u.out.h

这是一个同样来自贝尔实验室的和UNIX有着渊源的操作系统, 其简洁的设计和实现易于我们学习和理解

#define	NSNAME	8
#define	NSYM	50
#define	NREG	32
#define NOPROF	(1<<0)
#define DUPOK	(1<<1)

enum
{
	REGZERO		= 0,	/* always zero */
	REGSP		= 1,	/* stack pointer */
	REGSB		= 2,	/* static pointer */
	REGSB1		= 3,	/* (possible) second static pointer */
	REGEXT		= 6,	/* first external register, grows-- */
	REGRET		= 7,	/* return register and first temp, grows++ */
	REGTMP		= 14,	/* used by the loader */
	REGLINK		= 15,	/* subroutine linkage */
	REGARG		= 7,	/* first arg passed in */

	FREGRET		= 0,
	FREGEXT		= 22,	/* first external register */
	FREGZERO	= 24,	/* both float and double */
	FREGHALF	= 26,	/* double */
	FREGONE		= 28,	/* double */
	FREGTWO		= 30	/* double */
/*
 * GENERAL:
 *
 * compiler allocates R7 up as temps
 * compiler allocates external registers R6 down
 * compiler allocates register variables F4-F22
 * compiler allocates external registers F22 down
 */
};

enum	as
{
	AXXX	= 0,
	AADD,
	AADDCC,
	AADDX,
	AADDXCC,
	AAND,
	AANDCC,
	AANDN,
	AANDNCC,
	ABA,
	ABCC,
	ABCS,
	ABE,
	ABG,
	ABGE,
	ABGU,
	ABL,
	ABLE,
	ABLEU,
	ABN,
	ABNE,
	ABNEG,
	ABPOS,
	ABVC,
	ABVS,
	ACB0,
	ACB01,
	ACB012,
	ACB013,
	ACB02,
	ACB023,
	ACB03,
	ACB1,
	ACB12,
	ACB123,
	ACB13,
	ACB2,
	ACB23,
	ACB3,
	ACBA,
	ACBN,
	ACMP,		/* pseudo op */
	ACPOP1,
	ACPOP2,
	ADATA,
	ADIV,
	ADIVL,
	AFABSD,		/* pseudo op */
	AFABSF,
	AFABSX,		/* pseudo op */
	AFADDD,
	AFADDF,
	AFADDX,
	AFBA,
	AFBE,
	AFBG,
	AFBGE,
	AFBL,
	AFBLE,
	AFBLG,
	AFBN,
	AFBNE,
	AFBO,
	AFBU,
	AFBUE,
	AFBUG,
	AFBUGE,
	AFBUL,
	AFBULE,
	AFCMPD,
	AFCMPED,
	AFCMPEF,
	AFCMPEX,
	AFCMPF,
	AFCMPX,
	AFDIVD,
	AFDIVF,
	AFDIVX,
	AFMOVD,		/* pseudo op */
	AFMOVDF,
	AFMOVDW,
	AFMOVDX,
	AFMOVF,
	AFMOVFD,
	AFMOVFW,
	AFMOVFX,
	AFMOVWD,
	AFMOVWF,
	AFMOVWX,
	AFMOVX,		/* pseudo op */
	AFMOVXD,
	AFMOVXF,
	AFMOVXW,
	AFMULD,
	AFMULF,
	AFMULX,
	AFNEGD,		/* pseudo op */
	AFNEGF,
	AFNEGX,		/* pseudo op */
	AFSQRTD,
	AFSQRTF,
	AFSQRTX,
	AFSUBD,
	AFSUBF,
	AFSUBX,
	AGLOBL,
	AGOK,
	AHISTORY,
	AIFLUSH,
	AJMPL,
	AJMP,
	AMOD,
	AMODL,
	AMOVB,
	AMOVBU,
	AMOVD,
	AMOVH,
	AMOVHU,
	AMOVW,
	AMUL,
	AMULSCC,
				AXXXdummy,		// to temporarily make ANAME/ASIGNAME different than .k's
	ANAME,
	ANOP,
	AOR,
	AORCC,
	AORN,
	AORNCC,
	ARESTORE,
	ARETT,
	ARETURN,
	ASAVE,
	ASLL,
	ASRA,
	ASRL,
	ASUB,
	ASUBCC,
	ASUBX,
	ASUBXCC,
	ASWAP,
	ATA,
	ATADDCC,
	ATADDCCTV,
	ATAS,
	ATCC,
	ATCS,
	ATE,
	ATEXT,
	ATG,
	ATGE,
	ATGU,
	ATL,
	ATLE,
	ATLEU,
	ATN,
	ATNE,
	ATNEG,
	ATPOS,
	ATSUBCC,
	ATSUBCCTV,
	ATVC,
	ATVS,
	AUNIMP,
	AWORD,
	AXNOR,
	AXNORCC,
	AXOR,
	AXORCC,
	AEND,
	ADYNT,
	AINIT,
	ASIGNAME,
	ALAST
};

/* type/name */
enum
{
	D_GOK	= 0,
	D_NONE,

/* name */
	D_EXTERN,
	D_STATIC,
	D_AUTO,
	D_PARAM,

/* type */
	D_BRANCH,
	D_OREG,
	D_ASI,
	D_CONST,
	D_FCONST,
	D_SCONST,
	D_REG,
	D_FREG,
	D_CREG,
	D_PREG,
	D_FILE,
	D_FILE1,

/* reg names iff type is D_PREG */
	D_CPQ	= 0,
	D_CSR,
	D_FPQ,
	D_FSR,
	D_PSR,
	D_TBR,
	D_WIM,
	D_Y
};

/*
 * this is the ranlib header
 */
#define	SYMDEF	"__.SYMDEF"

/*
 * this is the simulated IEEE floating point
 */
typedef	struct	ieee	Ieee;
struct	ieee
{
	long	l;	/* contains ls-man	0xffffffff */
	long	h;	/* contains sign	0x80000000
				    exp		0x7ff00000
				    ms-man	0x000fffff */
};