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_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
103 $T_DOT_WORD = '\.(long|quad|byte|word)';
104 $T_DOT_GLOBAL = '^\t\.globl';
105 $T_HDR_literal = "\.rdata\n\t\.align 3\n";
106 $T_HDR_misc = "\.text\n\t\.align 3\n";
107 $T_HDR_data = "\.data\n\t\.align 3\n";
108 $T_HDR_consist = "\.text\n";
109 $T_HDR_closure = "\.data\n\t\.align 3\n";
110 $T_HDR_srt = "\.text\n\t\.align 3\n";
111 $T_HDR_info = "\.text\n\t\.align 3\n";
112 $T_HDR_entry = "\.text\n\t\.align 3\n";
113 $T_HDR_vector = "\.text\n\t\.align 3\n";
114 $T_HDR_direct = "\.text\n\t\.align 3\n";
116 #--------------------------------------------------------#
117 } elsif ( $TargetPlatform =~ /^hppa/ ) {
119 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
120 $T_US = ''; # _ if symbols have an underscore on the front
121 $T_PRE_APP = 'DONT THINK THIS APPLIES'; # regexp that says what comes before APP/NO_APP
122 $T_CONST_LBL = '^L\$C(\d+)$'; # regexp for what such a lbl looks like
125 $T_MOVE_DIRVS = '^((\s+\.(IMPORT|EXPORT|PARAM).*|\s+\.align\s+\d+|\s+\.(SPACE|SUBSPA)\s+\S+|\s*)\n)';
126 $T_COPY_DIRVS = '^\s+\.(IMPORT|EXPORT)';
128 $T_hsc_cc_PAT = '\.STRING.*\)(hsc|cc) (.*)\\\\x09(.*)\\\\x00"';
129 $T_DOT_WORD = '\.(blockz|word|half|byte)';
130 $T_DOT_GLOBAL = '^\s+\.EXPORT';
131 $T_HDR_literal = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$LIT\$\n";
132 $T_HDR_misc = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
133 $T_HDR_data = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
134 $T_HDR_consist = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$LIT\$\n";
135 $T_HDR_closure = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
136 $T_HDR_srt = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
137 $T_HDR_info = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
138 $T_HDR_entry = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
139 $T_HDR_vector = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
140 $T_HDR_direct = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
142 #--------------------------------------------------------#
143 } elsif ( $TargetPlatform =~ /^i386-.*-(linuxaout|freebsd2|nextstep3|cygwin32|mingw32)$/ ) {
144 # NeXT added but not tested. CaS
146 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
147 $T_US = '_'; # _ if symbols have an underscore on the front
148 $T_PRE_APP = '^#'; # regexp that says what comes before APP/NO_APP
149 $T_CONST_LBL = '^LC(\d+):$';
151 $T_X86_PRE_LLBL_PAT = 'L';
152 $T_X86_PRE_LLBL = 'L';
153 $T_X86_BADJMP = '^\tjmp [^L\*]';
155 $T_MOVE_DIRVS = '^(\s*(\.(p2)?align\s+\d+(,0x90)?|\.globl\s+\S+|\.text|\.data|\.stab[^n].*|\.type\s+.*|\.size\s+.*)\n)';
156 $T_COPY_DIRVS = '\.(globl|stab)';
157 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
158 $T_DOT_WORD = '\.(long|word|value|byte|space)';
159 $T_DOT_GLOBAL = '\.globl';
160 $T_HDR_literal = "\.text\n\t\.align 2\n";
161 $T_HDR_misc = "\.text\n\t\.align 2,0x90\n";
162 $T_HDR_data = "\.data\n\t\.align 2\n";
163 $T_HDR_consist = "\.text\n";
164 $T_HDR_closure = "\.data\n\t\.align 2\n";
165 $T_HDR_srt = "\.text\n\t\.align 2\n";
166 $T_HDR_info = "\.text\n\t\.align 2\n"; # NB: requires padding
167 $T_HDR_entry = "\.text\n"; # no .align so we're right next to _info (arguably wrong...?)
168 $T_HDR_vector = "\.text\n\t\.align 2\n"; # NB: requires padding
169 $T_HDR_direct = "\.text\n\t\.align 2,0x90\n";
171 #--------------------------------------------------------#
172 } elsif ( $TargetPlatform =~ /^i386-.*-(solaris2|linux|freebsd|netbsd|openbsd)$/ ) {
174 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
175 $T_US = ''; # _ if symbols have an underscore on the front
176 $T_PRE_APP = # regexp that says what comes before APP/NO_APP
177 ($TargetPlatform =~ /-(linux|freebsd|netbsd)$/) ? '#' : '/' ;
178 $T_CONST_LBL = '^\.LC(\d+):$'; # regexp for what such a lbl looks like
180 $T_X86_PRE_LLBL_PAT = '\.L';
181 $T_X86_PRE_LLBL = '.L';
182 $T_X86_BADJMP = '^\tjmp\s+[^\.\*]';
184 $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)';
185 $T_COPY_DIRVS = '^\s*\.(globl|type|size|local)';
187 if ( $TargetPlatform =~ /freebsd|netbsd/ ) {
188 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
190 $T_hsc_cc_PAT = '\.string.*\)(hsc|cc) (.*)\\\\t(.*)"';
193 $T_DOT_WORD = '\.(long|value|word|byte|zero)';
194 $T_DOT_GLOBAL = '\.globl';
195 $T_HDR_literal = "\.section\t\.rodata\n"; # or just use .text??? (WDP 95/11)
196 $T_HDR_misc = "\.text\n\t\.align 4\n";
197 $T_HDR_data = "\.data\n\t\.align 4\n"; # ToDo: change align??
198 $T_HDR_consist = "\.text\n";
199 $T_HDR_closure = "\.data\n\t\.align 4\n"; # ToDo: change align?
200 $T_HDR_srt = "\.text\n\t\.align 4\n"; # ToDo: change align?
201 $T_HDR_info = "\.text\n\t\.align 4\n"; # NB: requires padding
202 $T_HDR_entry = "\.text\n"; # no .align so we're right next to _info (arguably wrong...?)
203 $T_HDR_vector = "\.text\n\t\.align 4\n"; # NB: requires padding
204 $T_HDR_direct = "\.text\n\t\.align 4\n";
206 #--------------------------------------------------------#
207 } elsif ( $TargetPlatform =~ /^ia64-.*-linux$/ ) {
209 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
210 $T_US = ''; # _ if symbols have an underscore on the front
212 $T_CONST_LBL = '^\.LC(\d+):$'; # regexp for what such a lbl looks like
215 $T_MOVE_DIRVS = '^(\s*\.(global|proc|pred\.safe_across_calls|text|data|section|subsection|align|size|type|ident)\s+.*\n)';
216 $T_COPY_DIRVS = '\.(global|proc)';
218 $T_hsc_cc_PAT = '\.string.*\)(hsc|cc) (.*)\\\\t(.*)"';
219 $T_DOT_WORD = '\.(long|value|byte|zero)';
220 $T_DOT_GLOBAL = '\.global';
221 $T_HDR_literal = "\.section\t\.rodata\n";
222 $T_HDR_misc = "\.text\n\t\.align 8\n";
223 $T_HDR_data = "\.data\n\t\.align 8\n";
224 $T_HDR_consist = "\.text\n";
225 $T_HDR_closure = "\.data\n\t\.align 8\n";
226 $T_HDR_srt = "\.text\n\t\.align 8\n";
227 $T_HDR_info = "\.text\n\t\.align 8\n";
228 $T_HDR_entry = "\.text\n\t\.align 16\n";
229 $T_HDR_vector = "\.text\n\t\.align 8\n";
230 $T_HDR_direct = "\.text\n\t\.align 8\n";
232 #--------------------------------------------------------#
233 } elsif ( $TargetPlatform =~ /^x86_64-.*-linux$/ ) {
235 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
236 $T_US = ''; # _ if symbols have an underscore on the front
238 $T_CONST_LBL = '^\.LC(\d+):$'; # regexp for what such a lbl looks like
241 $T_MOVE_DIRVS = '^(\s*\.(globl|text|data|section|align|size|type|ident|local)\s+.*\n)';
242 $T_COPY_DIRVS = '\.(globl|local)';
244 $T_hsc_cc_PAT = '\.string.*\)(hsc|cc) (.*)\\\\t(.*)"';
245 $T_DOT_WORD = '\.(quad|long|value|byte|zero)';
246 $T_DOT_GLOBAL = '\.global';
247 $T_HDR_literal = "\.section\t\.rodata\n";
248 $T_HDR_misc = "\.text\n\t\.align 8\n";
249 $T_HDR_data = "\.data\n\t\.align 8\n";
250 $T_HDR_consist = "\.text\n";
251 $T_HDR_closure = "\.data\n\t\.align 8\n";
252 $T_HDR_srt = "\.text\n\t\.align 8\n";
253 $T_HDR_info = "\.text\n\t\.align 8\n";
254 $T_HDR_entry = "\.text\n\t\.align 8\n";
255 $T_HDR_vector = "\.text\n\t\.align 8\n";
256 $T_HDR_direct = "\.text\n\t\.align 8\n";
258 #--------------------------------------------------------#
259 } elsif ( $TargetPlatform =~ /^m68k-.*-sunos4/ ) {
261 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
262 $T_US = '_'; # _ if symbols have an underscore on the front
263 $T_PRE_APP = '^# MAY NOT APPLY'; # regexp that says what comes before APP/NO_APP
264 $T_CONST_LBL = '^LC(\d+):$';
267 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.proc\s+\d+|\.const|\.cstring|\.globl\s+\S+|\.text|\.data|\.even|\.stab[^n].*)\n)';
268 $T_COPY_DIRVS = '\.(globl|proc|stab)';
269 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
271 $T_DOT_WORD = '\.long';
272 $T_DOT_GLOBAL = '\.globl';
273 $T_HDR_literal = "\.text\n\t\.even\n";
274 $T_HDR_misc = "\.text\n\t\.even\n";
275 $T_HDR_data = "\.data\n\t\.even\n";
276 $T_HDR_consist = "\.text\n";
277 $T_HDR_closure = "\.data\n\t\.even\n";
278 $T_HDR_srt = "\.text\n\t\.even\n";
279 $T_HDR_info = "\.text\n\t\.even\n";
280 $T_HDR_entry = "\.text\n\t\.even\n";
281 $T_HDR_vector = "\.text\n\t\.even\n";
282 $T_HDR_direct = "\.text\n\t\.even\n";
284 #--------------------------------------------------------#
285 } elsif ( $TargetPlatform =~ /^mips-.*/ ) {
287 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
288 $T_US = ''; # _ if symbols have an underscore on the front
289 $T_PRE_APP = '^\s*#'; # regexp that says what comes before APP/NO_APP
290 $T_CONST_LBL = '^\$LC(\d+):$'; # regexp for what such a lbl looks like
293 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.(globl|ent)\s+\S+|\.text|\.r?data)\n)';
294 $T_COPY_DIRVS = '\.(globl|ent)';
296 $T_hsc_cc_PAT = 'I WAS TOO LAZY TO DO THIS BIT (WDP 95/05)';
297 $T_DOT_WORD = '\.word';
298 $T_DOT_GLOBAL = '^\t\.globl';
299 $T_HDR_literal = "\t\.rdata\n\t\.align 2\n";
300 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
301 $T_HDR_data = "\t\.data\n\t\.align 2\n";
302 $T_HDR_consist = 'TOO LAZY TO DO THIS TOO';
303 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
304 $T_HDR_srt = "\t\.text\n\t\.align 2\n";
305 $T_HDR_info = "\t\.text\n\t\.align 2\n";
306 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
307 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
308 $T_HDR_direct = "\t\.text\n\t\.align 2\n";
310 #--------------------------------------------------------#
311 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ ) {
312 # Apple PowerPC Darwin/MacOS X.
313 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
314 $T_US = '_'; # _ if symbols have an underscore on the front
315 $T_PRE_APP = 'WHAT IS THIS'; # regexp that says what comes before APP/NO_APP
316 $T_CONST_LBL = '^\LC\d+:'; # regexp for what such a lbl looks like
319 $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)';
320 $T_COPY_DIRVS = '\.(globl|lcomm)';
322 $T_hsc_cc_PAT = '\.byte.*\)(hsc|cc) (.*)"\n\t\.byte \d+\n\t\.byte "(.*)"\n\t\.byte \d+';
323 $T_DOT_WORD = '\.(long|short|byte|fill|space)';
324 $T_DOT_GLOBAL = '\.globl';
325 $T_HDR_toc = "\.toc\n";
326 $T_HDR_literal = "\t\.const_data\n\t\.align 2\n";
327 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
328 $T_HDR_data = "\t\.data\n\t\.align 2\n";
329 $T_HDR_consist = "\t\.text\n\t\.align 2\n";
330 $T_HDR_closure = "\t\.const_data\n\t\.align 2\n";
331 $T_HDR_srt = "\t\.text\n\t\.align 2\n";
332 $T_HDR_info = "\t\.text\n\t\.align 2\n";
333 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
334 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
335 $T_HDR_direct = "\t\.text\n\t\.align 2\n";
337 #--------------------------------------------------------#
338 } elsif ( $TargetPlatform =~ /^sparc-.*-(solaris2|openbsd)/ ) {
340 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
341 $T_US = ''; # _ if symbols have an underscore on the front
342 $T_PRE_APP = 'DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
343 $T_CONST_LBL = '^\.LLC(\d+):$'; # regexp for what such a lbl looks like
346 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.stab.*|\.section.*|\s+\.type.*|\s+\.size.*)\n)';
347 $T_COPY_DIRVS = '\.(global|proc|stab)';
349 $T_hsc_cc_PAT = '\.asciz.*\)(hsc|cc) (.*)\\\\t(.*)"';
350 $T_DOT_WORD = '\.(long|word|byte|half|skip|uahalf|uaword)';
351 $T_DOT_GLOBAL = '^\t\.global';
352 $T_HDR_literal = "\.text\n\t\.align 8\n";
353 $T_HDR_misc = "\.text\n\t\.align 4\n";
354 $T_HDR_data = "\.data\n\t\.align 8\n";
355 $T_HDR_consist = "\.text\n";
356 $T_HDR_closure = "\.data\n\t\.align 4\n";
357 $T_HDR_srt = "\.data\n\t\.align 4\n";
358 $T_HDR_info = "\.text\n\t\.align 4\n";
359 $T_HDR_entry = "\.text\n\t\.align 4\n";
360 $T_HDR_vector = "\.text\n\t\.align 4\n";
361 $T_HDR_direct = "\.text\n\t\.align 4\n";
363 #--------------------------------------------------------#
364 } elsif ( $TargetPlatform =~ /^sparc-.*-sunos4/ ) {
366 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
367 $T_US = '_'; # _ if symbols have an underscore on the front
368 $T_PRE_APP = '^# DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
369 $T_CONST_LBL = '^LC(\d+):$';
372 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.stab.*)\n)';
373 $T_COPY_DIRVS = '\.(global|proc|stab)';
374 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
376 $T_DOT_WORD = '\.word';
377 $T_DOT_GLOBAL = '^\t\.global';
378 $T_HDR_literal = "\.text\n\t\.align 8\n";
379 $T_HDR_misc = "\.text\n\t\.align 4\n";
380 $T_HDR_data = "\.data\n\t\.align 8\n";
381 $T_HDR_consist = "\.text\n";
382 $T_HDR_closure = "\.data\n\t\.align 4\n";
383 $T_HDR_srt = "\.data\n\t\.align 4\n";
384 $T_HDR_info = "\.text\n\t\.align 4\n";
385 $T_HDR_entry = "\.text\n\t\.align 4\n";
386 $T_HDR_vector = "\.text\n\t\.align 4\n";
387 $T_HDR_direct = "\.text\n\t\.align 4\n";
389 #--------------------------------------------------------#
390 } elsif ( $TargetPlatform =~ /^sparc-.*-linux/ ) {
391 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
392 $T_US = ''; # _ if symbols have an underscore on the front
393 $T_PRE_APP = '#'; # regexp that says what comes before APP/NO_APP
394 # Probably doesn't apply anyway
395 $T_CONST_LBL = '^\.LLC(\d+):$'; # regexp for what such a lbl looks like
398 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.seg|\.stab.*|\.section.*|\s+\.type.*|\s+\.size.*)\n)';
399 $T_COPY_DIRVS = '\.(global|globl|proc|stab)';
401 $T_hsc_cc_PAT = '\.asciz.*\)(hsc|cc) (.*)\\\\t(.*)"';
402 $T_DOT_WORD = '\.(long|word|nword|xword|byte|half|short|skip|uahalf|uaword)';
403 $T_DOT_GLOBAL = '^\t\.global';
404 $T_HDR_literal = "\.text\n\t\.align 8\n";
405 $T_HDR_misc = "\.text\n\t\.align 4\n";
406 $T_HDR_data = "\.data\n\t\.align 8\n";
407 $T_HDR_consist = "\.text\n";
408 $T_HDR_closure = "\.data\n\t\.align 4\n";
409 $T_HDR_srt = "\.data\n\t\.align 4\n";
410 $T_HDR_info = "\.text\n\t\.align 4\n";
411 $T_HDR_entry = "\.text\n\t\.align 4\n";
412 $T_HDR_vector = "\.text\n\t\.align 4\n";
413 $T_HDR_direct = "\.text\n\t\.align 4\n";
415 #--------------------------------------------------------#
417 print STDERR "$Pgm: don't know how to mangle assembly language for: $TargetPlatform\n";
422 print STDERR "T_STABBY: $T_STABBY\n";
423 print STDERR "T_US: $T_US\n";
424 print STDERR "T_PRE_APP: $T_PRE_APP\n";
425 print STDERR "T_CONST_LBL: $T_CONST_LBL\n";
426 print STDERR "T_POST_LBL: $T_POST_LBL\n";
427 if ( $TargetPlatform =~ /^i386-/ ) {
428 print STDERR "T_X86_PRE_LLBL_PAT: $T_X86_PRE_LLBL_PAT\n";
429 print STDERR "T_X86_PRE_LLBL: $T_X86_PRE_LLBL\n";
430 print STDERR "T_X86_BADJMP: $T_X86_BADJMP\n";
432 print STDERR "T_MOVE_DIRVS: $T_MOVE_DIRVS\n";
433 print STDERR "T_COPY_DIRVS: $T_COPY_DIRVS\n";
434 print STDERR "T_hsc_cc_PAT: $T_hsc_cc_PAT\n";
435 print STDERR "T_DOT_WORD: $T_DOT_WORD\n";
436 print STDERR "T_HDR_literal: $T_HDR_literal\n";
437 print STDERR "T_HDR_misc: $T_HDR_misc\n";
438 print STDERR "T_HDR_data: $T_HDR_data\n";
439 print STDERR "T_HDR_consist: $T_HDR_consist\n";
440 print STDERR "T_HDR_closure: $T_HDR_closure\n";
441 print STDERR "T_HDR_info: $T_HDR_info\n";
442 print STDERR "T_HDR_entry: $T_HDR_entry\n";
443 print STDERR "T_HDR_vector: $T_HDR_vector\n";
444 print STDERR "T_HDR_direct: $T_HDR_direct\n";
450 %************************************************************************
452 \subsection{Mangle away}
454 %************************************************************************
458 local($in_asmf, $out_asmf) = @_;
460 # multi-line regexp matching:
465 &init_TARGET_STUFF();
466 &init_FUNNY_THINGS();
468 open(INASM, "< $in_asmf")
469 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
470 open(OUTASM,"> $out_asmf")
471 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
473 # read whole file, divide into "chunks":
474 # record some info about what we've found...
476 @chk = (); # contents of the chunk
477 $numchks = 0; # number of them
478 @chkcat = (); # what category of thing in each chunk
479 @chksymb = (); # what symbol(base) is defined in this chunk
480 %entrychk = (); # ditto, its entry code
481 %closurechk = (); # ditto, the (static) closure
482 %srtchk = (); # ditto, its SRT (for top-level things)
483 %infochk = (); # given a symbol base, say what chunk its info tbl is in
484 %vectorchk = (); # ditto, return vector table
485 $EXTERN_DECLS = ''; # .globl <foo> .text (MIPS only)
487 $i = 0; $chkcat[0] = 'misc'; $chk[0] = '';
490 tr/\r//d if $TargetPlatform =~ /-mingw32$/; # In case Perl doesn't convert line endings
491 next if $T_STABBY && /^\.stab.*${T_US}__stg_split_marker/o;
492 next if $T_STABBY && /^\.stab.*ghc.*c_ID/;
493 next if /^\t\.def.*endef$/;
494 next if /${T_PRE_APP}(NO_)?APP/o;
495 next if /^;/ && $TargetPlatform =~ /^hppa/;
497 next if /(^$|^\t\.file\t|^ # )/ && $TargetPlatform =~ /^(mips|ia64)-/;
499 if ( $TargetPlatform =~ /^mips-/
500 && /^\t\.(globl\S+\.text|comm\t)/ ) {
501 $EXTERN_DECLS .= $_ unless /(__DISCARD__|\b(PK_|ASSIGN_)(FLT|DBL)\b)/;
502 # Treat .comm variables as data. These show up in two (known) places:
504 # - the module_registered variable used in the __stginit fragment.
505 # even though these are declared static and initialised, gcc 3.3
506 # likes to make them .comm, presumably to save space in the
509 # - global variables used to pass arguments from C to STG in
510 # a foreign export. (is this still true? --SDM)
512 } elsif ( /^\t\.comm.*$/ ) {
514 $chkcat[$i] = 'data';
517 } elsif ( /^\s+/ ) { # most common case first -- a simple line!
518 # duplicated from the bottom
522 } elsif ( /\.\.ng:$/ && $TargetPlatform =~ /^alpha-/ ) {
523 # Alphas: Local labels not to be confused with new chunks
526 # NB: all the rest start with a non-space
528 } elsif ( $TargetPlatform =~ /^mips-/
529 && /^\d+:/ ) { # a funny-looking very-local label
532 } elsif ( /$T_CONST_LBL/o ) {
534 $chkcat[$i] = 'literal';
537 } elsif ( /^${T_US}__stg_split_marker(\d*)${T_POST_LBL}$/o ) {
539 $chkcat[$i] = 'splitmarker';
542 } elsif ( /^${T_US}([A-Za-z0-9_]+)_info${T_POST_LBL}$/o ) {
545 $chkcat[$i] = 'infotbl';
546 $chksymb[$i] = $symb;
548 die "Info table already? $symb; $i\n" if defined($infochk{$symb});
550 $infochk{$symb} = $i;
552 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(entry|ret)${T_POST_LBL}$/o ) {
554 $chkcat[$i] = 'entry';
559 } elsif ( /^${T_US}([A-Za-z0-9_]+)_closure${T_POST_LBL}$/o ) {
561 $chkcat[$i] = 'closure';
564 $closurechk{$1} = $i;
566 } elsif ( /^${T_US}([A-Za-z0-9_]+)_srt${T_POST_LBL}$/o ) {
573 } elsif ( /^${T_US}([A-Za-z0-9_]+)_ct${T_POST_LBL}$/o ) {
575 $chkcat[$i] = 'data';
578 } elsif ( /^(${T_US}__gnu_compiled_c|gcc2_compiled\.)${T_POST_LBL}/o ) {
581 } elsif ( /^${T_US}[A-Za-z0-9_]+\.\d+${T_POST_LBL}$/o
582 || /^${T_US}.*_CAT${T_POST_LBL}$/o # PROF: _entryname_CAT
583 || /^${T_US}.*_done${T_POST_LBL}$/o # PROF: _module_done
584 || /^${T_US}_module_registered${T_POST_LBL}$/o # PROF: _module_registered
587 $chkcat[$i] = 'data';
590 } elsif ( /^([A-Za-z0-9_]+)\s+\.comm/ && $TargetPlatform =~ /^hppa/ ) {
595 } elsif ( /^${T_US}([A-Za-z0-9_]+)_cc(s)?${T_POST_LBL}$/o ) {
596 # all CC_ symbols go in the data section...
598 $chkcat[$i] = 'data';
601 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(alt|dflt)${T_POST_LBL}$/o ) {
603 $chkcat[$i] = 'misc';
605 } elsif ( /^${T_US}([A-Za-z0-9_]+)_vtbl${T_POST_LBL}$/o ) {
607 $chkcat[$i] = 'vector';
612 } elsif ( $TargetPlatform =~ /^i386-.*-solaris2/
613 && /^[A-Za-z0-9][A-Za-z0-9_]*:/ ) {
614 # Some Solaris system headers contain function definitions (as
615 # opposed to mere prototypes), which end up in the .hc file when
616 # a Haskell module foreign imports the corresponding system
617 # functions (most notably stat()). We put them into the text
618 # segment. Note that this currently does not extend to function
619 # names starting with an underscore.
622 $chkcat[$i] = 'misc';
625 } elsif ( /^${T_US}[A-Za-z0-9_]/o
626 && ( $TargetPlatform !~ /^hppa/ # need to avoid local labels in this case
627 || ! /^L\$\d+$/ ) ) {
631 print STDERR "Warning: retaining unknown function \`$thing' in output from C compiler\n"
632 unless # $KNOWN_FUNNY_THING{$thing}
633 /^${T_US}stg_.*${T_POST_LBL}$/o # RTS internals
634 || /^${T_US}__stg_.*${T_POST_LBL}$/o # more RTS internals
635 || /^${T_US}__fexp_.*${T_POST_LBL}$/o # foreign export
636 || /^${T_US}.*_slow${T_POST_LBL}$/o # slow entry
637 || /^${T_US}__stginit.*${T_POST_LBL}$/o # __stginit<module>
638 || /^${T_US}.*_btm${T_POST_LBL}$/o # large bitmaps
639 || /^${T_US}.*_srtd${T_POST_LBL}$/o # large bitmaps
640 || /^${T_US}.*_fast${T_POST_LBL}$/o # primops
641 || /^${T_US}.*_closure_tbl${T_POST_LBL}$/o # closure tables
642 || /^_uname:/o; # x86/Solaris2
644 $chkcat[$i] = 'misc';
647 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && (
649 || /^\.section __TEXT,__picsymbol_stub1,.*/
651 || /^\.section __TEXT,__symbol_stub1,.*/
652 || /^\.lazy_symbol_pointer/
653 || /^\.non_lazy_symbol_pointer/ ))
656 $chkcat[$i] = 'dyld';
658 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && /^\.data/ && $chkcat[$i] eq 'dyld')
659 { # non_lazy_symbol_ptrs that point to local symbols
661 $chkcat[$i] = 'dyld';
663 } else { # simple line (duplicated at the top)
668 $numchks = $#chk + 1;
670 # open CHUNKS, ">/tmp/chunks1" or die "Cannot open /tmp/chunks1: $!\n";
671 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
674 # the division into chunks is imperfect;
675 # we throw some things over the fence into the next
678 # also, there are things we would like to know
679 # about the whole module before we start spitting
682 local($FIRST_MANGLABLE) = ($TargetPlatform =~ /^(alpha-|hppa|mips-)/) ? 1 : 0;
683 local($FIRST_TOSSABLE ) = ($TargetPlatform =~ /^(hppa|mips-)/) ? 1 : 0;
685 # print STDERR "first chunk to mangle: $FIRST_MANGLABLE\n";
687 # Alphas: NB: we start meddling at chunk 1, not chunk 0
688 # The first ".rdata" is quite magical; as of GCC 2.7.x, it
689 # spits a ".quad 0" in after the very first ".rdata"; we
690 # detect this special case (tossing the ".quad 0")!
691 local($magic_rdata_seen) = 0;
693 # HPPAs, MIPSen: also start medding at chunk 1
695 for ($i = $FIRST_TOSSABLE; $i < $numchks; $i++) {
696 $c = $chk[$i]; # convenience copy
698 # print STDERR "\nCHK $i (BEFORE) (",$chkcat[$i],"):\n", $c;
700 # toss all prologue stuff; HPPA is pretty weird
702 $c = &hppa_mash_prologue($c) if $TargetPlatform =~ /^hppa-/;
704 # be slightly paranoid to make sure there's
705 # nothing surprising in there
706 if ( $c =~ /--- BEGIN ---/ ) {
707 if (($p, $r) = split(/--- BEGIN ---/, $c)) {
709 # remove junk whitespace around the split point
713 if ($TargetPlatform =~ /^i386-/) {
714 $p =~ s/^\tpushl\s+\%edi\n//;
715 $p =~ s/^\tpushl\s+\%esi\n//;
716 $p =~ s/^\tpushl\s+\%ebx\n//;
717 $p =~ s/^\tmovl\s+\%esi,\s*\d*\(\%esp\)\n//;
718 $p =~ s/^\tmovl\s+\%edi,\s*\d*\(\%esp\)\n//;
719 $p =~ s/^\tsubl\s+\$\d+,\s*\%esp\n//;
720 $p =~ s/^\tmovl\s+\$\d+,\s*\%eax\n\tcall\s+__alloca\n// if ($TargetPlatform =~ /^.*-cygwin32/);
722 # GCC 3.1 is in the habit of adding spurious writes to the
723 # stack in the prologue. Just to be on the safe side,
724 # chuck these over the fence into the main code.
725 while ($p =~ /^\tmovl\s+\$\d+,\s*\d*\(\%esp\)\n/) {
726 # print "Spurious instruction: $&";
731 } elsif ($TargetPlatform =~ /^x86_64-/) {
732 $p =~ s/^\tpushq\s+\%r(bx|bp|12|13|14)\n//g;
733 $p =~ s/^\tmovq\s+\%r(bx|bp|12|13|14),\s*\d*\(\%rsp\)\n//g;
734 $p =~ s/^\tsubq\s+\$\d+,\s*\%rsp\n//;
736 } elsif ($TargetPlatform =~ /^ia64-/) {
737 $p =~ s/^\t\.prologue .*\n//;
738 $p =~ s/^\t\.save ar\.pfs, r\d+\n\talloc r\d+ = ar\.pfs, 0, 3[12], \d+, 0\n//;
739 $p =~ s/^\t\.fframe \d+\n\tadds r12 = -\d+, r12\n//;
740 $p =~ s/^\t\.save rp, r\d+\n\tmov r\d+ = b0\n//;
741 $p =~ s/^\t\.(mii|mmi)\n//g; # bundling is no longer sensible
742 $p =~ s/^\t;;\n//g; # discard stops
743 $p =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
745 # GCC 3.3 saves r1 in the prologue, move this to the body
746 if ($p =~ /^\tmov r\d+ = r1\n/) {
750 } elsif ($TargetPlatform =~ /^m68k-/) {
751 $p =~ s/^\tlink a6,#-?\d.*\n//;
752 $p =~ s/^\tpea a6@\n\tmovel sp,a6\n//;
753 # The above showed up in the asm code,
754 # so I added it here.
755 # I hope it's correct.
757 $p =~ s/^\tmovel d2,sp\@-\n//;
758 $p =~ s/^\tmovel d5,sp\@-\n//; # SMmark.* only?
759 $p =~ s/^\tmoveml \#0x[0-9a-f]+,sp\@-\n//; # SMmark.* only?
760 } elsif ($TargetPlatform =~ /^mips-/) {
761 # the .frame/.mask/.fmask that we use is the same
762 # as that produced by GCC for miniInterpret; this
763 # gives GDB some chance of figuring out what happened
764 $FRAME = "\t.frame\t\$sp,2168,\$31\n\t.mask\t0x90000000,-4\n\t.fmask\t0x00000000,0\n";
765 $p =~ s/^\t\.(frame).*\n/__FRAME__/g;
766 $p =~ s/^\t\.(mask|fmask).*\n//g;
767 $p =~ s/^\t\.cprestore.*\n/\t\.cprestore 416\n/; # 16 + 100 4-byte args
768 $p =~ s/^\tsubu\t\$sp,\$sp,\d+\n//;
769 $p =~ s/^\tsw\t\$31,\d+\(\$sp\)\n//;
770 $p =~ s/^\tsw\t\$fp,\d+\(\$sp\)\n//;
771 $p =~ s/^\tsw\t\$28,\d+\(\$sp\)\n//;
772 $p =~ s/__FRAME__/$FRAME/;
773 } elsif ($TargetPlatform =~ /^powerpc-apple-.*/) {
775 $pcrel_label =~ s/(.|\n)*^(L\d+\$pb):\n(.|\n)*/$2/ or $pcrel_label = "";
777 $p =~ s/^\tmflr r0\n//;
778 $p =~ s/^\tbl saveFP # f\d+\n//;
779 $p =~ s/^\tbl saveFP ; save f\d+-f\d+\n//;
780 $p =~ s/^L\d+\$pb:\n//;
781 $p =~ s/^\tstmw r\d+,-\d+\(r1\)\n//;
782 $p =~ s/^\tstfd f\d+,-\d+\(r1\)\n//g;
783 $p =~ s/^\tstw r0,\d+\(r1\)\n//g;
784 $p =~ s/^\tstwu r1,-\d+\(r1\)\n//;
785 $p =~ s/^\tstw r\d+,-\d+\(r1\)\n//g;
786 $p =~ s/^\tbcl 20,31,L\d+\$pb\n//;
787 $p =~ s/^L\d+\$pb:\n//;
788 $p =~ s/^\tmflr r31\n//;
790 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
791 # under some circumstances, only when generating position dependent code.
792 # I have no idea why, and I don't think it is necessary, so let's toss it.
793 $p =~ s/^\tli r\d+,0\n//g;
794 $p =~ s/^\tstw r\d+,\d+\(r1\)\n//g;
796 print STDERR "$Pgm: unknown prologue mangling? $TargetPlatform\n";
799 # HWL HACK: dont die, just print a warning
800 #print stderr "HWL: this should die! Prologue junk?: $p\n" if $p =~ /^\t[^\.]/;
801 die "Prologue junk?: $p\n" if $p =~ /^\s+[^\s\.]/;
803 if ($TargetPlatform =~ /^powerpc-apple-.*/ && $pcrel_label ne "") {
804 # on PowerPC, we have to keep a part of the prologue
805 # (which loads the current instruction pointer into register r31)
806 $p .= "bcl 20,31,$pcrel_label\n";
807 $p .= "$pcrel_label:\n";
808 $p .= "\tmflr r31\n";
811 # glue together what's left
816 if ( $TargetPlatform =~ /^mips-/ ) {
817 # MIPS: first, this basic sequence may occur "--- END ---" or not
818 $c =~ s/^\tlw\t\$31,\d+\(\$sp\)\n\taddu\t\$sp,\$sp,\d+\n\tj\t\$31\n\t\.end/\t\.end/;
821 # toss all epilogue stuff; again, paranoidly
822 if ( $c =~ /--- END ---/ ) {
823 if (($r, $e) = split(/--- END ---/, $c)) {
824 if ($TargetPlatform =~ /^i386-/) {
826 $e =~ s/^\tpopl\s+\%edi\n//;
827 $e =~ s/^\tpopl\s+\%esi\n//;
828 $e =~ s/^\tpopl\s+\%edx\n//;
829 $e =~ s/^\tpopl\s+\%ecx\n//;
830 $e =~ s/^\taddl\s+\$\d+,\s*\%esp\n//;
831 $e =~ s/^\tsubl\s+\$-\d+,\s*\%esp\n//;
832 } elsif ($TargetPlatform =~ /^ia64-/) {
833 $e =~ s/^\tmov ar\.pfs = r\d+\n//;
834 $e =~ s/^\tmov b0 = r\d+\n//;
835 $e =~ s/^\t\.restore sp\n\tadds r12 = \d+, r12\n//;
836 $e =~ s/^\tbr\.ret\.sptk\.many b0\n//;
837 $e =~ s/^\t\.(mii|mmi|mib)\n//g; # bundling is no longer sensible
838 $e =~ s/^\t;;\n//g; # discard stops - stop at end of body is sufficient
839 $e =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
840 } elsif ($TargetPlatform =~ /^m68k-/) {
841 $e =~ s/^\tunlk a6\n//;
843 } elsif ($TargetPlatform =~ /^mips-/) {
844 $e =~ s/^\tlw\t\$31,\d+\(\$sp\)\n//;
845 $e =~ s/^\tlw\t\$fp,\d+\(\$sp\)\n//;
846 $e =~ s/^\taddu\t\$sp,\$sp,\d+\n//;
847 $e =~ s/^\tj\t\$31\n//;
848 } elsif ($TargetPlatform =~ /^powerpc-apple-.*/) {
849 $e =~ s/^\taddi r1,r1,\d+\n//;
850 $e =~ s/^\tcal r1,\d+\(r1\)\n//;
851 $e =~ s/^\tlw?z? r\d+,\d+\(r1\)\n//;
852 $e =~ s/^\tmtlr r0\n//;
855 print STDERR "$Pgm: unknown epilogue mangling? $TargetPlatform\n";
858 print STDERR "WARNING: Epilogue junk?: $e\n" if $e =~ /^\t\s*[^\.\s\n]/;
860 # glue together what's left
862 $c =~ s/\n\t\n/\n/; # junk blank line
866 # On SPARCs, we don't do --- BEGIN/END ---, we just
867 # toss the register-windowing save/restore/ret* instructions
869 if ( $TargetPlatform =~ /^sparc-/ ) {
870 $c =~ s/^\t(save.*|restore.*|ret|retl)\n//g;
871 # throw away PROLOGUE comments
872 $c =~ s/^\t!#PROLOGUE# 0\n\t!#PROLOGUE# 1\n//;
875 # On Alphas, the prologue mangling is done a little later (below)
877 # toss all calls to __DISCARD__
878 $c =~ s/^\t(call|jbsr|jal)\s+${T_US}__DISCARD__\n//go;
879 $c =~ s/^\tjsr\s+\$26\s*,\s*${T_US}__DISCARD__\n//go if $TargetPlatform =~ /^alpha-/;
880 $c =~ s/^\tbl\s+L___DISCARD__\$stub\n//go if $TargetPlatform =~ /^powerpc-apple-.*/;
882 # IA64: mangle tailcalls into jumps here
883 if ($TargetPlatform =~ /^ia64-/) {
884 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/) {
885 # Eek, the gcc optimiser is getting smarter... if we see a jump to the --- TAILCALL ---
886 # marker then we reapply the substitution at the source sites
887 $c =~ s/^\tbr \.L$2\n/\t--- TAILCALL ---\n/g if ($2);
891 # MIPS: that may leave some gratuitous asm macros around
892 # (no harm done; but we get rid of them to be tidier)
893 $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/
894 if $TargetPlatform =~ /^mips-/;
896 # toss stack adjustment after DoSparks
897 $c =~ s/^(\tjbsr _DoSparks\n)\taddqw #8,sp/$1/g
898 if $TargetPlatform =~ /^m68k-/; # this looks old...
900 if ( $TargetPlatform =~ /^alpha-/ &&
901 ! $magic_rdata_seen &&
902 $c =~ /^\s*\.rdata\n\t\.quad 0\n\t\.align \d\n/ ) {
903 $c =~ s/^\s*\.rdata\n\t\.quad 0\n\t\.align (\d)\n/\.rdata\n\t\.align $1\n/;
904 $magic_rdata_seen = 1;
907 # pick some end-things and move them to the next chunk
909 # pin a funny end-thing on (for easier matching):
910 $c .= 'FUNNY#END#THING';
912 while ( $c =~ /${T_MOVE_DIRVS}FUNNY#END#THING/o ) {
916 # on x86 we try not to copy any directives into a literal
917 # chunk, rather we keep looking for the next real chunk. This
918 # is because we get things like
920 # .globl blah_closure
926 if ( $TargetPlatform =~ /^(i386|sparc|powerpc)/ && $to_move =~ /${T_COPY_DIRVS}/ ) {
928 while ( $j < $numchks && $chk[$j] =~ /$T_CONST_LBL/) {
931 if ( $j < $numchks ) {
932 $chk[$j] = $to_move . $chk[$j];
936 elsif ( $i < ($numchks - 1)
937 && ( $to_move =~ /${T_COPY_DIRVS}/
938 || ($TargetPlatform =~ /^hppa/ && $to_move =~ /align/ && $chkcat[$i+1] eq 'literal') )) {
939 $chk[$i + 1] = $to_move . $chk[$i + 1];
940 # otherwise they're tossed
943 $c =~ s/${T_MOVE_DIRVS}FUNNY#END#THING/FUNNY#END#THING/o;
946 if ( $TargetPlatform =~ /^alpha-/ && $c =~ /^\t\.ent\s+(\S+)/ ) {
948 # toss all prologue stuff, except for loading gp, and the ..ng address
949 unless ($c =~ /\.ent.*\n\$.*\.\.ng:/) {
950 if (($p, $r) = split(/^\t\.prologue/, $c)) {
951 if (($keep, $junk) = split(/\.\.ng:/, $p)) {
952 $keep =~ s/^\t\.frame.*\n/\t.frame \$30,0,\$26,0\n/;
953 $keep =~ s/^\t\.(mask|fmask).*\n//g;
954 $c = $keep . "..ng:\n";
956 print STDERR "malformed code block ($ent)?\n"
959 $c .= "\t.prologue" . $r;
963 $c =~ s/FUNNY#END#THING//;
965 # print STDERR "\nCHK $i (AFTER) (",$chkcat[$i],"):\n", $c;
967 $chk[$i] = $c; # update w/ convenience copy
970 # open CHUNKS, ">/tmp/chunks2" or die "Cannot open /tmp/chunks2: $!\n";
971 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
974 if ( $TargetPlatform =~ /^alpha-/ ) {
975 # print out the header stuff first
976 $chk[0] =~ s/^(\t\.file.*)"(ghc\d+\.c)"/$1"$ifile_root.hc"/;
977 print OUTASM $chk[0];
979 } elsif ( $TargetPlatform =~ /^hppa/ ) {
980 print OUTASM $chk[0];
982 } elsif ( $TargetPlatform =~ /^mips-/ ) {
983 $chk[0] = "\t\.file\t1 \"$ifile_root.hc\"\n" . $chk[0];
985 # get rid of horrible "<dollar>Revision: .*$" strings
986 local(@lines0) = split(/\n/, $chk[0]);
988 while ( $z <= $#lines0 ) {
989 if ( $lines0[$z] =~ /^\t\.byte\t0x24,0x52,0x65,0x76,0x69,0x73,0x69,0x6f$/ ) {
992 while ( $z <= $#lines0 ) {
994 last if $lines0[$z] =~ /[,\t]0x0$/;
1000 $chk[0] = join("\n", @lines0);
1001 $chk[0] =~ s/\n\n+/\n/;
1002 print OUTASM $chk[0];
1005 # print out all the literal strings next
1006 for ($i = 0; $i < $numchks; $i++) {
1007 if ( $chkcat[$i] eq 'literal' ) {
1008 print OUTASM $T_HDR_literal, $chk[$i];
1009 print OUTASM "; end literal\n" if $TargetPlatform =~ /^hppa/; # for the splitter
1011 $chkcat[$i] = 'DONE ALREADY';
1015 # on the HPPA, print out all the bss next
1016 if ( $TargetPlatform =~ /^hppa/ ) {
1017 for ($i = 1; $i < $numchks; $i++) {
1018 if ( $chkcat[$i] eq 'bss' ) {
1019 print OUTASM "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$BSS\$\n\t.align 4\n";
1020 print OUTASM $chk[$i];
1022 $chkcat[$i] = 'DONE ALREADY';
1027 for ($i = $FIRST_MANGLABLE; $i < $numchks; $i++) {
1028 # print STDERR "$i: cat $chkcat[$i], symb $chksymb[$i]\n";
1030 next if $chkcat[$i] eq 'DONE ALREADY';
1032 if ( $chkcat[$i] eq 'misc' ) {
1033 if ($chk[$i] ne '') {
1034 print OUTASM $T_HDR_misc;
1035 &print_doctored($chk[$i], 0);
1038 } elsif ( $chkcat[$i] eq 'toss' ) {
1039 print STDERR "*** NB: TOSSING code for $chksymb[$i] !!! ***\n";
1041 } elsif ( $chkcat[$i] eq 'data' ) {
1042 if ($chk[$i] ne '') {
1043 print OUTASM $T_HDR_data;
1044 print OUTASM $chk[$i];
1047 } elsif ( $chkcat[$i] eq 'consist' ) {
1048 if ( $chk[$i] =~ /$T_hsc_cc_PAT/o ) {
1049 local($consist) = "$1.$2.$3";
1050 $consist =~ s/,/./g;
1051 $consist =~ s/\//./g;
1052 $consist =~ s/-/_/g;
1053 $consist =~ s/[^A-Za-z0-9_.]/ZZ/g; # ToDo: properly?
1055 # Using a cygnus-2.7-96q4 gcc build on hppas, the
1056 # consistency chunk for ghc_cc_ID often (but not always!)
1057 # gets lumped with a bunch of .IMPORT directives containing info on
1058 # the code or data space nature of external symbols. We can't
1059 # toss these, so once the consistency ID has been turned into
1060 # a representable symbol, we substitute it for the symbol
1061 # that the string was attached to in the first place (ghc_cc_ID.)
1062 # (The original string is also substituted away.)
1064 # This change may affect the code output on other platforms in
1065 # adverse ways, hence we restrict this hack hppa targets only.
1068 if ( $TargetPlatform =~ /^hppa/ ) {
1069 $chk[$i] =~ s/^${T_US}ghc.*c_ID$TPOSTLBL/$consist/o;
1070 $chk[$i] =~ s/\t$T_hsc_cc_PAT/$T_HDR_misc/o;
1071 $consist = $chk[$i]; #clumsily
1073 print OUTASM $T_HDR_consist, "${consist}${T_POST_LBL}\n";
1075 } elsif ( $TargetPlatform !~ /^(mips)-/ ) { # we just don't try in those case (ToDo)
1076 # on mips: consistency string is just a v
1077 # horrible bunch of .bytes,
1078 # which I am too lazy to sort out (WDP 95/05)
1080 print STDERR "Couldn't grok consistency: ", $chk[$i];
1083 } elsif ( $chkcat[$i] eq 'splitmarker' ) {
1084 # we can just re-constitute this one...
1085 # NB: we emit _three_ underscores no matter what,
1086 # so ghc-split doesn't have to care.
1087 print OUTASM "___stg_split_marker",$chksymb[$i],"${T_POST_LBL}\n";
1089 } elsif ( $chkcat[$i] eq 'closure'
1090 || $chkcat[$i] eq 'srt'
1091 || $chkcat[$i] eq 'infotbl'
1092 || $chkcat[$i] eq 'entry') { # do them in that order
1093 $symb = $chksymb[$i];
1096 if ( defined($closurechk{$symb}) ) {
1097 print OUTASM $T_HDR_closure;
1098 print OUTASM $chk[$closurechk{$symb}];
1099 $chkcat[$closurechk{$symb}] = 'DONE ALREADY';
1103 if ( defined($srtchk{$symb}) ) {
1104 print OUTASM $T_HDR_srt;
1105 print OUTASM $chk[$srtchk{$symb}];
1106 $chkcat[$srtchk{$symb}] = 'DONE ALREADY';
1110 if ( defined($infochk{$symb}) ) {
1112 print OUTASM $T_HDR_info;
1113 print OUTASM &rev_tbl($symb, $chk[$infochk{$symb}], 1);
1115 # entry code will be put here!
1117 $chkcat[$infochk{$symb}] = 'DONE ALREADY';
1121 if ( defined($entrychk{$symb}) ) {
1123 $c = $chk[$entrychk{$symb}];
1125 print OUTASM $T_HDR_entry;
1127 &print_doctored($c, 1); # NB: the 1!!!
1129 $chkcat[$entrychk{$symb}] = 'DONE ALREADY';
1132 } elsif ( $chkcat[$i] eq 'vector'
1133 || $chkcat[$i] eq 'direct' ) { # do them in that order
1134 $symb = $chksymb[$i];
1137 if ( defined($vectorchk{$symb}) ) {
1138 print OUTASM $T_HDR_vector;
1139 print OUTASM &rev_tbl($symb, $chk[$vectorchk{$symb}], 0);
1141 # direct return code will be put here!
1142 $chkcat[$vectorchk{$symb}] = 'DONE ALREADY';
1144 } elsif ( $TargetPlatform =~ /^alpha-/ ) {
1145 # Alphas: the commented nop is for the splitter, to ensure
1146 # that no module ends with a label as the very last
1147 # thing. (The linker will adjust the label to point
1148 # to the first code word of the next module linked in,
1149 # even if alignment constraints cause the label to move!)
1151 print OUTASM "\t# nop\n";
1154 } elsif ( $chkcat[$i] eq 'toc' ) {
1155 # silly optimisation to print tocs, since they come in groups...
1156 print OUTASM $T_HDR_toc;
1158 while ($chkcat[$j] eq 'toc')
1159 { if ( $chk[$j] !~ /\.tc UpdatePAP\[TC\]/ # not needed: always turned into a jump.
1162 print OUTASM $chk[$j];
1164 $chkcat[$j] = 'DONE ALREADY';
1168 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && $chkcat[$i] eq 'dyld' ) {
1169 # powerpc-apple: dynamic linker stubs
1170 if($chk[$i] !~ /\.indirect_symbol ___DISCARD__/)
1171 { # print them out unchanged, but remove the stubs for __DISCARD__
1172 print OUTASM $chk[$i];
1175 &tidy_up_and_die(1,"$Pgm: unknown chkcat (ghc-asm: $TargetPlatform)\n$chkcat[$i]\n$chk[$i]\n");
1179 print OUTASM $EXTERN_DECLS if $TargetPlatform =~ /^mips-/;
1182 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1183 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1188 sub hppa_mash_prologue { # OK, epilogue, too
1191 # toss all prologue stuff
1192 s/^\s+\.ENTRY[^\0]*--- BEGIN ---/\t.ENTRY/;
1194 # Lie about our .CALLINFO
1195 s/^\s+\.CALLINFO.*$/\t.CALLINFO NO_CALLS,NO_UNWIND/;
1202 # toss all epilogue stuff
1203 s/^\s+--- END ---[^\0]*\.EXIT/\t.EXIT/;
1205 # Sorry; we moved the _info stuff to the code segment.
1206 s/_info,DATA/_info,CODE/g;
1213 sub print_doctored {
1214 local($_, $need_fallthru_patch) = @_;
1216 if ( $TargetPlatform !~ /^i386-/
1217 || ! /^\t[a-z]/ # no instructions in here, apparently
1218 || /^${T_US}__stginit_[A-Za-z0-9_]+${T_POST_LBL}/) {
1222 # OK, must do some x86 **HACKING**
1224 local($entry_patch) = '';
1225 local($exit_patch) = '';
1227 # gotta watch out for weird instructions that
1228 # invisibly smash various regs:
1229 # rep* %ecx used for counting
1230 # scas* %edi used for destination index
1231 # cmps* %e[sd]i used for indices
1232 # loop* %ecx used for counting
1237 # * use of STG reg [ nn(%ebx) ] where no machine reg avail
1239 # * GCC used an "STG reg" for its own purposes
1241 # * some secret uses of machine reg, requiring STG reg
1242 # to be saved/restored
1244 # The most dangerous "GCC uses" of an "STG reg" are when
1245 # the reg holds the target of a jmp -- it's tricky to
1246 # insert the patch-up code before we get to the target!
1247 # So here we change the jmps:
1249 # --------------------------------------------------------
1250 # it can happen that we have jumps of the form...
1251 # jmp *<something involving %esp>
1253 # jmp <something involving another naughty register...>
1255 # a reasonably-common case is:
1257 # movl $_blah,<bad-reg>
1261 s/^\tmovl\s+\$${T_US}(.*),\s*(\%e[abcd]x)\n\tjmp\s+\*\2/\tjmp $T_US$1/g;
1263 if ($StolenX86Regs <= 2 ) { # YURGH! spurious uses of esi?
1264 s/^\tmovl\s+(.*),\s*\%esi\n\tjmp\s+\*%esi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1265 s/^\tjmp\s+\*(.*\(.*\%esi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1266 s/^\tjmp\s+\*\%esi\n/\tmovl \%esi,\%eax\n\tjmp \*\%eax\n/g;
1267 die "$Pgm: (mangler) still have jump involving \%esi!\n$_"
1268 if /(jmp|call)\s+.*\%esi/;
1270 if ($StolenX86Regs <= 3 ) { # spurious uses of edi?
1271 s/^\tmovl\s+(.*),\s*\%edi\n\tjmp\s+\*%edi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1272 s/^\tjmp\s+\*(.*\(.*\%edi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1273 s/^\tjmp\s+\*\%edi\n/\tmovl \%edi,\%eax\n\tjmp \*\%eax\n/g;
1274 die "$Pgm: (mangler) still have jump involving \%edi!\n$_"
1275 if /(jmp|call)\s+.*\%edi/;
1278 # OK, now we can decide what our patch-up code is going to
1281 # Offsets into register table - you'd better update these magic
1282 # numbers should you change its contents!
1283 # local($OFFSET_R1)=0; No offset for R1 in new RTS.
1284 local($OFFSET_Hp)=88;
1286 # Note funky ".=" stuff; we're *adding* to these _patch guys
1287 if ( $StolenX86Regs <= 2
1288 && ( /[^0-9]\(\%ebx\)/ || /\%esi/ || /^\tcmps/ ) ) { # R1 (esi)
1289 $entry_patch .= "\tmovl \%esi,(\%ebx)\n";
1290 $exit_patch .= "\tmovl (\%ebx),\%esi\n";
1292 # nothing for call_{entry,exit} because %esi is callee-save
1294 if ( $StolenX86Regs <= 3
1295 && ( /${OFFSET_Hp}\(\%ebx\)/ || /\%edi/ || /^\t(scas|cmps)/ ) ) { # Hp (edi)
1296 $entry_patch .= "\tmovl \%edi,${OFFSET_Hp}(\%ebx)\n";
1297 $exit_patch .= "\tmovl ${OFFSET_Hp}(\%ebx),\%edi\n";
1299 # nothing for call_{entry,exit} because %edi is callee-save
1302 # --------------------------------------------------------
1303 # next, here we go with non-%esp patching!
1305 s/^(\t[a-z])/$entry_patch$1/; # before first instruction
1307 # Before calling GC we must set up the exit condition before the call
1308 # and entry condition when we come back
1310 # fix _all_ non-local jumps:
1312 s/^\tjmp\s+\*${T_X86_PRE_LLBL_PAT}/\tJMP___SL/go;
1313 s/^\tjmp\s+${T_X86_PRE_LLBL_PAT}/\tJMP___L/go;
1315 s/^(\tjmp\s+.*\n)/$exit_patch$1/g; # here's the fix...
1317 s/^\tJMP___SL/\tjmp \*${T_X86_PRE_LLBL}/go;
1318 s/^\tJMP___L/\tjmp ${T_X86_PRE_LLBL}/go;
1320 if ($StolenX86Regs == 2 ) {
1321 die "ARGH! Jump uses \%esi or \%edi with -monly-2-regs:\n$_"
1322 if /^\t(jmp|call)\s+.*\%e(si|di)/;
1323 } elsif ($StolenX86Regs == 3 ) {
1324 die "ARGH! Jump uses \%edi with -monly-3-regs:\n$_"
1325 if /^\t(jmp|call)\s+.*\%edi/;
1328 # --------------------------------------------------------
1329 # that's it -- print it
1331 #die "Funny jumps?\n$_" if /${T_X86_BADJMP}/o; # paranoia
1335 if ( $need_fallthru_patch ) { # exit patch for end of slow entry code
1336 print OUTASM $exit_patch;
1337 # ToDo: make it not print if there is a "jmp" at the end
1343 sub init_FUNNY_THINGS {
1344 %KNOWN_FUNNY_THING = (
1346 # "${T_US}stg_.*{T_POST_LBL}", 1,
1351 The following table reversal is used for both info tables and return
1352 vectors. In both cases, we remove the first entry from the table,
1353 reverse the table, put the label at the end, and paste some code
1354 (that which is normally referred to by the first entry in the table)
1355 right after the table itself. (The code pasting is done elsewhere.)
1359 local($symb, $tbl, $discard1) = @_;
1361 return ($tbl) if ($TargetPlatform =~ /^ia64-/);
1363 local($before) = '';
1365 local(@imports) = (); # hppa only
1368 local(@lines) = split(/\n/, $tbl);
1371 # Deal with the header...
1372 for ($i = 0; $i <= $#lines && $lines[$i] !~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1373 $label .= $lines[$i] . "\n",
1374 next if $lines[$i] =~ /^[A-Za-z0-9_]+_info${T_POST_LBL}$/o
1375 || $lines[$i] =~ /${T_DOT_GLOBAL}/o
1376 || $lines[$i] =~ /^${T_US}\S+_vtbl${T_POST_LBL}$/o;
1378 $before .= $lines[$i] . "\n"; # otherwise...
1381 # Grab the table data...
1382 if ( $TargetPlatform !~ /^hppa/ ) {
1383 for ( ; $i <= $#lines && $lines[$i] =~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1384 push(@words, $lines[$i]);
1386 } else { # hppa weirdness
1387 for ( ; $i <= $#lines && $lines[$i] =~ /^\s+(${T_DOT_WORD}|\.IMPORT)/; $i++) {
1388 if ($lines[$i] =~ /^\s+\.IMPORT/) {
1389 push(@imports, $lines[$i]);
1391 # We don't use HP's ``function pointers''
1392 # We just use labels in code space, like normal people
1393 $lines[$i] =~ s/P%//;
1394 push(@words, $lines[$i]);
1399 # Now throw away any initial zero word from the table. This is a hack
1400 # that lets us reduce the size of info tables when the SRT field is not
1401 # needed: see comments StgFunInfoTable in InfoTables.h.
1403 # The .zero business is for Linux/ELF.
1404 # The .skip business is for Sparc/Solaris/ELF.
1405 # The .blockz business is for HPPA.
1407 # if ($words[0] =~ /^\t?(${T_DOT_WORD}\s+0|\.zero\s+4|\.skip\s+4|\.blockz\s+4)/) {
1412 for (; $i <= $#lines; $i++) {
1413 $after .= $lines[$i] . "\n";
1416 # Alphas: If we have anonymous text (not part of a procedure), the
1417 # linker may complain about missing exception information. Bleh.
1418 # To suppress this, we place a .ent/.end pair around the code.
1419 # At the same time, we have to be careful and not enclose any leading
1420 # .file/.loc directives.
1421 if ( $TargetPlatform =~ /^alpha-/ && $label =~ /^([A-Za-z0-9_]+):$/) {
1422 local ($ident) = $1;
1423 $before =~ s/^((\s*\.(file|loc)\s+[^\n]*\n)*)/$1\t.ent $ident\n/;
1424 $after .= "\t.end $ident\n";
1427 # Alphas: The heroic Simon Marlow found a bug in the Digital UNIX
1428 # assembler (!) wherein .quad constants inside .text sections are
1429 # first narrowed to 32 bits then sign-extended back to 64 bits.
1430 # This obviously screws up our 64-bit bitmaps, so we work around
1431 # the bug by replacing .quad with .align 3 + .long + .long [ccshan]
1432 if ( $TargetPlatform =~ /^alpha-/ ) {
1434 if (/^\s*\.quad\s+([-+0-9].*\S)\s*$/ && length $1 >= 10) {
1435 local ($number) = $1;
1436 if ($number =~ /^([-+])?(0x?)?([0-9]+)$/) {
1437 local ($sign, $base, $digits) = ($1, $2, $3);
1438 $base = (10, 8, 16)[length $base];
1439 local ($hi, $lo) = (0, 0);
1440 foreach $i (split(//, $digits)) {
1441 $j = $lo * $base + $i;
1442 $lo = $j % 4294967296;
1443 $hi = $hi * $base + ($j - $lo) / 4294967296;
1445 ($hi, $lo) = (4294967295 - $hi, 4294967296 - $lo)
1447 $_ = "\t.align 3\n\t.long $lo\n\t.long $hi\n";
1448 # printf STDERR "TURNING %s into 0x %08x %08x\n", $number, $hi, $lo;
1450 print STDERR "Cannot handle \".quad $number\" in info table\n";
1458 . (($TargetPlatform !~ /^hppa/) ? '' : join("\n", @imports) . "\n")
1459 . join("\n", @words) . "\n"
1462 # print STDERR "before=$before\n";
1463 # print STDERR "label=$label\n";
1464 # print STDERR "words=",(reverse @words),"\n";
1465 # print STDERR "after=$after\n";
1471 The HP is a major nuisance. The threaded code mangler moved info
1472 tables from data space to code space, but unthreaded code in the RTS
1473 still has references to info tables in data space. Since the HP
1474 linker is very precise about where symbols live, we need to patch the
1475 references in the unthreaded RTS as well.
1478 sub mini_mangle_asm_hppa {
1479 local($in_asmf, $out_asmf) = @_;
1481 open(INASM, "< $in_asmf")
1482 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
1483 open(OUTASM,"> $out_asmf")
1484 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
1487 s/_info,DATA/_info,CODE/; # Move _info references to code space
1493 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1494 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1500 sub tidy_up_and_die {
1501 local($return_val, $msg) = @_;
1503 exit (($return_val == 0) ? 0 : 1);