a6\n//;
881 } elsif ($TargetPlatform =~ /^mips-/) {
882 $e =~ s/^\tlw\t\$31,\d+\(\$sp\)\n//;
883 $e =~ s/^\tlw\t\$fp,\d+\(\$sp\)\n//;
884 $e =~ s/^\taddu\t\$sp,\$sp,\d+\n//;
885 $e =~ s/^\tj\t\$31\n//;
886 } elsif ($TargetPlatform =~ /^powerpc-apple-.*/) {
887 $e =~ s/^\taddi r1,r1,\d+\n//;
888 $e =~ s/^\tlwz r\d+,\d+\(r1\)\n//;
889 $e =~ s/^\tlmw r\d+,-\d+\(r1\)\n//;
890 $e =~ s/^\tmtlr r0\n//;
892 $e =~ s/^\tb restFP ;.*\n//;
894 print STDERR "$Pgm: unknown epilogue mangling? $TargetPlatform\n";
897 print STDERR "WARNING: Epilogue junk?: $e\n" if $e =~ /^\t\s*[^\.\s\n]/;
899 # glue together what's left
901 $c =~ s/\n\t\n/\n/; # junk blank line
905 # On SPARCs, we don't do --- BEGIN/END ---, we just
906 # toss the register-windowing save/restore/ret* instructions
907 # directly unless they've been generated by function definitions in header
909 if ( $TargetPlatform =~ /^sparc-/ ) {
910 if ( ! ( $TargetPlatform =~ /solaris2$/ && $chkcat[$i] eq 'unknown' )) {
911 $c =~ s/^\t(save.*|restore.*|ret|retl)\n//g;
913 # throw away PROLOGUE comments
914 $c =~ s/^\t!#PROLOGUE# 0\n\t!#PROLOGUE# 1\n//;
917 # On Alphas, the prologue mangling is done a little later (below)
919 # toss all calls to __DISCARD__
920 $c =~ s/^\t(call|jbsr|jal)\s+${T_US}__DISCARD__\n//go;
921 $c =~ s/^\tjsr\s+\$26\s*,\s*${T_US}__DISCARD__\n//go if $TargetPlatform =~ /^alpha-/;
922 $c =~ s/^\tbl\s+L___DISCARD__\$stub\n//go if $TargetPlatform =~ /^powerpc-apple-.*/;
923 $c =~ s/^\tbl\s+__DISCARD__(\@plt)?\n//go if $TargetPlatform =~ /^powerpc-.*-linux/;
925 # IA64: mangle tailcalls into jumps here
926 if ($TargetPlatform =~ /^ia64-/) {
927 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/) {
928 # Eek, the gcc optimiser is getting smarter... if we see a jump to the --- TAILCALL ---
929 # marker then we reapply the substitution at the source sites
930 $c =~ s/^\tbr \.L$2\n/\t--- TAILCALL ---\n/g if ($2);
934 # MIPS: that may leave some gratuitous asm macros around
935 # (no harm done; but we get rid of them to be tidier)
936 $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/
937 if $TargetPlatform =~ /^mips-/;
939 # toss stack adjustment after DoSparks
940 $c =~ s/^(\tjbsr _DoSparks\n)\taddqw #8,sp/$1/g
941 if $TargetPlatform =~ /^m68k-/; # this looks old...
943 if ( $TargetPlatform =~ /^alpha-/ &&
944 ! $magic_rdata_seen &&
945 $c =~ /^\s*\.rdata\n\t\.quad 0\n\t\.align \d\n/ ) {
946 $c =~ s/^\s*\.rdata\n\t\.quad 0\n\t\.align (\d)\n/\.rdata\n\t\.align $1\n/;
947 $magic_rdata_seen = 1;
950 # pick some end-things and move them to the next chunk
952 # pin a funny end-thing on (for easier matching):
953 $c .= 'FUNNY#END#THING';
955 while ( $c =~ /${T_MOVE_DIRVS}FUNNY#END#THING/o ) {
959 # on x86 we try not to copy any directives into a literal
960 # chunk, rather we keep looking for the next real chunk. This
961 # is because we get things like
963 # .globl blah_closure
969 if ( $TargetPlatform =~ /^(i386|sparc|powerpc)/ && $to_move =~ /${T_COPY_DIRVS}/ ) {
971 while ( $j < $numchks && $chk[$j] =~ /$T_CONST_LBL/) {
974 if ( $j < $numchks ) {
975 $chk[$j] = $to_move . $chk[$j];
979 elsif ( $i < ($numchks - 1)
980 && ( $to_move =~ /${T_COPY_DIRVS}/
981 || ($TargetPlatform =~ /^hppa/ && $to_move =~ /align/ && $chkcat[$i+1] eq 'literal') )) {
982 $chk[$i + 1] = $to_move . $chk[$i + 1];
983 # otherwise they're tossed
986 $c =~ s/${T_MOVE_DIRVS}FUNNY#END#THING/FUNNY#END#THING/o;
989 if ( $TargetPlatform =~ /^alpha-/ && $c =~ /^\t\.ent\s+(\S+)/ ) {
991 # toss all prologue stuff, except for loading gp, and the ..ng address
992 unless ($c =~ /\.ent.*\n\$.*\.\.ng:/) {
993 if (($p, $r) = split(/^\t\.prologue/, $c)) {
994 if (($keep, $junk) = split(/\.\.ng:/, $p)) {
995 $keep =~ s/^\t\.frame.*\n/\t.frame \$30,0,\$26,0\n/;
996 $keep =~ s/^\t\.(mask|fmask).*\n//g;
997 $c = $keep . "..ng:\n";
999 print STDERR "malformed code block ($ent)?\n"
1002 $c .= "\t.prologue" . $r;
1006 $c =~ s/FUNNY#END#THING//;
1008 # print STDERR "\nCHK $i (AFTER) (",$chkcat[$i],"):\n", $c;
1010 $chk[$i] = $c; # update w/ convenience copy
1013 # open CHUNKS, ">/tmp/chunks2" or die "Cannot open /tmp/chunks2: $!\n";
1014 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
1017 if ( $TargetPlatform =~ /^alpha-/ ) {
1018 # print out the header stuff first
1019 $chk[0] =~ s/^(\t\.file.*)"(ghc\d+\.c)"/$1"$ifile_root.hc"/;
1020 print OUTASM $chk[0];
1022 } elsif ( $TargetPlatform =~ /^hppa/ ) {
1023 print OUTASM $chk[0];
1025 } elsif ( $TargetPlatform =~ /^mips-/ ) {
1026 $chk[0] = "\t\.file\t1 \"$ifile_root.hc\"\n" . $chk[0];
1028 # get rid of horrible "<dollar>Revision: .*$" strings
1029 local(@lines0) = split(/\n/, $chk[0]);
1031 while ( $z <= $#lines0 ) {
1032 if ( $lines0[$z] =~ /^\t\.byte\t0x24,0x52,0x65,0x76,0x69,0x73,0x69,0x6f$/ ) {
1035 while ( $z <= $#lines0 ) {
1037 last if $lines0[$z] =~ /[,\t]0x0$/;
1043 $chk[0] = join("\n", @lines0);
1044 $chk[0] =~ s/\n\n+/\n/;
1045 print OUTASM $chk[0];
1048 # print out all the literal strings next
1049 for ($i = 0; $i < $numchks; $i++) {
1050 if ( $chkcat[$i] eq 'literal' ) {
1051 print OUTASM $T_HDR_literal, $chk[$i];
1052 print OUTASM "; end literal\n" if $TargetPlatform =~ /^hppa/; # for the splitter
1054 $chkcat[$i] = 'DONE ALREADY';
1058 # on the HPPA, print out all the bss next
1059 if ( $TargetPlatform =~ /^hppa/ ) {
1060 for ($i = 1; $i < $numchks; $i++) {
1061 if ( $chkcat[$i] eq 'bss' ) {
1062 print OUTASM "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$BSS\$\n\t.align 4\n";
1063 print OUTASM $chk[$i];
1065 $chkcat[$i] = 'DONE ALREADY';
1070 for ($i = $FIRST_MANGLABLE; $i < $numchks; $i++) {
1071 # print STDERR "$i: cat $chkcat[$i], symb $chksymb[$i]\n";
1073 next if $chkcat[$i] eq 'DONE ALREADY';
1075 if ( $chkcat[$i] eq 'misc' || $chkcat[$i] eq 'unknown' ) {
1076 if ($chk[$i] ne '') {
1077 print OUTASM $T_HDR_misc;
1078 &print_doctored($chk[$i], 0);
1081 } elsif ( $chkcat[$i] eq 'toss' ) {
1082 print STDERR "*** NB: TOSSING code for $chksymb[$i] !!! ***\n";
1084 } elsif ( $chkcat[$i] eq 'data' ) {
1085 if ($chk[$i] ne '') {
1086 print OUTASM $T_HDR_data;
1087 print OUTASM $chk[$i];
1090 } elsif ( $chkcat[$i] eq 'splitmarker' ) {
1091 # we can just re-constitute this one...
1092 # NB: we emit _three_ underscores no matter what,
1093 # so ghc-split doesn't have to care.
1094 print OUTASM "___stg_split_marker",$chksymb[$i],"${T_POST_LBL}\n";
1096 } elsif ( $chkcat[$i] eq 'closure'
1097 || $chkcat[$i] eq 'srt'
1098 || $chkcat[$i] eq 'infotbl'
1099 || $chkcat[$i] eq 'entry') { # do them in that order
1100 $symb = $chksymb[$i];
1103 if ( defined($closurechk{$symb}) ) {
1104 print OUTASM $T_HDR_closure;
1105 print OUTASM $chk[$closurechk{$symb}];
1106 $chkcat[$closurechk{$symb}] = 'DONE ALREADY';
1110 if ( defined($srtchk{$symb}) ) {
1111 print OUTASM $T_HDR_rodata;
1112 print OUTASM $chk[$srtchk{$symb}];
1113 $chkcat[$srtchk{$symb}] = 'DONE ALREADY';
1117 if ( defined($infochk{$symb}) ) {
1119 print OUTASM $T_HDR_info;
1120 print OUTASM &rev_tbl($symb, $chk[$infochk{$symb}], 1);
1122 # entry code will be put here!
1124 $chkcat[$infochk{$symb}] = 'DONE ALREADY';
1128 if ( defined($entrychk{$symb}) ) {
1130 $c = $chk[$entrychk{$symb}];
1132 # If this is an entry point with an info table,
1133 # eliminate the entry symbol and all directives involving it.
1134 if (defined($infochk{$symb}) && $TargetPlatform !~ /^ia64-/) {
1135 $c =~ s/^.*$symb_(entry|ret)${T_POST_LBL}\n//;
1136 $c =~ s/^\s*\..*$symb.*\n//g;
1139 print OUTASM $T_HDR_entry;
1141 &print_doctored($c, 1); # NB: the 1!!!
1143 $chkcat[$entrychk{$symb}] = 'DONE ALREADY';
1146 } elsif ( $chkcat[$i] eq 'vector' ) {
1147 $symb = $chksymb[$i];
1150 if ( defined($vectorchk{$symb}) ) {
1151 print OUTASM $T_HDR_vector;
1152 print OUTASM &rev_tbl($symb, $chk[$vectorchk{$symb}], 0);
1154 # direct return code will be put here!
1155 $chkcat[$vectorchk{$symb}] = 'DONE ALREADY';
1157 } elsif ( $TargetPlatform =~ /^alpha-/ ) {
1158 # Alphas: the commented nop is for the splitter, to ensure
1159 # that no module ends with a label as the very last
1160 # thing. (The linker will adjust the label to point
1161 # to the first code word of the next module linked in,
1162 # even if alignment constraints cause the label to move!)
1164 print OUTASM "\t# nop\n";
1167 } elsif ( $chkcat[$i] eq 'rodata' ) {
1168 print OUTASM $T_HDR_rodata;
1169 print OUTASM $chk[$i];
1170 $chkcat[$i] = 'DONE ALREADY';
1172 } elsif ( $chkcat[$i] eq 'toc' ) {
1173 # silly optimisation to print tocs, since they come in groups...
1174 print OUTASM $T_HDR_toc;
1176 while ($chkcat[$j] eq 'toc')
1177 { if ( $chk[$j] !~ /\.tc UpdatePAP\[TC\]/ # not needed: always turned into a jump.
1180 print OUTASM $chk[$j];
1182 $chkcat[$j] = 'DONE ALREADY';
1186 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && $chkcat[$i] eq 'dyld' ) {
1187 # powerpc-apple: dynamic linker stubs
1188 if($chk[$i] !~ /\.indirect_symbol ___DISCARD__/)
1189 { # print them out unchanged, but remove the stubs for __DISCARD__
1190 print OUTASM $chk[$i];
1193 &tidy_up_and_die(1,"$Pgm: unknown chkcat (ghc-asm: $TargetPlatform)\n$chkcat[$i]\n$chk[$i]\n");
1197 print OUTASM $EXTERN_DECLS if $TargetPlatform =~ /^mips-/;
1200 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1201 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1206 sub hppa_mash_prologue { # OK, epilogue, too
1209 # toss all prologue stuff
1210 s/^\s+\.ENTRY[^\0]*--- BEGIN ---/\t.ENTRY/;
1212 # Lie about our .CALLINFO
1213 s/^\s+\.CALLINFO.*$/\t.CALLINFO NO_CALLS,NO_UNWIND/;
1220 # toss all epilogue stuff
1221 s/^\s+--- END ---[^\0]*\.EXIT/\t.EXIT/;
1223 # Sorry; we moved the _info stuff to the code segment.
1224 s/_info,DATA/_info,CODE/g;
1231 sub print_doctored {
1232 local($_, $need_fallthru_patch) = @_;
1234 if ( $TargetPlatform !~ /^i386-/
1235 || ! /^\t[a-z]/ # no instructions in here, apparently
1236 || /^${T_US}__stginit_[A-Za-z0-9_]+${T_POST_LBL}/) {
1240 # OK, must do some x86 **HACKING**
1242 local($entry_patch) = '';
1243 local($exit_patch) = '';
1245 # gotta watch out for weird instructions that
1246 # invisibly smash various regs:
1247 # rep* %ecx used for counting
1248 # scas* %edi used for destination index
1249 # cmps* %e[sd]i used for indices
1250 # loop* %ecx used for counting
1255 # * use of STG reg [ nn(%ebx) ] where no machine reg avail
1257 # * GCC used an "STG reg" for its own purposes
1259 # * some secret uses of machine reg, requiring STG reg
1260 # to be saved/restored
1262 # The most dangerous "GCC uses" of an "STG reg" are when
1263 # the reg holds the target of a jmp -- it's tricky to
1264 # insert the patch-up code before we get to the target!
1265 # So here we change the jmps:
1267 # --------------------------------------------------------
1268 # it can happen that we have jumps of the form...
1269 # jmp *<something involving %esp>
1271 # jmp <something involving another naughty register...>
1273 # a reasonably-common case is:
1275 # movl $_blah,<bad-reg>
1279 s/^\tmovl\s+\$${T_US}(.*),\s*(\%e[abcd]x)\n\tjmp\s+\*\2/\tjmp $T_US$1/g;
1281 if ($StolenX86Regs <= 2 ) { # YURGH! spurious uses of esi?
1282 s/^\tmovl\s+(.*),\s*\%esi\n\tjmp\s+\*%esi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1283 s/^\tjmp\s+\*(.*\(.*\%esi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1284 s/^\tjmp\s+\*\%esi\n/\tmovl \%esi,\%eax\n\tjmp \*\%eax\n/g;
1285 die "$Pgm: (mangler) still have jump involving \%esi!\n$_"
1286 if /(jmp|call)\s+.*\%esi/;
1288 if ($StolenX86Regs <= 3 ) { # spurious uses of edi?
1289 s/^\tmovl\s+(.*),\s*\%edi\n\tjmp\s+\*%edi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1290 s/^\tjmp\s+\*(.*\(.*\%edi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1291 s/^\tjmp\s+\*\%edi\n/\tmovl \%edi,\%eax\n\tjmp \*\%eax\n/g;
1292 die "$Pgm: (mangler) still have jump involving \%edi!\n$_"
1293 if /(jmp|call)\s+.*\%edi/;
1296 # OK, now we can decide what our patch-up code is going to
1299 # Offsets into register table - you'd better update these magic
1300 # numbers should you change its contents!
1301 # local($OFFSET_R1)=0; No offset for R1 in new RTS.
1302 local($OFFSET_Hp)=88;
1304 # Note funky ".=" stuff; we're *adding* to these _patch guys
1305 if ( $StolenX86Regs <= 2
1306 && ( /[^0-9]\(\%ebx\)/ || /\%esi/ || /^\tcmps/ ) ) { # R1 (esi)
1307 $entry_patch .= "\tmovl \%esi,(\%ebx)\n";
1308 $exit_patch .= "\tmovl (\%ebx),\%esi\n";
1310 # nothing for call_{entry,exit} because %esi is callee-save
1312 if ( $StolenX86Regs <= 3
1313 && ( /${OFFSET_Hp}\(\%ebx\)/ || /\%edi/ || /^\t(scas|cmps)/ ) ) { # Hp (edi)
1314 $entry_patch .= "\tmovl \%edi,${OFFSET_Hp}(\%ebx)\n";
1315 $exit_patch .= "\tmovl ${OFFSET_Hp}(\%ebx),\%edi\n";
1317 # nothing for call_{entry,exit} because %edi is callee-save
1320 # --------------------------------------------------------
1321 # next, here we go with non-%esp patching!
1323 s/^(\t[a-z])/$entry_patch$1/; # before first instruction
1325 # Before calling GC we must set up the exit condition before the call
1326 # and entry condition when we come back
1328 # fix _all_ non-local jumps:
1330 s/^\tjmp\s+\*${T_X86_PRE_LLBL_PAT}/\tJMP___SL/go;
1331 s/^\tjmp\s+${T_X86_PRE_LLBL_PAT}/\tJMP___L/go;
1333 s/^(\tjmp\s+.*\n)/$exit_patch$1/g; # here's the fix...
1335 s/^\tJMP___SL/\tjmp \*${T_X86_PRE_LLBL}/go;
1336 s/^\tJMP___L/\tjmp ${T_X86_PRE_LLBL}/go;
1338 if ($StolenX86Regs == 2 ) {
1339 die "ARGH! Jump uses \%esi or \%edi with -monly-2-regs:\n$_"
1340 if /^\t(jmp|call)\s+.*\%e(si|di)/;
1341 } elsif ($StolenX86Regs == 3 ) {
1342 die "ARGH! Jump uses \%edi with -monly-3-regs:\n$_"
1343 if /^\t(jmp|call)\s+.*\%edi/;
1346 # --------------------------------------------------------
1347 # that's it -- print it
1349 #die "Funny jumps?\n$_" if /${T_X86_BADJMP}/o; # paranoia
1353 if ( $need_fallthru_patch ) { # exit patch for end of slow entry code
1354 print OUTASM $exit_patch;
1355 # ToDo: make it not print if there is a "jmp" at the end
1361 sub init_FUNNY_THINGS {
1362 %KNOWN_FUNNY_THING = (
1364 # "${T_US}stg_.*{T_POST_LBL}", 1,
1369 The following table reversal is used for both info tables and return
1370 vectors. In both cases, we remove the first entry from the table,
1371 reverse the table, put the label at the end, and paste some code
1372 (that which is normally referred to by the first entry in the table)
1373 right after the table itself. (The code pasting is done elsewhere.)
1377 local($symb, $tbl, $discard1) = @_;
1379 return ($tbl) if ($TargetPlatform =~ /^ia64-/);
1381 local($before) = '';
1383 local(@imports) = (); # hppa only
1386 local(@lines) = split(/\n/, $tbl);
1389 # Deal with the header...
1390 for ($i = 0; $i <= $#lines && $lines[$i] !~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1391 $label .= $lines[$i] . "\n",
1392 next if $lines[$i] =~ /^[A-Za-z0-9_]+_info${T_POST_LBL}$/o
1393 || $lines[$i] =~ /${T_DOT_GLOBAL}/o
1394 || $lines[$i] =~ /^${T_US}\S+_vtbl${T_POST_LBL}$/o;
1396 $before .= $lines[$i] . "\n"; # otherwise...
1400 $infoname =~ s/(.|\n)*^([A-Za-z0-9_]+_info)${T_POST_LBL}$(.|\n)*/\2/;
1402 # Grab the table data...
1403 if ( $TargetPlatform !~ /^hppa/ ) {
1404 for ( ; $i <= $#lines && $lines[$i] =~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1406 # Convert addresses of SRTs, slow entrypoints and large bitmaps
1407 # to offsets (relative to the info label),
1408 # in order to support position independent code.
1409 $line =~ s/$infoname/0/
1410 || $line =~ s/([A-Za-z0-9_]+_srtd)$/\1 - $infoname/
1411 || $line =~ s/([A-Za-z0-9_]+_srt(\+\d+)?)$/\1 - $infoname/
1412 || $line =~ s/([A-Za-z0-9_]+_slow)$/\1 - $infoname/
1413 || $line =~ s/([A-Za-z0-9_]+_btm)$/\1 - $infoname/
1414 || $line =~ s/([A-Za-z0-9_]+_alt)$/\1 - $infoname/
1415 || $line =~ s/([A-Za-z0-9_]+_dflt)$/\1 - $infoname/
1416 || $line =~ s/([A-Za-z0-9_]+_ret)$/\1 - $infoname/;
1417 push(@words, $line);
1419 } else { # hppa weirdness
1420 for ( ; $i <= $#lines && $lines[$i] =~ /^\s+(${T_DOT_WORD}|\.IMPORT)/; $i++) {
1421 # FIXME: the RTS now expects offsets instead of addresses
1422 # for all labels in info tables.
1423 if ($lines[$i] =~ /^\s+\.IMPORT/) {
1424 push(@imports, $lines[$i]);
1426 # We don't use HP's ``function pointers''
1427 # We just use labels in code space, like normal people
1428 $lines[$i] =~ s/P%//;
1429 push(@words, $lines[$i]);
1434 # Now throw away any initial zero word from the table. This is a hack
1435 # that lets us reduce the size of info tables when the SRT field is not
1436 # needed: see comments StgFunInfoTable in InfoTables.h.
1438 # The .zero business is for Linux/ELF.
1439 # The .skip business is for Sparc/Solaris/ELF.
1440 # The .blockz business is for HPPA.
1442 # if ($words[0] =~ /^\t?(${T_DOT_WORD}\s+0|\.zero\s+4|\.skip\s+4|\.blockz\s+4)/) {
1447 for (; $i <= $#lines; $i++) {
1448 $after .= $lines[$i] . "\n";
1451 # Alphas: If we have anonymous text (not part of a procedure), the
1452 # linker may complain about missing exception information. Bleh.
1453 # To suppress this, we place a .ent/.end pair around the code.
1454 # At the same time, we have to be careful and not enclose any leading
1455 # .file/.loc directives.
1456 if ( $TargetPlatform =~ /^alpha-/ && $label =~ /^([A-Za-z0-9_]+):$/) {
1457 local ($ident) = $1;
1458 $before =~ s/^((\s*\.(file|loc)\s+[^\n]*\n)*)/$1\t.ent $ident\n/;
1459 $after .= "\t.end $ident\n";
1462 # Alphas: The heroic Simon Marlow found a bug in the Digital UNIX
1463 # assembler (!) wherein .quad constants inside .text sections are
1464 # first narrowed to 32 bits then sign-extended back to 64 bits.
1465 # This obviously screws up our 64-bit bitmaps, so we work around
1466 # the bug by replacing .quad with .align 3 + .long + .long [ccshan]
1467 if ( $TargetPlatform =~ /^alpha-/ ) {
1469 if (/^\s*\.quad\s+([-+0-9].*\S)\s*$/ && length $1 >= 10) {
1470 local ($number) = $1;
1471 if ($number =~ /^([-+])?(0x?)?([0-9]+)$/) {
1472 local ($sign, $base, $digits) = ($1, $2, $3);
1473 $base = (10, 8, 16)[length $base];
1474 local ($hi, $lo) = (0, 0);
1475 foreach $i (split(//, $digits)) {
1476 $j = $lo * $base + $i;
1477 $lo = $j % 4294967296;
1478 $hi = $hi * $base + ($j - $lo) / 4294967296;
1480 ($hi, $lo) = (4294967295 - $hi, 4294967296 - $lo)
1482 $_ = "\t.align 3\n\t.long $lo\n\t.long $hi\n";
1483 # printf STDERR "TURNING %s into 0x %08x %08x\n", $number, $hi, $lo;
1485 print STDERR "Cannot handle \".quad $number\" in info table\n";
1493 . (($TargetPlatform !~ /^hppa/) ? '' : join("\n", @imports) . "\n")
1494 . join("\n", @words) . "\n"
1497 # print STDERR "before=$before\n";
1498 # print STDERR "label=$label\n";
1499 # print STDERR "words=",(reverse @words),"\n";
1500 # print STDERR "after=$after\n";
1506 The HP is a major nuisance. The threaded code mangler moved info
1507 tables from data space to code space, but unthreaded code in the RTS
1508 still has references to info tables in data space. Since the HP
1509 linker is very precise about where symbols live, we need to patch the
1510 references in the unthreaded RTS as well.
1513 sub mini_mangle_asm_hppa {
1514 local($in_asmf, $out_asmf) = @_;
1516 open(INASM, "< $in_asmf")
1517 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
1518 open(OUTASM,"> $out_asmf")
1519 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
1522 s/_info,DATA/_info,CODE/; # Move _info references to code space
1528 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1529 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1535 sub tidy_up_and_die {
1536 local($return_val, $msg) = @_;
1538 exit (($return_val == 0) ? 0 : 1);