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[/] [eco32/] [trunk/] [lcc/] [src/] [stab.c] - Blame information for rev 130

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Line No. Rev Author Line
1 4 hellwig
#include <string.h>
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#include <stdlib.h>
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#include "c.h"
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#include "stab.h"
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static char rcsid[] = "$Id: stab.c,v 1.1 2002/08/28 23:12:46 drh Exp $";
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static char *currentfile;       /* current file name */
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static int ntypes;
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extern Interface sparcIR;
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char *stabprefix = "L";
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extern char *stabprefix;
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extern void stabblock(int, int, Symbol*);
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extern void stabend(Coordinate *, Symbol, Coordinate **, Symbol *, Symbol *);
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extern void stabfend(Symbol, int);
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extern void stabinit(char *, int, char *[]);
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extern void stabline(Coordinate *);
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extern void stabsym(Symbol);
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extern void stabtype(Symbol);
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static void asgncode(Type, int);
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static void dbxout(Type);
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static int dbxtype(Type);
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static int emittype(Type, int, int);
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/* asgncode - assign type code to ty */
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static void asgncode(Type ty, int lev) {
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        if (ty->x.marked || ty->x.typeno)
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                return;
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        ty->x.marked = 1;
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        switch (ty->op) {
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        case VOLATILE: case CONST: case VOLATILE+CONST:
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                asgncode(ty->type, lev);
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                ty->x.typeno = ty->type->x.typeno;
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                break;
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        case POINTER: case FUNCTION: case ARRAY:
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                asgncode(ty->type, lev + 1);
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                /* fall thru */
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        case VOID: case INT: case UNSIGNED: case FLOAT:
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                break;
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        case STRUCT: case UNION: {
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                Field p;
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                for (p = fieldlist(ty); p; p = p->link)
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                        asgncode(p->type, lev + 1);
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                /* fall thru */
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        case ENUM:
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                if (ty->x.typeno == 0)
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                        ty->x.typeno = ++ntypes;
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                if (lev > 0 && (*ty->u.sym->name < '0' || *ty->u.sym->name > '9'))
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                        dbxout(ty);
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                break;
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                }
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        default:
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                assert(0);
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        }
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}
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/* dbxout - output .stabs entry for type ty */
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static void dbxout(Type ty) {
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        ty = unqual(ty);
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        if (!ty->x.printed) {
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                int col = 0;
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                print(".stabs \""), col += 8;
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                if (ty->u.sym && !(isfunc(ty) || isarray(ty) || isptr(ty)))
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                        print("%s", ty->u.sym->name), col += strlen(ty->u.sym->name);
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                print(":%c", isstruct(ty) || isenum(ty) ? 'T' : 't'), col += 2;
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                emittype(ty, 0, col);
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                print("\",%d,0,0,0\n", N_LSYM);
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        }
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}
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/* dbxtype - emit a stabs entry for type ty, return type code */
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static int dbxtype(Type ty) {
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        asgncode(ty, 0);
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        dbxout(ty);
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        return ty->x.typeno;
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}
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/*
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 * emittype - emit ty's type number, emitting its definition if necessary.
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 * Returns the output column number after emission; col is the approximate
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 * output column before emission and is used to emit continuation lines for long
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 * struct, union, and enum types. Continuations are not emitted for other types,
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 * even if the definition is long. lev is the depth of calls to emittype.
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 */
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static int emittype(Type ty, int lev, int col) {
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        int tc = ty->x.typeno;
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        if (isconst(ty) || isvolatile(ty)) {
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                col = emittype(ty->type, lev, col);
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                ty->x.typeno = ty->type->x.typeno;
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                ty->x.printed = 1;
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                return col;
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        }
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        if (tc == 0) {
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                ty->x.typeno = tc = ++ntypes;
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/*              fprint(2,"`%t'=%d\n", ty, tc); */
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        }
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        print("%d", tc), col += 3;
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        if (ty->x.printed)
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                return col;
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        ty->x.printed = 1;
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        switch (ty->op) {
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        case VOID:      /* void is defined as itself */
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                print("=%d", tc), col += 1+3;
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                break;
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        case INT:
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                if (ty == chartype)     /* plain char is a subrange of itself */
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                        print("=r%d;%d;%d;", tc, ty->u.sym->u.limits.min.i, ty->u.sym->u.limits.max.i),
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                                col += 2+3+2*2.408*ty->size+2;
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                else                    /* other signed ints are subranges of int */
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                        print("=r1;%D;%D;", ty->u.sym->u.limits.min.i, ty->u.sym->u.limits.max.i),
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                                col += 4+2*2.408*ty->size+2;
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                break;
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        case UNSIGNED:
119
                if (ty == chartype)     /* plain char is a subrange of itself */
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                        print("=r%d;0;%u;", tc, ty->u.sym->u.limits.max.i),
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                                col += 2+3+2+2.408*ty->size+1;
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                else                    /* other signed ints are subranges of int */
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                        print("=r1;0;%U;", ty->u.sym->u.limits.max.i),
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                                col += 4+2.408*ty->size+1;
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                break;
126
        case FLOAT:     /* float, double, long double get sizes, not ranges */
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                print("=r1;%d;0;", ty->size), col += 4+1+3;
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                break;
129
        case POINTER:
130
                print("=*"), col += 2;
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                col = emittype(ty->type, lev + 1, col);
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                break;
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        case FUNCTION:
134
                print("=f"), col += 2;
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                col = emittype(ty->type, lev + 1, col);
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                break;
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        case ARRAY:     /* array includes subscript as an int range */
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                if (ty->size && ty->type->size)
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                        print("=ar1;0;%d;", ty->size/ty->type->size - 1), col += 7+3+1;
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                else
141
                        print("=ar1;0;-1;"), col += 10;
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                col = emittype(ty->type, lev + 1, col);
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                break;
144
        case STRUCT: case UNION: {
145
                Field p;
146
                if (!ty->u.sym->defined) {
147
                        print("=x%c%s:", ty->op == STRUCT ? 's' : 'u', ty->u.sym->name);
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                        col += 2+1+strlen(ty->u.sym->name)+1;
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                        break;
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                }
151
                if (lev > 0 && (*ty->u.sym->name < '0' || *ty->u.sym->name > '9')) {
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                        ty->x.printed = 0;
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                        break;
154
                }
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                print("=%c%d", ty->op == STRUCT ? 's' : 'u', ty->size), col += 1+1+3;
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                for (p = fieldlist(ty); p; p = p->link) {
157
                        if (p->name)
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                                print("%s:", p->name), col += strlen(p->name)+1;
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                        else
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                                print(":"), col += 1;
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                        col = emittype(p->type, lev + 1, col);
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                        if (p->lsb)
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                                print(",%d,%d;", 8*p->offset +
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                                        (IR->little_endian ? fieldright(p) : fieldleft(p)),
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                                        fieldsize(p));
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                        else
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                                print(",%d,%d;", 8*p->offset, 8*p->type->size);
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                        col += 1+3+1+3+1;       /* accounts for ,%d,%d; */
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                        if (col >= 80 && p->link) {
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                                print("\\\\\",%d,0,0,0\n.stabs \"", N_LSYM);
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                                col = 8;
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                        }
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                }
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                print(";"), col += 1;
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                break;
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                }
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        case ENUM: {
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                Symbol *p;
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                if (lev > 0 && (*ty->u.sym->name < '0' || *ty->u.sym->name > '9')) {
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                        ty->x.printed = 0;
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                        break;
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                }
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                print("=e"), col += 2;
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                for (p = ty->u.sym->u.idlist; *p; p++) {
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                        print("%s:%d,", (*p)->name, (*p)->u.value), col += strlen((*p)->name)+3;
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                        if (col >= 80 && p[1]) {
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                                print("\\\\\",%d,0,0,0\n.stabs \"", N_LSYM);
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                                col = 8;
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                        }
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                }
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                print(";"), col += 1;
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                break;
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                }
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        default:
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                assert(0);
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        }
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        return col;
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}
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/* stabblock - output a stab entry for '{' or '}' at level lev */
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void stabblock(int brace, int lev, Symbol *p) {
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        if (brace == '{')
203
                while (*p)
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                        stabsym(*p++);
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        if (IR == &sparcIR)
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                print(".stabd 0x%x,0,%d\n", brace == '{' ? N_LBRAC : N_RBRAC, lev);
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        else {
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                int lab = genlabel(1);
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                print(".stabn 0x%x,0,%d,%s%d-%s\n", brace == '{' ? N_LBRAC : N_RBRAC, lev,
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                        stabprefix, lab, cfunc->x.name);
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                print("%s%d:\n", stabprefix, lab);
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        }
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}
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/* stabinit - initialize stab output */
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void stabinit(char *file, int argc, char *argv[]) {
217
        typedef void (*Closure)(Symbol, void *);
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219
        print(".stabs \"lcc4_compiled.\",0x%x,0,0,0\n", N_OPT);
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        if (file && *file) {
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                print(".stabs \"%s\",0x%x,0,3,%stext0\n", file, N_SO, stabprefix);
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                (*IR->segment)(CODE);
223
                print("%stext0:\n", stabprefix, N_SO);
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                currentfile = file;
225
        }
226
        dbxtype(inttype);
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        dbxtype(chartype);
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        dbxtype(doubletype);
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        dbxtype(floattype);
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        dbxtype(longdouble);
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        dbxtype(longtype);
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        dbxtype(longlong);
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        dbxtype(shorttype);
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        dbxtype(signedchar);
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        dbxtype(unsignedchar);
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        dbxtype(unsignedlong);
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        dbxtype(unsignedlonglong);
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        dbxtype(unsignedshort);
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        dbxtype(unsignedtype);
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        dbxtype(voidtype);
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        foreach(types, GLOBAL, (Closure)stabtype, NULL);
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}
243
 
244
/* stabline - emit stab entry for source coordinate *cp */
245
void stabline(Coordinate *cp) {
246
        if (cp->file && cp->file != currentfile) {
247
                int lab = genlabel(1);
248
                print(".stabs \"%s\",0x%x,0,0,%s%d\n", cp->file, N_SOL, stabprefix, lab);
249
                print("%s%d:\n", stabprefix, lab);
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                currentfile = cp->file;
251
        }
252
        if (IR == &sparcIR)
253
                print(".stabd 0x%x,0,%d\n", N_SLINE, cp->y);
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        else {
255
                int lab = genlabel(1);
256
                print(".stabn 0x%x,0,%d,%s%d-%s\n", N_SLINE, cp->y,
257
                        stabprefix, lab, cfunc->x.name);
258
                print("%s%d:\n", stabprefix, lab);
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        }
260
}
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262
/* stabsym - output a stab entry for symbol p */
263
void stabsym(Symbol p) {
264
        int code, tc, sz = p->type->size;
265
 
266
        if (p->generated || p->computed)
267
                return;
268
        if (isfunc(p->type)) {
269
                print(".stabs \"%s:%c%d\",%d,0,0,%s\n", p->name,
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                        p->sclass == STATIC ? 'f' : 'F', dbxtype(freturn(p->type)),
271
                        N_FUN, p->x.name);
272
                return;
273
        }
274
        if (!IR->wants_argb && p->scope == PARAM && p->structarg) {
275
                assert(isptr(p->type) && isstruct(p->type->type));
276
                tc = dbxtype(p->type->type);
277
                sz = p->type->type->size;
278
        } else
279
                tc = dbxtype(p->type);
280
        if (p->sclass == AUTO && p->scope == GLOBAL || p->sclass == EXTERN) {
281
                print(".stabs \"%s:G", p->name);
282
                code = N_GSYM;
283
        } else if (p->sclass == STATIC) {
284
                print(".stabs \"%s:%c%d\",%d,0,0,%s\n", p->name, p->scope == GLOBAL ? 'S' : 'V',
285
                        tc, p->u.seg == BSS ? N_LCSYM : N_STSYM, p->x.name);
286
                return;
287
        } else if (p->sclass == REGISTER) {
288
                if (p->x.regnode) {
289
                        int r = p->x.regnode->number;
290
                        if (p->x.regnode->set == FREG)
291
                                r += 32;        /* floating point */
292
                                print(".stabs \"%s:%c%d\",%d,0,", p->name,
293
                                        p->scope == PARAM ? 'P' : 'r', tc, N_RSYM);
294
                        print("%d,%d\n", sz, r);
295
                }
296
                return;
297
        } else if (p->scope == PARAM) {
298
                print(".stabs \"%s:p", p->name);
299
                code = N_PSYM;
300
        } else if (p->scope >= LOCAL) {
301
                print(".stabs \"%s:", p->name);
302
                code = N_LSYM;
303
        } else
304
                assert(0);
305
        print("%d\",%d,0,0,%s\n", tc, code,
306
                p->scope >= PARAM && p->sclass != EXTERN ? p->x.name : "0");
307
}
308
 
309
/* stabtype - output a stab entry for type *p */
310
void stabtype(Symbol p) {
311
        if (p->type) {
312
                if (p->sclass == 0)
313
                        dbxtype(p->type);
314
                else if (p->sclass == TYPEDEF)
315
                        print(".stabs \"%s:t%d\",%d,0,0,0\n", p->name, dbxtype(p->type), N_LSYM);
316
        }
317
}
318
 
319
/* stabend - finalize a function */
320
void stabfend(Symbol p, int lineno) {}
321
 
322
/* stabend - finalize stab output */
323
void stabend(Coordinate *cp, Symbol p, Coordinate **cpp, Symbol *sp, Symbol *stab) {
324
        (*IR->segment)(CODE);
325
        print(".stabs \"\", %d, 0, 0,%setext\n", N_SO, stabprefix);
326
        print("%setext:\n", stabprefix);
327
}

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