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.
19 The HP linker is very picky about symbols being in the appropriate
20 space (code vs. data). When we mangle the threaded code to put the
21 info tables just prior to the code, they wind up in code space
22 rather than data space. This means that references to *_info from
23 un-mangled parts of the RTS (e.g. unthreaded GC code) get
24 unresolved symbols. Solution: mini-mangler for .c files on HP. I
25 think this should really be triggered in the driver by a new -rts
26 option, so that user code doesn't get mangled inappropriately.
28 With reversed tables, jumps are to the _info label rather than to
29 the _entry label. The _info label is just an address in code
30 space, rather than an entry point with the descriptive blob we
31 talked about yesterday. As a result, you can't use the call-style
32 JMP_ macro. However, some JMP_ macros take _info labels as targets
33 and some take code entry points within the RTS. The latter won't
34 work with the goto-style JMP_ macro. Sigh. Solution: Use the goto
35 style JMP_ macro, and mangle some more assembly, changing all
36 "RP'literal" and "LP'literal" references to "R'literal" and
37 "L'literal," so that you get the real address of the code, rather
38 than the descriptive blob. Also change all ".word P%literal"
39 entries in info tables and vector tables to just ".word literal,"
40 for the same reason. Advantage: No more ridiculous call sequences.
43 %************************************************************************
45 \subsection{Constants for various architectures}
47 %************************************************************************
50 sub init_TARGET_STUFF {
52 #--------------------------------------------------------#
53 if ( $TargetPlatform =~ /^alpha-.*-.*/ ) {
55 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
56 $T_US = ''; # _ if symbols have an underscore on the front
57 $T_DO_GC = 'PerformGC_wrapper';
58 $T_PRE_APP = 'DONT THINK THIS APPLIES'; # regexp that says what comes before APP/NO_APP
59 $T_CONST_LBL = '^\$C(\d+):$'; # regexp for what such a lbl looks like
62 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.(globl|ent)\s+\S+|\#.*|\.(file|loc)\s+\S+\s+\S+|\.text|\.r?data)\n)';
63 $T_COPY_DIRVS = '^\s*(\#|\.(file|globl|ent|loc))';
65 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
66 $T_DOT_WORD = '\.quad';
67 $T_DOT_GLOBAL = '^\t\.globl';
68 $T_HDR_literal = "\.rdata\n\t\.align 3\n";
69 $T_HDR_misc = "\.text\n\t\.align 3\n";
70 $T_HDR_data = "\.data\n\t\.align 3\n";
71 $T_HDR_consist = "\.text\n";
72 $T_HDR_closure = "\.data\n\t\.align 3\n";
73 $T_HDR_info = "\.text\n\t\.align 3\n";
74 $T_HDR_entry = "\.text\n\t\.align 3\n";
75 $T_HDR_fast = "\.text\n\t\.align 3\n";
76 $T_HDR_vector = "\.text\n\t\.align 3\n";
77 $T_HDR_direct = "\.text\n\t\.align 3\n";
79 #--------------------------------------------------------#
80 } elsif ( $TargetPlatform =~ /^hppa/ ) {
82 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
83 $T_US = ''; # _ if symbols have an underscore on the front
84 $T_DO_GC = 'PerformGC_wrapper';
85 $T_PRE_APP = 'DONT THINK THIS APPLIES'; # regexp that says what comes before APP/NO_APP
86 $T_CONST_LBL = '^L\$C(\d+)$'; # regexp for what such a lbl looks like
89 $T_MOVE_DIRVS = '^((\s+\.(IMPORT|EXPORT|PARAM).*|\s+\.align\s+\d+|\s+\.(SPACE|SUBSPA)\s+\S+|\s*)\n)';
90 $T_COPY_DIRVS = '^\s+\.(IMPORT|EXPORT)';
92 $T_hsc_cc_PAT = '\.STRING.*\)(hsc|cc) (.*)\\\\x09(.*)\\\\x00';
93 $T_DOT_WORD = '\.word';
94 $T_DOT_GLOBAL = '^\s+\.EXPORT';
95 $T_HDR_literal = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$LIT\$\n";
96 $T_HDR_misc = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
97 $T_HDR_data = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
98 $T_HDR_consist = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$LIT\$\n";
99 $T_HDR_closure = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
100 $T_HDR_info = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
101 $T_HDR_entry = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
102 $T_HDR_fast = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
103 $T_HDR_vector = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
104 $T_HDR_direct = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
106 #--------------------------------------------------------#
107 } elsif ( $TargetPlatform =~ /^i386-.*-(linuxaout|freebsd)/ ) {
109 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
110 $T_US = '_'; # _ if symbols have an underscore on the front
111 $T_DO_GC = '_PerformGC_wrapper';
112 $T_PRE_APP = '^#'; # regexp that says what comes before APP/NO_APP
113 $T_CONST_LBL = '^LC(\d+):$';
115 $T_X86_PRE_LLBL_PAT = 'L';
116 $T_X86_PRE_LLBL = 'L';
117 $T_X86_BADJMP = '^\tjmp [^L\*]';
119 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+(,0x90)?|\.globl\s+\S+|\.text|\.data|\.stab[^n].*|\.type\s+.*|\.size\s+.*)\n)';
120 $T_COPY_DIRVS = '\.(globl|stab)';
121 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
122 $T_DOT_WORD = '\.long';
123 $T_DOT_GLOBAL = '\.globl';
124 $T_HDR_literal = "\.text\n\t\.align 2\n";
125 $T_HDR_misc = "\.text\n\t\.align 2,0x90\n";
126 $T_HDR_data = "\.data\n\t\.align 2\n";
127 $T_HDR_consist = "\.text\n";
128 $T_HDR_closure = "\.data\n\t\.align 2\n";
129 $T_HDR_info = "\.text\n\t\.align 2\n"; # NB: requires padding
130 $T_HDR_entry = "\.text\n"; # no .align so we're right next to _info (arguably wrong...?)
131 $T_HDR_fast = "\.text\n\t\.align 2,0x90\n";
132 $T_HDR_vector = "\.text\n\t\.align 2\n"; # NB: requires padding
133 $T_HDR_direct = "\.text\n\t\.align 2,0x90\n";
135 #--------------------------------------------------------#
136 } elsif ( $TargetPlatform =~ /^i386-.*-(solaris2|linux)$/ ) {
138 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
139 $T_US = ''; # _ if symbols have an underscore on the front
140 $T_DO_GC = 'PerformGC_wrapper';
141 $T_PRE_APP = # regexp that says what comes before APP/NO_APP
142 ($TargetPlatform =~ /-linux$/) ? '#' : '/' ;
143 $T_CONST_LBL = '^\.LC(\d+):$'; # regexp for what such a lbl looks like
145 $T_X86_PRE_LLBL_PAT = '\.L';
146 $T_X86_PRE_LLBL = '.L';
147 $T_X86_BADJMP = '^\tjmp [^\.\*]';
149 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+(,0x90)?|\.globl\s+\S+|\.text|\.data|\.section\s+.*|\.type\s+.*|\.Lfe.*\n\t\.size\s+.*|\.size\s+.*|\.ident.*)\n)';
150 $T_COPY_DIRVS = '\.(globl)';
152 $T_hsc_cc_PAT = '\.string.*\)(hsc|cc) (.*)\\\\t(.*)"';
153 $T_DOT_WORD = '\.long';
154 $T_DOT_GLOBAL = '\.globl';
155 $T_HDR_literal = "\.section\t\.rodata\n"; # or just use .text??? (WDP 95/11)
156 $T_HDR_misc = "\.text\n\t\.align 16\n";
157 $T_HDR_data = "\.data\n\t\.align 4\n"; # ToDo: change align??
158 $T_HDR_consist = "\.text\n";
159 $T_HDR_closure = "\.data\n\t\.align 4\n"; # ToDo: change align?
160 $T_HDR_info = "\.text\n\t\.align 16\n"; # NB: requires padding
161 $T_HDR_entry = "\.text\n"; # no .align so we're right next to _info (arguably wrong...?)
162 $T_HDR_fast = "\.text\n\t\.align 16\n";
163 $T_HDR_vector = "\.text\n\t\.align 16\n"; # NB: requires padding
164 $T_HDR_direct = "\.text\n\t\.align 16\n";
166 #--------------------------------------------------------#
167 } elsif ( $TargetPlatform =~ /^m68k-.*-sunos4/ ) {
169 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
170 $T_US = '_'; # _ if symbols have an underscore on the front
171 $T_DO_GC = '_PerformGC_wrapper';
172 $T_PRE_APP = '^# MAY NOT APPLY'; # regexp that says what comes before APP/NO_APP
173 $T_CONST_LBL = '^LC(\d+):$';
176 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.proc\s+\d+|\.const|\.cstring|\.globl\s+\S+|\.text|\.data|\.even|\.stab[^n].*)\n)';
177 $T_COPY_DIRVS = '\.(globl|proc|stab)';
178 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
180 $T_DOT_WORD = '\.long';
181 $T_DOT_GLOBAL = '\.globl';
182 $T_HDR_literal = "\.text\n\t\.even\n";
183 $T_HDR_misc = "\.text\n\t\.even\n";
184 $T_HDR_data = "\.data\n\t\.even\n";
185 $T_HDR_consist = "\.text\n";
186 $T_HDR_closure = "\.data\n\t\.even\n";
187 $T_HDR_info = "\.text\n\t\.even\n";
188 $T_HDR_entry = "\.text\n\t\.even\n";
189 $T_HDR_fast = "\.text\n\t\.even\n";
190 $T_HDR_vector = "\.text\n\t\.even\n";
191 $T_HDR_direct = "\.text\n\t\.even\n";
193 #--------------------------------------------------------#
194 } elsif ( $TargetPlatform =~ /^mips-.*/ ) {
196 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
197 $T_US = ''; # _ if symbols have an underscore on the front
198 $T_DO_GC = 'PerformGC_wrapper';
199 $T_PRE_APP = '^\s*#'; # regexp that says what comes before APP/NO_APP
200 $T_CONST_LBL = '^\$LC(\d+):$'; # regexp for what such a lbl looks like
203 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.(globl|ent)\s+\S+|\.text|\.r?data)\n)';
204 $T_COPY_DIRVS = '\.(globl|ent)';
206 $T_hsc_cc_PAT = 'I WAS TOO LAZY TO DO THIS BIT (WDP 95/05)';
207 $T_DOT_WORD = '\.word';
208 $T_DOT_GLOBAL = '^\t\.globl';
209 $T_HDR_literal = "\t\.rdata\n\t\.align 2\n";
210 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
211 $T_HDR_data = "\t\.data\n\t\.align 2\n";
212 $T_HDR_consist = 'TOO LAZY TO DO THIS TOO';
213 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
214 $T_HDR_info = "\t\.text\n\t\.align 2\n";
215 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
216 $T_HDR_fast = "\t\.text\n\t\.align 2\n";
217 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
218 $T_HDR_direct = "\t\.text\n\t\.align 2\n";
220 #--------------------------------------------------------#
221 } elsif ( $TargetPlatform =~ /^powerpc-.*/ ) {
223 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
224 $T_US = ''; # _ if symbols have an underscore on the front
225 $T_DO_GC = 'PerformGC_wrapper';
226 $T_PRE_APP = 'NOT APPLICABLE'; # regexp that says what comes before APP/NO_APP
227 $T_CONST_LBL = '^LC\.\.(\d+):$'; # regexp for what such a lbl looks like
230 $T_MOVE_DIRVS = '^(\s*(\.toc|.csect \S+|\.l?globl \S+|\.align \d+)\n)';
231 $T_COPY_DIRVS = '\.(l?globl)';
233 $T_hsc_cc_PAT = '\.string.*\)(hsc|cc) (.*)\\\\t(.*)"';
234 $T_DOT_WORD = '\.long';
235 $T_DOT_GLOBAL = '\.globl';
236 $T_HDR_literal = "\.section\t\.rodata\n";
237 $T_HDR_misc = "\.text\n\t\.align 2\n";
238 $T_HDR_data = "\.data\n\t\.align 2\n";
239 $T_HDR_consist = "\.text\n";
240 $T_HDR_closure = "\.data\n\t\.align 2\n";
241 $T_HDR_info = "\.text\n\t\.align 2\n";
242 $T_HDR_entry = "\.text\n";
243 $T_HDR_fast = "\.text\n\t\.align 2\n";
244 $T_HDR_vector = "\.text\n\t\.align 2\n";
245 $T_HDR_direct = "\.text\n\t\.align 2\n";
247 #--------------------------------------------------------#
248 } elsif ( $TargetPlatform =~ /^sparc-.*-solaris2/ ) {
250 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
251 $T_US = ''; # _ if symbols have an underscore on the front
252 $T_DO_GC = 'PerformGC_wrapper';
253 $T_PRE_APP = 'DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
254 $T_CONST_LBL = '^\.LLC(\d+):$'; # regexp for what such a lbl looks like
257 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.stab.*|\.section.*|\s+\.type.*|\s+\.size.*)\n)';
258 $T_COPY_DIRVS = '\.(global|proc|stab)';
260 $T_hsc_cc_PAT = '\.asciz.*\)(hsc|cc) (.*)\\\\t(.*)"';
261 $T_DOT_WORD = '\.word';
262 $T_DOT_GLOBAL = '^\t\.global';
263 $T_HDR_literal = "\.text\n\t\.align 8\n";
264 $T_HDR_misc = "\.text\n\t\.align 4\n";
265 $T_HDR_data = "\.data\n\t\.align 8\n";
266 $T_HDR_consist = "\.text\n";
267 $T_HDR_closure = "\.data\n\t\.align 4\n";
268 $T_HDR_info = "\.text\n\t\.align 4\n";
269 $T_HDR_entry = "\.text\n\t\.align 4\n";
270 $T_HDR_fast = "\.text\n\t\.align 4\n";
271 $T_HDR_vector = "\.text\n\t\.align 4\n";
272 $T_HDR_direct = "\.text\n\t\.align 4\n";
274 #--------------------------------------------------------#
275 } elsif ( $TargetPlatform =~ /^sparc-.*-sunos4/ ) {
277 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
278 $T_US = '_'; # _ if symbols have an underscore on the front
279 $T_DO_GC = '_PerformGC_wrapper';
280 $T_PRE_APP = '^# DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
281 $T_CONST_LBL = '^LC(\d+):$';
284 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.stab.*)\n)';
285 $T_COPY_DIRVS = '\.(global|proc|stab)';
286 $T_hsc_cc_PAT = '\.ascii.*\)(hsc|cc) (.*)\\\\11"\n\t\.ascii\s+"(.*)\\\\0"';
288 $T_DOT_WORD = '\.word';
289 $T_DOT_GLOBAL = '^\t\.global';
290 $T_HDR_literal = "\.text\n\t\.align 8\n";
291 $T_HDR_misc = "\.text\n\t\.align 4\n";
292 $T_HDR_data = "\.data\n\t\.align 8\n";
293 $T_HDR_consist = "\.text\n";
294 $T_HDR_closure = "\.data\n\t\.align 4\n";
295 $T_HDR_info = "\.text\n\t\.align 4\n";
296 $T_HDR_entry = "\.text\n\t\.align 4\n";
297 $T_HDR_fast = "\.text\n\t\.align 4\n";
298 $T_HDR_vector = "\.text\n\t\.align 4\n";
299 $T_HDR_direct = "\.text\n\t\.align 4\n";
301 #--------------------------------------------------------#
303 print STDERR "$Pgm: don't know how to mangle assembly language for: $TargetPlatform\n";
308 print STDERR "T_STABBY: $T_STABBY\n";
309 print STDERR "T_US: $T_US\n";
310 print STDERR "T_DO_GC: $T_DO_GC\n";
311 print STDERR "T_PRE_APP: $T_PRE_APP\n";
312 print STDERR "T_CONST_LBL: $T_CONST_LBL\n";
313 print STDERR "T_POST_LBL: $T_POST_LBL\n";
314 if ( $TargetPlatform =~ /^i386-/ ) {
315 print STDERR "T_X86_PRE_LLBL_PAT: $T_X86_PRE_LLBL_PAT\n";
316 print STDERR "T_X86_PRE_LLBL: $T_X86_PRE_LLBL\n";
317 print STDERR "T_X86_BADJMP: $T_X86_BADJMP\n";
319 print STDERR "T_MOVE_DIRVS: $T_MOVE_DIRVS\n";
320 print STDERR "T_COPY_DIRVS: $T_COPY_DIRVS\n";
321 print STDERR "T_hsc_cc_PAT: $T_hsc_cc_PAT\n";
322 print STDERR "T_DOT_WORD: $T_DOT_WORD\n";
323 print STDERR "T_HDR_literal: $T_HDR_literal\n";
324 print STDERR "T_HDR_misc: $T_HDR_misc\n";
325 print STDERR "T_HDR_data: $T_HDR_data\n";
326 print STDERR "T_HDR_consist: $T_HDR_consist\n";
327 print STDERR "T_HDR_closure: $T_HDR_closure\n";
328 print STDERR "T_HDR_info: $T_HDR_info\n";
329 print STDERR "T_HDR_entry: $T_HDR_entry\n";
330 print STDERR "T_HDR_fast: $T_HDR_fast\n";
331 print STDERR "T_HDR_vector: $T_HDR_vector\n";
332 print STDERR "T_HDR_direct: $T_HDR_direct\n";
338 %************************************************************************
340 \subsection{Mangle away}
342 %************************************************************************
346 local($in_asmf, $out_asmf) = @_;
348 # multi-line regexp matching:
351 &init_TARGET_STUFF();
352 &init_FUNNY_THINGS();
354 open(INASM, "< $in_asmf")
355 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
356 open(OUTASM,"> $out_asmf")
357 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
359 # read whole file, divide into "chunks":
360 # record some info about what we've found...
362 @chk = (); # contents of the chunk
363 $numchks = 0; # number of them
364 @chkcat = (); # what category of thing in each chunk
365 @chksymb = (); # what symbol(base) is defined in this chunk
366 %slowchk = (); # ditto, its regular "slow" entry code
367 %fastchk = (); # ditto, fast entry code
368 %closurechk = (); # ditto, the (static) closure
369 %infochk = (); # given a symbol base, say what chunk its info tbl is in
370 %vectorchk = (); # ditto, return vector table
371 %directchk = (); # ditto, direct return code
372 $EXTERN_DECLS = ''; # .globl <foo> .text (MIPS only)
374 $i = 0; $chkcat[0] = 'misc'; $chk[0] = '';
377 next if $T_STABBY && /^\.stab.*${T_US}__stg_split_marker/o;
378 next if $T_STABBY && /^\.stab.*ghc.*c_ID/;
379 next if /${T_PRE_APP}(NO_)?APP/o;
381 next if /^;/ && $TargetPlatform =~ /^hppa/;
383 next if /(^$|^\t\.file\t|^ # )/ && $TargetPlatform =~ /^(mips|powerpc)-/;
385 last if /^_section_\.text:$/ && $TargetPlatform =~ /^powerpc-/;
387 if ( $TargetPlatform =~ /^mips-/
388 && /^\t\.(globl \S+ \.text|comm\t)/ ) {
389 $EXTERN_DECLS .= $_ unless /(__DISCARD__|\b(PK_|ASSIGN_)(FLT|DBL)\b)/;
391 } elsif ( /^\s+/ ) { # most common case first -- a simple line!
392 # duplicated from the bottom
396 } elsif ( /\.\.ng:$/ && $TargetPlatform =~ /^alpha-/ ) {
397 # Alphas: Local labels not to be confused with new chunks
400 # NB: all the rest start with a non-space
402 } elsif ( $TargetPlatform =~ /^mips-/
403 && /^\d+:/ ) { # a funny-looking very-local label
406 } elsif ( /$T_CONST_LBL/o ) {
408 $chkcat[$i] = 'literal';
411 } elsif ( /^${T_US}__stg_split_marker(\d+)${T_POST_LBL}$/o ) {
413 $chkcat[$i] = 'splitmarker';
416 } elsif ( /^${T_US}([A-Za-z0-9_]+)_info${T_POST_LBL}$/o ) {
419 $chkcat[$i] = 'infotbl';
420 $chksymb[$i] = $symb;
422 die "Info table already? $symb; $i\n" if defined($infochk{$symb});
424 $infochk{$symb} = $i;
426 } elsif ( /^${T_US}([A-Za-z0-9_]+)_entry${T_POST_LBL}$/o ) {
428 $chkcat[$i] = 'slow';
433 } elsif ( /^${T_US}([A-Za-z0-9_]+)_fast\d+${T_POST_LBL}$/o ) {
435 $chkcat[$i] = 'fast';
440 } elsif ( /^${T_US}([A-Za-z0-9_]+)_closure${T_POST_LBL}$/o ) {
442 $chkcat[$i] = 'closure';
445 $closurechk{$1} = $i;
447 } elsif ( /^${T_US}ghc.*c_ID${T_POST_LBL}/o ) {
449 $chkcat[$i] = 'consist';
451 } elsif ( /^(${T_US}__gnu_compiled_c|gcc2_compiled\.)${T_POST_LBL}/o ) {
454 } elsif ( /^${T_US}ErrorIO_call_count${T_POST_LBL}$/o # HACK!!!!
455 || /^${T_US}[A-Za-z0-9_]+\.\d+${T_POST_LBL}$/o
456 || /^${T_US}.*_CAT${T_POST_LBL}$/o # PROF: _entryname_CAT
457 || /^${T_US}CC_.*_struct${T_POST_LBL}$/o # PROF: _CC_ccident_struct
458 || /^${T_US}.*_done${T_POST_LBL}$/o # PROF: _module_done
459 || /^${T_US}_module_registered${T_POST_LBL}$/o # PROF: _module_registered
462 $chkcat[$i] = 'data';
465 } elsif ( /^([A-Za-z0-9_]+)\s+\.comm/ && $TargetPlatform =~ /^hppa/ ) {
470 } elsif ( /^${T_US}(ret_|djn_)/o ) {
472 $chkcat[$i] = 'misc';
475 } elsif ( /^${T_US}vtbl_([A-Za-z0-9_]+)${T_POST_LBL}$/o ) {
477 $chkcat[$i] = 'vector';
482 } elsif ( /^${T_US}([A-Za-z0-9_]+)DirectReturn${T_POST_LBL}$/o ) {
484 $chkcat[$i] = 'direct';
489 } elsif ( /^${T_US}[A-Za-z0-9_]+_upd${T_POST_LBL}$/o ) {
491 $chkcat[$i] = 'misc';
494 } elsif ( $TargetPlatform =~ /^i386-.*-solaris2/
495 && /^(_uname|uname|stat|fstat):/ ) {
496 # for some utterly bizarre reason, this platform
497 # likes to drop little local C routines with these names
498 # into each and every .o file that #includes the
499 # relevant system .h file. Yuck. We just don't
500 # tolerate them in .hc files (which we are processing
501 # here). If you need to call one of these things from
502 # Haskell, make a call to your own C wrapper, then
503 # put that C wrapper (which calls one of these) in a
504 # plain .c file. WDP 95/12
506 $chkcat[$i] = 'toss';
509 } elsif ( /^${T_US}[A-Za-z0-9_]/o
510 && ( $TargetPlatform !~ /^hppa/ # need to avoid local labels in this case
512 && ( $TargetPlatform !~ /^powerpc/ # ditto
513 || ! /^(L\.\.\d+|LT\.\..*):$/ ) ) {
516 print STDERR "Funny global thing?: $_"
517 unless $KNOWN_FUNNY_THING{$thing}
518 || /^${T_US}_(PRIn|PRStart).*${T_POST_LBL}$/o # pointer reversal GC routines
519 || /^${T_US}CC_.*${T_POST_LBL}$/o # PROF: _CC_ccident
520 || /^${T_US}_reg.*${T_POST_LBL}$/o; # PROF: __reg<module>
522 $chkcat[$i] = 'misc';
525 } else { # simple line (duplicated at the top)
530 $numchks = $#chk + 1;
532 # the division into chunks is imperfect;
533 # we throw some things over the fence into the next
536 # also, there are things we would like to know
537 # about the whole module before we start spitting
540 local($FIRST_MANGLABLE) = ($TargetPlatform =~ /^(alpha-|hppa|mips-)/) ? 1 : 0;
542 # print STDERR "first chunk to mangle: $FIRST_MANGLABLE\n";
544 # Alphas: NB: we start meddling at chunk 1, not chunk 0
545 # The first ".rdata" is quite magical; as of GCC 2.7.x, it
546 # spits a ".quad 0" in after the v first ".rdata"; we
547 # detect this special case (tossing the ".quad 0")!
548 local($magic_rdata_seen) = 0;
550 # HPPAs, MIPSen: also start medding at chunk 1
552 for ($i = $FIRST_MANGLABLE; $i < $numchks; $i++) {
553 $c = $chk[$i]; # convenience copy
555 # print STDERR "\nCHK $i (BEFORE) (",$chkcat[$i],"):\n", $c;
557 # toss all prologue stuff; HPPA is pretty weird
559 $c = &mash_hppa_prologue($c) if $TargetPlatform =~ /^hppa/;
561 # be slightly paranoid to make sure there's
562 # nothing surprising in there
563 if ( $c =~ /--- BEGIN ---/ ) {
564 if (($p, $r) = split(/--- BEGIN ---/, $c)) {
566 if ($TargetPlatform =~ /^i386-/) {
567 $p =~ s/^\tpushl \%edi\n//;
568 $p =~ s/^\tpushl \%esi\n//;
569 $p =~ s/^\tsubl \$\d+,\%esp\n//;
570 } elsif ($TargetPlatform =~ /^m68k-/) {
571 $p =~ s/^\tlink a6,#-?\d.*\n//;
572 $p =~ s/^\tmovel d2,sp\@-\n//;
573 $p =~ s/^\tmovel d5,sp\@-\n//; # SMmark.* only?
574 $p =~ s/^\tmoveml \#0x[0-9a-f]+,sp\@-\n//; # SMmark.* only?
575 } elsif ($TargetPlatform =~ /^mips-/) {
576 # the .frame/.mask/.fmask that we use is the same
577 # as that produced by GCC for miniInterpret; this
578 # gives GDB some chance of figuring out what happened
579 $FRAME = "\t.frame\t\$sp,2168,\$31\n\t.mask\t0x90000000,-4\n\t.fmask\t0x00000000,0\n";
580 $p =~ s/^\t\.(frame).*\n/__FRAME__/g;
581 $p =~ s/^\t\.(mask|fmask).*\n//g;
582 $p =~ s/^\t\.cprestore.*\n/\t\.cprestore 416\n/; # 16 + 100 4-byte args
583 $p =~ s/^\tsubu\t\$sp,\$sp,\d+\n//;
584 $p =~ s/^\tsw\t\$31,\d+\(\$sp\)\n//;
585 $p =~ s/^\tsw\t\$fp,\d+\(\$sp\)\n//;
586 $p =~ s/^\tsw\t\$28,\d+\(\$sp\)\n//;
587 $p =~ s/__FRAME__/$FRAME/;
589 print STDERR "$Pgm: unknown prologue mangling? $TargetPlatform\n";
592 die "Prologue junk?: $p\n" if $p =~ /^\t[^\.]/
593 && $TargetPlatform !~ /^powerpc-/; #ToDo: remove test
595 # glue together what's left
597 $c =~ s/\n\t\n/\n/; # junk blank line
601 if ( $TargetPlatform =~ /^mips-/ ) {
602 # MIPS: first, this basic sequence may occur "--- END ---" or not
603 $c =~ s/^\tlw\t\$31,\d+\(\$sp\)\n\taddu\t\$sp,\$sp,\d+\n\tj\t\$31\n\t\.end/\t\.end/;
606 # toss all epilogue stuff; again, paranoidly
607 if ( $c =~ /--- END ---/ ) {
608 if (($r, $e) = split(/--- END ---/, $c)) {
609 if ($TargetPlatform =~ /^i386-/) {
611 $e =~ s/^\tpopl \%edi\n//;
612 $e =~ s/^\tpopl \%esi\n//;
613 $e =~ s/^\taddl \$\d+,\%esp\n//;
614 } elsif ($TargetPlatform =~ /^m68k-/) {
615 $e =~ s/^\tunlk a6\n//;
617 } elsif ($TargetPlatform =~ /^mips-/) {
618 $e =~ s/^\tlw\t\$31,\d+\(\$sp\)\n//;
619 $e =~ s/^\tlw\t\$fp,\d+\(\$sp\)\n//;
620 $e =~ s/^\taddu\t\$sp,\$sp,\d+\n//;
621 $e =~ s/^\tj\t\$31\n//;
623 print STDERR "$Pgm: unknown epilogue mangling? $TargetPlatform\n";
625 die "Epilogue junk?: $e\n" if $e =~ /^\t[^\.]/
626 && $TargetPlatform !~ /^powerpc-/; #ToDo: remove test
628 # glue together what's left
630 $c =~ s/\n\t\n/\n/; # junk blank line
634 # On SPARCs, we don't do --- BEGIN/END ---, we just
635 # toss the register-windowing save/restore/ret* instructions
637 if ( $TargetPlatform =~ /^sparc-/ ) {
638 $c =~ s/^\t(save .*|restore|ret|retl)\n//g;
639 # throw away PROLOGUE comments
640 $c =~ s/^\t!#PROLOGUE# 0\n\t!#PROLOGUE# 1\n//;
643 # On Alphas, the prologue mangling is done a little later (below)
645 # toss all calls to __DISCARD__
646 $c =~ s/^\t(call|jbsr|jal)\s+${T_US}__DISCARD__\n//go;
648 # MIPS: that may leave some gratuitous asm macros around
649 # (no harm done; but we get rid of them to be tidier)
650 $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/
651 if $TargetPlatform =~ /^mips-/;
653 # toss stack adjustment after DoSparks
654 $c =~ s/^(\tjbsr _DoSparks\n)\taddqw #8,sp/$1/g
655 if $TargetPlatform =~ /^m68k-/; # this looks old...
657 if ( $TargetPlatform =~ /^alpha-/ &&
658 ! $magic_rdata_seen &&
659 $c =~ /^\s*\.rdata\n\t\.quad 0\n\t\.align \d\n/ ) {
660 $c =~ s/^\s*\.rdata\n\t\.quad 0\n\t\.align (\d)\n/\.rdata\n\t\.align $1\n/;
661 $magic_rdata_seen = 1;
664 # pick some end-things and move them to the next chunk
666 # pin a funny end-thing on (for easier matching):
667 $c .= 'FUNNY#END#THING';
669 while ( $c =~ /${T_MOVE_DIRVS}FUNNY#END#THING/o ) {
671 if ( $i < ($numchks - 1)
672 && ( $to_move =~ /${T_COPY_DIRVS}/
673 || ($TargetPlatform =~ /^hppa/ && $to_move =~ /align/ && $chkcat[$i+1] eq 'literal') )) {
674 $chk[$i + 1] = $to_move . $chk[$i + 1];
675 # otherwise they're tossed
678 $c =~ s/${T_MOVE_DIRVS}FUNNY#END#THING/FUNNY#END#THING/o;
681 if ( $TargetPlatform =~ /^alpha-/ && $c =~ /^\t\.ent\s+(\S+)/ ) {
683 # toss all prologue stuff, except for loading gp, and the ..ng address
684 if (($p, $r) = split(/^\t\.prologue/, $c)) {
685 if (($keep, $junk) = split(/\.\.ng:/, $p)) {
686 $c = $keep . "..ng:\n";
688 print STDERR "malformed code block ($ent)?\n"
691 $c .= "\t.frame \$30,0,\$26,0\n\t.prologue" . $r;
694 $c =~ s/FUNNY#END#THING//;
696 # print STDERR "\nCHK $i (AFTER) (",$chkcat[$i],"):\n", $c;
698 $chk[$i] = $c; # update w/ convenience copy
701 if ( $TargetPlatform =~ /^alpha-/ ) {
702 # print out the header stuff first
703 $chk[0] =~ s/^(\t\.file.*)"(ghc\d+\.c)"/$1"$ifile_root.hc"/;
704 print OUTASM $chk[0];
706 } elsif ( $TargetPlatform =~ /^hppa/ ) {
707 print OUTASM $chk[0];
709 } elsif ( $TargetPlatform =~ /^mips-/ ) {
710 $chk[0] = "\t\.file\t1 \"$ifile_root.hc\"\n" . $chk[0];
712 # get rid of horrible "<dollar>Revision: .*$" strings
713 local(@lines0) = split(/\n/, $chk[0]);
715 while ( $z <= $#lines0 ) {
716 if ( $lines0[$z] =~ /^\t\.byte\t0x24,0x52,0x65,0x76,0x69,0x73,0x69,0x6f$/ ) {
719 while ( $z <= $#lines0 ) {
721 last if $lines0[$z] =~ /[,\t]0x0$/;
727 $chk[0] = join("\n", @lines0);
728 $chk[0] =~ s/\n\n+/\n/;
729 print OUTASM $chk[0];
732 # print out all the literal strings next
733 for ($i = 0; $i < $numchks; $i++) {
734 if ( $chkcat[$i] eq 'literal' ) {
735 print OUTASM $T_HDR_literal, $chk[$i];
736 print OUTASM "; end literal\n" if $TargetPlatform =~ /^hppa/; # for the splitter
738 $chkcat[$i] = 'DONE ALREADY';
742 # on the HPPA, print out all the bss next
743 if ( $TargetPlatform =~ /^hppa/ ) {
744 for ($i = 1; $i < $numchks; $i++) {
745 if ( $chkcat[$i] eq 'bss' ) {
746 print OUTASM "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$BSS\$\n\t.align 4\n";
747 print OUTASM $chk[$i];
749 $chkcat[$i] = 'DONE ALREADY';
754 for ($i = $FIRST_MANGLABLE; $i < $numchks; $i++) {
755 # print STDERR "$i: cat $chkcat[$i], symb $chksymb[$i]\n";
757 next if $chkcat[$i] eq 'DONE ALREADY';
759 if ( $chkcat[$i] eq 'misc' ) {
760 if ($chk[$i] ne '') {
761 print OUTASM $T_HDR_misc;
762 &print_doctored($chk[$i], 0);
765 } elsif ( $chkcat[$i] eq 'toss' ) {
766 print STDERR "*** NB: TOSSING code for $chksymb[$i] !!! ***\n";
768 } elsif ( $chkcat[$i] eq 'data' ) {
769 if ($chk[$i] ne '') {
770 print OUTASM $T_HDR_data;
771 print OUTASM $chk[$i];
774 } elsif ( $chkcat[$i] eq 'consist' ) {
775 if ( $chk[$i] =~ /$T_hsc_cc_PAT/o ) {
776 local($consist) = "$1.$2.$3";
778 $consist =~ s/\//./g;
780 $consist =~ s/[^A-Za-z0-9_.]/ZZ/g; # ToDo: properly?
781 print OUTASM $T_HDR_consist, "${consist}${T_POST_LBL}\n";
783 } elsif ( $TargetPlatform !~ /^(mips|powerpc)-/ ) { # we just don't try in those case (ToDo)
784 # on mips: consistency string is just a v
785 # horrible bunch of .bytes,
786 # which I am too lazy to sort out (WDP 95/05)
788 print STDERR "Couldn't grok consistency: ", $chk[$i];
791 } elsif ( $chkcat[$i] eq 'splitmarker' ) {
792 # we can just re-constitute this one...
793 # NB: we emit _three_ underscores no matter what,
794 # so ghc-split doesn't have to care.
795 print OUTASM "___stg_split_marker",$chksymb[$i],"${T_POST_LBL}\n";
797 } elsif ( $chkcat[$i] eq 'closure'
798 || $chkcat[$i] eq 'infotbl'
799 || $chkcat[$i] eq 'slow'
800 || $chkcat[$i] eq 'fast' ) { # do them in that order
801 $symb = $chksymb[$i];
804 if ( defined($closurechk{$symb}) ) {
805 print OUTASM $T_HDR_closure;
806 print OUTASM $chk[$closurechk{$symb}];
807 $chkcat[$closurechk{$symb}] = 'DONE ALREADY';
811 if ( defined($infochk{$symb}) ) {
813 print OUTASM $T_HDR_info;
814 print OUTASM &rev_tbl($symb, $chk[$infochk{$symb}], 1);
815 # entry code will be put here!
818 if ( $chk[$infochk{$symb}] =~ /${T_DOT_WORD}\s+([A-Za-z0-9_]+_entry)$/o
819 && $1 ne "${T_US}${symb}_entry" ) {
820 print STDERR "!!! entry point???\n",$chk[$infochk{$symb}];
823 $chkcat[$infochk{$symb}] = 'DONE ALREADY';
827 if ( defined($slowchk{$symb}) ) {
829 # teach it to drop through to the fast entry point:
830 $c = $chk[$slowchk{$symb}];
832 if ( defined($fastchk{$symb}) ) {
833 if ( $TargetPlatform =~ /^alpha-/ ) {
834 $c =~ s/^\tjmp \$31,\(\$27\),0\n\t\.align 4\n\t\.end/\t.align 4\n\t.end/;
835 } elsif ( $TargetPlatform =~ /^hppa/ ) {
836 $c =~ s/^\s+ldil.*\n\s+ldo.*\n\s+bv.*\n(.*\n)?\s+\.EXIT/$1\t.EXIT/;
837 } elsif ( $TargetPlatform =~ /^i386-/ ) {
838 $c =~ s/^\tmovl \$${T_US}${symb}_fast\d+,\%edx\n\tjmp \*\%edx\n//;
839 $c =~ s/^\tmovl \$${T_US}${symb}_fast\d+,\%eax\n\tjmp \*\%eax\n//;
840 } elsif ( $TargetPlatform =~ /^mips-/ ) {
841 $c =~ s/^\tjmp \$31,\(\$27\),0\n\t\.align 4\n\t\.end/\t.align 4\n\t.end/;
842 } elsif ( $TargetPlatform =~ /^m68k-/ ) {
843 $c =~ s/^\tjmp ${T_US}${symb}_fast\d+.*\n\tnop\n//;
844 $c =~ s/^\tjmp ${T_US}${symb}_fast\d+.*\n//;
845 } elsif ( $TargetPlatform =~ /^sparc-/ ) {
846 $c =~ s/^\tcall ${T_US}${symb}_fast\d+,.*\n\tnop\n//;
847 $c =~ s/^\tcall ${T_US}${symb}_fast\d+,.*\n(\t[a-z].*\n)/$1/;
849 print STDERR "$Pgm: mystery slow-fast dropthrough: $TargetPlatform\n";
853 if ( $TargetPlatform !~ /^(alpha-|hppa|mips-)/ ) {
854 # On alphas, hppa: no very good way to look for "dangling"
855 # references to fast-entry point.
856 # (questionable re hppa and mips...)
857 print STDERR "still has jump to fast entry point:\n$c"
858 if $c =~ /${T_US}${symb}_fast/; # NB: paranoia
861 print OUTASM $T_HDR_entry;
863 &print_doctored($c, 1); # NB: the 1!!!
865 $chkcat[$slowchk{$symb}] = 'DONE ALREADY';
869 if ( defined($fastchk{$symb}) ) {
870 if ( ! defined($slowchk{$symb})
871 # ToDo: the || clause can go once we're no longer
872 # concerned about producing exactly the same output as before
873 #OLD: || $TargetPlatform =~ /^(m68k|sparc|i386)-/
875 print OUTASM $T_HDR_fast;
877 &print_doctored($chk[$fastchk{$symb}], 0);
878 $chkcat[$fastchk{$symb}] = 'DONE ALREADY';
881 } elsif ( $chkcat[$i] eq 'vector'
882 || $chkcat[$i] eq 'direct' ) { # do them in that order
883 $symb = $chksymb[$i];
886 if ( defined($vectorchk{$symb}) ) {
887 print OUTASM $T_HDR_vector;
888 print OUTASM &rev_tbl($symb, $chk[$vectorchk{$symb}], 0);
889 # direct return code will be put here!
890 $chkcat[$vectorchk{$symb}] = 'DONE ALREADY';
894 if ( defined($directchk{$symb}) ) {
895 print OUTASM $T_HDR_direct;
896 &print_doctored($chk[$directchk{$symb}], 0);
897 $chkcat[$directchk{$symb}] = 'DONE ALREADY';
899 } elsif ( $TargetPlatform =~ /^alpha-/ ) {
900 # Alphas: the commented nop is for the splitter, to ensure
901 # that no module ends with a label as the very last
902 # thing. (The linker will adjust the label to point
903 # to the first code word of the next module linked in,
904 # even if alignment constraints cause the label to move!)
906 print OUTASM "\t# nop\n";
910 &tidy_up_and_die(1,"$Pgm: unknown chkcat (ghc-asm: $TargetPlatform)\n$chkcat[$i]\n$chk[$i]\n");
914 print OUTASM $EXTERN_DECLS if $TargetPlatform =~ /^mips-/;
916 print OUTASM ".csect .text[PR]\n_section_.text:\n.csect .data[RW]\n\t.long _section_.text\n"
917 if $TargetPlatform =~ /^powerpc-/;
920 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
921 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
926 sub mash_hppa_prologue { # OK, epilogue, too
929 # toss all prologue stuff
930 s/^\s+\.ENTRY[^\0]*--- BEGIN ---/\t.ENTRY/;
932 # Lie about our .CALLINFO
933 s/^\s+\.CALLINFO.*$/\t.CALLINFO NO_CALLS,NO_UNWIND/;
940 # toss all epilogue stuff
941 s/^\s+--- END ---[^\0]*\.EXIT/\t.EXIT/;
943 # Sorry; we moved the _info stuff to the code segment.
944 s/_info,DATA/_info,CODE/g;
952 local($_, $need_fallthru_patch) = @_;
954 if ( $TargetPlatform !~ /^i386-/
955 || ! /^\t[a-z]/ ) { # no instructions in here, apparently
959 # OK, must do some x86 **HACKING**
961 local($entry_patch) = '';
962 local($exit_patch) = '';
963 local($call_entry_patch)= '';
964 local($call_exit_patch) = '';
966 #OLD: # first, convert calls to *very magic form*: (ToDo: document
970 # call _?PerformGC_wrapper
974 # call _?PerformGC_wrapper
976 # The reason we do this now is to remove the apparent use of
977 # %esp, which would throw off the "what patch code do we need"
980 # Special macros in ghc/includes/COptWraps.lh, used in
981 # ghc/runtime/CallWrap_C.lc, are required for this to work!
984 s/^\tpushl \$(\d+)\n\tcall ${T_DO_GC}\n\taddl \$4,\%esp\n/\tmovl \$$1,\%eax\n\tcall ${T_DO_GC}\n/go;
985 s/^\tpushl \%eax\n\tcall ${T_DO_GC}\n\taddl \$4,\%esp\n/\tcall ${T_DO_GC}\n/go;
986 s/^\tpushl \%edx\n\tcall ${T_DO_GC}\n\taddl \$4,\%esp\n/\tmovl \%edx,\%eax\n\tcall ${T_DO_GC}\n/go;
988 #= if ( $StolenX86Regs <= 4 ) { # %ecx is ordinary reg
989 #= s/^\tpushl \%ecx\n\tcall ${T_DO_GC}\n\taddl \$4,\%esp\n/\tmovl \%ecx,\%eax\n\tcall ${T_DO_GC}\n/go;
992 # gotta watch out for weird instructions that
993 # invisibly smash various regs:
994 # rep* %ecx used for counting
995 # scas* %edi used for destination index
996 # cmps* %e[sd]i used for indices
997 # loop* %ecx used for counting
1002 # * use of STG reg [ nn(%ebx) ] where no machine reg avail
1004 # * GCC used an "STG reg" for its own purposes
1006 # * some secret uses of machine reg, requiring STG reg
1007 # to be saved/restored
1009 # The most dangerous "GCC uses" of an "STG reg" are when
1010 # the reg holds the target of a jmp -- it's tricky to
1011 # insert the patch-up code before we get to the target!
1012 # So here we change the jmps:
1014 # --------------------------------------------------------
1015 # it can happen that we have jumps of the form...
1016 # jmp *<something involving %esp>
1018 # jmp <something involving another naughty register...>
1020 # a reasonably-common case is:
1022 # movl $_blah,<bad-reg>
1025 # which is easily fixed as:
1027 # sigh! try to hack around it...
1030 if ($StolenX86Regs <= 2 ) { # YURGH! spurious uses of esi?
1031 s/^\tmovl (.*),\%esi\n\tjmp \*%esi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1032 s/^\tjmp \*(-?\d*)\((.*\%esi.*)\)\n/\tmovl $2,\%eax\n\tjmp \*$1\(\%eax\)\n/g;
1033 s/^\tjmp \*\%esi\n/\tmovl \%esi,\%eax\n\tjmp \*\%eax\n/g;
1034 die "$Pgm: (mangler) still have jump involving \%esi!\n$_"
1035 if /(jmp|call) .*\%esi/;
1037 if ($StolenX86Regs <= 3 ) { # spurious uses of edi?
1038 s/^\tmovl (.*),\%edi\n\tjmp \*%edi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1039 s/^\tjmp \*(-?\d*)\((.*\%edi.*)\)\n/\tmovl $2,\%eax\n\tjmp \*$1\(\%eax\)\n/g;
1040 s/^\tjmp \*\%edi\n/\tmovl \%edi,\%eax\n\tjmp \*\%eax\n/g;
1041 die "$Pgm: (mangler) still have jump involving \%edi!\n$_"
1042 if /(jmp|call) .*\%edi/;
1044 #= if ($StolenX86Regs <= 4 ) { # spurious uses of ecx?
1045 #= s/^\tmovl (.*),\%ecx\n\tjmp \*%ecx\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1046 #= s/^\tjmp \*(-?\d*)\((.*\%ecx.*)\)\n/\tmovl $2,\%eax\n\tjmp \*$1\(\%eax\)\n/g;
1047 #= s/^\tjmp \*\%ecx\n/\tmovl \%ecx,\%eax\n\tjmp \*\%eax\n/g;
1048 #= die "$Pgm: (mangler) still have jump involving \%ecx!\n$_"
1049 #= if /(jmp|call) .*\%ecx/;
1052 # OK, now we can decide what our patch-up code is going to
1054 if ( $StolenX86Regs <= 2
1055 && ( /32\(\%ebx\)/ || /\%esi/ || /^\tcmps/ ) ) { # R1 (esi)
1056 $entry_patch .= "\tmovl \%esi,32(\%ebx)\n";
1057 $exit_patch .= "\tmovl 32(\%ebx),\%esi\n";
1058 # nothing for call_{entry,exit} because %esi is callee-save
1060 if ( $StolenX86Regs <= 3
1061 && ( /64\(\%ebx\)/ || /\%edi/ || /^\t(scas|cmps)/ ) ) { # SpA (edi)
1062 $entry_patch .= "\tmovl \%edi,64(\%ebx)\n";
1063 $exit_patch .= "\tmovl 64(\%ebx),\%edi\n";
1064 # nothing for call_{entry,exit} because %edi is callee-save
1066 #= if ( $StolenX86Regs <= 4
1067 #= && ( /80\(\%ebx\)/ || /\%ecx/ || /^\t(rep|loop)/ ) ) { # Hp (ecx)
1068 #= $entry_patch .= "\tmovl \%ecx,80(\%ebx)\n";
1069 #= $exit_patch .= "\tmovl 80(\%ebx),\%ecx\n";
1071 #= $call_exit_patch .= "\tmovl \%ecx,108(\%ebx)\n";
1072 #= $call_entry_patch .= "\tmovl 108(\%ebx),\%ecx\n";
1073 #= # I have a really bad feeling about this if we ever
1074 #= # have a nested call...
1075 #= # NB: should just hide it somewhere in the C stack.
1077 # --------------------------------------------------------
1078 # next, here we go with non-%esp patching!
1080 s/^(\t[a-z])/$entry_patch$1/; # before first instruction
1081 s/^(\tcall .*\n(\taddl \$\d+,\%esp\n)?)/$call_exit_patch$1$call_entry_patch/g; # _all_ calls
1083 # fix _all_ non-local jumps:
1085 s/^\tjmp \*${T_X86_PRE_LLBL_PAT}/\tJMP___SL/go;
1086 s/^\tjmp ${T_X86_PRE_LLBL_PAT}/\tJMP___L/go;
1088 s/^(\tjmp .*\n)/$exit_patch$1/g; # here's the fix...
1090 s/^\tJMP___SL/\tjmp \*${T_X86_PRE_LLBL}/go;
1091 s/^\tJMP___L/\tjmp ${T_X86_PRE_LLBL}/go;
1093 # fix post-PerformGC wrapper (re-)entries ???
1095 if ($StolenX86Regs == 2 ) {
1096 die "ARGH! Jump uses \%esi or \%edi with -monly-2-regs:\n$_"
1097 if /^\t(jmp|call) .*\%e(si|di)/;
1098 #= die "ARGH! Jump uses \%esi, \%edi, or \%ecx with -monly-2-regs:\n$_"
1099 #= if /^\t(jmp|call) .*\%e(si|di|cx)/;
1100 } elsif ($StolenX86Regs == 3 ) {
1101 die "ARGH! Jump uses \%edi with -monly-3-regs:\n$_"
1102 if /^\t(jmp|call) .*\%edi/;
1103 #= die "ARGH! Jump uses \%edi or \%ecx with -monly-3-regs:\n$_"
1104 #= if /^\t(jmp|call) .*\%e(di|cx)/;
1105 #= } elsif ($StolenX86Regs == 4 ) {
1106 #= die "ARGH! Jump uses \%ecx with -monly-4-regs:\n$_"
1107 #= if /^\t(jmp|call) .*\%ecx/;
1110 # final peephole fixes
1112 s/^\tmovl \%eax,36\(\%ebx\)\n\tjmp \*36\(\%ebx\)\n/\tmovl \%eax,36\(\%ebx\)\n\tjmp \*\%eax\n/;
1113 # the short form may tickle perl bug:
1114 # s/^\tmovl \$${T_US}(.*),(\%e[abcd]x)\n\tjmp \*$2/\tjmp $T_US$1/g;
1115 s/^\tmovl \$${T_US}(.*),\%eax\n\tjmp \*\%eax/\tjmp $T_US$1/g;
1116 s/^\tmovl \$${T_US}(.*),\%ebx\n\tjmp \*\%ebx/\tjmp $T_US$1/g;
1117 s/^\tmovl \$${T_US}(.*),\%ecx\n\tjmp \*\%ecx/\tjmp $T_US$1/g;
1118 s/^\tmovl \$${T_US}(.*),\%edx\n\tjmp \*\%edx/\tjmp $T_US$1/g;
1120 # Hacks to eliminate some reloads of Hp. Worth about 5% code size.
1121 # We could do much better than this, but at least it catches about
1122 # half of the unnecessary reloads.
1123 # Note that these will stop working if either:
1124 # (i) the offset of Hp from BaseReg changes from 80, or
1125 # (ii) the register assignment of BaseReg changes from %ebx
1127 s/^\tmovl 80\(\%ebx\),\%e.x\n\tmovl \$(.*),(-?[0-9]*)\(\%e.x\)\n\tmovl 80\(\%ebx\),\%e(.)x/\tmovl 80\(\%ebx\),\%e$3x\n\tmovl \$$1,$2\(\%e$3x\)/g;
1129 s/^\tmovl 80\(\%ebx\),\%e(.)x\n\tmovl (.*),\%e(.)x\n\tmovl \%e$3x,(-?[0-9]*\(\%e$1x\))\n\tmovl 80\(\%ebx\),\%e$1x/\tmovl 80\(\%ebx\),\%e$1x\n\tmovl $2,\%e$3x\n\tmovl \%e$3x,$4/g;
1131 s/^\tmovl 80\(\%ebx\),\%edx((\n\t(movl|addl) .*,((-?[0-9]*\(.*)|(\%e[abc]x)))+)\n\tmovl 80\(\%ebx\),\%edx/\tmovl 80\(\%ebx\),\%edx$1/g;
1132 s/^\tmovl 80\(\%ebx\),\%eax((\n\t(movl|addl) .*,((-?[0-9]*\(.*)|(\%e[bcd]x)))+)\n\tmovl 80\(\%ebx\),\%eax/\tmovl 80\(\%ebx\),\%eax$1/g;
1134 # --------------------------------------------------------
1135 # that's it -- print it
1137 #die "Funny jumps?\n$_" if /${T_X86_BADJMP}/o; # paranoia
1141 if ( $need_fallthru_patch ) { # exit patch for end of slow entry code
1142 print OUTASM $exit_patch;
1143 # ToDo: make it not print if there is a "jmp" at the end
1149 sub init_FUNNY_THINGS {
1150 %KNOWN_FUNNY_THING = (
1151 "${T_US}CheckHeapCode${T_POST_LBL}", 1,
1152 "${T_US}CommonUnderflow${T_POST_LBL}", 1,
1153 "${T_US}Continue${T_POST_LBL}", 1,
1154 "${T_US}EnterNodeCode${T_POST_LBL}", 1,
1155 "${T_US}ErrorIO_call_count${T_POST_LBL}", 1,
1156 "${T_US}ErrorIO_innards${T_POST_LBL}", 1,
1157 "${T_US}IndUpdRetDir${T_POST_LBL}", 1,
1158 "${T_US}IndUpdRetV0${T_POST_LBL}", 1,
1159 "${T_US}IndUpdRetV1${T_POST_LBL}", 1,
1160 "${T_US}IndUpdRetV2${T_POST_LBL}", 1,
1161 "${T_US}IndUpdRetV3${T_POST_LBL}", 1,
1162 "${T_US}IndUpdRetV4${T_POST_LBL}", 1,
1163 "${T_US}IndUpdRetV5${T_POST_LBL}", 1,
1164 "${T_US}IndUpdRetV6${T_POST_LBL}", 1,
1165 "${T_US}IndUpdRetV7${T_POST_LBL}", 1,
1166 "${T_US}PrimUnderflow${T_POST_LBL}", 1,
1167 "${T_US}StackUnderflowEnterNode${T_POST_LBL}", 1,
1168 "${T_US}StdErrorCode${T_POST_LBL}", 1,
1169 "${T_US}UnderflowVect0${T_POST_LBL}", 1,
1170 "${T_US}UnderflowVect1${T_POST_LBL}", 1,
1171 "${T_US}UnderflowVect2${T_POST_LBL}", 1,
1172 "${T_US}UnderflowVect3${T_POST_LBL}", 1,
1173 "${T_US}UnderflowVect4${T_POST_LBL}", 1,
1174 "${T_US}UnderflowVect5${T_POST_LBL}", 1,
1175 "${T_US}UnderflowVect6${T_POST_LBL}", 1,
1176 "${T_US}UnderflowVect7${T_POST_LBL}", 1,
1177 "${T_US}UpdErr${T_POST_LBL}", 1,
1178 "${T_US}UpdatePAP${T_POST_LBL}", 1,
1179 "${T_US}WorldStateToken${T_POST_LBL}", 1,
1180 "${T_US}_Enter_Internal${T_POST_LBL}", 1,
1181 "${T_US}_PRMarking_MarkNextAStack${T_POST_LBL}", 1,
1182 "${T_US}_PRMarking_MarkNextBStack${T_POST_LBL}", 1,
1183 "${T_US}_PRMarking_MarkNextCAF${T_POST_LBL}", 1,
1184 "${T_US}_PRMarking_MarkNextGA${T_POST_LBL}", 1,
1185 "${T_US}_PRMarking_MarkNextRoot${T_POST_LBL}", 1,
1186 "${T_US}_PRMarking_MarkNextSpark${T_POST_LBL}", 1,
1187 "${T_US}_PRMarking_MarkNextEvent${T_POST_LBL}", 1,
1188 "${T_US}_PRMarking_MarkNextClosureInFetchBuffer${T_POST_LBL}", 1,
1189 "${T_US}_Scavenge_Forward_Ref${T_POST_LBL}", 1,
1190 "${T_US}__std_entry_error__${T_POST_LBL}", 1,
1191 "${T_US}_startMarkWorld${T_POST_LBL}", 1,
1192 "${T_US}resumeThread${T_POST_LBL}", 1,
1193 "${T_US}startCcRegisteringWorld${T_POST_LBL}", 1,
1194 "${T_US}startEnterFloat${T_POST_LBL}", 1,
1195 "${T_US}startEnterInt${T_POST_LBL}", 1,
1196 "${T_US}startPerformIO${T_POST_LBL}", 1,
1197 "${T_US}startStgWorld${T_POST_LBL}", 1,
1198 "${T_US}stopPerformIO${T_POST_LBL}", 1
1203 The following table reversal is used for both info tables and return
1204 vectors. In both cases, we remove the first entry from the table,
1205 reverse the table, put the label at the end, and paste some code
1206 (that which is normally referred to by the first entry in the table)
1207 right after the table itself. (The code pasting is done elsewhere.)
1211 local($symb, $tbl, $discard1) = @_;
1213 local($before) = '';
1215 local(@imports) = (); # hppa only
1218 local(@lines) = split(/\n/, $tbl);
1219 local($i, $extra, $words_to_pad, $j);
1221 for ($i = 0; $i <= $#lines && $lines[$i] !~ /^\t${T_DOT_WORD}\s+/o; $i++) {
1222 $label .= $lines[$i] . "\n",
1223 next if $lines[$i] =~ /^[A-Za-z0-9_]+_info${T_POST_LBL}$/o
1224 || $lines[$i] =~ /${T_DOT_GLOBAL}/o
1225 || $lines[$i] =~ /^${T_US}vtbl_\S+${T_POST_LBL}$/o;
1227 $before .= $lines[$i] . "\n"; # otherwise...
1230 if ( $TargetPlatform !~ /^hppa/ ) {
1231 for ( ; $i <= $#lines && $lines[$i] =~ /^\t${T_DOT_WORD}\s+/o; $i++) {
1232 push(@words, $lines[$i]);
1234 } else { # hppa weirdness
1235 for ( ; $i <= $#lines && $lines[$i] =~ /^\s+\.(word|IMPORT)/; $i++) {
1236 if ($lines[$i] =~ /^\s+\.IMPORT/) {
1237 push(@imports, $lines[$i]);
1239 # We don't use HP's ``function pointers''
1240 # We just use labels in code space, like normal people
1241 $lines[$i] =~ s/P%//;
1242 push(@words, $lines[$i]);
1247 # now throw away the first word (entry code):
1248 shift(@words) if $discard1;
1250 # Padding removed to reduce code size and improve performance on Pentiums.
1252 # for 486-cache-friendliness, we want our tables aligned
1253 # on 16-byte boundaries (.align 4). Let's pad:
1254 # $extra = ($#words + 1) % 4;
1255 # $words_to_pad = ($extra == 0) ? 0 : 4 - $extra;
1256 # for ($j = 0; $j < $words_to_pad; $j++) { push(@words, "\t${T_DOT_WORD} 0"); }
1258 for (; $i <= $#lines; $i++) {
1259 $after .= $lines[$i] . "\n";
1262 # Alphas:If we have anonymous text (not part of a procedure), the
1263 # linker may complain about missing exception information. Bleh.
1264 if ( $TargetPlatform =~ /^alpha-/ && $label =~ /^([A-Za-z0-9_]+):$/) {
1265 $before = "\t.ent $1\n" . $before;
1266 $after .= "\t.end $1\n";
1270 . (($TargetPlatform !~ /^hppa/) ? '' : join("\n", @imports) . "\n")
1271 . join("\n", (reverse @words)) . "\n"
1274 # print STDERR "before=$before\n";
1275 # print STDERR "label=$label\n";
1276 # print STDERR "words=",(reverse @words),"\n";
1277 # print STDERR "after=$after\n";
1284 sub mini_mangle_asm_i386 {
1285 local($in_asmf, $out_asmf) = @_;
1287 &init_TARGET_STUFF();
1289 open(INASM, "< $in_asmf")
1290 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
1291 open(OUTASM,"> $out_asmf")
1292 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
1298 /^${T_US}(PerformGC|StackOverflow|Yield|PerformReschedule)_wrapper${T_POST_LBL}\n/o;
1299 print OUTASM "\tmovl \%esp, ${T_US}__temp_esp\n";
1300 print OUTASM "\tmovl \%eax, ${T_US}__temp_eax\n";
1304 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1305 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1309 The HP is a major nuisance. The threaded code mangler moved info
1310 tables from data space to code space, but unthreaded code in the RTS
1311 still has references to info tables in data space. Since the HP
1312 linker is very precise about where symbols live, we need to patch the
1313 references in the unthreaded RTS as well.
1316 sub mini_mangle_asm_hppa {
1317 local($in_asmf, $out_asmf) = @_;
1319 open(INASM, "< $in_asmf")
1320 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
1321 open(OUTASM,"> $out_asmf")
1322 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
1325 s/_info,DATA/_info,CODE/; # Move _info references to code space
1331 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1332 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1335 # make "require"r happy...