summaryrefslogtreecommitdiff
path: root/ldso
diff options
context:
space:
mode:
authorBernd Schmidt <bernds_cb1@t-online.de>2007-12-03 22:46:53 +0000
committerBernd Schmidt <bernds_cb1@t-online.de>2007-12-03 22:46:53 +0000
commit3d2a55e7a31cbb50ca1677d09791ca147368b62a (patch)
tree80e67cff40350559c48890c5a67d870353e0375d /ldso
parent453094fb5857cddffe0ed05305806085ae3460c0 (diff)
Blackfin FD-PIC patch 2/6.
Add the necessary changes in ld.so and libdl to deal with targets that prepend an underscore to symbol names.
Diffstat (limited to 'ldso')
-rw-r--r--ldso/include/dl-defs.h6
-rw-r--r--ldso/ldso/ldso.c6
-rw-r--r--ldso/libdl/libdl.c27
3 files changed, 33 insertions, 6 deletions
diff --git a/ldso/include/dl-defs.h b/ldso/include/dl-defs.h
index 6a94ee9d9..19eab074f 100644
--- a/ldso/include/dl-defs.h
+++ b/ldso/include/dl-defs.h
@@ -175,4 +175,10 @@ typedef struct {
# define DL_MALLOC_ALIGN (__WORDSIZE / 8)
#endif
+#ifdef __UCLIBC_NO_UNDERSCORES__
+#define __C_SYMBOL_PREFIX__ ""
+#else
+#define __C_SYMBOL_PREFIX__ "_"
+#endif
+
#endif /* _LD_DEFS_H */
diff --git a/ldso/ldso/ldso.c b/ldso/ldso/ldso.c
index 89d9bbd56..3b3983b85 100644
--- a/ldso/ldso/ldso.c
+++ b/ldso/ldso/ldso.c
@@ -773,7 +773,7 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, DL_LOADADDR_TYPE load_addr,
* ld.so.1, so we have to look up each symbol individually.
*/
- _dl_envp = (unsigned long *) (intptr_t) _dl_find_hash("__environ", _dl_symbol_tables, NULL, 0);
+ _dl_envp = (unsigned long *) (intptr_t) _dl_find_hash(__C_SYMBOL_PREFIX__ "__environ", _dl_symbol_tables, NULL, 0);
if (_dl_envp)
*_dl_envp = (unsigned long) envp;
@@ -828,8 +828,8 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, DL_LOADADDR_TYPE load_addr,
}
/* Find the real malloc function and make ldso functions use that from now on */
- _dl_malloc_function = (void* (*)(size_t)) (intptr_t) _dl_find_hash("malloc",
- _dl_symbol_tables, NULL, ELF_RTYPE_CLASS_PLT);
+ _dl_malloc_function = (void* (*)(size_t)) (intptr_t) _dl_find_hash(__C_SYMBOL_PREFIX__ "malloc",
+ _dl_symbol_tables, NULL, ELF_RTYPE_CLASS_PLT);
/* Notify the debugger that all objects are now mapped in. */
_dl_debug_addr->r_state = RT_CONSISTENT;
diff --git a/ldso/libdl/libdl.c b/ldso/libdl/libdl.c
index f2303c52e..e4a49c83a 100644
--- a/ldso/libdl/libdl.c
+++ b/ldso/libdl/libdl.c
@@ -446,7 +446,22 @@ void *dlsym(void *vhandle, const char *name)
ElfW(Addr) from;
struct dyn_elf *rpnt;
void *ret;
-
+ /* Nastiness to support underscore prefixes. */
+ char tmp_buf[80];
+#ifndef __UCLIBC_NO_UNDERSCORES__
+ char *name2 = tmp_buf;
+ size_t nlen = strlen (name) + 1;
+ if (nlen + 1 > sizeof (tmp_buf))
+ name2 = malloc (nlen + 1);
+ if (name2 == 0) {
+ _dl_error_number = LD_ERROR_MMAP_FAILED;
+ return 0;
+ }
+ name2[0] = '_';
+ memcpy (name2 + 1, name, nlen);
+#else
+ const char *name2 = name;
+#endif
handle = (struct dyn_elf *) vhandle;
/* First of all verify that we have a real handle
@@ -460,7 +475,8 @@ void *dlsym(void *vhandle, const char *name)
break;
if (!rpnt) {
_dl_error_number = LD_BAD_HANDLE;
- return NULL;
+ ret = NULL;
+ goto out;
}
} else if (handle == RTLD_NEXT) {
/*
@@ -484,13 +500,18 @@ void *dlsym(void *vhandle, const char *name)
tpnt = NULL;
if (handle == _dl_symbol_tables)
tpnt = handle->dyn; /* Only search RTLD_GLOBAL objs if global object */
- ret = _dl_find_hash((char*)name, handle, tpnt, 0);
+ ret = _dl_find_hash(name2, handle, tpnt, 0);
/*
* Nothing found.
*/
if (!ret)
_dl_error_number = LD_NO_SYMBOL;
+out:
+#ifndef __UCLIBC_NO_UNDERSCORES__
+ if (name2 != tmp_buf)
+ free (name2);
+#endif
return ret;
}