diff options
| -rw-r--r-- | src/ldso/dynlink.c | 21 |
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 }; |