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authorRich Felker <dalias@aerifal.cx>2011-07-24 02:19:47 -0400
committerRich Felker <dalias@aerifal.cx>2011-07-24 02:19:47 -0400
commit427173b9325d604d30650c16f1774942130aec52 (patch)
tree36bc3482d45922a8976a18f62926cd4f48a22240 /src/ldso
parente91c375fd027a485bd7415afbaf059d429e11e11 (diff)
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fix resolution of weak symbols (hopefully right now) and vdso
Diffstat (limited to 'src/ldso')
-rw-r--r--src/ldso/dynlink.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/src/ldso/dynlink.c b/src/ldso/dynlink.c
index d8f641ae..6c4abbfe 100644
--- a/src/ldso/dynlink.c
+++ b/src/ldso/dynlink.c
@@ -92,10 +92,12 @@ static Sym *lookup(const char *s, uint32_t h, Sym *syms, uint32_t *hashtab, char
}
#define OK_TYPES (1<<STT_NOTYPE | 1<<STT_OBJECT | 1<<STT_FUNC | 1<<STT_COMMON)
+#define OK_BINDS (1<<STB_GLOBAL | 1<<STB_WEAK)
static void *find_sym(struct dso *dso, const char *s, int need_def)
{
uint32_t h = hash(s);
+ void *def = 0;
if (h==0x6b366be && !strcmp(s, "dlopen")) rtld_used = 1;
if (h==0x6b3afd && !strcmp(s, "dlsym")) rtld_used = 1;
for (; dso; dso=dso->next) {
@@ -103,10 +105,13 @@ static void *find_sym(struct dso *dso, const char *s, int need_def)
if (!dso->global) continue;
sym = lookup(s, h, dso->syms, dso->hashtab, dso->strings);
if (sym && (!need_def || sym->st_shndx) && sym->st_value
- && (1<<(sym->st_info&0xf) & OK_TYPES))
- return dso->base + sym->st_value;
+ && (1<<(sym->st_info&0xf) & OK_TYPES)
+ && (1<<(sym->st_info>>4) & OK_BINDS)) {
+ def = dso->base + sym->st_value;
+ if (sym->st_info>>4 == STB_GLOBAL) break;
+ }
}
- return 0;
+ return def;
}
static void do_relocs(unsigned char *base, size_t *rel, size_t rel_size, size_t stride, Sym *syms, char *strings, struct dso *dso)
@@ -519,6 +524,7 @@ void *__dynlink(int argc, char **argv, size_t *got)
vdso->hashtab = (void *)(vdso->base + vdso_dyn[DT_HASH]);
vdso->strings = (void *)(vdso->base + vdso_dyn[DT_STRTAB]);
vdso->name = "linux-gate.so.1";
+ vdso->global = 1;
vdso->prev = lib;
lib->next = vdso;