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 ( /^(${T_US}__gnu_compiled_c|gcc2_compiled\.)${T_POST_LBL}/o ) {
568 } elsif ( /^${T_US}[A-Za-z0-9_]+\.\d+${T_POST_LBL}$/o
569 || /^${T_US}.*_CAT${T_POST_LBL}$/o # PROF: _entryname_CAT
570 || /^${T_US}.*_done${T_POST_LBL}$/o # PROF: _module_done
571 || /^${T_US}_module_registered${T_POST_LBL}$/o # PROF: _module_registered
574 $chkcat[$i] = 'data';
577 } elsif ( /^([A-Za-z0-9_]+)\s+\.comm/ && $TargetPlatform =~ /^hppa/ ) {
582 } elsif ( /^${T_US}([A-Za-z0-9_]+)_cc(s)?${T_POST_LBL}$/o ) {
583 # all CC_ symbols go in the data section...
585 $chkcat[$i] = 'data';
588 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(alt|dflt)${T_POST_LBL}$/o ) {
590 $chkcat[$i] = 'misc';
592 } elsif ( /^${T_US}([A-Za-z0-9_]+)_vtbl${T_POST_LBL}$/o ) {
594 $chkcat[$i] = 'vector';
599 } elsif ( $TargetPlatform =~ /^i386-.*-solaris2/
600 && /^[A-Za-z0-9][A-Za-z0-9_]*:/ ) {
601 # Some Solaris system headers contain function definitions (as
602 # opposed to mere prototypes), which end up in the .hc file when
603 # a Haskell module foreign imports the corresponding system
604 # functions (most notably stat()). We put them into the text
605 # segment. Note that this currently does not extend to function
606 # names starting with an underscore.
609 $chkcat[$i] = 'misc';
612 } elsif ( /^${T_US}[A-Za-z0-9_]/o
613 && ( $TargetPlatform !~ /^hppa/ # need to avoid local labels in this case
614 || ! /^L\$\d+$/ ) ) {
621 /^${T_US}stg_.*${T_POST_LBL}$/o # RTS internals
622 || /^${T_US}__stg_.*${T_POST_LBL}$/o # more RTS internals
623 || /^${T_US}__fexp_.*${T_POST_LBL}$/o # foreign export
624 || /^${T_US}.*_slow${T_POST_LBL}$/o # slow entry
625 || /^${T_US}__stginit.*${T_POST_LBL}$/o # __stginit<module>
626 || /^${T_US}.*_btm${T_POST_LBL}$/o # large bitmaps
627 || /^${T_US}.*_srtd${T_POST_LBL}$/o # large bitmaps
628 || /^${T_US}.*_fast${T_POST_LBL}$/o # primops
629 || /^${T_US}.*_closure_tbl${T_POST_LBL}$/o # closure tables
630 || /^_uname:/o # x86/Solaris2
632 $chkcat[$i] = 'misc';
634 print STDERR "Warning: retaining unknown function \`$thing' in output from C compiler\n";
635 $chkcat[$i] = 'unknown';
638 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && (
640 || /^\.section __TEXT,__picsymbol_stub1,.*/
642 || /^\.section __TEXT,__symbol_stub1,.*/
643 || /^\.lazy_symbol_pointer/
644 || /^\.non_lazy_symbol_pointer/ ))
647 $chkcat[$i] = 'dyld';
649 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && /^\.data/ && $chkcat[$i] eq 'dyld')
650 { # non_lazy_symbol_ptrs that point to local symbols
652 $chkcat[$i] = 'dyld';
654 } else { # simple line (duplicated at the top)
659 $numchks = $#chk + 1;
661 # open CHUNKS, ">/tmp/chunks1" or die "Cannot open /tmp/chunks1: $!\n";
662 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
665 # the division into chunks is imperfect;
666 # we throw some things over the fence into the next
669 # also, there are things we would like to know
670 # about the whole module before we start spitting
673 local($FIRST_MANGLABLE) = ($TargetPlatform =~ /^(alpha-|hppa|mips-)/) ? 1 : 0;
674 local($FIRST_TOSSABLE ) = ($TargetPlatform =~ /^(hppa|mips-)/) ? 1 : 0;
676 # print STDERR "first chunk to mangle: $FIRST_MANGLABLE\n";
678 # Alphas: NB: we start meddling at chunk 1, not chunk 0
679 # The first ".rdata" is quite magical; as of GCC 2.7.x, it
680 # spits a ".quad 0" in after the very first ".rdata"; we
681 # detect this special case (tossing the ".quad 0")!
682 local($magic_rdata_seen) = 0;
684 # HPPAs, MIPSen: also start medding at chunk 1
686 for ($i = $FIRST_TOSSABLE; $i < $numchks; $i++) {
687 $c = $chk[$i]; # convenience copy
689 # print STDERR "\nCHK $i (BEFORE) (",$chkcat[$i],"):\n", $c;
691 # toss all prologue stuff; HPPA is pretty weird
693 $c = &hppa_mash_prologue($c) if $TargetPlatform =~ /^hppa-/;
695 # be slightly paranoid to make sure there's
696 # nothing surprising in there
697 if ( $c =~ /--- BEGIN ---/ ) {
698 if (($p, $r) = split(/--- BEGIN ---/, $c)) {
700 # remove junk whitespace around the split point
704 if ($TargetPlatform =~ /^i386-/) {
705 $p =~ s/^\tpushl\s+\%edi\n//;
706 $p =~ s/^\tpushl\s+\%esi\n//;
707 $p =~ s/^\tpushl\s+\%ebx\n//;
708 $p =~ s/^\tmovl\s+\%esi,\s*\d*\(\%esp\)\n//;
709 $p =~ s/^\tmovl\s+\%edi,\s*\d*\(\%esp\)\n//;
710 $p =~ s/^\tsubl\s+\$\d+,\s*\%esp\n//;
711 $p =~ s/^\tmovl\s+\$\d+,\s*\%eax\n\tcall\s+__alloca\n// if ($TargetPlatform =~ /^.*-cygwin32/);
713 # GCC 3.1 is in the habit of adding spurious writes to the
714 # stack in the prologue. Just to be on the safe side,
715 # chuck these over the fence into the main code.
716 while ($p =~ /^\tmovl\s+\$\d+,\s*\d*\(\%esp\)\n/) {
717 # print "Spurious instruction: $&";
722 } elsif ($TargetPlatform =~ /^x86_64-/) {
723 $p =~ s/^\tpushq\s+\%r(bx|bp|12|13|14)\n//g;
724 $p =~ s/^\tmovq\s+\%r(bx|bp|12|13|14),\s*\d*\(\%rsp\)\n//g;
725 $p =~ s/^\tsubq\s+\$\d+,\s*\%rsp\n//;
727 } elsif ($TargetPlatform =~ /^ia64-/) {
728 $p =~ s/^\t\.prologue .*\n//;
729 $p =~ s/^\t\.save ar\.pfs, r\d+\n\talloc r\d+ = ar\.pfs, 0, 3[12], \d+, 0\n//;
730 $p =~ s/^\t\.fframe \d+\n\tadds r12 = -\d+, r12\n//;
731 $p =~ s/^\t\.save rp, r\d+\n\tmov r\d+ = b0\n//;
732 $p =~ s/^\t\.(mii|mmi)\n//g; # bundling is no longer sensible
733 $p =~ s/^\t;;\n//g; # discard stops
734 $p =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
736 # GCC 3.3 saves r1 in the prologue, move this to the body
737 if ($p =~ /^\tmov r\d+ = r1\n/) {
741 } elsif ($TargetPlatform =~ /^m68k-/) {
742 $p =~ s/^\tlink a6,#-?\d.*\n//;
743 $p =~ s/^\tpea a6@\n\tmovel sp,a6\n//;
744 # The above showed up in the asm code,
745 # so I added it here.
746 # I hope it's correct.
748 $p =~ s/^\tmovel d2,sp\@-\n//;
749 $p =~ s/^\tmovel d5,sp\@-\n//; # SMmark.* only?
750 $p =~ s/^\tmoveml \#0x[0-9a-f]+,sp\@-\n//; # SMmark.* only?
751 } elsif ($TargetPlatform =~ /^mips-/) {
752 # the .frame/.mask/.fmask that we use is the same
753 # as that produced by GCC for miniInterpret; this
754 # gives GDB some chance of figuring out what happened
755 $FRAME = "\t.frame\t\$sp,2168,\$31\n\t.mask\t0x90000000,-4\n\t.fmask\t0x00000000,0\n";
756 $p =~ s/^\t\.(frame).*\n/__FRAME__/g;
757 $p =~ s/^\t\.(mask|fmask).*\n//g;
758 $p =~ s/^\t\.cprestore.*\n/\t\.cprestore 416\n/; # 16 + 100 4-byte args
759 $p =~ s/^\tsubu\t\$sp,\$sp,\d+\n//;
760 $p =~ s/^\tsw\t\$31,\d+\(\$sp\)\n//;
761 $p =~ s/^\tsw\t\$fp,\d+\(\$sp\)\n//;
762 $p =~ s/^\tsw\t\$28,\d+\(\$sp\)\n//;
763 $p =~ s/__FRAME__/$FRAME/;
764 } elsif ($TargetPlatform =~ /^powerpc-apple-.*/) {
766 $pcrel_label =~ s/(.|\n)*^(L\d+\$pb):\n(.|\n)*/$2/ or $pcrel_label = "";
768 $p =~ s/^\tmflr r0\n//;
769 $p =~ s/^\tbl saveFP # f\d+\n//;
770 $p =~ s/^\tbl saveFP ; save f\d+-f\d+\n//;
771 $p =~ s/^L\d+\$pb:\n//;
772 $p =~ s/^\tstmw r\d+,-\d+\(r1\)\n//;
773 $p =~ s/^\tstfd f\d+,-\d+\(r1\)\n//g;
774 $p =~ s/^\tstw r0,\d+\(r1\)\n//g;
775 $p =~ s/^\tstwu r1,-\d+\(r1\)\n//;
776 $p =~ s/^\tstw r\d+,-\d+\(r1\)\n//g;
777 $p =~ s/^\tbcl 20,31,L\d+\$pb\n//;
778 $p =~ s/^L\d+\$pb:\n//;
779 $p =~ s/^\tmflr r31\n//;
781 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
782 # under some circumstances, only when generating position dependent code.
783 # I have no idea why, and I don't think it is necessary, so let's toss it.
784 $p =~ s/^\tli r\d+,0\n//g;
785 $p =~ s/^\tstw r\d+,\d+\(r1\)\n//g;
786 } elsif ($TargetPlatform =~ /^powerpc-.*-linux/) {
787 $p =~ s/^\tmflr 0\n//;
788 $p =~ s/^\tstmw \d+,\d+\(1\)\n//;
789 $p =~ s/^\tstfd \d+,\d+\(1\)\n//g;
790 $p =~ s/^\tstw r0,8\(1\)\n//;
791 $p =~ s/^\tstwu 1,-\d+\(1\)\n//;
792 $p =~ s/^\tstw \d+,\d+\(1\)\n//g;
794 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
795 # under some circumstances, only when generating position dependent code.
796 # I have no idea why, and I don't think it is necessary, so let's toss it.
797 $p =~ s/^\tli \d+,0\n//g;
798 $p =~ s/^\tstw \d+,\d+\(1\)\n//g;
800 print STDERR "$Pgm: unknown prologue mangling? $TargetPlatform\n";
803 # HWL HACK: dont die, just print a warning
804 #print stderr "HWL: this should die! Prologue junk?: $p\n" if $p =~ /^\t[^\.]/;
805 die "Prologue junk?: $p\n" if $p =~ /^\s+[^\s\.]/;
807 if ($TargetPlatform =~ /^powerpc-apple-.*/ && $pcrel_label ne "") {
808 # on PowerPC, we have to keep a part of the prologue
809 # (which loads the current instruction pointer into register r31)
810 $p .= "bcl 20,31,$pcrel_label\n";
811 $p .= "$pcrel_label:\n";
812 $p .= "\tmflr r31\n";
815 # glue together what's left
820 if ( $TargetPlatform =~ /^mips-/ ) {
821 # MIPS: first, this basic sequence may occur "--- END ---" or not
822 $c =~ s/^\tlw\t\$31,\d+\(\$sp\)\n\taddu\t\$sp,\$sp,\d+\n\tj\t\$31\n\t\.end/\t\.end/;
825 # toss all epilogue stuff; again, paranoidly
826 if ( $c =~ /--- END ---/ ) {
827 if (($r, $e) = split(/--- END ---/, $c)) {
828 if ($TargetPlatform =~ /^i386-/) {
830 $e =~ s/^\tpopl\s+\%edi\n//;
831 $e =~ s/^\tpopl\s+\%esi\n//;
832 $e =~ s/^\tpopl\s+\%edx\n//;
833 $e =~ s/^\tpopl\s+\%ecx\n//;
834 $e =~ s/^\taddl\s+\$\d+,\s*\%esp\n//;
835 $e =~ s/^\tsubl\s+\$-\d+,\s*\%esp\n//;
836 } elsif ($TargetPlatform =~ /^ia64-/) {
837 $e =~ s/^\tmov ar\.pfs = r\d+\n//;
838 $e =~ s/^\tmov b0 = r\d+\n//;
839 $e =~ s/^\t\.restore sp\n\tadds r12 = \d+, r12\n//;
840 $e =~ s/^\tbr\.ret\.sptk\.many b0\n//;
841 $e =~ s/^\t\.(mii|mmi|mib)\n//g; # bundling is no longer sensible
842 $e =~ s/^\t;;\n//g; # discard stops - stop at end of body is sufficient
843 $e =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
844 } elsif ($TargetPlatform =~ /^m68k-/) {
845 $e =~ s/^\tunlk a6\n//;
847 } elsif ($TargetPlatform =~ /^mips-/) {
848 $e =~ s/^\tlw\t\$31,\d+\(\$sp\)\n//;
849 $e =~ s/^\tlw\t\$fp,\d+\(\$sp\)\n//;
850 $e =~ s/^\taddu\t\$sp,\$sp,\d+\n//;
851 $e =~ s/^\tj\t\$31\n//;
852 } elsif ($TargetPlatform =~ /^powerpc-apple-.*/) {
853 $e =~ s/^\taddi r1,r1,\d+\n//;
854 $e =~ s/^\tlwz r\d+,\d+\(r1\)\n//;
855 $e =~ s/^\tlmw r\d+,-\d+\(r1\)\n//;
856 $e =~ s/^\tmtlr r0\n//;
858 $e =~ s/^\tb restFP ;.*\n//;
860 print STDERR "$Pgm: unknown epilogue mangling? $TargetPlatform\n";
863 print STDERR "WARNING: Epilogue junk?: $e\n" if $e =~ /^\t\s*[^\.\s\n]/;
865 # glue together what's left
867 $c =~ s/\n\t\n/\n/; # junk blank line
871 # On SPARCs, we don't do --- BEGIN/END ---, we just
872 # toss the register-windowing save/restore/ret* instructions
873 # directly unless they've been generated by function definitions in header
875 if ( $TargetPlatform =~ /^sparc-/ ) {
876 if ( ! ( $TargetPlatform =~ /solaris2$/ && $chkcat[$i] eq 'unknown' )) {
877 $c =~ s/^\t(save.*|restore.*|ret|retl)\n//g;
879 # throw away PROLOGUE comments
880 $c =~ s/^\t!#PROLOGUE# 0\n\t!#PROLOGUE# 1\n//;
883 # On Alphas, the prologue mangling is done a little later (below)
885 # toss all calls to __DISCARD__
886 $c =~ s/^\t(call|jbsr|jal)\s+${T_US}__DISCARD__\n//go;
887 $c =~ s/^\tjsr\s+\$26\s*,\s*${T_US}__DISCARD__\n//go if $TargetPlatform =~ /^alpha-/;
888 $c =~ s/^\tbl\s+L___DISCARD__\$stub\n//go if $TargetPlatform =~ /^powerpc-apple-.*/;
889 $c =~ s/^\tbl\s+__DISCARD__\n//go if $TargetPlatform =~ /^powerpc-.*-linux/;
891 # IA64: mangle tailcalls into jumps here
892 if ($TargetPlatform =~ /^ia64-/) {
893 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/) {
894 # Eek, the gcc optimiser is getting smarter... if we see a jump to the --- TAILCALL ---
895 # marker then we reapply the substitution at the source sites
896 $c =~ s/^\tbr \.L$2\n/\t--- TAILCALL ---\n/g if ($2);
900 # MIPS: that may leave some gratuitous asm macros around
901 # (no harm done; but we get rid of them to be tidier)
902 $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/
903 if $TargetPlatform =~ /^mips-/;
905 # toss stack adjustment after DoSparks
906 $c =~ s/^(\tjbsr _DoSparks\n)\taddqw #8,sp/$1/g
907 if $TargetPlatform =~ /^m68k-/; # this looks old...
909 if ( $TargetPlatform =~ /^alpha-/ &&
910 ! $magic_rdata_seen &&
911 $c =~ /^\s*\.rdata\n\t\.quad 0\n\t\.align \d\n/ ) {
912 $c =~ s/^\s*\.rdata\n\t\.quad 0\n\t\.align (\d)\n/\.rdata\n\t\.align $1\n/;
913 $magic_rdata_seen = 1;
916 # pick some end-things and move them to the next chunk
918 # pin a funny end-thing on (for easier matching):
919 $c .= 'FUNNY#END#THING';
921 while ( $c =~ /${T_MOVE_DIRVS}FUNNY#END#THING/o ) {
925 # on x86 we try not to copy any directives into a literal
926 # chunk, rather we keep looking for the next real chunk. This
927 # is because we get things like
929 # .globl blah_closure
935 if ( $TargetPlatform =~ /^(i386|sparc|powerpc)/ && $to_move =~ /${T_COPY_DIRVS}/ ) {
937 while ( $j < $numchks && $chk[$j] =~ /$T_CONST_LBL/) {
940 if ( $j < $numchks ) {
941 $chk[$j] = $to_move . $chk[$j];
945 elsif ( $i < ($numchks - 1)
946 && ( $to_move =~ /${T_COPY_DIRVS}/
947 || ($TargetPlatform =~ /^hppa/ && $to_move =~ /align/ && $chkcat[$i+1] eq 'literal') )) {
948 $chk[$i + 1] = $to_move . $chk[$i + 1];
949 # otherwise they're tossed
952 $c =~ s/${T_MOVE_DIRVS}FUNNY#END#THING/FUNNY#END#THING/o;
955 if ( $TargetPlatform =~ /^alpha-/ && $c =~ /^\t\.ent\s+(\S+)/ ) {
957 # toss all prologue stuff, except for loading gp, and the ..ng address
958 unless ($c =~ /\.ent.*\n\$.*\.\.ng:/) {
959 if (($p, $r) = split(/^\t\.prologue/, $c)) {
960 if (($keep, $junk) = split(/\.\.ng:/, $p)) {
961 $keep =~ s/^\t\.frame.*\n/\t.frame \$30,0,\$26,0\n/;
962 $keep =~ s/^\t\.(mask|fmask).*\n//g;
963 $c = $keep . "..ng:\n";
965 print STDERR "malformed code block ($ent)?\n"
968 $c .= "\t.prologue" . $r;
972 $c =~ s/FUNNY#END#THING//;
974 # print STDERR "\nCHK $i (AFTER) (",$chkcat[$i],"):\n", $c;
976 $chk[$i] = $c; # update w/ convenience copy
979 # open CHUNKS, ">/tmp/chunks2" or die "Cannot open /tmp/chunks2: $!\n";
980 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
983 if ( $TargetPlatform =~ /^alpha-/ ) {
984 # print out the header stuff first
985 $chk[0] =~ s/^(\t\.file.*)"(ghc\d+\.c)"/$1"$ifile_root.hc"/;
986 print OUTASM $chk[0];
988 } elsif ( $TargetPlatform =~ /^hppa/ ) {
989 print OUTASM $chk[0];
991 } elsif ( $TargetPlatform =~ /^mips-/ ) {
992 $chk[0] = "\t\.file\t1 \"$ifile_root.hc\"\n" . $chk[0];
994 # get rid of horrible "<dollar>Revision: .*$" strings
995 local(@lines0) = split(/\n/, $chk[0]);
997 while ( $z <= $#lines0 ) {
998 if ( $lines0[$z] =~ /^\t\.byte\t0x24,0x52,0x65,0x76,0x69,0x73,0x69,0x6f$/ ) {
1001 while ( $z <= $#lines0 ) {
1003 last if $lines0[$z] =~ /[,\t]0x0$/;
1009 $chk[0] = join("\n", @lines0);
1010 $chk[0] =~ s/\n\n+/\n/;
1011 print OUTASM $chk[0];
1014 # print out all the literal strings next
1015 for ($i = 0; $i < $numchks; $i++) {
1016 if ( $chkcat[$i] eq 'literal' ) {
1017 print OUTASM $T_HDR_literal, $chk[$i];
1018 print OUTASM "; end literal\n" if $TargetPlatform =~ /^hppa/; # for the splitter
1020 $chkcat[$i] = 'DONE ALREADY';
1024 # on the HPPA, print out all the bss next
1025 if ( $TargetPlatform =~ /^hppa/ ) {
1026 for ($i = 1; $i < $numchks; $i++) {
1027 if ( $chkcat[$i] eq 'bss' ) {
1028 print OUTASM "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$BSS\$\n\t.align 4\n";
1029 print OUTASM $chk[$i];
1031 $chkcat[$i] = 'DONE ALREADY';
1036 for ($i = $FIRST_MANGLABLE; $i < $numchks; $i++) {
1037 # print STDERR "$i: cat $chkcat[$i], symb $chksymb[$i]\n";
1039 next if $chkcat[$i] eq 'DONE ALREADY';
1041 if ( $chkcat[$i] eq 'misc' || $chkcat[$i] eq 'unknown' ) {
1042 if ($chk[$i] ne '') {
1043 print OUTASM $T_HDR_misc;
1044 &print_doctored($chk[$i], 0);
1047 } elsif ( $chkcat[$i] eq 'toss' ) {
1048 print STDERR "*** NB: TOSSING code for $chksymb[$i] !!! ***\n";
1050 } elsif ( $chkcat[$i] eq 'data' ) {
1051 if ($chk[$i] ne '') {
1052 print OUTASM $T_HDR_data;
1053 print OUTASM $chk[$i];
1056 } elsif ( $chkcat[$i] eq 'splitmarker' ) {
1057 # we can just re-constitute this one...
1058 # NB: we emit _three_ underscores no matter what,
1059 # so ghc-split doesn't have to care.
1060 print OUTASM "___stg_split_marker",$chksymb[$i],"${T_POST_LBL}\n";
1062 } elsif ( $chkcat[$i] eq 'closure'
1063 || $chkcat[$i] eq 'srt'
1064 || $chkcat[$i] eq 'infotbl'
1065 || $chkcat[$i] eq 'entry') { # do them in that order
1066 $symb = $chksymb[$i];
1069 if ( defined($closurechk{$symb}) ) {
1070 print OUTASM $T_HDR_closure;
1071 print OUTASM $chk[$closurechk{$symb}];
1072 $chkcat[$closurechk{$symb}] = 'DONE ALREADY';
1076 if ( defined($srtchk{$symb}) ) {
1077 print OUTASM $T_HDR_rodata;
1078 print OUTASM $chk[$srtchk{$symb}];
1079 $chkcat[$srtchk{$symb}] = 'DONE ALREADY';
1083 if ( defined($infochk{$symb}) ) {
1085 print OUTASM $T_HDR_info;
1086 print OUTASM &rev_tbl($symb, $chk[$infochk{$symb}], 1);
1088 # entry code will be put here!
1090 $chkcat[$infochk{$symb}] = 'DONE ALREADY';
1094 if ( defined($entrychk{$symb}) ) {
1096 $c = $chk[$entrychk{$symb}];
1098 # If this is an entry point with an info table,
1099 # eliminate the entry symbol and all directives involving it.
1100 if (defined($infochk{$symb}) && $TargetPlatform !~ /^ia64-/) {
1101 $c =~ s/^.*$symb_(entry|ret)${T_POST_LBL}\n//;
1102 $c =~ s/^\s*\..*$symb.*\n//g;
1105 print OUTASM $T_HDR_entry;
1107 &print_doctored($c, 1); # NB: the 1!!!
1109 $chkcat[$entrychk{$symb}] = 'DONE ALREADY';
1112 } elsif ( $chkcat[$i] eq 'vector' ) {
1113 $symb = $chksymb[$i];
1116 if ( defined($vectorchk{$symb}) ) {
1117 print OUTASM $T_HDR_vector;
1118 print OUTASM &rev_tbl($symb, $chk[$vectorchk{$symb}], 0);
1120 # direct return code will be put here!
1121 $chkcat[$vectorchk{$symb}] = 'DONE ALREADY';
1123 } elsif ( $TargetPlatform =~ /^alpha-/ ) {
1124 # Alphas: the commented nop is for the splitter, to ensure
1125 # that no module ends with a label as the very last
1126 # thing. (The linker will adjust the label to point
1127 # to the first code word of the next module linked in,
1128 # even if alignment constraints cause the label to move!)
1130 print OUTASM "\t# nop\n";
1133 } elsif ( $chkcat[$i] eq 'rodata' ) {
1134 print OUTASM $T_HDR_rodata;
1135 print OUTASM $chk[$i];
1136 $chkcat[$i] = 'DONE ALREADY';
1138 } elsif ( $chkcat[$i] eq 'toc' ) {
1139 # silly optimisation to print tocs, since they come in groups...
1140 print OUTASM $T_HDR_toc;
1142 while ($chkcat[$j] eq 'toc')
1143 { if ( $chk[$j] !~ /\.tc UpdatePAP\[TC\]/ # not needed: always turned into a jump.
1146 print OUTASM $chk[$j];
1148 $chkcat[$j] = 'DONE ALREADY';
1152 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && $chkcat[$i] eq 'dyld' ) {
1153 # powerpc-apple: dynamic linker stubs
1154 if($chk[$i] !~ /\.indirect_symbol ___DISCARD__/)
1155 { # print them out unchanged, but remove the stubs for __DISCARD__
1156 print OUTASM $chk[$i];
1159 &tidy_up_and_die(1,"$Pgm: unknown chkcat (ghc-asm: $TargetPlatform)\n$chkcat[$i]\n$chk[$i]\n");
1163 print OUTASM $EXTERN_DECLS if $TargetPlatform =~ /^mips-/;
1166 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1167 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1172 sub hppa_mash_prologue { # OK, epilogue, too
1175 # toss all prologue stuff
1176 s/^\s+\.ENTRY[^\0]*--- BEGIN ---/\t.ENTRY/;
1178 # Lie about our .CALLINFO
1179 s/^\s+\.CALLINFO.*$/\t.CALLINFO NO_CALLS,NO_UNWIND/;
1186 # toss all epilogue stuff
1187 s/^\s+--- END ---[^\0]*\.EXIT/\t.EXIT/;
1189 # Sorry; we moved the _info stuff to the code segment.
1190 s/_info,DATA/_info,CODE/g;
1197 sub print_doctored {
1198 local($_, $need_fallthru_patch) = @_;
1200 if ( $TargetPlatform !~ /^i386-/
1201 || ! /^\t[a-z]/ # no instructions in here, apparently
1202 || /^${T_US}__stginit_[A-Za-z0-9_]+${T_POST_LBL}/) {
1206 # OK, must do some x86 **HACKING**
1208 local($entry_patch) = '';
1209 local($exit_patch) = '';
1211 # gotta watch out for weird instructions that
1212 # invisibly smash various regs:
1213 # rep* %ecx used for counting
1214 # scas* %edi used for destination index
1215 # cmps* %e[sd]i used for indices
1216 # loop* %ecx used for counting
1221 # * use of STG reg [ nn(%ebx) ] where no machine reg avail
1223 # * GCC used an "STG reg" for its own purposes
1225 # * some secret uses of machine reg, requiring STG reg
1226 # to be saved/restored
1228 # The most dangerous "GCC uses" of an "STG reg" are when
1229 # the reg holds the target of a jmp -- it's tricky to
1230 # insert the patch-up code before we get to the target!
1231 # So here we change the jmps:
1233 # --------------------------------------------------------
1234 # it can happen that we have jumps of the form...
1235 # jmp *<something involving %esp>
1237 # jmp <something involving another naughty register...>
1239 # a reasonably-common case is:
1241 # movl $_blah,<bad-reg>
1245 s/^\tmovl\s+\$${T_US}(.*),\s*(\%e[abcd]x)\n\tjmp\s+\*\2/\tjmp $T_US$1/g;
1247 if ($StolenX86Regs <= 2 ) { # YURGH! spurious uses of esi?
1248 s/^\tmovl\s+(.*),\s*\%esi\n\tjmp\s+\*%esi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1249 s/^\tjmp\s+\*(.*\(.*\%esi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1250 s/^\tjmp\s+\*\%esi\n/\tmovl \%esi,\%eax\n\tjmp \*\%eax\n/g;
1251 die "$Pgm: (mangler) still have jump involving \%esi!\n$_"
1252 if /(jmp|call)\s+.*\%esi/;
1254 if ($StolenX86Regs <= 3 ) { # spurious uses of edi?
1255 s/^\tmovl\s+(.*),\s*\%edi\n\tjmp\s+\*%edi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1256 s/^\tjmp\s+\*(.*\(.*\%edi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1257 s/^\tjmp\s+\*\%edi\n/\tmovl \%edi,\%eax\n\tjmp \*\%eax\n/g;
1258 die "$Pgm: (mangler) still have jump involving \%edi!\n$_"
1259 if /(jmp|call)\s+.*\%edi/;
1262 # OK, now we can decide what our patch-up code is going to
1265 # Offsets into register table - you'd better update these magic
1266 # numbers should you change its contents!
1267 # local($OFFSET_R1)=0; No offset for R1 in new RTS.
1268 local($OFFSET_Hp)=88;
1270 # Note funky ".=" stuff; we're *adding* to these _patch guys
1271 if ( $StolenX86Regs <= 2
1272 && ( /[^0-9]\(\%ebx\)/ || /\%esi/ || /^\tcmps/ ) ) { # R1 (esi)
1273 $entry_patch .= "\tmovl \%esi,(\%ebx)\n";
1274 $exit_patch .= "\tmovl (\%ebx),\%esi\n";
1276 # nothing for call_{entry,exit} because %esi is callee-save
1278 if ( $StolenX86Regs <= 3
1279 && ( /${OFFSET_Hp}\(\%ebx\)/ || /\%edi/ || /^\t(scas|cmps)/ ) ) { # Hp (edi)
1280 $entry_patch .= "\tmovl \%edi,${OFFSET_Hp}(\%ebx)\n";
1281 $exit_patch .= "\tmovl ${OFFSET_Hp}(\%ebx),\%edi\n";
1283 # nothing for call_{entry,exit} because %edi is callee-save
1286 # --------------------------------------------------------
1287 # next, here we go with non-%esp patching!
1289 s/^(\t[a-z])/$entry_patch$1/; # before first instruction
1291 # Before calling GC we must set up the exit condition before the call
1292 # and entry condition when we come back
1294 # fix _all_ non-local jumps:
1296 s/^\tjmp\s+\*${T_X86_PRE_LLBL_PAT}/\tJMP___SL/go;
1297 s/^\tjmp\s+${T_X86_PRE_LLBL_PAT}/\tJMP___L/go;
1299 s/^(\tjmp\s+.*\n)/$exit_patch$1/g; # here's the fix...
1301 s/^\tJMP___SL/\tjmp \*${T_X86_PRE_LLBL}/go;
1302 s/^\tJMP___L/\tjmp ${T_X86_PRE_LLBL}/go;
1304 if ($StolenX86Regs == 2 ) {
1305 die "ARGH! Jump uses \%esi or \%edi with -monly-2-regs:\n$_"
1306 if /^\t(jmp|call)\s+.*\%e(si|di)/;
1307 } elsif ($StolenX86Regs == 3 ) {
1308 die "ARGH! Jump uses \%edi with -monly-3-regs:\n$_"
1309 if /^\t(jmp|call)\s+.*\%edi/;
1312 # --------------------------------------------------------
1313 # that's it -- print it
1315 #die "Funny jumps?\n$_" if /${T_X86_BADJMP}/o; # paranoia
1319 if ( $need_fallthru_patch ) { # exit patch for end of slow entry code
1320 print OUTASM $exit_patch;
1321 # ToDo: make it not print if there is a "jmp" at the end
1327 sub init_FUNNY_THINGS {
1328 %KNOWN_FUNNY_THING = (
1330 # "${T_US}stg_.*{T_POST_LBL}", 1,
1335 The following table reversal is used for both info tables and return
1336 vectors. In both cases, we remove the first entry from the table,
1337 reverse the table, put the label at the end, and paste some code
1338 (that which is normally referred to by the first entry in the table)
1339 right after the table itself. (The code pasting is done elsewhere.)
1343 local($symb, $tbl, $discard1) = @_;
1345 return ($tbl) if ($TargetPlatform =~ /^ia64-/);
1347 local($before) = '';
1349 local(@imports) = (); # hppa only
1352 local(@lines) = split(/\n/, $tbl);
1355 # Deal with the header...
1356 for ($i = 0; $i <= $#lines && $lines[$i] !~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1357 $label .= $lines[$i] . "\n",
1358 next if $lines[$i] =~ /^[A-Za-z0-9_]+_info${T_POST_LBL}$/o
1359 || $lines[$i] =~ /${T_DOT_GLOBAL}/o
1360 || $lines[$i] =~ /^${T_US}\S+_vtbl${T_POST_LBL}$/o;
1362 $before .= $lines[$i] . "\n"; # otherwise...
1365 # Grab the table data...
1366 if ( $TargetPlatform !~ /^hppa/ ) {
1367 for ( ; $i <= $#lines && $lines[$i] =~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1368 push(@words, $lines[$i]);
1370 } else { # hppa weirdness
1371 for ( ; $i <= $#lines && $lines[$i] =~ /^\s+(${T_DOT_WORD}|\.IMPORT)/; $i++) {
1372 if ($lines[$i] =~ /^\s+\.IMPORT/) {
1373 push(@imports, $lines[$i]);
1375 # We don't use HP's ``function pointers''
1376 # We just use labels in code space, like normal people
1377 $lines[$i] =~ s/P%//;
1378 push(@words, $lines[$i]);
1383 # Now throw away any initial zero word from the table. This is a hack
1384 # that lets us reduce the size of info tables when the SRT field is not
1385 # needed: see comments StgFunInfoTable in InfoTables.h.
1387 # The .zero business is for Linux/ELF.
1388 # The .skip business is for Sparc/Solaris/ELF.
1389 # The .blockz business is for HPPA.
1391 # if ($words[0] =~ /^\t?(${T_DOT_WORD}\s+0|\.zero\s+4|\.skip\s+4|\.blockz\s+4)/) {
1396 for (; $i <= $#lines; $i++) {
1397 $after .= $lines[$i] . "\n";
1400 # Alphas: If we have anonymous text (not part of a procedure), the
1401 # linker may complain about missing exception information. Bleh.
1402 # To suppress this, we place a .ent/.end pair around the code.
1403 # At the same time, we have to be careful and not enclose any leading
1404 # .file/.loc directives.
1405 if ( $TargetPlatform =~ /^alpha-/ && $label =~ /^([A-Za-z0-9_]+):$/) {
1406 local ($ident) = $1;
1407 $before =~ s/^((\s*\.(file|loc)\s+[^\n]*\n)*)/$1\t.ent $ident\n/;
1408 $after .= "\t.end $ident\n";
1411 # Alphas: The heroic Simon Marlow found a bug in the Digital UNIX
1412 # assembler (!) wherein .quad constants inside .text sections are
1413 # first narrowed to 32 bits then sign-extended back to 64 bits.
1414 # This obviously screws up our 64-bit bitmaps, so we work around
1415 # the bug by replacing .quad with .align 3 + .long + .long [ccshan]
1416 if ( $TargetPlatform =~ /^alpha-/ ) {
1418 if (/^\s*\.quad\s+([-+0-9].*\S)\s*$/ && length $1 >= 10) {
1419 local ($number) = $1;
1420 if ($number =~ /^([-+])?(0x?)?([0-9]+)$/) {
1421 local ($sign, $base, $digits) = ($1, $2, $3);
1422 $base = (10, 8, 16)[length $base];
1423 local ($hi, $lo) = (0, 0);
1424 foreach $i (split(//, $digits)) {
1425 $j = $lo * $base + $i;
1426 $lo = $j % 4294967296;
1427 $hi = $hi * $base + ($j - $lo) / 4294967296;
1429 ($hi, $lo) = (4294967295 - $hi, 4294967296 - $lo)
1431 $_ = "\t.align 3\n\t.long $lo\n\t.long $hi\n";
1432 # printf STDERR "TURNING %s into 0x %08x %08x\n", $number, $hi, $lo;
1434 print STDERR "Cannot handle \".quad $number\" in info table\n";
1442 . (($TargetPlatform !~ /^hppa/) ? '' : join("\n", @imports) . "\n")
1443 . join("\n", @words) . "\n"
1446 # print STDERR "before=$before\n";
1447 # print STDERR "label=$label\n";
1448 # print STDERR "words=",(reverse @words),"\n";
1449 # print STDERR "after=$after\n";
1455 The HP is a major nuisance. The threaded code mangler moved info
1456 tables from data space to code space, but unthreaded code in the RTS
1457 still has references to info tables in data space. Since the HP
1458 linker is very precise about where symbols live, we need to patch the
1459 references in the unthreaded RTS as well.
1462 sub mini_mangle_asm_hppa {
1463 local($in_asmf, $out_asmf) = @_;
1465 open(INASM, "< $in_asmf")
1466 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
1467 open(OUTASM,"> $out_asmf")
1468 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
1471 s/_info,DATA/_info,CODE/; # Move _info references to code space
1477 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1478 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1484 sub tidy_up_and_die {
1485 local($return_val, $msg) = @_;
1487 exit (($return_val == 0) ? 0 : 1);