Source

go / src / cmd / 6l / l.h

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
// Inferno utils/6l/l.h
// http://code.google.com/p/inferno-os/source/browse/utils/6l/l.h
//
//	Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
//	Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
//	Portions Copyright © 1997-1999 Vita Nuova Limited
//	Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
//	Portions Copyright © 2004,2006 Bruce Ellis
//	Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
//	Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
//	Portions Copyright © 2009 The Go Authors.  All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#include	<u.h>
#include	<libc.h>
#include	<bio.h>
#include	"6.out.h"

#ifndef	EXTERN
#define	EXTERN	extern
#endif

enum
{
	thechar = '6',
	PtrSize = 8,
	IntSize = 8,
	
	// Loop alignment constants:
	// want to align loop entry to LoopAlign-byte boundary,
	// and willing to insert at most MaxLoopPad bytes of NOP to do so.
	// We define a loop entry as the target of a backward jump.
	//
	// gcc uses MaxLoopPad = 10 for its 'generic x86-64' config,
	// and it aligns all jump targets, not just backward jump targets.
	//
	// As of 6/1/2012, the effect of setting MaxLoopPad = 10 here
	// is very slight but negative, so the alignment is disabled by
	// setting MaxLoopPad = 0. The code is here for reference and
	// for future experiments.
	// 
	LoopAlign = 16,
	MaxLoopPad = 0,

	FuncAlign = 16
};

#define	P		((Prog*)0)
#define	S		((Sym*)0)
#define	TNAME		(cursym?cursym->name:noname)

typedef	struct	Adr	Adr;
typedef	struct	Prog	Prog;
typedef	struct	Sym	Sym;
typedef	struct	Auto	Auto;
typedef	struct	Optab	Optab;
typedef	struct	Movtab	Movtab;
typedef	struct	Reloc	Reloc;

struct	Adr
{
	union
	{
		vlong	u0offset;
		char	u0scon[8];
		Prog	*u0cond;	/* not used, but should be D_BRANCH */
		Ieee	u0ieee;
		char	*u0sbig;
	} u0;
	Sym*	sym;
	short	type;
	char	index;
	char	scale;
};

#define	offset	u0.u0offset
#define	scon	u0.u0scon
#define	cond	u0.u0cond
#define	ieee	u0.u0ieee
#define	sbig	u0.u0sbig

struct	Reloc
{
	int32	off;
	uchar	siz;
	int32	type;
	int64	add;
	Sym*	sym;
};

struct	Prog
{
	Adr	from;
	Adr	to;
	Prog*	forwd;
	Prog*	comefrom;
	Prog*	link;
	Prog*	pcond;	/* work on this */
	vlong	pc;
	int32	spadj;
	int32	line;
	short	as;
	char	ft;	/* oclass cache */
	char	tt;
	uchar	mark;	/* work on these */
	uchar	back;

	char	width;	/* fake for DATA */
	char	mode;	/* 16, 32, or 64 */
};
#define	datasize	from.scale
#define	textflag	from.scale
#define	iscall(p)	((p)->as == ACALL)

struct	Auto
{
	Sym*	asym;
	Auto*	link;
	int32	aoffset;
	short	type;
	Sym*	gotype;
};
struct	Sym
{
	char*	name;
	short	type;
	short	version;
	uchar	dupok;
	uchar	reachable;
	uchar	dynexport;
	uchar	special;
	uchar	stkcheck;
	uchar	hide;
	int32	dynid;
	int32	sig;
	int32	plt;
	int32	got;
	int32	align;	// if non-zero, required alignment in bytes
	Sym*	hash;	// in hash table
	Sym*	allsym;	// in all symbol list
	Sym*	next;	// in text or data list
	Sym*	sub;	// in SSUB list
	Sym*	outer;	// container of sub
	vlong	value;
	vlong	size;
	Sym*	gotype;
	char*	file;
	char*	dynimpname;
	char*	dynimplib;
	char*	dynimpvers;
	
	// STEXT
	Auto*	autom;
	Prog*	text;
	
	// SDATA, SBSS
	uchar*	p;
	int32	np;
	int32	maxp;
	Reloc*	r;
	int32	nr;
	int32	maxr;
};
struct	Optab
{
	short	as;
	uchar*	ytab;
	uchar	prefix;
	uchar	op[22];
};
struct	Movtab
{
	short	as;
	uchar	ft;
	uchar	tt;
	uchar	code;
	uchar	op[4];
};

enum
{
	MINSIZ		= 8,
	STRINGSZ	= 200,
	MINLC		= 1,
	MAXIO		= 8192,
	MAXHIST		= 20,				/* limit of path elements for history symbols */

	Yxxx		= 0,
	Ynone,
	Yi0,
	Yi1,
	Yi8,
	Ys32,
	Yi32,
	Yi64,
	Yiauto,
	Yal,
	Ycl,
	Yax,
	Ycx,
	Yrb,
	Yrl,
	Yrf,
	Yf0,
	Yrx,
	Ymb,
	Yml,
	Ym,
	Ybr,
	Ycol,

	Ycs,	Yss,	Yds,	Yes,	Yfs,	Ygs,
	Ygdtr,	Yidtr,	Yldtr,	Ymsw,	Ytask,
	Ycr0,	Ycr1,	Ycr2,	Ycr3,	Ycr4,	Ycr5,	Ycr6,	Ycr7,	Ycr8,
	Ydr0,	Ydr1,	Ydr2,	Ydr3,	Ydr4,	Ydr5,	Ydr6,	Ydr7,
	Ytr0,	Ytr1,	Ytr2,	Ytr3,	Ytr4,	Ytr5,	Ytr6,	Ytr7,	Yrl32,	Yrl64,
	Ymr, Ymm,
	Yxr, Yxm,
	Ymax,

	Zxxx		= 0,

	Zlit,
	Zlitm_r,
	Z_rp,
	Zbr,
	Zcall,
	Zib_,
	Zib_rp,
	Zibo_m,
	Zibo_m_xm,
	Zil_,
	Zil_rp,
	Ziq_rp,
	Zilo_m,
	Ziqo_m,
	Zjmp,
	Zloop,
	Zo_iw,
	Zm_o,
	Zm_r,
	Zm_r_xm,
	Zm_r_i_xm,
	Zm_r_3d,
	Zm_r_xm_nr,
	Zr_m_xm_nr,
	Zibm_r,	/* mmx1,mmx2/mem64,imm8 */
	Zmb_r,
	Zaut_r,
	Zo_m,
	Zo_m64,
	Zpseudo,
	Zr_m,
	Zr_m_xm,
	Zr_m_i_xm,
	Zrp_,
	Z_ib,
	Z_il,
	Zm_ibo,
	Zm_ilo,
	Zib_rr,
	Zil_rr,
	Zclr,
	Zbyte,
	Zmax,

	Px		= 0,
	P32		= 0x32,	/* 32-bit only */
	Pe		= 0x66,	/* operand escape */
	Pm		= 0x0f,	/* 2byte opcode escape */
	Pq		= 0xff,	/* both escape */
	Pb		= 0xfe,	/* byte operands */
	Pf2		= 0xf2,	/* xmm escape 1 */
	Pf3		= 0xf3,	/* xmm escape 2 */
	Pw		= 0x48,	/* Rex.w */
	Py		= 0x80,	/* defaults to 64-bit mode */

	Rxf		= 1<<9,	/* internal flag for Rxr on from */
	Rxt		= 1<<8,	/* internal flag for Rxr on to */
	Rxw		= 1<<3,	/* =1, 64-bit operand size */
	Rxr		= 1<<2,	/* extend modrm reg */
	Rxx		= 1<<1,	/* extend sib index */
	Rxb		= 1<<0,	/* extend modrm r/m, sib base, or opcode reg */

	Maxand	= 10,		/* in -a output width of the byte codes */
};

#pragma	varargck	type	"A"	uint
#pragma	varargck	type	"D"	Adr*
#pragma	varargck	type	"I"	uchar*
#pragma	varargck	type	"P"	Prog*
#pragma	varargck	type	"R"	int
#pragma	varargck	type	"S"	char*
#pragma	varargck	type	"i"	char*

EXTERN	int32	HEADR;
EXTERN	int32	HEADTYPE;
EXTERN	int32	INITRND;
EXTERN	vlong	INITTEXT;
EXTERN	vlong	INITDAT;
EXTERN	char*	INITENTRY;		/* entry point */
EXTERN	char*	pcstr;
EXTERN	Auto*	curauto;
EXTERN	Auto*	curhist;
EXTERN	Prog*	curp;
EXTERN	Sym*	cursym;
EXTERN	Sym*	datap;
EXTERN	vlong	elfdatsize;
EXTERN	char	debug[128];
EXTERN	char	literal[32];
EXTERN	Sym*	textp;
EXTERN	Sym*	etextp;
EXTERN	char	ycover[Ymax*Ymax];
EXTERN	uchar*	andptr;
EXTERN	uchar*	rexptr;
EXTERN	uchar	and[30];
EXTERN	int	reg[D_NONE];
EXTERN	int	regrex[D_NONE+1];
EXTERN	int32	lcsize;
EXTERN	int	nerrors;
EXTERN	char*	noname;
EXTERN	char*	outfile;
EXTERN	vlong	pc;
EXTERN	char*	interpreter;
EXTERN	char*	rpath;
EXTERN	int32	spsize;
EXTERN	Sym*	symlist;
EXTERN	int32	symsize;
EXTERN	int	tlsoffset;
EXTERN	int	version;
EXTERN	Prog	zprg;
EXTERN	int	dtype;
EXTERN	char*	paramspace;
EXTERN	Sym*	adrgotype;	// type symbol on last Adr read
EXTERN	Sym*	fromgotype;	// type symbol on last p->from read

EXTERN	vlong	textstksiz;
EXTERN	vlong	textarg;

extern	Optab	optab[];
extern	Optab*	opindex[];
extern	char*	anames[];

int	Aconv(Fmt*);
int	Dconv(Fmt*);
int	Iconv(Fmt*);
int	Pconv(Fmt*);
int	Rconv(Fmt*);
int	Sconv(Fmt*);
void	addhist(int32, int);
void	addstackmark(void);
Prog*	appendp(Prog*);
void	asmb(void);
void	asmdyn(void);
void	asmins(Prog*);
void	asmsym(void);
void	asmelfsym(void);
vlong	atolwhex(char*);
Prog*	brchain(Prog*);
Prog*	brloop(Prog*);
void	buildop(void);
Prog*	copyp(Prog*);
double	cputime(void);
void	datblk(int32, int32);
void	deadcode(void);
void	diag(char*, ...);
void	dodata(void);
void	doelf(void);
void	domacho(void);
void	doprof1(void);
void	doprof2(void);
void	dostkoff(void);
vlong	entryvalue(void);
void	follow(void);
void	gethunk(void);
void	gotypestrings(void);
void	listinit(void);
Sym*	lookup(char*, int);
void	lputb(int32);
void	lputl(int32);
void	instinit(void);
void	main(int, char*[]);
void*	mysbrk(uint32);
Prog*	newtext(Prog*, Sym*);
void	nopout(Prog*);
int	opsize(Prog*);
void	patch(void);
Prog*	prg(void);
void	parsetextconst(vlong);
int	relinv(int);
vlong	rnd(vlong, vlong);
void	span(void);
void	undef(void);
vlong	symaddr(Sym*);
void	vputb(uint64);
void	vputl(uint64);
void	wputb(uint16);
void	wputl(uint16);
void	xdefine(char*, int, vlong);

void	machseg(char*, vlong, vlong, vlong, vlong, uint32, uint32, uint32, uint32);
void	machsymseg(uint32, uint32);
void	machsect(char*, char*, vlong, vlong, uint32, uint32, uint32, uint32, uint32);
void	machstack(vlong);
void	machdylink(void);
uint32	machheadr(void);

/* Native is little-endian */
#define	LPUT(a)	lputl(a)
#define	WPUT(a)	wputl(a)
#define	VPUT(a)	vputl(a)

#pragma	varargck	type	"D"	Adr*
#pragma	varargck	type	"P"	Prog*
#pragma	varargck	type	"R"	int
#pragma	varargck	type	"Z"	char*
#pragma	varargck	type	"A"	int
#pragma	varargck	argpos	diag 1

/* Used by ../ld/dwarf.c */
enum
{
	DWARFREGSP = 7
};