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Diffstat (limited to 'src/ldso/dynlink.c')
-rw-r--r--src/ldso/dynlink.c21
1 files changed, 19 insertions, 2 deletions
diff --git a/src/ldso/dynlink.c b/src/ldso/dynlink.c
index 9e9415ca..03f09208 100644
--- a/src/ldso/dynlink.c
+++ b/src/ldso/dynlink.c
@@ -12,6 +12,7 @@
#include <errno.h>
#include <limits.h>
#include <elf.h>
+#include <setjmp.h>
#include "reloc.h"
@@ -44,11 +45,14 @@ struct dso
ino_t ino;
int global;
int relocated;
- char name[];
+ char *name;
+ char buf[];
};
static struct dso *head, *tail, *libc;
static char *env_path, *sys_path;
+static int runtime;
+static jmp_buf rtld_fail;
#define AUX_CNT 15
#define DYN_CNT 34
@@ -115,6 +119,11 @@ static void do_relocs(unsigned char *base, size_t *rel, size_t rel_size, size_t
name = strings + sym->st_name;
ctx = IS_COPY(type) ? dso->next : dso;
sym_val = (size_t)find_sym(ctx, name, IS_PLT(type));
+ if (!sym_val && sym->st_info>>4 != STB_WEAK) {
+ if (runtime) longjmp(rtld_fail, 1);
+ dprintf(2, "%s: symbol not found\n", name);
+ _exit(127);
+ }
sym_size = sym->st_size;
}
do_single_reloc(reloc_addr, type, sym_val, sym_size, base, rel[2]);
@@ -308,6 +317,7 @@ static struct dso *load_library(const char *name)
p->ino = st.st_ino;
p->global = 1;
p->refcnt = 1;
+ p->name = p->buf;
strcpy(p->name, name);
tail->next = p;
@@ -323,7 +333,12 @@ static void load_deps(struct dso *p)
for (; p; p=p->next) {
for (i=0; p->dynv[i]; i+=2) {
if (p->dynv[i] != DT_NEEDED) continue;
- load_library(p->strings + p->dynv[i+1]);
+ if (!load_library(p->strings + p->dynv[i+1])) {
+ if (runtime) longjmp(rtld_fail, 1);
+ dprintf(2, "%s: %m (needed by %s)\n",
+ p->strings + p->dynv[i+1], p->name);
+ _exit(127);
+ }
}
}
}
@@ -395,6 +410,7 @@ void *__dynlink(int argc, char **argv, size_t *got)
.hashtab = (void *)(app_dyn[DT_HASH]),
.syms = (void *)(app_dyn[DT_SYMTAB]),
.dynv = (void *)(phdr->p_vaddr),
+ .name = argv[0],
.next = &lib
};
@@ -404,6 +420,7 @@ void *__dynlink(int argc, char **argv, size_t *got)
.hashtab = (void *)(aux[AT_BASE]+lib_dyn[DT_HASH]),
.syms = (void *)(aux[AT_BASE]+lib_dyn[DT_SYMTAB]),
.dynv = (void *)(got[0]),
+ .name = "libc.so",
.relocated = 1
};