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Clean up the dwarf code.

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This commit is contained in:
rsc 2004-04-21 02:03:00 +00:00
parent 87a478a361
commit 95f57b01e2
5 changed files with 50 additions and 54 deletions
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90
src/libmach/dwarfinfo.c
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@ -121,13 +121,10 @@ dwarflookupnameinunit(Dwarf *d, ulong unit, char *name, DwarfSym *s)
if(dwarfenumunit(d, unit, s) < 0)
return -1;
dwarfnextsym(d, s, 1); /* s is now the CompileUnit */
if(dwarfnextsym(d, s, 1) == 1){ /* s is now the first child of the compile unit */
do{
if(s->attrs.name && strcmp(s->attrs.name, name) == 0)
return 0;
}while(dwarfnextsym(d, s, 0) == 1);
}
dwarfnextsymat(d, s, 0); /* s is now the CompileUnit */
while(dwarfnextsymat(d, s, 1) == 1)
if(s->attrs.name && strcmp(s->attrs.name, name) == 0)
return 0;
werrstr("symbol '%s' not found", name);
return -1;
}
@ -137,12 +134,9 @@ int
dwarflookupsubname(Dwarf *d, DwarfSym *parent, char *name, DwarfSym *s)
{
*s = *parent;
dwarfnextsym(d, s, 1);
if(s->depth == parent->depth+1)
do{
if(s->attrs.name && strcmp(s->attrs.name, name) == 0)
return 0;
}while(dwarfnextsym(d, s, 0) == 1);
while(dwarfnextsymat(d, s, parent->depth+1))
if(s->attrs.name && strcmp(s->attrs.name, name) == 0)
return 0;
werrstr("symbol '%s' not found", name);
return -1;
}
@ -153,16 +147,12 @@ dwarflookuptag(Dwarf *d, ulong unit, ulong tag, DwarfSym *s)
if(dwarfenumunit(d, unit, s) < 0)
return -1;
dwarfnextsym(d, s, 1); /* s is now the CompileUnit */
dwarfnextsymat(d, s, 0); /* s is now the CompileUnit */
if(s->attrs.tag == tag)
return 0;
if(dwarfnextsym(d, s, 1) == 1){ /* s is now the first child of the compile unit */
do{
if(s->attrs.tag == tag)
return 0;
}while(dwarfnextsym(d, s, 0) == 1);
}
while(dwarfnextsymat(d, s, 1) == 1)
if(s->attrs.tag == tag)
return 0;
werrstr("symbol with tag 0x%lux not found", tag);
return -1;
}
@ -173,7 +163,7 @@ dwarfseeksym(Dwarf *d, ulong unit, ulong off, DwarfSym *s)
if(dwarfenumunit(d, unit, s) < 0)
return -1;
s->b.p = d->info.data + unit + off;
if(dwarfnextsym(d, s, 1) != 1)
if(dwarfnextsymat(d, s, 0) != 1)
return -1;
return 0;
}
@ -184,17 +174,15 @@ dwarflookupfn(Dwarf *d, ulong unit, ulong pc, DwarfSym *s)
if(dwarfenumunit(d, unit, s) < 0)
return -1;
if(dwarfnextsym(d, s, 1) != 1)
if(dwarfnextsymat(d, s, 0) != 1)
return -1;
/* s is now the CompileUnit */
if(dwarfnextsym(d, s, 1) == 1){ /* s is now the first child of the compile unit */
do{
if(s->attrs.tag != TagSubprogram)
continue;
if(s->attrs.lowpc <= pc && pc < s->attrs.highpc)
return 0;
}while(dwarfnextsym(d, s, 0) == 1);
while(dwarfnextsymat(d, s, 1) == 1){
if(s->attrs.tag != TagSubprogram)
continue;
if(s->attrs.lowpc <= pc && pc < s->attrs.highpc)
return 0;
}
werrstr("fn containing pc 0x%lux not found", pc);
return -1;
@ -248,8 +236,8 @@ dwarfenum(Dwarf *d, DwarfSym *s)
return 0;
}
static int
_dwarfnextsym(Dwarf *d, DwarfSym *s)
int
dwarfnextsym(Dwarf *d, DwarfSym *s)
{
ulong num;
DwarfAbbrev *a;
@ -288,31 +276,39 @@ top:
}
int
dwarfnextsym(Dwarf *d, DwarfSym *s, int recurse)
dwarfnextsymat(Dwarf *d, DwarfSym *s, int depth)
{
int r;
int depth;
ulong sib;
DwarfSym t;
uint sib;
if(recurse)
return _dwarfnextsym(d, s);
depth = s->depth;
if(s->attrs.have.sibling){
if(s->depth == depth && s->attrs.have.sibling){
sib = s->attrs.sibling;
if(sib < d->info.len && d->info.data+sib >= s->b.p)
s->b.p = d->info.data+sib;
s->attrs.haskids = 0;
}
do{
r = _dwarfnextsym(d, s);
if(r <= 0)
/*
* The funny game with t and s make sure that
* if we get to the end of a run of a particular
* depth, we leave s so that a call to nextsymat with depth-1
* will actually produce the desired guy. We could change
* the interface to dwarfnextsym instead, but I'm scared
* to touch it.
*/
t = *s;
for(;;){
if((r = dwarfnextsym(d, &t)) != 1)
return r;
}while(s->depth != depth);
if(s->depth < depth)
return 0;
return 1;
if(t.depth < depth){
/* went too far - nothing to see */
return 0;
}
*s = t;
if(t.depth == depth)
return 1;
}
}
typedef struct Parse Parse;