Show stab.c syntax highlighted
#include <string.h>
#include <stdlib.h>
#include "c.h"
#include "stab.h"
static char *currentfile; /* current file name */
static int ntypes;
extern Interface sparcIR;
char *stabprefix = "L";
extern char *stabprefix;
extern void stabblock(int, int, Symbol*);
extern void stabend(Coordinate *, Symbol, Coordinate **, Symbol *, Symbol *);
extern void stabfend(Symbol, int);
extern void stabinit(char *, int, char *[]);
extern void stabline(Coordinate *);
extern void stabsym(Symbol);
extern void stabtype(Symbol);
static void asgncode(Type, int);
static void dbxout(Type);
static int dbxtype(Type);
static int emittype(Type, int, int);
/* asgncode - assign type code to ty */
static void asgncode(Type ty, int lev) {
if (ty->x.marked || ty->x.typeno)
return;
ty->x.marked = 1;
switch (ty->op) {
case VOLATILE: case CONST: case VOLATILE+CONST:
asgncode(ty->type, lev);
ty->x.typeno = ty->type->x.typeno;
break;
case POINTER: case FUNCTION: case ARRAY:
asgncode(ty->type, lev + 1);
/* fall thru */
case VOID: case INT: case UNSIGNED: case FLOAT:
break;
case STRUCT: case UNION: {
Field p;
for (p = fieldlist(ty); p; p = p->link)
asgncode(p->type, lev + 1);
/* fall thru */
case ENUM:
if (ty->x.typeno == 0)
ty->x.typeno = ++ntypes;
if (lev > 0 && (*ty->u.sym->name < '0' || *ty->u.sym->name > '9'))
dbxout(ty);
break;
}
default:
assert(0);
}
}
/* dbxout - output .stabs entry for type ty */
static void dbxout(Type ty) {
ty = unqual(ty);
if (!ty->x.printed) {
int col = 0;
print(".stabs \""), col += 8;
if (ty->u.sym && !(isfunc(ty) || isarray(ty) || isptr(ty)))
print("%s", ty->u.sym->name), col += strlen(ty->u.sym->name);
print(":%c", isstruct(ty) || isenum(ty) ? 'T' : 't'), col += 2;
emittype(ty, 0, col);
print("\",%d,0,0,0\n", N_LSYM);
}
}
/* dbxtype - emit a stabs entry for type ty, return type code */
static int dbxtype(Type ty) {
asgncode(ty, 0);
dbxout(ty);
return ty->x.typeno;
}
/*
* emittype - emit ty's type number, emitting its definition if necessary.
* Returns the output column number after emission; col is the approximate
* output column before emission and is used to emit continuation lines for long
* struct, union, and enum types. Continuations are not emitted for other types,
* even if the definition is long. lev is the depth of calls to emittype.
*/
static int emittype(Type ty, int lev, int col) {
int tc = ty->x.typeno;
if (isconst(ty) || isvolatile(ty)) {
col = emittype(ty->type, lev, col);
ty->x.typeno = ty->type->x.typeno;
ty->x.printed = 1;
return col;
}
if (tc == 0) {
ty->x.typeno = tc = ++ntypes;
/* fprint(2,"`%t'=%d\n", ty, tc); */
}
print("%d", tc), col += 3;
if (ty->x.printed)
return col;
ty->x.printed = 1;
switch (ty->op) {
case VOID: /* void is defined as itself */
print("=%d", tc), col += 1+3;
break;
case INT:
if (ty == chartype) /* plain char is a subrange of itself */
print("=r%d;%d;%d;", tc, ty->u.sym->u.limits.min.i, ty->u.sym->u.limits.max.i),
col += 2+3+2*2.408*ty->size+2;
else /* other signed ints are subranges of int */
print("=r1;%D;%D;", ty->u.sym->u.limits.min.i, ty->u.sym->u.limits.max.i),
col += 4+2*2.408*ty->size+2;
break;
case UNSIGNED:
if (ty == chartype) /* plain char is a subrange of itself */
print("=r%d;0;%u;", tc, ty->u.sym->u.limits.max.i),
col += 2+3+2+2.408*ty->size+1;
else /* other signed ints are subranges of int */
print("=r1;0;%U;", ty->u.sym->u.limits.max.i),
col += 4+2.408*ty->size+1;
break;
case FLOAT: /* float, double, long double get sizes, not ranges */
print("=r1;%d;0;", ty->size), col += 4+1+3;
break;
case POINTER:
print("=*"), col += 2;
col = emittype(ty->type, lev + 1, col);
break;
case FUNCTION:
print("=f"), col += 2;
col = emittype(ty->type, lev + 1, col);
break;
case ARRAY: /* array includes subscript as an int range */
if (ty->size && ty->type->size)
print("=ar1;0;%d;", ty->size/ty->type->size - 1), col += 7+3+1;
else
print("=ar1;0;-1;"), col += 10;
col = emittype(ty->type, lev + 1, col);
break;
case STRUCT: case UNION: {
Field p;
if (!ty->u.sym->defined) {
print("=x%c%s:", ty->op == STRUCT ? 's' : 'u', ty->u.sym->name);
col += 2+1+strlen(ty->u.sym->name)+1;
break;
}
if (lev > 0 && (*ty->u.sym->name < '0' || *ty->u.sym->name > '9')) {
ty->x.printed = 0;
break;
}
print("=%c%d", ty->op == STRUCT ? 's' : 'u', ty->size), col += 1+1+3;
for (p = fieldlist(ty); p; p = p->link) {
if (p->name)
print("%s:", p->name), col += strlen(p->name)+1;
else
print(":"), col += 1;
col = emittype(p->type, lev + 1, col);
if (p->lsb)
print(",%d,%d;", 8*p->offset +
(IR->little_endian ? fieldright(p) : fieldleft(p)),
fieldsize(p));
else
print(",%d,%d;", 8*p->offset, 8*p->type->size);
col += 1+3+1+3+1; /* accounts for ,%d,%d; */
if (col >= 80 && p->link) {
print("\\\\\",%d,0,0,0\n.stabs \"", N_LSYM);
col = 8;
}
}
print(";"), col += 1;
break;
}
case ENUM: {
Symbol *p;
if (lev > 0 && (*ty->u.sym->name < '0' || *ty->u.sym->name > '9')) {
ty->x.printed = 0;
break;
}
print("=e"), col += 2;
for (p = ty->u.sym->u.idlist; *p; p++) {
print("%s:%d,", (*p)->name, (*p)->u.value), col += strlen((*p)->name)+3;
if (col >= 80 && p[1]) {
print("\\\\\",%d,0,0,0\n.stabs \"", N_LSYM);
col = 8;
}
}
print(";"), col += 1;
break;
}
default:
assert(0);
}
return col;
}
/* stabblock - output a stab entry for '{' or '}' at level lev */
void stabblock(int brace, int lev, Symbol *p) {
if (brace == '{')
while (*p)
stabsym(*p++);
if (IR == &sparcIR)
print(".stabd 0x%x,0,%d\n", brace == '{' ? N_LBRAC : N_RBRAC, lev);
else {
int lab = genlabel(1);
print(".stabn 0x%x,0,%d,%s%d-%s\n", brace == '{' ? N_LBRAC : N_RBRAC, lev,
stabprefix, lab, cfunc->x.name);
print("%s%d:\n", stabprefix, lab);
}
}
/* stabinit - initialize stab output */
void stabinit(char *file, int argc, char *argv[]) {
typedef void (*Closure)(Symbol, void *);
extern char *getcwd(char *, size_t);
print(".stabs \"lcc4_compiled.\",0x%x,0,0,0\n", N_OPT);
if (file && *file) {
char buf[1024], *cwd = getcwd(buf, sizeof buf);
if (cwd)
print(".stabs \"%s/\",0x%x,0,3,%stext0\n", cwd, N_SO, stabprefix);
print(".stabs \"%s\",0x%x,0,3,%stext0\n", file, N_SO, stabprefix);
(*IR->segment)(CODE);
print("%stext0:\n", stabprefix, N_SO);
currentfile = file;
}
dbxtype(inttype);
dbxtype(chartype);
dbxtype(doubletype);
dbxtype(floattype);
dbxtype(longdouble);
dbxtype(longtype);
dbxtype(longlong);
dbxtype(shorttype);
dbxtype(signedchar);
dbxtype(unsignedchar);
dbxtype(unsignedlong);
dbxtype(unsignedlonglong);
dbxtype(unsignedshort);
dbxtype(unsignedtype);
dbxtype(voidtype);
foreach(types, GLOBAL, (Closure)stabtype, NULL);
}
/* stabline - emit stab entry for source coordinate *cp */
void stabline(Coordinate *cp) {
if (cp->file && cp->file != currentfile) {
int lab = genlabel(1);
print(".stabs \"%s\",0x%x,0,0,%s%d\n", cp->file, N_SOL, stabprefix, lab);
print("%s%d:\n", stabprefix, lab);
currentfile = cp->file;
}
if (IR == &sparcIR)
print(".stabd 0x%x,0,%d\n", N_SLINE, cp->y);
else {
int lab = genlabel(1);
print(".stabn 0x%x,0,%d,%s%d-%s\n", N_SLINE, cp->y,
stabprefix, lab, cfunc->x.name);
print("%s%d:\n", stabprefix, lab);
}
}
/* stabsym - output a stab entry for symbol p */
void stabsym(Symbol p) {
int code, tc, sz = p->type->size;
if (p->generated || p->computed)
return;
if (isfunc(p->type)) {
print(".stabs \"%s:%c%d\",%d,0,0,%s\n", p->name,
p->sclass == STATIC ? 'f' : 'F', dbxtype(freturn(p->type)),
N_FUN, p->x.name);
return;
}
if (!IR->wants_argb && p->scope == PARAM && p->structarg) {
assert(isptr(p->type) && isstruct(p->type->type));
tc = dbxtype(p->type->type);
sz = p->type->type->size;
} else
tc = dbxtype(p->type);
if (p->sclass == AUTO && p->scope == GLOBAL || p->sclass == EXTERN) {
print(".stabs \"%s:G", p->name);
code = N_GSYM;
} else if (p->sclass == STATIC) {
print(".stabs \"%s:%c%d\",%d,0,0,%s\n", p->name, p->scope == GLOBAL ? 'S' : 'V',
tc, p->u.seg == BSS ? N_LCSYM : N_STSYM, p->x.name);
return;
} else if (p->sclass == REGISTER) {
if (p->x.regnode) {
int r = p->x.regnode->number;
if (p->x.regnode->set == FREG)
r += 32; /* floating point */
print(".stabs \"%s:%c%d\",%d,0,", p->name,
p->scope == PARAM ? 'P' : 'r', tc, N_RSYM);
print("%d,%d\n", sz, r);
}
return;
} else if (p->scope == PARAM) {
print(".stabs \"%s:p", p->name);
code = N_PSYM;
} else if (p->scope >= LOCAL) {
print(".stabs \"%s:", p->name);
code = N_LSYM;
} else
assert(0);
print("%d\",%d,0,0,%s\n", tc, code,
p->scope >= PARAM && p->sclass != EXTERN ? p->x.name : "0");
}
/* stabtype - output a stab entry for type *p */
void stabtype(Symbol p) {
if (p->type) {
if (p->sclass == 0)
dbxtype(p->type);
else if (p->sclass == TYPEDEF)
print(".stabs \"%s:t%d\",%d,0,0,0\n", p->name, dbxtype(p->type), N_LSYM);
}
}
/* stabend - finalize a function */
void stabfend(Symbol p, int lineno) {}
/* stabend - finalize stab output */
void stabend(Coordinate *cp, Symbol p, Coordinate **cpp, Symbol *sp, Symbol *stab) {
(*IR->segment)(CODE);
print(".stabs \"\", %d, 0, 0,%setext\n", N_SO, stabprefix);
print("%setext:\n", stabprefix);
}
See more files for this project here