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| author | Rob Pike <r@golang.org> | 2008-06-13 18:15:30 -0700 |
|---|---|---|
| committer | Rob Pike <r@golang.org> | 2008-06-13 18:15:30 -0700 |
| commit | 849b2ab15afbe79d9865e55ead911003e4284425 (patch) | |
| tree | 24cdba1d893a8bb1ffa5e09db912ecc30ac69ef1 | |
| parent | 67dc1daeafedb2262e23852789437c30006ad8db (diff) | |
| download | go-849b2ab15afbe79d9865e55ead911003e4284425.tar.gz | |
hack to find first instruction for decoding the pc/line table properly.
SVN=122792
| -rw-r--r-- | src/libmach_amd64/sym.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/libmach_amd64/sym.c b/src/libmach_amd64/sym.c index 22baa59b2..9468e1957 100644 --- a/src/libmach_amd64/sym.c +++ b/src/libmach_amd64/sym.c @@ -83,6 +83,7 @@ static Sym *symbols; /* symbol table */ static Txtsym *txt; /* Base of text symbol table */ static uvlong txtstart; /* start of text segment */ static uvlong txtend; /* end of text segment */ +static uvlong firstinstr; /* as found from symtab; needed for amd64 */ static void cleansyms(void); static long decodename(Biobuf*, Sym*); @@ -385,6 +386,7 @@ buildtbls(void) return 1; isbuilt = 1; /* allocate the tables */ + firstinstr = 0; if(nglob) { globals = malloc(nglob*sizeof(*globals)); if(!globals) { @@ -428,6 +430,7 @@ buildtbls(void) hp = hist; ap = autos; for(p = symbols; i-- > 0; p++) { +//print("sym %d type %c name %s value %llux\n", p-symbols, p->type, p->name, p->value); switch(p->type) { case 'D': case 'd': @@ -474,6 +477,8 @@ buildtbls(void) tp->locals = ap; if(debug) print("TEXT: %s at %llux\n", p->name, p->value); + if (firstinstr == 0 || p->value < firstinstr) + firstinstr = p->value; if(f && !f->sym) { /* first */ f->sym = p; f->addr = p->value; @@ -1045,6 +1050,7 @@ fileline(char *str, int n, uvlong dot) bot = mid; else { line = pc2line(dot); + print("line %d\n", line); if(line > 0 && fline(str, n, line, f->hist, 0) >= 0) return 1; break; @@ -1269,7 +1275,10 @@ pc2line(uvlong pc) if(pcline == 0) return -1; currline = 0; - currpc = txtstart-mach->pcquant; + if (firstinstr != 0) + currpc = firstinstr-mach->pcquant; + else + currpc = txtstart-mach->pcquant; if(pc<currpc || pc>txtend) return ~0; |